阅读说明：本技术 电池包 (Battery pack ) 是由 侯光华 黄绍林 成玲 刘克勤 江金源 王宝鸡 于 2020-12-30 设计创作，主要内容包括：本发明提供了一种电池包,包括：箱体；电池模组,设置在箱体内,电池模组呈长方体状；多个折弯件,电池模组的端部通过折弯件安装在箱体内,其中,至少一个折弯件沿电池模组的长度方向和/或宽度方向位置可调节的设置,每个折弯件包括折弯本体以及设置在折弯本体上的硅胶件,硅胶件位于折弯本体和电池模组的端部之间。本申请的技术方案有效地解决了相关技术中的泡棉挤压电池模组的固定方式,导致安装繁琐的问题。(The present invention provides a battery pack, including: a box body; the battery module is arranged in the box body and is cuboid; the end part of the battery module is installed in the box body through the bending piece, wherein at least one bending piece is arranged in a position adjustable along the length direction and/or the width direction of the battery module, each bending piece comprises a bending body and a silica gel piece arranged on the bending body, and the silica gel piece is located between the bending body and the end part of the battery module. The technical scheme of this application has solved the fixed mode of the cotton extrusion battery module of bubble among the correlation technique effectively, leads to the loaded down with trivial details problem of installation.)

1. A battery pack, comprising:

a case (10);

the battery module (20) is arranged in the box body (10), and the battery module (20) is cuboid;

the battery module bending device comprises a plurality of bending pieces (30), wherein the end part of the battery module (20) is installed in a box body (10) through the bending pieces (30), at least one bending piece (30) is arranged in a position adjustable along the length direction and/or the width direction of the battery module (20), each bending piece (30) comprises a bending body (31) and a silica gel piece (32) arranged on the bending body (31), and the silica gel piece (32) is located between the bending body (31) and the end part of the battery module (20).

2. The battery pack according to claim 1,

the bending angle of the bending piece (30) is 90 degrees;

four corners formed by every two adjacent surfaces of the battery module (20) are respectively provided with one bending piece (30), and the distance between the opposite surfaces of the two silica gel pieces (32) arranged along the width direction of the battery module (20) is smaller than the width of the battery module (20).

3. The battery pack according to claim 1, wherein the bent body (31) is connected to the silicone part (32) by means of a plug-in connection (50).

4. The battery pack according to claim 3,

the inserting structure (50) comprises a first convex rib (51) and a first slot (52) matched with the first convex rib (51), the first convex rib (51) is arranged on the bending body (31), and the first slot (52) is arranged on the silica gel piece (32);

the inserting structure (50) further comprises a second convex rib (53) and a second inserting groove (54) matched with the second convex rib (53), the second convex rib (53) is arranged on the silica gel piece (32), and the second inserting groove (54) is arranged on the bending body (31).

5. The battery pack according to claim 4,

the first convex rib (51) and the first slot (52) are both in a strip shape, the first convex rib (51) is arranged on the outer side of the second slot (54) in a surrounding manner, and the first slot (52) is arranged on the outer side of the second convex rib (53) in a surrounding manner;

the first insertion groove (52) has a groove depth greater than that of the second insertion groove (54).

6. The battery pack according to any one of claims 1 to 5, wherein the bending body (31) comprises a first plate body (311) and a second plate body (312) connected with the first plate body (311), and an inner concave portion (314) is arranged on one side of the second plate body (312) far away from the battery module (20).

7. The battery pack according to claim 6, wherein the silicone part (32) is bent, the silicone part (32) comprises a third plate body (321) and a fourth plate body (322) connected with the third plate body (321), the third plate body (321) is arranged corresponding to the first plate body (311), the fourth plate body (322) is arranged corresponding to the second plate body (312), and a plurality of bosses (323) are arranged on one side of the third plate body (321) and/or the fourth plate body (322) away from the bent body (31);

one side of the silica gel piece (32) facing the battery module (20) is provided with a recess (324), and the recess (324) is located at the connection position of the third plate body (321) and the fourth plate body (322).

8. The battery pack according to claim 7, wherein the first plate body (311) has a width greater than a width of the second plate body (312); the width of the third plate body (321) is greater than the width of the fourth plate body (322).

