Battery pack

Abstract

The embodiment of the utility model provides a battery pack, and relates to the technical field of batteries. The battery pack comprises a lower shell, a battery cell group, a first battery cell end plate and a first fastener, the battery cell group is arranged on the lower shell, a first kidney-shaped hole is formed in the first battery cell end plate, the first battery cell end plate is arranged on one side of the battery cell group, and the first fastener penetrates through the first kidney-shaped hole and is connected with the lower shell so that the first battery cell end plate can be installed on the lower shell; due to the fact that the first kidney-shaped hole is formed in the first battery cell end plate, the effect of absorbing assembly tolerance can be achieved, a first fastener can conveniently penetrate through the first battery cell end plate to be connected with the lower shell, installation of the first battery cell end plate is achieved, and then the installation process of the end plate of the battery pack is conveniently completed.

Description

Technical Field

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

[0002] In the prior art, when the end plate of the battery pack is installed on the lower shell, it is easy for the connection holes of the end plate and the connection holes of the lower shell to become misaligned, and then the bolts cannot pass through the connection holes of the end plate and connect with the connection holes of the lower shell, resulting in assembly difficulties. Utility Model Content

[0003] The utility model provides a battery pack, which can facilitate the installation of an end plate of the battery pack.

[0004] The embodiment of the present utility model can be implemented as follows:

[0005] The utility model provides a battery pack, comprising:

[0006] lower shell;

[0007] A battery cell group, the battery cell group being arranged in the lower shell;

[0008] A first cell end plate, the first cell end plate being provided with a first waist-shaped hole, and the first cell end plate being arranged on one side of the cell group; and

[0009] A first fastener is passed through the first waist-shaped hole and connected to the lower shell to install the first battery cell end plate on the lower shell.

[0010] In an optional embodiment, the first battery cell end plate includes an end plate structure and an epoxy plate, the epoxy plate is connected to the end plate structure, and the epoxy plate is located between the end plate structure and the battery cell group;

[0011] The end plate structure is provided with the first waist-shaped hole, and the first fastener is passed through the first waist-shaped hole and connected to the lower shell to install the end plate structure on the lower shell.

[0012] In an optional embodiment, the end plate structure includes a first plate body and a second plate body connected to each other, the first plate body and the second plate body are distributed at an angle, the first plate body is provided with the first waist-shaped hole, the epoxy plate and the second plate body are connected, and the epoxy plate is located between the second plate body and the battery cell group;

[0013] The first fastener is passed through the first waist-shaped hole and connected to the lower shell to install the first plate on the lower shell.

[0014] In an optional embodiment, the battery pack further includes a T-shaped bar, and the T-shaped bar is provided on one side of the battery cell group;

[0015] The second plate is provided with a connection hole, and the battery pack further includes a second fastener, which is passed through the connection hole and connected to the T-bar.

[0016] In an optional embodiment, there are multiple T-shaped bars, at least some of which are arranged between the battery cells of adjacent battery cell groups, and there are multiple second fasteners, with multiple second fasteners corresponding to multiple T-shaped bars one by one.

[0017] In an optional embodiment, the battery pack further includes a second cell end plate and a third fastener, the second cell end plate is provided with a second waist-shaped hole, and the second cell end plate and the first cell end plate are respectively arranged on opposite sides of the cell group;

[0018] The third fastener is passed through the second waist-shaped hole and connected to the lower shell to install the second battery cell end plate on the lower shell.

[0019] In an optional embodiment, the structure of the second battery cell end plate is the same as that of the first battery cell end plate.

[0020] In an optional embodiment, the battery pack further includes an annular insulating plate, which is disposed on one side of the battery cell of the battery cell group.

[0021] In an optional embodiment, there are multiple annular insulating plates, and at least some of the annular insulating plates are arranged between adjacent battery cells of the battery cell group.

[0022] In an optional embodiment, the number of the first waist-shaped holes and the number of the first fasteners are both multiple, and the multiple waist-shaped holes and the multiple first fasteners correspond one to one.

