Battery cover plate and single battery

Abstract

The utility model belongs to battery technical field discloses a battery cover plate and single battery. It includes cover plate body and explosion -proof valve, is set up at least two explosion -proof holes on cover plate body, all explosion -proof holes are one for the opening, the rest explosion -proof holes are equipped with closed structure, and the closed structure is used for plugging the explosion -proof hole, explosion -proof valve includes at least two explosion -proof parts of being connected, and the explosion -proof part is sealedly connected in the explosion -proof hole one to one, and the burst value of each explosion -proof part is different. The battery cover plate can realize the demand of the same single battery's multiple different burst values, and can adopt the same production line quick switching, improves production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery cover and a single battery cell. Background Technology

[0002] In the battery cover, the explosion-proof valve is the core passive protection device in the cell safety design. Its function is to release energy and gas in a controlled manner when the pressure or temperature inside the battery rises sharply due to abnormal conditions, thereby avoiding more serious safety accidents (such as shell cracking, explosion, electrolyte splashing, etc.).

[0003] Because of differences in the chemical systems, application scenarios, structural designs, and safety strategies of battery cells, the burst value setting of explosion-proof valves must be matched with these factors to achieve a balance between "effective pressure relief and prevention of accidental triggering." However, the burst value of existing explosion-proof valves in battery covers is singular, only suitable for use within a single burst value range. If situations arise where the same battery cover is adapted to different chemical materials (positive electrode, negative electrode, electrolyte), resulting in different burst value settings for different battery cells; or where the same battery cell has different burst value requirements for different application scenarios, then replacing the explosion-proof valve with the corresponding burst value and redesigning and reassembling it for different burst value requirements will be necessary, which is time-consuming and labor-intensive. Even if produced on the same production line, there is a possibility of errors, resulting in low applicability.

[0004] Therefore, there is an urgent need for a battery cover and a single battery cell to solve the above-mentioned technical problems. Utility Model Content

[0005] One objective of this invention is to provide a battery cover that can meet the requirements of multiple different burst values ​​for the same single battery cell, and can be quickly switched on the same production line, thereby improving production efficiency.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] Battery cover, including:

[0008] The cover plate body has at least two explosion-proof holes, one of which is an open hole, and the remaining explosion-proof holes are provided with a sealing structure, which is used to seal the explosion-proof holes.

[0009] An explosion-proof valve, comprising at least two interconnected explosion-proof parts, each explosion-proof part being sealed and connected to the explosion-proof orifice in a corresponding manner, and each explosion-proof part having a different burst value.

[0010] Optionally, at least two of the above-mentioned explosion-proof parts are arranged in a linear array, and at least two of the above-mentioned explosion-proof holes are arranged in a linear array; and / or,

[0011] At least two of the above-mentioned explosion-proof parts are arranged in a ring array, and at least two of the above-mentioned explosion-proof holes are arranged in a ring array.

[0012] Optionally, the explosion-proof part includes a body and explosion-proof grooves, the explosion-proof grooves are formed on the body, and the depth of the explosion-proof grooves in each of the explosion-proof parts is different.

[0013] Optionally, the aforementioned sealing structure includes a sealing adhesive, which fills the aforementioned explosion-proof hole and covers the corresponding explosion-proof part to seal the aforementioned explosion-proof hole.

[0014] Optionally, it also includes an explosion-proof film, which is disposed on the explosion-proof valve.

[0015] Optionally, the shapes of each of the aforementioned explosion-proof parts are different, and the shapes of each of the aforementioned explosion-proof holes are different, with the shapes of the aforementioned explosion-proof parts and the shapes of the aforementioned explosion-proof holes corresponding one-to-one.

[0016] Optionally, it also includes a first insulating member, which is disposed on one side of the cover plate body. The first insulating member has a hollow portion, which corresponds to all of the explosion-proof holes.

[0017] Optionally, it also includes a pole assembly, which is sealed through the cover plate body.

