Battery shell assembly and battery

Abstract

The utility model relates to the technical field of batteries, in particular to a battery shell assembly and a battery, the battery shell assembly comprises a battery shell, and the battery shell is provided with an end plate; the end plate is clamped on the plastic part, the plastic part comprises a first plastic part and a second plastic part, the first plastic part and / or the second plastic part are / is connected with the end plate through ultrasonic hot melting, and at least one tab shaping structure is arranged on one side, deviating from the end plate, of the second plastic part. The tab shaping structure can be used for shaping the tabs of the battery when the tabs are folded, so that the tabs are prevented from being in electric contact with the battery shell. According to the utility model, the space utilization rate of the battery shell can be improved, and short circuit between the tabs and the battery shell can be avoided.

Description

Technical Field

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

[0002] Batteries play a crucial role in our daily lives. Traditional batteries have internal plastic components, with the upper plastic part located outside the cover, the lower plastic part higher, and the terminals and connectors located inside the battery casing, which hinders internal space utilization. Furthermore, the tabs, when bent and folded, have poor shape and can easily come into contact with the battery casing, causing short circuits.

[0003] Therefore, a battery housing assembly and a battery are needed to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide a battery housing assembly and a battery, which can improve the space utilization of the battery housing and avoid short circuit between the tab and the battery housing.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] A battery housing assembly comprising:

[0007] a battery housing having end plates;

[0008] Plastic part, the end plate is clamped on the plastic part, the plastic part includes a first plastic part and a second plastic part, the first plastic part and / or the second plastic part is connected to the end plate by ultrasonic hot melting, and the second plastic part is provided with at least one tab shaping structure on the side away from the end plate, and the tab shaping structure can shape the tab of the battery when it is retracted to prevent the tab from electrically contacting the battery shell.

[0009] In some embodiments, a connecting hole is provided on the end plate, and the first plastic part and / or the second plastic part has a plastic protrusion, the plastic protrusion is located in the connecting hole, and the plastic protrusion can be connected to the connecting hole by ultrasonic hot melting.

[0010] In some embodiments, the connecting hole is a vertical blind hole, an inclined hole or a stepped blind hole.

[0011] In some embodiments, a first tab through hole is provided on the end plate, a second tab through hole is provided on the first plastic part, and a third tab through hole is provided on the second plastic part. The first tab through hole, the second tab through hole and the third tab through hole are arranged relative to each other, and the tab can pass through the third tab through hole, the first tab through hole and the second tab through hole in sequence and extend out.

[0012] In some embodiments, an explosion-proof valve is provided on the end plate.

[0013] In some embodiments, a liquid injection hole is provided on the shell.

[0014] In some embodiments, a mounting groove is provided on the side of the end plate facing away from the second plastic part, the first plastic part is located in the mounting groove, and the distance between the side of the first plastic part facing away from the second plastic part and the groove opening of the mounting groove is -1H-0.5H, where H is the thickness of the end plate.

[0015] In some embodiments, the first plastic part has a flange edge, and the width of the flange edge is 0mm-10mm.

[0016] In some embodiments, the first plastic part and the second plastic part are an integrated structure or a split structure.

[0017] A battery comprises a battery cell and the battery housing assembly as described above, wherein the battery cell is arranged in the battery housing assembly.

[0018] Beneficial effects of the utility model:

[0019] The utility model provides a battery shell assembly, wherein the battery shell has an end plate, the end plate is clamped between a first plastic part and a second plastic part, the lower end face of the second plastic part is provided with at least one tab shaping structure, and the first plastic part and / or the second plastic part are connected to the end plate by ultrasonic heat fusion. By providing the tab shaping structure on the second plastic part, during the battery assembly process, the tab shaping structure can shape the tabs of the battery when they are retracted to prevent the tabs from making electrical contact with the battery shell, thereby ensuring the effect of the tab shaping and avoiding short circuits between the tabs and the battery shell. The first plastic part and / or the second plastic part are connected to the end plate by ultrasonic heat fusion, and there is no need to install a connecting piece in the battery shell, thus avoiding occupying the space of the battery shell and further improving the space utilization rate of the battery shell.

