CN104393227A - Secondary battery - Google Patents
Secondary battery Download PDFInfo
- Publication number
- CN104393227A CN104393227A CN201410747697.9A CN201410747697A CN104393227A CN 104393227 A CN104393227 A CN 104393227A CN 201410747697 A CN201410747697 A CN 201410747697A CN 104393227 A CN104393227 A CN 104393227A
- Authority
- CN
- China
- Prior art keywords
- battery
- thermistor
- battery cover
- cover board
- positive terminal
- Prior art date
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
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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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention discloses a secondary battery. The secondary battery disclosed by the invention comprises a battery cover plate, a casing, and a battery cell in the casing, wherein the battery cover plate is provided with a liquid filling hole, a safety release valve, a resistor accommodating groove, a positive terminal and a negative terminal, wherein the thermistor is fixed in the resistor accommodating groove, and the battery cover plate is connected with the battery positive terminal through the thermistor. The invention provides the secondary battery; through the thermistor part between the positive terminal of the battery and the battery cover plate, the battery casing of the lithium ion power battery can be protected against electrochemical corrosion, and the occurrence of safety accidents due to a short circuit between the negative terminal and the battery casing can be avoided, so that the market application prospect of the products of battery manufacturers can be favorably improved, and great significance in production practice is achieved.
Description
Technical field
The present invention relates to a kind of secondary cell, particularly relate to a kind of lithium rechargeable battery of metal shell.
Background technology
Along with the development of modern society and the enhancing of people's environmental consciousness, increasing equipment choice is using chargeable secondary cell as power supply, as mobile phone, notebook computer, electric tool and electric automobile etc., this is that the application & development of chargeable secondary cell provides wide space.
The preferred aluminum metal of lithium-ion-power cell manufacturing enterprise is as secondary cell housing, but at inside battery, electrolyte directly contacts with metal-back, the inefficacy that original passivating film corrodes housing and then causes battery can be destroyed under certain conditions, the topmost reason that corrosion reaction occurs is that lithium ion and aluminum metal there occurs insertion reaction, then causes the inefficacy of battery.
The technical scheme adopted to overcome the problems referred to above at present comprises: 1. pair housing carries out surface oxidation treatment and makes housing generate oxide-film and then realize the insulating properties of housing, but oxidation technology is complicated, cost is high and in battery manufacture assembling process oxide-film easily by hard object local failure.2. pair housing carries out insulator-coating process, but coating thickness, uniformity are difficult to control and insulating material to soak for a long time in electrolyte and easily produces aging thus peel off with housing.3. battery positive terminal is directly connected with battery cover board, carry out the voltage difference of balancing battery both positive and negative polarity and housing, prevent battery container and battery core internal material generation electrochemical reaction, but owing to making battery container with polarity, the risk causing negative terminal and battery case to be short-circuited increases, and is also unfavorable for the series/parallel combination assembling of battery simultaneously.
Summary of the invention
In view of this, the object of the invention is to the deficiency overcoming above-mentioned technology, and provide one that battery container can be avoided to corrode, the secondary cell simultaneously avoiding again negative terminal and battery container to be short-circuited.
The present invention for achieving the above object, by the following technical solutions: comprise battery cover board, battery core in housing and housing, described battery cover board is provided with liquid injection hole, safety valve, resistance holding tank and positive terminal and negative terminal, described battery positive terminal and negative terminal to be insulated with battery cover board by insulation cushion and are connected, positive terminal is by having automatically restorative thermistor (high molecular polymer positive-temperature-coefficient device PTC, PPTC) be connected with battery cover board, realize the voltage difference of balancing battery both positive and negative polarity and metal shell, prevent battery container generation electrochemical corrosion.When negative terminal and battery container are short-circuited, when temperature reaches the temperature limit value that thermistor presets, thermistor and positive terminal disconnect battery container are switched to neutrality, negative terminal and battery container short circuit is avoided to occur security incident, thermistor can recover the conducting that continues to realize positive terminal and housing automatically upon a drop in temperature, prevents battery container generation electrochemical corrosion.