9. The battery pack according to any one of claims 1 to 5,

the battery pack further comprises a first end cover (61) and a second end cover (62) which are oppositely arranged, the first end cover (61) is arranged between the box body (10) and the first end of the battery module (20), the second end cover (62) is arranged between the box body (10) and the second end of the battery module (20), one part of the bending pieces (30) is arranged on the first end cover (61) at intervals, and the other part of the bending pieces is arranged on the second end cover (62) at intervals;

a first interval is arranged between the bent piece (30) arranged on the first end cover (61) and the first end cover (61), and a second interval is arranged between the bent piece (30) arranged on the second end cover (62) and the second end cover (62).

10. The battery pack according to claim 9, further comprising a pin member (63), wherein a connection through hole (313) is formed at the bending position of the bending body (31), a first mounting hole corresponding to the connection through hole (313) is formed in the first end cover (61), and the pin member (63) is inserted into the first mounting hole and the connection through hole (313).

11. The battery pack according to claim 9, further comprising a bracket (70) disposed on an inner side wall of the case (10), wherein the first end cap (61) and/or the second end cap (62) is/are provided with a second mounting hole (612), the bracket (70) is provided with a third mounting hole (71) corresponding to the second mounting hole (612), and the battery pack further comprises a fastener (64), wherein the fastener (64) is movably disposed in the second mounting hole (612) and the third mounting hole (71) to adjust a distance between the first end cap (61) and the second end cap (62).

Technical Field

The invention relates to the technical field of energy storage, in particular to a battery pack.

Background

In the related art, the cylindrical batteries are model numbers 18650, 32650, and 32140. The model has small volume, flexible serial-parallel connection and rapidly expanded application range. In order to reduce the cost and improve the competitiveness, the adaptation is gradually marketized and standardized. The accessories of cylindrical batteries also tend to be universal, such as nickel sheets, battery supports and the like. A plurality of cylinder batteries are the array and arrange and constitute battery module, and battery module sets up in the box, is provided with battery holder in the box and is used for fixed battery module.

However, in general, it is not firm to fix the battery module only by using the battery holder, and the EVA foam is extruded in the gaps among the battery holder, the case, and the battery module, and such a fixing method has the following problems:

1) because the compression ratio that the EVA foam is suitable for hardness can not effective control, the installation is loaded down with trivial details, and is efficient.

2) The battery module is fixed with the cotton compression of bubble, and fixed strength is low, and shock resistance is poor, has the potential safety hazard.

Disclosure of Invention

The invention mainly aims to provide a battery pack to solve the problem of complex installation caused by a fixing mode of extruding a battery module by foam in the related art.

In order to achieve the above object, the present invention provides a battery pack including: a box body; the battery module is arranged in the box body and is cuboid; the end part of the battery module is installed in the box body through the bending piece, wherein at least one bending piece is arranged in a position adjustable along the length direction and/or the width direction of the battery module, each bending piece comprises a bending body and a silica gel piece arranged on the bending body, and the silica gel piece is located between the bending body and the end part of the battery module.

Further, the bending angle of the bending piece is 90 degrees; four corners formed by every two adjacent surfaces of the battery module are respectively provided with a bending piece, and the distance between the opposite surfaces of the two silica gel pieces arranged in the width direction of the battery module is smaller than the width of the battery module.

Further, the body of bending is connected with silica gel spare through grafting structure.

Furthermore, the inserting structure comprises a first convex rib and a first slot matched with the first convex rib, the first convex rib is arranged on the bending body, and the first slot is arranged on the silica gel part; the inserting structure further comprises a second convex rib and a second inserting groove matched with the second convex rib, the second convex rib is arranged on the silica gel piece, and the second inserting groove is arranged on the bending body.

Furthermore, the first convex rib and the first slot are both in a strip shape, the first convex rib is arranged around the outer side of the second slot, and the first slot is arranged around the outer side of the second convex rib; the groove depth of the first slot is larger than that of the second slot.

Furthermore, the body of bending includes first plate body and the second plate body of being connected with first plate body, and one side that battery module was kept away from to the second plate body is provided with interior concave part.

