CN203800141U - Power battery system with thermal runaway protection function - Google Patents
Power battery system with thermal runaway protection function Download PDFInfo
- Publication number
- CN203800141U CN203800141U CN201420208003.XU CN201420208003U CN203800141U CN 203800141 U CN203800141 U CN 203800141U CN 201420208003 U CN201420208003 U CN 201420208003U CN 203800141 U CN203800141 U CN 203800141U
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- electrokinetic cell
- thermal runaway
- cell system
- relay
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 18
- 229910052802 copper Inorganic materials 0.000 claims description 18
- 239000010949 copper Substances 0.000 claims description 18
- 238000009413 insulation Methods 0.000 claims description 12
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 230000000875 corresponding effect Effects 0.000 description 16
- 230000006870 function Effects 0.000 description 7
- 238000012544 monitoring process Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000002596 correlated effect Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000005183 dynamical system Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 239000002966 varnish Substances 0.000 description 2
- 206010014357 Electric shock Diseases 0.000 description 1
- 229910052493 LiFePO4 Inorganic materials 0.000 description 1
- 229910002097 Lithium manganese(III,IV) oxide Inorganic materials 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 238000007619 statistical method Methods 0.000 description 1
Classifications
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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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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Protection Of Static Devices (AREA)
Abstract
The utility model discloses a power battery system with a thermal runaway protection function. The power battery system with the thermal runaway protection function comprises a battery pack composed of at least one battery module, wherein the battery modules are connected in series, single batteries of the battery pack are connected through conductive connecting pieces, and one or at least two conductive connecting pieces at set positions are provided with corresponding temperature controllers. The battery pack is connected with at least one relay in series. A contact of one corresponding temperature controller is connected with a coil of any relay in series, and alternatively contacts of the at least two corresponding temperature controllers are connected with the coil of any relay in series after being connected in series. The power battery system with the thermal runaway protection function comprises the battery pack composed of the battery modules in series and parallel, the temperature controllers are used in cooperation with the relays in a main circuit of the power battery system, and the contacts of the temperature controllers control the coils of the relays. Connection and disconnection of the power battery system are controlled by controlling power supply voltages of the coils, and control over the operating state by the temperature of the power battery system is achieved.
Description
Technical field
The utility model belongs to electrokinetic cell field, is specifically related to a kind of electrokinetic cell system with thermal runaway defencive function.
Background technology
Along with the day by day exhaustion of fossil energy and the raising day by day of environmental requirement, the new-energy automobiles such as growing, electronic/mixed moving big bus of electric automobile and Development of HEV Technology demand and private car are nowadays no longer strange.As the core component in new-energy automobile field, battery technology is directly to concern the key technology whether above-mentioned new-energy automobile can be applied.
Up to now, numerous novel high-energy metric density batteries such as LiFePO4, LiMn2O4, ternary material are progressively there are.Above-mentioned Novel power battery requires in application to have that energy density is high, discharge-rate is high, high-low temperature resistant environment, can bear repeatedly impulsive discharge, many technical characterstics such as have extended cycle life.
Wherein, the security performance of electrokinetic cell system is particularly important.Make a general survey of the new-energy automobile of lot of domestic and foreign model, all occurred repeatedly the accidents such as combustion explosion, the combustion explosion of electrokinetic cell system is battery system thermal runaway as technical problem.Cause the reason of thermal runaway numerous, comprise cell internal short-circuit, external short circuit, push, pierce through, the reason such as ambient temperature.The generation of thermal runaway accident has become a great technical bottleneck of restriction industry development.
Existing thermal runaway scheme is mainly by battery management system (BMS) carries out monitoring temperature to power battery pack, its groundwork principle is for by each point temperature in negative temperature coefficient resister (NTC) perception battery pack, judges whether battery pack temperature arrives critical value after treated.If temperature reaches critical value, battery management system drives the relay/relay in battery pack system to cut off battery pack major loop by communication system, stops battery pack operation.
