Battery module and battery pack

Abstract

The utility model provides a battery module and a battery pack. The battery module comprises a battery cell module, the battery cell module comprises a plurality of battery cell groups which are arranged at intervals along a first direction, and each battery cell group comprises a plurality of battery cell units which are arranged at intervals along a second direction; the CCS assembly comprises a support, the support is provided with a first side face and a second side face which are oppositely arranged in the third direction, the first side face is fixedly connected with the tops of the battery cell units, the support is provided with a glue injection hole which is formed in a penetrating mode in the third direction, and the glue injection hole corresponds to a gap between every two adjacent battery cell sets; every two of the first direction, the second direction and the third direction are perpendicular to each other. According to the technical scheme, the technical problem that the glue filling efficiency is low can be solved.

Description

Technical Field

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

[0002] During the manufacturing process of the battery module, in order to improve the structural stability of the battery module or the thermal conductivity between the cells, the gaps between the cells will be filled with thermal conductive structural glue. Since the gaps between the cells are small, in order to ensure that the gaps between the cells are completely filled with glue, the point injection method or the top glue spraying method is usually used to complete the glue filling. The point injection method has high requirements for equipment and glue. First, it is necessary to ensure that the glue needle of the equipment can be stably inserted into the gap between the cells. Secondly, it is necessary to ensure the fluidity and self-viscosity of the glue to ensure that the glue can flow out smoothly through the needle. This will increase the filling time of the glue and reduce the filling efficiency of the glue. The top glue spraying method is carried out before the welding step between the busbar and the cell. The glue is limited by the tooling to make the glue flow into the gap between the cells. However, this method will cause the welding area of ​​the cell pole to be contaminated by excess glue, so it will add a process of cleaning the residual glue. If the glue is not cleaned properly, it will also affect the welding effect, thereby affecting the performance of the product. Therefore, the existing battery module structure and glue injection method will limit the filling efficiency of the glue. Utility Model Content

[0003] The embodiments of the utility model provide a battery module and a battery pack, which can improve the technical problem of low glue filling efficiency.

[0004] In the first aspect, an embodiment of the utility model provides a battery module, the battery module comprising: a battery cell module, comprising a plurality of battery cell groups arranged at intervals along a first direction, each battery cell group comprising a plurality of battery cell units arranged at intervals along a second direction; a CCS assembly, comprising a bracket, the bracket having a first side surface and a second side surface relatively arranged along a third direction, the first side surface being fixedly connected to the top of the battery cell unit, the bracket having a glue injection hole arranged through along the third direction, the glue injection hole being arranged corresponding to the gap between two adjacent battery cell groups, and the first direction, the second direction and the third direction are perpendicular to each other.

[0005] In one embodiment, a cross gap is formed between two adjacent battery cell units in one battery cell group and two corresponding battery cell units in an adjacent battery cell group arranged along the first direction, and the glue injection hole is arranged at the center of the cross gap.

[0006] In one embodiment, the glue injection hole is a round hole, and the diameter of the glue injection hole is L1, 4mm≤L1≤6mm; or the glue injection hole is a waist-shaped hole.

[0007] In one embodiment, a groove is provided on the bracket, the groove extends along the second direction, and the groove is recessed toward the battery cell unit along the third direction, the glue injection hole is provided on the bottom of the groove, and the bottom wall of the battery cell unit corresponding to the groove is at least partially connected to the top of the battery cell unit.

[0008] In one embodiment, an accommodating groove is formed between poles of battery cell units close to each other in two adjacent battery cell groups, a groove is arranged in the accommodating groove, and an extension length of the groove along the first direction is less than or equal to an extension length of the accommodating groove along the first direction.

[0009] In one embodiment, a connector is provided at the connection between the groove and the battery cell unit, and the connector is used to fix the groove and the battery cell unit.

[0010] In one embodiment, the extension length of the groove along the first direction is L2, the extension length of the groove along the second direction is L3, and the extension length of the groove along the third direction is L4, 20mm≤L2≤22mm, 807mm≤L3≤809mm, 3.8mm≤L4≤4.2mm.

