Battery device and electric device

Abstract

A battery device and a power utilization device belong to the technical field of batteries. The battery device comprises a plurality of battery cell groups, the plurality of battery cell groups are stacked along a first direction, and each battery cell group comprises at least one soft package battery cell; one end, along the second direction, of each cell group located between the two ends of the first direction is electrically connected with the upstream cell group along the first direction, and the other end, along the second direction, of each cell group is electrically connected with the downstream cell group along the first direction; wherein a flexible bending conductive structure is formed at the connection position of the two mutually connected battery cell groups, and an included angle is formed between the first direction and the second direction. According to the technical scheme, the production efficiency of the battery device is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery device and an electrical device. Background Art

[0002] In recent years, new energy vehicles have developed by leaps and bounds. 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 cells, however, the production efficiency of such power batteries is low. Utility Model Content

[0003] The embodiments of the present application provide a battery device and an electrical device, which are beneficial to improving the production efficiency of the battery device.

[0004] In a first aspect, an embodiment of the present application provides a battery device, comprising a plurality of battery cell groups, wherein the plurality of battery cell groups are stacked along a first direction, and each battery cell group comprises at least one soft-pack battery cell; each battery cell group located between two ends of the first direction is electrically connected to the battery cell group upstream along the first direction at one end along the second direction, and is electrically connected to the battery cell group downstream along the first direction at the other end along the second direction; wherein the connection positions of two interconnected battery cell groups form a flexible bent conductive structure, and the first direction and the second direction are arranged at an angle.

[0005] In the above technical solution, by connecting every two adjacent battery cell groups together and bending the connection position to achieve stacking of two adjacent battery cell groups along the first direction, and then by electrically connecting one end of the battery cell group along the second direction to the battery cell group upstream along the first direction, and electrically connecting the other end of the battery cell group along the second direction to the battery cell group downstream along the first direction, the grouping efficiency can be effectively improved, and the production efficiency of the battery device can be improved. Moreover, since the connection of adjacent battery cell groups does not need to pass through the conductive bracket, the operating space of the adjacent battery cell groups during connection is larger, thereby reducing the difficulty of the connection operation, and the connection quality is also easy to detect, and the connection position is also easy to repair, so that the reliability of the battery device can be improved. Moreover, since the conductive bracket is omitted and the parts are reduced, the weight and cost of the battery device can be reduced, and the space occupied by the conductive bracket is also omitted, which is conducive to improving the energy density of the battery device.

[0006] In some embodiments, the thickness direction of the soft-pack battery cell is a first direction, and the battery cell group includes one soft-pack battery cell or includes a plurality of soft-pack battery cells arranged flat on a plane perpendicular to the first direction.

[0007] In the above technical solution, the total thickness of the plurality of battery cell groups stacked along the first direction is small, and the space occupied is small. The flexible bending conductive structure is bent along the thickness direction of the soft-pack battery cell. The length required for the flexible bending conductive structure is short, not easy to break, and the conductivity is reliable. In addition, when the battery cell group includes a plurality of soft-pack battery cells laid flat on a plane perpendicular to the first direction, the connection of the plurality of soft-pack battery cells in the battery cell group does not need to introduce a bending process, thereby improving the grouping efficiency.

[0008] In some embodiments, a plurality of soft-pack battery cells arranged flatly in the battery cell group are arranged along the second direction, and two adjacent soft-pack battery cells are connected at adjacent positions.

[0009] In the above technical solution, grouping can be achieved quickly to improve production efficiency.

[0010] In some embodiments, the battery device includes a first battery cell row, the first battery cell row includes a plurality of battery cell groups stacked along a first direction, and each battery cell group in the first battery cell row includes one soft-pack battery cell.

[0011] In the above technical solution, by setting the number of soft-pack cells included in each cell group in the first cell row to one, the structure of the first cell row is simple and the grouping efficiency is high. It is also beneficial to increase the operating space when connecting two adjacent cell groups, reduce the difficulty of connecting two adjacent cell groups, and the connection quality is easy to detect and the connection position is easy to repair, so that the production capacity and reliability of the battery device can be improved.

[0012] In some embodiments, 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, and the ends of two adjacent soft-pack battery cells on the same side are connected by a flexible bent conductive structure.

[0013] In the above technical solution, by setting the first direction as the thickness direction of the soft-pack battery cell, and setting the second direction as the length direction of the soft-pack battery cell, the ends of the same side of the length direction of two adjacent soft-pack battery cells are connected through a flexible bending conductive structure, and the two adjacent soft-pack battery cells are stacked along the thickness direction, so that both the connection of the two adjacent soft-pack battery cells and the bending of the flexible bending conductive structure are very convenient, thereby reducing the processing difficulty of the first battery cell row, shortening the length of the flexible bending conductive structure, and saving costs.

[0014] In some embodiments, the length of each soft-pack battery cell in the first battery cell row is the same and the width of each soft-pack battery cell is the same.

[0015] In the above technical solution, the specifications of multiple soft-pack batteries can be almost the same, which is conducive to the processing of soft-pack batteries, and when arranging, there is no need to consider the differences between the shapes of different soft-pack batteries to affect the arrangement, thereby improving production efficiency. In addition, it is also conducive to aligning the two side edges in the width direction and the two side edges in the length direction of each adjacent two soft-pack batteries in the first battery cell row, and the space occupied by all the soft-pack batteries in the first battery cell row in the length direction of the soft-pack batteries is consistent with the space occupied by one soft-pack battery in the length direction, and the space occupied by all the soft-pack batteries in the first battery cell row in the width direction of the soft-pack batteries is consistent with the space occupied by one soft-pack battery in the width direction. As a result, the space occupied by the entire first battery cell row along the length direction and width direction of the soft-pack batteries is greatly reduced, which is conducive to improving the energy density of the battery device.

[0016] In some embodiments, the battery device includes a plurality of first battery cell rows arranged along a second direction.

[0017] In the above technical solution, when the spatial dimension of the battery device as a whole along the second direction is large, by setting the second direction as the length direction of the soft-pack battery cell, and the battery device includes a plurality of first battery cell rows arranged along the second direction, the length of a single soft-pack battery cell can be reduced, the processing difficulty of a single soft-pack battery cell can be reduced, and the structural strength and structural stability of a single soft-pack battery cell can be improved.

[0018] In some embodiments, two first battery cell rows adjacent to each other along the second direction are connected via an inter-row conductive structure.

[0019] In the above technical solution, by arranging two first battery cell rows adjacent to each other along the second direction and connecting them through an inter-row conductive structure, the first battery cell rows adjacent to each other along the second direction can be connected in series or in parallel. On the one hand, the electrode output of multiple first battery cell rows can be simplified, and on the other hand, the power parameter design requirements of the battery device can be met.

[0020] In some embodiments, in two first battery cell rows adjacently arranged in the second direction, adjacent ends of two battery cell groups located at the ends in the first direction and opposite to each other in the second direction are connected through an inter-row conductive structure.

[0021] In the above technical solution, the inter-row conductive structure can be located at one end along the first direction between the two first battery cell rows to which it is connected, thereby shortening the length of the inter-row conductive structure, reducing costs, and saving the space occupied by the inter-row conductive structure in the battery device, thereby improving the energy density of the battery device.

[0022] In some embodiments, the battery device includes a second battery cell row, the second battery cell row includes a plurality of battery cell groups stacked along a first direction, and at least one battery cell group in the second battery cell row includes a plurality of soft-pack battery cells.

[0023] In the above technical solution, by setting the number of soft-pack cells included in at least one cell group in the second cell row to be multiple, the number of flexible bending conductive structures can be reduced, thereby reducing the number of times the conductive structure is bent, and further improving the grouping efficiency of the second cell row.

[0024] In some embodiments, the first direction is the thickness direction of the soft-pack battery cell, and all the soft-pack battery cells in a battery cell group including a plurality of soft-pack battery cells are arranged flat on a plane perpendicular to the first direction.

[0025] In the above technical solution, the connection between the multiple soft-pack battery cells in the battery cell group does not need to introduce a bending process, thereby improving the grouping efficiency.

[0026] In some embodiments, the second direction is the length direction of the soft-pack battery cell, the multiple soft-pack battery cells included in the battery cell group in the second battery cell row are arranged along the second direction, the adjacent ends of two adjacent soft-pack battery cells are connected by a conductive structure, and the conductive structure located at the end of the battery cell group along the second direction is a flexible structure and is bent to form a flexible bent conductive structure.

[0027] In the above technical solution, by setting the first direction as the thickness direction of the soft-pack battery cell and the second direction as the length direction of the soft-pack battery cell, the multiple soft-pack battery cells included in the battery cell group in the second battery cell row are arranged along the second direction, and the adjacent ends of two adjacent soft-pack battery cells are connected by a conductive structure. The conductive structure located at the end of the battery cell group along the second direction is a flexible structure and is bent to form a flexible bent conductive structure, thereby improving the grouping efficiency of the second battery cell row, shortening the length of the conductive structure and the flexible bent conductive structure, and saving costs.

[0028] In some embodiments, the total length of each battery cell group in the second battery cell row along the second direction is consistent.

[0029] Therefore, the space occupied by all the battery cell groups in the second battery cell row along the second direction is consistent with the space occupied by a single battery cell group along the second direction, which can reduce the space occupied in the second direction and is conducive to improving the energy density of the battery device.

[0030] In some embodiments, each battery cell group in the second battery cell row includes soft-pack battery cells with the same shape, arrangement and quantity.

[0031] In the above technical scheme, multiple battery cell groups have no difference in appearance, which is conducive to the mass production of battery cell groups. When arranging, there is no need to consider the difference between the appearances of different soft-pack battery cells to affect the arrangement, thereby improving production efficiency. Moreover, when selecting the bending of the conductive structure, the soft-pack battery cells of equal number are grouped to avoid the problem of wrong number. In addition, it is also conducive to achieving the overlap of the projections along the first direction after stacking. The second battery cell row formed after stacking multiple battery cell groups along the first direction has the same space occupation perpendicular to the first direction as the space occupation perpendicular to the first direction of a single battery cell group in the second battery cell row, thereby reducing the space occupation perpendicular to the first direction of the second battery cell row as a whole, improving the energy density of the battery device, and also conducive to achieving the same specifications of each flexible bending conductive structure in the second battery cell row, not some are longer and some are shorter, which is convenient for processing, conducive to mass production, and makes the overall conductive performance of the battery device easy to control.

[0032] In some embodiments, the second direction is the length direction of the soft-pack battery cell, electrode terminals extend from both ends of the soft-pack battery cell in the length direction, adjacent soft-pack battery cells are connected through adjacently arranged electrode terminals, and the battery cell group includes one soft-pack battery cell or includes multiple soft-pack battery cells arranged in sequence along the second direction.

[0033] In the above technical solution, the electrode terminals are arranged to extend from both ends of the soft-pack battery cell in the length direction, thereby reducing the difficulty of processing the soft-pack battery cell. Moreover, by setting the second direction as the length direction of the soft-pack battery cell, it is convenient to realize that each battery cell group located between the two ends of the first direction is electrically connected to the battery cell group upstream along the first direction at one end along the second direction through a flexible bending conductive structure, and the other end along the second direction is electrically connected to the battery cell group downstream along the first direction through a flexible bending conductive structure. For example, during processing, multiple soft-pack battery cells can be arranged in a row along the length direction of the soft-pack battery cell, and each adjacent two electrode terminals are connected to obtain a conductive structure, and then the conductive structure is bent, so that multiple soft-pack battery cells can be divided into multiple battery cell groups, and multiple battery cell groups can be stacked along the thickness direction of the soft-pack battery cell, thereby simplifying processing, improving grouping efficiency, and shortening the length of the flexible bending conductive structure. Moreover, the bent conductive structure only occupies the space on both sides of the length direction of the soft-pack battery cell, and does not occupy the space on both sides of the width direction of the soft-pack battery cell. When the width direction of the soft-pack battery cell is arranged according to the height direction, the height space occupied by the battery device can be reduced.

[0034] In some embodiments, the first direction is the thickness direction of the soft-pack battery cell, the width direction of the soft-pack battery cell is the third direction, and the projections of two battery cell groups stacked and adjacently arranged along the first direction overlap along the first direction.

[0035] In the above technical solution, since the first direction is the thickness direction of the soft-pack battery cell, it is beneficial to reduce the space occupied along the first direction after multiple battery cell groups are stacked along the first direction, and the space occupied by the entire battery cell row formed after such multiple battery cell groups are stacked along the first direction is the same as the space occupied by a single battery cell group in the battery cell row perpendicular to the first direction, thereby reducing the space occupied by the entire battery cell row perpendicular to the first direction and improving the energy density of the battery device.

[0036] In some embodiments, a soft-pack battery cell includes a soft-pack shell and an electrode terminal, the electrode terminal is connected to the electrode assembly in the soft-pack shell, and includes a lead-out portion extending out of the soft-pack shell, the lead-out portions adjacent to each other in adjacent soft-pack shells are directly or indirectly connected to form a conductive structure, and the conductive structure located at the end of the battery cell group along the second direction is a flexible structure and is bent to form a flexible bent conductive structure.

[0037] In the above technical solution, the adjacent electrode terminals of two adjacent soft-pack battery cells are connected to form a conductive structure, and the conductive structure located at the end of the battery cell group along the second direction is set as a flexible structure and bent to form a flexible bent conductive structure, thereby facilitating the processing of the conductive structure and the flexible bent conductive structure, and shortening the length of the electrode terminals, the conductive structure and the flexible bent conductive structure, thereby saving production costs.

[0038] In some embodiments, lead portions from two soft-pack battery cells in the flexible bending conductive structure are overlapped and connected.

[0039] In the above technical solution, two adjacent battery cell groups can be connected by directly overlapping the lead-out parts of the soft-pack battery cells, so that the two battery cell groups have a larger connection area, so that the connection and fixation of the two battery cell groups are more stable and reliable. Moreover, compared with the indirect connection, the direct connection can simplify the structure, reduce the parts, improve the assembly efficiency, further improve the grouping efficiency, and increase the production capacity.

[0040] In some embodiments, the two lead portions constituting the overlapping connection are connected at the overlapping portion by welding or conductive adhesive.

[0041] In the above technical solution, it is not only easy to operate, but also can achieve a relatively stable and reliable electrical connection.

[0042] In some embodiments, the overlapping connection positions of the two lead-out portions in the flexible bending conductive structure are staggered from the bending position of the flexible bending conductive structure.

[0043] In the above technical solution, on the one hand, the flexible bendable conductive structure can be bent relatively easily, and the bending has no adverse effect on the reliability and stability of the overlapping connection between the lead-out parts, thereby improving the connection reliability and electrical connection stability between the battery cell groups.

[0044] In some embodiments, the bending position of the flexible bending conductive structure is centered, and the overlapping connection position of the two lead-out portions in the flexible bending conductive structure is located on one side of the bending position in the first direction and opposite to the corresponding battery cell group along the second direction.

[0045] In the above technical solution, by setting the extension direction of the flexible bending conductive structure, the distance from the bending position of the flexible bending conductive structure to each battery cell group is equal, which is beneficial to improving the structural stability of the flexible bending conductive structure and reducing the stress concentration of the flexible bending conductive structure.

[0046] In some embodiments, the two lead-out portions constituting the overlapping connection in the flexible bending conductive structure are respectively the first lead-out portion and the second lead-out portion, the battery cell group extending out of the first lead-out portion is the first battery cell group, the battery cell group extending out of the second lead-out portion is the second battery cell group, and the first battery cell group and the second battery cell group are stacked adjacent to each other; the length of the first lead-out portion is greater than the length of the second lead-out portion, the first lead-out portion includes an extension section, a bending section and an overlapping section, the extension section is opposite to the first battery cell group along the second direction, the overlapping section is spaced from the extension section along the first direction, the overlapping section is opposite to the second battery cell group along the second direction, the bending section is bent and its two ends are respectively connected to the extension section and the overlapping section, the second lead-out portion is opposite to the second battery cell group along the second direction, and is overlappingly connected to the overlapping section.

[0047] In the above technical solution, it can be relatively easy to achieve that the overlapping connection positions of the two lead-out portions in the flexible bending conductive structure are staggered with the bending position of the flexible bending conductive structure, and the bending is relatively easy.

[0048] In some embodiments, the second direction is the length direction of the soft-pack battery cell, and both ends of each soft-pack battery cell in the length direction respectively have a first lead-out portion and a second lead-out portion.

[0049] In the above technical solution, by setting the two lead-out parts of each soft-pack battery cell along the length direction to be one long and one short respectively, the connection points of every two adjacent soft-pack battery cells can be connected by a long and one short lead-out part, so that it is easier to achieve the staggered overlapping connection positions of the two lead-out parts in the flexible bending conductive structure and the bending position of the flexible bending conductive structure.

[0050] In some embodiments, the two lead-out portions constituting the overlapping connection in the flexible bending conductive structure have the same length, and the bending position of the flexible bending conductive structure is located at a stacked non-connected portion of the two lead-out portions.

[0051] In the above technical solution, when producing soft-pack batteries, the two lead-out parts at both ends of the soft-pack batteries can be cut to equal lengths. When arranging multiple soft-pack batteries, there is no need to select the placement direction due to the different lengths of the lead-out parts, thereby improving production efficiency.

[0052] In some embodiments, the lead-out portions from two soft-pack battery cells in the flexible bending conductive structure are indirectly connected via a transition piece.

[0053] In the above technical solution, by providing an adapter to connect the lead-out parts of two soft-pack cells, the length of the lead-out parts can be shortened, and the processing difficulty of the soft-pack cells can be reduced. In addition, standardized adapters can be used for fast and efficient connection processing, so that multiple soft-pack cells can be connected conveniently and efficiently, and the conductive performance of each flexible bending conductive structure is consistent.

[0054] In some embodiments, the adapter is overlapped and connected to the lead-out portion.

[0055] In the above technical solution, by arranging the adapter plate and the lead-out portion to overlap and connect, the adapter plate and the lead-out portion can have a larger connection area, so that the connection and fixation of the two battery cell groups are more stable and reliable.

[0056] In some embodiments, the overlapping connection position between the adapter and the lead-out portion is staggered with the bending position of the flexible bending conductive structure.

[0057] In the above technical solution, the flexible bendable conductive structure does not bend at the overlapping connection position between the adapter and the lead-out part. This allows the flexible bendable conductive structure to be bent more easily, and the bending does not adversely affect the reliability and stability of the overlapping connection between the adapter and the lead-out part, thereby improving the connection reliability and electrical connection stability between the battery cell groups.

[0058] In some embodiments, the flexible bending conductive structure is bent at the adapter sheet, and the bending position of the flexible bending conductive structure is centered.

[0059] In the above technical solution, the structural stability of the flexible bending conductive structure is improved, and the stress concentration of the flexible bending conductive structure is reduced. In addition, the length of the adapter can be relatively long, a part of which is used to overlap with the lead-out portion, and the rest is used for bending, thereby simplifying the design of the lead-out portion and further shortening the length of the lead-out portion.

[0060] In some embodiments, the bending position of the flexible bending conductive structure is staggered from the connecting conductive position of two battery cell groups in the flexible bending conductive structure.

[0061] In the above technical solution, by setting the bending position of the flexible bending conductive structure to be staggered with the connection conductive position of the two battery cell groups in the flexible bending conductive structure, on the one hand, the flexible bending conductive structure can be bent more easily, and the bending has no adverse effect on the connection reliability and stability of the two battery cell groups in the flexible bending conductive structure, thereby improving the connection reliability and electrical connection stability between the battery cell groups.

[0062] In some embodiments, the bending corner of the flexible bending conductive structure is a rounded corner.

[0063] In the above technical solution, by setting the bending corner of the flexible bending conductive structure to a rounded corner, the stress concentration problem at the bending position can be reduced, and the connection reliability and conductive stability of two adjacent battery cell groups can be improved.

[0064] In some embodiments, the flexible bending conductive structure is in the shape of or in the shape of.

[0065] In the above technical solution, the flexible bent conductive structure in the shape of a can save space, and the flexible bent conductive structure in the shape of a can be easy to process, thereby reducing the difficulty of processing.

