CN209607833U - A kind of overcurrent fuse protection structure and lithium ion battery - Google Patents
A kind of overcurrent fuse protection structure and lithium ion battery Download PDFInfo
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- CN209607833U CN209607833U CN201920550536.9U CN201920550536U CN209607833U CN 209607833 U CN209607833 U CN 209607833U CN 201920550536 U CN201920550536 U CN 201920550536U CN 209607833 U CN209607833 U CN 209607833U
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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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Abstract
The utility model relates to battery technology field, a kind of overcurrent fuse protection structure and lithium ion battery are disclosed.Overcurrent fuse protection structure includes pole weld part；Pole weld part is plate structure, and edge plate thickness direction in one side is divided into the first edge and the second edge；Pole weld part extends to form the first fuse part along the bending of entire first edge, forms the second fuse part along entire second edge horizontal extension, forms angle between two fuse part；First fuse part is formed with the first cavity, and the second fuse part is formed with the second cavity, and the bottom of chamber of each cavity with corresponding first/second edge at a distance of pre-determined distance；First fuse part has extended to form the first tab welding portion, and the second fuse part has extended to form the second tab welding portion.Using the present embodiment, fuse part and pole weld part will not be caused to be broken bending back and forth, the area of passage that fuse part has been effectively ensured keeps standard value constant, to avoid fusing ahead of time, ensure that battery quality.
Description
Technical field
The utility model relates to battery technology field more particularly to a kind of overcurrent fuse protection structure and lithium ion batteries.
Background technique
As most mature lithium ion battery is commercialized currently on the market, the high-energy density that has due to it, high circulation
The features such as, it is widely used in automobile power energy supplying system.Especially square lithium ion battery, since the structure of its own is special
Point, so that its pack mode is simple, efficient, energy density loss is few after combo, therefore the side of being widely used in automobile power cell
Shape lithium ion battery.
At the same time, popularizing with new energy product, the security performance of lithium ion battery receives significant attention.Existing
Square lithium ion battery, it will usually which a fuse is set at cathode, which designs as overcurrent fuse protection, one end
It is connect with pole, the connection of the other end and tab.When occurring short circuit inside battery core, electric current is excessive, and fuse can be in a short time
Fusing rapidly prevents battery core from generating the dangerous situations such as explosion on fire so that pole and tab disconnect.
However, in actual use, due to equipment etc., fuse when with pole or tab welding,
Branch is easy portion fractures, so that fuse entirety conveyance capacity reduces, fuse occurs within the scope of safe current and mentions for battery core
Early fusing, causes battery core to be scrapped ahead of time.Lithium battery production automation degree is high, and fuse fracture manually is not easy to find, after being
It is continuous that failure product examine is had many troubles of band, largely effect on shipment efficiency.
Utility model content
The purpose of this utility model is to provide a kind of overcurrent fuse protection structure and lithium ion batteries, solve existing insurance
The problem of silk structure causes battery to be scrapped because being easily broken in the welding process.
For this purpose, the utility model uses following technical scheme:
A kind of overcurrent fuse protection structure, including pole weld part, the pole weld part are the plate with specified thickness
Shape structure, one side edge plate thickness direction are divided into the first edge and the second edge；The pole weld part is along entire first
Edge bending extends to form the first fuse part, forms the second fuse part, first fusing along entire second edge horizontal extension
Angle is formed between portion and the second fuse part；
The plate face of first fuse part is formed with the first cavity, and the bottom of chamber of first cavity and the first edge are apart
First pre-determined distance；The plate face of second fuse part is formed with the second cavity, and the bottom of chamber of second cavity and the first side
Portion is at a distance of the second pre-determined distance；
The side opposite with the first edge of first fuse part has extended to form the first tab welding portion, and described second
The side opposite with the second edge of fuse part has extended to form the second tab welding portion.
Optionally, the pole weld part, the first fuse part, the second fuse part, the first tab welding portion and the second pole
Ear weld part is integrally formed.
Optionally, the pole weld part, the first fuse part, the second fuse part, the first tab welding portion and the second pole
Ear weld part is made of aluminum.
