Battery cell group module and battery pack

Abstract

The utility model provides a battery cell group module and a battery pack, the battery cell group module comprises a plurality of battery cell stacking bodies, the plurality of battery cell stacking bodies are arranged along a first direction, and each battery cell stacking body comprises a plurality of battery cells stacked along a second direction; the connecting beams are arranged at the two ends, distributed in the first direction, of each battery cell stacking body; the two side plate groups are located on the two sides, distributed in the second direction, of the battery cell stacking body; and the buffer assembly is arranged between the side plate groups and the battery cell stacking body, the buffer assembly abuts against the end surface of the battery cell stacking body and can stretch or contract in the second direction, and the two side plate groups are connected through the connecting beam and clamp the battery cell stacking body and the buffer assembly. According to the battery cell group module and the battery pack provided by the invention, a plurality of buffer layers arranged between the adjacent battery cells are replaced by the buffer assemblies, so that the assembly process of the battery cell group module is simplified while the number of parts and the material cost are reduced.

Description

Technical Field

[0001] This application relates to the field of power battery technology, and in particular to a cell module and a battery pack. Background Technology

[0002] A battery pack can contain multiple battery modules, each of which includes multiple stacked battery cells. During charging and discharging, the battery cells expand and deform. To prevent excessive pressure on the expanded and deformed cells, a foam layer can be placed between adjacent cells. This foam layer has low hardness and high resilience, absorbing the stress from the cell expansion and deformation, thus acting as a buffer.

[0003] However, when a large number of battery cells are installed in the battery pack, a large number of foam layers also need to be installed in the battery pack, which not only leads to higher material costs, but also makes the assembly process more complicated. Utility Model Content

[0004] In view of this, the purpose of this application is to propose a cell assembly module and battery pack to at least partially solve the problems of high material costs and complex assembly processes caused by setting foam layers between adjacent cells.

[0005] Based on the above objectives, a first aspect of this application provides a battery cell stack, comprising: a plurality of battery cell stacks arranged along a first direction, each battery cell stack including a plurality of battery cells stacked along a second direction; a plurality of connecting beams, each of the battery cell stacks having connecting beams arranged at both ends along the first direction; two side plate groups located on both sides of the battery cell stack along the second direction; and a buffer assembly disposed between the side plate groups and the battery cell stack, the buffer assembly abutting against the end surface of the battery cell stack and being capable of extending or retracting along the second direction, wherein the two side plate groups are connected and clamp the battery cell stack and the buffer assembly by connecting beams.

[0006] Optionally, the buffer assembly includes a pressure-applying member and a first elastic member disposed along the second direction. The pressure-applying member is spaced apart from the side plate group along the second direction. The first elastic member is connected between the pressure-applying member and the side plate group. The pressure-applying member abuts against the end surface of the cell stack.

[0007] Optionally, the pressure-applying member includes a rigid plate-like structure, and the first elastic element is uniformly disposed on the surface of the pressure-applying member away from the cell stack.

[0008] Optionally, the first elastic element includes a plurality of elastic sub-elements spaced apart.

[0009] Optionally, the side plate assembly has a groove on the surface near the pressure-applying member, and the first elastic member is partially inserted into the groove.

[0010] Optionally, each of the side plate groups is connected to a plurality of the buffer components, which are spaced apart along the first direction and correspond one-to-one with the plurality of battery cell stacks.

[0011] Optionally, each of the side plate groups includes a plurality of side plate segments distributed along the first direction and detachably connected. The side plate segments located on both sides of the same cell stack are detachably connected to the connecting beams located at both ends of the corresponding cell stack, and clamp the cell stack and the buffer assembly when connected.

[0012] Optionally, the cell assembly module further includes a battery management system, which includes multiple slave control boards. Each side panel assembly is equipped with a slave control board, and the multiple slave control boards are respectively connected to multiple cell stacks.

[0013] Optionally, the battery cell includes a pouch cell.

