CN202817724U - Battery protection circuit for electric vehicle - Google Patents

Battery protection circuit for electric vehicle Download PDF

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Publication number
CN202817724U
CN202817724U CN 201220440797 CN201220440797U CN202817724U CN 202817724 U CN202817724 U CN 202817724U CN 201220440797 CN201220440797 CN 201220440797 CN 201220440797 U CN201220440797 U CN 201220440797U CN 202817724 U CN202817724 U CN 202817724U
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China
Prior art keywords
electric capacity
resistance
module
battery
detection module
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Expired - Fee Related
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CN 201220440797
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Chinese (zh)
Inventor
康龙云
姜凯
林玉健
赵先娴
朱洪波
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South China University of Technology SCUT
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South China University of Technology SCUT
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Priority to CN 201220440797 priority Critical patent/CN202817724U/en
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Publication of CN202817724U publication Critical patent/CN202817724U/en
Expired - Fee Related legal-status Critical Current
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Abstract

The utility model discloses a battery protection circuit for an electric vehicle. The battery protection circuit comprises a main circuit, a voltage detection module, a battery loop current detection module, a battery temperature detection module, an electric vehicle inertia detection module, an electromagnetic relay switch module and a single-chip microcomputer control module. The detection modules detect a battery cell voltage, a battery loop current and a battery temperature, and transmit signals to the single-chip microcomputer control module for the analysis of variation tendency of the current, the voltage and the temperature. With the battery protection circuit, not only the detection of the external voltage and current of the electric vehicle battery, and the cut-off protection under abnormal states, such as states of over-voltage, over-current, under-voltage, etc. are realized, but also the prediction of the output characteristics of the battery, and the detection and protection of charging abnormity of the battery are realized; besides, vehicle inertia detection is performed, so that when the electric vehicle fails with the battery intact , a power supply circuit is enabled to be cut off in time to prevent the burning and explosion of the battery.

Description

A kind of batteries of electric automobile protective circuit
Technical field
The utility model relates to pure electric automobile, field of hybrid electric vehicles, is specifically related to the batteries of electric automobile protective circuit.
Background technology
At present the battery protection technology of electric automobile comprises the two large divisions: the one, by to outside batteries additional metal or non-metallic device; realize battery and outside completely cutting off; prevent battery is damaged or alleviate battery collision and vibrations; prevent battery burning and blast with this, realize the protection to electric automobile and personnel.The 2nd, be implemented in the power supply that in time cuts off electric automobile under the abnormal conditions by the control to batteries of electric automobile loop break-make, realize the protection to battery and personnel.Mainly be by the voltage of main circuit, the detection of electric current and the comparative analysis of reference voltage and reference current being judged whether the operating state of battery is normal, controlling thus the break-make (such as " a kind of super low-power consumption lithium ionic battery protection circuit ", " protection system of lithium ion battery " etc.) of major loop.Used method has the circuit abnormality self-locking, detects real time end voltage judgement maximum discharge current etc.These methods just realize management to battery by the parameter that detects foreign current, voltage; the inside state-of-charge of battery is not estimated and predicted; can not predict the inside charging characteristic of battery; and hysteresis quality has also just appearred in control, can not in time predict and to the protection of circuit battery failures.Simultaneously these devices are not considered when all kinds of fault such as collision and rollover appears in the intact situation of battery electric automobile the timely protection of battery are caused damage to prevent battery because collision waits, thereby burning and explosion phenomenon occur.
The utility model content
In view of above background; in order to overcome existing deficiency; a kind of batteries of electric automobile protective circuit is provided; this circuit has not only been realized the external voltage to batteries of electric automobile; the detection of electric current; to overvoltage; overcurrent; tripping protection under the abnormalities such as under voltage; and increased output voltage; electric current; the variation numerical value of battery temperature carries out differential to be processed; realized the look-ahead to the battery output characteristic; and realized estimation to the inside battery state-of-charge by using Kalman filtering method and Ah measurement Law; battery charged unusually detected and protect, also detect burning and the blast that the circuit of in time cutting off the electricity supply when guaranteeing that all kinds of fault such as collision and rollover appears in the intact situation of battery electric automobile prevents battery by the inertia to automobile.This circuit has been realized the more comprehensively protection to battery and personnel.In order to achieve the above object, the technical scheme taked of the utility model is as follows.
