Battery module and battery pack

Abstract

The utility model discloses a battery module and a battery pack. The battery module comprises a battery cell group, a first integrated busbar, a first end plate and a first connecting piece; the battery cell group comprises a first side surface and a second side surface which are adjacent and are vertically arranged, the battery cell group comprises a plurality of battery cells arranged along a first direction, pole columns of the battery cells are arranged on the side surfaces, and the side surfaces of the plurality of battery cells are coplanar to form the first side surface; the first integrated busbar is arranged on the first side face and provided with a first through hole penetrating in the first direction. The first end plate is arranged on the second side face and provided with a second through hole penetrating in the first direction, and the second through hole is in butt joint with the first through hole. The first connecting piece penetrates through the first through hole and the second through hole which are in butt joint so as to connect the first end plate and the first integrated busbar. The side plate, the busbar and the sampling assembly are integrated on the integrated busbar, in the assembly process of the battery module before the busbar is welded, the detachable connection between the integrated busbar and the end plate can be realized through the connecting piece, the maintenance is convenient, the assembly difficulty is low, and the production process requirement is low.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field, especially a kind of battery module, battery pack. BACKGROUND

[0002] In recent years, in order to improve the volume utilization of battery pack and the energy density of battery pack, battery large module structure replaces small module structure and CTP (cell to pack) and other technologies quickly become mainstream. As a new battery grouping technology, blade battery is widely recognized and applied in the industry with its unique structure of thin and long and higher energy density advantage, and becomes the grouping solution promoted by each party.

[0003] The existing blade battery large module structure usually has the following two grouping schemes: scheme one is composed of end plate, upper and lower two cover plates, wherein the end plate and the cover plate are fixed together by welding or riveting and other ways. Since the pole of blade battery is arranged at both sides of the battery, busbar and sampling assembly need to be installed on the side face; scheme two is different from scheme one in that one cover plate of the upper and lower two cover plates is replaced by a liquid cooling plate, and the liquid cooling plate and the end plate are also fixed by welding or riveting and other ways. This scheme integrates the liquid cooling plate on the module.

[0004] Both of the above two technical schemes realize the fixed connection of the end plate with the cover plate or the end plate with the liquid cooling plate and the cover plate, and install busbar and sampling assembly on the side face of the battery poles. They are suitable for shorter blade batteries or battery modules with shorter length. Since the end plate is fixedly connected with the cover plate or the end plate with the liquid cooling plate and the cover plate, it is difficult to disassemble the end plate with the cover plate or the end plate with the liquid cooling plate and the cover plate, which is inconvenient for maintenance. Since the poles of blade battery are arranged at both sides of the battery, the welding of aluminum bar and the installation and connection of sampling assembly need to be performed on the side face, which increases the assembly difficulty of battery pack and requires higher production process.

[0005] Therefore, there is an urgent need for a new battery module structure to solve the problems of difficult disassembly and inconvenient maintenance of battery module, high assembly difficulty of battery pack and high production process requirement. UTILITY MODEL CONTENT

[0006] The utility model provides a kind of battery module, and side plate is integrated with busbar and sampling assembly on one component, i.e. integrated busbar, in the assembly process of battery module before welding busbar, and the detachable connection of integrated busbar and end plate can be realized through connecting piece, which is convenient for maintenance, and has low assembly difficulty and low production process requirement.

[0007] In a first aspect, an embodiment of this utility model discloses a battery module, comprising: a cell assembly, the cell assembly including a first side and a second side arranged adjacent to each other, the first side being perpendicular to the second side, the cell assembly including multiple cells arranged along a first direction, the electrode posts of the cells being disposed on the side of the cells, and the side surfaces of the multiple cells arranged along the first direction being coplanar to form the first side; a first integrated busbar disposed on the first side, the first integrated busbar having a first through hole extending along the first direction; a first end plate disposed on the second side, the first end plate having a second through hole extending along the first direction, the second through hole being connected to the first through hole; and a first connector passing through the connected first and second through holes to connect the first end plate and the first integrated busbar.

[0008] The above technical solution achieves a detachable connection between the first integrated busbar and the first end plate through the first connector. Compared to assembling battery modules by welding or riveting, battery modules with detachable connections via the first connector do not require dedicated riveting and welding stations or complex riveting and welding processes. Detachable battery modules are also easier to maintain, with lower assembly difficulty and lower production process requirements. Furthermore, the first connector is accommodated or embedded in the first through-hole of the first integrated busbar, without occupying additional space outside the first integrated busbar.

[0009] Optionally, the battery cell assembly includes a third side and a fourth side arranged adjacent to each other, with the third side perpendicular to the fourth side. The fourth side and the second side are arranged opposite to each other along a first direction, and the third side and the first side are arranged opposite to each other along a second direction, with the second direction perpendicular to the first direction. The battery module also includes a second end plate, which is located on the fourth side. The second end plate has a third through hole that extends along the first direction and is connected to the first through hole. A first connector passes through the connected first through hole, second through hole, and third through hole to connect the first end plate, the first integrated busbar, and the second end plate.

[0010] Optionally, the battery module further includes: a second integrated busbar, which is disposed on the third side and has a fourth through hole extending along the first direction, the fourth through hole being connected to the second through hole and the third through hole; and a second connector, which passes through the connected second through hole, fourth through hole and third through hole to connect the first end plate, the second integrated busbar and the second end plate.

[0011] Optionally, along the second direction, the two end faces of the first integrated busbar are respectively provided with first limiting blocks; along the first direction, the two end faces of the first end plate are respectively provided with first guide grooves; the first limiting blocks cooperate with the first guide grooves for pre-connecting the first integrated busbar and the first end plate; and / or, along the second direction, the two end faces of the second integrated busbar are respectively provided with second limiting blocks; along the first direction, the two end faces of the second end plate are respectively provided with second guide grooves; the second limiting blocks cooperate with the second guide grooves for pre-connecting the second integrated busbar and the second end plate.

[0012] Optionally, the second through hole is a counterbore.

[0013] Optionally, along the first direction, the first end plate is provided with a first rib plate on the side away from the group of battery cells; along the first direction, the second end plate is provided with a second rib plate on the side away from the group of battery cells.

[0014] Optionally, the group of battery cells comprises a top surface and a bottom surface oppositely arranged along the height direction; the group of battery cells further comprises a cover plate, the cover plate is arranged on the top surface, the cover plate is used for being connected with the first end plate and the second end plate, and the cover plate is provided with a weight-reducing hole.

