CN103616641A - Method for detecting looseness of electric vehicle battery connecting line - Google Patents
Method for detecting looseness of electric vehicle battery connecting line Download PDFInfo
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- CN103616641A CN103616641A CN201310555462.5A CN201310555462A CN103616641A CN 103616641 A CN103616641 A CN 103616641A CN 201310555462 A CN201310555462 A CN 201310555462A CN 103616641 A CN103616641 A CN 103616641A
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Abstract
The invention discloses a method for detecting looseness of an electric vehicle battery connecting line. Module batteries of a battery pack are connected through connecting pieces and fixed through nuts. A battery management system is utilized for estimating connecting resistances of the connecting pieces between the module batteries. When the estimated value is larger than a set range, the existence of the looseness situation of connection of the batteries is judged. According to the method for detecting the looseness of the electric vehicle battery connecting line, the connecting resistances of the batteries are estimated through the existing voltage collecting function and the current collecting function of the battery management system, whether the connection of the battery loosens or not is judged according to the estimated value, a sampling line does not need to be added, a detection module does not need to be added, the connecting situation of each connecting piece can be judged, and if a connecting looseness fault occurs, an alarm can be timely given to remind workers to inspect and maintain the connecting pieces. The method for detecting the looseness of the electric vehicle battery connecting line has the advantages of being low in cost, easy to implement, high in reliability and the like.
Description
Technical field
The present invention relates to batteries of electric automobile, the loosening detection method of a kind of especially batteries of electric automobile connecting line.
Background technology
Electric automobile adopts electric battery to power, and each modular battery connects to obtain higher voltage and energy, to vehicle, provides electrical source of power.In electric battery, conventionally adopt brace to connect each modular battery, and adopt nut to be fixed.In the process that electric automobile uses, the road situations such as vehicle rocks of jolting can produce certain influence to the connection of modular battery.In the long-term process of using, being connected with of part battery may produce loosening situation, affects the normal use of battery and the safety of vehicle.
At present, for battery, connecting loosening detection scheme is mainly the temperature that detects brace, when brace is loosening, electric current can produce larger heat temperature is raise on brace, and electronic equipment judges by detecting the ANOMALOUS VARIATIONS of brace temperature whether battery connects loosening.This scheme is applicable to the electric battery of negligible amounts, for batteries of electric automobile group, conventionally by up to a hundred modular batteries, be composed in series, so the brace of battery also reaches up to a hundred.Adopting such scheme to detect needs a large amount of temperature sensors, complicated checkout equipment, and a large amount of collection wire harness, so scheme is too complicated, and cost is high, and the reliability of collection reduces, and is not suitable for batteries of electric automobile and connects loosening detection.
Summary of the invention
For overcoming the shortcomings and deficiencies of above-mentioned prior art, the invention provides a kind of battery management system that utilizes to the loosening detection method of batteries of electric automobile connecting line.
The technical solution adopted in the present invention is:
The loosening detection method of a kind of batteries of electric automobile connecting line, the mode that each modular battery based on electric battery adopts brace to connect and adopt nut to be fixed, utilize battery management system to estimate the contact resistance of the brace between each modular battery, when estimated value is greater than the scope of setting, judges and exist battery to connect loosening situation.
The method of described detection, specifically comprises step:
(1) battery management system is controlled after charging set startup charging, and charging current jumps to Ic by 0;
(2) magnitude of voltage V1, the V2 between front each modular battery of charge initiation monitored and preserved to battery management system ... magnitude of voltage V1 ＇, V2 ＇ after VN and charge initiation between each modular battery ... VN ＇;
(3) battery management system calculates contact resistance R1=(V1 ＇-V1)/Ic between each modular battery, R2=(V2 ＇-V2)/Ic ... RN=(VN ＇-VN)/Ic;
(4) battery management system judges that contact resistance between each modular battery whether in the scope of setting, if surpass the scope of setting, judges and exist battery to connect loosening situation, and carry out fault alarm.
The present invention removes estimating battery contact resistance by the existing voltage acquisition function of battery management system and current acquisition function, and according to estimated value interpretation, go out battery and whether connect loosening, the present invention is without increasing sampling circuit, without increasing detection module, just can judge the connection of each brace, if any connect looseness fault can also and alarm, prompting personnel carry out examination and maintenance.The present invention has low, the easy realization of cost, high reliability.
