CN108646187A - Battery system insulating resistor detecting circuit and method - Google Patents
Battery system insulating resistor detecting circuit and method Download PDFInfo
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- CN108646187A CN108646187A CN201810369352.2A CN201810369352A CN108646187A CN 108646187 A CN108646187 A CN 108646187A CN 201810369352 A CN201810369352 A CN 201810369352A CN 108646187 A CN108646187 A CN 108646187A
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Abstract
The present invention relates to a kind of battery system insulating resistor detecting circuit and methods,The circuit includes battery module,Detection circuit module and insulation resistance module,Insulation resistance module includes the first insulation resistance Rp and the second insulation resistance Rn,First one end insulation resistance Rp is connected to the positive bus-bar of battery module,The other end of first insulation resistance Rp is connected to ground wire PE and is also connected to the negative busbar of battery module by stating the second insulation resistance Rn,Detection circuit module includes the first connecting pin V1 and second connection end V2,First connecting pin V1 is connected on positive bus-bar,Second connection end V2 is connected in negative busbar,The first insulation resistance Rp is the equivalent resistance for the leak resistance being connected between the positive bus-bar of battery module and ground wire PE,The second insulation resistance Rn is the equivalent resistance for the leak resistance being connected between the negative busbar of battery module and ground wire PE,To effectively improve the precision for the resistance value for detecting the first insulation resistance Rp and the second insulation resistance Rn.
Description
Technical field
The present invention relates to power system technologies field, more particularly to a kind of battery system insulating resistor detecting circuit and side
Method.
Background technology
In some large-scale battery systems, such as energy-accumulating power station and container-type energy-storage system, due to battery side
Voltage belongs to high pressure, normally close to 1KV, to ensure the personal safety of operating personnel, system equipment safety and ambient enviroment
Safety, it is necessary to detect in battery system battery side DC bus to the insulation resistance of the earth.
Existing insulating resistor detecting circuit can increase the leakage current of battery system in access, and in order to reduce detection
The influence that circuit itself leaks electricity to entire battery system is often judged to be detected using extremely weak detection signal, was dropped at that time
The intensity of low detection signal can reduce the accuracy of detection of detection circuit, and the occasion severe in electromagnetic environment, and detection signal is easily
It is interfered, testing result precision is not high.
Invention content
The technical problem to be solved in the present invention be for the above-mentioned prior art in shortcoming, a kind of battery system is provided
System insulating resistor detecting circuit and method.
The present invention solves the technological means that technical problem uses and is to provide a kind of battery system insulating resistor detecting circuit, wraps
Battery module, detection circuit module and insulation resistance module are included, the insulation resistance module includes the first insulation resistance Rp
With the second insulation resistance Rn, described one end first insulation resistance Rp is connected to the positive bus-bar of the battery module, and described first
The other end of insulation resistance Rp is connected to the negative busbar of the battery module by the second insulation resistance Rn, and described first
The other end of insulation resistance Rp is additionally coupled to ground wire PE, and the detection circuit module includes the first connecting pin V1 and second connection end
V2, the first connecting pin V1 are connected on the circuit between the first insulation resistance Rp and the positive bus-bar, and described second
Connecting pin V2 is connected on the circuit between the second insulation resistance Rn and the negative busbar, and the first insulation resistance Rp is
It is connected on the equivalent resistance of the leak resistance between the positive bus-bar of battery module and ground wire PE, the second insulation resistance Rn is to connect
The equivalent resistance of leak resistance between the negative busbar and ground wire PE of battery module.
