Battery device and electric device

Abstract

The utility model discloses a battery device and an electric device, and belongs to the technical field of batteries. The battery device comprises a battery cell row and a box body, the battery cell row is arranged in the box body in a bonding manner and comprises a plurality of soft package battery cells which are stacked along the thickness direction; wherein a reinforcing partition plate is arranged between the large surfaces of at least two adjacent soft package battery cells in the battery cell row, the reinforcing partition plate is connected with the box body, the rigidity of the reinforcing partition plate is greater than that of a soft package shell of the soft package battery cells, and the reinforcing partition plate exchanges heat with the soft package battery cells. According to the technical scheme, the production efficiency, the energy density and the reliability of the battery device are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery device and an electric device. Background Art

[0002] In recent years, new energy vehicles have achieved leapfrog development. In the field of electric vehicles, power batteries, as the power source of electric vehicles, play an irreplaceable and important role. Among them, some power batteries use soft-pack battery cells. However, due to the characteristics that soft-pack battery cells are prone to deformation and difficult to dissipate heat, the further improvement of the reliability of power batteries is restricted. Summary of the Utility Model

[0003] An embodiment of the utility model provides a battery device and an electric device, which are beneficial to improving the reliability of soft-pack battery cells.

[0004] In a first aspect, an embodiment of the utility model provides a battery device, which includes: a battery cell row and a box body; the battery cell row is adhesively arranged in the box body, and the battery cell row includes a plurality of soft-pack battery cells stacked along the thickness direction; wherein, a reinforcing partition is arranged between the large surfaces of at least two adjacent soft-pack battery cells in the battery cell row, the reinforcing partition is connected to the box body, the rigidity of the reinforcing partition is greater than that of the soft-pack outer shell of the soft-pack battery cell, and the reinforcing partition exchanges heat with the soft-pack battery cell.

[0005] In the above technical solution, by adhesively connecting the box body and the battery cell row, on the one hand, the connection between the box body and the battery cell row is simplified, the production efficiency of the battery device is improved, on the other hand, the introduction of parts can be saved, the cost is reduced, the connection process is simplified, and the space occupation in the box body is reduced, thereby facilitating the improvement of the energy density of the battery device. By connecting the reinforcing partition to the box body, the fixing of the reinforcing partition can be realized, so that the reinforcing partition can effectively support the soft-pack battery cells, improve the rigidity of the battery cell row, and thus improve the overall rigidity of the battery device. In addition, by arranging the reinforcing partition to exchange heat with the soft-pack battery cell and connecting the reinforcing partition to the box body, a heat conduction path for heat exchange can also be formed at the connection between the reinforcing partition and the box body, so that the soft-pack battery cell is conducive to transferring heat to the box body through the reinforcing partition, and the heat dissipation efficiency of the soft-pack battery cell is improved.

[0006] In some embodiments, the battery device includes a box body for loading the battery cell row, and the edge of the reinforcing partition has a connecting portion protruding from the soft-pack battery cell, and the connecting portion is used for forming a connection with the box body.

[0007] In the above technical solution, by providing a reinforcing partition connected to the box body, a reliable connection between the battery cell row and the box body can be achieved, improving the connection reliability between the battery cell row and the box body. When the area of the surface of the soft-pack battery cell facing the box body is small and it is difficult to achieve a reliable connection between the soft-pack battery cell and the box body, the use of the reinforcing partition to connect with the box body can enhance the connection reliability between the battery cell row and the box body, enabling the soft-pack battery cell to work stably and reliably.

[0008] In some embodiments, the box body includes a box body main body and a mounting bracket. The mounting bracket is installed inside the box body main body, and the connecting portion is connected to the mounting bracket.

[0009] In the above technical solution, by installing the mounting bracket inside the box body main body and making the reinforcing partition connected to the box body through the mounting bracket, the connection difficulty between the reinforcing partition and the box body can be reduced, realizing the flexible installation of the reinforcing partition and the box body. In addition, the shape, position, and material of the mounting bracket can be flexibly designed to further reduce the connection difficulty with the reinforcing partition and improve the connection reliability with the reinforcing partition, enhancing the reliability and stability of the mounting bracket for fixing the battery cell row.

[0010] In some embodiments, the soft-pack battery cells in the battery cell row are arranged along the thickness direction of the soft-pack battery cells. The width direction of the soft-pack battery cells is the vertical direction, and the length direction of the soft-pack battery cells is the horizontal direction. The mounting bracket is provided on one side in the length direction of the soft-pack battery cells.

[0011] In the above technical solution, both the battery cell row and the mounting bracket can reduce the occupation of the vertical space, which is beneficial to enhancing the structural compactness of the battery device along the vertical direction, reducing the size of the battery device along the vertical direction, and facilitating the arrangement of the battery device in positions with limited vertical space (such as under the vehicle floor, etc.). Moreover, there is no stacking relationship along the vertical direction between the soft-pack battery cells in the battery cell row, improving the consistency of the soft-pack battery cells in the battery cell row. And the setting position of the mounting bracket is conducive to connecting with each reinforcing partition in the battery cell row, thereby enhancing the reliability and stability of the mounting bracket for fixing the battery cell row.

[0012] In some embodiments, the upper end of the mounting bracket is lower than the upper end of the soft-pack battery cell to form an upper clearance space above the mounting bracket, and the connecting portion is connected to the mounting bracket at a position lower than the upper clearance space.

[0013] In the above technical solution, by reserving the upper clearance space above the mounting bracket, other components of the battery device can be arranged using the upper clearance space. For example, it can be used to arrange circuits, etc., thus making full use of the space above the mounting bracket, reducing the space occupation of other positions, and being beneficial to improving the compactness and energy density of the battery device.

[0014] In some embodiments, the connecting portion is connected to the upper part of the mounting bracket, and the lower end of the connecting portion is higher than the lower end of the mounting bracket, so as to form a lower clearance space below the connecting portion. The soft-pack battery cell has a conductive member electrically connected to the electrode assembly of the soft-pack battery cell, and at least a part of the conductive member is exposed outside the soft-pack housing and located in the lower clearance space.

[0015] In the above technical solution, by setting the size of the connecting portion in the up-down direction to be relatively small and setting it relatively above the mounting bracket, a lower clearance space can be formed below the connecting portion, so that the lower clearance space can be used to accommodate the conductive member of the soft-pack battery cell, thereby making full use of the space below the connecting portion, reducing the space occupation of other positions, and thus being beneficial to improving the compactness and energy density of the battery device.

[0016] In some embodiments, one mounting bracket is connected to at least two connecting portions.

[0017] In the above technical solution, by setting one mounting bracket to be connected to at least two connecting portions, the number of mounting brackets used can be reduced to a certain extent, the number of components can be reduced, and the assembly efficiency can be improved.

[0018] In some embodiments, the mounting bracket includes a plurality of side walls arranged at intervals along the arrangement direction of the soft-pack battery cells in the battery cell row, each side wall corresponds to a connecting portion, and the connecting portion is connected to the side wall.

[0019] In the above technical solution, while the mounting bracket satisfies the connection with the connecting portion, it can reduce the space occupation and can minimize the material cost of the mounting bracket to achieve lightweight.

[0020] In some embodiments, there are a plurality of mounting brackets arranged along the arrangement direction of the soft-pack battery cells in the battery cell row. Each mounting bracket includes two side walls and a connecting wall connecting the two side walls, and the adjacent side walls of two adjacent mounting brackets clamp the same connecting portion.

[0021] In the above technical solution, the processing difficulty of a single mounting bracket can be reduced, which is convenient for the flexible connection between the soft-pack battery cell and the mounting bracket.

[0022] In some embodiments, one of the length direction and the width direction of the box body is the first direction, the other is the second direction, the height direction of the box body is the third direction, the soft-pack battery cells in the battery cell row are arranged along the first direction, the first direction is the thickness direction of the soft-pack battery cell, the second direction is the length direction of the soft-pack battery cell, the third direction is the width direction of the soft-pack battery cell, and mounting brackets are respectively provided at both ends of the box body in the second direction.

[0023] In the above technical solution, the arrangement position of the mounting brackets is conducive to connecting with each reinforcing partition and is not likely to cause an increase in the size of the box body in the height direction, which is conducive to ensuring that the height size of the box body is relatively small.

[0024] In some embodiments, a plurality of mounting brackets arranged along the first direction are respectively provided at each end of the box body in the second direction.

[0025] In the above technical solution, by providing a plurality of mounting brackets, it is conducive to flexibly connecting with a plurality of reinforcing partitions and reducing the connection difficulty between the reinforcing partitions and the mounting brackets.

[0026] In some embodiments, a battery module is provided in the box body. The battery module includes two battery cell rows arranged along the second direction, and all the soft-pack battery cells in each battery cell row are stacked in sequence along the thickness direction of the soft-pack battery cells; the two battery cell rows in the same battery module are respectively connected to the corresponding mounting brackets at the ends away from each other in the second direction.

[0027] In the above technical solution, the length of a single soft-pack battery cell can be reduced, and the processing difficulty of a single soft-pack battery cell can be reduced.

[0028] In some embodiments, the length direction of the reinforcing partition extends along the second direction, and the two length ends of the reinforcing partition respectively extend to the two ends of the battery module in the second direction, so that the two battery cell rows in the battery module share the reinforcing partition, and the two length ends of the reinforcing partition are respectively and correspondingly connected to the mounting brackets at the two ends of the box body in the second direction.

[0029] In the above technical solution, the length of the reinforcing partition is relatively long, which can reduce the number of reinforcing partitions and make the overall stability of the battery module better. Moreover, there is no need to provide a mounting bracket between the two battery cell rows in the battery module, so that the number of mounting brackets used can be reduced, the assembly efficiency can be improved, and the production cost can be reduced.

[0030] In some embodiments, the battery device includes a box body for loading battery cell rows. The box body includes top and bottom covers provided on both sides of the battery cell rows along the height direction of the box body. The battery device further includes: a heat exchange plate, which is provided between the battery cell rows and the cover and is used for heat exchange with the battery cell rows.

[0031] In the above technical solution, the heat exchange plate can conveniently perform heat exchange with a plurality of soft-pack battery cells, so that the battery cell rows can obtain good heat exchange effects, the battery cell rows can work stably and reliably, and further the battery device works more stably.

[0032] In some embodiments, the width direction of the soft-pack battery cells is consistent with the height direction of the box body. One surface of the soft-pack outer shell facing the heat exchange plate in the width direction of the soft-pack battery cells is a plane and is connected to the heat exchange plate through a heat-conducting medium.

[0033] In the above technical solution, the surface of the soft-pack housing facing the heat exchange plate is set as a flat surface, which can enable the soft-pack housing to have a stable mating contact surface with the heat exchange plate, so that the soft-pack housing can be stably and reliably fixed to the heat exchange plate through heat-conducting glue or a heat-conducting pad, thereby making the assembly and fixation of the soft-pack battery cell on the heat exchange plate more convenient and stable, making the assembly and fixation of the battery cell row and the heat exchange plate more reliable, and further improving the heat exchange reliability.

[0034] In some embodiments, the battery device includes a box body for loading the battery cell row. The box body includes cover plates arranged on both sides of the battery cell row along the height direction of the box body. The cover plates on both sides are respectively a top plate and a bottom plate. The box body further includes: a heat exchange plate, which is arranged between the battery cell row and the bottom plate and is used for heat exchange with the battery cell row, and a mounting bracket is arranged on the top of the heat exchange plate.

[0035] In the above technical solution, by arranging the mounting bracket on the top of the heat exchange plate, the mounting bracket can exchange heat with the heat exchange plate, avoiding heat being concentrated on the mounting bracket, thereby facilitating improving the overall heat dissipation effect of the battery device.

[0036] In some embodiments, the thickness of the reinforcing partition is less than the thickness of the soft-pack battery cell.

[0037] In the above technical solution, by setting the thickness of the reinforcing partition to be less than the thickness of the soft-pack battery cell, the occupation of the space inside the box body by the reinforcing partition can be reduced, which is beneficial to improving the energy density of the battery device.

[0038] In some embodiments, the thickness of the reinforcing partition is 0.8 mm to 2.0 mm.

[0039] In the above technical solution, by setting the thickness of the reinforcing partition to be 0.8 mm to 2.0 mm, the reinforcing partition will not be too small and can have good support strength to stably and reliably support the soft-pack battery cell, and at the same time, the thickness of the reinforcing partition will not be too large, so that the occupation of space by the reinforcing partition can be reduced. That is, the reinforcing partition can reduce the occupation of space while meeting the support requirements, which is beneficial to improving the energy density of the battery device.

[0040] In some embodiments, the reinforcing partition is a metal plate.

[0041] In the above technical solution, by processing the reinforcing partition with a metal material, the reinforcing partition can have sufficient support ability even when the thickness is small, and can also have good heat conduction performance, which is beneficial to the reliable support of the soft-pack battery cell by the reinforcing partition and rapid heat exchange.

[0042] In some embodiments, the reinforcing partition is an aluminum plate, an aluminum alloy plate, a copper plate or a steel plate.

[0043] In the above technical solution, when the reinforcing partition is made of aluminum plate, aluminum alloy plate, copper plate or steel plate, the material selected for the reinforcing partition has a relatively low cost and is easily obtainable, and can have good supporting strength and heat exchange performance under a relatively thin thickness.

[0044] In some embodiments, the reinforcing partition is of a solid structure.

[0045] In the above technical solution, by setting the reinforcing partition as a solid structure, that is, in the form of a solid plate, the reinforcing partition can have better strength, improve the support reliability for the soft-pack battery cell, enable the soft-pack battery cell to obtain more stable and reliable support, and is more conducive to improving the problem of transmitting force between adjacent soft-pack battery cells and reducing the extrusion between adjacent soft-pack battery cells.

[0046] In some embodiments, a cavity is formed inside the reinforcing partition.

[0047] In the above technical solution, by providing a cavity inside the reinforcing partition, the reinforcing partition can utilize the cavity to absorb the expansion force of the soft-pack battery cell, that is, provide an expansion space, avoid the problem of excessive extrusion of the soft-pack battery cell when the soft-pack battery cell expands too much, and improve the reliability of the battery cell row. Moreover, when the battery cell row is subject to some collisions, the cavity can be used to absorb the collision force and protect the soft-pack battery cell.

[0048] In some embodiments, the cavity includes a heat exchange flow channel for arranging a heat exchange medium.

[0049] In the above technical solution, the reinforcing partition can perform heat exchange with the soft-pack battery cell by using the heat exchange medium in the heat exchange flow channel, and can optimize the heat management performance of the reinforcing partition for the soft-pack battery cell through the selection and control of the heat exchange medium. In addition, the heat exchange flow channel can be connected to an external heat management system, enabling the heat exchange medium to circulate and be controlled to adjust the temperature. At this time, the reinforcing partition can integrate the liquid cooling heat exchange function, reduce the additional heat exchange structure, thus simplifying the battery device, reducing the number of components, and improving the energy density of the battery device.

[0050] In some embodiments, the heat exchange flow channel penetrates from one end of the length of the reinforcing partition to the other end of the length of the reinforcing partition.

[0051] In the above technical solution, by setting the heat exchange flow channel to penetrate from one end of the length of the reinforcing partition to the other end of the length of the reinforcing partition, the heat exchange performance of the reinforcing partition with the soft-pack battery cell in the entire length direction can be improved.

[0052] In some embodiments, reinforcing ribs are provided inside the cavity.

[0053] In the above technical solution, by arranging reinforcing ribs in the cavity, while the reinforcing partition has a cavity inside, the reinforcing partition can have better support strength, improve the support reliability of the reinforcing partition for the soft-pack battery cell, and at the same time, while ensuring the support reliability, reduce the weight of the reinforcing partition, reduce the material cost of the reinforcing partition, and achieve the light weight and low cost of the battery device.

[0054] In some embodiments, the length direction of the reinforcing partition extends along the length direction of the soft-pack battery cell, wherein the length of the reinforcing partition is greater than 80% of the length of the soft-pack battery cell; and / or, the width of the reinforcing partition is greater than 80% of the width of the soft-pack battery cell.

[0055] In the above technical solution, the reinforcing partition can cover the soft-pack battery cell to a large extent, improving the support and heat exchange effects on the soft-pack battery cell.

[0056] In some embodiments, multiple adjacent battery cell rows arranged along the length direction of the soft-pack battery cell share the reinforcing partition.

[0057] In the above technical solution, by arranging multiple battery cell rows along the length direction of the soft-pack battery cell, it is beneficial to improve the energy density of the battery device. And compared with the solution of using a single long soft-pack battery cell, in this embodiment, the length of a single soft-pack battery cell can be reduced, thereby reducing the processing difficulty of a single soft-pack battery cell. Moreover, through the sharing of the reinforcing partition, the number of arranged reinforcing partitions can be reduced, and the stability of the overall structure can be improved.

[0058] In some embodiments, the length of the reinforcing partition is greater than twice the length of the soft-pack battery cell, so that two adjacent battery cell rows arranged along the length direction of the soft-pack battery cell share the reinforcing partition.

[0059] In the above technical solution, and by setting the length of the reinforcing partition to be greater than twice the length of the soft-pack battery cell, so that two adjacent battery cell rows arranged along the length direction of the soft-pack battery cell share the reinforcing partition, the reinforcing partition can support two soft-pack battery cells adjacent to each other along the length direction of the soft-pack battery cell at the same time, and can provide relatively sufficient support and heat exchange for each soft-pack battery cell in the length direction of the soft-pack battery cell.

[0060] In some embodiments, the width of the reinforcing partition is less than the width of the soft-pack battery cell.

[0061] In the above technical solution, by setting the width of the reinforcing partition to be less than the width of the soft-pack battery cell, the reinforcing partition is not likely to extend beyond the soft-pack battery cell along the width direction, avoiding occupying the space in the width direction of the soft-pack battery cell, and facilitating the arrangement of other components of the battery device on the width side of the soft-pack battery cell.

[0062] In some embodiments, the reinforcing partition is adhesively connected to the soft-pack battery cell.

[0063] In the above technical solution, the reinforcing partition is connected to the adjacent soft-pack battery cells by bonding, making the connection simple and the fixation reliable. The reinforcing partition can stably exchange heat with the soft-pack battery cells. In addition, the adhesive layer occupies a small space, enabling the reinforcing partition and the soft-pack battery cells to be arranged compactly, so that the overall structure of the battery cell row is more compact and stable, which is conducive to improving the battery energy density.

[0064] In some embodiments, the reinforcing partition is bonded and fixed to the soft-pack battery cells by double-sided adhesive tape.

[0065] In the above technical solution, the reinforcing partition is bonded and fixed to the adjacent soft-pack battery cells by double-sided adhesive tape, which can avoid the problem of colloid overflow, avoid the occupation of space by the overflowing colloid, and eliminate the subsequent process of cleaning the overflowing colloid.

[0066] In some embodiments, the battery cell row includes a plurality of reinforcing partitions arranged along the thickness direction of the soft-pack battery cells. Two reinforcing partitions that are adjacent and arranged along the thickness direction and are located on both sides of at least one soft-pack battery cell in the thickness direction are connected by a connecting plate located in the outer peripheral area of the soft-pack battery cell.

[0067] In the above technical solution, by providing the connecting plate, the reliability of the support of the reinforcing partition for the soft-pack battery cell can be improved, and the setting position of the connecting plate does not interfere with the soft-pack battery cell.

[0068] In some embodiments, the connecting plate is arranged between the two reinforcing partitions it connects and is integrally connected with the two reinforcing partitions it connects to form a U-shaped shell.

[0069] In the above technical solution, the process of connecting the connecting plate and the reinforcing partition can be omitted, and the connection reliability between the connecting plate and the reinforcing partition can be improved.

[0070] In some embodiments, a reinforcing partition is interposed between every two adjacent soft-pack battery cells in the battery cell row.

[0071] In the above technical solution, by providing that a reinforcing partition is interposed between every two adjacent soft-pack battery cells in the battery cell row, each soft-pack battery cell can obtain the support and heat exchange of the reinforcing partition, so that the reliability and performance of the battery cell row can be more fully optimized.

[0072] In some embodiments, a plurality of soft-pack battery cells are interposed between two adjacent reinforcing partitions arranged in the battery cell row.

[0073] In the above technical solution, by providing that no reinforcing partition is provided between the plurality of soft-pack battery cells interposed between two adjacent reinforcing partitions, the number of reinforcing partitions can be reduced, and the usage cost of the reinforcing partitions can be reduced.

[0074] In some embodiments, the number of pouch cells sandwiched between two adjacent reinforcing partitions in the cell row is less than or equal to four.

