CN107144735A - A kind of batteries of electric automobile group insulaion resistance detecting system, method and electric automobile - Google Patents
A kind of batteries of electric automobile group insulaion resistance detecting system, method and electric automobile Download PDFInfo
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- CN107144735A CN107144735A CN201710316037.9A CN201710316037A CN107144735A CN 107144735 A CN107144735 A CN 107144735A CN 201710316037 A CN201710316037 A CN 201710316037A CN 107144735 A CN107144735 A CN 107144735A
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- voltage
- electric automobile
- batteries
- insulaion resistance
- resistance
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/025—Measuring very high resistances, e.g. isolation resistances, i.e. megohm-meters
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- 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
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/385—Arrangements for measuring battery or accumulator variables
Abstract
The present invention proposes a kind of batteries of electric automobile group insulaion resistance detecting system, method and electric automobile.Detecting system includes：First known measurement resistance, the insulaion resistance with positive battery terminal is in parallel；Second known measurement resistance, the insulaion resistance with negative battery terminal is in parallel；First switch, with the first known measurement resistant series；Second switch, with the second known measurement resistant series.The present invention proposes a kind of adaptive insulaion resistance detection scheme of high-pressure system parasitic capacitance, it is to avoid the adverse effect that parasitic capacitance is detected to insulaion resistance, can accurately measure insulating resistance value.
Description
Technical field
The present invention relates to automobile technical field, system is detected more particularly, to a kind of batteries of electric automobile group insulaion resistance
System, method and electric automobile.
Background technology
Energy shortage, oil crisis and environmental pollution grow in intensity, and the life given people brings tremendous influence, direct relation
To the sustainable development of national economy and society.Countries in the world are all in active development new energy technology.Electric automobile is used as one kind
Reduce consumption of petroleum, low stain, the new-energy automobile of low noise, it is considered to be solve the important way of energy crisis and environmental degradation
Footpath.Hybrid vehicle takes into account the advantage of pure electric automobile and traditional combustion engine automobile simultaneously, is meeting vehicle dynamic quality requirement
On the premise of continual mileage requirement, fuel economy is effectively improved, discharge is reduced, it is considered to be currently saves and subtracts
One of active path of row.
The power battery pack insulating properties of electric automobile is extremely important.If insulating properties, which declines, to cause prestige to occupant safety
The side of body, therefore, battery management system need the insulation situation of monitoring power battery pack in real time, it is to avoid Personal Risk.
At present, detection power battery pack insulation status has two ways：Active method and passive means.Active method detects circuit knot
Structure is complicated, and cost is high, and development difficulty is big, and increasing scheme performs Insulation monitoring using passive means.However, when battery high pressure
When system is larger to car body parasitic capacitance, due to the charging and discharging effects of electric capacity, passive means is caused to detect that circuit can not accurate and effective
Measurement insulating resistance value.
The content of the invention
The purpose of the present invention is to propose to a kind of batteries of electric automobile group insulaion resistance detecting system, method and electric automobile,
The adverse effect that reduction high-pressure system parasitic capacitance is detected to insulaion resistance, so as to accurately measure insulating resistance value.
A kind of batteries of electric automobile group insulaion resistance detecting system, including：
First known measurement resistance, the insulaion resistance with positive battery terminal is in parallel；
Second known measurement resistance, the insulaion resistance with negative battery terminal is in parallel；
First switch, with the first known measurement resistant series；
Second switch, with the second known measurement resistant series.
In one embodiment, the first switch includes：Optical relay, mechanical relay, triode or metal
Oxide semiconductor field effect transistor.
In one embodiment, the second switch includes：Optical relay, mechanical relay, triode or metal
Oxide semiconductor field effect transistor.
A kind of batteries of electric automobile group insulaion resistance detection method, the batteries of electric automobile group that this method is applied to as above is exhausted
Edge resistance detecting circuit, this method includes：
First switch and second switch are disconnected, voltage and battery of the positive battery terminal to vehicle electrical platform are measured respectively
Voltage of the negative terminal to vehicle electrical platform is organized, and determines voltage measuring value larger side；
The switch of sealing voltage measured value larger side, voltage measuring value larger side is repeatedly measured based on predetermined time of repose
Terminal to the voltage of vehicle electrical platform, wherein calculating total time of repose when judging measurement voltage stabilization；
Based on total time of repose, batteries of electric automobile group insulaion resistance is calculated.