[0066] In some embodiments, the two side edges of the battery cell group in the third direction are respectively a first edge and a second edge, and the flexible bending conductive structure is arranged close to the first edge relative to the second edge in the third direction to form a first reserved space on the side of the flexible bending conductive structure close to the second edge, and the first direction, the second direction and the third direction are perpendicular to each other.

[0067] In the above technical solution, the first reserved space can be used to accommodate other components, and the space of the battery device where the flexible bending conductive structure is arranged in the third direction can be fully utilized to reduce the occupation of other spaces, thereby facilitating improving the energy density of the battery device.

[0068] In some embodiments, the flexible bending conductive structure is located on a side of the center line of the battery cell group in the third direction close to the first edge.

[0069] In the above technical solution, the size of the first reserved space along the third direction can exceed more than half of the size of the battery cell group along the third direction, so that the first reserved space can accommodate more components and make more effective use of the space in the third direction where the flexible bending conductive structure of the battery device is set, so as to reduce the occupation of other spaces, thereby facilitating improving the energy density of the battery device.

[0070] In some embodiments, the battery device includes a box for loading soft-pack battery cells, a reinforcing partition is sandwiched between at least two adjacent battery cell groups along a first direction, the stiffness of the reinforcing partition is greater than the stiffness of the soft-pack outer shell of the soft-pack battery cells, and the reinforcing partition has a connecting portion protruding from the battery cell group along a second direction, the connecting portion extends into the first reserved space and is connected to the box.

[0071] In the above technical solution, the stiffness of the reinforcing partition can be utilized to be greater than the stiffness of the soft-pack shell, so that the reinforcing partition can improve the deformation problem of the soft-pack battery cell, and by reinforcing the connection between the partition and the box body, the reinforcing partition can more reliably and stably support the battery cell group, thereby improving the stability of the battery device. In addition, since the reinforcing partition is connected to the box body through the connecting portion extending to the first reserved space, the occupation of other spaces can be reduced, and the space saved along the third direction by the flexible bending conductive structure can be effectively utilized, which is conducive to improving the energy density of the battery device.

[0072] In some embodiments, the box includes a box body and a mounting bracket, the mounting bracket is installed in the box body, the mounting bracket is arranged on one side of the battery cell group in the second direction, and the connecting portion is connected to the mounting bracket.

[0073] In the above technical solution, by arranging a mounting bracket in the box body and connecting the reinforcing partition with the box body through the mounting bracket, the difficulty of connecting the reinforcing partition with the box body can be reduced, and flexible installation of the reinforcing partition with the box body can be achieved. In addition, by arranging the mounting bracket on one side of the battery cell group in the second direction, the connection portion of the reinforcing partition protruding from the battery cell group in the second direction can easily approach the mounting bracket and form a connection with the mounting bracket.

[0074] In some embodiments, an edge of the connecting portion in the third direction close to the second edge is a first edge, an edge of the mounting bracket in the third direction close to the second edge is a second edge, and both the first edge and the second edge are located on a side of the second edge close to the first edge, so that a second reserved space is formed on the side of the connecting portion and the mounting bracket in the third direction away from the first edge.

[0075] In the above technical solution, by forming a second reserved space on the side of the connecting part and the mounting bracket away from the first edge in the third direction, the second reserved space can be used to arrange other components of the battery device, such as circuits, etc., thereby reducing space occupied at other locations, which is beneficial to improving the compactness and energy density of the battery device.

[0076] In some embodiments, one of the length direction and the width direction of the box is the first direction, the other is the second direction, the height direction of the box is the third direction, and multiple mounting brackets arranged along the first direction are respectively provided at both ends of the box body in the second direction.

[0077] In the above technical solution, by providing multiple mounting brackets, it is convenient to flexibly connect with multiple reinforcing partitions arranged along the first direction, thereby reducing the difficulty of connecting the reinforcing partitions with the mounting brackets. In addition, the mounting brackets are provided at both ends of the box body in the second direction, thereby reducing the difficulty of connecting the mounting brackets with the box body.

[0078] In some embodiments, the thickness direction of the soft-pack battery cell is a first direction, the battery cell group includes one soft-pack battery cell or includes a plurality of soft-pack battery cells arranged flat on a plane perpendicular to the first direction, a reinforcing partition is sandwiched between at least two adjacent battery cell groups along the first direction, the thickness direction of the reinforcing partition is the first direction, the stiffness of the reinforcing partition is greater than the stiffness of the soft-pack shell of the soft-pack battery cell, the thickness of the reinforcing partition is less than the thickness of the battery cell group, and the reinforcing partition is configured to be able to exchange heat with the electrode assembly in the soft-pack battery cell through the soft-pack shell in contact with it.

[0079] In the above technical solution, the heat transfer property of the reinforced partition can be utilized, so that the reinforced partition can also play the role of heat dissipation and temperature equalization for the soft-pack battery cell, thereby optimizing the performance and service life of the soft-pack battery cell; and, by reinforcing the partition between adjacent soft-pack battery cells, the heat transfer between adjacent soft-pack battery cells on both sides of the reinforced partition can be reduced, thereby improving the overall reliability of the battery device. In addition, since the thickness of the reinforced partition is less than the thickness of the battery cell group, the setting of the reinforced partition will not take up too much space, thereby helping to improve the energy density of the battery device.

[0080] In some embodiments, the reinforcing separator covers more than 80% of the total area of ​​all the soft-pack cells in the cell group.

[0081] In the above technical solution, by setting a reinforced partition to cover more than % of the total area of ​​all soft-pack batteries in the battery group, a larger heat transfer surface and support surface can be provided between the battery group and the reinforced partition, so that the reinforced partition can provide better support, heat transfer and separation effects for the battery group.

[0082] In some embodiments, multiple reinforcing partitions are sandwiched between multiple battery cell groups stacked along the first direction, and only one reinforcing partition is sandwiched between every two adjacent battery cell groups. The two adjacent reinforcing partitions arranged along the first direction are connected by a connecting plate located on one side of the battery cell group in the third direction, and the first direction, the second direction and the third direction are perpendicular to each other.

[0083] In the above technical solution, two reinforcing partitions adjacent to each other along the first direction are connected through a connecting plate located on one side of the battery cell group in the third direction, so that the reliability of the reinforcing partition in supporting the soft-pack battery cell can be improved, and the setting position of the connecting plate does not interfere with the battery cell group and does not interfere with the flexible bending conductive structure located in the second direction.

[0084] In some embodiments, a buffer is sandwiched between at least two battery cell groups adjacent to each other along the first direction, and the rigidity of the buffer is less than the rigidity of the soft-pack shell.

[0085] In the above technical solution, by arranging a buffer between two adjacent battery cell groups, and the stiffness of the buffer is less than the stiffness of the soft-pack shell, the buffer can provide expansion space for the battery cell group, so that the buffer can well absorb the expansion deformation of the battery cell group and the vibration under external impact, etc., so as to improve the overall structural stability of the battery device.

[0086] In some embodiments, a buffer is sandwiched between at least two battery cell groups adjacent to each other along a first direction, the stiffness of the buffer is less than the stiffness of the soft-pack shell, and multiple reinforcing partitions and multiple buffers are sandwiched between multiple battery cell groups stacked along the first direction, and each battery cell group is sandwiched between the buffer and the reinforcing partition.

[0087] In the above technical solution, by arranging each battery cell group to be sandwiched between the buffer and the reinforcing partition, the arrangement of the reinforcing partition and the buffer is made more balanced, and each battery cell group can obtain stable and reliable support, heat exchange and buffering effects.

[0088] In some embodiments, 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 disposed in the receiving cavity.

[0089] In the above technical solution, the structure of the soft-pack shell is simple and easy to process, which is conducive to increasing the volume of the soft-pack shell, thereby increasing the energy density of the soft-pack battery cell.

[0090] In some embodiments, 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.

[0091] In the above technical solution, the volume of the soft-pack shell in the soft-pack battery cell accounts for a smaller proportion and is lighter in weight, so that the volume and weight of the electrode assembly in the soft-pack battery cell account for a larger proportion, thereby greatly improving the energy density of the soft-pack battery cell. The soft-pack battery cell can have a larger thickness and a higher energy density. Under the same volume, compared with a plurality of thinner soft-pack batteries, the number of arranged soft-pack batteries in this embodiment is smaller, thereby reducing the proportion of the soft-pack shell, and further allowing a plurality of soft-pack batteries in the same volume to have a greater energy density. Moreover, the number of structural components such as reinforcing partitions and buffers in the battery device can be reduced, and the arrangement space of the soft-pack batteries in the battery device can be increased, thereby greatly improving the overall energy density of the battery device.

[0092] In some embodiments, the two membrane parts are separate parts and have edge sealing structures around the soft-pack battery cell.

[0093] In the above technical solution, the single membrane portion is easy to process, which can reduce the processing difficulty.

[0094] In some embodiments, the two membrane portions are an integrated piece and one long side and two wide sides around the soft-pack battery cell respectively have edge sealing structures.

[0095] In the above technical solution, the number of edge sealing times can be reduced, and the size of the entire soft-pack battery cell in the width direction can be reduced, thereby improving the energy density. Moreover, compared with the edge sealing on all sides, one side of the edge sealing can be omitted to avoid leakage problems caused by loose edge sealing, thereby improving the reliability of the soft-pack battery cell.

[0096] In some embodiments, the battery device includes a battery cell row, the battery cell row includes multiple battery cell groups stacked along a first direction, the battery device includes a box for loading the battery cell row, one of the length direction and the width direction of the box is the first direction, and the other is the second direction, the thickness direction of the soft-pack battery cell is the first direction, the second direction is the length direction of the soft-pack battery cell, the width direction of the soft-pack battery cell is consistent with the height direction of the box, and the box includes cover plates arranged on both sides of the battery cell row along the height direction of the box.

[0097] In the above technical solution, placing the soft-pack battery cells as above can improve the uniformity of the force applied to the soft-pack battery cells, which is beneficial to the heat dissipation of the soft-pack battery cells.

[0098] In some embodiments, at least one cover plate is in heat exchange with the battery cell.

[0099] In the above technical solution, by placing the soft-pack battery cells as above, each soft-pack battery cell can effectively exchange heat with the cover plate, thereby improving the consistency and uniformity of temperature regulation of each soft-pack battery cell, thereby improving the working stability and reliability of the battery cell row, and further improving the performance of the battery device.

[0100] In some embodiments, structural adhesive is filled between the battery cell row and the cover plate.

[0101] In the above technical solution, the stiffness of the soft-pack battery cell along the height direction of the box body can be improved.

[0102] In some embodiments, the structural adhesive is a thermally conductive adhesive.

[0103] In the above technical solution, it is beneficial to dissipate heat of the soft-pack battery cell.

[0104] In some embodiments, a rubber strip is provided in the box body, the cover plate includes a bottom plate located below the battery cell row, a fitting gap is formed between the bottoms of two soft-pack battery cells adjacently arranged along the first direction, and the rubber strip is located between the fitting gap and the bottom plate.

[0105] In the above technical solution, the rubber blocking strips are arranged to prevent the structural glue from overflowing between adjacent soft-pack battery cells, thereby reducing the probability of adjacent soft-pack battery cells forming a hard structure due to the overflow of glue, 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.

[0106] In some embodiments, two adjacent soft-pack battery cells share a rubber strip.

[0107] In the above technical solution, two adjacent soft-pack battery cells share one rubber barrier strip, thereby reducing the number of rubber barrier strips, which is beneficial to improving assembly efficiency.

[0108] In some embodiments, the rubber barrier strip is a rubber barrier foam, and the rubber barrier strip is bonded to the bottom plate; or, the rubber barrier strip is a rubber strip with adhesive on one side, and the rubber barrier strip is bonded to the bottom of the soft-pack battery cell.

[0109] In the above technical solution, the adhesive blocking foam has good compressibility. By squeezing the adhesive blocking strip through the soft-pack battery cell, the structural adhesive can be better prevented from overflowing between adjacent soft-pack battery cells, and the adhesive blocking strip is bonded to the bottom plate to facilitate the installation and fixation of the adhesive blocking strip; or, by setting the adhesive blocking strip as a strip with adhesive on one side, it is convenient to bond the adhesive blocking strip to the bottom of the soft-pack battery cell, so that the adhesive blocking strip and the soft-pack battery cell are fixed as a whole, thereby facilitating the improvement of the overall assembly efficiency of the battery device.

[0110] In some embodiments, the battery device further includes: a heat exchange plate, which is disposed between the battery cell row and at least one cover plate.

[0111] In the above technical solution, the temperature regulation effect on the battery cell row can be optimized through the design of the heat exchange plate.

[0112] In some embodiments, 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.

[0113] In the above technical solution, the use of the above types of soft-pack cells can provide more options for the design of battery devices to meet different usage requirements. Among them, the soft-pack cells are lithium iron phosphate battery cells, which have the advantages of high reliability, long cycle life, light weight, large capacity, and low internal resistance; the soft-pack cells are ternary battery cells, which have the advantages of high energy density and good electrochemical performance; the soft-pack cells are solid-state battery cells, which have the advantages of high energy density and high reliability, light weight, and good high and low temperature performance.

[0114] In some embodiments, the soft-pack battery cell is a lithium iron phosphate battery cell, and in the positive electrode material of the soft-pack battery cell, the usage ratio of the positive electrode active material, the binder, and the conductive agent is: 96:1~3:1~3; the soft-pack battery cell is a ternary battery cell, and in the positive electrode material of the soft-pack battery cell, the usage ratio of the positive electrode active material, the binder, and the conductive agent is: 96:2~3:1~2.

[0115] In the above technical solution, when the soft-pack battery cell is a lithium iron phosphate battery cell, a high proportion of positive electrode active materials means that more substances capable of electrochemical reactions can be accommodated in a limited electrode assembly, which is beneficial to increasing the capacity and energy density of the battery device, so that the lithium iron phosphate battery cell can output higher power with relatively small volume and weight, meeting the application scenarios with certain requirements for energy density. The use of the above range of binder and conductive agent can reduce the cost of auxiliary materials, thereby reducing the overall cost of the battery device. When the soft-pack battery cell is a ternary battery cell, since the structure and surface properties of the ternary material itself are relatively complex, the use of the above-mentioned proportion of positive electrode active materials, binders, and conductive agents is beneficial to ensure good bonding 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, and is beneficial to reducing the risk of active material shedding and electrode pulverization during charging and discharging, and extending the cycle life of the battery device.

[0116] In a second aspect, an embodiment of the present application further provides an electrical device, comprising a battery device according to any of the above solutions.

[0117] In the above technical solution, since the production efficiency of the battery device is improved, it is helpful to reduce the manufacturing cost of the power-consuming device. BRIEF DESCRIPTION OF THE DRAWINGS

[0118] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0119] Figure 1 A schematic diagram of the structure of a vehicle provided in some embodiments of the present application;

[0120] Figure 2 A schematic diagram of the structure of a battery device provided in some embodiments of the present application;

[0121] Figure 3 A schematic diagram of a battery device provided in some embodiments of the present application hidden behind a box cover;

[0122] Figure 4 A schematic diagram of stacking a battery cell group provided in an embodiment of the present application;

[0123] Figure 5 A schematic diagram of stacking another battery cell group provided in an embodiment of the present application;

[0124] Figure 6 for Figure 5 The enlarged view of the circled section A;

[0125] Figure 7 A schematic diagram of a battery cell row provided in an embodiment of the present application;

[0126] Figure 8 for Figure 7 A schematic diagram of a processing state of a battery cell row shown in ;

[0127] Fig. 9 for Figure 7 Another schematic diagram of the processing state of the battery row shown in ;

[0128] Fig.10 A schematic diagram of a soft-pack battery cell provided in an embodiment of the present application;

[0129] Fig.11 A schematic diagram of a battery device provided in an embodiment of the present application;

[0130] Fig.12 A schematic diagram of another battery cell row provided in an embodiment of the present application;

[0131] Fig.13 for Fig.12 A schematic diagram of a processing state of a battery cell row shown in ;

[0132] Fig.14 A schematic diagram of another battery device provided in an embodiment of the present application;

[0133] Fig.15 A schematic diagram of another battery device provided in an embodiment of the present application;

[0134] Fig.16 A partial schematic diagram of a battery cell row provided in some embodiments of the present application;

[0135] Fig.17 A partial schematic diagram of a battery cell row provided in some other embodiments of the present application;

[0136] Fig.18 A partial schematic diagram of a battery cell row provided in some other embodiments of the present application;

[0137] Fig.19 A schematic diagram of a battery cell row and a mounting bracket provided in some embodiments of the present application;

[0138] Fig. 20 for Fig.19 an enlarged view of the C portion shown in the middle frame;

[0139] Fig.21 for Figure 3 An enlarged view of the circled section B;

[0140] Fig. 22 A schematic diagram of the coordination between a battery cell group and a reinforced separator provided in some embodiments of the present application;

[0141] Fig.23 A partial enlarged view of a soft-pack battery cell provided in some embodiments of the present application;

[0142] Fig.24 A partial enlarged view of a soft-pack battery cell provided in some embodiments of the present application;

[0143] Fig.25 A schematic diagram of a battery device provided in some embodiments of the present application;

[0144] Fig.26 For along Fig.25 A cross-sectional view of line EE shown in FIG.

[0145] Fig. 27 for Fig.26 an enlarged view of the D portion shown in the middle frame;

[0146] Fig.28 A partial schematic diagram of a battery device provided in some embodiments of the present application;

[0147] Fig.29 A flowchart of a processing step of a battery device provided for some embodiments of the present application;

[0148] Fig.30 A flowchart of a processing step of a battery device provided for some embodiments of the present application;

[0149] Fig.31 A flowchart of processing steps of a battery device provided for some embodiments of the present application.

[0150] Reference numerals:

[0151] Vehicles 1000;

[0152] Battery device 100; battery cell module 101;

[0153] Battery cell row 10; first battery cell row 10A; second battery cell row 10B;

[0154] First direction F1; second direction F2; third direction F3; first reserved space S1; second reserved space S2;

[0155] Battery cell group 1X; first edge 1X1; second edge 1X2;

[0156] Upstream battery cell group 1A; middle battery cell group 1B; first end 1B1; second end 1B2; downstream battery cell group 1C;

[0157] First battery cell group 1Xa; first lead portion 1211; extension section 12111; bending section 12112; overlapping section 12113;

[0158] The second battery cell group 1Xb; the second lead-out portion 1212;

[0159] Soft pack battery 1;

[0160] Soft package shell 11; membrane portion 111; edge sealing structure 112;

[0161] Electrode terminal 12; lead portion 121; adapter plate 122;

[0162] Reinforced partition 2; connecting portion 23; first edge 231; buffer member 3;

[0163] Conductive structure 4; inter-row conductive structure 41;

[0164] Flexible bending conductive structure 5; first conductive structure 51; second conductive structure 52;

[0165] Connecting plate 6;

[0166] Box 20;

[0167] Box body 7; cover plate 71; bottom plate 711; top plate 712;

[0168] Mounting bracket 8; second edge 83; rubber strip 9;

[0169] Heat exchange plate 30; controller 200; motor 300. DETAILED DESCRIPTION

[0170] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0171] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0172] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0173] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, they can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0174] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0175] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0176] The term "plurality" used in the present application refers to more than two, including two.

[0177] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0178] Among the power batteries currently used, some power batteries use soft-pack cells. The soft-pack cell includes a soft-pack shell and an electrode assembly arranged in the soft-pack shell. The soft-pack cell has an electrode terminal connected to the electrode assembly and at least partially located outside the soft-pack shell. Different soft-pack cells are connected in series and parallel through the conductive connection between the electrode terminals. Usually, the electrode terminals that need to be conductively connected are welded on the same conductive bracket, and the conductive connection between multiple electrode terminals is achieved through the conductive bracket. However, the welding operation space between the electrode terminal and the conductive bracket is small, the operation is more difficult, and it is difficult to detect the welding quality after welding. The position with low welding quality is also difficult to repair, resulting in low production capacity of the power battery and low reliability of the power battery. Moreover, due to the introduction of the conductive bracket, not only are the components increased, resulting in an increase in the weight and cost of the power battery, but the conductive bracket also occupies space in the power battery, affecting the energy density of the power battery.