Further, the detection circuit module includes processor unit, the first signal processing unit, second signal processing
Unit and adjustable boosting unit, the first connecting pin V1 are connected to the first end of first switch K1, the first switch K1's
Second end is connected to the first end of second switch K2, and the second end of the second switch K2 is connected to the adjustable boosting unit
Output end hv, the output end hv are further connected to the second end of third switch K3, the second end and the 5th of the 4th switch K4
The first end of the second end of switch K5, the 5th switch K5 is connected to the second end of the 6th switch K6, the 6th switch K6
First end be connected to the second connection end V2, the first end of the third switch K3 and the first end of the 4th switch K4 connect
It is connected to the ground wire PE, the second end of the first switch K1 also passes sequentially through first resistor R1, second resistance R2,3rd resistor
R3 and the 4th resistance R4 is connected to the first end of the 5th switch K5, and the input terminal of first signal processing unit is connected to
On circuit between the first resistor R1 and second resistance R2, the input terminal of the second signal processing unit is connected to described
On circuit between 3rd resistor R3 and the 4th resistance R4, the output of the processor unit and first signal processing unit
End is connected with the output end of second signal processing unit, and the input terminal of the adjustable boosting unit is connected to the processor unit
Output end, the first end of the third switch K3 and the first end of the 4th switch K4 are connected to second resistance R2 and third electricity
It hinders on the circuit between R3, and the first end of the third switch K3 and the first end of the 4th switch K4 are additionally coupled to ground wire PE,
The letter of the first switch K1, second switch K2, third switch K3, the 4th switch K4, the 5th switch K5 and the 6th switch K6
Number line end is connected to the processor unit.
Further, the detection circuit module further includes the 5th resistance R5 and the 6th resistance R6, the 5th resistance R5
One end is connected to the first connecting pin V1, and the other end of the 5th resistance R5 is connected to described by the 6th resistance R6
Second connection end V2, the other end of the 5th resistance R5 are additionally coupled to the processor unit.
Further, the battery module includes battery pack, and the anode of the battery pack passes through the 7th switch K7 connections
To the positive bus-bar, the cathode of the battery pack is connected to the negative busbar by the 8th switch K8.
Further, the battery module further includes load, and the positive bus-bar is connected to described negative by the load
Busbar.
On the other hand, the present invention also provides a kind of battery system insulation resistance detection methods, are applied to such as above-mentioned battery
In system insulating resistance detection circuit, including：
Obtain the output voltage of battery module；
Obtain the first overcurrent of the first insulation resistance Rp and the second insulation resistance Rn；
The electricity of the first insulation resistance Rp and the second insulation resistance Rn are calculated according to the output voltage and the first overcurrent
Resistance value.
Further, described that first insulation resistance Rp and second is calculated absolutely according to the output voltage and the first overcurrent
The step of resistance value of edge resistance Rn, specifically includes：
The interior voltage signal of several concatenated interior resistance and interior current signal in detection circuit module are obtained, it is described several interior
The concatermer of resistance is in parallel with the first insulation resistance Rp and the second insulation resistance Rn；
The resistance value of several interior resistance is calculated according to the interior voltage signal and interior current signal；
It is exhausted that the first insulation resistance Rp and second is calculated according to the resistance value of preset algorithm and several interior resistance
The resistance value of edge resistance Rn.
Further, include before the step of output voltage for obtaining battery module：
Disconnection detection circuit module include the first connecting pin V1 and second connection end V2 and battery module positive bus-bar and
Connection between negative busbar；
Detect whether the detection circuit inside modules voltage is more than preset value, if so, sending out alarm signal to outside
Equipment.
Using above-mentioned technical proposal, the present invention at least has the advantages that：The embodiment of the present invention passes through detection circuit
First connecting pin V1 of module is connected to the first insulation resistance Rp, and the second connection end V2 of detection circuit module is connected to second
Insulation resistance Rn, wherein, the first insulation resistance Rp is the electric leakage being connected between the positive bus-bar of battery module and ground wire PE
The equivalent resistance of resistance, the second insulation resistance Rn are the electric leakage electricity being connected between the negative busbar of battery module and ground wire PE
The equivalent resistance of resistance provides voltage by battery module for the first insulation resistance Rp and the second insulation resistance Rn, described
Detection circuit module can detect the electric current by the first insulation resistance Rp and the second insulation resistance Rn, be calculated to analyze
Go out the resistance value of the first insulation resistance Rp and the second insulation resistance Rn；On the other hand, detection circuit of the present invention include can
Volt circuit is increased, high pressure can be introduced to shell in the positive and negative busbar of battery module and carry out Insulation monitoring, even if battery pack mould
The switch K7 to K8 of block is not closed, and still can normally detect drain conditions；And detection circuit itself can generate high pressure,
When detecting, it is not influenced by battery module voltage itself, improves versatility and the flexibility of detection, and in practical measurement
When, introduce detection circuit in a short period of time, then can appropriate amplification detection signal, improve accuracy of detection and anti-interference energy
Power；By reducing the resistance value of resistance R1 to R4, and the multi-breal switch break-make by controlling switch K1 to K6 combines, and improves inspection
The ability of slowdown monitoring circuit fault self-checking improves accuracy of detection.
