CN208672781U - A kind of battery insulation state monitoring module - Google Patents
A kind of battery insulation state monitoring module Download PDFInfo
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- CN208672781U CN208672781U CN201820468417.4U CN201820468417U CN208672781U CN 208672781 U CN208672781 U CN 208672781U CN 201820468417 U CN201820468417 U CN 201820468417U CN 208672781 U CN208672781 U CN 208672781U
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Abstract
It includes voltage sampling circuit and sampled signal amplifying circuit that the utility model, which discloses a kind of battery insulation state monitoring module, and voltage sampling circuit part is divided into Insulation monitoring voltage comparator circuit and Insulation monitoring auxiliary parallel circuit again.Sampling A/D chip is isolated using high-accuracy voltage in Insulation monitoring voltage comparator circuit, sampling is carried out to divider resistance both end voltage and is transmitted to single-chip microcontroller, by analytical calculation battery always just over the ground between voltage and battery always bear the voltage between over the ground, this circuit is equivalent to a voltmeter.The utility model integrates space-saving effect by carrying out splicing to reach between master control, and accident provides advantageous guarantee caused by monitoring the insulation situation of battery system in real time to exempt because of electric leakage.
Description
Technical field
The utility model relates to power battery field more particularly to battery cell monitoring technologies.
Background technique
Electrokinetic cell system can generate certain leakage current in independent operating and cooperation vehicle operational process, corresponding different
The high pressure of grade generates the of different sizes of leakage current, it is therefore desirable to be monitored in real time to the electric leakage situation of battery system, i.e., in fact
When judge that battery system is bearing the resistance value size between over the ground over the ground and always just always whether to measure effect of leakage in tolerance interval
It is interior.In addition, whether the national regulations electrokinetic cell system class of insulation, which meets the requirements, determines whether the electrokinetic cell system can be with
It is put into use.
Currently, tentatively being considered due to battery is to be designed according to 600V and system above for standard, to always too low
System, the insulating resistance value finally monitored can have a biggish error, due to adopting under the interference such as high current or noise, electric wave
Sample signal is too small, is easy to produce fluctuation, influences finally obtained result.
Between this, need to choose the higher sampling resistor of precision in the resistance type selecting stage, also can not the cost free upper limit into
Row type selecting；Insulation monitoring part is designed at this stage and is spliced with master control, integration uses, since the part real-time monitoring is high
Road is pushed back, the later period not can guarantee the design after certain component failures, can or can not have an impact to low-pressure section, so as to cause
The paralysis of whole system.Therefore need consider whether by this element independent design at a module, then with system carry out
With use.
Utility model content
Technical problem to be solved in the utility model be realize a kind of autonomous working, and can existing battery system carry out
Battery insulation state monitoring module with work.
To achieve the goals above, the technical solution adopted in the utility model is a kind of battery insulation state monitoring module,
Insulation monitoring assists parallel circuit to obtain shell power on signal, and the electric signal of acquisition is passed through Insulation monitoring voltage comparator circuit
It is delivered to single-chip microcontroller.
It is respectively the total anode for connecting the total anode of battery, company that the Insulation monitoring auxiliary parallel circuit, which is set there are three input terminal,
Total negative terminal of the total cathode of battery and the shell end of connected with outer casing are connect, total anode passes through switch Q1 and switch Q2 in parallel
Connected with outer casing end, total negative terminal pass through switch Q3 in parallel and switch Q4 connected with outer casing end.
The both ends the switch Q1 are in series with resistance R1 respectively and the both ends resistance R3, the switch Q2 are in series with resistance R2 respectively
With resistance R4, the both ends the switch Q3 are in series with resistance R5 respectively and the both ends resistance R7, the switch Q4 are in series with resistance respectively
R6 and resistance R7.