[0018] Optionally, it also includes an injection hole, which is provided on the cover plate body.

[0019] Another objective of this invention is to provide a single battery cell, including the battery cover plate described in any of the above embodiments.

[0020] The beneficial effects of this utility model are:

[0021] This utility model provides a battery cover and a single battery cell. By setting multiple explosion-proof parts with different burst values ​​and integrating them into an explosion-proof valve, each explosion-proof part is connected to a corresponding explosion-proof hole on the cover body. According to the required burst value, the corresponding explosion-proof hole is set as an open hole, and the other explosion-proof holes are set as closed structures. This allows a single type of battery cell to meet the requirements of multiple different burst values ​​during the production process, and it can be quickly switched on the same production line, improving production efficiency and adaptability. Attached Figure Description

[0022] Figure 1 This is an explosion of the concealed portion of the battery cover structure provided in a specific embodiment of this utility model. Figure 1 ;

[0023] Figure 2 This is an explosion of the concealed portion of the battery cover structure provided in a specific embodiment of this utility model. Figure 2 ;

[0024] Figure 3 This is an isometric view of the explosion-proof valve provided in a specific embodiment of this utility model;

[0025] Figure 4 This is an isometric view of the battery cover provided in a specific embodiment of this utility model;

[0026] Figure 5 This is an exploded view of the battery cover provided in a specific embodiment of this utility model.

[0027] In the picture:

[0028] 10. Cover plate body; 11. Explosion-proof hole; 12. Liquid injection hole;

[0029] 20. Explosion-proof valve; 21. Explosion-proof part; 211. Body part; 212. Explosion-proof markings;

[0030] 30. Explosion-proof film;

[0031] 40. First insulating component; 41. Hollowed-out section;

[0032] 50. Pole post assembly; 51. Pole post body; 52. Riveting block; 53. Second insulating component; 54. Sealing component. Detailed Implementation

[0033] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0034] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0036] In the description of this embodiment, the terms "upper," "lower," "left," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0037] The following reference Figures 1 to 5 This invention introduces the battery cover and individual battery cells provided by this utility model.

[0038] Please refer to Figures 1 to 3 This embodiment provides a battery cover, which includes a cover body 10 and an explosion-proof valve 20. The cover body 10 has at least two explosion-proof holes 11. One of the explosion-proof holes 11 is an open hole, and the remaining explosion-proof holes 11 are provided with a sealing structure for sealing the explosion-proof holes 11. The explosion-proof valve 20 includes at least two connected explosion-proof parts 21. The explosion-proof parts 21 are sealed and connected to the explosion-proof holes 11 one by one, and the burst value of each explosion-proof part 21 is different.

[0039] In this embodiment, the battery cover plate integrates multiple explosion-proof parts 21 with different burst values ​​into an explosion-proof valve 20. Each explosion-proof part 21 is connected to a corresponding explosion-proof hole 11 on the cover plate body 10. According to the required burst value, the corresponding explosion-proof hole 11 is set as an open hole, and the other explosion-proof holes 11 are set as closed structures. This allows a single type of battery cell to meet the requirements of multiple different burst values ​​during the production process, and it can be quickly switched on the same production line, improving production efficiency and adaptability.

[0040] Specifically, the explosion-proof part 21 includes a body part 211 and explosion-proof grooves 212. The explosion-proof grooves 212 are formed in the body part 211. The depth of the explosion-proof grooves 212 of each explosion-proof part 21 is different, so that the burst value of each explosion-proof part 21 is different.

[0041] Among them, the shape of the explosion-proof groove 212 is an axisymmetric or centrally symmetric figure. This design ensures that the position of the opening after it is opened will not shift, so that there will be no problem of local venting obstruction during the pressure relief and venting process in various positions inside the battery, thereby improving the reliability of the explosion-proof valve 20.

[0042] Optionally, the shape of the explosion-proof notch 212 may include circles, squares, forks, trapezoids, straight lines, etc., without specific limitations.

