Novel battery top cover structure easy to use

Abstract

The invention discloses an easy-to-use novel battery top cover structure, which comprises a substrate, two ends of the inner side of the substrate are provided with pole columns, and the outer surfaces of the pole columns are provided with injection molding covered edges; the brake frame is arranged on the lower surface of the base plate; the anti-explosion valve plate is fixed to the inner side of a pressure relief hole formed in the middle of the inner side of the base plate, and a protective net plate corresponding to the anti-explosion valve plate is arranged on the inner side of the brake frame; the patch is arranged on the upper surface of the substrate to cover the anti-explosion valve plate; according to the explosion-proof valve plate detection device, the wiring terminal, the insulation pad, the second conducting strip, the first conducting strip, the adjusting block and the fixing base are arranged, the explosion-proof valve plate can be detected in time before the explosion-proof valve plate is broken, so that early warning and manual maintenance are facilitated, the overhaul convenience is improved, the limiting ring, the ceramic gasket and the connecting ring block are arranged, and the safety of the explosion-proof valve plate is improved. According to the device, the contact effect of the pole and the sealing ring can be greatly improved during installation, and firm sealing of the periphery of the pole in the long-term use process is guaranteed.

Description

Technical Field

[0001] The present invention specifically relates to a new type of battery top cover structure that is easy to use. Background Art

[0002] The battery top cover refers to the upper cover part of the battery, especially those used in rechargeable batteries or certain electronic devices. It is the external closed part of the battery, which plays a role in protecting the internal battery components, preventing external substances from entering the battery, and ensuring the normal operation of the battery inside. With the development of power lithium batteries, the technical requirements for the battery top cover are becoming more and more strict. Generally, an explosion-proof valve sheet is provided on the battery top cover to release the gas generated due to accidental failures inside the battery housing, so as to avoid explosion after excessive gas accumulates inside the battery housing.

[0003] The existing explosion-proof valve sheet structure is relatively simple. Usually, only after the explosion-proof valve sheet is damaged and the gas is released, can it be found that there is too much gas accumulated inside the battery housing. However, this causes environmental pollution by the released gas, and the high temperature of the gas also poses a safety impact on the surrounding batteries. There is also a risk of electrolyte leakage due to the damage of the explosion-proof valve sheet, and it cannot well give an early warning of the generated gas. In addition, a sealing ring for insulating with the cover plate is usually placed at the lower end of the pole column of the battery top cover. The sealing ring cannot produce effective deformation contact with the pole column during installation, resulting in poor sealing performance. Therefore, we propose a new type of battery top cover structure that is easy to use. Summary of the Invention

[0004] The purpose of the present invention is to provide a new type of battery top cover structure that is easy to use, so as to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A new type of battery top cover structure that is easy to use, including:

[0006] A substrate, with pole columns provided at both ends inside the substrate, and the outer surface of the pole columns has an injection molding edge.

[0007] A brake frame, arranged on the lower surface of the substrate;

[0008] An explosion-proof valve sheet, fixed inside the pressure relief hole opened in the middle of the inner side of the substrate, and a protective mesh plate corresponding to the explosion-proof valve sheet is provided inside the brake frame;

[0009] A patch, arranged on the upper surface of the substrate to cover the explosion-proof valve sheet;

[0010] An early warning component, arranged between the explosion-proof valve sheet and the patch to give an early warning to the outside when the explosion-proof valve sheet reaches a predetermined deformation.

[0011] Preferably, the warning component includes a terminal, an insulating pad, a second conductive sheet, a first conductive sheet, an adjusting block and a fixing seat. The fixing seat is fixed to the lower surface of the patch. The adjusting block is connected to the inner side of the fixing seat through a threaded portion. The lower surface of the adjusting block has a first conductive sheet, and the first conductive sheet is cooperated with the terminal fixed on the patch through a first wire. The second conductive sheet and the insulating pad are sequentially fixed on the explosion-proof valve sheet from top to bottom, and the second conductive sheet is cooperated with the terminal through a second wire.

[0012] Preferably, the explosion-proof valve sheet includes a fixing portion, an elastic portion and a connecting portion. The fixing portion is fixed to the lower end inside the substrate. An elastic portion protrudes upward inside the fixing portion, and a connecting portion is provided inside the elastic portion.

[0013] Preferably, the fixing seat is annular.

[0014] Preferably, a stepped hole for cooperating with the pole column is opened inside the substrate. The stepped hole includes a connecting ring block and an interference fit member inside. The connecting ring block and the interference fit member are sequentially distributed from inside to outside along the radial direction of the stepped hole. A sealing ring for insulating sealing is provided inside the connecting ring block. A limiting ring for pressing the pole column and the sealing ring to be in close contact is sleeved on the outer surface of the connecting ring block. A ceramic washer is provided on the lower surface of one end of the limiting ring. A connecting piece for electrically connecting with the pole column is provided on the lower surface of the braking frame.

