CN105702908A - Multi-stage over-current protection device of lithium ion battery - Google Patents
Multi-stage over-current protection device of lithium ion battery Download PDFInfo
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- CN105702908A CN105702908A CN201610040722.9A CN201610040722A CN105702908A CN 105702908 A CN105702908 A CN 105702908A CN 201610040722 A CN201610040722 A CN 201610040722A CN 105702908 A CN105702908 A CN 105702908A
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- fusible
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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
- 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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- 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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- General Chemical & Material Sciences (AREA)
- Connection Of Batteries Or Terminals (AREA)
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Abstract
The invention provides a multi-stage over-current protection device of a lithium ion battery, belonging to the field of an over-current protection device of the lithium ion battery. The multi-stage over-current protection device comprises single batteries, a current collection plate and at least two over-current fusible protection devices, wherein the single batteries and the current collection plate are connected by the over-current fusible protection devices. The multi-stage over-current protection device of the lithium ion battery, provided by the invention, can form multi-stage fuse protection when the interior of a battery pack encounters an over-current situation, such as short-circuit and large-current situations, the influence on the performance of the lithium battery is avoided, risk situations such as high temperature or combustion are prevented, and personal and property safety of a user and a contact environment can be guaranteed.
Description
Technical field
The present invention relates to lithium ion battery overcurrent protective device field, in particular to a kind of multistage overcurrent protective device of lithium ion battery。
Background technology
Along with development and the level of consumption of society improve, automobile uses more and more universal, and global environmental pollution and oil shortage problem are also more and more prominent。Then new-energy automobile arises at the historic moment, wherein electric automobile environmental protection, noiselessness。Its electrokinetic cell used is using lithium battery as the energy, forms the set of cells of specified vol after gathering a number of battery cell series and parallel。
Lithium battery interior has a kind of mechanical overtemperature protection mechanism; when the situation that electric current short-circuit, big occurs in charging and discharging circuit; lithium battery heating can be caused to produce a certain amount of heat gas; this heat gas can cause the mechanical type overcurrent protection mechanism action of inside battery; the pole piece disconnecting inside battery connects, and battery can be had certain protective effect by under normal conditions。But as the electrokinetic cell that new-energy automobile uses; it uses circumstance complication; discharge and recharge time and current requirements are higher; if in use the protection mechanism of inside battery produces to lose efficacy due to vibrations or the factor such as the aging of product, improper use, cannot play a role in time to protect battery when crossing stream。
Additionally; also there is the overcurrent protection mechanism containing a kind of primary in some lithium battery set product; such as wire shape or the stream fusing part excessively of lamellar; if this primary fuse protection also lost efficacy in certain extreme cases; at this moment battery can be made to produce excessive heat for set of cells; ultimately cause high temperature, situation about even exploding of burning occurs, and jeopardizes the person and the property safety of exposed population group。
Summary of the invention
The invention provides a kind of multistage overcurrent protective device of lithium ion battery, it is intended to improve the problems referred to above。
The present invention is achieved in that
A kind of multistage overcurrent protective device of lithium ion battery, crosses stream fusible protection device including battery cell, collector plate and at least two, and described battery cell is connected by described stream fusible protection device of crossing with described collector plate。
Further; each described stream fusible protection device of crossing all includes device body and fusible electrode ear; described fusible electrode ear is arranged on described device body, and described battery cell is connected with described collector plate by described device body and described fusible electrode ear。
Be short-circuited at internal battery pack, big electric current, by the fusing of fusible electrode ear, thus by battery circuit cut off, to avoid the performance impact to lithium battery, it is prevented that the dangerous situation such as high temperature or burning occur。
Further, the fusible electrode ear crossing stream fusible protection device near described battery cell is connected with described battery cell, and this device body crossing stream fusible protection device connects with adjacent stream fusible protection device of crossing or is connected with described collector plate。
Further, described device body is tabular, and described fusible electrode ear includes fixed part and fuse part, and described fixed part is connected by described fuse part with described device body, described fixed part is connected with described battery cell, and described device body is connected with described collector plate。
Device body is tabular, it is simple to be connected with collector plate, makes stream fusible protection device generally form a platy structure。When set of cells is protected; the device body of tabular is first welded in collector plate; again the fixed part of each fusible electrode ear is welded on the electrode on the battery cell of each correspondence; if exceeded the maximum current-carrying of its design by the electric current of some fusible electrode ear; the fuse part energy moment fusing of fusible electrode ear; thus protecting this single battery monomer to avoid the generation of its explosive event; and cut off in set of cells the contact between other battery cells, do not affect the work of other lithium batteries。