[0015] Optionally, the cover plate is provided with a fifth through hole penetrating the cover plate along the height direction; the first end plate is provided with a sixth through hole on the top surface along the height direction, the sixth through hole is connected with the fifth through hole; the second end plate is provided with a seventh through hole on the top surface along the height direction, the seventh through hole is connected with the fifth through hole; a third connecting piece penetrates the fifth through hole and the sixth through hole to connect the cover plate and the first end plate; a fourth connecting piece penetrates the fifth through hole and the seventh through hole to connect the cover plate and the second end plate.

[0016] Optionally, the battery module further comprises an intermediate end plate, the intermediate end plate is arranged between the first end plate and the second end plate along the first direction, and the intermediate end plate is arranged in parallel with the first end plate and the second end plate; the intermediate end plate is provided with an eighth through hole at two ends along the second direction, the eighth through hole extends along the first direction; a first through hole arranged on the first integrated busbar is connected with the eighth through hole; a fourth through hole arranged on the second integrated busbar is connected with the eighth through hole; the intermediate end plate is provided with a ninth through hole on the top surface along the height direction, the ninth through hole is connected with the fifth through hole; a fifth connecting piece penetrates the connected second through hole, the first through hole and the eighth through hole to connect the first end plate, the first integrated busbar and the intermediate end plate; a sixth connecting piece penetrates the connected third through hole, the first through hole and the eighth through hole to connect the second end plate, the first integrated busbar and the intermediate end plate; a seventh connecting piece penetrates the connected second through hole, the fourth through hole and the eighth through hole to connect the first end plate, the second integrated busbar and the intermediate end plate; an eighth connecting piece penetrates the connected third through hole, the fourth through hole and the eighth through hole to connect the second end plate, the second integrated busbar and the intermediate end plate; a ninth connecting piece penetrates the fifth through hole and the ninth through hole to connect the cover plate and the intermediate end plate.

[0017] Optionally, a plurality of intermediate end plates are arranged, and the distance between each two adjacent intermediate end plates is greater than or equal to 400 mm.

[0018] In a second aspect, the utility model provides a kind of battery pack, comprising the battery module in any one of the preceding first aspect. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 A perspective view of the battery module in the embodiment of the utility model is shown;

[0020] Figure 2 An exploded view of the battery module in an embodiment of this utility model is shown;

[0021] Figure 3 A perspective view of the first integrated busbar in an embodiment of the present invention is shown;

[0022] Figure 4 This invention illustrates the three-dimensional representation of the first end plate in an embodiment of the present invention. Figure 1 ;

[0023] Figure 5 This invention illustrates the three-dimensional representation of the first end plate in an embodiment of the present invention. Figure 2 ;

[0024] Figure 6 A perspective view of the second end plate in an embodiment of the present invention is shown;

[0025] Figure 7 A perspective view of the second integrated busbar in an embodiment of the present invention is shown;

[0026] Figure 8 A perspective view of the cover plate in an embodiment of the present utility model is shown;

[0027] Figure 9 A perspective view of the first insulating base in an embodiment of the present invention is shown;

[0028] Figure 10 A perspective view of a battery module according to another embodiment of the present invention is shown;

[0029] Figure 11 An exploded view of a battery module according to another embodiment of the present invention is shown;

[0030] Figure 12 This invention illustrates a three-dimensional representation of the intermediate end plate in another embodiment of the present invention. Figure 1 ;

[0031] Figure 13 This invention illustrates a three-dimensional representation of the intermediate end plate in another embodiment of the present invention. Figure 2 . Detailed Implementation

[0032] The following describes the embodiments of the utility model with specific examples, and those skilled in the art can easily understand other advantages and effects of the utility model from the disclosure of the specification. Although the description of the utility model will be introduced together with the preferred embodiments, this does not mean that the features of the utility model are limited to the embodiments. On the contrary, the purpose of introducing the utility model with the embodiments is to cover other options or modifications that can be extended based on the claims of the utility model. In order to provide a deep understanding of the utility model, many specific details will be included in the following description. The utility model can also be implemented without using these details. In addition, in order to avoid confusion or obscure the focus of the utility model, some specific details will be omitted in the description. It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict.

[0033] It should be noted that in the specification, similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0034] The terms "first", "second", and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0035] In the description of the embodiments, it should also be noted that unless otherwise explicitly specified and limited, the terms "set", "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments can be understood according to the specific circumstances.

[0036] In order to make the purpose, technical scheme and advantages of the utility model more clear, the embodiments of the utility model will be further described in detail below with reference to the drawings.

[0037] Reference Figure 1 And Figure 2 The utility model provides a kind of battery module 100.Reference Figure 2 Battery module 100 includes electric core group 101, first integrated female bank 5, first end plate 2 and first connecting piece 71.

[0038] Reference Figure 1 Electric core group 101 includes first side surface 1011 and second side surface 1012 arranged adjacent, and first side surface 1011 is arranged perpendicular to second side surface 1012.Electric core group 101 includes a plurality of electric cores 1, and a plurality of electric cores 1 are along the first direction (i.e. Figure 2The pole of the electric core 1 is arranged on the side surface of the electric core 1, and the side surfaces of the plurality of electric cores 1 arranged along the first direction (the X direction shown in the figure) are coplanar to form a first side surface 1011.

[0039] With reference to Figure 3 , the first integrated busbar 5 is arranged on the first side surface 1011. Figure 5 With reference to Figure 2 , the first integrated busbar 5 is provided with a first through hole 521 penetrating along the first direction (for example, the X direction shown in the figure).

[0040] With reference to Figure 4 , the first end plate 2 is arranged on the second side surface 1012. Figure 4 With reference to Figure 2 , the first end plate 2 is provided with a second through hole 215 penetrating along the first direction (for example, the X direction shown in the figure), and the second through hole 215 is in butt joint with the first through hole 521.

[0041] With reference to Figure 3 , in combination with Figure 4 and Figure 2 , the first connecting piece 71 penetrates the butt-jointed first through hole 521 and second through hole 215 to connect the first end plate 2 and the first integrated busbar 5.

[0042] In the utility model, the integrated busbar, namely, the CCS (Cells Contact System), is a kind of assembly playing a key role in battery module.The integrated busbar integrates the side plate, busbar and sampling assembly and other components of battery module, and these components are connected into a whole by special process, so that high-voltage series-parallel connection of electric core and temperature sampling and electric core voltage sampling functions of battery are realized.

