CN201311484Y - Battery pack checking device - Google Patents

Battery pack checking device Download PDF

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Publication number
CN201311484Y
CN201311484Y CNU200820214029XU CN200820214029U CN201311484Y CN 201311484 Y CN201311484 Y CN 201311484Y CN U200820214029X U CNU200820214029X U CN U200820214029XU CN 200820214029 U CN200820214029 U CN 200820214029U CN 201311484 Y CN201311484 Y CN 201311484Y
Authority
CN
China
Prior art keywords
unit
sampling
power brick
battery pack
pick
Prior art date
Application number
CNU200820214029XU
Other languages
Chinese (zh)
Inventor
邓林旺
杨晓璐
张建华
Original Assignee
比亚迪股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 比亚迪股份有限公司 filed Critical 比亚迪股份有限公司
Priority to CNU200820214029XU priority Critical patent/CN201311484Y/en
Application granted granted Critical
Publication of CN201311484Y publication Critical patent/CN201311484Y/en

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Abstract

The utility model discloses a battery pack checking device, which comprises a power source, a battery pack, a sampling unit, a converting unit, a control unit and a sense resistor, wherein the power source, the battery pack, the sampling unit, the converting unit and the control unit are sequentially and electrically connected, the sense resistor is connected between the battery pack and the sampling unit in series, the sampling unit samples voltage values of the battery pack and the sense resistor, the converting unit receives and processes sampling signals of the sampling unit and then sends the signals to the control unit to be processed. By adding the sense resistor, working staff judge whether the sampling line is broken or not according to voltage value of the sense resistor when voltage of a single cell of the battery pack is 0 V, thereby accurately determining whether the single cell is in failure or not and further reducing error in judgment of checking battery pack single cell.

Description

A kind of power brick pick-up unit

Technical field

The utility model relates to a kind of pick-up unit, refers more particularly to a kind of power brick pick-up unit.

Background technology

Along with the development of society and people pay attention to day by day to environmental protection; having pure electronic and PHEVs efficient, energy-saving and environmental protection has become the development trend of automobile industry, and the problem of decision electric motor car or PHEV most critical is the quality of its electrokinetic cell bag.

At present, the electrokinetic cell bag adopts failure diagnostic apparatus to detect the duty of electrokinetic cell usually, failure diagnostic apparatus is connected with the sampling wire harness of cell in the power brick by gating switch, come each cell in the power brick is detected by the sampling wire harness, if the sampling of electrokinetic cell state is incorrect, then can not guarantee correct transmission battery status information in real time, the security of car load will be on the hazard.But the current driving force power brick generally lacks judgement and detection to battery sampling line broken string situation.When detecting certain joint monomer battery voltage when being the 0V left and right sides, can't judge that joint cell is that virtual voltage is due to 0V or the battery sampling wire harness disconnection fault, thereby power brick is taken in crude an dimpetuous going apart, cause power brick to shorten serviceable life.Therefore, the battery sampling line whether break become weigh power brick can be safely, an important parameter of reliable use.

The utility model content

For overcoming the problem of power brick battery detecting error in judgement, the utility model provides a kind of device that can correctly judge battery cell fault in interior battery sampling line of power brick or the power brick.

For realizing above purpose, the utility model is achieved through the following technical solutions:

A kind of power brick pick-up unit, comprise the power supply, power brick, sampling unit, conversion unit and the control module that are electrically connected successively, it is characterized in that: comprise that also one detects resistance, described detection resistance string is connected between described power brick and the sampling unit, described sampling unit is sampled to the magnitude of voltage of described power brick and described detection resistance, described conversion unit receives the sampled signal of described sampling unit, sends to control module through processing and handles.

Because having increased by one, the application detects resistance, power brick battery cell voltage occurring is under the situation of 0V, by detecting the magnitude of voltage of resistance, judges whether sample line breaks, thereby determine whether fault of battery cell accurately, reduced the power brick cell and detected the error in judgement rate.