Description of the drawings
Fig. 1 is the block diagram of battery system insulating resistor detecting circuit one embodiment of the present invention.
Fig. 2 is the electrical block diagram of battery system insulating resistor detecting circuit one embodiment of the present invention.
Fig. 3 is the flow diagram of battery system insulation resistance detection method one embodiment of the present invention.
Fig. 4 is the idiographic flow schematic diagram of battery system insulation resistance detection method one embodiment step S3 of the present invention.
Fig. 5 is the idiographic flow schematic diagram of battery system insulation resistance detection method one embodiment step S1 of the present invention.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
It please refers to Fig.1 to Fig. 2, the present invention provides a kind of technical solution：A kind of battery system insulating resistor detecting circuit, packet
Battery module 1, detection circuit module 2 and insulation resistance module 3 are included, the insulation resistance module 3 includes the first insulated electro
Rp and the second insulation resistance Rn is hindered, described one end first insulation resistance Rp is connected to the positive bus-bar of the battery module 1, described
The other end of first insulation resistance Rp is connected to the negative busbar of the battery module 1, institute by the second insulation resistance Rn
The other end for stating the first insulation resistance Rp is additionally coupled to ground wire PE, and the detection circuit module 2 includes the first connecting pin V1 and the
Two connecting pin V2, the first connecting pin V1 are connected on the circuit between the first insulation resistance Rp and the positive bus-bar,
The second connection end V2 is connected on the circuit between the second insulation resistance Rn and the negative busbar, first insulation
Resistance Rp is the equivalent resistance for the leak resistance being connected between the positive bus-bar of battery module and ground wire PE, second insulated electro
Resistance Rn is the equivalent resistance for the leak resistance being connected between the negative busbar of battery module and ground wire PE.
When implementing, the output plus terminal of the battery module 1 is connected to the positive bus-bar, the battery module 1
Output negative terminal is connected to the negative busbar, wherein it is exhausted that the positive bus-bar also passes sequentially through the first insulation resistance Rp and second
Edge resistance Rn is connected to the negative busbar, and the first connecting pin V1 of the detection circuit module 2 and second connection end V2 difference
It is connected in the positive bus-bar and negative busbar, the detection circuit module 2 is exported by detecting the battery module 1 to described
Voltage value on first insulation resistance Rp and the second insulation resistance Rn, and flow through the shown insulation of first insulation resistance Rp and second
The current value of resistance Rn, to which analysis calculates the resistance value of the first insulation resistance Rp and the second insulation resistance Rn.
In one alternate embodiment, the detection circuit module includes processor unit U1, the first signal processing unit
U2, second signal processing unit U3 and adjustable boosting unit U4, the first connecting pin V1 are connected to the first of first switch K1
The second end at end, the first switch K1 is connected to the first end of second switch K2, the second end connection of the second switch K2
To the output end hv of the adjustable boosting unit U4, the output end hv be further connected to third switch K3 second end, the
The second end of four switch K4 and the second end of the 5th switch K5, the first end of the 5th switch K5 are connected to the 6th switch K6
Second end, the first end of the 6th switch K6 is connected to the second connection end V2, the first end of the third switch K3
It is connected to the ground wire PE with the first end of the 4th switch K4, the second end of the first switch K1 also passes sequentially through the first electricity
Resistance R1, second resistance R2,3rd resistor R3 and the 4th resistance R4 are connected to the first end of the 5th switch K5, first letter
The input terminal of number processing unit U2 is connected on the circuit between the first resistor R1 and second resistance R2, the second signal
The input terminal of processing unit U3 is connected on the circuit between the 3rd resistor R3 and the 4th resistance R4, the processor unit
U1 is connect with the output end of the output end of the first signal processing unit U2 and second signal processing unit U3, described to increase
The input terminal of pressure unit U4 is connected to the output end of the processor unit U1, and the first end and the 4th of the third switch K3 is opened
The first end for closing K4 is connected on the circuit between second resistance R2 and 3rd resistor R3, and the first of the third switch K3
The first end of end and the 4th switch K4 are additionally coupled to ground wire PE, the first switch K1, second switch K2, third switch K3, the
Four switch K4, the 5th switch K5 and the 6th switch K6 include first end, second end and signal line end, as shown in Fig. 2, often
One switch includes first end 1, second end 2 and signal line end 3, signal line end, the second switch K2 of the first switch K1
Signal line end, the signal line end of third switch K3, the signal line end of the 4th switch K4, the signal line end of the 5th switch K5 and
The signal line end of 6th switch K6 is connected to the processor unit U1, and the processor unit U1 is connected respectively by signal wire
It is connected to first switch K1, second switch K2, third switch K3, the 4th switch K4, the 5th switch K5 and the 6th switch K6, to
Control the opening and closing of each switch.