[0043] By the above technical scheme, the first integrated busbar 5 and the first end plate 2 are detachably connected by the first connecting piece 71.Compared with the battery module assembled by welding or riveting in the prior art, the battery module 100 detachably connected by the first connecting piece 71 does not need special riveting and welding station and complex riveting and welding process, and the battery module 100 detachably connected is also convenient for maintenance, and the assembly difficulty is low and the production process requirement is low.Meanwhile, the first connecting piece 71 is contained or embedded in the first through hole 521 in the first integrated busbar 5, and does not occupy extra space outside the first integrated busbar 5, specifically, does not occupy the space of the first integrated busbar 5 in the Y direction shown in the second direction. Figure 2

[0044] When the size of blade battery is long or when the module is long and heavy, the structural strength of the battery module 100 is low.The utility model sets the first integrated busbar 5 along the first direction (for example, the X direction shown in the figure) in the first integrated busbar 5, so that the first integrated busbar 5 is arranged along the first direction (for example, the X direction shown in the figure) and the second direction (for example, the Y direction shown in the figure), and the structural strength of the battery module 100 is improved. Figure 2 ​The first connector 71, extending in the X direction (as shown), connects the first integrated busbar 5 and the first end plate 2, enabling connection in the first direction (e.g., X-direction). Figure 2 The forces on the battery module 100, which has a relatively long length, are distributed in the X direction (as shown), thereby enhancing the structural strength of the battery module 100.

[0045] In addition, the battery module 100 can select a first connector 71 and a first integrated busbar 5 of appropriate length according to the number of battery cells 1 or the different length dimensions of the battery module 100, which has high compatibility.

[0046] In some possible embodiments provided by this utility model, reference is made to Figure 3 Cell 1 is a blade battery, with terminals located on both sides of the cell. Specifically, the terminals are located on both sides along the second direction Y, which are the first side 1011 and the third side 1013 of the battery module 100, rather than on both sides along the third direction, which is the height direction Z, which are the top and bottom sides of the battery module 100.

[0047] refer to Figure 3 The first integrated busbar 5 comprises a first signal acquisition component 51, a first tray 52, a first busbar 53, and a second busbar 54.

[0048] By integrating the side panel, busbar, and sampling component of the existing battery module into a single component, namely the first integrated busbar 5, the number of parts in the battery module 100 is reduced. Compared to the solution using a separate side panel, the weight of the battery module 100 is also reduced. In the assembly process of the battery module before welding the busbar, integrating the busbar and sampling component onto the first integrated busbar 5 allows the first integrated busbar 5 to be directly mounted to the side of the blade battery module, simplifying assembly and enhancing the structural strength of the battery module 100.

[0049] refer to Figure 3 The first signal acquisition component 51 is mainly responsible for sampling the battery temperature and battery voltage. The first signal acquisition component 51, the first bus 53, and the second bus 54 are connected into a whole by means of snap-fit ​​or riveting, that is, the first signal acquisition component 51, the first bus 53, and the second bus 54 are integrated.

[0050] refer to Figure 9 The first bus 53 and the second bus 54 are used for high-voltage connection between batteries. The second bus 54 is the module output bus, and it has a through hole 541 for connection with the first insulating base 12 (e.g., Figure 2 (As shown) Install and fix it.

[0051] The first tray 52 is made of plastic material, which is insulating and flame-retardant. The first tray 52 is provided with a first through hole 521 extending along the first direction, i.e. the X direction shown in the figure, which is used for the first connecting piece 71 to pass through. Figure 3 The first connecting piece 71 passes through the first through hole 521.

[0052] In some possible embodiments, the first tray 52 is provided with one first through hole 521.

[0053] In some possible embodiments, the one first through hole 521 is arranged at the middle position of the first tray 52 along the third direction, i.e. the Z direction. When the first connecting piece 71 connects the first integrated busbar 5 and the first end plate 2 through the first through hole 521, a fastening force can be applied at the middle position of the first integrated busbar 5 and the first end plate 2 along the third direction Z direction, so that the two are stably connected and mounted. Correspondingly, the first end plate 2 is provided with a second through hole 215 extending along the first direction, i.e. the X direction. The second through hole 215 is provided with one, which is arranged at the middle position of the end plate body 21 along the third direction, i.e. the Z direction, and can be connected with the only one first through hole 521 of the first integrated busbar 5, so as to realize the connection between the first integrated busbar 5 and the first end plate 2.

[0054] In other possible embodiments, the first tray 52 is provided with at least two first through holes 521. For example, referring to Figure 4 , the first tray 52 is provided with two first through holes 521 along the third direction, i.e. the Z direction shown in the figure (i.e. the vertical direction or the height direction in this embodiment). Specifically, the first tray 52 is provided with first through holes 521 on the upper and lower sides along the third direction, i.e. the Z direction, for the first connecting piece 71 to pass through. Correspondingly, the first end plate 2 is provided with a second through hole 215 extending along the first direction, i.e. the X direction. The second through hole 215 is provided with at least two, which are arranged on the upper and lower sides of the end plate body 21 along the third direction, i.e. the Z direction, and can be connected with the at least two first through holes 521 of the first integrated busbar 5, so as to realize the connection between the first integrated busbar 5 and the first end plate 2. For example, as shown in Figure 5 and Figure 2 , the second through hole 215 is arranged around the end plate body 21. When the first connecting piece 71 connects the first integrated busbar 5 and the first end plate 2 through the first through hole 521, a fastening force can be applied on the upper and lower sides of the first integrated busbar 5 and the first end plate 2 along the third direction Z direction, so that the two are stably connected and mounted.

[0055] In the utility model, referring to Figure 4 , the first connecting piece 71 is a long bolt. For example, the long bolt is a hexagonal flange bolt.

[0056] In some possible embodiments of the utility model, referring toFigure 5 and Figure 4 The first end plate 2 is a die casting.

[0057] In some possible embodiments, the first end plate 2 is composed of an end plate body 21 and a mounting bracket 22.