[0179] In view of this, the present application proposes a battery device using soft-pack battery cells. During production, multiple soft-pack battery cells can be first arranged in a row, and then the electrode terminals of each two adjacent soft-pack battery cells are connected together to obtain a flexible conductive structure, and each number of adjacent soft-pack battery cells are divided into a battery cell group, and the flexible conductive structures at both ends of the battery cell group are bent in opposite directions to form flexible bent conductive structures, so that multiple battery cell groups can be stacked along the thickness direction of the soft-pack battery cells.

[0180] Therefore, the grouping efficiency of the soft-pack cells in the battery device of the embodiment of the present application is high, so as to greatly improve the production efficiency of the battery device. Moreover, since the conductive bracket is omitted, the electrode terminals of adjacent soft-pack cells have a larger operating space when welding, thereby reducing the difficulty of welding operation, and the welding quality is also easy to detect, and the welding position is also easy to repair, so that the reliability of the battery device can be improved. Moreover, since the conductive bracket is omitted, the number of parts is reduced, so that the weight and cost of the battery device can be reduced, and the space occupied by the conductive bracket is also omitted, which is conducive to improving the energy density of the battery device.

[0181] The technical solution described in the embodiments of the present application is applicable to a battery device including a soft-pack battery cell, and an electrical device using the battery device.

[0182] The electrical device may be a vehicle, a mobile phone, a portable device, a laptop computer, a ship, a spacecraft, an electric toy, an electric tool, and the like. The vehicle may be a fuel vehicle, a gas vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, and the like; the spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, and the like; the electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, and the like; the electric tool may include a metal cutting electric tool, a grinding electric tool, an assembly electric tool, and an electric tool for railways, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact drill, a concrete vibrator, and an electric planer, and the like. The embodiments of the present application do not impose any special restrictions on the above-mentioned electrical devices.

[0183] For the convenience of description, the following embodiments are described by taking the electric device as a vehicle as an example.

[0184] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of the present application. The vehicle 1000 is provided with a battery device 100, and the battery device 100 can be provided at a position such as the bottom, head, or tail of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000, for example, the battery device 100 can be used as an operating power source for the vehicle 1000.

[0185] The vehicle 1000 may also include a controller 200 and a motor 300, wherein the controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power requirements for starting, navigating, and driving the vehicle 1000. In some embodiments of the present application, the battery device 100 may not only be used as an operating power source for the vehicle 1000, but may also be used as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0186] Please refer to Figure 2 and Figure 3 , Figure 2 This is a schematic diagram of the structure of a battery device 100 provided in some embodiments of the present application. Figure 3 This is a schematic diagram of the battery device 100 provided in some embodiments of the present application after the box cover is hidden. Figure 2 and Figure 3 As shown, 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, in parallel, or in mixed connection. Mixed connection means that the multiple soft-pack battery cells 1 are connected in both series and in parallel.

[0187] In a first aspect, the present application embodiment provides a battery device 100, please continue to refer to Figure 2 and Figure 3 , and combined with Figure 4 and Figure 5 , Figure 4 A schematic diagram of stacking a battery cell group 1X provided in an embodiment of the present application is shown in FIG. Figure 5 A schematic diagram of another stacking of a battery pack 1X provided in an embodiment of the present application. The battery device 100 includes a plurality of battery packs 1X stacked along a first direction F1, the first direction F1 being the thickness direction of each soft-pack battery cell 1, and each battery pack 1X includes at least one soft-pack battery cell 1, that is, each battery pack 1X includes one or more soft-pack battery cells 1. For example Figure 4 In the embodiment shown, each battery cell group 1X includes two soft-pack battery cells 1. Figure 5 In the illustrated embodiment, each battery cell group 1X includes a soft-pack battery cell 1 .

[0188] Combination Figure 6-Figure 9 , Figure 6 for Figure 5 The enlarged view of the circled section A. Figure 7 A schematic diagram of a battery cell row 10 provided in an embodiment of the present application; Figure 8 for Figure 7 A schematic diagram of a processing state of the battery cell row 10 shown in FIG. Fig. 9 for Figure 7 Another schematic diagram of the processing state of the battery cell row 10 is shown in FIG. Each battery cell group 1X located between the two ends of the first direction F1 is electrically connected to the battery cell group 1X upstream along the first direction F1 at one end along the second direction F2, and is electrically connected to the battery cell group 1X downstream along the first direction F1 at the other end along the second direction F2, and the connection position of the two interconnected battery cell groups 1X forms a flexible bent conductive structure 5.

[0189] The first direction F1 and the second direction F2 are arranged at an angle, for example, the first direction F1 and the second direction F2 intersect at a right angle, or at an acute angle, or at an obtuse angle. Exemplarily, the first direction F1 is the thickness direction of each soft-pack battery cell 1, and the second direction F2 is the length direction of each soft-pack battery cell 1. In this case, the first direction F1 and the second direction F2 intersect at a right angle, but the present application is not limited thereto. For example, in other embodiments of the present application, the second direction F2 may also be the width direction of at least one soft-pack battery cell 1, etc.

[0190] In addition, it should be noted that "upstream" and "downstream" refer to the two sides of the battery cell group 1X along the first direction F1, that is, one side of the battery cell group 1X along the first direction F1 is the upstream, and the other side of the battery cell group 1X along the first direction F1 is the downstream, but there is no limitation on which side of the battery cell group 1X "upstream" and "downstream" specifically refer to, it only indicates the two sides of the battery cell group 1X along the first direction F1.

[0191] In the above technical solution, among the multiple battery cell groups 1X stacked along the first direction F1, any battery cell group 1X except the two battery cell groups 1X located at the two ends in the first direction F1 can be used as the intermediate battery cell group 1B, or in other words, among the multiple battery cell groups 1X stacked along the first direction F1, any battery cell group 1X sandwiched between two battery cell groups 1X can be used as the intermediate battery cell group 1B, wherein the two ends of the intermediate battery cell group 1B along the second direction F2 are respectively the first end 1B1 and the second end 1B2, and the two battery cell groups 1X adjacent to the intermediate battery cell group 1B are respectively the upstream battery cell group 1A and the downstream battery cell group 1C, the upstream battery cell group 1A is located upstream of the intermediate battery cell group 1B, and the downstream battery cell group 1C is located downstream of the intermediate battery cell group 1B. The end of the upstream battery cell group 1A close to the first end 1B1 along the second direction F2 is electrically connected to the first end 1B1 through the flexible bending conductive structure 5, and the end of the downstream battery cell group 1C close to the second end 1B2 along the second direction F2 is electrically connected to the second end 1B2 through the flexible bending conductive structure 5.

[0192] Combination Figure 7-Figure 9 For example, during processing, the upstream battery cell group 1A, the middle battery cell group 1B and the downstream battery cell group 1C can be arranged in a row along the second direction F2, so that the upstream battery cell group 1A, the middle battery cell group 1B and the downstream battery cell group 1C are placed in sequence along the second direction F2 to present a flat state (for example Figure 8 As shown in FIG. 1 ), the adjacent positions of the upstream battery cell group 1A and the middle battery cell group 1B are connected to obtain a first conductive structure 51, the adjacent positions of the middle battery cell group 1B and the downstream battery cell group 1C are connected to obtain a second conductive structure 52, and the first conductive structure 51 and the second conductive structure 52 are bent in opposite directions (for example Fig. 9 As shown), for example, the first direction F1 is the front-to-back direction, the first conductive structure 51 is bent forward to form a flexible bent conductive structure 5, and the second conductive structure 52 is bent backward to form another flexible bent conductive structure 5, so that the upstream battery cell group 1A can be stacked in front of the middle battery cell group 1B, and the downstream battery cell group 1C can be stacked behind the middle battery cell group 1B, and the upstream battery cell group 1A, the middle battery cell group 1B and the downstream battery cell group 1C are stacked in sequence along the first direction F1 (for example Figure 7 as shown).

[0193] Thus, by connecting each two adjacent battery cell groups 1X together and bending the connection position to achieve stacking of the two adjacent battery cell groups 1X along the first direction F1, and then by electrically connecting one end of the battery cell group 1X along the second direction F2 to the battery cell group 1X upstream along the first direction F1, and electrically connecting the other end of the battery cell group 1X along the second direction F2 to the battery cell group 1X downstream along the first direction F1, the grouping efficiency can be effectively improved, and the production efficiency of the battery device 100 can be improved. Moreover, since the connection of adjacent battery cell groups 1X does not need to pass through the conductive bracket, the operation space of the adjacent battery cell groups 1X during connection is large, thereby reducing the difficulty of the connection operation, and the connection quality is also easy to detect, and the connection position is also easy to repair, so that the reliability of the battery device 100 can be improved. Moreover, since the conductive bracket is omitted and the parts are reduced, the weight and cost of the battery device 100 are reduced, and the space occupied by the conductive bracket is also omitted, which is conducive to improving the energy density of the battery device 100.

[0194] For example, in combination Figure 6 , the soft-pack battery 1 includes a soft-pack shell 11, an electrode assembly and an electrode terminal 12, and the electrode terminal 12 is electrically connected to the electrode assembly in the soft-pack shell 11. The shell of the soft-pack battery 1 is the soft-pack shell 11, and the material of the soft-pack shell 11 is not limited, for example, it can be an aluminum-plastic film. The electrode assembly may include positive and negative electrodes. At least part of the electrode terminal 12 is exposed outside the soft-pack shell 11. In other words, the electrode terminal 12 can be completely exposed outside the soft-pack shell 11, or only a part of the electrode terminal 12 can be exposed outside the soft-pack shell 11. In the present application, the part of the electrode terminal 12 exposed outside the soft-pack shell 11 is used as the lead-out portion 121, and the lead-out portion 121 is used for connecting soft-pack batteries 1 to soft-pack batteries 1. In other words, different soft-pack batteries 1 are electrically connected through direct or indirect connection between the lead-out portions 121, thereby realizing series and / or parallel connection between multiple soft-pack batteries 1.

[0195] Among them, the electrode terminals 12 of the two soft-packed cells 1 are connected together to form a conductive structure 4, that is, the lead-out portions 121 of the two soft-packed cells 1 are directly or indirectly connected together to form a conductive structure 4, and the conductive structure 4 located at the end of the cell group 1X along the second direction F2 is set to be flexible and deformable, and is bent and deformed to form a flexible bending conductive structure 5, so that the two cell groups 1X connected by the flexible bending conductive structure 5 can move relative to each other to a stacked state along the first direction F1. It is worth noting that the "direct or indirect connection" described in this application does not include an integrated connection such as one-piece molding, but two separate parts are connected together through a process, such as welding, bonding, etc.

[0196] In the embodiment of the present application, the number of soft-packed cells 1 included in the cell group 1X is not limited. The cell group 1X includes one soft-packed cell 1 or includes multiple soft-packed cells 1. For example, each cell group 1X includes one soft-packed cell 1, and for another example, each cell group 1X includes multiple soft-packed cells 1, and for another example, at least one cell group 1X includes one soft-packed cell 1, and at least one cell group 1X includes multiple soft-packed cells 1.

[0197] In some embodiments of the present application, the thickness direction of the soft-pack battery cell 1 is the first direction F1, and the battery cell group 1X includes one soft-pack battery cell 1 or includes multiple soft-pack battery cells 1 arranged flat on a plane perpendicular to the first direction F1. The battery cell group 1X including one soft-pack battery cell 1 is defined as a first battery cell group, and the battery cell group 1X including multiple soft-pack battery cells 1 is defined as a second battery cell group, and multiple soft-pack battery cells 1 in the second battery cell group are arranged flat on a plane perpendicular to the first direction F1.

[0198] Since the multiple soft-pack battery cells 1 in the second battery cell group are laid flat on a plane perpendicular to the first direction F1, it means that any two soft-pack battery cells 1 in the second battery cell group are not stacked along the first direction F1, so there is no need to bend the connection positions of any two adjacent soft-pack battery cells 1 in the second battery cell group, which can save processes and improve production efficiency.

[0199] In this way, since the thickness direction of the soft-pack battery cell 1 is the first direction F1, the thickness of the first battery cell group along the first direction F1 is the thickness of a single soft-pack battery cell 1, and the thickness of the second battery cell group along the first direction F1 is consistent with the thickness of the soft-pack battery cell 1 with the largest thickness in the second battery cell group.

[0200] Therefore, among the multiple battery cell groups 1X stacked along the first direction F1, whether all are first battery cell groups, all are second battery cell groups, or a combination of the first battery cell group and the second battery cell group, the multiple battery cell groups 1X stacked along the first direction F1 have a smaller total thickness along the first direction F1 and occupy a smaller space. Moreover, the flexible bending conductive structure 5 is bent along the thickness direction of the soft-pack battery cell 1, and the length required for the flexible bending conductive structure 5 is short, not easy to break, and the conductivity is reliable.

[0201] Of course, the present application is not limited thereto. In other embodiments of the present application, the length or width direction of the soft-pack battery cell 1 may also be set as the first direction F1.

[0202] Of course, the present application is not limited thereto. In other embodiments of the present application, when the battery cell group 1X includes a plurality of soft-pack battery cells 1 , at least two soft-pack battery cells 1 in the battery cell group 1X may be stacked along the first direction F1 .

[0203] In some embodiments, the multiple soft-packed cells 1 arranged flat in the cell group 1X are arranged along the second direction F2, and two adjacent soft-packed cells 1 are connected at adjacent positions. Therefore, during processing, the soft-packed cells 1 can be arranged in a row along the second direction F2, wherein each two adjacent soft-packed cells 1 are connected at adjacent positions, and can be divided into groups and folded, so that multiple cell groups 1X are stacked along the first direction F1. In the above technical solution, grouping can be performed quickly to improve production efficiency.

[0204] For example, in some embodiments, reference Figure 7-Figure 9 The battery device 100 may include a first battery cell row 10A, the first battery cell row 10A includes a plurality of battery cell groups 1X stacked along a first direction F1, and each battery cell group 1X in the first battery cell row 10A includes one soft-pack battery cell 1.

[0205] Therefore, the first battery cell row 10A has a simple structure and high grouping efficiency, and is conducive to increasing the operating space when connecting two adjacent battery cell groups 1X, reducing the difficulty of connecting the two adjacent battery cell groups 1X, and the connection quality is easy to detect and the connection position is easy to repair, so that the production capacity and reliability of the battery device 100 can be improved.

[0206] For example, combining Figure 7-Figure 9 When producing the first battery cell row 10A, a plurality of soft-pack battery cells 1 may be arranged in sequence along the second direction F2 to present a flattened form (for example Figure 8 As shown), the electrode terminals 12 adjacent to each two adjacent soft-pack battery cells 1 are directly or indirectly connected together to obtain a conductive structure 4, and then each conductive structure 4 is bent into a flexible bent conductive structure 5, so that each two adjacent soft-pack battery cells 1 are transformed from a flat state to a stacked state, and multiple soft-pack battery cells 1 are transformed from a flat state to a form connected end to end in a Z-shape and stacked along a first direction F1.

[0207] As a result, the operating space when connecting the electrode terminals 12 of the two soft-pack battery cells 1 is increased, the difficulty of the connection operation of the electrode terminals 12 of the two soft-pack battery cells 1 is reduced, and the connection quality is easy to detect and the connection position is easy to repair, so that the production capacity and reliability of the battery device 100 can be improved, and the grouping efficiency of the first battery cell row 10A is high.

[0208] For example, in some embodiments, reference Fig.10 , Fig.10 A schematic diagram of a soft-pack battery cell provided in an embodiment of the present application; the first direction F1 is the thickness direction of the soft-pack battery cell 1, the second direction F2 is the length direction of the soft-pack battery cell 1, and the ends of two adjacent soft-pack battery cells 1 on the same side are connected by a flexible bent conductive structure 5.

[0209] In the above technical solution, by setting the first direction F1 as the thickness direction of the soft-pack battery cell 1, and setting the second direction F2 as the length direction of the soft-pack battery cell 1, the ends of the same side of the length direction of two adjacent soft-pack battery cells 1 are connected through a flexible bending conductive structure 5, and the two adjacent soft-pack battery cells 1 are stacked along the thickness direction, so that both the connection of the two adjacent soft-pack battery cells 1 and the bending of the flexible bending conductive structure 5 are very convenient, thereby reducing the processing difficulty of the first battery cell row 10A, shortening the length of the flexible bending conductive structure 5, and saving costs.

[0210] Exemplarily, the first direction F1 is the thickness direction of the soft-pack battery cell 1, and the second direction F2 is the length direction of the soft-pack battery cell 1. Electrode terminals 12 extend from both ends of the soft-pack battery cell 1 in the length direction, and the electrode terminals 12 at the same side ends of two adjacent soft-pack battery cells 1 are directly or indirectly connected to form a flexible bendable conductive structure 5.

[0211] In this way, by setting the first direction F1 as the thickness direction of the soft-pack battery cell 1, setting the second direction F2 as the length direction of the soft-pack battery cell 1, and setting the electrode terminal 12 to extend from both ends of the soft-pack battery cell 1 in the length direction, the processing difficulty of the soft-pack battery cell 1 is reduced, and the two ends of the soft-pack battery cell 1 in the length direction can be easily connected to the corresponding side ends of the adjacent stacked soft-pack battery cells 1 through the flexible bending conductive structure 5, thereby shortening the length of the flexible bending conductive structure 5 and saving costs.

[0212] In some embodiments, reference Figure 7 The length of each soft-pack battery cell 1 in the first battery cell row 10A is the same and the width of each soft-pack battery cell 1 is the same, and the specifications of the multiple soft-pack battery cells 1 can be almost the same, which is conducive to the processing of the soft-pack battery cells 1. When arranging, there is no need to consider the differences between the shapes of different soft-pack battery cells 1 to affect the arrangement, thereby improving production efficiency.

[0213] In addition, it is also beneficial to achieve the center alignment of each two adjacent soft-packed cells 1 in the first cell row 10A. Among them, the "center" of the soft-packed cell 1 refers to the intersection of the length centerline and the width centerline of the soft-packed cell 1. Each adjacent soft-packed cell 1 in the first cell row 10A is stacked and aligned along the first direction F1, so that the two side edges in the width direction and the two side edges in the length direction of each two adjacent soft-packed cells 1 are aligned respectively, and the space occupied by all the soft-packed cells 1 in the length direction of the soft-packed cells 1 in the first cell row 10A is consistent with the space occupied by one soft-packed cell 1 in the length direction, and the space occupied by all the soft-packed cells 1 in the first cell row 10A in the width direction of the soft-packed cells 1 is consistent with the space occupied by one soft-packed cell 1 in the width direction. Therefore, the space occupied by the entire first cell row 10A along the length direction and width direction of the soft-packed cells 1 is greatly reduced, which is beneficial to improve the energy density of the battery device.

[0214] refer to Fig.11 , Fig.11 A schematic diagram of a battery device provided in an embodiment of the present application; in some embodiments, when the second direction F2 is the length direction of the soft-pack battery cell 1, the battery device 100 may include a plurality of first battery cell rows 10A arranged along the second direction F2. In the above technical solution, when the overall spatial dimension of the battery device 100 along the second direction F2 is large, by setting the second direction F2 as the length direction of the soft-pack battery cell 1, and the battery device 100 includes a plurality of first battery cell rows 10A arranged along the second direction F2, the length of a single soft-pack battery cell 1 can be reduced, the processing difficulty of a single soft-pack battery cell 1 can be reduced, and the structural strength and structural stability of a single soft-pack battery cell 1 can be improved.

[0215] In some embodiments, reference Fig.10 and Fig.11 By arranging two first battery cell rows 10A adjacent to each other along the second direction F2 and connecting them through an inter-row conductive structure 41, the first battery cell rows 10A adjacent to each other along the second direction F2 can be connected in series or in parallel. On the one hand, the electrode output of the plurality of first battery cell rows 10A can be simplified, and on the other hand, the power parameter design requirements of the battery device 100 can be met.