Prove through practical application, by battery management system, power battery pack is carried out to monitoring temperature, there is following drawback: (1) independence deficiency: power battery pack is carried out to monitoring temperature by battery management system, need to ensure battery management system reliability service, guarantee all normally operations of battery management system power supply, communication, collection, program.Actual accidents analysis is indicated, the equal cisco unity malfunction of thermal runaway accident initial stage battery management system causes battery management system effectively to process thermal runaway accident in time, and then causes thermal runaway fault spread; (2) real-time deficiency: battery management system carries out monitoring temperature in power battery pack running, statistical analysis thermal runaway accident, part thermal runaway accident occur in battery pack out of service during, main cause is to be subject to external environment to affect the external short circuit that causes, push, pierce through.Now, battery management system, in stopped status, cannot carry out limited monitoring to the imminent thermal runaway of battery pack system, causes fault spread.
The above analysis, should meet the technical requirements such as independence, reliability, real-time to the thermal runaway protection of electrokinetic cell system, guarantees that thermal runaway protection system can independently, in real time, reliably monitor electrokinetic cell system and protect.
Utility model content
The purpose of this utility model is to provide a kind of electrokinetic cell system with thermal runaway defencive function, solves and adopts at present battery management system (BMS) to carry out the poor problem of independence, real-time, reliability occurring in monitoring temperature.
In order to realize above object, the technical scheme that the utility model adopts is: a kind of electrokinetic cell system with thermal runaway defencive function, comprise the battery pack of the battery module formation of at least one series connection, the cell of this battery pack connects by conducting connecting part, and the conducting connecting part of or at least two setting positions is provided with corresponding thermostat; Described battery pack is connected in series with at least one relay, and the corresponding contact of a thermostat or the series connection of the contact of at least two thermostats coil rear and any one relay is connected in series.
Described conducting connecting part is insulation copper bar.
Described thermostat is bimetallic thermostat.
On described relay coil, be connected with indicator light.
In this electrokinetic cell system, be in series with at least one isolating switch with fuse.
The electrokinetic cell system that the present invention has thermal runaway defencive function comprises the battery pack that several battery modules adopt series-parallel system to form; the cell of this battery pack connects by conducting connecting part; corresponding thermostat is set on the conducting connecting part of setting position; relay in thermostat and electrokinetic cell system major loop is used in conjunction with, the coil of the contact control relay of thermostat.Supply power voltage by control coil and then control connection and the disjunction of electrokinetic cell system, realizes the control of electrokinetic cell system temperature to running status.
Thermostat adopts bimetallic thermostat, and for detection of electrokinetic cell system multi-point temp, wherein any point temperature reaches after opening temperature, the action of bimetallic thermostat contact; Multiple bimetallic thermostats are installed in electrokinetic cell system, and each metal thermostat adopts and is connected in series, and strengthens the sensitivity of temperature control system.Bimetallic thermostat is mechanical type temperature-sensing element, and without power supply, independence is strong, whole day 24 hours is in running order.
Be subject to the electrokinetic cell system corresponding state of thermostat control protection can be by local light, the HMI instruction of being correlated with.
Connection between each cell is used the naked copper row of insulating varnish processing.Adopt insulation naked copper row can improve the heat dispersion of electrokinetic cell system, simultaneously because copper bar surface is without combustible, can effectively block potential thermal runaway round.
In electrokinetic cell system, connect the isolating switch that contains fuse, reduce the personnel's Danger Electric shock risk in system maintenance process by isolating switch.In addition, several fast acting fuses of series connection in electrokinetic cell system, further reduce the risk that causes thermal runaway because of local external short circuit.
Brief description of the drawings
Fig. 1 is the utility model electrokinetic cell system the first example structure figure;
Fig. 2 is electrokinetic cell system the second example structure figure;
Fig. 3 is control relay circuit the first example structure figure;
Fig. 4 is control relay circuit the second example structure figure;
Fig. 5 is control relay circuit the 3rd example structure figure;
Fig. 6 is control relay circuit the 4th example structure figure;
Fig. 7 is electrokinetic cell system the 3rd example structure figure;
Fig. 8 is electrokinetic cell system the 4th example structure figure;
Fig. 9 is electrokinetic cell system the 5th example structure figure.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment, the utility model is described further.
