CN205810884U - Safety anti-overcharging cover plate of ternary lithium battery - Google Patents
Safety anti-overcharging cover plate of ternary lithium battery Download PDFInfo
- Publication number
- CN205810884U CN205810884U CN201620641379.9U CN201620641379U CN205810884U CN 205810884 U CN205810884 U CN 205810884U CN 201620641379 U CN201620641379 U CN 201620641379U CN 205810884 U CN205810884 U CN 205810884U
- Authority
- CN
- China
- Prior art keywords
- cover plate
- main body
- sensing device
- plate main
- temperature sensing
- 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.)
- Withdrawn - After Issue
Links
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 25
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 25
- 239000007788 liquid Substances 0.000 claims abstract description 19
- 239000004020 conductor Substances 0.000 claims abstract description 9
- 238000009413 insulation Methods 0.000 claims description 38
- 230000006698 induction Effects 0.000 claims description 26
- 238000007789 sealing Methods 0.000 claims description 5
- 239000012530 fluid Substances 0.000 claims description 3
- 239000000565 sealant Substances 0.000 claims description 3
- 230000036413 temperature sense Effects 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 2
- 239000012212 insulator Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 239000002000 Electrolyte additive Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
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
- Secondary Cells (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The utility model provides a safety overcharge-proof cover plate of a ternary lithium battery, which comprises a cover plate main body, a bottom insulating plate, and a positive pole column and a negative pole column which are respectively and fixedly arranged on the upper end surface of the cover plate main body, wherein the positive pole column is communicated with the cover plate main body, and an insulating pad is arranged between the negative pole column and the cover plate main body; the bottom end face of the negative pole column is connected with a temperature sensing device used for sensing the internal temperature of the lithium battery, the bottom of the temperature sensing device is provided with a liquid conductive medium, when the internal temperature of the battery is too high, the liquid conductive medium expands and rises to the top end of the battery, and the negative pole column is conducted with the cover plate main body to form an external short circuit. When the overcharge temperature of the battery rises, the liquid conductive medium expands to enable the temperature sensing device to become a conductor, so that the negative pole column is conducted with the cover plate main body to form an external short circuit, thermal runaway in the overcharge process is prevented, and the overcharge safety of the battery is ensured.
Description
Technical field
This utility model relates to technical field of lithium ion, is specifically related to the anti-overcharge lid of safety of a kind of ternary lithium battery
Plate.
Background technology
Along with the development of ternary material lithium battery, the lifting of battery energy density, single interpolation Overcharge prevention electrolyte is added
The measure of agent or simple covering plate structure can not meet the demand of ternary battery safety and cycle life.For ternary battery
Security performance test overcharges test requirements document, ternary battery structure improves and overcharges the problem of Security of test and need solution badly.
The most common lithium battery cover plate is substantially without anti-overcharge structure, and the anti-overcharge means of battery mostly are interpolation electrolysis additive, use
Overcharge prevention electrolyte additive can produce gas when over-charging of battery, makes battery ballooning occur, and affects battery in groups.With
Time Overcharge prevention electrolyte additive certain side effect is produced for the cycle performance of battery, affect the performance of electrical property.
Utility model content
In order to improve the security performance of ternary lithium battery, this utility model offer one can be internal during over-charging of battery
Form external short circuit when temperature is too high and stop the anti-overcharge cover plate of safety of thermal runaway, be greatly improved the security performance of lithium battery.
For solving above-mentioned technical problem, this utility model adopts the following technical scheme that
The anti-overcharge cover plate of safety of a kind of ternary lithium battery, including cover plate main body, bottom insulation plate and is installed in respectively
The positive terminal of cover plate main body upper surface and negative terminal, described positive terminal turns on cover plate main body, described negative terminal and cover plate main body
Between be provided with felt pad；The bottom face of negative terminal connects the temperature sensing device for sensing lithium battery interior temperature, described
The bottom of temperature sensing device is equipped with liquid conducting medium, and when internal temperature of battery is too high, liquid conducting medium expands and rises
To its top, and negative terminal is formed external short circuit with cover plate main body conducting.
