CATL Patente

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A perovskite battery, a laminated solar cell, a photovoltaic module, a photovoltaic power generation system and an electric device, belonging to the technical field of photovoltaics. The perovskite battery comprises a perovskite light absorption layer and an electron transport layer comprising at least two transport sub-layers. The material of the transport sub-layers comprises metal oxide M<x>O<y>, M representing a metal element. The ratio of the number of metal atoms to the number of oxygen atoms in the transport sub-layers is x/y, and in the direction from the perovskite light absorption layer to the electron transport layer, the value of x/y of the transport sub-layers successively increases. Regulating the ratio of the number of metal atoms to the number of oxygen atoms of the metal oxide in the multi transport sub-layers of the perovskite battery can successively decrease the energy level structure in the electron transport layer in the direction from the perovskite light absorption layer to the electron transport layer, improve the transport capability of carriers in the electron transport layer, and increase the current of the perovskite battery, allowing the perovskite battery to have relatively high photoelectric energy conversion efficiency.

A battery welding system and a control method The battery welding system comprises a first conveying module (200) and a first welding module (100). The first conveying module (200) is configured to convey an incoming battery. The incoming battery comprises a casing and a top cover, the extension direction of a long side of the incoming battery being parallel to the conveying direction of the first conveying module (200). The first welding module (100) is arranged beside the first conveying module (200) and is configured to weld the joint of a long side of the casing and a long side of the top cover. During a long side welding process, the incoming battery continuously moves under the conveying of the first conveying module (200), and the first welding module (100) remains fixed.

Embodiments of the present disclosure provide a thermal management assembly (10), a battery box, a battery (100), and an electric device. The thermal management assembly (10) includes a flow channel plate (11), an energy absorption member (13), and multiple current collectors (12). The flow channel plate (11) is configured to convey fluid to exchange heat with the battery cell (30). The current collectors (12) are connected to the flow channel plate (11). The energy absorption member (13) is provided on a side of the current collector (12) facing away from the flow channel plate (11), where the energy absorption member (13) includes a force bearing portion (131) and a deformation portion (132), the force bearing portion (131) is located at an end of the deformation portion (132) away from the current collector (12), and a rigidity of the deformation portion (132) is less than a rigidity of the force bearing portion (131).

The present application applies to the technical field of batteries. Provided are a current collecting assembly and a preparation process therefor, a heat exchange apparatus, a battery and an electric device. The current collecting assembly includes a current collector and a connector, where the current collector is a non-metal part, and the connector is a metal part; the current collector and the connector constitute an integrally formed component; and the current collector is connected to a heat exchanger by means of the connector. The present application aims to reduce the processing difficulty of a heat exchange device, and can appropriately reduce the cost.

The present application provides a stacking device, a stacking system, and a stacking method. The stacking device comprises a separator unwinding mechanism and a stacking apparatus, and the separator unwinding mechanism is provided with an output part for outputting a separator. The stacking apparatus comprises a stacking platform for receiving the separator, the stacking platform has a first stacking position and a second stacking position in a first direction, the stacking platform is used for receiving a first electrode sheet at the first stacking position, and the stacking platform is used for receiving a second electrode sheet at the second stacking position. The polarities of the first electrode sheet and the second electrode sheet are opposite. The output part has a first output position and a second output position in the first direction, and the output part and the stacking platform can move in opposite directions. The output part is configured to switch between the second output position and the first output position when the stacking platform switches between the first stacking position and the second stacking position. The stacking device can adjust the relative position of the output part and the stacking platform more quickly, thereby reducing the movement time and stroke of the stacking platform, and improving the stacking efficiency.

The present application is applicable to the technical field of batteries (100), and provides a battery cell (10), a battery (100), an electric apparatus, and a device (2000) and method for processing a battery (100). The battery cell (10) includes an electrode assembly (11). The electrode assembly (11) includes a positive electrode sheet (111), a negative electrode sheet (112), and a separator (113). The positive electrode sheet (111), the negative electrode sheet (112) and the separator (113) are stacked or wound. Some portions of the separator (113) protrude beyond an edge of the positive electrode sheet (111) and an edge of the negative electrode sheet (112) to form edge sealing portions (1131); and some of the edge sealing portions (1131) are fixedly connected. In this way, the separator (113) can stably and reliably wrap the positive electrode sheet (111) and the negative electrode sheet (112), alleviating the problem of overlapping of the positive electrode sheet (111) and the negative electrode sheet (112) caused by folding of the separator (113), thereby improving the reliability of the battery cell (10).

Disclosed is an electrolyte filling method for a battery (2), the battery (2) comprising a switching valve (21) having an open state and a closed state. A processing apparatus comprises a vacuum evacuation system and an electrolyte filling system which are independent from each other. The electrolyte filling method comprises a vacuum evacuation step followed by an electrolyte filling step. The vacuum evacuation step comprises: connecting a vacuum evacuation pipe of the vacuum evacuation system to the switching valve (21) to bring the switching valve (21) into the open state; controlling a vacuum evacuation device of the vacuum evacuation system to perform vacuum evacuation on the battery (2); and separating the vacuum evacuation pipe from the switching valve (21) after it is confirmed that the vacuum evacuation is completed, so as to bring the switching valve (21) into the closed state. The electrolyte filling step comprises: connecting an electrolyte filling device (1) of the electrolyte filling system to the switching valve (21) to bring the switching valve (21) into the open state; controlling the electrolyte filling system to fill the battery (2) with an electrolyte; and separating an electrolyte filling pipe from the switching valve (21) after it is confirmed that the electrolyte filling is completed, so as to bring the switching valve (21) into the closed state.