Furthermore, the silica gel piece is bent, the silica gel piece comprises a third plate body and a fourth plate body connected with the third plate body, the third plate body is arranged corresponding to the first plate body, the fourth plate body is arranged corresponding to the second plate body, and a plurality of bosses are arranged on one side, far away from the bent body, of the third plate body and/or the fourth plate body; one side of the silica gel piece towards the battery module is provided with a recess, and the recess is located at the joint of the third plate body and the fourth plate body.

Further, the width of the first plate body is larger than that of the second plate body; the width of the third plate body is greater than that of the fourth plate body.

The battery pack further comprises a first end cover and a second end cover which are oppositely arranged, the first end cover is arranged between the box body and the first end of the battery module, the second end cover is arranged between the box body and the second end of the battery module, one part of the bending pieces is arranged on the first end cover at intervals, and the other part of the bending pieces is arranged on the second end cover at intervals; a first interval is arranged between the bending piece arranged on the first end cover and the first end cover, and a second interval is arranged between the bending piece arranged on the second end cover and the second end cover.

Furthermore, the battery pack further comprises a pin shaft piece, a connecting through hole is formed in the bending position of the bending body, a first mounting hole corresponding to the connecting through hole is formed in the first end cover, and the pin shaft piece is arranged in the first mounting hole and the connecting through hole in a penetrating mode.

Further, the battery package is still including setting up the support on the inside wall of box, is provided with the second mounting hole on first end cover and/or the second end cover, is provided with the third mounting hole that corresponds the setting with the second mounting hole on the support, and the battery package still includes the fastener, and the fastener is movably worn to establish in second mounting hole and the third mounting hole to adjust the distance between first end cover and the second end cover.

By applying the technical scheme of the invention, the battery pack comprises: the battery module comprises a box body, a battery module and a plurality of bending pieces. The battery module is arranged in the box body and is cuboid. The end part of the battery module is arranged in the box body through a bending piece. Wherein, at least one piece of bending is along the adjustable setting of length direction and/or width direction position of battery module. Every piece of bending is including the body of bending and set up the silica gel spare on the body of bending, and the silica gel spare is located between the tip of the body of bending and battery module. One end of the battery module is abutted against the inner wall of the box body through the bending piece, and the bending piece on the other end of the battery module is adjusted along the length direction and/or the width direction of the battery module, so that the distance between two bending pieces which are oppositely arranged along the length direction and/or the width direction of the battery module is gradually reduced. Simultaneously, because the silica gel spare is located between the tip of bending body and battery module, the silica gel spare receives extrusion deformation, so that the silica gel spare exerts outside holding power to two lateral walls of the body of bending, so that two lateral walls of the body of bending are the form of opening, the silica gel spare can closely laminate on the surface of battery module, can adjust the compression ratio of silica gel spare this moment, make the compression ratio that the silica gel spare is fit for hardness can effectual control, use a plurality of pieces of bending to replace the cotton fixed mode of bubble among the correlation technique, the installation has been simplified, be convenient for fixed. Consequently, the technical scheme of this application has solved the fixed mode of the cotton extrusion battery module of bubble among the correlation technique effectively, leads to the loaded down with trivial details problem of installation. And, silica gel spare fixed strength is high, and shock resistance is higher, avoids battery module to have the potential safety hazard.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows a schematic top view of an embodiment of a battery pack according to the invention during installation;

fig. 2 shows an enlarged schematic view at a of the battery pack of fig. 1;

fig. 3 shows a schematic top view of the battery pack of fig. 1;

fig. 4 shows an enlarged schematic view at B of the battery pack of fig. 3;

fig. 5 is an exploded view schematically illustrating the battery pack of fig. 1;

FIG. 6 is a perspective view of the box and a plurality of bending members of FIG. 1;

FIG. 7 shows a perspective view of the plurality of bends and the first end cap of FIG. 1;

figure 8 shows a schematic perspective view of the bending piece of figure 1;

figure 9 shows an exploded view of the bending member of figure 8;

FIG. 10 shows a perspective view of the bent body of FIG. 8;

FIG. 11 shows a perspective view of the silicone piece of FIG. 8;

FIG. 12 shows a schematic perspective view of another angle of the silicone piece of FIG. 8;

FIG. 13 shows a schematic perspective view of another angle of the first end cap of FIG. 1; and

fig. 14 illustrates a perspective view of the battery module of fig. 1.