A kind of batteries of electric automobile protective circuit comprises main circuit, voltage detection module, cell circuit current detection module, battery temperature detection module, electric automobile inertia detection module, electromagnetic relay switch module, and single chip control module; Main circuit comprises the series connection of many group cells, be used for providing electric car power supply, two termination voltage detection module of each cell, cell circuit current detection module and charger or load are serially connected in the cell circuit, the cell circuit current detection module also is in series with an electromagnetic relay switch for detection of the loop total current in the cell circuit; The two ends of two each battery cell of termination of voltage detection module are used for the in real time voltage of each cell of detection, the output access single chip control module of voltage detection module; Temperature detecting module is for detection of the temperature of cell, and the output of battery temperature detection module connects single chip control module; Electric automobile inertia detection module is connected with single chip control module, for detection of the outside running status of electric automobile; The control end of electromagnetic relay switch is connected to one-chip computer module; Single chip control module is used for output signal each module is controlled.
Further, above-mentioned batteries of electric automobile protective circuit also comprises power supply module, and each module is powered.
Further, voltage detection module comprises the first resistance, the second resistance, the 3rd resistance, the first electric capacity, the second electric capacity, and the first amplifier; The first resistance is connected with the second resistance, the first electric capacity is in parallel with the second resistance, the first amplifier normal phase input end connects the first resistance and the second resistance link, the anti-phase termination output of the first amplifier, the second Capacitance parallel connection is connected between the first amplifier output and the ground, the output of the 3rd resistance one termination the first amplifier, the other end are connected to the 3rd A/D conversion IO mouth of single-chip microcomputer.
Further, the cell circuit current detection module comprises the first current sensor, the second amplifier, the 3rd electric capacity, the 4th resistance, the 4th electric capacity, the 5th resistance, the 6th resistance, the 7th resistance, and the 5th electric capacity; The electric current of main circuit flows into and flows out from the negative terminal of the first current sensor from the first current sensor anode, the power end VCC of the first current sensor connects positive 5v power supply, the earth terminal GND ground connection of the first current sensor, the voltage signal output end Vout of the first current sensor connects an end of the 4th resistance, the inverting input of another termination the second amplifier of the 4th resistance, the 3rd Capacitance parallel connection is connected between the earth terminal GND of the power end VCC of the first current sensor and the first current sensor, the 4th Capacitance parallel connection is connected between the inverting input and ground of the second amplifier, the 6th resistance is connected between the inverting input and output of the second amplifier, the 5th resistance is connected between the positive input and ground of the second amplifier, the 7th resistance one terminates to the output of the second amplifier, the other end is received the 2nd A/D conversion IO mouth of single-chip microcomputer, and the 5th electric capacity is connected between the 2nd A/D conversion IO mouth and ground of single-chip microcomputer.
Further, the battery temperature detection module comprises the first temperature sensor and the 18 electric capacity, the power end VDD of the first temperature sensor connects+the 5v power supply, the 2nd A/D conversion IO mouth of the first temperature sensor signal output DQ termination single-chip microcomputer, the 18 Capacitance parallel connection is connected to+the 5v VDD-to-VSS between, the GND end ground connection of the first temperature sensor.
Further, described inertia detection module comprises inertial sensor.
Further, the electromagnetic relay switch module comprises the first triode, the tenth resistance, the first diode and the first electromagnetic relay current coil, the base stage of the first triode connects the P3.0 pin of single-chip microcomputer, and collector electrode connects an end of the first electromagnetic relay current coil, another termination of the first electromagnetic relay current coil+12v power supply, the first diode inverse parallel is connected to the first electromagnetic relay current coil two ends, and the emitter of the first triode connects an end of the tenth resistance, the tenth resistance other end ground connection.
