CN109687558A - The control system and method for multi-series lithium battery group shielding failure - Google Patents

The control system and method for multi-series lithium battery group shielding failure Download PDF

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Publication number
CN109687558A
CN109687558A CN201910134630.0A CN201910134630A CN109687558A CN 109687558 A CN109687558 A CN 109687558A CN 201910134630 A CN201910134630 A CN 201910134630A CN 109687558 A CN109687558 A CN 109687558A
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CN
China
Prior art keywords
circuit
charging
control
lithium battery
governor
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CN201910134630.0A
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Chinese (zh)
Inventor
欧阳宇卿
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深圳市超能威电子有限公司
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Priority to CN201910134630.0A priority Critical patent/CN109687558A/en
Publication of CN109687558A publication Critical patent/CN109687558A/en

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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/0031Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries

Abstract

The invention discloses the control systems and method of a kind of multi-series lithium battery group shielding failure; charger is connected including charging port; multi-series lithium battery group is connect with charging control circuit; detection circuit and charging control circuit pass through charging port respectively and are connected to external charger, and charging failure switching circuit is connected between charging port and charging control circuit;Obtain the Current Voltage value that voltage detecting circuit detects, whether charging control circuit fails in all cases for analysis, and when judging charging control circuit failure, disablement signal is exported to charging failure switching circuit, charging failure switching circuit disconnects, and then the charging port and charging control circuit are disconnected;Meanwhile the governor circuit sends instructions to external device by telecommunication circuit, realizes analysis and protection to charging control circuit, and user can be allowed timely to recognize situation, powers off in time, avoids causing danger.

Description

The control system and method for multi-series lithium battery group shielding failure
Technical field
The present invention relates to the control system of charge and discharge electro-technical field more particularly to a kind of multi-series lithium battery group shielding failure and Method.
Background technique
It by lithium metal or lithium alloy is negative electrode material, using the battery of non-aqueous electrolytic solution that lithium battery, which is a kind of, due to The chemical characteristic of lithium metal is very active, so that the processing of lithium metal, preservation, use, very high to environmental requirement, so, lithium Battery is not applied for a long time, and with the development of science and technology, present lithium battery has become mainstream, and lithium battery substantially may be used It is divided into two classes: lithium metal battery and lithium ion battery, lithium ion battery does not contain the lithium of metallic state, and can charge, Lithium battery is because the advantages of its storage energy density is high, long service life, is more and more used, but lithium battery is using one It generally requires to charge after the section time, and in existing charging protective circuit of lithium cell, overcharge, over-discharge are provided for battery Electricity, overcurrent and charger such as are not inconsistent at the defencive functions, generally control whether to charge by a metal-oxide-semiconductor, once metal-oxide-semiconductor damages, It can not then stop charging when lithium battery is fully charged or when charger is not inconsistent, overdischarge can not stop discharging, and be easy to cause because of lithium Over-charging of battery and explosion on fire occurs, so being badly in need of wanting a kind of that charging electricity can be disconnected in time when the metal-oxide-semiconductor of charging damages Road, and user is notified in time, so that it effectively prevent lithium battery that explosion on fire occurs because of the various situations in front, it is electric to charging is improved The safety on road, it is clear that there is positive realistic meaning.
Summary of the invention
Shortcoming present in view of the above technology, the present invention provide a kind of control of multi-series lithium battery group shielding failure System and method can occur overcharging, in the various situations such as over-discharge or charger are not inconsistent, when charging control circuit fails, energy Analysis is carried out in time and by charging control circuit and charging port, and notify user in time.
