Battery conductive terminal and battery
By die-casting the graphite rod with the battery conductive terminal body and exposing it to the outer conductive surface, combined with aluminum alloy or copper alloy or stainless steel materials, the problems of low conductivity and large electrical energy loss in the prior art are solved, and more efficient Conductivity and better contact quality.
Patent Information
- Application Number
- CN202420491101.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-14
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-03-14
AI Technical Summary
The existing battery conductive terminals are made of aluminum alloy material, which leads to low conductivity, large heat generation, large power loss, and oxidation problems, affecting contact quality.
采用石墨棒与端子主体压铸在一起，并在外导电面暴露，结合铝合金或铜合金或不锈钢材料，设计密封环和焊接面以提高导电性能和密封性。
It improves conductive performance, reduces power loss, avoids oxidation problems, ensures contact quality and sealing, and enhances the safety and performance of the battery.
Smart Images
Figure CN222282195U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of batteries, in particular to a battery conductive terminal and a battery. Background Art
[0002] New energy vehicles require a large number of power batteries. The demand for power batteries is huge, and the current is very large when working. Cylindrical batteries usually have an explosion-proof structure at the positive electrode and a conductive terminal at the negative electrode. Some conductive terminals on the market use aluminum alloy as raw material. The conductivity of aluminum alloy is relatively low, about 28% to 34% of the conductivity of pure aluminum, and lower than the conductivity of copper. This is due to its crystal structure and material characteristics. Aluminum alloy contains impurities of other elements, which will scatter the electrons in the crystal and hinder the movement and conduction of electrons. At the same time, this conductive terminal generates a lot of heat and causes a large loss of electrical energy.
[0003] For example, application number: CN201920834719.3 A battery cover, the disclosed aluminum terminal uses aluminum as the raw material, which will cause the above problems.
[0004] For example, the application number: CN201820193250.5 discloses a battery aluminum terminal recessed step structure, and the terminal is also made of aluminum, which will also cause the above problems. Utility Model Content
[0005] In view of this, the present invention aims at the deficiencies of the prior art, and its main purpose is to provide a battery conductive terminal, which not only improves the conductive performance, but also has low power loss and good contact quality, thereby overcoming the deficiencies of the prior art.
[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0007] The present application provides a battery conductive terminal, comprising a terminal body and at least one graphite rod; the graphite rod and the terminal body are die-cast together, and the graphite rod is exposed on the outer conductive surface of the terminal body;
[0008] The terminal body includes a base plate and a column perpendicular to the base plate; a welding surface is formed on the top boss of the column; a sealing ring is convexly provided on the inner side surface of the base plate; an insulating first sealing ring is sleeved on the column; a sealing groove at the bottom of the first sealing ring is embedded in the sealing ring; the bottom of the first sealing ring has a flange, which is flush with the side of the base plate.
[0009] Preferably, the welding surface is provided with a rough surface or a welding groove.
[0010] Preferably, the boss is sleeved with non-flammable insulating adhesive, and the adhesive can adhere to the bottom of the battery cell inside the battery.
[0011] Preferably, the sealing ring is 0.5-1.5 mm away from the side edge of the bottom plate, and the sealing ring is 1-2 mm away from the side of the column.
[0012] Preferably, a limiting portion is convexly provided on the side surface of the column, and the limiting portion presses the top of the first sealing ring.
[0013] Preferably, the terminal body is a die-cast component of aluminum alloy, copper alloy or stainless steel.
[0014] A battery comprises a battery conductive terminal, a shell, an end cover, and a battery cell; the battery conductive terminal blocks the lower opening of the shell, and the end cover blocks the lower opening of the shell; the battery cell is arranged inside the shell, the first pole ear of the battery cell is welded to the welding surface, and the second pole ear of the battery cell is welded to the end cover.
[0015] Preferably, the end cover comprises an insulating plastic shell, a top cover, an insulating ring, an explosion-proof plate, and a bottom cover; the insulating ring is sleeved on the second boss on the explosion-proof plate; a thinning groove is pressed on the explosion-proof plate; the edge of the explosion-proof plate is bent and embedded in the edge of the bottom cover, and the inner wall of the plastic shell is provided with a first limiting protrusion, a second limiting protrusion, and a third limiting protrusion in sequence from top to bottom; the top cover, the insulating ring, the explosion-proof plate, and the bottom cover are pressed into the plastic shell; the first limiting protrusion presses the edge of the top cover; the second limiting protrusion presses the explosion-proof plate; the third limiting protrusion supports the bent edge of the explosion-proof plate.
