Battery cover plate, cover plate assembly and battery

Abstract

The utility model belongs to the technical field of battery structures, and discloses a battery cover plate, a cover plate assembly and a battery. The battery cover plate is provided with a pole hole, the pole hole penetrates through the battery cover plate, and the size of the pole hole in the length direction of the battery cover plate is not smaller than the size of the pole hole in the width direction of the battery cover plate. A first limiting part and a second limiting part are arranged at the two ends of the pole column hole respectively, the first limiting part and the second limiting part can limit and clamp the battery pole column, open areas are formed in the first limiting part and the second limiting part, and the battery pole column can be exposed out of or protrude out of the containing space through the open areas. By arranging the first limiting part and the second limiting part and forming the accommodating space, the battery pole can be conveniently limited and accommodated, and the size of the battery pole can be conveniently increased in the length direction of the battery cover plate, so that the overcurrent area is increased, the overcurrent capacity of the battery pole can be improved while the overall structure of the battery is kept light and thin, and the service life of the battery is prolonged. And the fast charging capability of the battery is enhanced.

Description

Technical Field

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

[0002] With the rapid development of high-voltage fast-charging technology, power batteries are rapidly evolving towards being thinner, lighter and more efficient. This trend requires the battery to not only be reduced in volume, especially with a significant reduction in thickness, but also ensure that the pole column on the battery top cover plate has excellent over-current capacity and maintains a low internal resistance to meet the requirements of fast charging.

[0003] Within the framework of existing technologies, the flanging and riveting top cover plate stands out among many battery manufacturing technologies and is widely adopted because its pole column can be integrally formed, thus ensuring a low internal resistance. However, restricted by current manufacturing process limitations, the pole column structure of this top cover plate is fixed in a circular design. As the thickness of the power battery continues to decrease, the width of the battery cover plate also decreases accordingly, which directly leads to extremely limited space in the width direction of the cover plate. In this context, the diameter of the circular pole column has to be reduced accordingly, and this change inevitably weakens the over-current capacity of the pole column, making it difficult to meet the growing requirements of fast-charging technology.

[0004] Based on the above, there is an urgent need for a battery cover plate, a cover plate assembly and a battery to solve the above technical problems. Summary of the Utility Model

[0005] An object of the utility model is to provide a battery cover plate and a cover plate assembly that can adapt to a smaller space and have stronger over-current capacity.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A battery cover plate is provided with a pole column hole that penetrates the battery cover plate along the thickness direction of the battery cover plate, and the dimension of the pole column hole along the length direction of the battery cover plate is not less than the dimension of the pole column hole along the width direction of the battery cover plate;

[0008] Along the thickness direction of the battery cover plate, a first limiting portion and a second limiting portion are respectively arranged at both ends of the pole column hole. A receiving space is limited and formed between the first limiting portion, the second limiting portion and the side wall of the pole column hole for limiting and receiving a battery pole column. The first limiting portion and the second limiting portion can limit and clamp the battery pole column along the thickness direction of the battery cover plate, and both the first limiting portion and the second limiting portion are formed with open areas through which the battery pole column can be exposed or protrude from the receiving space.

[0009] Preferably, one end of the pole hole is provided with a first flange portion, and the first flange portion protrudes from the battery cover plate in the thickness direction of the battery cover plate;

[0010] At least a part of the first flange portion is configured to be bendable in a direction toward the axis of the pole hole to form the first limiting portion.

[0011] Preferably, a protruding structure is provided on the first flange portion, and the protruding structure is arranged at an end of the first flange portion away from the battery cover plate in the thickness direction of the battery cover plate;

[0012] The protruding structure is configured to be bendable in a direction toward the axis of the pole hole to form the first limiting portion.

[0013] Preferably, the cross-sectional shape of the battery pole is rectangular, elliptical, trapezoidal or parallelogram, and the first limiting portions are arranged on both opposite sides of the battery pole, and the first limiting portions are arranged at intervals to form the open area.

[0014] Preferably, along the thickness direction of the battery cover plate, one end of the battery pole abuts against at least four of the first limiting portions, and at least four of the first limiting portions are arranged around the circumference of the battery pole.