The present invention provides a kind of control system of multi-series lithium battery group shielding failure, including charging port, multi-series lithium battery Group, charging control circuit, governor circuit, detection circuit, protection circuit, charging failure switching circuit and telecommunication circuit, it is described to fill Electric port is connect with charging control circuit, and the multi-series lithium battery group and charging control circuit couple, the charge protector It is connect with charging control circuit, the detection circuit is connect with protection circuit, governor circuit, and the charging failure switching circuit connects It connects between the charging port and charging control circuit, the charging failure switching circuit is connect with governor circuit, the inspection It surveys unit also to connect with multi-series lithium battery group, charging control unit, the governor circuit is also connect with telecommunication circuit;
When the detection circuit detects voltage and or current value exception or fills full, pass through protection circuit and/or governor circuit control System control charging control circuit disconnects, at this point, governor circuit continues to the second electric current of detection circuit detection, if at this time the Two electric currents are greater than zero, then judge that charging control circuit fails, and governor circuit control failure switching circuit separates the charge control Circuit and charging port simultaneously issue instruction to external device by telecommunication circuit.
Wherein, the detection circuit includes voltage detecting circuit, the anode of the voltage detecting circuit and multi-series lithium battery Connection, and the voltage detecting circuit is also connect with the governor circuit, protection circuit and charging port.
Wherein, the detection circuit further includes current detection circuit, and the current detection circuit and charging control unit connect Connect, the current detection circuit also with the governor circuit, protection circuit connection.
It wherein, further include that electric discharge failure switching circuit and sequentially connected electric discharge port, charge/discharge control circuit and electric discharge are lost Switching circuit is imitated, the electric discharge failure switching circuit is connect with governor circuit, the charge/discharge control circuit and governor circuit, protection Circuit connection, the detection circuit are also connect with charge/discharge control circuit.
It wherein, further include voice broadcast circuit, the voice broadcast circuit includes speech chip and player, the voice The input terminal of chip is connect with the governor circuit, and the output end of the speech chip is connect with player, when the master control electricity When road judges charging control circuit failure, the governor circuit control speech chip enables player make a sound.
The present invention also provides a kind of control methods of multi-series lithium battery group shielding failure, comprising:
The governor circuit and the/protection circuit obtain the voltage and or current value that detects of detection circuit, according to the electricity Pressure and/or current value judge whether exception or fill full;
When judgement exception occurs or fills full, the governor circuit or protection circuit control charging control circuit are disconnected, at this point, inspection Slowdown monitoring circuit continues to test the second current value of charging control circuit, if the second current value is zero, charging control circuit is positive Often;If the second current value is greater than zero, the charging control circuit failure is determined;
The governor circuit exports disablement signal to charging failure switching circuit, and charging failure switching circuit is enabled to disconnect, and then by The charging port and charging control circuit disconnect;Meanwhile the governor circuit sends instructions to the external world by telecommunication circuit and sets It is standby.
Wherein, the governor circuit obtains the voltage and or current value that detection circuit detects, according to the voltage and/ Or current value judges whether to include: the first electricity that the governor circuit obtains the charger that voltage detecting circuit detects in exception Pressure value judges whether the rechargeable standard for meeting multi-series lithium battery group according to the first voltage value, and when the voltage value is not inconsistent When closing the rechargeable standard of multi-series lithium battery group, it is judged as that appearance is abnormal.
Wherein, the governor circuit obtains the voltage and or current value that detection circuit detects, according to the voltage and/ Or current value judges whether exception or fills in full to include: that the protection circuit and governor circuit obtain voltage and current detection circuit inspection The second voltage value and third current value of survey, the protection circuit judge whether occurred according to the two voltage and currents value It fills, when overcharging, is judged as that appearance is abnormal;The governor circuit judges whether to fill according to the two voltage and currents value It is full, when occurring filling full, be judged as fill it is full.
Wherein, before when judgement exception occurs or fills full, further includes: the governor circuit and/or protection circuit obtain The tertiary voltage and the 4th current value for the control of discharge unit for taking detection circuit to detect, according to the tertiary voltage and the 4th electricity Flow valuve judges whether over-discharge, when judgement is in over-discharge state, is judged as that appearance is abnormal.
