CN203039012U - Safety device preventing overcharge - Google Patents
Safety device preventing overcharge Download PDFInfo
- Publication number
- CN203039012U CN203039012U CN2012206435874U CN201220643587U CN203039012U CN 203039012 U CN203039012 U CN 203039012U CN 2012206435874 U CN2012206435874 U CN 2012206435874U CN 201220643587 U CN201220643587 U CN 201220643587U CN 203039012 U CN203039012 U CN 203039012U
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- CN
- China
- Prior art keywords
- sheet
- safety device
- piezoelectric ceramic
- battery
- top cover
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- 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
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- Connection Of Batteries Or Terminals (AREA)
Abstract
The utility model discloses a safety device preventing overcharge, which comprises a top cover sheet, and a cathode pillar, an anode pillar and a liquid filling hole that are arranged on and formed in the top cover sheet, wherein the cathode pillar and the anode pillar are electrically connected with the top cover sheet; the cathode pillar is connected with a first conducting sheet; the top cover sheet is connected with a second conducting sheet in a welding manner; the second conducting sheet is placed above the first conducting sheet; and the top cover sheet is provided with piezoelectric ceramic. The safety device utilizes an external circuit to protect a cell from the overcharge, is free from an influence of the sealability of the cell, is safe, reliable, simple and easy, and can be recycled and used repeatedly.
Description
Technical field
The utility model relates to the lithium-ion electric pool technology, particularly a kind of safety device of overcharging of preventing.
Background technology
In the prior art, lithium ion battery is since succeeding in developing, because its work high power capacity, high-output power, temperature limit is wide, self-discharge rate is low, have extended cycle life, safety, environmental protection, special advantages such as pollution-free, in electronic equipment, obtain application more and more widely in recent years, and become the standard configuration of electronic equipments such as mobile phone.
But lithium ion battery is under the situation of improper use in recent years, puts as heating, overcharge, crossing, short circuit, vibration, extruding etc. can occur catching fire, exploding and even cause event such as injury to personnel.So the fail safe of lithium ion battery causes people's extensive concern.
At present, the main battery case internal gas pressure that adopts starts protective circuit in the power lithium battery, avoid overcharging, but if in the process of overcharging, battery case gas leakage just can't start protective circuit, and still there is security risk in electric core.
The utility model content
In order to address the above problem, the purpose of this utility model is, a kind of safety device of overcharging of preventing is provided, and utilized external circuit to protect battery to avoid overcharging, and not influenced by battery sealing-performance, and is safe and reliable, simple, capable of circulationly repeatedly uses.
To achieve these goals, the technical solution of the utility model is, a kind of safety device of overcharging of preventing, comprise coping plate and the negative terminal, positive terminal and the liquid injection hole that are arranged on the coping plate, negative terminal and positive terminal are electrically connected with coping plate respectively, and negative terminal links to each other with first conducting strip, and coping plate links to each other with second conducting strip by welding manner, and second conducting strip places first conducting strip top, and coping plate is provided with piezoelectric ceramic.When over-charging of battery, the voltage at piezoelectric ceramic two ends increases, and piezoelectric ceramic can stretch, and first conducting strip that contacts with piezoelectric ceramic can contact with second conducting strip, forms the outer weak point of battery, thus the protection battery.
As further improvement of the utility model, piezoelectric ceramic places between first conducting strip and the coping plate.When over-charging of battery, the voltage at piezoelectric ceramic two ends increases, and piezoelectric ceramic can stretch, and piezoelectric ceramic promotes first conducting strip and contacts with second conducting strip, makes battery short outward, avoids over-charging of battery.
As further improvement of the utility model, coping plate communicates with positive terminal, makes coping plate become the part of power-on circuit.
As further improvement of the utility model, the connected mode of piezoelectric ceramic and coping plate is welding or bonding.Piezoelectric ceramic and coping plate guarantee the piezoelectric ceramic conducting for closely to be connected, and make it that inverse piezoelectric effect of piezoelectric ceramic take place, and start protective circuit.
As further improvement of the utility model, piezoelectric ceramic is the lead titanate piezoelectric ceramics member.The electromechanical coupling coefficient height of lead zirconate titanate ceramic is the piezoelectric ceramic of better performances, can well carry out inverse piezoelectric effect.
The beneficial effects of the utility model are; utilize the inverse piezoelectric effect of piezoelectric ceramic, when the voltage at piezoelectric ceramic two ends increased, piezoelectric ceramic can stretch; be stretched over to a certain degree; first conducting strip that contacts with piezoelectric ceramic can contact with second conducting strip, forms the outer weak point of battery, and the protection battery is avoided overcharging; not influenced by battery sealing-performance; safe and reliable, simple, repeatedly use capable of circulation.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is A-A enlarged drawing of the present utility model.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage are more clear, in conjunction with the following drawings, it are further described, with reference to Fig. 1 and Fig. 2.
A kind of safety device of overcharging of preventing, comprise coping plate 2 and the negative terminal 1, positive terminal 3 and the liquid injection hole 4 that are arranged on the coping plate 2, negative terminal 1 and positive terminal 3 are electrically connected with coping plate 2 respectively, negative terminal 1 links to each other with first conducting strip 11, coping plate 2 links to each other with second conducting strip 12 by welding manner, and second conducting strip 12 places first conducting strip, 11 tops, and coping plate 2 is provided with piezoelectric ceramic 13.When over-charging of battery, the voltage at piezoelectric ceramic 13 two ends increases, and piezoelectric ceramic 13 can stretch, and connecing 13 first conducting strips 11 that touch with piezoelectric ceramic can contact with second conducting strip 12, forms the outer weak point of battery, thus the protection battery.
