CN108872841A - The detection system of relay for battery pack - Google Patents
The detection system of relay for battery pack Download PDFInfo
- Publication number
- CN108872841A CN108872841A CN201810572035.0A CN201810572035A CN108872841A CN 108872841 A CN108872841 A CN 108872841A CN 201810572035 A CN201810572035 A CN 201810572035A CN 108872841 A CN108872841 A CN 108872841A
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- Prior art keywords
- resistance
- voltage
- relay
- battery pack
- signal
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- 238000001514 detection method Methods 0.000 title claims abstract description 34
- 230000008878 coupling Effects 0.000 claims description 8
- 238000010168 coupling process Methods 0.000 claims description 8
- 238000005859 coupling reaction Methods 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000006837 decompression Effects 0.000 description 4
- 238000007599 discharging Methods 0.000 description 4
- 238000004146 energy storage Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3277—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches
- G01R31/3278—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches of relays, solenoids or reed switches
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The present invention provides a kind of detection systems of relay for battery pack, belong to the technical field of the fault detection of relay.The detection system includes：First bleeder circuit, for detecting the first voltage between the anode of battery pack and cathode；Second bleeder circuit, for detecting the second voltage between the cathode of battery pack and the anode of load；Processor in the case where relay is attracted and is disconnected, judging whether relay work is normal, and in the case where determining relay operation irregularity, and is sent a warning message.The detection system can the adhesion state to the contact of the relay in power battery pack circuit detect, security risk caused by preventing because of relay contact adhesion.
Description
Technical field
The present invention relates to the technical fields of the fault detection of relay, more particularly to a kind of relay for battery pack
Detection system.
Background technique
It is influenced by energy crisis and environmental crisis, pure electric automobile and energy storage industry are quickly grown.Lithium battery is with it
The advantages such as high-energy density, long-life and the feature of environmental protection are increasingly becoming the major impetus or energy of pure electric automobile and battery energy storage
Measure source.Battery pack is generally controlled by large size relay in practical charge and discharge process, due to vehicle mounted dynamic battery group
And the capacity and voltage of large-scale energy-storage battery group are higher, the electric current of moment is also larger, and charge and discharge control relay is caused to be deposited
After phenomenon of arc discharge, long-time service, may result in relay contact adhesion, can not normal disjunction, influence electric car and
The normal work of energy-storage system.Therefore the relay contact adhesion situation in circuit need to be detected, is prevented due to relay
Security risk caused by contact adhesion.
Summary of the invention
The object of the present invention is to provide a kind of detection system of relay for battery pack, which can be to dynamic
The adhesion state of the contact of relay in power battery pack circuit is detected, safety caused by preventing because of relay contact adhesion
Risk.
To achieve the goals above, the present invention provides a kind of detection system of relay for battery pack, the detection system
System includes：First bleeder circuit, for detecting the first voltage between the anode of battery pack and cathode；Second bleeder circuit is used
Second voltage between the cathode of detection battery pack and the anode of load；Processor is used for：The control of output relay is believed
Number, control signal includes pickup signal and cut-off signal；Control signal be pickup signal in the case where, judge first voltage and
Whether the absolute value of the difference between second voltage is less than or equal to error margin；Judging between first voltage and second voltage
In the case that the absolute value of difference is less than or equal to error margin, determine that relay is working properly；Judging first voltage and second
In the case that the absolute value of difference between voltage is greater than error margin, relay operation irregularity is determined, and send a warning message；
In the case where controlling signal is cut-off signal, judge whether the absolute value of second voltage is less than or equal to error margin；Judging
In the case that the absolute value of second voltage is less than or equal to error margin, determine that relay is working properly；Judging second voltage
In the case that absolute value is greater than error margin, relay operation irregularity is determined, and send a warning message.