Wherein the figures include the following reference numerals:

10. a box body; 20. a battery module; 21. a cylindrical battery; 22. a first battery holder; 23. a second battery holder; 24. heat shrink tubing; 30. bending a piece; 31. bending the body; 311. a first plate body; 312. a second plate body; 313. a connecting through hole; 314. an inner concave portion; 32. a silicone member; 321. a third plate body; 322. a fourth plate body; 323. a boss; 324. recessing; 50. a plug-in structure; 51. a first rib; 52. a first slot; 53. a second rib; 54. a second slot; 61. a first end cap; 612. a second mounting hole; 614. an end cap body; 615. bending the reinforcing sheet; 616. a fourth mounting hole; 62. a second end cap; 63. a pin member; 64. a fastener; 70. a support; 71. a third mounting hole; 80. a box cover; 91. a high voltage connector interface; 92. a communication connector interface.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

As shown in fig. 1 to 9, the battery pack of the present embodiment includes: the battery module includes a case 10, a battery module 20, and a plurality of bending members 30. The battery module 20 is disposed in the case 10, and the battery module 20 has a rectangular parallelepiped shape. The end of the battery module 20 is mounted in the case 10 by the bent piece 30. Wherein, at least one bending piece 30 is arranged along the length direction of the battery module 20 in an adjustable manner. Each of the bending pieces 30 includes a bending body 31 and a silicone piece 32 disposed on the bending body 31, and the silicone piece 32 is located between the bending body 31 and the end of the battery module 20.

By applying the technical scheme of the embodiment, one end of the battery module 20 is abutted against the inner wall of the box body 10 through the bending piece 30, and the bending piece 30 on the other end of the battery module 20 is adjusted along the length direction of the battery module 20, so that the distance between two bending pieces 30 oppositely arranged along the length direction of the battery module 20 is gradually reduced. Simultaneously, because silica gel spare 32 is located between the tip of bending body 31 and battery module 20, silica gel spare 32 receives extrusion deformation, so that silica gel spare 32 applys outside holding power to two lateral walls of bending body 31, so that two lateral walls of the body of bending are the form of opening, silica gel spare 32 can closely laminate on battery module 20's surface, can adjust the compression ratio of silica gel spare 32 this moment, make the compression ratio that silica gel spare 32 is fit for hardness can effectual control, use a plurality of pieces of bending 30 to replace the cotton fixed mode of bubble among the correlation technique, the installation has been simplified, and it is convenient for fix. Therefore, the technical scheme of this embodiment has solved the cotton fixed mode who extrudees battery module of bubble among the correlation technique effectively, leads to the loaded down with trivial details problem of installation. And, silica gel spare 32 fixed strength is high, and shock resistance is higher, avoids battery module to have the potential safety hazard. The hardness of the silicone element 32 of the present embodiment is preferably 70 degrees shore.

Of course, in the embodiment not shown in the drawings, the bending pieces at the other end of the battery module may be adjusted in the length direction and the width direction of the battery module such that the distance between two bending pieces oppositely disposed in the length direction and the width direction of the battery module is gradually reduced. Or the bending piece on the other end of the battery module can be adjusted along the width direction of the battery module, so that the distance between two bending pieces oppositely arranged along the width direction of the battery module is gradually reduced.

As shown in fig. 7 and 8, the bending angle of the bending piece 30 is 90 degrees so that the bending piece 30 can be attached to the surface of the battery module 20. Like this, the shape of the piece of bending 30 and the shape looks adaptation of the adjacent two surfaces of battery module 20 formation angle, the two lateral walls of the piece of bending 30 of being convenient for compress tightly the tip of battery module 20, can be convenient for bend 30 and retrain battery module 20 fast, like this, it is fixed convenient and firm. Four corners formed by every two adjacent surfaces of the battery module 20 are respectively provided with one bending piece 30, and the distance between the opposite surfaces of two silica gel pieces 32 arranged along the width direction of the battery module 20 is smaller than the width of the battery module 20. Thus, the two silicone members 32 can be tightly attached to the surface of the battery module 20, and the battery module 20 is effectively pressed and fixed more firmly.

