CN208433461U - Protector and battery - Google Patents
Protector and battery Download PDFInfo
- Publication number
- CN208433461U CN208433461U CN201821159737.8U CN201821159737U CN208433461U CN 208433461 U CN208433461 U CN 208433461U CN 201821159737 U CN201821159737 U CN 201821159737U CN 208433461 U CN208433461 U CN 208433461U
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- CN
- China
- Prior art keywords
- terminal
- protector
- elastic slice
- body part
- conducting piece
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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
Abstract
A kind of protector and battery.The protector is for protecting battery core and including insulation shell, first terminal, Second terminal, elastic slice and conducting piece with accommodating space.First terminal, Second terminal are set to insulation shell, and Second terminal is separably contacted with first terminal.First terminal has body part.Elastic slice is located in accommodating space and is located above body part, and when the temperature of elastic slice is more than or equal to preset temperature, elastic slice deformation separates Second terminal with first terminal.Conducting piece extends to body part for the tab electric coupling with battery core, conducting piece and first terminal electric coupling.By the way that conducting piece is extended to body part, conduction efficiency can be increased, improve the trigger sensitivity of protector, so as to protect battery core in time.
Description
Technical field
The utility model relates to a kind of protector and batteries, more particularly to a kind of protector and electricity for overheating protection
Pond.
Background technique
In existing battery structure, it will usually battery core be connected with protector, to lead to when the temperature anomaly of battery core increases
Overprotection device cuts off or is greatly reduced the charging and discharging currents of battery core, to play the role of protecting battery core.
However, the movement that will lead to protector trigger protection is deposited when the heat transfer efficiency between battery core and protector is lower
Postponing, battery core cannot be protected in time.That is, in battery core temperature, raising or temperature have reached thermal runaway danger area extremely
When, the temperature for making protector heated since heat transfer efficiency is lower is still not up to the temperature of starting protection movement, until protection
When the heated temperature of device reaches the temperature of trigger protection movement, battery core thermal runaway.
Summary of the invention
The one of the utility model, which is designed to provide one kind, can increase heat transfer efficiency to improve the spirit of trigger protection movement
The protector of sensitivity.
The utility model protector, for protecting battery core；The protector includes:
Insulation shell has accommodating space；
First terminal is set to the insulation shell, and has body part；
Second terminal is set to the insulation shell, and separably contacts with the first terminal；
Elastic slice, position is in the accommodating space and above the body part, when the temperature of the elastic slice is more than or equal to
When preset temperature, the elastic slice deformation separates the Second terminal with the first terminal；And
Conducting piece, for the tab electric coupling with the battery core, the conducting piece and the first terminal electric coupling, and prolong
Extend to the body part.
Protector described in the utility model, the insulation shell also have bottom wall, and the bottom wall has opening, the ontology
Position is exposed in the accommodating space and from the opening, and the conducting piece is connect with the body part.
Protector described in the utility model, the protector further include positive temperature coefficient element, the positive temperature coefficient
Element is set between the body part and the elastic slice.
Protector described in the utility model, the width of the conducting piece are more than or equal to the 1/2 of the width of the body part.
The table that the body part exposes the opening is completely covered in protector described in the utility model, the conducting piece
Face.
Protector described in the utility model, the first terminal also have the junction stretched out outside the insulation shell, institute
Conducting piece is stated to connect with the junction and the body part.
Protector described in the utility model, when the temperature of the elastic slice be less than the preset temperature when, the elastic slice with
At least one electric coupling in the first terminal and the Second terminal.
Protector described in the utility model, when the temperature of the elastic slice is less than the preset temperature, the first end
The sub and described Second terminal electric coupling.
Protector described in the utility model, when the temperature of the elastic slice is more than or equal to the preset temperature, the bullet
Piece and the first terminal and the Second terminal pass through the elastic slice electric coupling.
Protector described in the utility model, when the temperature of the elastic slice be less than the preset temperature when, the elastic slice with
The first terminal and the equal electric coupling of the Second terminal.
Protector described in the utility model, when the temperature of the elastic slice be less than the preset temperature when, the elastic slice with
The first terminal and the Second terminal one of them electric coupling.