[0014] Based on the same inventive concept, a second aspect of this application also provides a battery pack, including: a housing, and a cell assembly module as described in the first aspect connected to the housing.

[0015] Optionally, the housing includes a plate-shaped lower housing, and the side panel assembly is fixedly connected to the lower housing by fasteners.

[0016] As can be seen from the above, the cell module and battery pack provided in this application, under the action of the connecting beam, allow the two side plate assemblies to clamp the cell stack, keeping the multiple cells in the cell stack in a stacked state. When a cell expands, the resulting expansion stress is transmitted to the end surface of the cell stack and acts on the buffer assembly between the side plate assemblies and the cell stack. The buffer assembly can absorb the expansion stress by contracting along the second direction, thereby releasing the expansion stress inside the cell stack and preventing excessive expansion stress from damaging the cells.

[0017] Meanwhile, since this application replaces multiple buffer layers between adjacent cells with a buffer assembly disposed between the cell stack and the side plate assembly, it reduces the number of parts and material costs, simplifies the assembly process of the cell assembly module, helps improve assembly efficiency, and is suitable for mass production. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in this application or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of a battery cell assembly module according to an embodiment of this application;

[0020] Figure 2 This is a partial top-view cross-sectional view of the battery cell module according to an embodiment of this application;

[0021] Figure 3 for Figure 2 An enlarged schematic diagram of part A in the middle;

[0022] Figure 4 This is a schematic diagram of the side panel assembly of the battery cell module according to an embodiment of this application;

[0023] Figure 5 This is an exploded view of the side plate assembly of the battery cell module according to an embodiment of this application;

[0024] Figure 6 This is an exploded view of the battery cell module according to an embodiment of this application;

[0025] Figure 7 This is a partial exploded view of the battery pack according to an embodiment of this application.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1000, Battery Cell Assembly Module;

[0028] 100. Cell stack; 110. Cell;

[0029] 200, Side panel assembly; 210, Groove; 220, Side panel segment;

[0030] 300. Connecting beam;

[0031] 400, Buffer assembly; 410, First elastic element; 411, Elastic sub-element; 420, Pressure-applying element;

[0032] 2000, enclosure; 2100, lower enclosure;

[0033] 3000, Fasteners. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0035] It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components described in these embodiments do not limit the scope of this application.

[0036] At the same time, it should be understood that, for ease of description, the dimensions of the various parts shown in the accompanying drawings are not drawn according to actual scale.

[0037] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the scope of this application and its application or use.

[0038] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in the embodiments of this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0039] Figure 1 A schematic diagram of the battery cell module 1000 is shown.

[0040] The applicant's research found that, for a single direction (such as...) Figure 1 If multiple battery cells 110 stacked in the Y direction are not used to provide a buffer structure layer between adjacent battery cells 110, but instead a buffer structure is provided at the beginning and / or end of the battery cells 110 stacked in the same column, the buffer structure can also absorb the expansion stress when the stacked battery cells 110 expand.

[0041] In view of this, embodiments of this application provide a battery cell module 1000. Figure 2 This diagram shows a partial top-view cross-section of the battery cell module 1000. Figure 3 Showing Figure 2 An enlarged schematic diagram of part A in the middle.

[0042] like Figure 1 The battery cell module 1000 includes: multiple battery cell stacks 100, which are arranged along a first direction (e.g., ...). Figure 1 In the X direction), each cell stack 100 includes multiple cells along the second direction (e.g., ...). Figure 1 The battery cells 110 are stacked in the Y direction; multiple connecting beams 300 are arranged at both ends of each battery cell stack 100 along the first direction; two side plate groups 200 are located on both sides of the battery cell stack 100 along the second direction, and the two side plate groups 200 are connected by the connecting beams 300 and clamp the battery cell stack 100 to provide pre-tightening force for the battery cell stack 100, thereby facilitating the transportation and installation of the battery cell module 1000 into the box.

