Battery pack

Abstract

The utility model provides a battery pack which comprises a battery pack, a shell and colloid, the battery pack comprises a battery cell group and a plate body assembly, the plate body assembly comprises an end plate, the end plate comprises a body, a first guide structure and a connecting hole, and the end plate is connected with the battery cell group; a cross beam is arranged in the shell, a second guide structure is arranged on the cross beam, a second connecting groove is formed in the second guide structure, the first guide structure can be matched with the second guide structure during assembly, the first connecting hole corresponds to the second connecting groove, and the colloid is located in the first connecting hole and the second connecting groove at the same time, so that the battery pack and the cross beam in the shell are assembled; and the size accumulation error caused by battery cell stacking is eliminated, rapid alignment in the assembly process is realized, secondary assembly is avoided, the assembly efficiency is improved, and the assembly cost is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of battery technology, and specifically relates to a battery pack. Background Technology

[0002] With the rapid development of electric vehicles, battery packs have become a core component. A battery pack generally includes a housing and a battery array housed inside the housing. This battery array contains multiple battery cells connected in parallel and in the same direction.

[0003] In related technologies, when assembling battery packs, multiple individual battery cells are usually grouped together to form a battery pack before being hoisted and installed into the housing. However, the battery pack is prone to deviations between the landing position and the installation position. Furthermore, since the battery pack is heavy and difficult to move, it requires secondary hoisting, resulting in low installation efficiency and high assembly costs. Utility Model Content

[0004] This utility model provides a battery pack and battery module to solve the alignment efficiency problem during battery assembly.

[0005] To solve the above-mentioned technical problems, this utility model is implemented as follows:

[0006] This application provides a battery pack having a first direction, a second direction, and a third direction that intersect each other, including a battery pack, a housing, and a gel.

[0007] A battery pack includes cell packs and panel assemblies; among which,

[0008] The battery pack includes multiple battery cells arranged along the first direction;

[0009] The plate assembly includes an end plate; the end plate includes a body, a first guide structure, and a connecting hole; the body is located on one side of the cell assembly along the first direction and is connected to a single battery cell located at the end of the cell assembly in the first direction; the first guide structure is connected to one end of the body along the third direction, the connecting hole penetrates the body and the first guide structure along the third direction, and the colloid is located inside the connecting hole;

[0010] The housing has a cavity, and a crossbeam extending along the second direction is provided in the cavity. A second guide structure is provided at one end of the crossbeam along the third direction. The battery pack is disposed in the cavity, and the first guide structure is inserted into the second guide structure along the third direction.

[0011] The second guide structure has a second connecting groove on its end face facing the first guide structure. The second connecting groove is arranged in a third direction corresponding to the connecting hole. The colloid is also located in the second connecting groove and is connected to both the first guide structure and the second guide structure.

[0012] Optionally, the first guide structure has an inclined wall portion and a bottom wall portion; the bottom wall portion is located at one end of the first guide structure away from the body along the third direction; there are two inclined walls portions, which are respectively located on both sides of the bottom wall portion along the second direction, and the two inclined walls portions extend along the third direction; one end of each of the two inclined walls portions is connected to the body, and the other end is close to each other along the second direction; the two ends of the bottom wall portion are respectively connected to the ends of the two inclined walls portions away from the body.

[0013] The connecting hole is located on the inclined wall portion and / or the bottom wall portion.

[0014] Optionally, there are multiple connecting holes, and the multiple connecting holes are arranged at intervals.

[0015] At least one of the connecting holes extends through the end face of the body away from the first guide structure to the inclined wall portion;

[0016] Furthermore, at least one of the connecting holes extends through the end face of the body away from the first guide structure to the bottom wall portion.

[0017] Optionally, the battery pack further includes a first fastener;

[0018] The first fastener is disposed around the body and the cell assembly to fix the end plate to the cell assembly.

[0019] Optionally, there are two end plates, which are respectively located on opposite sides of the battery cell assembly along the first direction;

[0020] The plate assembly also includes side plates;

[0021] The side plates are two in number and are located on opposite sides of the battery cell assembly along the second direction.

[0022] The first fastener is arranged around the body, the side plate and the battery cell assembly to fix the end plate, the side plate and the battery cell assembly to each other.