[0216] For example, refer to Fig.11 , in two first battery cell rows 10A arranged adjacently along the second direction F2, the adjacent ends of two battery cell groups 1X located at the ends in the first direction F1 and opposite to each other along the second direction F2 are connected by an inter-row conductive structure 41. Thus, the inter-row conductive structure 41 can be located at one end along the first direction F1 between the two first battery cell rows 10A connected thereto, thereby shortening the length of the inter-row conductive structure 41, reducing costs, saving the space occupied by the inter-row conductive structure 41 in the battery device 100, and improving the energy density of the battery device 100.

[0217] For example, in two first cell rows 10A adjacently arranged in the second direction F2, the electrode terminals 12 at adjacent ends of two cell groups 1X located at the ends in the first direction F1 and opposite to each other in the second direction F2 are directly or indirectly connected to form an inter-row conductive structure 41, thereby facilitating processing.

[0218] Of course, the present application is not limited thereto, and when the length of a single soft-pack battery cell 1 is relatively long, for example, when the soft-pack battery cell 1 is in the form of a blade, the battery device 100 may also be configured to include only one first battery cell row 10A.

[0219] For example, in some other embodiments, reference Figure 12-13 , Fig.12 A schematic diagram of another battery cell row provided in an embodiment of the present application; Fig.13 for Fig.12 A schematic diagram of a processing state of a battery cell row shown in FIG. 1 ; the battery device 100 includes a second battery cell row 10B, the second battery cell row 10B includes a plurality of battery cell groups 1X stacked along a first direction F1, and at least one battery cell group 1X in the second battery cell row 10B includes a plurality of soft-pack battery cells 1. Thus, the number of flexible bending conductive structures 5 can be reduced, thereby reducing the number of bending conductive structures 4, and further improving the grouping efficiency of the second battery cell row 10B.

[0220] That is to say, at least one cell group 1X in the second cell row 10B includes a plurality of soft-pack cells 1. For example, each cell group 1X in the second cell row 10B includes a plurality of soft-pack cells 1; for another example, some cell groups 1X in the second cell row 10B include a plurality of soft-pack cells 1, and at the same time, some cell groups 1X in the second cell row 10B include only one soft-pack cell 1. When the cell group 1X includes a plurality of soft-pack cells 1, the conductive structure 4 connecting the plurality of soft-pack cells 1 in the cell group 1X does not need to be bent.

[0221] For example, reference Figure 12-13 , the first direction F1 is the thickness direction of the soft-pack battery cell 1, and all the soft-pack battery cells 1 in the battery cell group 1X including a plurality of soft-pack battery cells 1 are laid flat on a plane perpendicular to the first direction F1. That is, any two soft-pack battery cells 1 in the battery cell group 1X including a plurality of soft-pack battery cells 1 are not stacked along the first direction F1. Therefore, there is no need to bend the connection positions of two adjacent soft-pack battery cells 1 in the same battery cell group 1X, thereby saving processes and improving production efficiency. In short, in the above technical solution, the multiple soft-pack battery cells 1 in the battery cell group 1X do not need to introduce an additional bending process due to the need to be stacked along the first direction F1, thereby improving the grouping efficiency.

[0222] For example, reference Figure 12-13The second direction F2 is the length direction of the soft-pack battery cell 1. The multiple soft-pack battery cells 1 included in the battery cell group 1X in the second battery cell row 10B are arranged along the second direction F2. The adjacent ends of two adjacent soft-pack battery cells 1d are connected by a conductive structure 4. The conductive structure 4 located at the end of the battery cell group 1X along the second direction F2 is a flexible structure and is bent to form a flexible bent conductive structure 5.

[0223] Thus, when producing the second battery cell row 10B, the plurality of soft-pack battery cells 1 may be arranged in sequence along the second direction F2 to present a flattened form, and then the adjacent ends of each two adjacent soft-pack battery cells 1 are connected (for example, the adjacent electrode terminals 12 are directly or indirectly connected together) to obtain a conductive structure 4, and then the two conductive structures 4 at both ends of each battery cell group 1X along the second direction F2 are respectively bent (for example, Fig.13 As shown), a flexible bent conductive structure 5 is formed, so that each two adjacent battery cell groups 1X are transformed from a flattened state to a stacked state, and multiple battery cell groups 1X are transformed from a flattened state to a form of being connected end to end in a Z-shape and stacked along a first direction F1, thereby making the grouping efficiency of the second battery cell row 10B higher.

[0224] In the above technical solution, by setting the first direction F1 as the thickness direction of the soft-pack battery cell 1, and the second direction F2 as the length direction of the soft-pack battery cell 1, the multiple soft-pack battery cells 1 included in the battery cell group 1X in the second battery cell row 10B are arranged along the second direction F2, and the adjacent ends of two adjacent soft-pack battery cells 1d are connected through a conductive structure 4. The conductive structure 4 located at the end of the battery cell group 1X along the second direction F2 is a flexible structure and is bent to form a flexible bent conductive structure 5, thereby improving the grouping efficiency of the second battery cell row 10B, shortening the length of the conductive structure 4 and the flexible bent conductive structure 5, and saving costs.

[0225] In some embodiments, when the multiple soft-packed cells 1 included in the cell group 1X in the second cell row 10B are arranged along the second direction F2, the total length of each cell group 1X in the second cell row 10B along the second direction F2 is consistent. It is worth noting that the number of soft-packed cells 1 included in each cell group 1X in the second cell row 10B can be the same or different, for example, it can be one or more. When the cell group 1X includes only one soft-packed cell 1, the total length of the cell group 1X along the second direction F2 is the length of a single soft-packed cell 1; when the cell group 1X includes a plurality of soft-packed cells 1 arranged along the second direction F2, the total length of the cell group 1X along the second direction F2 is slightly greater than the sum of the lengths of the multiple single soft-packed cells 1 included therein. Therefore, the space occupied by all the cell groups 1X in the second cell row 10B along the second direction F2 is consistent with the space occupied by a single cell group 1X along the second direction F2, which can reduce the space occupied in the second direction F2 and is beneficial to improving the energy density of the battery device 100.

[0226] It is worth noting that the number of soft-pack batteries 1 included in each battery cell group 1X in the second battery cell row 10B can be the same or different, the arrangement of the multiple soft-pack batteries 1 included in each battery cell group 1X in the second battery cell row 10B can be the same or different, and the appearance of each soft-pack battery 1 in the second battery cell row 10B can be the same or different.

[0227] For example, reference Figure 12-13 , each battery cell group 1X in the second battery cell row 10B includes soft-pack battery cells 1 with the same appearance, the same arrangement and the same number, that is, all the soft-pack battery cells 1 in the second battery cell row 10B have the same appearance (i.e., shape and size), the number of soft-pack battery cells 1 included in each battery cell group 1X in the second battery cell row 10B is the same, and the arrangement of the multiple soft-pack battery cells 1 in each battery cell group 1X is the same. As a result, the multiple battery cell groups 1X have no difference in appearance, which is conducive to the mass production of the battery cell groups 1X, and when arranging, there is no need to consider the differences between the appearances of different soft-pack battery cells 1 to affect the arrangement, thereby improving production efficiency, and when selecting the conductive structure 4 to be bent, the same number of soft-pack battery cells 1 are grouped to avoid the problem of wrong number counting.

[0228] In addition, it is also beneficial to achieve the overlap of the projections of multiple battery cell groups 1X in the second battery cell row 10B along the first direction F1 after they are stacked, so that the edges of each adjacent two battery cell groups 1X in the second battery cell row 10B are aligned, so that the second battery cell row 10B formed after such multiple battery cell groups 1X are stacked along the first direction F1 as a whole occupies the same space perpendicular to the first direction F1 as the space occupied by a single battery cell group 1X in the second battery cell row 10B perpendicular to the first direction F1, thereby reducing the space occupied by the second battery cell row 10B as a whole perpendicular to the first direction F1, improving the energy density of the battery device 100, and also facilitating the realization of consistent specifications of each flexible bent conductive structure 5 in the second battery cell row 10B, rather than some being longer and some being shorter, which facilitates processing, facilitates mass production, and makes the overall conductive performance of the battery device 100 easy to control.

[0229] In addition, when the overall spatial dimension of the battery device 100 along the second direction F2 is large, by setting the second direction F2 as the length direction of the soft-pack battery cell 1, the plurality of soft-pack battery cells 1 included in the battery cell group 1X in the second battery cell row 10B are arranged along the second direction F2, and the battery device 100 may be provided with only one second battery cell row 10B (for example, Fig.14 As shown, Fig.14Schematic diagram of a battery device provided in an embodiment of the present application), thereby reducing the length of a single soft-pack battery cell 1 and reducing the difficulty of processing a single soft-pack battery cell 1. Moreover, this design can also facilitate the electrode output of the battery device 100, that is, the electrodes of the two battery cell groups 1X at both ends of the second battery cell row 10B located at the first direction F1 can be output at the ends away from each other along the second direction F2. Of course, the present application is not limited to this. For example, in other embodiments of the present application, the battery device 100 can also be provided with multiple second battery cell rows 10B in the second direction F2 (this embodiment is not shown in the figure).

[0230] In addition, in some embodiments of the present application, the battery device 100 may also include a first battery cell row 10A and a second battery cell row 10B (for example, Fig.15 As shown, Fig.15 Schematic diagram of another battery device provided in an embodiment of the present application), the relative arrangement of the first battery cell row 10A and the second battery cell row 10B is not limited, for example, they can be arranged along the first direction F1. The adjacent ends of the first battery cell row 10A and the second battery cell row 10B can also be connected by the inter-row conductive structure 41, thereby simplifying the electrode output and realizing series-parallel connection.

[0231] In some embodiments of the present application, Figure 6 The soft-pack battery cell 1 includes a soft-pack shell 11 and an electrode terminal 12, the electrode terminal 12 is connected to the electrode assembly in the soft-pack shell 11, and includes a lead-out portion 121 extending out of the soft-pack shell 11, and the lead-out portions 121 adjacent to adjacent soft-pack shells 11 are directly or indirectly connected to form a conductive structure 4, and the conductive structure 4 located at the end of the battery cell group 1X along the second direction F2 is a flexible structure and is bent to form a flexible bent conductive structure 5.

[0232] That is to say, whether it is two adjacent soft-packed cells 1 along the first direction F1 or two adjacent soft-packed cells 1 along the second direction F2, the electrode terminals 12 on the adjacent sides can be connected together to form a conductive structure 4. It is not required that each conductive structure 4 can be flexibly deformed, but the conductive structure 4 located at the end of the cell group 1X along the second direction F2 and used to connect two adjacent cell groups 1X needs to have the ability to flexibly deform, so that the flexible bending conductive structure 5 can be formed through its flexible deformation. For example, combined with Fig.13 When the battery cell group 1X includes a plurality of soft-pack battery cells 1, the conductive structure 4 connected between adjacent soft-pack battery cells 1 in the same battery cell group 1X may or may not have the ability to be flexibly deformed.

[0233] In this way, the electrode terminals 12 of the two soft-pack battery cells 1 can be directly or indirectly connected to obtain a conductive structure 4 including at least two electrode terminals 12 after the connection, and the electrical connection of the two soft-pack battery cells 1 is achieved through the conductive structure 4, and at least the conductive structure 4 located at the end of the battery cell group 1X along the second direction F2 can be flexibly bent and deformed, so that a flexible bent conductive structure 5 can be obtained through its bending and deformation, so that the two battery cell groups 1X connected by the flexible bent conductive structure 5 can move relative to each other to change their relative positions, so that the two battery cell groups 1X can be transformed into a stacked state along the first direction F1.

[0234] It is worth noting that the relative position of the electrode terminals 12 of the two soft-pack battery cells 1 when connected can be in a flat state, but is not limited to the flat state. For example, they can also be set at an angle, such as one side surface of a soft-pack battery cell 1 in the thickness direction and the other side surface of the soft-pack battery cell 1 in the thickness direction form a large acute angle, or a right angle, or an obtuse angle. This can also increase the operating space when the electrode terminals 12 of the two soft-pack battery cells 1 are connected, reduce the difficulty of the connection operation of the electrode terminals 12 of the two soft-pack battery cells 1, and the connection quality is easy to detect, and the connection position is easy to repair, so that the production capacity and reliability of the battery device 100 can be improved.

[0235] In this way, the two battery cell groups 1X only need to be stacked by bending and deforming the conductive structure 4 after connection, and do not need to be stacked when the two battery cell groups 1X are connected. This can increase the operating space when connecting the electrode terminals 12 of the two soft-pack battery cells 1, reduce the difficulty of connecting the electrode terminals 12 of the two soft-pack battery cells 1, and make the connection quality easy to detect and the connection position easy to repair, so that the production capacity and reliability of the battery device 100 can be improved. Moreover, this connection method can also eliminate the rigid conductive bracket used to connect the two soft-pack battery cells in the related art, reduce the parts, reduce the weight and cost of the battery device 100, and also eliminate the space occupied by the rigid conductive bracket, which is conducive to improving the energy density of the battery device 100.

[0236] Therefore, the conductive structure 4 is formed by connecting the adjacent electrode terminals 12 of two adjacent soft-pack battery cells 1, and the conductive structure 4 located at the end of the battery cell group 1X along the second direction F2 is set as a flexible structure and bent to form a flexible bent conductive structure 5, thereby facilitating the processing of the conductive structure 4 and the flexible bent conductive structure 5, and facilitating shortening the length of the electrode terminal 12, the conductive structure 4 and the flexible bent conductive structure 5, thereby saving production costs.

[0237] In some embodiments of the present application, Figure 6 and Fig.10The second direction F2 is the length direction of the soft-pack battery cell 1, and electrode terminals 12 extend from both ends of the soft-pack battery cell 1 in the length direction. Adjacent soft-pack battery cells 1 are connected through adjacently arranged electrode terminals 12. That is, for any two adjacently arranged soft-pack battery cells 1, their adjacently arranged electrode terminals 12 are directly or indirectly connected to each other, thereby realizing the connection between the two soft-pack battery cells 1. The battery cell group 1X includes one soft-pack battery cell 1 or includes a plurality of soft-pack battery cells 1 arranged in sequence along the second direction F2.

[0238] For example, the length direction of the soft-pack battery cell 1 is the left-right direction, and the thickness direction of the soft-pack battery cell 1 is the front-to-back direction. During processing, multiple soft-pack battery cells 1 can be first arranged in a row along the left-to-right direction, and every two adjacent electrode terminals 12 can be connected to obtain a bent conductive structure 4, and then the conductive structure 4 at the left end (or right end) of the battery cell group 1X is bent forward, and the conductive structure 4 at the right end (or left end) of the battery cell group 1X is bent backward, so that multiple battery cell groups 1X can be stacked along the front-to-back direction, so that the electrode terminal 12 at the left end of a battery cell group 1X can be connected to the electrode terminal 12 at the left end of the battery cell group 1X adjacent to the front (or rear) thereof, and the electrode terminal 12 at the right end of the battery cell group 1X can be connected to the electrode terminal 12 at the right end of the battery cell group 1X adjacent to the rear (or front) thereof.

[0239] In the above technical solution, the electrode terminal 12 is set to extend from both ends of the soft-pack battery cell 1 in the length direction, thereby reducing the difficulty of processing the soft-pack battery cell 1. Moreover, by setting the second direction F2 as the length direction of the soft-pack battery cell 1, it is convenient to realize that one end of each battery cell group 1X located between the two ends of the first direction F1 along the second direction F2 is electrically connected to the battery cell group 1X upstream along the first direction F1 through the flexible bending conductive structure 5, and the other end along the second direction F2 is electrically connected to the battery cell group 1X downstream along the first direction F1 through the flexible bending conductive structure 5. For example, during processing, multiple soft-pack battery cells 1 can be arranged in a row along the length direction of the soft-pack battery cell 1, and each adjacent two electrode terminals 12 are connected to obtain a conductive structure 4, and then the conductive structure 4 is bent, so that the multiple soft-pack battery cells 1 can be divided into multiple battery cell groups 1X, and the multiple battery cell groups 1X can be stacked along the thickness direction of the soft-pack battery cell 1, thereby simplifying the processing, improving the grouping efficiency, and shortening the length of the flexible bending conductive structure 5. Moreover, the bent conductive structure 4 only occupies the space on both sides of the soft-pack battery cell 1 in the length direction, and does not occupy the space on both sides of the width direction of the soft-pack battery cell 1. When the width direction of the soft-pack battery cell 1 is arranged according to the height direction, the height space occupied by the battery device 100 can be reduced.

[0240] Of course, the present application is not limited thereto, and the two electrode terminals 12 of the soft-packed battery cell 1 can also be disposed at other positions of the soft-packed battery cell 1, for example, the two electrode terminals 12 of the soft-packed battery cell 1 can also be disposed at both ends in the width direction of the soft-packed battery cell 1; for another example, one of the two electrode terminals 12 of the soft-packed battery cell 1 is disposed at one end in the width direction of the soft-packed battery cell 1, and the other is disposed at one end in the length direction of the soft-packed battery cell 1, etc. Therefore, based on the different distribution positions of the electrode terminals 12, the arrangement form of the multiple soft-packed battery cells 1 in the battery cell group 1X can be flexibly selected.

[0241] In some embodiments, reference Figure 7-Figure 9 ,as well as Fig.12 and Fig.13 The first direction F1 is the thickness direction of the soft-pack battery cell 1 , the width direction of the soft-pack battery cell 1 is the third direction F3 , and the projections of two battery cell groups 1X stacked and adjacently arranged along the first direction F1 overlap along the first direction F1 .

[0242] In the above technical solution, since the first direction F1 is the thickness direction of the soft-pack battery cell 1, it is beneficial to reduce the space occupied along the first direction F1 after multiple battery cell groups 1X are stacked along the first direction F1, and the space occupied by the battery cell row 10 as a whole perpendicular to the first direction F1 formed after such multiple battery cell groups 1X are stacked along the first direction F1 is the same as the space occupied by a single battery cell group 1X in the battery cell row 10 perpendicular to the first direction F1, thereby reducing the space occupied by the battery cell row 10 as a whole perpendicular to the first direction F1 and improving the energy density of the battery device 100.

[0243] In some embodiments of the present application, reference Fig.16 , Fig.16 This is a partial schematic diagram of a battery cell row provided in some embodiments of the present application, in which the lead-out portions 121 from two soft-pack battery cells 1 in the flexible bending conductive structure 5 are overlapped and connected. In other words, the lead-out portion 121 of the soft-pack battery cell 1 in one battery cell group 1X is overlapped and connected with the lead-out portion 121 of the soft-pack battery cell 1 in the adjacent battery cell group 1X.

[0244] In this way, two adjacent battery cell groups 1X can be connected by directly overlapping the lead-out parts 121 of the soft-pack battery cells 1, so that the two battery cell groups 1X have a larger connection area, so that the connection and fixation of the two battery cell groups 1X are more stable and reliable. Moreover, compared with the indirect connection, the direct connection can simplify the structure, reduce the parts, improve the assembly efficiency, further improve the grouping efficiency, and increase the production capacity.

[0245] For example, the lead portion 121 can be set as a bendable and deformable metal sheet, so that the conductive structure 5 can be bent or flexibly bent by overlapping at least one lead portion 121. For example, the electrode terminal 12 can be a protruding part of the electrode sheet in the electrode assembly, such as an aluminum sheet or a copper sheet.

[0246] For example, reference Fig.16 The two lead-out portions 121 forming the overlapped connection can be connected by welding or conductive adhesive at the overlapped connection. This is not only easy to operate, but also can achieve a relatively stable and reliable electrical connection.

[0247] For example, reference Fig.16 , the overlapping connection position P1 of the two lead portions 121 in the flexible bending conductive structure 5 is staggered from the bending position P2 of the flexible bending conductive structure 5. Therefore, on the one hand, the flexible bending conductive structure 5 can be bent relatively easily, and the bending has no adverse effect on the reliability and stability of the overlapping connection between the lead portions 121, thereby improving the connection reliability and electrical connection stability between the battery cell groups 1X.