From above technical scheme provided by the invention, compared with prior art, the invention provides a kind of secondary cell, it is by being arranged on the thermosensitive resistor parts between battery positive terminal and battery cover board, lithium-ion-power cell can be prevented to send out battery container generation electrochemical corrosion, avoid negative terminal and battery container short circuit to occur security incident simultaneously, be conducive to the market application foreground improving cell production companies product, be of great practical significance.
Accompanying drawing explanation
Fig. 1 is the thermistor structure schematic diagram of a kind of secondary cell provided by the invention;
Fig. 2 is point combination structural representation of a kind of secondary cell provided by the invention;
Fig. 3 is that the combining structure of a kind of secondary cell provided by the invention completes schematic diagram;
In figure: 1, thermistor, 1a, resistance and battery cover board link, 1b, resistance and battery positive terminal link neck, 1c resistance and battery positive terminal link, 2, battery cover board body, 3, battery case body, 4, positive terminal, 5, negative terminal, 6, insulation cushion, 7, resistance holding tank, 8, polarity indicates-negative, 9, polarity sign-just, 10, liquid injection hole, 11, seal valve, 12, safety valve.
Embodiment
In order to make those skilled in the art person understand the present invention program better, below in conjunction with drawings and embodiments, the present invention is described in further detail.
As Figure 1-3, a kind of secondary cell, comprise the battery core in battery cover board 2, housing 3 and housing case, described battery cover board 2 is provided with liquid injection hole 10(and installs seal valve 11), safety valve 12, thermistor 1, resistance holding tank 7 and positive terminal 4 and negative terminal 5, described battery positive terminal 4 and negative terminal 5 to be insulated with battery cover board 2 by insulation cushion 6 and are connected, described battery cover board 2 is also provided with the sign 8 distinguishing polarity, 9, described thermistor 1 is fixed on 1a in resistance holding tank 7 and holds with battery cover board 2 by laser welding conducting, 1c end is by riveted joint/welding and battery positive terminal 4 conducting, 1b place carries out insulating protection process and prevents and cover plate 2 conducting, described positive terminal 4 is by having automatically restorative thermistor 1(positive temperature coefficient thermo-sensitive material PTC, high molecular polymer positive-temperature-coefficient device PPTC) to be connected and then to realize the voltage difference of positive 4 negative 5 poles of balancing battery and metal shell 3 with battery cover board 2, prevent battery container 3 from electrochemical corrosion occurring, when negative terminal 5 is short-circuited with battery container 4, when temperature reaches the temperature limit value that thermistor 1 presets, thermistor 1 disconnects with positive terminal 4 and battery container 2 is switched to neutrality, negative terminal 5 and battery container 2 short circuit is avoided to occur security incident, thermistor 1 can recover to continue to realize the conducting of positive terminal 4 and housing 2 automatically upon a drop in temperature, prevent battery container 2 from electrochemical corrosion occurring.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (6)
1. a secondary cell, comprise the battery core in battery cover board, housing and housing, it is characterized in that, described battery cover board is provided with liquid injection hole, safety valve, resistance holding tank, positive terminal and negative terminal, thermistor is fixed in resistance holding tank, and battery cover board connects battery positive terminal by thermistor.
2. a kind of secondary cell according to claim 1, is characterized in that: described battery cover board, housing are metal material.
3. a kind of secondary cell according to claim 1, is characterized in that: described battery positive terminal and negative terminal to be insulated with battery cover board by insulation cushion and be connected.
4. a kind of secondary cell according to claim 1, it is characterized in that: described thermistor one end and battery cover board are by laser welding conducting, thermistor other end end, by riveting or weld and battery positive terminal conducting, carries out insulating protection process in the middle part of thermistor.
5. a kind of secondary cell according to claim 1, is characterized in that: described thermistor is have automatically restorative high molecular polymer positive-temperature-coefficient device.