Description of drawings

Fig. 1 is the structured flowchart of a kind of embodiment of the utility model;

Fig. 2 is the structured flowchart of the another kind of embodiment of the utility model;

Fig. 3 is the circuit structure connection diagram of a kind of embodiment of the utility model.

Embodiment

Feature of the present utility model and advantage will be elaborated in conjunction with the accompanying drawings by embodiment.

Seeing also Fig. 1, is a preferred embodiment of the present utility model.

A kind of power brick pick-up unit, comprise the power supply 1, power brick 2, sampling unit 3, conversion unit 4 and the control module 5 that are electrically connected successively, it comprises that also one detects resistance 9, described detection resistance string is connected between described power brick 2 and the sampling unit 3, the magnitude of voltage of 3 pairs of described power brick 2 of described sampling unit and described detection resistance is sampled, described conversion unit 4 receives the sampled signal of described sampling unit 3, sends to control module 4 through processing and handles.

Described power supply 1 is various power-supply devices, is preferably current source.

Described power brick 2 can be made up of a plurality of electric battery, and described electric battery is made up of at least one cell.Described cell can be various types of batteries, as accumulator, lead-acid battery, dry cell etc.

Sampling unit 3 can be various sample devicess well known in the art.

Conversion unit 4 is preferably A/D converter for being used for simulating signal is converted into the device of digital signal.

Further improve, pick-up unit of the present utility model also comprises a gating unit 6, and this gating unit 6 can be various devices, such as switch arrays, field effect transistor etc., be preferably switch arrays, its can with the optionally conducting of each cell in the power brick 1.

Further improve, also comprise a display unit 7, this display unit 7 receives the signal of described control module, is used to show detected monomer battery voltage signal value, and convenient like this operator learns the state of power brick, is convenient to further operate vehicle.

Further improve, also comprise an alarm unit 8, this alarm unit 8 receives the signal of described control module, be used for that the monomer battery voltage value equals 0V or sampling wire harness broken string is reported to the police when occurring, send various photosignals, be used for driver, can play better prompting function.

The concrete scheme of the utility model is: when detecting a certain joint monomer battery voltage and be the 0V left and right sides, can not judge at once that this joint monomer battery voltage is the actual 0V of dropping into, or the sampling wire harness of this batteries occurs due to the broken string situation.At this moment, can apply an electric current for this batteries by current source, and one of series connection detects resistance R on the loop, monitor the voltage responsive situation on this detection resistance R, feed back to control module by converting unit.Have voltage responsive to illustrate that then the battery connection is all right on the resistance if detect, failure cause batteries voltage for this reason drops into about 0V, but warning reminding related personnel this moment takes the maintenance measures to battery immediately; Do not have voltage responsive to illustrate that then this batteries connects the situation that has broken string on the resistance if detect, but warning reminding related personnel this moment take the maintenance measures to sample line immediately.

Referring to Fig. 5, be the physical circuit syndeton synoptic diagram of a preferred embodiment of the present utility model.Power supply 1 is connected with gating unit 6 by the described first by-pass cock K7, the second by-pass cock K8, gating unit 6 is formed switch arrays by a plurality of switches and is connected with power brick 2, power brick 2 is in series by the cell that a plurality of head and the tail connect, all lead to sample line at the both positive and negative polarity of each cell and be connected with gating unit 6, per two switches of gating unit 6 are connected with the positive and negative end of each cell respectively.The sample line of each cell is connected with converting unit 4, and converting unit 4 is connected with control module 5, also is provided with one and detects resistance R between power supply 1 and converting unit 4, is used for the voltage of testing circuit.