[0248] In some embodiments of the present application, reference Fig.16 , the bending position P2 of the flexible bending conductive structure 5 is centered, and the overlapping connection position P1 of the two lead-out portions 121 in the flexible bending conductive structure 5 is located on one side of the bending position P2 in the first direction F1 and is opposite to the corresponding battery cell group 1X in the second direction F2. In other words, along the extension direction of the flexible bending conductive structure 5, the distance from the bending position P2 of the flexible bending conductive structure 5 to each battery cell group 1X is equal, which is conducive to improving the structural stability of the flexible bending conductive structure 5 and reducing the stress concentration of the flexible bending conductive structure 5.

[0249] In some embodiments of the present application, reference Fig.16The two lead-out portions 121 forming the overlapping connection in the flexible bending conductive structure 5 are respectively the first lead-out portion 1211 and the second lead-out portion 1212, the battery cell group 1X extending from the first lead-out portion 1211 is the first battery cell group 1Xa, and the battery cell group 1X extending from the second lead-out portion 1212 is the second battery cell group 1Xb, the first battery cell group 1Xa and the second battery cell group 1Xb are stacked adjacently, the length of the first lead-out portion 1211 is greater than the length of the second lead-out portion 1212, and the first lead-out portion 1211 includes an extension section 12111, a bending section 1212, and a second battery cell group 1Xa. 2112 and the overlapping section 12113, the extension section 12111 is opposite to the first battery cell group 1Xa along the second direction F2, the overlapping section 12113 is spaced from the extension section 12111 along the first direction F1, the overlapping section 12113 is opposite to the second battery cell group 1Xb along the second direction F2, the bent section 12112 is bent and its two ends are respectively connected to the extension section 12111 and the overlapping section 12113, the second lead-out portion 1212 is opposite to the second battery cell group 1Xb along the second direction F2, and is overlapped and connected with the overlapping section 12113.

[0250] Thus, it is relatively easy to achieve that the overlapping connection position P1 of the two lead-out portions 121 in the flexible bending conductive structure 5 is staggered with the bending position P2 of the flexible bending conductive structure 5, and the bending is relatively easy. It is worth noting that, along the first direction F1, any one of the two adjacent battery cell groups 1X can be selected as the first battery cell group 1Xa, and the other can be selected as the second battery cell group 1Xb.

[0251] Exemplarily, the second direction F2 is the length direction of the soft-packed battery cell 1, and the two ends of each soft-packed battery cell 1 in the length direction respectively have a first lead-out portion 1211 and a second lead-out portion 1212. In this way, by setting the two lead-out portions 121 of each soft-packed battery cell 1 in the length direction to be one long and one short, for example, the length direction of the soft-packed battery cell 1 is the left-right direction, the lead-out portion 121 on the left is shorter, and the lead-out portion 121 on the right is longer, when a plurality of soft-packed battery cells 1 are arranged in a row along the length direction of the soft-packed battery cells 1, they can be arranged in the above manner, so that the connection points of each two adjacent soft-packed battery cells 1 can be connected by a lead-out portion 121 with one long and one short.

[0252] Of course, this application is not limited to this, Fig.17 , Fig.17 The partial schematic diagram of the battery cell row provided for other embodiments of the present application can also be set to have the same length of the two lead-out portions 121 constituting the overlapped connection in the flexible bending conductive structure 5, and the bending position P2 of the flexible bending conductive structure 5 is located at the stacked non-connected portion of the two lead-out portions 121. Therefore, when producing the soft-pack battery cell 1, the two lead-out portions 121 at both ends of the soft-pack battery cell 1 can be cut to equal lengths. When arranging multiple soft-pack battery cells 1, there is no need to select the placement direction due to the different lengths of the lead-out portions 121, thereby improving production efficiency.

[0253] In some embodiments of the present application, reference Fig.18 , Fig.18 A partial schematic diagram of a battery cell row provided in some further embodiments of the present application, wherein the lead-out portions 121 from two soft-pack battery cells 1 in the flexible bendable conductive structure 5 are indirectly connected via a adapter sheet 122, that is, the lead-out portions 121 of the soft-pack battery cells 1 in one battery cell group 1X are overlapped and connected with the lead-out portions 121 of the soft-pack battery cells 1 in an adjacent battery cell group 1X.

[0254] Thus, by providing the adapter sheet 122 to connect the lead-out portions 121 of the two soft-pack battery cells 1, the length of the lead-out portions 121 can be shortened, and the processing difficulty of the soft-pack battery cells 1 can be reduced. In addition, the standardized adapter sheet 122 can be used for fast and efficient connection processing, so that multiple soft-pack battery cells 1 can be conveniently and efficiently connected, and the conductive performance of each flexible bent conductive structure 5 is consistent.

[0255] Among them, at least one of the lead-out portion 121 and the adapter sheet 122 constituting the overlap connection can be bent, so that the bending position P4 of the flexible bending conductive structure 5 is located at at least one of the lead-out portion 121 and the adapter sheet 122. For example, the adapter sheet 122 is a bendable and deformable metal sheet, so that the flexible bending conductive structure 5 can be bent by bending the adapter sheet 122. For another example, the lead-out portion 121 is a bendable and deformable metal sheet, so that the flexible bending conductive structure 5 can be bent by bending the lead-out portion 121.

[0256] In some embodiments of the present application, reference Fig.18 , the adapter 122 is overlapped and connected with the lead-out portion 121. Therefore, the adapter 122 is overlapped and connected with the lead-out portion 121, so that the adapter 122 and the lead-out portion 121 have a larger connection area, so that the connection and fixation of the two battery cell groups 1X are more stable and reliable. Among them, the specific method of overlapping the adapter 122 and the lead-out portion 121 is not limited, for example, it can be overlapped and bonded by conductive glue, or overlapped and welded, etc., which is not only easy to operate, but also can achieve a more stable and reliable electrical connection.

[0257] In some embodiments of the present application, reference Fig.18 The overlapping connection position P3 of the adapter plate 122 and the lead-out portion 121 is staggered from the bending position P4 of the flexible bending conductive structure 5 .

[0258] That is to say, the flexible bendable conductive structure 5 does not bend at the overlapping connection position P3 between the adapter plate 122 and the lead-out portion 121. This allows the flexible bendable conductive structure 5 to bend more easily, and the bending has no adverse effect on the reliability and stability of the overlapping connection between the adapter plate 122 and the lead-out portion 121, thereby improving the connection reliability and electrical connection stability between the battery cell groups 1X.

[0259] In some embodiments of the present application, reference Fig.18 The flexible bent conductive structure 5 is bent at the adapter sheet 122 , and the bending position P4 of the flexible bent conductive structure 5 is centered.

[0260] That is to say, along the extension direction of the flexible bending conductive structure 5, the distance from the bending position P4 of the flexible bending conductive structure 5 to each battery cell group 1X is equal, which is conducive to improving the structural stability of the flexible bending conductive structure 5 and reducing the stress concentration of the flexible bending conductive structure 5. In addition, the length of the adapter sheet 122 can be relatively long, a part of which is used to overlap with the lead-out portion 121, and the rest of the part is used for bending, so that the design of the lead-out portion 121 can be simplified and the length of the lead-out portion 121 can be further shortened.

[0261] In some embodiments of the present application, reference Figure 16-Figure 18 , the bending position of the flexible bending conductive structure 5 is staggered with the connection and conductive position of the two battery cell groups 1X in the flexible bending conductive structure 5. Figure 16-Figure 17 The bending position P2 shown in FIG. 1 is staggered with the overlapping connection position P1. Fig.18 The bending position P4 shown in FIG. 1 is offset from the overlapping connection position P3 .

[0262] It is worth noting that the connection between the two battery cell groups 1X in the flexible bending conductive structure 5 is not limited to the direct connection by overlapping and the indirect connection through the adapter sheet 122. For example, the connection can also be achieved through perforation and other schemes. However, the connection position will form conductivity, thereby realizing the electrical connection of the two battery cell groups 1X through the flexible bending conductive structure 5. In this way, the position where the connection occurs and the conductivity is formed is the connection conductive position of the two battery cell groups 1X (for example Figure 16-Figure 17 The overlapping connection position P1 shown in FIG. Fig.18 The overlapping connection position P3 shown in FIG.

[0263] Therefore, by setting the bending position of the flexible bending conductive structure 5 to be staggered with the connection conductive position of the two battery cell groups 1X in the flexible bending conductive structure 5, on the one hand, the flexible bending conductive structure 5 can be bent more easily, and the bending has no adverse effect on the connection reliability and stability of the two battery cell groups 1X in the flexible bending conductive structure 5, thereby improving the connection reliability and electrical connection stability between the battery cell groups 1X.

[0264] In some embodiments of the present application, reference Figure 16-Figure 18 , the bending corner position of the flexible bending conductive structure 5 (for example Figure 16-Figure 17 The bending position P2 shown in FIG. Fig.18 The bending position P4 shown in FIG. 1 is a rounded corner. Thus, the stress concentration problem at the bending position can be reduced, and the connection reliability and conductive stability of two adjacent battery cell groups 1X can be improved.

[0265] The shape of the flexible bending conductive structure 5 is not limited. For example, the flexible bending conductive structure 5 is U-shaped, that is, the flexible bending conductive structure 5 can also be formed into a U-shaped structure with two bending corners (for example Figure 16-Figure 17 As shown), thereby saving space; for another example, the flexible bending conductive structure 5 is C-shaped, that is, the flexible bending conductive structure 5 can be formed into a C-shaped structure having a bending corner (for example Fig.18 As shown), the processing difficulty can be reduced.

[0266] In some embodiments of the present application, reference Figure 6 , and combined with Figure 19-20 , Fig.19 A schematic diagram of a battery cell row and a mounting bracket provided in some embodiments of the present application; Fig. 20 for Fig.19 The middle frame shows an enlarged view of the C portion. The two side edges of the battery cell group 1X in the third direction F3 are respectively the first edge 1X1 and the second edge 1X2, and the flexible bending conductive structure 5 is arranged close to the first edge 1X1 relative to the second edge 1X2 in the third direction F3, so as to form a first reserved space S1 on one side of the flexible bending conductive structure 5 close to the second edge 1X2.

[0267] The first direction F1 , the second direction F2 and the third direction F3 are perpendicular to each other. For example, the first direction F1 is the thickness direction of the soft-pack battery cell 1 , the second direction F2 is the length direction of the soft-pack battery cell 1 , and the third direction F3 is the width direction of the soft-pack battery cell 1 .

[0268] Therefore, the first reserved space S1 can be used to accommodate other components, and the space of the battery device 100 where the flexible bending conductive structure 5 is arranged in the third direction F3 can be fully utilized to reduce the occupation of other spaces, thereby facilitating improving the energy density of the battery device 100.

[0269] In some embodiments of the present application, Figure 6 and Fig. 20 The flexible bending conductive structure 5 is located on the side of the center line CL of the battery cell group 1X in the third direction F3 close to the first edge 1X1. The center line CL refers to a line that is the same distance from the first edge 1X1 and the second edge 1X2 in the third direction F3.

[0270] Therefore, the size of the first reserved space S1 along the third direction F3 can exceed more than half of the size of the battery cell group 1X along the third direction F3, so that the first reserved space S1 can accommodate more components and more fully utilize the space of the battery device 100 where the flexible bending conductive structure 5 is set in the third direction F2, so as to reduce the occupation of other spaces, thereby facilitating improving the energy density of the battery device 100.

[0271] In some embodiments of the present application, Figure 3 , Fig. 20 and Fig.21 , Fig.21 for Figure 3 In the enlarged view of the circled portion B, the battery device 100 includes a box 20 for loading soft-pack battery cells 1, and a reinforcing partition 2 is sandwiched between at least two adjacent battery cell groups 1X along the first direction F1. The rigidity of the reinforcing partition 2 is greater than the rigidity of the soft-pack shell 11 of the soft-pack battery cells 1. The reinforcing partition 2 has a connecting portion 23 protruding from the battery cell group 1X along the second direction F2, and the connecting portion 23 extends into the first reserved space S1 and is connected to the box 20.

[0272] There may be a reinforcing partition 2 between every two adjacent battery cell groups 1X, or there may be a reinforcing partition 2 between some adjacent battery cell groups 1X, while there is no reinforcing partition 2 between other adjacent battery cell groups 1X. The rigidity of the reinforcing partition 2 is greater than that of the soft package shell 11.

[0273] Therefore, the characteristic that the stiffness of the reinforced partition 2 is greater than the stiffness of the soft-pack shell 11 can be utilized, so that the reinforced partition 2 can improve the deformation problem of the soft-pack battery cell 1. Moreover, by strengthening the connection between the partition 2 and the box body 20, the reinforced partition 2 can more reliably and stably support the battery cell group 1X, thereby improving the stability of the battery device 100.

[0274] Furthermore, since the reinforcing partition 2 is connected to the box body 20 via the connecting portion 23 extending to the first reserved space S1, the occupation of other spaces can be reduced, and the space saved along the third direction F3 by the flexible bending conductive structure 5 can be effectively utilized, which is beneficial to improving the energy density of the battery device 100.

[0275] In the above solution, the soft-pack battery cell 1 may or may not be connected to the box body 20 , and the connection may be achieved by, for example, glue filling or the like.

[0276] In some embodiments of the present application, Figure 3 , Fig. 20 and Fig.21The box body 20 includes a box body 7 and a mounting bracket 8 . The mounting bracket 8 is installed in the box body 7 . The mounting bracket 8 is disposed on one side of the battery cell group 1X in the second direction F2 . The connecting portion 23 is connected to the mounting bracket 8 .

[0277] In the above technical solution, by arranging the mounting bracket 8 in the box body 7 and connecting the reinforcing partition 2 with the box body 20 through the mounting bracket 8, the connection difficulty of the reinforcing partition 2 with the box body 20 can be reduced, and the flexible installation of the reinforcing partition 2 and the box body 20 can be achieved. For example, the reinforcing partition 2 can be first installed on the mounting bracket 8, and then the mounting bracket 8 can be installed in the box body 7, or the mounting bracket 8 can be first installed in the box body 7, and then the reinforcing partition 2 can be connected with 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 between it and the reinforcing partition 2 and improve the connection reliability between it and the reinforcing partition 2. In addition, the material of the mounting bracket 8 can be flexibly selected to improve the reliability and stability of the mounting bracket 8 fixing the battery cell row 10. In addition, by arranging the mounting bracket 8 on one side of the battery cell group 1X in the second direction F2, the connection portion 23 of the reinforcing partition 2 protruding from the battery cell group 1X along the second direction F2 can easily approach the mounting bracket 8 and form a connection with the mounting bracket 8.

[0278] The connection method between the box body 7 and the mounting bracket 8 is not limited, and can be a detachable connection or a non-detachable connection. 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 7 and the mounting bracket 8 is not limited, for example, it can be screwed, riveted, welded, etc.

[0279] In some embodiments of the present application, Fig. 20 The side edge of the connecting portion 23 in the third direction F3 close to the second edge 1X2 is the first edge 231, the side edge of the mounting bracket 8 in the third direction F3 close to the second edge 1X2 is the second edge 83, and the first edge 231 and the second edge 83 are both located on the side of the second edge 1X2 close to the first edge 1X1, so that the connecting portion 23 and the mounting bracket 8 in the third direction F3 away from the first edge 1X1 form a second reserved space S2.

[0280] In the above technical solution, by forming a second reserved space S2 on the side of the connecting portion 23 and the mounting bracket 8 in the third direction F3 away from the first edge 1X1, the second reserved space S2 can be used to arrange other components of the battery device 100, for example, it can be used to arrange circuits, etc., thereby reducing the space occupied at other locations, which is beneficial to improving the compactness and energy density of the battery device 100.

[0281] For example, the third direction F3 is the up and down direction, the second edge 1X2 is the upper edge of the battery cell group 1X, the first edge 1X1 is the lower edge of the battery cell group 1X, the connecting portion 23 is located above the flexible bending conductive structure 5, the upper edge of the connecting portion 23 is the first edge 231, and the upper edge of the mounting bracket 8 is the second edge 83. The first edge 231 and the second edge 83 are both lower than the upper edge of the battery cell group 1X (ie, the second edge 1X2), thereby forming a second reserved space S2 above the connecting portion 23 and the mounting bracket 8.

[0282] In the above technical solution, by setting the size of the connecting part 23 in the up and down directions to be relatively small, space can be formed above and below the connecting part 23, for example, the upper part can be used for wiring, and the lower part can be used to set the flexible bending conductive structure 5, so that the vertical space at the connecting part 23 can be fully utilized, and the space occupied at other positions can be reduced, which is beneficial to improving the compactness and energy density of the battery device 100.

[0283] In some embodiments of the present application, Figure 3 and Fig.21 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. A plurality of mounting brackets 8 arranged along the first direction F1 are respectively provided at both ends of the box body 7 on the second direction F2.

[0284] In the above technical solution, since multiple battery cell groups 1X are stacked along the first direction F1, when a reinforcing partition 2 is sandwiched between two adjacent battery cell groups 1X along the first direction F1, and multiple reinforcing partitions 2 are sandwiched between multiple battery cell groups 1X stacked along the first direction F1, by providing multiple mounting brackets 8, it is convenient to flexibly connect with multiple reinforcing partitions 2 arranged along the first direction F1, thereby reducing the difficulty of connecting the reinforcing partitions 2 and the mounting brackets 8. Moreover, the mounting brackets 8 are provided at both ends of the box body 7 in the second direction F2, thereby reducing the difficulty of connecting the mounting brackets 8 and the box body 7.

[0285] In some embodiments of the present application, Figure 3 and Fig.21 , the thickness direction of the soft-pack battery cell 1 is the first direction F1, the battery cell group 1X includes one soft-pack battery cell 1 or includes a plurality of soft-pack battery cells 1 laid flat on a plane perpendicular to the first direction F1, that is, any two soft-pack battery cells 1 in the battery cell group 1X including the plurality of soft-pack battery cells 1 are not stacked along the first direction F1, so there is no need to bend the connection positions of two adjacent soft-pack battery cells 1 in the same battery cell group 1X, thereby saving processes and improving production efficiency. In short, the plurality of soft-pack battery cells 1 in the battery cell group 1X do not need to introduce an additional bending process due to the need to be stacked along the first direction F1, thereby improving grouping efficiency.

[0286] Therefore, no matter whether the battery cell group 1X includes one soft-pack battery cell 1 or multiple soft-pack battery cells 1 arranged flat on a plane perpendicular to the first direction F1, the thickness of the battery cell group 1X along the first direction F1 is consistent with the thickness of the soft-pack battery cell 1 with the largest thickness in the battery cell group 1X. Fig.21 In some embodiments, a reinforcing partition 2 is provided between the battery cell groups 1X adjacent to each other along the first direction F1, the rigidity of the reinforcing partition 2 is greater than the rigidity of the soft-pack shell 11 of the soft-pack battery cell 1, the thickness direction of the reinforcing partition 2 may also be the first direction F1, the thickness T1 of the reinforcing partition 2 is less than the thickness T2 of the battery cell group 1X, and the reinforcing partition 2 is configured to be able to heat exchange with the electrode assembly in the soft-pack battery cell 1 through the soft-pack shell 11 in contact therewith. In this embodiment, the reinforcing partition 2 may include the above-mentioned connecting portion 23, or may not include the above-mentioned connecting portion 23, may be connected to the box body 20, or may not be connected to the box body 20, and when connected to the box body 20 but does not include the connecting portion 23, it may be connected to the box body 20 through other parts of the reinforcing partition 2.

[0287] In the above technical solution, the reinforcing separator 2 is configured to be able to exchange heat with the electrode assembly in the soft-pack battery cell 1 through the soft-pack shell 11 in contact with it, that is, the reinforcing separator 2 can form heat exchange with the electrode assembly in which soft-pack shell 11 it contacts. It can be understood that the intermediate medium for heat transfer between the reinforcing separator 2 and the electrode assembly includes but is not limited to the soft-pack shell 11, for example, the soft-pack shell 11 and the electrolyte (solid or liquid form).

