CN104377754A - Battery management system with field-effect tube temperature detection function - Google Patents
Battery management system with field-effect tube temperature detection function Download PDFInfo
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- CN104377754A CN104377754A CN201410505969.4A CN201410505969A CN104377754A CN 104377754 A CN104377754 A CN 104377754A CN 201410505969 A CN201410505969 A CN 201410505969A CN 104377754 A CN104377754 A CN 104377754A
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Abstract
The invention relates to a battery management system with a field-effect tube temperature detection function. The system solves the problems that in the prior art, a battery is damaged and catches a fire due to the fact that a power switch tube of a battery management system heats after being broken down, and the system takes no processing measures after protection failure. The system comprises a battery pack, a control switch module, a sampling resistor, a fuse, a fuse control switch, a power management module, a center processing module, a single voltage collecting port module, a single voltage collecting IC module and a temperature sensor. The battery management system has the advantages that the field-effect tube temperature detection function is achieved; the work state of a field-effect tube is judged according to temperature, the fuse can be blown in time during abnormal work conditions, and batteries are protected; a field-effect tube breakdown detection function is further achieved, voltage and current can be detected, the abnormal condition of the control switch module can be detected in time, the system has a warning module and can send out a warning in time, and the battery pack is prevented from continuing to be used when out of control and the batteries are protected.
Description
Technical field
The present invention relates to a kind of power management techniques, especially relate to a kind of battery management system with field effect transistor temperature detection.
Background technology
At present, electric motor car is generally applied in the life of people, along with the development in epoch, the utilization of lithium battery on electric bicycle is also more and more extensive, there is the situations such as excessive discharge and recharge or short circuit to prevent battery, electrokinetic cell is all provided with charge-discharge protection circuit usually, make power battery charging or be discharged to certain voltage threshold to stop charge or discharge later, thus ensure the safety of electrokinetic cell, but the protective circuit adopted at present, i.e. management system, the power switch pipe adopted in circuit is NMOS substantially, and NMOS tube is often easily breakdown when high voltage or big current, impedance can higher than under normal condition, continuing will constantly generate heat in the process used, and thermal resistance value is larger all the more, resistance is larger just hot all the more, the final battery pack that causes possibly is smoldered, the security incident such as to catch fire.Although although these batteries have related to battery realization protection in addition, further do not detected and process doing after shielding failure.
Summary of the invention
The present invention mainly solves the power switch pipe of battery management system in prior art because puncturing heating; the problem causing cell damage and catch fire; and the problem do not had handling it after shielding failure, provide a kind of problem can be detected in time and take measures to battery realize protection the battery management system with field effect transistor temperature detection.
Above-mentioned technical problem of the present invention is mainly solved by following technical proposals, a kind of have the battery management system that field effect transistor punctures detection, comprise by the battery pack of multiple serial battery, control switch module, sampling resistor, fuse, fuse control switch, battery anode is by inline fuse control switch, fuse, control switch module, battery electrode is connected to after sampling resistor, system also includes power management module, central processing module, monomer voltage acquisition interface module, monomer voltage gathers IC module, temperature sensor, described central processing module is connected respectively on the control end of control switch and the control end of fuse control switch, central processing module also has on the circuit that sampling circuit is connected between control switch and sampling resistor, described power management module is connected respectively in central processing module and monomer voltage acquisition interface module, described temperature sensor is arranged on control switch Modular surface, temperature sensor is connected with power management module and central processing module respectively, described monomer voltage acquisition interface module is connected with battery pack, and monomer voltage acquisition interface module and monomer voltage gather IC model calling, monomer voltage gathers IC module and is connected with CPU.In the present invention, cell voltage collection IC module is gathered batteries monomer battery voltage data by monomer voltage acquisition interface module; sampling circuit gathers loop current; whether central processing module overcharges according to these Data Detection cells, mistake is put; battery pack whether overcurrent; central processing module controls the opening and closing of control switch module according to situation about detecting simultaneously, carries out charge protection and discharge prevention to team's battery pack.Power management module is for meeting the demand of different operating voltage in system.Central processing module controls the work of fuse control switch, and temperature sensor is close to two metal-oxide-semiconductors of control switch module on the surface, and the temperature signal detected is transferred to central processing module.When central processing module detects that control switch module temperature exceedes set point, think that control switch module exists abnormal, then central processing module controls fuse control switch and opens the loop fuse that fuses, and stops battery pack work, avoids dangerous generation.Control control switch module at central processing module in addition to disconnect, after quitting work, central processing module continues to detect that batteries monomer voltage raises or declines, then think control switch Module Fail, but do not generate heat, central processing module controls fuse control switch and opens, fuse in fusing loop, make battery pack physical break performance loop, avoid battery pack to work on, initiation potential.The protections such as the present invention can not only overcharge battery pack, mistake is put, short circuit, overcurrent, and by detecting control switch module temperature, fuse being fused, protects battery further.
