Battery shell assembly and battery

Abstract

The utility model relates to the technical field of batteries, and particularly discloses a battery shell assembly and a battery, the battery shell assembly comprises a shell body, a first plastic part and a second plastic part; the shell body is provided with a mounting shell wall, and the mounting shell wall is provided with a tab through hole communicating the inner side and the outer side of the shell body; the first plastic part covers the outer wall of the mounting shell wall; the first plastic part is convexly provided with a first annular insulating part; the second plastic part covers the inner wall of the mounting shell wall; the second plastic part is convexly provided with a second annular insulating part. According to the utility model, only the flat-plate-type second plastic part with smaller thickness is arranged in the shell body, and related devices connected with the tabs of the battery cell are all positioned outside the shell body, so that the occupied space in the shell body is smaller, and the first annular insulating part and the second annular insulating part can form multiple insulation; in this way, the insulation capacity of the tab through hole is improved, the thickness of the second plastic part cannot be increased through the multiple insulation modes, and utilization of the internal space of the shell body is facilitated.

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] A battery is a device that converts chemical energy into electrical energy. It serves as a primary energy storage component and has a positive and negative electrode. Using a battery as an energy source produces a stable voltage or current, is less susceptible to environmental influences, and provides a stable power supply for extended periods. Batteries are also portable and easy to install or replace on electrical devices.

[0003] Currently, batteries are typically protected internally by a casing and a cover. Upper and lower plastic layers are placed on either side of the cover to insulate the battery's positive and negative electrodes. However, in existing technology, the battery's poles, tabs, and connectors are all located inside the casing, making the lower plastic, poles, tabs, and connectors bulky and unsuitable for utilizing the internal space of the casing. Utility Model Content

[0004] The purpose of the utility model is to provide a battery housing assembly and a battery, so as to solve the problem in the prior art that the battery poles, pole tabs and connecting pieces are all arranged inside the housing, and the lower plastic, poles, pole tabs and connecting pieces are bloated as a whole, which is not conducive to the utilization of the internal space of the housing.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] In one aspect, the present invention provides a battery housing assembly for mounting a battery cell, the battery housing assembly comprising:

[0007] The shell body has a mounting shell wall, and the mounting shell wall is provided with a tab through hole communicating with the inner and outer sides of the shell body; the battery cell is arranged in the shell body;

[0008] A first plastic part, the first plastic part covering the outer wall of the mounting shell wall; the first plastic part protrudingly has a first annular insulating portion, the first annular insulating portion being capable of being passed through the tab through-hole;

[0009] A second plastic part, the second plastic part covers the inner wall of the mounting shell wall; the second plastic part is protruding with a second annular insulating portion, the second annular insulating portion can be passed through the tab through-hole, and the first annular insulating portion and the second annular insulating portion are nested with each other; the second plastic part is a flat plate structure, and the tab of the battery cell can pass through the first plastic part, the second plastic part and the tab through-hole to the outside world.

[0010] As an optional solution of the above-mentioned battery housing assembly, the first annular insulating portion abuts against the hole wall of the tab through-hole, and the second annular insulating portion is nested in the first annular insulating portion; or

[0011] The second annular insulating portion abuts against the hole wall of the tab through hole, and the first annular insulating portion is nested in the second annular insulating portion.

[0012] As an optional solution of the above-mentioned battery housing assembly, at least two first annular insulating parts are provided, and at least one second annular insulating part is provided, one of the two first annular insulating parts abuts against the hole wall of the tab through-hole, and the second annular insulating part is nested between the two first annular insulating parts; or

[0013] There is at least one first annular insulating portion, and at least two second annular insulating portions are provided. One of the two second annular insulating portions abuts against the hole wall of the tab through hole, and the first annular insulating portion is nested between the two second annular insulating portions.

[0014] As an optional solution of the above-mentioned battery housing assembly, the first plastic part is a split structure or an integrated structure; the second plastic part is a split structure or an integrated structure.

[0015] As an optional solution to the above-mentioned battery housing assembly, the tab through-hole includes a positive electrode through-hole, and at least one positive electrode through-hole is provided; or

[0016] The tab through-hole includes a negative electrode through-hole, and at least one negative electrode through-hole is provided; or

[0017] The tab through holes include the positive electrode through hole and the negative electrode through hole, and at least one of the positive electrode through hole and the negative electrode through hole is provided.