[0288] Therefore, the heat transfer property of the reinforced partition 2 can be utilized, so that the reinforced partition 2 can also play the role of heat dissipation and temperature equalization for the soft-pack battery cell 1, thereby optimizing the performance and service life of the soft-pack battery cell 1; and, by spacing the reinforced partition 2 between adjacent soft-pack battery cells 1, the heat transfer between the adjacent soft-pack battery cells 1 on both sides of the reinforced partition 2 can be reduced, thereby improving the overall reliability of the battery device 100. In addition, since the thickness T1 of the reinforced partition 2 is less than the thickness T2 of the battery cell group 1X, the arrangement of the reinforced partition 2 does not occupy too much space, thereby facilitating the improvement of the energy density of the battery device 100.

[0289] In some embodiments of the present application, the reinforcing partition 2 covers more than 80% of the total area of ​​all the soft-packed cells 1 in the cell group 1X, for example, 80%, 81%, 82%, 84%, 85%, 90%, 100%, 120%, etc. That is, when an orthographic projection is made along the first direction F1, more than 80% of the orthographic projection of the cell group 1X is covered by the orthographic projection of the reinforcing partition 2.

[0290] Exemplarily, the reinforcing partition 2 sandwiched between two adjacent battery cell groups 1X is an integrated structure. At this time, when the battery cell group 1X includes a plurality of soft-pack battery cells 1 arranged flatly on a plane perpendicular to the first direction F1, the plurality of soft-pack battery cells 1 can be at least partially covered by the same reinforcing partition 2, thereby simplifying processing.

[0291] In the above technical solution, by setting a reinforced partition 2 to cover more than 80% of the total area of ​​all soft-pack batteries 1 in the battery group 1X, a larger heat transfer surface and support surface can be provided between the battery group 1X and the reinforced partition 2, so that the reinforced partition 2 can provide better support, heat transfer and separation effects for the battery group 1X.

[0292] In some embodiments, the reinforcing partition 2 is bonded to the battery cell group 1X. For example, the reinforcing partition 2 can be fixed to the soft-package shell 11 of the adjacent soft-package battery cell 1 by gluing, wherein the gluing method is not limited, for example, gluing can be performed by gluing or double-sided tape.

[0293] Thus, the reinforcing partition 2 is connected to the adjacent battery cell group 1X by bonding, making the connection simple and the fixation reliable, and the reinforcing partition 2 can stably exchange heat with the battery cell group 1X. In addition, the adhesive layer occupies a small space, so that the reinforcing partition 2 and the battery cell group 1X can be arranged compactly, so that the overall structure of the battery cell row 10 is more compact and stable, which is conducive to improving the battery energy density.

[0294] Exemplarily, the reinforcing partition 2 is bonded and fixed to the battery cell group 1X by double-sided adhesive tape. For example, when the battery cell row 10 is assembled, a double-sided adhesive tape may be provided between the battery cell group 1X and the reinforcing partition 2. For example, the double-sided adhesive tape may be first bonded and fixed to one of the battery cell group 1X and the reinforcing partition 2, and then bonded to the other, so that the battery cell group 1X and the reinforcing partition 2 are bonded and fixed by double-sided adhesive tape.

[0295] Therefore, the reinforcing partition 2 is fixed to the adjacent battery cell group 1X by means of double-sided adhesive, which can avoid the problem of colloid overflow, avoid the space occupied by the overflowed glue, and save the subsequent process of cleaning the overflowed glue.

[0296] In some embodiments, a cavity is formed in the reinforcing partition 2. That is, the reinforcing partition 2 is not a solid structure. It is worth noting that the cavity can be filled with a medium or not. When filled with a medium, it can be filled with a buffer medium for absorbing force, or it can be filled with a heat transfer medium for absorbing heat, etc.

[0297] In the above technical solution, by providing a cavity in the reinforcing partition 2, the reinforcing partition 2 can use the cavity to absorb the expansion force of the battery cell group 1X, that is, to provide an expansion space, so as to avoid the problem of excessive squeezing of the battery cell group 1X when the battery cell group 1X expands too much, thereby improving the reliability of the battery cell row 10. Moreover, when the battery cell row 10 is subjected to some collision, the cavity can be used to absorb the collision force to protect the battery cell group 1X.

[0298] In some embodiments, the cavity includes a heat exchange channel for setting a heat exchange medium. That is, some cavities can circulate or store heat exchange medium. At this time, the reinforced partition 2 can use its own material to exchange heat with the battery cell group 1X, or it can use the heat exchange medium in the heat exchange channel to exchange heat with the battery cell group 1X, or it can use the material of the reinforced partition 2 itself and the heat exchange medium in the heat exchange channel to exchange heat with the battery cell group 1X at the same time, so that a flexible design of the reinforced partition 2 can be achieved.

[0299] In the above technical solution, the reinforced partition 2 can use the heat exchange medium in the heat exchange channel to exchange heat with the battery cell group 1X, and the heat management performance of the reinforced partition 2 on the battery cell group 1X can be optimized by selecting and controlling the heat exchange medium. In addition, the heat exchange channel can be connected to an external thermal management system so that the heat exchange medium can circulate and control the temperature. At this time, the reinforced partition 2 can integrate the liquid cooling heat exchange function, reducing 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.

[0300] In some embodiments of the present application, Fig. 22 , a plurality of reinforcing partitions 2 are sandwiched between the plurality of battery cell groups 1X stacked along the first direction F1, and only one reinforcing partition 2 is sandwiched between each two adjacent battery cell groups 1X, and the two reinforcing partitions 2 adjacently arranged along the first direction F1 are connected by a connecting plate 6 located on one side of the battery cell group 1X in the third direction F3. In other words, the connecting plate 6 is located on one side of the battery cell group 1X in the third direction F3, and connects the two reinforcing partitions 2 adjacently arranged along the first direction F1.

[0301] Therefore, by arranging two reinforcing partitions 2 adjacent to each other along the first direction F1 and connecting them through a connecting plate 6 located on one side of the battery cell group 1X in the third direction F3, the reliability of the supporting of the soft-pack battery cell 1 by the reinforcing partition 2 can be improved, and the setting position of the connecting plate 6 does not interfere with the battery cell group 1X, and does not interfere with the flexible bending conductive structure 5 located in the second direction F2.

[0302] The first direction F1 , the second direction F2 and the third direction F3 are perpendicular to each other. For example, the first direction F1 is the thickness direction of the soft-pack battery cell 1 , the second direction F2 is the length direction of the soft-pack battery cell 1 , and the third direction F3 is the width direction of the soft-pack battery cell 1 .

[0303] Among them, each two adjacent reinforced partitions 2 may be connected by a connecting plate 6, or some two adjacent reinforced partitions 2 may be connected by a connecting plate 6, and some two adjacent reinforced partitions 2 may not be connected by a connecting plate 6. Among them, the reinforced partitions 2 and the connecting plate 6 may be assembled and connected, or may be integrally formed.

[0304] For example, in combination Fig. 22 The connecting plate 6 is arranged between the two reinforcing partitions 2 connected thereto. At this time, the connecting plate 6 and the two reinforcing partitions 2 connected thereto form a U-shaped shell.

[0305] In some embodiments, a reinforcing partition 2 is sandwiched between each two adjacent battery cell groups 1X along the first direction F1. Therefore, by setting a reinforcing partition 2 between each two adjacent battery cell groups 1X along the first direction F1, each battery cell group 1X can obtain support and heat exchange from the reinforcing partition 2, thereby more fully optimizing the reliability and performance of the battery cell row 10. Of course, the present application is not limited to this. For example, in other embodiments of the present application, a reinforcing partition 2 may not be set between some of the two adjacent battery cell groups 1X along the first direction F1.

[0306] In some embodiments, reference Fig.21 A buffer 3 is sandwiched between at least two battery cell groups 1X adjacent to each other along the first direction F1 , and the rigidity of the buffer 3 is less than the rigidity of the soft-pack shell 11 .

[0307] Therefore, by setting a buffer 3 between two adjacent battery cell groups 1X, and the rigidity of the buffer 3 is less than the rigidity of the soft-pack shell 11, the buffer 3 can provide expansion space for the battery cell group 1X, so that the buffer 3 can well absorb the expansion deformation of the battery cell group 1X and the vibration under external impact, etc., so that the overall structural stability of the battery device 100 is better.

[0308] The material of the buffer 3 is not limited, for example, it can be a foam layer or a silicone layer, etc. The buffer 3 made of these materials has better absorption capacity, and the weight and cost are relatively low, which is conducive to the lightweight and low-cost design of the battery device 100. Exemplarily, the battery cell group 1X and the buffer 3 can be fixed by bonding, or they can be abutted. For example, they can be fixed by gluing or double-sided adhesive. When double-sided adhesive is used for bonding and fixing, the problem of glue overflow can be avoided.

[0309] In some embodiments, reference Fig.21When a reinforcing partition 2 is sandwiched between at least two battery cell groups 1X adjacent to each other along the first direction F1, and a buffer 3 is sandwiched between at least two battery cell groups 1X adjacent to each other along the first direction F1, multiple reinforcing partitions 2 and multiple buffers 3 can be sandwiched between multiple battery cell groups 1X stacked along the first direction F1, and each battery cell group 1X is sandwiched between the buffer 3 and the reinforcing partition 2. As a result, the arrangement of the reinforcing partition 2 and the buffer 3 is more balanced, and each battery cell group 1X can obtain stable and reliable support, heat exchange and buffering effects.

[0310] Of course, the present application is not limited thereto, for example, a buffer 3 may be sandwiched between each two adjacent battery cell groups 1X along the first direction F1. For another example, a reinforcing partition 2 and a buffer 3 may be sandwiched between two adjacent battery cell groups 1X.

[0311] In some embodiments, the buffer 3 covers more than 80% of the total area of ​​all soft-pack batteries 1 in the battery group 1X, such as 80%, 81%, 82%, 84%, 85%, 90%, 100%, 120%, etc. In other words, when an orthographic projection is made along the first direction F1, more than 80% of the orthographic projection of the battery group 1X is covered by the orthographic projection of the buffer 3.

[0312] Exemplarily, the buffer member 3 sandwiched between two adjacent battery cell groups 1X is an integrated structure. At this time, when the battery cell group 1X includes a plurality of soft-pack battery cells 1 arranged flatly on a plane perpendicular to the first direction F1, the plurality of soft-pack battery cells 1 can be at least partially covered by the same buffer member 3, thereby simplifying processing.

[0313] In the above technical solution, by setting the buffer member 3 to cover more than 80% of the total area of ​​all the soft-pack batteries 1 in the battery group 1X, the battery group 1X and the buffer member 3 can form a larger buffer matching area, thereby improving the buffering effect of the buffer member 3 on the battery group 1X, so that the battery group 1X can be buffered to a greater extent, thereby improving the reliability of the battery group 1X.

[0314] In some embodiments, reference Fig.23 and Fig.24 The soft-pack shell 11 includes two membrane portions 111 arranged and connected along the thickness direction of the soft-pack battery cell 1. The two membrane portions 111 define a receiving groove. The receiving grooves of the two membrane portions 111 are open in directions facing each other along the thickness direction of the soft-pack battery cell 1, and together constitute a receiving cavity of the soft-pack shell 11. The electrode assembly is arranged in the receiving cavity. The wall thickness of the membrane portion 111 is less than or equal to 0.2 mm.

[0315] In this embodiment, the wall thickness of the membrane portion 111 is less than or equal to 0.2 mm, for example, the wall thickness of the membrane portion 111 may 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 membrane portion 111 to be less than or equal to 0.2 mm, the volume proportion of the soft-pack shell 11 in the soft-pack battery cell 1 is smaller and the mass is lighter, and the volume and mass proportion of the electrode assembly in the soft-pack battery cell 1 is larger, so that the energy density of the soft-pack battery cell 1 can be greatly improved.

[0316] Exemplarily, the electrode assembly is composed of a positive electrode sheet, a negative electrode sheet and a separator, and the soft-pack battery cell 1 mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. The positive electrode sheet 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.

[0317] Exemplarily, the soft-pack shell 11 can be an aluminum-plastic film, and the two film portions 111 of the soft-pack shell 11 connected in the thickness direction of the soft-pack battery 1 can be processed and formed by punching the aluminum-plastic film substrate, and the two film portions 111 both define a receiving groove, so the soft-pack shell 11 can be processed and formed by double punching. Exemplarily, during the production and processing of the soft-pack battery 1, the soft-pack shell 11 can form two film portions 111 with receiving grooves by double punching, and the electrode assembly is arranged in the receiving groove of one of the film portions 111, and the other film portion 111 is folded toward the film portion 111 that receives the electrode assembly, so that the two receiving grooves cooperate to form a receiving cavity, and the soft-pack battery 1 then undergoes subsequent production processes such as edge sealing and liquid injection, and the two film portions 111 form a closed receiving cavity by edge sealing, thereby forming a complete soft-pack shell 11.

[0318] In some embodiments, in combination Fig.23 and Fig.24 , the dimension of the soft-pack battery cell 1 in the thickness direction of the soft-pack battery cell 1 is a first dimension H1, and the dimension of any membrane portion 111 in the thickness direction of the soft-pack battery cell 1 is a second dimension H2, wherein, since the soft-pack battery cell 1 is composed of two membrane portions 111 to form a soft-pack shell 11, the overall dimension of the two membrane portions 111 in the thickness direction of the soft-pack battery cell 1 is the first dimension H1, and therefore the sum of the second dimensions H2 of the two membrane portions 111 is equal to the first dimension H1, and the second dimensions H2 of the two membrane portions 111 can be set to be the same or different as needed.

[0319] In some embodiments, the first dimension H1 is greater than or equal to 5 mm and less than or equal to 70 mm, for example, 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, etc. 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, for example, 0.6, 0.55, 0.5, 0.48, 0.46, 0.45, 0.4, etc.

[0320] Among them, 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 soft-pack battery cell 1 is thicker, so that with the thinner soft-pack shell 11, the soft-pack battery cell 1 can have a higher energy density, and the thickness of the soft-pack battery cell 1 can be flexibly set within a larger range as needed, so that the soft-pack battery cell 1 can better meet the use needs of battery devices 100 of different sizes.

[0321] Among them, the ratio of the second size H2 to the first size H1 is set to be greater than or equal to 0.4 and less than or equal to 0.6, so that the sizes of the two membrane portions 111 in the first direction F1 can be relatively consistent, so that the two membrane portions 111 can maintain sufficient mechanical strength to meet the molding requirements of the soft-pack shell 11, so that when the first size H1 of the soft-pack battery cell 1 of this embodiment is set to be greater than or equal to 5 mm and less than or equal to 70 mm, a stable and reliable soft-pack shell 11 is formed.

[0322] In this embodiment, by setting the thickness of the soft-pack shell 11 to be less than 0.2 mm, the ratio of the second dimension H2 to the first dimension H1 of any membrane 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 a plurality of thinner soft-pack battery cells 1, the number of arranged soft-pack battery cells 1 in this embodiment is smaller, thereby reducing the proportion of the soft-pack shell 11, and further allowing a plurality of soft-pack battery cells 1 in the same volume to have a greater energy density. In addition, the number of structural components such as the reinforcing partition 2 and the buffer 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 greatly improving the overall energy density of the battery device 100.

[0323] When the soft-pack battery cells 1 in the present embodiment are assembled and arranged in the battery device 100, within the same arrangement space, the battery device 100 can arrange fewer soft-pack battery cells 1 and obtain a higher energy density. Moreover, due to the reduction in the number of soft-wave battery cells, the number of supporting structures for supporting the soft-pack battery cells 1 and structural components such as heat conduction and bonding and fixing is also greatly reduced, so that there can be more space in the battery device 100 to arrange the soft-pack battery cells 1, thereby greatly improving the overall energy density of the battery device 100.

[0324] Exemplarily, the ratio of the second dimension H2 to the first dimension H1 may 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. The dimensions of the two membrane portions 111 in the first direction F1 are made more consistent, which is convenient for processing and manufacturing, and the receiving grooves of the two membrane portions 111 can have sufficient depth for the arrangement of the electrode assembly, and the two membrane portions 111 maintain a relatively consistent mechanical strength, so that the overall structure of the soft-pack shell 11 is more stable and reliable, so that the soft-pack battery cell 1 can work and use stably and reliably.

[0325] Exemplarily, the ratio of the second dimension H2 to the first dimension H1 may be 0.5. That is, the two membrane portions 111 have the same dimension in the first direction F1, the two membrane portions 111 may form a symmetrical structure, and the dimensions of the receiving grooves of the two membrane 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 membrane portions 111 may have the same structural configuration, thereby making the processing and forming of the soft-pack shell 11 more convenient, and the two membrane portions 111 may have consistent mechanical strength and structural performance, thereby making the overall structural stability and reliability of the soft-pack shell 11 better, and making the soft-pack battery cell 1 more stable.

[0326] 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.

[0327] 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.

[0328] 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.

[0329] 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.

[0330] 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.

[0331] 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 respectively have an edge sealing structure 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. Moreover, 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.

[0332] In some embodiments, in combination with FIG. 19, Figure 25-27The battery device 100 includes a battery cell row 10, and the battery cell row 10 includes a plurality of battery cell groups 1X stacked along a first direction F1. The battery device 100 includes a box 20 for loading the battery cell row 10. One of the length direction and the width direction of the box 20 is the first direction F1, and the other is the second direction F2. The thickness direction of the soft-pack battery cell 1 is the first direction F1, and the second direction F2 is the length direction of the soft-pack battery cell 1. The width direction of the soft-pack battery cell 1 is consistent with the height direction of the box 20 (for example, the third direction F3 shown in the figure). The box 20 includes a cover plate 71 arranged on both sides of the battery cell row 10 along the height direction of the box 20. Therefore, placing each soft-pack battery cell 1 as above can improve the uniformity of the force on each soft-pack battery cell 1, which is beneficial to the heat dissipation of each soft-pack battery cell 1.

[0333] Exemplarily, at least one cover plate 71 is in heat exchange with the battery cell row 10. Thus, by placing the soft-pack battery cells 1 as above, each soft-pack battery cell 1 can effectively exchange heat with the cover plate 71, thereby improving the consistency and uniformity of the temperature regulation of each soft-pack battery cell 1 by the cover plate 71, thereby improving the working stability and reliability of the battery cell row 10, and further improving the performance of the battery device 100. Among them, the heat exchange between the cover plate 71 and the battery cell row 10 can be direct or indirect.

[0334] In some embodiments, the width direction of the soft-pack battery cell 1 is consistent with the height direction of the box body 20, and a structural adhesive is filled between the battery cell row 10 and the cover plate 71. Thus, the rigidity of the soft-pack battery cell 1 along the height direction of the box body 20 can be improved. Exemplarily, the structural adhesive is a thermally conductive adhesive, which can transfer heat between the cover plate 71 and the battery cell row 10, thereby facilitating the heat dissipation of the soft-pack battery cell 1.

[0335] In some embodiments, reference Fig.28 A rubber strip 9 is provided in the box body 20, and 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 soft-pack battery cells 1 arranged along the first direction F1, and the rubber strip 9 is located between the fitting gap and the bottom plate 711.

[0336] In the above technical solution, the rubber blocking strip 9 is set to prevent the structural glue from overflowing between adjacent soft-pack battery cells, reducing the probability of adjacent soft-pack battery cells forming a hard structure due to overflowing glue, 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.

[0337] Exemplarily, the rubber barrier strip 9 can avoid being directly below the bottom of the soft-pack battery cell 1 , so that a heat conduction area can be formed between directly below the soft-pack battery cell 1 and the bottom plate 711 .

[0338] In some embodiments, two adjacent soft-pack battery cells 1 share a rubber strip 9 .

[0339] In the above technical solution, two adjacent soft-pack battery cells 1 share one rubber stopper strip 9 , thereby reducing the number of rubber stopper strips 9 , which is beneficial to improving assembly efficiency.

[0340] In some embodiments, the rubber strip 9 is a rubber foam, and the rubber strip 9 is bonded to the bottom plate 711 ; or, the rubber strip 9 is a rubber strip with adhesive on one side, and the rubber strip 9 is bonded to the bottom of the soft-pack battery cell 1 .