As a kind of preferred version, described control switch module comprises the metal-oxide-semiconductor Q1 of control of discharge, the metal-oxide-semiconductor Q2 that charging controls, diode D1, diode D2, the grid of metal-oxide-semiconductor Q1 and the grid of metal-oxide-semiconductor Q2 are connected on central processing module respectively, the drain electrode of metal-oxide-semiconductor Q1 is connected to the drain electrode of metal-oxide-semiconductor Q2, the source electrode of metal-oxide-semiconductor Q1 is connected with sampling resistor, the source electrode of metal-oxide-semiconductor Q2 is connected with fuse, diode D1 positive pole connects metal-oxide-semiconductor Q1 source electrode, diode D1 negative pole connects metal-oxide-semiconductor Q1 drain electrode, diode D2 positive pole connects metal-oxide-semiconductor Q2 source electrode, diode D2 negative pole connects metal-oxide-semiconductor Q2 drain electrode.Control switch module carries out charge protection and discharge prevention to battery pack; when central processing module detects that battery pack has monomer voltage to overcharge; the metal-oxide-semiconductor Q2 controlling charging control closes; disconnect charging circuit; charge protection is carried out to battery pack; if now central processing module has still detected charging current by voltage comparison module, then think that metal-oxide-semiconductor Q2 is breakdown, reported to the police.Detect that battery pack has monomer voltage to cross to put at central processing module, battery pack overcurrent, battery pack always just with total negative short circuit time; the metal-oxide-semiconductor Q1 that controlled discharge controls closes; disconnect discharge circuit; discharge prevention is carried out to battery pack; if now central processing module has still detected discharging current by adopting circuit; then think that metal-oxide-semiconductor Q1 is breakdown, report to the police.
As a kind of preferred version, monomer voltage acquisition interface module includes some positive terminal and negative terminal, these positive terminal are connected respectively on the positive pole of batteries monomer battery, negative terminal is connected to the negative pole of battery pack, monomer voltage gathers IC module and has some detection interfaces, detects interface difference correspondence and is connected with positive terminal, negative terminal.Monomer voltage acquisition interface module detects each monomer battery voltage of battery pack respectively, gathers IC module to gather voltage data and be then sent to central processing module by monomer voltage.
As a kind of preferred version, system also includes alarm module, voltage comparison module, described alarm module is connected with central processing module with power management module respectively, and voltage comparison module is attempted by sampling resistor, and the signal output part of voltage comparison module is connected to central processing module.System also has the detection that control switch module punctures inefficacy, and can be reported to the police by alarm module in the event of a failure, and user's Timeliness coverage is keeped in repair in time.Voltage comparator is used for comparing sampling resistor both end voltage, according to comparable situation, central processing module judges that whether control switch module is breakdown, and control alarm module and report to the police after judgement punctures, reminding user needs on-call maintenance, prevent battery pack from continuing to use when out of control, cause the generation of keeping in repair.