[0011] In one embodiment, the groove includes a first side wall, a bottom wall and a third side wall that are connected in sequence and arranged at an angle, the first side wall and the third side wall are located on the same side of the bottom wall, the bottom of the bottom wall corresponding to the battery cell unit is at least partially connected to the top of the battery cell unit, and the glue injection hole is arranged on the bottom wall.

[0012] In one embodiment, the included angle between the first side wall and the bottom wall and the included angle between the third side wall and the bottom wall are both right angles.

[0013] In one embodiment, the second side surface of the bracket has a receiving portion, and the CCS assembly further includes: a bus disposed in the receiving portion, the bus being fixedly connected to the pole of the battery cell unit; a collection assembly disposed on the second side surface, the collection end of the collection assembly being electrically connected to the bus and the battery cell module.

[0014] In one embodiment, a positioning portion is further provided on the bracket, and the positioning portion at least partially protrudes out of the second side surface. The positioning portion is used to limit the position of the bus and the collection component on the second side surface.

[0015] In a second aspect, an embodiment of the present invention provides a battery pack, which includes the above-mentioned battery module.

[0016] By applying the technical solution of the utility model, glue injection holes are provided on the bracket of the CCS component, and the glue injection holes are provided corresponding to the gaps between the battery cell groups. In this way, glue can be injected into the gaps between the battery cell groups through the glue injection holes after the welding step of the bus bar and the battery cell, thereby preventing the welding area of ​​the battery cell pole from being contaminated by excess glue. Therefore, there is no need to add a process of cleaning residual glue, thereby improving the filling efficiency of the glue. At the same time, there is no risk of failure in the welding of the bus bar and the battery cell. Glue can be injected into the gaps between the battery cell groups without the need for a specific glue discharge needle or equipment, and the glue injection cost of the battery module can be reduced to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a three-dimensional schematic diagram of a battery module provided by an embodiment of the utility model;

[0019] Figure 2 It is a three-dimensional schematic diagram of a partial structure of a battery module provided by an embodiment of the utility model;

[0020] Figure 3 yes Figure 2 The enlarged schematic diagram of point A in the middle;

[0021] Figure 4 is a schematic top view of a bracket provided in an embodiment of the utility model;

[0022] Figure 5 yes Figure 4 The enlarged schematic diagram of point B in the middle;

[0023] Figure 6 It is a three-dimensional schematic diagram of a bracket provided in an embodiment of the utility model;

[0024] Figure 7 yes Figure 6 The enlarged schematic diagram of the center C;

[0025] Figure 8 is a structural schematic diagram of a bracket provided by an embodiment of the utility model from another perspective;

[0026] Fig. 9 yes Figure 8 The enlarged schematic diagram of point D in the middle;

[0027] Fig.10It is a structural schematic diagram of another viewing angle of the bracket provided by an embodiment of the utility model;

[0028] Fig.11 It is a structural schematic diagram of a battery cell group of a bracket provided in an embodiment of the utility model;

[0029] Fig.12 yes Fig.11 Enlarged schematic diagram of point E in the middle.

[0030] The above drawings include the following reference numerals:

[0031] 10. battery cell module; 11. battery cell group; 12. battery cell unit; 121. cross gap; 13. receiving groove;

[0032] 20. CCS component; 21. bracket; 211. first side; 212. second side; 22. glue injection hole; 23. groove; 231. first side wall; 232. bottom wall; 233. third side wall; 24. connector; 25. accommodating part; 26. bus; 27. collection component; 28. positioning part; X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0034] The embodiments of the utility model provide a battery module and a battery pack, which can improve the technical problem of low glue filling efficiency.