Wherein, described and then after disconnecting the charging port and charging control circuit, further includes: send failure and refers to Enable speech chip;Speech chip judges that charging control circuit fails according to failure instruction, and the speech chip control is broadcast Hair device makes a sound, and alarms.
The beneficial effects of the present invention are: compared with prior art, multi-series lithium battery group shielding failure provided by the invention Control system and method, multi-series lithium battery group are connect with charging control circuit, and detection circuit and charge protector pass through respectively Charging port is connected to external charger, and charging failure switching circuit is connected between charging port and charging control circuit; The Current Voltage value detected using detection circuit, is judged whether exception occur or fills full, abnormal feelings according to the Current Voltage value Condition include overcharge, over-discharge, overcurrent and charger voltage be not consistent with the normal voltage of multi-series lithium battery, there is exception or filling It in the case where full, goes control charging control circuit to disconnect by protection circuit and/or governor circuit, and continues to detect at this time The second current value that circuit is sent, judges whether charging control circuit fails according to whether the second electric current is greater than zero, when determination is filled When electric control circuit fails, charging failure switching circuit is enabled to disconnect, and then charging port and charging control circuit are disconnected;Together When, external device is sent instructions to, the present invention fails switching circuit when charging control circuit fails by charging, right in time It is turned off, and prevents the damage of the mos pipe of charging control circuit, and causes the security faults such as battery catches fire, explosion, simply Reliably, highly-safe, and user is notified by telecommunication circuit, allow user to understand abnormal conditions in time, remove charging equipment and Make corresponding processing.
Detailed description of the invention
Fig. 1 is the first block diagram of the invention;
Fig. 2 is the second block diagram of the invention;
Fig. 3 is the circuit diagram of main control unit of the invention;
Fig. 4 is the circuit diagram of charging failure switch unit of the invention;
Fig. 5 is third block diagram of the invention;
Fig. 6 is fourth block figure of the invention;
Fig. 7 is flow chart of the invention.
Main element symbol description is as follows:
1, charging port 2, multi-series lithium battery group
3, charging control circuit 4, governor circuit
5, current detection circuit 6, overcharge failure switching circuit
7, telecommunication circuit 8, protection circuit
9, electric discharge failure switching circuit 10, charge/discharge control circuit
11, electric discharge port.
Specific embodiment
In order to more clearly state the present invention, the present invention is further described with reference to the accompanying drawing.
Please refer to Fig. 1 and Fig. 2, a kind of control system of multi-series lithium battery group shielding failure of the invention, including charging end Mouth 1, multi-series lithium battery group 2, charging control circuit 3, governor circuit 4, charging detecting circuit 5, protection circuit 8, charging failure are opened Powered-down road 6 and telecommunication circuit 7, charging port 1 can connect charger, and multi-series lithium battery group 2 is connect with charging control circuit 3, Multi-series lithium battery group 2 and charging control circuit 3 couple, and protection circuit 8 is connect with charging control circuit 3, detection circuit 5 and protection Circuit 8, governor circuit 4 connect, and detection circuit 5 and charging control circuit 3 are connected to external charging by charging port 1 respectively Device, the failure switching circuit 6 that charges are connected between charging port 1 and charging control circuit 3, charging failure switching circuit 6 and master It controls circuit 4 to connect, governor circuit 4 is also connect with telecommunication circuit 7;Detection circuit 5 detects voltage and or current value, protection electricity Road 8 and/or governor circuit 4 according to the voltage and or current value judge whether to occur exception or fill it is full, when be judged as occur it is abnormal Or when filling full, disconnected by protection circuit 8 and/or the control control charging control circuit 3 of governor circuit 4, at this point, governor circuit 4 The current value of the detection of detection circuit 5 is continued to, if current value is greater than zero at this time, judges that charging control circuit fails, it is main The control control charging failure switching circuit 6 of circuit 4 separates charging control circuit 3 and charging port 1 and is issued by telecommunication circuit 7 Indicate external device, the present invention judges that abnormal conditions, abnormal conditions include the electricity overcharged with charger by voltage and current value Pressure is not consistent with the normal voltage of multi-series lithium battery, when occurring abnormal, disconnects charge protector 3 in time, and continue to test Electric current judges whether charging control circuit 3 fails according to the electric current, when charging control circuit 3 fails, carries out in time to it It disconnects, prevents the damage of charging mos pipe, and cause the security faults such as battery catches fire, explosion, it is simple and reliable, it is highly-safe, and User is notified by telecommunication circuit, user is allowed to understand shielding failure in time, removes charging equipment and makes corresponding processing.