Further, power supply module comprises two parts, and first is output as+12v, and second portion is output as+5v; First comprises the 17 electric capacity, the second diode, the 3rd diode, the first voltage stabilizing chip, the 16 electric capacity, and the 15 electric capacity; The 17 electric capacity is connected to b+ end and the b-end of batteries of electric automobile monomer, the input Vin termination b+ end of the first voltage stabilizing chip U4, the GND end ground connection of the first voltage stabilizing chip, forward connects the second diode between ground and cell negative pole b-, oppositely connect the 3rd diode, the Vout of the first voltage stabilizing chip end is+the 12v output, connects the 15 electric capacity and the 16 electric capacity between+12v output and ground; Second portion comprises the second voltage stabilizing chip, the 19 electric capacity and the 20 electric capacity; The 19 electric capacity is connected to+the 12v VDD-to-VSS between, the input Vin termination of the second voltage stabilizing chip+12v power end, the GND end ground connection of the second voltage stabilizing chip, the Vout end of the second voltage stabilizing chip is output+5v power end, the 20 electric capacity is connected between the Vout end and ground of the second voltage stabilizing chip.
Further, single chip control module comprises the STC12C5206 single-chip microcomputer, the 9th electric capacity, the tenth electric capacity, the 8th resistance, the 6th electric capacity, the 7th electric capacity, the 8th electric capacity and crystal oscillator XTAL; The VCC of single-chip microcomputer connects+the 5v power supply, the 9th electric capacity and the tenth electric capacity are connected between the VDD-to-VSS, crystal oscillator XTAL is connected between the XTAL1 and XTAL2 pin of single-chip microcomputer, the 7th electric capacity is connected between XTAL2 and the ground, the 8th electric capacity is connected between XTAL1 and the ground, RST termination the 6th electric capacity negative terminal of single-chip microcomputer, the positive termination of the 6th electric capacity+5v power supply, the 8th resistance is connected between the RST and ground of single-chip microcomputer.
In the above-mentioned batteries of electric automobile protective circuit; by voltage; electric current; temperature; the detection of inertia four aspects; send into single-chip microcomputer; SOC to batteries of electric automobile accurately estimates with Kalman filtering method and Ah measurement Law, through the overvoltage that comparative analysis occurs circuit, overcurrent; temperature anomaly; and unusually the detecting of battery charge state, prevent in advance battery failures, and detect with the outside running status of inertial sensor to automobile; carry out circuit protection for unusual collision and suddenly acceleration and deceleration, realize in advance to the prevention of battery or motor-vehicle accident and to the general protection of personal safety.
Compared with prior art; the utlity model has following advantage and technique effect: each scheme of the present utility model and combination thereof have not only realized the external voltage to batteries of electric automobile; the detection of electric current; to overvoltage; overcurrent; tripping protection under the abnormalities such as under voltage; and increased output voltage; electric current; battery temperature detects; carry out the differential processing by single-chip microcomputer to changing numerical value; realized the look-ahead to the battery output characteristic; and can realize estimation to the inside battery state-of-charge by using Kalman filtering method and Ah measurement Law; battery charged unusually detected and protect, can also detect by the inertia to automobile burning and blast that the circuit that guarantee in time to cut off the electricity supply when all kinds of fault such as collision and rollover appears in the intact situation of battery electric automobile prevents battery.This circuit has been realized the more comprehensively protection to battery and personnel.The utility model also is applicable to the construction field of the electric automobile infrastructure of the control technology of miniaturization, the intellectuality of electric automobile and intelligent grid interaction, high efficiency two-way charging station system and smart grid-oriented.
Description of drawings
Fig. 1 is the overall construction drawing of batteries of electric automobile protective circuit.
Fig. 2 is the circuit diagram of voltage detection module among the embodiment.
Fig. 3 is the circuit diagram of cell circuit current detection module among the embodiment.
Fig. 4 is battery temperature detection module circuit diagram among the embodiment.
Fig. 5 is electric automobile inertia detection module circuit diagram among the embodiment.
Fig. 6 is electromagnetic relay switch module among the embodiment.
Fig. 7 is single chip control module circuit diagram among the embodiment.
Fig. 8 a and Fig. 8 b are respectively 12V and the 5V power circuit diagrams of power supply module among the embodiment.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described further, but enforcement of the present utility model and protection range are not limited to this.