Scheme further, described temperature sensing device is fastened on bottom insulation plate, and the top of temperature sensing device is run through
After cover plate main body, the bottom face with negative terminal contacts, and the bottom of temperature sensing device is run through bottom insulation plate and is positioned at lithium battery
Portion.
Scheme further, described temperature sensing device includes top cover and the induction end being made of an electrically conducting material, described top cover
And between induction end, it is fixedly connected with insulation cylinder；Described induction end, built with liquid conducting medium, is offered inside insulation cylinder
There are connection top cover and the capillary tube of induction end.
Further scheme, the two ends of described insulation cylinder are threaded connection or fluid sealant and top cover, induction end respectively
Connect, make temperature sensing device be internally formed sealing state.
Scheme further, the middle periphery of described insulation cylinder is provided with little annular boss, and the top periphery of induction end is provided with
Big annular boss, described temperature sensing device is fastened on bottom insulation plate by big annular boss and is connected with cover plate main body.
Owing to temperature sensing device is made up of three parts, the top cover being positioned at its two ends is all by conduction material with induction end
Material is made, and the insulation cylinder being positioned at centre is insulant, and same little annular boss is also made for insulant, and big
Annular boss is made of an electrically conducting material.Little annular boss between big annular boss and top cover by top cover and sensing
End separates.
Due to the setting of annular boss little, big, facilitate the connection between insulation cylinder and induction end, can be directly by close
Annular boss little, big is attached sealing by sealing.
Temperature sensing device is fastened on bottom insulation plate by big annular boss, and its top sequentially passes through cover plate master
Being connected with negative terminal after body, felt pad, bottom is positioned at lithium battery interior through bottom insulation plate, and the cover plate master of conductive material
Completely cut off by insulation cylinder between body and negative terminal.Therefore when battery charge temperature is normal, the liquid conduction being positioned at induction end is situated between
Matter is motionless, and temperature sensing device is insulator, therefore is not turned between negative terminal and cover plate main body；And when lithium battery interior temperature
Time too high, liquid conducting medium expands and rises, and rises to its top cover by the capillary tube within insulation cylinder, so that temperature
Induction installation becomes a conductor, thus is turned on cover plate main body by negative terminal, i.e. forms an external short circuit.Now charging current
It is directly over cover plate main body and forms loop, can be avoided the thermal runaway during lithium battery overcharges, thus be greatly improved electricity
Pond security performance.And when inside battery recovers normal temperature, due to liquid conducting medium shrinkage capillary in insulation cylinder
Pipe is back in the induction end bottom it, makes temperature sensing device again become insulator.
From above technical scheme, this utility model, compared with common cover, has the advantages that
(1) this utility model is on the cover board provided for sensing the temperature sensing device of lithium battery interior temperature, works as battery
When overcharging or be abnormal, make temperature sensing device conducting form external short circuit owing to producing high temperature, stop its thermal runaway, improve battery
Safety during charging.
(2) after using the anti-overcharge cover plate of safety of the present utility model, without adding anti-overcharge additive in battery, thus not
Battery key property can be affected；Battery is avoided ballooning to occur and reduces cycle performance of battery.
(3) temperature sensing device is integrated in the downside of negative terminal by this utility model, has saved space and has been easy to production and adds
Work.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model；
Fig. 2 is structure broken away view of the present utility model；
Fig. 3 is temperature sensing device scheme of installation in this utility model；
Fig. 4 is temperature sensing device operating diagram in this utility model；
Fig. 5 is the structure expanded view of temperature sensing device in this utility model.
In figure: 1-cover plate main body, 2-bottom insulation plate, 3-positive terminal, 4-negative terminal, 5-felt pad, 6-temperature sense fills
Put, 6-1 top cover, 6-2 insulation cylinder, 6-3 induction end, 6-4 liquid conducting medium, 6-5 capillary tube, the little annular boss of 6-6,6-7
Big annular boss.
