CN217903260U - Battery with explosion-proof valve protection and top cap subassembly thereof - Google Patents
Battery with explosion-proof valve protection and top cap subassembly thereof Download PDFInfo
- Publication number
- CN217903260U CN217903260U CN202221651629.9U CN202221651629U CN217903260U CN 217903260 U CN217903260 U CN 217903260U CN 202221651629 U CN202221651629 U CN 202221651629U CN 217903260 U CN217903260 U CN 217903260U
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- Prior art keywords
- explosion
- proof valve
- battery
- top cap
- top cover
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- 230000001681 protective effect Effects 0.000 claims abstract description 14
- 239000007788 liquid Substances 0.000 claims description 19
- 238000002347 injection Methods 0.000 claims description 15
- 239000007924 injection Substances 0.000 claims description 15
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 239000003792 electrolyte Substances 0.000 abstract description 31
- 229910052744 lithium Inorganic materials 0.000 description 8
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 239000010405 anode material Substances 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000009993 protective function Effects 0.000 description 2
- 229910000733 Li alloy Inorganic materials 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- QHGJSLXSVXVKHZ-UHFFFAOYSA-N dilithium;dioxido(dioxo)manganese Chemical compound [Li+].[Li+].[O-][Mn]([O-])(=O)=O QHGJSLXSVXVKHZ-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000001989 lithium alloy Substances 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 1
- 229910003002 lithium salt Inorganic materials 0.000 description 1
- 159000000002 lithium salts Chemical class 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 239000011255 nonaqueous electrolyte Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Gas Exhaust Devices For Batteries (AREA)
Abstract
The utility model provides a battery top cap subassembly with explosion-proof valve protection, including top cap piece, explosion-proof valve and protection film, be equipped with the opening on the top cap piece, the explosion-proof valve is established the corresponding open-ended position on the top cap piece, and the protection film covers at the exposed position of explosion-proof valve, and the protection film includes flaky basal portion and establishes the bellying that is used for blockking the foreign matter entering explosion-proof valve in the basal portion outside, is equipped with the bleeder vent that runs through along the thickness direction on the basal portion, and the bellying is established at the bleeder vent periphery. The battery comprises a shell and the battery top cover assembly arranged on the shell. In the battery with the explosion-proof valve protection and the top cover assembly thereof, as the bulge part of the protective film is higher than the air holes, when electrolyte is injected into the battery, if the electrolyte overflows, the electrolyte can be blocked by the bulge part, cannot flow into the explosion-proof valve and can only flow to other low positions; besides the electrolyte, the bulge can also prevent other foreign matters from entering the explosion-proof valve, so that the explosion-proof valve is protected, and the failure of the explosion-proof valve is prevented.
Description
Technical Field
The utility model belongs to the technical field of the battery and specifically relates to a battery and top cap subassembly with explosion-proof valve protection is related to.
Background
Lithium batteries are batteries using a nonaqueous electrolyte solution, with lithium metal or a lithium alloy as an anode material. When the lithium battery works, lithium ions participate in oxidation-reduction reaction to convert chemical energy into electric energy. The evaluation indexes of the lithium battery product comprise energy density, cycle life, rate capability (discharge performance under different currents), safety performance, applicable temperature and the like. The difference of different anode materials is obvious, and the application fields are different. Common positive electrode materials can be classified into Lithium Cobaltate (LCO), lithium Manganate (LMO), and lithium iron phosphate (LFP). The electrolyte is mainly used as a carrier for ion migration in the lithium battery, and the transmission of ions between the positive electrode and the negative electrode is ensured. It has certain influence on the performance indexes of battery safety, cycle life, charge and discharge rate, high and low temperature performance, energy density and the like. The electrolyte is generally prepared from high-purity organic solvent, electrolyte lithium salt, additive and other raw materials according to a certain proportion.
The lithium battery is usually provided with a liquid injection hole and an explosion-proof valve, the liquid injection hole injects electrolyte into the battery in the production process of the battery, and the explosion-proof valve is used for preventing the battery from exploding.