Fig. 1 has provided the overall construction drawing of the batteries of electric automobile protective circuit of the utility model example; comprising main circuit; voltage detection module; the cell circuit current detection module; the battery temperature detection module; electric automobile inertia detection module, electromagnetic relay switch module, single chip control module and power supply module.Main circuit provides electric car power supply by the series connection of many groups cell, each cell connects voltage detection module, and the cell circuit current detection module seals in major loop, is connected to charger or load, seal in again an electromagnetic relay switch K, the switch of control major loop.The voltage of every group of cell is detected at the two ends of the every Battery pack monomer of voltage detection module two terminations in real time, the A/D conversion IO mouth P1.0 of circuit output access single-chip microcomputer; The cell circuit current detection module seals in the battery major loop, detects the loop total current, the 2nd A/D conversion IO mouth P1.1 of output access single-chip microcomputer; The output of battery temperature detection module meets the 3rd A/D conversion IO mouth P1.2 of single-chip microcomputer; Electric automobile inertia detection module control end and input access respectively the pin of single-chip microcomputer; Electromagnetic relay switch module switch string is in the main circuit loop, and the control input end of the current coil of its control connects single-chip microcomputer; Single chip control module connects input and the control signal of each module, and output signal is controlled each module; Power supply comprises 12v and 5v power supply unit, and each module is powered.
Fig. 2 has provided batteries of electric automobile protective circuit battery cell voltage detection module, the first resistance R 1, the second resistance R 2, the three resistance R 3, the first capacitor C 1, the second capacitor C 2, and the first amplifier U1A; The first electric capacity and the second capacitances in series, the first electric capacity is in parallel with the second resistance, the first amplifier normal phase input end connects the second resistance positive terminal, anti-phase termination the first amplifier output, the second Capacitance parallel connection is connected between the first amplifier output and the ground, the 3rd resistance one is terminated at the output of the first amplifier, and the other end is connected to the 3rd A/D conversion IO port P1.2 of single-chip microcomputer.This module is carried out voltage real-time monitoring to each cell, inputs single-chip microcomputer after the A/D conversion, and the voltage parameter of battery is provided.
Fig. 3 has provided cell circuit current detection module in the batteries of electric automobile protective circuit, comprises the first current sensor U1, the second amplifier U2A, the 3rd capacitor C 3, the 4th resistance R 4, the four capacitor C 4, the five resistance R 5, the 6th resistance R 6, the seven resistance R 7, and the 5th capacitor C 5; The I+ end of the first current sensor IP+ termination major loop, the I-end of the IP-termination major loop of the first current sensor, the VCC of one current sensor connects positive 5v power supply, GND holds ground connection, Vout connects an end of the 4th electric capacity, the inverting input of another termination the second amplifier of the 4th electric capacity, the 3rd Capacitance parallel connection is connected between VCC and the ground GND, the 4th Capacitance parallel connection is connected between the inverting input and ground of the second amplifier, inverting input and output the 5th resistance that the 6th resistance is connected to the second amplifier are connected between the positive input and ground of the second amplifier, the 7th resistance one terminates to the output of the second amplifier, the other end is received the 2nd A/D conversion IO port P1.1 of single-chip microcomputer, and the 5th electric capacity is connected between the 2nd A/D conversion IO port and ground of single-chip microcomputer.The electric current of this module Real-Time Monitoring battery major loop is inputted single-chip microcomputer after the A/D conversion, the current parameters of cell circuit is provided.
Fig. 4 has provided battery temperature detection module in the batteries of electric automobile protective circuit, comprises the first temperature sensor U2 and the 18 capacitor C 18.The vdd terminal of the first temperature sensor connects+the 5v power supply, the 3rd A/D of DQ termination single-chip microcomputer conversion IO port P1.2 mouth, the 18 Capacitance parallel connection be connected to+the 5v VDD-to-VSS between, the GND end ground connection of the first temperature sensor.This module is monitored the temperature of battery, inputs single-chip microcomputer after the A/D conversion, and the temperature parameter of battery is provided.