[0016] Preferably, the plastic shell is sleeved on the upper part of the outer shell, and the plastic shell and the outer shell are engaged with each other.
[0017] Compared with the prior art, the utility model has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical solution that the graphite rod and the terminal body are die-cast together; the graphite rod is exposed on the outer conductive surface of the terminal body. Among them, the graphite rod can improve the structure of the terminal body, play a role in reducing resistance, reducing terminal heating, and reducing power loss. At the same time, the stability of graphite is very good, and it can be used as an external contact terminal for conductivity, there is no problem of oxidation, and the contact is good. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a schematic diagram of the terminal body of the first embodiment of the utility model.
[0019] Figure 2 It is a front view schematic diagram of the first embodiment of the utility model.
[0020] Figure 3 It is a cross-sectional schematic diagram of the first embodiment of the present utility model.
[0021] Figure 4 It is a cross-sectional schematic diagram of the second embodiment of the present utility model.
[0022] Figure 5 This is the second embodiment of the utility model Figure 4 A partial enlarged schematic diagram.
[0023] Figure 6 It is a schematic diagram of the exploded end cover of the second embodiment of the present utility model.
[0024] Description of the accompanying drawings:
[0025] 10. Terminal body; 11. Bottom plate; 12. External conductive surface; 13. Post; 14. Limiting part; 15. Boss; 16. Welding surface; 17. Glue; 18. Graphite rod; 20. First sealing ring; 21. Sealing groove; 22. Flange; 23. Sealing ring; 30. End cover; 31. Top cover; 32. Insulating ring; 33. Explosion-proof disk; 34. Second boss; 35. Bottom cover; 36. Shell; 37. Protruding ring; 38. Thinning groove; 310. Battery cell; 311. First pole ear; 312. Second pole ear; 320. Plastic shell; 321. First limiting convex block; 322. Second limiting convex block; 323. Third limiting convex block; 324. Annular groove; 325. Protruding ring. DETAILED DESCRIPTION
[0026] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments. Embodiment 1
[0027] Please refer to Figures 1 to 3 As shown, it shows the specific structure of a preferred embodiment of the utility model, which is a battery conductive terminal.
[0028] The graphite rod 18 and the terminal body 10 are die-cast together, which improves the conductivity and reduces the power loss.
[0029] The present application provides a battery conductive terminal, comprising a terminal body 10 and at least one graphite rod 18; the graphite rod 18 and the terminal body 10 are die-casted together, and the graphite rod 18 is exposed on the outer conductive surface 12 of the terminal body 10; the terminal body 10 comprises a bottom plate 11 and a column 13 perpendicular to the bottom plate 11; a welding surface 16 is formed on the top boss 15 of the column 13; a sealing ring 23 is convexly provided on the inner side surface of the bottom plate 11; an insulating first sealing ring 20 is sleeved on the column 13; a sealing groove 21 at the bottom of the first sealing ring 20 is embedded in the sealing ring 23; the first sealing ring 20 has a flange 22 at the bottom, and the flange 22 is flush with the side surface of the bottom plate 11. One or more graphite rods 18 and the terminal body 10 are die-casted together, and then the conductive terminal is sent to a CNC device for processing, so that the graphite rod 18 is exposed on the outer conductive surface 12 of the terminal body 10, so that the graphite can be used as an external contact terminal. The welding surface 16 formed on the top boss 15 of the column 13 is welded to the negative electrode of the battery cell 310. When the conductive terminal is assembled with the shell 36, the conductive terminal is pressed into the lower opening of the shell 36, and the terminal body 10 presses the first sealing ring 20 against the lower opening of the shell 36, and at the same time, part of the side surface of the first sealing ring 20 is pressed against the inner wall of the shell 36 by the column 13. Therefore, under the elastic force of the first sealing ring 20, the terminal body 10 can be firmly fixed to the lower opening of the shell 36. The sealing groove 21 at the bottom of the first sealing ring 20 is embedded in the sealing ring 23; the first sealing ring 20 has a flange 22 at the bottom, and the flange 22 is flush with the side of the bottom plate 11. This design makes the terminal body 10 very well sealed when it is pressed into the lower opening of the shell 36, and the assembly method is also simple.
