CATL Patente

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The present application provides a secondary battery and a preparation method therefor, and an electric device. The secondary battery comprises a positive electrode sheet, the positive electrode sheet comprises a positive electrode active material and an additive, the positive electrode active material comprises a base material and a coating layer at least partially covering the base material, the coating layer comprises a lithium-supplementing material or a reducing material, the additive comprises a lithium-supplementing material or a reducing material, and the coating layer and the additive do not simultaneously comprise a lithium-supplementing material and do not simultaneously comprise a reducing material. The secondary battery has excellent cycle performance and long service life.

A case (10), a battery (100), and an electric device. The case (10) comprises a plate assembly (111). The plate assembly (111) comprises a first plate member (1111) and a second plate member (1112) that are stacked. The first plate member (1111) comprises a first plate body (11111) and a first frame edge portion (11112) connected to a side edge of the first plate body (11111). The second plate member (1112) comprises a second plate body (11121) and a second frame edge portion (11122) connected to a side edge of the second plate body (11121). The first frame edge portion (11112) is connected to the second frame edge portion (11122) to form a first edge beam structure (112). The first edge beam structure (112) defines an accommodating space (114) for accommodating a battery cell (20).

disclosure belongs to the technical field of batteries. Provided in the embodiments of the present disclosure are a battery, a battery pack and an electric apparatus. The battery comprises a temperature adjustment container and battery cells. The temperature adjustment container has a temperature adjustment chamber, and an inlet and an outlet that are respectively communicated with the temperature adjustment chamber, a weakened area being formed on the chamber wall of the temperature adjustment chamber. The battery cells are arranged on one side or two opposite sides of the temperature adjustment container in a preset direction, the preset direction intersecting the surfaces having the largest areas of the battery cells. When thermal runaway of the battery cells occurs, the pressure bearing capacity of the weakened area is smaller than the pressure bearing capacity of other areas except the weakened area of the chamber wall of the temperature adjustment chamber, such that fluid in the temperature adjustment chamber can flow out from a position corresponding to the weakened area. When thermal runaway occurs, the pressure of the temperature adjustment chamber is increased to open the weakened area, so as to cool battery cells undergoing thermal runaway rapidly, thus inhibiting thermal runaway of battery packs.

The present application is suitable for the technical field of power batteries, and provides a box body (400), a battery (200) and an electrical device (100). The box body comprises: a lower box body (40), which comprises a box body steel layer and a box body aluminum layer, and a temperature control assembly (50), which is connected to the lower box body, the temperature control assembly comprising a temperature control aluminum layer, and the temperature control aluminum layer being welded to the box body aluminum layer. The box body of the present application enables the material of the side of the temperature control assembly connected to the lower box body to be same as the material of the side of the lower box body connected to the temperature control assembly, so that the temperature control assembly can be connected to the lower box body more stably, thus reducing the difficulty of connecting the temperature control assembly to the lower box body.

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A battery (4) and a manufacturing method therefor, a top cover assembly (20), a battery pack, an electric device and an energy storage device. The battery (4) comprises: a case (10), which defines an accommodation space and is provided with an opening; a top cover assembly (20), which is arranged on the case (10), seals the opening, and comprises a top cover body (21), and a first connector (22) and a second connector (23), which can conduct electricity, wherein the first connector (22) comprises a first connection portion (221) and a first exposed portion (222) connected to the first connection portion (221), the second connector (23) comprises a second connection portion (231) and a second exposed portion (232) connected to the second connection portion (231), the first connection portion (221) and the second connection portion (231) each comprising a connection surface extending in a first direction, the first exposed portion (222) and the second exposed portion (232) being exposed outside the case (10); and an electrode assembly (30), which is accommodated in the accommodation space and comprises a positive tab (31) and a negative tab (32), which extend in the first direction, a first connection surface (221a) of the first connection portion (221) being in surface connection with the positive tab (31) or the negative tab (32), and a second connection surface (231a) of the second connection portion (231) being in surface connection with the positive tab (31) or the negative tab (32).