[0075] In the above technical solution, when there are multiple pouch cells sandwiched between two adjacent reinforcing partitions in the cell row, the number of pouch cells between the two adjacent reinforcing partitions is set to be less than or equal to four, so that the arrangement number of pouch cells between the two adjacent reinforcing partitions is more appropriate, avoiding the problem that the number of pouch cells between the two reinforcing partitions is too large and exceeds the supporting capacity of the reinforcing partitions, and enabling each pouch cell between the two reinforcing partitions to obtain a relatively reliable supporting effect from the two reinforcing partitions.

[0076] In some embodiments, a buffer member is sandwiched between at least two adjacent pouch cells in the cell row, and the stiffness of the buffer member is less than the stiffness of the pouch cell housing.

[0077] In the above technical solution, by providing a buffer member between two adjacent pouch cells, and the stiffness of the buffer member is less than the stiffness of the pouch cell housing, the buffer member can provide an expansion space for the pouch cell, so that the buffer member can well absorb the expansion deformation of the pouch cell and the vibration under external impact, etc., making the overall structural stability of the cell row better.

[0078] In some embodiments, both a buffer member and a reinforcing partition are provided between at least two adjacent pouch cells in the cell row.

[0079] In the above technical solution, when both a buffer member and a reinforcing partition are provided between two adjacent pouch cells, through the cooperation of the reinforcing partition and the buffer member, the two adjacent pouch cells can be effectively separated, which can not only play a buffering role but also a supporting role, improving the reliability of the cell row.

[0080] In some embodiments, the buffer member is sandwiched between two adjacent reinforcing partitions to form a partition group, and the partition group is provided between two adjacent pouch cells.

[0081] In the above technical solution, it is beneficial for both heat dissipation and buffering.

[0082] In some embodiments, at most one of a buffer member and a reinforcing partition is provided between any two adjacent pouch cells in the cell row.

[0083] In the above technical solution, by providing at most one of a buffer member and a reinforcing partition between any two adjacent pouch cells in the cell row, the distance between two adjacent pouch cells can be reduced, the cooperation compactness of adjacent pouch cells can be improved, and it is beneficial to improve the energy density of the battery device. In addition, there is no need to consider the cooperation problem between the reinforcing partition and the buffer member, thus simplifying the assembly.

[0084] In some embodiments, at least one pouch cell in the cell row is clamped between a buffer member and a reinforcing partition.

[0085] In the above technical solution, the pouch cell clamped between the buffer member and the reinforcing partition can not only be supported and heat-exchanged by the reinforcing partition on one side, but also be buffered by the buffer member on the other side, thereby improving the reliability and performance of the pouch cell.

[0086] In some embodiments, the buffer members and the reinforcing partitions in the cell row are alternately arranged.

[0087] In the above technical solution, a buffer member or a reinforcing partition is arranged between two adjacent pouch cells in the cell row, and the buffer members and the reinforcing partitions are alternately arranged, so that the arrangement of the reinforcing partitions and the buffer members in the cell row is more balanced, and each pouch cell in the cell row can obtain stable and reliable support, heat exchange and buffering effects.

[0088] In some embodiments, the buffer member covers more than 80% of the area of the thickness-side surface of the pouch cell; and / or, the buffer member is a foam layer or a silicone layer.

[0089] In the above technical solution, by setting the buffer member to cover more than 80% of the area of the thickness-side surface of the pouch cell, a larger buffer cooperation area can be formed between the pouch cell and the buffer member, thereby improving the buffering effect of the buffer member on the pouch cell, enabling the pouch cell to obtain buffer protection in a larger range, and improving the reliability of the pouch cell. By setting the buffer member as a foam layer or a silicone layer, the buffer member has better absorption ability, and relatively lower weight and cost, which is beneficial to the lightweight and low-cost design of the battery device.

[0090] In some embodiments, buffer members are provided at both ends of the cell row in the thickness direction of the pouch cell, the stiffness of the buffer member is less than the stiffness of the pouch outer shell, and all the pouch cells in the cell row are clamped between the buffer members at both ends.

[0091] In the above technical solution, it is beneficial to heat dissipation and buffering, and can reduce the occupation of space, which is conducive to improving the energy density of the battery device.

[0092] In some embodiments, the pouch cell includes a conductive member, the conductive member is electrically connected to the electrode assembly of the pouch cell and at least partially exposed outside the pouch outer shell; two adjacent pouch cells in the cell row are connected by the conductive member.

[0093] In the above technical solution, by setting two adjacent pouch cells to be connected by the conductive member, the connection of multiple pouch cells in the cell row can be simplified, which is beneficial to realizing the electrical connection of the pouch cells in the battery device.

[0094] In some embodiments, the two conductive members forming the connection are lap-connected, and at least one conductive member is in a bent form.

[0095] In the above technical solution, by setting the two conductive members forming the connection to be lap-connected, the two conductive members can have a larger connection area, so that the connection between the two conductive members is relatively stable and reliable. Moreover, by setting at least one conductive member in a bent form, the two soft-pack battery cells connected by the conductive member can be stacked in the thickness direction. And this connection method can simplify the structure, reduce parts, and improve the assembly efficiency.

[0096] In some embodiments, the two conductive members forming the connection are connected by a transition piece, and the transition piece is in a bent form.

[0097] In the above technical solution, by setting the adjacent soft-pack battery cells in the battery cell row to be connected by a transition piece, and by setting the transition piece in a bent form, the design of the conductive member can be simplified, the length of the conductive member can be shortened, the processing steps and processes of the conductive member during the connection of the soft-pack battery cells can be reduced, the production efficiency can be improved, and the two soft-pack battery cells connected by the conductive member can be stacked in the thickness direction. In addition, a standardized production transition piece can be used for rapid and efficient connection processing, making the connection of multiple soft-pack battery cells more convenient and efficient, and making the production efficiency of the battery cell row higher.

[0098] In some embodiments, conductive members are respectively provided at both ends in the length direction of the soft-pack battery cell, and the conductive members at the adjacent ends in the length direction of two adjacent soft-pack battery cells are connected.

[0099] In the above technical solution, by setting conductive members at both ends in the length direction of the soft-pack battery cell, and connecting the conductive members at the adjacent ends in the length direction of two adjacent soft-pack battery cells, the occupation in the width direction of the soft-pack battery cell can be reduced. When the width direction is vertical, it is beneficial to reduce the occupation of the vertical space, reduce the size of the battery device in the vertical direction, and increase the energy density of the battery device in the vertical direction.

[0100] In some embodiments, the polarities of the two conductive members at both ends in the length direction of the soft-pack battery cell are opposite, and the polarities of the two conductive members forming the connection are the same or opposite.

[0101] In the above technical solution, series connection and / or parallel connection can be achieved as needed, so that the battery device can be flexibly set.

[0102] In some embodiments, the battery cell row includes at least three soft-pack battery cells, and among the two conductive members of the soft-pack battery cell located between two adjacent soft-pack battery cells in the battery cell row, one conductive member is connected to the conductive member on the same side of an adjacent soft-pack battery cell, and the other conductive member is connected to the conductive member on the same side of the other adjacent soft-pack battery cell.

[0103] In the above technical solution, multiple soft-pack battery cells can be arranged in a row along the length direction of the soft-pack battery cell. Each adjacent pair of conductive members is connected, and then the connection part of the conductive members is bent, so that the multiple soft-pack battery cells can be arranged in a column along the thickness direction, thereby simplifying the processing and improving the production efficiency.

[0104] In some embodiments, the battery device includes a box body for loading the battery cell rows. A battery module is provided in the box body. The battery module includes two battery cell rows arranged along the length direction of the soft-pack battery cell. All the soft-pack battery cells in each battery cell row are stacked in sequence along the thickness direction of the soft-pack battery cell; the conductive members on the sides of the two battery cell rows in the same battery module that are close to each other in the length direction of the soft-pack battery cell are connected.

[0105] In the above technical solution, the series connection and / or parallel connection of multiple battery cell rows can be easily achieved, which is beneficial to simplifying the electrical connection within the entire battery device.

[0106] In some embodiments, the battery device includes a box body for loading the battery cell rows. The edge of the reinforcing partition has a connecting portion protruding along the length direction of the soft-pack battery cell. The connecting portion is used to form a connection with the box body and is spaced from the conductive member along the width direction of the soft-pack battery cell.

[0107] In the above technical solution, the space can be fully utilized, the space compactness can be improved, and the space occupied in the width direction of the soft-pack battery cell can be reduced. When the width direction is vertical, it is beneficial to reduce the occupation of the vertical space, reduce the vertical dimension of the battery device, and increase the energy density of the battery device in the vertical direction.

[0108] In some embodiments, the soft-pack outer shell includes two film parts arranged and connected along the thickness direction of the soft-pack battery cell. Both film parts define a receiving groove. The receiving grooves of the two film parts are open in the direction facing each other along the thickness direction of the soft-pack battery cell and jointly form the receiving cavity of the soft-pack outer shell. The electrode assembly of the soft-pack battery cell is arranged in the receiving cavity.

[0109] In the above technical solution, the structure of the soft-pack outer shell is simple and easy to process, which is beneficial to increasing the volume of the soft-pack outer shell, thereby increasing the energy density of the soft-pack battery cell.

[0110] In some embodiments, the wall thickness of the film part is less than or equal to 0.2 mm. The size of the soft-pack battery cell in the thickness direction of the soft-pack battery cell is the first size, and the size of the film part in the thickness direction of the soft-pack battery cell is the second size. The ratio of the second size to the first size is greater than or equal to 0.4 and less than or equal to 0.6, and the first size is greater than or equal to 5 mm and less than or equal to 70 mm.

[0111] In the above technical solution, the volume of the soft package shell in the soft package battery cell accounts for a relatively small proportion and is lighter in mass, so that the volume and mass ratios of the electrode assembly in the soft package battery cell are larger, thereby enabling the energy density of the soft package battery cell to be well improved. Moreover, the soft package battery cell can have a relatively large thickness and a high energy density. At the same volume, compared with multiple soft package battery cells with a relatively thin thickness, the number of soft package battery cells arranged in this embodiment is smaller, so that the proportion of the soft package shell can be reduced, and further, multiple soft package battery cells within the same volume can have a larger energy density. In addition, the arrangement quantity of structural components such as the reinforcing partition plate and the buffer member in the battery device can be reduced, and the arrangement space of the soft package battery cells in the battery device can be increased, thereby enabling the overall energy density of the battery device to be well improved.

[0112] In some embodiments, the two film parts are separate parts and have a sealing edge structure around the soft package battery cell.

[0113] In the above technical solution, a single film part is convenient for processing and can reduce the processing difficulty.

[0114] In some embodiments, the two film parts are integral parts and have a sealing edge structure on one long side and two wide sides among the four sides of the soft package battery cell respectively.

[0115] In the above technical solution, the number of sealing edges can be reduced, and the size of the entire soft package battery cell in the width direction can be reduced, thereby improving the energy density. Moreover, compared with sealing edges around the four sides, the leakage problem caused by poor sealing can be avoided on the side where the sealing edge is omitted, and the reliability of the soft package battery cell can be improved.

[0116] In some embodiments, the battery device includes a box body for loading the battery cell row. The box body includes a top plate and a bottom plate arranged on both sides of the battery cell row along the height direction of the box body. The width direction of the soft package battery cell is consistent with the height direction of the box body, and a structural adhesive is filled between the battery cell row and the bottom plate.

[0117] In the above technical solution, the stiffness of the soft package battery cell along the height direction of the box body can be improved.

[0118] In some embodiments, the structural adhesive is a heat-conducting adhesive.

[0119] In the above technical solution, it is beneficial to the heat dissipation of the soft package battery cell.

[0120] In some embodiments, a glue-blocking strip is arranged in the box body. The bottom plate is located below the battery cell row. A fitting gap is formed between the bottoms of two adjacent soft package battery cells arranged along the thickness direction of the soft package battery cell, and the glue-blocking strip is located between the fitting gap and the bottom plate.

[0121] In the above technical solution, the provided glue-blocking strip can block the overflow of the structural glue between adjacent soft-pack battery cells, reducing the probability of the formation of a hard structure due to glue overflow between adjacent soft-pack battery cells, thereby improving the problem of local stress concentration between adjacent soft-pack battery cells and reducing the risk of damage to the soft-pack battery cells.

[0122] In some embodiments, two adjacent soft-pack battery cells share one glue-blocking strip.

[0123] In the above technical solution, by enabling two adjacent soft-pack battery cells to share one glue-blocking strip, the number of glue-blocking strips can be reduced, which is beneficial to improving the assembly efficiency.

[0124] In some embodiments, the glue-blocking strip is a glue-blocking foam, and the glue-blocking strip is bonded to the bottom plate; or, the glue-blocking strip is a strip with single-sided adhesive, and the glue-blocking strip is bonded to the bottom of the soft-pack battery cell.

[0125] In the above technical solution, the glue-blocking foam has good compressibility. By the extrusion of the soft-pack battery cell on the glue-blocking strip, it can better prevent the overflow of the structural glue between adjacent soft-pack battery cells, and bonding the glue-blocking strip to the bottom plate facilitates the installation and fixation of the glue-blocking strip; or, by setting the glue-blocking strip as a strip with single-sided adhesive, it is convenient to bond the glue-blocking strip to the bottom of the soft-pack battery cell, making the glue-blocking strip and the soft-pack battery cell fixed as a whole, thereby facilitating the improvement of the overall assembly efficiency of the battery device.

[0126] In some embodiments, the reinforcing partition is an inverted T-shaped or L-shaped structure, and includes a first part located between adjacent soft-pack battery cells and a second part located below the soft-pack battery cell, and the second part is located between the bottom of the soft-pack battery cell and the bottom plate.

[0127] In the above technical solution, the second part can be wrapped in the structural glue, so that the bottom of the soft-pack battery cell, the second part and the bottom plate are fixed by the structural glue. In this way, the connection and heat transfer area between the reinforcing partition and the box body can be increased, the rigid support yield can be improved, and when the reinforcing partition is an inverted T-shaped structure, the second part can be separated between the bottoms of adjacent soft-pack battery cells to form a mating gap with the bottom plate, blocking the overflow of the structural glue between adjacent soft-pack battery cells, reducing the probability of the formation of a local hard structure due to glue overflow between adjacent soft-pack battery cells, thereby improving the problem of local stress concentration between adjacent soft-pack battery cells and reducing the risk of damage to the soft-pack battery cells.

[0128] In some embodiments, the soft-pack battery cell is any one of a lithium iron phosphate battery monomer, a ternary battery monomer, and a solid-state battery monomer.

[0129] In the above technical solution, the pouch cell using the above types can provide more choices for the design of the battery device to meet different usage requirements. Among them, the pouch cell is a lithium iron phosphate battery monomer, which has the advantages of high reliability, long cycle life, light weight, large capacity, and small internal resistance; the pouch cell is a ternary battery monomer, which has the advantages of high energy density and good electrochemical performance; the pouch cell is a solid-state battery monomer, which has the advantages of high energy density, high reliability, light weight, and good high and low temperature performance.

[0130] In some embodiments, the pouch cell is a lithium iron phosphate battery monomer, and in the positive electrode material of the pouch cell, the dosage ratio of the positive electrode active material, the binder, and the conductive agent is: 96: 1-3: 1-3; the pouch cell is a ternary battery monomer, and in the positive electrode material of the pouch cell, the dosage ratio of the positive electrode active material, the binder, and the conductive agent is: 96: 2-3: 1-2.

[0131] In the above technical solution, when the pouch cell is a lithium iron phosphate battery monomer, a high proportion of the positive electrode active material means that more substances capable of undergoing electrochemical reactions can be accommodated within a limited electrode assembly, which is beneficial to increasing the capacity and energy density of the battery device, enabling the lithium iron phosphate battery monomer to output higher power while being relatively small in volume and weight, meeting application scenarios with certain requirements for energy density. Using the above ranges for the dosages of the binder and the conductive agent can reduce the cost of auxiliary materials, thereby reducing the overall cost of the battery device. When the pouch cell is a ternary battery monomer, due to the relatively complex structure and surface properties of the ternary material itself, using the above dosage ratios of the positive electrode active material, the binder, and the conductive agent is beneficial to ensuring good adhesion between the positive electrode active material particles and between the active material and the current collector, thereby improving the mechanical stability and integrity of the electrode assembly, reducing the risk of shedding of the active material and electrode pulverization during charge and discharge, and extending the cycle life of the battery device.

[0132] In a second aspect, an embodiment of the present invention further provides an electrical device, including the battery device of any of the above solutions.

[0133] In the above technical solution, since the performance of the battery device is improved, it is beneficial to improve the working power consumption performance of the electrical device. BRIEF DESCRIPTION OF THE DRAWINGS

[0134] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0135] Figure 1 Schematic diagram of the structure of a vehicle provided by some embodiments of the present utility model;

[0136] Figure 2 Schematic diagram of the structure of a battery device provided by some embodiments of the present utility model;

[0137] Figure 3 Schematic diagram after hiding the box cover of the battery device provided by some embodiments of the present utility model;

[0138] Figure 4 Schematic diagram of multiple battery cell rows in the battery device provided by some embodiments of the present utility model;

[0139] Figure 5 Schematic diagram of one battery cell row in the battery device provided by some embodiments of the present utility model;

[0140] Figure 6 For Figure 5 Enlarged view of part A circled in

[0141] Figure 7 For Figure 3 Enlarged view of part B boxed in

[0142] Figure 8 Cross-sectional view of a reinforcing partition provided by some embodiments of the present utility model;

[0143] Figure 9 Schematic diagram of the cooperation between a soft-pack battery cell and a reinforcing partition provided by some embodiments of the present utility model;

[0144] Figure 10 Schematic diagram of multiple battery cell rows provided by some embodiments of the present utility model;

[0145] Figure 11 Partial schematic diagram of a battery cell row provided by some embodiments of the present utility model;

[0146] Figure 12 Partial schematic diagram of a battery cell row provided by other embodiments of the present utility model;

[0147] Figure 13 Schematic diagram of the connection between a battery cell row and a mounting bracket provided by some embodiments of the present utility model;

[0148] Figure 14 For Figure 13 Enlarged view of part C boxed in

[0149] Figure 15 For Figure 4 Enlarged view of part F boxed in

[0150] Figure 16Schematic diagram of a battery device provided by some embodiments of the present utility model;

[0151] Figure 17 is a cross-sectional view along the E-E line shown in Figure 16 ;

[0152] Figure 18 is Figure 17 an enlarged view of part D boxed in

[0153] Figure 19 Schematic diagram of a battery cell row provided by some embodiments of the present utility model;

[0154] Figure 20 is Figure 19 a state diagram of two pouch cells in the battery cell row before being folded in

[0155] Figure 21 Schematic diagram of a pouch cell provided by some embodiments of the present utility model;

[0156] Figure 22 Partial enlarged view of a pouch cell provided by some embodiments of the present utility model;

[0157] Figure 23 is Figure 21 a partial enlarged view of the front projection diagram of the pouch cell shown in

[0158] Figure 24 Partial schematic diagram of a battery device provided by an embodiment of the present utility model;

[0159] Figure 25 Partial schematic diagram of another battery device provided by an embodiment of the present utility model;

[0160] Figure 26 Partial schematic diagram of yet another battery device provided by an embodiment of the present utility model.

[0161] Reference numerals:

[0162] Vehicle 1000;

[0163] Battery device 100; Controller 200; Motor 300;

[0164] Battery cell row 10; First direction F1; Second direction F2; Third direction F3;

[0165] Battery module 101; Upper clearance space S1; Lower clearance space S2;

[0166] Pouch cell 1; Pouch outer shell 11; Film part 111; Sealing edge structure 112;

[0167] Conductive part 12; Adapter piece 13;

[0168] Reinforcing partition 2; cavity 21; heat exchange flow channel 211; reinforcing rib 22; connecting portion 23;

[0169] First part 24; second part 25;

[0170] Buffer member 3; rubber blocking strip 6; connecting plate 6;

[0171] Box body 20;

[0172] Box body main body 7; cover plate 71; bottom plate 711; top plate 712;

[0173] Mounting bracket 8; side wall 81; connecting wall 82;

[0174] Heat exchange plate 9. Specific embodiments

[0175] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts fall within the scope of protection of the present utility model.

[0176] Unless otherwise defined, all technical and scientific terms used in the present utility model have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present utility model belongs; the terms used in the description of the present utility model in the specification are only for the purpose of describing specific embodiments and are not intended to limit the present utility model; the terms "including" and "having" and any variations thereof in the description and claims of the present utility model and the above drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the description and claims of the present utility model or the above drawings are used to distinguish different objects and are not used to describe a specific order or primary-secondary relationship.

[0177] Referring to "embodiments" in the present utility model means that the specific features, structures or characteristics described in connection with the embodiments can be included in at least one embodiment of the present utility model. The phrase appears in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments.

[0178] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "attachment" should be understood in a broad sense. For example, they can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0179] In the present utility model, the term "and / or" is merely a description of the association relationship between associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in the present utility model generally represents an "or" relationship between the front and rear associated objects.