[0058] The end plate body 21 is provided with two side surfaces, i.e., a fifth side surface 201 and a sixth side surface 202, along a first direction, i.e., the X direction. Figure 2 In combination with Figure 5 The fifth side surface 201 is a side surface of the end plate body 21 in the X1 direction, and is also a side surface of the end plate body 21 that faces away from the battery cell group 101. Referring to Figure 2 In combination with Figure 9 The sixth side surface 202 is a side surface of the end plate body 21 in the X2 direction, and is also a side surface of the end plate body 21 that is close to the battery cell group 101, and is also a side surface that cooperates with the battery cell group 101. Above the sixth side surface 202 of the end plate body 21 along a third direction, i.e., a height direction, i.e., the Z direction shown in the figure, a base mounting groove 214 is provided, which is used to mount a first insulating base 12 as shown. Figure 4 The two sides of the base mounting groove 214 are provided with guide limiting grooves 2141, which can guide the first insulating base 12 to be mounted on the sixth side surface 202.

[0059] In some possible embodiments, referring to Figure 4 The fifth side surface 201 of the end plate body 21 is also provided with a positioning hole 217, which facilitates cooperation with a module stacking tool. A plurality of positioning holes 217 are provided along a second direction, i.e., the Y direction, and the plurality of positioning holes 217 are uniformly and evenly distributed, so that the module stacking tool can stably apply a pressing force to the battery module corresponding to the first end plate 2, so that the first end plate 2 is uniformly stressed everywhere, preventing the first end plate 2 from tilting during the pressing process due to uneven stress, so that the battery module is subjected to different pressing forces everywhere, and ensuring that the battery module meets the preset module strength standard.

[0060] In some possible embodiments, the second through hole 215 is a counterbore. Exemplarily, the first connecting piece 71 is a long bolt. When the first connecting piece 71 connects the first end plate 2 and the first integrated busbar 5, the head of the first connecting piece 71 can be immersed in the counterbore and will not protrude from the end plate body 21 along the direction X1, which not only avoids scratching other components in the battery pack or installation and maintenance personnel, but also has an aesthetic effect.

[0061] In some possible embodiments, referring to Figure 4 The upper surface of the end plate body 21 along the third direction, i.e., the Z direction shown in the figure, is provided with a signal acquisition assembly mounting hole 212, which is used to fix a first signal acquisition assembly 51.

[0062] In some possible embodiments, referring toFigure 4 The mounting bracket 22 of the first end plate 2 is provided with bolt mounting holes 221 for fixing the battery module 100 to the side beam of the box.

[0063] In some possible embodiments, reference Figure 2 The mounting bracket 22 is also provided with positioning pin holes 222 for the installation and positioning of the battery module 100 and the lifting of the battery module 100.

[0064] In some possible embodiments provided by this utility model, reference continues to be made. Figure 2 The battery cell assembly 101 includes a third side 1013 and a fourth side 1014 disposed adjacent to each other. The third side 1013 is disposed perpendicular to the fourth side 1014. The fourth side 1014 and the second side 1012 are aligned along a first direction (e.g., ...). Figure 2 The third side 1013 is positioned relative to the first side 1011 along the second direction (as shown in the X direction). Figure 1 The fourth side 1014 is parallel to the second side 1012, and the third side 1013 is parallel to the first side 1011. The second direction (as shown in the Y direction) is relatively arranged. Figure 2 and Figure 1 The Y direction shown is perpendicular to the first direction (e.g., Figure 2 and Figure 2 (The X direction is shown).

[0065] Continue to refer to Figure 6 and Figure 2 The battery module 100 also includes a second end plate 11, which is disposed on the fourth side 1014. The second end plate 11 has a distribution along a first direction (e.g., Figures 2 to 6 A third through hole (not shown in the figure) extends through the X direction and mates with the first through hole 521.

[0066] Continue to refer to Figure 6 The first connector 71 passes through the first through hole 521, the second through hole 215 and the third through hole (not shown in the figure) to connect the first end plate 2, the first integrated busbar 5 and the second end plate 11.

[0067] Using the above technical solution, the first connector 71 sequentially passes through the second through hole of the first end plate 2, the first through hole 521 of the first integrated busbar 5, and the third through hole of the second end plate 11, connecting the first end plate 2, the first integrated busbar 5, and the second end plate 11. This connection method reduces the number of connectors and enables a detachable connection between the first end plate 2, the first integrated busbar 5, and the second end plate 11, improving installation and maintenance efficiency. Furthermore, by connecting the first end plate 2, the first integrated busbar 5, and the second end plate 11 through the first connector 71, the battery module 100 has high structural strength.

[0068] In some other possible embodiments provided by the utility model, the second end plate 11 is similar to the first end plate 2 and is also a die casting, which also plays the role of installation limiting and fixing of the battery cell group 101.

[0069] In some possible embodiments, referring to Figure 2 The second end plate 11 is also provided with a steel wire sleeve 111 for fixing the connecting piece 7 (the first connecting piece 71 and the second connecting piece 72).

[0070] Referring to Figure 7 And Figure 7 The battery module 100 also comprises a second integrated busbar 10 and a second connecting piece 72. The second integrated busbar 10 is arranged on the third side surface 1013 of the battery cell group 101. The second integrated busbar 10 is provided with a fourth through hole 104 penetrating in the first direction, i.e. the X direction. The fourth through hole 104 is connected with the second through hole 215 and the third through hole (not shown in the figure).

[0071] The second connecting piece 72 penetrates the connected second through hole 215, fourth through hole 104 and third through hole (not shown in the figure) to connect the first end plate 2, second integrated busbar 10 and second end plate 11.

[0072] In this embodiment, the second connecting piece 72 is the same in structure as the first connecting piece 71, and both are connecting pieces 7. Exemplarily, the connecting piece 7 is a long bolt.

[0073] In some other possible embodiments provided by the utility model, referring to Figure 1 The second integrated busbar 10 is similar in structure to the first integrated busbar 5 and is composed of a second signal acquisition assembly 101, a second tray 102 and a third busbar 103.

[0074] In this embodiment, referring to Figure 2 And Figures 3 to 7 The first end plate 2, first integrated busbar 5, second end plate 11 and second integrated busbar 10 are connected in sequence to enclose the four side surfaces of the battery cell group 101 arranged in a cuboid, which has good stability for the battery cell group 101 and can also withstand large battery cell cyclic expansion force. In addition, the connection of the first end plate 2, first integrated busbar 5, second end plate 11 and second integrated busbar 10 is realized through the first connecting piece 71 and the second connecting piece 72, which has less connecting pieces, simple and quick connecting mode, and the connecting mode belongs to detachable connection, which is convenient for installation and maintenance; the battery module 100 connected in this mode also has high structural strength.

