Battery cover plate capable of releasing pressure repeatedly and battery

Abstract

The utility model relates to the technical field of batteries, in particular to a battery cover plate capable of relieving pressure repeatedly and a battery, the battery cover plate capable of relieving pressure repeatedly comprises a cover plate main body and a pressure relief main body, the cover plate main body is provided with a mounting part, the mounting part is provided with a through hole, and a first sealing surface is formed on a part of the inner side wall of the through hole; the pressure relief main body is in threaded connection with the mounting part, a blocking piece is arranged on the side, facing the mounting part, of the pressure relief main body, the blocking piece can be inserted into the through hole, and a second sealing face is formed on part of the peripheral wall of the blocking piece. According to the utility model, the pressure relief and sealing effects of the battery are realized through the blocking piece.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery cover plate and a battery capable of repeatedly relieving pressure. Background Art

[0002] During the use of square hard-shell batteries, such as lithium-ion batteries and sodium-ion batteries, chemical substances inside the battery (positive and negative electrodes and electrolyte, etc.) react to produce gases. When these gases accumulate enough, the pressure increases, causing the battery shell to swell.

[0003] In the prior art, a pressure relief valve is usually set on the battery cover of the battery to achieve battery pressure relief. However, in order to ensure the sealing of the battery, a sealing structure, such as a sealing ring, is separately set between the pressure relief valve and the battery cover to ensure the sealing. The separately set sealing structure not only increases the material cost, but also increases the labor cost due to the increase in assembly processes, thereby increasing the production cost of the battery. Utility Model Content

[0004] The main purpose of the utility model is to provide a battery cover plate capable of repeatedly relieving pressure, aiming to achieve battery pressure relief and sealing through a pressure relief body.

[0005] In order to achieve the above-mentioned purpose, the battery cover capable of repeatedly releasing pressure provided by the utility model comprises:

[0006] A cover plate body, wherein the cover plate body is provided with a through hole, wherein the through hole comprises a flared section and a straight section communicating with the flared section, wherein an inner peripheral wall of the flared section forms a first sealing surface; and

[0007] A pressure relief body, the pressure relief body is detachably connected to the cover plate body, a blocking piece is provided on a side of the pressure relief body facing the mounting portion, the blocking piece is adapted to the through hole, and the blocking piece can be inserted into the through hole;

[0008] The battery cover capable of repeatedly releasing pressure has a sealed state, and in the sealed state, the blocking member can abut against the first sealing surface.

[0009] In one embodiment of the utility model, the plugging member includes a sealing section and a plugging section connected to the sealing section, the sealing section is set to a truncated cone structure, and the outer peripheral wall of the sealing section forms a second sealing surface; the cross-sectional area of ​​the flared section gradually increases from one end of the flared section connected to the straight section to one end of the flared section away from the straight section;

[0010] In the sealing state, the second sealing surface seals against the first sealing surface.

[0011] In one embodiment of the utility model, the cover plate body is provided with a mounting portion, the mounting portion has the through hole; the pressure relief body is detachably connected to the mounting portion;

[0012] Wherein, in the sealed state, the mounting portion and the pressure relief body are in sealing contact with each other on two facing surfaces to form a sealing extension section.

[0013] In one embodiment of the utility model, the pressure relief body includes a pressure relief cover body and the blocking piece, and the blocking piece is arranged on the side of the pressure relief cover body facing the mounting portion; the inner circumferential wall of the pressure relief cover body is provided with a first internal thread, and the outer circumferential wall of the mounting portion is provided with a first external thread matched with the first internal thread, and the pressure relief cover body is screwed to the mounting portion.

[0014] In an embodiment of the present invention, the pressure relief cover body and the plugging member are an integrally formed structure.

[0015] In an embodiment of the present invention, a portion of the structure on the outer circumference of the pressure relief cover body forms a rotating portion.

[0016] In an embodiment of the present invention, an outer hexagonal nut is provided on the outer peripheral wall of the pressure relief cover body, so that the pressure relief cover body forms the rotating part.