[0180] In the embodiments of the present utility model, the same reference numerals represent the same components. And for the sake of brevity, in different embodiments, the detailed description of the same components is omitted. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present utility model shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device, are only for illustrative purposes and should not constitute any limitation to the present utility model.

[0181] The term "a plurality of" as used in the present utility model means two or more including two.

[0182] At present, from the perspective of the development of the market situation, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydroelectric, thermal, wind and solar power stations, but also widely used in electric transportation such as electric bicycles, electric motorcycles, electric vehicles, as well as in multiple fields such as military equipment and aerospace. With the continuous expansion of the application fields of power batteries, the market demand is also continuously increasing.

[0183] Among the power batteries currently in use, some power batteries use soft-pack battery cells. The soft-pack battery cell includes a soft-pack outer shell and an electrode assembly disposed inside the soft-pack outer shell. The soft-pack outer shell is usually an aluminum-plastic film. Compared with a hard shell (such as a steel shell or an aluminum shell), the aluminum-plastic film is softer. When the soft-pack battery cell expands during charge and discharge operations, or when the soft-pack battery cell is subjected to external extrusion, collision and other mechanical forces, the soft-pack battery cell is prone to deformation and damage, affecting the reliability of the soft-pack battery cell. Moreover, the soft-pack battery cell generates heat during operation. Due to its tight packaging structure and relatively soft outer shell, its heat dissipation performance is poor. In the case of high-rate charge and discharge or continuous operation, heat is easily accumulated inside the soft-pack battery cell, and it is difficult for the soft-pack battery cell to dissipate the heat in a timely and effective manner. Excessive temperature will accelerate the chemical reaction inside the soft-pack battery cell, resulting in the performance degradation of the soft-pack battery cell and shortening the service life of the soft-pack battery cell.

[0184] In addition, in the related art, multiple prismatic cells are directly stacked and installed in the box body of the power battery. However, the adjacent prismatic cells are in direct contact, and the acting force and heat will be directly transferred between the adjacent prismatic cells. Therefore, the deformation and heat generation of a single prismatic cell will affect the adjacent prismatic cells. For example, the expansion of a prismatic cell will squeeze the adjacent prismatic cell to deform, and for another example, the abnormal heat generation of a prismatic cell will cause the temperature of the adjacent prismatic cell to rise, etc., thus forming an expanding influence from a single point to the whole.

[0185] In view of this, the present utility model provides a battery device using prismatic cells. The prismatic cell includes a prismatic outer shell and an electrode assembly disposed inside the prismatic outer shell. The thickness direction of the prismatic cell is the first direction. A plurality of prismatic cells are arranged along the first direction to form a cell row. At least two adjacent prismatic cells in the cell row are clamped with a reinforcing partition. The stiffness of the reinforcing partition is higher than that of the prismatic outer shell, and the reinforcing partition is configured to be able to exchange heat with the corresponding electrode assembly through the prismatic outer shell in contact therewith.

[0186] In this way, by arranging the reinforcing partition between adjacent prismatic cells, it is beneficial to support the prismatic cells, reduce the damage caused by the deformation of the prismatic cells, and thus improve the reliability of the prismatic cells; moreover, it can absorb the heat of the prismatic cells, facilitate the heat dissipation of the prismatic cells, and thus improve the performance and service life of the prismatic cells; and the reinforcing partition can space adjacent prismatic cells to avoid direct contact between adjacent prismatic cells, thereby solving the adverse influence of an abnormality in one of the two prismatic cells on the other on both sides of the reinforcing partition, and thus being beneficial to improving the overall reliability of the battery device.

[0187] The technical solutions described in the embodiments of the present utility model are applicable to battery devices including prismatic cells and electrical devices using the battery devices.

[0188] The electrical device can be a vehicle, a mobile phone, a portable device, a laptop computer, a ship, a spacecraft, an electric toy, and an electric tool, etc. The vehicle can be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle, or an extended-range electric vehicle, etc.; the spacecraft includes an airplane, a rocket, a space shuttle, and a spaceship, etc.; the electric toy includes a fixed or mobile electric toy. For example, a game console, an electric vehicle toy, an electric ship toy, and an electric airplane toy, etc.; the electric tool includes a metal cutting electric tool, a grinding electric tool, an assembly electric tool, and a railway electric tool. For example, an electric drill, an electric grinding wheel, an electric wrench, an electric screwdriver, a hammer drill, an impact electric drill, a concrete vibrator, and a planer, etc. The embodiments of the present utility model do not make special restrictions on the above electrical devices.

[0189] For the convenience of description, the following embodiments take the electrical device as a vehicle as an example for description.

[0190] Please refer to Figure 1 , Figure 1 , which is a schematic structural diagram of a vehicle 1000 provided in some embodiments of the present invention. The vehicle 1000 is provided with a battery device 100, and the battery device 100 can be arranged at the bottom, head, tail, etc. of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000. For example, the battery device 100 can be used as an operating power source of the vehicle 1000.

[0191] The vehicle 1000 may further include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300. For example, it is used for the working power requirements during the start, navigation, and driving of the vehicle 1000. In some embodiments of the present invention, the battery device 100 can not only be used as an operating power source of the vehicle 1000, but also be used as a driving power source of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0192] Please refer to Figure 2 and Figure 3 , Figure 2 , which is a schematic structural diagram of the battery device 100 provided in some embodiments of the present invention. Figure 3 , which is a schematic diagram of the battery device 100 with the cover plate 71 of the hidden box body 20 in some embodiments of the present invention. As shown in Figure 2 and Figure 3 , the battery device 100 may include a box body 20 and a soft-pack battery cell 1 arranged in the box body 20. There are multiple soft-pack battery cells 1, and the multiple soft-pack battery cells 1 can be connected in series, parallel, or in a mixed connection. The mixed connection means that there are both series and parallel connections among the multiple soft-pack battery cells 1. The multiple soft-pack battery cells 1 can be directly connected in series, parallel, or in a mixed connection together, and then the whole formed by the multiple soft-pack battery cells 1 is accommodated in the box body 20; of course, it can also be that multiple soft-pack battery cells 1 are first connected in series, parallel, or in a mixed connection to form a battery module, and then multiple battery modules are connected in series, parallel, or in a mixed connection to form a whole and are accommodated in the box body 20.

[0193] Please continue to refer to Figure 2 and Figure 3 , and in combination with Figure 4 and Figure 5 , Figure 4 , which is a schematic diagram of multiple battery cell rows 10 in the battery device 100 provided in some embodiments of the present invention. Figure 5 , which is a schematic diagram of one battery cell row 10 in the battery device 100 provided in some embodiments of the present invention. The battery device 100 includes: a battery cell row 10 and a box body 20; the battery cell row 10 is adhesively arranged in the box body 20, and the battery cell row 10 includes multiple soft-pack battery cells 1 stacked along the thickness direction.

[0194] Among them, "the battery cell row 10 is adhesively disposed in the box body 20" means that the battery cell row 10 is disposed in the box body 20, and the battery cell row 10 is adhesively connected to the box body 20. For example, it can be connected by structural adhesive, double-sided adhesive, etc.

[0195] Among them, "the battery cell row 10 includes a plurality of pouch cells 1 stacked along the thickness direction" means that at least some of the pouch cells 1 in the battery cell row 10 are stacked along the thickness direction of the pouch cell 1. For example, all the pouch cells 1 in the battery cell row 10 can be stacked along the thickness direction of the pouch cell 1; or for another example, some of the pouch cells 1 in the battery cell row 10 can be stacked along the thickness direction of the pouch cell 1.

[0196] Exemplarily, the battery cell row 10 can include at least one battery cell column, and each battery cell column includes a plurality of pouch cells 1 stacked along the thickness direction of the pouch cell 1.

[0197] Exemplarily, the battery cell row 10 can include a plurality of battery cell groups, and the plurality of battery cell groups are stacked along the thickness direction of the pouch cell 1. Each battery cell group includes one or a plurality of pouch cells 1 arranged flatly along a direction perpendicular to the thickness direction of the pouch cell 1 (for example, along the length direction or width direction of the pouch cell 1).

[0198] Thus, by setting the box body 20 and the battery cell row 10 to be adhesively connected, on the one hand, the connection between the box body 20 and the battery cell row 10 is simplified, the production efficiency of the battery device 100 is improved, on the other hand, the introduction of parts can be saved, the cost is reduced, the connection process is simplified, and the space occupation in the box body 20 is reduced, thereby facilitating the improvement of the energy density of the battery device 100.

[0199] Please continue to refer to Figure 5 and in combination with Figure 6 and Figure 7 , Figure 6 is Figure 5 an enlarged view of part A circled in Figure 7 is Figure 3 an enlarged view of part B boxed in . A reinforcing partition 2 is provided between the large surfaces of at least two adjacent pouch cells 1 in the battery cell row 10. The reinforcing partition 2 is connected to the box body 20. The rigidity of the reinforcing partition 2 is greater than the rigidity of the pouch outer shell 11 of the pouch cell 1, and the reinforcing partition 2 exchanges heat with the pouch cell 1.

[0200] Among them, "the large surface of the pouch cell 1" refers to: the two side surfaces in the thickness direction of the pouch cell 1 (for example, the first direction F1 shown in the figure). That the two pouch cells 1 are stacked along the thickness direction of the pouch cell 1 means that the thickness directions of the two pouch cells 1 are the same, and the two pouch cells 1 are arranged along the thickness direction of the pouch cell 1, so that the two pouch cells 1 are arranged in a large-surface-to-large-surface manner.

[0201] Between the large surfaces of at least two adjacent pouch cells 1 in the cell row 10, a reinforcing partition 2 is provided. That is to say, a reinforcing partition 2 can be interposed between the large surfaces of every two adjacent pouch cells 1, or some adjacent pouch cells 1 may have a reinforcing partition 2 interposed between their large surfaces, while there is no reinforcing partition 2 interposed between the large surfaces of the remaining adjacent pouch cells 1.

[0202] It can be understood that the outer shell of the pouch cell 1 is a soft-pack outer shell 11. The pouch cell 1 includes a soft-pack outer shell 11 and an electrode assembly disposed within the soft-pack outer shell 11. The electrode assembly may include positive and negative electrode plates. The material of the soft-pack outer shell 11 is not limited. For example, it can be an aluminum-plastic film, etc. Among them, "the heat exchange between the reinforcing partition 2 and the pouch cell 1" means that the reinforcing partition 2 is configured to be able to perform heat exchange with the electrode assembly within the pouch cell 1 through the soft-pack outer shell 11 in contact therewith. That is to say, the reinforcing partition 2 can form heat exchange with the electrode assembly within the soft-pack outer shell 11 with which it is in contact. It can be understood that the intermediate medium for heat transfer between the reinforcing partition 2 and the electrode assembly includes but is not limited to the soft-pack outer shell 11. For example, it can be the soft-pack outer shell 11 and the electrolyte (in solid or liquid form).

[0203] Thus, on the one hand, by utilizing the characteristic that the stiffness of the reinforcing partition 2 is greater than that of the soft-pack outer shell 11, the reinforcing partition 2 can improve the deformation problem of the pouch cell 1 and enhance the reliability of the pouch cell 1. On the other hand, by utilizing the heat transfer characteristic of the reinforcing partition 2, the reinforcing partition 2 can also play the role of dissipating heat and equalizing the temperature of the pouch cell 1, optimizing the performance and service life of the pouch cell 1. Thirdly, by interposing the reinforcing partition 2 between adjacent pouch cells 1, the mutual influence between the adjacent pouch cells 1 on both sides of the reinforcing partition 2 can be reduced, such as the influence of force or heat, thereby improving the overall reliability of the battery device 100.

[0204] Among them, the connection method and connection position of "the reinforcing partition 2 is connected to the box body 20" are not limited. For example, the connection method can be direct or indirect connection, can be detachable connection, or can be non-detachable fixed connection. The connection position can be at least one of the top, side, and bottom of the box body 20.

[0205] Thus, by setting the connection between the reinforcing partition 2 and the box body 20, the fixing of the reinforcing partition 2 can be realized, enabling the reinforcing partition 2 to effectively support the pouch cell 1, improving the stiffness of the cell row 10, and thus enhancing the overall stiffness of the battery device 100. In addition, by setting the heat exchange between the reinforcing partition 2 and the pouch cell 1 and connecting the reinforcing partition 2 to the box body 20, a heat conduction path for heat exchange can also be formed at the connection between the reinforcing partition 2 and the box body 20. Therefore, it is beneficial for the pouch cell 1 to transfer heat to the box body 20 through the reinforcing partition 2, improving the heat dissipation efficiency of the pouch cell 1.

[0206] In some embodiments, referring to Figure 7 , the thickness T1 of the reinforcing partition 2 is less than the thickness T2 of the pouch cell 1.

[0207] In the above technical solution, by setting the thickness of the reinforcing partition 2 to be less than the thickness of the pouch cell 1, the occupation of the space inside the box body 20 by the reinforcing partition 2 can be reduced, which is beneficial to improving the energy density of the battery device 100.

[0208] Exemplarily, the thickness of the reinforcing partition 2 is 0.8 mm to 2.0 mm. For example, the thickness of the reinforcing partition 2 can be 0.8 mm, 0.9 mm, 1 mm, 1.3 mm, 1.5 mm, 2 mm, etc.

[0209] In the above technical solution, by setting the thickness of the reinforcing partition 2 to be 0.8 mm to 2.0 mm, the reinforcing partition 2 is not too small and can have good support strength to stably and reliably support the pouch cell 1, and at the same time, the thickness of the reinforcing partition 2 is not too large, so that the occupation of the space by the reinforcing partition 2 can be reduced, that is, the reinforcing partition 2 can reduce the occupation of the space while meeting the support requirements, which is beneficial to improving the energy density of the battery device 100.

[0210] It should be noted that the material of the reinforcing partition 2 is not limited. For example, the reinforcing partition 2 is a metal plate, that is, it is processed from a metal material. Thus, by using a metal material to process the reinforcing partition 2, the reinforcing partition 2 can have sufficient support ability even when the thickness is small, and can also have good heat conduction performance, which is beneficial to the reliable support of the pouch cell 1 by the reinforcing partition 2 and rapid heat exchange.

[0211] Exemplarily, when the reinforcing partition 2 is a metal plate, the reinforcing partition 2 can be an aluminum plate, an aluminum alloy plate, a copper plate or a steel plate, etc. These materials have low cost and are easy to obtain, and can have good support strength and heat exchange performance at a relatively thin thickness.

[0212] Of course, the present invention is not limited thereto, and the reinforcing partition 2 can also be made of other materials with good heat conduction performance, such as ceramic materials with high strength, heat-conducting plastics, carbon materials, etc.

[0213] In some embodiments, the reinforcing partition 2 is a solid structure. That is, the reinforcing partition 2 is not in a hollow form, or there are no structures such as holes, flow channels or cavities 21 of any form on the reinforcing partition 2 (however, pores in the material itself can exist).

[0214] In the above technical solution, by setting the reinforcing partition 2 as a solid structure, that is, in the form of a solid plate, the reinforcing partition 2 can have better strength, improve the support reliability for the soft-pack battery cell 1, enable the soft-pack battery cell 1 to obtain more stable and reliable support, and is more conducive to improving the problem of force transmission between adjacent soft-pack battery cells 1 (referring to the soft-pack battery cells 1 on both sides of the reinforcing partition 2), and reduce the extrusion between adjacent soft-pack battery cells 1 (referring to the soft-pack battery cells 1 on both sides of the reinforcing partition 2).

[0215] In some embodiments, referring to Figure 8 , Figure 8 is a cross-sectional view of the reinforcing partition 2 provided in some embodiments of the present invention; a cavity 21 is formed inside the reinforcing partition 2. That is to say, the reinforcing partition 2 is not a solid structure. It should be noted that the cavity 21 can be filled with a medium or not filled with a medium. When filled with a medium, a buffer medium for absorbing force can be filled, or a heat-transfer medium for absorbing heat can be filled, etc.

[0216] In the above technical solution, by arranging the cavity 21 inside the reinforcing partition 2, the reinforcing partition 2 can utilize the cavity 21 to absorb the expansion force of the soft-pack battery cell 1, that is, provide an expansion space, and avoid the problem of excessive extrusion of the soft-pack battery cell 1 when the soft-pack battery cell 1 expands too much, thereby improving the reliability of the battery cell row 10. Moreover, when the battery cell row 10 is subjected to some collisions, the cavity 21 can be used to absorb the collision force and protect the soft-pack battery cell 1.

[0217] In some embodiments, referring to Figure 6 and Figure 8 , the cavity 21 includes a heat-exchange flow channel 211 for arranging a heat-exchange medium. That is to say, there are some cavities 21 in which the heat-exchange medium can flow or be stored. At this time, the reinforcing partition 2 can perform heat exchange with the soft-pack battery cell 1 by using its own material, or can perform heat exchange with the soft-pack battery cell 1 through the heat-exchange medium in the heat-exchange flow channel 211, or can simultaneously use the material of the reinforcing partition 2 itself and the heat-exchange medium in the heat-exchange flow channel 211 to perform heat exchange with the soft-pack battery cell 1 at the same time, so as to realize the flexible design of the reinforcing partition 2.

[0218] In the above technical solution, the reinforcing partition 2 can perform heat exchange with the soft-pack battery cell 1 by using the heat-exchange medium in the heat-exchange flow channel 211. By selecting and controlling the heat-exchange medium, the heat management performance of the reinforcing partition 2 for the soft-pack battery cell 1 can be optimized. In addition, the heat-exchange flow channel 211 can be connected to an external heat management system, so that the heat-exchange medium can circulate and be controlled to adjust the temperature. At this time, the reinforcing partition 2 can integrate the liquid-cooling heat-exchange function, reduce the additional heat-exchange structure, thereby simplifying the battery device 100, reducing the number of components, and improving the energy density of the battery device 100.

[0219] In some embodiments, referring toFigure 6 and Figure 8 The heat exchange flow channel 211 penetrates from one length end of the reinforcing partition plate 2 to the other length end of the reinforcing partition plate 2. That is, the heat exchange flow channel 211 penetrates through the reinforcing partition plate 2, and both ends of the heat exchange flow channel 211 in the length direction of the reinforcing partition plate 2 form openings respectively. In this way, the heat exchange medium can enter the heat exchange flow channel 211 through the opening on one side, then flow through the entire length range of the reinforcing partition plate 2, and flow out of the heat exchange flow channel 211 from the opening on the other side. Thus, by setting the heat exchange flow channel 211 to penetrate from one length end of the reinforcing partition plate 2 to the other length end of the reinforcing partition plate 2, the heat exchange performance of the reinforcing partition plate 2 with the soft package battery cell 1 in the entire length direction can be improved.

[0220] It should be noted that the extending direction of the heat exchange flow channel 211 is not limited. For example, it can extend along a straight line parallel to the length direction of the reinforcing partition plate 2, so as to facilitate the processing of the reinforcing partition plate 2, such as extrusion molding. Or in other embodiments, the heat exchange flow channel 211 can also extend along an oblique line inclined to the length direction of the reinforcing partition plate 2, or the heat exchange flow channel 211 can also extend along a wavy line or a zigzag line, etc. At this time, the reinforcing partition plate 2 can be processed by splicing or other methods.

[0221] In some embodiments, referring to Figure 8 , reinforcing ribs 22 are provided in the cavity 21. It should be noted that the setting position, shape, etc. of the reinforcing ribs 22 are not limited, and can be specifically set according to the support requirements.

[0222] In the above technical solution, by providing the reinforcing ribs 22 in the cavity 21, while the cavity 21 exists in the reinforcing partition plate 2, the reinforcing partition plate 2 can have better support strength, improve the support reliability of the reinforcing partition plate 2 for the soft package battery cell 1, and at the same time, while ensuring the support reliability, the weight of the reinforcing partition plate 2 can be reduced, the material cost of the reinforcing partition plate 2 can be reduced, and the light weight and low cost of the battery device 100 can be realized.

[0223] Referring to Figure 9 , Figure 9 is a schematic diagram of the cooperation between the soft package battery cell 1 and the reinforcing partition plate 2 provided by some embodiments of the present utility model.

[0224] In some embodiments, the length direction of the reinforcing partition 2 extends along the length direction of the soft-pack battery cell 1, that is, the length direction of the reinforcing partition 2 is the same as the length direction of the soft-pack battery cell 1, and the thickness direction of the reinforcing partition 2 is the same as the thickness direction of the soft-pack battery cell 1. Therefore, the width direction of the reinforcing partition 2 is also the same as the width direction of the soft-pack battery cell 1. The thickness direction of the soft-pack battery cell 1 is the first direction F1, the length direction of the soft-pack battery cell 1 is the second direction F2, and the width direction of the soft-pack battery cell 1 is the third direction F3. Thus, while not occupying much space, the reinforcing partition 2 can cover the soft-pack battery cell 1 to a large extent, improving the support and heat exchange effects on the soft-pack battery cell 1.

