Battery module and battery pack

Abstract

The invention discloses a battery module and a battery pack, and belongs to the technical field of batteries, the battery module comprises a plurality of single batteries, one of two adjacent single batteries is provided with a first protruding part, the other of the two adjacent single batteries is provided with a first groove, the first protruding part can be arranged in the groove, and the height of the first protruding part is greater than the depth of the first groove. According to the invention, the first protruding part and the first groove which can be matched with each other are arranged in the adjacent single batteries, and the protruding size H of the first protruding part is greater than the depth h1 of the first groove, so that the adjacent single batteries can be allowed to be connected with each other under the condition that a compressible insulating sheet is not arranged between the adjacent single batteries; the surface with the first protruding part and the surface with the first groove can form the expansion space at an interval for the expansion of the single battery, so that the number of parts of the battery module is reduced, and the assembly difficulty of the battery module is reduced. Meanwhile, the first protruding parts and the first grooves which can be matched with each other can position the adjacent single batteries, so that the assembly difficulty of the battery module is reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of batteries, and particularly relates to a battery module and a battery pack. BACKGROUND

[0002] The battery module comprises a plurality of single batteries, and a compressible insulating sheet is arranged between adjacent single batteries. The compressible insulating sheet can be compressed when the single battery expands, so as to avoid damage of the battery module due to expansion of the single battery.

[0003] However, during assembly of the battery module, the compressible insulating sheet needs to be bonded to the single battery. Positioning of the compressible insulating sheet is difficult during the bonding process, which leads to low assembly efficiency of the battery module. SUMMARY

[0004] The application provides a battery module to solve the technical problem of low assembly efficiency of the battery module. Another object of the application is to provide a battery pack.

[0005] The application provides a battery module, which comprises a plurality of single batteries. Among two adjacent single batteries, one has a first protruding part, and the other has a first recess. The first protruding part can be arranged in the first recess, and the protruding size H of the first protruding part is greater than the depth h1 of the first recess.

[0006] In some embodiments,

[0007] One of the plurality of single batteries is a first end battery, and the remaining single batteries are located on the same side of the first end battery. The side of the first end battery, which is away from the remaining single batteries, has the first protruding part.

[0008] The battery module further comprises a first end plate arranged on the side of the first end battery, which is away from the remaining single batteries. The side of the first end plate, which faces the first end battery, has a second recess. The first protruding part of the first end battery, which is away from the remaining single batteries, is arranged in the second recess.

[0009] The height H of the first protruding part is greater than the depth h2 of the second recess.

[0010] In some embodiments,

[0011] One of the plurality of single batteries is a second end battery, and the remaining single batteries are located on the same side of the second end battery. The side of the second end battery, which is away from the remaining single batteries, has the first recess.

[0012] The battery module further comprises:

[0013] a second end plate disposed on a side of the second end cell away from the remaining single cells;

[0014] a resilient member disposed between and connecting the second end plate and the second end cell, the resilient member covering the first recess.

[0015] In some embodiments,

[0016] one of the plurality of single cells is a second end cell, the remaining single cells of the plurality of single cells are located on the same side of the second end cell, and the side of the second end cell away from the remaining single cells has the first recess;

[0017] The battery module further comprises a third end plate disposed on a side of the second end cell away from the remaining single cells, and the third end plate has a second protrusion on a side thereof facing the second end cell, the second protrusion being disposed in the first recess on the side of the second end cell away from the remaining single cells.

[0018] The protrusion size of the second protrusion is greater than the depth of the first recess.

[0019] In some embodiments,

[0020] the side of the second end plate facing the second end cell has a third recess, and the height of the first protrusion is greater than the depth of the third recess.

[0021] In some embodiments,

[0022] The single cell has a first surface and a second surface facing away from each other, the first surface is provided with the first protrusion, and the second surface is provided with the first recess.

[0023] In some embodiments,

[0024] The first surface has a plurality of first protrusions, and the second surface has a plurality of first recesses.

[0025] In some embodiments,

[0026] The plurality of single cells are arranged in sequence along a first direction, the groove wall of the first recess is capable of connecting with the first protrusion to limit the first protrusion in a second direction and a third direction, and the first direction, the second direction and the third direction are perpendicular to each other.