As a kind of preferred version, system also comprises described alarm module and comprises loud speaker, triode Q3, light-emitting diode D3, resistance R1, resistance R2, described loud speaker positive pole connects positive source, loud speaker negative pole connecting triode Q3 collector electrode, triode Q3 grounded emitter, triode Q3 base stage is by being connected on central processing module after contact resistance R1, resistance R2 one end is connected on loud speaker positive pole, resistance R2 other end connecting luminous diode D3 positive pole, light-emitting diode D3 negative pole connects loud speaker negative pole.Alarm module controls by central processing module, when central processing module detects that control switch module is breakdown, sends a signal to triode Q3 base stage, makes triode Q3 conducting, loud speaker and light-emitting diode D3 all switched on, carry out sound and light alarm.
Therefore, advantage of the present invention is: have field effect transistor temperature detecting function, field effect transistor operating state is judged according to temperature, can fuse wire in time in operation irregularity situation, battery is protected, also there is field effect transistor in addition and puncture measuring ability, by to measure voltage & current, can Timeliness coverage control switch module abnormal conditions, and there is alarm module can report to the police in time, reminding user needs on-call maintenance, prevent battery pack from continuing to use when out of control, cause the generation of keeping in repair, but also further conservation treatment can be carried out to control switch Module Fail, protect battery.
Accompanying drawing explanation
Accompanying drawing 1 is a kind of circuit structure frame diagram of the present invention;
Accompanying drawing 2 is a kind of electrical block diagrams of alarm module in the present invention.
1-battery pack 2-monomer voltage acquisition interface module 3-monomer voltage gathers IC module 4-power management module 5-alarm module 6-central processing module 7-fuse control switch 8-control switch module 9-voltage comparison module 10-sampling resistor 11-fuse 12-loud speaker 13-temperature sensor.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, technical scheme of the present invention is described in further detail.
Embodiment:
The present embodiment is a kind of has the battery management system that field effect transistor punctures detection, as shown in Figure 1, battery pack 1, control switch module 8, sampling resistor 10, fuse 11, fuse control switch 7, voltage comparison module 9, monomer voltage acquisition interface module 2, monomer voltage collection IC module 3, power management module 4, alarm module 5, central processing module 6, fuse 11, fuse control switch 7, temperature sensor 13 is comprised.Battery pack is in series by multiple cell, and battery anode, by being connected to battery electrode after inline fuse control switch, fuse, control switch module, sampling resistor, forms a loop like this.
Monomer power supply gathers interface module 2 and comprises some positive terminal and a negative terminal, and positive terminal is connected respectively on the positive pole of each cell in battery pack, and negative terminal is connected to the negative pole of battery pack.Monomer voltage acquisition interface module and monomer voltage gather IC module 3 and are connected, monomer voltage gathers IC module by signal output and is connected on central processing module 6, power management module has two ports and is connected respectively to monomer voltage and gathers in IC module in addition, gather IC module by monomer voltage to be connected with total negative pole with total positive pole of battery pack respectively, power management module also respectively with temperature sensor 13, alarm module 5, central processing module 6 connects, temperature sensor and alarm module are connected respectively on central processing module, and temperature sensor is arranged on the surface of control switch module.Central processing module is connected respectively on the control end of control switch and the control end of fuse control switch, and central processing module also has sampling circuit, and sampling circuit is connected on the circuit between control switch and sampling resistor.
System also has field effect transistor and punctures measuring ability, system also includes voltage comparison module 9, voltage comparison module 9 has two inputs, be connected to sampling resistor two ends, voltage comparison module is connected in parallel on sampling resistor, and voltage comparator module output is connected on central processing module.