[0015] Preferably, a second flange portion is provided at the other end of the pole hole, and the second flange portion protrudes from the battery cover plate in the thickness direction of the battery cover plate;

[0016] At least a part of the second flange portion is configured to be bendable in a direction toward the axis of the pole hole to form the second limiting portion.

[0017] Preferably, a second flange portion is provided at the other end of the pole hole, and the second flange portion extends from the side wall of the pole hole toward the axis of the pole hole to form the second limiting portion.

[0018] A cover plate assembly includes a battery pole and the above-mentioned battery cover plate, and the battery pole is limited and fixed between the first limiting portion, the second limiting portion and the side wall of the pole hole of the battery cover plate.

[0019] Preferably, the cover plate assembly further includes an insulating member and a sealing ring. The insulating member is in insulating abutment between the first limiting portion and the battery pole, and is in insulating abutment between the side wall of the pole hole and the battery pole. The sealing ring is in sealing and insulating abutment between the second limiting portion and the battery pole.

[0020] The beneficial effects of the battery cover plate and the cover plate assembly provided by the present utility model are as follows: By providing the first limiting portion, the second limiting portion, and forming a receiving space with the inner wall of the pole hole, the battery pole can be conveniently limited and accommodated, and the size of the pole hole in the length direction of the battery cover plate is not less than the size of the pole hole in the width direction of the battery cover plate. Furthermore, it is convenient to increase the size of the battery pole in the length direction of the battery cover plate, thereby increasing the over-current area. Therefore, while maintaining the thin and light overall structure of the battery, the over-current capacity of the battery pole can be increased, and the fast charging ability of the battery can be enhanced.

[0021] Another object of the present utility model is to provide a battery that has both a smaller size and a better fast charging speed.

[0022] To achieve this purpose, the present utility model adopts the following technical solutions:

[0023] The battery includes the above-mentioned cover plate assembly.

[0024] The beneficial effects of the battery provided by the present utility model are as follows: Through this cover plate assembly, while maintaining the thin and light overall structure of the battery, the over-current capacity of the battery pole can be increased, and the fast charging ability of the battery can be enhanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a three-dimensional view of the battery cover plate after flanging and riveting provided by the present utility model;

[0026] Figure 2 is Figure 1 a partial enlarged view of A in

[0027] Figure 3 is a three-dimensional view of the battery cover plate before flanging and riveting provided by the present utility model;

[0028] Figure 4 is Figure 2 a partial enlarged view of B in

[0029] Figure 5 is a top view of the cover plate assembly provided by the present utility model;

[0030] Figure 6 is along Figure 5 a cross-sectional view in the C-C direction of

[0031] Figure 7 is Figure 6 a partial enlarged view of D in

[0032] In the figure:

[0033] 1. Battery cover plate; 11. Pole hole; 12. First flange portion; 121. Protruding structure; 13. Second flange portion;

[0034] 2. Battery terminal;

[0035] 3. Insulating part;

[0036] 4. Sealing ring;

[0037] 5. Lower plastic part;

[0038] 6. Explosion-proof valve. Detailed implementation manners

[0039] The present utility model will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that for the convenience of description, only the parts related to the present utility model are shown in the drawings rather than all the structures.

[0040] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0041] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "above", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below", and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or simply means that the horizontal height of the first feature is lower than that of the second feature.

[0042] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", and "left" are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meanings.

[0043] Next, according to the attached Figure 1 to the attached Figure 7Introduce the battery cover plate 1, cover plate assembly and battery provided by the present utility model.

[0044] Specifically, as Figure 1 shown, in this embodiment, the battery cover plate 1 is rectangular, which is convenient for manufacturing the whole battery into a thinner and lighter form. The battery cover plate 1 is provided with a pole hole 11, and the pole hole 11 penetrates the battery cover plate 1 along the thickness direction of the battery cover plate 1, and can penetrate the battery pole 2, so as to realize electrical connection on both sides of the battery cover plate 1 through the battery pole 2, facilitating the input and output of electric energy. The size of the pole hole 11 along the length direction of the battery cover plate 1 is not less than the size of the pole hole 11 along the width direction of the battery cover plate 1, so that the size of the battery cover plate 1 in the width direction will not limit the over-current area of the battery pole 2. During design, by reasonably setting the size of the pole hole 11 along the length direction of the battery cover plate 1, the over-current area can be increased, and thus the over-current capacity can be increased.