Optionally, the first bleeder circuit include first resistor, second resistance, 3rd resistor, the 4th resistance, the 5th resistance,
First controllable switch, the second controllable switch and the first signal comparator, one end of first resistor and the anode of battery pack connect, separately
One end is connect with one end of the first controllable switch, and the other end of the first controllable switch and one end of 3rd resistor connect, third electricity
The other end of resistance is connect with one end of the 5th resistance；One end of second resistance and the cathode of battery pack connect, the other end and second
One end of controllable switch connects, and the other end of the second controllable switch is connect with one end of the 4th resistance, the other end of the 4th resistance
It is connect with one end of the 5th resistance, the other end ground connection of the 5th resistance；The normal phase input end of first signal comparator and second can
Node connection between control switch and the 4th resistance, the node between inverting input terminal and the first controllable switch and 3rd resistor connect
It connects, output end is connect with processor.
Optionally, the first bleeder circuit further includes be connected between the output end and processor of the first signal comparator
One analog-digital converter and the first magnetic coupling isolator.
Optionally, the second bleeder circuit include the 6th resistance, the 7th resistance and second signal comparator, the one of the 6th resistance
It holds and is connect with the anode of load, the other end is connect with one end of the 7th resistance, the other end of the 7th resistance and the cathode of battery pack
Connection；Node connection between the normal phase input end of second signal comparator and the 6th resistance and the 7th resistance, inverting input terminal
It is connect with the cathode of battery pack, output end is connect with processor.
Optionally, the second bleeder circuit further includes be connected between the output end and processor of second signal comparator
Two analog-digital converters and the second magnetic coupling isolator.
Through the above technical solutions, the first bleeder circuit and the second bleeder circuit of the detection system detect battery pack respectively
Anode and cathode between first voltage and battery pack cathode and load anode between second voltage, and by comparing
The difference of first voltage and second voltage come judge relay contact whether adhesion, caused by preventing because of relay contact adhesion
Security risk.
Other features and advantages of the present invention will the following detailed description will be given in the detailed implementation section.
Detailed description of the invention
The drawings are intended to provide a further understanding of the invention, and constitutes part of specification, with following tool
Body embodiment is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings：
Fig. 1 shows the power battery charging and discharging circuit of one embodiment of the present invention；
Fig. 2 is the flow chart of the detection method of the relay for battery pack according to an embodiment of the present invention；
Fig. 3 is the structural representation of the detection system of the relay for battery pack according to an embodiment of the present invention
Figure.
Specific embodiment
Below in conjunction with attached drawing, detailed description of the preferred embodiments.It should be understood that this place is retouched
The specific embodiment stated is merely to illustrate and explain the present invention, and is not intended to restrict the invention.
Fig. 1 shows the power battery charging and discharging circuit of one embodiment of the present invention.As shown in Figure 1, power battery fills
Discharge loop includes battery pack, load and relay K1, and the cathode a- of battery pack and the cathode b- connection of load, relay K1 connect
It connects between the positive a+ of battery pack and the positive b+ of load.Using the relay K1 in Fig. 1 as test object, illustrate of the invention
The detection system and detection method of relay for battery pack.
Fig. 2 is the flow chart of the detection method of the relay for battery pack according to an embodiment of the present invention.Such as
Shown in Fig. 2, a kind of detection method of relay for battery pack, the detection side are provided in one embodiment of the present invention
Method may include：
In step s101, the first voltage V1 between the positive a+ of battery pack and cathode a- is detected；And battery pack
Second voltage V2 between cathode a- and the positive b+ of load；
In step s 102, processor 30 exports the control signal for controlling relay K1, and control signal includes being attracted
Signal and cut-off signal, the contact for being respectively used to control relay K1 are attracted and disconnect；
In step s 103, the control signal that decision processor 30 exports is pickup signal or cut-off signal；
In step S104, in the case where judging to control signal as pickup signal, the electricity of first voltage V1 and second is judged
Whether the absolute value of the difference between pressure V2 is less than or equal to error margin α；
The case where the absolute value for judging the difference between first voltage V1 and second voltage V2 is less than or equal to error margin α
Under, i.e., | V1-V2 | in the case where≤α, determine that relay K1 is working properly；
In step s105, the absolute value for judging the difference between first voltage V1 and second voltage V2 be greater than error more than
In the case where measuring α, i.e., | V1-V2 | in the case where > α, determine relay K1 operation irregularity, and send a warning message；
In step s 106, in the case where judging to control signal as cut-off signal, judge the absolute value of second voltage V2
Whether error margin α is less than or equal to；
I.e. in the case where judging that the absolute value of second voltage V2 is less than or equal to error margin α | V2 | in the case where≤α,
Determine that relay K1 is working properly；
In step s 107, in the case where judging that the absolute value of second voltage V2 is greater than error margin α, i.e., | V2 | > α
In the case where, determine relay K1 operation irregularity, and send a warning message.