Fig. 5 has provided that electric automobile inertia detection module comprises that electric automobile inertia detection module comprises the first inertial sensor U3(existing product in the batteries of electric automobile protective circuit); the 11 capacitor C 11; the 12 capacitor C 12, the 13 capacitor C 13, the 14 capacitor C 14.The VCC termination of the first inertial sensor U3+5v power supply, the 14 capacitor C 14 is connected to Vssa end and the Cref end of the first inertial sensor U3, the 13 capacitor C 14 is connected to Vssa end and the Cfega end of the first inertial sensor U3, the 12 electric capacity is connected to Vssa end and the Creg end of the first inertial sensor U3, the 11 capacitor C 11 is connected between the VCC and ground of the first inertial sensor U3, and the Vssa end of the first inertial sensor U3, Vss end, Vpp/TEST hold ground connection.This module is monitored the operation inertia of electric automobile, outputs signal to single-chip microcomputer, and inertial parameter is provided.
Fig. 6 has provided that the electromagnetic relay switch module comprises in the batteries of electric automobile protective circuit: the first triode Q1, the tenth resistance R 10, the first diode D1 and the first electromagnetic relay current coil L.The base stage of the first triode connects the P3.0 mouth of single-chip microcomputer, collector electrode connects an end of the first electromagnetic relay current coil, another termination of the first electromagnetic relay current coil+12v power supply, the first diode inverse parallel is connected to the first electromagnetic relay current coil two ends, the emitter of the first triode connects the tenth resistance, the tenth resistance other end ground connection.This module is by the output of single-chip microcomputer control, and the beginning of main circuit is controlled.
Fig. 7 has provided that power supply module comprises two parts in the batteries of electric automobile protective circuit, and first is output as+12v, and second portion is output as+5v; First comprises the 17 capacitor C 17, the second diode D2, the 3rd diode D3, the first voltage stabilizing chip U4, the 16 capacitor C 16, and the 15 capacitor C 15; The 17 electric capacity is connected to b+ end and the b-end of batteries of electric automobile monomer, the input Vin termination b+ end of the first voltage stabilizing chip U4, the GND end ground connection of the first voltage stabilizing chip U4, forward meets the second diode D2 between ground and cell negative pole b-, oppositely meet the 3rd diode D3, the Vout of the first voltage stabilizing chip U4 end is+the 12v output, connects the 15 capacitor C 15 and the 16 capacitor C 16 between+12v output and ground; Second portion comprises the second voltage stabilizing chip U5, the 19 capacitor C 19 and the 20 capacitor C 20; The 19 electric capacity is connected to+the 12v VDD-to-VSS between, the input Vin termination of the second voltage stabilizing chip U5+12v power end, the GND end ground connection of the second voltage stabilizing chip U5, the Vout end of the second voltage stabilizing chip U5 is output+5v power end, and the 20 capacitor C 20 is connected between the Vout end and ground of the second voltage stabilizing chip U5.This module provides power supply for single-chip microcomputer and each chip.
Fig. 8 has provided that single chip machine controlling circuit comprises in the batteries of electric automobile protective circuit: comprise the STC12C5206 single-chip microcomputer; the 9th capacitor C 9; the tenth capacitor C 10; the 8th resistance R 8; the 6th capacitor C 6; the 7th capacitor C 7; the 8th capacitor C 8 and crystal oscillator XTAL, the VCC of single-chip microcomputer connect+the 5v power supply, and the 9th electric capacity and the tenth electric capacity are connected between the VDD-to-VSS; XTAL is connected between the XTAL1 and XTAL2 of single-chip microcomputer; the 7th electric capacity is connected between XTAL2 and the ground, and the 8th electric capacity is connected between XTAL1 and the ground, RST termination the 6th electric capacity negative terminal of single-chip microcomputer; the positive termination of the 6th electric capacity+5v power supply, the 8th resistance is connected between RST and the ground.
In this example, single chip control module is at first with the input of monomer battery voltage detection module, main circuit current detection module, battery temperature detection module, with reference voltage relatively, the SOC to battery calculates with Kalman filtering method and Ah measurement Law, and the state-of-charge of assurance battery is normal.Secondly to overvoltage, under voltage, overcurrent phenomenon are judged, in time give electromagnetic relay module switch signal.To voltage, the collection signal of electric current and temperature carries out differential again, judges whether its variation tendency is normal, undesiredly then cuts off the electricity supply.In addition, by the detection of inertial sensor, judge for the acceleration and deceleration of electric automobile or collision rolling etc., in time control the break-make of cell circuit electromagnetic relay switch.