[0045] More specifically, as Figure 1 、 Figure 2 shown, along the thickness direction of the battery cover plate 1, a first limiting part and a second limiting part are respectively arranged at both ends of the pole hole 11, and a containing space is limited between the first limiting part, the second limiting part and the side wall of the pole hole 11. The containing space is used for limiting and accommodating the battery pole 2, and when the battery pole 2 is located in the containing space, the first limiting part and the second limiting part can limit and clamp the battery pole 2 along the thickness direction of the battery cover plate 1, so as to prevent the battery pole 2 from detaching from the battery cover plate 1 along the thickness direction of the battery cover plate 1. Moreover, both the first limiting part and the second limiting part are formed with open areas, and the battery pole 2 can be exposed or protrude from the containing space through the open areas, so as to facilitate connecting the battery pole 2 with pins or other electrical connection structures by welding or other means.

[0046] By arranging the first limiting part, the second limiting part and forming a containing space with the inner wall of the pole hole 11, the battery pole 2 can be conveniently limited and accommodated, and the size of the pole hole 11 along the length direction of the battery cover plate 1 can be made not less than the size of the pole hole 11 along the width direction of the battery cover plate 1. Furthermore, it is convenient to increase the size of the battery pole 2 along the length direction of the battery cover plate 1, so as to increase the over-current area, and thus the over-current capacity of the battery pole 2 can be increased while maintaining the thin and light overall structure of the battery, enhancing the fast charging ability of the battery.

[0047] As Figure 3 、 Figure 4As shown, in this embodiment, a first flange portion 12 is provided at one end of the terminal post hole 11, and the first flange portion 12 protrudes from the battery cover plate 1 in the thickness direction of the battery cover plate 1. At least a part of the first flange portion 12 can be bent in the direction towards the axis of the terminal post hole 11 to form the above-mentioned first limiting portion, so as to limit and abut against the battery terminal post 2 in the thickness direction of the battery cover plate 1.

[0048] Preferably, the first flange portion 12 is flush with the side wall of the terminal post hole 11 to prevent the first flange portion 12 from interfering with the process of the battery terminal post 2 entering the terminal post hole 11. After the battery terminal post 2 enters the terminal post hole 11, by bending the first flange portion 12 or at least a part of the first flange portion 12, the first limiting portion can be formed, so as to cooperate with the second limiting portion and the side wall of the terminal post hole 11 to form a receiving space for limiting and accommodating the battery terminal post 2.

[0049] Specifically, this bending can be achieved by a clinching process. As Figures 2 to 4 shown, a protruding structure 121 is provided on the first flange portion 12, and the protruding structure 121 is arranged on the end of the first flange portion 12 away from the battery cover plate 1 in the thickness direction of the battery cover plate 1. The protruding structure 121 can be bent by a clinching process so that it is bent in the direction towards the axis of the terminal post hole 11 to form the first limiting portion.

[0050] More specifically, in this embodiment, the cross-sectional shapes of the battery terminal posts 2 are all rectangular, so as to facilitate increasing the size of the battery terminal posts 2 in the length direction of the battery cover plate 1 and increasing the over-current capacity of the battery terminal posts 2. Of course, in some other embodiments, shapes such as oval, trapezoid or parallelogram can also be used, and the present utility model does not make specific limitations thereto.

[0051] As Figure 2 、 Figure 5 shown, in this embodiment, along the thickness direction of the battery cover plate 1, one end of the battery terminal post 2 abuts against four first limiting portions. The four first limiting portions are arranged around the circumference of the battery terminal post 2, and the first limiting portions are abutted and limited in the circumferential directions around the battery terminal post 2, improving the limiting stability of the battery terminal post 2. The four first limiting portions are arranged at intervals to form the above-mentioned open area.