In one embodiment, it is described to judge that measurement voltage stabilization includes：
When the difference between voltage of the adjacent terminal measure twice, voltage measuring value larger side to vehicle electrical platform is small
When predetermined value, measurement voltage stabilization is judged.
In one embodiment, the predetermined value is less than 5 volts.
In one embodiment, the predetermined value is 2 volts.
In one embodiment, described to be based on total time of repose, calculating batteries of electric automobile group insulaion resistance includes：
First switch and second switch are disconnected, voltage and battery of the positive battery terminal to vehicle electrical platform are measured respectively
Voltage of the negative terminal to vehicle electrical platform is organized, and determines voltage measuring value larger side；
The switch of sealing voltage measured value larger side, the terminal pair of voltage measuring value larger side is measured based on total time of repose
The voltage of the voltage of vehicle electrical platform and the terminal of voltage measuring value smaller side to vehicle electrical platform；
Switch based on sealing voltage measured value larger side and the known measurement resistance, the voltage measuring value larger side that are connected to
Terminal to the voltage of the voltage of vehicle electrical platform and the terminal of voltage measuring value smaller side to vehicle electrical platform, calculate electronic vapour
Car battery pack insulaion resistance.
A kind of electric automobile, includes batteries of electric automobile group insulaion resistance detecting system as described above.
In one embodiment, the electric automobile includes pure electric automobile, hybrid vehicle or fuel cell vapour
Car.
It can be seen from the above technical proposal that in embodiments of the present invention, detecting system includes：First known measurement electricity
Resistance, the insulaion resistance with positive battery terminal is in parallel；Second known measurement resistance, the insulaion resistance with negative battery terminal
It is in parallel；First switch, with the first known measurement resistant series；Second switch, with the second known measurement resistant series.Pin of the present invention
Influence to parasitic capacitance to Insulation monitoring loop, proposes a kind of adaptive Insulation monitoring scheme of high-pressure system parasitic capacitance,
The adverse effect that parasitic capacitance is detected to insulaion resistance is avoided, so as to accurate measurement insulating resistance value.
Brief description of the drawings
The following drawings only does schematic illustration and explanation to the present invention, not delimit the scope of the invention.
Fig. 1 is the calculating process schematic diagram of batteries of electric automobile group insulaion resistance in the prior art.
Fig. 2 is the structure chart according to batteries of electric automobile group insulaion resistance detecting system of the present invention.
Fig. 3 is the exemplary circuit diagram according to batteries of electric automobile group insulaion resistance detecting system of the present invention.
Fig. 4 is the flow chart according to batteries of electric automobile group insulaion resistance detection method of the present invention.
Embodiment
In order to be more clearly understood to the technical characteristic of invention, purpose and effect, now control brief description of the drawings is of the invention
Embodiment, in the various figures identical label represent identical part.
In order to succinct and directly perceived on describing, hereafter by describing some representational embodiments come the side to the present invention
Case is illustrated.Substantial amounts of details is only used for help and understands the solution of the present invention in embodiment.However, it will be apparent that the present invention
Technical scheme can be not limited to these details when realizing.In order to avoid unnecessarily having obscured the solution of the present invention, some realities
Apply mode not described meticulously, but only give framework.Hereinafter, " comprising " refers to " include but is not limited to ", " root
According to ... " refer to " according at least to ..., but be not limited to according only to ... ".Due to the speech habits of Chinese, hereinafter without spy
When not pointing out the quantity of composition, it is meant that it can also be multiple that the composition, which can be one, or can be regarded as at least one.
Fig. 1 is the calculating process schematic diagram of batteries of electric automobile group insulaion resistance in the prior art.
