CN103390778B - A kind of LED lamp and its lithium battery heater circuit - Google Patents
A kind of LED lamp and its lithium battery heater circuit Download PDFInfo
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- CN103390778B CN103390778B CN201210140131.0A CN201210140131A CN103390778B CN 103390778 B CN103390778 B CN 103390778B CN 201210140131 A CN201210140131 A CN 201210140131A CN 103390778 B CN103390778 B CN 103390778B
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- resistance
- lithium battery
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- switching tube
- constant pressure
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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 present invention is applied to illumination circuit field, more particularly to a kind of LED lamp and its lithium battery heater circuit.In embodiments of the present invention，Lithium battery temperature is constantly detected by NTC thermistor，When detect lithium battery temperature less than control chip U1 Programs setting at a temperature of limit value when，Control chip U1 output high level driving switch pipe conductings，So metal-oxide-semiconductor Q1 is also into conducting state，Constant pressure integrated chip U3 must establish beginning boosting work by cable，Stable driving voltage is provided for subsequent heat resistance，Adding thermal resistance component obtain it is electric after heated for lithium battery，On the contrary when temperature upper limit of the lithium battery temperature higher than the setting of control chip U1 Programs，Adding thermal resistance component power down，No longer heat for lithium battery，Lithium battery temperature slowly can be reduced，When lithium battery temperature again below control chip U1 Programs setting at a temperature of limit value when，Heater circuit is again started up，Circulate successively，Ensure lithium battery temperature in setting range.
Description
Technical field
The invention belongs to illumination circuit field, more particularly to a kind of LED lamp and its lithium battery heater circuit.
Background technology
With the continuous development of science and technology, new material new technology is constantly reformed, and lithium ion battery is stored up as new electric energy
Deposit medium to be widely used, it has the advantages that, and energy density is big, output voltage is high, self discharge is little, long circulation life, and technology is
Jing is ripe and is applied to every field, especially in portable lamp industry people generally using lithium ion battery as power supply,
But lithium ion battery is too low in temperature（Such as -40 degree）In the case of can not discharge, thus can not carry for LED drive circuit
For sufficient stable electric energy, the work of portable lamp is have impact on.
The content of the invention
It is an object of the invention to provide a kind of lithium battery heater circuit of LED lamp, it is intended to solve present lithium ion
Battery there is a problem of discharging in the case where temperature is too low.
The present invention is achieved in that a kind of LED lamp lithium battery heater circuit, is connected with lithium battery, the LED lamp
Lithium battery heater circuit includes：
Resistance R1, pull-up resistor R2, resistance R3, resistance R4, resistance R5, NTC thermistor R6, divider resistance R7, pull-up
Resistance R8, compensation resistance R9, sampling resistor R10, sampling resistor R11, adding thermal resistance component, filter capacitor C1, storage capacitor C2,
Start-up capacitance C3, compensating electric capacity C4, control chip U1, three-terminal voltage-stabilizing chip U2, constant pressure integrated chip U3, energy storage inductor L1, two
Pole pipe D1, switch S1, metal-oxide-semiconductor Q1 and switching tube；
The power end VCC of the control chip U1 connects positive source, and the output control terminal PB2 of the control chip U1 passes through
The resistance R5 connects the control end of the switching tube, and the on off state test side PB1 of the control chip U1 is by the pull-up
Resistance R2 connects positive source, and is grounded by the switch S1, and the battery temperature test side PB0 of the control chip U1 passes through
The divider resistance R7 connects reference voltage input PB4 of the control chip U1, and is connect by NTC thermistor R6
Ground, the ground terminal GND ground connection of the control chip U1, output end PB3 of the control chip U1 pass through the resistance R1 and three ends
Voltage stabilizing chip U2 is grounded, the public connecting end and the control end of three-terminal voltage-stabilizing chip U2 of the resistance R1 and three-terminal voltage-stabilizing chip U2