The present embodiment passes through the logical of this 6 switches of control switch K1 to K6 by reducing the resistance value of resistance R1 to R4
It is disconnected, reduce the influence that detection circuit leak electricity to entire battery system, can appropriate amplification detection signal, improve accuracy of detection with
Anti-interference ability.
When implementing, the detection circuit module 2 further includes the 5th resistance R5 and the 6th resistance R6, the 5th resistance R5
One end is connected to the first connecting pin V1, and the other end of the 5th resistance R5 is connected to described by the 6th resistance R6
Second connection end V2, the other end of the 5th resistance R5 are additionally coupled to the processor unit U1.
The battery module 1 includes that the anode of battery pack U5, the battery pack U5 are connected to institute by the 7th switch K7
Positive bus-bar is stated, the cathode of the battery pack U5 is connected to the negative busbar by the 8th switch K8.The battery module 1 also wraps
Load U6 is included, the positive bus-bar is connected to the negative busbar by the load U6.
Specifically, when being detected, it first disconnects the first switch K1, second switch K2, third switch K3, the 4th open
K4, the 5th switch K5 and the 6th switch K6 are closed, at this point, detection is respectively by the first signal processing unit U2 and second signal
Reason unit U3 is sent to the first signal S1 and second signal S2 of the processor unit U1, if the first signal S1 and second
In signal S2 any one be more than the first preset value when, the detection circuit breaks down, stop subsequent action simultaneously pass through place
Reason device unit U1 is sent a warning message to user terminal, and user is reminded to carry out troubleshooting.
When the first signal S1 and second signal S2 are respectively less than first preset value, the 5th resistance R5 is detected
And the 6th circuit between resistance R6 is sent to the third signal S3 of processor unit U1, if the third signal S3 is more than second
When preset value, then the 7th switch K7 and the 8th switch K8 is in closed state, and battery pack U5 has output, the processor list
First U1 can calculate the cell voltage Vbat0, the processor unit U1 of the battery pack U5 according to the third signal S3
The output voltage values of the adjustable boosting unit U4 are controlled according to the third signal S3.If the third signal S3 is less than institute
When stating the second preset value, then the 7th switch K7 and the 8th switch K8 are disconnected, it is believed that the battery pack U5 is not exported at this time, then is controlled
The device unit U1 controls adjustable boosting unit U4 processed exports predeterminated voltage.
If previous step is it is determined that the 7th switch K7 and the 8th switch K8 is closed state, at this point, closure first is opened
K1 and the 6th switch K6 is closed, and detects the first signal S1 and second signal S2, calculates first voltage Vp and second voltage
Vn, the first voltage Vp are the voltage of the second end of the first switch K1, and the second voltage Vn is the 6th switch
The voltage of the second end of K6, then known to the battery pack U5 voltage Vbat1=Vp+Vn, by compare the Vbat0 and
The value of Vbat1, if difference exceeds third preset value between two values of the Vbat0 and Vbat1, then it is assumed that detection circuit occurs
Failure stops subsequent action and sends a warning message.
If previous step is it is determined that the 7th switch K7 and the 8th switch K8 is off-state, at this point, disconnection first is opened
K1 and the 6th switch K6 is closed, and is closed second switch K2 and the 5th switch K5, detects the first signal S1 and second signal S2,
Calculate Vp0 and Vn0, the Vp0 is the voltage of the second end of the first switch K1 at this time, and the Vn0 is described at this time the
The voltage of the second end of six switch K6, if the predeterminated voltage of the value of the Vp0+Vn0 and the adjustable boosting unit U4 output it
Between difference be more than four preset values when, then it is assumed that detection circuit send failure, stop subsequent action simultaneously send a warning message, if
When difference between the Vp0 and Vn0 is more than five preset values, then it is assumed that detection circuit sends failure, stops subsequent action simultaneously
It sends a warning message, if thinking after above-mentioned judgement, detection circuit does not send failure, it is concluded that the adjustable boosting unit
The voltage value Vhv=Vp0+Vn0 of the output voltage of U4.
