CN208119093U - Power signal processing circuit and battery management system - Google Patents
Power signal processing circuit and battery management system Download PDFInfo
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- CN208119093U CN208119093U CN201820585332.4U CN201820585332U CN208119093U CN 208119093 U CN208119093 U CN 208119093U CN 201820585332 U CN201820585332 U CN 201820585332U CN 208119093 U CN208119093 U CN 208119093U
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Abstract
A kind of power signal processing circuit, including：Detect and export the Key detecting signal unit of Key signal, detect and export the power signal input unit of current power status signal, it receives the control signal that main control unit issues and controls the power signal output unit of power motor working condition according to the control signal, and according to the Key signal, the current power status signal exports the main control unit of the control signal, the output end of the Key detecting signal unit is connect with the first input end of the main control unit, the output end of the power signal output unit is connect with the second input terminal of the main control unit, first output end of the main control unit is connect with the input terminal of the power signal output unit.A kind of battery management system, including power signal processing circuit as described above are also provided.This embodiment scheme improves stability and safety it is possible to prevente effectively from problem of casting anchor.
Description
Technical field
This application involves electronic technology fields, more particularly to a kind of power signal processing circuit and a kind of battery management
System.
Background technique
In current electronic technology field, by taking electric vehicle as an example, the control to vehicle is usually to be gone by entire car controller
It completes.When temperature drift or the relatively low situation of capacity occurs in power supply unit (such as power battery), pass through CAN (Controller
Area Network, Controller Area Network BUS) bus communication informing controller, realize downrating.In this process,
It is improper if there is downrating, it will result in excess temperature or over-discharge, BMS (BATTERY MANAGEMENT SYSTEM, electricity
Pond management system) system can direct cut-off energy source, cause vehicle to stop power supply, vehicle casts anchor.
Summary of the invention
Based on this, the embodiment of the present application is designed to provide a kind of power signal processing circuit and a kind of battery management
System.
A kind of power signal processing circuit, including：The Key detecting signal unit of Key signal is detected and exported, is detected and defeated
The power signal input unit of current power status signal out receives the control signal of main control unit output and according to control signal
The power signal output unit of power motor working condition is controlled, and is believed according to the Key signal, the current power state
The main control unit of number output control signal, the first of the output end of the Key detecting signal unit and the main control unit
Input terminal connection, the defeated output end such as unit of the power signal are connect with the second input terminal of the main control unit, the master
First output end of control unit is connect with the input terminal of the power signal output unit.
In one embodiment, which further includes：Detect the temperature detection of simultaneously output temperature signal
Unit, the output end of the temperature detecting unit are connect with the third input terminal of the main control unit.At this point, the main control unit
The control signal is exported according to the Key signal, the current power status signal and the temperature signal.
In one embodiment, the temperature detecting unit includes two or more.
In one embodiment, which further includes：Detect and export the electricity of battery voltage signal
Pond group voltage acquisition unit, the output end of the battery voltage acquisition unit and the 4th input terminal of the main control unit connect
It connects.At this point, the main control unit is believed according to the Key signal, the current power status signal and the battery voltage
Number output control signal.
In one embodiment, which further includes：Be connected between B- electrode and P- electrode and with
The charge-discharge modules of the main control unit connection.
In one embodiment, the Key detecting signal unit includes：Division module interconnected and the first optocoupler every
From module, first light-coupled isolation module exports the Key signal.
In one embodiment, the power signal input unit includes：Second linear optical coupling isolation mould interconnected
Block and the first amplifier follow module, and first amplifier follows module to export the current power status signal.
In one embodiment, the power signal output unit includes：Third linear light-coupled isolation mould interconnected
Block and the second amplifier follow module, and the input terminal of the third light-coupled isolation module receives the control letter of the main control unit output
Number.
In one embodiment, the main control unit includes main control module, crystal oscillator module and reseting module, the master control mould
Block is connect with the crystal oscillator module and the reseting module.
A kind of battery management system, including power signal processing circuit as described above.
Based on the scheme of embodiment as described above, power input signal is input to battery by the Key signal based on detection
The power signal processing circuit of management system, and export again after treatment to control the working condition of power motor, so as to
Power motor is output power to the state preferably according to battery, the problem it is possible to prevente effectively from vehicle casts anchor increases vehicle
Mileage travelled extends battery, improves system stability and safety.