The present disclosure provides a separator, a preparation method therefor, a battery, and an electrical apparatus. The separator comprises a base film and an adhesive layer at least located on one side of the base film. The adhesive layer comprises a polymer, the loss modulus of the polymer at 10°C being 5×10<6>Pa-9×10<8>Pa.

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A battery (1001) and an electrical device. The battery (1001) comprises: a casing (200), comprising a plurality of frames (202) forming side walls of the casing (200); and a plurality of battery cells (100), which are mounted in the casing (200), wherein the plurality of battery cells (100) comprise a first type of battery cells (101) and a second type of battery cells (102), the battery cells (100) at least abutting against the frames (202) being the second type of battery cells (102), and the energy density of the second type of battery cells (102) being greater than the energy density of the first type of battery cells (101). By using the second type of battery cells (102) as the battery cells (100) abutting against the frames (202), the battery cells (100) have better charging and discharging performance at low temperatures, thereby effectively improving the heat preservation performance and the charging and discharging performance of the battery (1001) at low temperatures, and reducing the temperature difference.

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The present application discloses a battery and an electric apparatus. The battery includes a battery cell and at least one cooling member. The battery cell includes a housing, at least one electrode assembly, and at least one buffer member. The electrode assembly and the buffer member are disposed in the housing; the buffer member is provided on at least part of a surface of the electrode assembly and/or inside the electrode assembly; and the at least one electrode assembly and the at least one buffer member are stacked along a first direction. The cooling member is provided on at least one side of the battery cell along the first direction.

A battery cell (100), a battery (1000), and an electric apparatus (2000) are provided. The battery cell (100) includes: a housing (10); an electrode assembly (20), provided in the housing (10), the electrode assembly (20) including an electrode plate (21) and a separator (22), the electrode plate (21) and the separator (22) being stacked and/or wound to form the electrode assembly (20); and a buffer member (30), provided in the housing (10), the buffer member (30) being provided on at least part of a surface of the electrode assembly (20) and/or inside the electrode assembly (20), where under the same pressure, a compression ratio of the buffer member (30) is greater than a compression ratio of the separator (22).

Provided are a battery and an electrical apparatus. The battery comprises a plurality of battery cells (100), one end of each battery cell (100) being provided with a first end surface (111) in the height direction, and the first end surface being provided with an electrode terminal (13); and a first thermal management component (310), each first end surface (111) being fixedly bonded to the first thermal management component (310) by means of a thermally conductive structural adhesive, and the first thermal management component (310) being provided with first openings (311) for exposing the electrode terminals (13). The first end surfaces (111) of the battery cells (100) are fixedly bonded to the first thermal management component (310) by means of the thermally conductive structural adhesive, so as to connect the plurality of battery cells (100) into a whole, thereby improving the overall structural strength of the battery, effectively resisting the expansion and deformation of the battery cells, and reducing the risk of battery cell failure due to the expansion and deformation. Moreover, the battery cells have a more stable temperature environment, and the height space in the battery can be further effectively saved, thereby helping to improve the energy density and volumetric utilization of the battery.

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A battery cell (20), a battery (100), and an electric apparatus are provided, belonging to the field of battery technology. The battery cell (20) includes a housing (21) and an end cover (22). An accommodating cavity (211) is formed inside the housing (21). At least one end of the accommodating cavity (211) in a first direction (X) is provided with an opening (212). The accommodating cavity (211) is configured to accommodate an electrode assembly (23). The end cover (22) includes a first cover body (221) and a second cover body (222) stacked along the first direction (X). The first cover body (221) is connected to the housing (21) to seal the opening (212). Strength of the second cover body (222) is greater than strength of the first cover body (221). Setting the strength of the second cover body (222) to be greater than the strength of the first cover body (221) allows the end cover (22) of this structure to be provided with the second cover body (222) having higher strength on one side of the first cover body (221), thereby improving the overall structural strength of the end cover (22). Thus, when the end cover (22) has the same structural strength, the end cover (22) can be connected to the housing (21) through the first cover body (221), and the overall thickness of the first cover body (221) and second cover body (222) of the end cover (22) after stacked in the first direction (X) can be optimized.

Provided are a positive electrode material, a method for preparing the positive electrode material, a positive electrode sheet, a battery, and an electric device. The positive electrode material comprises a core and a shell covering the core, the core and the shell both comprise primary particles, most of the primary particles in the core are distributed in the radial direction of the core, and the distribution of most of the primary particles in the shell is different from the radial distribution in the core. The particle strength of the positive electrode material is improved, thereby improving the cycle life, high-temperature storage performance and energy density of the battery.

A battery (1001) and an electrical apparatus. The battery (1001) comprises: a case (200), comprising first borders (2021) located at both ends in the width direction, each first border (2021) extending in the length direction of the case (200); and a plurality of cells (100), mounted inside the case (200), the length direction of each cell (100) being parallel to the length direction of the case (200), the cells (100) adjacent to each first border (2021) abutting against the first border (2021), and each first border (2021) being provided with a mounting beam (23). The length direction of the cells (100) is parallel to the length direction of the case (200), each first border (2021) abuts against the adjacent cells (100), and the first borders (2021) are located at the ends of the case (200) in the width direction, such that each first border (2021) abuts against large surfaces of the adjacent cells (100). Moreover, the first borders (2021) being provided with the mounting beams (23) facilitates mounting and use of the battery (1001), and the mounting beams (23) can provide constraining forces, so as to resist the expansion deformation of the cells (100).

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