[0018] As an optional solution for the above-mentioned battery shell assembly, the battery shell assembly also includes an explosion-proof valve, the mounting shell wall is provided with an explosion-proof hole connecting the inner and outer sides of the shell body, and the explosion-proof valve is arranged on the outer wall of the mounting shell wall and covers the explosion-proof hole.

[0019] As an optional solution of the above-mentioned battery housing assembly, a notch is provided on a side of the explosion-proof valve facing the mounting shell wall, or a notch is provided on a side of the explosion-proof valve facing away from the mounting shell wall.

[0020] As an optional solution of the above-mentioned battery housing assembly, the first plastic part has a flange edge, and the width of the flange edge ranges from 0 to 10 mm.

[0021] As an optional solution for the above-mentioned battery shell assembly, the wall thickness of the mounting shell wall is H. When the flange edge of the first plastic part is protruding outside the mounting shell wall, the distance between the upper surface of the flange edge and the upper surface of the mounting shell wall is in the range of 0 to H; when the flange edge of the first plastic part is recessed into the mounting shell wall, the distance between the upper surface of the flange edge and the upper surface of the mounting shell wall is in the range of 0 to 0.5H.

[0022] On the other hand, the present invention provides a battery, comprising the battery housing assembly as described above, wherein the battery further comprises the battery core, and the battery core is disposed in the housing body.

[0023] The beneficial effects of the utility model are:

[0024] The battery shell assembly includes a shell body, a first plastic part, and a second plastic part. The shell body has a mounting shell wall, and the mounting shell wall is provided with a tab through-hole connecting the inside and outside of the shell body. The battery cell is arranged in the shell body, and the first plastic part covers the outer wall of the mounting shell wall, and the second plastic part covers the inner wall of the mounting shell wall, so that the first plastic part and the second plastic part can insulate and protect both sides of the mounting shell wall and the tab through-hole. Among them, the second plastic part is a flat plate structure, and the tab of the battery cell can pass through the first plastic part, the second plastic part, and the tab through-hole to the outside world, so that the inside of the shell body only has a flat plate-shaped second plastic part with a smaller thickness, and the related devices connected to the tab of the battery cell are all located outside the shell body, so that they occupy less space inside the shell body, which can improve the space utilization rate inside the shell body. The first plastic part is protrudingly provided with a first annular insulating portion, which can be passed through the through hole of the pole ear. The second plastic part is protrudingly provided with a second annular insulating portion, which can be passed through the through hole of the pole ear. The first annular insulating portion and the second annular insulating portion are nested with each other, so that the first annular insulating portion and the second annular insulating portion can form multiple insulations, thereby improving the insulation capacity at the through hole of the pole ear, and the multiple insulation methods will not increase the thickness of the second plastic part, which is beneficial to the utilization of the internal space of the shell body. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic structural diagram of a battery housing assembly provided by an embodiment of the present utility model;

[0026] Figure 2 A partial exploded view of a battery housing assembly provided by an embodiment of the present utility model;

[0027] Figure 3 A partial cross-sectional view of a battery housing assembly provided by an embodiment of the present invention Figure 1 ;

[0028] Figure 4 A partial cross-sectional view of a battery housing assembly provided by an embodiment of the present invention Figure 2 ;

[0029] Figure 5 A partial cross-sectional view of a battery housing assembly provided by an embodiment of the present invention Figure 3 ;

[0030] Figure 6 A partial cross-sectional view of a battery housing assembly provided by an embodiment of the present invention Figure 4 ;

[0031] Figure 7 This is a schematic structural diagram of the first plastic part and the second plastic part provided in an embodiment of the present utility model from another perspective.

[0032] In the picture:

[0033] 1. Shell body; 11. Mounting shell wall; 111. Tab through hole; 112. Explosion-proof hole; 113. Liquid injection port; 114. Mounting groove; 2. First plastic part; 21. First annular insulating portion; 22. Flange edge; 3. Second plastic part; 31. Second annular insulating portion; 4. Explosion-proof valve. DETAILED DESCRIPTION

[0034] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a specific position, be constructed and operated in a specific position, and therefore should not be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. The first feature being "below", "below" and "below" the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0036] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0037] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0038] like Figures 1 to 7 As shown, this embodiment provides a battery housing assembly for installing battery cells.