[0075] In some possible embodiments, referring to Figures 3 to 5In the second direction, i.e. the Y direction, two end faces of the first integrated busbar 5 are respectively provided with first limiting blocks 522. In the first direction, i.e. the X direction, two end faces of the first end plate 2 are respectively provided with first guide grooves 211. The first limiting blocks 522 and the first guide grooves 211 are matched to pre-connect the first integrated busbar 5 and the first end plate 2. And / or, in the second direction, i.e. the Y direction, two end faces of the second integrated busbar 10 are respectively provided with second limiting blocks 105. In the first direction, i.e. the X direction, two end faces of the second end plate 11 are respectively provided with second guide grooves 114. The second limiting blocks 105 and the second guide grooves 114 are matched to pre-connect the second integrated busbar 10 and the second end plate 11.

[0076] In some possible embodiments of the utility model, with reference to Figure 6 The first integrated busbar 5 is provided with the first limiting blocks 522, and the first end plate 2 is provided with the first guide grooves 211. Exemplarily, the first integrated busbar 5 includes a first tray 52. The first tray 52 is provided with the limiting blocks 522 on both sides in the first direction, i.e. the X direction shown in the figure, and the end plate body 21 is provided with the mounting guide grooves 211 matched with the first integrated busbar 5 on the side matched with the battery cell group 101. The limiting blocks 522 on the first tray 52 are matched with the mounting guide grooves 211 on the first end plate 2 respectively, so that the first integrated busbar 5 and the first end plate 2 are pre-connected, thereby realizing the butt joint of the first through hole 521 and the second through hole 215.

[0077] That is to say, the first integrated busbar 5 and the first end plate 2 are pre-connected through the first limiting blocks 522 and the first guide grooves 211 first, and then the first connecting piece 71 is passed through the first through hole 521 and the second through hole 215 to realize the fixed connection of the two. In the embodiment, the two components are pre-connected first, so that the first through hole 521 and the second through hole 215 are butt jointed, and the first connecting piece 71 is more smooth and coherent when passing through the first through hole 521 and the second through hole 215, which makes the connection of the first integrated busbar 5 and the first end plate 2 more convenient.

[0078] In some possible embodiments, with reference to Figure 7 And Figures 3 to 7 The second integrated busbar 10 is provided with the second limiting blocks 105, and the second end plate 11 is provided with the second guide grooves 114. That is to say, the second integrated busbar 10 and the second end plate 11 are pre-connected through the second limiting blocks 105 and the second guide grooves 114 first, so that the fourth through hole 104 and the third through hole are butt jointed, so that the second connecting piece 72 passes through the fourth through hole 104 and the third through hole more smoothly and coherently, and the fixed connection of the second integrated busbar 10 and the second end plate 11 is completed.

[0079] In other possible embodiments, with reference to Figure 2The first integrated busbar is provided with a first limiting block 522, the first end plate 2 is provided with a first guide groove 211, and the second integrated busbar 10 is provided with a second limiting block 105, and the second end plate 11 is provided with a second guide groove 114. That is, the first integrated busbar 5 and the first end plate 2 and the second end plate 11 are first connected by the first limiting block 522 and the first guide groove 211 and the second guide groove 114, and then the second integrated busbar 10 and the first end plate 2 and the second end plate 11 are connected by the second limiting block 105 and the first guide groove 211 and the second guide groove 114, and then the first connecting piece 71 is inserted into the second through hole 215, the first through hole 521 and the third through hole which have been connected by the pre-connection, so as to realize the fixed connection of the first end plate 2, the first integrated busbar 5 and the second end plate 11; the second connecting piece 72 is inserted into the second through hole 215, the fourth through hole 104 and the third through hole which have been connected by the pre-connection, so as to realize the fixed connection of the first end plate 2, the second integrated busbar 10 and the second end plate 11. The corresponding components are first connected, and then the through holes on the end plate and the integrated busbar are connected, and then the first connecting piece 71 and the second connecting piece 72 are connected through the pre-connection components, so that the connection is more convenient.

[0080] In some possible embodiments of the present application, as shown in Figure 4 , Figure 6 and Figure 1 , the first end plate 2 is provided with a first rib plate 216 on the side away from the battery cell group 101 along the first direction, i.e. the X direction. Figure 2 and Figure 4 , the second end plate 11 is provided with a second rib plate 113 on the side away from the battery cell group 101 along the first direction, i.e. the X direction.

[0081] Exemplarily, as shown in Figure 7 , the first end plate 2 is provided with a first rib plate 216 on the fifth side surface 201. The first rib plate 216 is a horizontal and vertical plate protruding towards the X1 direction along the first direction on the first end plate 2, which is used to improve the strength of the first end plate 2. As shown in Figure 1 , the second rib plate 113 is a horizontal and vertical plate protruding towards the X2 direction along the first direction on the second end plate 11, which is used to improve the strength of the second end plate 11. In the present embodiment, the structure of the second rib plate 113 on the second end plate 11 is the same as that of the first rib plate 216.

[0082] In some possible embodiments of the present application, as shown in Figure 2 , Figure 8 and Figure 8 , the battery cell group 101 includes a top surface and a bottom surface arranged opposite along the height direction, i.e. the Z direction (also referred to as the third direction in the present application). The battery module 100 further includes a cover plate 8. The cover plate 8 is arranged on the top surface and is used to connect with the first end plate 2 and the second end plate 11.

[0083] In some possible embodiments, referring to Figure 8 The cover plate 8 is provided with a weight-reducing hole for reducing the self weight of the cover plate 8.

[0084] In some other possible embodiments, referring to Figure 4 The cover plate 8 is provided with a fifth through hole 81. The fifth through hole 81 penetrates the cover plate 8 along the height direction, i.e., the Z direction. Referring to Figure 6 The first end plate 2 is provided with a sixth through hole 213 on the top surface along the height direction, i.e., the Z direction. The sixth through hole 213 is in butt joint with the fifth through hole 81. Referring to Figure 2 The second end plate 11 is provided with a seventh through hole 112 on the top surface along the height direction, i.e., the Z direction. The seventh through hole 112 is in butt joint with the fifth through hole 81. Referring to Figures 2 to 9 The third connecting piece 91 penetrates the fifth through hole 81 and the sixth through hole 213 to connect the cover plate 8 and the first end plate 2. The fourth connecting piece 92 penetrates the fifth through hole 81 and the seventh through hole to connect the cover plate 8 and the second end plate 11.