[0043] Of course, when the explosion-proof notch 212 is circular, square, or trapezoidal, the perimeter of the explosion-proof notch 212 is smaller than the perimeter of the circle. That is, the explosion-proof notch 212 is not closed. In other words, there is a part of the circle, square, or trapezoidal shape that is not provided with the explosion-proof notch 212, so as to prevent part of the structure of the main body 211 from splashing out and affecting other batteries after the explosion-proof part 21 is opened.

[0044] Specifically, the arrangement of the above-mentioned at least two explosion-proof parts 21 can adopt various arrangements, such as linear arrangement, ring arrangement, etc., without specific limitations here.

[0045] In an optional embodiment, at least two explosion-proof parts 21 are arranged in a linear array, and at least two explosion-proof holes 11 are arranged in a linear array, which can realize the linear arrangement of the explosion-proof parts 21 in the explosion-proof valve 20 and also meet the setting requirements of multiple explosion-proof parts 21.

[0046] In another optional embodiment, at least two explosion-proof parts 21 are arranged in a ring array and at least two explosion-proof holes 11 are arranged in a ring array, which can realize the ring arrangement of explosion-proof parts 21 in explosion-proof valve 20 and also meet the setting requirements of multiple explosion-proof parts 21.

[0047] Specifically, each explosion-proof part 21 has a different shape, and each explosion-proof hole 11 has a different shape. The shapes of the explosion-proof parts 21 and the explosion-proof holes 11 correspond one-to-one. This arrangement can prevent mistakes during the production process. That is, since the explosion-proof parts 21 with different burst values ​​have different shapes, it is easy to determine the position of the explosion-proof parts 21 and explosion-proof holes 11 that meet the required burst value. Moreover, since the explosion-proof holes 11 and explosion-proof parts 21 correspond one-to-one, they will not be installed incorrectly.

[0048] Furthermore, the sealing structure includes a sealant, which is filled into the explosion-proof hole 11 and covered on the corresponding explosion-proof part 21 to seal the explosion-proof hole 11. That is, after the explosion-proof part 21 and the corresponding explosion-proof hole 11 are installed, the explosion-proof hole 11 that does not meet the burst value requirement is filled with sealant, so that it does not have the function of explosion-proof pressure relief.

[0049] Furthermore, the battery cover also includes an explosion-proof film 30, which is disposed on the explosion-proof valve 20 to protect it. The film also seals the explosion-proof valve 20 with the sealant, further ensuring the sealing of the explosion-proof hole 11 where the sealant is applied. Optionally, the explosion-proof film 30 has the same shape as the explosion-proof valve 20 and is disposed on the explosion-proof hole 11.

[0050] Please refer to Figure 4 and Figure 5 In this embodiment, the battery cover also includes a first insulating member 40, which is disposed on one side of the cover body 10. The first insulating member 40 is used to insulate the cover body 10 toward the battery side to avoid short circuits with the battery cells and other structures inside the battery.

[0051] Optionally, the first insulating member 40 is provided with a hollow portion 41, which corresponds to all the explosion-proof holes 11, so as to realize the communication between the explosion-proof valve 20 and the inside of the battery. Specifically, the hollow portion 41 is provided with multiple connecting holes to realize the communication between the explosion-proof valve 20 and the inside of the battery.

[0052] Furthermore, the battery cover also includes an injection hole 12, which is formed on the cover body 10 to allow liquid to be injected into the battery. Of course, after the liquid injection is completed, the injection hole 12 is also provided with a sealing structure to seal the injection hole 12 and achieve the sealing of the internal space of the battery.

[0053] Furthermore, the battery cover also includes a terminal assembly 50, which is sealed through the cover body 10 to achieve electrical connection between the inside and outside of the battery.