[0039] The battery housing assembly includes a housing body 1, a first plastic part 2, and a second plastic part 3. The housing body 1 has a mounting wall 11, which is provided with a tab through-hole 111 connecting the inside and outside of the housing body 1. The battery cell is disposed within the housing body 1. The first plastic part 2 covers the outer wall of the mounting wall 11, and the second plastic part 3 covers the inner wall of the mounting wall 11. Thus, the first plastic part 2 and the second plastic part 3 can insulate and protect both sides of the mounting wall 11 and the tab through-hole 111. Optionally, a mounting groove 114 is provided on the outer wall of the mounting wall 11. The tab through-hole 111 is connected to the mounting groove 114, and the first plastic part 2 is embedded in the mounting groove 114, thereby rationally utilizing the space.

[0040] Among them, the second plastic part 3 is a flat plate structure, and the tab of the battery cell can pass through the first plastic part 2, the second plastic part 3 and the tab through-hole 111 to the outside world, so that the interior of the shell body 1 only has a flat plate-shaped second plastic part 3 with a smaller thickness, and the related components connected to the tab of the battery cell are all located outside the shell body 1, so they occupy a smaller space inside the shell body 1, which can improve the space utilization rate inside the shell body 1. The first plastic part 2 is provided with a first annular insulating portion 21, which can be inserted into the tab through-hole 111. The second plastic part 3 is provided with a second annular insulating portion 31, which can be inserted into the tab through-hole 111. The first annular insulating portion 21 and the second annular insulating portion 31 are nested with each other, so that the first annular insulating portion 21 and the second annular insulating portion 31 can form multiple insulation, thereby improving the insulation capacity at the tab through-hole 111. Moreover, these multiple insulation methods will not increase the thickness of the second plastic part 3, which is beneficial to the utilization of the internal space of the shell body 1.

[0041] like Figure 3 and Figure 4 As shown, the first annular insulating portion 21 abuts against the hole wall of the pole ear through hole 111, and the second annular insulating portion 31 is nested in the first annular insulating portion 21; or the second annular insulating portion 31 abuts against the hole wall of the pole ear through hole 111, and the first annular insulating portion 21 is nested in the second annular insulating portion 31, so that the first annular insulating portion 21 and the second annular insulating portion 31 can form double insulation, thereby improving the insulation capacity at the pole ear through hole 111, and the first annular insulating portion 21 or the second annular insulating portion 31 is arranged to fit and abut against the hole wall of the pole ear through hole 111, so as to position the first plastic part 2 and the second plastic part 3, facilitate installation, and improve the stability of the first plastic part 2 and the second plastic part 3 on the installation shell wall 11 to prevent lateral displacement.

[0042] like Figure 5 and Figure 6 As shown, at least two first annular insulating parts 21 are provided, and at least one second annular insulating part 31 is provided, one of the two first annular insulating parts 21 is abutted against the hole wall of the pole ear through hole 111, and the second annular insulating part 31 is nested between the two first annular insulating parts 21; or at least one first annular insulating part 21 is provided, and at least two second annular insulating parts 31 are provided, one of the two second annular insulating parts 31 is abutted against the hole wall of the pole ear through hole 111, and the first annular insulating part 21 is nested between the two second annular insulating parts 31, so that the first annular insulating part 21 and the second annular insulating part 31 can form at least triple insulation, thereby further improving the insulation capacity at the pole ear through hole 111.

[0043] Furthermore, the first plastic part 2 is a split structure or an integrated structure, and the second plastic part 3 is a split structure or an integrated structure. When the first plastic part 2 is a split structure and the second plastic part 3 is also a split structure, the split structure can easily disassemble and reassemble the first plastic part 2 and the second plastic part 3, so as to adjust the position according to actual needs and make rational use of space; when the first plastic part 2 is an integrated structure and the second plastic part 3 is also an integrated structure, the integrated structure makes the first plastic part 2 and the second plastic part 3 more integrated and coordinated in design, and fully insulates and protects the installation shell wall 11.