Protector described in the utility model, the battery core include sealing edge, and the protector is arranged in the sealing edge
On.
The another object of the utility model is to provide a kind of battery, and the battery includes battery core and aforementioned protector.
The utility model has the beneficial effects that: biography can be increased by the position that conducting piece is extended to neighbouring elastic slice
Efficiency is led, the trigger sensitivity of protector is improved, so as to protect battery core in time.
Detailed description of the invention
Fig. 1 is a schematic diagram, illustrates the first embodiment of the utility model battery；
Fig. 2 is a schematic cross-section, illustrates state of the protector in normality of the first embodiment；
Fig. 3 is a schematic cross-section, illustrates state of the protector in triggering of the first embodiment；
Fig. 4 is a schematic cross-section, illustrates the protector of the second embodiment of the utility model battery；
Fig. 5 is a schematic cross-section, illustrates the protector of the 3rd embodiment of the utility model battery；
Fig. 6 is a schematic cross-section, illustrates the protector of the fourth embodiment of the utility model battery；And
Fig. 7 is a schematic cross-section, illustrates the protector of the 5th embodiment of the utility model battery.
Specific embodiment
The utility model is described in detail with reference to the accompanying drawings and embodiments.
Refering to fig. 1 with Fig. 2, the first embodiment of the utility model battery includes a battery core 1 and a protector 2, protector
2 connect with battery core 1 for protecting battery core 1.
In the present embodiment, battery core 1 is illustrated by taking the battery core 1 of soft-package battery as an example, is the tab of positive and negative electrode including two
11 and a sealing edge 12.In the embodiment of variation, battery is also possible to the battery encapsulated by metal-back.
Protector 2 include insulation shell 21, first terminal 22, Second terminal 23, elastic slice 24, positive temperature coefficient (PTC,
Positive Temperature Coefficient) 25, two conducting pieces 26,27 of element and a cover board 28.Insulation shell 21 has
There are an accommodating space 211 and a bottom wall 212.First terminal 22 is set to insulation shell 21, and has the body part set on bottom wall 212
221 and one stretch out insulation shell 21 outside junction 222.The bottom wall 212 of insulation shell 21 has an opening 213, and first terminal 22
Body part 221 be located in accommodating space 211 and expose from opening 213.Second terminal 23 is set to insulation shell 21, and has and the
The elastic arm 231 and one that one terminal 22 separably contacts stretch out the junction 232 outside insulation shell 21.It is empty that elastic slice 24 is located at accommodating
In and be located at the top of body part 221, can deformation when the temperature of elastic slice 24 is more than or equal to preset temperature.Elastic slice 24 specifically can example
Such as bimetal leaf, because the bimetallic coefficient of expansion is different, when its temperature is more than or equal to preset temperature, bimetallic is generated different
Elongation and Bending Deformation, preset temperature are the temperature for making elastic slice 24 generate deformation.Two conducting pieces 26,27 are defined as first
Conducting piece 26 and the second conducting piece 27, wherein the first conducting piece 26 and 22 electric coupling of first terminal, the second conducting piece 27 and second
23 electric coupling of terminal.In the present embodiment, the junction 222 of the first conducting piece 26 and first terminal 22 welds and extends to ontology
Portion 221.And first conducting piece 26 contacted with body part 221, can for free state contact, or can pass through welding, double-sided adhesive
Bonding or heat-conducting glue (cream) bonding form connection status contact.Second conducting piece 27 and the junction 232 of Second terminal 23 weld
It connects.The material of conducting piece 26,27, can be such as nickel, nickel alumin(i)um alloy, nickel plating copper sheet, nickel plating aluminium flake or albronze.First conduction
The width of part 26 is preferable be more than or equal to the width of the body part 221 1/2, and in the present embodiment, the first conducting piece 26 is complete
All standing body part 221 exposes the surface of opening, but in the embodiment of variation, the first conducting piece 26
The some of body part 221 can be only covered, such as second embodiment shown in Fig. 4, the first conducting piece 26 be complete
All standing body part 221 exposes the surface of opening.Cover board 28 is set in insulation shell 21 and covers in first terminal 22 and second end
23 top of son, is used to support to resist external pressure, to protect the coupling circuit between first terminal 22 and Second terminal 23.