Further, described device body is lamellar, and described fusible electrode ear includes interconnective stator and fuse link, and described stator is connected by described fuse link with described device body, described stator is connected with described battery cell, and described device body is connected with described collector plate。
Device body is lamellar, made stream fusible protection device actually be combined by the device body of multiple lamellars and is formed。When set of cells is protected; the device body of lamellar is first welded in collector plate; again the stator of each fusible electrode ear is welded on the electrode on the battery cell of each correspondence; if exceeded the maximum current-carrying of its design by the electric current of some fusible electrode ear; the fuse link energy moment fusing of fusible electrode ear; thus protecting this single battery monomer to avoid the generation of its explosive event; and cut off in set of cells the contact between other battery cells, do not affect the work of other lithium batteries。
Further, described device body is U-shaped, the longitudinal section camber of described fuse link。
Fuse link employing arc, fusing is more accurate, other battery cells will not produce impact, and be prevented from the accident again touched after fusing, more safely and effectively。
Further; described stream fusible protection device of crossing is two; respectively primary stream fusible protection device and the secondary stream fusible protection device of crossing crossed, the described secondary rated blowing-current crossing stream fusible protection device is more than the described primary rated blowing-current crossing stream fusible protection device。
Primary stream fusible protection device of crossing can play primary protective effect；Even if when primary cross stream fusible protection device be likely to lose efficacy, secondary stream fusible protection device of crossing also can play protective effect。
Further, described primary stream fusible of crossing protects device and described one of them mistake in stream fusible protection device secondary to be connected with the positive pole of described battery cell, and another is connected with the negative pole of described battery cell。
Primary stream fusible protection device of crossing can be respectively arranged at the both positive and negative polarity of battery cell or mutual reversing of position with secondary stream fusible protection device of crossing, and all can realize the effect of multi-stage protection。
Further; described primary stream fusible of crossing protects device and described secondary stream fusible protection device of crossing to be arranged at the negative or positive electrode of described battery cell simultaneously; described primary stream fusible of crossing protects device and described secondary stream fusible protection device of crossing to be connected with each other; described primary stream fusible of crossing protects device and the described secondary fusible electrode ear of one of them crossed in stream fusible protection device to be connected with described battery cell, and another device body is connected with described battery cell。
Primary stream fusible protection device of crossing can be arranged at the same electrode of battery cell with secondary stream fusible protection device of crossing simultaneously, is arranged at positive pole simultaneously or is arranged at negative pole simultaneously, all can realize multi-stage protection effect。
Further, described collector plate is provided with through hole in the position of corresponding described fusible electrode ear。
By arranging through hole in collector plate, it is simple to carry out the welding of battery。
The multistage overcurrent protective device of lithium ion battery provided by the invention provides the benefit that: the multistage overcurrent protective device of this lithium ion battery can when internal battery pack generation overcurrent condition; such as be short-circuited, big electric current when; form multistage fuse protection; to avoid the performance impact to lithium battery; prevent the dangerous situation such as high temperature or burning from occurring, it is possible to ensure the person and the property safety of user and contact environment。
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, the accompanying drawing used required in embodiment will be briefly described below, it is to be understood that, the following drawings illustrate only certain embodiments of the present invention, therefore the restriction to scope it is not construed as, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other relevant accompanying drawings according to these accompanying drawings。
The perspective view at the visual angle, wherein side of the multistage overcurrent protective device of lithium ion battery that Fig. 1 provides for the embodiment of the present invention；
The perspective view at the opposite side visual angle of the multistage overcurrent protective device of lithium ion battery that Fig. 2 provides for the embodiment of the present invention；
The decomposition texture schematic diagram of the multistage overcurrent protective device of lithium ion battery that Fig. 3 provides for the embodiment of the present invention；
The primary structural representation crossing stream fusible protection device of the multistage overcurrent protective device of lithium ion battery that Fig. 4 provides for the embodiment of the present invention；
The structural representation of the secondary single screening glass crossing stream fusible protection device of the multistage overcurrent protective device of lithium ion battery that Fig. 5 provides for the embodiment of the present invention。
Figure acceptance of the bid note is respectively as follows:
Battery cell 10；