[0225] Exemplarily, referring to Figure 9 , the length L2 of the reinforcing partition 2 is greater than 80% of the length L1 of the soft-pack battery cell 1. Herein, the "length of the soft-pack battery cell 1" refers to the length of the main body part of the soft-pack battery cell 1, and this main body part does not include the part of the soft-pack battery cell 1 that extends outside the soft-pack outer shell 11 (such as the part of the conductive member 12 that extends outside the soft-pack outer shell 11 as described later). For example, the length L2 of the reinforcing partition 2 is greater than 80%, 81%, 82%, 84%, 85%, 90%, 100%, 120%, 150%, 170%, 200%, 210%, 220%, 230%, 240%, etc. of the length L1 of the soft-pack battery cell 1.

[0226] In the above technical solution, by setting the length L2 of the reinforcing partition 2 to be greater than 80% of the length L1 of the soft-pack battery cell 1, the soft-pack battery cell 1 and the reinforcing partition 2 can have a relatively large heat transfer surface and support surface in the length direction of the soft-pack battery cell 1, enabling the reinforcing partition 2 to cover a relatively large part of the area in the length direction of the soft-pack battery cell 1, and enabling the reinforcing partition 2 to have a good support, heat transfer, and separation effect on the soft-pack battery cell 1.

[0227] Exemplarily, referring to Figure 9 , the width W2 of the reinforcing partition 2 is greater than 80% of the width W1 of the soft-pack battery cell 1. Herein, the "width of the soft-pack battery cell 1" refers to the width of the main body part of the soft-pack battery cell 1, and this main body part does not include the part of the soft-pack battery cell 1 that extends outside the soft-pack outer shell 11 (such as the part of the conductive member 12 that extends outside the soft-pack outer shell 11 as described later). For example, the width W2 of the reinforcing partition 2 is greater than 80%, 81%, 82%, 84%, 85%, 90%, 100%, etc. of the width W1 of the soft-pack battery cell 1.

[0228] In the above technical solution, by setting the width W2 of the reinforcing partition 2 to be greater than 80% of the width W1 of the soft-pack battery cell 1, a relatively large heat transfer surface and support surface can be provided between the soft-pack battery cell 1 and the reinforcing partition 2 in the width direction of the soft-pack battery cell 1, so that the reinforcing partition 2 can cover a relatively large part of the area in the width direction of the soft-pack battery cell 1, and the reinforcing partition 2 can provide good support, heat transfer and separation effects on the soft-pack battery cell 1.

[0229] Exemplarily, referring to Figure 9 , the length L2 of the reinforcing partition 2 is greater than 80% of the length L1 of the soft-pack battery cell 1. At the same time, the width W2 of the reinforcing partition 2 is greater than 80% of the width W1 of the soft-pack battery cell 1. Thus, the reinforcing partition 2 can cover a relatively large area of the soft-pack battery cell 1 in both the length direction and the width direction of the soft-pack battery cell 1, and the reinforcing partition 2 can provide good support, heat transfer and separation effects on the soft-pack battery cell 1.

[0230] In some embodiments, referring to Figure 10 , Figure 10 is a schematic diagram of a plurality of battery cell rows 10 provided in some embodiments of the present invention. A plurality of adjacent battery cell rows 10 arranged along the length direction of the soft-pack battery cell 1 share the reinforcing partition 2. For example, two, three, or four battery cell rows 10 can be arranged along the length direction of the soft-pack battery cell 1.

[0231] In the above technical solution, by arranging two battery cell rows 10 along the length direction of the soft-pack battery cell 1, it is beneficial to improve the energy density of the battery device 100. And compared with the solution of using a single long soft-pack battery cell, in this embodiment, the length of a single soft-pack battery cell 1 can be reduced, thereby reducing the processing difficulty of a single soft-pack battery cell 1. Moreover, by sharing the reinforcing partition 2, the number of arrangements of the reinforcing partition 2 can be reduced, and the stability of the overall structure can be improved.

[0232] Exemplarily, referring to Figure 10 , the length L2 of the reinforcing partition 2 is greater than twice the length L1 of the soft-pack battery cell 1, so that two adjacent battery cell rows 10 arranged along the length direction of the soft-pack battery cell 1 (for example, the second direction F2 shown in the figure) share the reinforcing partition 2. For example, the length L2 of the reinforcing partition 2 is greater than 2.1 times, 2.2 times, 2.3 times, 2.4 times, 2.5 times, 2.6 times, etc. of the length L1 of the soft-pack battery cell 1.

[0233] In the above technical solution, by setting the length of the reinforcing partition plate 2 to be greater than twice the length of the soft-pack battery cell 1, two adjacent battery cell rows 10 arranged along the length direction of the soft-pack battery cell 1 share the reinforcing partition plate 2, so that the reinforcing partition plate 2 can support two soft-pack battery cells 1 arranged adjacent to each other along the length direction of the soft-pack battery cell 1 at the same time, and the reinforcing partition plate 2 shared in the length direction of the soft-pack battery cell 1 can support and heat exchange each soft-pack battery cell 1 in a relatively large range and more effectively and sufficiently.

[0234] Of course, the present invention is not limited to this, and at least three adjacent battery cell rows 10 arranged along the length direction of the soft-pack battery cell 1 (such as the second direction F2) can also be set to share the reinforcing partition plate 2. At this time, the length of the reinforcing partition plate 2 can be correspondingly lengthened, which will not be elaborated here.

[0235] In some embodiments, referring to Figure 9 , the width W1 of the reinforcing partition plate 2 is less than the width W2 of the soft-pack battery cell 1.

[0236] Thus, by setting the width of the reinforcing partition plate 2 to be less than the width of the soft-pack battery cell 1, the reinforcing partition plate 2 is not easily extended beyond the soft-pack battery cell 1 in the width direction, avoiding occupying the space in the width direction of the soft-pack battery cell 1, which is beneficial to arranging other components of the battery device 100, such as the heat exchange plate 9 described later, on the width side of the soft-pack battery cell 1.

[0237] In addition, when the width W1 of the reinforcing partition plate 2 is limited to be less than the width W2 of the soft-pack battery cell 1, and at the same time the width W2 of the reinforcing partition plate 2 is limited to be greater than 80% of the width W1 of the soft-pack battery cell 1, the reinforcing partition plate 2 can not only effectively support and heat exchange the soft-pack battery cell 1, but also reduce unnecessary space occupation.

[0238] In some embodiments, the reinforcing partition plate 2 is adhesively connected to the soft-pack battery cell 1. For example, the reinforcing partition plate 2 can be adhesively fixed to the soft-pack outer shell 11 of the adjacent soft-pack battery cell 1, and the adhesive method is not limited. For example, it can be adhesively bonded by applying glue or double-sided tape, etc.

[0239] Thus, the reinforcing partition plate 2 is adhesively connected to the adjacent soft-pack battery cell 1, making the connection simple and the fixation reliable, and the reinforcing partition plate 2 can stably exchange heat with the soft-pack battery cell 1. In addition, the adhesive layer occupies a small space, enabling the reinforcing partition plate 2 and the soft-pack battery cell 1 to be compactly arranged, so that the overall structure of the battery cell row 10 is more compact and stable, which is beneficial to improving the battery energy density.

[0240] Exemplarily, the reinforcing partition 2 and the soft-pack battery cell 1 are adhesively fixed by double-sided tape. For example, when assembling the battery cell row 10, double-sided tape can be provided between the soft-pack battery cell 1 and the reinforcing partition 2. For example, the double-sided tape can be first adhesively fixed to one of the soft-pack battery cell 1 and the reinforcing partition 2, and then adhered to the other, so as to realize the adhesive fixation of the soft-pack battery cell 1 and the reinforcing partition 2 by double-sided tape.

[0241] Thus, the reinforcing partition 2 and the adjacent soft-pack battery cell 1 are adhesively fixed by double-sided tape, which can avoid the problem of colloid overflow, avoid the occupation of space by the overflowing colloid, and eliminate the subsequent process of cleaning the overflowing colloid. Of course, if the problem of colloid overflow can be well controlled and the uniformity of the arrangement of the thermal conductive adhesive can be well controlled, the soft-pack battery cell 1 and the reinforcing partition 2 can also be arranged to be adhesively connected by the thermal conductive adhesive.

[0242] In some embodiments, in combination with Figure 24 , the battery cell row 10 includes a plurality of reinforcing partitions 2 arranged along the thickness direction of the soft-pack battery cell 1. Two reinforcing partitions 2 that are adjacent and arranged along the thickness direction of the soft-pack battery cell 1 and are disposed on both sides of at least one soft-pack battery cell 1 in the thickness direction of the soft-pack battery cell 1 are connected by a connecting plate 6 located in the outer peripheral region of the soft-pack battery cell 1.

[0243] Thus, by providing the connecting plate 6, the reliability of the support of the reinforcing partition 2 for the soft-pack battery cell 1 can be improved, and the installation position of the connecting plate 6 does not interfere with the soft-pack battery cell 1.

[0244] For example, the second direction F2 can be the length direction of the soft-pack battery cell 1, the third direction F3 can be the width direction of the soft-pack battery cell 1, and the first direction F1 is the thickness direction of the soft-pack battery cell 1. Both sides in the width direction and both sides in the length direction of the soft-pack battery cell 1 belong to the outer peripheral region of the soft-pack battery cell 1. The connecting plate 6 can be set at any of these positions. For example, the connecting plate 6 can be provided on one side in the width direction of the soft-pack battery cell 1, so as to form an avoidance with the connecting portion 23 described later.

[0245] Among them, every two adjacent reinforcing partitions 2 can be connected by the connecting plate 6, or some adjacent two reinforcing partitions 2 are connected by the connecting plate 6, and some adjacent two reinforcing partitions 2 are not connected by the connecting plate 6. Among them, the reinforcing partition 2 and the connecting plate 6 can be assembled and connected, or integrally formed.

[0246] For example, in some embodiments, the connecting plate 6 is provided between the two reinforcing partitions 2 it connects and is integrally connected with the two reinforcing partitions 2 it connects to form a U-shaped shell. Thus, the process of connecting the connecting plate 6 and the reinforcing partition 2 can be omitted, and the connection reliability between the connecting plate 6 and the reinforcing partition 2 can be improved.

[0247] In some embodiments, a reinforcing partition 2 is interposed between every two adjacent pouch cells 1 in the cell row 10. Thus, by arranging the reinforcing partition 2 between every two adjacent pouch cells 1 in the cell row 10, each pouch cell 1 can obtain the support and heat exchange of the reinforcing partition 2, so that the reliability and performance of the cell row 10 can be more fully optimized.

[0248] In some embodiments, a plurality of pouch cells 1 are interposed between two adjacent reinforcing partitions 2 arranged adjacent to each other in the cell row 10. For example, when the plurality of pouch cells 1 in the cell row 10 are arranged along the first direction F1, a plurality of pouch cells 1 are interposed between two adjacent reinforcing partitions 2 arranged adjacent to each other along the first direction F1. That is, no reinforcing partition 2 is arranged between the plurality of pouch cells 1 interposed between two adjacent reinforcing partitions 2. In this way, it is not the case that a reinforcing partition 2 is interposed between every two adjacent pouch cells 1 in the cell row 10. In the above technical solution, the number of reinforcing partitions 2 can be reduced, and the usage cost of the reinforcing partitions 2 can be lowered.

[0249] Exemplarily, when a plurality of pouch cells 1 are interposed between two adjacent reinforcing partitions 2 arranged adjacent to each other in the cell row 10, the number of pouch cells 1 interposed between two adjacent reinforcing partitions 2 arranged adjacent to each other in the cell row 10 can be less than or equal to four. For example, when the plurality of pouch cells 1 in the cell row 10 are arranged along the first direction F1, the number of pouch cells 1 interposed between two adjacent reinforcing partitions 2 arranged adjacent to each other along the first direction F1 can be less than or equal to four. For example, the number of pouch cells 1 interposed between two adjacent reinforcing partitions 2 arranged adjacent to each other along the first direction F1 can be four, three or two.

[0250] Thus, by setting the number of pouch cells 1 between two adjacent reinforcing partitions 2 to be less than or equal to four, the arrangement number of pouch cells 1 between two adjacent reinforcing partitions 2 is more appropriate, avoiding the problem that the number of pouch cells 1 between two reinforcing partitions 2 is too large and exceeds the support capacity of the reinforcing partition 2, so that each pouch cell 1 between two reinforcing partitions 2 can obtain a relatively reliable support effect from the two reinforcing partitions 2.

[0251] In some embodiments, please refer to again Figure 6 , a buffer member 3 is interposed between at least two adjacent pouch cells 1 in the cell row 10, and the stiffness of the buffer member 3 is less than the stiffness of the pouch cell housing 11.

[0252] Thus, by arranging the buffer member 3 between two adjacent pouch cells 1 and the stiffness of the buffer member 3 being less than the stiffness of the pouch cell housing 11, the buffer member 3 can provide an expansion space for the pouch cell 1, so that the buffer member 3 can well absorb the expansion deformation of the pouch cell 1 and the vibration under external impact, etc., making the overall structural stability of the cell row 10 better.

[0253] Among them, the material of the buffer member 3 is not limited. For example, it can be a foam layer or a silica gel layer, etc. The buffer member 3 made of these materials has better absorption capacity, and relatively low weight and cost, which is beneficial to the lightweight and low-cost design of the battery device 100.

[0254] Exemplarily, the soft-pack battery cell 1 and the buffer member 3 can be adhesively fixed or abutted and fitted. For example, they can be adhesively fixed by applying glue or double-sided tape. When using double-sided tape for adhesive fixation, the problem of glue overflow can be avoided. Of course, if the problem of glue overflow can be controlled and the layout uniformity of the thermal conductive glue can be controlled, the soft-pack battery cell 1 and the buffer member 3 can also be arranged to be adhesively fixed by the thermal conductive glue.

[0255] In some embodiments, referring to Figure 11 Figure 11 is a partial schematic view of the battery cell row 10 provided by some embodiments of the present utility model; between at least two adjacent soft-pack battery cells 1 in the battery cell row 10, there are simultaneously provided a buffer member 3 and a reinforcing partition 2. For example, it can be that between every two adjacent soft-pack battery cells 1 in the battery cell row 10, there are simultaneously provided a buffer member 3 and a reinforcing partition 2. Or, for another example, it can also be that between some adjacent soft-pack battery cells 1 in the battery cell row 10, there are simultaneously provided a buffer member 3 and a reinforcing partition 2, and between the remaining adjacent soft-pack battery cells 1, there is at most one of the buffer member 3 and the reinforcing partition 2.

[0256] In the above technical solution, when there are simultaneously provided a buffer member 3 and a reinforcing partition 2 between two adjacent soft-pack battery cells 1, through the cooperation of the reinforcing partition 2 and the buffer member 3, the two adjacent soft-pack battery cells 1 can be effectively separated, which can not only play a buffering role but also a supporting role, improving the reliability of the battery cell row 10. Exemplarily, the reinforcing partition 2 and the buffer member 3 can be adhesively fixed or abutted and fitted.

[0257] When there are simultaneously provided a buffer member 3 and a reinforcing partition 2 between two adjacent soft-pack battery cells 1, the buffer member 3 is clamped between two adjacent reinforcing partitions 2 to form a partition group, and the partition group is arranged between two adjacent soft-pack battery cells 1. In this way, it can better ensure that the soft-pack battery cells 1 on both sides of the buffer member 3 also have good heat dissipation.

[0258] In some embodiments, referring to Figure 12 Figure 12 is a partial schematic view of the battery cell row 10 provided by other embodiments of the present utility model; between any two adjacent soft-pack battery cells 1 in the battery cell row 10, there is at most one of a buffer member 3 and a reinforcing partition 2. That is to say, between any two adjacent soft-pack battery cells 1 in the battery cell row 10, there can be only a buffer member 3, or only a reinforcing partition 2, or neither a buffer member 3 nor a reinforcing partition 2 is provided. In other words, the buffer member 3 and the reinforcing partition 2 cannot be simultaneously provided between two adjacent soft-pack battery cells 1.

[0259] In the above technical solution, by providing at most one of the buffer member 3 and the reinforcing partition 2 between any two adjacent pouch cells 1 in the cell row 10, the distance between two adjacent pouch cells 1 can be reduced, the cooperation compactness of the adjacent pouch cells 1 can be improved, and it is beneficial to increase the energy density of the battery device 100. In addition, there is no need to consider the cooperation problem between the reinforcing partition 2 and the buffer member 3, thus simplifying the assembly.

[0260] In some embodiments, referring to Figure 12 , at least one pouch cell 1 in the cell row 10 is clamped between the buffer member 3 and the reinforcing partition 2. That is to say, one or more pouch cells 1 in the cell row 10 can be clamped between the buffer member 3 and the reinforcing partition 2.

[0261] In the above technical solution, the pouch cell 1 clamped between the buffer member 3 and the reinforcing partition 2 can not only be supported and heat-exchanged by the reinforcing partition 2 on one side, but also be buffered by the buffer member 3 on the other side, thereby improving the reliability and performance of the pouch cell 1.

[0262] It should be noted that the arrangement manners of the reinforcing partition 2 and the buffer member 3 in the cell row 10 can be flexibly and conveniently selected, so that the buffer member 3 and the reinforcing partition 2 can well support, heat-exchange and buffer each pouch cell 1 in the cell row 10, thereby improving the reliability of the battery device 100.

[0263] Exemplarily, referring to Figure 12 , the buffer member 3 and the reinforcing partition 2 in the cell row 10 are alternately arranged. For example, when multiple pouch cells 1 in the cell row 10 are arranged along the thickness direction of the pouch cell 1, the buffer member 3 and the reinforcing partition 2 are alternately arranged along the thickness direction of the pouch cell 1. That is, in the thickness direction of the pouch cell 1, each pouch cell 1 in the cell row 10 is clamped between the buffer member 3 and the reinforcing partition 2, and one reinforcing partition 2 is provided between two adjacent buffer members 3, and one buffer member 3 is provided between two adjacent reinforcing partitions 2.

[0264] Thus, a buffer member 3 or a reinforcing partition 2 is arranged between two adjacent pouch cells 1 in the cell row 10, and the buffer member 3 and the reinforcing partition 2 are alternately arranged, making the arrangement of the reinforcing partition 2 and the buffer member 3 in the cell row 10 more balanced, so that each pouch cell 1 in the cell row 10 can obtain stable and reliable support, heat-exchange and buffer effects.

[0265] In some embodiments, the buffer member 3 covers more than 80% of the area of the thickness-side surface of the pouch cell 1 (i.e., the surface of the pouch cell 1 facing the buffer member 3). For example, the buffer member 3 can cover 80%, 81%, 82%, 84%, 85%, 90%, 100% or the like of the area of the thickness-side surface of the pouch cell 1.

[0266] In the above technical solution, by setting the buffer member 3 to cover more than 80% of the surface area of the thickness side of the soft-pack battery cell 1, a larger buffer cooperation area can be formed between the soft-pack battery cell 1 and the buffer member 3, so that the buffering effect of the buffer member 3 on the soft-pack battery cell 1 can be improved, enabling the soft-pack battery cell 1 to obtain buffering to a greater extent and enhancing the reliability of the soft-pack battery cell 1.

[0267] In some embodiments, the buffer member 3 is not limited to being located between adjacent soft-pack battery cells 1. For example, buffer members 3 can be provided at both ends of the battery cell row 10 in the first direction F1. In this way, all the soft-pack battery cells 1 in the battery cell row 10 can be clamped between the buffer members 3 at both ends, which is beneficial for reducing space occupation, increasing the energy density of the battery device 100, and achieving a buffering effect.

[0268] Figure 13 Schematic diagram of the connection between the battery cell row 10 and the mounting bracket 8 provided by some embodiments of the present utility model; Figure 14 For Figure 13 Enlarged view of the C part framed in Figure 15 For Figure 4 Enlarged view of the F part framed in Figure 16 Schematic diagram of the battery device 100 provided by some embodiments of the present utility model; Figure 17 For a cross-sectional view along Figure 16 The E-E line shown in Figure 18 For Figure 17 Enlarged view of the D part framed in

[0269] In some embodiments, please refer to Figure 3 , and in combination with Figure 13 - Figure 15 , the battery device 100 includes a box body 20 for loading the battery cell row 10. The edge of the reinforcing partition 2 has a connecting portion 23 protruding from the soft-pack battery cell 1, and the connecting portion 23 is used to form a connection with the box body 20. Specifically, when the reinforcing partition 2 is connected to the box body 20, the soft-pack battery cell 1 itself can be connected to the box body 20, for example, by means of potting, or the soft-pack battery cell 1 can also not be connected to the box body 20.

