Battery cover plate and battery capable of repeatedly supplementing liquid

Abstract

The utility model provides a battery cover plate and a battery capable of repeatedly supplementing liquid. The battery cover plate comprises a packaging plate body, a sealing element, an elastic gasket and a supporting block, the packaging plate body is provided with a movable liquid injection hole vertically penetrating through the outer abutting face, a first thread is arranged on the inner wall of the movable liquid injection hole, the sealing piece comprises a sealing insertion rod and a limiting end connected with one end of the sealing insertion rod, and a second thread matched with the first thread is arranged on the periphery of the sealing insertion rod. The elastic gasket is provided with a first matching hole corresponding to the movable liquid injection hole, the supporting block is provided with a second matching hole corresponding to the first matching hole, and the sealing insertion rod can sequentially penetrate through the second matching hole, the first matching hole and the movable liquid injection hole to enable the limiting end to abut against the supporting block. According to the utility model, the supporting block and the elastic gasket are arranged, and the supporting block is in elastic contact with the packaging plate body through the elastic gasket, so that the deformation of the packaging plate body caused by rigid contact in the prior art can be avoided, the stress area of the packaging plate body is increased, and the stress is more uniform.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field, concretely relates to a battery cover plate and the battery of repeatable liquid supplement. BACKGROUND

[0002] The traditional lithium ion battery cannot be supplemented with liquid again after the injection hole of the battery cover plate is sealed, and the capacity of the battery will decrease due to electrolyte loss in long cycle, resulting in shortening of the cycle life of the battery; in addition, some battery systems are used in high-temperature environments, and the battery is prone to produce gas during the cycle process, which causes the battery to expand and the shell to crack, and also affects the lithium ion embedding and causes the battery to precipitate lithium, affecting the service life and even causing safety hazards.

[0003] The patent document with the application number CN202320562313.0 discloses a novel positive electrode conductive lithium battery cover plate, which is provided with an injection hole and a fixing bolt. In the sealed state, the fixing bolt is inserted into the injection hole and threadedly cooperates with the injection hole. In this technical solution, the battery cover plate is relatively thin and has low strength, and the nut is prone to be squeezed against the battery cover plate and cause deformation of the battery cover plate during the tightening process of the fixing bolt, which affects the sealing quality.

[0004] The patent document with the application number CN202120815165.X discloses a non-welded cover plate injection structure, which includes an end cover and a sealing element. The end cover is provided with an injection hole, and the sealing element includes a screw and a rubber ring. In this technical solution, the rubber ring plays an elastic transition role to avoid rigid contact between the nut and the end cover. However, in order to limit the rubber ring, the end of the injection hole generally needs to be provided with a stepped counterbore, and the setting of the counterbore reduces the local thickness of the end cover at the injection hole, affecting the overall structural strength of the end cover. UTILITY MODEL CONTENTS

[0005] In order to solve the above problems, the utility model provides a battery cover plate and a battery that can be repeatedly supplemented with liquid. The battery cover plate has a liquid injection structure that can be repeatedly opened and closed. After the injection hole is opened, new electrolyte can be added to the battery, prolonging the service life of the battery, and the liquid injection structure has little effect on the overall structural strength of the battery cover plate, making the battery structure more stable.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] The utility model provides a battery cover plate, including the sealing board body, sealing piece, elastic gasket and support block, the outside of sealing board body forms the outer abutment surface, sealing board body has the movable liquid injection hole which vertically through the outer abutment surface, the inner wall of movable liquid injection hole is provided with first screw thread, the sealing piece includes sealing plug rod and the limit end head who is connected with the one end of sealing plug rod, the outer periphery of sealing plug rod is equipped with the second screw thread with first screw thread cooperation, the both sides of elastic gasket form first elastic abutment surface and second elastic abutment surface respectively, and elastic gasket has the first cooperation hole which passes through first elastic abutment surface and second elastic abutment surface, the both sides of support block form first support surface and second support surface respectively, and support block has the second cooperation hole which passes through first support surface and second support surface, first elastic abutment surface is used to with the outer abutment surface meets and makes first cooperation hole with movable liquid injection hole position correspondence, first support surface is used to with second elastic abutment surface meets and makes second cooperation hole with first cooperation hole position correspondence, sealing plug rod can pass through second cooperation hole, first cooperation hole and movable liquid injection hole in proper order and makes limit end head with second support surface abut.