As shown in fig. 8 to 12, the bending body 31 is connected to the silicone member 32 through an insertion structure 50 for easy installation and easy processing. Therefore, the bending body 31 and the silica gel piece 32 are conveniently processed respectively, the processing technology is simplified, and the processing efficiency is improved.

As shown in fig. 8 to 12, in order to facilitate the demolding and the machining, the inserting structure 50 includes a first rib 51 and a first slot 52 engaged with the first rib 51. The first rib 51 is disposed on the bending body 31, and the first slot 52 is disposed on the silicone member 32. In order to facilitate the demolding and the forming, the inserting structure 50 further includes a second rib 53 and a second slot 54 engaged with the second rib 53. The second rib 53 is disposed on the silicone rubber member 32, and the second slot 54 is disposed on the bending body 31. Meanwhile, the first convex rib 51 and the second convex rib 54 are both arranged on the bending body 31, and the first slot 52 and the second convex rib 53 are both arranged on the silica gel piece 32, so that the installation is more compact and reliable when the bending body 31 is connected with the silica gel piece 32 in an inserting manner.

As shown in fig. 8 to 12, in order to improve the tightness of the plug connection with the silicone element 32, the first rib 51 and the first slot 52 are both in a strip shape, the first rib 51 is enclosed outside the second slot 54, and the first slot 52 is enclosed outside the second rib 53. Like this, bend body 31 and silica gel piece 32 installation back border department and do not have protruding and sunken phenomenon to there is not the clearance between the two, the connection effect is more stable. The first slot 52 has a greater groove depth than the second slot 54. Like this, the border of the body 31 of bending and the border of silica gel piece 32 are more inseparable with laminating, are favorable to making whole piece 30 of bending exert the extrusion force to the tip of battery module 20, and then have guaranteed the laminating effect of the piece 30 of bending. The first rib 51, the first slot 52, the second rib 53, and the second slot 54 of the present embodiment have rectangular cross-sectional shapes. Thus, the first rib 51 is tightly pressed into the first slot 52, and the second rib 53 is also tightly pressed into the second slot 54. The surfaces of third plate 321 and fourth plate 322 facing the bending direction are free from protrusions and depressions.

As shown in fig. 8 to 12, specifically, the bending body 31 is made of an aluminum die casting mold. The first rib 51 is a peripheral square protrusion located at the edge close to the bending body 31, and the first slot 52 is a peripheral square groove located at the edge close to the silicone piece 32. Thus, the first rib 51 can be completely inserted into the first slot 52, so that the bent body 31 is abutted against the surface of the silicone rubber piece 32, and the connection effect is improved.

As shown in fig. 9 and 10, the bending body 31 includes a first plate 311 and a second plate 312 connected to the first plate 311. Under the condition that the silicone rubber piece 32 presses and bends the body 31 to cause the first plate 311 and the second plate 312 to be opened outwards, the second plate 312 is prevented from interfering with the box body 10, and an inner concave portion 314 is arranged on one side of the second plate 312 away from the battery module 20.

As shown in fig. 8 to 12, the silicone rubber 32 is bent, and the silicone rubber 32 includes a third plate 321 and a fourth plate 322 connected to the third plate 321. The third plate 321 is disposed corresponding to the first plate 311, and the fourth plate 322 is disposed corresponding to the second plate 312. Thus, the shape of the silicone piece 32 is matched with that of the bent body 31, and the installation and the processing are convenient. A plurality of bosses 323 are disposed on both sides of the third plate 321 and the fourth plate 322 away from the bending body 31. The arrangement of the plurality of bosses 323 can increase the friction force between the silicone piece 32 and the end part of the battery module 20 and improve the compression effect; on the other hand, when the surface of the end of the battery module 20 is uneven, a portion of the plurality of bosses 323 can be inserted into the end of the battery module 20 and tightly attached to the surface of the end of the battery module 20, effectively restraining the battery module 20. The shape of the boss 323 of the present embodiment is preferably a rectangular parallelepiped. Thus, the cuboid boss 323 enables the bending piece 30 to have a good pressing effect and a good restraining effect.