[0027] In some embodiments,

[0028] The battery module further comprises a positioning member having a positioning hole, and the single battery is arranged in the positioning hole and connected with the positioning member.

[0029] Correspondingly, the application further provides a battery pack comprising the battery module according to any one of the above embodiments.

[0030] Beneficial effects: compared with the prior art, the battery module provided by the embodiments of the application comprises a plurality of single batteries, one of the two adjacent single batteries has a first protruding part, the other has a first recess, the first protruding part can be arranged in the first recess, and the height of the first protruding part is greater than the depth of the first recess. By arranging the first protruding part and the first recess that can match each other in the adjacent single batteries, and the protruding size H of the first protruding part is greater than the depth h1 of the first recess, the surface with the first protruding part and the surface with the first recess can form an expansion space between the adjacent single batteries without arranging the compressible insulation sheet. Therefore, when the battery module does not arrange the compressible insulation sheet between the adjacent single batteries, the battery module also has space to accommodate the part of the single battery that expands, so that the battery module can save the compressible insulation sheet, reduce the number of parts of the battery module, save the installation step of the compressible insulation sheet, and reduce the assembly difficulty of the battery module. BRIEF DESCRIPTION OF DRAWINGS

[0031] The technical solutions and other beneficial effects of the application will be apparent from the following detailed description of the specific embodiments of the application in conjunction with the accompanying drawings.

[0032] Figure 1 A structural schematic diagram of the battery module provided by the embodiments of the application is shown in the figure;

[0033] Figure 2 An exploded schematic diagram of the battery module provided by the embodiments of the application is shown in the figure;

[0034] Figure 3 A front view sectional view of the battery module provided by the embodiments of the application is shown in the figure;

[0035] Figure 4 A detail view of the middle circle A is shown in the figure; Figure 3

[0036] A detail view of the middle circle B is shown in the figure; Figure 5

[0037] A top view sectional view of the battery module provided by the embodiments of the application is shown in the figure; Figure 6 Figure 5 A detail view of the middle circle B is shown in the figure;

[0038] Figure 7 A structural schematic diagram of the single battery in the battery module provided by the embodiments of the application is shown in the figure;​

[0039] Figure 8 Another angle structural schematic of a single battery in a battery module provided by the embodiments of the present application.

[0040] Explanation of reference signs:

[0041] 100-single battery; 110-first surface; 111-first protrusion; 120-second surface; 121-first groove; 130-first end battery; 140-second end battery; 200-first end plate; 210-second groove; 300-second end plate; 310-third groove; 400-elastic member; 500-positioning member; 510-positioning hole; X-first direction; Y-second direction; Z-third direction. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0043] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood in a broad sense, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, or electrically connected or can communicate with each other; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. In the description of the present application, the meaning of "multiple" is two or more than two, unless otherwise explicitly specified and limited. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more features.

[0044] It should also be noted that in the drawings of the embodiments of the present application, the arrows marked X, Y, and Z respectively represent the first direction X, the second direction Y, and the third direction Z. The description of the present application introduces the first direction X, the second direction Y, and the third direction Z to more clearly express the relative positional relationship involved in the present application, wherein the first direction X, the second direction Y, and the third direction Z are three relative directions that intersect with each other, rather than absolute directions. In actual applications, the first direction X, the second direction Y, and the third direction Z can point to any direction in space as long as the intersection relationship between the two is maintained.

[0045] The disclosure below provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application.

[0046] The battery module includes a plurality of single cells 100 , and compressible insulating sheets are provided between adjacent single cells 100 . The compressible insulating sheets can be compressed when the single cells 100 expand during operation to prevent the battery module from being damaged due to the expansion of the single cells 100 .

[0047] However, during the assembly process of the battery module, the compressible insulating sheet needs to be bonded to the single battery cell 100 . Positioning the compressible insulating sheet during the bonding process is difficult, resulting in low assembly efficiency of the battery module.