[0023] Optionally, the first fastener is at least partially received in the first connecting groove;

[0024] The first connecting groove is disposed on the side of the body away from the battery cell assembly and extends along the second direction;

[0025] and / or

[0026] The first connecting groove is disposed on the side of the side plate away from the battery cell assembly and extends along the first direction.

[0027] Optionally, the battery pack further includes an adhesive layer;

[0028] The adhesive layer is sandwiched between the body and the battery cell assembly, and is used to bond the body and the battery cell assembly;

[0029] Alternatively, the adhesive layer may be sandwiched between the side plate and the battery cell assembly to bond the side plate and the battery cell assembly.

[0030] Optionally, the end plate further includes fixing holes;

[0031] The fixing hole and the connecting hole are spaced apart, and the fixing hole penetrates the body along the third direction. The fixing hole is suitable for installing a second fastener.

[0032] Optionally, the end plate further includes a lifting hole; the lifting hole is located on the end face of the body opposite to the first guide structure, and the lifting hole is adapted to install a lifting hook.

[0033] Optionally, the crossbeam further includes a fixing groove; the fixing groove is located on the end face of the crossbeam facing the body, the fixing groove and the second connecting groove are spaced apart from each other, and the fixing groove is arranged opposite to the fixing hole along the third direction;

[0034] The battery pack also includes a second fastener, which is installed in the fixing hole and the fixing groove to fix the crossbeam to the body.

[0035] In this embodiment, an end plate with a first guide structure is provided on the battery pack, and a crossbeam with a second guide structure is provided inside the housing. When stacking the battery pack, the cooperation between the first guide structure and the second guide structure can achieve rapid positioning during the assembly process, avoid secondary assembly, improve assembly efficiency, and reduce assembly costs. At the same time, it can eliminate the cumulative dimensional error caused by cell stacking and improve the volumetric energy density of the battery pack. A connecting hole is provided on the end plate, and a corresponding second connecting groove is provided on the crossbeam. The glue injected into the connecting hole and the second connecting groove solidifies to form a colloid. On the one hand, it can fix the end plate and the crossbeam to each other, effectively improving the mechanical strength of the battery pack. On the other hand, the fluidity of the glue before solidification means that even if there is an error in the alignment of the connecting hole and the second connecting groove, it will not affect the fixation of the two, which can reduce the processing accuracy requirements and make the stress distribution at the connection more uniform. Attached Figure Description

[0036] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0037] Figure 1 This is a schematic diagram of the structure of a battery pack provided in an embodiment of the present invention;

[0038] Figure 2 This is a schematic diagram of another view of the structure of a battery pack provided in an embodiment of this utility model;

[0039] Figure 3 yes Figure 1 Exploded view of the battery pack;

[0040] Figure 4 This is a schematic diagram of the structure of a battery pack provided in an embodiment of the present invention;

[0041] Figure 5 This is an exploded view of a battery pack provided in an embodiment of this utility model;

[0042] Figure 6 This is an exploded view of a portion of the structure of a battery pack provided in an embodiment of this utility model;

[0043] Figure 7 yes Figure 3 A structural diagram of the connection between the battery pack and the crossbeam;

[0044] Figure 8 This is a schematic diagram of a battery pack hoisting provided in an embodiment of this utility model.

[0045] Explanation of reference numerals in the attached figures:

[0046] Battery pack-100, battery group-1, cell group-11, single cell-111, plate assembly-12, end plate-121, body-1211, first guide structure-1212, inclined wall-12111, bottom wall-12112, connecting hole-1213, fixing hole-1214, second fastener-1215, lifting hole-1216, colloid-4, side plate-122, first connecting groove-123, first fastener-13, adhesive layer-14, shell-2, crossbeam-21, second guide structure-211, second connecting groove-212, fixing groove-213, seal-22, cover plate-23, lower box-24, groove-25, hook-3. Detailed Implementation

[0047] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0048] The terms "first," "second," etc., used in the specification and claims of this utility model are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of this utility model can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, the first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0049] The battery pack 1 and battery pack 100 provided in this utility model embodiment will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0050] See Figure 1-3 The battery pack 100 has a first direction X, a second direction Y and a third direction Z that intersect each other in pairs, and is characterized in that it includes a battery pack 1, a housing 2 and a gel 4.