The course of work of this circuit is as follows:

When detecting a certain joint monomer battery voltage and be the 0V left and right sides, can not judge at once that this joint monomer battery voltage is the actual 0V of dropping into, or the sampling wire harness of this batteries occurs due to the broken string situation.When if the first segment monomer battery voltage that detect power brick this moment is 0V, the closed first by-pass cock K7, the second by-pass cock K8, closed K1, K2 come the first segment cell is detected by gating switch 6 change-over switches.At this moment, entire circuit is in connected state, the voltage analog signal that conversion unit 4 is used for detecting resistance R is converted into digital signal, if have electric current to pass through in the detection resistance R, then the display result of conversion unit 4 is not 0V, the sample line that then shows the first segment cell connects all right, illustrates that then failure cause saves monomer battery voltage for this reason and fallen and be 0V; If do not have electric current to pass through in the detection resistance R, then the display result of conversion unit 4 is 0V at this moment, the sample line that shows the first segment cell connects the situation that has broken string, and this moment, whether monomer battery voltage was that 0V can't determine, needing to change the cell sample line could determine, can send alerting signal this moment by alarm unit 8, and the prompting related personnel takes the maintenance measures to sample line immediately, so that further determine failure cause.

The utility model design circuit is ingenious, and is with low cost, and the reliability height.By adopting pick-up unit of the present utility model, can provide better detection mode for the battery failures investigation, and, owing to can accurately detect, do not need at every turn all dismounting cell bags, thereby prolong the serviceable life of power brick power brick.

The embodiment of the above is a better embodiment of the present utility model; be not to limit concrete practical range of the present utility model with this, the equivalence variation that all shapes according to the utility model, structure are done all is included in the protection domain of the present utility model.

Claims (7)

1, a kind of power brick pick-up unit, comprise the power supply, power brick, sampling unit, conversion unit and the control module that are electrically connected successively, it is characterized in that: comprise that also one detects resistance, described detection resistance string is connected between described power brick and the sampling unit, described sampling unit is sampled to the magnitude of voltage of described power brick and described detection resistance, described conversion unit receives the sampled signal of described sampling unit, sends to control module through processing and handles.
2, pick-up unit according to claim 1 is characterized in that: also comprise gating unit, described gating unit is used for the connection or the disconnection of gating power brick between described power brick and described sampling unit.
3, pick-up unit according to claim 2 is characterized in that: also comprise display unit, described display unit receives the signal of described control module, and shows output.
4, pick-up unit according to claim 2 is characterized in that: also comprise alarm unit, described alarm unit receives the signal of described control module, sends alerting signal.
5, pick-up unit according to claim 1 is characterized in that: described power brick is made up of at least one battery cell.
6, pick-up unit according to claim 1 is characterized in that: described gating unit is switch arrays.
7, pick-up unit according to claim 1 is characterized in that: be connected by by-pass cock between described power supply and the described power brick.
CNU200820214029XU 2008-11-27 2008-11-27 Battery pack checking device CN201311484Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNU200820214029XU CN201311484Y (en) 2008-11-27 2008-11-27 Battery pack checking device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNU200820214029XU CN201311484Y (en) 2008-11-27 2008-11-27 Battery pack checking device

Publications (1)

Publication Number Publication Date
CN201311484Y true CN201311484Y (en) 2009-09-16

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Family Applications (1)

Application Number Title Priority Date Filing Date
CNU200820214029XU CN201311484Y (en) 2008-11-27 2008-11-27 Battery pack checking device