The resistance R1 resistance value is 10.8M Ω, and the resistance R3 resistance value is 4K Ω, and the resistance R2 resistance value is 224K Ω,
The resistance R4 resistance value is 1K Ω, and the resistance R5 resistance value is 4K Ω, and the resistance R7 resistance value is 10.8M Ω, the resistance R6
Resistance value is 1K Ω, and the resistance R8 resistance value is 224K Ω.
The Insulation monitoring voltage comparator circuit is that sampling A/D chip is isolated in four independent voltages, and wherein first voltage is isolated
Sampling A/D chip input terminal accesses between switch Q1 and resistance R3, and exports electric signal V1 to processor, and wherein second voltage is isolated
Sampling A/D chip input terminal accesses between switch Q2 and resistance R4, and exports electric signal V3 to processor, and wherein tertiary voltage is isolated
Sampling A/D chip input terminal accesses between switch Q3 and resistance R5, and exports electric signal V2 to processor, wherein the 4th voltage is isolated
Sampling A/D chip input terminal accesses between switch Q4 and resistance R6, and exports electric signal V4 to processor.
The switch Q1, switch Q2, switch Q3 and switch Q4 are light coupling relay, and the processor output channel signal is extremely
Each light coupling relay.
The utility model integrates space-saving effect by carrying out splicing to reach between master control, monitors battery system in real time
The insulation situation of system for exempt because electric leakage caused by accident provide advantageous guarantee.
Detailed description of the invention
The content of width attached drawing every in the utility model specification expression is briefly described below:
Fig. 1 is battery insulation state monitoring module circuit diagram.
Specific embodiment
As shown in Figure 1, battery insulation state monitoring module hardware design composition includes: voltage sampling circuit and sampled signal
Amplifying circuit, wherein voltage sampling circuit part is divided into again: Insulation monitoring voltage comparator circuit and Insulation monitoring auxiliary electricity in parallel
Road.Sampling A/D chip is isolated using high-accuracy voltage in Insulation monitoring voltage comparator circuit, samples to divider resistance both end voltage
Be transmitted to single-chip microcontroller, by analytical calculation battery always just over the ground between voltage and battery always bear over the ground between voltage, this electricity
Road is equivalent to a voltmeter.Judgement obtains the higher one side of voltage, then accesses Insulation monitoring auxiliary parallel circuit and pass through optocoupler
Resistance of the relay one group of resistance value of parallel connection between 100 Ω/V~500 Ω/V, reads again isolation sampling A/D chip and is transferred to monolithic
The numerical value of machine, carries out analytical calculation and finally obtains the insulation resistance resistance value of voltage lower end judging whether to meet the requirements, then to master
Controller conveys information to judge processing.
Above-mentioned monitoring modular main program logic: Q1, Q3 two switches of closure detect the voltage V1 between total face shell
It bears with total to the voltage V2 between shell, two voltages is compared, be closed Q2 if always just side is higher over the ground, detection obtains
Voltage V3 seeks formula according to national standard insulation resistance by Given information and acquires total insulation resistance born between over the ground, with national standard
It is required that being compared, judge whether that normally whether system, which may continue to, runs；If measure total bear surveys higher closure Q4 over the ground, examine
Measure voltage V4, by Given information according to national standard insulation resistance seek formula acquire it is total just over the ground between insulation resistance,
It is compared with national standard, judges whether that normally whether system, which may continue to, runs.It data read time interval can be according to need
It asks and is set.The carrying out of above-mentioned steps needs to complete to execute logic loops, circuit system and battery system after hardware connection powers on
The matching of system is mainly realized by corresponding connector.
The present invention is exemplarily described above in conjunction with attached drawing, it is clear that the utility model implements not by above-mentioned
The limitation of mode, as long as using the improvement for the various unsubstantialities that the inventive concept and technical scheme of the present invention carry out, or not
It is improved the conception and technical scheme of the invention are directly applied to other occasions, the protection scope of the utility model it
It is interior.