[0020] The utility model provides a battery, comprising a battery cell and the battery housing assembly as described above, which can improve the space utilization of the battery housing and avoid short circuits between the tabs and the battery housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0022] Figure 1This is an exploded view of a battery housing assembly of the present utility model;

[0023] Figure 2 This is an exploded view of a battery housing assembly of the present invention from another perspective;

[0024] Figure 3 This is a top view of a battery housing assembly of the present utility model;

[0025] Figure 4 yes Figure 3 Middle AA view;

[0026] Figure 5 This is a schematic diagram of a connection hole in a battery housing assembly of the present invention;

[0027] Figure 6 This is another schematic diagram of a connection hole in a battery housing assembly of the present invention;

[0028] Figure 7 This is another schematic diagram of a connection hole in a battery housing assembly of the present invention;

[0029] Figure 8 This is another schematic diagram of a connecting hole in a battery housing assembly of the present invention.

[0030] In the picture:

[0031] 1. Battery case; 11. End plate; 12. Mounting groove; 13. First tab through hole; 14. Connection hole; 2. Plastic part; 21. First plastic part; 211. Second tab through hole; 212. Flange edge; 22. Second plastic part; 221. Third tab through hole; 222. Tab shaping structure; 3. Plastic protrusion; 4. Explosion-proof valve; 5. Liquid injection hole. DETAILED DESCRIPTION

[0032] Before any embodiments of the present application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the foregoing drawings.

[0033] In this application, the terms "comprises," "includes," "has," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0034] In this application, the terms "connect," "combine," "couple," and "install" may refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without an intermediary, and an indirect connection refers to two parts or components being connected to at least one intermediary, with the two parts or components being connected via the intermediary. Furthermore, "connect" and "couple" are not limited to physical or mechanical connections or couplings and may include electrical connections or couplings.

[0035] In this application, it will be understood by those skilled in the art that the function performed by an assembly can be performed by one assembly, multiple assemblies, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one assembly, or a combination of multiple parts.

[0036] In the present application, the terms "upper", "lower", "left", "right", "front", "back" and other directional words are described based on the orientation and positional relationship shown in the accompanying drawings, and should not be understood as limiting the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to the other element "upper" or "lower", but also be indirectly connected to the other element "upper" or "lower" through an intermediate element. It should also be understood that directional words such as upper side, lower side, left side, right side, front side, back side, etc. not only represent the positive orientation, but can also be understood as the lateral orientation. For example, below can include directly below, lower left, lower right, lower front and lower back, etc.

[0037] In the process of designing and manufacturing batteries, in order to improve the space utilization of the battery shell and avoid short circuit between the tabs and the battery shell, Figures 1-8 As shown, the present invention provides a battery housing assembly. The battery housing assembly includes a battery housing 1 and a plastic part 2.

[0038] The battery housing 1 has an end plate 11. The end plate 11 is clamped onto a plastic part 2, which includes a first plastic part 21 and a second plastic part 22. The first plastic part 21 and / or the second plastic part 22 are connected to the end plate 11 by ultrasonic heat fusion. The second plastic part 22 is provided with at least one tab shaping structure 222 on the side facing away from the end plate 11. The tab shaping structure 222 can shape the battery tab when it is retracted to prevent the tab from electrically contacting the battery housing 1.

[0039] By providing the tab shaping structure 222 on the second plastic part 22, during the battery assembly process, the tab shaping structure 222 can shape the battery tabs as they are retracted to prevent the tabs from electrically contacting the battery housing 1, thereby ensuring the tab shaping effect and preventing short circuits between the tabs and the battery housing 1. The first plastic part 21 and / or the second plastic part 22 are connected to the end plate 11 by ultrasonic heat fusion, eliminating the need to install a connecting piece in the battery housing 1, avoiding space occupation in the battery housing 1, and further improving the space utilization of the battery housing 1.