[0051] Battery pack 1 includes cell pack 11 and plate assembly 12; wherein,

[0052] The battery pack 11 includes a plurality of battery cells 111 arranged along a first direction X;

[0053] The plate assembly 12 includes an end plate 121; the end plate 121 includes a body 1211, a first guide structure 1212, a connecting hole 1213, and a gel 4; the body 1211 is located on one side of the cell assembly 11 along the first direction X, and is connected to the battery cell 111 located at the end of the cell assembly 11 along the first direction X; the first guide structure 1212 is connected to one end of the body 1211 along the third direction Z, and the connecting hole 1213 penetrates the body 1211 and the first guide structure 1212 along the third direction Z; the gel 4 is located inside the connecting hole 1213.

[0054] The housing 2 has a cavity, and a crossbeam 21 extending along the second direction Y is provided in the cavity. A second guide structure 211 is provided at one end of the crossbeam 21 along the third direction Z. The battery pack 1 is disposed in the cavity, and the first guide structure 1212 is inserted into the second guide structure 211 along the third direction Z.

[0055] The second guide structure 211 has a second connecting groove 212 on its end face facing the first guide structure 1212. The second connecting groove 212 is arranged in the third direction Z and corresponds to the connecting hole 1213. The colloid 4 is also located in the second connecting groove 212 and is connected to both the first guide structure 1212 and the second guide structure 211.

[0056] In this embodiment of the application, the first direction X, the second direction Y, and the third direction Z intersect each other and are perpendicular to each other, such as... Figure 1 As shown, the first direction X is the length direction of battery pack 1, the second direction Y is the width direction of battery pack 1, and the third direction Z is the height direction of battery pack 1.

[0057] The battery cell assembly 11 includes a plurality of battery cells 11 arranged sequentially along a first direction.

[0058] The end plate 121 includes a body 1211, a first guide structure 1212, and a connecting hole 1213. The body 1211 is a cuboid with uniform thickness, and the length of the body 1211 along the second direction Y is the same as the width of the battery cell 11 along the second direction Y. The first guide structure 1212 is connected to one end of the body 1211 and has a wedge shape. The thickness of the first guide structure 1212 along the first direction X is less than or equal to the thickness of the body 1211 along the first direction X. The first guide structure 1212 is located below the body 1211 along the third direction Z and is connected to the body 1211. The connecting hole 1213 penetrates the body 1211 and the first guide structure 1212 along the third direction Z.

[0059] The thickness of the body 1211 along the first direction X can be set according to actual needs, and this application embodiment does not limit it.

[0060] The thickness of the main body 1211 along the first direction X can be greater than the thickness of the side plate 122, thereby achieving a better protection effect for the battery cell assembly 11.

[0061] It is understandable that the main body 1211 and the first guide structure 1212 can be integrally formed.

[0062] Because the first guide structure 1212 and the second guide structure 211 cooperate, the relative positions of the battery pack 1 and the battery pack housing 2 can be accurately guaranteed during the assembly process, making assembly easier. Through the cooperation between the guide structures, high-precision positioning can be achieved, avoiding the situation of secondary installation due to deviation in the installation position, thereby improving the installation efficiency and reducing the assembly cost.

[0063] In addition, since the connecting hole 1213 and the second connecting groove 212 correspond to each other along the third direction Z, the colloid 4 is formed by the glue filling the connecting hole 1213 and the second connecting groove 212 and solidifying, thereby fixing the end plate 121 and the crossbeam 21 to each other. Compared with fixing methods such as screws, the alignment accuracy requirements of the connecting hole 1213 and the second connecting groove 212 can be further reduced. Even if there is an error in the alignment of the connecting hole 1213 and the second connecting groove 212, the fluidity of the glue can still fill both at the same time. After fixing, the two are relatively fixed, further reducing the assembly difficulty and avoiding stress concentration at this point.

[0064] The connecting hole 1213 can be set to a circle or a racetrack shape. This setting can increase the glue application area in a limited space on the body and improve the reliability of the glue bonding.

[0065] In some embodiments, along the second direction Y, the width of the second connecting groove 212 may be larger than the width of the connecting hole 1213 to facilitate alignment of the two.