Reference voltage input PB4 of the control chip U1 is connect simultaneously, and the filter capacitor C1 is connected to the positive source with ground
Between, the resistance R3 and resistance R4 of the concatenation are connected between the positive source and the hot end of switching tube, described to open
The cold end ground connection of pipe is closed, the source electrode of the metal-oxide-semiconductor Q1 connects positive source, and the grid of the metal-oxide-semiconductor Q1 meets the resistance R3
With the public connecting end of resistance R4, the drain electrode of the metal-oxide-semiconductor Q1 meets the first end of the energy storage inductor L1, the energy storage inductor L1
The second termination diode D1 anode, the power input Vin of constant pressure integrated chip U3 connects the energy storage inductor
The first end of L1, the output switch end SW of constant pressure integrated chip U3 connect second end of the energy storage inductor L1, the constant pressure
The job control end SHDN of integrated chip U3 connects the drain electrode of the metal-oxide-semiconductor Q1 by the pull-up resistor R8, and the constant pressure is integrated
The frequency of chip U3 selects end FSEL ground connection, soft start end SS of constant pressure integrated chip U3 to connect by the start-up capacitance C3
Ground, the ground terminal GND ground connection of constant pressure integrated chip U3, the compensation end COMP of constant pressure integrated chip U3 pass through the benefit of series connection
Resistance R9 and compensating electric capacity C4 ground connection are repaid, the sampling resistor R10 and sampling resistor R11 is connected on the negative electrode of the diode D1
Between ground, the voltage sample feedback end FB of constant pressure integrated chip U3 connects the sampling resistor R10's and sampling resistor R11
Public connecting end, the adding thermal resistance component are arranged on the lithium battery surface, and are connected to the negative electrode of the diode D1
Between ground.
Another object of the present invention is to provide a kind of LED lamp including above-mentioned LED lamp lithium battery heater circuit.
In the present invention, lithium battery temperature is constantly detected by NTC thermistor, control is less than when lithium battery temperature is detected
At a temperature of the setting of coremaking piece U1 Programs during limit value, control chip U1 output high level driving switch pipe conductings, then metal-oxide-semiconductor
Also into conducting state, constant pressure integrated chip U3 must establish beginning boosting work by cable to Q1, provide stable driving for subsequent heat resistance
Voltage, adding thermal resistance component obtain it is electric after heated for lithium battery, on the contrary when lithium battery temperature is higher than control chip U1 Programs
During the temperature upper limit of setting, adding thermal resistance component power down is no longer heated for lithium battery, and lithium battery temperature slowly can be reduced, when
Lithium battery temperature is again below at a temperature of the setting of control chip U1 Programs, during limit value, heater circuit is again started up, and follows successively
Ring, it is ensured that lithium battery temperature is in setting range.
Description of the drawings
Fig. 1 is the circuit structure diagram of the LED lamp lithium battery heater circuit that first embodiment of the invention is provided；
Fig. 2 is the circuit structure diagram of the LED lamp lithium battery heater circuit that second embodiment of the invention is provided.
Specific embodiment
In order that the objects, technical solutions and advantages of the present invention become more apparent, it is below in conjunction with drawings and Examples, right
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only to explain the present invention, and
It is not used in the restriction present invention.
Fig. 1 shows the circuit structure of the LED lamp lithium battery heater circuit that first embodiment of the invention is provided, in order to just
In explanation, the part related to the embodiment of the present invention is illustrate only, details are as follows：
A kind of LED lamp lithium battery heater circuit, is connected with lithium battery, and LED lamp lithium battery heater circuit includes：
Resistance R1, pull-up resistor R2, resistance R3, resistance R4, resistance R5, NTC thermistor R6, divider resistance R7, pull-up
Resistance R8, compensation resistance R9, sampling resistor R10, sampling resistor R11, adding thermal resistance component 200, filter capacitor C1, storage capacitor