[0048] In order to solve the above technical problem of low battery module assembly efficiency caused by the need to set compressible insulating sheets between adjacent single batteries 100, the present application provides a battery module, see Figure 1 、 Figure 2 、 Figure 3 and Figure 4 The battery module includes a plurality of single cells 100 . Among two adjacent single cells 100 , one has a first protrusion 111 and the other has a first groove 121 . The first protrusion 111 can be disposed in the first groove 121 . The protrusion dimension H of the first protrusion 111 is greater than the depth h1 of the first groove 121 .

[0049] Specifically, see Figure 4 The height of the first protrusion 111 is greater than the depth of the first groove 121, that is, the dimension of the first protrusion 111 along the protruding direction is greater than the dimension of the first groove 121 along the indented direction, wherein, Figure 4 Where H is the height of the first protrusion 111 , and h1 is the depth of the first groove 121 . In some embodiments, the dimension of the first protrusion 111 along the first direction X is greater than the dimension of the first groove 121 along the first direction X.

[0050] Specifically, due to the size of the first protruding part 111 being larger than the size of the first recess 121, the face of one of the two adjacent single batteries 100 provided with the first protruding part 111 can be spaced apart from the face of the other provided with the first recess 121.

[0051] In some embodiments, one of the two adjacent single batteries 100 has only a plurality of first protruding parts 111, part of the plurality of first protruding parts 111 is located on the side facing the other, and another part of the plurality of first protruding parts 111 is located on the side away from the other, and the other has only a plurality of first recesses 121, part of the plurality of first recesses 121 is located on the side facing the one, and another part of the plurality of first recesses 121 is located on the side away from the one; in some embodiments, the single battery 100 has both the first protruding part 111 and the first recess 121.

[0052] In some embodiments, the plurality of single batteries 100 are arranged in sequence. Specifically, the plurality of single batteries 100 are arranged in sequence along the first direction X.

[0053] In the above embodiments, due to the size of the first protruding part 111 being larger than the size of the first recess 121, the first protruding part 111 cannot be completely arranged in the first recess 121, and the part of the first protruding part 111 that cannot extend into the first recess 121 will make the face of one of the two adjacent single batteries 100 provided with the first protruding part 111 unable to adhere to the face of the other provided with the first recess 121, and form an expansion space therebetween, so that the battery module can accommodate the expansion of the single battery 100 when no compressible insulation sheet is arranged between the adjacent single batteries 100, thereby enabling the battery module to omit the compressible insulation sheet, reducing the number of parts of the battery module, omitting the installation step of the compressible insulation sheet, and reducing the assembly difficulty of the battery module.

[0054] In the above embodiments, the mutually cooperating first protruding part 111 and first recess 121 of the two adjacent single batteries 100 can realize mutual limiting along the contact direction through the contact of the first protruding part 111 and the first recess 121, thereby reducing the difficulty of positioning the single battery 100 when assembling the battery module, and making the connection between the adjacent single batteries 100 more reliable.

[0055] In some embodiments, please refer to Figure 5 and Figure 6, multiple single cells 100 are arranged in sequence, one of the multiple single cells 100 is a first end cell 130, and the remaining single cells 100 are located on the same side of the first end cell 130, and the first end cell 130 has a first protrusion 111 on a side facing away from the remaining single cells 100; the battery module also includes a first end plate 200, the first end plate 200 is arranged on a side of the first end cell 130 facing away from the remaining single cells 100, and the first end plate 200 has a second groove 210 on a side facing the first end cell 130, and the first protrusion 111 on the side of the first end cell 130 facing away from the remaining single cells 100 is arranged in the second groove 210; the protrusion dimension H of the first protrusion 111 is greater than the depth h2 of the second groove 210.

[0056] Specifically, see Figure 6 The height of the first protrusion 111 is greater than the depth of the second groove 210, that is, the dimension of the first protrusion 111 along the protruding direction is greater than the dimension of the second groove 210 along the indented direction, wherein, Figure 6 Where H is the height of the first protrusion 111, and h2 is the depth of the first groove 121. In some embodiments, the dimension of the first protrusion 111 along the first direction X is greater than the dimension of the second groove 210 along the first direction X.