[0040] In some embodiments, a connection hole 14 is formed on the end plate 11, and the first plastic part 21 and / or the second plastic part 22 have a plastic protrusion 3. The plastic protrusion 3 is located in the connection hole 14 and can be connected to the connection hole 14 by ultrasonic heat fusion. Specifically, the plastic protrusion 3 is melted by heat generated by ultrasonic high-frequency vibration, and then fixed to the end plate 11 of the battery housing 1 after cooling, ensuring a stable connection between the first plastic part 21 and / or the second plastic part 22 and the battery housing 1.

[0041] like Figure 5-Figure 8 As shown, in some embodiments, the connection hole 14 is a vertical blind hole, an inclined hole, or a stepped blind hole. This design of the connection hole 14 can enhance the strength of the connection between the first plastic part 21 and / or the second plastic part 22 and the battery case 1 after ultrasonic heat fusion. To further enhance the strength of the connection between the first plastic part 21 and the second plastic part 22 and the battery case 1, a connection groove can be provided on the end plate 11, located on the side wall of the connection hole 14.

[0042] In some embodiments, a first tab through-hole 13 is provided on the end plate 11, a second tab through-hole 211 is provided on the first plastic part 21, and a third tab through-hole 221 is provided on the second plastic part 22. The first tab through-hole 13, the second tab through-hole 211, and the third tab through-hole 221 are arranged relative to each other, and the tabs can sequentially pass through the third tab through-hole 221, the first tab through-hole 13, and the second tab through-hole 211 and extend out. Specifically, the first tab through-hole 13, the second tab through-hole 211, and the third tab through-hole 221 are provided based on the number of positive or negative electrodes designed on the end plate 11. The tabs pass through the second tab through-hole 211 and fold over the top of the end plate 11, which can reduce the internal occupancy of the battery housing 1 and improve the internal space utilization of the battery housing 1.

[0043] In some embodiments, an explosion-proof valve 4 is provided on the end plate 11. The explosion-proof valve 4 has a thinned area. Specifically, in this embodiment, the thinned area is a notch, and the notch can be directly scratched on the explosion-proof valve 4. The thinned area of ​​the explosion-proof valve 4 can face the end plate 11 or away from the end plate 11. Through the above arrangement, the strength of the explosion-proof valve 4 at the thinned area is lower. When a battery malfunction causes pressure to increase, the air pressure will act on the thinned area, causing the thinned area of ​​the explosion-proof valve 4 to rupture, thereby allowing the gas to be quickly discharged and preventing the battery from exploding.

[0044] In some embodiments, the housing is provided with a liquid injection hole 5. The liquid injection hole 5 facilitates the subsequent injection of electrolyte.

[0045] In some embodiments, a mounting groove 12 is defined on the side of the end plate 11 facing away from the second plastic part 22. The first plastic part 21 is positioned within the mounting groove 12, and the distance between the side of the first plastic part 21 facing away from the second plastic part 22 and the opening of the mounting groove 12 is -1H-0.5H, where H is the thickness of the end plate 11. The distance between the side of the first plastic part 21 facing away from the second plastic part 22 and the opening of the mounting groove 12 is -1H, which represents the height of the first plastic part 21 extending beyond the opening of the mounting groove 12, and 0.5H represents the distance between the first plastic part 21 and the opening of the mounting groove 12 when the first plastic part 21 is positioned within the mounting groove 12. Providing the mounting groove 12 facilitates positioning and installation of the first plastic part 21. Furthermore, since the first plastic part 21 is positioned within the mounting groove 12, the height of the first plastic part 21 relative to the end plate 11 can be reduced, thereby reducing the overall volume of the battery and improving its compactness. Furthermore, by limiting the height difference of the first plastic part 21 after installation in the installation groove 12 , the strength of the end plate 11 can be taken into consideration while effectively utilizing the space of the installation groove 12 .