[0008] Further, the second cooperation hole is connected with a counterbore at one end close to the second support surface, and the second support surface is formed inside the counterbore.

[0009] Further, when the limit end head abuts against the second support surface, the limit end head is retracted inside the counterbore.

[0010] Further, the sealing board body has a plurality of movable liquid injection holes, the elastic gasket has a plurality of first cooperation holes corresponding in number and position to the movable liquid injection holes, and the support block has a plurality of second cooperation holes corresponding in number and position to the first cooperation holes.

[0011] Further, the plurality of movable liquid injection holes are arranged rotationally symmetrically relative to the center of the outer abutment surface.

[0012] Further, the area of the second elastic abutment surface is not less than that of the first support surface, and when the first support surface abuts against the second elastic abutment surface, the first support surface is limited within the second elastic abutment surface.

[0013] Further, the limit end head is provided with a rotating bayonet at the side away from the sealing plug rod.

[0014] Further, the sealing board body is further provided with a sealed liquid injection hole, and when the first elastic abutment surface abuts against the outer abutment surface, the sealed liquid injection hole is outside the first elastic abutment surface.

[0015] Further, the sealing board body is further provided with a sealing limiting part, which is arranged around the sealed liquid injection hole and protrudes relative to the outer abutment surface.

[0016] Another purpose of the utility model lies in providing a battery capable of repeatedly adding liquid, which comprises a shell and the above-mentioned battery cover plate, and the edge of the shell is integrally welded with the edge of the battery cover plate.

[0017] The utility model can achieve the following beneficial effects:

[0018] 1. The utility model discloses a detachable connection between the sealing element and the movable liquid injection hole, and the new electrolyte can be added to the battery through the movable liquid injection hole after the sealing element is removed, and the gas generated in the battery can be released, thereby prolonging the service life of the battery.

[0019] 2. The utility model discloses a supporting block and an elastic gasket, the limiting end of the sealing element abuts against the supporting block instead of the packaging plate body, and the supporting block and the packaging plate body are elastically contacted through the elastic gasket, thereby avoiding the deformation of the limiting end and the packaging plate body caused by the rigid contact in the prior art, and the supporting block and the elastic gasket increase the stress area of the packaging plate body and make the stress more uniform, thereby further improving the structural stability of the packaging plate body.

[0020] 3. In some embodiments, the packaging plate body is provided with a sealed liquid injection hole and a movable liquid injection hole, and the sealed liquid injection hole is used to add electrolyte to the battery during batch processing and production, so that the original liquid injection and packaging process of the battery does not need to be greatly changed, thereby improving the production stability. DRAWINGS

[0021] Figure 1 It is an assembly structure diagram of the battery cover plate in the embodiment.

[0022] Figure 2 It is an exploded view of the battery cover plate in the embodiment.

[0023] Figure 3 It is Figure 2 front view.

[0024] In the figure, 1 is a packaging plate body, 11 is an outer abutting surface, 12 is a movable liquid injection hole, 13 is a sealed liquid injection hole, 14 is a sealing limiting part, 2 is an elastic gasket, 21 is a first elastic abutting surface, 22 is a second elastic abutting surface, 23 is a first matching hole, 3 is a supporting block, 31 is a first supporting surface, 32 is a second supporting surface, 33 is a second matching hole, 34 is a counterbore, 4 is a sealing element, 41 is a sealing plug rod, and 42 is a limiting end. DETAILED DESCRIPTION

[0025] The technical solutions of the utility model will be clearly and completely described below in connection with the embodiments, obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the ordinary skilled in the art without making creative labor belong to the protection scope of the utility model. Embodiments

[0026] With reference to Figures 1-3 The utility model provides a battery cover plate, it includes encapsulation board body 1, elastic gasket 2, support block 3 and sealing element 4,

