CN104716289A - Safety protective structure for lithium battery module - Google Patents
Safety protective structure for lithium battery module Download PDFInfo
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- CN104716289A CN104716289A CN201510115719.4A CN201510115719A CN104716289A CN 104716289 A CN104716289 A CN 104716289A CN 201510115719 A CN201510115719 A CN 201510115719A CN 104716289 A CN104716289 A CN 104716289A
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- lithium battery
- battery module
- bar
- bus
- safety protection
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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 invention provides a safety protective structure for a lithium battery module. The lithium battery module comprises a first battery core and a second battery core, which are connected in series or in parallel; the safety protective structure comprises a busbar arranged above the lithium battery module, wherein a first end of the busbar is coupled with an electrode of the first battery core, and a second end of the busbar is coupled with an electrode of the second battery core; the busbar stretches across a pressure release valve or the sides of the pressure release valve; when the pressure release valve acts due to internal pressure of the battery cores, the busbar is fused by a high-temperature high-pressure gas or a high-temperature high-pressure solid. Compared with the prior art, according to the safety protective structure disclosed by the invention, a high-conductivity low-melting-point metal or a metal alloy can be used as the busbar; the necessary safety pressure release valve is utilized and integrated with other monitoring components and protective components to provide effective safety protection and disconnection protection; when the pressure release valve acts due to expanded internal pressure in the battery cores, the busbar above is fused by the generated high-temperature high-pressure gas or solid, so that a complete open circuit can be formed at the series and/or parallel connection structure between the battery packs.
Description
Technical field
The present invention relates to a kind of lithium battery module, particularly relate to a kind of safety protection structure for this lithium battery module.
Background technology
Lithium battery is a class is negative material by lithium metal or lithium alloy, uses the battery of non-aqueous electrolytic solution.Because the chemical characteristic of lithium metal is very active, make the processing of lithium metal, preservation, use, very high to environmental requirement.Along with the development of science and technology, present lithium battery becomes main flow.
In general, in order to avoid causing battery over-discharge or overcharge because of improper use, at monomer lithium ion battery (such as, the lithium battery of cylinder type) in be provided with triple protection mechanism: one be adopt switch element, when the temperature in battery rises, its positive temperature coefficient (positive temperaturecoefficient) resistance rises thereupon, when temperature is too high, can automatically stop power supply to suppress short circuit current to occur; Two is select suitable separator material, and when temperature rises to certain numerical value, the micron order micropore on dividing plate can be taken off by automatic dissolving, thus make lithium ion not by, inside battery reaction stops; Three is arrange safety relief valve (pressure release valve), and when cell internal pressure rises to certain numerical value, relief valve is automatically opened thus derived by the pressure of inside battery, to ensure the safety in utilization of battery.Lithium battery group is multiple battery core compositions of series/parallel, voltage as notebook computer is more than 10V, and capacity is comparatively large, generally adopts 3 ~ 4 cells in series just can meet voltage request, and then by parallel for 2 ~ 3 battery pack of connecting, to ensure larger capacity.Similarly, battery pack mainly prevents battery overcharge, overdischarge, excess temperature, overcurrent and fuse protection through power-supply management system (Battery Management System, BMS); Also can arrange the pressure sensor being fixed on battery core body surface, when battery core causes case swells extremely, pressure sensor produces signal and is protected further.
But; in the prior art; be different from cylinder type 18650 battery; the lithium battery of large scale, high power capacity does not have PTC or CID (Current Interruption Device; failure of current device) etc. be integrated in the safety guard of battery core inside, relief valve is equipped with generally only.Battery core inside is caused to produce high temperature when battery generation internal short-circuit is abnormal; although can protection be obtained through temperature detecting or relief valve; but the string between battery pack structure are not opened a way completely; thus may continue to maintain charging and discharging circuit; make battery pack still be in the environment of sustainable discharge and recharge, cause larger safety problem.
In view of this, how to design the safety protection structure that one is applicable to large scale square-type lithium battery module (prismatic cellmodule), to solve above-mentioned defect of the prior art or deficiency, it is the problem that person skilled is urgently to be resolved hurrily in the industry.
Summary of the invention
For the above-mentioned defect existing for large scale square-type lithium battery module of the prior art, the invention provides a kind of novelty, the safety protection structure of lithium battery module.