Claims (4)
1. a kind of battery insulation state monitoring module, it is characterised in that: Insulation monitoring assists parallel circuit to obtain telecommunications on shell
Number, and the electric signal of acquisition is delivered to single-chip microcontroller by Insulation monitoring voltage comparator circuit；
It is respectively the total anode for connecting the total anode of battery, connection electricity that the Insulation monitoring auxiliary parallel circuit, which is set there are three input terminal,
Total negative terminal of the total cathode of Chi and the shell end of connected with outer casing, total anode are connected by switch Q1 in parallel with switch Q2
Shell end, total negative terminal pass through switch Q3 in parallel and switch Q4 connected with outer casing end；
The Insulation monitoring voltage comparator circuit is that sampling A/D chip is isolated in four independent voltages, wherein first voltage isolation sampling
Chip input terminal accesses between switch Q1 and resistance R3, and exports electric signal V1 to processor, wherein second voltage isolation sampling
Chip input terminal accesses between switch Q2 and resistance R4, and exports electric signal V3 to processor, wherein tertiary voltage isolation sampling
Chip input terminal accesses between switch Q3 and resistance R5, and exports electric signal V2 to processor, wherein the isolation sampling of the 4th voltage
Chip input terminal accesses between switch Q4 and resistance R6, and exports electric signal V4 to processor.
2. battery insulation state monitoring module according to claim 1, it is characterised in that: the switch Q1 goes here and there at both ends respectively
It is associated with resistance R1 and the both ends resistance R3, the switch Q2 is in series with resistance R2 and resistance R4, the both ends switch Q3 difference respectively
It is in series with resistance R5 and the both ends resistance R7, the switch Q4 is in series with resistance R6 and resistance R7 respectively.
3. battery insulation state monitoring module according to claim 2, it is characterised in that: the resistance R1 resistance value is
10.8M Ω, the resistance R3 resistance value are 4K Ω, and the resistance R2 resistance value is 224K Ω, and the resistance R4 resistance value is 1K Ω, described
Resistance R5 resistance value is 4K Ω, and the resistance R7 resistance value is 10.8M Ω, and the resistance R6 resistance value is 1K Ω, the resistance R8 resistance value
For 224K Ω.
4. battery insulation state monitoring module according to claim 1, it is characterised in that: the switch Q1, switch Q2, open
Closing Q3 and switch Q4 is light coupling relay, the processor output channel signal to each light coupling relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820468417.4U CN208672781U (en) | 2018-03-30 | 2018-03-30 | A kind of battery insulation state monitoring module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820468417.4U CN208672781U (en) | 2018-03-30 | 2018-03-30 | A kind of battery insulation state monitoring module |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110095651A (en) * | 2019-05-13 | 2019-08-06 | 奇瑞新能源汽车技术有限公司 | A kind of online insulating resistor detecting circuit of power battery |
| CN111929501A (en) * | 2019-05-13 | 2020-11-13 | 上海海拉电子有限公司 | Insulation resistance value change detection circuit, insulation detection system and method |
| CN111929502A (en) * | 2019-05-13 | 2020-11-13 | 上海海拉电子有限公司 | Insulation detection circuit and method |
-
2018
- 2018-03-30 CN CN201820468417.4U patent/CN208672781U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110095651A (en) * | 2019-05-13 | 2019-08-06 | 奇瑞新能源汽车技术有限公司 | A kind of online insulating resistor detecting circuit of power battery |
| CN111929501A (en) * | 2019-05-13 | 2020-11-13 | 上海海拉电子有限公司 | Insulation resistance value change detection circuit, insulation detection system and method |
| CN111929502A (en) * | 2019-05-13 | 2020-11-13 | 上海海拉电子有限公司 | Insulation detection circuit and method |
| CN111929501B (en) * | 2019-05-13 | 2023-04-25 | 上海海拉电子有限公司 | Insulation resistance change detection circuit, insulation detection system and method |
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