[0341] In the above technical solution, the adhesive blocking foam has good compressibility. By squeezing the adhesive blocking strip 9 through the soft-pack battery cell 1, the structural adhesive can be better prevented from overflowing between adjacent soft-pack battery cells, and the adhesive blocking strip 9 is bonded to the bottom plate 711, which facilitates the installation and fixation of the adhesive blocking strip 9; or, by setting the adhesive blocking strip 9 as a single-sided adhesive strip, it is convenient to bond the adhesive blocking strip 9 to the bottom of the soft-pack battery cell 1, so that the adhesive blocking strip 9 and the soft-pack battery cell 1 are fixed as a whole, thereby facilitating the improvement of the overall assembly efficiency of the battery device 100.

[0342] In some embodiments, the battery device 100 further includes: a heat exchange plate 30, which is disposed between the battery cell row 10 and at least one cover plate 71. Thus, the battery cell row 10 can exchange heat with the heat exchange plate 30. When the battery device 100 is working, the heat generated by each soft-pack battery cell 1 in the battery cell row 10 is dissipated through the heat exchange plate 30. When the battery cell row 10 needs to be heated, the heat exchange plate 30 can transfer the heat to each soft-pack battery cell 1 in the battery cell row 10.

[0343] Therefore, by providing the heat exchange plate 30, the temperature regulation effect on the battery cell row 10 can be optimized through the design of the heat exchange plate 30. For example, the heat exchange plate 30 can be made of a material with good heat transfer properties, and a heat exchange medium can be circulated in the heat exchange plate 30 to optimize the temperature regulation effect of the heat exchange plate 30 on the battery cell row 10.

[0344] For example, in conjunction with FIG. 19, Figure 25-27 The box body 20 includes a top plate 712 and a bottom plate 711 arranged on the upper and lower sides of the battery cell row 10 along the height direction of the box body 20. The heat exchange plate 30 can be a liquid cooling plate. The heat exchange plate 30 is arranged between the battery cell row 10 and the bottom plate 711. When the battery device 100 is working, the heat generated by the multiple soft-pack battery cells 1 in the battery cell row 10 during operation is dissipated through the heat exchange plate 30. When the battery cell row 10 needs to be heated, the heat exchange plate 30 can transfer the heat to the soft-pack battery cells 1 in the battery cell row 10.

[0345] Of course, the present application is not limited thereto, for example, the heat exchange plate 30 may be arranged between the battery cell row 10 and the top plate 712. Alternatively, the heat exchange plate 30 may be arranged between the battery cell row 10 and the top plate 712, and also between the battery cell row 10 and the bottom plate 711.

[0346] It is worth noting that when the heat exchange plate 30 is arranged between the battery cell row 10 and the cover plate 71, the space between the battery cell row 10 and the cover plate 71 may be filled with structural adhesive or not. When the structural adhesive is filled, the structural adhesive may be filled both between the cover plate 71 and the heat exchange plate 30 and between the heat exchange plate 30 and the battery cell row 10, thereby improving the installation stability of the heat exchange plate 30. When the structural adhesive is a thermally conductive adhesive, the heat exchange performance between the heat exchange plate 30 and the battery cell row 10, as well as the heat exchange performance between the cover plate 71 and the heat exchange plate 30 can be improved.

[0347] In some embodiments of the present application, the soft-pack battery cell 1 is any one of a lithium iron phosphate battery cell, a ternary battery cell, and a solid-state battery cell.

[0348] The solid-state battery cell may be, but is not limited to, a polymer solid-state battery cell, an oxide solid-state battery cell, a sulfide solid-state battery cell, a halide solid-state battery cell, etc. The solid-state battery cell may also be a semi-solid-state battery cell or a fully solid-state battery cell.

[0349] In the above technical solution, the soft-pack battery cell 1 adopts the above types to provide more options 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 cell, 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 cell, which has the advantages of high energy density and good electrochemical performance; the soft-pack battery cell 1 is a solid-state battery cell, which has the advantages of high energy density and high reliability, light weight, and good high and low temperature performance.

[0350] In some embodiments of the present application, the soft-pack battery cell 1 is a lithium iron phosphate battery cell, and in the positive electrode material of the soft-pack battery cell 1, the usage 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 cell, and in the positive electrode material of the soft-pack battery cell 1, the usage ratio of the positive electrode active material, the binder, and the conductive agent is 96: (2-3): (1-2).

[0351] Exemplarily, the soft-pack battery cell 1 is a lithium iron phosphate battery cell, 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.

[0352] Exemplarily, the soft-pack battery cell 1 is a ternary battery cell, 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 octa-series LiNi0.8Co0.1Mn0.1O2, and the ratio is preferably 96:2.5:1.5.

[0353] In some embodiments, the positive electrode of the soft-pack battery cell 1 may be a positive electrode sheet, which may include a positive electrode collector and a positive electrode film layer disposed on at least one surface of the positive electrode collector, wherein the positive electrode film layer includes a positive electrode active material.

[0354] As an example, the positive electrode current collector has two surfaces opposite to each other in its thickness direction, and the positive electrode film layer is disposed on any one or both of the two opposite surfaces of the positive electrode current collector.

[0355] As an example, the positive electrode current collector may be a metal foil or a composite current collector. For example, as the metal foil, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel, titanium, silver surface treated aluminum or stainless steel, etc. may be used. The composite current collector may include a polymer material base layer and a metal layer. The composite current collector may be formed by forming a metal material (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.).

[0356] As an example, when the soft-pack battery cell 1 of the embodiment of the present application is a lithium-ion battery, the positive electrode active material may include at least one of the following materials: phosphate, layered transition metal oxide and their respective modified compounds; optionally, the positive electrode active material may include layered transition metal oxide and their respective modified compounds, which is beneficial to improve the energy density of the soft-pack battery cell 1. However, the present application is not limited to these materials, and other traditional materials that can be used as battery positive electrode film layers can also be used. These positive electrode active materials can be used alone or in combination of two or more.

[0357] Examples of phosphates may include, but are not limited to, at least one of lithium iron phosphate (such as LiFePO4 (also referred to as LFP)), a composite material of lithium iron phosphate and carbon, lithium manganese phosphate (such as LiMnPO4), a composite material of lithium manganese phosphate and carbon, lithium iron manganese phosphate, and a composite material of lithium iron manganese phosphate and carbon.

[0358] Layered transition metal oxides include those of the general formula Li a Ni b Co c M d O e A f At least one of the compounds and modified compounds thereof. 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, further optionally, 0.75≤b≤0.98.

[0359] Examples of layered transition metal oxides may include, but are not limited to, lithium cobalt oxide (e.g., LiCoO2), lithium nickel oxide (e.g., LiNiO2), lithium manganese oxide (e.g., LiMnO2, LiMn2O4), lithium nickel cobalt oxide, lithium manganese cobalt oxide, lithium nickel manganese oxide, lithium nickel cobalt manganese oxide (e.g., LiNi 1 / 3 Co 1 / 3 Mn 1 / 3 O2 (also referred to as NCM 333 )、LiNi 0.5 Co 0.2 Mn 0.3 O2 (also referred to as NCM 523 )、LiNi 0.5 Co 0.25 Mn 0.25 O2 (also referred to as NCM 211 )、LiNi 0.6 Co 0.2 Mn 0.2 O2 (also referred to as NCM 622 )、LiNi 0.8 Co 0.1 Mn 0.1 O2 (also referred to as NCM 811 )、LiNi 0.9 Co 0.05 Mn 0.05 O2 (also referred to as Ni90), lithium nickel cobalt aluminum oxide (such as LiNi 0.80 Co 0.15 Al 0.05 O2) and its modified compounds, etc.

[0360] When the soft-pack battery cell 1 of the embodiment of the present application 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 materials.

[0361] As an example, the positive electrode active material for sodium ion batteries may include NaFeO2, NaCoO2, NaCrO2, NaMnO2, NaNiO2, NaNi 1 / 2 Ti 1 / 2 O2、NaNi 1 / 2 Mn 1 / 2 O2、Na 2 / 3 Fe 1 / 3 Mn 2 / 3 O2、NaNi 1 / 3 Co 1 / 3 Mn 1 / 3O2, NaFePO4, NaMnPO4, NaCoPO4, Prussian blue materials, general formula X p M' q (PO4) r O x Y 3-x In the general formula X p M' q (PO4) 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.

[0362] In the embodiments of the present application, the modified compounds of the above-mentioned positive electrode active materials can be doping modification and / or surface coating modification of the positive electrode active materials, such as carbon coating modification, fast ion conductor coating modification, etc.

[0363] The soft-pack battery cell 1 is accompanied by the deintercalation and consumption of active ions such as Li during the charge and discharge process, and the molar content of Li in the soft-pack battery cell 1 is different when it is discharged to different states. In the examples of the positive electrode active materials in the present application, the molar content of Li is the initial state of the material, that is, the state before feeding. The positive electrode active material is used in the battery system, and the molar content of Li may change after charge and discharge cycles.

[0364] In the examples of the present application regarding the positive electrode active materials, the molar content of oxygen O is only a theoretical value. The release of oxygen from the lattice will cause the molar content of oxygen O to change. In reality, the molar content of oxygen O will fluctuate.

[0365] In the embodiments of the present application, the content of the elements in the positive electrode active material is a well-known meaning in the art, and can be detected by equipment and methods well-known in the art, for example, with reference to EPA 6010D-2014, tested by inductively coupled plasma atomic emission spectrometry, and measured by plasma atomic emission (ICP-OES, instrument model: Thermo ICAP7400). First, weigh 0.4 g of the positive electrode active material and add 10 ml (50% concentration) of aqua regia thereto. Then place it on a plate at 180 ° C for 30 minutes. After digestion on the plate, dilute to a volume of 100 mL, and use the standard curve method for quantitative testing.

[0366] In some embodiments, the positive electrode may be a foamed metal. The foamed metal may be a nickel foam, a copper foam, an aluminum foam, an alloy foam, or a carbon foam. When the foamed metal is used as the positive electrode, the positive electrode film layer may not be provided on the surface of the foamed metal, but of course, a positive electrode film layer may also be provided. As an example, a lithium source material, potassium metal or sodium metal may also be filled or / and deposited in the foamed metal, and the lithium source material is lithium metal and / or a lithium-rich material.

[0367] In some embodiments, the positive electrode film layer may further optionally include a positive electrode conductive agent. The present application embodiment has no particular restrictions on 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 of the positive electrode conductive agent in the positive electrode film layer is ≤5wt%.

[0368] In some embodiments, the positive electrode film layer may also optionally include a positive electrode binder. The embodiment of the present application has no particular restrictions on the type of 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 fluorine-containing acrylic resin. In some embodiments, the mass percentage of the positive electrode binder in the positive electrode film layer is ≤5wt%.

[0369] The positive electrode film layer is usually formed by coating the positive electrode slurry on the positive electrode current collector, drying and cold pressing. The positive electrode slurry is usually formed by dispersing the positive electrode active material, optional conductive agent, optional binder and any other components in a solvent and stirring them evenly. The solvent can be N-methylpyrrolidone (NMP), but is not limited thereto.

[0370] In some embodiments, the negative electrode may be a negative electrode plate, which may include a negative electrode current collector and a negative electrode film layer disposed on at least one surface of the negative electrode current collector, wherein the negative electrode film layer includes a negative electrode active material.

[0371] As an example, the negative electrode current collector has two surfaces opposite to each other in its thickness direction, and the negative electrode film layer is disposed on any one or both of the two opposite surfaces of the negative electrode current collector.

[0372] As an example, the negative electrode current collector may be a metal foil, a foamed metal or a composite current collector. For example, as the metal foil, aluminum or stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel or titanium with silver surface treatment may be used. The foamed metal may be foamed nickel, foamed copper, foamed aluminum, foamed alloy, or foamed carbon. The composite current collector may include a polymer material base and a metal layer. The composite current collector may be formed by forming a metal material (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.).

[0373] As an example, the negative electrode active material may adopt the negative electrode active material for soft-pack batteries known in the art. As an example, the negative electrode active material may include at least one of the following materials: carbon material (for example, the carbon material includes at least one of artificial graphite, natural graphite, soft carbon, and hard carbon), silicon-based material, tin-based material, and lithium titanate, etc. The silicon-based material may include at least one of elemental silicon, silicon oxide compounds, silicon-carbon composites, silicon-nitrogen composites, and silicon alloys. The tin-based material may include at least one of elemental tin, tin oxide compounds, and tin alloys. However, the present application is not limited to these materials, and other traditional materials that can be used as negative electrode film layers of batteries may also be used. These negative electrode film layers may be used alone or in combination of two or more.

[0374] In some embodiments, the negative electrode active material includes silicon, which may be present in the form of a silicon-based material, for example, the silicon-based material may include at least one of elemental silicon, silicon-oxygen compounds, silicon-carbon compounds, silicon-nitrogen compounds, and silicon alloys. The introduction of silicon can improve the energy density of the soft-pack battery cell.

[0375] In some embodiments, the mass content of silicon in the negative electrode film layer is 1wt% to 32wt%, optionally 2wt% to 19wt%, and further optionally 6wt% to 13wt%. In the soft-pack battery 1 system, when the mass content of silicon is within the above range, the energy density of the soft-pack battery 1 can be improved.

[0376] In the embodiments of the present application, the mass content of silicon in the negative electrode film layer has a meaning well known in the art and can be detected by using equipment and methods well known in the art. For example, the negative electrode plate is immersed in a solvent such as water, the negative electrode active material is separated from the negative electrode current collector, and the negative electrode active material is obtained by filtration. The negative electrode active material is measured using an ICAP7400 inductively coupled plasma-emission spectrometer of ThermoFisher Scientific, USA, and with reference to GB / T30902-2014 standard to obtain the silicon content.

[0377] In some embodiments, the negative electrode film layer may further optionally include a negative electrode conductive agent. The embodiment of the present application has no particular restrictions on the type of the negative electrode conductive agent. 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 of the negative electrode conductive agent in the negative electrode film layer is ≤5wt%.

[0378] In some embodiments, the negative electrode film layer may also optionally include a negative electrode binder. The embodiment of the present application has no particular restrictions on the type of negative electrode binder. 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 (e.g., 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 of the negative electrode binder in the negative electrode film layer is ≤5%.

[0379] In some embodiments, the negative electrode film layer may further 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 of the other additives in the negative electrode film layer is ≤ 2wt%.

[0380] In some embodiments, the material of the positive electrode current collector may be aluminum, and the material of the negative electrode current collector may be copper.

[0381] In some embodiments, the separator includes a separator. The present application has no particular limitation on the type of separator, and any known separator with a porous structure having good chemical stability and mechanical stability can be selected.

[0382] The embodiments of the present application have no particular restrictions on the type of isolation membrane, and any known porous structure isolation membrane with good chemical stability and mechanical stability can be selected.

[0383] In some embodiments, the material of the isolation membrane may include one or more of glass fiber, non-woven fabric, polyethylene, polypropylene and polyvinylidene fluoride. The isolation membrane may be a single-layer film or a multi-layer composite film, without particular limitation. When the isolation membrane is a multi-layer composite film, the materials of each layer may be the same or different, without particular limitation.

[0384] In some embodiments, the isolation membrane may include a porous base membrane and a coating layer disposed on at least one side of the porous base membrane, and the coating layer may include at least one of inorganic particles or organic particles.

[0385] The porous base membrane may include one or more of polyethylene and polypropylene.

[0386] The inorganic particles have good heat resistance and can improve the heat resistance of the separator as a whole. The inorganic particles will not undergo oxidation and reduction reactions with metal dendrites within the operating 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.

[0387] In some embodiments, the inorganic particles include one or more of boehmite γ-AlOOH, aluminum oxide Al2O3, aluminum hydroxide Al(OH)3, barium sulfate BaSO4, magnesium oxide MgO, magnesium hydroxide Mg(OH)2, calcium oxide CaO, cerium oxide CeO2, zirconium titanate SrTiO3, barium titanate BaTiO3, and magnesium fluoride MgF2.

[0388] In some embodiments, the organic particles include at least one of polystyrene, polyethylene, polyimide, melamine resin, phenolic resin, polypropylene, polyester (e.g., polyethylene terephthalate, polyethylene naphthalate, polybutylene terephthalate), polyphenylene sulfide, polyaramid, polyamideimide, polyimide, copolymer of butyl acrylate and ethyl methacrylate, and mixtures thereof.

[0389] In some embodiments, the soft-pack battery cell 1 further includes an electrolyte.

[0390] During the charge and discharge process of the battery cell, active ions are embedded and released back and forth between the positive electrode and the negative electrode, and the electrolyte plays a role in conducting active ions between the positive electrode and the negative electrode. The present application embodiment has no particular limitation on the type of electrolyte, which can be selected according to actual needs.

[0391] The electrolyte solution includes electrolyte salt and solvent. The types of electrolyte salt and solvent are not specifically limited and can be selected according to actual needs.

[0392] In some embodiments, the electrolyte may also optionally include additives. For example, the additives may include negative electrode film-forming additives, positive electrode film-forming additives, and additives that can improve certain battery properties, such as additives that improve battery overcharge performance, additives that improve battery high temperature performance, and additives that improve battery low temperature power performance.

[0393] 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 carboxylate compound.

[0394] It can be understood that when the soft-pack battery cell 1 is a lithium iron phosphate battery cell, in the positive electrode material of the soft-pack battery cell 1, the positive electrode active material accounts for 96 parts of the total weight of the positive electrode material, the binder accounts for 1 to 3 parts of the total weight of the positive electrode material (for example, it may 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 of the total weight of the positive electrode material (for example, it may include but is not limited to 1, 1.2, 1.5, 1.8, 2, 2.2, 2.5, 2.8, 3, etc.).

[0395] For example, when the soft-pack battery cell 1 is a lithium iron phosphate battery cell, the positive electrode active material is LFP (which may refer to LiFePO4, i.e., lithium iron phosphate), the binder may be PVDF (polyvinylidene fluoride), and the conductive agent may be conductive carbon black, wherein LFP:PVDF:conductive carbon black may be 96:2:2, that is, the total weight of the positive electrode active material is 100 parts, LFP accounts for 96 parts, PVDF accounts for 2 parts, and conductive carbon black also accounts for 2 parts. The weight unit of the positive electrode active material may be grams.

[0396] When the soft-pack battery cell 1 is a ternary battery cell, in the positive electrode material of the soft-pack battery cell 1, the positive electrode active material accounts for 96 parts of the total weight of the positive electrode material, the binder accounts for 2-3 parts of the total weight of the positive electrode material (for example, including but not limited to 2, 2.2, 2.5, 2.8, 3, etc.), and the conductive agent accounts for 1-2 parts of the total weight of the positive electrode material (for example, including but not limited to 1, 1.2, 1.5, 1.8, 2, etc.). Among them, the ternary battery cell can be but not limited to nickel cobalt manganese lithium oxide system, nickel cobalt aluminum lithium oxide system, etc.

[0397] For example, the ternary material of the ternary battery cell can be eight series LiNi 0.8 Co 0.1 Mn 0.1 O2, the weight ratio of the positive electrode active material, binder and conductive agent is 96:2.5:1.5, that is, the total weight of the positive electrode material is divided into 100 parts, eight series LiNi 0.8 Co 0.1 Mn 0.1 O2 accounts for 96 parts, the binder accounts for 2.5 parts, and the conductive agent accounts for 1.5 parts.

[0398] In the above technical solution, when the soft-pack battery cell 1 is a lithium iron phosphate battery cell, a high proportion of positive electrode active material means that more substances capable of electrochemical reactions can be accommodated in a limited electrode assembly, which is beneficial to increasing the capacity and energy density of the battery device 100, so that the lithium iron phosphate battery cell can output a higher amount of electricity in a relatively small volume and weight, meeting the application scenario with certain requirements for energy density. The amount of the binder and the conductive agent used in the above range 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 cell, since the structure and surface properties of the ternary material itself are relatively complex, the use of the positive electrode active material, binder, and conductive agent in the above-mentioned dosage ratio is beneficial to ensure good bonding 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, and reducing the risk of active material shedding and electrode pulverization during charging and discharging, and extending the cycle life of the battery device 100.