[0023] The beneficial effects of the battery pack of the embodiment of the present utility model include, for example:

[0024] The utility model provides a battery pack, which includes a lower shell, a battery cell group, a first battery cell end plate and a first fastener. The battery cell group is arranged in the lower shell, the first battery cell end plate is provided with a first waist-shaped hole, the first battery cell end plate is arranged on one side of the battery cell group, the first fastener is passed through the first waist-shaped hole and is connected to the lower shell to install the first battery cell end plate in the lower shell. Since the first battery cell end plate is provided with the first waist-shaped hole, the effect of absorbing assembly tolerance can be achieved, which facilitates the first fastener to pass through the first battery cell end plate and the lower shell for connection, thereby realizing the installation of the first battery cell end plate, and further facilitating the completion of the installation process of the end plate of the battery pack (i.e., the first battery cell end plate). BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 A schematic diagram of a battery pack provided in an embodiment of the present utility model;

[0027] Figure 2 for Figure 1 A partial enlarged view of the battery pack;

[0028] Figure 3 An exploded view of a battery pack provided in an embodiment of the present invention;

[0029] Figure 4 This is a first schematic diagram of the end plate structure provided in an embodiment of the present utility model;

[0030] Figure 5 This is a second schematic diagram of the end plate structure provided in an embodiment of the present utility model;

[0031] Figure 6 This is a schematic diagram of the epoxy plate of the first battery cell end plate provided in an embodiment of the present invention.

[0032] Icons: 100-lower shell; 200-battery cell group; 210-battery cell; 300-first battery cell end plate; 301-first waist-shaped hole; 302-connecting hole; 310-end plate structure; 320-first plate body; 330-second plate body; 340-epoxy plate; 350-plastic rivet; 400-second battery cell end plate; 510-first fastener; 520-second fastener; 600-T-bar; 700-annular insulating plate. DETAILED DESCRIPTION

[0033] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are intended to fall within the scope of protection of the present invention.

[0035] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0036] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when in use. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0037] In addition, the terms "first", "second", etc., if used, are merely used to distinguish and describe, and should not be understood as indicating or implying relative importance.

[0038] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention can be combined with each other.

[0039] In the power battery industry, the new energy vehicle battery pack is a complex integrated system. Generally, different battery cell shapes have different grouping methods. The current module-free square battery cell arrangement adopts an integrated structural method, simplifies the entire package structure, improves the grouping process, improves the grouping efficiency, and effectively reduces costs. Based on the above advantages, the module-free arrangement of square batteries has been absorbed and adopted by major OEMs and battery pack companies, and is widely used in the development and production of various projects.

[0040] In the prior art, when the end plate of the battery pack is installed on the lower shell, it is easy for the connection holes of the end plate and the connection holes of the lower shell to become misaligned, and then the bolts cannot pass through the connection holes of the end plate and connect with the connection holes of the lower shell, resulting in assembly difficulties.

[0041] In view of this, please refer to Figures 1-6 The battery pack provided in the embodiment of the present invention can solve this problem, which will be described in detail below.

[0042] Please refer to Figure 1-Figure 5In an embodiment of the present invention, a battery pack is provided, which includes a lower shell 100, a battery cell group 200, a first battery cell end plate 300 and a first fastener 510. The battery cell group 200 is arranged in the lower shell 100, and the first battery cell end plate 300 is provided with a first waist-shaped hole 301. The first battery cell end plate 300 is arranged on one side of the battery cell group 200. The first fastener 510 is passed through the first waist-shaped hole 301 and is connected to the lower shell 100 to install the first battery cell end plate 300 on the lower shell 100.

[0043] Since the first battery cell end plate 300 is provided with a first waist-shaped hole 301, the effect of absorbing assembly tolerance can be achieved, which facilitates the first fastener 510 to pass through the first battery cell end plate 300 and connect with the lower shell 100, thereby realizing the installation of the first battery cell end plate 300, and further facilitating the end plate of the battery pack (which can be understood as the above-mentioned first battery cell end plate 300) to complete the installation process.

[0044] In this embodiment, the first fastener 510 can be a bolt. It is easy to understand that the lower shell 100 has a connecting hole connected to the bolt. Since the first battery end plate 300 has a first waist-shaped hole 301, even if the center of the first waist-shaped hole 301 is offset from the center of the connecting hole of the lower shell 100, the bolt can still be connected to the connecting hole of the lower shell 100 after passing through the first waist-shaped hole 301, thereby achieving the effect of absorbing assembly tolerance.

[0045] It should be noted that, in this embodiment, the first battery cell end plate 300 includes an end plate structure 310 and an epoxy plate 340, the epoxy plate 340 and the end plate structure 310 are connected, and the epoxy plate 340 is located between the end plate structure 310 and the battery cell group 200, wherein the end plate structure 310 is provided with a first waist-shaped hole 301, and the first fastener 510 is passed through the waist-shaped hole and connected to the lower shell 100 to install the end plate structure 310 on the lower shell 100.

