CN102680191A - Leakage detection device for power cells - Google Patents
Leakage detection device for power cells Download PDFInfo
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- CN102680191A CN102680191A CN2012101852495A CN201210185249A CN102680191A CN 102680191 A CN102680191 A CN 102680191A CN 2012101852495 A CN2012101852495 A CN 2012101852495A CN 201210185249 A CN201210185249 A CN 201210185249A CN 102680191 A CN102680191 A CN 102680191A
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Abstract
The invention relates to a leakage detection device for power cells. The leakage detection device mainly comprises a power source, a divider resistance, a leakage sensor circuit, a signal processing circuit and an alarm. A leakage sensor forming the leakage sensor circuit is a flexible single-side printed circuit board (PCB), two wires which are not mutually conducted are printed on one lateral surface of the single-side PCB, and the two wires are distributed on the surface of the single-side PCB. During mounting, the leakage sensor is paced below the bottom of a single cell, and one side with circuits printed on the surface of the sensor is contacted with the bottom of the single cell. When electrolyte leakage happens to one or more single cells in a battery system, the electrolyte flows to the surface of the leakage sensor below the electrolyte along the outer casing of the single cell, impedance of the leakage sensor circuit is caused to change, and the signal processing circuit sends signals to stimulate the alarm to alarm. The power battery leakage detection device has the advantages of being reasonable in mechanism, flexible in detection and suitable for leakage detection of various kinds of power battery systems.
Description
Technical field
The present invention relates to a kind of electrokinetic cell apparatus for testing weeping, relate in particular to the apparatus for testing weeping of lithium ion flexible package electrokinetic cell, belong to the battery technology field.
Background technology
At present, electric automobile adopts the lithium-ion-power cell of flexible packaging more, and the aluminum plastic film of its shell breakage occurs with the shell or the module housing repeated friction of other cell when driving easily, causes the electrolytic solution of cell to be revealed.A small amount of electrolytic solution leakage can cause battery failure in the battery, and the electrolytic solution leakage can cause very abominable security incidents such as battery short circuit, on fire, blast.A kind of available dynamic battery leakage detection method is adopted the detection control circuit electrokinetic cell tank shell and battery system total voltage value is measured, and confirms the leakage of battery through the control module analytical calculation.This kind detection method has only when electrolytic solution is leaked on the battery case housing and could effectively detect, and the micro-leakage situation that cell is occurred then can't detect.The micro-leakage of cell still might cause electric automobile to occur major accident in the process of moving.Cell in the battery case is a lot, will cause that detection system is complicated, cost is high if one by one each cell is detected.
Summary of the invention
The present invention will provide a kind of device that detects to the cell leakage, and it is simple in structure, can quick and precisely detect the micro-leakage situation that one or more cells occur in the battery system, prevent accident.
Electrokinetic cell apparatus for testing weeping of the present invention mainly is made up of power supply, divider resistance, leakage sensor circuit, signal processor, alarm; Power supply is connected with divider resistance, leakage sensor circuit and is formed the loop; Signal processor is connected in the two ends of leakage sensor circuit, and alarm is connected with signal processor; Wherein power supply is used for to the late-class circuit input voltage, and divider resistance plays the effect of regulation voltage signal, and signal processor detects the output of leakage sensor circuit.When leakage appearred in one or more cells, the leak sensor induction caused the resistance value of leakage sensor circuit to change, and after signal processor detects variation, sends signal to alarm, excites alarm to report to the police.
The leakage sensor circuit is made up of leakage sensor in the battery leakage pick-up unit; Each cell can correspondingly be installed a leakage sensor; Also can be by the shared leakage sensor of two or more cells, leakage sensor composes in parallel the leakage sensor circuit.
In above-mentioned electrokinetic cell apparatus for testing weeping; Leakage sensor is flexible single-sided printed circuit board (PCB); One side of circuit board is printed with the lead of two mutual not conductings, and arrangement of conductors is in circuit board surface, and leakage sensor is installed in the below, bottom surface of cell; Being printed with circuit one side surface on the flexible single-sided printed circuit board (PCB) contacts with the bottom surface of cell; The shape of flexible single-sided printed circuit board (PCB) can be identical with the cell bottom shape, also can be other shape, reveals the zone that electrolytic solution may flow in the cell bottom surface but must be able to cover.