[0043] like Figure 2 and Figure 3 The cell assembly module 1000 also includes a buffer assembly 400, which is disposed between the side plate assembly 200 and the cell stack 100. The buffer assembly 400 abuts against the end surface of the cell stack 100 and can extend or retract in a second direction. Furthermore, the two side plate assemblies 200 are connected and clamped to the cell stack 100 and the buffer assembly 400 by a connecting beam 300.

[0044] For example, along the second direction, no buffer layer is provided between adjacent cells 110. The buffer layer is a structural layer used to absorb the expansion stress of the cell 110, which can be a foam layer or a structural layer formed of other elastic materials.

[0045] For example, the end surface of the cell stack 100 can be the side surface of the cell 110 with a larger surface area; or it can be the surface of a structural layer covering the surface of the cell 110.

[0046] For example, the connecting beam 300 can be connected to the side plate assembly 200 by means of plug-in, snap-fit, adhesive connection, bolt connection or welding.

[0047] For example, in the two side plate assemblies 200, one of them is provided with a buffer assembly 400 between it and the cell stack 100, and the other can directly contact the end surface of the cell stack 100; in other words, only one end of the same cell stack 100 along the second direction is provided with a buffer assembly 400; or, both side plate assemblies 200 are provided with a buffer assembly 400 between them and the end surface of their respective corresponding cell stack 100; in other words, both ends of the same cell stack 100 along the second direction are provided with a buffer assembly 400.

[0048] The two side plate assemblies 200 and the connecting beam 300 can be constructed into a frame structure. The connecting beam 300 can provide tension to the two side plate assemblies 200 so that the two side plate assemblies 200 can maintain a preset distance from the end surface of their respective cell stack 100.

[0049] When the cell 110 in the cell stack 100 does not expand, the side plate group 200 can apply a compressive force to the end surface of the corresponding cell stack 100 through the buffer component 400 to ensure that the two side plate groups 200 can clamp the cell stack 100, thereby keeping the multiple cells 110 in the cell stack 100 in a stacked state.

[0050] When a cell 110 in the cell stack 100 expands, the expanded cell 110 exerts an expansion stress along the second direction on adjacent cells 110. This expansion stress is continuously transmitted from the stacked cells 110 to the end surface of the cell stack 100. The end surface of the cell stack 100 transmits the expansion stress to the buffer assembly 400 it abuts. When the expansion stress exceeds a preset threshold, the buffer assembly 400 is forced to contract towards the side plate assembly 200 along the second direction to absorb the expansion stress. At this time, the two side plate assemblies 200 can still clamp the cell stack 100.

[0051] When the battery cell 110 in the battery cell stack 100 expands and then contracts, the buffer assembly 400 can also extend in the second direction so that the buffer assembly 400 keeps in contact with the end surface of the battery cell stack 100, ensuring that the two side plate assemblies 200 can continuously clamp the battery cell stack 100.

[0052] In this embodiment, the battery cell assembly module 1000, under the action of the connecting beam 300, allows the two side plate assemblies 200 to clamp the battery cell stack 100 and the buffer assembly 400, keeping the multiple battery cells 110 in the battery cell stack 100 in a stacked state. When a battery cell 110 expands, the resulting expansion stress is transmitted to the end surface of the battery cell stack 100 and acts on the buffer assembly 400 between the side plate assemblies 200 and the battery cell stack 100. The buffer assembly 400 can absorb the expansion stress by contracting along the second direction, thereby releasing the expansion stress inside the battery cell stack 100 and preventing excessive expansion stress from damaging the battery cells 110.

[0053] Meanwhile, since this embodiment replaces multiple buffer layers between adjacent cells 110 with a buffer assembly 400 disposed between the cell stack 100 and the side plate assembly 200, it reduces the number of parts and material costs, simplifies the assembly process of the cell assembly module 1000, helps improve assembly efficiency, and is suitable for mass production.

[0054] Figure 4 A schematic diagram of the side panel assembly 200 is shown.