If previously described 7th switch K7 and the 8th switch K8 is off-state, the third switch K3, the 4th are disconnected
Switch K4 and the 6th switch K6, and it is closed the first switch K1, second switch K2 and the 5th switch K5, described is detected at this time
One signal S1 and second signal S2, you can calculate Vp1 and Vn1, obtain following formula：
Wherein, the Vp1 is the voltage of the second end of the first switch K1 at this time, and the Vn1 is the at this time the described 6th
The voltage of the second end of switch K6.
Then first switch K1, third switch K3 and the 4th switch K4 are disconnected again, and are closed the second switch K2, the 5th
Switch K5 and the 6th switch K6 detects the first signal S1 and second signal S2, you can calculate Vp2 and Vn2, obtain at this time
Following formula：
The Rp and Rn 1. and 2. can be calculated by above formula.
When it is determined that the 7th switch K7 and the 8th switch K8 is closed state, then by the first voltage Vp and the
Two voltage Vn substitute into following formula：
It is then turned off third switch K3, the 4th switch K4 and the 6th switch K6, recloses first switch K1, second switch K2
With the 5th switch K5, the first signal S1 and second signal S2 is detected at this time, and to calculate Vp3, the Vp3 is described at this time the
The voltage of the second end of one switch K1, obtains following formula：
First switch K1, third switch K3 and the 4th switch K4 are disconnected, and is closed the second switch K2, the 5th switch K5
With the 6th switch K6, the first signal S1 and second signal S2 is detected at this time, calculates Vn3, and Vn3 is the 6th switch K6 at this time
Second end voltage, obtain following formula：
The value of the Rp and Rn 3., 4. and 5. can be calculated according to above formula.
R in wherein above-mentioned each formula is the resistance value of second resistance R2 and 3rd resistor R3, the resistance of second resistance R2
Value is equal to the resistance value of the 3rd resistor R3, and the R0 in above-mentioned each formula is the resistance of first resistor R1 and the 4th resistance R4
Value, the resistance value of first resistor R1 are equal to the resistance value of the 4th resistance R4.The first voltage Vp's and second voltage Vn
Reference ground is the ground wire PE, and the reference ground of the battery pack U5 is the negative busbar, the reference ground of the controller unit U1
It is connect with the negative busbar.
The present embodiment is equipped with adjustable boosting unit U4, can be introduced to shell in the positive bus-bar and negative busbar of battery pack U5 high
It is pressed into line Insulation monitoring, it, still can be just even if the main switch (the 7th switch K7 and the 8th switch K8) of battery system is not closed
The often drain conditions of detection battery system, and can be sent a warning message, Er Qiejian when the system of discovery appearance exception sends failure
Slowdown monitoring circuit itself can generate high pressure, when detecting, do not influenced by battery pack U5 voltage itself, improve the versatility of detection
And flexibility introduces detection circuit in a short period of time when measuring, then can appropriate amplification detection signal, improve inspection
Precision and jamproof ability are surveyed, is combined in addition, being equipped with multi-breal switch in detection circuit, improves detection circuit fault self-checking
Ability, also reduce the leakage current that detection circuit itself introduces, improve accuracy of detection.
On the other hand, as shown in figure 3, the present invention also provides a kind of battery system insulation resistance detection method, it is applied to such as
In above-mentioned battery system insulating resistor detecting circuit, including：
Step S1 obtains the output voltage of battery module；
Step S2 obtains the first overcurrent of the first insulation resistance Rp and the second insulation resistance Rn；
Step S3 calculates the first insulation resistance Rp and the second insulation resistance according to the output voltage and the first overcurrent
The resistance value of Rn.