[0057] Similarly, since the size of the first protrusion 111 is larger than that of the second groove 210 , the surface of the first end plate 200 with the groove and the surface of the first end battery 130 with the first protrusion 111 can be spaced apart.

[0058] On the one hand, in the above embodiment, since the size of the first protrusion 111 is larger than the size of the second groove 210, the first protrusion 111 cannot be completely set in the second groove 210. The part of the first protrusion 111 that cannot extend into the second groove 210 will push the surface of the first end battery 130 provided with the first protrusion 111 away from the surface of the first end plate 200 provided with the groove, and form an expansion space in between, so that when a compressible insulating sheet is not provided between the first end plate 200 and the first end battery 130, there is also space between the first end battery 130 and the first end plate 200 to accommodate the part of the first end battery 130 that expands toward the first end plate 200, thereby eliminating the compressible insulating sheet between the first end plate 200 and the first end battery 130, reducing the number of parts of the battery module, eliminating the installation steps of installing the compressible insulating sheet, and reducing the difficulty of assembling the battery module.

[0059] In the second aspect, in the above embodiment, the first end plate 200 and the first end battery 130 are matched with each other through the second groove 210 and the first protrusion 111, and can be limited to each other, which reduces the difficulty of positioning the first end plate 200 and the first end battery 130 when assembling the battery module, and makes the connection of the first end plate 200 and the first end battery 130 more reliable.

[0060] In some embodiments, referring to Figure 2 , one of the plurality of single batteries 100 is a second end battery 140, and the remaining single batteries 100 of the plurality of single batteries 100 are located on the same side of the second end battery 140, and the side of the second end battery 140 away from the remaining single batteries 100 has a first groove 121; the battery module further comprises a second end plate 300 and an elastic piece 400, the second end plate 300 is arranged on the side of the second end battery 140 away from the remaining single batteries 100; the elastic piece 400 is arranged between the second end plate 300 and the second end battery 140, and is connected to the second end plate 300 and the second end battery 140 respectively, and the elastic piece 400 covers the first groove 121.

[0061] In some embodiments, the elastic piece 400 is a compressible insulating sheet.

[0062] In some embodiments, the elastic piece 400 is bonded to the second end battery 140 and the second end plate 300 respectively.

[0063] Specifically, the elastic piece 400 covers the first groove 121, that is, the elastic piece 400 is connected to the surface of the second end battery 140 having the first groove 121 and facing the second end plate 300.

[0064] In the above embodiment, by arranging the elastic piece 400 between the second end plate 300 and the second end battery 140, when the second end battery 140 expands towards the second end plate 300, the elastic piece 400 is elastically deformed and compressed, so as to provide space for the expansion of the second end battery 140, and the reliability of the battery module is improved.

[0065] In some embodiments, one of the plurality of single batteries 100 is a second end battery 140, and the remaining single batteries 100 of the plurality of single batteries 100 are located on the same side of the second end battery 140, and the side of the second end battery 140 away from the remaining single batteries 100 has a first groove 121; the battery module further comprises a third end plate, the third end plate is arranged on the side of the second end battery 140 away from the remaining single batteries 100, and the side of the third end plate facing the second end battery 140 has a second protrusion, the second protrusion is arranged in the first groove 121 on the side of the second end battery 140 away from the remaining single batteries 100; the protruding size of the second protrusion is greater than the depth of the first groove 121.

[0066] Specifically, the third end plate has a second protruding portion, the second protruding portion can be arranged in the first groove 121 of the second end battery 140, and the protruding size of the second protruding portion is greater than the depth of the first groove 121, so that the surface of the third end plate with the second protruding portion can be spaced from the surface of the second end battery 140 facing the third end plate and having the first groove 121, and an expansion space is formed.

[0067] In the above embodiment, by arranging the second protruding portion capable of cooperating with the first groove 121 of the second end battery 140 on the third end plate, the positioning of the third end plate and the second end battery 140 is realized. At the same time, by limiting the size relationship between the second protruding portion and the first groove 121, the expansion space between the third end plate and the second end battery 140 is ensured.