[0052] Of course, in some embodiments, fewer or more first limiting portions can also be provided, as long as the limiting of the battery terminal post 2 can be achieved and it is ensured that the above-mentioned open area is formed. Exemplarily, in some embodiments, first limiting portions are provided on both opposite sides of the battery terminal post 2, and the first limiting portions are arranged at intervals to form an open area.

[0053] It should be noted that by providing the protruding structure 121, the clinching fixation of the battery terminal post 2 can be simplified. As Figure 4As shown, in this embodiment, the first flange portion 12 is continuously arranged circumferentially around the pole hole 11. If the first flange portion 12 is bent integrally, it will cause material accumulation at the part of the first flange portion 12 located at the corner of the pole hole 11 after bending, which will not only increase the difficulty of the riveting process, but also easily damage the battery cover 1 and the battery pole 2. Of course, in some other embodiments, at least one first flange portion 12 may also be arranged discontinuously circumferentially around the pole hole 11 to prevent material accumulation, which also falls within the scope of protection of the present utility model. It can be understood that compared with the continuous circumferential arrangement of the first flange portion 12 around the pole hole 11, the discontinuous arrangement can avoid material accumulation, but will limit the size of the accommodating space in the thickness direction of the battery cover 1.

[0054] As Figure 4 shown, in this embodiment, a second flange portion 13 is arranged at the other end of the pole hole 11. The second flange portion 13 extends from the side wall of the pole hole 11 in the axial direction of the pole hole 11 to form a second limiting portion. The second limiting portion is continuously arranged circumferentially along the side wall of the pole hole 11, and a through hole is arranged in the second limiting portion to form the above-mentioned open area.

[0055] Of course, in some other embodiments, the second flange portion 13 can also be arranged in the shape of the first flange portion 12 as Figure 2 shown to further facilitate increasing the size of the accommodating space in the thickness direction of the battery. Exemplarily, the second flange portion 13 protrudes from the battery cover 1 in the thickness direction of the battery cover 1, and at least part of the second flange portion 13 can be bent in the direction towards the axis of the pole hole 11 to form a second limiting portion.

[0056] The present utility model also provides a cover assembly, including the battery pole 2 and the above-mentioned battery cover 1. The battery pole 2 is limited and fixed in the accommodating space formed by the first limiting portion, the second limiting portion and the side wall of the pole hole 11. By arranging the first limiting portion and the second limiting portion and forming an accommodating space with the inner wall of the pole hole 11, the battery pole 2 can be conveniently limited and accommodated, and the size of the pole hole 11 in the length direction of the battery cover 1 can be made not less than the size of the pole hole 11 in the width direction of the battery cover 1. Furthermore, it is convenient to increase the size of the battery pole 2 in the length direction of the battery cover 1, thereby increasing the over-current area. Therefore, while maintaining the thin and light overall structure of the battery, the over-current capacity of the battery pole 2 can be increased, and the fast charging capacity of the battery can be enhanced.

[0057] More specifically, as Figures 5 to 7As shown, in this embodiment, the cover assembly further includes an insulating member 3, a sealing ring 4, an explosion-proof valve 6, and a lower plastic part 5. Among them, the insulating member 3 is insulated and abutted between the first limiting portion and the battery terminal 2, and is also insulated and abutted between the side wall of the terminal hole 11 and the battery terminal 2 to prevent conduction between the battery terminal 2 and the battery cover 1, causing short circuits and other phenomena. The sealing ring 4 is hermetically and insulatedly abutted between the second limiting portion and the battery terminal 2, which can not only ensure that the gas and electrolyte are sealed on one side of the battery cover 1, but also prevent conduction between the battery terminal 2 and the battery cover 1, causing short circuits and other phenomena. The lower plastic part 5 is attached to the bottom surface of the battery cover 1, and the explosion-proof valve 6 is fixedly arranged on the battery cover 1. The lower plastic part 5 and the explosion-proof valve 6 are both common parts in the battery field, and will not be introduced in detail here.

[0058] In this embodiment, both the positive terminal and the negative terminal can be limited and fixed by using the above-mentioned battery cover 1. Refer to Figure 7 As shown, the negative terminal adopts a copper-aluminum composite terminal. One end thereof abuts against the first limiting member through the insulating member 3, and the other end abuts against the second limiting member through the sealing ring 4, so as to be fixedly arranged in the accommodating space.