Piezoelectric ceramic 13 places between first conducting strip 11 and the coping plate 2.When over-charging of battery, the voltage at piezoelectric ceramic 13 two ends increases, and piezoelectric ceramic 13 can stretch, and piezoelectric ceramic 13 promotes first conducting strip 11 and contacts with second conducting strip 12, makes battery short outward, avoids over-charging of battery.
Coping plate 2 communicates with positive terminal 3, makes coping plate 2 become the part of power-on circuit.
Piezoelectric ceramic 13 is welding or bonding with the connected mode of coping plate 2.Piezoelectric ceramic 13 and coping plate 2 guarantee piezoelectric ceramic 13 conductings for closely to be connected, and make it that inverse piezoelectric effect of piezoelectric ceramic 13 take place, and start protective circuit.
As over-charging of battery (if battery reserve of electricity 4.5V; more than the charging 4.5V) time; piezoelectric ceramic 13(is as adopting lead titanate piezoelectric ceramics) when the voltage at two ends increases; the inverse piezoelectric effect of piezoelectric ceramic 13 takes place, and piezoelectric ceramic 13 can stretch, and is stretched over to a certain degree; piezoelectric ceramic 13 promotes first conducting strip 11 and contacts with second conducting strip 12; make battery short outward, avoid over-charging of battery, thus the protection battery.
The announcement of book according to the above description, the utility model those skilled in the art can also carry out suitable change and modification to above-mentioned execution mode.Therefore, the embodiment that discloses and describe above the utility model is not limited to also should fall in the protection range of claim of the present utility model modifications and changes more of the present utility model.In addition, although used some specific terms in this specification, these terms do not become any restriction to the utility model patent just for convenience of description.
Claims (5)
1. safety device that prevents from overcharging, comprise pushing up to cover sheet ﹙ 2 ﹚ and be arranged on described top and cover negative pole post ﹙ 1 ﹚, positive pole ﹙ 3 ﹚ on sheet ﹙ 2 ﹚ and annotate liquid hole ﹙ 4 ﹚, described negative pole post ﹙ 1 ﹚ and described positive pole ﹙ 3 ﹚ are electrically connected with described top lid sheet ﹙ 2 ﹚ respectively, it is characterized in that: described negative pole post ﹙ 1 ﹚ and the one leads electric sheet ﹙ 11 ﹚ and links to each other, described top lid sheet ﹙ 2 ﹚ lead electric sheet ﹙ 12 ﹚ by welding manner and the 2nd and link to each other, and the 2nd leads electric sheet ﹙ 12 ﹚ places the one to lead electric sheet ﹙ 11 ﹚ top, and the top is covered sheet ﹙ 2 ﹚ and is provided with electric pottery porcelain ﹙ 13 ﹚ of pressure.
2. the safety device that overcharges of preventing according to claim 1 is characterized in that, the electric pottery porcelain of described pressure ﹙ 13 ﹚ place the one to lead electric sheet ﹙ 11 ﹚ and the top is covered between sheet ﹙ 2 ﹚.
3. the safety device that overcharges of preventing according to claim 1 is characterized in that, described top lid sheet ﹙ 2 ﹚ communicate with described positive pole ﹙ 3 ﹚.
4. the safety device that overcharges of preventing according to claim 2 is characterized in that, the connected mode of described Ya Dian Tao Ci ﹙ 13 ﹚ and described coping plate (2) is welding or bonding.
5. the safety device that overcharges of preventing according to claim 1 is characterized in that described Ya Dian Tao Ci ﹙ 13 ﹚ are the lead titanate piezoelectric ceramics member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012206435874U CN203039012U (en) | 2012-11-29 | 2012-11-29 | Safety device preventing overcharge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012206435874U CN203039012U (en) | 2012-11-29 | 2012-11-29 | Safety device preventing overcharge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203039012U true CN203039012U (en) | 2013-07-03 |
Family
ID=48691103
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012206435874U Expired - Lifetime CN203039012U (en) | 2012-11-29 | 2012-11-29 | Safety device preventing overcharge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203039012U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104752680A (en) * | 2013-12-30 | 2015-07-01 | 现代自动车株式会社 | Battery overcharge protection device |
| CN117855641A (en) * | 2024-03-05 | 2024-04-09 | 厦门海辰储能科技股份有限公司 | Energy storage device and electric equipment |
-
2012
- 2012-11-29 CN CN2012206435874U patent/CN203039012U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104752680A (en) * | 2013-12-30 | 2015-07-01 | 现代自动车株式会社 | Battery overcharge protection device |
| CN104752680B (en) * | 2013-12-30 | 2019-03-26 | 现代自动车株式会社 | Over-charging of battery electrical protective device |
| CN117855641A (en) * | 2024-03-05 | 2024-04-09 | 厦门海辰储能科技股份有限公司 | Energy storage device and electric equipment |
| CN117855641B (en) * | 2024-03-05 | 2024-05-28 | 厦门海辰储能科技股份有限公司 | Energy storage device and electric equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 352100 Jiaocheng District of Ningde City, Fujian Province Zhang Wan Zhen Xingang Road No. 1 Patentee after: Contemporary Amperex Technology Co.,Ltd. Address before: 1, 1F-, west of Fujian Road, Xingang Road, Zhangzhou Town, Jiaocheng District, Ningde, 352000 Patentee before: CONTEMPORARY AMPEREX TECHNOLOGY Ltd. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130703 |