In the present embodiment ,-Fig. 4, governor circuit 4 include the model of controller and driving circuit controller refering to fig. 1 STM8SS003P6, detection circuit 5 are connect with governor circuit 4, and controller is sequentially connected with driving circuit, charging control circuit 3, In Fig. 2, controller U5, driving circuit includes QU1 and QU2, and controller U5 passes through pin C-EN and charging control circuit 3, Connection, controller U5 are connect by pin S with the collector of protection protection QU3, and controller is also connect with failure switching circuit 6; X in Fig. 4 is charging port 1, and detection circuit 5 includes voltage detecting circuit 52, and voltage detecting circuit 52 is coupled in charging end Between mouth 1 and charging control circuit 3, and it is connect with governor circuit 4, voltage detecting circuit 52 detects the voltage of charger access, And voltage value is fed back into governor circuit 4, the voltage judgement intervention that governor circuit 4 is detected according to charger detection circuit 51 is filled Whether the voltage of electric appliance meets the rechargeable standard voltage of multi-series lithium battery group, if not the rechargeable standard electricity of multi-series lithium battery group Pressure, governor circuit 4 control charging control circuit 3 and disconnect, and realize charger identification protecting, fill at this point, detection circuit continues to test The size of current of electric control circuit 3 is judged as that charging control circuit 3 fails, governor circuit if current value is greater than zero at this time 4 control charging failure switching circuits 6 are closed, and then charging control circuit 3 and charging port 1 are disconnected, and realize fail safe, and External device is sent to by telecommunication circuit 7 simultaneously, notifies user.
In the present embodiment, it refering to Fig. 5-Fig. 6, further illustrates, charging failure switch unit specifically includes triode QY1 With relay K3, the base stage of triode QY1 and the JDQ pin of controller are connected, emitter ground connection, collector connection relay K3, the switch of relay K3 are connected between charging control unit 3 and charging port 1, and charging control unit is normally to fill Electric control circuit, as shown in fig. 6, including mos pipe QC4 and QC3, when controller is greater than by received second electric current of pin C-i When zero, high level is exported by pin JDQ, so that relay K3 is disconnected, so that charging control unit 3 and charging port 1 disconnect, Realize protection.
In the present embodiment, it overcharges to judge whether to occur and is judged when overcharging, 52 He of voltage detecting circuit Between detection circuit 51 and multi-series lithium battery group 2 and charging control circuit 3, voltage detecting circuit 52 and current detection circuit 51 are also It is connect with governor circuit 4 and protection circuit 8, circuit 8 and governor circuit 4 is protected to receive voltage detecting circuit 52 and current detecting electricity The charging voltage and charging current that road 53 is detected, protection circuit 8 judge whether to overcharge according to charging voltage, governor circuit 4 Judge whether to fill according to charging voltage and charging current it is full, when judgement overcharges, protection circuit 8 control charging control circuit 3 disconnect;When judgement occurs filling full, governor circuit 4 can also control the disconnection of charging control circuit 3, and detection circuit is after continued access at this time The current value of charging control circuit is received, governor circuit 4 judges whether charging control circuit 3 fails according to current value at this time, when It is that charging control circuit 3 fails that current value, which is greater than zero, and the control charging failure switching circuit 6 of governor circuit 4 is closed, and then will be filled Electric control circuit 3 and charging port 1 disconnect, and realize fail safe, and are sent to external device by telecommunication circuit 7 simultaneously, lead to Know user.