Power supply in the above-mentioned electrokinetic cell apparatus for testing weeping is a direct supply.
The electrokinetic cell apparatus for testing weeping that the present invention designed has following advantage and good effect compared with prior art:
1. simple in structure, can realize the leakage situation of all cells in the battery system is detected, in time find the micro-phenomenon of leakage of single or a plurality of cells, detection sensitivity is high;
2. when battery stacked, the flexible printed circuit board in the leakage sensor was interval between two cells that contacted with each other originally, can slow down because the wearing and tearing that the mutual friction of cell phase causes;
3. the flexible print circuit thin thickness of formation leakage sensor, in light weight can not affect greatly the weight and the size of entire cell system;
4. through regulating the spacing of two leads of flexible single-sided printed circuit board (PCB), the sensitivity level of may command power battery leakage pick-up unit makes this electrokinetic cell apparatus for testing weeping that the wider scope of application arranged;
5. many leakage sensors can shared same power supply and signal processor, has saved the cost of battery system greatly, reduces the weight increasing degree.
Electrokinetic cell apparatus for testing weeping of the present invention is mainly used in the lithium-ion-power cell system, and the leakage that also can be used in other electrokinetic cell systems detects.
Description of drawings
Fig. 1 is an electrokinetic cell apparatus for testing weeping circuit block diagram of the present invention.
Fig. 2 is the structural representation of leakage sensor among Fig. 1.
Fig. 3 is the scheme of installation of leakage sensor among Fig. 1.
Fig. 4 is the similar alternative arrangements synoptic diagram of leakage sensor and battery among Fig. 1.
Embodiment
Below in conjunction with accompanying drawing and embodiment structure of the present invention and embodiment are described further.
Embodiment 1
Electrokinetic cell apparatus for testing weeping of the present invention as shown in Figure 1; Form by power supply 10, divider resistance 11, leakage sensor circuit 12, signal processor 13, alarm 14; Power supply 10 is a direct supply; Connecting with divider resistance 11, leakage sensor circuit 12 forms the loop, and signal processor 13 is connected in the two ends of leakage sensor circuit 14, and alarm 14 is connected with signal processor 13; Wherein power supply 10 is used for to the late-class circuit input voltage; Divider resistance 11 plays the effect of regulation voltage signal; Leakage sensor circuit 12 comprises leakage sensor 120,121,122 of a plurality of parallel connections or the like, the corresponding leakage sensor of installing of each cell, and the quantity of leakage sensor is identical with the quantity of cell in the battery case; Leakage sensor composes in parallel leakage sensor circuit 12, and the output of 13 pairs of leakage sensor circuit 12 of signal processor detects.
Leakage sensor 120,121,122 is the identical square loop sensor of structure, shape; As shown in Figure 2; It is flexible single-sided printed circuit board (PCB); One side surface of leakage sensor 120 is printed with the lead 20 and 21 of two mutual not conductings, and lead 20 and 21 is arranged in parallel and is covered with entire circuit plate surface.The length of side of annular outside, leakage sensor side is identical with the length of side of cell bottom surface, and the outside is 30mm to the distance of inner edge, and thickness is 0.1mm, and the spacing between the lead 20 and 21 is 10mm.Leakage sensor 120 is as shown in Figure 3 with the installation site of cell 30; Cell 30 is folded the cell identical with other to fall to putting together; Leakage sensor 120 is positioned over the below, bottom surface of cell 30, and its side surface that is printed with circuit contacts opposite side and can contact with another adjacent battery with the bottom surface of cell.
When using; The two ends of signal processor 13 are connected with leakage sensor circuit 12 two ends, the impedance of leakage sensor circuit 12 are detected, when leakage appears in cell; The electrolytic solution that leaks will flow to the surface of the leakage sensor 120 of its below along the cell shell; Lead 20 in this moment 120 will be switched on lead 21, cause whole leakage sensor circuit 12 resistance values to change, when signal processing circuit 13 detects this variation; Send a signal to alarm 14, excite alarm 14 to report to the police.
Find out by above-mentioned; The electrokinetic cell apparatus for testing weeping is simple in structure, is quick on the draw, and the flexible printed circuit board in the leakage sensor is interval between two cells that contacted with each other originally; Can slow down because the wearing and tearing that the mutual friction of cell phase causes; And thin thickness, in light weight can not affect greatly the weight and the size of entire cell system, can be widely used in the electrokinetic cell system.