6. a kind of secondary cell according to claim 5, is characterized in that: described thermistor is positive temperature coefficient thermo-sensitive material or high molecular polymer positive-temperature-coefficient device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410747697.9A CN104393227A (en) | 2014-12-10 | 2014-12-10 | Secondary battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410747697.9A CN104393227A (en) | 2014-12-10 | 2014-12-10 | Secondary battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104393227A true CN104393227A (en) | 2015-03-04 |
Family
ID=52611095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410747697.9A Pending CN104393227A (en) | 2014-12-10 | 2014-12-10 | Secondary battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104393227A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107768588A (en) * | 2017-09-27 | 2018-03-06 | 浙江超威创元实业有限公司 | One kind prevents soft-package battery internal corrosion method and extreme ear structure |
| CN109411838A (en) * | 2018-11-02 | 2019-03-01 | 蒋永兴 | A kind of safety battery with self-recovery fuse overload current overheating protection |
| CN110476269A (en) * | 2017-11-03 | 2019-11-19 | 株式会社Lg化学 | Cap assemblies and battery module including the cap assemblies |
| CN113054330A (en) * | 2019-12-26 | 2021-06-29 | 比亚迪股份有限公司 | Battery module and power battery pack and electric automobile with same |
| CN113745769A (en) * | 2021-08-19 | 2021-12-03 | 新余赣锋电子有限公司 | Battery of high security |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200976370Y (en) * | 2006-11-02 | 2007-11-14 | 哈尔滨光宇电源股份有限公司 | Lithium ion secondary battery with external protecting equipment |
| CN201294240Y (en) * | 2008-07-15 | 2009-08-19 | 成都建中锂电池有限公司 | Lithium battery with safety device |
| CN201994346U (en) * | 2010-12-10 | 2011-09-28 | 东莞新能源科技有限公司 | Power battery metal housing |
| CN203038986U (en) * | 2012-11-30 | 2013-07-03 | 宁德新能源科技有限公司 | Safe top cover of power cell |
-
2014
- 2014-12-10 CN CN201410747697.9A patent/CN104393227A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200976370Y (en) * | 2006-11-02 | 2007-11-14 | 哈尔滨光宇电源股份有限公司 | Lithium ion secondary battery with external protecting equipment |
| CN201294240Y (en) * | 2008-07-15 | 2009-08-19 | 成都建中锂电池有限公司 | Lithium battery with safety device |
| CN201994346U (en) * | 2010-12-10 | 2011-09-28 | 东莞新能源科技有限公司 | Power battery metal housing |
| CN203038986U (en) * | 2012-11-30 | 2013-07-03 | 宁德新能源科技有限公司 | Safe top cover of power cell |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107768588A (en) * | 2017-09-27 | 2018-03-06 | 浙江超威创元实业有限公司 | One kind prevents soft-package battery internal corrosion method and extreme ear structure |
| CN110476269A (en) * | 2017-11-03 | 2019-11-19 | 株式会社Lg化学 | Cap assemblies and battery module including the cap assemblies |
| EP3591733A4 (en) * | 2017-11-03 | 2020-05-06 | LG Chem, Ltd. | Cover assembly and battery module comprising same |
| US11205818B2 (en) | 2017-11-03 | 2021-12-21 | Lg Chem, Ltd. | Cover assembly and battery module including the same |
| CN110476269B (en) * | 2017-11-03 | 2022-09-06 | 株式会社Lg新能源 | Cap assembly for accommodating a plurality of secondary battery cells and battery module including the same |
| CN109411838A (en) * | 2018-11-02 | 2019-03-01 | 蒋永兴 | A kind of safety battery with self-recovery fuse overload current overheating protection |
| CN113054330A (en) * | 2019-12-26 | 2021-06-29 | 比亚迪股份有限公司 | Battery module and power battery pack and electric automobile with same |
| CN113745769A (en) * | 2021-08-19 | 2021-12-03 | 新余赣锋电子有限公司 | Battery of high security |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150304 |