[0085] That is, the end plate body 21 of the first end plate 2 is provided with the sixth through hole 213 on the upper surface along the height direction, i.e., the Z direction. The first end plate 2 is fixedly installed with the cover plate 8 through the third connecting piece 91. The second end plate 11 is provided with the seventh through hole 112 on the upper surface along the height direction, i.e., the Z direction, i.e., the third direction. The second end plate 11 is fixedly installed with the cover plate 8 through the fourth connecting piece 92.

[0086] In the present embodiment, the third connecting piece 91 and the fourth connecting piece 92 are the same connecting piece 9. Exemplarily, the connecting piece 9 is a self-plugging rivet for fixedly connecting the cover plate 8, the first end plate 2 and the second end plate 11.

[0087] By using the above technical solution, the first end plate 2, the first integrated busbar 5, the second end plate 11 and the second integrated busbar 10 are connected through the connecting piece 7, i.e., the first connecting piece 71 and the second connecting piece 72. Meanwhile, the cover plate 8 above the battery module 100 is riveted and fixed with the first end plate 2 and the second end plate 11 through the connecting piece 9, i.e., the third connecting piece 91 and the fourth connecting piece 92. Therefore, the battery module 100 has high structural strength, meets the use under strict working conditions and can withstand large cell cyclic expansion force.

[0088] In some possible embodiments, the cover plate 8 is a sheet metal structure, the surface of which is subjected to insulation treatment and is bonded to the top surface of the cell group 101 through structural adhesive.

[0089] Referring to Figures 2 to 9The utility model provides a battery module 100, including electric core 1, first end plate 2, insulating sheet 3, heat insulation pad 4, first integrated female 5, first insulating protective cover 6, connecting piece 7 (first connecting piece 71 and second connecting piece 72), apron 8, connecting piece 9 (third connecting piece 91 and fourth connecting piece 92), second integrated female 10, second end plate 11, first insulating base 12, second insulating protective cover 13 and second insulating base 14 etc.

[0090] Reference Figure 2 The utility model provides a battery module 100's specific assembly process is: first insulating base 12 is installed through the cooperation of guiding block 122 with the guiding limit groove 2141 on first end plate 2, realizes the installation of first insulating base 12 on first end plate 2. Then first end plate 2 is bonded with insulating sheet 3 and is ready for use. Similarly, second insulating base 14 is installed on second end plate 11, and then second end plate 11 is bonded with insulating sheet 3 and is ready for use.

[0091] Between adjacent electric core 1 bonding heat insulation pad 4, in turn, complete the assembly of electric core group 101.

[0092] The combination of first end plate 2 and first insulating base 12 is bonded with the second side 1012 of electric core group 101, and the combination of second end plate 11 and second insulating base 14 is bonded on the fourth side 1014 of electric core group 101.

[0093] Then, first integrated female 5 is installed on the first side 1011 of electric core group 101, and second integrated female 10 is installed on the third side 1013 of electric core group 101. That is, through first limiting block 522, first guide groove 211, second limiting block 105, second guide groove 114, the pre-connection of first end plate 2, first integrated female 5, second end plate 11 and second integrated female 10 is realized.

[0094] After pre-installation, first end plate 2, first integrated female 5 and second end plate 11 are connected and fixed by first connecting piece 71. Specifically, first connecting piece 71 passes through first end plate 2, first integrated female 5 and second end plate 11 in turn, is tightly connected with steel wire screw sleeve 111 arranged in the third through hole of second end plate 11, and the head of first connecting piece 71 sinks into the first through hole 521 of first end plate 2. Similarly, first end plate 2, second integrated female 10 and second end plate 11 are connected and fixed by second connecting piece 72.

[0095] After the above assembly is completed, the welding of busbar is carried out. It includes the welding of first busbar 53 and second busbar 54 on first integrated female 5, and the welding of third busbar 103 on second integrated female 10.

[0096] Then, the cover plate 8 is installed on the first end plate 2 and the second end plate 11 through the third connecting piece 91 and the fourth connecting piece 92.

[0097] Finally, the first insulation protection cover 6 is installed on the outer side of the first integrated busbar 5, i.e. Figure 2 the side in the Y1 direction shown, and the second insulation protection cover 13 is installed on the outer side of the second integrated busbar 10, i.e. Figures 10 to 12 the side in the Y2 direction shown.

[0098] At this time, the installation of the entire battery module 100 is completed.

[0099] With reference to Figure 12 , the utility model provides a kind of battery module 200, and battery module 200 further include intermediate end plate 15.It is between first end plate 2 and second end plate 11 along first direction, i.e.X direction, and intermediate end plate 15 is arranged in parallel with first end plate 2, second end plate 11.

[0100] With reference to Figure 13 And Figure 11 And in combination Figure 12 , the both ends of intermediate end plate 15 along second direction, i.e.Y direction, are provided with eighth through hole 151, and eighth through hole 151 extends along first direction, i.e.X direction.The first through hole 521 of first integrated busbar 5 is connected with eighth through hole 151.The fourth through hole 104 of second integrated busbar 10 is connected with eighth through hole 151.

[0101] Intermediate end plate 15 is provided with ninth through hole 152 on top surface along height direction, i.e.Z direction, and ninth through hole 152 is connected with fifth through hole 81 provided on cover plate 8.

[0102] Fifth connecting piece 75 is connected with second through hole 215, first through hole 521 and eighth through hole 151 to connect first end plate 2, first integrated busbar 5 and intermediate end plate 15.Sixth connecting piece 76 is connected with third through hole, first through hole 521 and eighth through hole 151 to connect second end plate 11, first integrated busbar 5 and intermediate end plate 15.Seventh connecting piece 77 is connected with second through hole 215, fourth through hole 104 and eighth through hole 151 to connect first end plate 2, second integrated busbar 10 and intermediate end plate 15.Eighth connecting piece 78 is connected with third through hole, fourth through hole 104 and eighth through hole 151 to connect second end plate 11, second integrated busbar 10 and intermediate end plate 15.Ninth connecting piece 93 is connected with fifth through hole 81 and ninth through hole 152 to connect cover plate 8 and intermediate end plate 15.

[0103] With reference to Figure 13 And Figure 12In some possible embodiments provided by the utility model, the intermediate end plate 15 is further provided with a weight reduction groove 153 for reducing the weight of the intermediate end plate 15. The weight reduction groove 153 comprises a first weight reduction groove 1531, a second weight reduction groove 1532 and a third weight reduction groove 1533.