As shown in figure 1, the batteries of electric automobile group insulaion resistance of prior art, which calculates method, may be referred to national standard GB/
T18384.1-2015, is calculated according to following (a), (b), (c) three steps：
Step (a)：Two terminals (i.e. positive battery terminal of vehicle-mounted chargeable energy-storage system (REESS) is measured respectively
And negative battery terminal) voltage between vehicle electrical platform.Higher voltage is defined as U1, and relatively low voltage is defined as
U1 ', accordingly, the insulaion resistance of two terminals sides is respectively Ri1And Ri2.Wherein, the insulaion resistance of U1 sides is Ri1, U1 ' sides
Insulaion resistance is Ri2。Ri1And Ri2In smaller value can be determined that insulaion resistance Ri。
Step (b)：Measurement resistance R known to addition one0With Ri1Parallel connection, measures U2 and U2 ', should during noting test
Keep stable voltage.
Step (c)：Calculate insulaion resistance Ri, method is as follows：
By R0With three voltages U1, U1 ' and U2 and substitution following formula：
Wherein, Fig. 1 left-half shows U1 and U1 ' measurement process；Fig. 1 right half part shows to add known measurement
Resistance R0With Ri1Process that is in parallel and measuring U2 and U2 '.
However, conventionally, as all there is parasitic capacitance, parasitic capacitance in battery anode and negative pole for car body
Charging and discharging effects cause detection circuit can not accurately and effectively carry out the measurement of insulating resistance value.
In embodiments of the present invention, the influence for parasitic capacitance to Insulation monitoring loop, proposes a kind of high-pressure system
Parasitic capacitance adaptive Insulation monitoring scheme, it is to avoid the influence that parasitic capacitance is detected to insulaion resistance.
Fig. 2 is the structure chart according to batteries of electric automobile group insulaion resistance detecting system of the present invention, and wherein battery pack is
Power battery pack.
As shown in Fig. 2 batteries of electric automobile group insulaion resistance detecting system, including：
First known measurement resistance, the insulaion resistance with positive battery terminal is in parallel；
Second known measurement resistance, the insulaion resistance with negative battery terminal is in parallel；
First switch, with the first known measurement resistant series；
Second switch, with the second known measurement resistant series.
Wherein, when first switch is turned on, the first known measurement resistance keeps electrically connecting with positive battery terminal；When
One when switching off, and the first known measurement resistance does not keep electrically connecting with positive battery terminal；When second switch is turned on, the
Two known measurement resistance keep electrically connecting with negative battery terminal；When second switch disconnects, the second known measurement resistance with
Negative battery terminal does not keep electrical connection.The resistance value of the resistance value of first known measurement resistance and the second known measurement resistance
It is known.And preferably, the resistance value of the first known measurement resistance is identical with the resistance value of the second known measurement resistance, from
And avoid the asymmetric caused error of circuit.
First, first switch and second switch are disconnected, voltage of the positive battery terminal to vehicle electrical platform is measured respectively
And negative battery terminal is to the voltage of vehicle electrical platform, and determine voltage measuring value larger side.Then, sealing voltage measured value
The switch of larger side, electricity of the terminal to vehicle electrical platform of voltage measuring value larger side is repeatedly measured based on predetermined time of repose
Pressure, wherein calculating total time of repose when judging measurement voltage stabilization；Based on total time of repose, batteries of electric automobile group is calculated
Insulaion resistance.During batteries of electric automobile group insulaion resistance is calculated, as the known measurement resistance R of addition0With Ri1It is in parallel
Keep standing afterwards, time of repose is the total time of repose determined, U2 and U2 ' is then measured again, and calculate insulaion resistance Ri。
Citing, disconnects first switch and second switch first, and positive battery terminal is measured respectively to vehicle electrical platform
Voltage and negative battery terminal determine voltage measuring value larger side to the voltage of vehicle electrical platform.When battery anode end
When son is more than negative battery terminal to the voltage of vehicle electrical platform to the voltage of vehicle electrical platform, positive battery terminal is closed
The switch (i.e. first switch) of side, so that the first known measurement resistance keeps electrically connecting with positive battery terminal.Then, it is based on
Predetermined time of repose repeatedly measures voltage of the positive battery terminal to vehicle electrical platform, wherein when judgement measures voltage stabilization
When calculate total time of repose；Total time of repose is based on again, calculates batteries of electric automobile group insulaion resistance.Wherein, measurement is judged
Voltage stabilization includes：When adjacent terminal (i.e. positive battery terminal) measure twice, voltage measuring value larger side is to vehicle
When difference between the voltage of level platform is less than predetermined value, measurement voltage stabilization is judged.