[0015] Preferably, a protrusion for enabling the sealing ring to move unidirectionally is formed by the inner surface of the connecting ring block extending inward and downward. A threaded portion for cooperating with the limiting ring is provided on the outer surface of the connecting ring block.

[0016] Preferably, a first through hole is penetrated and opened inside the connecting ring block.

[0017] Preferably, the limiting ring includes a ring section, an elastic section and a pressing section. The ring section is connected to the connecting ring block through a thread. A ceramic washer is fixed to the top of one side wall of the ring section. One end of the ceramic washer has a pressing section for pressing the pole column to contact the sealing ring.

[0018] Preferably, a second through hole corresponding to the first through hole is penetrated and opened inside the elastic section.

[0019] Preferably, the explosion-proof valve sheet is oval.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] (1) The present invention is provided with a terminal, an insulating pad, a second conductive sheet, a first conductive sheet, an adjusting block and a fixing seat, which avoids that when there is too much gas generated inside the battery case, the gas pressure can only be released to the outside by the rupture of the explosion-proof valve sheet. Before the explosion-proof valve sheet ruptures, this device can detect the explosion-proof valve sheet in time, so as to give an early warning and facilitate manual maintenance, improving the convenience of maintenance, and can avoid the released gas from affecting the surrounding batteries, improving the safety of the surrounding batteries. The structure is simple and easy to use.

[0022] (2) By providing a limiting ring, a ceramic gasket and a connecting ring block, it avoids the traditional situation when installing the pole column. The pole column is directly placed on the sealing ring without causing the sealing ring to be extruded and deformed, resulting in poor contact sealing effect. This device can greatly improve the contact effect between the pole column and the sealing ring during installation, reduce the loosening and falling off of the sealing ring, has good firmness in installing the sealing ring, ensures the firm sealing around the pole column during long-term use, and reduces the leakage of electrolyte. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of the present invention;

[0024] Figure 2 is an explosion structural diagram of the present invention;

[0025] Figure 3 is a schematic cross-sectional structure diagram of the substrate of the present invention;

[0026] Figure 4 is a schematic structural diagram of the explosion-proof valve sheet of the present invention;

[0027] Figure 5 is a schematic connection structure diagram of the pole column and the sealing ring of the present invention;

[0028] Figure 6 is a schematic cross-sectional structure diagram of the connecting ring block of the present invention;

[0029] Figure 7 is a schematic cross-sectional structure diagram of the limiting ring of the present invention.

[0030] In the figure: 1. Substrate; 101. Step hole; 2. Patch; 3. Pole column; 4. Injection molding edge; 5. Brake frame; 6. Explosion-proof valve sheet; 601. Fixed part; 602. Elastic part; 603. Connecting part; 7. Connecting sheet; 8. Sealing ring; 901. Terminal; 902. Insulating pad; 903. Second conductive sheet; 904. First conductive sheet; 905. Adjusting block; 906. Fixing seat; 11. Limiting ring; 111. Ring section; 112. Elastic section; 113. Pressing-down section; 114. Second through hole; 12. Ceramic gasket; 13. Connecting ring block; 131. Protrusion; 132. External thread; 133. First through hole; 14. Interference fit part. Detailed implementation manners

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0032] Please refer to Figures 1-7 , the present invention provides a technical solution: a new type of battery top cover structure that is easy to use, including:

[0033] A substrate 1, with pole columns 3 provided at both ends inside the substrate 1, and an injection molding edge 4 on the outer surface of the pole columns 3;

[0034] A braking frame 5, arranged on the lower surface of the substrate 1;

[0035] An explosion-proof valve sheet 6, fixed inside a pressure relief hole opened in the middle inside the substrate 1, and a protective net plate corresponding to the explosion-proof valve sheet 6 is provided inside the braking frame 5 to prevent objects inside the battery case from coming into contact with the explosion-proof valve sheet 6 and affecting the rupture and pressure relief of the explosion-proof valve sheet 6;

[0036] A patch 2, arranged on the upper surface of the substrate 1 to cover the explosion-proof valve sheet 6;

[0037] An early warning component, arranged between the explosion-proof valve sheet 6 and the patch 2, to give an early warning to the outside when the explosion-proof valve sheet 6 reaches a predetermined deformation, so as to facilitate the explosion-proof valve sheet 6 to deform itself after gas is generated inside the battery case, and give an early warning to the outside before releasing gas to the outside, to avoid the sudden rupture of the explosion-proof valve sheet 6 when the gas volume inside the battery case is too large and the released gas affects the surrounding batteries.