As shown in Figure 1, control switch module 8 comprises the metal-oxide-semiconductor Q1 of control of discharge, the metal-oxide-semiconductor Q2 that charging controls, diode D1, diode D2, the grid of metal-oxide-semiconductor Q1 and the grid of metal-oxide-semiconductor Q2 are connected on central processing module 6 respectively, the drain electrode of metal-oxide-semiconductor Q1 is connected to the drain electrode of metal-oxide-semiconductor Q2, the source electrode of metal-oxide-semiconductor Q1 is connected with sampling resistor 10, the source electrode of metal-oxide-semiconductor Q2 is connected with fuse one end, diode D1 positive pole connects metal-oxide-semiconductor Q1 source electrode, diode D1 negative pole connects metal-oxide-semiconductor Q1 drain electrode, diode D2 positive pole connects metal-oxide-semiconductor Q2 source electrode, diode D2 negative pole connects metal-oxide-semiconductor Q2 drain electrode.
As shown in Figure 2, alarm module 5 comprises loud speaker 12, triode Q3, light-emitting diode D3, resistance R1, resistance R2, described loud speaker positive pole connects positive source, loud speaker negative pole connecting triode Q3 collector electrode, triode Q3 grounded emitter, triode Q3 base stage is by being connected on central processing module after contact resistance R1, and resistance R2 one end is connected on loud speaker positive pole, resistance R2 other end connecting luminous diode D3 positive pole, light-emitting diode D3 negative pole connects loud speaker negative pole.
The present embodiment CS central processing module gathers the electric current and voltage situation of IC module, monomer voltage acquisition interface module detection batteries monomer by monomer voltage; if when detecting that battery pack has monomer voltage to overcharge; then control metal-oxide-semiconductor Q2 to close, realize charge protection.If detect, battery pack has monomer voltage to cross to put, battery pack overcurrent, battery pack always just with total negative short circuit, then control metal-oxide-semiconductor Q1 and close, disconnect discharge circuit, discharge prevention is carried out to battery pack.Achieve like this battery pack over-charge protective, Cross prevention.
System has field effect transistor and punctures detection and protection.If central processing module has controlled metal-oxide-semiconductor Q2 and has closed in charging process, if now central processing module has still detected charging current by voltage comparison module, then think that metal-oxide-semiconductor Q2 is breakdown, central processing module sends information to alarm module, and alarm module is reported to the police.If central processing module has controlled metal-oxide-semiconductor Q1 and has closed in discharge process, if now central processing module has still detected discharging current by adopting circuit, then think that metal-oxide-semiconductor Q1 is breakdown, central processing module sends information to alarm module, and alarm module is reported to the police.
System has temperature detecting function, the temperature of temperature sensor detection control switch module two metal-oxide-semiconductor, when central processing module detects that metal-oxide-semiconductor temperature exceedes set point, think that metal-oxide-semiconductor exists abnormal, then central processing module controls fuse control switch and opens the loop fuse that fuses, stop battery pack work, avoid dangerous generation.Control control switch module at central processing module in addition to disconnect, after quitting work, central processing module continues to detect that batteries monomer voltage raises or declines, then think control switch Module Fail, but do not generate heat, central processing module controls fuse control switch and opens, fuse in fusing loop, make battery pack physical break performance loop, avoid battery pack to work on, initiation potential.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various amendment or supplement or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present invention or surmount the scope that appended claims defines.
Although more employ the terms such as battery pack, monomer voltage acquisition interface module, monomer voltage collection IC module, power management module herein, do not get rid of the possibility using other term.These terms are used to be only used to describe and explain essence of the present invention more easily; The restriction that they are construed to any one additional is all contrary with spirit of the present invention.
Claims (5)
1. one kind has the battery management system of field effect transistor temperature detection, it is characterized in that: comprise by the battery pack of multiple serial battery (1), control switch module (8), sampling resistor (10), fuse (11), fuse control switch (7), battery anode is by inline fuse control switch, fuse, control switch module, battery electrode is connected to after sampling resistor, system also includes power management module (4), central processing module (6), monomer voltage acquisition interface module (2), monomer voltage gathers IC module (3), temperature sensor (13), described central processing module is connected respectively on the control end of control switch and the control end of fuse control switch, central processing module also has on the circuit that sampling circuit is connected between control switch and sampling resistor, described power management module is connected respectively in central processing module and monomer voltage acquisition interface module, described temperature sensor is arranged on control switch Modular surface, temperature sensor is connected with power management module and central processing module respectively, described monomer voltage acquisition interface module is connected with battery pack, and monomer voltage acquisition interface module and monomer voltage gather IC model calling, monomer voltage gathers IC module and is connected with CPU.