[0059] The present utility model also provides a battery, which includes the above-mentioned cover assembly. Through this cover assembly, while maintaining the overall structure of the battery to be thin and light, the over-current capacity of the battery terminal 2 can be increased, and the fast charging capacity of the battery can be enhanced.

[0060] Obviously, the above-mentioned embodiments of the present utility model are only examples for clearly explaining the present utility model, rather than limitations on the implementation manners of the present utility model. For those of ordinary skill in the art, various obvious changes, re-adjustments, and substitutions can be made without departing from the protection scope of the present utility model. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions, and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the claims of the present utility model.

Claims

1. Battery cover plate, characterized in that, The battery cover plate (1) is provided with a pole hole (11), the pole hole (11) penetrates through the battery cover plate (1) along the thickness direction of the battery cover plate (1), and the dimension of the pole hole (11) along the length direction of the battery cover plate (1) is not less than the dimension of the pole hole (11) along the width direction of the battery cover plate (1); Along the thickness direction of the battery cover plate (1), a first limiting portion and a second limiting portion are respectively arranged at two ends of the pole hole (11). A containing space is formed by limiting between the first limiting portion, the second limiting portion and the side wall of the pole hole (11). The containing space is used for limiting and accommodating a battery pole (2). The first limiting portion and the second limiting portion can limit and clamp the battery pole (2) along the thickness direction of the battery cover plate (1), and both the first limiting portion and the second limiting portion are formed with open areas. The battery pole (2) can be exposed or protrude from the containing space through the open areas.

2. The battery cover plate according to claim 1, wherein One end of the pole hole (11) is provided with a first flange portion (12), and the first flange portion (12) protrudes from the battery cover plate (1) along the thickness direction of the battery cover plate (1); At least a part of the first flange portion (12) is configured to be bent along the direction towards the axis of the pole hole (11) to form the first limiting portion.

3. The battery cover plate according to claim 2, wherein A protruding structure (121) is arranged on the first flange portion (12), and the protruding structure (121) is arranged at the end of the first flange portion (12) far from the battery cover plate (1) along the thickness direction of the battery cover plate (1); The protruding structure (121) is configured to be bent along the direction towards the axis of the pole hole (11) to form the first limiting portion.

4. The battery cover plate according to claim 3, wherein The cross-sectional shape of the battery pole (2) is rectangular, elliptical, trapezoidal or parallelogram-shaped, and the first limiting portions are arranged on both opposite sides of the battery pole (2), and the first limiting portions are arranged at intervals to form the open area.

5. The battery cover plate according to claim 4, wherein Along the thickness direction of the battery cover plate (1), at least four first limiting portions are abutted against one end of the battery pole (2), and at least four first limiting portions are arranged around the circumference of the battery pole (2).

6. The battery cover plate according to claim 2, wherein The other end of the pole hole (11) is provided with a second flange portion (13), and the second flange portion (13) protrudes from the battery cover plate (1) along the thickness direction of the battery cover plate (1); At least a part of the second flange portion (13) is configured to be bent along the direction towards the axis of the pole hole (11) to form the second limiting portion.

7. The battery cover plate according to claim 2, wherein The other end of the pole hole (11) is provided with a second flange portion (13), and the second flange portion (13) extends from the side wall of the pole hole (11) towards the axis direction of the pole hole (11) to form the second limiting portion.

8. Cover plate assembly, characterized in that, Comprising a battery pole (2) and a battery cover plate (1) as described in any one of claims 1-7, the battery pole (2) is limited and fixed between the first limiting portion, the second limiting portion of the battery cover plate (1) and the side wall of the pole hole (11).

9. The cover plate assembly according to claim 8, wherein The cover plate assembly further includes an insulating member (3) and a sealing ring (4). The insulating member (3) is insulated and abutted between the first limiting portion and the battery pole (2), and is insulated and abutted between the side wall of the pole hole (11) and the battery pole (2). The sealing ring (4) is sealed and insulated and abutted between the second limiting portion and the battery pole (2).

10. A battery, characterized in that, Comprising a cover plate assembly as described in any one of claims 8-9.

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