Error margin α for example can be according to harness resistance, electric current and the voltage detecting in power battery charging and discharging circuit
Range determines that error margin can be for example any one numerical value between 2%~3% in one embodiment of the present invention.
Step-up error surplus α can prevent from detecting mistake caused by the voltage detection error in charging and discharging circuit.
First voltage and second voltage can for example be detected by the first bleeder circuit and the second bleeder circuit respectively.Detection
First voltage between the positive a+ and cathode a- of battery pack can specifically include：
Detect the cathode voltage and cathode voltage of battery pack；
Cathode voltage and cathode voltage to battery pack carry out decompression processing；
The difference between the cathode voltage and cathode voltage by decompression treated battery pack is calculated, to obtain the first electricity
Pressure.
The second voltage detected between the cathode a- of battery pack and the positive b+ of load can specifically include：
Detect the cathode voltage of battery pack and the cathode voltage of load；
The cathode voltage of cathode voltage and load to battery pack carries out decompression processing；
It calculates by the decompression difference that treated between the cathode voltage of battery pack and the cathode voltage of load, to obtain
Second voltage.
In one embodiment of the present invention, detecting first voltage between the positive a+ of battery pack and cathode a- can be with
Including：Analog-to-digital conversion is carried out to first voltage and the isolation of magnetic coupling is carried out to the first voltage after analog-to-digital conversion；Detect battery
Group cathode a- and load positive b+ between second voltage can also include：Analog-to-digital conversion is carried out to second voltage and to warp
Second voltage after crossing analog-to-digital conversion carries out the isolation of magnetic coupling.
In one embodiment of the present invention, a kind of computer readable storage medium is additionally provided, this is computer-readable to deposit
Instruction is stored on storage media, which is used for so that computer executes any one above-mentioned and is used for the relay of battery pack
Detection method.
Fig. 3 is the structural representation of the detection system of the relay for battery pack according to an embodiment of the present invention
Figure.As shown in figure 3, a kind of detection system of relay for battery pack is provided in one embodiment of the present invention, it should
Detection system may include：
First bleeder circuit 10, for detecting the first voltage between the positive a+ of battery pack and cathode a-；
Second bleeder circuit 20, for detecting the second voltage between the cathode a- of battery pack and the positive b+ of load；
Processor 30, is used for：
The control signal for controlling relay is exported, control signal includes pickup signal and cut-off signal；
In the case where controlling signal is pickup signal, the absolute value of the difference between first voltage and second voltage is judged
Whether error margin is less than or equal to；
In the case where judging that the absolute value of the difference between first voltage and second voltage is less than or equal to error margin, sentence
It is working properly to determine relay；
Judge the difference between first voltage and second voltage absolute value be greater than error margin in the case where, determine after
Electrical work is abnormal, and sends a warning message；
In the case where controlling signal is cut-off signal, judge whether the absolute value of second voltage is less than or equal to more than error
Amount；
In the case where judging that the absolute value of second voltage is less than or equal to error margin, determine that relay is working properly；
In the case where judging that the absolute value of second voltage is greater than the error margin, relay operation irregularity is determined, and
It sends a warning message.
