CN204614848U - Lithium ion battery external short circuit jockey - Google Patents
Lithium ion battery external short circuit jockey Download PDFInfo
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- CN204614848U CN204614848U CN201520300171.6U CN201520300171U CN204614848U CN 204614848 U CN204614848 U CN 204614848U CN 201520300171 U CN201520300171 U CN 201520300171U CN 204614848 U CN204614848 U CN 204614848U
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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 discloses a kind of lithium ion battery external short circuit jockey, it comprises short board and flip piece, short board is electrically connected with the first pole of battery, flip piece be electrically connected with the second pole of battery by the lamina tecti of battery, and flip piece overturns to exist gap and insulated from each other between front and short board; A band in described short board and flip piece is magnetic, and another comprises the conductive magnetism adsorbent that can be attracted by the magnetic force, and is fitted tightly and the face that realizes contacts, make two pole electric connections after the stressed upset of described flip piece by magnetic force with described short board.Compared with prior art, by magnetic force, the utility model lithium ion battery external short circuit jockey ensures that the contact between the flip piece after upset and short board is that face contacts, thus the contact resistance both reducing, avoid external short circuit jockey to be fused because local pyrexia amount is large.
Description
Technical field
The utility model belongs to field of lithium ion battery, and more particularly, the utility model relates to a kind of lithium ion battery external short circuit jockey.
Background technology
Lithium ion battery, owing to having high-energy, high power capacity and high power, has been used to hybrid vehicle and electric automobile.For the lithium ion battery being used as automobile power source, its fail safe is the most important thing, and overcharging test is exactly one of lithium ion battery three safety tests the most extreme.
Because lithium ion battery has high-energy and high activity, therefore often there is Fire explosion when overcharging in it, such as ternary material battery etc.At present, lithium ion battery to overcharge test major part be utilize external short circuit principle, by battery core external short circuit before battery is out of control, to avoid the sharply heat production and cause out of control of battery core inside.But existing external short circuit jockey exists the not firm problem of connection, the outside be easy to when there is short circuit connects the situation of just point cantact or localized contact, and this can make contact resistance excessive, causes external short circuit jockey to fuse because local pyrexia amount is large.
Utility model content
The purpose of this utility model is: provide a kind of safe and reliable lithium ion battery external short circuit jockey, to guarantee that lithium ion battery can realize external short circuit before battery core thermal runaway, avoid the generation of security incident.
In order to realize above-mentioned utility model object, the utility model provides a kind of lithium ion battery external short circuit jockey, it comprises short board and flip piece, short board is electrically connected with the first pole of battery, flip piece be electrically connected with the second pole of battery by the lamina tecti of battery, and flip piece overturns to exist gap and insulated from each other between front and short board; A band in described short board and flip piece is magnetic, and another comprises the conductive magnetism adsorbent that can be attracted by the magnetic force, and is fitted tightly and the face that realizes contacts, make two pole electric connections after the stressed upset of described flip piece by magnetic force with described short board.
One as the utility model lithium ion battery external short circuit jockey is improved, and described short board comprises the pole brace be electrically connected with the first pole and the boss be fixed on pole brace, and boss protrudes towards the battery core direction of battery; Described flip piece comprises the rotating sheet protruded towards battery core direction and the projection being positioned at rotating sheet center, and rotating sheet is electrically connected with lamina tecti, and projection protrudes towards the direction away from battery core and aligns with the boss center of short board.
One as the utility model lithium ion battery external short circuit jockey is improved, and described projection is plane away from the end face of battery core one end, and boss is plane towards the end face of battery core one end.
One as the utility model lithium ion battery external short circuit jockey is improved, and the projection of described flip piece is conductive magnet, or flip piece comprises the magnet be fixed on projection; The boss of short board is the conductive magnetism adsorbent that can be attracted by the magnetic force.
One as the utility model lithium ion battery external short circuit jockey is improved, magnet fixing on described projection is magnetic rings or magnetic piece, magnetic rings is set in the outer surface of projection away from battery core one end, and magnetic piece is embedded in the groove offered away from battery core one end end face at projection.
One as the utility model lithium ion battery external short circuit jockey is improved, and magnet fixing on described projection is directly be fixed on projection away from the electroconductive magnetic sheet on the end face of battery core one end, and electroconductive magnetic sheet is plane away from the end face of battery core one end.
