Battery cover plate capable of supplementing liquid and ion battery

Abstract

The utility model relates to a battery cover plate and an ion battery capable of supplementing liquid, the battery cover plate comprises a cover plate body and a sealing assembly, the cover plate body comprises a liquid injection hole, a sealing hole and a through hole along the liquid injection direction of the liquid injection hole, the sealing assembly comprises a sealing rubber nail, a first sealing nail and a second sealing nail, the sealing glue nail and the through hole are hermetically assembled, the first sealing nail and the sealing hole are hermetically assembled, the first sealing nail comprises a peelable area, a stamping thinning area is arranged at the edge of the peelable area, and the second sealing nail is not smaller than the peelable area in area and is the same as the peelable area in shape. According to the battery cover plate, the sealing rubber nail and the through hole are assembled in a sealing manner, the first sealing nail and the sealing hole are assembled in a sealing manner, the sealing performance of the sealing assembly on the liquid injection hole is ensured, the peelable area of the first sealing nail is peeled off along the stamping and thinning area, a window is provided for battery liquid supplementing, and after liquid supplementing, the first sealing nail and the second sealing nail are assembled in a sealing manner through laser welding; and the secondary liquid supplement of the battery can be realized, the disassembly is easy, and the sealing performance is good.

Description

Technical Field

[0001] The utility model belongs to the technical field of batteries, and in particular relates to a battery cover plate capable of replenishing liquid and an ion battery. Background Art

[0002] As one of the four main materials of the battery, the electrolyte continuously reacts with the positive and negative electrodes of the battery and is consumed and decomposed during the battery's charge and discharge cycle. As the amount of electrolyte decreases, the conductivity of electrons inside the battery decreases, and the battery's electrical performance will also decline, which in turn leads to a reduction in the battery's service life.

[0003] In order to extend the service life of ion batteries, fresh electrolyte needs to be added to the ion batteries. In the prior art, a liquid injection hole is provided on the battery cover plate, and electrolyte is injected into the battery through the liquid injection hole. After the liquid injection is completed, the sealing aluminum nails are laser welded and sealed with the cover plate assembly. However, the sealing aluminum nails are difficult to remove, making it difficult to achieve secondary liquid replenishment. Summary of the invention

[0004] The utility model aims to provide a battery cover plate capable of replenishing electrolyte and an ion battery, which can realize secondary replenishment of electrolyte for the ion battery and are easy to disassemble and have good sealing performance.

[0005] The technical solution adopted by the utility model to solve the above-mentioned problem is: a battery cover plate that can be replenished, including a cover plate body and a sealing assembly; the cover plate body includes a liquid injection hole, which is a step hole, and along the injection direction of the liquid injection hole, it includes a sealing hole and a through hole with a gradually decreasing aperture; the sealing assembly includes a sealing nail, a first sealing nail and a second sealing nail, the sealing nail is sealed and assembled with the through hole, the first sealing nail is sealed and assembled with the sealing hole, the first sealing nail includes a peelable area, the edge of the peelable area is provided with a stamping thinning area, and the area of ​​the second sealing nail is not less than that of the peelable area and the shape is the same.

[0006] Preferably, the sealing nail includes a pulling part, an assembly column, and a guide head which are connected in sequence from top to bottom. The pulling part, the assembly column, and the guide head are an integrally formed structure. The end of the guide head close to the assembly column is a cylinder, and the end away from the assembly column is a frustum. The cylindrical diameter of the guide head is smaller than the diameter of the assembly column.

[0007] More preferably, the diameter of the assembly column is larger than the diameter of the through hole, and the assembly column and the through hole are interference fit.

[0008] Preferably, the first sealing pin is provided with a structure matching the sealing hole, specifically, the outer circumference of the first sealing pin is provided with a structure matching the inner circumferential wall of the sealing hole, and the first sealing pin and the sealing hole are sealed and assembled by laser welding.

[0009] Preferably, the peelable area is a circular plate, and the punched thinning area is an annular groove close to the peelable area.

[0010] Preferably, the sealing nail is an elastic sealing nail, the first sealing nail is an aluminum first sealing nail, and the second sealing nail is an aluminum second sealing nail.