[0027] Encapsulation board body 1 is disc structure, and one side of encapsulation board body forms outer abutment surface 11, and encapsulation board body is equipped with two movable liquid injection hole 12, and movable liquid injection hole penetrates the outer abutment surface, and the two movable liquid injection holes are rotationally symmetrical with the center of the circle of the outer abutment surface, and the inner wall of movable liquid injection hole is provided with first screw thread, and one sealed liquid injection hole 13 is provided at the position away from the center of the circle of the outer abutment surface, and the connecting line of the sealed liquid injection hole and the center of the circle of the outer abutment surface is perpendicular to the connecting line of the two movable liquid injection holes, and the periphery of the sealed liquid injection hole is provided with the sealing limiting portion 14 of the annular structure that is protruded relative to the outer abutment surface;

[0028] The two sides of elastic gasket 2 form first elastic abutment surface 21 and second elastic abutment surface 22 respectively, and elastic gasket is equipped with two first matching holes 23, and first matching hole penetrates first elastic abutment surface and second elastic abutment surface, and the axial center distance of two first matching holes is consistent with the axial center distance of two movable liquid injection holes;

[0029] The two sides of support block 3 form first support surface 31 and second support surface 32 respectively, and support block 3 is provided with two second matching holes 33, and second matching hole penetrates first support surface and second support surface, and the axial center distance of two second matching holes is consistent with the axial center distance of two first matching holes, and the second matching hole is connected with counterbore 34 at the end close to second support surface;

[0030] Sealing element 4 includes sealing insertion rod 41 and limiting end 42 fixedly connected with one end of sealing insertion rod, and the outer periphery of sealing insertion rod is provided with second screw thread matched with first screw thread, and the side away from sealing insertion rod of limiting end is provided with rotating bayonet that can be clamped with dismounting tool and drives sealing element to rotate;

[0031] In the assembled state, the first elastic abutting surface 21 of the elastic gasket is attached to the outer abutting surface 11 of the packaging plate body and makes the first matching hole 23 and the position of the movable liquid injection hole 12 one-to-one, the first supporting surface 31 of the supporting block is attached to the second elastic abutting surface 22 of the elastic gasket and makes the second matching hole 33 and the first matching hole 23 one-to-one, the sealing plug 41 of the sealing member passes through the second matching hole 33, the first matching hole 23 and the movable liquid injection hole 12 in sequence and forms a threaded connection with the movable liquid injection hole, and the limiting end 42 abuts against the second supporting surface 32 of the supporting block, so that the supporting block, the elastic gasket and the packaging plate body are tightly attached, and the limiting end is retracted in the inner part of the counterbore 34, thereby reducing the space occupation.

[0032] The utility model also provides a battery of liquid supplementing repeatedly, the battery includes casing and above-mentioned battery cover plate, the casing is hollow cylinder structure, the inside of casing has for filling the content that can take place electrochemistry reaction, the edge of casing's end part and the edge of battery cover plate are integrally sealed connection through welding process, namely get the battery of assembly completion of liquid injection.

[0033] The utility model discloses a liquid injection principle as follows: first, using the existing liquid injection process, injecting electrolyte into the battery to be injected through the sealed liquid injection hole, and after injection, carrying out plugging through the conventional sealing welding process, thereby obtaining the battery of liquid injection completion; when the battery is used for a period of time, the sealing member can be rotated by using a tool, so that the sealing member is separated from the movable liquid injection hole, new electrolyte can be added to the inside of the battery through the movable liquid injection hole, and the movable liquid injection hole can be used for exhausting, and after the electrolyte is added, the sealing member is rotated into the movable liquid injection hole again.

[0034] Because the utility model sets up supporting block and elastic gasket, the limiting end of sealing member abuts against supporting block instead of packaging plate body, and the supporting block and the packaging plate body are in elastic contact through the elastic gasket, can avoid the deformation of the limiting end and the packaging plate body rigid contact in prior art, and the setting of supporting block and elastic gasket makes the stress area of packaging plate body increase, and the stress is more uniform, further improves the structural stability of packaging plate body.

[0035] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the present application has been described in detail, for the skilled in the art, it still can be modified, or for part of the technical features of the equivalent replacement, the spirit and principles of the present application, made any modification, equivalent replacement, improvement, etc., should be included within the scope of the present application.