[0035] like Figures 1 to 12 As shown, in the first aspect, an embodiment of the utility model provides a battery module, the battery module comprising: a battery cell module 10, comprising a plurality of battery cell groups 11 arranged at intervals along a first direction, each battery cell group 11 comprising a plurality of battery cell units 12 arranged at intervals along a second direction; a CCS assembly 20, comprising a bracket 21, the bracket 21 having a first side surface 211 and a second side surface 212 arranged opposite to each other along a third direction, the first side surface 211 being fixedly connected to the top of the battery cell unit 12, the bracket 21 having a glue injection hole 22 arranged through along the third direction, the glue injection hole 22 being arranged corresponding to the gap between two adjacent battery cell groups 11, and the first direction, the second direction and the third direction are perpendicular to each other.

[0036] By applying the technical solution of the utility model, a glue injection hole 22 is set on the bracket 21 of the CCS assembly 20, and the glue injection hole 22 is set corresponding to the gap between the battery cell groups 11. In this way, after the welding step of the bus 26 and the battery cell, glue can be injected into the gap between the battery cell groups 11 through the glue injection hole 22, thereby preventing the welding area of ​​the battery cell pole from being contaminated by excess glue. Therefore, there is no need to add a process of cleaning residual glue, which can improve the filling efficiency of the glue. At the same time, there is no risk of failure of the welding between the bus 26 and the battery cell. Glue can be injected into the gap between the battery cell groups 11 without a specific glue discharge needle or equipment, and the glue injection cost of the battery module can be reduced to a certain extent.

[0037] In the present application, a heat insulation structure is respectively arranged between adjacent battery cell groups 11 and adjacent battery cell units 12, and a gap is formed between the outer wall and the heat insulation structure between two battery cell units 12 in the first direction and between two battery cell units 12 in the second direction, and the glue injection hole 22 is arranged corresponding to the gap. In this way, after the welding of the battery cell unit 12 and the bus 26 is completed, the theoretical glue application weight is calculated, and glue with a lower viscosity is used to inject glue into the gap between the battery cell units 12.

[0038] The specific glue used is Pusaida 8152. Of course, other types can also be selected.

[0039] Specifically, the bracket 21 in the present application is made of plastic and is an integrally formed structure, which facilitates the processing of the bracket 21 and can greatly reduce the cost and development cycle of the mold. At the same time, the density of the above material is relatively low, which is conducive to reducing the overall weight of the bracket 21, and further reducing the weight of the battery module.

[0040] In the present application, a cross gap 121 is formed between two adjacent battery cell units 12 in one battery cell group 11 and two corresponding battery cell units 12 arranged along the first direction in an adjacent battery cell group 11, and the glue injection hole 22 is arranged at the center of the cross gap 121. In this way, when injecting glue, a cross gap 121 is formed between four adjacent battery cell units 12, which enables the colloid to evenly fill the gap, thereby ensuring the stability of the colloid during filling.

[0041] Furthermore, the diameter of the glue injection hole 22 is L1, 4mm≤L1≤6mm. When L1>6mm, the aperture of the glue injection hole 22 is too large, which will increase the probability of foreign matter entering the gap, which will affect the operation of the battery module, and thus the stable operation of the battery module cannot be guaranteed. When L1<4mm, the aperture of the glue injection hole 22 is too small, which is not conducive to injecting glue into the gap, thereby reducing the glue injection efficiency of the battery module. Therefore, 4mm≤L1≤6mm can not only reduce the probability of foreign matter entering the gap and ensure the stable operation of the battery module, but also facilitate the injection of glue into the gap. For example, L1 can be set to a value such as 4mm, 5mm or 6mm. The space size of the glue injection hole 22 can be set according to the actual use environment of the battery module, and no specific limitation is made here.

[0042] Specifically, the bracket 21 is provided with a groove 23, the groove 23 extends along the second direction, and the groove 23 is recessed toward the battery cell unit 12 along the third direction, the injection hole 22 is provided on the groove bottom of the groove 23, and the bottom wall 232 of the groove 23 corresponding to the battery cell unit 12 is at least partially connected to the top of the battery cell unit 12. This arrangement can increase the contact area between the bracket 21 and the battery cell module 10, thereby facilitating the improvement of the connection strength between the bracket 21 and the battery cell module 10.