[0030] Preferably, the welding surface 16 is provided with a rough surface or a welding groove, which is conducive to making the negative electrode ear of the battery cell 310 more firmly and firmly welded to the welding surface 16 to ensure the conductive quality. During welding, the molten solder will fully merge with the rough surface or the welding groove, which can further ensure the firmness of the welding.
[0031] Preferably, a non-combustible insulating adhesive 17 is sleeved on the boss 15, and the adhesive 17 can adhere to the bottom of the battery cell 310 inside the battery. When the conductive terminal is pressed into the shell 36, the adhesive 17 adheres to the bottom of the battery cell 310, which is conducive to fixing the position of the battery cell 310 and preventing the battery cell 310 from shaking in the shell 36.
[0032] Preferably, the sealing ring 23 is 0.5-1.5 mm away from the side edge of the bottom plate 11, and 1-2 mm away from the side of the column 13. This design is conducive to allowing the first sealing ring 20 to be firmly sleeved on the column 13 while being fully fitted with the bottom plate 11, and at the same time preventing the first sealing ring 20 from loosening.
[0033] Preferably, a stopper 14 is convexly provided on the side of the column 13, and the stopper 14 presses the top of the first sealing ring 20. When the first sealing ring 20 is sleeved on the column 13, the stopper 14 presses the top of the first sealing ring 20, which is conducive to ensuring that the first sealing ring 20 is fully fitted with the bottom plate 11, so that the first sealing ring 20 will not loosen.
[0034] Preferably, the terminal body 10 is a die-cast component made of aluminum alloy, copper alloy or stainless steel. Embodiment 2
[0035] Please refer to Figure 4-6 As shown, a battery comprises a battery conductive terminal, a shell 36, an end cover 30, and a battery cell 310; the battery conductive terminal blocks the lower opening of the shell 36, and the end cover 30 blocks the lower opening of the shell 36; the battery cell 310 is arranged inside the shell 36, the first pole ear 311 of the battery cell 310 is welded to the welding surface 16, and the second pole ear 312 of the battery cell 310 is welded to the end cover 30. The end cover 30 has an explosion-proof effect and can improve the safety of the battery. During assembly, the battery cell 310 is placed in the shell 36, the first pole ear 311 of the battery cell 310 is welded to the welding surface 16 of the column 13, and then the terminal body 10 is pressed into the shell 36, and then the second pole ear 312 of the battery cell 310 is welded to the end cover 30, and finally the end cover 30 is pressed on the upper opening of the shell 36, so that the battery is assembled, which is very convenient.
[0036] Preferably, the end cover 30 includes an insulating plastic shell 320, a top cover 31, an insulating ring 32, an explosion-proof disc 33, and a bottom cover 35; the insulating ring 32 is sleeved on the second boss 3415 on the explosion-proof disc 33; a thinning groove 38 is pressed on the explosion-proof disc 33; the edge of the explosion-proof disc 33 is bent and embedded in the edge of the bottom cover 35, and the inner wall of the plastic shell 320 is provided with a first limiting protrusion 321, a second limiting protrusion 322, and a third limiting protrusion 323 from top to bottom; the top cover 31, the insulating ring 32, the explosion-proof disc 33, and the bottom cover 35 are pressed into the plastic shell 320; the first limiting protrusion 321 presses the edge of the top cover 31; the second limiting protrusion 322 presses the explosion-proof disc 33; the third limiting protrusion 323 supports the bent edge of the explosion-proof disc 33. The explosion-proof disc 33 is provided with a thinning groove, which is beneficial to improve the safety of the battery. If the internal pressure of the battery is too large, it can be cracked at the position of the thinning groove 38 to prevent the battery from exploding. The top cover 31 and the bottom cover 35 are provided with pressure relief holes, which can be used for pressure relief. When the end cover 30 is assembled, the edge of the explosion-proof disc 33 is bent and wrapped around the edge of the bottom cover 35, and then the two are welded together, and the insulating ring 32 is sleeved on the second boss 3415 on the explosion-proof disc 33. When the top cover 31, the insulating ring 32, the explosion-proof disc 33, and the bottom cover 35 are pressed into the plastic shell 320, the first limiting protrusion 321 presses the edge of the top cover 31; the second limiting protrusion 322 presses the explosion-proof disc 33; the third limiting protrusion 323 supports the bent edge of the explosion-proof disc 33, so that the end cover 30 can be assembled together, which is very convenient.