In one embodiment of the present invention, the first bleeder circuit 10 includes first resistor R1, second resistance R2, third electricity
R3, the 4th resistance R4, the 5th resistance R5, the first controllable switch S1, the second controllable switch S2 and the first signal comparator 11 are hindered, the
One end of one resistance R1 and the positive a+ connection of battery pack, the other end are connect with one end of the first controllable switch S1, and first is controllable
The other end of switch S1 is connect with one end of 3rd resistor R3, and one end of the other end of 3rd resistor R3 and the 5th resistance R5 connect
It connects；One end of second resistance R2 and the cathode a- connection of battery pack, the other end are connect with one end of the second controllable switch S2, and second
The other end of controllable switch S2 is connect with one end of the 4th resistance R4, the other end of the 4th resistance R4 and one end of the 5th resistance R5
Connection, the other end ground connection of the 5th resistance R5；The normal phase input end of first signal comparator 11 and the second controllable switch S2 and
Node connection between four resistance R4, the node connection between inverting input terminal and the first controllable switch S1 and 3rd resistor R3,
Output end is connect with processor 30.
First resistor R1 for example may include multiple concatenated resistance.
Second bleeder circuit 20 includes the 6th resistance R6, the 7th resistance R7 and second signal comparator 21, the 6th resistance R6
One end and load positive b+ connection, the other end connect with one end of the 7th resistance R7, the other end and electricity of the 7th resistance R7
The cathode a- connection of pond group；Section between the normal phase input end of second signal comparator 21 and the 6th resistance R6 and the 7th resistance R7
Point connection, the cathode a- connection of inverting input terminal and battery pack, output end are connect with processor 30.
6th resistance R6 for example may include multiple concatenated resistance.
In one embodiment of the present invention, the first bleeder circuit 10 for example can also include being connected to the first signal to compare
The first analog-digital converter 12 and the first magnetic coupling isolator 13 between the output end and processor 30 of device 11.Second bleeder circuit 20
It such as can also include the second analog-digital converter 22 being connected between the output end of second signal comparator 21 and processor 30
With the second magnetic coupling isolator 23.
Through the above technical solutions, between the anode and cathode of the detection system or detection method by detection battery pack
First voltage and battery pack cathode and load anode between second voltage, and compare first voltage and second voltage
Difference come judge relay contact whether adhesion, security risk caused by preventing because of relay contact adhesion.
Optional embodiment of the invention is described in detail in conjunction with attached drawing above, still, the present invention is not limited to it is above-mentioned can
The detail in embodiment is selected, within the scope of the technical concept of the present invention, technical solution of the present invention can be carried out more
Kind simple variant, these simple variants all belong to the scope of protection of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case where shield, it can be combined in any appropriate way.In order to avoid unnecessary repetition, embodiment of the present invention
To various combinations of possible ways, no further explanation will be given.
It will be appreciated by those skilled in the art that realizing that all or part of the steps in above embodiment is can to pass through journey
Sequence is completed to instruct relevant hardware, which is stored in a storage medium, including some instructions are used so that one
The whole of (can be single-chip microcontroller, chip etc.) or processor (processor) execution each embodiment the method for the application
Or part steps.And storage medium above-mentioned includes：USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only
Memory), random access memory (RAM, Random Access Memory), magnetic or disk etc. are various can store journey
The medium of sequence code.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention embodiment equally should be considered as embodiment of the present invention disclosure of that.
Claims (5)
1. a kind of detection system of the relay for battery pack, which is characterized in that including：
First bleeder circuit, the first voltage between anode and cathode for detecting the battery pack；
Second bleeder circuit, for detecting the second voltage between the cathode of the battery pack and the anode of load；
Processor is used for：
The control signal of the relay is exported, the control signal includes pickup signal and cut-off signal；
In the case where the control signal is the pickup signal, judge between the first voltage and the second voltage
Whether the absolute value of difference is less than or equal to error margin；
The case where the absolute value for judging the difference between the first voltage and the second voltage is less than or equal to error margin
Under, determine that the relay is working properly；
In the case where judging that the absolute value of the difference between the first voltage and the second voltage is greater than error margin, sentence
The fixed relay operation irregularity, and send a warning message；
In the case where the control signal is the cut-off signal, judge whether the absolute value of the second voltage is less than or equal to
The error margin；
In the case where judging that the absolute value of the second voltage is less than or equal to the error margin, the relay work is determined
Normally；
In the case where judging that the absolute value of the second voltage is greater than the error margin, determine that the relay work is different
Often, it and sends a warning message.