In the present embodiment example, refering to Fig. 4-Fig. 6, it can be also used for the abnormal Failure Control of electric discharge, specifically further include putting Electricity failure switching circuit 9 and sequentially connected electric discharge port 10, charge/discharge control circuit 11, discharge control switch 9 and governor circuit 4 Connection, charge/discharge control circuit 11 are connect with governor circuit 4, protection circuit 8, and detection circuit 6 is also connect with charge/discharge control circuit 11, It should be understood that detection circuit 6 includes electric current detection circuit 51 and voltage detecting circuit 52 for judging whether there is The case where putting, and for when judging over-discharge, whether over-discharge control circuit 11 to fail, and corresponding control and notice are carried out, specifically Control mode it is similar to the case where overcharging, be not repeated here here.
It in the present embodiment, further include voice broadcast circuit 12, voice broadcast circuit 12 includes speech chip and player, The input terminal of speech chip is connect with governor circuit 4, and the output end of speech chip is connect with player, when governor circuit 4 judges When charging control circuit 3 fails, governor circuit 4, which controls speech chip, enables player make a sound, and notifies user in time, enables user Experience sense it is more preferable.
The control system of shielding failure based on above multi-series lithium battery group, the invention also discloses multi-series lithium battery groups Shielding failure control method, refering to Fig. 7, comprising the following steps:
S1: governor circuit and/or protection circuit obtain the voltage and or current value that circuit detects, according to voltage and or current Value judges whether exception or fills full;
S2: when judgement exception occurs or fills full, governor circuit or protection circuit control charging control circuit are disconnected, at this point, inspection Slowdown monitoring circuit continues to test the second current value of charging control circuit, if the second current value is zero, charging control circuit is positive Often;If the second current value is greater than zero, determine that charging control circuit fails;
S3: governor circuit exports disablement signal enables charging failure switching circuit disconnect to charging failure switching circuit, and then will fill Electric port and charging control circuit disconnect;Meanwhile governor circuit sends instructions to external device by telecommunication circuit.
When judging extremely for a variety of situations, for example judging whether the charger of access is suitable, step S1 includes: governor circuit The first voltage value for the charger that 4 acquisition voltage detecting circuits 51 detect judges whether to meet more strings according to the first voltage value The rechargeable standard of lithium battery group 2, and when voltage value does not meet the rechargeable standard of multi-series lithium battery group 2, it is judged as that appearance is abnormal, Then, governor circuit 4 controls charging control circuit 3 and disconnects, at this point, detection circuit 5 continues to test the second of charging control circuit 3 Current value, if the second current value is zero, charging control circuit 3 is normal;If the second current value is greater than zero, charging control is determined Circuit 3 processed fails;Governor circuit 4 exports disablement signal to charging failure switching circuit 6, and charging failure switching circuit 6 is enabled to disconnect, And then charging port 1 and charging control circuit 3 are disconnected;Meanwhile governor circuit 4 sends instructions to the external world by telecommunication circuit 7 Equipment enables user know;
And when judging whether to overcharge or fill full, wherein step S1 further include: governor circuit 4 and/or protection circuit 6 obtain voltage With the voltage value and current value of the charge circuit of current detection circuit detection, voltage value and current value at this time is defined as the second electricity Pressure value and third current value, judge whether to overcharge according to the second voltage value of charge circuit and third current value, when overcharging When abnormal, the protection control control charging control circuit 3 of circuit 6 is disconnected, at this point, detection circuit 5 continues to test charging control circuit 3 The second current value, if the second current value is zero, charging control circuit 3 is normal;If the second current value is greater than zero, determine Charging control circuit 3 fails;Governor circuit 4 exports disablement signal to charging failure switching circuit 6, enables charging failure switching circuit 6 disconnect, and then charging port 1 and charging control circuit 3 are disconnected;Meanwhile governor circuit 4 sends instruction by telecommunication circuit 7 To external device, user is enabled to know;Governor circuit 4 judge whether to fill also according to second voltage value it is full, when be judged as occur filling it is full When, charging control circuit 3 can be controlled by governor circuit 4 and disconnected, at this point, detection circuit 5 continues to test charging control circuit 3 The second current value, if the second current value is zero, charging control circuit 3 is normal;If the second current value is greater than zero, determine Charging control circuit 3 fails;Governor circuit 4 exports disablement signal to charging failure switching circuit 6, enables charging failure switching circuit 6 disconnect, and then charging port 1 and charging control circuit 3 are disconnected;Meanwhile governor circuit 4 sends instruction by telecommunication circuit 7 To external device, user is enabled to know, realize protection and notifies user in time.