[0270] In the above technical solution, by setting the reinforcing partition 2 to be connected to the box body 20, a reliable connection between the battery cell row 10 and the box body 20 can be achieved, and the connection reliability between the battery cell row 10 and the box body 20 can be improved.

[0271] In some embodiments, when the area of one side surface of the pouch cell 1 facing the box body 20 (for example, one side surface in the width direction of the pouch cell 1) is small and it is difficult to achieve a reliable connection between the pouch cell 1 and the box body 20, connecting the reinforcing partition 2 to the box body 20 can improve the connection reliability between the battery cell row 10 and the box body 20, enabling the pouch cell 1 to work stably and reliably.

[0272] Of course, the present invention is not limited to this. For example, in other embodiments of the present invention, the large surface of the pouch cell 1 (for example, one side surface in the thickness direction of the pouch cell 1) can also be arranged facing the box body 20.

[0273] In some embodiments, referring to Figure 14 and Figure 18 , the box body 20 includes a box body main body 7 and a mounting bracket 8. The mounting bracket 8 is installed inside the box body main body 7, and the connecting portion 23 is connected to the mounting bracket 8. Among them, the connection method between the box body main body 7 and the mounting bracket 8 is not limited and can be a detachable connection or a non-detachable connection.

[0274] In the above technical solution, by arranging the mounting bracket 8 inside the box body main body 7 and enabling the reinforcing partition 2 to be connected to the box body 20 through the mounting bracket 8, the connection difficulty between the reinforcing partition 2 and the box body 20 can be reduced, and the flexible installation of the reinforcing partition 2 and the box body 20 can be realized. For example, the reinforcing partition 2 can be first installed on the mounting bracket 8, and then the mounting bracket 8 can be installed into the box body main body 7. Or, the mounting bracket 8 can be first installed into the box body main body 7, and then the reinforcing partition 2 can be connected to the mounting bracket 8. In addition, the shape and position of the mounting bracket 8 can be flexibly set to further reduce the connection difficulty with the reinforcing partition 2 and improve the connection reliability with the reinforcing partition 2. Additionally, the material of the mounting bracket 8 can be flexibly selected to improve the reliability and stability of the mounting bracket 8 for fixing the battery cell row 10.

[0275] Among them, the material of the mounting bracket 8 is not limited. For example, it can be a metal material, so as to improve the connection strength. The connection method between the box body main body 7 and the mounting bracket 8 is not limited. For example, it can be screw connection, riveting, welding, etc.

[0276] In some embodiments, as Figure 13 and Figure 14 shown, the pouch cells 1 in the battery cell row 10 are arranged along the thickness direction of the pouch cell 1 (for example, the first direction F1). The pouch cells 1 are arranged vertically, that is, the width direction of the pouch cell 1 (for example, the third direction F3) is the vertical direction, and the length direction of the pouch cell 1 (for example, the second direction F2) is the horizontal direction. The mounting bracket 8 is arranged on one side in the length direction of the pouch cell 1 (for example, the second direction F2).

[0277] It can be understood that, with the above arrangement, the thickness direction of the soft-pack battery cell 1 is the horizontal direction, multiple soft-pack battery cells 1 in the battery cell row 10 are arranged along the horizontal direction, and the mounting bracket 8 and the soft-pack battery cell 1 are also arranged along the horizontal direction.

[0278] Thus, both the battery cell row 10 and the mounting bracket 8 can reduce the occupation of the vertical space, which is beneficial to improving the structural compactness of the battery device 100 in the vertical direction, reducing the vertical dimension of the battery device 100, and facilitating the arrangement of the battery device 100 in a position with limited vertical space (such as under the vehicle floor, etc.). Moreover, there is no stacking relationship in the vertical direction between the soft-pack battery cells 1 in the battery cell row 10, which improves the consistency of the soft-pack battery cells 1 in the battery cell row 10. And the setting position of the mounting bracket 8 is beneficial to connecting with each reinforcing partition 2 in the battery cell row 10, thereby improving the reliability and stability of the fixation of the mounting bracket 8 to the battery cell row 10.

[0279] Exemplarily, in combination with Figure 13 , when the battery device 100 includes multiple such battery cell rows 10, the multiple battery cell rows 10 can be arranged along the thickness direction and / or the length direction of the soft-pack battery cell 1, so as to further reduce the occupation of the vertical space.

[0280] In some embodiments, as Figure 14 shown, the upper end of the mounting bracket 8 is lower than the upper end of the soft-pack battery cell 1, so as to form an upper clearance space S1 above the mounting bracket 8, and the connecting portion 23 is connected to the mounting bracket 8 at a position lower than the upper clearance space S1.

[0281] In the above technical solution, by reserving the upper clearance space S1 above the mounting bracket 8, other components of the battery device 100 can be arranged in the upper clearance space S1, for example, it can be used to arrange circuits, etc., so as to make full use of the space above the mounting bracket 8, reduce the occupation of space in other positions, and thus be beneficial to improving the compactness and energy density of the battery device 100.

[0282] In some embodiments, as Figure 14 - Figure 18 shown, the connecting portion 23 is connected to the upper part of the mounting bracket 8, and the lower end of the connecting portion 23 is higher than the lower end of the mounting bracket 8, so as to form a lower clearance space S2 below the connecting portion 23. The soft-pack battery cell 1 has a conductive member 12 electrically connected to the electrode assembly, and at least part of the conductive member 12 is exposed outside the soft-pack housing 11 and is located in the lower clearance space S2.

[0283] In the above technical solution, by setting the size of the connecting portion 23 in the up-down direction to be relatively small and arranging it relatively above the mounting bracket 8, a lower clearance space S2 can be formed below the connecting portion 23, so that the conductive member 12 of the soft-pack battery cell 1 can be accommodated in the lower clearance space S2, thereby making full use of the space below the connecting portion 23, reducing the space occupation of other positions, and thus being beneficial to improving the compactness and energy density of the battery device 100.

[0284] In some embodiments, referring to Figure 14 - Figure 18 , the upper end of the mounting bracket 8 is lower than the upper end of the soft-pack battery cell 1 to form an upper clearance space S1 above the mounting bracket 8. The connecting portion 23 is connected to the mounting bracket 8 at a position lower than the upper clearance space S1. At the same time, the connecting portion 23 is connected to the upper part of the mounting bracket 8, and the lower end of the connecting portion 23 is higher than the lower end of the mounting bracket 8 to form a lower clearance space S2 below the connecting portion 23. The soft-pack battery cell 1 has a conductive member 12 electrically connected to the electrode assembly, and at least a part of the conductive member 12 is exposed outside the soft-pack housing 11 and is located in the lower clearance space S2.

[0285] In this way, by arranging the soft-pack battery cell 1 vertically and setting the size of the connecting portion 23 in the up-down direction to be relatively small and arranging it relatively above the mounting bracket 8, clearance spaces are respectively formed above and below the connecting portion 23, so that the space inside the battery device 100 can be fully utilized, the space occupation of other positions is reduced, and it is beneficial to improving the energy density of the battery device 100.

[0286] In some embodiments, referring to Figure 14 , one mounting bracket 8 is connected to at least two connecting portions 23.

[0287] Thus, by setting one mounting bracket 8 to be connected to at least two connecting portions 23, the number of mounting brackets 8 used can be reduced to a certain extent, the number of components is reduced, and the assembly efficiency is improved.

[0288] In some embodiments, referring to Figure 14 , the mounting bracket 8 includes a plurality of side walls 81 arranged at intervals along the arrangement direction of the soft-pack battery cells 1 in the battery cell row 10 (such as the first direction F1 shown in the figure). Each side wall 81 corresponds to one connecting portion 23, and the connecting portion 23 is connected to the side wall 81. Thus, while the mounting bracket 8 satisfies the connection with the connecting portion 23, it can reduce the space occupation and can minimize the material cost of the mounting bracket 8 to achieve light weight.

[0289] In some embodiments, referring to Figure 14, there are multiple mounting brackets 8 arranged along the arrangement direction of the pouch cells 1 in the cell row 10 (for example, the first direction F1 shown in the figure). Each mounting bracket 8 includes two side walls 81 and a connecting wall 82 connecting the two side walls 81. The adjacent side walls 81 of two adjacent mounting brackets 8 clamp the same connecting portion 23. It should be noted that the connecting portion 23 clamped by the two adjacent side walls 81 can be connected to the two side walls 81 respectively, or only connected to one of the side walls 81.

[0290] Thus, the processing difficulty of a single mounting bracket 8 can be reduced, facilitating the flexible connection between the pouch cell 1 and the mounting bracket 8. Among them, the multiple mounting brackets 8 can be independently formed respectively. Two adjacent mounting brackets 8 can be unconnected or connected. For example, two adjacent mounting brackets 8 can be connected by welding, or connected by structural adhesive, or connected by fasteners, etc.

[0291] In some embodiments, in combination with Figure 3 and Figure 13 , one of the length direction and the width direction of the box body 20 is the first direction F1, and the other is the second direction F2. The height direction of the box body 20 is the third direction F3. The pouch cells 1 in the cell row 10 are arranged along the first direction F1. The first direction F1 is the thickness direction of the pouch cell 1, the second direction F2 is the length direction of the pouch cell 1, and the third direction F3 is the width direction of the pouch cell 1. Mounting brackets 8 are respectively provided at both ends of the box body 20 in the second direction F2.

[0292] Thus, the arrangement position of the mounting bracket 8 is beneficial to connecting with each reinforcing partition 2 and is not likely to cause an increase in the size of the box body 20 in the height direction, which is beneficial to ensuring that the height dimension of the box body 20 is small.

[0293] In some embodiments, in combination with Figure 3 , Figure 13 and Figure 14 , multiple mounting brackets 8 arranged along the first direction F1 are respectively provided at each end of the box body 20 in the second direction F2.

[0294] Thus, by providing multiple mounting brackets 8, it is beneficial to flexibly connect with multiple reinforcing partitions 2 and reduce the connection difficulty between the reinforcing partition 2 and the mounting bracket 8. Among them, the form of the mounting bracket 8 is not limited. For example, it can refer to the above embodiments, but is not limited to the above embodiments.

[0295] In some embodiments, in combination with Figure 3 and Figure 13, a battery module 101 is provided inside the box body 20. The battery module 101 includes two battery cell rows 10 arranged along the second direction F2, and all the pouch cells 1 in each battery cell row 10 are stacked in sequence along the thickness direction of the pouch cell 1. The two battery cell rows 10 in the same battery module 101 are respectively connected to the mounting brackets 8 on the corresponding sides at the ends away from each other in the second direction F2. Thus, the length of a single pouch cell 1 can be reduced, and the processing difficulty of a single pouch cell 1 can be lowered.

[0296] In some embodiments, in combination with Figure 3 and Figure 13 , the length direction of the reinforcing partition 2 extends along the second direction F2. The two ends of the length of the reinforcing partition 2 respectively extend to the two ends of the battery module 101 in the second direction F2, so that the two battery cell rows 10 in the battery module 101 share the reinforcing partition 2. The two ends of the length of the reinforcing partition 2 are respectively and correspondingly connected to the mounting brackets 8 at the two ends of the box body 20 in the second direction F2. For example, during production, the two battery cell rows 10 can be first connected into a whole, and then the two ends of the length of each reinforcing partition 2 are respectively connected to the mounting brackets 8.

[0297] For example, the second direction F2 is the left - right direction. A mounting bracket 8 is provided at the left end of the box body 20, and a mounting bracket 8 is also provided at the right end of the box body 20. The two battery cell rows 10 in the battery module 101 are arranged along the left - right direction. The left end of the reinforcing partition 2 extends to the left end of the left - hand battery cell row 10, and the right end of the reinforcing partition 2 extends to the right end of the right - hand battery cell row 10. The left end of the reinforcing partition 2 is connected to the mounting bracket 8 at the left end of the box body 20, and the right end of the reinforcing partition 2 is connected to the mounting bracket 8 at the right end of the box body 20.

[0298] Thus, the length of the reinforcing partition 2 is relatively long, the number of reinforcing partitions 2 can be reduced, and the overall stability of the battery module 101 is better. Moreover, there is no need to provide a mounting bracket 8 between the two battery cell rows 10 in the battery module 101, so the number of mounting brackets 8 used can be reduced, the assembly efficiency can be improved, and the production cost can be lowered.

[0299] It should be noted that the battery module 101 can be one, or it can also be multiple arranged along the first direction F1. In this way, box body 20 beams etc. can also be arranged at the interval positions of the multiple battery modules 101 along the first direction F1.

[0300] In some embodiments, in combination with Figure 5 and Figure 6 , the pouch cell 1 includes a conductive member 12. The conductive member 12 is electrically connected to the electrode assembly and at least partially exposed outside the pouch outer shell 11. Two adjacent pouch cells 1 in the battery cell row 10 are connected through the conductive member 12.

[0301] Thus, by arranging two adjacent pouch cells 1 to be connected by a conductive member 12, the connection of multiple pouch cells 1 in the cell row 10 can be simplified, facilitating the electrical connection of the pouch cells 1 in the battery device 100.

[0302] In some embodiments, in combination with Figure 5 and Figure 6 , the two conductive members 12 forming the connection are lap-connected, and at least one conductive member 12 is in a bent shape.

[0303] Thus, by arranging the two conductive members 12 forming the connection to be lap-connected, a relatively large connection area can be provided between the two conductive members 12, making the connection and fixation of the two conductive members 12 relatively stable and reliable. Moreover, by arranging at least one conductive member 12 in a bent shape, the two pouch cells 1 connected by the conductive member 12 can be stacked in the thickness direction. And this connection method can simplify the structure, reduce parts, and improve the assembly efficiency.

[0304] Exemplarily, the two conductive members 12 forming the connection can be lap-connected and directly connected by means such as welding or bonding. Herein, the lap connection of the two conductive members 12 means that the two conductive members 12 have a certain lap mating area. For example, one conductive member 12 can extend linearly, and the other conductive member 12 can be bent towards this conductive member 12 to achieve lap connection with it, or both conductive members 12 are in a bent shape, that is, the two conductive members 12 can be bent towards each other and achieve lap connection.

[0305] Or in some other embodiments, in combination with Figure 11 , the two conductive members 12 forming the connection are connected by an adapter piece 13, and the adapter piece 13 is in a bent shape.

[0306] Thus, by arranging adjacent pouch cells 1 in the cell row 10 to be connected by the adapter piece 13 and arranging the adapter piece 13 in a bent shape, the design of the conductive member 12 can be simplified, the length of the conductive member 12 can be shortened, the processing steps and procedures of the conductive member 12 during the connection of the pouch cells 1 can be reduced, the production efficiency can be improved, and the two pouch cells 1 connected by the conductive member 12 can be stacked in the thickness direction. In addition, a standardized-produced adapter piece 13 can be used for rapid and efficient connection processing, making the connection of multiple pouch cells 1 more convenient and efficient, and making the production efficiency of the cell row 10 higher.

[0307] Exemplarily, both conductive members 12 forming the connection extend linearly, and the adapter piece 13 extends towards the two conductive members 12 respectively through its bent shape and is lap-connected to the two conductive members 12 respectively. Or at least one conductive member 12 can also be arranged in a bent shape that is shape-matched with the adapter piece 13 to increase the lap connection area between the two.

[0308] In some embodiments, the bending form is U-shaped or C-shaped. Thus, the structure is simple, facilitating processing and forming, not prone to stress concentration problems, improving the structural quality, not prone to risks such as fracture, making the connection of the two soft-pack battery cells 1 more stable and reliable, and the conductivity more stable. Moreover, the U-shape can reduce the space occupation compared to the C-shape.

[0309] Figure 19 Schematic diagram of the battery cell row 10 provided by some embodiments of the present utility model; Figure 20 is Figure 19 the state diagram of the two soft-pack battery cells 1 in the battery cell row 10 before being folded in half in

[0310] In some embodiments, referring to Figure 19 , conductive members 12 are respectively provided at both ends of the soft-pack battery cell 1 in the length direction, and the conductive members 12 at the adjacent ends of the adjacent two soft-pack battery cells 1 in the length direction are connected.

[0311] It can be understood that the length direction, width direction, and thickness direction of each soft-pack battery cell 1 in the battery cell row 10 correspond to each other, and the soft-pack battery cells 1 in the battery cell row 10 are arranged along the thickness direction of the soft-pack battery cell 1. The adjacent ends of the adjacent two soft-pack battery cells 1 in the battery cell row 10 refer to the ends close to each other in the length direction. For example, the length direction of each soft-pack battery cell 1 in the battery cell row 10 is the left-right direction, the left end of a soft-pack battery cell 1 and the left end of the adjacent soft-pack battery cell 1 are adjacent ends, and similarly, the right end of a soft-pack battery cell 1 and the right end of the adjacent soft-pack battery cell 1 are adjacent ends.

[0312] Thus, by providing conductive members 12 at both ends of the soft-pack battery cell 1 in the length direction and connecting the conductive members 12 at the adjacent ends of the adjacent two soft-pack battery cells 1 in the length direction, the occupation of the width direction of the soft-pack battery cell 1 can be reduced. When the width direction is vertical, it is beneficial to reduce the occupation of the vertical space, reduce the size of the battery device 100 along the vertical direction, and improve the energy density of the battery device 100 along the vertical direction.

[0313] In some embodiments, when conductive members 12 are respectively provided at both ends of the soft-pack battery cell 1 in the length direction and the conductive members 12 at the adjacent ends of the adjacent two soft-pack battery cells 1 in the length direction are connected, the polarities of the two conductive members 12 at both ends of the soft-pack battery cell 1 in the length direction can be set to be opposite, and the polarities of the two conductive members 12 forming the connection can be the same or opposite.

[0314] Thus, series connection and / or parallel connection can be achieved as needed, enabling the battery device 100 to be flexibly set.

[0315] For example, the two conductive members 12 forming the connection can both be positive electrodes. Thus, by connecting the conductive members 12 with the same polarity, parallel connection between the soft-pack battery cells 1 can be achieved. Or, for another example, one of the two conductive members 12 forming the connection is a positive electrode and the other is a negative electrode. Thus, by connecting the conductive members 12 with opposite polarities, series connection between the soft-pack battery cells 1 can be achieved.

[0316] Exemplarily, the positive electrodes of the multiple soft-pack battery cells 1 in the battery cell row 10 are arranged on the same side in the length direction, and the negative electrodes are arranged on the other side in the length direction of the soft-pack battery cells 1. In this way, adjacent two soft-pack battery cells 1 can form a parallel connection by connecting the conductive members 12 with the same polarity on the same side.

[0317] Or exemplarily, when the conductive members 12 arranged on the same side in the length direction of the multiple soft-pack battery cells 1 in the battery cell row 10 are positive and negative electrodes alternating, adjacent two soft-pack battery cells 1 can form a series connection by connecting the conductive members 12 with opposite polarities on the same side.

[0318] Or further exemplarily, the arrangement forms of the positive and negative electrodes in the multiple soft-pack batteries in the battery cell row 10 can be arranged more flexibly and complexly as needed. For example, at least two adjacent conductive members 12 located on the same side have the same polarity, and at the same time at least two adjacent conductive members 12 located on the same side have opposite polarities. In this way, multiple soft-pack battery cells 1 can form a series-parallel connection through the conductive members 12 on the same side.

[0319] In some embodiments, referring to Figure 19 and Figure 20 , the battery cell row 10 includes at least three soft-pack battery cells 1. Among the two conductive members 12 of the soft-pack battery cell 1 located between two adjacent soft-pack battery cells 1 in the battery cell row 10, one conductive member 12 is connected to the conductive member 12 on the same side of an adjacent soft-pack battery cell 1, and the other conductive member 12 is connected to the conductive member 12 on the same side of another adjacent soft-pack battery cell 1.

[0320] Thus, multiple soft-pack battery cells 1 can be arranged in a row along the length direction of the soft-pack battery cells 1 first, each adjacent two conductive members 12 are connected, and then the connection points of the conductive members 12 are bent so that multiple soft-pack battery cells 1 can be arranged in a column along the thickness direction, thereby simplifying the processing and improving the production efficiency.

[0321] For example, in the battery cell row 10, three pouch cells 1 are provided. In the thickness direction of the pouch cell 1, the pouch cell 1 located in the middle is denoted as the middle cell, and the other two pouch cells 1 can be denoted as adjacent cells. When four pouch cells 1 are provided in the battery cell row 10, among the three adjacent pouch cells 1, the pouch cell 1 located in the middle is denoted as the middle cell, and the two pouch cells 1 adjacent to it can be denoted as adjacent cells. The conductive member 12 at one end in the length direction of the middle cell is connected to the conductive member 12 on the same side in one adjacent cell, and the conductive member 12 at the other end in the length direction of the middle cell is connected to the conductive member 12 on the same side in the other adjacent cell. Thus, the multiple pouch cells 1 in the battery cell row 10 can be formed into a form of connecting end to end in sequence, so that the multiple pouch cells 1 can be connected conveniently and easily, and the assembly of the battery cell row 10 is more efficient and convenient.