In the production process of the lithium battery, when the liquid of electrolyte is injected into the battery, the electrolyte overflows, so that the electrolyte easily flows into the explosion-proof valve, the cleaning is not easy, and the electrolyte residue easily causes the failure of the explosion-proof valve.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in, to the above-mentioned defect in the correlation technique, provide a battery and top cap subassembly with explosion-proof valve protection.
The utility model provides a technical scheme that its technical problem adopted includes: the utility model provides a battery top cap subassembly with explosion-proof valve protection, includes top cap piece, explosion-proof valve and protection film, be equipped with the opening on the top cap piece, the explosion-proof valve is established correspond on the top cap piece open-ended position, and pass through the opening outwards exposes, the protection film covers the exposed position of explosion-proof valve, the protection film includes flaky basal portion and establishes being used for in the basal portion outside blocks the foreign matter and gets into the bellying of explosion-proof valve, be equipped with the bleeder vent that runs through along the thickness direction on the basal portion, the bellying is established the bleeder vent is peripheral.
Preferably, the protrusion is formed in a ring shape around the outer periphery of the airing hole.
Preferably, the base profile matches the opening shape.
Preferably, the airing hole is formed in the center of the base.
Preferably, the inner wall of the boss is flush with the vent edge.
Preferably, the explosion-proof valve is arranged on the lower side of the top cover plate, the protective film covers the upper side of the explosion-proof valve, and the bulge part bulges upwards.
Preferably, the explosion-proof valve is welded to the top cover sheet.
Preferably, the battery top cover assembly comprises a positive electrode and a negative electrode which are connected with the top cover plate, and the explosion-proof valve is arranged between the positive electrode and the negative electrode.
Preferably, the top cover plate is provided with a liquid injection hole for injecting liquid into the battery, and the liquid injection hole is formed between the positive electrode and the negative electrode.
The utility model provides a technical scheme that its technical problem adopted includes: a battery is provided, which comprises a shell and the battery top cover component arranged on the shell.
Implement the technical scheme of the utility model, following beneficial effect has at least: in the battery with the explosion-proof valve protection and the top cover assembly thereof, because the bulge part of the protection film is higher than the air vent, when electrolyte is injected into the battery, if the electrolyte overflows, the electrolyte can be blocked by the bulge part, cannot flow into the explosion-proof valve and only can flow to other low-level positions; except for electrolyte, the bulge can also block other foreign matters from entering the explosion-proof valve, so that the explosion-proof valve is protected, and the failure of the explosion-proof valve is prevented.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
Fig. 1 is a perspective view of a battery top cap assembly with explosion proof valve protection according to an embodiment of the present invention.
Fig. 2 is an exploded view of the battery top cap assembly of fig. 1.
Fig. 3 is a perspective view of a protective film of the battery top cap assembly of fig. 1.
Fig. 4 is a top view of a protective film of the battery top cap assembly of fig. 1.
Fig. 5 isbase:Sub>A sectional view taken atbase:Sub>A positionbase:Sub>A-base:Sub>A in fig. 4.
Fig. 6 is a front view of a battery according to an embodiment of the present invention.
The reference numerals in the figures denote: the top cover plate 1, the opening 11, the explosion-proof valve 2, the protective film 3, the base part 31, the bulge part 32, the air hole 33, the positive electrode 41, the negative electrode 42, the liquid injection hole 5 and the shell 6.
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood that if the terms "top," "bottom," or the like, are used herein to describe various elements, components, regions, layers, etc., these elements, regions, layers, etc. are not intended to limit the present invention, but are merely used for convenience in describing the present invention. It is also to be understood that, unless otherwise expressly stated or limited, the terms "connected," "disposed," and the like are used broadly and encompass, for example, fixed connections, removable connections, or integral connections; either directly or indirectly through intervening media, either internally or in any other relationship. When an element is referred to as being "on" or "under" another element, it can be "directly" or "indirectly" on the other element or intervening elements may also be present. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the following description, for purposes of explanation and not limitation, specific details are set forth such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
Referring to fig. 1-5, the battery top cap assembly with explosion-proof valve protection in one embodiment of the present invention includes a top cap 1, an explosion-proof valve 2 and a protection film 3, wherein the top cap 1 is provided with an opening 11 penetrating along a thickness direction, the explosion-proof valve 2 is disposed on the top cap 1 at a position corresponding to the opening 11 and exposed outwards through the opening 11, the protection film 3 covers a portion where the explosion-proof valve 2 is exposed, the protection film 3 includes a sheet-shaped base portion 31 and a protruding portion 32 disposed outside the base portion 31 and used for blocking foreign matters from entering the explosion-proof valve 2, the base portion 31 is provided with a vent hole 33 penetrating along the thickness direction and used for allowing the explosion-proof valve 2 to ventilate; the convex part 32 is arranged at the periphery of the air hole 33.