It in the present embodiment, further include being controlled in the case of over-discharge, whether charge/discharge control circuit 11 is abnormal, specifically Ground, protection circuit 8 obtains the voltage value and current value for the charge/discharge control circuit 11 that detection circuit 5 detects, by voltage at this time Value and current value are defined as tertiary voltage and the 4th current value, judge whether over-discharge according to tertiary voltage and the 4th current value, when When judgement is in over-discharge state, it is judged as that appearance is abnormal, protection circuit 8 controls charge/discharge control circuit 11 and disconnects, and step at this time In S2, what detection circuit 5 continued to test is the second current value of charge/discharge control circuit 11, in order to be distinguish, by electricity at this time Flow valuve is defined as the 5th current value, when the 5th current value is greater than zero, is judged as that charge/discharge control circuit 11 fails, governor circuit 4 Control electric discharge failure switching circuit 9 disconnects, and charge/discharge control circuit 11 and electric discharge 10 port of port fail to charge/discharge control circuit Protection;It in step s3, can be with verbal announcement user, comprising: send failure instruction and arrive speech chip;Speech chip according to Failure instruction judges that charging control circuit fails, and speech chip control is broadcast device and made a sound, and alarms.
Disclosed above is only one or several specific embodiments of the invention, but the present invention is not limited to this, is appointed What what those skilled in the art can think variation should all fall into protection scope of the present invention.

Claims (10)

1. a kind of control system of multi-series lithium battery group shielding failure, which is characterized in that including charging port, multi-series lithium battery Group, charging control circuit, governor circuit, detection circuit, protection circuit, charging failure switching circuit and telecommunication circuit, it is described to fill Electric port is connect with charging control circuit, and the multi-series lithium battery group and charging control circuit couple, the charge protector It is connect with charging control circuit, the detection circuit is connect with protection circuit, governor circuit, and the charging failure switching circuit connects It connects between the charging port and charging control circuit, the charging failure switching circuit is connect with governor circuit, the inspection It surveys unit also to connect with multi-series lithium battery group, charging control unit, the governor circuit is also connect with telecommunication circuit;
The detection circuit detects when voltage and or current value exception or fills full, passes through protection circuit and/or governor circuit control System control charging control circuit disconnects, at this point, governor circuit continues to the second electric current of detection circuit detection, if at this time the Two electric currents then judge that charging control circuit fails greater than zero, and governor circuit control failure switching circuit disconnects, and then described in partition Charging control circuit and charging port simultaneously issue instruction to external device by telecommunication circuit.
2. the control system of multi-series lithium battery group shielding failure according to claim 1, which is characterized in that the detection electricity Road includes voltage detecting circuit, and the anode of the voltage detecting circuit and multi-series lithium battery connects, and the voltage detecting circuit Also it is connect with the governor circuit, protection circuit and charging port.
3. the control system of multi-series lithium battery group shielding failure according to claim 1, which is characterized in that the detection electricity Road further includes current detection circuit, and the current detection circuit is connect with charging control unit, the current detection circuit also with The governor circuit, protection circuit connection.