C2, start-up capacitance C3, compensating electric capacity C4, control chip U1, three-terminal voltage-stabilizing chip U2, constant pressure integrated chip U3, energy storage inductor L1,
Diode D1, switch S1, metal-oxide-semiconductor Q1 and switching tube 100；
The power end VCC of control chip U1 connects power supply BT positive poles, and the output control terminal PB2 of control chip U1 passes through resistance R5
The control end of switching tube 100 is connect, the on off state test side PB1 of control chip U1 connects power supply BT positive poles by pull-up resistor R2,
And by switching S1 ground connection, the battery temperature test side PB0 of control chip U1 connects control chip U1's by divider resistance R7
Reference voltage input PB4, and be grounded by NTC thermistor R6, the ground terminal GND ground connection of control chip U1, control chip
Output end PB3 of U1 passes through resistance R1 and three-terminal voltage-stabilizing chip U2 and is grounded, and resistance R1 is commonly connected with three-terminal voltage-stabilizing chip U2's
The control end of end and three-terminal voltage-stabilizing chip U2 connects reference voltage input PB4 of control chip U1, filter capacitor C1 connections simultaneously
Between power supply BT positive poles and ground, the resistance R3 and resistance R4 of concatenation are connected to the high potential of power supply BT positive poles and switching tube 100
Between end, the cold end ground connection of switching tube 100, the source electrode of metal-oxide-semiconductor Q1 connect power supply BT positive poles, the grid connecting resistance of metal-oxide-semiconductor Q1
The public connecting end of R3 and resistance R4, the drain electrode of metal-oxide-semiconductor Q1 connect the first end of energy storage inductor L1, second termination of energy storage inductor L1
The anode of diode D1, the power input Vin of constant pressure integrated chip U3 connect the first end of energy storage inductor L1, constant pressure integrated chip
The output switch end SW of U3 connects second end of energy storage inductor L1, and the job control end SHDN of constant pressure integrated chip U3 is by pulling up electricity
Resistance R8 connects the drain electrode of metal-oxide-semiconductor Q1, and the frequency of constant pressure integrated chip U3 selects end FSEL ground connection, the soft start of constant pressure integrated chip U3
End SS is grounded by start-up capacitance C3, the ground terminal GND ground connection of constant pressure integrated chip U3, the compensation end COMP of constant pressure integrated chip U3
It is grounded by the compensation resistance R9 and compensating electric capacity C4 that connect, sampling resistor R10 and sampling resistor R11 is connected on diode D1's
Between negative electrode and ground, the voltage sample feedback end FB of constant pressure integrated chip U3 connects the public of sampling resistor R10 and sampling resistor R11
Connection end, adding thermal resistance component 200 are arranged on lithium battery surface, and are connected between the negative electrode and ground of diode D1.
Used as one embodiment of the invention, switching tube 100 adopts NPN type triode Q2, and the base stage of NPN type triode Q2 is to open
Close pipe 100 control end, the hot end of the current collection extremely switching tube 100 of NPN type triode Q2, NPN type triode Q2 send out
Cold end of the emitter-base bandgap grading for switching tube 100.
Fig. 2 shows the circuit structure of the LED lamp lithium battery heater circuit that second embodiment of the invention is provided, in order to just
In explanation, the part related to the embodiment of the present invention is illustrate only, details are as follows：
Used as one embodiment of the invention, switching tube 100 adopts N-type metal-oxide-semiconductor Q3, and the grid of N-type metal-oxide-semiconductor Q3 is switching tube
100 control end, the drain electrode of N-type metal-oxide-semiconductor Q3 are the hot end of switching tube 100, and the source electrode of N-type metal-oxide-semiconductor Q3 is switching tube 100
Cold end.
So that switching tube 100 is using NPN type triode Q2 as an example, the operation principle of LED lamp lithium battery heater circuit is entered
Row explanation：
First, user as needed, by the program in editor control chip U1, arranges temperature upper limit and lowest temperature
Value.
When switch S 1 is not pressed, control chip U1 is in dormancy holding state, NPN type triode Q2 and metal-oxide-semiconductor
Q1 is in cut-off state, constant pressure integrated chip U3 not it is electric, be also at dormancy holding state, export to adding thermal resistance without electric energy
Component 200, does not now heat to lithium battery.