Of course, in an embodiment not shown in the drawings, a side of the third plate body or the fourth plate body away from the bending body may be provided with a plurality of bosses.

Specifically, a plurality of bosses 323 are arranged in an array on a side surface of the fourth plate 322 away from the bending body 31. In this way, it is convenient to set the compression ratio of the silicone member 32 reasonably.

As shown in fig. 8, 9 and 11, a recess 324 is formed on a side of the silicone member 32 facing the battery module 20, and the recess 324 is located at a connection position of the third plate 321 and the fourth plate 322, so that the recess 324 can avoid a corresponding corner of the battery module 20, and the third plate 321 and the fourth plate 322 can better fit and press on an end surface of an end portion of the battery module 20. The junction between the surfaces of the recess 324 transitions smoothly.

As shown in fig. 5 to 9, the width of the first plate body 311 is greater than the width of the second plate body 312. The width of third plate 321 is greater than the width of fourth plate 322. In this way, the first plate 311 is pressed against one side of the battery module 20 in the longitudinal direction, the second plate 312 is pressed against one side of the battery module 20 in the width direction, the third plate 321 is pressed against one side of the battery module 20 in the longitudinal direction, and the fourth plate 322 is pressed against one side of the battery module 20 in the width direction. Therefore, materials are reasonably utilized, and the processing cost of the bending piece 30 is lower.

As shown in fig. 5 to 7, in order to facilitate installation and arrangement of the plurality of bent pieces 30 in the case 10, the battery pack further includes a first end cap 61 and a second end cap 62 which are oppositely disposed, and the first end cap 61 is disposed between the case 10 and the first end of the battery module 20. The second end cap 62 is disposed between the case 10 and the second end of the battery module 20. One part of the plurality of bent pieces 30 is arranged on the first end cover 61 at intervals, and the other part is arranged on the second end cover 62 at intervals. The first end cap 61 is spot welded to the inner end wall of the housing and is welded securely. One of the plurality of bent pieces 30 is four, and the other of the plurality of bent pieces 30 is four. The number of the battery modules 20 is two. That is, four bending pieces 30 are provided at four corners formed by every adjacent two surfaces of one battery module 20.

As shown in fig. 1 to 5, in order to provide each bending member 30 with a sufficient space for deformation and rotation, a first space is provided between the bending member 30 provided on the first end cap 61 and the first end cap 61, and a second space is provided between the bending member 30 provided on the second end cap 62 and the second end cap 62.

As shown in fig. 2, 4, and 7 to 10, the battery pack further includes a pin 63, a connection through hole 313 is formed at a bending position of the bending body 31, a first mounting hole corresponding to the connection through hole 313 is formed in the first end cap 61, and the pin 63 is inserted into the first mounting hole and the connection through hole 313. Install the in-process in box 10 at battery module 20, bend the body 31 and can be in the incomplete restraint state that can rotate around round pin axle spare 63 to make silica gel spare 32 can adjust the mounted position in real time, so that silica gel spare 32 laminates on battery module 20's tip better, avoids silica gel spare 32 to twist, is favorable to improving the life of the piece 30 of bending. The pin member 63 is preferably an M6 socket head cap screw and nut fit. The nut is press-riveted to the first end cap 61. The screw heads of the nut and the M6 alien hexagonal long screw are located on opposite sides of the first end cap 61, respectively. The connection through hole 313 of the present embodiment is preferably a circular hole.