Embodiment
For convenience of those skilled in the art, understand technology contents of the present invention, below in conjunction with embodiment, the present invention is described in further detail.
Purport of the present invention is to utilize the situation of change of battery management system Real-Time Monitoring electric current and battery module voltage, catch the opportunity of suitable calculating battery contact resistance, contact resistance to battery is estimated, and estimated value and setting value are compared, when estimated value is greater than the scope of setting value, can judges battery and connect loosening.Battery management system carries out fault alarm after finding that battery connects loosening situation, and prompting personnel tool car, guarantees safety.
The loosening detection method of batteries of electric automobile connecting line of the present invention, specifically comprises step:
(1) battery management system is controlled after charging set startup charging, and charging current jumps to larger value Ic, for example a 30A by 0;
(2) magnitude of voltage V1, the V2 between front each modular battery of charge initiation monitored and preserved to battery management system ... magnitude of voltage V1 ＇, V2 ＇ after VN and charging have just started between each modular battery ... VN ＇;
(3) battery management system calculates contact resistance R1=(V1 ＇-V1)/Ic between each modular battery, R2=(V2 ＇-V2)/Ic ... RN=(VN ＇-VN)/Ic;
(4) battery management system judges that contact resistance between each modular battery whether in the scope of setting, if surpass the scope of setting, judges and exist battery to connect loosening situation, and carry out fault alarm, and prompting personnel tool car, guarantees safety.
Above-described embodiment is only wherein specific implementation of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these apparent replacement forms all belong to protection scope of the present invention.
Claims (2)
1. the detection method that batteries of electric automobile connecting line is loosening, the mode that each modular battery based on electric battery adopts brace to connect and adopt nut to be fixed, it is characterized in that, utilize battery management system to estimate the contact resistance of the brace between each modular battery, when estimated value is greater than the scope of setting, judges and exist battery to connect loosening situation.
2. detection method according to claim 1, is characterized in that, comprises step:
(1) battery management system is controlled after charging set startup charging, and charging current jumps to Ic by 0;
(2) magnitude of voltage V1, the V2 between front each modular battery of charge initiation monitored and preserved to battery management system ... magnitude of voltage V1 ＇, V2 ＇ after VN and charge initiation between each modular battery ... VN ＇;
(3) battery management system calculates contact resistance R1=(V1 ＇-V1)/Ic between each modular battery, R2=(V2 ＇-V2)/Ic ... RN=(VN ＇-VN)/Ic;
(4) battery management system judges that contact resistance between each modular battery whether in the scope of setting, if surpass the scope of setting, judges and exist battery to connect loosening situation, and carry out fault alarm.
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| CN201310555462.5A CN103616641A (en) | 2013-11-11 | 2013-11-11 | Method for detecting looseness of electric vehicle battery connecting line |
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| CN201310555462.5A CN103616641A (en) | 2013-11-11 | 2013-11-11 | Method for detecting looseness of electric vehicle battery connecting line |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105589010A (en) * | 2014-11-06 | 2016-05-18 | 罗伯特·博世有限公司 | Device and method used for identifying contact failure of batteries of battery pack |
| CN105676136A (en) * | 2016-01-14 | 2016-06-15 | 北京新能源汽车股份有限公司 | Fault detection method and device for power battery connecting pieces and management system |