Detailed description of the invention
Fig. 1 is the principle schematic diagram of the power signal processing circuit of one embodiment；
Fig. 2 is the principle schematic diagram of the power signal processing circuit of another embodiment；
Fig. 3 is the principle schematic diagram of the power signal processing circuit of another embodiment；
Fig. 4 is the electrical block diagram of the key detecting signal unit in one embodiment；
Fig. 5 is the electrical block diagram of the power signal input unit in one embodiment；
Fig. 6 is the electrical block diagram of the power signal output unit in one embodiment；
Fig. 7 is the electrical block diagram of the battery voltage acquisition unit in one embodiment；
Fig. 8 is the electrical block diagram of the main control unit in one embodiment.
Specific embodiment
It is with reference to the accompanying drawings and embodiments, right in order to which the objects, technical solutions and advantages of the application are more clearly understood
The application is further elaborated.It should be appreciated that specific embodiment described herein is only used to explain the application, and
It is not used in restriction the application.
Fig. 1 shows the structural schematic diagram of the power signal processing circuit in one embodiment comprising：It detects and exports
The Key detecting signal unit 102 of Key signal detects and exports the power signal input unit 103 of current power status signal,
It receives the control signal that main control unit 101 exports and is exported according to the power signal of control signal control power motor working condition
Unit 104, and the main control unit for controlling signal is exported according to the Key signal, the current power status signal
The output end of 101, Key detecting signal units 102 is connect with the first input end of main control unit 101, power signal input unit
Output end connect with the second input terminal of the main control unit, the first output end of the main control unit and the power signal
The input terminal of output unit connects.
Based on the scheme of embodiment as described above, power input signal is input to battery by the Key signal based on detection
The power signal processing circuit of management system, and export again after treatment to control the working condition of power motor, so as to
Power motor is output power to the state preferably according to battery, it is possible to prevente effectively from the problem of vehicle casts anchor, increases vehicle
Mileage travelled extends battery, improves system stability and safety.
Refering to what is shown in Fig. 2, in one embodiment, which may include：Interconnected point
Die block 1021 and the first light-coupled isolation module 1022, wherein the first light-coupled isolation module 1022 is connect with main control unit 101,
Export Key signal.
Refering to what is shown in Fig. 4, the Key detecting signal unit 102 in one embodiment includes：Diode Vp3, resistance Rp16,
Resistance Rp17, resistance Rp20, resistance Rp19, resistance Rp23, resistance Rp21, resistance Rp22, capacitor Cp22, capacitor Cp23, optocoupler
Gx2 and triode Qp7.
The anode connection input port of diode Vp3, the Key signal of input port access device, diode Vp3's is negative
Pole is connect with one end of resistance Rp16, and the other end of resistance Rp16 is connect with one end of one end of resistance Rp20, resistance Rp17, electricity
The other end of resistance Rp17 is connect with the first end (pin 1) of one end of capacitor Cp22, optocoupler Gx2, the other end, the electricity of resistance Rp20
Hold the other end ground connection of Cp22, the 4th end (pin 4) of optocoupler Gx2 passes through the port resistance Rp19 connection Power+, optocoupler Gx2
Third end (pin 3), one end of resistance Rp23, triode Qp7 base stage connect Key signal output port, triode Qp7
Collector connect with resistance R21, resistance Rp22, the other end of resistance Rp21 accesses power supply, the other end and electricity of resistance Rp22
Hold the first input end GPIO4 connection of Cp23 and control unit, the other end of resistance Rp23, triode Qp7 emitter with
And the other end ground connection of capacitor Cp23.
When Key signal closure, Key signal port is the cathode voltage (such as 60V, 72V) of battery pack, the voltage and light
2 feet (i.e. AGND) of coupling Gx2 generate pressure difference, which flows through the internal photo of Rp16, Rp17 and optocoupler Gx2, shape
At circuit, optocoupler is connected, therefore Power+ (this voltage is the battery anode voltage after filtering processing) can be transmitted
To the base stage of Key signal output end and triode Qp7：Key signal output end is used to open the power supply of BMS under off-position,
And Key state is passed to main control unit by GPIO4 by triode ON, main control unit enters electric discharge after receiving Key state
Otherwise operating condition is idle operating condition or charging operating condition.
Refering to what is shown in Fig. 2, in one embodiment, which may include：Interconnected
Bilinear light-coupled isolation module 1031 and the first amplifier follow module 1032, wherein the first amplifier follows module 1032 and master control
Unit 101 connects, the current power status signal that output detection obtains.