Illustrate again, first switch and second switch are disconnected first, positive battery terminal is measured respectively to vehicle electrical platform
Voltage and negative battery terminal to the voltage of vehicle electrical platform, and determine voltage measuring value larger side.Work as battery electrode
When terminal is more than positive battery terminal to the voltage of vehicle electrical platform to the voltage of vehicle electrical platform, battery electrode end is closed
The switch (i.e. second switch) of sub- side, so that the second known measurement resistance keeps electrically connecting with negative battery terminal.Then, base
Voltage of the negative battery terminal to vehicle electrical platform is repeatedly measured in predetermined time of repose, wherein when judgement measurement voltage is steady
Timing calculates total time of repose；Total time of repose is based on again, calculates batteries of electric automobile group insulaion resistance.Wherein, judge to survey
Amount voltage stabilization includes：When adjacent terminal (i.e. negative battery terminal) measure twice, voltage measuring value larger side is to car
When difference between the voltage of level platform is less than predetermined value, measurement voltage stabilization is judged.
In one embodiment, first switch includes：Optical relay, mechanical relay, triode or metal oxidation
Thing semiconductor field effect transistor, etc..
In one embodiment, second switch includes：Optical relay, mechanical relay, triode or metal oxidation
Thing semiconductor field effect transistor, etc..
The exemplary representative instance for describing first switch and second switch of the above, those skilled in the art will be appreciated that
Arrive, this description is only exemplary, is not intended to limit the present invention the protection domain of embodiment.
It can be seen that, in embodiments of the present invention, by introducing first switch and second switch, when accurately can calculate standing
Between, so as to effectively cover common parasitic capacitance, and high-pressure system insulating resistance value is calculated based on total time of repose, realized first
Secondary initialization parasitic capacitance is adaptive, without manual intervention.
The demonstrative circuit of batteries of electric automobile group insulaion resistance detecting system of the present invention is described below.
Fig. 3 is the exemplary circuit diagram according to batteries of electric automobile group insulaion resistance detecting system of the present invention.
In figure 3, PAD01 is curtage signal acquisition point of the positive terminal to level platform；PAD02 is negative terminal to level
The curtage signal acquisition point of platform；P_CON is positive terminal optical relay control point；N_CON controls for negative terminal optical relay
Point；Resistance R1, resistance R4 and resistance R6 constitute bleeder circuit of the positive terminal to level platform；Resistance R7, resistance R9 and resistance R12
Constitute bleeder circuit of the negative terminal to level platform；Resistance R5 and electric capacity C1 constitutes RC of the positive terminal to level platform voltage signal
Wave filter；Resistance R8 and electric capacity C2 constitutes RC wave filter of the negative terminal to level platform voltage signal；Resistance R3 is positive terminal
To the series resistance of level platform (known to resistance)；Resistance R10 is series resistance of the negative terminal to level platform (known to resistance)；Q1
It is series connection optical relay of the positive terminal to level platform, Q2 is series connection optical relay of the negative terminal to level platform；Resistance R2 is
The corresponding light emitting diode current-limiting resistances of Q1, resistance R11 is the corresponding light emitting diode current-limiting resistances of Q2.
Step (1), in the state of optical relay Q1 and Q2 disconnect, collection PACK+ and PACK- is to vehicle electrical for the first time
The voltage of platform, compares two magnitudes of voltage collected.
Step (2), the optical relay of the larger voltage side of closure, stand after predetermined time t, second of collection PACK+
With PACK- to the voltage of the vehicle electrical platform (battery terminal pair for the larger voltage side that can also be determined in an acquisition step (1)
The voltage of vehicle electrical platform, the battery terminal without the low voltage side of determination in acquisition step (1) is to vehicle electrical platform
Voltage).Then, continue after time of repose t, third time collection PACK+ and PACK- (can also be only to the voltage of vehicle electrical platform
The battery terminal of the larger voltage side determined in acquisition step (1) is to the voltage of vehicle electrical platform, without in acquisition step (1)
Voltage of the battery terminal of the low voltage side of determination to vehicle electrical platform).By that analogy, until performing n, (n is more than or equal to
1) it is secondary to stand collection (the i.e. above-mentioned voltage acquisition with time of repose).In this step, stand after collection, all judge every time
Whether the battery terminal of larger voltage side is stablized to vehicle electrical platform voltage, such as stable, and add up lasting time of repose accordingly,
Obtain total time of repose.The judgment basis of voltage stabilization is：The adjacent terminal measured twice changes to vehicle electrical platform voltage
2V is not to be exceeded (for example, the battery-end of the battery terminal voltage-to-ground of previous larger voltage side and this larger voltage side
Sub- voltage-to-ground change is no more than 2V, it is believed that voltage has been stablized).Such as stabilization, should add up n time of repose, always be stood
Time.Wherein, during time of repose accumulation, larger voltage side optical relay is in closure state all the time.