[0055] like Figure 3 and Figure 4In some embodiments, the buffer assembly 400 includes a pressure member 420 and a first elastic member 410 disposed along a second direction. The pressure member 420 is spaced apart from the side plate assembly 200 along the second direction. The first elastic member 410 is connected between the pressure member 420 and the side plate assembly 200. The pressure member 420 abuts against the end surface of the cell stack 100.

[0056] For example, the pressure member 420 may be bonded and fixed to the end surface of the cell stack 100.

[0057] For example, the first elastic element 410 can be connected to the pressure-applying element 420 by means of plugging, snapping, adhesive bonding, bolting, or welding. Similarly, the first elastic element 410 can also be connected to the side plate assembly 200 by one of the above methods.

[0058] It should be noted that the first elastic element 410 is in a compressed state whether the battery cell 110 is expanded or not.

[0059] Since the side plate assembly 200 maintains a preset distance from the end surface of the cell stack 100, the side plate assembly 200 can support the first elastic member 410 of the buffer assembly 400 in the second direction, so that the pressure member 420 can remain in contact with the end surface of the cell stack 100 under the elastic force of the first elastic member 410, so that the two side plate assemblies 200 can reliably clamp the cell stack 100.

[0060] When the battery cell 110 expands, the entire battery cell stack 100 applies expansion stress to the buffer assembly 400. This expansion stress is transmitted to the first elastic member 410 through the pressure member 420. Under the action of the expansion stress, the first elastic member 410 further contracts to absorb the expansion stress generated by the battery cell stack 100. At the same time, since the distance between the side plate assembly 200 and the end surface of the battery cell stack 100 remains unchanged, the buffer assembly 400 can still press the end surface of the battery cell stack 100 through the pressure member 420 under the support of the side plate assembly 200, so that the two side plate assemblies 200 can reliably clamp the battery cell stack 100.

[0061] As can be seen from the foregoing, during the extension or contraction of the buffer assembly 400, the first elastic member 410 is deformed, while the pressure member 420, which is in contact with the surface of the cell stack 100, may not be deformed. This is to prevent changes in the shape and flatness of the surface in contact with the cell stack 100 due to the deformation of the pressure member 420, thus avoiding adverse effects on the cell stack 100.

[0062] Figure 5 An exploded view of the side panel assembly 200 is shown.

[0063] like Figure 5 In some embodiments, the pressure member 420 includes a rigid plate-like structure, and the first elastic member 410 is uniformly disposed on the surface of the pressure member 420 away from the cell stack 100.

[0064] For example, the first elastic member 410 may be a layered structure of uniform thickness, which may at least partially cover the surface of the pressure member 420 away from the cell stack 100.

[0065] For example, the first elastic element 410 can be a plurality of elastic structural elements evenly spaced apart, such as springs or rubber blocks.

[0066] The pressure-applying member 420 is designed as a rigid plate structure. On the one hand, this ensures that the surface of the member in contact with the cell stack 100 will not deform under the pressure of the first elastic member 410, thus preventing damage to the cell stack 100. On the other hand, the thinness of the plate structure also helps to reduce the weight of the pressure-applying member 420, thereby helping to improve the energy density of the battery pack with the cell assembly module 1000 of this embodiment installed.

[0067] Meanwhile, the uniform arrangement of the first elastic element 410 can make the compressive force applied by the pressure element 420 to the cell stack 100 more uniform, so as to prevent the cell 110 in the cell stack 100 from deforming due to uneven force, and avoid affecting the electrochemical performance and service life of the cell 110.

[0068] like Figure 5 In some embodiments, the first elastic element 410 includes a plurality of elastic sub-elements 411 spaced apart.

[0069] For example, the elastic element 411 may include a pair of springs.

[0070] For example, when the width of the side panel assembly 200 (along) Figure 5 When the Z-direction dimension is small, the elastic sub-component 411 only extends along the length direction of the side plate assembly 200 (along... Figure 5 The dimensions in the X direction are evenly spaced.

