CN105449312B - A kind of heating control circuit for lithium ion battery - Google Patents
A kind of heating control circuit for lithium ion battery Download PDFInfo
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- CN105449312B CN105449312B CN201510673868.2A CN201510673868A CN105449312B CN 105449312 B CN105449312 B CN 105449312B CN 201510673868 A CN201510673868 A CN 201510673868A CN 105449312 B CN105449312 B CN 105449312B
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- voltage comparator
- ion battery
- lithium ion
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention discloses a kind of heating control circuits for lithium ion battery, including power supply, voltage comparator, temperature collection circuit, low pass RC filter circuit, P-channel metal-oxide-semiconductor, N-channel MOS pipe, detection resistance R0 and heater；Wherein, the power supply gives temperature collection circuit and voltage comparator to power respectively, the output signal of temperature collection circuit is input to the input port of voltage comparator, the input port of voltage comparator is input to after low pass RC filter circuit by the detection signal of detection resistance, the output signal control P-channel metal-oxide-semiconductor work of voltage comparator, the output signal control N-channel MOS pipe work of P-channel metal-oxide-semiconductor, the output signal control heater work of N-channel MOS pipe.The present invention has the advantages that structure is simple, reliable and stable, low-power consumption, does not need the intervention of BMS system or protection board, circuit can work independently dedicated for the charging heating of chemical cell.
Description
Technical field
The present invention relates to a kind of heating control circuit, in particular to a kind of heating control circuit for lithium ion battery.
Background technique
Lithium ion battery is a kind of electrochmical power source, is limited by the law of thermodynamics, extremely sensitive to temperature, in ultra-low temperature surroundings
The specific energy of middle battery sharply declines, while effectively operating voltage can also decline, and seriously affect use.Especially lithium ion battery
It charges at low temperature, it is easy to cause cathode graphite to analyse lithium, the lithium metal of precipitation is reacted with electrolyte, the SEI film of graphite is destroyed,
Cause battery capacity that the adverse consequences such as irreversible decaying, exhaust, internal resistance raising occur.Under serious conditions, partial short-circuit will lead to,
Diaphragm is even pierced through, direct short-circuit battery brings fire hazard.
In actual experimentation, have been found that battery is able to maintain a higher temperature in charging, then
Discharge performance under low temperature will be greatly improved, and in brief, guarantee that battery charges under reasonable temperature, so that it may
It is worked normally under lower temperature.
Battery includes lithium ion battery, lead-acid battery, and nickel-metal hydride battery especially has low temperature ring in actual use
In the case of used in border, additional heater circuit is required, to improve battery temperature when charging.Current heater circuit
Only simply the electric energy of battery is connected on heating sheet, there are many hidden danger.It is in particular in:
1, heater circuit volume is larger, reduces the energy density of battery.
2, heater circuit itself, which consumes electric current, leads to battery report in the long-term storage process it is possible that battery electricity is given out light
It is useless.
3, heating power is inflexible, and sometimes heating power can be more than charge power, especially in photovoltaic energy storage field,
Charge power is unstable, it is possible to winter battery be caused to have no idea to be charged to enough electricity.
Summary of the invention
Goal of the invention: for overcome the deficiencies in the prior art, the present invention provides it is a kind of can be according to temperature and battery
The heating control circuit for lithium ion battery of charging and discharging state auto controlled heater work.
Technical solution: the present invention provides a kind of heating control circuits for lithium ion battery, including power supply, voltage ratio
Compared with device, temperature collection circuit, voltage comparator, low pass RC filter circuit, P-channel metal-oxide-semiconductor, N-channel MOS pipe, detection resistance R0
And heater；Wherein, the power supply gives temperature collection circuit and voltage comparator to power respectively, the output letter of temperature collection circuit
It number is input to the input port of voltage comparator, electricity is input to after low pass RC filter circuit by the detection signal of detection resistance
Press the input port of comparator, the output signal control P-channel metal-oxide-semiconductor work of voltage comparator, the output letter of P-channel metal-oxide-semiconductor
Number control N-channel MOS pipe work, N-channel MOS pipe output signal control heater work.