[0038] Preferably, the warning component includes a terminal 901, an insulating pad 902, a second conductive sheet 903, a first conductive sheet 904, an adjusting block 905 and a fixing seat 906. The fixing seat 906 is fixed to the lower surface of the patch 2. The adjusting block 905 is connected to the inner side of the fixing seat 906 through a threaded portion. The lower surface of the adjusting block 905 has a first conductive sheet 904, and the first conductive sheet 904 is matched with the terminal 901 fixed on the patch 2 through a first wire. The second conductive sheet 903 and the insulating pad 902 are sequentially fixed on the explosion-proof valve sheet 6 from top to bottom, and the second conductive sheet 903 is matched with the terminal 901 through a second wire, which is convenient for detecting the deformation effect of the explosion-proof valve sheet 6 in time after the explosion-proof valve sheet 6 is affected by the gas inside the battery case. When the first conductive sheet 904 contacts the second conductive sheet 903, the circuit is turned on to give an external warning. Gas is generated inside the battery case, and if not processed in time, there is a risk that the explosion-proof valve sheet 6 will rupture and release gas to the outside.

[0039] Preferably, the explosion-proof valve sheet 6 includes a fixing portion 601, an elastic portion 602 and a connecting portion 603. The fixing portion 601 is fixed to the lower end inside the substrate 1. An elastic portion 602 protrudes upward inside the fixing portion 601, and a connecting portion 603 is provided inside the elastic portion 602, which is convenient for better moving the connecting portion 603 upward to drive the second conductive sheet 903 to contact the first conductive sheet 904 thereon, so as to turn on the circuit for warning.

[0040] Preferably, the fixing seat 906 is annular, which is convenient for adjusting the position of the first conductive sheet 904, and further can adjust the distance between the first conductive sheet 904 and the second conductive sheet 903, so as to adjust the different warning effects caused by different displacement amounts of the connecting portion 603.

[0041] Preferably, a stepped hole 101 matching the pole 3 is provided inside the substrate 1. The inside of the stepped hole 101 includes a connecting ring block 13 and an interference fit member 14. The connecting ring block 13 and the interference fit member 14 are sequentially distributed along the radial direction of the stepped hole 101 from inside to outside. A sealing ring 8 for insulating sealing is provided inside the connecting ring block 13. A limiting ring 11 for pressing the pole 3 and the sealing ring 8 into close contact is sleeved on the outer surface of the connecting ring block 13, and a ceramic washer 12 is provided on the lower surface of one end of the limiting ring 11. A connecting piece 7 for electrically connecting with the pole 3 is provided on the lower surface of the brake bracket 5, which is convenient for better causing the sealing ring 8 to undergo elastic deformation, and further improving the contact sealing effect between the pole 3 and the sealing ring 8, and between the substrate 1 and the sealing ring 8.

[0042] Preferably, a protrusion 131 for moving the sealing ring 8 unidirectionally is formed by the inner surface of the connecting ring block 13 extending inward and downward. A threaded portion for cooperating with the limiting ring 11 is provided on the outer surface of the connecting ring block 13, which is convenient for better avoiding the accidental falling off or skewing of the sealing ring 8 after the sealing ring 8 is placed inside the stepped hole 101, and ensuring the installation effect of the sealing ring 8.

[0043] Preferably, a first through hole 133 is formed through the inner side of the connecting ring block 13.

[0044] Preferably, the limiting ring 11 includes a ring section 111, an elastic section 112 and a pressing section 113. The ring section 111 is connected to the connecting ring block 13 by threads, and a ceramic washer 12 is fixed to the top of one side wall of the ring section 111. One end of the ceramic washer 12 has a pressing section 113 that presses against the sealing ring 8 in contact with the pole column 3, so that the pressing section 113 has a good elastic effect, so that the sealing ring 8 can maintain elastic sealing for a long time.

[0045] Preferably, a second through hole 114 corresponding to the first through hole 133 is formed through the inner side of the elastic section 112, which is convenient for filling multiple parts inside the stepped hole 101 with the injection molding edge 4 generated during injection molding, so as to improve the connection firmness and prevent the pole column 3 or the sealing ring 8 from moving.

[0046] Preferably, the explosion-proof valve piece 6 is oval, which is convenient for a better pressure relief area.