One as the utility model lithium ion battery external short circuit jockey is improved, and the boss of described short board is conductive magnet, or short board comprises the magnet be fixed on boss; The projection of flip piece is the conductive magnetism adsorbent that can be attracted by the magnetic force.
One as the utility model lithium ion battery external short circuit jockey is improved, magnet fixing on described boss is magnetic piece or magnetic rings, magnetic rings is set in the outer surface of boss towards battery core one end, and magnetic piece is embedded to be offered in groove towards battery core one end end face at boss.
One as the utility model lithium ion battery external short circuit jockey is improved, and magnet fixing on described boss is directly be fixed on boss towards the electroconductive magnetic sheet on the end face of battery core one end, and electroconductive magnetic sheet is plane towards the end face of battery core one end.
One as the utility model lithium ion battery external short circuit jockey is improved, and described short board comprises the pole brace be electrically connected with the first pole; Described flip piece comprises the rotating sheet protruded towards battery core direction and the projection being positioned at rotating sheet center, and rotating sheet is electrically connected with lamina tecti, and projection protrudes towards the direction away from battery core and aims at short board; Pole brace is conductive magnet, or has electroconductive magnetic layer at the pole brace Surface coating alignd with the projection of rotating sheet; Projection is the conductive magnetism adsorbent that can be attracted by the magnetic force.
One as the utility model lithium ion battery external short circuit jockey is improved, and described short board comprises the pole brace be electrically connected with the first pole; Described flip piece comprises the rotating sheet protruded towards battery core direction and the projection being positioned at rotating sheet center, and rotating sheet is electrically connected with lamina tecti, and projection protrudes towards the direction away from battery core and aims at short board; Pole brace is the conductive magnetism adsorbent that can be attracted by the magnetic force; Projection is conductive magnet.
Compared with prior art, by magnetic force, the utility model lithium ion battery external short circuit jockey ensures that the contact between the flip piece after upset and short board is that face contacts, thus the contact resistance both reducing, avoid external short circuit jockey to be fused because local pyrexia amount is large.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model lithium ion battery external short circuit jockey and beneficial effect thereof are described in detail.
Fig. 1 is the mounting structure schematic diagram of the utility model lithium ion battery external short circuit jockey and battery cap plate.
Fig. 2 is the enlarged drawing of part A in Fig. 1.
Fig. 3 is the structural representation of the utility model lithium ion battery external short circuit jockey second embodiment.
Fig. 4 is the structural representation of the utility model lithium ion battery external short circuit jockey the 3rd embodiment.
Fig. 5 is the structural representation of the utility model lithium ion battery external short circuit jockey the 4th embodiment.
Fig. 6 is the structural representation of the utility model lithium ion battery external short circuit jockey the 5th embodiment.
Embodiment
In order to make the purpose of this utility model, technical scheme and Advantageous Effects thereof more clear, below in conjunction with the drawings and specific embodiments, the utility model is further elaborated.Should be understood that, the specific embodiment described in this specification is only used to explain the utility model, is not intended to limit the utility model.
Refer to Fig. 1 and Fig. 2, use the lithium ion battery of the utility model lithium ion battery external short circuit jockey to comprise battery core (not shown), lamina tecti 20, first pole 22, second pole 24 and external short circuit jockey 30.First pole 22 and lamina tecti 20 electric insulation, the second pole 24 is electrically connected with lamina tecti 20; Lamina tecti 20 offers liquid injection hole 25 and perforation 26.
First embodiment of the utility model lithium ion battery external short circuit jockey 30 comprises short board and flip piece.Short board comprises pole brace 42 and boss 44.Pole brace 42 is arranged on the side surface of lamina tecti 20 away from battery core, and it entangles the periphery wall of the first pole 22 and is electrically connected with the first pole 22; Boss 44 passes through welding, riveted joint, machinery coordinates or splicing is fixed on the surface of pole brace 42 towards battery core side, and aligns with the perforation 26 of lamina tecti 20.Pole brace 42 and boss 44 are insulated by insulation spacer 50 or other insulation systems and lamina tecti 20.