4. the control system of multi-series lithium battery group shielding failure according to claim 1, which is characterized in that further include electric discharge Fail switching circuit and sequentially connected electric discharge port, charge/discharge control circuit and the failure switching circuit that discharges, the electric discharge failure Switching circuit is connect with governor circuit, and the charge/discharge control circuit and governor circuit, protection circuit connection, the detection circuit is also It is connect with charge/discharge control circuit.
5. a kind of control system of multi-series lithium battery group shielding failure according to claim 1, which is characterized in that further include Voice broadcast circuit, the voice broadcast circuit include speech chip and player, the input terminal of the speech chip with it is described Governor circuit connection, the output end of the speech chip is connect with player, when the governor circuit judges the charge control When circuit malfunction, the governor circuit control speech chip enables player make a sound.
6. a kind of control method of multi-series lithium battery group shielding failure characterized by comprising
The governor circuit and the/protection circuit obtain the voltage and or current value that detects of detection circuit, according to the electricity Pressure and/or current value judge whether exception or fill full;
When judgement exception occurs or fills full, the governor circuit or protection circuit control charging control circuit are disconnected, at this point, inspection Slowdown monitoring circuit continues to test the second current value of charging control circuit, if the second current value is zero, charging control circuit is positive Often;If the second current value is greater than zero, the charging control circuit failure is determined;
The governor circuit exports disablement signal to charging failure switching circuit, and charging failure switching circuit is enabled to disconnect, and then by The charging port and charging control circuit disconnect;Meanwhile the governor circuit sends instructions to the external world by telecommunication circuit and sets It is standby.
7. the control method of multi-series lithium battery group shielding failure according to claim 6, which is characterized in that the master control electricity Road obtains the voltage and or current value that detection circuit detects, judges whether to wrap in exception according to the voltage and or current value Include: the governor circuit obtains the first voltage value for the charger that voltage detecting circuit detects, according to the first voltage value Judge whether the rechargeable standard for meeting multi-series lithium battery group, and when the voltage value does not meet the rechargeable standard of multi-series lithium battery group When, it is judged as that appearance is abnormal.
8. the control method of multi-series lithium battery group shielding failure according to claim 6, which is characterized in that the master control electricity Road obtains the voltage and or current value that detection circuit detects, judges whether exception according to the voltage and or current value or fills It include: the second voltage value and third electric current of the protection circuit and governor circuit acquisition voltage and current detection circuit detection in full Value, the protection circuit judges whether to overcharge according to the two voltage and currents value, when overcharging, is judged as appearance It is abnormal;The governor circuit judge whether to fill according to the two voltage and currents value it is full, when occurring filling full, be judged as fill it is full.
9. the control method of multi-series lithium battery group shielding failure according to claim 6, which is characterized in that judge working as Now exception or when filling full before, further includes: the governor circuit and/or protection circuit obtain the electric discharge control that detection circuit detects The tertiary voltage of unit processed and the 4th current value judge whether over-discharge according to the tertiary voltage and the 4th current value, work as judgement When in over-discharge state, it is judged as that appearance is abnormal.
10. the control method of multi-series lithium battery group shielding failure according to claim 6, which is characterized in that it is described into And after the charging port and charging control circuit are disconnected, further includes: send failure instruction and arrive speech chip;Speech chip Judge that charging control circuit fails according to failure instruction, the speech chip control is broadcast device and made a sound, and alarms.
CN201910134630.0A 2019-02-23 2019-02-23 The control system and method for multi-series lithium battery group shielding failure CN109687558A (en)

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CN107834661A (en) * 2017-12-06 2018-03-23 深圳市超能威电子有限公司 A kind of multi-series lithium battery Protection control system and control circuit
CN108767927A (en) * 2018-06-27 2018-11-06 杭州极速电子有限公司 A kind of lithium battery management system

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