[0046] Specifically, the end plate structure 310 includes a first plate body 320 and a second plate body 330 connected to each other. The first plate body 320 and the second plate body 330 are distributed at an angle, which can be a right angle. The first plate body 320 is provided with a waist-shaped hole. The epoxy plate 340 and the second plate body 330 are connected. The epoxy plate 340 is located between the second plate body 330 and the battery cell group 200. The first fastener 510 is passed through the first waist-shaped hole 301 and is connected to the lower shell 100 to install the first plate body 320 on the lower shell 100.

[0047] Please refer to Figure 6 The first cell end plate 300 further includes two plastic rivets 350 , which simultaneously penetrate the epoxy plate 340 to fix the epoxy plate 340 on the second plate 330 , thereby improving the convenience and reliability of the epoxy plate 340 constraint.

[0048] In addition, in this embodiment, please refer to Figure 4 and Figure 5 The number of the first waist-shaped holes 301 and the number of the first fasteners 510 are both multiple, and the multiple waist-shaped holes and the multiple first fasteners 510 correspond one to one.

[0049] In addition, please refer to Figure 1-Figure 3 The battery pack also includes a T-shaped bar 600, which is arranged on one side of the battery cell group 200. The second plate 330 is provided with a connecting hole 302. The battery pack also includes a second fastener 520 (a bolt can be selected), which is passed through the connecting hole 302 and connected to the T-shaped bar 600.

[0050] Specifically, there are multiple T-shaped bars 600 , at least some of which are disposed between the battery cells 210 of adjacent battery cell groups 200 . There are multiple second fasteners 520 , and the multiple second fasteners 520 correspond one-to-one to the multiple T-shaped bars 600 .

[0051] It should be noted that all the battery cells 210 of the battery cell group 200 can be distributed in rows and columns, the number of battery cells 210 in each row is less than the number of battery cells 210 in each column, some T-bars 600 can be set between two adjacent columns of battery cells 210, and the remaining two T-bars 600 can be set on the outside of the two outermost columns of battery cells 210 of the battery cell group 200.

[0052] Of course, all the T-shaped bars 600 may also be disposed between two adjacent columns of battery cells 210 .

[0053] In this embodiment, the battery pack also includes a second cell end plate 400 and a third fastener. The second cell end plate 400 is provided with a second waist-shaped hole. The second cell end plate 400 and the first cell end plate 300 are respectively arranged on opposite sides of the cell group 200. The third fastener (a bolt can be selected) is passed through the second waist-shaped hole and connected to the lower shell 100 to install the second cell end plate 400 on the lower shell 100.

[0054] It is easy to understand that the second battery cell end plate 400 can also be understood as the end plate of the battery pack.

[0055] In this embodiment, the structure of the second battery cell end plate 400 is the same as that of the first battery cell end plate 300. The specific structure of the second battery cell end plate 400 can refer to the above description of the first battery cell end plate 300. At the same time, since the second battery cell end plate 400 has a second waist-shaped hole, it can also achieve the effect of absorbing assembly tolerances. The specific principle can refer to the description of the above-mentioned first waist-shaped hole 301, which will not be repeated here.

[0056] Of course, the battery pack also includes a fourth fastener (bolts can be selected). The number of the fourth fasteners can be the same as the third fasteners. Each fourth fastener passes through the second battery cell end plate 400 and is also connected to each T-bar 600.

[0057] In addition, the battery pack also includes an annular insulating plate 700, which has a rectangular ring structure. The annular insulating plate 700 is arranged on one side of the battery cell 210 of the battery cell group 200. Specifically, there are multiple annular insulating plates 700, and at least some of the annular insulating plates 700 are arranged between adjacent battery cells 210 of the battery cell group 200.

[0058] It is easy to understand that a certain number of annular insulating plates 700 can be arranged between adjacent battery cells 210 in each column of battery cells 210 of the battery cell group 200. Since the annular insulating plate 700 has an annular structure, an escape space is defined on the inner side of the annular insulating plate 700. When the battery cell 210 expands, the expanded part can enter the escape space to avoid squeezing the adjacent battery cell 210, which is equivalent to the annular insulating plate 700 being able to synchronously absorb the expansion of the battery cell 210.

[0059] During the assembly of the battery pack: first, the end plate structure 310 and the epoxy plate 340 of the first battery cell end plate 300 and the end plate structure 310 and the epoxy plate 340 of the second battery cell end plate 400 can be pre-fixed by plastic rivets 350, and then the first battery cell end plate 300 is pre-fixed on the lower shell 100 by the first fastener 510, and the battery cells 210 of the battery cell group 200 and the annular insulating plate 700 are arranged in sequence, and then the T-bar and the second fastener 520 are installed accordingly to complete the assembly constraint of the first battery cell end plate 300 and the T-bar, and then the second battery cell end plate 400 is placed in the lower shell 100, and the first battery cell end plate 300, the battery cell group 200 and the second battery cell end plate 400 are squeezed as a whole, and then the T-bar and the fourth fastener are installed accordingly. Finally, the second battery cell end plate 400 is fixed to the lower shell 100 by the third fastener.