When under switching S1 and be pressed for the first time, control chip U1 starts start-up operation, NTC temperature-sensitives electricity after sampling signal
Resistance R6 constantly detects lithium battery temperature, and control chip U1 receives lithium battery temperature signal by battery temperature test side PB0, works as inspection
When the lithium battery temperature for measuring is less than limit value at a temperature of the setting of control chip U1 Programs, the output control terminal of control chip U1
PB2 output high level drives the conducting of NPN type triode Q2, then metal-oxide-semiconductor Q1 is obtained also into conducting state, constant pressure integrated chip U3
Establish beginning boosting work by cable, be that subsequent heat resistor assembly 200 provides stable driving voltage, adding thermal resistance component 200 it is electric after
Heated for lithium battery.When temperature upper limit of the lithium battery temperature higher than the setting of control chip U1 Programs, control chip
The output control terminal PB2 output low levels of U1, NPN type triode Q2 enter cut-off state by turning on, then metal-oxide-semiconductor Q1 is also by leading
Logical to enter cut-off state, constant pressure integrated chip U3 current supply circuit is cut off, the also power down of adding thermal resistance component 200, is no longer lithium electricity
Pond is heated, and lithium battery temperature slowly can be reduced, at a temperature of lithium battery temperature is again below the setting of control chip U1 Programs
During limit value, the control chip U1 above-mentioned lithium battery heater circuit work of secondary control again is circulated, it is ensured that lithium battery temperature is in setting successively
In temperature range.
When second by compress switch S1 when, that is, close whole circuit, control chip U1 enters resting state.
The embodiment of the present invention also provides a kind of LED lamp, including lithium battery, and LED lamp also includes being connected such as with lithium battery
Upper described LED lamp lithium battery heater circuit.
In embodiments of the present invention, lithium battery temperature is constantly detected by NTC thermistor, when detecting lithium battery temperature
Less than at a temperature of the setting of control chip U1 Programs, during limit value, control chip U1 output high level driving switch pipes are turned on, that
Also into conducting state, constant pressure integrated chip U3 must establish beginning boosting work by cable to metal-oxide-semiconductor Q1, provide stable for subsequent heat resistance
Driving voltage, adding thermal resistance component obtain it is electric after heated for lithium battery, on the contrary when lithium battery temperature is higher than control chip U1
During the temperature upper limit of Program setting, adding thermal resistance component power down is no longer heated for lithium battery, and lithium battery temperature slowly can drop
It is low, when lithium battery temperature again below control chip U1 Programs setting at a temperature of limit value when, heater circuit is again started up, according to
Secondary circulation, it is ensured that lithium battery temperature is in setting range.
Presently preferred embodiments of the present invention is the foregoing is only, not to limit the present invention, all essences in the present invention
Any modification, equivalent and improvement made within god and principle etc., should be included within the scope of the present invention.
Claims (6)
1. a kind of LED lamp lithium battery heater circuit, is connected with lithium battery, it is characterised in that the LED lamp lithium battery heating
Circuit includes：
Resistance R1, pull-up resistor R2, resistance R3, resistance R4, resistance R5, NTC thermistor R6, divider resistance R7, pull-up resistor
R8, compensation resistance R9, sampling resistor R10, sampling resistor R11, adding thermal resistance component, filter capacitor C1, storage capacitor C2, startup
Electric capacity C3, compensating electric capacity C4, control chip U1, three-terminal voltage-stabilizing chip U2, constant pressure integrated chip U3, energy storage inductor L1, diode
D1, switch S1, metal-oxide-semiconductor Q1 and switching tube；
The power end VCC of the control chip U1 connects positive source, and the output control terminal PB2 of the control chip U1 is by described
Resistance R5 connects the control end of the switching tube, and the on off state test side PB1 of the control chip U1 passes through the pull-up resistor
R2 connects positive source, and is grounded by the switch S1, and the battery temperature test side PB0 of the control chip U1 is by described
Divider resistance R7 connects reference voltage input PB4 of the control chip U1, and is grounded by NTC thermistor R6,
The ground terminal GND ground connection of the control chip U1, output end PB3 of the control chip U1 pass through the resistance R1 and three-terminal voltage-stabilizing
Chip U2 is grounded, and the control end of the public connecting end and three-terminal voltage-stabilizing chip U2 of the resistance R1 and three-terminal voltage-stabilizing chip U2 is simultaneously
Reference voltage input PB4 of the control chip U1 is connect, the filter capacitor C1 is connected between the positive source and ground,
The resistance R3 and resistance R4 of concatenation is connected between the positive source and the hot end of switching tube, the switching tube
Cold end is grounded, and the source electrode of the metal-oxide-semiconductor Q1 connects positive source, and the grid of the metal-oxide-semiconductor Q1 connects the resistance R3 and resistance
The public connecting end of R4, the drain electrode of the metal-oxide-semiconductor Q1 connect the first end of the energy storage inductor L1, and the second of the energy storage inductor L1