Detailed description of the invention
Below in conjunction with the accompanying drawings a kind of preferred implementation of the present utility model is described in detail.
As illustrated in fig. 1 and 2, the anti-overcharge cover plate of safety of a kind of ternary lithium battery, including cover plate main body 1, bottom insulation plate 2
And it being installed in positive terminal 3 and the negative terminal 4 of cover plate main body 1 upper surface respectively, described positive terminal 3 turns on cover plate main body 1, institute
State and between negative terminal 4 and cover plate main body 1, be provided with felt pad 5；The bottom face of negative terminal 4 connects to be had for sensing lithium battery interior temperature
The temperature sensing device 6 of degree, the bottom of described temperature sensing device 6 is equipped with liquid conducting medium 6-4, when internal temperature of battery mistake
Gao Shi, liquid conducting medium 6-4 expand and rise to its top, and negative terminal 4 and cover plate main body 1 are turned on formation external short circuit.
As it is shown on figure 3, temperature sensing device 6 is fastened on bottom insulation plate 2, lid is run through on the top of temperature sensing device 6
After plate main body 1, the bottom face with negative terminal 4 contacts, and the bottom of temperature sensing device 6 is run through bottom insulation plate 2 and is positioned at lithium battery
Internal.
As it is shown in figure 5, temperature sensing device 6 includes top cover 6-1 and induction end 6-3 being made of an electrically conducting material, described top
It is fixedly connected with insulation cylinder 6-2 between lid 6-1 and induction end 6-3；Described induction end 6-3 built with liquid conducting medium 6-4,
Connection top cover 6-1 and the capillary tube 6-5 of induction end 6-3 is offered inside insulation cylinder 6-2.
Further scheme, the two ends of described insulation cylinder 6-2 are threaded connection or fluid sealant and top cover 6-1, sense respectively
6-3 should be held to connect, make temperature sensing device 6 be internally formed sealing state.
Scheme further, the middle periphery of described insulation cylinder 6-2 is provided with little annular boss 6-6, the top of induction end 6-3
Periphery is provided with big annular boss 6-7, and described temperature sensing device 6 is fastened on bottom insulation plate 2 also by big annular boss 6-7
It is connected with cover plate main body 1.
Temperature sensing device 6 is fastened on bottom insulation plate 2 by big annular boss 6-7, and its top cover 6-1 sequentially passes through
Being connected with negative terminal 4 after cover plate main body 1, felt pad 5, induction end 6-3 is positioned at lithium battery interior through bottom insulation plate 2, and
Completely cut off by insulation cylinder 6-2 between cover plate main body 1 and the negative terminal 4 of conductive material.
When battery charge temperature is normal, the liquid conducting medium 6-4 being positioned at induction end 6-3 is motionless, and temperature sense fills
Put 6 and be insulator, therefore be not turned on (as shown in Figure 3) between negative terminal 4 and cover plate main body 1；And when lithium battery interior temperature mistake
Gao Shi, liquid conducting medium 6-4 expand and rise, and rise to its top cover 6-1 by the capillary tube 6-5 within insulation cylinder 6-2,
So that temperature sensing device 6 becomes a conductor, thus negative terminal 4 is turned on cover plate main body 1, i.e. form an external short circuit
(as shown in Figure 4).Now charging current is directly over cover plate main body 1 and directly forms loop, can be avoided lithium battery and overcharged
Thermal runaway in journey, thus it is greatly improved battery safety.And when inside battery recovers normal temperature, owing to liquid is led
Electrolyte 6-4 shrinkage capillary tube 6-5 in insulation cylinder 6-2 is back in induction end 6-3 bottom it, makes temperature sense fill
Put 6 and again become insulator.