[0066] The battery pack 100 also includes a housing 2, inside which the battery pack 1 is disposed. The housing 2 thus protects the battery pack 1 from external damage, thereby extending the lifespan of the battery pack 100.

[0067] In some embodiments, the housing 2 includes a cover plate 23 and a lower housing 24, which are detachably connected and, when connected, enclose to form the housing 2. To improve the sealing performance of the battery pack 100, the housing 2 also includes a seal 22, which is disposed at the connection position between the cover plate 23 and the lower housing 24. Thus, the cover plate 23 and the lower housing 24 can enclose to form a sealed cavity for accommodating the battery pack 1.

[0068] It should be noted that the aforementioned sealing element 22 can be a silicone strip or a rubber strip, or other sealing elements with the same function. This application embodiment does not limit this.

[0069] The shell 2 is provided with a crossbeam 21 and a second guide structure 211, wherein the crossbeam 21 can be a side beam of the lower box or an internal middle crossbeam.

[0070] In one embodiment, the second guide structure 211 is a groove with the same shape and size as the first guide structure 1212, ensuring the accurate relative position of the battery pack 1 and the battery housing 2 during assembly, making assembly easier. Through the cooperation between the guide structures, high-precision positioning can be achieved. This avoids the need for secondary installation due to installation position deviations, thereby improving installation efficiency and reducing assembly costs.

[0071] The structure of the battery pack 1 described above enables high production efficiency and low production cost when producing the battery pack 1, thereby improving the production efficiency of the battery pack 100 and reducing the production cost of the battery pack 100.

[0072] Alternatively, in some embodiments, see Figure 2-3 The first guide structure 1212 has an inclined wall portion 12111 and a bottom wall portion 12112; the bottom wall portion 12112 is located at one end of the first guide structure 1212 away from the body 1211 along the third direction Z; there are two inclined wall portions 12111, which are respectively located on both sides of the bottom wall portion 12112 along the second direction Y, and the two inclined wall portions 12111 extend along the third direction; one end of each of the two inclined wall portions 12111 is connected to the body 1211, and the other end is close to each other along the second direction Y; the two ends of the bottom wall portion 12112 are respectively connected to the ends of the two inclined wall portions 12111 away from the body 1211; the connecting hole 1213 is located on the inclined wall portion 12111 and / or the bottom wall portion 12112.

[0073] In this embodiment, the first guide structure 1212 can be a wedge-shaped structure with two inclined wall portions 12111 and a bottom wall portion 12112. The bottom wall portion 12112 is located at one end of the first guide structure 1212 away from the body 1211 along the third direction Z. The two inclined wall portions 12111 are respectively located on both sides of the bottom wall portion 12112 along the second direction Y. One end of the two inclined wall portions 12111 extends along the third direction Z towards the body 1211 and connects to the body. The other end extends along the third direction Z away from the body 1211 and gradually approaches.

[0074] Optionally, the two inclined wall portions 12111 of the first guide structure 1212 smoothly transition towards the bottom wall portion 12112, forming a rounded corner. During assembly, this allows the first guide structure 1212 to smoothly engage with the second guide structure 211, making the assembly process smoother. Furthermore, under the weight of the battery pack 1, the inclined wall surfaces 12111 in the wedge-shaped structure can automatically adjust their position to a certain extent, placing the battery pack 1 into the predetermined position, eliminating the cumulative dimensional tolerances caused by cell stacking, and improving the volumetric energy density of the battery pack.

[0075] Alternatively, in some embodiments, see Figure 1-3 and Figure 6 There are multiple connecting holes 1213, which are spaced apart from each other; at least one connecting hole 1213 extends through the end face of the body 1211 away from the first guide structure 1212 to the inclined wall portion 12111.

[0076] Multiple connecting holes 1213 can increase the bonding area.

[0077] refer to Figure 3The lifting hole 1216 can be set in the middle of the body 1211. Multiple connecting holes 1213 and a fixing hole 1214 are symmetrically arranged on both sides of the lifting hole 1216.