When implementing, by obtaining the output voltage of battery module and passing through the first insulation resistance Rp and second
The first overcurrent of insulation resistance Rn, by repeatedly adjusting each resistance and the insulation resistance Rp and second in detection circuit module
Parallel relationship between insulation resistance Rn carries to calculate the resistance value of the first insulation resistance Rp and the second insulation resistance Rn
High measurement accuracy.
In one alternate embodiment, as shown in figure 4, described calculate according to the output voltage and the first overcurrent
The step of resistance value of one insulation resistance Rp and the second insulation resistance Rn, specifically includes：
Step S31 obtains the interior voltage signal of several concatenated interior resistance and interior current signal, institute in detection circuit module
The concatermer for stating several interior resistance is in parallel with the first insulation resistance Rp and the second insulation resistance Rn；
Step S32 calculates the resistance value of several interior resistance according to the interior voltage signal and interior current signal；
Step S33 calculates the first insulation resistance Rp according to the resistance value of preset algorithm and several interior resistance
With the resistance value of the second insulation resistance Rn.
When implementing, detection circuit mould several interior resistance in the block and the insulation of the first insulation resistance Rp and second
A variety of in parallel and/or series relationships can be formed between resistance Rn, change the interior resistance and the first edge resistance Rp and
Various connection relations between second insulation resistance Rn, and obtain the interior voltage signal of the interior resistance and interior circuit signal
The resistance value of each interior resistance is calculated, and can be insulated according to multiple interior resistance and the first edge resistance Rp and second
Connection relation between resistance Rn, you can the first edge resistance Rp and are calculated according to the resistance value of multiple interior resistance
Resistance value between two insulation resistance Rn.
In one alternate embodiment, as shown in figure 5, it is described obtain battery module output voltage the step of before wrap
It includes：
Step S11's, the first connecting pin V1 and second connection end V2 and battery module in disconnection detection circuit module
Connection between positive bus-bar and negative busbar；
Step S12, detects whether the detection circuit inside modules voltage is more than preset value, if so, sending out alarm signal
Number to external equipment.
When implementing, the detection circuit module includes the first connecting pin V1 and second connection end V2, first connection
End V1 and second connection end V2 is connect with the positive bus-bar and negative busbar respectively, is connected when disconnecting the first connecting pin V1 and second
When connecing the connection between end V2 and the positive bus-bar and negative busbar, battery module cannot provide voltage to the detection circuit mould
Block, at this point, being detected to the builtin voltage of the detection circuit module, if detecting the inside electricity of the detection circuit module
When pressure is more than preset value, then it is assumed that detection circuit breaks down, and sends out alarm signal to external equipment, and the external equipment can be with
It is designed to be terminal, display terminal or mobile terminal, user is facilitated to detect whether detection circuit occurs at any time
Failure is to repair management.
The foregoing is merely the preferred embodiment of the present invention, are not intended to limit the scope of the invention, every utilization
Equivalent structure or equivalent flow shift made by description of the invention and accompanying drawing content is applied directly or indirectly in other correlations
Technical field, be included within the scope of the present invention.
Claims (8)
1. a kind of battery system insulating resistor detecting circuit, it is characterised in that：Including battery module, detection circuit module and
Insulation resistance module, the insulation resistance module include the first insulation resistance Rp and the second insulation resistance Rn, first insulation
The one end resistance Rp is connected to the positive bus-bar of the battery module, and the other end of the first insulation resistance Rp passes through described second
Insulation resistance Rn is connected to the negative busbar of the battery module, and the other end of the first insulation resistance Rp is additionally coupled to ground wire
PE, the detection circuit module include that the first connecting pin V1 and second connection end V2, the first connecting pin V1 are connected to described
On circuit between first insulation resistance Rp and the positive bus-bar, the second connection end V2 is connected to second insulation resistance
On circuit between Rn and the negative busbar, the first insulation resistance Rp is the positive bus-bar and ground wire PE for being connected on battery module
Between leak resistance equivalent resistance, the second insulation resistance Rn be connected on the negative busbar of battery module and ground wire PE it
Between leak resistance equivalent resistance.