[0044] like Figure 1 and Figure 2As shown, the tab through-hole 111 includes a positive through-hole, and at least one positive through-hole is provided, so that the mounting shell wall 11 only passes through the tab of the positive electrode of the battery cell as required; or the tab through-hole 111 includes a negative through-hole, and at least one negative through-hole is provided, so that the mounting shell wall 11 only passes through the tab of the negative electrode of the battery cell as required; or the tab through-hole 111 includes a positive through-hole and a negative through-hole, and at least one positive through-hole and a negative through-hole are provided, so that the mounting shell wall 11 can pass through the tabs of the positive and negative electrodes of the battery cell as required, thereby meeting actual layout requirements.

[0045] Furthermore, a liquid injection port 113 is provided on the mounting shell wall 11. The liquid injection port 113 communicates with the inside and outside of the shell body 1 through the second plastic part 3. The provision of the liquid injection port 113 facilitates the injection of electrolyte into the battery cell. Optionally, the liquid injection port 113 can be provided on a side close to the positive electrode through-hole, or on a side close to the negative electrode through-hole, or between the positive and negative electrode through-holes.

[0046] Furthermore, the hot-melt battery casing assembly also includes an explosion-proof valve 4. The mounting casing wall 11 is provided with an explosion-proof hole 112 that connects the inside and outside of the casing body 1. The explosion-proof valve 4 is provided on the outer wall of the mounting casing wall 11 and covers the explosion-proof hole 112. When the internal pressure of the casing body 1 abnormally increases, the explosion-proof valve 4 can automatically open to release the internal pressure, thereby preventing an explosion caused by the abnormal increase in the internal pressure of the casing body 1. Optionally, the explosion-proof valve 4 is provided with a notch on the side facing the mounting casing wall 11, or the explosion-proof valve 4 is provided with a notch on the side facing away from the mounting casing wall 11. The notch allows the explosion-proof valve 4 to evenly withstand pressure and rupture along the notch, thereby improving the safety of the battery.

[0047] like Figures 2 to 6 As shown, the first plastic part 2 has a flange edge 22, and the width of the flange edge 22 ranges from 0 to 10 mm. By providing the flange edge 22, the installation of the first plastic part 2 on the mounting shell wall 11 can be facilitated, the structural strength of the first plastic part 2 can be improved, and the stability and reliability of the first plastic part 2 can be ensured. Moreover, the width range of the flange edge 22 is set to 0 to 10 mm, which can control the overall size of the first plastic part 2, control the weight of the first plastic part 2, reduce materials and costs, and avoid affecting the design of the shell body 1. Among them, the wall thickness of the mounting shell wall 11 is H. When the flange edge 22 of the first plastic part 2 is protruding outside the mounting shell wall 11, the distance between the upper surface of the flange edge 22 and the upper surface of the mounting shell wall 11 is in the range of 0 to H, thereby controlling the height of the first plastic part 2 and preventing the first plastic part 2 from being too high and being detrimental to the improvement of the battery volume utilization rate; when the flange edge 22 of the first plastic part 2 is recessed in the mounting shell wall 11, the distance between the upper surface of the flange edge 22 and the upper surface of the mounting shell wall 11 is in the range of 0 to 0.5H, thereby controlling the height of the first plastic part 2 and preventing the wall thickness of the mounting shell where the first plastic part 2 is mounted from being too thin and affecting the strength of the shell body 1.