[0017] In one embodiment of the utility model, the cover plate body has an electrode column and a busbar, the electrode column is arranged on the side of the cover plate body where the mounting portion is provided, and the busbar is arranged on the side of the cover plate body facing away from the mounting portion; the electrode column includes a positive electrode column and a negative electrode column, and each of the busbars is aligned with one of the positive electrode columns or the negative electrode column.

[0018] In an embodiment of the present invention, the cover plate body is provided with an electrode identification portion, and each of the electrode identification portions is respectively arranged close to the positive electrode column and the negative electrode column.

[0019] The utility model also provides a battery, which comprises a battery cover plate capable of repeatedly relieving pressure and a battery body as described above, wherein the battery cover plate capable of repeatedly relieving pressure is connected to the end of the battery body.

[0020] In the technical solution of the present utility model, the battery cover plate that can repeatedly release pressure includes a cover plate body and a pressure relief body that can be detachably connected to the cover plate body, the cover plate body is provided with a through hole, and the pressure relief body is provided with a plugging piece on the side facing the mounting portion, and the plugging piece can be inserted into the through hole. When it is necessary to release the gas inside the battery, part of the structure of the plugging piece is separated from the cover plate body, so that the gas is released from the gap between the two, thereby avoiding the battery from swelling due to gas accumulation, which is beneficial to extending the battery life; further, the through hole includes a flared section and a straight section connected to the flared section, and the inner peripheral wall of the flared section forms a first sealing surface, and the shape of the plugging piece is adapted to the shape of the through hole. When the plugging piece abuts against the through hole, the battery can be in a sealed state to prevent leakage of the electrolytic cell in the battery, and the battery cover plate that can repeatedly release pressure proposed by the utility model does not need to be provided with an additional sealing structure, thereby reducing the assembly process and materials of the battery, and reducing the economic cost of the battery cover plate that can repeatedly release pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0022] Figure 1 A top view of an embodiment of a battery cover capable of repeatedly relieving pressure provided by the utility model;

[0023] Figure 2 A front view of an embodiment of a battery cover capable of repeatedly relieving pressure provided by the utility model;

[0024] Figure 3 For along Figure 2 Sectional view of AA in the middle;

[0025] Figure 4 The cross-sectional view is a cover plate body of an embodiment of a battery cover plate capable of repeatedly relieving pressure provided by the utility model.

[0026] Description of Figure Numbers:

[0027] Label name Label name 10 Cover body 105 Electrode column 101 Installation Department 106 Manifold 10a Through hole 20 Pressure relief body 102 First sealing surface 201 Blocking parts 10a1 Flared section 202 Second sealing surface 10a2 Straight section 2011 Sealing section 103 Rotating part 2012 Blockage section 104 Hexagon nut 107 Electrode identification part

[0028] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0031] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0032] The battery cover plate capable of repeatedly releasing pressure provided by the utility model is as follows: Figures 1 to 4 As shown, including:

[0033] The cover plate body 10 is provided with a through hole 10a, the through hole 10a includes a flared section 10a1 and a straight section connected to the flared section 10a1, and the inner peripheral wall of the flared section 10a1 forms a first sealing surface 102; and

[0034] The pressure relief body 20 is detachably connected to the cover body 10. A plugging piece 201 is provided on one side of the pressure relief body 20 facing the through hole 10a. The plugging piece 201 is adapted to the through hole 10a and can be inserted into the through hole 10a.

[0035] The battery cover that can repeatedly release pressure has a sealed state. In the sealed state, the blocking member 201 can abut against the first sealing surface 102 .

[0036] In the technical solution of the utility model, the battery cover capable of repeatedly relieving pressure comprises a cover body 10 and a pressure relief body 20 detachably connected to the cover body 10, the cover body is provided with a through hole 10a, and a plugging member 201 is provided on the side of the pressure relief body 20 facing the mounting portion 101, and the plugging member 201 can be plugged into the through hole 10a. When it is necessary to release the gas inside the battery, part of the structure of the plugging member 201 is separated from the cover body 10, so that the gas is released from the gap between the two, thereby preventing the battery from swelling due to gas accumulation, which is beneficial to prolonging the battery life; further The through hole 10a includes a flared section 10a1 and a straight section connected to the flared section 10a1. The inner peripheral wall of the flared section 10a1 forms a first sealing surface 102. The shape of the plugging member 201 is adapted to the shape of the through hole 10a. When the plugging member 201 abuts against the through hole 10a, the battery can be in a sealed state to prevent leakage of the electrolytic cell in the battery. The battery cover plate that can be repeatedly depressurized proposed by the utility model does not need to be provided with an additional sealing structure, which reduces the assembly process and materials of the battery and reduces the economic cost of the battery cover plate that can be repeatedly depressurized.