Illustrate：
It is assumed that in two magnitudes of voltage collected in step (1), PACK+ is higher value to the voltage of vehicle electrical platform.
So, step 2 includes：The optical relay (i.e. optical relay Q1) of larger voltage side is closed, is stood after predetermined time t, the
Secondary acquisition PACK+ to the voltage of vehicle electrical platform, and judge the PACK+ that collects for the second time to the voltage of vehicle electrical platform with
Whether the PACK+ collected for the first time exceedes predetermined value (such as, 2 volts) to the change between the voltage of vehicle electrical platform,
If it does, then assert spread of voltage, continue after time of repose t (now optical relay Q1 is remained closed), third time is gathered
PACK+ judges PACK+ that third time collects to the voltage of vehicle electrical platform with adopting for the second time the voltage of vehicle electrical platform
Whether the PACK+ collected exceedes predetermined value (such as, 2 volts) to the change between the voltage of vehicle electrical platform.By that analogy,
If it does, then continuing to assert spread of voltage, and continue to gather PACK+ again to vehicle electrical platform after standing predetermined time t
Voltage.It is assumed that the PACK+ that collects of third time to the voltage of vehicle electrical platform and the PACK+ collected for the second time to vehicle electrical
Change between the voltage of platform is no more than predetermined value, then assert that voltage has been stablized, then total time of repose is 2t.
Step (3), battery pack insulaion resistance calculated based on total time of repose.
Herein, according to national standard, using total time of repose, PACK+ and PACK- are re-started vehicle electrical platform voltage is adopted
Collection, collection value is calculated available for insulaion resistance.Preferably, total time of repose can be revised, should be on every 60 times after electricity
Amendment is once (amendment parasitic capacitance capacitance situation of change).
Insulaion resistance calculates process and may be referred to GB/T 18384.1-2015, according to following (a), (b), (c) three steps
Calculated.
Voltage between step (a), measurement two terminals of battery pack and vehicle electrical platform.Higher one is defined as U1,
Relatively low one is defined as U1 ', and corresponding two insulaion resistances are defined as Ri1And Ri2=Ri.
Measurement resistance R0 is in parallel with Ri1 known to step (b), addition one, then stands, time of repose is second step
The total time of repose determined, measures U2 and U2 ', notes to keep stable voltage during test.
Step (c), calculating insulaion resistance Ri, method is as follows：By R0With three voltages U1, U1 ' and U2 and substitution following formula：
Such as, it is assumed that determine that the voltage between positive terminal and vehicle electrical platform is higher in the step (a), then close Q1 with
Resistance R3 is introduced into circuit, and disconnects Q2 resistance R10 not to be introduced into circuit.Then stand, time of repose is second step
The total time of repose determined, measurement positive terminal is to the voltage of the voltage U2 and negative terminal of vehicle electrical platform to vehicle electrical platform
U2′.R is calculated based on above-mentioned formula againi, wherein R0Value be R3.
For another example, it is assumed that determine that the voltage between negative terminal and vehicle electrical platform is higher in step (a), then close Q2
So that resistance R10 is introduced into circuit, and disconnect Q1 resistance R3 not to be introduced into circuit.Then stand, time of repose is second step
Suddenly the total time of repose determined, measurement negative terminal is to the electricity of the voltage U2 and positive terminal of vehicle electrical platform to vehicle electrical platform
Press U2 '.R is calculated based on above-mentioned formula againi, wherein R0Value be R10.