Collector plate 20；Through hole 201；
Cross stream fusible protection device 30；
Primary stream fusible of crossing protects device 301；Primary device body 3011；Primary fusible electrode ear 3012；Fixed part 3013；Fuse part 3014；
Secondary stream fusible of crossing protects device 302；Second unit body 3021；Secondary fusible electrode ear 3022；Stator 3023；Fuse link 3024。
Detailed description of the invention
For making the purpose of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is a part of embodiment of the present invention, rather than whole embodiments。Generally can with various different configurations arrange and design with the assembly of the embodiment of the present invention that illustrate described in accompanying drawing herein。Therefore, below the detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit claimed the scope of the present invention, but is merely representative of the selected embodiment of the present invention。Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of protection of the invention。
Embodiment
Refer to Fig. 1～Fig. 3; present embodiments provide a kind of multistage overcurrent protective device of lithium ion battery; crossing stream fusible protection device 30 including battery cell 10, collector plate 20 and at least two, battery cell 10 passed through stream fusible protection device 30 and was connected with collector plate 20。
Each stream fusible protection device 30 of crossing all includes device body and fusible electrode ear, and fusible electrode ear is arranged on device body, and battery cell 10 is connected with collector plate 20 by device body and fusible electrode ear。As preferably, fusible electrode ear can adopt aluminium, nickel material or nickel plating material to make。Fusible electrode ear has flexible fuse portion, the effect flexibly connected can be played on the one hand, more install, more reliable；Being on the other hand be designed in conjunction with the conversion relation of rated current and material cross-section, when exceeding its rated blowing-current, fusing in time plays protective effect。
Be short-circuited at internal battery pack, big electric current, by the fusing of fusible electrode ear, thus by battery circuit cut off, to avoid the performance impact to lithium battery, it is prevented that the dangerous situation such as high temperature or burning occur。
The quantity crossing stream fusible protection device 30 can be two, three, four or more。The installation site crossing stream fusible protection device 30 can be the positive pole of battery cell 10; can also the negative pole of battery cell 10; not concrete restriction; can be individually connected between battery cell 10 and collector plate 20, it is also possible to be that multiple stream fusible protection device 30 of crossing is connected with each other and is connected between battery cell 10 and collector plate 20。When crossing stream fusible protection device 30 and being individually connected between battery cell 10 and collector plate 20, the fusible electrode ear crossing stream fusible protection device 30 is connected with battery cell 10, and device body is connected with collector plate 20；When multiple fusible protection devices 30 of stream excessively are connected with each other and are connected between battery cell 10 and collector plate 20; the fusible electrode ear crossing stream fusible protection device 30 near battery cell 10 is connected with battery cell 10; and this device body crossing stream fusible protection device 30 connects with adjacent stream fusible protection device 30 of crossing, the device body crossing stream fusible protection device 30 near collector plate 20 is connected with collector plate 20。It addition, cross the stream fusible protection device body of device 30 and fusible electrode ear can adopt arbitrary shape, if ensure that be short-circuited at internal battery pack, big electric current, fusible electrode ear can fuse。
Refer to Fig. 1～Fig. 5; for the convenient structure that this protection device is described and principle; in the present embodiment; crossing stream fusible protection device 30 is two; respectively primary stream fusible protection device 301 of crossing crosses stream fusible protection device 302 with secondary; further, the secondary rated blowing-current crossing stream fusible protection device 302 crosses the rated blowing-current of stream fusible protection device 301 more than primary。As preferably, the secondary rated blowing-current crossing stream fusible protection device 302 is designed as 1～1.5 times of the primary rated blowing-current crossing stream fusible protection device 301。
So, device body is divided into primary device body 3011 and second unit body 3021, fusible electrode ear to be divided into primary fusible electrode ear 3012 and secondary fusible electrode ear 3022。It addition, collector plate 20 is two pieces, it is respectively arranged at positive pole and the negative pole of battery cell 10。Collector plate 20 is provided with through hole 201 in the position of corresponding primary fusible electrode ear 3012 or secondary fusible electrode ear 3022。By arranging through hole 201 in collector plate 20, it is simple to carry out the welding of battery。
Wherein, referring to Fig. 1～Fig. 4, primary stream fusible protection device 301 of crossing is arranged at the negative pole of battery cell 10。The primary primary device body 3011 crossing stream fusible protection device 301 is tabular; its primary fusible electrode ear 3012 includes fixed part 3013 and fuse part 3014; fixed part 3013 is connected by fuse part 3014 with primary device body 3011; fixed part 3013 is connected with the negative pole of battery cell 10, and primary device body 3011 is connected with collector plate 20。
Primary stream fusible protection device 301 of crossing generally forms a platy structure, and primary device body 3011 is a plate, is connected to multiple primary fusible electrode ear 3012 above。When set of cells is protected, the primary device body 3011 of tabular is first welded in collector plate 20, again the fixed part 3013 of each primary fusible electrode ear 3012 is welded on the electrode on the battery cell 10 of each correspondence, if exceeded the maximum current-carrying of its design by the electric current of some primary fusible electrode ear 3012, the fuse part 3014 of primary fusible electrode ear 3012 can fuse moment, thus protecting this single battery monomer 10 to avoid the generation of its explosive event, and cut off in set of cells the contact between other battery cells 10, do not affect the work of other lithium batteries。