[0011] Preferably, the cover body also includes an aluminum substrate, an insulating component is provided at the bottom of the aluminum substrate, an explosion-proof valve is provided in the center of the aluminum substrate, a positive electrode body and a negative electrode body are symmetrically provided on the left and right sides of the aluminum substrate, and the injection hole is located outside the positive electrode body.

[0012] An ion battery comprises a cell assembly, an electrolyte and a battery shell, and also comprises the above-mentioned replenishable battery cover, wherein the battery shell and the replenishable battery cover form a accommodating space, and the cell assembly and the electrolyte are encapsulated in the accommodating space.

[0013] Compared with the prior art, the advantages of the utility model are:

[0014] The utility model discloses a battery cover plate capable of replenishing liquid, comprising a cover plate body and a sealing component, wherein a liquid injection hole is provided on the cover plate body, and a sealing hole and a through hole with a gradually decreasing aperture are sequentially provided along the liquid injection direction, a sealing nail in the sealing component is interference fit with the through hole to realize a sealing assembly, and a first sealing nail in the sealing component is sealed and assembled with the sealing hole by laser welding to ensure the sealing performance of the sealing component to the liquid injection hole; in addition, the first sealing nail comprises a peelable area, a stamping and thinning area is provided at the edge of the peelable area, and the area of ​​the second sealing nail is smaller than the peelable area, so that when the battery needs to be replenished, the peelable area of ​​the first sealing nail is peeled off along the stamping and thinning area to provide a window for replenishing electrolyte in the battery, and then the sealing nail at the through hole is pulled out to replenish liquid, and after the replenishment is completed, the sealing nail is inserted into the through hole again and is interference fit with the through hole to realize a sealing assembly, and then the second sealing nail is placed at the original peelable area position of the first sealing nail, and the first sealing nail and the second sealing nail are sealed and assembled by laser welding, so that the battery can replenish electrolyte and the service life of the battery is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The figure is a schematic diagram of the exploded structure of the battery cover capable of replenishing liquid according to the present invention.

[0016] Figure 2 It is a structural schematic diagram of the cover body of the utility model.

[0017] Figure 3 It is a structural schematic diagram of the sealing nail of the utility model.

[0018] Figure 4 It is a structural schematic diagram of the first sealing nail of the utility model.

[0019] Figure 5 It is a cross-sectional view of the first sealing nail of the utility model.

[0020] Figure 6 It is a schematic diagram of the structure of the first sealing nail during fluid replenishment of the utility model.

[0021] Figure 7 It is a schematic structural diagram of the second sealing nail of the utility model.

[0022] Figure 8 It is a cross-sectional view of the assembly of the sealing component of the utility model and the liquid injection hole in the cover plate body.

[0023] Among them: 1 is the cover body, 1.1 is the injection hole, 1.1.1 is the sealing hole, 1.1.2 is the through hole, 1.2 is the aluminum substrate, 1.3 is the insulating component, 1.4 is the explosion-proof valve, 1.5 is the positive electrode body, 1.6 is the negative electrode body, 2 is the sealing component, 2.1 is the sealing glue nail, 2.1.1 is the extraction part, 2.1.2 is the assembly column, 2.1.3 is the guide head, 2.2 is the first sealing nail, 2.2.1 is the strippable area, 2.2.2 is the stamping thinning, and 2.3 is the second sealing nail. DETAILED DESCRIPTION

[0024] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0025] like Figure 1 As shown, it is a schematic diagram of the exploded structure of the battery cover capable of replenishing liquid according to the present invention.

[0026] A refillable battery cover comprises a cover body 1 and a sealing assembly 2; the cover body 1 comprises a liquid injection hole 1.1, the liquid injection hole 1.1 is a step hole, and along the injection direction of the liquid injection hole 1.1, the liquid injection hole 1.1 comprises a sealing hole 1.1.1 and a through hole 1.1.2 with gradually decreasing apertures; the sealing assembly 2 comprises a sealing nail 2.1, a first sealing nail 2.2 and a second sealing nail 2.3, the first sealing nail 2.2 is an aluminum first sealing nail, and the second sealing nail 2.3 is an aluminum second sealing nail.