Referring again to Fig. 1 and Fig. 2, in the present embodiment, two tabs 11 of battery core 1 (are not schemed to connect external electric device
Show), tab 11 (can the be positive or negative pole) electric coupling set on sealing edge 12 and the first conducting piece 26 and wherein of protector 2,
Second conducting piece 27 is connected on protector 2 and external electric device between two tabs 11 and is formed to connect external electric device
One current path, the current path are the charge-discharge circuit of battery core 1.It can with 11 electric coupling of tab by the first conducting piece 26
Thermal energy in battery core 1 is conducted by first terminal 26 to elastic slice 24, and the first conducting piece 26 with junction 222 in addition to connecting
Except, also further it is connect with body part 221, and thermal energy can be made more quickly and efficiently to conduct to elastic slice 24, be conducive to elastic slice
24 timely trigger action cuttings or the charging and discharging currents that battery core 1 is greatly reduced.As shown in Fig. 2, under normal conditions, i.e., when elastic slice 24
When temperature is less than preset temperature, the elastic arm 231 of Second terminal 23 directly contacts to form electric coupling with first terminal 22, keeps electric current logical
The electric current on road directly circulates via first terminal 22 and Second terminal 23.As shown in figure 3, in the present embodiment, when elastic slice 24 by
When the energy heats heating of first conducting piece 26 transmitting reaches preset temperature or is more than preset temperature, elastic slice 24 generates deformation and band
The elastic arm 231 of dynamic Second terminal 23 is separated with first terminal 22, at this moment, passes through elastic slice between first terminal 22 and Second terminal 23
24 and 25 electric coupling of positive temperature coefficient element, since the resistance value of positive temperature coefficient element 25 increases as the temperature rises and significantly
Add, so that the resistance in charge-discharge circuit be made to increase considerably, and then reduces charging and discharging currents significantly, or even be close to
Zero, to have the function that protect battery core 1.
Refering to Fig. 4, the second embodiment of the utility model battery, roughly the same with first embodiment, difference is,
In second embodiment, the body part 221 that first terminal 22 is not completely covered for the first conducting piece 26 of protector 2 exposes opening 213
Surface.
Refering to Fig. 5, the 3rd embodiment of the utility model battery, roughly the same with first embodiment, difference is,
In 3rd embodiment, when the temperature of elastic slice 24 is less than preset temperature, elastic slice 24 connects with first terminal 22 and Second terminal 23
It connects.That is, elastic slice 24 is being all connected with first terminal 22 and Second terminal 23 under normal conditions, and 25 table of positive temperature coefficient element
The radian in face is matched with the crooked radian of elastic slice 24 and is contacted with each other, to pass through first terminal 22, Second terminal 23 and just
Temperature coefficient element 25 more can increase heat transfer efficiency directly by thermal energy conduction to elastic slice 24.
Refering to Fig. 6, the fourth embodiment of the utility model battery is with the difference of 3rd embodiment, when elastic slice 24
When temperature is less than preset temperature, elastic slice 24 connect with first terminal 22 but does not connect with Second terminal 23, passes through first terminal 22
With positive temperature coefficient element 25 directly by thermal energy conduction to elastic slice 24, heat transfer efficiency also can increase.
Refering to Fig. 7, the 5th embodiment of the utility model battery is the temperature when elastic slice 24 with the difference of 3rd embodiment
When degree is less than preset temperature, elastic slice 24 connect with Second terminal 23 but does not connect with first terminal 22, passes through 23 He of Second terminal
Positive temperature coefficient element 25 also can increase heat transfer efficiency directly by thermal energy conduction to elastic slice 24.
Following experimental example 1,2,3 is based on first embodiment, and wherein experimental example 1 is that the first conducting piece is with body part
Free state contact, experimental example 2 be the first conducting piece with body part be laser welding contact, experimental example 3 be the first conducting piece and
Body part is double-sided adhesive bonded contact；Experimental example 4 is based on second embodiment, i.e. the first conducting piece and body part are freely
State contacts, but the surface that body part exposes opening is not completely covered for the first conducting piece；Comparative example is that the first conducting piece does not prolong
Extend to body part；Experimental example and comparative example overcharge test using the battery core of same model and capacity, each experimental example and right
Ratio is respectively tested 10 times, and the result table for testing percent of pass is listed in the table below 1, and the triggering thermometer of protector is listed in the table below 2.