A battery, a pressure control unit, a battery pack, an electric device, and an energy storage device. The battery comprises a housing assembly, at least one battery cell, and at least one pressure control unit. The battery cell is accommodated in the housing assembly, and the battery cell comprises an electrode assembly stacked in a first direction. The pressure control unit is accommodated in the housing assembly, and at least when the battery cell swells, the pressure control unit applies an action force to the battery cell to control the stress on the surface of the swollen battery cell. The pressure control unit is configured such that the size of the pressure control unit in the first direction can change as the battery cell swells.

An electrode sheet, an electrode assembly, a battery cell and a preparation method therefor, a battery, and an electric device, relating to the technical field of batteries. A protective layer is provided on at least the surface of an end portion of the electrode sheet, and the protective layer comprises silicon oxide; and on the basis of the total mass of all elements of a first position of the electrode sheet, the mass content A of an Si element satisfies: A is less than 0.01 wt%, and the first position is a position 5 mm distant from the surface of the end portion.

A battery (100), a battery pack, an electric device, and a battery module, which belong to the technical field of batteries. The battery (100) comprises a wrapping structure (1), a conductive terminal (2), and battery cells (3), wherein an accommodating space (11) is formed in the wrapping structure (1); a pressure relief port (12) in communication with the accommodating space (11) is formed in one side of the wrapping structure (1); and the remaining part of the wrapping structure (1) is of a sealed structure. The conductive terminal (2) is connected to the wrapping structure (1), and the conductive terminal (2) and the pressure relief port (12) are located on different sides of the wrapping structure (1). The battery cells (3) are located in the accommodating space (11), and tabs (31) of the battery cells (3) are electrically connected to the conductive terminal (2). By means of the wrapping structure (1), a thermal runaway gas in the accommodating space (11) is guided to be ejected through the pressure relief port (12), thereby achieving the directional ejection of the thermal runaway gas in the accommodating space (11) of the battery (100). The conductive terminal (2) and the pressure relief port (12) are located on different sides of the wrapping structure (1), such that the thermal runaway gas ejected through the pressure relief port (12) can be directed as far away as possible from the conductive terminal (2).

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The present application relates to the field of batteries. Provided are a battery cell, a battery and an electric device. The battery cell comprises a casing and an electrode assembly, wherein the electrode assembly is accommodated in the casing. The electrode assembly comprises a body portion, a first tab and a second tab, wherein the first tab and the second tab respectively protrude from two ends of the body portion, and the first tab and the second tab are asymmetrically arranged. The first tab and the second tab of the battery cell are asymmetrically arranged; and compared with the solution in the prior art where two tabs of a battery cell are symmetrically arranged, the first tab and the second tab of the electrode assembly of the battery cell have no axis of symmetry, and the first tab and the second tab are stressed unevenly, such that the electrode assembly does not easily rotate, and thus the first tab and the second tab are not easily torn, thereby facilitating the prolonging of the service life of the battery cell.

The present application provides a heat exchange assembly (13), a box body (10), a battery (100) and an electrical device. A heat exchange flow channel (133) is formed in the heat exchange assembly (13). The heat exchange assembly (13) comprises a first plate body (131) and a second plate body (132), the first plate body (131) comprising a first connecting layer member (1311), and the second plate body (132) comprising a reinforcing layer member (1321) and a second connecting layer member (1322). The reinforcing layer member (1321) and the second connecting layer member (1322) are stacked and connected to each other. The second connecting layer member (1322) and the first connecting layer member (1311) are stacked and hermetically connected to each other, so as to close the heat exchange flow channel (133).

A battery, a pressure control unit, a battery pack, a power consuming device, and an energy storage device. The battery comprises a case assembly, at least one battery cell and at least one pressure control unit. The battery cell is accommodated in the case assembly, the battery cell comprising electrode assemblies stacked in a first direction. The pressure control unit comprises a fluid pouch, an accommodating cavity being formed in the fluid pouch; a fluid medium is accommodated in the accommodating cavity, such that the fluid pouch can contract or expand through flow of the fluid medium, thereby applying acting force to the battery cell by means of fluid pressure generated by the fluid medium. The pressure control unit applies acting force to the battery cell at least in an expanded state of the battery cell, so as to control the surface stress of the expanded battery cell.