The above embodiment is only to be described preferred implementation of the present utility model, not to this practicality
Novel scope is defined, and on the premise of without departing from this utility model design spirit, those of ordinary skill in the art are to this
Various deformation that the technical scheme of utility model is made and improvement, all should fall into the guarantor that claims of the present utility model determine
In the range of protecting.
Claims (5)
1. the anti-overcharge cover plate of the safety of ternary lithium battery, including cover plate main body (1), bottom insulation plate (2) and consolidates respectively
It is located at positive terminal (3) and the negative terminal (4) of cover plate main body (1) upper surface, it is characterised in that: described positive terminal (3) and cover plate master
Body (1) turns on, and is provided with felt pad (5) between described negative terminal (4) and cover plate main body (1)；The bottom face of negative terminal (4) connects to be had
For sensing the temperature sensing device (6) of lithium battery interior temperature, the bottom of described temperature sensing device (6) is conducted electricity equipped with liquid
Medium (6-4), when internal temperature of battery is too high, liquid conducting medium (6-4) expands and rises to its top, and by negative terminal
(4) external short circuit is formed with cover plate main body (1) conducting.
The anti-overcharge battery cover board of safety the most according to claim 1, it is characterised in that: described temperature sensing device (6) blocks
Be located on bottom insulation plate (2), the top of temperature sensing device (6) run through cover plate main body (1) afterwards with the bottom face of negative terminal (4)
Contact, the bottom of temperature sensing device (6) is run through bottom insulation plate (2) and is positioned at lithium battery interior.
The anti-overcharge battery cover board of safety the most according to claim 1, it is characterised in that: described temperature sensing device (6) wraps
Include the top cover (6-1) and induction end (6-3) being made of an electrically conducting material, the company of fixing between described top cover (6-1) and induction end (6-3)
It is connected to insulation cylinder (6-2)；Described induction end (6-3) is built with liquid conducting medium (6-4), and insulation cylinder (6-2) is internal to be opened
It is communicated with the capillary tube (6-5) of top cover (6-1) and induction end (6-3).
The anti-overcharge battery cover board of safety the most according to claim 3, it is characterised in that: the two of described insulation cylinder (6-2)
End is threaded connection respectively or fluid sealant is connected with top cover (6-1), induction end (6-3), makes the internal shape of temperature sensing device (6)
Become sealing state.
The anti-overcharge battery cover board of safety the most according to claim 3, it is characterised in that: in described insulation cylinder (6-2)
Between periphery be provided with little annular boss (6-6), the top periphery of induction end (6-3) is provided with big annular boss (6-7)；Described temperature sense
Answer device (6) to be fastened on bottom insulation plate (2) by big annular boss (6-7) above and to be connected with cover plate main body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620641379.9U CN205810884U (en) | 2016-06-24 | 2016-06-24 | Safety anti-overcharging cover plate of ternary lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620641379.9U CN205810884U (en) | 2016-06-24 | 2016-06-24 | Safety anti-overcharging cover plate of ternary lithium battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205810884U true CN205810884U (en) | 2016-12-14 |
Family
ID=57505085
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620641379.9U Withdrawn - After Issue CN205810884U (en) | 2016-06-24 | 2016-06-24 | Safety anti-overcharging cover plate of ternary lithium battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205810884U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105895835A (en) * | 2016-06-24 | 2016-08-24 | 合肥国轩高科动力能源有限公司 | Safety anti-overcharging cover plate of ternary lithium battery |
-
2016
- 2016-06-24 CN CN201620641379.9U patent/CN205810884U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105895835A (en) * | 2016-06-24 | 2016-08-24 | 合肥国轩高科动力能源有限公司 | Safety anti-overcharging cover plate of ternary lithium battery |
| CN105895835B (en) * | 2016-06-24 | 2018-07-17 | 合肥国轩高科动力能源有限公司 | Safety anti-overcharging cover plate of ternary lithium battery |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20161214 Effective date of abandoning: 20180717 |