[0068] In some embodiments, the two ends of the battery module are both the first end plate 200, and the single batteries 100 at the two ends of the plurality of single batteries 100 are both the first end battery 130, and the first protruding portion 111 is arranged on the side away from the remaining single batteries 100. In some embodiments, the two ends of the battery module are both the second end plate 300, and the single batteries 100 at the two ends of the plurality of single batteries 100 are both the second end battery 140, and the first groove 121 is arranged on the side away from the remaining single batteries. In some embodiments, please refer to Figure 1 , Figure 2 , Figure 4 and Figure 5 , the end plates at the two ends of the battery module are respectively the first end plate 200 and the second end plate 300, the single batteries 100 at the two ends of the plurality of single batteries 100 are respectively the first end battery 130 and the second end battery 140, and the first end battery 130 is connected with the first end plate 200, and the second end battery 140 is connected with the second end plate 300 through the elastic member 400.

[0069] In some embodiments, the two ends of the battery module are both the third end plate, and the single batteries 100 at the two ends of the plurality of single batteries 100 are both the second end battery 140. In some embodiments, only one third end plate is arranged at the two ends of the battery module, and the single batteries 100 facing the third end plate among the plurality of single batteries 100 are the second end battery 140.

[0070] In some embodiments, please refer to Figure 2 and Figure 5 , the side of the second end plate 300 facing the second end battery 140 has a third groove 310, and the height of the first protruding portion 111 is greater than the depth of the third groove 310.

[0071] In some embodiments, the first end plate 200 and the second end plate 300 are the same part, and the only difference is whether the side of the part adjacent to the single battery 100 has the first protrusion 111 or not.

[0072] In the above embodiments, by setting the third groove 310 on the second end plate 300, and making the height of the first protrusion 111 greater than the depth of the third groove 310, the first end plate 200 and the second end plate 300 can be interchanged when assembling the battery module, reducing the types of parts in the battery module, and reducing the assembly difficulty of the battery module.

[0073] In some embodiments, referring to Figure 7 and Figure 8 , the single battery 100 has a first surface 110 and a second surface 120 facing away from each other, the first surface 110 is provided with the first protrusion 111, and the second surface 120 is provided with the first groove 121.

[0074] It can be understood that, in order to enable the first protrusion 111 and the first groove 121 of the two adjacent single batteries 100 to match each other, in the same single battery 100, the orthographic projection of the first protrusion 111 on the first surface 110 is located in the orthographic projection of the first groove 121 on the first surface 110 along the direction in which the first surface 110 and the second surface 120 face away from each other.

[0075] In the above embodiments, by setting the first protrusion 111 and the first groove 121 on the two sides of the same single battery 100 respectively, the structure of each single battery 100 can be made the same under the premise that the adjacent single batteries 100 can cooperate with each other through the first protrusion 111 and the first groove 121, thereby reducing the types of parts in the battery module and further reducing the assembly difficulty of the battery module.

[0076] It can be understood that, in some embodiments, the first surface 110 can also be provided with the first groove 121, and the second surface 120 can also be provided with the first protrusion 111, as long as the first protrusion 111 of one of the two adjacent single batteries 100 can be arranged in the first groove 121 of the other.

[0077] In some embodiments, referring to Figure 7 and Figure 8 , the first surface 110 has a plurality of first protrusions 111, and the second surface 120 has a plurality of first grooves 121.

[0078] In the above embodiment, by arranging the plurality of first protrusions 111 and the plurality of first grooves 121, the relative rotation of the two adjacent single batteries 100 relative to each other is limited, the limiting capability between the two adjacent single batteries 100 is further improved, and the assembly difficulty of the battery module is reduced. At the same time, the stability of the expansion space is ensured, and the use reliability of the battery module is improved.

[0079] In some embodiments, referring to Figure 7 and Figure 8 , the plurality of single batteries 100 are arranged in sequence along a first direction X, the first protrusions 111 extend along a second direction Y, and the plurality of first protrusions 111 on the first surface 110 are arranged at intervals along a third direction Z; the first grooves 121 extend along the second direction Y, and the plurality of first grooves 121 on the second surface 120 are arranged at intervals along the third direction Z, and the first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0080] In some embodiments, the first direction X is the thickness direction of the single battery 100, the second direction Y is the height direction of the single battery 100, and the third direction Z is the width direction of the single battery 100.