Be illustrated in figure 1 electrokinetic cell system the first example structure figure that the utlity model has thermal runaway defencive function, it is the electrokinetic cell system of a minimal structure, as seen from the figure, this system comprises the battery pack that the battery module of series connection forms, the cell of this battery pack connects by conducting connecting part, and the conducting connecting part of or at least two setting positions is provided with corresponding thermostat; This battery pack is connected in series with relay K 1 (at least one), and the corresponding contact of a thermostat or the series connection of the contact of at least two thermostats coil rear and any one relay is connected in series.
The thermostat of the present embodiment adopts bimetallic thermostat, is divided into closed type and open type, and disjunction or closing contact after temperature rise reaches critical value, send signal respectively.Bimetallic thermostat opening temperature (critical value) scope is 70 DEG C-150 DEG C, precision ± 3 DEG C.Multiple bimetallic thermostats are installed in electrokinetic cell system, and each metal thermostat adopts and is connected in series, and strengthens the sensitivity of temperature control system.Be that in electrokinetic cell system, any point temperature reaches opening temperature (critical value), disjunction or closure, output signal are carried out in corresponding contact.Bimetallic thermostat is mechanical type temperature-sensing element, and without power supply, independence is strong, whole day 24 hours is in running order.
The conducting connecting part of the present embodiment adopts insulation copper bar to carry out circuit connection, detects copper bar temperature by bimetallic thermostat is installed in some insulation copper bars in electrokinetic cell system (evenly fetch bit is put) surface.Copper bar is connected with level electrokinetic cell before and after battery, and therefore in fact bimetallic thermostat detects front and back level power battery module.Insulation copper bar is the naked copper row who uses insulating varnish processing.Adopt insulation naked copper row can improve the heat dispersion of electrokinetic cell system, simultaneously because copper bar surface is without combustible, can effectively block potential thermal runaway round.Relay adopts the EV200 series of TE company, rated voltage 900V, and rated current 500A, above-mentioned model can meet electrokinetic cell system and flexibly connect use.
Electrokinetic cell system adopts classification flexible connection mode, uses relay to carry out classification connection to electrokinetic cell system.Flexibly connect the safe voltage battery module being divided into up to the high-voltage direct current of hundreds of volts lower than 60VDC, realize the connection to battery module by control relay, voltage and the power of output regulation.
In this electrokinetic cell system, need to be connected in series fuse, fuse can be realized whole group of electrokinetic cell system and over load protection step by step, can be by the protection range of over load the subsystem from electrokinetic cell system integral extension to power battery module, protection range further expands, and effectively reduces the risk that causes thermal runaway because of local external short circuit; In addition, also needing to be connected in series isolating switch and use as manual maintenance switch, is some low-voltage direct battery module subsystems by high-voltage direct current disjunction.Consider, the present embodiment adopts the isolating switch F1, the F2 that contain fuse to realize above-mentioned fusing and grading function.The highest working voltage of power battery module subsystem design, not higher than 60VDC, is safe voltage scope, can further improve the personal security in system maintenance process.
In addition, bimetallic thermostat temperature protection electrokinetic cell system corresponding state can be by local light, the HMI instruction of being correlated with, or by telecommunication system, correlation behavior information is uploaded to remote monitoring center.
As shown in Figure 2, the battery pack of this example adopts 36 cells, in series by three battery modules, each battery module is connected by 12 cells, and between adjacent battery modules, be connected with respectively a relay K 2 and K3, certainly, also can be connected in series respectively again a relay K 1 and K4 at the major loop at the two ends of this series battery, a corresponding bimetallic thermostat is set on any one conducting connecting part of each battery module.
Be illustrated in figure 3 the structure chart of the utility model relay control circuit the first embodiment, this example design is installed respectively bimetallic thermostat (preferably evenly choosing installation site) S1, S2, S3 on the insulation copper bar between cell G6-G7, G18-G19, G24-G25, and three thermostats are evenly distributed in electrokinetic cell system; The normally-closed contact of S1, S2, S3 is connected in the coil control circuit of relay K 1～K4, the coil of K1～K4 is parallel with one another, by the voltage status of the flashing indicator light H1 instruction coil in parallel at relay coil two ends, and can battery pack state local/remote be indicated by switching auxiliary relay.By controlling disjunction and the unlatching of thermostat normally-closed contact, the break-make of control relay coil voltage indirectly, and then classification closure and the disjunction of control electrokinetic cell system, realize the control of electrokinetic cell system temperature to running status.Above-mentioned protection process is that bimetallic thermostat detects electrokinetic cell system multi-point temp; because the contact of each bimetallic thermostat is connected in series; as long as wherein any point temperature reaches after opening temperature (critical temperature); corresponding bimetallic thermostat contact action; normally-closed contact disjunction; DC control circuit open circuit, finally realizes the control of cut-offfing to the multistage battery module subsystem of electrokinetic cell system.