Disclosed in the present application are a composite porous membrane, a preparation method therefor, a battery and an electrical device. The composite porous membrane comprises an organic polymer substrate and an inorganic electrolyte, the inorganic electrolyte being dispersed in the organic polymer substrate. A plurality of holes of different diameters are formed in the composite porous membrane, the ionic conductivity of the composite porous membrane being 1×10<-4> S/cm - 5×10<-4> S/cm. Thus, the organic polymer substrate, the inorganic electrolyte and the holes in the composite porous membrane can all transport active metal ions, which increases transport paths of the active metal ions, thereby increasing the transport rate of the active metal ions and accordingly improving the power performance of batteries.

A battery cell (12), a battery (100) and an electric device, which belong to the technical field of batteries. The battery cell (12) comprises a casing (121), a first insulating member (125) and a second insulating member (126), wherein the casing (121) comprises a first wall (1213), a second wall (1214) and a side wall (1215); in the direction of the thickness of the first wall (1213), the second wall (1214) and the first wall (1213) are arranged opposite each other; the side wall (1215) is arranged around the first wall (1213) and the second wall (1214); and the first wall (1213) has first edges (12131) and second edges (12132), which are adjacent to one another. The first insulating member (125) covers an outer surface of the first wall (1213). The second insulating member (126) comprises a body portion (1260), first flange portions (1261) and second flange portions (1262), wherein the body portion (1260) covers an outer surface of the side wall (1215); the first flange portions (1261) and the second flange portions (1262) are arranged on the outer surface of the first wall (1213); the first flange portions (1261) are arranged along the first edges (12131); and the second flange portions (1262) are arranged along the second edges (12132). The first insulating member (125) covers at least part of each first flange portion (1261) and at least part of each second flange portion (1262). The first insulating member (125) covers at least part of each first flange portion (1261) and at least part of each second flange portion (1262) to improve the reliability of the battery cell (12).

The present application provides a heat exchange assembly (13), a box body (10), a battery (100), and an electrical device. The heat exchange assembly (13) comprises a first plate body (131) and a second plate body (132). The first plate body (131) has a first plate surface (1311), and the first plate body (131) comprises a first reinforcement layer member (1312). The second plate body (132) and the first plate body (131) are arranged in a stacked manner, and the second plate body (132) has a second plate surface (1321). A heat exchange flow channel (133) is provided on the first plate surface (1311) and/or the second plate surface (1321). At least part of the projection of the heat exchange flow channel (133) on a reference plane overlaps with the projection of the first reinforcement layer member (1312) on the reference plane, and the reference plane is perpendicular to the stacking direction of the first plate body (131) and the second plate body (132).

A battery cell, a battery unit, a battery pack, and an electric device, relating to the technical field of batteries. The battery cell comprises a casing assembly (1), a bare cell (2), and poles (3). The bare cell (2) is arranged inside the casing assembly (1). The poles (3) are arranged on the casing assembly (1). The poles (3) are electrically connected to tabs (20) of the bare cell (2). Each pole (3) comprises a first connecting part (30) and a second connecting part (31) which are connected to each other. When projected along an arrangement direction of the bare cell (2) and the poles (3), the projection area of the first connecting part (30) and the projection area of the second connecting part (31) do not overlap. The first connecting part (30) is welded to the corresponding tab (20) of the bare cell (2). The second connecting part (31) is welded to a busbar. The technical solution can increase the space utilization rate of a battery cell and improves the energy density of the battery cell.

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A positive electrode sheet and a battery cell comprising the positive electrode sheet, a battery, and an electric device. The positive electrode sheet comprises a composite current collector and a positive electrode film layer provided on at least one surface of the composite current collector. The composite current collector comprises a polymer material base layer and a metal composite layer located on at least one surface of the polymer material base layer, and the active material of the positive electrode film layer comprises the Ni element. The metal composite layer comprises a metal matrix layer and a metal oxide layer which are stacked. The resistivity of the metal oxide layer is greater than that of the metal matrix layer. The positive electrode sheet can effectively alleviate DCR deterioration and reduce battery failure.