The anode of the diode D1 is terminated, the power input Vin of constant pressure integrated chip U3 connects the of the energy storage inductor L1
One end, the output switch end SW of constant pressure integrated chip U3 connect second end of the energy storage inductor L1, the integrated core of the constant pressure
The job control end SHDN of piece U3 connects the drain electrode of the metal-oxide-semiconductor Q1, constant pressure integrated chip U3 by the pull-up resistor R8
Frequency select end FSEL ground connection, soft start end SS of constant pressure integrated chip U3 is by start-up capacitance C3 ground connection, institute
The ground terminal GND ground connection of constant pressure integrated chip U3 is stated, the compensation end COMP of constant pressure integrated chip U3 is electric by the compensation of series connection
Resistance R9 and compensating electric capacity C4 ground connection, the sampling resistor R10 and sampling resistor R11 are connected on the negative electrode and ground of the diode D1
Between, the voltage sample feedback end FB of constant pressure integrated chip U3 connects the public of the sampling resistor R10 and sampling resistor R11
Connection end, the adding thermal resistance component are arranged on the lithium battery surface, and are connected to the negative electrode and ground of the diode D1
Between.
2. LED lamp lithium battery heater circuit as claimed in claim 1, it is characterised in that the switching tube adopts NPN type three
Pole pipe Q2, the base stage of NPN type triode Q2 are the control end of the switching tube, the colelctor electrode of NPN type triode Q2
For the hot end of the switching tube, the cold end of the extremely described switching tube of transmitting of NPN type triode Q2.
3. LED lamp lithium battery heater circuit as claimed in claim 1, it is characterised in that the switching tube adopts N-type MOS
The grid of pipe Q3, the N-type metal-oxide-semiconductor Q3 is the control end of the switching tube, and the drain electrode of the N-type metal-oxide-semiconductor Q3 is the switch
The hot end of pipe, the source electrode of the N-type metal-oxide-semiconductor Q3 is the cold end of the switching tube.
4. a kind of LED lamp, including lithium battery, the LED lamp also include the LED lamp lithium battery being connected with the lithium battery
Heater circuit, the LED lamp lithium battery heater circuit include：
Resistance R1, pull-up resistor R2, resistance R3, resistance R4, resistance R5, NTC thermistor R6, divider resistance R7, pull-up resistor
R8, compensation resistance R9, sampling resistor R10, sampling resistor R11, adding thermal resistance component, filter capacitor C1, storage capacitor C2, startup
Electric capacity C3, compensating electric capacity C4, control chip U1, three-terminal voltage-stabilizing chip U2, constant pressure integrated chip U3, energy storage inductor L1, diode
D1, switch S1, metal-oxide-semiconductor Q1 and switching tube；
The power end VCC of the control chip U1 connects positive source, and the output control terminal PB2 of the control chip U1 is by described
Resistance R5 connects the control end of the switching tube, and the on off state test side PB1 of the control chip U1 passes through the pull-up resistor
R2 connects positive source, and is grounded by the switch S1, and the battery temperature test side PB0 of the control chip U1 is by described
Divider resistance R7 connects reference voltage input PB4 of the control chip U1, and is grounded by NTC thermistor R6,
The ground terminal GND ground connection of the control chip U1, output end PB3 of the control chip U1 pass through the resistance R1 and three-terminal voltage-stabilizing
Chip U2 is grounded, and the control end of the public connecting end and three-terminal voltage-stabilizing chip U2 of the resistance R1 and three-terminal voltage-stabilizing chip U2 is simultaneously
Reference voltage input PB4 of the control chip U1 is connect, the filter capacitor C1 is connected between the positive source and ground,
The resistance R3 and resistance R4 of concatenation is connected between the positive source and the hot end of switching tube, the switching tube
Cold end is grounded, and the source electrode of the metal-oxide-semiconductor Q1 connects positive source, and the grid of the metal-oxide-semiconductor Q1 connects the resistance R3 and resistance
The public connecting end of R4, the drain electrode of the metal-oxide-semiconductor Q1 connect the first end of the energy storage inductor L1, and the second of the energy storage inductor L1
The anode of the diode D1 is terminated, the power input Vin of constant pressure integrated chip U3 connects the of the energy storage inductor L1
One end, the output switch end SW of constant pressure integrated chip U3 connect second end of the energy storage inductor L1, the integrated core of the constant pressure
The job control end SHDN of piece U3 connects the drain electrode of the metal-oxide-semiconductor Q1, constant pressure integrated chip U3 by the pull-up resistor R8
Frequency select end FSEL ground connection, soft start end SS of constant pressure integrated chip U3 is by start-up capacitance C3 ground connection, institute
The ground terminal GND ground connection of constant pressure integrated chip U3 is stated, the compensation end COMP of constant pressure integrated chip U3 is electric by the compensation of series connection
Resistance R9 and compensating electric capacity C4 ground connection, the sampling resistor R10 and sampling resistor R11 are connected on the negative electrode and ground of the diode D1
Between, the voltage sample feedback end FB of constant pressure integrated chip U3 connects the public of the sampling resistor R10 and sampling resistor R11
Connection end, the adding thermal resistance component are arranged on the lithium battery surface, and are connected to the negative electrode and ground of the diode D1
Between.