[0071] When the battery cell stack 100 includes multiple battery cells 110, the superimposed deformation caused by the simultaneous expansion of multiple battery cells 110 is large, which requires the first elastic member 410 to be able to achieve a large degree of deformation in the second direction.

[0072] If the first elastic element 410 is designed as a continuous layer structure, it is difficult to achieve a large degree of overall deformation. Therefore, in this embodiment, the first elastic element 410 is designed as a plurality of spaced elastic sub-elements 411 to increase the deformation of the first elastic element 410, so that the buffer assembly 400 can meet the requirement of absorbing the expansion stress of the battery cell stack 100.

[0073] like Figure 3 and Figure 5 As shown, in some embodiments, the side plate assembly 200 has a groove 210 on the surface near the pressure member 420, and the first elastic member 410 is partially inserted into the groove 210.

[0074] For example, the first elastic element 410 can also adhere to the inner wall of the groove 210 while being inserted into the groove 210.

[0075] For example, when the first elastic member 410 includes a plurality of elastic sub-members 411, the number of grooves 210 is the same as the number of elastic sub-members 411.

[0076] In this embodiment, the first elastic member 410 can be connected to the side plate assembly 200 via the groove 210, and the groove wall of the groove 210 can limit the first elastic member 410, preventing it from moving along the surface of the side plate assembly 200. Simultaneously, when assembling the battery cell module 1000, the first elastic member 410 can be positioned via the groove 210. That is, simply inserting the first elastic member 410 into the groove 210 ensures that it is located in a preset position, helping to reduce the assembly difficulty of the battery cell module 1000.

[0077] Figure 6 An exploded view of the battery cell module 1000 is shown.

[0078] like Figure 2 In some embodiments, each side plate group 200 is connected to a plurality of buffer components 400, which are spaced apart along a first direction and correspond one-to-one with a plurality of battery cell stacks 100.

[0079] For example, the side panel assembly 200 can be a one-piece molded structure, or the side panel assembly 200 can be a structure in which at least two panel segments are connected end to end in sequence.

[0080] The same side plate assembly 200 can simultaneously support at least two buffer components 400. When multiple buffer components 400 are connected to the same side plate assembly 200, multiple connecting beams 300 can be connected to the side plate assembly 200 to ensure that the connecting beams 300 can provide uniform and sufficient tension to the side plate assembly 200, and to ensure that each buffer component 400 can reliably abut against the end surface of the corresponding cell stack 100.

[0081] At the same time, the expansion amounts of different cells 110 are different, and correspondingly, the dimensions of different cell stacks 100 along the second direction are also different. Therefore, in this embodiment, one buffer component 400 corresponds to only one cell stack 100, and the shrinkage deformation amount of each buffer component 400 is matched only with the expansion deformation amount of the corresponding cell stack 100, so that each cell stack 100 can be subjected to a relatively reliable compressive force, so that each cell stack 100 can be reliably clamped.

[0082] like Figure 6 In some embodiments, each side plate group 200 includes a plurality of side plate segments 220 distributed along a first direction and detachably connected. The side plate segments 220 located on both sides of the same cell stack 100 are detachably connected to the connecting beams 300 located at both ends of the corresponding cell stack 100, and clamp the cell stack 100 and the buffer assembly 400 when connected.

[0083] For example, two adjacent side plate segments 220 can be detachably connected end to end by means of fasteners or snap-fit. The side plate segments 220 and the connecting beam 300 can also be detachably connected end to end by means of fasteners or snap-fit.

[0084] For example, in two adjacent side plate segments 220, the beginning end of one is stacked with the end end of the other, and the connecting beam 300 corresponds to the stacked portion of the side plate segment 220. Fasteners pass through the stacked portion of the side plate segment 220 and connect to the corresponding connecting beam 300. By using the same fastener, the two adjacent side plate segments 220 and the connecting beam 300 can be mutually fixed, reducing the number of fasteners in the battery cell module 1000. This not only helps reduce the material cost of the battery cell module 1000 but also simplifies the assembly process and improves assembly efficiency.