[0043] In the present application, a receiving groove 13 is formed between poles of battery cell units 12 that are close to each other in two adjacent battery cell groups 11, and a groove 23 is arranged in the receiving groove 13, and the extension length of the groove 23 along the first direction is less than or equal to the extension length of the receiving groove 13 along the first direction. In this way, it can be ensured that there is no mutual interference between the structure of the groove and the receiving groove, thereby ensuring the adaptability of the groove during installation. Among them, the multiple poles of the battery cell unit 12 in a battery cell group 11 arranged along the second direction and the space between the multiple poles of the battery cell unit 12 in the adjacent battery cell group 11 arranged along the second direction form the receiving groove 13 in the present application. In this way, the space of the battery cell unit 12 is reasonably utilized, which is conducive to the miniaturization of the battery module.

[0044] Furthermore, a connector 24 is provided at the connection between the groove 23 and the battery cell unit 12, and the connector 24 is used to fix the groove 23 and the battery cell unit 12. In the present application, the connector 24 is specifically a structural adhesive. Since the structural adhesive has extremely high compression strength, can withstand a large load, and also has aging resistance, fatigue resistance, and corrosion resistance, the structural adhesive can maintain stable performance during long-term use, reduce the frequency of maintenance and replacement, and can not only reduce the use cost of the battery module, but also ensure the connection stability between the bracket 21 and the battery cell module 10. Furthermore, the structural adhesive has the advantages of excellent bonding performance and easy construction, so it can improve the efficiency of the battery module during installation.

[0045] Further, the extension length of the groove 23 along the first direction is L2, the extension length of the groove 23 along the second direction is L3, and the extension length of the groove 23 along the third direction is L4, 20mm≤L2≤22mm, 807mm≤L3≤809mm, 3.8mm≤L4≤4.2mm.

[0046] When L2>22mm, the extension length of the groove 23 along the first direction is too large, which will increase the production cost of the structure and is not conducive to the mass production of the bracket 21. When L2<20mm, the extension length of the groove 23 along the first direction is too small, which is not conducive to the processing of the structure. It is also not convenient to connect and fix the groove 23 to the battery cell unit 12, which will reduce the connection strength between the structures to a certain extent. Therefore, setting 20mm≤L2≤22mm can not only reduce the production cost of the structure, which is conducive to the mass production of the bracket 21, but also facilitate the connection and fixation of the groove 23 to the battery cell unit 12, thereby ensuring the connection strength between the structures. For example, L2 can be set to a value such as 20mm, 21mm or 22mm. The extension length of the groove 23 along the first direction can be set according to the actual use environment of the battery module, and is not specifically limited here.

[0047] When L3>809mm, the extension length of the groove 23 along the second direction is too large, which will increase the production cost of the structure and is not conducive to the mass production of the bracket 21. When L3<807mm, the extension length of the groove 23 along the second direction is too small, and it is not convenient to connect and fix the groove 23 to the battery cell unit 12, which will reduce the connection strength between the structures to a certain extent. Therefore, setting 807mm≤L3≤809mm can not only reduce the production cost of the structure, which is beneficial to the mass production of the bracket 21, but also facilitate the connection and fixation of the groove 23 to the battery cell unit 12, thereby ensuring the connection strength between the structures. For example, L3 can be set to values ​​such as 807mm, 808mm or 809mm, and the extension length of the groove 23 along the second direction can be set according to the actual use environment of the battery module, and is not specifically limited here.

[0048] When L4>4.2mm, the extension length of the groove 23 along the third direction is too large, which will increase the production cost of the structure and is not conducive to the mass production of the bracket 21. When L4<3.8mm, the extension length of the groove 23 along the third direction is too small, which is not convenient for the bottom of the groove 23 to contact the battery module 10. Therefore, setting 3.8mm≤L4≤4.2mm can not only reduce the production cost of the structure, which is conducive to the mass production of the bracket 21, but also facilitate the connection and fixation of the groove 23 to the battery unit 12. Exemplarily, L4 can be set to a value such as 3.8mm, 4mm or 4.2mm. The space size of the glue injection hole 22 can be set according to the actual use environment of the battery module, and is not specifically limited here.