Embodiment of the present invention also proposed a kind of batteries of electric automobile group insulaion resistance detection method, and this method is applied to
Batteries of electric automobile group insulaion resistance detecting system shown in Fig. 2.
Fig. 4 is the flow chart according to batteries of electric automobile group insulaion resistance detection method of the present invention.As shown in figure 4, the party
Method includes：
Step 401：First switch and second switch are disconnected, electricity of the positive battery terminal to vehicle electrical platform is measured respectively
Pressure and negative battery terminal determine voltage measuring value larger side to the voltage of vehicle electrical platform.
Step 402：The switch of sealing voltage measured value larger side, voltage measurement is repeatedly measured based on predetermined time of repose
It is worth voltage of the terminal to vehicle electrical platform of larger side, wherein calculating total time of repose when judging measurement voltage stabilization.
Step 403：Based on total time of repose, batteries of electric automobile group insulaion resistance is calculated.
In one embodiment, predetermined value is less than 5 volts.Preferably, predetermined value is 2 volts.
In one embodiment, based on total time of repose, calculating batteries of electric automobile group insulaion resistance includes：
First switch and second switch are disconnected, voltage and battery of the positive battery terminal to vehicle electrical platform are measured respectively
Voltage of the negative terminal to vehicle electrical platform is organized, and determines voltage measuring value larger side；Sealing voltage measured value larger side is opened
Close, the terminal for measuring voltage measuring value larger side based on total time of repose is smaller to the voltage and voltage measuring value of vehicle electrical platform
Voltage of the terminal of side to vehicle electrical platform；Switch based on sealing voltage measured value larger side and be connected to known measurement electricity
Resistance, the terminal of voltage measuring value larger side are to the voltage of vehicle electrical platform and the terminal of voltage measuring value smaller side to vehicle level
The voltage of platform, calculates batteries of electric automobile group insulaion resistance.
The battery pack insulaion resistance detection method and system that embodiment of the present invention can be proposed are applied to all kinds
Electric automobile in, including be not limited to：Pure electric automobile, hybrid vehicle or fuel cell car, etc..
In summary, in embodiments of the present invention, detecting system includes：First known measurement resistance, with battery pack just
The insulaion resistance of extreme son is in parallel；Second known measurement resistance, the insulaion resistance with negative battery terminal is in parallel；First opens
Close, with the first known measurement resistant series；Second switch, with the second known measurement resistant series.The present invention is directed to parasitic capacitance
Influence to Insulation monitoring loop, propose a kind of adaptive Insulation monitoring scheme of high-pressure system parasitic capacitance, it is to avoid parasitism
The adverse effect that electric capacity is detected to insulaion resistance, so as to accurate measurement insulating resistance value.
Those listed above is a series of to be described in detail only for feasibility embodiment of the invention specifically
It is bright, and and be not used to limit the scope of the invention, all equivalent embodiments made without departing from skill spirit of the present invention or
Change, combination, segmentation or the repetition of such as feature, should be included in the scope of the protection.
Claims (10)
1. a kind of batteries of electric automobile group insulaion resistance detecting system, it is characterised in that including：
First known measurement resistance, the insulaion resistance with positive battery terminal is in parallel；
Second known measurement resistance, the insulaion resistance with negative battery terminal is in parallel；
First switch, with the first known measurement resistant series；
Second switch, with the second known measurement resistant series.
2. batteries of electric automobile group insulaion resistance detecting system according to claim 1, it is characterised in that described first opens
Pass includes：Optical relay, mechanical relay, triode or mos field effect transistor.
3. batteries of electric automobile group insulaion resistance detecting system according to claim 1, it is characterised in that described second opens
Pass includes：Optical relay, mechanical relay, triode or mos field effect transistor.
4. a kind of batteries of electric automobile group insulaion resistance detection method, it is characterised in that this method is applied to as claimed in claim 1
Batteries of electric automobile group insulaion resistance detecting system, this method includes：
First switch and second switch are disconnected, positive battery terminal is measured respectively the voltage and battery pack of vehicle electrical platform is born
The extreme sub voltage to vehicle electrical platform, and determine voltage measuring value larger side；
The switch of sealing voltage measured value larger side, the end of voltage measuring value larger side is repeatedly measured based on predetermined time of repose
The sub voltage to vehicle electrical platform, wherein calculating total time of repose when judging measurement voltage stabilization；
Based on total time of repose, batteries of electric automobile group insulaion resistance is calculated.