[0037] In this embodiment, the cover body 10 can be set to a flat plate shape so as to serve as a part of the battery housing. It can be detachably connected to the battery or it can be an integral structure. A through hole 10a is provided on the cover body 10. The through hole 10a includes a flared section 10a1 and a straight section connected to the flared section 10a1. The flared section 10a1 can form a flared hole in the shape of a truncated cone or a hemispherical cone, which is not limited here. The inner peripheral wall of the flared section 10a1 forms a first sealing surface 102.

[0038] The pressure relief body 20 can be snapped or screwed to the cover body 10 so that the two can be detachably connected. A plugging piece 201 is provided on the side of the pressure relief body 20 facing the mounting portion 101. The plugging piece 201 is adapted to the through hole 10a. The plugging piece 201 can be inserted into the through hole 10a. When the pressure relief body 20 is connected to the cover body 10, the battery cover that can repeatedly relieve pressure is in a sealed state. In the sealed state, the plugging piece 201 can abut the first sealing surface 102 to achieve the effect of sealing the battery.

[0039] In one embodiment of the present invention, Figure 3 and Figure 4 As shown, the plugging member 201 includes a sealing section 2011 and a plugging section 2012 connected to the sealing section 2011. The sealing section 2011 is set as a truncated cone structure, and the outer peripheral wall of the sealing section 2011 forms a second sealing surface 202; the cross-sectional area of ​​the flared section 10a1 gradually increases from one end of the flared section 10a1 connected to the straight section 10a2 to the end of the flared section 10a1 away from the straight section 10a2;

[0040] In the sealed state, the second sealing surface 202 seals against the first sealing surface 102 .

[0041] In this embodiment, the plugging member 201 includes a sealing section 2011 and a plugging section 2012 connected to the sealing section 2011. The sealing section 2011 and the plugging section 2012 are integrally formed structures. The sealing section 2011 is set as a truncated cone structure. The outer peripheral wall of the sealing section 2011 forms a second sealing surface 202. Further, the cross-sectional area of ​​the flared section 10a1 gradually increases from one end of the flared section 10a1 connected to the straight section 10a2 to the end of the flared section 10a1 away from the straight section 10a2, so that the sealing section 2011 can be plugged into the flared section 10a1, and the second sealing surface 202 seals against the first sealing surface 102 to achieve the effect on the battery. It can be understood that the hemispherical shape of the sealing section 2011 is adapted to the flared section 10a1.

[0042] In one embodiment of the present invention, Figures 1 to 4 As shown, the cover plate body 10 is provided with a mounting portion 101, and the mounting portion 101 has a through hole 10a; the pressure relief body 20 is detachably connected to the mounting portion 101;

[0043] In the sealed state, the mounting portion 101 and the pressure relief body 20 are in sealing contact with each other on two facing surfaces to form a sealed extension section.

[0044] In this embodiment, the cover body 10 is provided with a mounting portion 101, which protrudes from the cover body 10 and is an integrally formed structure with the cover body 10. The mounting portion 101 has a through hole 10a that penetrates the cover body 10, and the pressure relief body 20 can be snapped or screwed to the mounting portion 101. In a sealed state, the mounting portion 101 and the pressure relief body 20 are sealed and abutted on two facing surfaces to form a sealed extension section, thereby further improving the sealing effect of the battery cover that can repeatedly relieve pressure on the battery; at the same time, the mounting portion 101 protrudes from the cover body 10 so as to provide a larger installation space when installing the pressure relief body 20.