[0049] Further, the groove 23 includes a first side wall 231, a bottom wall 232 and a third side wall 233 which are connected in sequence and arranged at an angle, the first side wall 231 and the third side wall 233 are located on the same side of the bottom wall 232, the bottom wall 232 corresponds to the bottom of the battery cell unit 12 and is at least partially connected to the top of the battery cell unit 12, and the glue injection hole 22 is arranged on the bottom wall 232. In the present application, the bottom wall 232 is a straight structure, and by setting the above structure, it is convenient for the bottom of the bottom wall 232 to fit with the battery cell module 10, so as to increase the contact area between the groove 23 and the battery cell module 10 as much as possible, so as to ensure the connection strength between the bracket 21 and the battery cell module 10 as much as possible.

[0050] Specifically, the angle between the first side wall 231 and the bottom wall 232, and the angle between the third side wall 233 and the bottom wall 232 are both right angles. In the present application, the cross section of the groove 23 in the third direction is a "concave" structure. Since the right-angle structure has inherent angle characteristics, the first side wall 231 or the third side wall 233 can maintain high stability when subjected to external force, thereby ensuring the stability and safety of the groove 23 when in use.

[0051] Optionally, in other embodiments of the present application, the angle between the first side wall 231 and the bottom wall 232, and the angle between the third side wall 233 and the bottom wall 232 can also be set to other angles. The specific setting should be selected according to the use environment of the battery module, which can improve the applicability of the battery module when used.

[0052] Furthermore, the second side surface 212 of the bracket 21 has a receiving portion 25, and the CCS assembly 20 further includes: a bus 26, which is arranged in the receiving portion 25, and the bus 26 is fixedly connected to the pole of the battery cell unit 12; a collection assembly 27, which is arranged on the second side surface 212, and the collection end of the collection assembly 27 is electrically connected to the bus 26 and the battery cell module 10, or the collection end of the collection assembly 27 is electrically connected to the bus 26, or the collection end of the collection assembly 27 is electrically connected to the battery cell module 10. In the present application, the bus 26 is welded and fixed to the pole of the battery cell unit 12, and the collection end of the collection assembly 27 is also welded and fixed to the bus 26 and the battery cell module 10, so that the connection strength between the CCS assemblies 20 can be ensured to improve the stability of the battery module during operation, and the collection module can collect data such as the voltage and temperature of the battery cell module 10 to ensure the safety of the battery module during use.

[0053] Specifically, the bracket 21 is further provided with a positioning portion 28, which at least partially protrudes from the second side surface 212, and is used to limit the position of the busbar 26 and the collection CCS assembly 20 on the second side surface 212. By setting the above structure, during the installation process between the CCS assemblies 20, the positioning portion 28 can be used to pre-position the busbar 26 and the collection CCS assembly 20 for subsequent installation, and at the same time, the displacement of the busbar 26 and the collection CCS assembly 20 during the installation process can be avoided, thereby improving the installation efficiency. After the installation is completed, the position of the busbar 26 and the collection CCS assembly 20 can be limited, ensuring the stability of the connection of the CCS assembly 20 after installation.

[0054] In the present application, the positioning portion 28 includes a positioning cylinder. Of course, in other embodiments of the present application, the structure of the positioning portion 28 can also be set to other shapes, such as a square or polygon, etc., which is not specifically limited here.

[0055] In a second aspect, an embodiment of the present invention provides a battery pack, which includes the above-mentioned battery module.