[0081] In some embodiments, the first protrusion 111 is a strip-shaped first protrusion 111, the strip-shaped protrusion extends along the second direction Y, and the size of the first protrusion 111 along the second direction Y is much larger than the size of the first protrusion 111 in other directions; correspondingly, the first groove 121 is a strip-shaped groove, the strip-shaped groove extends along the second direction Y, and the size of the groove along the second direction Y is much larger than the size of the groove in other directions.

[0082] In the above embodiment, by limiting the shape of the plurality of first protrusions 111 and the positional relationship therebetween, and limiting the shape of the plurality of first grooves 121 and the positional relationship therebetween, the relative position between the two adjacent single batteries 100 can be more stable, the possibility of relative rotation between the two adjacent single batteries 100 is reduced, the assembly difficulty of the battery module is reduced, the stability of the expansion space is ensured, and the use reliability of the battery module is improved.

[0083] In some embodiments, the first end plate 200 has a plurality of second grooves 210, the second grooves 210 extend along the second direction Y, and the plurality of second grooves 210 are arranged at intervals along the third direction Z.

[0084] In some embodiments, referring to Figure 4 and Figure 6The plurality of single batteries 100 are arranged in sequence along a first direction X, and the groove wall of the first groove 121 is capable of connecting with the first protruding part 111 to limit the first protruding part 111 along a second direction Y and a third direction Z, and the first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0085] It can be understood that, since the first protruding part 111 is capable of being inserted into the first groove 121, the contact between the first protruding part 111 and the groove wall of the first groove 121 is capable of limiting the relative position of the adjacent two single batteries 100 along the first direction X. However, the first protruding part 111 needs to be capable of contacting the groove wall of the first groove 121 and being limited along the second direction Y and the third direction Z, the first protruding part 111 needs to be capable of contacting the groove wall of the first groove 121 along the second direction Y, such as Figure 4 , and the first protruding part 111 needs to be capable of contacting the groove wall of the first groove 121 along the third direction Z.

[0086] In some embodiments, the first groove 121 has a groove side wall and a groove bottom wall, and the groove side wall is arranged around the groove bottom wall to be capable of contacting the first protruding part 111 along the second direction Y and the third direction Z, respectively.

[0087] In some embodiments, the first groove 121 has a groove bottom wall, a first groove side wall and a second groove side wall oppositely arranged along the second direction Y, a third groove side wall and a fourth groove side wall oppositely arranged along the third direction Z, the first groove side wall and the second groove side wall are connected with the groove bottom wall, respectively, the third groove side wall is arranged between the first groove side wall and the second groove side wall and connected with the first groove side wall and the second groove side wall, respectively, and the fourth groove side wall is arranged between the first groove side wall and the second groove side wall and connected with the first groove side wall and the second groove side wall, respectively. Among them, the first groove side wall and the second groove side wall are capable of contacting the first protruding part 111 and limiting the displacement of the first protruding part 111 along the second direction Y; the third groove side wall and the fourth groove side wall are capable of contacting the first protruding part 111 and limiting the displacement of the first protruding part 111 along the third direction Z.

[0088] In the above embodiments, by enabling the first groove 121 to limit the first protruding part 111 along the second direction Y and the third direction Z, in the case that the first protruding part 111 is inserted into the first groove 121, the adjacent two single batteries 100 are not easy to produce relative movement along the second direction Y and the third direction Z, further reducing the assembly difficulty of the battery module.

[0089] In some embodiments, referring to Figure 1 and Figure 2 , the battery module further comprises a positioning member 500, the positioning member 500 has a positioning hole 510, and the single battery 100 is arranged through the positioning hole 510 and connected with the positioning member 500.

[0090] In some embodiments, the positioning member 500 is a steel cable, which is wrapped around and forms the positioning hole 510.

[0091] In the first aspect, in the above embodiments, by arranging the positioning member 500 to wrap around the plurality of single batteries 100, the relative movement of the adjacent two single batteries 100 in the direction away from each other is limited, so that the structure of the battery module is more stable.