[0045] In one embodiment of the present invention, Figure 3 As shown, the pressure relief body 20 includes a pressure relief cover body and a plugging piece 201. The plugging piece 201 is arranged on the side of the pressure relief cover body facing the mounting portion 101. The inner circumferential wall of the pressure relief cover body is provided with a first internal thread, and the outer circumferential wall of the mounting portion 101 is provided with a first external thread matched with the first internal thread. The pressure relief cover body is screwed to the mounting portion 101.

[0046] In this embodiment, the pressure relief body 20 includes a pressure relief cover body and a plugging member 201. The plugging member 201 is arranged on the side of the pressure relief cover body facing the mounting portion 101. The inner peripheral wall of the pressure relief cover body is provided with a first internal thread, and the outer peripheral wall of the mounting portion 101 is provided with a first external thread matched with the first internal thread. The pressure relief cover body is screwed to the mounting portion 101. When the pressure relief cover body is completely tightened on the mounting portion 101, the mounting portion 101 and the pressure relief cover body are sealed against each other on two surfaces facing each other. The sealing section 2011 exerts a pressure on the flaring section 10a1 so that the first sealing surface 102 is sealed against the second sealing surface 202, thereby further improving the sealing effect of the battery cover plate that can repeatedly relieve pressure on the battery.

[0047] In one embodiment of the present invention, the pressure relief cover body and the plugging member 201 are an integrally formed structure.

[0048] In this embodiment, the pressure relief cover body and the plugging member 201 are integrally formed to enhance the structural strength of the pressure relief body 20 and reduce the probability of fracture between the plugging member 201 and the pressure relief cover body.

[0049] In one embodiment of the present invention, Figure 1 and Figure 2 As shown, part of the structure on the outer peripheral side of the pressure relief cover body forms the rotating portion 103.

[0050] In this embodiment, a portion of the structure on the outer circumference of the pressure relief cover body forms a rotating portion 103 so that the pressure relief cover body can be installed on the cover plate body 10 manually or with the aid of a disassembly tool such as a wrench.

[0051] In one embodiment of the present invention, Figure 1 and Figure 2 As shown, an outer hexagonal nut 104 is provided on the outer peripheral wall of the pressure relief cover body so that the pressure relief cover body forms a rotating portion 103 .

[0052] In this embodiment, an external hexagonal nut 104 is welded to the outer peripheral wall of the pressure relief cover body, and the external hexagonal nut 104 is sleeved on the pressure relief cover body to form a rotating part 103 of the pressure relief cover body. The external hexagonal nut 104 can provide a larger rotating area and improve the convenience of installation.

[0053] In one embodiment of the present invention, Figure 1 As shown, the cover body 10 has an electrode column 105 and a busbar 106. The electrode column 105 is arranged on the side of the cover body 10 where the mounting portion 101 is provided, and the busbar 106 is arranged on the side of the cover body 10 facing away from the mounting portion 101. The electrode column 105 includes a positive column and a negative column, and each busbar 106 corresponds to a positive column or a negative column.

[0054] In one embodiment of the utility model, the cover body 10 has an electrode column 105 and a busbar 106. The electrode column 105 is arranged on a side of the cover body 10 where the mounting portion 101 is provided, and the busbar 106 is arranged on a side of the cover body 10 that is away from the mounting portion 101. The electrode column 105 includes a positive column and a negative column. Each busbar 106 corresponds to a positive column or a negative column. When the battery cover that can repeatedly release pressure is installed on a battery, the electric energy is collected through the busbar 106.

[0055] In one embodiment of the present invention, Figure 1 As shown, the cover body 10 is provided with electrode identification parts 107, and each electrode identification part 107 is respectively arranged close to the positive electrode column and the negative electrode column.

[0056] In one embodiment of the present invention, the cover body 10 is provided with an electrode identification portion 107, and the electrode identification portion 107 includes a positive electrode identification portion and a negative electrode identification portion. Each electrode identification portion 107 is respectively arranged close to the positive electrode column and the negative electrode column to play a prompting role.

[0057] The utility model also proposes a battery, which includes a battery cover that can repeatedly release pressure and a battery body. The battery cover that can repeatedly release pressure is connected to the end of the battery body. By separating part of the structure of the blocking member 201 from the cover body 10, the gas in the battery can be discharged.