[0399] In some embodiments of the present application, the polarities of the two electrode terminals 12 constituting the connection are the same or opposite, so that multiple battery cell groups 1X are connected in series and / or in parallel. Thus, series connection and / or parallel connection can be achieved as needed, so that the battery device 100 can be flexibly set. For example, the two electrode terminals 12 constituting the connection can both be positive electrodes, so that by connecting the electrode terminals 12 with the same polarity, the parallel connection between the soft-pack battery cells 1 can be achieved; for another example, one of the two electrode terminals 12 constituting the connection is a positive electrode and the other is a negative electrode, so that by connecting the electrode terminals 12 with opposite polarities, the series connection between the soft-pack battery cells 1 can be achieved.

[0400] In some embodiments of the present application, all the soft-pack cells 1 in the battery device 100 are connected in series and / or in parallel to form a cell module 101 (for example, Figure 3 As shown), the battery cell module 101 outputs a positive connection terminal and a negative connection terminal.

[0401] In a second aspect, an embodiment of the present application further provides an electrical device, comprising a battery device 100 according to any of the above solutions.

[0402] In the above technical solution, since the grouping efficiency of the battery device 100 can be improved, it is helpful to reduce the manufacturing cost of the electrical device.

[0403] In a third aspect, the present application also provides a method for processing a battery device 100, wherein the battery device 100 includes a plurality of soft-pack battery cells 1, and electrode terminals 12 are respectively extended from both ends of the soft-pack battery cells 1. Fig.29The processing method includes: step S1, connecting multiple soft-pack battery cells 1 along the extension direction of the electrode terminal 12 into a battery cell string, dividing the battery cell string into multiple battery cell groups 1X arranged in sequence along the arrangement direction of the multiple soft-pack battery cells, each battery cell group 1X includes at least one soft-pack battery cell 1, and every two adjacent soft-pack battery cells 1 in the battery cell string are connected through adjacent electrode terminals 12 to form a conductive structure 4; step S2, bending the two conductive structures 4 at both ends of each battery cell group 1X in opposite directions, so that the two battery cell groups 1X connected to the battery cell group 1X are stacked on both sides of the battery cell group 1X in the thickness direction.

[0404] The extending direction of the electrode terminal 12 is perpendicular to the thickness direction of the soft-pack battery cell 1. For example, the extending direction of the electrode terminal 12 is set as the second direction F2, the second direction F2 is perpendicular to the thickness direction of the soft-pack battery cell 1, and the thickness direction of the soft-pack battery cell 1 is the first direction F1. Exemplarily, the second direction F2 may be the length direction of the soft-pack battery cell 1, but is not limited thereto. For example, the second direction F2 may also be the width direction of the soft-pack battery cell 1.

[0405] Thus, through the above method, a plurality of battery cell groups 1X stacked along the first direction F1 can be obtained, wherein each battery cell group 1X located between the two ends of the first direction F1 is electrically connected to the battery cell group 1X upstream along the first direction F1 at one end along the second direction F2 through the flexible bending conductive structure 5, and is electrically connected to the battery cell group 1X downstream along the first direction F1 at the other end along the second direction F2 through the flexible bending conductive structure 5. In the above technical solution, the grouping efficiency of the battery cell row 10 is high, and the processing efficiency of the battery device 100 is high, so that the manufacturing cost of the battery device 100 can be reduced.

[0406] Among them, since "a plurality of soft-packed cells 1 are connected into a cell string along the extending direction of the electrode terminal 12", a soft-packed cell 1 in the cell string is located on one side of the extending electrode terminal 12 of the adjacent soft-packed cell 1, so that the electrode terminal 12 can be located between two adjacent soft-packed cells 1. It is worth noting that a plurality of soft-packed cells 1 in a cell string are not limited to being arranged in a flat manner, that is, the surface of one side of each soft-packed cell 1 in the thickness direction does not need to be arranged in the same plane, that is, they can be arranged in the same plane or in a non-coplanar manner.

[0407] The two electrode terminals 12 connected together may be directly connected or indirectly connected.

[0408] The specific features of the battery device 100 described in the third aspect may refer to the description of the battery device 100 in the first aspect, and will not be repeated here.

[0409] In some embodiments of the present application, Fig.30In step S1, the plurality of soft-packed cells 1 are connected into a string along the extension direction of the electrode terminal 12. The cell string may specifically include: step S11, laying the plurality of soft-packed cells 1 into a row along the extension direction of the electrode terminal 12 (for example Figure 8 As shown); Step S12, connecting the electrode terminals 12 at adjacent positions of each two adjacent soft-packed battery cells 1. In the above technical solution, each two adjacent soft-packed battery cells 1 in a plurality of soft-packed battery cells 1 laid out in a row can be connected at the same time, thereby improving the processing efficiency. Among them, "laying out" means: the one side surface of each soft-packed battery cell 1 laid out in a row in the thickness direction is arranged in the same plane.

[0410] Of course, the present application is not limited thereto. For example, in other embodiments of the present application, two soft-packed battery cells 1 may be first connected together through the electrode terminals 12, and then the next soft-packed battery cell 1 may be connected, so as to obtain a battery cell string. Alternatively, multiple battery cell groups 1X may be first connected into units, and then multiple units may be connected to obtain a battery cell string.

[0411] In some embodiments of the present application, Fig.31 In step S1, connecting a plurality of soft-packed cells 1 into a cell string along the extension direction of the electrode terminals 12 may specifically include: step S121, overlapping and welding the electrode terminals 12 at adjacent positions of each two adjacent soft-packed cells 1. Thus, by overlapping and welding the electrode terminals 12 adjacent to each other of two adjacent soft-packed cells 1, direct welding connection of two adjacent soft-packed cells 1 can be achieved, thereby further improving processing efficiency, and the conductivity between the overlapped and welded electrode terminals 12 is reliable, which not only saves the introduction of conductive parts, but also improves the stability and reliability of power supply.

[0412] For example, the above step S12, connecting the electrode terminals 12 at adjacent positions of each two adjacent soft-pack battery cells 1, may specifically be: step S121, overlapping and welding the electrode terminals 12 at adjacent positions of each two adjacent soft-pack battery cells 1.

[0413] Of course, the present application is not limited thereto. For example, the two electrode terminals 12 connected together may also be connected via a flexible conductive sheet, or overlapped and bonded, and so on.

[0414] In summary, according to a battery device 100 of a specific embodiment of the present application, the soft-pack battery cell 1 is set to a structural form in which the electrode terminals 12 extend out from both ends of the length, and the electrode terminals 12 of two adjacent soft-pack battery cells 1 are directly welded together, and the multiple soft-pack battery cells 1 are connected into a row arranged along the second direction F2, and the multiple soft-pack battery cells 1 are grouped, that is, one or multiple adjacent soft-pack battery cells 1 are divided into a battery cell group 1X, and the multiple battery cell groups 1X are arranged in sequence along the second direction F2, and then folded after grouping, that is, the flexibility of the electrode terminals 12 at the direct welding connection position of the electrode terminals 12 is utilized to bend the welding positions at both ends of each group along the second direction F2, so as to obtain multiple battery cell groups 1X connected end to end and stacked along the first direction F1, so that the multiple battery cell groups 1X stacked in this way constitute a battery cell row 10, and then the grouped battery cell row 10 can be loaded into the box body 20 as a whole, thereby effectively improving the production efficiency of the battery device 100.

[0415] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0416] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery device, characterized in that: include: A plurality of battery cell groups, wherein the plurality of battery cell groups are stacked along a first direction, and each of the battery cell groups includes at least one soft-pack battery cell; Each of the battery cell groups located between the two ends of the first direction has one end in the second direction electrically connected to the battery cell group upstream in the first direction, and the other end in the second direction electrically connected to the battery cell group downstream in the first direction; Wherein, the connection positions of the two interconnected battery cell groups form a flexible bent conductive structure, and the first direction and the second direction are arranged at an angle.

2. The battery device according to claim 1, characterized in that: The thickness direction of the soft-pack battery cell is the first direction, and the battery cell group includes one soft-pack battery cell or includes a plurality of soft-pack battery cells arranged flat on a plane perpendicular to the first direction.

3. The battery device according to claim 2, characterized in that: The plurality of soft-packed battery cells arranged flatly in the battery cell group are arranged along the second direction, and two adjacent soft-packed battery cells are connected at adjacent positions.

4. The battery device according to claim 1, characterized in that: The battery device includes a first battery cell row, which includes a plurality of battery cell groups stacked along a first direction, and each battery cell group in the first battery cell row includes one soft-pack battery cell.

5. The battery device according to claim 4, characterized in that: 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, and the ends of two adjacent soft-pack battery cells on the same side are connected by the flexible bent conductive structure.

6. The battery device according to claim 5, characterized in that: The length of each of the soft-packed battery cells in the first battery cell row is the same and the width of each of the soft-packed battery cells is the same.

7. The battery device according to claim 5, characterized in that: The battery device includes a plurality of first battery cell rows arranged along the second direction.

8. The battery device according to claim 7, characterized in that: Two of the first battery cell rows adjacent to each other along the second direction are connected via an inter-row conductive structure.

9. The battery device according to claim 8, characterized in that: In two of the first battery cell rows adjacently arranged in the second direction, adjacent ends of two battery cell groups located at the ends in the first direction and opposite to each other along the second direction are connected through the inter-row conductive structure.

10. The battery device according to claim 1, characterized in that: The battery device includes a second battery cell row, which includes a plurality of battery cell groups stacked along a first direction, and at least one of the battery cell groups in the second battery cell row includes a plurality of soft-pack battery cells.

11. The battery device according to claim 10, characterized in that: The first direction is the thickness direction of the soft-pack battery cell, and all the soft-pack battery cells in the battery cell group including a plurality of the soft-pack battery cells are laid flat on a plane perpendicular to the first direction.

12. The battery device according to claim 10, characterized in that: The second direction is the length direction of the soft-pack battery cell. The multiple soft-pack battery cells included in the battery cell group in the second battery cell row are arranged along the second direction. The adjacent ends of two adjacent soft-pack battery cells are connected by a conductive structure. The conductive structure located at the end of the battery cell group along the second direction is a flexible structure and is bent to form the flexible bent conductive structure.

13. The battery device according to claim 12, characterized in that: The total length of each of the battery cell groups in the second battery cell row along the second direction is consistent.

14. The battery device according to claim 10, characterized in that: Each of the battery cell groups in the second battery cell row includes the soft-pack battery cells having the same shape, the same arrangement and the same number.

15. The battery device according to claim 1, characterized in that: The second direction is the length direction of the soft-pack battery cell, and electrode terminals extend from both ends of the soft-pack battery cell in the length direction respectively. Adjacent soft-pack battery cells are connected through the adjacently arranged electrode terminals, and the battery cell group includes one soft-pack battery cell or includes a plurality of soft-pack battery cells arranged in sequence along the second direction.

16. The battery device according to claim 15, characterized in that: The first direction is the thickness direction of the soft-pack battery cell, the width direction of the soft-pack battery cell is the third direction, and the projections of two battery cell groups stacked and adjacently arranged along the first direction overlap along the first direction.

17. The battery device according to claim 1, characterized in that: The soft-pack battery cell includes a soft-pack shell and an electrode terminal, the electrode terminal is connected to the electrode assembly in the soft-pack shell, and includes a lead-out portion extending out of the soft-pack shell, the lead-out portions adjacent to adjacent soft-pack shells are directly or indirectly connected to form a conductive structure, and the conductive structure located at the end of the battery cell group along the second direction is a flexible structure and is bent to form the flexible bent conductive structure.

18. The battery device according to claim 17, characterized in that: The lead-out portions from the two soft-pack battery cells in the flexible bending conductive structure are overlapped and connected.

19. The battery device according to claim 18, characterized in that: The two lead-out portions constituting the overlapping connection are connected at the overlapping portion by welding or conductive adhesive.

20. The battery device according to claim 18, characterized in that The overlapping connection positions of the two lead-out portions in the flexible bending conductive structure are staggered from the bending positions of the flexible bending conductive structure.

21. The battery device according to claim 20, characterized in that The bending position of the flexible bending conductive structure is centered, and the overlapping connection position of the two lead-out portions in the flexible bending conductive structure is located on one side of the bending position in the first direction and opposite to the corresponding battery cell group along the second direction.

22. The battery device according to claim 20, characterized in that The two lead-out parts constituting the overlapping connection in the flexible bending conductive structure are respectively the first lead-out part and the second lead-out part, the battery cell group extending out of the first lead-out part is the first battery cell group, and the battery cell group extending out of the second lead-out part is the second battery cell group, and the first battery cell group and the second battery cell group are stacked adjacent to each other; the length of the first lead-out part is greater than the length of the second lead-out part, the first lead-out part includes an extension section, a bending section and an overlapping section, the extension section is opposite to the first battery cell group along the second direction, the overlapping section is spaced from the extension section along the first direction, the overlapping section is opposite to the second battery cell group along the second direction, the bending section is bent and its two ends are respectively connected to the extension section and the overlapping section, the second lead-out part is opposite to the second battery cell group along the second direction, and is overlapped and connected with the overlapping section.

23. The battery device according to claim 22, characterized in that The second direction is the length direction of the soft-pack battery cell, and both ends of each of the soft-pack battery cells in the length direction respectively have the first lead-out portion and the second lead-out portion.

24. The battery device according to claim 20, characterized in that The two lead-out portions forming an overlapping connection in the flexible bending conductive structure have the same length, and the bending position of the flexible bending conductive structure is located at a stacked non-connected portion of the two lead-out portions.

25. The battery device according to claim 17, characterized in that: The lead-out portions from the two soft-pack battery cells in the flexible bending conductive structure are indirectly connected via a transition piece.

26. The battery device according to claim 25, characterized in that The adapter piece is overlapped and connected with the lead-out portion.

27. The battery device according to claim 26, characterized in that The overlapping connection position between the adapter plate and the lead-out portion is staggered with the bending position of the flexible bending conductive structure.

28. The battery device according to claim 25, characterized in that The flexible bending conductive structure is bent at the adapter sheet, and the bending position of the flexible bending conductive structure is centered.

29. The battery device according to claim 1, characterized in that The bending position of the flexible bending conductive structure is staggered from the connecting conductive position of two battery cell groups in the flexible bending conductive structure.

30. The battery device according to claim 1, characterized in that The bending corner of the flexible bending conductive structure is a rounded corner.

31. The battery device according to claim 30, characterized in that The flexible bent conductive structure is U-shaped or C-shaped.

32. The battery device according to claim 1, characterized in that The two side edges of the battery cell group in the third direction are respectively a first edge and a second edge, and the flexible bending conductive structure is arranged close to the first edge relative to the second edge in the third direction to form a first reserved space on a side of the flexible bending conductive structure close to the second edge, and the first direction, the second direction and the third direction are perpendicular to each other.

33. The battery device according to claim 32, characterized in that The flexible bending conductive structure is located on a side of a center line of the battery cell group in the third direction close to the first edge.

34. The battery device according to claim 32, characterized in that The battery device includes a box for loading the soft-pack battery cells, a reinforcing partition is sandwiched between at least two of the battery cell groups adjacent to each other along the first direction, the rigidity of the reinforcing partition is greater than the rigidity of the soft-pack shell of the soft-pack battery cells, the reinforcing partition has a connecting portion protruding from the battery cell group along the second direction, the connecting portion extends into the first reserved space and is connected to the box.

35. The battery device according to claim 34, characterized in that The box body comprises a box body and a mounting bracket, wherein the mounting bracket is mounted in the box body, the mounting bracket is arranged on one side of the battery cell group in the second direction, and the connecting portion is connected to the mounting bracket.

36. The battery device according to claim 35, characterized in that An edge of the connecting portion on one side close to the second edge in the third direction is a first edge, an edge of the mounting bracket on one side close to the second edge in the third direction is a second edge, and both the first edge and the second edge are located on a side of the second edge close to the first edge, so that the connecting portion and the mounting bracket form a second reserved space on a side away from the first edge in the third direction.

37. The battery device according to claim 35, characterized in that One of the length direction and the width direction of the box is the first direction, the other is the second direction, the height direction of the box is the third direction, and a plurality of mounting brackets arranged along the first direction are respectively provided at both ends of the box body in the second direction.

38. The battery device according to claim 1, characterized in that The thickness direction of the soft-pack battery cell is the first direction, the battery cell group includes one soft-pack battery cell or includes a plurality of soft-pack battery cells arranged flat on a plane perpendicular to the first direction, a reinforcing partition is sandwiched between at least two adjacent battery cell groups along the first direction, the thickness direction of the reinforcing partition is the first direction, the stiffness of the reinforcing partition is greater than the stiffness of the soft-pack shell of the soft-pack battery cell, the thickness of the reinforcing partition is less than the thickness of the battery cell group, and the reinforcing partition is configured to be able to exchange heat with the electrode assembly in the soft-pack battery cell through the soft-pack shell in contact with it.

39. The battery device according to claim 38, characterized in that The reinforcing partition covers more than 80% of the total area of ​​all the soft-pack batteries in the battery group.

40. The battery device according to claim 38, characterized in that A plurality of reinforcing partitions are sandwiched between the plurality of battery cell groups stacked along the first direction, and only one reinforcing partition is sandwiched between each two adjacent battery cell groups. The two adjacent reinforcing partitions arranged along the first direction are connected by a connecting plate located on one side of the battery cell group in the third direction, and the first direction, the second direction and the third direction are perpendicular to each other.

41. The battery device according to claim 1, characterized in that A buffer is sandwiched between at least two of the battery cell groups adjacent to each other along the first direction, and the rigidity of the buffer is smaller than the rigidity of the soft-package shell of the soft-package battery cell.

42. The battery device according to claim 38, characterized in that A buffer is sandwiched between at least two of the battery cell groups adjacent to each other along the first direction, the stiffness of the buffer is less than the stiffness of the soft-pack shell of the soft-pack battery cell, and a plurality of the reinforcing partitions and a plurality of the buffers are sandwiched between the plurality of the battery cell groups stacked along the first direction, and each of the battery cell groups is sandwiched between the buffer and the reinforcing partition.

43. The battery device according to claim 1, characterized in that The soft-pack shell of the soft-pack battery cell 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, and 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.

44. The battery device according to claim 43, 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.

45. The battery device according to claim 43, characterized in that The two membrane parts are separate parts and have edge sealing structures around the soft-pack battery core.

46. ​​The battery device according to claim 43, 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.

47. The battery device according to claim 1, characterized in that The battery device includes a battery cell row, and the battery cell row includes a plurality of battery cell groups stacked along the first direction. The battery device includes a box for loading the battery cell row, one of the length direction and the width direction of the box is the first direction, and the other is the second direction, the thickness direction of the soft-pack battery cell is the first direction, the second direction is the length direction of the soft-pack battery cell, the width direction of the soft-pack battery cell is consistent with the height direction of the box, and the box includes cover plates arranged on both sides of the battery cell row along the height direction of the box.

48. The battery device according to claim 47, characterized in that At least one of the cover plates exchanges heat with the battery cell.

49. The battery device according to claim 47, characterized in that Structural adhesive is filled between the battery cell row and the cover plate.

50. The battery device according to claim 49, characterized in that The structural adhesive is a thermally conductive adhesive.

51. The battery device according to claim 49, characterized in that A rubber blocking strip is provided in the box body, the cover plate includes a bottom plate located below the battery cell row, a fitting gap is formed between the bottoms of two adjacent soft-pack battery cells arranged along the first direction, and the rubber blocking strip is located between the fitting gap and the bottom plate.

52. The battery device according to claim 51, characterized in that Two adjacent soft-pack battery cells share one rubber blocking strip.

53. The battery device according to claim 52, 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.

54. The battery device according to claim 47, characterized in that The battery device further includes: a heat exchange plate, which is arranged between the battery cell row and at least one of the cover plates.

55. The battery device according to any one of claims 1 to 54, 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.

56. An electrical device, characterized in that: Comprising a battery device according to any one of claims 1-55.

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