Refering to what is shown in Fig. 5, the second linear optical coupling isolation module 1031 in one embodiment includes：Resistance Rw3, resistance
Rw5, resistance Rw4, resistance Rw1, capacitor Cw4, capacitor Cw2, capacitor Cw1, operational amplifier U1B and linear analogue photoelectric coupling
One end of device ISO1, resistance Rw3 connects input port, which accesses power input signal, the other end of resistance Rw3 with
One end of capacitor Cw4 and the non-inverting input terminal connection of operational amplifier U1B, the inverting input terminal and electricity of operational amplifier U1B
The 4th pin connection of one end of Rw5, one end of capacitor Cw2 and linear analogue photoelectrical coupler ISO1 is hindered, capacitor Cw4's
The other end ground connection of the other end, resistance Rw5, the output end of operational amplifier U1B and the other end of capacitor Cw2 and resistance Rw4
One end connection, the other end of resistance Rw4 connect with the second pin of linear analogue photoelectrical coupler ISO1, linear analogue photoelectricity
The 5th pin of coupler ISO1 is connect after connecting with one end of one end of resistance Rw1, capacitor Cw1 with output port, resistance Rw1
The other end, capacitor Cw1 the other end ground connection.
With reference also to shown in Fig. 5, the first amplifier in one embodiment follows the module 1032 to include：Operational amplifier U2B,
Resistance Rw2, diode assembly Dw1 and capacitor Cw3, diode assembly Dw1 include two diodes being connected in series, and operation is put
The non-inverting input terminal of big device U2B connects input port, the output end and inverting input terminal and resistance Rw2 of operational amplifier U2B
One end connection, the other end of resistance Rw2 is grounded after connecting with one end of capacitor Cw3, and diode assembly Dw1 is connected to power end
Between ground, and the plus earth of diode assembly Dw1, the cathode of diode assembly Dw1 access power supply.
According to short, the empty disconnected principle of void of amplifier, flow through the electric current Ipd1=handle input voltages of 3 foot of ISO1 device and 4 feet/
Rw5.And for linear optical coupling ISO1, the electric current Ipd2 and Ipd1 of 6 foot, 5 foot are flowed through there are linear relationship k, Ipd2=k*Ipd1,
It is scaled voltage form：Vout/Rw1=k* handle input voltage vin/Rw5, configures, Vout=Vin/2 according to schematic diagram, because
This circuit realizes the function of electrical isolation, one times of voltage diminution.
Refering to what is shown in Fig. 2, in one embodiment, power signal output unit 104 includes：Third optocoupler interconnected
Isolation module 1041 and the second amplifier follow module 1042, wherein the input terminal and master control list of third light-coupled isolation module 1041
Member 101 connects, and receives the control signal that main control unit 101 exports.
Refering to what is shown in Fig. 6, the third light-coupled isolation module 1041 in one embodiment includes：Resistance Rw8, resistance Rw6, electricity
Hinder Rw7, resistance Rw10, capacitor Cw10, capacitor Cw7, capacitor Cw8, capacitor Cw9, operational amplifier U2A and linear analogue light
Electric coupler ISO2.
Wherein, input port is accessed in one end of resistance Rw8, and the other end and one end of capacitor Cw10, the operation of resistance Rw8 is put
One end of the non-inverting input terminal connection of big device U2A, the inverting input terminal of operational amplifier U2A and resistance Rw6, capacitor Cw9 one
The connection of the 4th pin of end and linear analogue photoelectrical coupler ISO2, the other end of the other end of capacitor Cw10, resistance Rw6
Power supply, capacitor are accessed in one end of ground connection, the cathode power supply end of operational amplifier U2A, one end of capacitor Cw7 and capacitor Cw8
The other end of Cw7, the other end of capacitor Cw8 are grounded, the negative power supply end ground connection of operational amplifier U2A, operational amplifier U2A
Output end connect with one end of the other end of capacitor Cw9, resistance Rw7, the other end of resistance Rw7 and linear analogue photoelectric coupling
The second pin of device ISO2 connects, and the 5th pin and resistance Rw10 and output port of linear analogue photoelectrical coupler ISO2 connects
It connects, the other end ground connection of resistance Rw10, the 6th pin of linear analogue photoelectrical coupler ISO2 accesses power supply.