Further, the temperature collection circuit includes the 1st resistance R1, the 2nd resistance R2, the 3rd resistance R3 and negative temperature coefficient
Thermal resistor NTC, wherein the power supply is connect with one end of the 1st resistance R1 and the 2nd resistance R2 respectively, the 1st resistance R1
The other end connect respectively with one end of the input terminal of voltage comparator and negative temperature coefficient thermistor NTC, negative temperature system
The other end of number thermal resistor NTC is connect with the ground terminal of one end of detection resistance R0, voltage comparator respectively, and the described 2nd
The other end of resistance R2 is connect with one end of one end of the 4th resistance R4 and the 3rd resistance R3 respectively, the other end point of the 3rd resistance R3
It is not connect with the other end of the input terminal of voltage comparator and detection resistance R0；The other end of 4th resistance R4 respectively with voltage ratio
Compared with device input terminal and the 5th resistance R5 one end connection, the other end of the 5th resistance R5 respectively with the output end of voltage comparator and
The grid of P-channel metal-oxide-semiconductor connects.
Further, the low pass RC filter circuit includes the 6th resistance R6, the 7th resistance R7, diode D1 and capacitor C1,
One end of the 6th resistance R6 is connect with the input terminal of the voltage comparator, the other end of the 6th resistance R6 respectively with
The cathode of diode, one end of capacitor C1 are connected with one end of the 7th resistance R7, the anode of diode respectively with the 8th resistance R8
One end, capacitor C1 the other end and the 7th resistance R7 the other end connection, the anode of diode, the 8th resistance R8 one end,
The other end of the other end of capacitor C1 and the 7th resistance R7 are connect with the cathode of lithium ion battery, and the 8th resistance R8's is another
End is connect with the ground terminal of voltage comparator.Current detection signal just reaches amplifier by low pass RC filtering, makes battery low current
It is worked when charging in the concussion state of a ultralow frequency, improves reliability, and avoiding heated current is more than charging current.
Further, the voltage comparator is low-power consumption twin voltage comparator.
Further, the resistance value of the detection resistance R0 is 3k Ω.
Further, the power supply is the voltage that lithium ion battery is generated through low pressure difference linear voltage regulator.
Working principle: the condition that the present invention uses two signals to open as heater will reach certain temperature grade
And electric current must be on fixed-direction, so that it is guaranteed that only just working in low temperature and charged state lower heater.Therefore this hair
It is bright to increase a small resistance on the resistance bridge of traditional bridge-type comparator circuit as a low reference voltage, this reference voltage
From power supply partial pressure, thus by the size of this voltage value as a judgment criteria of current direction；Temperature grade
Judgement is then to be realized by temperature collection circuit.Heater work is finally controlled according to two judging results.
The utility model has the advantages that compared with prior art, the present invention has structure letter dedicated for the charging heating of chemical cell
The advantages of single, reliable and stable, low-power consumption, the intervention of BMS system or protection board is not needed, circuit can work independently.
Detailed description of the invention
Fig. 1 is circuit diagram of the invention；
Fig. 2 is singly to go here and there protection board circuit diagram in embodiment 1；
Fig. 3 is insertion protection board circuit diagrams of going here and there in embodiment 2 more.
Specific embodiment
Further explanation is done to the present invention with reference to the accompanying drawing.
As shown in Figure 1, provided by the present invention for the heating control circuit of lithium ion battery, including power supply VCC, voltage ratio
Compared with device U1, temperature collection circuit, low pass RC filter circuit, P-channel metal-oxide-semiconductor, N-channel MOS pipe, detection resistance R0 and heater；
Wherein, power supply VCC is the stable voltage that lithium ion battery is generated through low pressure difference linear voltage regulator, and power supply VCC give temperature respectively
Acquisition Circuit and voltage comparator power supply.Voltage comparator is ADA4505-1 low-power consumption twin voltage comparator, i.e. voltage comparator
In include 8 pins, wherein pin 1 be first voltage comparator output end, pin 2 be first voltage comparator cathode
Input terminal, pin 3 are the electrode input end of first voltage comparator, and pin 4 is ground terminal, and pin 4 is second voltage comparator
Electrode input end, pin 6 be second voltage comparator negative input, pin 7 be second voltage comparator output end,
Pin 8 is power end.Temperature collection circuit includes the 1st resistance R1, the 2nd resistance R2, the 3rd resistance R3 and negative temperature coefficient thermistor power
Hinder device NTC, wherein power supply VCC is connect with one end of the 1st resistance R1 and the 2nd resistance R2 respectively, the other end point of the 1st resistance R1
It is not connect with one end of the pin of voltage comparator 2 and negative temperature coefficient thermistor NTC, negative temperature coefficient thermistor
The other end of NTC is connect with the pin 4 of one end of detection resistance R0, voltage comparator respectively, the other end difference of the 2nd resistance R2