Flip piece is arranged in the perforation 26 of lamina tecti 20, and it comprises rotating sheet 62 and projection 64.Rotating sheet 62 is the disk that middle part is protruded towards battery core direction, and its edge is fixed on lamina tecti 20 by welding, machinery cooperation or splicing and is electrically connected with lamina tecti 20 towards a side surface of battery core.Projection 64 is positioned at the center of rotating sheet 62, and it aligns with boss 44 center of short board, and protrudes towards the direction away from battery core and stretch in the perforation 26 of lamina tecti 20; Projection 64 is plane away from the end face of battery core one end.Projection 64 can be cylinder, also can be cuboid or other shapes.
In the embodiment depicted in figure 2, the thickness of projection 64 is preferably 0.2-0.7mm, and the thickness of boss 44 is preferably 0.2-0.5mm, and projection 64 is preferably 0.9-1.0mm away from the end face of battery core one end to boss 44 towards the distance of the end face of battery core one end.The projection 64 of flip piece is conductive magnet, the boss 44 of short board is that (the magnetic suck body in this specification and claim refers to the element or object that can be attracted by the magnetic force to conductive magnetism adsorbent, conductive magnetism adsorbent refers to the magnetic suck body that can conduct electricity), as steel boss; Boss 44 is plane towards the end face of battery core one end.When lithium ion battery is in home and state; the form of rotating sheet 62 is the non-rollover states shown in Fig. 2; now; gap is there is and insulated from each other between projection 64 and boss 44; magnetic force between projection 64 and boss 44 is also smaller; be not enough to impel rotating sheet 62 to overturn, therefore can not there is external short circuit in lithium ion battery.When lithium ion battery overcharges, its battery core inside will sharply generate heat and aerogenesis, and when air pressure is greater than certain value (such as 0.5MPa), rotating sheet 62 will upwards overturn and make projection 64 gradually near boss 44; When gap shrinks between projection 64 and boss 44 is to appropriate value (as 0.4-0.5mm), therebetween magnetic force will play leading role, now even without the promotion of air pressure, rotating sheet 62 also can continue distortion under the pulling of magnetic force, to fit tightly and till the face that realizes contacts until projection 64 with boss 44.So far, the first pole 22 and the second pole 24 realize electric connection via pole brace 42, boss 44, flip piece and lamina tecti 20, and the battery core of lithium ion battery is by external short circuit.
In alternate embodiment embodiment illustrated in fig. 2, the magnetic of boss 44 and projection 64 can be exchanged, namely changing boss 44 into is conductive magnet, and the projection 64 of flip piece is conductive magnetism adsorbent.
Refer to Fig. 3, second embodiment of the utility model lithium ion battery external short circuit jockey 30 also comprises short board and flip piece, being distinguished as of this embodiment and the first embodiment: flip piece also comprises the magnetic rings 66a being set in projection 64a outer surface by interference fit, magnetic rings 66a be plane away from the end face of battery core one end and with the end face of projection 64a away from battery core one end; Because magnetic rings 66a serves the effect providing magnetic force, therefore projection 64a common conductive material is made, and no longer require it is magnet, material is preferably aluminium.Magnetic rings 66a can be made up of the magnetic material conducting electricity, and also can be made up of nonconducting magnetic material; The thickness of magnetic rings 66a is preferably 0.2-0.4mm.
In alternate embodiment embodiment illustrated in fig. 3, can also change into and magnetic rings 66a is set on boss 44a by interference fit, that is, magnetic rings 66a is set in the outer surface of boss 44a, magnetic rings 66a towards the end face of battery core one end be plane and with the end face of boss 44a towards battery core one end; Projection 64a is conductive magnetism adsorbent, and its material is preferably steel.
Refer to Fig. 4,3rd embodiment of the utility model lithium ion battery external short circuit jockey 30 also comprises short board and flip piece, being distinguished as of this embodiment and the first embodiment: flip piece also comprises and is fixed on the electroconductive magnetic sheet 66b of projection 64b away from battery core one end end face, and electroconductive magnetic sheet 66b aligns with boss 44b center; Because electroconductive magnetic sheet 66b serves the effect providing magnetic force, therefore projection 64b common conductive material is made, and no longer requires it is magnet.Certainly, consider the thickness of electroconductive magnetic sheet 66b, the thickness of projection 64b needs there is suitable reduction than the first embodiment, before ensureing flip piece upset, there is gap and keep electric insulation between electroconductive magnetic sheet 66b and boss 44b.