According to one aspect of the present invention, provide a kind of safety protection structure of lithium battery module, described lithium battery module comprises one first battery core connected in series or in parallel and one second battery core, and this safety protection structure comprises:
One bus-bar, is arranged on the top of described lithium battery module, and described bus-bar has a first end and one second end, and described first end is electrically coupled to the electrode of described first battery core, and described second end is electrically coupled to the electrode of described second battery core,
Wherein, described bus-bar is also across top or the side of relief valve, and when described relief valve acts on because of battery core internal pressure, described bus-bar fuses thus realizes open circuit protection by the high temperature and high pressure gas of generation or solid.
An embodiment wherein, described bus-bar is the metal or metal alloy of high connductivity, low melting point.
An embodiment wherein, described bus-bar is U-shaped structure, it comprises a first side, a junction and a second side, wherein, described first side and described second side are electrically coupled to the electrode of described first battery core and the electrode of described second battery core respectively, and described connecting portion is between described first side and described second side.
An embodiment wherein, the lower surface of described connecting portion has indentation or groove.
An embodiment wherein, described safety protection structure also comprises a pressure sensitive device, is positioned at the lower surface of described connecting portion, and when described relief valve effect, the high temperature and high pressure gas of generation makes the start of pressure sensitive device to carry out safeguard protection.
An embodiment wherein, described first side and described second side are the first metal alloy material, and described connecting portion is the second metal alloy material, and described second metal alloy material is different from described first metal alloy material.
An embodiment wherein, described connecting portion also offers multiple hole, is positioned at directly over described relief valve to increase the breakdown point of bus-bar fusing.
An embodiment wherein, described bus-bar also comprises V-type groove, is arranged on the position, boundary of described first side and described connecting portion, and/or the position, boundary of described second side and described connecting portion.
An embodiment wherein, described bus-bar comprises multiple V-type groove, is arranged at intervals at the upper surface of described bus-bar.
An embodiment wherein, described bus-bar is fixed with screw locking or riveting method.
Adopt the safety protection structure of lithium battery module of the present invention; its bus-bar is arranged on the top of lithium battery module; the first end of bus-bar is electrically coupled to the electrode of the first battery core; second end of bus-bar is electrically coupled to the electrode of the second battery core; bus-bar is across top or the side of relief valve; when relief valve acts on because of battery core internal pressure, bus-bar fuses thus realizes open circuit protection by the high temperature and high pressure gas of generation or solid.Compared to prior art, the present invention can adopt the metal or metal alloy of high connductivity, low melting point as bus-bar, utilizes indispensable safety relief valve and integrates other monitoring assemblies, protection assembly to provide effective security protection and open circuit protection.When relief valve acts on because battery core internal pressure expands, the bus-bar of top fuses by the high temperature and high pressure gas of generation or solid, and the series connection between battery pack and/or parallel-connection structure are opened a way completely.
Accompanying drawing explanation
Reader, after having read the specific embodiment of the present invention with reference to accompanying drawing, will become apparent various aspects of the present invention.Wherein,
Fig. 1 illustrates the first embodiment of the safety protection structure of lithium battery module of the present invention;
Fig. 2 A illustrates the second embodiment of the safety protection structure of lithium battery module of the present invention;
Fig. 2 B illustrates that the lower surface of the safety protection structure of Fig. 2 A comprises the schematic diagram of groove;
Fig. 3 illustrates the 3rd embodiment of the safety protection structure of lithium battery module of the present invention;
Fig. 4 illustrates the 4th embodiment of the safety protection structure of lithium battery module of the present invention;
Fig. 5 illustrates the 5th embodiment of the safety protection structure of lithium battery module of the present invention;
Fig. 6 illustrates the 6th embodiment of the safety protection structure of lithium battery module of the present invention; And
Fig. 7 illustrates the 7th embodiment of the safety protection structure of lithium battery module of the present invention.
Embodiment
The technology contents disclosed to make the application is more detailed and complete, and can refer to accompanying drawing and following various specific embodiment of the present invention, mark identical in accompanying drawing represents same or analogous assembly.But those of ordinary skill in the art should be appreciated that hereinafter provided embodiment is not used for limiting the scope that contains of the present invention.In addition, accompanying drawing, only for being schematically illustrated, is not drawn according to its life size.
With reference to the accompanying drawings, the embodiment of various aspects of the present invention is described in further detail.