2. battery system insulating resistor detecting circuit according to claim 1, it is characterised in that：The detection circuit module
Including processor unit, the first signal processing unit, second signal processing unit and adjustable boosting unit, first connecting pin
V1 is connected to the first end of first switch K1, and the second end of the first switch K1 is connected to the first end of second switch K2, institute
The second end for stating second switch K2 is connected to the output end hv of the adjustable boosting unit, and the output end hv is further connected to
The second end of the second end of third switch K3, the second end and the 5th switch K5 of the 4th switch K4, the of the 5th switch K5
One end is connected to the second end of the 6th switch K6, and the first end of the 6th switch K6 is connected to the second connection end V2, institute
The first end of the first end and the 4th switch K4 of stating third switch K3 is connected to the ground wire PE, and the of the first switch K1
Two ends also pass sequentially through first resistor R1, second resistance R2,3rd resistor R3 and the 4th resistance R4 and are connected to the 5th switch
The input terminal of the first end of K5, first signal processing unit is connected between the first resistor R1 and second resistance R2
On circuit, the input terminal of the second signal processing unit is connected to the circuit between the 3rd resistor R3 and the 4th resistance R4
On, the processor unit connects with the output end of first signal processing unit and the output end of second signal processing unit
It connecing, the input terminal of the adjustable boosting unit is connected to the output end of the processor unit, and the first of the third switch K3
The first end of end and the 4th switch K4 are connected on the circuit between second resistance R2 and 3rd resistor R3, and the third is opened
The first end of the first end and the 4th switch K4 of closing K3 is additionally coupled to ground wire PE, the first switch K1, second switch K2, third
Switch K3, the 4th switch K4, the 5th switch K5 and the 6th switch K6 signal line end be connected to the processor unit.
3. battery system insulating resistor detecting circuit according to claim 2, it is characterised in that：The detection circuit module
Further include the 5th resistance R5 and the 6th resistance R6, the one end the 5th resistance R5 is connected to the first connecting pin V1, and described
The other end of five resistance R5 is connected to the second connection end V2 by the 6th resistance R6, and the 5th resistance R5's is another
End is additionally coupled to the processor unit.
4. battery system insulating resistor detecting circuit according to claim 1, it is characterised in that：The battery module packet
Battery pack is included, the anode of the battery pack is connected to the positive bus-bar by the 7th switch K7, and the cathode of the battery pack passes through
8th switch K8 is connected to the negative busbar.
5. battery system insulating resistor detecting circuit according to claim 1 or 4, it is characterised in that：The battery pack mould
Block further includes load, and the positive bus-bar is connected to the negative busbar by the load.
6. a kind of battery system insulation resistance detection method is applied to the battery system as described in any one of claim 1 to 5
In insulating resistor detecting circuit, which is characterized in that including：
Obtain the output voltage of battery module；
Obtain the first overcurrent of the first insulation resistance Rp and the second insulation resistance Rn；
The resistance value of the first insulation resistance Rp and the second insulation resistance Rn are calculated according to the output voltage and the first overcurrent.
7. battery system insulation resistance detection method according to claim 6, which is characterized in that described according to the output
Voltage and the first overcurrent calculate the step of resistance value of the first insulation resistance Rp and the second insulation resistance Rn and specifically include：
Obtain the interior voltage signal of several concatenated interior resistance and interior current signal, several interior resistance in detection circuit module
Concatermer it is in parallel with the first insulation resistance Rp and the second insulation resistance Rn；
The resistance value of several interior resistance is calculated according to the interior voltage signal and interior current signal；
The first insulation resistance Rp and the second insulated electro are calculated according to the resistance value of preset algorithm and several interior resistance
Hinder the resistance value of Rn.
8. battery system insulation resistance detection method according to claim 6, which is characterized in that the acquisition battery pack mould
Include before the step of output voltage of block：
Disconnection detection circuit module includes the positive bus-bar of the first connecting pin V1 and second connection end V2 and battery module and negative mother
Connection between line；
Detect whether the detection circuit inside modules voltage is more than preset value, if so, sending out alarm signal to external equipment.
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Effective date of registration: 20210520 Address after: 321100 No.16 Hongyun Road, Lanjiang street, Lanxi City, Jinhua City, Zhejiang Province (self declaration) Patentee after: Zhejiang Xindong Energy Technology Co.,Ltd. Address before: 518000, 1st floor, 2nd floor, A-B area, 2nd floor, D area-9th floor, Yihe Road, Shiyan Street, Baoan District, Shenzhen City, Guangdong Province Patentee before: SUNWODA ELECTRONICS Co.,Ltd. |