According to the battery top cover assembly with the explosion-proof valve protection function, as the bulge part 32 of the protection film 3 is higher than the air vent 33, when electrolyte is injected into a battery, if the electrolyte overflows, the electrolyte is blocked by the bulge part 32, cannot flow into the explosion-proof valve 2, and only can flow to other low positions; besides the electrolyte, the bulge 32 can also block other foreign matters from entering the explosion-proof valve 2, so that the explosion-proof valve 2 is protected, and the failure of the explosion-proof valve 2 is prevented.
Wherein, explosion-proof valve 2 can include nick or rupture disk, and nick or rupture disk desolder, fracture when the battery heats up the inside gas expansion of battery, pressure increase to a certain extent, gassing pressure release to avoid the battery explosion.
Preferably, the boss 32 is ring-shaped around the periphery of the outer air-permeable hole 33. The base 31 of the protective film 3 is contoured to match the shape of the opening 11 of the top coversheet 1. The airing hole 33 of the protective film 3 is provided at the center of the base 31 to facilitate the production. The inner wall of the convex part 32 is flush with the edge of the vent hole 33, so that the production is convenient.
Preferably, the explosion-proof valve 2 is provided at the lower side of the top cover sheet 1, the protection film 3 covers the upper side of the explosion-proof valve 2, and the projection 32 is upwardly projected.
The explosion-proof valve 2 may be welded to the top cover plate 1.
Preferably, the battery top cover assembly comprises a positive electrode 41 and a negative electrode 42 connected with the top cover sheet 1, and the explosion-proof valve 2 is arranged between the positive electrode 41 and the negative electrode 42. The top cover plate 1 is provided with a liquid injection hole 5 for injecting liquid into the battery, and the liquid injection hole 5 is arranged between the positive electrode 41 and the negative electrode 42 and beside the explosion-proof valve 2. Since the explosion-proof valve 2 and the liquid injection hole 5 are provided between the positive electrode 41 and the negative electrode 42, the electrolyte overflowing during liquid injection flows into the explosion-proof valve 2 more easily, and the protective function of the protective film 3 against the explosion-proof valve 2 becomes more important.
In summary, in the battery top cover assembly protected by the explosion-proof valve 2, since the protrusion 32 of the protective film 3 is higher than the air hole 33, when electrolyte is injected into the battery, if the electrolyte overflows, the electrolyte is blocked by the protrusion 32 and is not easy to flow into the explosion-proof valve 2; besides the electrolyte, the bulge 32 can also block other foreign matters from entering the explosion-proof valve 2, so that the explosion-proof valve 2 is protected, and the failure of the explosion-proof valve 2 is prevented. When the explosion-proof valve 2 and the liquid injection hole 5 are both provided between the positive electrode 41 and the negative electrode 42, the electrolyte overflowing at the time of liquid injection flows more easily into the explosion-proof valve 2, so that the protective action of the protective film 3 against the explosion-proof valve 2 becomes more important.