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Country Link
CN (1) CN201311484Y (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102033205A (en) * 2009-09-30 2011-04-27 比亚迪股份有限公司 System and method for detecting fault of power battery of vehicle
CN102652268A (en) * 2010-08-31 2012-08-29 松下电器产业株式会社 Battery power supply device and battery power supply system
CN102680900A (en) * 2011-03-14 2012-09-19 三星Sdi株式会社 Test device of battery pack and method of driving the same
CN102723754A (en) * 2012-06-01 2012-10-10 惠州市亿能电子有限公司 Identifying circuit and identifying method of broken line of battery pack acquisition line of battery management system
CN102967788A (en) * 2011-09-01 2013-03-13 比亚迪股份有限公司 Line broken detection circuit of battery and detection method thereof
CN103674454A (en) * 2012-09-24 2014-03-26 微宏动力系统(湖州)有限公司 Battery-pack leakage-liquid detection system
CN103884988A (en) * 2012-12-21 2014-06-25 比亚迪股份有限公司 Battery pack fault detection device and detection method
CN104749523A (en) * 2013-12-25 2015-07-01 天维讯达无线电设备检测(北京)有限责任公司 Device for acquiring electrical characteristics of lithium battery pack
CN105620291A (en) * 2015-12-25 2016-06-01 北京新能源汽车股份有限公司 Battery voltage detecting method, equipment and device and battery management system
CN106772082A (en) * 2016-12-23 2017-05-31 惠州市蓝微新源技术有限公司 A kind of voltage acquisition line wire break detection method of cell
CN106908729A (en) * 2017-01-20 2017-06-30 安徽优旦科技有限公司 A kind of hand-hold type power battery PACK testers and its control method
CN107957559A (en) * 2017-12-12 2018-04-24 国家电网公司 A kind of battery voltage measuring device and method

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102033205A (en) * 2009-09-30 2011-04-27 比亚迪股份有限公司 System and method for detecting fault of power battery of vehicle
CN102033205B (en) * 2009-09-30 2013-01-30 比亚迪股份有限公司 System and method for detecting fault of power battery of vehicle
CN102652268A (en) * 2010-08-31 2012-08-29 松下电器产业株式会社 Battery power supply device and battery power supply system
CN102680900A (en) * 2011-03-14 2012-09-19 三星Sdi株式会社 Test device of battery pack and method of driving the same
CN102680900B (en) * 2011-03-14 2015-08-05 三星Sdi株式会社 The proving installation of power brick and drive the method for this proving installation
CN102967788B (en) * 2011-09-01 2015-07-22 比亚迪股份有限公司 Line broken detection circuit of battery and detection method thereof
CN102967788A (en) * 2011-09-01 2013-03-13 比亚迪股份有限公司 Line broken detection circuit of battery and detection method thereof
CN102723754B (en) * 2012-06-01 2014-10-15 惠州市亿能电子有限公司 Identifying circuit and identifying method of broken line of battery pack acquisition line of battery management system
CN102723754A (en) * 2012-06-01 2012-10-10 惠州市亿能电子有限公司 Identifying circuit and identifying method of broken line of battery pack acquisition line of battery management system
CN103674454A (en) * 2012-09-24 2014-03-26 微宏动力系统(湖州)有限公司 Battery-pack leakage-liquid detection system
US9835688B2 (en) 2012-12-21 2017-12-05 Byd Company Limited Battery-pack fault detecting device and method for detecting fault of battery-pack
CN103884988A (en) * 2012-12-21 2014-06-25 比亚迪股份有限公司 Battery pack fault detection device and detection method
CN104749523A (en) * 2013-12-25 2015-07-01 天维讯达无线电设备检测(北京)有限责任公司 Device for acquiring electrical characteristics of lithium battery pack
CN105620291A (en) * 2015-12-25 2016-06-01 北京新能源汽车股份有限公司 Battery voltage detecting method, equipment and device and battery management system
CN105620291B (en) * 2015-12-25 2018-03-23 北京新能源汽车股份有限公司 Detect method, unit and the battery management system of cell voltage
CN106772082A (en) * 2016-12-23 2017-05-31 惠州市蓝微新源技术有限公司 A kind of voltage acquisition line wire break detection method of cell
CN106908729A (en) * 2017-01-20 2017-06-30 安徽优旦科技有限公司 A kind of hand-hold type power battery PACK testers and its control method
CN106908729B (en) * 2017-01-20 2019-08-09 安徽优旦科技有限公司 A kind of hand-hold type power battery PACK tester and its control method
CN107957559A (en) * 2017-12-12 2018-04-24 国家电网公司 A kind of battery voltage measuring device and method

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Granted publication date: 20090916

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