[0322] In some embodiments, referring to Figure 3 and Figure 4 , the battery device 100 includes a box body 20 for loading the battery cell row 10. A battery module 101 is provided in the box body 20. The battery module 101 includes two battery cell rows 10 arranged along the length direction of the pouch cell 1. All the pouch cells 1 in each battery cell row 10 are stacked in sequence along the thickness direction of the pouch cell 1; the conductive members 12 on the side close to each other in the length direction of the pouch cell 1 of the two battery cell rows 10 in the same battery module 101 are connected.

[0323] Thus, series connection and / or parallel connection of multiple battery cell rows 10 can be achieved, which is beneficial to simplifying the electrical connection in the entire battery device 100.

[0324] For example, if the two battery cell rows 10 are arranged in the left - right direction, the pouch cells 1 in the two battery cell rows 10 are arranged adjacent to each other in the left - right direction. Taking two adjacent pouch cells 1 in the two battery cell rows 10 as an example, the conductive member 12 at the right end of a pouch cell 1 in the left - hand battery cell row 10 is connected to the conductive member 12 at the left end of the pouch cell 1 on the right, for example, by lap connection, and these two conductive members 12 can be set to have the same or opposite polarities according to the series - parallel connection requirements. Thus, the structure is simple, the connection is convenient and easy, and the steps and processes of bending the conductive members 12 of two adjacent pouch cells 1 during production for connection can be reduced, making the production efficiency of the battery cell row 10 higher during production and processing.

[0325] In some embodiments, referring to Figure 3 and Figure 14 , the battery device 100 includes a box body 20 for loading the battery cell row 10. The edge of the reinforcing partition 2 has a connecting portion 23 protruding from the pouch cell 1 along the length direction of the pouch cell 1. The connecting portion 23 is used to form a connection with the box body 20 and is spaced from the conductive member 12 along the width direction of the pouch cell 1.

[0326] Therefore, the space can be fully utilized, the space compactness can be improved, the space occupied by the soft-pack battery cell 1 in the width direction can be reduced. When the width direction is vertical, it is beneficial to reduce the occupation of the vertical space, reduce the size of the battery device 100 in the vertical direction, and increase the energy density of the battery device 100 in the vertical direction.

[0327] In some embodiments, referring to Figure 21 and Figure 22 , the soft-pack outer shell 11 includes two film parts 111 arranged and connected along the thickness direction of the soft-pack battery cell 1. Both of the two film parts 111 define accommodation grooves. The accommodation grooves of the two film parts 111 open towards each other along the thickness direction of the soft-pack battery cell 1, and jointly form the accommodation cavity of the soft-pack outer shell 11. The electrode assembly is arranged in the accommodation cavity, and the wall thickness of the film part 111 is less than or equal to 0.2 mm.

[0328] In this embodiment, the wall thickness of the film part 111 is less than or equal to 0.2 mm. For example, the wall thickness of the film part 111 can be 0.2 mm, 0.19 mm, 0.17 mm, 0.15 mm, 0.1 mm, etc. In this embodiment, by setting the wall thickness of the film part 111 to be less than or equal to 0.2 mm, the volume proportion of the soft-pack outer shell 11 in the soft-pack battery cell 1 is relatively small and the mass is lighter, and the volume and mass proportions of the electrode assembly in the soft-pack battery cell 1 are larger, so that the energy density of the soft-pack battery cell 1 can be well improved.

[0329] Exemplarily, the electrode assembly is composed of a positive electrode tab, a negative electrode tab and a separator. The soft-pack battery cell 1 mainly works by the movement of metal ions between the positive electrode tab and the negative electrode tab. The positive electrode tab includes a positive current collector and a positive active material layer, and the positive active material layer is coated on the surface of the positive current collector.

[0330] Exemplarily, the soft-pack outer shell 11 can be an aluminum-plastic film. The two film parts 111 connected in the thickness direction of the soft-pack battery cell 1 can be processed and formed by punching the aluminum-plastic film substrate. Both of the two film parts 111 define accommodation grooves, so the soft-pack outer shell 11 can be processed and formed by double punching. Exemplarily, during the production and processing of the soft-pack battery cell 1, the soft-pack outer shell 11 can form two film parts 111 with accommodation grooves by double punching. The electrode assembly is arranged in the accommodation groove of one of the film parts 111, and the other film part 111 is folded towards the film part 111 accommodating the electrode assembly, so that the two accommodation grooves cooperate to form an accommodation cavity. Then, the soft-pack battery cell 1 undergoes subsequent production processes such as edge sealing and liquid injection. The two film parts 111 form a sealed accommodation cavity through edge sealing, thereby forming a complete soft-pack outer shell 11.

[0331] In some embodiments, the dimension of the pouch cell 1 in the thickness direction of the pouch cell 1 is the first dimension H1, and the dimension of any one film portion 111 in the thickness direction of the pouch cell 1 is the second dimension H2. Herein, since the pouch cell 1 is composed of two film portions 111 to form the pouch casing 11, and the overall dimension of the two film portions 111 in the thickness direction of the pouch cell 1 is the first dimension H1, the sum of the second dimensions H2 of the two film portions 111 is equal to the first dimension H1, and the second dimensions H2 of the two film portions 111 can be set to be the same or different as required.

[0332] In some embodiments, the first dimension H1 is greater than or equal to 5 mm and less than or equal to 70 mm, such as 5 mm, 6 mm, 10 mm, 12 mm, 17 mm, 25 mm, 30 mm, 40 mm, 47 mm, 53 mm, 60 mm, 65 mm, 70 mm, and so on. The ratio of the second dimension H2 to the first dimension H1 is greater than or equal to 0.4 and less than or equal to 0.6, such as 0.6, 0.55, 0.5, 0.48, 0.46, 0.45, 0.4, and so on.

[0333] Herein, the first dimension H1 is set to be greater than or equal to 5 mm and less than or equal to 70 mm, so that the thickness of the pouch cell 1 is relatively thick, thereby cooperating with the relatively thin pouch casing 11, enabling the pouch cell 1 to have a greater energy density, and enabling the thickness of the pouch cell 1 to be flexibly set within a relatively large range as required, so that the pouch cell 1 can better meet the usage requirements of battery devices 100 of different size specifications.

[0334] Herein, the ratio of the second dimension H2 to the first dimension H1 is set to be greater than or equal to 0.4 and less than or equal to 0.6, so that the dimensions of the two film portions 111 in the first direction F1 can be relatively consistent, enabling both of the two film portions 111 to maintain sufficient mechanical strength to meet the forming requirements of the pouch casing 11, thereby forming a stable and reliable pouch casing 11 when the first dimension H1 of the pouch cell 1 in this embodiment is set to be greater than or equal to 5 mm and less than or equal to 70 mm.

[0335] In this embodiment, by setting the thickness of the soft-pack housing 11 to be less than 0.2 mm, the ratio of the second dimension H2 to the first dimension H1 of any one film portion 111 is greater than or equal to 0.4 and less than or equal to 0.6, and the first dimension H1 is greater than or equal to 5 mm and less than or equal to 70 mm, the soft-pack battery cell 1 can have a larger thickness and a higher energy density. Under the same volume, compared with multiple soft-pack battery cells 1 with a thinner thickness, the number of soft-pack battery cells 1 arranged in this embodiment is smaller, so that the proportion of the soft-pack housing 11 can be reduced. Furthermore, multiple soft-pack battery cells 1 within the same volume can have a greater energy density. Moreover, the arrangement quantity of structural components such as the reinforcing partition 2 and the buffer member 3 in the battery device 100 can be reduced, and the arrangement space of the soft-pack battery cells 1 in the battery device 100 can be increased, thereby enabling the overall energy density of the battery device 100 to be well improved.

[0336] When the soft-pack battery cell 1 in this embodiment is assembled and arranged in the battery device 100, within the same arrangement space, the battery device 100 can obtain a greater energy density by arranging fewer soft-pack battery cells 1. Moreover, due to the reduction in the number of soft-pack battery monomers, the quantity of the support structure for supporting the soft-pack battery cell 1 and structural components such as heat conduction and adhesive fixing is also well reduced, so that there can be a larger space in the battery device 100 for arranging the soft-pack battery cells 1. Thus, the overall energy density of the battery device 100 is well improved.

[0337] Exemplarily, the ratio of the second dimension H2 to the first dimension H1 can be greater than or equal to 0.45 and less than or equal to 0.55. For example, the ratio of the second dimension H2 to the first dimension H1 is 0.45, 0.46, 0.48, 0.49, 0.5, 0.51, 0.53, 0.55, etc. This makes the dimensions of the two film portions 111 in the first direction F1 more consistent, facilitating processing and production, and enables the receiving grooves of the two film portions 111 to have sufficient depth for arranging the electrode assembly, and enables the two film portions 111 to maintain relatively consistent mechanical strength, making the overall structure of the soft-pack housing 11 more stable and reliable, so that the soft-pack battery cell 1 can work and be used stably and reliably.

[0338] Exemplarily, the ratio of the second dimension H2 to the first dimension H1 can be 0.5. That is to say, the dimensions of the two film portions 111 in the first direction F1 are the same, the two film portions 111 can form a symmetric structure, and the dimensions of the receiving grooves of the two film portions 111 are also the same. That is, by setting the ratio of the second dimension H2 to the first dimension H1 to 0.5, the two film portions 111 can have the same structural configuration, so that the processing and forming of the soft-pack housing 11 are more convenient, and the two film portions 111 can have consistent mechanical strength and structural performance, thereby making the overall structural stability and reliability of the soft-pack housing 11 better and the soft-pack battery cell 1 more stable.

[0339] Exemplarily, the first dimension H1 is greater than or equal to 15 mm and less than or equal to 45 mm, for example, 15 mm, 16 mm, 20 mm, 25 mm, 35 mm, 40 mm, 42 mm, 45 mm, etc. The soft-pack battery cell 1 has a larger thickness, so that the energy density of the battery device 100 can be greatly improved, and the probability of the structural stability of the soft-pack battery cell 1 decreasing due to the excessive thickness of the soft-pack battery cell 1 is reduced, so that the soft-pack battery cell 1 has an appropriate thickness to work stably and reliably.

[0340] Exemplarily, the second dimension H2 is greater than or equal to 3 mm and less than or equal to 35 mm. For example, 3 mm, 5 mm, 6 mm, 8 mm, 15 mm, 30 mm, 35 mm, etc. In this embodiment, the second dimension H2 is set to be greater than or equal to 3 mm and less than or equal to 35 mm, so that the two membrane portions 111 can cooperate to form a soft-pack shell 11 of the required thickness of the soft-pack battery, meeting the setting requirements of the soft-pack battery cell 1.

[0341] Exemplarily, the second dimension H2 is greater than or equal to 7 mm and less than or equal to 22 mm. For example, 7 mm, 8 mm, 10 mm, 12 mm, 15 mm, 20 mm, 22 mm, etc. In this embodiment, the second dimension H2 is set to be greater than or equal to 7 mm and less than or equal to 22 mm, so that the membrane portion 111 has a more suitable size in the first direction F1, so that the membrane portion 111 can have good mechanical strength and structural stability, so that the overall structure of the soft-pack shell 11 is more stable and reliable, so that the electrode assembly can be stably and reliably arranged in the accommodating cavity, so that the soft-pack battery cell 1 works more stably.

[0342] When the soft-pack battery cell 1 is processed, the two membrane parts 111 can be used to seal the accommodating cavity through an edge sealing process. For example, the edges of the two membrane parts 111 can be connected by hot pressing, cold pressing, welding, etc., so that the circumference of the accommodating cavity is sealed.

[0343] In some embodiments, the two membrane parts 111 are separate parts and have four edges sealed, and the two membrane parts 111 are separate parts and have edge sealing structures 112 around the four sides of the soft-pack battery cell 1. Therefore, the single membrane part 111 is easy to process and the processing difficulty can be reduced.

[0344] In some embodiments, the two membrane parts 111 are an integral part and three sides are sealed. The two membrane parts 111 are an integral part and one long side and two wide sides around the soft-pack battery cell 1 have edge sealing structures 112. In this way, the number of edge sealing times can be reduced, and the size of the entire soft-pack battery cell 1 in the width direction can be reduced, thereby improving the energy density. In addition, compared with the edge sealing around the edges, the leakage problem caused by lax edge sealing can be avoided by omitting one side of the edge sealing, thereby improving the reliability of the soft-pack battery cell 1.

[0345] In some embodiments, in combination with Figure 2 , Figure 3 , Figure 16 - Figure 18 , the battery device 100 includes a box body 20 for loading the battery cell row 10. The box body 20 includes cover plates 71 arranged on both sides of the battery cell row 10 along the height direction of the box body 20. The cover plates 71 on both sides are respectively a top plate 712 and a bottom plate 711. The box body 20 further includes: a heat exchange plate 9, which is arranged between the battery cell row 10 and the cover plate 71 and is used for heat exchange with the battery cell row 10. Thus, the heat exchange plate 9 can conveniently perform heat exchange with a plurality of soft-pack battery cells 1, so that the battery cell row 10 can obtain a good heat exchange effect, enabling the battery cell row 10 to work stably and reliably, and further making the battery device 100 work more stably.

[0346] For example, the width direction of the soft-pack battery cell 1 is the same as the height direction of the box body 20, both being the up-down direction. The heat exchange plate 9 can be a liquid-cooling plate. The heat exchange plate 9 is arranged on at least one side of the plurality of soft-pack battery cells 1 in the width direction of the soft-pack battery cell 1. For example, the heat exchange plate 9 can be arranged on one side of the plurality of soft-pack battery cells 1 in the width direction of the soft-pack battery cell 1. The heat exchange plate 9 can also be respectively arranged on both sides of the plurality of soft-pack battery cells 1 in the width direction of the soft-pack battery cell 1. When the battery device 100 is working, the heat generated by the plurality of soft-pack battery cells 1 in the battery cell row 10 during operation is dissipated through the heat exchange plate 9. When the battery cell row 10 needs to be heated, the heat exchange plate 9 can transfer heat to the soft-pack battery cells 1 in the battery cell row 10.

[0347] In some embodiments, in combination with Figure 18 , the width direction of the soft-pack battery cell 1 is the same as the height direction of the box body 20. The surface of the soft-pack outer shell 11 facing the heat exchange plate 9 in the width direction of the soft-pack battery cell 1 is a plane and is connected to the heat exchange plate 9 through a heat-conducting medium.

[0348] For example, when the two film parts 111 are an integral part and have edge-sealing structures 112 on one long side and two wide sides of the periphery of the soft-pack battery cell 1 respectively, the edge-sealing structure 112 may not be formed on the surface of the soft-pack outer shell 11 facing the heat exchange plate 9. After the soft-pack outer shell 11 is folded into shape, the folding line of the two film parts 111 faces the heat exchange plate 9.

[0349] For example, the heat-conducting medium can be a heat-conducting adhesive, such as a heat-conducting structural adhesive. For example, the heat-conducting medium can be a heat-conducting pad. For example, the heat-conducting pad can be a rubber pad, etc. When the battery cell row 10 and the heat exchange plate 9 are assembled, the heat-conducting adhesive or the heat-conducting pad can be pre-laid on the surface of the heat exchange plate 9 that cooperates with the soft-pack outer shell 11. The battery cell row 10 can be integrally arranged on the heat exchange plate 9 and fixedly connected to the heat exchange plate 9 through the heat-conducting adhesive or the heat-conducting pad.

[0350] In this embodiment, one side surface of the soft package housing 11 facing the heat exchange plate 9 is set as a flat surface, which can enable the soft package housing 11 to have a stable mating contact surface with the heat exchange plate 9, so that the soft package housing 11 can be stably and reliably fixed to the heat exchange plate 9 through heat-conducting glue or a heat-conducting pad. Thus, the assembly and fixation of the soft package battery cell 1 on the heat exchange plate 9 are more convenient and stable, and the assembly and fixation of the battery cell row 10 and the heat exchange plate 9 are more reliable, thereby improving the heat exchange reliability.

[0351] In some embodiments, in combination with Figure 2 、 Figure 3 、 Figure 16 - Figure 18 ,the battery device 100 includes a box body 20 for loading the battery cell row 10. The box body 20 includes top plates 712 and bottom plates 711 arranged on both sides of the battery cell row 10 along the height direction of the box body 20. The box body 20 further includes: a heat exchange plate 9, which is arranged between the battery cell row 10 and the bottom plate 711 and is used for heat exchange with the battery cell row 10, and a mounting bracket 8 is arranged on the top of the heat exchange plate 9.

[0352] Thus, by arranging the mounting bracket 8 on the top of the heat exchange plate 9, the mounting bracket 8 can exchange heat with the heat exchange plate 9, avoiding heat concentration on the mounting bracket 8, which is beneficial to improving the overall heat dissipation effect of the battery device 100.

[0353] Among them, the mounting bracket 8 and the heat exchange plate 9 can be fixedly connected, for example, fixed by fasteners or bonded and fixed by structural glue, etc. Another example is that the mounting bracket 8 can just be placed on the heat exchange plate 9 without fixation between them.

[0354] In some embodiments, the battery device 100 includes a box body 20 for loading the battery cell row 10. The box body 20 includes a top plate 712 and a bottom plate 711 arranged on both sides of the battery cell row 10 along the height direction of the box body 20. The width direction of the soft package battery cell 1 is consistent with the height direction of the box body 20, and a structural glue is filled between the battery cell row 10 and the bottom plate 711. Thus, the stiffness of the soft package battery cell 1 along the height direction of the box body 20 can be improved.

[0355] Exemplarily, the structural glue is heat-conducting glue, which is beneficial to the heat dissipation of the soft package battery cell 1. In this embodiment, a heat exchange plate 9 can be arranged between the bottom plate 711 and the battery cell row 10, or can be not arranged. When the heat exchange plate 9 is arranged, the structural glue can be filled between the bottom plate 711 and the heat exchange plate 9, and between the heat exchange plate 9 and the battery cell row 10.

[0356] In some embodiments, referring to Figure 25, a rubber blocking strip 5 is arranged inside the box body 20. The cover plate 71 includes a bottom plate 711 located below the battery cell row 10. A fitting gap is formed between the bottoms of two adjacent pouch cells 1 arranged along the first direction F1. The rubber blocking strip 5 is located between the fitting gap and the bottom plate 711. In this embodiment, a heat exchange plate 9 may or may not be arranged between the bottom plate 711 and the battery cell row 10. When the heat exchange plate 9 is arranged, the rubber blocking strip 5 may be arranged between the heat exchange plate 9 and the pouch cell 1. When the heat exchange plate 9 is not arranged, the rubber blocking strip 5 may be arranged between the bottom plate 711 and the pouch cell 1.

[0357] In the above technical solution, by arranging the rubber blocking strip 5, the overflow of the structural adhesive can be blocked from forming between adjacent pouch cells 1, reducing the probability that adjacent pouch cells 1 form a local hard structure due to the overflow of the adhesive, thereby improving the problem of local stress concentration between adjacent pouch cells 1 and reducing the risk of damage to the pouch cells 1.

[0358] Exemplarily, the rubber blocking strip 5 can avoid the position directly below the bottom of the pouch cell 1, so that a heat conduction area can be formed between the position directly below the pouch cell 1 and the bottom plate 711.

[0359] In some embodiments, two adjacent pouch cells 1 share one rubber blocking strip 5.

[0360] In the above technical solution, by making two adjacent pouch cells 1 share one rubber blocking strip 5, the number of rubber blocking strips 5 arranged can be reduced, which is beneficial to improving the assembly efficiency.

[0361] In some embodiments, the rubber blocking strip 5 is a rubber blocking foam, and the rubber blocking strip 5 is bonded to the bottom plate 711; or, the rubber blocking strip 5 is a strip with adhesive on one side, and the rubber blocking strip 5 is bonded to the bottom of the pouch cell 1.

[0362] In the above technical solution, the rubber blocking foam has good compressibility. By the pouch cell 1 extruding the rubber blocking strip 5, the overflow of the structural adhesive to adjacent pouch cells can be better prevented, and the rubber blocking strip 5 is bonded to the bottom plate 711, which is convenient for the installation and fixation of the rubber blocking strip 5; or, by setting the rubber blocking strip 5 as a strip with adhesive on one side, it is convenient to bond the rubber blocking strip 5 to the bottom of the pouch cell 1, making the rubber blocking strip 5 and the pouch cell 1 fixed as a whole, thereby conveniently improving the overall assembly efficiency of the battery device 100.