[0056] By applying the technical solution of the utility model, a glue injection hole 22 is set on the bracket 21 of the CCS assembly 20, and the glue injection hole 22 is set corresponding to the gap between the battery cell groups 11. In this way, after the welding step of the bus 26 and the battery cell, glue can be injected into the gap between the battery cell groups 11 through the glue injection hole 22, thereby preventing the welding area of ​​the battery cell pole from being contaminated by excess glue. Therefore, there is no need to add a process of cleaning residual glue, which can improve the filling efficiency of the glue. At the same time, there is no risk of failure of the welding between the bus 26 and the battery cell. Glue can be injected into the gap between the battery cell groups 11 without a specific glue discharge needle or equipment, and the glue injection cost of the battery module can be reduced to a certain extent.

[0057] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0058] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps described in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0059] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0060] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0061] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0062] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A battery module, characterized in that: The battery module comprises: A battery cell module, comprising a plurality of battery cell groups arranged at intervals along a first direction, each of the battery cell groups comprising a plurality of battery cell units arranged at intervals along a second direction; The CCS assembly includes a bracket, wherein the bracket has a first side surface and a second side surface arranged opposite to each other along a third direction, the first side surface is fixedly connected to the top of the battery cell unit, the bracket has a glue injection hole arranged through along the third direction, the glue injection hole is arranged corresponding to the gap between two adjacent battery cell groups, and the first direction, the second direction and the third direction are perpendicular to each other.

2. The battery module according to claim 1, characterized in that: A cross gap is formed between two adjacent battery cell units in one battery cell group and two corresponding battery cell units arranged along the first direction in an adjacent battery cell group, and the glue injection hole is arranged corresponding to the center of the cross gap.

3. The battery module according to claim 1, characterized in that: The glue injection hole is a round hole, and the diameter of the glue injection hole is L1, 4mm≤L1≤6mm; or the glue injection hole is a waist-shaped hole.

4. The battery module according to claim 1, characterized in that: The bracket is provided with a groove, the groove extends along the second direction, and the groove is recessed toward the battery cell unit along the third direction, the glue injection hole is provided on the bottom of the groove, and the bottom wall of the groove is at least partially connected to the top of the battery cell unit.

5. The battery module according to claim 4, characterized in that: An accommodating groove is formed between poles of mutually adjacent battery cell units in two adjacent battery cell groups, the groove is arranged in the accommodating groove, and an extension length of the groove along the first direction is less than or equal to an extension length of the accommodating groove along the first direction.

6. The battery module according to claim 4, characterized in that: A connector is provided at the connection between the groove and the battery cell unit, and the connector is used to fix the groove and the battery cell unit.

7. The battery module according to claim 4, characterized in that: An extension length of the groove along the first direction is L2, an extension length of the groove along the second direction is L3, and an extension length of the groove along the third direction is L4, 20mm≤L2≤22mm, 807mm≤L3≤809mm, 3.8mm≤L4≤4.2mm.

8. The battery module according to claim 4, characterized in that: The groove includes a first side wall, a bottom wall and a third side wall which are connected in sequence and arranged at an angle, the first side wall and the third side wall are located on the same side of the bottom wall, the bottom wall corresponds to the bottom of the battery cell unit and is at least partially connected to the top of the battery cell unit, and the glue injection hole is arranged on the bottom wall.

9. The battery module according to claim 8, characterized in that: An included angle between the first side wall and the bottom wall, and an included angle between the third side wall and the bottom wall are both right angles.

10. The battery module according to any one of claims 1 to 9, characterized in that: The second side of the bracket has a receiving portion, and the CCS assembly further includes: A busbar is disposed in the accommodating portion, and the busbar is fixedly connected to the pole of the battery cell unit; A collection component is arranged on the second side surface, and a collection end of the collection component is electrically connected to the bus bar and the battery cell module.

11. The battery module according to claim 10, characterized in that: The bracket is also provided with a positioning portion, which is at least partially protruded from the second side surface and is used to limit the positions of the bus and the collection assembly on the second side surface.

12. A battery pack, characterized in that: The battery pack comprises a battery module as claimed in any one of claims 1 to 11.

Images