[0046] In some embodiments, the first plastic part 21 has a flange 212 with a width of 0 mm to 10 mm. If the width L of the flange 212 of the first plastic part 21 is too wide, the weight of the first plastic part 21 increases, and the material used in the first plastic part 21 increases, thereby increasing costs. This also affects the design of the mounting groove 12 of the end plate 11. If the width L of the flange 212 of the first plastic part 21 is too narrow, the first plastic part 21 cannot be effectively fixed, and the mounting groove 12 cannot perform its positioning function. Therefore, the above-mentioned definition can facilitate the positioning of the first plastic part 21 while preventing the plastic part from being too bulky.

[0047] In some embodiments, the first plastic part 21 and the second plastic part 22 are integral or split. Designing the plastic part 2 as a split structure facilitates assembly with the end plate 11. Alternatively, the first plastic part 21 and the second plastic part 22 can be interconnected and integrated for ease of manufacture. This is not intended to be limiting.

[0048] This embodiment also provides a battery, which includes a battery cell and the above battery housing assembly. The battery cell is arranged in the battery housing assembly, which can improve the space utilization of the battery housing 1 and avoid short circuit between the tab and the battery housing 1.

[0049] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. A person skilled in the art will be able to make other variations or modifications based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A battery housing assembly, characterized in that: include: A battery housing (1), the battery housing (1) having an end plate (11); A plastic part (2), wherein the end plate (11) is clamped on the plastic part (2), and the plastic part (2) includes a first plastic part (21) and a second plastic part (22), wherein the first plastic part (21) and / or the second plastic part (22) are connected to the end plate (11) by ultrasonic heat fusion, and at least one tab shaping structure (222) is provided on a side of the second plastic part (22) facing away from the end plate (11), and the tab shaping structure (222) can shape the tab of the battery when it is retracted to prevent the tab from electrically contacting the battery housing (1).

2. The battery housing assembly according to claim 1, wherein: The end plate (11) is provided with a connection hole (14), the first plastic part (21) and / or the second plastic part (22) has a plastic protrusion (3), the plastic protrusion (3) is located in the connection hole (14), and the plastic protrusion (3) can be connected to the connection hole (14) by ultrasonic hot melting.

3. The battery housing assembly according to claim 2, wherein: The connecting hole (14) is a vertical blind hole, an inclined hole or a stepped blind hole.

4. The battery housing assembly according to claim 1, wherein: The end plate (11) is provided with a first pole lug through hole (13), the first plastic part (21) is provided with a second pole lug through hole (211), and the second plastic part (22) is provided with a third pole lug through hole (221). The first pole lug through hole (13), the second pole lug through hole (211) and the third pole lug through hole (221) are arranged relative to each other, and the pole lug can sequentially pass through the third pole lug through hole (221), the first pole lug through hole (13) and the second pole lug through hole (211) and extend out.

5. The battery housing assembly according to claim 1, wherein: An explosion-proof valve (4) is provided on the end plate (11).

6. The battery housing assembly according to claim 1, wherein: A liquid injection hole (5) is provided on the shell.

7. The battery housing assembly according to claim 1, wherein: A mounting groove (12) is provided on a side of the end plate (11) facing away from the second plastic part (22); the first plastic part (21) is located in the mounting groove (12); and a distance between the side of the first plastic part (21) facing away from the second plastic part (22) and the notch of the mounting groove (12) is -1H-0.5H, where H is the thickness of the end plate (11).

8. The battery housing assembly according to claim 1, wherein: The first plastic part (21) has a flange edge (212), and the width of the flange edge (212) is 0 mm-10 mm.

9. The battery housing assembly according to claim 1, wherein: The first plastic part (21) and the second plastic part (22) are an integrated structure or a split structure.

10. A battery, characterized in that The invention comprises a battery cell and a battery housing assembly according to any one of claims 1 to 9, wherein the battery cell is arranged in the battery housing assembly.

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