[0092] In the second aspect, the positioning member 500 can also make the adjacent two battery assemblies abut each other and generate a friction force, thereby further limiting the relative movement of the adjacent two single batteries 100 in the second direction Y or the third direction Z, so that the structure of the battery module is more stable.

[0093] Correspondingly, the application also provides a battery pack comprising the battery module according to any one of the above embodiments.

[0094] The above describes in detail the battery module and the single battery 100 provided by the embodiments of the application. The principles and implementation manners of the application are described by using specific examples. The above description of the embodiments is only used to help understand the technical solutions of the application and the core ideas thereof. Those skilled in the art should understand that the technical solutions recorded in the above embodiments can be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the application.

Claims

1. A battery module, characterized in that: The invention comprises a plurality of single cells (100), wherein one of two adjacent single cells (100) has a first protrusion (111) and the other has a first groove (121), the first protrusion (111) can be arranged in the first groove (121), and a protrusion dimension H of the first protrusion (111) is greater than a depth h1 of the first groove (121).

2. The battery module according to claim 1, wherein: One of the plurality of single cells (100) is a first end cell (130), the remaining single cells (100) are located on the same side of the first end cell (130), and the first end cell (130) has the first protrusion (111) on a side facing away from the other single cells (100); The battery module further comprises a first end plate (200), the first end plate (200) being arranged on a side of the first end battery (130) facing away from the other single batteries (100), and the first end plate (200) having a second groove (210) on a side facing the first end battery (130), and the first protrusion (111) on a side of the first end battery (130) facing away from the other single batteries (100) being arranged in the second groove (210); A protruding dimension H of the first protrusion (111) is greater than a depth h2 of the second groove (210).

3. The battery module according to claim 1, wherein: One of the plurality of single cells (100) is a second end cell (140), the remaining single cells (100) in the plurality of single cells (100) are located on the same side of the second end cell (140), and the second end cell (140) has the first groove (121) on a side facing away from the remaining single cells (100); The battery module further includes: a second end plate (300), the second end plate (300) being arranged on a side of the second end battery (140) facing away from the remaining single batteries (100); An elastic member (400) is provided between the second end plate (300) and the second end battery (140), and is respectively connected to the second end plate (300) and the second end battery (140), and the elastic member (400) is covered in the first groove (121).

4. The battery module according to claim 1, wherein: One of the plurality of single cells (100) is a second end cell (140), the remaining single cells (100) in the plurality of single cells (100) are located on the same side of the second end cell (140), and the second end cell (140) has the first groove (121) on a side facing away from the remaining single cells (100); The battery module further comprises a third end plate, the third end plate being arranged on a side of the second end battery (140) facing away from the rest of the single batteries (100), and the third end plate having a second protrusion on a side facing the second end battery (140), the second protrusion being arranged in a first groove (121) on a side of the second end battery (140) facing away from the rest of the single batteries (100); The protruding dimension of the second protrusion is greater than the depth of the first groove (121).

5. The battery module according to claim 3, wherein: The second end plate (300) has a third groove (310) on a side facing the second end battery (140), and the height of the first protrusion (111) is greater than the depth of the third groove (310).

6. The battery module according to claim 1, characterized in that: The single battery (100) has a first surface (110) and a second surface (120) that are separated from each other, the first surface (110) is provided with the first protrusion (111), and the second surface (120) is provided with the first groove (121).

7. The battery module according to claim 6, characterized in that: The first surface (110) has a plurality of first protrusions (111), and the second surface (120) has a plurality of first grooves (121).

8. The battery module according to claim 1, wherein: The plurality of single batteries (100) are arranged in sequence along a first direction (X), and the groove wall of the first groove (121) can be connected to the first protrusion (111) to limit the first protrusion (111) along a second direction (Y) and a third direction (Z), and the first direction (X), the second direction (Y) and the third direction (Z) are perpendicular to each other.

9. The battery module according to claim 1, wherein: The battery module further comprises a positioning member (500), the positioning member (500) having a positioning hole (510), the single battery (100) passing through the positioning hole (510) and connected to the positioning member (500).

10. A battery pack, characterized in that: A battery module comprising the battery module according to any one of claims 1 to 9.

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