[0085] Each cell stack 100 is provided with a pair of side plate segments 220. The pair of side plate segments 220 can reliably clamp the cell stack 100 under the action of the connecting beam 300 connected to them.

[0086] The side plate assembly 200 in this embodiment adopts a modular design. The length of the side plate assembly 200 can be adjusted by increasing or decreasing the number of side plate segments 220, so that the side plate assembly 200 can provide a stable clamping force for different numbers of battery cell stacks 100. At the same time, the modular design can also effectively reduce the number of specifications of the side plate assembly 200 and reduce material management costs.

[0087] Meanwhile, the adjacent side plate sections 220 and the side plate section 220 and the connecting beam 300 are detachable connections, which makes the battery cell module 1000 have good maintainability.

[0088] like Figure 6 In some embodiments, the cell pack module 1000 further includes a battery management system, which includes multiple slave control boards. Each side panel group 200 is equipped with a slave control board, and the multiple slave control boards are respectively connected to multiple cell stacks 100. Furthermore, each side panel segment 220 is equipped with a slave control board, and the slave control board is electrically connected to the cell stack 100 corresponding to the side panel segment 220.

[0089] For example, the control panel and side panel segment 220 can be connected by adhesive, snap-fit ​​or fasteners (e.g., screws).

[0090] It should be noted that for the same side panel group 200, the side panel segments 220 included therein correspond one-to-one with the cell stack 100, and the slave control board connected to the side panel segment 220 can also correspond one-to-one with the cell stack 100.

[0091] The slave control board is electrically connected to multiple cells 110 in the corresponding cell stack 100, enabling it to collect voltage and temperature data of each connected cell 110 and perform real-time monitoring. The slave control board can also communicate with the main control board in the battery management system, allowing it to send data to or receive control commands from the main control board.

[0092] The slave control board is connected to the side plate segment 220, which can fix the slave control board in a preset position and form a reliable connection with the battery cell 110 and / or other devices. In this embodiment, the need for a fixing bracket for the slave control board in the battery cell module 1000 is eliminated, which helps improve the internal space utilization of the battery cell module 1000 and increase its energy density.

[0093] In some embodiments, cell 110 includes pouch cell.

[0094] The two side plate assemblies 200 can clamp the multiple cells 110 stacked in the cell stack 100. Even if the cell 110 is a soft-pack cell, the multiple soft-pack cells in the cell stack 100 can be kept in a stacked state, which is convenient for assembly and transportation.

[0095] Based on the same inventive concept and in conjunction with the description of the cell assembly module 1000 in the above embodiments, this embodiment provides a battery pack that has the corresponding technical effects of the cell assembly module 1000 in the above embodiments, which will not be repeated here.

[0096] Figure 7 A partial explosion diagram of the battery pack is shown.

[0097] like Figure 7A battery pack includes: a housing 2000, and a cell assembly module 1000 as described in the above embodiments connected to the housing 2000.

[0098] For example, the battery cell module 1000 can be connected to the housing 2000 by means of plug-in, snap-in, adhesive connection, welding or bolt connection.

[0099] In this embodiment, the cell module 1000 can be directly connected to the housing 2000, eliminating the need to assemble the cell module 1000 into a battery module. This not only reduces the number of battery pack components and material costs, simplifies the assembly process, and improves the efficiency of assembly into the housing, but also helps to increase the energy density of the battery pack.

[0100] like Figure 7 In some embodiments, the housing 2000 includes a plate-shaped lower housing 2100, and the side panel assembly 200 is fixedly connected to the lower housing 2100 by fasteners 3000.

[0101] For example, the housing 2000 may also include a cover, and the lower housing 2100 may also include a flange surrounding the battery cell module 1000, the lower housing 2100 being connected to the cover via the flange.