Embodiment 2
The present invention can be widely used in various the need and detect in the electrokinetic cell system of leakage situation, and leakage sensor is not limited to design shape and size among the embodiment, the shape and the size that can be fit to according to the situation selection of concrete battery.
Claims (5)
1. electrokinetic cell apparatus for testing weeping; It is characterized in that: mainly form by power supply, divider resistance, leakage sensor circuit, signal processor, alarm; Power supply is connected with divider resistance, leakage sensor circuit and is formed the loop; Signal processor is connected in the two ends of leakage sensor circuit, and alarm is connected with signal processor; Wherein power supply is used for to the late-class circuit input voltage, and divider resistance plays the effect of regulation voltage signal, and signal processor detects the output of leakage sensor circuit.
2. electrokinetic cell apparatus for testing weeping according to claim 1; Its characteristic also is: the leakage sensor circuit is made up of leakage sensor; Each cell can correspondingly be installed a leakage sensor; Also can be by the shared leakage sensor of two or more cells, leakage sensor composes in parallel the leakage sensor circuit.
3. electrokinetic cell apparatus for testing weeping according to claim 2, its characteristic also is: leakage sensor is flexible single-sided printed circuit board (PCB), and a side of circuit board is printed with the lead of two mutual not conductings, and arrangement of conductors is in circuit board surface.
4. electrokinetic cell apparatus for testing weeping according to claim 3; Its characteristic also is: be printed with circuit one side surface on the flexible single-sided printed circuit board (PCB) and contact with the bottom surface of cell; The shape of flexible single-sided printed circuit board (PCB) can be identical with the cell bottom shape; Also can be other shape, reveal the zone that electrolytic solution may flow in the cell bottom surface but must be able to cover.
5. electrokinetic cell apparatus for testing weeping according to claim 1, its characteristic also is: power supply is a direct supply.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210185249.5A CN102680191B (en) | 2012-06-07 | 2012-06-07 | Leakage detection device for power cells |
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| CN201210185249.5A CN102680191B (en) | 2012-06-07 | 2012-06-07 | Leakage detection device for power cells |
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| CN102680191A true CN102680191A (en) | 2012-09-19 |
| CN102680191B CN102680191B (en) | 2015-06-10 |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104018123A (en) * | 2014-06-16 | 2014-09-03 | 深圳市华星光电技术有限公司 | Heater capable of detecting and preventing leakage of high-temperature metal material |
| CN106532146A (en) * | 2016-10-09 | 2017-03-22 | 浙江超威创元实业有限公司 | Electric vehicle power battery box liquid leakage detection system and detection method thereof |
| CN106872124A (en) * | 2017-02-07 | 2017-06-20 | 武汉华星光电技术有限公司 | A kind of conducting liquid leaks detecting system |
| CN108318827A (en) * | 2018-03-07 | 2018-07-24 | 华霆（合肥）动力技术有限公司 | Apparatus for testing weeping, system and electric vehicle |
| CN108448182A (en) * | 2018-04-20 | 2018-08-24 | 华霆（合肥）动力技术有限公司 | Method for detecting leakage and device |
| CN108663167A (en) * | 2018-06-22 | 2018-10-16 | 湖南耐普恩科技有限公司 | A kind of detection device of ultracapacitor leak detection anti-leak |
| CN108692866A (en) * | 2018-04-04 | 2018-10-23 | 芜湖捷欧汽车部件有限公司 | A kind of water spray for automobile pot detection device |
| CN108918031A (en) * | 2018-04-04 | 2018-11-30 | 芜湖捷欧汽车部件有限公司 | A kind of water spray for automobile pot detection device with drying function |
| WO2019128451A1 (en) * | 2017-12-29 | 2019-07-04 | 华为技术有限公司 | Leakage detection method, device, and electronic apparatus |