Optionally, first pre-determined distance is equal with the second pre-determined distance.
Optionally, the thickness of first edge and the second edge is equal.
Optionally, first cavity and the second cavity are rectangle, circle or ellipsoidal structure.
A kind of lithium ion battery, including battery case, the intracorporal battery core of installing battery case and be set on battery case
Battery cover, the battery core be equipped with tab, the battery cover be equipped with pole；The lithium ion battery further includes as above any
The overcurrent fuse protection structure；The pole weld part is electrically connected with the pole；The tab is set to and described first
Between tab welding portion and the second tab welding portion, and it is electrically connected respectively with first tab welding portion and the second tab welding portion
It connects.
Optionally, the pole weld part and the pole and the tab and first tab welding portion and the
Two tab welding portions pass through ultrasonic wave or laser welding respectively.
Optionally, explosion-proof valve is additionally provided on the battery cover.
Compared with prior art, the utility model embodiment has the advantages that
Using the utility model embodiment, when electric current is excessive, the first fuse part of overcurrent fuse protection structure and second melts
Disconnected portion can fuse in time, so that tab is electrically connected with pole disconnection, avoid occurring due to short circuit or excess load high current on fire
The safety accidents such as explosion protect the personal safety of electrical appliance and operator.
In addition, the present embodiment is carried out for the fuse part of overcurrent fuse protection structure and the bending part of pole weld part
It improves, so that overcurrent fuse protection structure is overturn in Kuan Mianchu, after tab is put into welding, bending back and forth not
It will cause and be broken between fuse part and pole weld part, the first fuse part/second fuse part area of passage energy has been effectively ensured
It is enough to keep standard value constant afterwards before welding, so that overcurrent fuse protection structure be avoided to fuse ahead of time, it ensure that lithium ion battery
Quality.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, before not making the creative labor property
It puts, can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is the topology view of overcurrent fuse protection structure provided by the embodiment of the utility model.
[figure number explanation]
Pole weld part 1, the first fuse part 2, the second fuse part 3, the first tab welding portion 4, the second tab welding portion 5,
First cavity 6, the second cavity 7.
Specific embodiment
It, below will knot to enable the purpose of utility model, feature, advantage of the utility model more obvious and understandable
The attached drawing in the utility model embodiment is closed, the technical scheme in the utility model embodiment is clearly and completely described,
Obviously, the embodiments described below are only the utility model a part of the embodiment, and not all embodiment.Based on this reality
It is obtained by those of ordinary skill in the art without making creative efforts all other with the embodiment in novel
Embodiment is fallen within the protection scope of the utility model.
Further illustrate the technical solution of the utility model below with reference to the accompanying drawings and specific embodiments.
Referring to Fig. 1, overcurrent fuse protection structure provided in this embodiment includes: pole weld part 1, welded respectively with pole
The first fuse part 2 and the second fuse part 3 that socket part 1 is connected, the first tab welding portion 4 being connect with the first fuse part 2, and
The second tab welding portion 5 being connect with the second fuse part 3.
Pole weld part 1, the first fuse part 2 and the second fuse part 3, the first tab welding portion 4 and the second tab welding portion 5
It is chosen as having the identical material of satisfactory electrical conductivity to be integrally formed, such as aluminium.
Specifically, pole weld part 1 is the plate structure with specified thickness, edge plate thickness direction in one side is divided into
First edge and the second edge.Pole weld part 1 extends to form the first fuse part 2 along the bending of entire first edge, along entire the
Two edge horizontal extensions form the second fuse part 3, form angle between the first fuse part 2 and the second fuse part 3.The corner dimension
It is unlimited, in practical applications, the first fuse part 2 or the second fuse part 3 can be bent repeatedly as needed.First edge and the second side
The thickness in portion can be identical, so that subsequent the first fuse part 2 extended to form is identical as the plate thickness of the second fuse part 3, convenient for control
Make the fusing value of the two.