[0027] like Figure 2 As shown, this is a schematic structural diagram of the cover body of the utility model.

[0028] Among them, the cover body 1 also includes an aluminum substrate 1.2. The aluminum substrate 1.2 is made of aluminum material, which has the advantages of strong plasticity, good electrical and thermal conductivity, and light weight. An insulating component 1.3 is provided at the bottom of the aluminum substrate 1.2, and an explosion-proof valve 1.4 is provided in the center of the aluminum substrate 1.2. The aluminum substrate 1.2 is symmetrically provided with a positive electrode body 1.5 and a negative electrode body 1.6 on the left and right sides, and the injection hole 1.1 is located on the outside of the positive electrode body 1.5.

[0029] like Figure 8 As shown, it is a cross-sectional view of the assembly of the sealing component of the utility model and the liquid injection hole in the cover plate body.

[0030] The sealing nail 2.1 is sealed and assembled with the through hole 1.1.2. The first sealing nail 2.2 is provided with a structure matching with the sealing hole 1.1.1. Specifically, the outer circumference of the first sealing nail 2.2 is provided with a structure matching with the inner circumferential wall of the sealing hole 1.1.1. The first sealing nail 2.2 and the sealing hole 1.1.1 are sealed and assembled by laser welding.

[0031] like Figure 3 As shown, this is a schematic diagram of the structure of the sealing nail of the utility model.

[0032] The sealing nail 2.1 is made of elastic polymer, that is, it is an elastic sealing nail. The sealing nail 2.1 includes a pulling part 2.1.1, an assembly column 2.1.2, and a guide head 2.1.3 connected in sequence from top to bottom. The pulling part 2.1.1, the assembly column 2.1.2, and the guide head 2.1.3 are an integrally formed structure. The end of the guide head 2.1.3 close to the assembly column 2.1.2 is a cylinder, and the end away from the assembly column 2.1.2 is a frustum. The cylindrical diameter of the guide head 2.1.3 is smaller than the diameter of the assembly column 2.1.2; the diameter of the assembly column 2.1.2 is larger than the diameter of the through hole 1.1.2, and the assembly column 2.1.2 and the through hole 1.1.2 are interference fit to achieve sealed assembly.

[0033] like Figure 4 , Figure 5 , Figure 7 As shown, there are a schematic structural diagram of the first sealing nail of the utility model, a cross-sectional view of the first sealing nail of the utility model, and a schematic structural diagram of the second sealing nail of the utility model.

[0034] The first sealing nail 2.2 includes a peelable area 2.2.1, which is a window for replenishing electrolyte in the battery. A stamped thinned area 2.2.2 is provided at the edge of the peelable area 2.2.1. The shape and area of ​​the second sealing nail 2.3 are equal to the peelable area 2.2.1, that is, the second sealing nail 2.3 matches the peelable area 2.2.1; the peelable area 2.2.1 is a circular plate, and the stamped thinned area 2.2.2 is an annular groove close to the peelable area. The edge of the peelable area 2.2.1 is achieved by reducing the residual thickness by stamping the thinned area 2.2.2. The pressure resistance of this peelable area 2.2.1 is greater than the pressure resistance of the explosion-proof valve 1.4.

[0035] An ion battery comprises a cell assembly, an electrolyte and a battery casing, and also comprises the above-mentioned battery cover plate capable of replenishing liquid.

[0036] The working process of this embodiment is described in detail below with reference to the accompanying drawings:

[0037] The electrolyte is injected through the injection hole 1.1. After the injection is completed, the guide head 2.1.3 of the sealing nail 2.1 is inserted into the through hole 1.1.2 of the injection hole 1.1 in a directional manner. The assembly column 2.1.2 of the sealing nail 2.1 is interference-fitted with the through hole 1.1.2 to achieve a sealed assembly to ensure the airtightness of the battery after the injection is completed. Then, the first sealing nail 2.2 (the first sealing nail at this time is as shown in FIG. 2 ) is inserted into the through hole 1.1.2 of the sealing nail 2.1. Figure 4 As shown in the figure, the sealing hole 1.1.1 of the injection hole 1.1 is laser welded to achieve sealing assembly; when the electrolyte consumption inside the battery is reduced and needs to be replenished, the peelable area 2.2.1 of the first sealing nail 2.2 is peeled off along the stamping thinning area 2.2.2 (the first sealing nail 2.2 at this time is as shown in the figure) Figure 6 As shown), the sealing nail 2.1 at the through hole 1.1.2 is pulled out by the extraction part 2.1.1 to replenish the fluid. After the replenishment is completed, the sealing nail 2.1 is inserted into the through hole 1.1.2 again and is interference fit with the through hole 1.1.2 to achieve a sealed assembly. Then, the second sealing nail 2.3 is placed at the original peelable area 2.2.1 of the first sealing nail 2.2, and the first sealing nail 2.2 and the second sealing nail 2.3 are sealed and assembled by laser welding.

[0038] In addition to the above embodiments, the present invention also includes other implementation modes. Any technical solutions formed by equivalent transformation or equivalent replacement should fall within the protection scope of the claims of the present invention.

Claims

1. A battery cover capable of replenishing liquid, characterized in that: The invention comprises a cover plate body (1) and a sealing assembly (2); the cover plate body (1) comprises a liquid injection hole (1.1), the liquid injection hole (1.1) being a stepped hole, and comprising, along the liquid injection direction of the liquid injection hole (1.1), a sealing hole (1.1.1) and a through hole (1.1.2) with gradually decreasing apertures in sequence; the sealing assembly (2) comprises a sealing glue nail (2.1), a first sealing nail (2.2) and a second sealing nail (2.3); the sealing glue nail (2.1) is sealingly assembled with the through hole (1.1.2); the first sealing nail (2.2) is sealingly assembled with the sealing hole (1.1.1); the first sealing nail (2.2) comprises a peelable area (2.2.1); the edge of the peelable area (2.2.1) is provided with a stamping thinning area (2.2.2); the second sealing nail (2.3) has an area not less than the peelable area (2.2.1) and has the same shape.

2. The battery cover with liquid replenishment according to claim 1, characterized in that: the sealing nail (2.1) comprises a pull-out portion ( 2.1.1), an assembly column (2.1.2), and a guide head (2.1.3), wherein the extraction portion (2.1.1), the assembly column (2.1.2), and the guide head (2.1.3) are an integrally formed structure, wherein the end of the guide head (2.1.3) close to the assembly column (2.1.2) is a cylinder, and the end away from the assembly column (2.1.2) is a truncated cone, and the cylindrical diameter of the guide head (2.1.3) is smaller than the diameter of the assembly column (2.1.2).

3. The battery cover plate capable of replenishing liquid according to claim 2, characterized in that: The diameter of the assembly column (2.1.2) is greater than the diameter of the through hole (1.1.2), and the assembly column (2.1.2) and the through hole (1.1.2) are interference fit.

4. The battery cover capable of replenishing liquid according to claim 1, characterized in that: The first sealing nail (2.2) is provided with a sealing hole ( The first sealing pin (2.2) and the sealing hole (1.1.1) are laser welded to achieve sealing assembly.

5. The battery cover capable of replenishing liquid according to claim 1, characterized in that: The peelable area (2.2.1) is a circular plate, and the punched thinning area (2.2.2) is an annular groove close to the peelable area.

6. The battery cover capable of replenishing liquid according to claim 1, characterized in that: The sealing nail (2.1) is an elastic sealing nail, the first sealing nail (2.2) is an aluminum first sealing nail, and the second sealing nail (2.3) is an aluminum second sealing nail.

7. The battery cover capable of replenishing liquid according to claim 1, characterized in that: The cover plate body (1) further comprises an aluminum substrate (1.2), an insulating component (1.3) is provided at the bottom of the aluminum substrate (1.2), an explosion-proof valve (1.4) is provided at the center of the aluminum substrate (1.2), a positive electrode body (1.5) and a negative electrode body (1.6) are symmetrically provided on left and right sides of the aluminum substrate (1.2), and the injection hole (1.1) is located outside the positive electrode body (1.5).

8. An ion battery, comprising a cell assembly, an electrolyte and a battery casing, characterized in that: It also includes the liquid-replenishable battery cover as described in any one of claims 1-7.

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