Fig. 1 illustrates the first embodiment of the safety protection structure of lithium battery module of the present invention.With reference to Fig. 1, this lithium battery module 1 comprises one first battery core 10 and one second battery core 20 connected in series or in parallel.Safety protection structure of the present invention comprises a bus-bar 32.Bus-bar 32 is arranged on the top of lithium battery module 1.Bus-bar 32 has a first end and one second end, and its first end is electrically coupled to the electrode (such as, positive pole P) of the first battery core 10, and the second end is electrically coupled to the electrode (such as, negative pole N) of the second battery core 12.And; bus-bar 32 is also across top or the side of relief valve (pressure release valve) 30; thus; when relief valve 30 acts on because battery core internal pressure expands, bus-bar 32 fuses thus realizes the complete open-circuit-protection of lithium battery module 1 by the high temperature and high pressure gas of generation or solid.
In one embodiment, bus-bar 32 is the metal or metal alloy of high connductivity, low melting point.Such as, the fusing point of metal is between 100 degrees Celsius to 150 degrees Celsius.
In one embodiment, bus-bar 32 is fixed to lithium battery module 1 with screw locking or riveting method.
From the above; the present invention adopts the metal or metal alloy of high connductivity, low melting point as bus-bar; when battery core internal pressure is excessive; only safety relief valve 30 is utilized to produce the gas of HTHP or bus-bar 32 fuses by solid; series connection between lithium battery module and/or parallel-connection structure are opened a way completely, and then realizes security protection and open circuit protection.
Fig. 2 A illustrates the second embodiment of the safety protection structure of lithium battery module of the present invention.Fig. 2 B illustrates that the lower surface of the safety protection structure of Fig. 2 A comprises the schematic diagram of groove.
With reference to Fig. 2 A and Fig. 2 B, it is be relative to the main distinction of Fig. 1, and the lower surface of bus-bar 32 has indentation or groove G.Specifically, bus-bar 32 is U-shaped structure, it comprise a first side (as, horizontal bar by the top in Fig. 2 A), a junction (as, vertical bar in Fig. 2 A) and a second side (as, horizontal bar on the lower in Fig. 2 A), connecting portion is between first side and second side.Wherein, first side is electrically coupled to the electrode P of the first battery core 10, and second side is electrically coupled to the electrode N of the second battery core 12.Easy understand, when relief valve 30 produces gas or the solid of HTHP, the bus-bar 32 with indentation or groove more easily fuses and forms open circuit.
Fig. 3 illustrates the 3rd embodiment of the safety protection structure of lithium battery module of the present invention.With reference to Fig. 3, it is be relative to the main distinction of Fig. 1, and this safety protection structure also comprises a pressure sensitive device 34.Pressure sensitive device 34 is positioned at the lower surface of connecting portion, and it is also connected to control module by pressure sensitive holding wire L1 and L2.When relief valve 30 acts on because of battery core internal pressure, the high temperature and high pressure gas of generation makes pressure sensitive device 34 start carry out safeguard protection with auxiliary.
Fig. 4 illustrates the 4th embodiment of the safety protection structure of lithium battery module of the present invention.With reference to Fig. 4, it is be relative to the main distinction of Fig. 1, and bus-bar 32 is U-shaped structure, and it comprises a first side 361, a junction 362 and a second side 363, and connecting portion 362 is between first side 361 and second side 363.And connecting portion 362 also offers multiple hole 364, be positioned at directly over relief valve 30 to increase the breakdown point that bus-bar 32 fuses.Such as, hole 364 is arranged in a rectangular array, and adjacent hole keeps at a certain distance away but is not communicated with mutually.
Fig. 5 illustrates the 5th embodiment of the safety protection structure of lithium battery module of the present invention.With reference to Fig. 5, it is be relative to the main distinction of Fig. 1, first side 461 and second side 463 are the first metal alloy material, and connecting portion 462 is the second metal alloy material (as shown in Fig. 5 oblique line portion), and the second metal alloy material is different from the first metal alloy material.
Fig. 6 illustrates the 6th embodiment of the safety protection structure of lithium battery module of the present invention.With reference to Fig. 6, in this embodiment, bus-bar 32 also comprises V-type groove V1, is arranged on the position, boundary of first side 361 and connecting portion 362, and/or the position, boundary of second side 363 and connecting portion 362.
Fig. 7 illustrates the 7th embodiment of the safety protection structure of lithium battery module of the present invention.With reference to Fig. 7, in this embodiment, bus-bar 32 comprises multiple V-type groove, is arranged at intervals at the upper surface of bus-bar 32.Such as, in the figure 7, first side 361 is provided with V-type groove V2 with the position, boundary of connecting portion 362, and connecting portion 362 is provided with the V-type groove V3 at multiple interval.Thus, when relief valve 30 produces gas or the solid of HTHP, bus-bar 32 can be allowed more easily to fuse at the V-type groove of multiple diverse location and form open circuit.