2. detection system according to claim 1, which is characterized in that first bleeder circuit includes first resistor,
Two resistance, 3rd resistor, the 4th resistance, the 5th resistance, the first controllable switch, the second controllable switch and the first signal comparator,
One end of the first resistor is connect with the anode of the battery pack, and the other end is connect with one end of first controllable switch,
The other end of first controllable switch is connect with one end of the 3rd resistor, the other end of the 3rd resistor and described the
One end of five resistance connects；One end of the second resistance is connect with the cathode of the battery pack, and the other end and described second can
One end connection of control switch, the other end of second controllable switch are connect with one end of the 4th resistance, the 4th electricity
The other end of resistance is connect with one end of the 5th resistance, the other end ground connection of the 5th resistance；First signal compares
Between the normal phase input end of device and second controllable switch and the 4th resistance node connection, inverting input terminal with it is described
Node connection between first controllable switch and the 3rd resistor, output end are connected to the processor.
3. detection system according to claim 2, which is characterized in that first bleeder circuit further include be connected to it is described
The first analog-digital converter and the first magnetic coupling isolator between the output end of first signal comparator and the processor.
4. detection system according to claim 3, which is characterized in that second bleeder circuit includes the 6th resistance, the
Seven resistance and second signal comparator, one end of the 6th resistance connects with the anode of the load, the other end and described the
One end of seven resistance connects, and the other end of the 7th resistance is connect with the cathode of the battery pack；The second signal compares
Node connection between the normal phase input end of device and the 6th resistance and the 7th resistance, inverting input terminal and the battery
The cathode connection of group, output end are connected to the processor.
5. detection system according to claim 4, which is characterized in that second bleeder circuit further include be connected to it is described
The second analog-digital converter and the second magnetic coupling isolator between the output end of second signal comparator and the processor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810572035.0A CN108872841A (en) | 2018-06-05 | 2018-06-05 | The detection system of relay for battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810572035.0A CN108872841A (en) | 2018-06-05 | 2018-06-05 | The detection system of relay for battery pack |
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| Publication Number | Publication Date |
|---|---|
| CN108872841A true CN108872841A (en) | 2018-11-23 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201810572035.0A Pending CN108872841A (en) | 2018-06-05 | 2018-06-05 | The detection system of relay for battery pack |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109521361A (en) * | 2019-01-18 | 2019-03-26 | 上海熠动动力科技有限公司 | A kind of relay contact adhesion detection circuit and its detection device |
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| CN106546915A (en) * | 2016-10-27 | 2017-03-29 | 简式国际汽车设计（北京）有限公司 | A kind of high-voltage relay adhesion state detection circuit and system |
| CN106842006A (en) * | 2016-12-27 | 2017-06-13 | 安徽力高新能源技术有限公司 | A kind of relay adhesion detection method |
| CN208367170U (en) * | 2018-06-05 | 2019-01-11 | 安徽锐能科技有限公司 | The detection system of relay for battery pack |
-
2018
- 2018-06-05 CN CN201810572035.0A patent/CN108872841A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101718842A (en) * | 2009-12-11 | 2010-06-02 | 北汽福田汽车股份有限公司 | Monitoring method and monitoring system for touch switch |
| CN102175971A (en) * | 2011-02-18 | 2011-09-07 | 奇瑞汽车股份有限公司 | Relay state detection method and device of electric vehicle high-voltage system |
| CN106546915A (en) * | 2016-10-27 | 2017-03-29 | 简式国际汽车设计（北京）有限公司 | A kind of high-voltage relay adhesion state detection circuit and system |
| CN106842006A (en) * | 2016-12-27 | 2017-06-13 | 安徽力高新能源技术有限公司 | A kind of relay adhesion detection method |
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| CN109521361A (en) * | 2019-01-18 | 2019-03-26 | 上海熠动动力科技有限公司 | A kind of relay contact adhesion detection circuit and its detection device |
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