[0037] Preferably, the plastic shell 320 is sleeved on the upper part of the outer shell 36, and the plastic shell 320 and the outer shell 36 are engaged with each other. Preferably, the inner wall of the plastic shell 320 is provided with an annular groove 324, and the outer wall of the top of the outer shell 36 is provided with a convex ring 37, and the annular groove 324 and the convex ring 37 are engaged together. More preferably, the top of the outer shell 36 is designed to be stepped to support the plastic shell 320, which is conducive to improving the convenience of assembly and the amount of pressure of the end cover 30 on the outer shell 36.
[0038] In summary, the design focus of the utility model is that the graphite rod 18 and the terminal body 10 are die-cast together, and then further processed by CNC equipment; the graphite rod 18 is exposed on the outer conductive surface 12 of the terminal body 10 and can be used as a conductive end without oxidation problems. The graphite rod 18 is die-cast on the terminal body 10, and its structure is improved, which plays a role in reducing resistance, reducing terminal heating, and reducing power loss.
[0039] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.
Claims
1. A battery conductive terminal, characterized in that: It comprises a terminal body and at least one graphite rod; the graphite rod and the terminal body are die-cast together, and the graphite rod is exposed on the outer conductive surface of the terminal body; The terminal body includes a base plate and a column perpendicular to the base plate; a welding surface is formed on the top boss of the column; a sealing ring is convexly provided on the inner side surface of the base plate; an insulating first sealing ring is sleeved on the column; a sealing groove at the bottom of the first sealing ring is embedded in the sealing ring; the bottom of the first sealing ring has a flange, which is flush with the side of the base plate.
2. A battery conductive terminal according to claim 1, characterized in that: The welding surface is provided with a rough surface or a welding groove.
3. A battery conductive terminal according to claim 1, characterized in that: The boss is sleeved with non-flammable insulating adhesive, and the adhesive can adhere to the bottom of the battery cell inside the battery.
4. A battery conductive terminal according to claim 1, characterized in that: The sealing ring is 0.5-1.5 mm away from the side edge of the bottom plate, and the sealing ring is 1-2 mm away from the side of the column.
5. A battery conductive terminal according to claim 1, characterized in that: A limiting portion is convexly provided on the side surface of the column, and the limiting portion presses the top of the first sealing ring.
6. A battery conductive terminal according to claim 1, characterized in that: The terminal body is a component formed by die-casting of aluminum alloy, copper alloy or stainless steel.
7. A battery, characterized in that: A battery conductive terminal, a shell, an end cover, and a battery cell according to any one of claims 1 to 6; the battery conductive terminal blocks the lower opening of the shell, and the end cover blocks the lower opening of the shell; the battery cell is arranged inside the shell, the first pole ear of the battery cell is welded to the welding surface, and the second pole ear of the battery cell is welded to the end cover.
8. A battery according to claim 7, characterized in that: The end cover includes an insulating plastic shell, a top cover, an insulating ring, an explosion-proof disk, and a bottom cover; the insulating ring is sleeved on the second boss on the explosion-proof disk; a thinning groove is pressed on the explosion-proof disk; the edge of the explosion-proof disk is bent and embedded in the edge of the bottom cover, and the inner wall of the plastic shell is provided with a first limiting protrusion, a second limiting protrusion, and a third limiting protrusion from top to bottom; the top cover, the insulating ring, the explosion-proof disk, and the bottom cover are pressed into the plastic shell; the first limiting protrusion presses the edge of the top cover; the second limiting protrusion presses the explosion-proof disk; the third limiting protrusion supports the bent edge of the explosion-proof disk.
9. A battery according to claim 8, characterized in that: The plastic shell is sleeved on the upper part of the outer shell, and the plastic shell and the outer shell are engaged with each other.