Claims (9)

1. a batteries of electric automobile protective circuit is characterised in that to comprise main circuit, voltage detection module, cell circuit current detection module, battery temperature detection module, electric automobile inertia detection module, electromagnetic relay switch module, and single chip control module; Main circuit comprises the series connection of many group cells, be used for providing electric car power supply, two termination voltage detection module of each cell, cell circuit current detection module and charger or load are serially connected in the cell circuit, the cell circuit current detection module also is in series with an electromagnetic relay switch for detection of the loop total current in the cell circuit; The two ends of two each battery cell of termination of voltage detection module are used for the in real time voltage of each cell of detection, the output access single chip control module of voltage detection module; Temperature detecting module is for detection of the temperature of cell, and the output of battery temperature detection module connects single chip control module; Electric automobile inertia detection module is connected with single chip control module, for detection of the outside running status of electric automobile; The control end of electromagnetic relay switch is connected to one-chip computer module; Single chip control module is used for output signal each module is controlled.
2. batteries of electric automobile protective circuit according to claim 1 is characterised in that also to comprise power supply module, and each module is powered.
3. batteries of electric automobile protective circuit according to claim 1 is characterised in that voltage detection module comprises the first resistance (R1), the second resistance (R2), the 3rd resistance (R3), the first electric capacity (C1), the second electric capacity (C2), and the first amplifier (U1A); The first resistance (R1) is connected with the second resistance (R2), the first electric capacity (C1) is in parallel with the second resistance (R2), the first amplifier (U1A) normal phase input end connects the first resistance (R1) and the second resistance (R2) link, the anti-phase termination output of the first amplifier, the second electric capacity (C2) is connected between the first amplifier (U1A) output and the ground, the output of the 3rd resistance (R3) termination the first amplifier (U1A), the other end are connected to the 3rd A/D conversion IO mouth (P1.2) of single-chip microcomputer.
4. batteries of electric automobile protective circuit according to claim 1, be characterised in that the cell circuit current detection module comprises the first current sensor (U1), the second amplifier (U2A), the 3rd electric capacity (C3), the 4th resistance (R4), the 4th electric capacity (C4), the 5th resistance (R5), the 6th resistance (R6), the 7th resistance (R7), and the 5th electric capacity (C5); The electric current of main circuit flows into and flows out from the negative terminal of the first current sensor from the first current sensor anode, the power end VCC of the first current sensor connects positive 5v power supply, the earth terminal GND ground connection of the first current sensor, the voltage signal output end Vout of the first current sensor connects an end of the 4th resistance (R4), the inverting input of another termination the second amplifier (U2A) of the 4th resistance (R4), the 3rd Capacitance parallel connection is connected between the earth terminal GND of the power end VCC of the first current sensor and the first current sensor, the 4th Capacitance parallel connection is connected between the inverting input and ground of the second amplifier (U2A), the 6th resistance (R6) is connected between the inverting input and output of the second amplifier (U2A), the 5th resistance (R5) is connected between the positive input and ground of the second amplifier (U2A), the 7th resistance (R7) one terminates to the output of the second amplifier (U2A), the other end is received the 2nd A/D conversion IO mouth (P1.1) of single-chip microcomputer, and the 5th electric capacity (C5) is connected between the 2nd A/D conversion IO mouth (P1.1) and ground of single-chip microcomputer.
5. batteries of electric automobile protective circuit according to claim 1; be characterised in that the battery temperature detection module comprises the first temperature sensor (U2) and the 18 electric capacity (C18); the power end VDD of the first temperature sensor (U2) connects+the 5v power supply; the 2nd A/D conversion IO mouth (P1.1) of the first temperature sensor (U2) signal output part DQ termination single-chip microcomputer; the 18 electric capacity (C18) is connected in+the 5v VDD-to-VSS between, the GND end ground connection of the first temperature sensor (U2).
6. batteries of electric automobile protective circuit according to claim 1 is characterised in that described inertia detection module comprises inertial sensor.