[0102] For example, fastener 3000 can be a bolt, screw, or threaded post.

[0103] After the fastener 3000 passes through the side plate assembly 200, one end of the fastener 3000 extending out of the side plate assembly 200 can be connected to the lower housing 2100 (for example, when the fastener 3000 is a bolt, and the lower end extends out of the side plate assembly 200, it can be threadedly connected to the lower housing 2100), and the other end (for example, the nut of the bolt) can abut against the side plate assembly 200 so that the side plate assembly 200 and the lower housing 2100 are fitted and fixed, thereby realizing the connection between the battery cell module 1000 and the housing 2000.

[0104] It should be noted that some embodiments of this application have been described above. Other embodiments are within the scope of the appended claims.

[0105] The various embodiments in this application are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0106] The description in this application is given for illustrative purposes and is not intended to be exhaustive or to limit the application to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical application of this application and to enable those skilled in the art to understand this application and design various embodiments with various modifications suitable for a particular purpose.

[0107] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of this application is limited to these examples; under the concept of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of the embodiments of this application as described above, which are not provided in detail for the sake of brevity.

[0108] Although this application has been described in conjunction with specific embodiments thereof, many substitutions, modifications and variations of these embodiments will be apparent to those skilled in the art from the foregoing description.

[0109] The embodiments of this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of this application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of this application should be included within the protection scope of this application.

Claims

1. A battery cell assembly module, characterized in that, include: Multiple battery cell stacks are arranged along a first direction, and each battery cell stack includes multiple battery cells stacked along a second direction. Multiple connecting beams are provided at both ends of each of the cell stacks distributed along the first direction; Two side plate assemblies, the two side plate assemblies being located on both sides of the cell stack distributed along the second direction; A buffer assembly is disposed between the side plate group and the cell stack. The buffer assembly abuts against the end surface of the cell stack and is capable of extending or retracting along the second direction. The two side plate groups are connected by the connecting beam and clamp the cell stack and the buffer assembly.

2. The cell assembly module according to claim 1, characterized in that, The buffer assembly includes a pressure-applying member and a first elastic member disposed along the second direction. The pressure-applying member is spaced apart from the side plate group along the second direction. The first elastic member is connected between the pressure-applying member and the side plate group. The pressure-applying member abuts against the end surface of the cell stack.

3. The battery cell module according to claim 2, characterized in that, The pressure-applying component includes a rigid plate-like structure, and the first elastic element is uniformly disposed on the surface of the pressure-applying component away from the cell stack.

4. The cell assembly module according to claim 3, characterized in that, The first elastic element includes a plurality of elastic sub-elements spaced apart.

5. The cell assembly module according to claim 2, characterized in that, The side plate assembly has a groove on the surface near the pressure member, and the first elastic member is partially inserted into the groove.

6. The cell assembly module according to claim 1, characterized in that, Each of the side plate groups is connected to a plurality of buffer components, which are spaced apart along the first direction and correspond one-to-one with a plurality of battery cell stacks.

7. The cell assembly module according to claim 1, characterized in that, Each of the side plate groups includes a plurality of side plate segments distributed along the first direction and detachably connected. The side plate segments located on both sides of the same cell stack are detachably connected to the connecting beams located at both ends of the corresponding cell stack, and clamp the cell stack and the buffer assembly when connected.

8. The cell assembly module according to claim 1, characterized in that, The cell assembly module also includes a battery management system, which includes multiple slave control boards. Each side panel assembly is equipped with a slave control board, and the multiple slave control boards are respectively connected to multiple cell stacks.

9. The cell assembly module according to claim 1, characterized in that, The battery cells include pouch cells.

10. A battery pack, characterized in that, include: The housing, and the cell assembly module connected to the housing as described in any one of claims 1 to 9.

11. The battery pack according to claim 10, characterized in that, The enclosure includes a plate-shaped lower enclosure, and the side panel assembly is fixedly connected to the lower enclosure by fasteners.

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