The plate face of first fuse part 2 is formed with the first cavity 6, and the bottom of chamber of the first cavity 6 and the first edge are at a distance of first
Pre-determined distance；The plate face of second fuse part 3 is formed with the second cavity 7, and the bottom of chamber of the second cavity 7 and the first edge are at a distance of second
Pre-determined distance.The structure of first cavity 6 and the second cavity 7 can be rectangle, or other knots such as round or ellipse
Structure, cavity size need the fusing condition met according to the actual needs of setting to be arranged.
The side opposite with the first edge of first fuse part 2 has extended to form the first tab welding portion 4, the second fuse part
3 side opposite with the second edge has extended to form the second tab welding portion 5.
Pole weld part 1 is used to weld with the pole on the battery cover of lithium battery, and welding manner can be laser welding,
It can be ultrasonic bonding, it is specific unlimited.
First tab welding portion 4 and the second tab welding portion 5 is used to and tab welding, welding manner can be Laser Welding
It connects or ultrasonic bonding, it is specific unlimited.In use, the first fuse part 2 or the second fuse part 3 are first bent, so that first
Tab is clamped in tab welding portion 4 and the second tab welding portion 5, then the two sides of tab is welded with corresponding tab welding portion
It connects.
When battery short circuit, entire circuit moment generates biggish electric current, and due to the first fuse part 2 and the second fuse part
3 plate face makes that the area of passage in the region is too small, resistance is big because being formed with cavity structure, therefore the first fuse part 2 and
High temperature fusing can occur first for two fuse part 3, so that the connection of pole and tab disconnects, play the role of similar fuse, from
And battery temperature is avoided to continue to rise, avoid battery from high temperature, explosion or the dangerous phenomenon such as on fire occur.
In the bending process repeatedly of the first fuse part 2 or the second fuse part 3, since the first fuse part 2/ second fuses
It is reserved with predetermined width between the plate face cavity bottom in portion 3 and the first edge/second edge, is directly opened with by cavity to first
Edge/second edge mode is compared, 2/ second fuse part 3 of the first fuse part and the first edge/second edge link position
Not easy to break, the area of passage that 2/ second fuse part 3 of the first fuse part has been effectively ensured can keep standard value afterwards before welding
It is constant, so that it is guaranteed that 2/ second fuse part 3 of the first fuse part will not fuse ahead of time, battery core is avoided to scrap ahead of time.
The present embodiment can provide a kind of lithium ion battery, comprising: and battery case installs the intracorporal battery core of battery case, if
The battery cover being placed on battery case and above-mentioned overcurrent fuse protection structure.
Wherein, battery core is equipped with tab, and battery cover is equipped with pole.The pole weld part 1 of overcurrent fuse protection structure with
Pole electrical connection；Tab is set between the first tab welding portion 4 and the second tab welding portion 5 of overcurrent fuse protection structure,
And it is electrically connected with the first tab welding portion 4 and the second tab welding portion 5.
By the overcurrent fuse protection structure with excellent conductive performance, pole on the tab and battery cover of battery core is realized
Electrical connection.At the same time, when electric current is excessive, the first fuse part 2 of overcurrent fuse protection structure and 3 meeting of the second fuse part and
When fuse so that the disconnection of tab and pole be electrically connected, avoid pacifying since explosion on fire etc. occurs for short circuit or excess load high current
Full accident protects the personal safety of electrical appliance and operator.
In addition, the present embodiment is carried out for the fuse part of overcurrent fuse protection structure and the bending part of pole weld part 1
It improves, so that overcurrent fuse protection structure is overturn in Kuan Mianchu, after tab is put into welding, bending will not be made back and forth
It is broken between fuse part and pole weld part 1, so that overcurrent fuse protection structure be avoided to fuse ahead of time, ensure that lithium-ion electric
The quality in pond.
The above, above embodiments are only to illustrate the technical solution of the utility model, rather than its limitations；Although ginseng
The utility model is described in detail according to previous embodiment, those skilled in the art should understand that: it is still
It is possible to modify the technical solutions described in the foregoing embodiments, or part of technical characteristic is equally replaced
It changes；And these are modified or replaceed, various embodiments of the utility model technical solution that it does not separate the essence of the corresponding technical solution
Spirit and scope.