Adopt the safety protection structure of lithium battery module of the present invention; its bus-bar is arranged on the top of lithium battery module; the first end of bus-bar is electrically coupled to the electrode of the first battery core; second end of bus-bar is electrically coupled to the electrode of the second battery core; bus-bar is across top or the side of relief valve; when relief valve acts on because of battery core internal pressure, bus-bar fuses thus realizes open circuit protection by the high temperature and high pressure gas of generation or solid.Compared to prior art, the present invention can adopt the metal or metal alloy of high connductivity, low melting point as bus-bar, utilizes indispensable safety relief valve and integrates other monitoring assemblies, protection assembly to provide effective security protection and open circuit protection.When relief valve acts on because battery core internal pressure expands, the bus-bar of top fuses by the high temperature and high pressure gas of generation or solid, and the series connection between battery pack and/or parallel-connection structure are opened a way completely.
Above, the specific embodiment of the present invention is described with reference to the accompanying drawings.But those skilled in the art can understand, when without departing from the spirit and scope of the present invention, various change and replacement can also be done to the specific embodiment of the present invention.These change and replace and all drop in claims of the present invention limited range.
Claims (10)
1. a safety protection structure for lithium battery module, described lithium battery module comprises one first battery core connected in series or in parallel and one second battery core, and it is characterized in that, this safety protection structure comprises:
One bus-bar, is arranged on the top of described lithium battery module, and described bus-bar has a first end and one second end, and described first end is electrically coupled to the electrode of described first battery core, and described second end is electrically coupled to the electrode of described second battery core,
Wherein, described bus-bar is also across top or the side of relief valve, and when described relief valve acts on because of battery core internal pressure, described bus-bar fuses thus realizes open circuit protection by the high temperature and high pressure gas of generation or solid.
2. the safety protection structure of lithium battery module according to claim 1, is characterized in that, described bus-bar is the metal or metal alloy of high connductivity, low melting point.
3. the safety protection structure of lithium battery module according to claim 1, it is characterized in that, described bus-bar is U-shaped structure, it comprises a first side, a junction and a second side, wherein, described first side and described second side are electrically coupled to the electrode of described first battery core and the electrode of described second battery core respectively, and described connecting portion is between described first side and described second side.
4. the safety protection structure of lithium battery module according to claim 3, is characterized in that, the lower surface of described connecting portion has indentation or groove.
5. the safety protection structure of lithium battery module according to claim 3; it is characterized in that; described safety protection structure also comprises a pressure sensitive device; be positioned at the lower surface of described connecting portion; when described relief valve effect, the high temperature and high pressure gas of generation makes the start of pressure sensitive device to carry out safeguard protection.
6. the safety protection structure of lithium battery module according to claim 3, it is characterized in that, described first side and described second side are the first metal alloy material, and described connecting portion is the second metal alloy material, and described second metal alloy material is different from described first metal alloy material.
7. the safety protection structure of lithium battery module according to claim 3, is characterized in that, described connecting portion also offers multiple hole, is positioned at directly over described relief valve to increase the breakdown point of bus-bar fusing.
8. the safety protection structure of lithium battery module according to claim 3, it is characterized in that, described bus-bar also comprises V-type groove, is arranged on the position, boundary of described first side and described connecting portion, and/or the position, boundary of described second side and described connecting portion.
9. the safety protection structure of lithium battery module according to claim 1, is characterized in that, described bus-bar comprises multiple V-type groove, is arranged at intervals at the upper surface of described bus-bar.