[0060] To sum up, the battery pack includes a lower shell 100, a cell group 200, a first cell end plate 300 and a first fastener 510. The cell group 200 is arranged in the lower shell 100. The first cell end plate 300 is provided with a first waist-shaped hole 301. The first cell end plate 300 is arranged on one side of the cell group 200. The first fastener 510 is passed through the first waist-shaped hole 301 and is connected to the lower shell 100 to install the first cell end plate 300 on the lower shell 100.

[0061] The design of the first cell end plate 300 having the first waist-shaped hole 301 can also achieve the effect of absorbing assembly tolerance, making it easy to pass the first fastener 510 through the first cell end plate 300 and connect it with the lower shell 100 to achieve the installation of the first cell end plate 300.

[0062] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A battery pack, characterized in that: include: Lower housing (100); A battery cell group (200), the battery cell group (200) being arranged on the lower housing (100); a first battery cell end plate (300), the first battery cell end plate (300) being provided with a first waist-shaped hole (301), and the first battery cell end plate (300) being arranged on one side of the battery cell group (200); as well as A first fastener (510) is provided in the first waist-shaped hole (301) and is connected to the lower housing (100) to mount the first battery cell end plate (300) on the lower housing (100).

2. The battery pack according to claim 1, wherein: The first battery cell end plate (300) comprises an end plate structure (310) and an epoxy plate (340), the epoxy plate (340) and the end plate structure (310) are connected, and the epoxy plate (340) is located between the end plate structure (310) and the battery cell group (200); The end plate structure (310) is provided with the first waist-shaped hole (301), and the first fastener (510) is passed through the first waist-shaped hole (301) and connected to the lower shell (100) to install the end plate structure (310) on the lower shell (100).

3. The battery pack according to claim 2, wherein: The end plate structure (310) comprises a first plate body (320) and a second plate body (330) connected to each other, the first plate body (320) and the second plate body (330) being distributed at an angle, the first plate body (320) being provided with the first waist-shaped hole (301), the epoxy plate (340) and the second plate body (330) being connected, and the epoxy plate (340) being located between the second plate body (330) and the battery cell group (200); The first fastener (510) is passed through the first waist-shaped hole (301) and connected to the lower shell (100) to install the first plate (320) on the lower shell (100).

4. The battery pack according to claim 3, wherein: The battery pack further comprises a T-shaped bar (600), wherein the T-shaped bar (600) is arranged on one side of the battery cell group (200); The second plate (330) is provided with a connection hole (302), and the battery pack further includes a second fastener (520), wherein the second fastener (520) is passed through the connection hole (302) and connected to the T-shaped bar (600).

5. The battery pack according to claim 4, characterized in that: There are a plurality of T-shaped bars (600), and at least some of the T-shaped bars (600) are arranged between the battery cells (210) of adjacent battery cell groups (200). There are a plurality of second fasteners (520), and the plurality of second fasteners (520) and the plurality of T-shaped bars (600) correspond one to one.

6. The battery pack according to claim 1, wherein: The battery pack further comprises a second battery cell end plate (400) and a third fastener, the second battery cell end plate (400) being provided with a second waist-shaped hole, and the second battery cell end plate (400) and the first battery cell end plate (300) being respectively arranged on opposite sides of the battery cell group (200); The third fastener is passed through the second waist-shaped hole and connected to the lower housing (100) to mount the second battery cell end plate (400) on the lower housing (100).

7. The battery pack according to claim 6, characterized in that: The structure of the second battery cell end plate (400) is the same as that of the first battery cell end plate (300).

8. The battery pack according to claim 1, wherein: The battery pack further comprises an annular insulating plate (700), wherein the annular insulating plate (700) is arranged on one side of the battery cell (210) of the battery cell group (200).

9. The battery pack according to claim 8, characterized in that: There are multiple annular insulating plates (700), and at least some of the annular insulating plates (700) are arranged between adjacent battery cells (210) of the battery cell group (200).

10. The battery pack according to claim 1, wherein: The number of the first waist-shaped holes (301) and the number of the first fasteners (510) are both multiple, and the multiple waist-shaped holes and the multiple first fasteners (510) correspond one to one.

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