Claims (9)
1. a kind of overcurrent fuse protection structure, including pole weld part, which is characterized in that the pole weld part is with specified
The plate structure of thickness, one side edge plate thickness direction are divided into the first edge and the second edge；Pole weld part edge
Entire first edge bending extends to form the first fuse part, forms the second fuse part along entire second edge horizontal extension, described
Angle is formed between first fuse part and the second fuse part；
The plate face of first fuse part is formed with the first cavity, and the bottom of chamber of first cavity and the first edge are at a distance of first
Pre-determined distance；The plate face of second fuse part is formed with the second cavity, and the bottom of chamber of second cavity and the first edge phase
Away from the second pre-determined distance；
The side opposite with the first edge of first fuse part has extended to form the first tab welding portion, second fusing
The side opposite with the second edge in portion has extended to form the second tab welding portion.
2. overcurrent fuse protection structure according to claim 1, which is characterized in that the pole weld part, the first fusing
Portion, the second fuse part, the first tab welding portion and the second tab welding portion are integrally formed.
3. overcurrent fuse protection structure according to claim 1, which is characterized in that the pole weld part, the first fusing
Portion, the second fuse part, the first tab welding portion and the second tab welding portion are made of aluminum.
4. overcurrent fuse protection structure according to claim 1, which is characterized in that first pre-determined distance and second is in advance
If being equidistant.
5. overcurrent fuse protection structure according to claim 1, which is characterized in that first edge and the second edge
Thickness is equal.
6. overcurrent fuse protection structure according to claim 1, which is characterized in that first cavity and the second cavity are
Rectangle, circle or ellipsoidal structure.
7. a kind of lithium ion battery including battery case, the intracorporal battery core of installing battery case and is set on battery case
Battery cover, the battery core are equipped with tab, and the battery cover is equipped with pole；It is characterized in that, the lithium ion battery also wraps
Include the overcurrent fuse protection structure as described in claim 1 to 6 is any；The pole weld part is electrically connected with the pole；Institute
Tab is stated to be set between first tab welding portion and the second tab welding portion, and with first tab welding portion and the
Two tab welding portions are electrically connected.
8. lithium ion battery according to claim 7, which is characterized in that the pole weld part and the pole, and
The tab and first tab welding portion and the second tab welding portion pass through ultrasonic wave or laser welding respectively.
9. lithium ion battery according to claim 7, which is characterized in that be additionally provided with explosion-proof valve on the battery cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920550536.9U CN209607833U (en) | 2019-04-22 | 2019-04-22 | A kind of overcurrent fuse protection structure and lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920550536.9U CN209607833U (en) | 2019-04-22 | 2019-04-22 | A kind of overcurrent fuse protection structure and lithium ion battery |
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| Publication Number | Publication Date |
|---|---|
| CN209607833U true CN209607833U (en) | 2019-11-08 |
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ID=68407661
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920550536.9U Active CN209607833U (en) | 2019-04-22 | 2019-04-22 | A kind of overcurrent fuse protection structure and lithium ion battery |
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| Country | Link |
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| CN (1) | CN209607833U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023092998A1 (en) * | 2021-11-29 | 2023-06-01 | 湖北亿纬动力有限公司 | Cell connecting sheet and cell battery |
-
2019
- 2019-04-22 CN CN201920550536.9U patent/CN209607833U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023092998A1 (en) * | 2021-11-29 | 2023-06-01 | 湖北亿纬动力有限公司 | Cell connecting sheet and cell battery |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220112 Address after: 215500 room 808, No. 1, Southeast Avenue, Changshu high tech Industrial Development Zone, Changshu, Suzhou, Jiangsu Patentee after: Jiangsu Zhengli new energy battery technology Co.,Ltd. Address before: 523795 No.9 Jiayuan Road, Xiangshan Industrial Park, songmushan village, Dalang Town, Dongguan City, Guangdong Province Patentee before: DONGGUAN TAFEL NEW ENERGY TECHNOLOGY Co.,Ltd. Patentee before: JIANGSU TAFEL NEW ENERGY TECHNOLOGY Co.,Ltd. Patentee before: SHENZHEN TAFEL NEW ENERGY TECHNOLOGY Co.,Ltd. |