It is connect with one end of one end of the 4th resistance R4 and the 3rd resistance R3, the other end of the 3rd resistance R3 draws with voltage comparator respectively
Foot 6 is connected with the other end of detection resistance R0；The other end of 4th resistance R4 is electric with the pin of voltage comparator 3 and the 5th respectively
One end connection of R5 is hindered, the other end of the 5th resistance R5 connects with the grid of the pin of voltage comparator 1 and P-channel metal-oxide-semiconductor respectively
It connects.Low pass RC filter circuit includes the 6th resistance R6, the 7th resistance R7, diode D1 and capacitor C1, one end of the 6th resistance R6
Connect with the pin 5 of voltage comparator, the other end of the 6th resistance R6 respectively with the cathode of diode, one end of capacitor C1 and
One end of seven resistance R7 connects, and the anode of diode is electric with one end of the 8th resistance R8, the other end of capacitor C1 and the 7th respectively
Hinder the other end connection of R7, the anode of diode, one end of the 8th resistance R8, the other end of capacitor C1 and the 7th resistance R7 it is another
One end is connect with the cathode of lithium ion battery, and the other end of the 8th resistance R8 and the pin 4 of voltage comparator connect.Voltage ratio
Pin 7 compared with device is connect with the drain electrode of P-channel metal-oxide-semiconductor, and the pin 8 of voltage comparator is connect with power supply VCC.P-channel metal-oxide-semiconductor
Source electrode is connect with the grid of N-channel MOS pipe, and the drain electrode of N-channel MOS pipe is connect with heater, and the source electrode of N-channel MOS pipe is in lithium
The cathode of ion battery connects, and the anode of lithium ion battery is connect with heater.P-channel metal-oxide-semiconductor and N-channel MOS pipe are all made of
The metal-oxide-semiconductor of high internal resistance ensures the reliable drop-down of system using the parasitic diode of MOS in this way.
Circuit structure provided by the invention is simple, high reliablity, and circuit power supply is using electric discharge metal-oxide-semiconductor driving in protection circuit
Power supply, accordingly even when battery stores for a long time, after protection circuit turns off electric discharge metal-oxide-semiconductor, heater circuit can also stop working completely,
Power consumption is 0, prevents the further overdischarge of battery.The area for occupying circuit board is minimum, will not substantially change lithium ion battery original
Some protection circuits, due to being equipped with current detecting unit, the specification of heating sheet is comparatively loose, has saved heating film customization
Expense.If introducing PWM unit, can accomplish to adapt to broader heating sheet specification.
Embodiment 1: as shown in Fig. 2, VCC is circuit power, R1, R2, NTC, R3 constitute a temperature collection circuit, detection
Resistance R0 is divided from VCC to obtain a reference voltage to sensed current signal, and wherein the resistance value of detection resistance R0 is
3kΩ.Under battery discharge status or the very small situation of charging current, circuit heating is not needed.When temperature is lower than setting value
When, the 1 output HIGH voltage signal of pin of voltage comparator；If have sufficiently large charging current at this time, voltage ratio
Pin 7 compared with device will export high level, so that heater is opened in N-channel MOS pipe Q2 conducting.Heating control circuit power supply is by list
It saves lithium battery itself to provide, and within protection board protection scope, battery failure will not be led to because of overdischarge.
Embodiment 2: as shown in figure 3, top half is that a 4 traditional string lithium ions protect circuit, lower half portion is this
The circuit part of invention, li-ion cell protection are realized by two metal-oxide-semiconductors shutdown of differential concatenation, one of them is responsible for putting
Electric switch off current, another is responsible for charging current turn-off, and MOS needs a constant voltage and is held on shape to drive
State.In order to further decrease power consumption, a low-power consumption LDO device is increased to heating control circuit, low-tension supply is provided, wherein
VCC is exactly to the stable voltage generated by linear voltage regulator, and entire circuit merely adds the power consumption of 50uA or so, Er Qie
Under battery discharge protection state, heating control circuit can lose power supply and stop working.Heater circuit is incorporated protection board
Protection scope effectively prevent the fortuitous events such as heater circuit out of control, mistake heating, open circuit.Greatly improve circuit reliability.
Claims (6)
1. a kind of heating control circuit for lithium ion battery, it is characterised in that: adopted including power supply, voltage comparator, temperature
Collector, low pass RC filter circuit, P-channel metal-oxide-semiconductor, N-channel MOS pipe, detection resistance R0 and heater；Wherein, the power supply
It powers respectively to temperature collection circuit and voltage comparator, the output signal of temperature collection circuit is input to the defeated of voltage comparator
Inbound port is input to the input port of voltage comparator by the detection signal of detection resistance after low pass RC filter circuit, electricity
Press the output signal control P-channel metal-oxide-semiconductor work of comparator, the output signal control N-channel MOS pipe work of P-channel metal-oxide-semiconductor, N
The output signal control heater work of channel MOS tube.