[0078] At least one connecting hole 1213 extends through the end face of the body 1211 away from the first guide structure 1212 to the inclined wall portion 12111. In this way, during the bonding process, the adhesive force on the inclined wall portion 12111 can be increased, the friction force can be enhanced, and the component force of the battery pack housing 2 sliding downward can be effectively resisted, preventing relative displacement between the cell assembly 121 and the housing 2, and more effectively improving the mechanical strength and stability of the cell assembly.

[0079] Alternatively, in some embodiments, see Figure 1-3 The battery pack 1 also includes a first fastener 13; the first fastener 13 is arranged around the body 1211 and the cell group 11 to fix the end plate 121 and the cell group 11 to each other.

[0080] It should be noted that the aforementioned first fastener 13 may be an elastic element, a strap or a steel cable tie, or other first fasteners with the same function. This application embodiment does not limit this.

[0081] The elastic element can be a rubber washer without a fixed shape or a plastic elastic washer; this application does not limit this.

[0082] In this embodiment, the first fastener 13 surrounds the body 1211 and the cell assembly 11, which can exert a force on the end plate 121 and the cell assembly 11 to bring them closer together, thereby increasing the squeezing force exerted by the end plate 121 on the cell assembly 11, making the structure of the cell assembly 11 more stable and ensuring the overall strength of the battery pack 1.

[0083] Alternatively, in some embodiments, see Figure 1-3 There are two end plates 121, which are located on opposite sides of the cell assembly 11 along the first direction X. The plate assembly 12 also includes two side plates 122, which are located on opposite sides of the cell assembly 11 along the second direction Y. The first fastener 13 is arranged around the body 1211, the side plates 122 and the cell assembly 11 to fix the end plates 121, the side plates 122 and the cell assembly 11 to each other.

[0084] In this embodiment, since the battery cell assembly 11 can be rectangular, two oppositely arranged end plates 121 and two oppositely arranged side plates 122 are provided. The length of the side plates 122 is the same as the length of the battery cell assembly 11 along the Y direction, and the width is the same as the height of the battery cell assembly 11 along the Z direction. The end plates 121 and side plates 122 are perpendicular to each other, forming a plate assembly, which can create a protective space around the battery cell assembly 11, in which the battery cells are placed. This improves the strength of the battery cell assembly 11. The first fastener 13 surrounds the body 1211 and the side plates 122, not only fixing the side plates 122 and end plates 121 together, but also subjecting the battery cell assembly 11 to compressive force on all four sides, further improving the stability and strength of the battery cell assembly 11 during assembly and subsequent use.

[0085] Alternatively, in some embodiments, see Figure 1-3 The first fastener 13 is at least partially accommodated in the first connecting groove 123; wherein the connecting groove 123 is located on the side of the body 1211 away from the battery cell assembly 11 and extends along the second direction Y; and / or the first connecting groove 123 is disposed on the side plate 122 away from the side of the battery cell assembly 11 and extends along the first direction X.

[0086] The first connecting groove 123 is a through groove provided on the side of the body 1211 away from the battery cell assembly 11 and extending along the second direction Y with both ends open; and / or the first connecting groove 123 is a through groove provided on the side plate 122 away from the battery cell assembly 11 and extending along the first direction X with both ends open.

[0087] The first fastener 13 is at least partially accommodated in the first connecting groove 123, making the connection between the first fastener 13 and the first connecting groove 123 more secure, reducing the probability of the first fastener 13 slipping off the battery pack 1, and further improving the stability of the battery pack 1.

[0088] Alternatively, in some embodiments, see Figure 3 The battery pack 1 also includes an adhesive layer 14;

[0089] The adhesive layer 14 is sandwiched between the body 1211 and the cell assembly 11 to bond the body 1211 and the cell assembly 11; or the adhesive layer 14 is sandwiched between the side plate 122 and the cell assembly 11 to bond the side plate 122 and the cell assembly 11.

[0090] It should be noted that the adhesive layer 14 can be formed by curing hot melt plastic, or by curing liquid adhesive, or it can be a sheet adhesive. This application embodiment does not limit this.

[0091] The sheet adhesive can be double-sided tape or hot melt adhesive film, and this application does not limit the specific type of adhesive.

[0092] This allows the main body 1211 or side plate 122 to be tightly bonded to the cell assembly 11, thus making the structure of the battery pack 1 more stable.