In alternate embodiment embodiment illustrated in fig. 4, can also change into and electroconductive magnetic sheet 66b is fixed on the end face of boss 44b towards battery core one end, in the case, projection 64b changes conductive magnetism adsorbent into, boss 44b then makes with common conductive material, no longer requires it is conductive magnetism adsorbent.
Refer to Fig. 5,4th embodiment of the utility model lithium ion battery external short circuit jockey 30 also comprises short board and flip piece, being distinguished as of this embodiment and the first embodiment: projection 64c is provided with groove away from one end end face of battery core, magnetic piece 66c is fixed in a groove by interference fit or bonding mode, and magnetic piece 66c aligns with boss 44c center.Because magnetic piece 66c serves the effect providing magnetic force, therefore projection 64c common conductive material is made, and no longer require it is magnet, material is preferably aluminium.Magnetic piece 66c can be made up of the magnetic material conducting electricity, and also can be made up of nonconducting magnetic material, the thickness of magnetic piece 66c is preferably 0.2-0.4mm.
In the embodiment shown in fig. 5, because projection 64c is provided with groove away from one end end face of battery core, magnetic piece 66c is fixed in a groove by interference fit or bonding mode, and projection 64c can aluminium, therefore can alleviate the weight of flip piece, thus improve the upset sensitivity of rotating sheet 62c.
In alternate embodiment embodiment illustrated in fig. 5, can change into, at boss 44c, groove is set towards the end face of battery core one end, magnetic piece 66c by interference fit or bonding mode fixing in a groove; In the case, boss 44c common conductive material is made, and no longer require it is conductive magnetism adsorbent, but projection 64c needs to be conductive magnetism adsorbent, material is preferably steel.
In above-mentioned all embodiments, can realize between projection with boss stablizing under the effect of magnetic force, rigid contact is connected, thus ensures the firm electrical connection of the utility model lithium ion battery external short circuit jockey 30.Meanwhile, be all plane away from the end face of battery core one end and boss towards the end face of battery core one end due to projection, face contact when therefore projection contacts with boss, can be realized.Compared with point cantact or localized contact, the contact resistance of face contact is little, thus can avoid the generation because local caloric value during overcurrent makes rotating sheet fuse greatly.
Refer to Fig. 6,5th embodiment of the utility model lithium ion battery external short circuit jockey 30 also comprises short board and flip piece, being distinguished as of this embodiment and the first embodiment: short board does not arrange boss, but directly pole brace 42d is made conductive magnet, and the projection 64d of flip piece is made as conductive magnetism adsorbent.The mode that pole brace 42d makes conductive magnet is had a variety of, such as, directly can adopt and make pole brace through magnetized steel, the position coated with conductive magnetosphere 44d that also can align with projection 64d at pole brace 42d.Projection 64d is preferably 0.9-1.0mm away from the end face of battery core one end to pole brace 42d towards the distance of the end face of battery core one end.
In alternate embodiment embodiment illustrated in fig. 6, can also change pole brace 42d into is the conductive magnetism adsorbent that can be attracted by the magnetic force, and its material is preferably steel; Projection 64d is conductive magnet.
In sum, a band in the short board of the utility model lithium ion battery external short circuit jockey 30 and flip piece is magnetic, another then comprises the conductive magnetism adsorbent that can be attracted by the magnetic force, therefore can be fitted tightly with short board by magnetic force after flip piece upset and the face that realizes contacts, thus reduction contact resistance, avoid external short circuit jockey 30 to be fused because local pyrexia amount is large.
The announcement of book and instruction according to the above description, the utility model those skilled in the art can also carry out suitable change and amendment to above-described embodiment.Therefore, the utility model is not limited to specific embodiment disclosed and described above, also should fall in the protection range of claim of the present utility model modifications and changes more of the present utility model.In addition, although employ some specific terms in this specification, these terms just for convenience of description, do not form any restriction to the utility model.