[0058] The above are only preferred embodiments of the present invention, and do not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A battery cover capable of repeatedly releasing pressure, characterized in that: The battery cover capable of repeatedly releasing pressure comprises: A cover plate body (10), the cover plate body (10) being provided with a through hole (10a), the through hole (10a) comprising a flared section (10a1) and a straight section (10a2) communicating with the flared section (10a1), the inner peripheral wall of the flared section (10a1) forming a first sealing surface (102); and a pressure relief body (20), the pressure relief body (20) being detachably connected to the cover plate body (10), a blocking piece (201) being provided on a side of the pressure relief body (20) facing the through hole (10a), the blocking piece (201) being adapted to the through hole (10a), and the blocking piece (201) being insertable into the through hole (10a); The battery cover capable of repeatedly releasing pressure has a sealed state, and in the sealed state, the blocking member (201) can abut against the first sealing surface (102).

2. The battery cover capable of repeatedly releasing pressure as claimed in claim 1, characterized in that: The plugging member (201) comprises a sealing section (2011) and a plugging section connected to the sealing section (2011); the sealing section (2011) is configured as a truncated cone structure, and the outer peripheral wall of the sealing section (2011) forms a second sealing surface (202); the cross-sectional area of ​​the flared section (10a1) gradually increases from one end of the flared section (10a1) connected to the straight section (10a2) to one end of the flared section (10a1) away from the straight section (10a2); In the sealed state, the second sealing surface (202) seals against the first sealing surface (102).

3. The battery cover capable of repeatedly releasing pressure as claimed in claim 1 or 2, characterized in that: The cover plate body (10) is provided with a mounting portion (101), and the mounting portion (101) has the through hole (10a); the pressure relief body (20) is detachably connected to the mounting portion (101); Wherein, in the sealed state, two facing surfaces of the mounting portion (101) and the pressure relief body (20) are sealed and abutted against each other to form a sealed extension section.

4. The battery cover capable of repeatedly releasing pressure as claimed in claim 3, characterized in that: The pressure relief body (20) comprises a pressure relief cover body and a plugging member (201); the plugging member (201) is arranged on a side of the pressure relief cover body facing the mounting portion (101); an inner peripheral wall of the pressure relief cover body is provided with a first internal thread, and an outer peripheral wall of the mounting portion (101) is provided with a first external thread matched with the first internal thread; the pressure relief cover body is screwed to the mounting portion (101).

5. The battery cover capable of repeatedly releasing pressure as claimed in claim 4, characterized in that: The pressure relief cover body and the blocking member (201) are an integrally formed structure.

6. The battery cover capable of repeatedly releasing pressure as claimed in claim 4, characterized in that: Part of the structure on the outer peripheral side of the pressure relief cover body forms a rotating portion (103).

7. The battery cover capable of repeatedly releasing pressure as claimed in claim 6, characterized in that: An outer hexagonal nut (104) is provided on the outer peripheral wall of the pressure relief cover body so that the pressure relief cover body forms the rotating part (103).

8. The battery cover capable of repeatedly releasing pressure as claimed in claim 3, characterized in that: The cover plate body (10) comprises an electrode column (105) and a busbar (106); the electrode column (105) is arranged on a side of the cover plate body (10) where the mounting portion (101) is provided, and the busbar (106) is arranged on a side of the cover plate body (10) that is away from the mounting portion (101); the electrode column (105) comprises a positive electrode column and a negative electrode column, and each of the busbars (106) corresponds to one of the positive electrode columns or one of the negative electrode columns.

9. The battery cover capable of repeatedly releasing pressure as claimed in claim 8, characterized in that: The cover plate body (10) is provided with an electrode identification portion (107), and each of the electrode identification portions (107) is respectively arranged close to the positive electrode column and the negative electrode column.

10. A battery, characterized in that: The battery comprises a battery cover plate capable of repeatedly relieving pressure as claimed in any one of claims 1 to 9 and a battery body, wherein the battery cover plate capable of repeatedly relieving pressure is connected to an end of the battery body.

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