A battery and an electric device, relating to the technical field of batteries. The battery comprises a case, a battery cell and a treatment mechanism. The case forms an exhaust channel; the battery cell is accommodated in the case; the treatment mechanism forms a treatment channel and comprises at least one treatment module arranged at the treatment channel, the treatment channel is communicated with the exhaust channel and the external environment, and the treatment module is used for treating fumes flowing through the treatment channel.

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A battery case, a battery and an electrical device, which relate to the technical field of batteries. The battery case comprises a case body (10) and a wire harness bracket (20). The case body (10) is provided with an accommodating cavity extending in a first direction, and the case body (10) is provided with a weight-reduction cavity (11), wherein the weight-reduction cavity (11) passes through a first side surface (12) of the case body, the first side surface (12) intersecting the first direction, and the first direction being the same as the height direction of the case body (10). The wire harness bracket (20) is located outside the accommodating cavity, one end of the wire harness bracket (20) extends into the weight-reduction cavity (11) from the first side surface (12), and at least part of the wire harness bracket (20) that is located outside the weight-reduction cavity (11) is configured to support a wire harness. The wire harness bracket (20) is mounted and fixed by means of the existing weight-reduction cavity (11) of the battery case, so as to ensure that the wire harness bracket (20) is fixed, and there is no need to provide an additional connecting hole in the battery case for mounting of the wire harness bracket (20), so that the strength of the battery case is not affected, no additional manufacturing process is added, and the battery case is simpler. The mounted and fixed wire harness bracket (20) supports the wire harness, thereby improving the stability of the wire harness and reducing the possibility of the wire harness falling off and damaging a connector.

A battery pack, a battery module, a battery unit, and an electrical device, relating to the technical field of batteries. An accommodating space (11) is formed inside a case (1) of the battery pack, and at least one battery unit is located in the accommodating space (11). Each battery unit comprises a casing (21) and at least one pouch cell (22); a cell cavity (211) is formed inside the casing (21); the at least one pouch cell (22) is provided in the cell cavity (211); at least one side of the casing (21) is provided with an electrode assembly (23) for electrically connecting to other structures; at least one side of the casing (21) is provided with a pressure relief port (212) for pressure relief; and the electrode assembly (23) and the pressure relief port (212) are located on different sides of the casing. Thermal runaway gas in the cell cavity (211) is ejected from the pressure relief port (212) under the guidance of the casing (21), so that gas emitted during thermal runaway of the battery unit is ejected in a preset direction, thereby realizing directional ejection of the thermal runaway gas of the battery unit. The electrode assembly (23) and the pressure relief port (212) are located on different sides of the casing, so that the thermal runaway gas ejected from the pressure relief port can avoid the electrode assembly (23) as much as possible.

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The present application relates to a battery cell, a battery, and an electric device. The battery cell comprises: an electrolyte solution, the electrolyte solution containing an electrolyte salt, and the electrolyte salt comprising a salt capable of releasing free halogen ions during use of the battery cell; and a positive electrode sheet, the positive electrode sheet comprising a composite current collector and a positive electrode film layer provided on at least one side of the composite current collector, wherein the composite current collector comprises a supporting layer and a metal layer arranged on at least one side of the supporting layer, a protective layer is arranged on at least one side of the metal layer, and the protective layer comprises a metal oxide. The battery cell can achieve both good service life and power performance.

A battery (1) and an electric apparatus. The battery (1) comprises a cooling structure (12) and battery cells (13), wherein there are at least two battery cells (13), and the battery cells (13) are sequentially arranged. Each battery cell (13) comprises a housing (131) and an electrode assembly, the housing (131) forming a first accommodation cavity, and the first accommodation cavity being used for accommodating the electrode assembly; the housing (131) is provided with a first surface (1311), the first surface (1311) corresponding to the at least one battery cell (13) being recessed towards the first accommodation cavity to form a cooling clearance area (13111), and a cooling structure (12) being provided in each cooling clearance area (13111).