Referring to fig. 6, a battery according to an embodiment of the present invention includes a housing 6 and the above-mentioned battery top cover assembly with explosion-proof valve protection disposed on the housing 6. In the battery, because the bulge part 32 of the protective film 3 is higher than the air vent 33, when electrolyte is injected into the battery, if the electrolyte overflows, the electrolyte is blocked by the bulge part 32, cannot flow into the explosion-proof valve 2 and only can flow to other positions at a low position; besides the electrolyte, the bulge 32 can also block other foreign matters from entering the explosion-proof valve 2, so that the explosion-proof valve 2 is protected, and the failure of the explosion-proof valve 2 is prevented. When the explosion-proof valve 2 and the liquid injection hole 5 are both provided between the positive electrode 41 and the negative electrode 42, the electrolyte overflowing at the time of liquid injection flows more easily into the explosion-proof valve 2, so that the protective function of the protective film 3 against the explosion-proof valve 2 becomes more important.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications, combinations, and variations may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (10)
1. The utility model provides a battery top cap subassembly with explosion-proof valve protection, its characterized in that, includes top cover plate (1), explosion-proof valve (2) and protection film (3), be equipped with opening (11) on top cover plate (1), establish explosion-proof valve (2) correspondence on top cover plate (1) the position of opening (11), and pass through opening (11) outwards expose, protection film (3) cover explosion-proof valve (2) exposed position, protection film (3) include flaky basic part (31) and establish being used for in the basic part (31) outside blocks the foreign matter and gets into protruding portion (32) of explosion-proof valve (2), be equipped with on basic part (31) along bleeder vent (33) that thickness direction runs through, establish protruding portion (32) bleeder vent (33) are peripheral.
2. The battery top cap assembly according to claim 1, wherein the protrusion (32) has a ring shape surrounding the outer periphery of the vent hole (33).
3. The battery top cap assembly of claim 1, wherein the base (31) has a profile that matches the shape of the opening (11).
4. The battery top cap assembly of claim 1, wherein the vent (33) is centrally located in the base (31).
5. The battery top cap assembly of claim 1, wherein the inner wall of the protrusion (32) is flush with the edge of the vent (33).
6. The battery top cover assembly according to claim 1, wherein the explosion-proof valve (2) is arranged at the lower side of the top cover sheet (1), the protective film (3) covers the upper side of the explosion-proof valve (2), and the convex part (32) is convex upwards.
7. The battery top cap assembly of claim 1, wherein the explosion-proof valve (2) is welded to the top cap sheet (1).
8. The battery top cap assembly of claim 1, comprising a positive electrode (41) and a negative electrode (42) connecting the top cap sheet (1), the explosion-proof valve (2) being disposed between the positive electrode (41) and the negative electrode (42).
9. The battery top cover assembly according to claim 8, wherein the top cover sheet (1) is provided with a liquid injection hole (5) for injecting liquid into the battery, and the liquid injection hole (5) is arranged between the positive electrode (41) and the negative electrode (42).
10. A battery comprising a housing (6) and a battery cap assembly according to any one of claims 1-9 disposed on said housing (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221651629.9U CN217903260U (en) | 2022-06-29 | 2022-06-29 | Battery with explosion-proof valve protection and top cap subassembly thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221651629.9U CN217903260U (en) | 2022-06-29 | 2022-06-29 | Battery with explosion-proof valve protection and top cap subassembly thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217903260U true CN217903260U (en) | 2022-11-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221651629.9U Active CN217903260U (en) | 2022-06-29 | 2022-06-29 | Battery with explosion-proof valve protection and top cap subassembly thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217903260U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023142648A1 (en) * | 2022-01-27 | 2023-08-03 | 宁德时代新能源科技股份有限公司 | Explosion-proof valve patch for battery, end cover assembly, battery, and electric device |
-
2022
- 2022-06-29 CN CN202221651629.9U patent/CN217903260U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023142648A1 (en) * | 2022-01-27 | 2023-08-03 | 宁德时代新能源科技股份有限公司 | Explosion-proof valve patch for battery, end cover assembly, battery, and electric device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: Building 9, A4, No. 58 Jingxing East Road, Nantong Development Zone, Nantong City, Jiangsu Province, 226000 Patentee after: Nantong Tuobang Lithium Battery Co.,Ltd. Country or region after: China Patentee after: SHENZHEN TOPBAND BATTERY Co.,Ltd. Address before: No. 69, Central Road, Development Zone, Nantong City, Jiangsu Province, 226000 Patentee before: Nantong Tuobang Youneng Technology Co.,Ltd. Country or region before: China Patentee before: SHENZHEN TOPBAND BATTERY Co.,Ltd. |
|
| CP03 | Change of name, title or address |