Additionally, refer to Fig. 1～Fig. 3 and Fig. 5, secondary stream fusible protection device 302 of crossing is arranged at the positive pole of battery cell 10, secondary stream fusible protection device 302 of crossing includes multiple screening glass, each screening glass all includes second unit body 3021 and secondary fusible electrode ear 3022, second unit body 3021 is lamellar, secondary fusible electrode ear 3022 includes interconnective stator 3023 and fuse link 3024, stator 3023 is connected by fuse link 3024 with second unit body 3021, stator 3023 is connected with battery cell 10, second unit body 3021 is connected with collector plate 20。
Second unit body 3021 is U-shaped, the longitudinal section camber of fuse link 3024。Fuse link 3024 adopts arc, and fusing is more accurate, other battery cells 10 will not produce impact, and be prevented from the accident again touched after fusing, more safely and effectively。
When set of cells is protected, the second unit body 3021 of lamellar is first welded in collector plate 20, again the stator 3023 of each secondary fusible electrode ear 3022 is welded on the electrode on the battery cell 10 of each correspondence, if exceeded the maximum current-carrying of its design by the electric current of some secondary fusible electrode ear 3022, the fuse link 3024 of secondary fusible electrode ear 3022 can fuse moment, thus protecting this single battery monomer 10 to avoid the generation of its explosive event, and cut off in set of cells the contact between other battery cells 10, do not affect the work of other lithium batteries。
It should be understood that refer to Fig. 1～Fig. 5, primary stream fusible protection device 301 of crossing is connected with the positive pole of battery cell 10 with one of them mistake in stream fusible protection device 302 secondary, and another is connected with the negative pole of battery cell 10。It is to say, primary stream fusible protection device 301 of crossing can be respectively arranged at the both positive and negative polarity of battery cell 10 or mutual reversing of position with secondary stream fusible protection device 302 of crossing, the effect of multi-stage protection all can be realized。
Additionally; primary stream fusible protection device 301 of crossing can be arranged at the negative or positive electrode of battery cell 10 with secondary stream fusible protection device 302 of crossing simultaneously; primary stream fusible protection device 301 of crossing is connected with each other with secondary stream fusible protection device 302 of crossing; primary stream fusible protection device 301 of crossing is connected with battery cell 10 with the secondary fusible electrode ear of one of them crossed in stream fusible protection device 302, and another device body is connected with battery cell 10。It is to say, primary stream fusible protection device 301 of crossing can be arranged at the same electrode of battery cell 10 with secondary stream fusible protection device 302 of crossing simultaneously, it is arranged at positive pole simultaneously or is arranged at negative pole simultaneously, all can realize multi-stage protection effect。
Additionally; primary stream fusible protection device 301 of crossing can also exchange with the secondary shape crossing stream fusible protection device 302 and structure; namely primary stream fusible protection device 301 of crossing adopts lamellar; secondary stream fusible protection device 302 of crossing adopts tabular, as long as the rated blowing-current that satisfied secondary crosses stream fusible protection device 302 crosses the rated blowing-current flowing fusible protection device 301 more than primary。
In sum; refer to Fig. 1～Fig. 5; the multistage overcurrent protective device of lithium ion battery that the present embodiment provides is when the over proof blowout current of its fusible electrode ear; such as be short-circuited, big current conditions, this fusible electrode ear plays protective effect to lithium battery because concentrating overheated meeting automatically to fuse。Even if the mechanical protection mechanism failure of inside battery, primary stream fusible protection device 301 of crossing can play protective effect；Even if when primary cross stream fusible protection device 301 be likely to lost efficacy; secondary stream fusible protection device 302 of crossing also can play protective effect; to avoid the performance impact to lithium battery; prevent the dangerous situation such as high temperature or burning from occurring, it is possible to ensure the person and the property safety of user and contact environment。This protection device primary cross stream fusible protection device 301 and secondary cross that stream fusible protection device 302 can be efficient, safe play the protective effect to lithium battery; guarantee the safe and reliable of set of cells link circuit, and then ensure the normal use of power battery pack。
In the present invention, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, for instance, it is possible to it is fixing connection, it is also possible to be removably connect, or integral；Can be mechanically connected, it is also possible to be electrical connection；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, it is possible to be connection or the interaction relationship of two elements of two element internals。For the ordinary skill in the art, it is possible to understand above-mentioned term concrete meaning in the present invention as the case may be。