Refering to what is shown in Fig. 6, the second amplifier in one embodiment follows the module 1042 to include：Capacitor Cw12, capacitor Cw6,
Capacitor Cw5, capacitor Cw11, resistance Rw9 and operational amplifier U1A.Wherein, the non-inverting input terminal of operational amplifier U1A and electricity
Input port, the other end ground connection of capacitor Cw12, the cathode power supply of operational amplifier U1A are connected after holding one end connection of Cw12
It terminates into power supply and is connect with one end of one end of capacitor Cw6, capacitor Cw5, the other end of the other end of capacitor Cw6, capacitor Cw5
Ground connection, the output end of operational amplifier U1A are connect with one end of the reverse input end of operational amplifier U1A, resistance Rw9, resistance
The other end of Rw9 connects output port, the other end, the operational amplifier U1A of capacitor Cw11 after connecting with one end of capacitor Cw11
Negative power supply end ground connection.
In one embodiment, as shown in figure 3, the power signal processing circuit of the present embodiment, can also include：It detects and defeated
The temperature detecting unit 105 of temperature signal out, the output end of temperature detecting unit 105 and the third input terminal of main control unit 101
Connection.Wherein, which may include more than two multiple.In one embodiment, temperature detecting unit
105 may include：It is electric for detecting the first temperature detecting unit of battery pack temperature, and for detecting the charge and discharge control
The second temperature detection unit of the temperature of driving switch pipe in road, the second temperature detection unit can be placed in driving switch pipe
Surface.
In one embodiment, as shown in figure 3, the power signal processing circuit of the present embodiment, can also include：It detects and defeated
The battery voltage acquisition unit 106 of voltage signal in wrapping out, the output end and master control list of battery voltage acquisition unit 106
The 4th input terminal connection of member 101.
Refering to what is shown in Fig. 7, the battery voltage acquisition unit in one embodiment includes：Division module 1061 and amplifier
Follow module 1062.Wherein, division module 1061 includes：Inductance Li3, inductance Li4, resistance Ri12, resistance Ri13, resistance
Ri14, resistance Ri15.Amplifier follows the module 1062 to include：Resistance Ri11, resistance Ri10, capacitor Ci10, capacitor Ci9, operation are put
Big device U4B, diode assembly Vi2.
Wherein, inductance Li3, resistance Ri12, resistance Ri13 are sequentially connected in series, and inductance Li3 is connected far from one end of resistance Ri12
B+ electrode, inductance Li4, resistance Ri14, resistance Ri15 are sequentially connected in series, and inductance Li4 connects B- electrode far from one end of resistance Ri14,
The one end far from resistance Ri12 resistance Ri13, resistance Ri15 connect far from one end of resistance Ri14 after as division module 1061
Output port.One end of resistance Ri11 as or connection amplifier follow the input port of module 1062, resistance Ri11's is another
End, capacitor Ci10 one end connect with the non-inverting input terminal of operational amplifier U4B, the other end of capacitor Ci10 is grounded, and operation is put
The output end of big device U4B is connect with one end of the inverting input terminal of operational amplifier U4B, resistance Ri10, and resistance Ri10's is another
End connects output port after connecting with one end of capacitor Ci9.The cathode of diode assembly Vi2 connects power supply, diode assembly Vi2
Anode, capacitor Ci9 the other end ground connection.
In one embodiment, as shown in figure 3, the power signal processing circuit of the present embodiment, can also include：It is connected to B-
The charge-discharge modules 107 being connect between electrode and P- electrode and with main control unit 101.Pass through charge-discharge modules 107, Ke Yishi
Now to the control of the charge and discharge of battery pack.
Based on the scheme of the embodiment of the present application as described above, one embodiment of the application also provides a kind of battery management
System, the battery management system include power signal processing circuit involved in any one above-mentioned embodiment.
The electrical block diagram of main control unit in one example as depicted in figure 8, as shown in figure 8, the main control unit 101 wrap
Include main control module 1101, crystal oscillator module 1102 and reseting module 1103, main control module 1101 and crystal oscillator module 1102 and reset mould
Block 1103 connects.It will be appreciated by those skilled in the art that the main control unit can also be realized in other way.