| CN110132988A (en) * | 2019-06-12 | 2019-08-16 | 广东省智能机器人研究院 | A kind of power battery electrolyte leakage detection equipment |
| CN110631782A (en) * | 2018-06-22 | 2019-12-31 | 三菱电机大楼技术服务株式会社 | Liquid leakage detection device |
| CN112242573A (en) * | 2020-09-04 | 2021-01-19 | 东风时代(武汉)电池系统有限公司 | Battery package weeping fault detection system and car |
| CN112614115A (en) * | 2020-12-28 | 2021-04-06 | 中国第一汽车股份有限公司 | Power battery water seepage monitoring method |
| US20220328888A1 (en) * | 2019-08-26 | 2022-10-13 | Lg Energy Solution, Ltd. | Electrolyte Detection Device and Secondary Battery Transfer Facility Comprising the Same |
| WO2023163550A1 (en) * | 2022-02-24 | 2023-08-31 | 주식회사 엘지에너지솔루션 | Flexible printed circuit board and secondary battery module comprising same |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104018123A (en) * | 2014-06-16 | 2014-09-03 | 深圳市华星光电技术有限公司 | Heater capable of detecting and preventing leakage of high-temperature metal material |
| CN104018123B (en) * | 2014-06-16 | 2016-05-11 | 深圳市华星光电技术有限公司 | Detect and prevent the heater that high temperature metallic material leaks |
| CN106532146A (en) * | 2016-10-09 | 2017-03-22 | 浙江超威创元实业有限公司 | Electric vehicle power battery box liquid leakage detection system and detection method thereof |
| CN106872124A (en) * | 2017-02-07 | 2017-06-20 | 武汉华星光电技术有限公司 | A kind of conducting liquid leaks detecting system |
| WO2019128451A1 (en) * | 2017-12-29 | 2019-07-04 | 华为技术有限公司 | Leakage detection method, device, and electronic apparatus |
| CN108318827A (en) * | 2018-03-07 | 2018-07-24 | 华霆（合肥）动力技术有限公司 | Apparatus for testing weeping, system and electric vehicle |
| CN108318827B (en) * | 2018-03-07 | 2023-11-28 | 华霆（合肥）动力技术有限公司 | Liquid leakage detection device, system and electric vehicle |
| CN108918031A (en) * | 2018-04-04 | 2018-11-30 | 芜湖捷欧汽车部件有限公司 | A kind of water spray for automobile pot detection device with drying function |
| CN108692866A (en) * | 2018-04-04 | 2018-10-23 | 芜湖捷欧汽车部件有限公司 | A kind of water spray for automobile pot detection device |
| CN108448182A (en) * | 2018-04-20 | 2018-08-24 | 华霆（合肥）动力技术有限公司 | Method for detecting leakage and device |
| CN108663167A (en) * | 2018-06-22 | 2018-10-16 | 湖南耐普恩科技有限公司 | A kind of detection device of ultracapacitor leak detection anti-leak |
| CN110631782A (en) * | 2018-06-22 | 2019-12-31 | 三菱电机大楼技术服务株式会社 | Liquid leakage detection device |
| CN110132988A (en) * | 2019-06-12 | 2019-08-16 | 广东省智能机器人研究院 | A kind of power battery electrolyte leakage detection equipment |
| US20220328888A1 (en) * | 2019-08-26 | 2022-10-13 | Lg Energy Solution, Ltd. | Electrolyte Detection Device and Secondary Battery Transfer Facility Comprising the Same |
| US11830987B2 (en) * | 2019-08-26 | 2023-11-28 | Lg Energy Solution, Ltd. | Electrolyte detection device and secondary battery transfer facility comprising the same |
| CN112242573A (en) * | 2020-09-04 | 2021-01-19 | 东风时代(武汉)电池系统有限公司 | Battery package weeping fault detection system and car |
| CN112614115A (en) * | 2020-12-28 | 2021-04-06 | 中国第一汽车股份有限公司 | Power battery water seepage monitoring method |
| CN112614115B (en) * | 2020-12-28 | 2024-03-26 | 中国第一汽车股份有限公司 | Power battery water seepage monitoring method |
| WO2023163550A1 (en) * | 2022-02-24 | 2023-08-31 | 주식회사 엘지에너지솔루션 | Flexible printed circuit board and secondary battery module comprising same |
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| CN102680191B (en) | 2015-06-10 |
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Effective date of registration: 20160318 Address after: 101407 Beijing Yanqi Yanqi Economic Development Zone Huairou District Road No. 3 Patentee after: GUOLIAN AUTOMOBILE POWER CELL INSTITUTE CO., LTD. Address before: 100088 Beijing city Xicheng District Xinjiekou Avenue No. 2 Patentee before: General Research Institute for Nonferrous Metals |