As shown in fig. 1 to 7, in order to facilitate the installation of the second end cap 62 in the case 10, the battery pack further includes a bracket 70 provided on an inner sidewall of the case 10. In order to improve the installation efficiency and facilitate the mass production, the first end cap 61 and the second end cap 62 are both provided with second installation holes 612. The bracket 70 is provided with a third mounting hole 71 corresponding to the second mounting hole 612. The battery pack further includes a fastener 64, and the fastener 64 is movably inserted into the second and third mounting holes 612 and 71 to adjust the distance between the first and second end caps 61 and 62. In this way, when the distance between the first end cap 61 and the second end cap 62 is gradually reduced, the distance between the opposite surfaces of one part of the bending piece 30 on the second end cap 62 and the other part of the bending piece 30 on the first end cap 61 is gradually reduced, and the compression state of the silicone rubber piece 32 can be adjusted to meet the set proportion, so that the battery module 20 is in the set constraint state. At the same time, the second end cap 62 can be secured to the bracket 70 by the fastener 64. The fasteners 64 are preferably socket head cap screws or bolts. The number of the brackets 70 is two, and the two brackets 70 are respectively connected to two ends of the second end cap 62 and fixed by the fastening member 64. The bracket 70 of this embodiment is provided with a fixing hole in which a nut is press-riveted or welded so that a third mounting hole 71 is formed in the nut.

Of course, in the embodiment not shown in the figures, the second end cap is provided with a second mounting hole.

Specifically, as shown in fig. 1 to 7, the first end of the battery module 20 is correspondingly mounted on the inner sides of the two bending pieces 30 oppositely arranged on the inner side of the first end cover 61. In the installation, bend piece 30 and rotate around round pin axle piece 63 and two lateral walls are opening of certain angle, battery module 20 is according to the arrow point direction installation pretension that makes progress in fig. 1, second end cover 62 is through the fastening force of fastener 64 crescent in order to be in the state of tightening, two on the second end cover 62 bend piece 30 also gradually with battery module 20 the second end the relative two angles that set up of end be in the right angle laminating state, fastener 64 is in make second end cover 62 fix completely on support 70 after tightening the state completely, and then two on the first end cover 61 bend piece 30 and the second end cover 62 bend piece 30 respectively with the four corners of a battery module 20 completely in the laminating state. As shown in fig. 2, 4, 7, and 8, each of the first and second end caps 61 and 62 includes an end cap body 614 and a bent reinforcing piece 615 connected to an end of the end cap body 614 along a length direction of the end cap body 614. The end cover body 614 includes an end plate, and an upper side plate and a lower side plate connected to both sides of the end plate, and the bent piece 30 is limited between the upper side plate and the lower side plate, so that the upper end surface of the second plate body 312 of the bent piece 30 is matched with the lower surface of the upper side plate, and the lower end surface of the second plate body 312 of the bent piece 30 is matched with the upper surface of the lower side plate. In this way, the bent piece 30 is confined between the upper side plate and the lower side plate, and the bent piece 30 is prevented from moving in the width direction of the end cover body 614, so that the two oppositely-arranged inner surfaces of the bent piece 30 can be better attached to the end of the battery module 20.

As shown in fig. 14, the battery module 20 includes a plurality of cylindrical batteries 21 arranged in an array, the battery module 20 further includes a first battery support 22, a second battery support 23, and a heat shrink tube 24, the first battery support 22 and the second battery support 23 are respectively located at two ends of the plurality of cylindrical batteries 21, and the heat shrink tube 24 surrounds the first battery support 22, the plurality of cylindrical batteries 21, and the second battery support 23. The heat shrink tube 24 is used for protection of the pole creepage distance of the cylindrical battery 21, and the width thereof can be changed according to the arrangement mode of the busbar. The cylindrical battery 21 of the present embodiment is preferably 18650 in size.

As shown in fig. 6, 7, and 13, each of the first and second end caps 61 and 62 includes an end cap body 614 and a bent reinforcing piece 615 connected to an end of the end cap body 614 in a length direction of the end cap body 614. The second mounting hole 612 is provided in the end cap body 614, and the bent reinforcing piece 615 is provided with a fourth mounting hole 616 corresponding to the second mounting hole 612. The provision of the bent reinforcing pieces 615 can improve the structural strength of the end portion of the end cap body 614. The fastener 64 can also pass through a fourth mounting hole 616. The bent reinforcing pieces 615 are welded to the ends of the end cap body 614. As shown in fig. 5 and 6, the battery pack further includes a case cover 80 covering the opening of the case body 10. The side wall of the box 10 is provided with a high voltage connector port 91 and a communication connector port 92 at intervals.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.