2. a kind of battery management system with field effect transistor temperature detection according to claim 1, it is characterized in that described control switch module (8) comprises the metal-oxide-semiconductor Q1 of control of discharge, the metal-oxide-semiconductor Q2 that charging controls, diode D1, diode D2, the grid of metal-oxide-semiconductor Q1 and the grid of metal-oxide-semiconductor Q2 are connected on central processing module (6) respectively, the drain electrode of metal-oxide-semiconductor Q1 is connected to the drain electrode of metal-oxide-semiconductor Q2, the source electrode of metal-oxide-semiconductor Q1 is connected with sampling resistor (10), the source electrode of metal-oxide-semiconductor Q2 is connected with fuse (11), diode D1 positive pole connects metal-oxide-semiconductor Q1 source electrode, diode D1 negative pole connects metal-oxide-semiconductor Q1 drain electrode, diode D2 positive pole connects metal-oxide-semiconductor Q2 source electrode, diode D2 negative pole connects metal-oxide-semiconductor Q2 drain electrode.
3. a kind of battery management system with field effect transistor temperature detection according to claim 1, it is characterized in that monomer voltage acquisition interface module (2) includes some positive terminal and negative terminal, these positive terminal are connected respectively on the positive pole of battery pack (1) cell, negative terminal is connected to the negative pole of battery pack, monomer voltage gathers IC module and has some detection interfaces, detects interface difference correspondence and is connected with positive terminal, negative terminal.
4. a kind of battery management system with field effect transistor temperature detection according to claim 1 or 2 or 3, it is characterized in that also including alarm module (5), voltage comparison module (9), described alarm module is connected with central processing module (6) with power management module (4) respectively, voltage comparison module is attempted by sampling resistor (10), and the signal output part of voltage comparison module is connected to central processing module (6).
5. a kind of battery management system with field effect transistor temperature detection according to claim 4, it is characterized in that also comprising described alarm module (5) comprises loud speaker (12), triode Q3, light-emitting diode D3, resistance R1, resistance R2, described loud speaker positive pole connects positive source, loud speaker negative pole connecting triode Q3 collector electrode, triode Q3 grounded emitter, triode Q3 base stage is by being connected on central processing module after contact resistance R1, resistance R2 one end is connected on loud speaker positive pole, resistance R2 other end connecting luminous diode D3 positive pole, light-emitting diode D3 negative pole connects loud speaker negative pole.
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| CN201410505969.4A CN104377754A (en) | 2014-09-28 | 2014-09-28 | Battery management system with field-effect tube temperature detection function |
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| CN104779669A (en) * | 2015-04-13 | 2015-07-15 | 深圳市格瑞普电池有限公司 | Lithium ion battery pack provided with charging protection circuit |
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| CN113689608A (en) * | 2021-08-24 | 2021-11-23 | 深圳华强技术有限公司 | Electric bicycle management system based on double-frequency |
| CN116311595A (en) * | 2023-05-16 | 2023-06-23 | 江西五十铃汽车有限公司 | Vehicle MOS tube supervision method, device, medium and program product |
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| CN113689608A (en) * | 2021-08-24 | 2021-11-23 | 深圳华强技术有限公司 | Electric bicycle management system based on double-frequency |
| CN116311595A (en) * | 2023-05-16 | 2023-06-23 | 江西五十铃汽车有限公司 | Vehicle MOS tube supervision method, device, medium and program product |
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Application publication date: 20150225 |