[0104] In the embodiment, with reference to Figure 13 and Figure 12 , the first weight reduction groove 1531, the second weight reduction groove 1532 and the third weight reduction groove 1533 are all rectangular structures. The shape, size, position, number and specific setting form of the weight reduction groove 153 can be set according to actual needs, and the utility model does not limit this.

[0105] Further, with reference to Figure 13 and Figure 10 , the intermediate end plate 15 is respectively provided with one end 1501 and the other end 1502 along the second direction, i.e. the Y direction. The one end 1501 is provided with a first connecting part 1551, and the other end 1502 is provided with a second connecting part 1552. The first connecting part 1551 and the second connecting part 1552 are both provided with an eighth through hole 151 along the first direction, i.e. the X direction. The eighth through hole 151 in the second connecting part 1552 is used for abutting with the fourth through hole 104 provided on the second integrated busbar 10, so as to connect the intermediate end plate 15 and the second integrated busbar 10. The eighth through hole 151 in the first connecting part 1551 is used for abutting with the first through hole 521 provided on the first integrated busbar 5, so as to connect the intermediate end plate 15 and the first integrated busbar 5.

[0106] In the embodiment, the height H1 of the first connecting part 1551 along the third direction, i.e. the Z direction, is lower than the height H2 of the second connecting part 1552 along the third direction, i.e. the Z direction.

[0107] Correspondingly, with reference to Figure 11 and Figure 2 , the second integrated busbar 10 connected with the second connecting part 1552 is provided with a hollow part one, and meanwhile, the second insulation protective cover 13 provided on the side of the second integrated busbar 10 away from the battery module is provided with a hollow part two 1553. The shape of the hollow part one is the same as that of the hollow part two 1553, and both are shaped according to the shape of the second connecting part 1552. Similarly, the first integrated busbar 5 connected with the first connecting part 1551 is provided with a hollow part three, and meanwhile, the first insulation protective cover 6 provided on the side of the first integrated busbar 5 away from the battery module is provided with a hollow part four. The shape of the hollow part three is the same as that of the hollow part four, and both are shaped according to the shape of the first connecting part 1551.

[0108] In this embodiment, the second connecting portion 1552 is configured with an irregular structure, and the second integrated busbar 10 has a cutout portion that mimics the shape of the second connecting portion 1552. This is to physically separate the second integrated busbar 10 and achieve a reasonable layout and design for connecting multiple cells in the battery module in series. The different shapes and structures of the first connecting portion 1551 and the second connecting portion 1552 also take into account the need for a reasonable layout and design for connecting multiple cells in the battery module in series.

[0109] In some other possible embodiments provided by this utility model, when the battery module includes multiple intermediate end plates 15, each pair of adjacent intermediate end plates 15 are staggered. Specifically, one end 1501 of one intermediate end plate 15 and the other end 1502 of the other intermediate end plate 15 are arranged opposite each other along the first direction, namely the X direction.

[0110] For example, when the battery module includes four intermediate end plates 15, along the arrangement direction of the intermediate end plates 15, i.e., along the first direction X, on one side of the battery module (refer to...). Figure 2 The third side (1013) of the battery cell assembly 101 shown in the figure has one end 1501 of the first intermediate end plate 15, the other end 1502 of the second intermediate end plate 15, one end 1501 of the third intermediate end plate 15, and the other end 1502 of the fourth intermediate end plate 15 arranged opposite to each other. A second integrated busbar arranged on this side of the battery module is connected to one end 1501 of the first intermediate end plate 15, the other end 1502 of the second intermediate end plate 15, one end 1501 of the third intermediate end plate 15, and the other end 1502 of the fourth intermediate end plate 15, respectively.

[0111] Correspondingly, on the other side opposite to this side of the battery module (see reference) Figure 12 The first side 1011 of the battery cell assembly 101 shown in the figure has the other end 1502 of the first intermediate end plate 15, one end 1501 of the second intermediate end plate 15, the other end 1502 of the third intermediate end plate 15, and one end 1501 of the fourth intermediate end plate 15 arranged opposite to each other. That is, the first integrated busbar 5 located on the other side of the battery module is connected to the other end 1502 of the first intermediate end plate 15, one end 1501 of the second intermediate end plate 15, the other end 1502 of the third intermediate end plate 15, and one end 1501 of the fourth intermediate end plate 15, respectively.

[0112] refer to Figure 12 In some possible embodiments provided by the utility model, a wire threaded sleeve 1511 is also provided in the eighth through hole 151 on the intermediate end plate 15 for fixing the connectors 7 (the fifth connector 75, the sixth connector 76, the seventh connector 77, and the eighth connector 78). (See reference) Figure 10 and combined Figure 2At two ends of the intermediate end plate 15 in the second direction, i.e., the Y direction, bolt mounting holes 154 are arranged, which are used for fixing the battery module 200 on the box side beam.

[0113] By adopting the technical scheme, the intermediate end plate 15 is arranged in the battery module 100. Especially for the battery module 100 with a relatively long size, the arrangement of the intermediate end plate 15 can effectively disperse the stress of the long battery module 100 and effectively enhance the structural strength of the battery module 100. By arranging the intermediate end plate 15 and providing a long bolt with a size suitable for the battery module provided with the intermediate end plate 15, the compatibility of the battery module 100 is improved.

[0114] In some other possible embodiments of the utility model, the intermediate end plate is provided with a plurality of intermediate end plates, and the distance between every two adjacent intermediate end plates is greater than or equal to 400 mm. The intermediate end plates are arranged at the aforementioned distance, so that the battery module 100 has better structural strength.

[0115] In some possible embodiments of the utility model, referring to Figure 2 , the battery module 100 comprises an insulating sheet 3. The insulating sheet 3 is a plastic part and has insulation and flame retardation. The insulating sheet 3 is double-sidedly glued, one side is bonded to the first end plate 2, and the other side is bonded to the side surface of the battery cell 1.

[0116] In some possible embodiments of the utility model, referring to Figure 2 , the battery module 100 comprises a heat insulation pad 4. The main component of the heat insulation pad 4 is aerogel, which is also double-sidedly glued and bonded between adjacent battery cells 1 to prevent heat diffusion between the battery cells 1.

[0117] In some possible embodiments of the utility model, referring to Figure 2 , the battery module 100 further comprises a first insulating protective cover 6. The first insulating protective cover 6 is a plastic part and has insulation and flame retardation, and plays an insulating protective role on the first integrated busbar 5.