[0047] The working principle and usage process of the present invention: When in use, the sealing ring 8 and the pole column 3 are sequentially placed inside the stepped hole 101. The convex 131 can make the sealing ring 8 closely contact with the substrate 1, preventing the sealing ring 8 from accidentally coming out of the stepped hole 101. Then, the limiting ring 11 and the connecting ring block 13 are matched through the threaded part, so that the elastic section 112 and the pressing section 113 press down on the pole column 3, making the pole column 3 and the sealing ring 8 closely cooperate. The elasticity of the elastic section 112 can greatly improve the contact sealing effect between the pole column 3 and the sealing ring 8. Then, an injection molding edge 4 is formed by injection molding between the substrate 1 and the pole column 3, thus completing the fixation of the pole column 3. The connection firmness is good, and it can further improve the insulation sealing around the pole column 3. After being finally installed on the battery, if gas is generated inside the battery case, the excessive gas volume will cause the elastic part 602 to deform. At this time, the connecting part 603 drives the second conductive sheet 903 to move upward until the second conductive sheet 903 reaches a predetermined amount of deformation to contact the first conductive sheet 904, thereby realizing electrical conduction between the first wire and the second wire. When the external circuit connected to the terminal 901 detects a conduction path, a warning will be generated for battery inspection and replacement. When the gas continues to accumulate inside the battery case, the connection between the explosion-proof valve piece 6 and the substrate 1 will break, and then the gas will be discharged to the outside through the pressure relief hole inside the substrate 1 to release the pressure.

[0048] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A new type of battery top cover structure that is easy to use, characterized in that: include: A substrate (1), wherein poles (3) are arranged at both ends of the inner side of the substrate (1), and the outer surface of the poles (3) has an injection-molded edging (4); A brake frame (5) is arranged on the lower surface of the base plate (1); The explosion-proof valve plate (6) is fixed to the inner side of the pressure relief hole opened in the middle of the inner side of the base plate (1), and the inner side of the brake frame (5) is provided with a protective mesh plate corresponding to the explosion-proof valve plate (6); A patch (2) is arranged on the upper surface of the substrate (1) to cover the explosion-proof valve plate (6); The early warning component is arranged between the explosion-proof valve plate (6) and the patch (2) to issue an early warning to the outside when the explosion-proof valve plate (6) reaches a predetermined deformation.

2. The novel battery top cover structure according to claim 1 is characterized in that: The early warning component comprises a wiring terminal (901), an insulating pad (902), a second conductive sheet (903), a first conductive sheet (904), an adjusting block (905) and a fixing seat (906); the fixing seat (906) is fixed to the lower surface of the patch (2); the adjusting block (905) is connected to the inner side of the fixing seat (906) through a threaded portion; the lower surface of the adjusting block (905) has a first conductive sheet (904); the first conductive sheet (904) is matched with the wiring terminal (901) fixed on the patch (2) through a first wire; the second conductive sheet (903) and the insulating pad (902) are fixed to the explosion-proof valve sheet (6) in sequence from top to bottom; and the second conductive sheet (903) is matched with the wiring terminal (901) through a second wire.

3. The novel battery top cover structure according to claim 2 is characterized in that: The explosion-proof valve plate (6) comprises a fixing portion (601), an elastic portion (602) and a connecting portion (603); the fixing portion (601) is fixed to the lower end of the inner side of the base plate (1); the inner side of the fixing portion (601) is upwardly protruding to form an elastic portion (602); and the inner side of the elastic portion (602) has a connecting portion (603).

4. The novel battery top cover structure according to claim 2 is characterized in that: The fixing seat (906) is annular.

5. The novel battery top cover structure according to claim 1 is characterized in that: The inner side of the substrate (1) is provided with a stepped hole (101) which cooperates with the pole (3). The inner side of the stepped hole (101) includes a connecting ring block (13) and an interference fit piece (14). The connecting ring block (13) and the interference fit piece (14) are sequentially distributed from the inside to the outside along the radial direction of the stepped hole (101). The inner side of the connecting ring block (13) has a sealing ring (8) for insulating and sealing. The outer surface of the connecting ring block (13) is sleeved with a limiting ring (11) for pressing the pole (3) and the sealing ring (8) into close contact. The lower surface of one end of the limiting ring (11) is provided with a ceramic gasket (12). The lower surface of the brake frame (5) is provided with a connecting piece (7) which is electrically connected to the pole (3).

6. The novel battery top cover structure according to claim 5 is characterized in that: The inner surface of the connecting ring block (13) extends inward and downward to form a protrusion (131) for enabling the sealing ring (8) to move in one direction, and the outer surface of the connecting ring block (13) is provided with a threaded portion that cooperates with the limiting ring (11).

7. The novel battery top cover structure according to claim 5 is characterized in that: A first through hole (133) is formed through the inner side of the connecting ring block (13).

8. The novel battery top cover structure according to claim 7 is characterized in that: The limiting ring (11) comprises a ring segment (111), an elastic segment (112) and a pressing segment (113); the ring segment (111) is connected to the connecting ring block (13) via threads, and a ceramic gasket (12) is fixed to the top of one side wall of the ring segment (111); one end of the ceramic gasket (12) has a pressing segment (113) for pressing the pole (3) to contact the sealing ring (8).

9. The novel battery top cover structure according to claim 8 is characterized in that: A second through hole (114) corresponding to the first through hole (133) is formed through the inner side of the elastic section (112).

10. The novel battery top cover structure according to claim 1 is characterized in that: The explosion-proof valve plate (6) is oval in shape.

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