Claims (11)
1. a lithium ion battery external short circuit jockey, it comprises short board and flip piece, short board is electrically connected with the first pole of battery, and flip piece be electrically connected with the second pole of battery by the lamina tecti of battery, and flip piece overturns to exist gap and insulated from each other between front and short board; It is characterized in that: a band in described short board and flip piece is magnetic, another comprises the conductive magnetism adsorbent that can be attracted by the magnetic force, fitted tightly with described short board by magnetic force after the stressed upset of described flip piece and the face that realizes contacts, make two pole electric connections.
2. lithium ion battery external short circuit jockey according to claim 1, is characterized in that: described short board comprises the pole brace be electrically connected with the first pole and the boss be fixed on pole brace, and boss protrudes towards the battery core direction of battery; Described flip piece comprises the rotating sheet protruded towards battery core direction and the projection being positioned at rotating sheet center, and rotating sheet is electrically connected with lamina tecti, and projection protrudes towards the direction away from battery core and aligns with the boss center of short board.
3. lithium ion battery external short circuit jockey according to claim 2, is characterized in that: described projection is plane away from the end face of battery core one end, and boss is plane towards the end face of battery core one end.
4. the lithium ion battery external short circuit jockey according to Claims 2 or 3, is characterized in that: the projection of described flip piece is conductive magnet, or flip piece comprises the magnet be fixed on projection; The boss of short board is the conductive magnetism adsorbent that can be attracted by the magnetic force.
5. lithium ion battery external short circuit jockey according to claim 4, it is characterized in that: magnet fixing on described projection is magnetic rings or magnetic piece, magnetic rings is set in the outer surface of projection away from battery core one end, and magnetic piece is embedded in the groove offered away from battery core one end end face at projection.
6. lithium ion battery external short circuit jockey according to claim 4, it is characterized in that: magnet fixing on described projection is directly be fixed on projection away from the electroconductive magnetic sheet on the end face of battery core one end, and electroconductive magnetic sheet is plane away from the end face of battery core one end.
7. the lithium ion battery external short circuit jockey according to Claims 2 or 3, is characterized in that: the boss of described short board is conductive magnet, or short board comprises the magnet be fixed on boss; The projection of flip piece is the conductive magnetism adsorbent that can be attracted by the magnetic force.
8. lithium ion battery external short circuit jockey according to claim 7, it is characterized in that: magnet fixing on described boss is magnetic piece or magnetic rings, magnetic rings is set in the outer surface of boss towards battery core one end, and magnetic piece is embedded to be offered in groove towards battery core one end end face at boss.
9. lithium ion battery external short circuit jockey according to claim 7, it is characterized in that: magnet fixing on described boss is directly be fixed on boss towards the electroconductive magnetic sheet on the end face of battery core one end, and electroconductive magnetic sheet is plane towards the end face of battery core one end.
10. lithium ion battery external short circuit jockey according to claim 1, is characterized in that: described short board comprises the pole brace be electrically connected with the first pole; Described flip piece comprises the rotating sheet protruded towards battery core direction and the projection being positioned at rotating sheet center, and rotating sheet is electrically connected with lamina tecti, and projection protrudes towards the direction away from battery core and aims at short board; Pole brace is conductive magnet, or has electroconductive magnetic layer at the pole brace Surface coating alignd with the projection of rotating sheet; Projection is the conductive magnetism adsorbent that can be attracted by the magnetic force.
11. lithium ion battery external short circuit jockeys according to claim 1, is characterized in that: described short board comprises the pole brace be electrically connected with the first pole; Described flip piece comprises the rotating sheet protruded towards battery core direction and the projection being positioned at rotating sheet center, and rotating sheet is electrically connected with lamina tecti, and projection protrudes towards the direction away from battery core and aims at short board; Pole brace is the conductive magnetism adsorbent that can be attracted by the magnetic force; Projection is conductive magnet.
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| CN201520300171.6U CN204614848U (en) | 2015-05-11 | 2015-05-11 | Lithium ion battery external short circuit jockey |
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Address after: 352100 Jiaocheng District of Ningde City, Fujian Province Zhang Wan Zhen Xingang Road No. 1 Patentee after: Contemporary Amperex Technology Co.,Ltd. Address before: 352100 Jiaocheng District of Ningde City, Fujian Province Zhang Wan Zhen Xingang Road No. 1 West Building 1F- research Patentee before: CONTEMPORARY AMPEREX TECHNOLOGY Ltd. |