2. the heating control circuit according to claim 1 for lithium ion battery, it is characterised in that: the temperature acquisition
Circuit includes the 1st resistance R1, the 2nd resistance R2, the 3rd resistance R3 and negative temperature coefficient thermistor NTC, wherein the power supply
Connect respectively with one end of the 1st resistance R1 and the 2nd resistance R2, the other end of the 1st resistance R1 respectively with voltage comparator
Input terminal is connected with one end of negative temperature coefficient thermistor NTC, the other end difference of negative temperature coefficient thermistor NTC
Connect with the ground terminal of one end of detection resistance R0, voltage comparator, the other end of the 2nd resistance R2 respectively with the 4th resistance
One end of R4 is connected with one end of the 3rd resistance R3, the other end of the 3rd resistance R3 respectively with the input terminal of voltage comparator and detection
The other end of resistance R0 connects；The other end of 4th resistance R4 respectively with the input terminal of voltage comparator and the 5th resistance R5 one
End connection, the other end of the 5th resistance R5 are connect with the grid of the output end of voltage comparator and P-channel metal-oxide-semiconductor respectively.
3. the heating control circuit according to claim 1 for lithium ion battery, it is characterised in that: the low pass RC filter
Wave circuit includes the 6th resistance R6, the 7th resistance R7, diode D1 and capacitor C1, one end and the electricity of the 6th resistance R6
Press comparator input terminal connection, the other end of the 6th resistance R6 respectively with the cathode of diode, capacitor C1 one end and
One end of 7th resistance R7 connects, the anode of the diode other end and the 7th with one end of the 8th resistance R8, capacitor C1 respectively
The other end of resistance R7 connects, the anode of diode, one end of the 8th resistance R8, the other end of capacitor C1 and the 7th resistance R7
The other end is connect with the cathode of lithium ion battery, and the other end of the 8th resistance R8 and the ground terminal of voltage comparator connect.
4. the heating control circuit according to claim 1 for lithium ion battery, it is characterised in that: the voltage compares
Device is twin voltage comparator.
5. the heating control circuit according to claim 1 for lithium ion battery, it is characterised in that: the detection resistance
The resistance value of R0 is 3k Ω.
6. the heating control circuit according to claim 1 for lithium ion battery, it is characterised in that: the power supply is lithium
The voltage that ion battery is generated through low pressure difference linear voltage regulator.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510673868.2A CN105449312B (en) | 2015-10-13 | 2015-10-13 | A kind of heating control circuit for lithium ion battery |
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| CN201510673868.2A CN105449312B (en) | 2015-10-13 | 2015-10-13 | A kind of heating control circuit for lithium ion battery |
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| CN105449312A CN105449312A (en) | 2016-03-30 |
| CN105449312B true CN105449312B (en) | 2019-05-14 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106025440A (en) * | 2016-05-26 | 2016-10-12 | 维沃移动通信有限公司 | Heating control circuit, control method and mobile terminal |
| CN106941202B (en) * | 2017-04-12 | 2023-05-30 | 安徽朗越能源股份有限公司 | Low-temperature protection device and low-temperature protection method for light-operated lithium battery pack |
| CN112346501A (en) * | 2019-08-07 | 2021-02-09 | 触景无限科技（北京）有限公司 | Heating system for low-temperature starting of electronic equipment |
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| WO2010073523A1 (en) * | 2008-12-25 | 2010-07-01 | パナソニック株式会社 | Semiconductor integrated circuit |
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| CN103563162A (en) * | 2011-06-09 | 2014-02-05 | 罗伯特·博世有限公司 | Energy storage device with heating device and method for heating energy cells of an energy storage device |
| CN103390778A (en) * | 2012-05-08 | 2013-11-13 | 海洋王照明科技股份有限公司 | LED light fixture and lithium battery heating circuit thereof |
| CN103419666A (en) * | 2012-05-22 | 2013-12-04 | 比亚迪股份有限公司 | Electric car and electric car power system and battery heating method |
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Effective date of registration: 20190409 Address after: 225600 Dongting Lake Road Science and Technology Venture Center A2, Gaoyou Economic Development Zone, Yangzhou City, Jiangsu Province Applicant after: Huafu (Jiangsu) Lithium Electricity New Technology Co., Ltd. Applicant after: Jiangsu Huafu Storage New Technology Co., Ltd. Address before: 225600 Gaoyou Battery Industrial Park, Gaoyou Economic Development Zone, Yangzhou City, Jiangsu Province Applicant before: Jiangsu Huafu Storage New Technology Co., Ltd. |
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