Be illustrated in figure 4 the structure chart of the utility model relay control circuit the second embodiment, that a corresponding bimetallic thermostat is set on any one conducting connecting part of each battery module equally, the present embodiment is installed respectively bimetallic thermostat (preferably evenly choosing installation site) S1, S2, S3, S4 on the insulation copper bar of cell G7-G8, G14-G15, G16-G17, G28-G29, and four bimetallic thermostats are evenly distributed in electrokinetic cell system; The normally-closed contact of S1, S2, S3, S4 is corresponding being serially connected in four coil control branch roads of relay K 1～K4 respectively, any one measurement point temperature reaches after opening temperature (critical temperature), corresponding bimetallic thermostat contact action, normally-closed contact disjunction, DC control circuit open circuit, finally realizes the control of cut-offfing to the multistage battery module subsystem of electrokinetic cell system.The final control flow of said process is as follows: power battery pack system temperature (insulation copper bar temperature)---bimetallic thermostat contact---relay coil---relay normally open contact---battery pack running status.
In addition, be the distressed structure of Fig. 3 and Fig. 4 as shown in Figure 5 and Figure 6, the structure of Fig. 5 is the combination of Fig. 3 and Fig. 4 embodiment, on the branch road of each relay coil, be connected in series respectively a corresponding bimetallic thermostat contact, on the main line of control loop, be also connected in series the contact of a bimetallic thermostat S5, S5 is for example installed on, on the insulation copper bar of setting position (G34-G35) simultaneously; In Fig. 6, by the each relay coil of K1～K4 two ends respectively corresponding indicator light H1～H4 in parallel in parallel indicate the voltage status of corresponding relay coil.
In addition, for relay control circuit is protected, the present embodiment is connected in series fuse F3 and carries out over load protection on the main circuit of control loop.
As the embodiment of Fig. 7～Figure 9 shows that the utility model dynamical system main circuit taking Fig. 1 as other distressed structures on basis, these several embodiment enter to adopt the three Battery pack modules battery pack system forming in parallel.
As shown in Figure 7, a relay K 4 (also can arrange multiple) is set on the main line of main circuit, relay is not set in each parallel branch, on the insulation copper bar of locating at an arbitrary position, one or more bimetallic thermostats are set, control relay circuit can adopt any one of Fig. 3～Fig. 6, adopts K4 to control cut-offfing of whole batteries in parallel connection dynamical system.
As shown in Figure 8, a relay K 1～K3 is set respectively in each parallel branch, any position at each battery module of correspondence arranges one or more bimetallic thermostats, and control relay circuit can adopt any one of Fig. 3～Fig. 6, the electrokinetic cell system of this parallel-connection structure.In the time adopting the control loop of Fig. 4 structure, its principle is that each battery module all can independently be controlled, the main circuit that variation causes of a battery module temperature cut-off the battery module that does not affect other.
The combining structure of Fig. 7 and two kinds of embodiment of Fig. 8 as shown in Figure 9, a relay K 4 (also can arrange multiple) is not only set on the main line of main circuit, and a relay K 1～K3 is set respectively in each parallel branch, this structure can adopt any one of Fig. 3～Fig. 6, the electrokinetic cell system of this parallel-connection structure equally.
Above embodiment is only for helping to understand core concept of the present utility model; can not limit the utility model with this; the combining form of the utility model battery module is varied; in its control loop, the connected mode of bimetallic thermostat and relay coil is also varied; do not enumerate at this; for those skilled in the art; every foundation thought of the present utility model; the utility model is out of shape amendment or is equal to replacement; any change of doing in specific embodiments and applications, within all should being included in protection range of the present utility model.