[0054] Specifically, the pole assembly 50 includes a pole structure, a second insulating element 53, and a sealing element 54. The pole structure passes through the first insulating element 40 and the cover plate body 10 and is fixedly connected to the cover plate body 10. The sealing element 54 is sleeved on the pole structure and is pressed and compressed by the pole structure and the cover plate body 10 to achieve a seal on the pole structure. The second insulating element 53 is disposed between the side of the cover plate body 10 away from the first insulating element 40 and the pole structure to achieve insulation between the side of the cover plate body 10 away from the first insulating element 40 and the pole structure, thereby achieving safety between the pole assembly 50 and the cover plate body 10.

[0055] Optionally, the pole structure is fixedly connected to the cover plate body 10 by means of riveting, gluing, or other fixing methods.

[0056] Specifically, in this embodiment, the pole structure is riveted to the cover plate body 10. More specifically, the pole structure includes a pole body 51 and a riveting block 52. The pole body 51 is sealed through the first insulating member 40, the cover plate body 10 and the second insulating member 53, and is riveted to the riveting block 52, thereby fixing the pole structure.

[0057] This embodiment also provides a single-cell battery, which includes the battery cover plate described in any of the above-described solutions. By adopting this battery cover plate, the applicability of the single-cell battery is broadened, meeting the needs of various different burst values, and production can be switched on the same production line, greatly reducing production costs and improving production efficiency.

[0058] It should be noted that the specific type of battery cell can be a nickel-metal hydride battery, a nickel-cadmium battery, a lead-acid (or lead-acid) battery, a lithium-ion battery, a polymer lithium-ion battery, etc. The battery cell can also be a primary lithium-ion battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery, or a magnesium-ion battery, etc., which will not be elaborated further here.

[0059] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A battery cover, characterized in that, include: The cover plate body (10) has at least two explosion-proof holes (11) on it. One of the explosion-proof holes (11) is an open hole, and the remaining explosion-proof holes (11) are provided with a closed structure. The closed structure is used to block the explosion-proof holes (11). An explosion-proof valve (20) includes at least two interconnected explosion-proof parts (21), each explosion-proof part (21) being sealed to the explosion-proof hole (11) in a one-to-one correspondence, and each explosion-proof part (21) having a different burst value.

2. The battery cover according to claim 1, characterized in that, At least two of the explosion-proof parts (21) are arranged in a linear array, and at least two of the explosion-proof holes (11) are arranged in a linear array; and / or, At least two of the explosion-proof parts (21) are arranged in a ring array, and at least two of the explosion-proof holes (11) are arranged in a ring array.

3. The battery cover according to claim 1, characterized in that, The explosion-proof part (21) includes a body part (211) and explosion-proof grooves (212). The explosion-proof grooves (212) are formed on the body part (211), and the depth of the explosion-proof grooves (212) of each explosion-proof part (21) is different.

4. The battery cover according to claim 1, characterized in that, The sealing structure includes a sealing adhesive, which fills the explosion-proof hole (11) and covers the corresponding explosion-proof part (21) to seal the explosion-proof hole (11).

5. The battery cover according to claim 1, characterized in that, It also includes an explosion-proof film (30), which is disposed on the explosion-proof valve (20).

6. The battery cover according to any one of claims 1-5, characterized in that, Each of the explosion-proof parts (21) has a different shape, and each of the explosion-proof holes (11) has a different shape. The shapes of the explosion-proof parts (21) and the explosion-proof holes (11) are identical and correspond one-to-one.

7. The battery cover according to claim 1, characterized in that, It also includes a first insulating member (40), which is disposed on one side of the cover plate body (10). The first insulating member (40) has a hollow part (41) which is corresponding to all the explosion-proof holes (11).

8. The battery cover according to claim 1, characterized in that, It also includes a pole assembly (50), which is sealed through the cover plate body (10).

9. The battery cover according to claim 1, characterized in that, It also includes an injection hole (12), which is provided on the cover plate body (10).

10. A single-cell battery, characterized in that, Includes the battery cover as described in any one of claims 1-9.

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