7. batteries of electric automobile protective circuit according to claim 1; be characterised in that the electromagnetic relay switch module comprises the first triode (Q1); the tenth resistance (R10); the first diode (D1) and the first electromagnetic relay current coil (L); the base stage of the first triode (Q1) connects the P3.0 pin of single-chip microcomputer; collector electrode connects an end of the first electromagnetic relay current coil (L); another termination of the first electromagnetic relay current coil (L)+12v power supply; the first diode (D1) inverse parallel is connected to the first electromagnetic relay current coil (L) two ends; the emitter of the first triode (Q1) connects an end of the tenth resistance (R10), the tenth resistance (R10) other end ground connection.
8. batteries of electric automobile protective circuit according to claim 1 is characterised in that power supply module comprises two parts, and first is output as+12v, and second portion is output as+5v; First comprises the 17 electric capacity (C17), the second diode (D2), the 3rd diode (D3), the first voltage stabilizing chip (U4), the 16 electric capacity (C16), and the 15 electric capacity (C15); The 17 electric capacity is connected to b+ end and the b-end of batteries of electric automobile monomer, the input Vin termination b+ end of the first voltage stabilizing chip U4, the GND end ground connection of the first voltage stabilizing chip (U4), forward connects the second diode (D2) between ground and cell negative pole b-, oppositely connect the 3rd diode (D3), the Vout of the first voltage stabilizing chip (U4) end is+the 12v output, connects the 15 electric capacity (C15) and the 16 electric capacity (C16) between+12v output and ground; Second portion comprises the second voltage stabilizing chip (U5), the 19 electric capacity (C19) and the 20 electric capacity (C20); The 19 electric capacity is connected to+the 12v VDD-to-VSS between, the input Vin termination of the second voltage stabilizing chip (U5)+12v power end, the GND end ground connection of the second voltage stabilizing chip (U5), the Vout end of the second voltage stabilizing chip (U5) is output+5v power end, and the 20 electric capacity (C20) is connected between the Vout end and ground of the second voltage stabilizing chip (U5).
9. each described batteries of electric automobile protective circuit according to claim 1~8, be characterised in that single chip control module comprises the STC12C5206 single-chip microcomputer, the 9th electric capacity (C9), the tenth electric capacity (C10), the 8th resistance (R8), the 6th electric capacity (C6), the 7th electric capacity (C7), the 8th electric capacity (C8) and crystal oscillator XTAL; The VCC of single-chip microcomputer connects+the 5v power supply, the 9th electric capacity (C9) and the tenth electric capacity (C10) are connected between the VDD-to-VSS, crystal oscillator XTAL is connected between the XTAL1 and XTAL2 pin of single-chip microcomputer, the 7th electric capacity (C7) is connected between XTAL2 and the ground, the 8th electric capacity (C8) is connected between XTAL1 and the ground, RST termination the 6th electric capacity (C6) negative terminal of single-chip microcomputer, the positive termination of the 6th electric capacity (C6)+5v power supply, the 8th resistance (R8) is connected between the RST and ground of single-chip microcomputer.
CN 201220440797 2012-08-31 2012-08-31 Battery protection circuit for electric vehicle Expired - Fee Related CN202817724U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220440797 CN202817724U (en) 2012-08-31 2012-08-31 Battery protection circuit for electric vehicle

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Application Number Priority Date Filing Date Title
CN 201220440797 CN202817724U (en) 2012-08-31 2012-08-31 Battery protection circuit for electric vehicle

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102856886A (en) * 2012-08-31 2013-01-02 华南理工大学 Electromobile battery protecting circuit
CN103199503A (en) * 2013-03-29 2013-07-10 奇瑞汽车股份有限公司 Protective circuit of vehicle-mounted charger
CN103364099A (en) * 2012-03-28 2013-10-23 三星电子株式会社 System and method of predicting temperature of device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103364099A (en) * 2012-03-28 2013-10-23 三星电子株式会社 System and method of predicting temperature of device
CN103364099B (en) * 2012-03-28 2018-01-23 三星电子株式会社 The method for predicting device temperature
CN102856886A (en) * 2012-08-31 2013-01-02 华南理工大学 Electromobile battery protecting circuit
CN103199503A (en) * 2013-03-29 2013-07-10 奇瑞汽车股份有限公司 Protective circuit of vehicle-mounted charger
CN103199503B (en) * 2013-03-29 2015-01-28 奇瑞汽车股份有限公司 Protective circuit of vehicle-mounted charger

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