[0093] Alternatively, in some embodiments, see Figure 1-3 The end plate 121 also includes a fixing hole 1214; the fixing hole 1214 is spaced apart from the connecting hole 1213, and the fixing hole 1214 penetrates the body 1211 along the third direction Z, and the fixing hole 1214 is suitable for installing the second fastener 1215.

[0094] It should be noted that the fixing hole can be a screw hole, a rivet hole, or a pin hole, and this application embodiment does not limit this.

[0095] It should be noted that the second fastener 1215 can be a bolt, screw, or other second fasteners with the same function. This application embodiment does not limit this.

[0096] The end plate 121 and crossbeam 21 of battery pack 1 are fixed together by a second fastener 1215. The end plate 121 and the lower housing crossbeam 21 are connected by the second fastener 1215 and the adhesive 4, which can further improve the overall mechanical strength of the battery pack 100 and increase the safety performance of the power battery. In addition, the end plate 121 and crossbeam 21 of battery pack 1, under the double connection of the second fastener 1215 and the adhesive 4, form a new battery pack crossbeam, which can increase the space of the lower housing and save development costs.

[0097] Alternatively, in some embodiments, see Figure 1-3 and Figure 7 The end plate 121 also includes a lifting hole 1216; the lifting hole 1216 is provided on the end face of the body 1211 away from the first guide structure 1212, and the lifting hole 1216 is suitable for installing the hook 3.

[0098] The lifting hole 1216 can be a circular screw hole, and the hook 3 is a vertical part with threads at the bottom.

[0099] In this embodiment, the lifting hole 1216 is used to connect the hook 3, which is screwed into the lifting hole 1216. This allows the battery pack 1, formed by the assembly, to be installed into the housing 2 via lifting. Compared to manual assembly, lifting improves assembly efficiency.

[0100] Alternatively, in some embodiments, see Figure 1-7The crossbeam 21 also includes a fixing groove 213; the fixing groove 213 is located on the end face of the crossbeam 21 facing the body 1211, the fixing groove 213 and the second connecting groove 212 are spaced apart from each other, and the fixing groove 213 is arranged opposite to the fixing hole 1214 along the third direction Z; the battery pack 100 also includes a second fastener 1215, the second fastener 1215 is installed in the fixing hole 1215 and the fixing groove 213, so that the crossbeam 21 and the body 1211 are fixed to each other.

[0101] In this embodiment, since the crossbeam 21 also includes a fixing groove 213 corresponding to the fixing hole 1214, by installing the second fastener 1215 in the fixing hole 1214 and the fixing groove 213, the crossbeam 21 and the body 1211 can be fixed to each other, increasing the rigidity of the battery pack 100 and further improving the structural stability of the battery pack 100. In addition, the end plate 121 and the lower housing crossbeam 21 are fixed by bolts and adhesive, which is equivalent to forming a new lower housing crossbeam. In addition to improving the strength of the battery pack, it can also save materials and costs and reduce the weight of the battery pack.

[0102] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A battery pack (100) having a first direction (X), a second direction (Y), and a third direction (Z) intersecting each other in pairs, characterized in that, Includes battery pack (1), casing (2) and gel (4); The battery pack (1) includes a cell assembly (11) and a plate assembly (12); wherein, The cell pack (11) includes a plurality of battery cells (111) arranged along the first direction (X). The plate assembly (12) includes an end plate (121); the end plate (121) includes a body (1211), a first guide structure (1212), and a connecting hole (1213); the body (1211) is located on one side of the cell assembly (11) along the first direction (X) and is connected to the battery cell (111) located at the end of the cell assembly (11) in the first direction (X); the first guide structure (1212) is connected to one end of the body (1211) along the third direction (Z), and the connecting hole (1213) penetrates the body (1211) and the first guide structure (1212) along the third direction (Z); the colloid (4) is located inside the connecting hole (1213); The housing (2) has a cavity, and a crossbeam (21) extending along the second direction (Y) is provided in the cavity. A second guide structure (211) is provided at one end of the crossbeam (21) along the third direction (Z). The battery pack (1) is disposed in the cavity, and the first guide structure (1212) is inserted into the second guide structure (211) along the third direction (Z). The second guide structure (211) has a second connecting groove (212) on its end face facing the first guide structure (1212). The second connecting groove (212) is arranged in the third direction (Z) corresponding to the connecting hole (1213). The colloid (4) is also located in the second connecting groove (212). The colloid (4) is connected to both the first guide structure (1212) and the second guide structure (211).