Based on the scheme of embodiment as described above, in Key signal input unit, Key signal detection first passes through voltage point
Pressure processing, obtains the electric current that optocoupler is reliably connected, the signal after light-coupled isolation is input to main control unit GPIO4 all the way, defeated all the way
Power module is arrived out.The power signal input acquisition of power signal input unit first passes through HCNR200 linear optical coupling isolation,
LM2904 amplifier follows the channel ADC4 for entering main control unit after reducing output impedance, and main control unit innernal CPU can obtain in real time
The power signal of input；Power signal output controls peripheral hardware DAC1 function by innernal CPU, and output power signal as needed is given
HCNR200 linear optical coupling, LM2904 amplifier are followed after reducing output impedance and are exported to peripheral control unit, so that controller can basis
Given power signal driving power-equipment work.Wherein, power signal here can be handle signal, be in power signal
When handle signal, controller can work according to given handle voltage driving motor.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The several embodiments of the application above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
The limitation to claim therefore cannot be interpreted as.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the concept of this application, various modifications and improvements can be made, these belong to the protection of the application
Range.Therefore, the scope of protection shall be subject to the appended claims for the application patent.
Claims (10)
1. a kind of power signal processing circuit, which is characterized in that including：
The Key detecting signal unit for detecting and exporting Key signal, is detected and the power signal for exporting current power status signal is defeated
Enter unit, receives the control signal of main control unit output and according to the power signal of control signal control power motor working condition
Output unit, and the main control unit for controlling signal is exported according to the Key signal, the current power status signal,
The output end of the Key detecting signal unit is connect with the first input end of the main control unit, and the power signal input is single
The output end of member is connect with the second input terminal of the main control unit, and the first output end and the power of the main control unit are believed
The input terminal connection of number output unit.
2. power signal processing circuit according to claim 1, it is characterised in that：
Further include：Detect the temperature detecting unit of simultaneously output temperature signal, the output end of the temperature detecting unit and the master
Control the third input terminal connection of unit；
The main control unit is according to the output of the Key signal, the current power status signal and the temperature signal
Control signal.
3. power signal processing circuit according to claim 2, which is characterized in that further include：The temperature detecting unit
Including two or more.
4. power signal processing circuit according to claim 1, which is characterized in that further include：
Detect and export the battery voltage acquisition unit of battery voltage signal, the output of the battery voltage acquisition unit
End is connect with the 4th input terminal of the main control unit；
The main control unit is defeated according to the Key signal, the current power status signal and the battery voltage signal
The control signal out.
5. power signal processing circuit according to claim 1, which is characterized in that further include：
The charge-discharge modules for being connected between B- electrode and P- electrode and being connect with the main control unit.
6. according to claim 1 to power signal processing circuit described in 5 any one, which is characterized in that the Key signal inspection
Surveying unit includes：Division module interconnected and the first light-coupled isolation module, described in first light-coupled isolation module output
Key signal.
7. according to claim 1 to power signal processing circuit described in 5 any one, which is characterized in that the power signal
Input unit includes：Second linear optical coupling isolation module and the first amplifier interconnected follow module, first amplifier with
The current power status signal is exported with module.
8. according to claim 1 to power signal processing circuit described in 5 any one, which is characterized in that the power signal
Output unit includes：Third linear light-coupled isolation module and the second amplifier interconnected follow module, the third linear light
The input terminal of coupling isolation module receives the control signal of the main control unit output.
9. power signal processing circuit according to claim 2, which is characterized in that the main control unit includes master control mould
Block, crystal oscillator module and reseting module, the main control module are connect with the crystal oscillator module and the reseting module.
10. a kind of battery management system, which is characterized in that including battery pack and as described in any one of claim 1 to 9 dynamic
Force signal processing circuit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820585332.4U CN208119093U (en) | 2018-04-23 | 2018-04-23 | Power signal processing circuit and battery management system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820585332.4U CN208119093U (en) | 2018-04-23 | 2018-04-23 | Power signal processing circuit and battery management system |
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| Publication Number | Publication Date |
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| CN208119093U true CN208119093U (en) | 2018-11-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108454543A (en) * | 2018-04-23 | 2018-08-28 | 长沙优力电驱动系统有限公司 | Power signal processing circuit and battery management system |
-
2018
- 2018-04-23 CN CN201820585332.4U patent/CN208119093U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108454543A (en) * | 2018-04-23 | 2018-08-28 | 长沙优力电驱动系统有限公司 | Power signal processing circuit and battery management system |
| CN108454543B (en) * | 2018-04-23 | 2024-04-09 | 长沙优力电驱动系统有限公司 | Power signal processing circuit and battery management system |
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