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature it " on " or D score can include the first and second features and directly contact, it is also possible to include the first and second features and be not directly contact but by the other characterisation contact between them。And, fisrt feature second feature " on ", " top " and " above " include fisrt feature directly over second feature and oblique upper, or be merely representative of fisrt feature level height higher than second feature。Fisrt feature second feature " under ", " lower section " and " below " include fisrt feature immediately below second feature and obliquely downward, or be merely representative of fisrt feature level height less than second feature。
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations。All within the spirit and principles in the present invention, any amendment of making, equivalent replacement, improvement etc., should be included within protection scope of the present invention。
Claims (10)
1. the multistage overcurrent protective device of lithium ion battery, it is characterised in that including battery cell, collector plate and at least two and cross stream fusible protection device, described battery cell is connected by described stream fusible protection device of crossing with described collector plate。
2. the multistage overcurrent protective device of lithium ion battery according to claim 1; it is characterized in that; each described stream fusible protection device of crossing all includes device body and fusible electrode ear; described fusible electrode ear is arranged on described device body, and described battery cell is connected with described collector plate by described device body and described fusible electrode ear。
3. the multistage overcurrent protective device of lithium ion battery according to claim 2; it is characterized in that; the fusible electrode ear crossing stream fusible protection device near described battery cell is connected with described battery cell, and this device body crossing stream fusible protection device connects with adjacent stream fusible protection device of crossing or is connected with described collector plate。
4. the multistage overcurrent protective device of lithium ion battery according to claim 3; it is characterized in that; described device body is tabular; described fusible electrode ear includes fixed part and fuse part; described fixed part is connected by described fuse part with described device body; described fixed part is connected with described battery cell, and described device body is connected with described collector plate。
5. the multistage overcurrent protective device of lithium ion battery according to claim 3; it is characterized in that; described device body is lamellar; described fusible electrode ear includes interconnective stator and fuse link; described stator is connected by described fuse link with described device body; described stator is connected with described battery cell, and described device body is connected with described collector plate。
6. the multistage overcurrent protective device of lithium ion battery according to claim 5, it is characterised in that described device body is U-shaped, the longitudinal section camber of described fuse link。
7. the multistage overcurrent protective device of lithium ion battery according to claim 3; it is characterized in that; described stream fusible protection device of crossing is two; respectively primary stream fusible protection device and the secondary stream fusible protection device of crossing crossed, the described secondary rated blowing-current crossing stream fusible protection device is more than the described primary rated blowing-current crossing stream fusible protection device。
8. the multistage overcurrent protective device of lithium ion battery according to claim 7; it is characterized in that; described primary stream fusible of crossing protects device and described one of them mistake in stream fusible protection device secondary to be connected with the positive pole of described battery cell, and another is connected with the negative pole of described battery cell。
9. the multistage overcurrent protective device of lithium ion battery according to claim 7, it is characterized in that, described primary stream fusible of crossing protects device and described secondary stream fusible protection device of crossing to be arranged at the negative or positive electrode of described battery cell simultaneously, described primary stream fusible of crossing protects device and described secondary stream fusible protection device of crossing to be connected with each other, described primary stream fusible of crossing protects device and the described secondary fusible electrode ear of one of them crossed in stream fusible protection device to be connected with described battery cell, and another device body is connected with described battery cell。
10. the multistage overcurrent protective device of lithium ion battery according to any one of claim 3-9, it is characterised in that described collector plate is provided with through hole in the position of corresponding described fusible electrode ear。
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| CN201610040722.9A CN105702908B (en) | 2016-01-20 | 2016-01-20 | A kind of lithium ion battery multistage overcurrent protective device |
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| CN201610040722.9A CN105702908B (en) | 2016-01-20 | 2016-01-20 | A kind of lithium ion battery multistage overcurrent protective device |
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| CN105702908A true CN105702908A (en) | 2016-06-22 |
| CN105702908B CN105702908B (en) | 2018-10-19 |
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| CN106921004A (en) * | 2017-01-25 | 2017-07-04 | 安徽江淮汽车集团股份有限公司 | The cold battery module of liquid |
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| Publication number | Publication date |
|---|---|
| CN105702908B (en) | 2018-10-19 |
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Address after: 230000 Anhui Hefei economic and Technological Development Zone, Xin Xin Road, No. 62 power battery factory Applicant after: Huating (Hefei) Power Technology Co., Ltd. Address before: 230000 No. 26, No. 5, Tsing Luen Road, Hefei economic and Technological Development Zone, Anhui Applicant before: Huating (Hefei) Power Technology Co., Ltd. |
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