Claims

1. A battery cover plate, characterized by: The utility model provides a battery cover plate, which comprises a packaging plate body (1), an elastic gasket (2), a supporting block (3) and a sealing element (4), wherein the outer side of the packaging plate body (1) forms an outer abutting surface (11), the packaging plate body has a movable liquid injection hole (12) vertically penetrating through the outer abutting surface, and the inner wall of the movable liquid injection hole is provided with a first thread; the sealing element (4) comprises a sealing plug rod (41) and a limiting end (42) connected to one end of the sealing plug rod, and the outer periphery of the sealing plug rod is provided with a second thread matched with the first thread; the two sides of the elastic gasket (2) respectively form a first elastic abutting surface (21) and a second elastic abutting surface (22), the elastic gasket has a first matching hole (23) penetrating through the first elastic abutting surface and the second elastic abutting surface; the two sides of the supporting block (3) respectively form a first supporting surface (31) and a second supporting surface (32), and the supporting block has a second matching hole (33) penetrating through the first supporting surface and the second supporting surface; the first elastic abutting surface is used for abutting against the outer abutting surface and making the first matching hole correspond in position to the movable liquid injection hole, the first supporting surface is used for abutting against the second elastic abutting surface and making the second matching hole correspond in position to the first matching hole, and the sealing plug rod can pass through the second matching hole, the first matching hole and the movable liquid injection hole in sequence and make the limiting end abut against the second supporting surface.

2. The battery cover plate of claim 1, wherein: The second matching hole is connected with a counterbore (34) at one end close to the second supporting surface, and the second supporting surface is formed in the counterbore.

3. The battery cover plate of claim 2, wherein: When the limiting end abuts against the second supporting surface, the limiting end is retracted in the counterbore.

4. The battery cover plate of claim 1, wherein: The packaging plate body has a plurality of movable liquid injection holes, the elastic gasket has a plurality of first matching holes corresponding in number and position to the movable liquid injection holes, and the supporting block has a plurality of second matching holes corresponding in number and position to the first matching holes.

5. A battery cover plate according to claim 4, wherein: The plurality of movable liquid injection holes are arranged in rotational symmetry relative to the center of the outer abutting surface.

6. The battery cover plate of claim 1, wherein: The area of the second elastic abutting surface is not less than that of the first supporting surface, and when the first supporting surface abuts against the second elastic abutting surface, the first supporting surface is limited within the second elastic abutting surface.

7. The battery cover plate of claim 1, wherein: The side of the limiting end away from the sealing plug rod is provided with a rotating bayonet.

8. The battery cover plate of claim 1, wherein: The packaging plate body is further provided with a sealed liquid injection hole (13), and when the first elastic abutting surface abuts against the outer abutting surface, the sealed liquid injection hole is located outside the first elastic abutting surface.

9. A battery cover plate according to claim 8, wherein: The packaging plate body is further provided with a sealing limiting part (14), which is arranged around the sealed liquid injection hole and protrudes relative to the outer abutting surface.

10. A refillable battery, characterized by: The utility model provides a battery cover plate, which comprises a packaging plate body (1), an elastic gasket (2), a supporting block (3) and a sealing element (4), wherein the outer side of the packaging plate body (1) forms an outer abutting surface (11), the packaging plate body has a movable liquid injection hole (12) vertically penetrating through the outer abutting surface, and the inner wall of the movable liquid injection hole is provided with a first thread; the sealing element (4) comprises a sealing plug rod (41) and a limiting end (42) connected to one end of the sealing plug rod, and the outer periphery of the sealing plug rod is provided with a second thread matched with the first thread; the two sides of the elastic gasket (2) respectively form a first elastic abutting surface (21) and a second elastic abutting surface (22), the elastic gasket has a first matching hole (23) penetrating through the first elastic abutting surface and the second elastic abutting surface; the two sides of the supporting block (3) respectively form a first supporting surface (31) and a second supporting surface (32), and the supporting block has a second matching hole (33) penetrating through the first supporting surface and the second supporting surface; the first elastic abutting surface is used for abutting against the outer abutting surface and making the first matching hole correspond in position to the movable liquid injection hole, the first supporting surface is used for abutting against the second elastic abutting surface and making the second matching hole correspond in position to the first matching hole, and the sealing plug rod can pass through the second matching hole, the first matching hole and the movable liquid injection hole in sequence and make the limiting end abut against the second supporting surface.

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