[0048] This embodiment also provides a battery, including a battery shell assembly as described above, and the battery also includes a battery cell, which is arranged in the shell body 1. By using the battery shell assembly as described above, the battery has only a flat-plate-type second plastic part 3 with a smaller thickness inside the shell body 1, and the related devices connected to the tabs of the battery cell are all located outside the shell body 1, so they occupy a smaller internal space of the shell body 1, which can improve the space utilization rate inside the shell body 1, and the first annular insulating part 21 and the second annular insulating part 31 are nested with each other, so that the first annular insulating part 21 and the second annular insulating part 31 can form multiple insulations, thereby improving the insulation capacity at the tab through hole 111. These multiple insulation methods will not increase the thickness of the second plastic part 3, which is beneficial to the utilization of the internal space of the shell body 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. Those skilled in the art will appreciate that other variations or modifications can be made 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 for mounting a battery cell, characterized in that: The battery housing assembly comprises: A shell body (1), the shell body (1) having a mounting shell wall (11), the mounting shell wall (11) being provided with a tab through-hole (111) communicating with both inside and outside sides of the shell body (1); the battery core being arranged in the shell body (1); A first plastic part (2), the first plastic part (2) covering the outer wall of the mounting shell wall (11); the first plastic part (2) is provided with a first annular insulating portion (21) protruding therefrom, and the first annular insulating portion (21) can be passed through the tab through hole (111); A second plastic part (3), the second plastic part (3) covers the inner wall of the mounting shell wall (11); the second plastic part (3) is provided with a second annular insulating portion (31), the second annular insulating portion (31) can be inserted into the tab through-hole (111), and the first annular insulating portion (21) and the second annular insulating portion (31) are nested with each other; the second plastic part (3) is a flat plate structure, and the tab of the battery cell can pass through the first plastic part (2), the second plastic part (3) and the tab through-hole (111) to the outside.

2. The battery housing assembly according to claim 1, wherein: The first annular insulating portion (21) abuts against the hole wall of the tab through hole (111), and the second annular insulating portion (31) is nested in the first annular insulating portion (21); or The second annular insulating portion (31) abuts against the hole wall of the tab through hole (111), and the first annular insulating portion (21) is nested in the second annular insulating portion (31).

3. The battery housing assembly according to claim 1, wherein: At least two first annular insulating parts (21) are provided, and at least one second annular insulating part (31) is provided, one of the two first annular insulating parts (21) abuts against the hole wall of the tab through hole (111), and the second annular insulating part (31) is nested between the two first annular insulating parts (21); or At least one first annular insulating portion (21) is provided, and at least two second annular insulating portions (31) are provided, one of the two second annular insulating portions (31) abuts against the hole wall of the tab through hole (111), and the first annular insulating portion (21) is nested between the two second annular insulating portions (31).

4. The battery housing assembly according to claim 1, wherein: The first plastic part (2) is a split structure or an integrated structure; the second plastic part (3) is a split structure or an integrated structure.

5. The battery housing assembly according to claim 1, wherein: The tab through hole (111) includes a positive electrode through hole, and at least one positive electrode through hole is provided; or The tab through hole (111) includes a negative electrode through hole, and at least one negative electrode through hole is provided; or The tab through hole (111) includes the positive electrode through hole and the negative electrode through hole, and at least one of the positive electrode through hole and the negative electrode through hole is provided.

6. The battery housing assembly according to claim 1, wherein: The battery housing assembly further comprises an explosion-proof valve (4); the mounting housing wall (11) is provided with an explosion-proof hole (112) communicating with the inner and outer sides of the housing body (1); the explosion-proof valve (4) is arranged on the outer wall of the mounting housing wall (11) and covers the explosion-proof hole (112).

7. The battery housing assembly according to claim 6, wherein: The explosion-proof valve (4) is provided with a notch on a side facing the installation shell wall (11), or the explosion-proof valve (4) is provided with a notch on a side facing away from the installation shell wall (11).

8. The battery housing assembly according to claim 1, wherein: The first plastic part (2) has a flange edge (22), and the width of the flange edge (22) ranges from 0 to 10 mm.

9. The battery housing assembly according to claim 8, wherein: The wall thickness of the mounting shell wall (11) is H. When the flange edge (22) of the first plastic part (2) is protruding outside the mounting shell wall (11), the distance between the upper surface of the flange edge (22) and the upper surface of the mounting shell wall (11) ranges from 0 to H; when the flange edge (22) of the first plastic part (2) is recessed inside the mounting shell wall (11), the distance between the upper surface of the flange edge (22) and the upper surface of the mounting shell wall (11) ranges from 0 to 0.5H.

10. A battery, characterized in that: The battery comprises a battery casing assembly according to any one of claims 1 to 9, wherein the battery further comprises the battery core, and the battery core is arranged in the casing body (1).

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