2. The battery pack (100) according to claim 1, characterized in that, The first guide structure (1212) has an inclined wall portion (12111) and a bottom wall portion (12112); the bottom wall portion (12112) is located at one end of the first guide structure (1212) away from the body (1211) along the third direction (Z); there are two inclined wall portions (12111) and they are respectively located on both sides of the bottom wall portion (12112) along the second direction (Y); the two inclined wall portions (12111) extend along the third direction (Z); one end of each of the two inclined wall portions (12111) is connected to the body (1211), and the other end is close to each other along the second direction (Y); the two ends of the bottom wall portion (12112) are respectively connected to the ends of the two inclined wall portions (12111) away from the body (1211); The connecting hole (1213) is located on the inclined wall portion (12111) and / or the bottom wall portion (12112).

3. The battery pack (100) according to claim 2, characterized in that, There are multiple connecting holes (1213), and the multiple connecting holes (1213) are spaced apart from each other; At least one of the connecting holes (1213) extends through the end face of the body (1211) away from the first guide structure (1212) to the inclined wall portion (12111). And at least one of the connecting holes (1213) extends through the end face of the body (1211) away from the first guide structure (1212) to the bottom wall portion (12112).

4. The battery pack (100) according to claim 1 or 3, characterized in that, The battery pack (1) also includes a first fastener (13). The first fastener (13) is arranged around the body (1211) and the cell assembly (11) to fix the end plate (121) to the cell assembly (11).

5. The battery pack (100) according to claim 4, characterized in that, The end plates (121) are two in number and are located on opposite sides of the battery cell assembly (11) along the first direction (X); The plate assembly (12) also includes a side plate (122); The side plates (122) are two in number and are located on opposite sides of the battery cell assembly (11) along the second direction (Y); The first fastener (13) is arranged around the body (1211), the side plate (122) and the battery cell assembly (11) to fix the end plate (121), the side plate (122) and the battery cell assembly (11) to each other.

6. The battery pack (100) according to claim 5, characterized in that, The first fastener (13) is at least partially accommodated in the first connecting groove (123); The first connecting groove (123) is disposed on the side of the body (1211) away from the battery cell assembly (11) and extends along the second direction (Y); and / or The first connecting groove (123) is disposed on the side of the side plate (122) away from the battery cell assembly (11) and extends along the first direction (X).

7. The battery pack (100) according to claim 5, characterized in that, The battery pack (1) also includes an adhesive layer (14). The adhesive layer (14) is sandwiched between the body (1211) and the battery cell assembly (11) for bonding the body (1211) and the battery cell assembly (11). Alternatively, the adhesive layer (14) may be sandwiched between the side plate (122) and the battery cell assembly (11) to bond the side plate (122) and the battery cell assembly (11).

8. The battery pack (100) according to claim 1, characterized in that, The end plate (121) also includes a fixing hole (1214). The fixing hole (1214) is spaced apart from the connecting hole (1213), and the fixing hole (1214) penetrates the body (1211) along the third direction (Z). The fixing hole (1214) is suitable for installing a second fastener (1215).

9. The battery pack (100) according to claim 1 or 8, characterized in that, The end plate (121) also includes a lifting hole (1216); the lifting hole (1216) is located on the end face of the body (1211) away from the first guide structure (1212), and the lifting hole (1216) is suitable for installing a hook (3).

10. The battery pack (100) according to claim 8, characterized in that, The crossbeam (21) also includes a fixing groove (213); the fixing groove (213) is located on the end face of the crossbeam (21) facing the body (1211), the fixing groove (213) and the second connecting groove (212) are spaced apart from each other, and the fixing groove (213) is arranged opposite to the fixing hole (1214) along the third direction (Z); The battery pack (100) also includes a second fastener (1215), which is installed in the fixing hole (1214) and the fixing groove (213) to fix the crossbeam (21) to the body (1211).

Images