Claims (5)
1. one kind has the electrokinetic cell system of thermal runaway defencive function, it is characterized in that: the battery pack that comprises the battery module formation of at least one series connection, the cell of this battery pack connects by conducting connecting part, and the conducting connecting part of or at least two setting positions is provided with corresponding thermostat; Described battery pack is connected in series with at least one relay, and the corresponding contact of a thermostat or the series connection of the contact of at least two thermostats coil rear and any one relay is connected in series.
2. the electrokinetic cell system with thermal runaway defencive function according to claim 1, is characterized in that: described conducting connecting part is insulation copper bar.
3. the electrokinetic cell system with thermal runaway defencive function according to claim 1, is characterized in that: described thermostat is bimetallic thermostat.
4. the electrokinetic cell system with thermal runaway defencive function according to claim 1, is characterized in that: on described relay coil, be connected with indicator light.
5. according to the electrokinetic cell system with thermal runaway defencive function described in claim 1～4 any one, it is characterized in that: in this electrokinetic cell system, be in series with at least one isolating switch with fuse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420208003.XU CN203800141U (en) | 2014-04-25 | 2014-04-25 | Power battery system with thermal runaway protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420208003.XU CN203800141U (en) | 2014-04-25 | 2014-04-25 | Power battery system with thermal runaway protection function |
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| Publication Number | Publication Date |
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| CN203800141U true CN203800141U (en) | 2014-08-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420208003.XU Expired - Lifetime CN203800141U (en) | 2014-04-25 | 2014-04-25 | Power battery system with thermal runaway protection function |
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| CN (1) | CN203800141U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106205029A (en) * | 2016-07-22 | 2016-12-07 | 北京航空航天大学 | A kind of electrokinetic cell thermal runaway autoalarm and method |
| CN109080468A (en) * | 2018-06-27 | 2018-12-25 | 中航锂电（洛阳）有限公司 | A kind of band overcharges the method for early warning and system of the battery modules of protective device |
| CN110525219A (en) * | 2019-09-04 | 2019-12-03 | 江铃汽车股份有限公司 | A kind of detection of power battery pack thermal runaway and protective device and its method of electric car |
| CN113161647A (en) * | 2020-12-31 | 2021-07-23 | 凯博能源科技有限公司 | Battery pack, battery system and battery pack thermal runaway control method |
| WO2023024860A1 (en) * | 2021-08-24 | 2023-03-02 | 上海奥威科技开发有限公司 | Over-heating early warning and active safety control system apparatus, and control method |
| WO2023126273A1 (en) * | 2021-12-30 | 2023-07-06 | Polestar Performance Ab | Bi-material electric vehicle battery disconnect |
-
2014
- 2014-04-25 CN CN201420208003.XU patent/CN203800141U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106205029A (en) * | 2016-07-22 | 2016-12-07 | 北京航空航天大学 | A kind of electrokinetic cell thermal runaway autoalarm and method |
| CN106205029B (en) * | 2016-07-22 | 2019-01-25 | 北京航空航天大学 | A kind of power battery thermal runaway automatic alarm device and method |
| CN109080468A (en) * | 2018-06-27 | 2018-12-25 | 中航锂电（洛阳）有限公司 | A kind of band overcharges the method for early warning and system of the battery modules of protective device |
| CN110525219A (en) * | 2019-09-04 | 2019-12-03 | 江铃汽车股份有限公司 | A kind of detection of power battery pack thermal runaway and protective device and its method of electric car |
| CN113161647A (en) * | 2020-12-31 | 2021-07-23 | 凯博能源科技有限公司 | Battery pack, battery system and battery pack thermal runaway control method |
| WO2023024860A1 (en) * | 2021-08-24 | 2023-03-02 | 上海奥威科技开发有限公司 | Over-heating early warning and active safety control system apparatus, and control method |
| WO2023126273A1 (en) * | 2021-12-30 | 2023-07-06 | Polestar Performance Ab | Bi-material electric vehicle battery disconnect |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220112 Address after: No.1 Jiangdong Avenue, Jintan District, Changzhou City, Jiangsu Province Patentee after: Zhongchuangxin Aviation Technology Co.,Ltd. Address before: No.66, Binhe North Road, high tech Development Zone, Luoyang City, Henan Province Patentee before: CHINA AVIATION LITHIUM BATTERY Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140827 |
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| CX01 | Expiry of patent term |