5. LED lamp as claimed in claim 4, it is characterised in that the switching tube adopts NPN type triode Q2, the NPN
The base stage of type triode Q2 is the control end of the switching tube, the extremely described switching tube of current collection of NPN type triode Q2
Hot end, the cold end of the extremely described switching tube of transmitting of NPN type triode Q2.
6. LED lamp as claimed in claim 4, it is characterised in that the switching tube adopts N-type metal-oxide-semiconductor Q3, N-type MOS
The grid of pipe Q3 is the control end of the switching tube, the hot end drained as the switching tube of the N-type metal-oxide-semiconductor Q3, institute
The source electrode for stating N-type metal-oxide-semiconductor Q3 is the cold end of the switching tube.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210140131.0A CN103390778B (en) | 2012-05-08 | 2012-05-08 | A kind of LED lamp and its lithium battery heater circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210140131.0A CN103390778B (en) | 2012-05-08 | 2012-05-08 | A kind of LED lamp and its lithium battery heater circuit |
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| CN103390778A CN103390778A (en) | 2013-11-13 |
| CN103390778B true CN103390778B (en) | 2017-04-05 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105449312B (en) * | 2015-10-13 | 2019-05-14 | 华富(江苏)锂电新技术有限公司 | A kind of heating control circuit for lithium ion battery |
| CN106602176A (en) * | 2015-10-15 | 2017-04-26 | 深圳富泰宏精密工业有限公司 | Low-temperature heating system and electronic device |
| CN106602178A (en) * | 2017-01-09 | 2017-04-26 | 扬州兴通锂电科技有限公司 | Lithium battery heating system |
| CN110474132A (en) * | 2019-09-12 | 2019-11-19 | 华霆（合肥）动力技术有限公司 | Mould group heating system, battery system and power vehicle |
| CN113054267A (en) * | 2021-03-12 | 2021-06-29 | 海洋王（东莞）照明科技有限公司 | Battery protection circuit and battery module of emergency lamp and emergency lamp |
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| CN201267041Y (en) * | 2008-08-26 | 2009-07-01 | 比亚迪股份有限公司 | Emergency illuminator |
| CN102055042A (en) * | 2009-10-29 | 2011-05-11 | 比亚迪股份有限公司 | Battery heating control system for vehicles and control method thereof |
| CN102074753A (en) * | 2010-07-30 | 2011-05-25 | 比亚迪股份有限公司 | Heating circuit of battery |
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| US6002240A (en) * | 1997-12-12 | 1999-12-14 | Dell Usa, L.P. | Self heating of batteries at low temperatures |
| CN201267041Y (en) * | 2008-08-26 | 2009-07-01 | 比亚迪股份有限公司 | Emergency illuminator |
| CN102055042A (en) * | 2009-10-29 | 2011-05-11 | 比亚迪股份有限公司 | Battery heating control system for vehicles and control method thereof |
| CN102074753A (en) * | 2010-07-30 | 2011-05-25 | 比亚迪股份有限公司 | Heating circuit of battery |
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