[0363] In some embodiments, refer to Figure 26, the reinforcing partition 2 is an inverted T-shaped or L-shaped structure, and includes a first portion 24 located between adjacent soft-pack battery cells 1 and a second portion 25 located below the soft-pack battery cell 1, and the second portion 25 is located between the bottom of the soft-pack battery cell 1 and the bottom plate 711. For example, the second portion 25 may extend from the lower end of the first portion 24 toward one side in the thickness direction of the soft-pack battery cell 1, so that the reinforcing partition 2 is formed into an L-shaped structure (for example, the reinforcing partition 2 on the left side shown in Figure 26 . Or, for another example, the second portion 25 may also extend from the lower end of the first portion 24 toward both sides in the thickness direction of the soft-pack battery cell 1, so that the reinforcing partition 2 is formed into an inverted T-shaped structure (for example, the reinforcing partition 2 on the right side shown in Figure 26 ).

[0364] In this way, the second portion 25 can be wrapped in the structural adhesive, so that the bottom of the soft-pack battery cell 1, the second portion 25 and the bottom plate 711 are fixed by the structural adhesive. In this way, the connection and heat transfer area between the reinforcing partition 3 and the box body 20 can be increased, the yield of rigid support can be improved, and when the reinforcing partition 3 is an inverted T-shaped structure, the second portion 25 can be separated between the bottoms of adjacent soft-pack battery cells 1 to form a fitting gap and the bottom plate 711, blocking the overflow of the structural adhesive to between adjacent soft-pack battery cells 1, reducing the probability of local hardening structure formed by the overflow of the adhesive between adjacent soft-pack battery cells 1, so as to improve the problem of local stress concentration between adjacent soft-pack battery cells 1 and reduce the risk of damage to the soft-pack battery cell 1.

[0365] Exemplarily, the second portion 25 can avoid directly below the bottom of the soft-pack battery cell 1 (for example, the reinforcing partition 2 on the right side shown in Figure 26 ), so that a direct heat conduction area can be formed between directly below the soft-pack battery cell 1 and the bottom plate 711. Or, the second portion 25 can also block directly below the bottom of the soft-pack battery cell 1 (for example, the reinforcing partition 2 on the left side shown in Figure 26 ), so that heat can be indirectly transferred between directly below the soft-pack battery cell 1 and the bottom plate 711 through the second portion 25.

[0366] In some embodiments of the present invention, the soft-pack battery cell 1 is any one of a lithium iron phosphate battery monomer, a ternary battery monomer, and a solid-state battery monomer.

[0367] Among them, the solid-state battery monomer may be, but is not limited to, a polymer solid-state battery monomer, an oxide solid-state battery monomer, a sulfide solid-state battery monomer, a halide solid-state battery monomer, and the like. The solid-state battery monomer may also be a semi-solid-state battery monomer or a full-solid-state battery monomer.

[0368] In the above technical solution, the soft-pack battery cell 1 of the above type can provide more choices for the design of the battery device to meet different usage requirements. Among them, the soft-pack battery cell 1 is a lithium iron phosphate battery monomer, which has the advantages of high reliability, long cycle life, light weight, large capacity, and small internal resistance; the soft-pack battery cell 1 is a ternary battery monomer, which has the advantages of high energy density and good electrochemical performance; the soft-pack battery cell 1 is a solid-state battery monomer, which has the advantages of high energy density, high reliability, light weight, and good high and low temperature performance.

[0369] In some embodiments of the present invention, the soft-pack battery cell 1 is a lithium iron phosphate battery monomer, and in the positive electrode material of the soft-pack battery cell 1, the dosage ratio of the positive electrode active material, the binder, and the conductive agent is 96:(1 - 3):(1 - 3); the soft-pack battery cell 1 is a ternary battery monomer, and in the positive electrode material of the soft-pack battery cell 1, the dosage ratio of the positive electrode active material, the binder, and the conductive agent is 96:(2 - 3):(1 - 2).

[0370] Exemplarily, the soft-pack battery cell 1 is a lithium iron phosphate battery monomer, and in the positive electrode material of the soft-pack battery cell 1, the ratio of the positive electrode active material, the binder, and the conductive agent is preferably LFP:PVDF:conductive carbon black = 96:2:2; LFP generally refers to LiFePO4.

[0371] Exemplarily, the soft-pack battery cell 1 is a ternary battery monomer, and in the positive electrode material of the soft-pack battery cell 1, the ratio of the positive electrode active material, the binder, and the conductive agent is preferably eight-series LiNi0.8Co0.1Mn0.1O2, and the ratio is preferably 96:2.5:1.5.

[0372] In some embodiments, the positive electrode of the soft-pack battery cell 1 can be a positive electrode plate, and the positive electrode plate can include a positive electrode current collector and a positive electrode film layer provided on at least one surface of the positive electrode current collector, and the positive electrode film layer includes a positive electrode active material.

[0373] As an example, the positive electrode current collector has two surfaces opposite to each other in its own thickness direction, and the positive electrode film layer is provided on any one or both of the two opposite surfaces of the positive electrode current collector.

[0374] As an example, the positive electrode current collector can be made of a metal foil or a composite current collector. For example, as a metal foil, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel, titanium, aluminum or stainless steel with silver surface treatment, etc. can be used. The composite current collector can include a polymer material base layer and a metal layer. The composite current collector can be formed by forming a metal material (such as aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0375] As an example, when the soft-pack battery cell 1 of the embodiment of the present utility model is a lithium-ion battery, the positive active material may include at least one of the following materials: phosphate, layered transition metal oxide, and their respective modified compounds; optionally, the positive active material may include layered transition metal oxide and their respective modified compounds, which is beneficial to improving the energy density of the soft-pack battery cell 1. However, the present utility model is not limited to these materials, and other traditional materials that can be used as the positive electrode film layer of the battery can also be used. These positive active materials can be used alone or in combination of two or more.

[0376] Examples of phosphates may include but are not limited to lithium iron phosphate (such as LiFePO 4 (which can also be abbreviated as LFP)), composite materials of lithium iron phosphate and carbon, lithium manganese phosphate (such as LiMnPO 4 ), composite materials of lithium manganese phosphate and carbon, lithium manganese iron phosphate, and at least one of composite materials of lithium manganese iron phosphate and carbon.

[0377] The layered transition metal oxide includes at least one of compounds with the general formula Li a Ni b Co c M d O e A f and their modified compounds. 0.8 ≤ a ≤ 1.2, 0.3 ≤ b < 1, 0 < c < 1, 0 < d < 1, 1 ≤ e ≤ 2, 0 ≤ f ≤ 1, M includes at least one of Mn, Al, Zr, Zn, Cu, Cr, Mg, Fe, V, Ti, and B, and A includes at least one of N, F, S, and Cl. Optionally, 0.5 ≤ b < 1, and further optionally, 0.75 ≤ b ≤ 0.98.

[0378] Examples of the layered transition metal oxide may include but are not limited to lithium cobalt oxide (such as LiCoO 2 ), lithium nickel oxide (such as LiNiO 2 ), lithium manganese oxide (such as LiMnO 2 , LiMn 2 O 4 ), lithium nickel cobalt oxide, lithium manganese cobalt oxide, lithium nickel manganese oxide, lithium nickel cobalt manganese oxide (such as LiNi 1 / 3 Co 1 / 3 Mn 1 / 3 O 2 (which can also be abbreviated as NCM 333 ), LiNi 0.5 Co 0.2 Mn 0.3 O 2 (which can also be abbreviated as NCM 523 ), LiNi 0.5 Co0.25 Mn 0.25 O 2 (also abbreviated as NCM 211 )、LiNi 0.6 Co 0.2 Mn 0.2 O 2 (also abbreviated as NCM 622 )、LiNi 0.8 Co 0.1 Mn 0.1 O 2 (also abbreviated as NCM 811 )、LiNi 0.9 Co 0.05 Mn 0.05 O 2 (also abbreviated as Ni90), lithium nickel cobalt aluminum oxide (such as LiNi 0.80 Co 0.15 Al 0.05 O 2 ) and at least one of its modified compounds, etc.

[0379] When the soft-pack battery cell 1 of the embodiment of the present utility model is a sodium-ion battery, the positive electrode active material may include, but is not limited to, at least one of sodium-containing transition metal oxides, polyanion materials (such as phosphates, fluorophosphates, pyrophosphates, sulfates, etc.), and Prussian blue-based materials.

[0380] As an example, the positive electrode active material for a sodium-ion battery may include NaFeO 2 , NaCoO 2 , NaCrO 2 , NaMnO 2 , NaNiO 2 , NaNi 1 / 2 Ti 1 / 2 O 2 , NaNi 1 / 2 Mn 1 / 2 O 2 , Na 2 / 3 Fe 1 / 3 Mn 2 / 3 O 2 , NaNi 1 / 3 Co 1 / 3 Mn 1 / 3 O 2 , NaFePO 4 , NaMnPO 4 , NaCoPO 4 , Prussian blue-based materials, with the general formula X p M’ q (PO 4 ) r Ox Y 3-x at least one of the materials. In the general formula X p M’ q (PO 4 ) r O x Y 3-x , 0 < p ≤ 4, 0 < q ≤ 2, 1 ≤ r ≤ 3, 0 ≤ x ≤ 2, X includes at least one of H+, Li+, Na+, K+ and NH4+, M’ is a transition metal cation, optionally at least one of V, Ti, Mn, Fe, Co, Ni, Cu and Zn, and Y is a halogen anion, optionally at least one of F, Cl and Br.

[0381] In the embodiments of the present invention, the modified compounds of the above-mentioned cathode active materials may be doping modification and / or surface coating modification of the cathode active materials, such as carbon coating modification, fast ion conductor coating modification, etc.

[0382] During the charge and discharge process of the soft-pack battery cell 1, the insertion and extraction and consumption of active ions such as Li will occur, and the molar content of Li is different when the soft-pack battery cell 1 is discharged to different states. In the list of cathode active materials in the embodiments of the present invention, the molar content of Li is the initial state of the material, that is, the state before feeding. When the cathode active material is applied to the battery system and undergoes charge and discharge cycles, the molar content of Li may change.

[0383] In the list of cathode active materials in the embodiments of the present invention, the molar content of oxygen O is only the theoretical state value, and the release of oxygen from the lattice will cause the molar content of oxygen O to change. Actually, the molar content of oxygen O will show fluctuations.

[0384] In the embodiments of the present invention, the content of elements in the cathode active material has the meaning well-known in the art, and can be detected by equipment and methods well-known in the art. For example, referring to EPA 6010D-2014, it is tested by inductively coupled plasma atomic emission spectrometry, and determined by inductively coupled plasma optical emission spectrometry (ICP-OES, instrument model: Thermo ICAP7400). First, weigh 0.4 g of the cathode active material and add 10 ml (50% concentration) of aqua regia to it. Then place it on a flat plate at 180 °C for 30 min. After digestion on the flat plate, make up the volume to 100 mL, and quantitative testing is carried out by the standard curve method.

[0385] In some embodiments, the positive electrode may employ a foam metal. The foam metal may be nickel foam, copper foam, aluminum foam, foam alloy, or carbon foam, etc. When the foam metal serves as the positive electrode, a positive electrode film layer may not be provided on the surface of the foam metal, although it may also be provided. As an example, a lithium source material, potassium metal, or sodium metal may also be filled and / or deposited in the foam metal, and the lithium source material is lithium metal and / or lithium-rich material.

[0386] In some embodiments, the positive electrode film layer may further optionally include a positive electrode conductive agent. The embodiments of the present utility model do not particularly limit the type of the positive electrode conductive agent. As an example, the positive electrode conductive agent includes at least one of superconducting carbon, conductive graphite, acetylene black, carbon black, Ketjen black, carbon dots, carbon nanotubes, graphene, and carbon nanofibers. In some embodiments, the mass percentage content of the positive electrode conductive agent in the positive electrode film layer is ≤5 wt%.

[0387] In some embodiments, the positive electrode film layer may further optionally include a positive electrode binder. The embodiments of the present utility model do not particularly limit the type of the positive electrode binder. As an example, the positive electrode binder may include at least one of polyvinylidene fluoride (PVDF), polytetrafluoroethylene (PTFE), vinylidene fluoride-tetrafluoroethylene-propylene terpolymer, vinylidene fluoride-hexafluoropropylene-tetrafluoroethylene terpolymer, tetrafluoroethylene-hexafluoropropylene copolymer, and fluorinated acrylate resin. In some embodiments, the mass percentage content of the positive electrode binder in the positive electrode film layer is ≤5 wt%.

[0388] The positive electrode film layer is generally formed by coating a positive electrode slurry on a positive electrode current collector and then drying and cold pressing. The positive electrode slurry is generally formed by dispersing a positive electrode active material, an optional conductive agent, an optional binder, and any other components in a solvent and stirring evenly. The solvent may be N-methylpyrrolidone (NMP), but is not limited thereto.

[0389] In some embodiments, the negative electrode may be a negative electrode plate, and the negative electrode plate may include a negative electrode current collector and a negative electrode film layer provided on at least one surface of the negative electrode current collector, and the negative electrode film layer includes a negative electrode active material.

[0390] As an example, the negative electrode current collector has two surfaces opposite to each other in its own thickness direction, and the negative electrode film layer is provided on any one or both of the two opposite surfaces of the negative electrode current collector.

[0391] As an example, the negative electrode current collector can be a metal foil, a foam metal, or a composite current collector. For example, as the metal foil, aluminum or stainless steel with a silver surface treatment, copper, aluminum, nickel, carbon electrodes, carbon, nickel, titanium, etc. can be used. The foam metal can be foam nickel, foam copper, foam aluminum, foam alloy, or foam carbon, etc. The composite current collector can include a polymer material substrate layer and a metal layer. The composite current collector can be formed by forming a metal material (such as copper, copper alloy, nickel, nickel alloy, titanium, titanium alloy, silver, and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0392] As an example, the negative electrode active material can be a negative electrode active material known in the art for soft-pack battery cells. As an example, the negative electrode active material can include at least one of the following materials: carbon materials (for example, the carbon materials include at least one of artificial graphite, natural graphite, soft carbon, and hard carbon), silicon-based materials, tin-based materials, and lithium titanate, etc. The silicon-based materials can include at least one of elemental silicon, silicon oxides, silicon-carbon composites, silicon-nitrogen composites, and silicon alloys. The tin-based materials can include at least one of elemental tin, tin oxides, and tin alloys. However, the present invention is not limited to these materials, and other conventional materials that can be used as the battery negative electrode film layer can also be used. These negative electrode film layers can be used alone or in combination of two or more.

[0393] In some embodiments, the negative electrode active material includes silicon element, and the silicon element can exist in the form of silicon-based materials. For example, the silicon-based materials can include at least one of elemental silicon, silicon oxides, silicon-carbon composites, silicon-nitrogen composites, and silicon alloys. The introduction of the silicon element can improve the energy density of the soft-pack battery cell.

[0394] In some embodiments, the mass content of the silicon element in the negative electrode film layer is 1 wt% to 32 wt%, optionally 2 wt% to 19 wt%, and further optionally 6 wt% to 13 wt%. In the soft-pack battery cell 1 system, when the mass content of the silicon element is within the above range, the energy density of the soft-pack battery cell 1 can be improved.

[0395] In the embodiments of the present invention, the mass content of the silicon element in the negative electrode film layer has the meaning known in the art, and can be detected by using the equipment and methods known in the art. For example, the negative electrode plate is placed in a solvent such as water and soaked to separate the negative electrode active material from the negative electrode current collector, and the negative electrode active material is obtained by suction filtration. The negative electrode active material is analyzed by using an inductively coupled plasma - emission spectrometer of model ICAP7400 of Thermo Fisher Scientific Company in the United States, and referring to the standard of GB / T30902 - 2014, the content of the silicon element can be obtained.

[0396] In some embodiments, the negative electrode film layer may further optionally include a negative electrode conductive agent. There is no particular limitation on the type of the negative electrode conductive agent in the embodiments of the present invention. As an example, the negative electrode conductive agent may include at least one of superconducting carbon, conductive graphite, acetylene black, carbon black, Ketjen black, carbon dots, carbon nanotubes, graphene, and carbon nanofibers. In some embodiments, the mass percentage content of the negative electrode conductive agent in the negative electrode film layer is ≤5 wt%.

[0397] In some embodiments, the negative electrode film layer may further optionally include a negative electrode binder. There is no particular limitation on the type of the negative electrode binder in the embodiments of the present invention. As an example, the negative electrode binder may include at least one of styrene-butadiene rubber (SBR), water-soluble unsaturated resin SR-1B, water-based acrylic resin (for example, polyacrylic acid PAA, polymethacrylic acid PMAA, sodium polyacrylate PAAS), polyacrylamide (PAM), polyvinyl alcohol (PVA), sodium alginate (SA), and carboxymethyl chitosan (CMCS). In some embodiments, the mass percentage content of the negative electrode binder in the negative electrode film layer is ≤5%.

[0398] In some embodiments, the negative electrode film layer may further optionally include other additives. As an example, the other additives may include thickeners, such as sodium carboxymethyl cellulose (CMC-Na), PTC thermistor materials, etc. In some embodiments, the mass percentage content of the other additives in the negative electrode film layer is ≤2 wt%.

[0399] In some embodiments, the material of the positive electrode current collector can be aluminum, and the material of the negative electrode current collector can be copper.

[0400] In some embodiments, the separator includes a separator membrane. There is no particular limitation on the type of the separator membrane in the present invention, and any well-known porous structure separator membrane with good chemical stability and mechanical stability can be selected.

[0401] There is no particular limitation on the type of the separator membrane in the embodiments of the present invention, and any well-known porous structure separator membrane with good chemical stability and mechanical stability can be selected.

[0402] In some embodiments, the material of the separator membrane may include one or more of glass fiber, non-woven fabric, polyethylene, polypropylene, and polyvinylidene fluoride. The separator membrane can be a single-layer film or a multi-layer composite film, without particular limitation. When the separator membrane is a multi-layer composite film, the materials of each layer can be the same or different, without particular limitation.

[0403] In some embodiments, the separator membrane may include a porous base film and a coating provided on at least one side of the porous base film, and the coating may include at least one of inorganic particles or organic particles.

[0404] The porous base film may include one or more of polyethylene and polypropylene.

[0405] The inorganic particles have good heat resistance and can improve the overall heat resistance of the separator film. The inorganic particles basically do not undergo oxidation and reduction reactions with metal dendrites within the working voltage range of the sodium-ion battery. In other words, the inorganic particles are configured not to undergo oxidation and reduction reactions with alkali metals and / or alkaline earth metals at the nominal voltage of the sodium-ion battery.

[0406] In some embodiments, the inorganic particles include boehmite γ-AlOOH, alumina Al 2 O 3 , aluminum hydroxide Al(OH) 3 , barium sulfate BaSO 4 , magnesium oxide MgO, magnesium hydroxide Mg(OH) 2 , calcium oxide CaO, cerium oxide CeO 2 , strontium titanate SrTiO 3 , barium titanate BaTiO 3 and magnesium fluoride MgF 2 and one or more of them.

[0407] In some embodiments, the organic particles include at least one of polystyrene, polyethylene, polyimide, melamine resin, phenolic resin, polypropylene, polyester (such as polyethylene terephthalate, polyethylene naphthalate, polybutylene terephthalate), polyphenylene sulfide, polyaramide, polyamideimide, polyimide, copolymer of butyl acrylate and ethyl methacrylate, and mixtures thereof.

[0408] In some embodiments, the soft-pack battery cell 1 further includes an electrolyte.

[0409] During the charge and discharge process of the battery cell, active ions are embedded and extracted back and forth between the positive electrode plate and the negative electrode plate, and the electrolyte plays a role in conducting active ions between the positive electrode plate and the negative electrode plate. The embodiments of the present utility model do not have any particular limitations on the type of the electrolyte, and it can be selected according to actual needs.

[0410] The electrolyte includes an electrolyte salt and a solvent. The types of the electrolyte salt and the solvent are not specifically limited and can be selected according to actual needs.

[0411] In some embodiments, the electrolyte may also optionally include additives. For example, the additives may include negative electrode film-forming additives, or may include positive electrode film-forming additives, or may also include additives that can improve certain performance of the battery, such as additives for improving the overcharge performance of the battery, additives for improving the high-temperature performance of the battery, additives for improving the low-temperature power performance of the battery, and the like.

[0412] For example, the additive includes at least one of a cyclic carbonate compound containing an unsaturated bond, a sulfate compound, a sulfite compound, a sultone compound, a disulfonic acid compound, a nitrile compound, an aromatic compound, an isocyanate compound, a phosphazene compound, an acid anhydride, a cyclic acid anhydride compound, a phosphite compound, a phosphate compound, a borate ester, and a carboxylic acid ester compound.