Table 1
| Experimental example 1 | Experimental example 2 | Experimental example 3 | Experimental example 4 | Comparative example | |
| Overcharge percent of pass | 10/10pass | 10/10pass | 10/10pass | 9/10pass | 5/10pass |
Table 2
Conducting piece it is found that is extended to the position of neighbouring elastic slice by the test result as shown in table 1 and table 2, such as with first
The body part of terminal contacts, and can increase conduction efficiency, improve the trigger sensitivity of protector, so as to protect battery core in time.
Only as described above, only the embodiments of the present invention are implemented when that cannot limit the utility model with this
Range, i.e., generally according to simple equivalent changes and modifications made by the utility model claims book and description, all
Still belong in the range of the utility model covers.
Claims (11)
1. a kind of protector, for protecting battery core；It is characterized by: the protector includes:
Insulation shell has accommodating space；
First terminal is set to the insulation shell, and has body part；
Second terminal is set to the insulation shell, and separably contacts with the first terminal；
Elastic slice, position are preset in the accommodating space and above the body part when the temperature of the elastic slice is more than or equal to
When temperature, the elastic slice deformation separates the Second terminal with the first terminal；And
Conducting piece, for the tab electric coupling with the battery core, the conducting piece and the first terminal electric coupling, and extend to
The body part.
2. protector as described in claim 1, it is characterised in that: the insulation shell also has bottom wall, and the bottom wall, which has, to be opened
Mouthful, the body part is exposed in the accommodating space and from the opening, and the conducting piece is connect with the body part.
3. protector as claimed in claim 2, it is characterised in that: the protector further includes positive temperature coefficient element, described
Positive temperature coefficient element is set between the body part and the elastic slice.
4. protector as claimed in claim 3, it is characterised in that: the width of the conducting piece is more than or equal to the body part
The 1/2 of width.
5. protector as claimed in claim 4, it is characterised in that: the conducting piece is completely covered described in the body part exposing
The surface of opening.
6. protector as described in claim 1, it is characterised in that: the first terminal, which also has, to be stretched out outside the insulation shell
Junction, the conducting piece are connect with the junction and the body part.
7. protector as described in claim 1, it is characterised in that: when the temperature of the elastic slice is less than the preset temperature,
The first terminal and the Second terminal electric coupling.
8. protector as claimed in claim 6, it is characterised in that: when the temperature of the elastic slice is more than or equal to the preset temperature
When, the elastic slice and the first terminal and the Second terminal pass through the elastic slice electric coupling.
9. protector as claimed in claim 6, it is characterised in that: when the temperature of the elastic slice is less than the preset temperature,
The elastic slice and the first terminal and the Second terminal one of them electric coupling.
10. protector as described in claim 1, it is characterised in that: the battery core includes sealing edge, and the protector setting exists
On the sealing edge.
11. a kind of battery, the protector comprising battery core and as described in any claim of claims 1 to 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821159737.8U CN208433461U (en) | 2018-07-20 | 2018-07-20 | Protector and battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821159737.8U CN208433461U (en) | 2018-07-20 | 2018-07-20 | Protector and battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208433461U true CN208433461U (en) | 2019-01-25 |
Family
ID=65097199
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821159737.8U Active CN208433461U (en) | 2018-07-20 | 2018-07-20 | Protector and battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208433461U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020177746A1 (en) * | 2019-03-05 | 2020-09-10 | 宁德新能源科技有限公司 | Protector, battery core and battery |
| CN112968256A (en) * | 2021-02-03 | 2021-06-15 | 东莞新能安科技有限公司 | Electrochemical device and electronic device |
-
2018
- 2018-07-20 CN CN201821159737.8U patent/CN208433461U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020177746A1 (en) * | 2019-03-05 | 2020-09-10 | 宁德新能源科技有限公司 | Protector, battery core and battery |
| CN112968256A (en) * | 2021-02-03 | 2021-06-15 | 东莞新能安科技有限公司 | Electrochemical device and electronic device |
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