10. the safety protection structure of lithium battery module according to claim 1, is characterized in that, described bus-bar is fixed with screw locking or riveting method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510115719.4A CN104716289A (en) | 2015-03-17 | 2015-03-17 | Safety protective structure for lithium battery module |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510115719.4A CN104716289A (en) | 2015-03-17 | 2015-03-17 | Safety protective structure for lithium battery module |
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| CN104716289A true CN104716289A (en) | 2015-06-17 |
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| CN201510115719.4A Pending CN104716289A (en) | 2015-03-17 | 2015-03-17 | Safety protective structure for lithium battery module |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107123784A (en) * | 2016-02-25 | 2017-09-01 | 比亚迪股份有限公司 | Cell, battery modules, electrokinetic cell and electric automobile |
| CN107123783A (en) * | 2016-02-25 | 2017-09-01 | 比亚迪股份有限公司 | Cell, battery modules, electrokinetic cell and electric automobile |
| CN108075053A (en) * | 2016-11-08 | 2018-05-25 | 三星Sdi株式会社 | Rechargeable battery bag |
| WO2018135727A1 (en) * | 2017-01-23 | 2018-07-26 | 삼성에스디아이(주) | Manual service disconnect for battery system |
| CN108767181A (en) * | 2018-07-12 | 2018-11-06 | 珠海格力精密模具有限公司 | Conduction connecting structure and battery case |
| US20200075926A1 (en) * | 2018-08-29 | 2020-03-05 | International Business Machines Corporation | Battery pack system with integrated battery disconnect mechanism |
| CN110915025A (en) * | 2018-02-09 | 2020-03-24 | 株式会社Lg化学 | Bus bar provided with current interrupt portion and battery module including the same |
| WO2020103716A1 (en) * | 2018-11-19 | 2020-05-28 | 宁德时代新能源科技股份有限公司 | Battery module and assembly method thereof |
| WO2020220570A1 (en) * | 2019-04-30 | 2020-11-05 | 宁德时代新能源科技股份有限公司 | Battery module and battery pack |
| US10892469B2 (en) * | 2018-07-30 | 2021-01-12 | International Business Machines Corporation | Safety compliant battery cell ejection for packaged battery cells |
| US11158910B2 (en) | 2017-12-05 | 2021-10-26 | Industrial Technology Research Institute | Battery busbar |
| CN117912915A (en) * | 2024-03-15 | 2024-04-19 | 嘉兴模度新能源有限公司 | Composite fuse power-off connection structure and battery pack |
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- 2015-03-17 CN CN201510115719.4A patent/CN104716289A/en active Pending
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| CN107123784B (en) * | 2016-02-25 | 2021-01-08 | 比亚迪股份有限公司 | Single battery, battery module, power battery and electric automobile |
| CN107123783A (en) * | 2016-02-25 | 2017-09-01 | 比亚迪股份有限公司 | Cell, battery modules, electrokinetic cell and electric automobile |
| CN107123784A (en) * | 2016-02-25 | 2017-09-01 | 比亚迪股份有限公司 | Cell, battery modules, electrokinetic cell and electric automobile |
| CN108075053A (en) * | 2016-11-08 | 2018-05-25 | 三星Sdi株式会社 | Rechargeable battery bag |
| WO2018135727A1 (en) * | 2017-01-23 | 2018-07-26 | 삼성에스디아이(주) | Manual service disconnect for battery system |
| US11040623B2 (en) | 2017-01-23 | 2021-06-22 | Samsung Sdi Co., Ltd. | Manual service disconnect for battery system |
| US11158910B2 (en) | 2017-12-05 | 2021-10-26 | Industrial Technology Research Institute | Battery busbar |
| CN110915025B (en) * | 2018-02-09 | 2022-06-24 | 株式会社Lg化学 | Bus bar, battery module including the same, and battery pack including the battery module |
| CN110915025A (en) * | 2018-02-09 | 2020-03-24 | 株式会社Lg化学 | Bus bar provided with current interrupt portion and battery module including the same |
| CN108767181A (en) * | 2018-07-12 | 2018-11-06 | 珠海格力精密模具有限公司 | Conduction connecting structure and battery case |
| US10892469B2 (en) * | 2018-07-30 | 2021-01-12 | International Business Machines Corporation | Safety compliant battery cell ejection for packaged battery cells |
| US10714736B2 (en) | 2018-08-29 | 2020-07-14 | International Business Machines Corporation | Battery pack system with integrated battery disconnect mechanism |
| US20200075926A1 (en) * | 2018-08-29 | 2020-03-05 | International Business Machines Corporation | Battery pack system with integrated battery disconnect mechanism |
| WO2020103716A1 (en) * | 2018-11-19 | 2020-05-28 | 宁德时代新能源科技股份有限公司 | Battery module and assembly method thereof |
| EP3886204A4 (en) * | 2018-11-19 | 2022-04-20 | Contemporary Amperex Technology Co., Limited | Battery module and assembly method thereof |
| US11955663B2 (en) | 2018-11-19 | 2024-04-09 | Contemporary Amperex Technology Co., Limited | Battery module and assembling method thereof |
| WO2020220570A1 (en) * | 2019-04-30 | 2020-11-05 | 宁德时代新能源科技股份有限公司 | Battery module and battery pack |
| US11251500B2 (en) | 2019-04-30 | 2022-02-15 | Contemporary Amperex Technology Co., Limited | Battery module and battery pack |
| CN117912915A (en) * | 2024-03-15 | 2024-04-19 | 嘉兴模度新能源有限公司 | Composite fuse power-off connection structure and battery pack |
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