[0118] In some possible embodiments of the utility model, referring to Figure 9 , the battery module 100 further comprises a second insulating protective cover 13. The second insulating protective cover 13 is similar to the first insulating protective cover 6, is a plastic part and has insulation and flame retardation, and plays an insulating protective role on the second integrated busbar 10.

[0119] In some possible embodiments of the utility model, referring to Figure 2The battery module 100 further comprises a first insulating base 12, which is a plastic member with insulating and flame-retardant properties, and is provided with an inlaid nut 121 and a guide block 122.

[0120] With reference to ​ The second insulating base 14 is similar to the first insulating base 12, and is also a plastic member with insulating and flame-retardant properties, and is used to be fixed with the second busbar 54 and the second end plate 11.

[0121] In the second aspect, the utility model provides a kind of battery pack, including the battery module 100 as any one of preceding first aspect in embodiment.

[0122] Although the utility model has been illustrated and described with reference to certain preferred embodiments thereof, it should be understood that the above description is a further detailed explanation of the utility model in conjunction with specific embodiments, and the specific implementation of the utility model cannot be limited to these descriptions. Those skilled in the art can make various changes in form and details, including making a number of simple inferences or substitutions, without departing from the spirit and scope of the utility model.

Claims

1. A battery module, characterized by, The battery module comprises: a battery cell group comprising a first side and a second side arranged adjacently, the first side being arranged perpendicularly to the second side, the battery cell group comprising a plurality of battery cells arranged along a first direction, the poles of the battery cells being arranged on the side of the battery cells, the sides of the plurality of battery cells arranged along the first direction being coplanar to form the first side; a first integrated busbar arranged on the first side, the first integrated busbar being provided with a first through hole penetrating along the first direction; a first end plate arranged on the second side, the first end plate being provided with a second through hole penetrating along the first direction, the second through hole being in butt joint with the first through hole; a first connecting piece penetrating the first through hole and the second through hole in butt joint to connect the first end plate and the first integrated busbar.

2. The battery module according to claim 1, wherein: the battery cell group comprises a third side and a fourth side arranged adjacently, the third side being arranged perpendicularly to the fourth side, wherein the fourth side is arranged opposite to the second side along the first direction, and the third side is arranged opposite to the first side along a second direction, the second direction being perpendicular to the first direction; the battery module further comprises a second end plate arranged on the fourth side, the second end plate being provided with a third through hole penetrating along the first direction, the third through hole being in butt joint with the first through hole; the first connecting piece penetrates the first through hole, the second through hole and the third through hole in butt joint to connect the first end plate, the first integrated busbar and the second end plate.

3. The battery module of claim 2, wherein, The battery module further comprises: a second integrated busbar arranged on the third side, the second integrated busbar being provided with a fourth through hole penetrating along the first direction, the fourth through hole being in butt joint with the second through hole and the third through hole; a second connecting piece penetrating the second through hole, the fourth through hole and the third through hole in butt joint to connect the first end plate, the second integrated busbar and the second end plate.

4. The battery module according to claim 3, wherein: along the second direction, two end faces of the first integrated busbar are respectively provided with first limiting blocks; along the first direction, two end faces of the first end plate are respectively provided with first guide grooves; the first limiting blocks and the first guide grooves are matched to pre-connect the first integrated busbar and the first end plate; and / or along the second direction, two end faces of the second integrated busbar are respectively provided with second limiting blocks; along the first direction, two end faces of the second end plate are respectively provided with second guide grooves; the second limiting blocks and the second guide grooves are matched to pre-connect the second integrated busbar and the second end plate.

5. The battery module of claim 1, wherein, The second through hole is a counterbore.

6. The battery module according to claim 2, wherein: along the first direction, the first end plate is provided with a first rib plate on a side away from the battery cell group; along the first direction, the second end plate is provided with a second rib plate on a side away from the battery cell group.

7. The battery module according to any one of claims 2 to 6, wherein: The battery cell module comprises a top surface and a bottom surface arranged oppositely along a height direction. The battery cell module further comprises a cover plate arranged on the top surface, the cover plate being configured to be connected with the first end plate and the second end plate, and the cover plate being provided with a weight-reducing hole.

8. The battery module of claim 7, wherein, The cover plate is provided with a fifth through hole penetrating the cover plate along the height direction; The first end plate is provided with a sixth through hole on the top surface along the height direction, and the sixth through hole is in butt joint with the fifth through hole; The second end plate is provided with a seventh through hole on the top surface along the height direction, and the seventh through hole is in butt joint with the fifth through hole; A third connecting member penetrates the fifth through hole and the sixth through hole to connect the cover plate and the first end plate; A fourth connecting member penetrates the fifth through hole and the seventh through hole to connect the cover plate and the second end plate.

9. The battery module of claim 3, wherein, Further comprising: An intermediate end plate arranged between the first end plate and the second end plate along the first direction, and the intermediate end plate being arranged in parallel with the first end plate and the second end plate; The intermediate end plate is provided with an eighth through hole at both ends along the second direction, and the eighth through hole extends along the first direction; the first through hole arranged on the first integrated busbar is in butt joint with the eighth through hole; and the fourth through hole arranged on the second integrated busbar is in butt joint with the eighth through hole; The intermediate end plate is provided with a ninth through hole on the top surface along the height direction, and the ninth through hole is in butt joint with the fifth through hole; A fifth connecting member penetrates the second through hole, the first through hole and the eighth through hole in butt joint to connect the first end plate, the first integrated busbar and the intermediate end plate; A sixth connecting member penetrates the third through hole, the first through hole and the eighth through hole in butt joint to connect the second end plate, the first integrated busbar and the intermediate end plate; A seventh connecting member penetrates the second through hole, the fourth through hole and the eighth through hole in butt joint to connect the first end plate, the second integrated busbar and the intermediate end plate; An eighth connecting member penetrates the third through hole, the fourth through hole and the eighth through hole in butt joint to connect the second end plate, the second integrated busbar and the intermediate end plate; A ninth connecting member penetrates the fifth through hole and the ninth through hole to connect the cover plate and the intermediate end plate.

10. The battery module of claim 9, wherein, The intermediate end plate is provided with a plurality of intermediate end plates, and the distance between every two adjacent intermediate end plates is greater than or equal to 400 mm.

11. A battery pack, characterized by The battery module comprises the battery module according to any one of claims 1 to 10.

Images