5. batteries of electric automobile group insulaion resistance detection method according to claim 4, it is characterised in that the judgement is surveyed
Amount voltage stabilization includes：
When the difference between voltage of the adjacent terminal measure twice, voltage measuring value larger side to vehicle electrical platform is less than in advance
During definite value, measurement voltage stabilization is judged.
6. batteries of electric automobile group insulaion resistance detection method according to claim 5, it is characterised in that the predetermined value
Less than 5 volts.
7. batteries of electric automobile group insulaion resistance detection method according to claim 6, it is characterised in that the predetermined value
For 2 volts.
8. batteries of electric automobile group insulaion resistance detection method according to claim 4, it is characterised in that described to be based on being somebody's turn to do
Total time of repose, calculating batteries of electric automobile group insulaion resistance includes：
First switch and second switch are disconnected, positive battery terminal is measured respectively the voltage and battery pack of vehicle electrical platform is born
The extreme sub voltage to vehicle electrical platform, and determine voltage measuring value larger side；
The switch of sealing voltage measured value larger side, the terminal of voltage measuring value larger side is measured to vehicle based on total time of repose
The voltage of the voltage of level platform and the terminal of voltage measuring value smaller side to vehicle electrical platform；
Switch based on sealing voltage measured value larger side and be connected to known measurement resistance, the end of voltage measuring value larger side
Son, to the voltage of vehicle electrical platform, calculates electric automobile electricity to the voltage of vehicle electrical platform and the terminal of voltage measuring value smaller side
Pond group insulaion resistance.
9. a kind of electric automobile, it is characterised in that include batteries of electric automobile group insulaion resistance as claimed in claim 1 detection
System.
10. electric automobile as claimed in claim 9, it is characterised in that the electric automobile includes pure electric automobile, mixing and moved
Power automobile or fuel cell car.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109116281A (en) * | 2018-09-25 | 2019-01-01 | 北京长城华冠汽车科技股份有限公司 | A kind of diagnostic system and method for batteries of electric automobile group insulating resistor detecting circuit |
| CN109444694A (en) * | 2018-11-29 | 2019-03-08 | 华人运通控股有限公司 | Electric automobile insulation detection method, device and detection device |
| CN109900487A (en) * | 2017-12-07 | 2019-06-18 | 宝沃汽车（中国）有限公司 | Insulation detecting method, system and the electric car of electric car |
| CN110501645A (en) * | 2019-08-02 | 2019-11-26 | 华人运通(江苏)技术有限公司 | Insulation failure detection method, apparatus, electric car and computer storage medium |
| CN111781424A (en) * | 2020-07-14 | 2020-10-16 | 中国第一汽车股份有限公司 | Method and device for measuring insulation resistance of electric vehicle, vehicle and storage medium |
| CN113484701B (en) * | 2021-06-03 | 2024-01-26 | 度普(苏州)新能源科技有限公司 | Insulation detection method, insulation detection device, computer readable storage medium and processor |
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| CN109900487A (en) * | 2017-12-07 | 2019-06-18 | 宝沃汽车（中国）有限公司 | Insulation detecting method, system and the electric car of electric car |
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| CN109444694B (en) * | 2018-11-29 | 2021-09-21 | 华人运通(江苏)技术有限公司 | Electric automobile insulation detection method, device and detection equipment |
| CN110501645A (en) * | 2019-08-02 | 2019-11-26 | 华人运通(江苏)技术有限公司 | Insulation failure detection method, apparatus, electric car and computer storage medium |
| CN110501645B (en) * | 2019-08-02 | 2021-11-30 | 华人运通(江苏)技术有限公司 | Insulation fault detection method and device, electric vehicle and computer storage medium |
| CN111781424A (en) * | 2020-07-14 | 2020-10-16 | 中国第一汽车股份有限公司 | Method and device for measuring insulation resistance of electric vehicle, vehicle and storage medium |
| CN111781424B (en) * | 2020-07-14 | 2023-03-24 | 中国第一汽车股份有限公司 | Method and device for measuring insulation resistance of electric vehicle, vehicle and storage medium |
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