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A battery cell, a battery, an electrical apparatus, and an energy storage apparatus. The battery cell comprises: an electrode assembly, which comprises at least two layers of stacked electrode sheets; a casing, an accommodating space being formed in the interior of the casing, the electrode assembly being located in the accommodating space, the casing comprising a first side wall and a second side wall, the first side wall being located on one side of the electrode assembly in the layer thickness direction, the plane on which the first side wall is located intersecting the plane on which the second side wall is located, and the first side wall being connected to the second side wall by means of a transition portion; and an elastic pad, which is located between the electrode assembly and the first side wall. The elastic pad is arranged between the electrode assembly and the first side wall, the electrode assembly can avoid the transition portion during expansion of the electrode assembly, and the elastic pad can also absorb a compressive force during the expansion of the electrode assembly. As a result, the risk of active material detachment caused by mutual compression and abrasion between the electrode assembly and the transition portion of the casing is more effectively reduced, thereby mitigating the phenomenon of lithium plating and prolonging the service life of a battery.

The present application relates to a battery cell, a battery, and an electric device. The battery cell comprises an electrolyte and a positive electrode sheet. The electrolyte contains an electrolyte salt, the electrolyte salt comprises a salt capable of releasing free halogen ions during use of the battery cell, and the concentration A of the electrolyte salt in the electrolyte is 0.5 mol/L to 2 mol/L; the positive electrode sheet comprises a composite current collector and a positive electrode film layer arranged on at least one side of the composite current collector, the composite current collector comprises a supporting layer and a metal layer arranged on at least one side of the supporting layer, and the thickness B of the metal layer is 500 nm to 4000 nm. The battery cell can ensure both high quality energy density and good cycle performance.

Disclosed in the present application are a housing structure (100) of a power distribution unit, a power distribution unit (200), a battery (300), and an electrical device (400). The housing structure (100) of the power distribution unit comprises: an insulating housing (110), in which an inner cavity for mounting an electrical component is formed, the insulating housing (110) being provided with a mounting side wall (111); a connector (120), which is mounted on the outer side of the mounting side wall (111) facing away from the inner cavity, the connector (120) being provided with a connection terminal (121) and a shielding layer (122), the shielding layer (122) surrounding the connection terminal (121), and the connection terminal (121) extending into the inner cavity and being electrically connected to the electrical component; a metal plate (130), which is mounted on the outer side of the mounting side wall (111) facing away from the inner cavity, the metal plate (130) being located between the connector (120) and the mounting side wall (111), the metal plate (130) being provided with a mounting through hole (131), the connection terminal (121) passing through the mounting through hole (131), and the shielding layer (122) being electrically connected to the metal plate (130); and a grounding portion (140), a first end (141) of the grounding portion being electrically connected to the metal plate (130), and a second end (142) of the grounding portion being grounded. The present technical solution aims at solving the problem of low assembly efficiency of power distribution units due to complex overall design structures of power distribution units in the related technologies.

A hold-down bar (13), a battery (10), and an electric device. The hold-down bar (13) comprises: a hold-down bar body (131), in which a mounting groove (1311) is formed; and connectors (132), wherein two ends of the hold-down bar body (131) are respectively connected to the connectors (132), and each connector (132) comprises a main body section (1321) connected to the hold-down bar body (131) and an assembly section (1322) configured to be connected to a case (11) of the battery (10), at least part of the main body section (1321) being mounted in the mounting groove (1311).

Disclosed are a heat exchange apparatus and an energy storage apparatus. The heat exchange apparatus comprises a housing, which comprises an inner cavity and an air inlet and an air outlet that are in communication with the inner cavity; a heat exchange assembly, which comprises a condenser, the condenser being disposed in the inner cavity and being located between the air inlet and the air outlet; and a cross-flow fan, which is disposed in the inner cavity, the cross-flow fan comprising a rotatable cross-flow impeller, and the cross-flow impeller being located between the condenser and the air outlet.

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