| CN106066448A (en) * | 2015-04-23 | 2016-11-02 | 福特全球技术公司 | Battery contact monitoring method and assembly |
| CN106450530A (en) * | 2016-12-15 | 2017-02-22 | 北京新能源汽车股份有限公司 | Battery module testing system and method |
| CN108398613A (en) * | 2018-03-02 | 2018-08-14 | 蔚来汽车有限公司 | Detection method and device, controller and the medium of battery and vehicle body connection status |
| CN108414887A (en) * | 2018-06-16 | 2018-08-17 | 东莞毅比道自动化设备有限公司 | A kind of mold wiring test device, system and method |
| CN108511834A (en) * | 2018-03-27 | 2018-09-07 | 华霆（合肥）动力技术有限公司 | Monitoring device, power-supply device and electric vehicle |
| CN109100657A (en) * | 2018-07-26 | 2018-12-28 | 浙江慧众智能装备科技有限公司 | A kind of control method of power battery and its detection tester for electronic circuit fault |
| CN109541471A (en) * | 2018-11-27 | 2019-03-29 | 安徽江淮汽车集团股份有限公司 | A kind of battery sampling line slap fault diagnosis method |
| CN112415430A (en) * | 2020-11-04 | 2021-02-26 | 合肥力高动力科技有限公司 | Diagnosis method for disconnection and connection looseness of Hall current sensor |
| CN112596001A (en) * | 2020-12-07 | 2021-04-02 | 欣旺达电动汽车电池有限公司 | Method and device for detecting looseness of module connecting row and computer equipment |
| CN113156209A (en) * | 2021-03-05 | 2021-07-23 | 淮安骏盛新能源科技有限公司 | Diagnosis method for monitoring looseness of mounting bolts of bus bar connected between modules |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105589010A (en) * | 2014-11-06 | 2016-05-18 | 罗伯特·博世有限公司 | Device and method used for identifying contact failure of batteries of battery pack |
| CN106066448B (en) * | 2015-04-23 | 2021-03-02 | 福特全球技术公司 | Battery tab monitoring method and assembly |
| CN106066448A (en) * | 2015-04-23 | 2016-11-02 | 福特全球技术公司 | Battery contact monitoring method and assembly |
| CN105676136A (en) * | 2016-01-14 | 2016-06-15 | 北京新能源汽车股份有限公司 | Fault detection method and device for power battery connecting pieces and management system |
| CN106450530A (en) * | 2016-12-15 | 2017-02-22 | 北京新能源汽车股份有限公司 | Battery module testing system and method |
| CN108398613A (en) * | 2018-03-02 | 2018-08-14 | 蔚来汽车有限公司 | Detection method and device, controller and the medium of battery and vehicle body connection status |
| WO2019165700A1 (en) * | 2018-03-02 | 2019-09-06 | 蔚来汽车有限公司 | Method and apparatus for detecting connection state between battery and vehicle body, and controller and medium |
| CN108511834A (en) * | 2018-03-27 | 2018-09-07 | 华霆（合肥）动力技术有限公司 | Monitoring device, power-supply device and electric vehicle |
| CN108414887A (en) * | 2018-06-16 | 2018-08-17 | 东莞毅比道自动化设备有限公司 | A kind of mold wiring test device, system and method |
| CN109100657A (en) * | 2018-07-26 | 2018-12-28 | 浙江慧众智能装备科技有限公司 | A kind of control method of power battery and its detection tester for electronic circuit fault |
| CN109100657B (en) * | 2018-07-26 | 2021-06-29 | 浙江慧众智能装备科技有限公司 | Power battery and control method of circuit fault detection system thereof |
| CN109541471A (en) * | 2018-11-27 | 2019-03-29 | 安徽江淮汽车集团股份有限公司 | A kind of battery sampling line slap fault diagnosis method |
| CN109541471B (en) * | 2018-11-27 | 2020-05-29 | 安徽江淮汽车集团股份有限公司 | Method for diagnosing loosening fault of battery sampling line |
| CN112415430A (en) * | 2020-11-04 | 2021-02-26 | 合肥力高动力科技有限公司 | Diagnosis method for disconnection and connection looseness of Hall current sensor |
| CN112415430B (en) * | 2020-11-04 | 2022-09-06 | 合肥力高动力科技有限公司 | Diagnosis method for disconnection and connection looseness of Hall current sensor |
| CN112596001A (en) * | 2020-12-07 | 2021-04-02 | 欣旺达电动汽车电池有限公司 | Method and device for detecting looseness of module connecting row and computer equipment |
| CN112596001B (en) * | 2020-12-07 | 2022-10-28 | 欣旺达电动汽车电池有限公司 | Method and device for detecting looseness of module connecting row and computer equipment |
| CN113156209A (en) * | 2021-03-05 | 2021-07-23 | 淮安骏盛新能源科技有限公司 | Diagnosis method for monitoring looseness of mounting bolts of bus bar connected between modules |
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Application publication date: 20140305 |