[0413] It can be understood that when the soft-pack battery cell 1 is a lithium iron phosphate battery monomer, in the positive electrode material of the soft-pack battery cell 1, the positive electrode active material accounts for 96 parts by weight of the total weight of the positive electrode material, the binder accounts for 1 to 3 parts by weight of the total weight of the positive electrode material (for example, it can include but is not limited to 1, 1.2, 1.5, 1.8, 2, 2.2, 2.5, 2.8, 3, etc.), and the conductive agent accounts for 1 to 3 parts by weight of the total weight of the positive electrode material (for example, it can include but is not limited to 1, 1.2, 1.5, 1.8, 2, 2.2, 2.5, 2.8, 3, etc.).

[0414] Exemplarily, when the soft-pack battery cell 1 is a lithium iron phosphate battery monomer, the positive electrode active material is LFP (which can refer to LiFePO 4 , that is, lithium iron phosphate), the binder can be PVDF (polyvinylidene fluoride), and the conductive agent can be conductive carbon black. Among them, LFP:PVDF:conductive carbon black can be 96:2:2. That is to say, the total weight of the positive electrode active material is divided into 100 parts, LFP accounts for 96 parts, PVDF accounts for 2 parts, and conductive carbon black also accounts for 2 parts. Among them, the weight unit of the positive electrode active material can be grams.

[0415] When the soft-pack battery cell 1 is a ternary battery monomer, in the positive electrode material of the soft-pack battery cell 1, the positive electrode active material accounts for 96 parts by weight of the total weight of the positive electrode material, the binder accounts for 2 to 3 parts by weight of the total weight of the positive electrode material (for example, it can include but is not limited to 2, 2.2, 2.5, 2.8, 3, etc.), and the conductive agent accounts for 1 to 2 parts by weight of the total weight of the positive electrode material (for example, it can include but is not limited to 1, 1.2, 1.5, 1.8, 2, etc.). Among them, the ternary battery monomer can be but is not limited to lithium nickel cobalt manganate series, lithium nickel cobalt aluminate series, etc.

[0416] Exemplarily, the ternary material of the ternary battery monomer can be octahedral LiNi 0.8 Co 0.1 Mn 0.1 O 2 , and the weight ratio of the positive electrode active material, the binder, and the conductive agent is 96:2.5:1.5. That is to say, the total weight of the positive electrode material is divided into 100 parts, octahedral LiNi 0.8 Co 0.1 Mn 0.1 O 2The proportion is 96 parts, the proportion of the binder is 2.5 parts, and the proportion of the conductive agent is 1.5 parts.

[0417] In the above technical solution, when the soft-pack battery cell 1 is a lithium iron phosphate battery monomer, a high proportion of the positive electrode active material means that more substances capable of undergoing electrochemical reactions can be accommodated within a limited electrode assembly, which is beneficial to increasing the capacity and energy density of the battery device 100. This enables the lithium iron phosphate battery monomer to output a higher amount of electricity under relatively small volume and weight, meeting application scenarios with certain requirements for energy density. Using the above ranges for the amounts of the binder and the conductive agent can reduce the cost of auxiliary materials, thereby reducing the overall cost of the battery device 100. When the soft-pack battery cell 1 is a ternary battery monomer, due to the relatively complex structure and surface properties of the ternary material itself, using the above dosage ratios of the positive electrode active material, the binder, and the conductive agent is beneficial to ensuring good adhesion between the positive electrode active material particles and between the active material and the current collector, thereby improving the mechanical stability and integrity of the electrode assembly, reducing the risk of shedding of the active material and electrode pulverization during charge and discharge, and extending the cycle life of the battery device 100.

[0418] Other components and operations of the battery device 100 of this embodiment are known to those of ordinary skill in the art and will not be described in detail here.

[0419] In a second aspect, an electrical device provided by an embodiment of the present invention further includes the battery device 100 of any of the above solutions.

[0420] In the above technical solution, since the performance of the battery device 100 is improved, it is beneficial to improving the working power consumption performance of the electrical device.

[0421] Next, the battery device 100 according to a specific embodiment of the present invention will be described.

[0422] The battery device 100 includes: a battery cell row 10 and a box body 20. The battery cell row 10 is disposed inside the box body 20. The length direction of the box body 20 is the first direction F1, the width direction of the box body 20 is the second direction F2, and the height direction of the box body 20 is the third direction F3.

[0423] Two battery modules 101 are arranged in the box body 20 along the second direction F2. Each battery module 101 includes two battery cell rows 10 arranged along the first direction F1. Each battery cell row 10 includes a plurality of soft-pack battery cells 1 arranged along the first direction F1. The length direction of the soft-pack battery cell 1 extends along the second direction F2, the width direction of the soft-pack battery cell 1 extends along the third direction F3, and the first direction F1 is the thickness direction of the soft-pack battery cell 1.

[0424] The battery cell row 10 further includes a reinforcing partition 2 and a buffer member 3, and the reinforcing partition 2 and the buffer member 3 are alternately arranged along the first direction F1. The length direction of the reinforcing partition 2 is the same as the length direction of the soft-pack battery cell 1, the width direction of the reinforcing partition 2 is the same as the width direction of the soft-pack battery cell 1, the length direction of the buffer member 3 is the same as the length direction of the soft-pack battery cell 1, and the width direction of the buffer member 3 is the same as the width direction of the soft-pack battery cell 1.

[0425] The reinforcing partition 2 is an aluminum plate and is adhered to the soft-pack battery cell 1 with double-sided tape. The reinforcing partition 2 is clamped between two adjacent soft-pack battery cells 1, and the number of reinforcing partitions 2 clamped between two adjacent soft-pack battery cells 1 is one, so that two adjacent soft-pack battery cells 1 share the stiffness of the reinforcing partition 2. The buffer member 3 is clamped between two adjacent soft-pack battery cells 1, and the number of buffer members 3 clamped between two adjacent soft-pack battery cells 1 is one, so that two adjacent soft-pack battery cells 1 share the expansion space provided by the buffer member 3.

[0426] The bottom of the soft-pack battery cell 1 and the bottom plate 711 of the box body 20 are connected together with structural adhesive, which can ensure the connection stiffness below; the reinforcing partition 2 is fixedly connected to the upper end of the mounting bracket 8 through the connecting portion 23, and the mounting bracket 8 and the box body main body 7 are mechanically connected (screwed or riveted or welded, etc.) together, which can ensure the connection stiffness above. Adjacent soft-pack battery cells 1 are connected through the conductive member 12, and the conductive member 12 and the connecting portion 23 are arranged along the third direction F3 to make full use of the space in the third direction F3 and save the occupation of other spaces. Thereby, the stiffness of the soft-pack battery cell 1 in the length, width, and thickness directions is improved, and the reliability of the battery device 100 is improved.

[0427] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0428] The above is only the preferred embodiment of the present invention and is not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A battery device, characterized in that: include: Box; A battery cell row is bonded and disposed in the box, wherein the battery cell row comprises a plurality of soft-pack battery cells stacked along a thickness direction; Among them, a reinforcing partition is provided between the large surfaces of at least two adjacent soft-pack batteries in the battery cell row, the reinforcing partition is connected to the box body, the stiffness of the reinforcing partition is greater than the stiffness of the soft-pack shell of the soft-pack battery cell, and the reinforcing partition is heat exchanged with the soft-pack battery cell.

2. The battery device according to claim 1, characterized in that: The battery device comprises a box body for loading the battery cell row, and the edge of the reinforcing partition has a connecting portion protruding from the soft-pack battery cell, and the connecting portion is used to form a connection with the box body.

3. The battery device according to claim 2, characterized in that: The box body comprises a box body and a mounting bracket, the mounting bracket is mounted in the box body, and the connecting portion is connected to the mounting bracket.

4. The battery device according to claim 3, characterized in that: The soft-packed cells in the cell row are arranged along the thickness direction of the soft-packed cells, the width direction of the soft-packed cells is the vertical direction, the length direction of the soft-packed cells is the horizontal direction, and the mounting bracket is arranged on one side of the length direction of the soft-packed cells.

5. The battery device according to claim 4, characterized in that: The upper end of the mounting bracket is lower than the upper end of the soft-pack battery cell to form an upper avoidance space above the mounting bracket, and the connecting portion is connected to the mounting bracket at a position lower than the upper avoidance space.

6. The battery device according to claim 4, characterized in that: The connecting portion is connected to the upper portion of the mounting bracket, and the lower end of the connecting portion is higher than the lower end of the mounting bracket to form a lower air avoidance space below the connecting portion. The soft-pack battery cell has a conductive member electrically connected to the electrode assembly of the soft-pack battery cell, and at least a portion of the conductive member is exposed outside the soft-pack shell and is located in the lower air avoidance space.

7. The battery device according to claim 3, characterized in that: One of the mounting brackets is connected to at least two of the connecting parts.

8. The battery device according to claim 7, characterized in that: The mounting bracket includes a plurality of side walls spaced apart along the arrangement direction of the soft-pack battery cells in the battery cell row, each of the side walls is respectively arranged corresponding to one of the connecting parts, and the connecting part is connected to the side wall.

9. The battery device according to claim 7, characterized in that: There are multiple mounting brackets and they are arranged along the arrangement direction of the soft-pack batteries in the battery cell row. Each mounting bracket includes two side walls and a connecting wall connecting the two side walls. The adjacent side walls of two adjacent mounting brackets clamp the same connecting portion.

10. The battery device according to claim 3, characterized in that: One of the length direction and the width direction of the box body is a first direction, and the other is a second direction. The height direction of the box body is a third direction. The soft-pack batteries in the battery cell row are arranged along the first direction. The first direction is the thickness direction of the soft-pack batteries. The second direction is the length direction of the soft-pack batteries. The third direction is the width direction of the soft-pack batteries. The mounting brackets are respectively provided at both ends of the box body in the second direction.

11. The battery device according to claim 10, characterized in that: Each end of the box body in the second direction is respectively provided with a plurality of the mounting brackets arranged along the first direction.

12. The battery device according to claim 10, characterized in that: A battery module is provided in the box body, and the battery module includes two battery cell rows arranged along the second direction, wherein all the soft-pack battery cells in each battery cell row are stacked in sequence along the thickness direction of the soft-pack battery cells; the ends of the two battery cell rows in the same battery module that are away from each other in the second direction are respectively connected to the mounting brackets on the corresponding sides.

13. The battery device according to claim 12, characterized in that: The length direction of the reinforcing partition extends along the second direction, and the two ends of the length of the reinforcing partition extend to the two ends of the battery module in the second direction respectively, so that the two battery cell rows in the battery module share the reinforcing partition, and the two ends of the length of the reinforcing partition are respectively connected to the mounting brackets at the two ends of the box in the second direction.

14. The battery device according to claim 1, characterized in that: The battery device includes a box for loading the battery cell row, the box includes cover plates arranged on both sides of the battery cell row along the height direction of the box, the cover plates on both sides are a top plate and a bottom plate respectively, the box also includes: a heat exchange plate, the heat exchange plate is arranged between the battery cell row and the cover plate, and is used for heat exchange with the battery cell row.

15. The battery device according to claim 14, characterized in that: The width direction of the soft-pack battery core is consistent with the height direction of the box body, and the surface of the soft-pack shell on one side facing the heat exchange plate in the width direction of the soft-pack battery core is flat and connected to the heat exchange plate through a heat conductive medium.

16. The battery device according to claim 3, characterized in that: The box body includes cover plates arranged on both sides of the battery cell row along the height direction of the box body, and the cover plates on both sides are a top plate and a bottom plate respectively. The box body also includes: a heat exchange plate, which is arranged between the battery cell row and the bottom plate and is used for heat exchange with the battery cell row, and the mounting bracket is arranged on the top of the heat exchange plate.

17. The battery device according to claim 1, characterized in that: The thickness of the reinforcing partition is smaller than the thickness of the soft-pack battery cell.

18. The battery device according to claim 17, characterized in that: The thickness of the reinforced partition is 0.8 mm to 2.0 mm.

19. The battery device according to claim 1, characterized in that: The reinforcing partition is a metal plate.

20. The battery device according to claim 19, characterized in that The reinforcing partition is an aluminum plate, an aluminum alloy plate, a copper plate or a steel plate.

21. The battery device according to claim 1, characterized in that The reinforced partition is a solid structure.

22. The battery device according to claim 1, characterized in that A cavity is formed in the reinforced partition.

23. The battery device according to claim 22, characterized in that The cavity includes a heat exchange flow channel for arranging a heat exchange medium.

24. The battery device according to claim 23, characterized in that The heat exchange channel runs from one end of the reinforcing partition to the other end of the reinforcing partition.

25. The battery device according to claim 22, characterized in that: Reinforcing ribs are arranged in the cavity.

26. The battery device according to claim 1, characterized in that The length direction of the reinforcing partition extends along the length direction of the soft-pack battery cell, wherein the length of the reinforcing partition is greater than 80% of the length of the soft-pack battery cell; and / or the width of the reinforcing partition is greater than 80% of the width of the soft-pack battery cell.

27. The battery device according to claim 26, characterized in that A plurality of adjacent rows of cells arranged along the length direction of the soft-pack cells share the reinforcing partition.

28. The battery device according to claim 27, characterized in that The length of the reinforcing partition is greater than twice the length of the soft-pack battery cell, so that two adjacent rows of batteries arranged along the length direction of the soft-pack battery cell share the reinforcing partition.

29. The battery device according to claim 26, characterized in that The width of the reinforcing partition is smaller than the width of the soft-pack battery cell.

30. The battery device according to claim 1, characterized in that The reinforcing partition is bonded to the soft-pack battery cell.

31. The battery device according to claim 30, characterized in that The reinforcing partition is bonded and fixed to the soft-pack battery core by double-sided adhesive.

32. The battery device according to claim 1, characterized in that The battery cell row includes a plurality of reinforcing partitions arranged along the thickness direction of the soft-pack battery cells, and two reinforcing partitions are adjacently arranged along the thickness direction and disposed on both sides of at least one soft-pack battery cell in the thickness direction, and are connected by a connecting plate located in the peripheral area of ​​the soft-pack battery cell.

33. The battery device according to claim 32, characterized in that The connecting plate is arranged between the two reinforcing partitions connected thereto, and is integrally connected with the two reinforcing partitions connected thereto to form a U-shaped shell.

34. The battery device according to claim 1, characterized in that The reinforcing partition is sandwiched between every two adjacent soft-pack battery cells in the battery cell row.

35. The battery device according to claim 1, characterized in that A plurality of the soft-pack battery cells are sandwiched between two adjacent reinforcing partitions in the battery cell row.

36. The battery device according to claim 35, characterized in that The number of the soft-pack battery cells sandwiched between two adjacent reinforcing partitions in the battery cell row is less than or equal to four.

37. The battery device according to claim 1, characterized in that A buffer is sandwiched between at least two adjacent soft-pack battery cells in the battery cell row, and the rigidity of the buffer is smaller than the rigidity of the soft-pack shell.

38. The battery device according to claim 37, characterized in that The buffer member and the reinforcing partition are disposed between at least two adjacent soft-pack battery cells in the battery cell row.

39. The battery device according to claim 38, characterized in that The buffer member is sandwiched between two adjacent reinforcing partitions to form a partition group, and the partition group is arranged between two adjacent soft-pack battery cells.

40. The battery device according to claim 37, characterized in that At most one of the buffer and the reinforcing partition is provided between any two adjacent soft-pack battery cells in the battery cell row.

41. The battery device according to claim 37, characterized in that At least one of the soft-pack battery cells in the battery cell row is sandwiched between the buffer and the reinforcing partition.

42. The battery device according to claim 41, characterized in that The buffer members and the reinforcing partitions in the battery cell row are arranged alternately.

43. The battery device according to claim 37, characterized in that The buffer component covers more than 80% of the area of ​​the thickness side surface of the soft-pack battery core; and / or the buffer component is a foam layer or a silicone layer.

44. The battery device according to claim 1, characterized in that The battery cell row is provided with buffers at both ends of the soft-pack battery cells in the thickness direction, the buffers have a stiffness less than that of the soft-pack shell, and all the soft-pack battery cells in the battery cell row are sandwiched between the buffers at both ends.

45. The battery device according to claim 1, characterized in that The soft-pack battery cell includes a conductive member, which is electrically connected to an electrode assembly of the soft-pack battery cell and at least partially exposed outside the soft-pack shell; two adjacent soft-pack battery cells in the battery cell row are connected via the conductive member.

46. ​​The battery device according to claim 45, characterized in that The two conductive members constituting the connection are overlapped and connected, and at least one of the conductive members is in a bent shape.

47. The battery device according to claim 45, characterized in that The two conductive members constituting the connection are connected via an adapter sheet, and the adapter sheet is in a bent shape.

48. The battery device according to claim 45, characterized in that The conductive members are respectively disposed at two ends of the soft-pack battery cell in the length direction, and the conductive members at adjacent ends of two adjacent soft-pack battery cells in the length direction are connected.

49. The battery device according to claim 48, characterized in that The polarities of the two conductive members at both ends of the soft-pack battery cell in the length direction are opposite, and the polarities of the two conductive members forming the connection are the same or opposite.

50. The battery device according to claim 48, characterized in that The battery cell row includes at least three soft-pack battery cells, and among the two conductive parts of the soft-pack battery cells located between two adjacent soft-pack battery cells in the battery cell row, one conductive part is connected to the conductive part on the same side of an adjacent soft-pack battery cell, and the other conductive part is connected to the conductive part on the same side of another adjacent soft-pack battery cell.

51. The battery device according to claim 48, characterized in that The battery device includes a box for loading the battery cell rows, wherein a battery module is arranged in the box, and the battery module includes two battery cell rows arranged along the length direction of the soft-pack battery cells, wherein all the soft-pack battery cells in each battery cell row are stacked in sequence along the thickness direction of the soft-pack battery cells; the two battery cell rows in the same battery module are connected to the conductive parts on the side close to each other in the length direction of the soft-pack battery cells.

52. The battery device according to claim 48, characterized in that The battery device includes a box for loading the battery cell row, the edge of the reinforcing partition has a connecting portion protruding from the soft-pack battery cell along the length direction of the soft-pack battery cell, the connecting portion is used to form a connection with the box, and is spaced apart from the conductive member along the width direction of the soft-pack battery cell.

53. The battery device according to claim 1, characterized in that The soft-pack shell includes two membrane portions arranged and connected along the thickness direction of the soft-pack battery cell, and the two membrane portions each define a receiving groove. The receiving grooves of the two membrane portions are open in directions facing each other along the thickness direction of the soft-pack battery cell, and together constitute a receiving cavity of the soft-pack shell, and the electrode assembly of the soft-pack battery cell is arranged in the receiving cavity.

54. The battery device according to claim 53, characterized in that The wall thickness of the membrane portion is less than or equal to 0.2 mm, the dimension of the soft-pack battery cell in the thickness direction of the soft-pack battery cell is a first dimension, the dimension of the membrane portion in the thickness direction of the soft-pack battery cell is a second dimension, the ratio of the second dimension to the first dimension is greater than or equal to 0.4 and less than or equal to 0.6, and the first dimension is greater than or equal to 5 mm and less than or equal to 70 mm.

55. The battery device according to claim 53, characterized in that The two membrane parts are separate parts and have edge sealing structures around the soft-pack battery core.

56. The battery device according to claim 53, characterized in that The two membrane parts are an integrated piece and one long side and two wide sides around the soft-pack battery core respectively have edge sealing structures.

57. The battery device according to claim 1, characterized in that The battery device includes a box for loading the battery cell row, the box includes a top plate and a bottom plate arranged on both sides of the battery cell row along the height direction of the box, the width direction of the soft-pack battery cell is consistent with the height direction of the box, and structural adhesive is filled between the battery cell row and the bottom plate.

58. The battery device according to claim 57, characterized in that The structural adhesive is a thermally conductive adhesive.

59. The battery device according to claim 58, characterized in that A rubber blocking strip is provided in the box body, the bottom plate is located below the battery cell row, a fitting gap is formed between the bottoms of two adjacent soft-pack battery cells arranged along the thickness direction of the soft-pack battery cells, and the rubber blocking strip is located between the fitting gap and the bottom plate.

60. The battery device according to claim 59, characterized in that Two adjacent soft-pack battery cells share one rubber blocking strip.

61. The battery device according to claim 60, characterized in that The blocking rubber strip is a blocking rubber foam, and the blocking rubber strip is bonded to the bottom plate; or, the blocking rubber strip is a strip with adhesive on one side, and the blocking rubber strip is bonded to the bottom of the soft-pack battery cell.

62. The battery device according to claim 60, characterized in that The reinforcing partition is an inverted T-shaped or L-shaped structure, and includes a first portion located between adjacent soft-pack battery cells and a second portion located below the soft-pack battery cells, wherein the second portion is located between the bottom of the soft-pack battery cells and the bottom plate.

63. The battery device according to any one of claims 1 to 62, characterized in that: The soft-pack battery cell is any one of a lithium iron phosphate battery cell, a ternary battery cell and a solid-state battery cell.

64. An electrical device, characterized in that: Comprising a battery device according to any one of claims 1-63.

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