CN204167880U - Battery pack overheat protector power supply circuits - Google Patents

Battery pack overheat protector power supply circuits Download PDF

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Publication number
CN204167880U
CN204167880U CN201420666521.6U CN201420666521U CN204167880U CN 204167880 U CN204167880 U CN 204167880U CN 201420666521 U CN201420666521 U CN 201420666521U CN 204167880 U CN204167880 U CN 204167880U
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CN
China
Prior art keywords
field effect
effect transistor
battery pack
resistance
connects
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Withdrawn - After Issue
Application number
CN201420666521.6U
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Chinese (zh)
Inventor
黄延新
邓纶浩
杨圣峯
黄晓东
何鹏
彭建普
凌敏科
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SHENZHEN ZHUONENG NEW ENERGY CO., LTD.
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SHENZHEN ZHUONENG NEW ENERGY TECHNOLOGY CO LTD
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Priority to CN201420666521.6U priority Critical patent/CN204167880U/en
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Publication of CN204167880U publication Critical patent/CN204167880U/en
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Abstract

Battery pack overheat protector uninterrupted power supply device comprises control circuit, some battery pack, some excess temperature testing circuits and some discharge and recharge drive circuits; Some battery pack are connected in parallel; Each battery pack comprises some battery cores be connected in series; The positive terminal of each battery pack connects the positive output end of this device, and the negative pole end of each battery pack connects the negative output terminal of this device by corresponding discharge and recharge drive circuit; Each excess temperature testing circuit is for detecting the temperature of each battery core of corresponding battery pack, and the temperature value of each battery core and preset temperature secure threshold are compared, when the temperature value of each battery core is all less than preset temperature secure threshold, output temperature normal signal to control circuit, to drive corresponding discharge and recharge drive circuit conducting; When the temperature value of at least one battery core is greater than preset temperature secure threshold, this excess temperature testing circuit exports excess temperature signal to control circuit, to control corresponding discharge and recharge drive circuit cut-off.Above-mentioned utility model can provide the power supply of stability and safety.

Description

Battery pack overheat protector power supply circuits
Technical field
The utility model relates to a kind of battery pack overheat protector power supply circuits.
Background technology
Along with social development, the market demand of new forms of energy battery pack is increasing, particularly the vehicles such as electric automobile, scooter of high-end field.When battery pack temperature is too high, if continue to use (i.e. charge or discharge), very big infringement will be brought to battery pack, even cause the security incidents such as on fire, blast.
As shown in Figure 1, existing battery pack thermal-shutdown circuit adopt one to be arranged on ambient temperature that mechanical type temperature switch near battery pack or Resistance Temperature switch detect battery pack, when excess temperature being detected, system carries out power down process.Battery pack is generally composed in series by some battery cores, and temperature switch detects is ambient temperature near it, if the battery core of serious heating is away from temperature switch, so, when temperature switch detects excess temperature, this battery core of seriously generating heat may be damaged, especially when rate of rise in temperature is very fast, and temperature switch is not when also reacting, the temperature of whole battery pack may be out of control.In addition, above-mentioned battery pack just directly cuts off current supply circuit after excess temperature being detected, and can not send early warning signal in advance, for the vehicle quite dangerous of running at high speed, easily causes serious traffic accident.
Utility model content
For the deficiencies in the prior art, the utility model is intended to provide a kind of battery pack overheat protector uninterrupted power supply device solved the problems of the technologies described above.
For achieving the above object, the utility model adopts following technical scheme:
A kind of battery pack overheat protector uninterrupted power supply device, it comprises control circuit, some battery pack, some excess temperature testing circuits and some discharge and recharge drive circuits; Battery pack, excess temperature testing circuit and discharge and recharge drive circuit one_to_one corresponding;
Some battery pack are connected in parallel; Each battery pack comprises some battery cores be connected in series; The positive terminal of each battery pack connects the positive output end of this device, and the negative pole end of each battery pack connects the negative output terminal of this device by corresponding discharge and recharge drive circuit;
Each excess temperature testing circuit is for detecting the temperature of each battery core of corresponding battery pack, and the temperature value of each battery core and preset temperature secure threshold are compared, when the temperature value of each battery core is all less than preset temperature secure threshold, output temperature normal signal is to control circuit, control circuit is used for driving corresponding discharge and recharge drive circuit conducting according to this temperature normal signal, to make corresponding battery set charge/discharge; When the temperature value of at least one battery core is greater than preset temperature secure threshold, this excess temperature testing circuit exports excess temperature signal to control circuit, the discharge and recharge drive circuit cut-off that control circuit is corresponding according to this excess temperature signal controlling, stops discharge and recharge to make corresponding battery pack.
Preferably, each excess temperature testing circuit comprises the thermistor of some negative temperature coefficients, some resistance, some comparators and one or door, or the battery core one_to_one corresponding of the input quantity of door, thermistor, resistance, comparator and corresponding battery pack;
Each thermistor is for detecting the temperature of a battery core corresponding to battery pack, and one end of each thermistor connects a DC power supply, the other end ground connection of each thermistor by corresponding resistance; The end of oppisite phase of each comparator is connected between corresponding thermistor and the resistance of correspondence, and the in-phase end of each comparator is by a threshold voltage source ground connection; The output of each comparator connects the input of the correspondence of this or door, should or the output of door connect this control circuit.
Preferably, this device also comprises some delay circuits, and each delay circuit is connected between corresponding excess temperature testing circuit and this control circuit.
Preferably, each discharge and recharge drive circuit comprises the first electric capacity, the second electric capacity, the first resistance to the 4th resistance, the first triode, the second triode, the first field effect transistor to the 4th field effect transistor;
First electric capacity and the first resistance are in parallel, and the base stage of the first triode connects this negative output terminal by the first resistance, also connects a DC power supply, and the collector electrode of the first triode connects DC power supply, and the emitter of the first triode connects negative output terminal; First field effect transistor is all connected DC power supply with the grid of the second field effect transistor, and the source electrode of the first field effect transistor connects negative output terminal, and the drain electrode of the first field effect transistor connects the drain electrode of the second field effect transistor, the negative pole end of the corresponding battery pack of source electrode of the second field effect transistor; The emitter of the second triode connects the source electrode of the second field effect transistor, the collector electrode of the second triode connects DC power supply, second resistance is connected with the second Capacitance parallel connection, the base stage of the second triode connects the source electrode of the second field effect transistor by the second resistance, be also connected DC power supply by the 4th resistance with the 3rd resistance successively; The source electrode of the 4th field effect transistor connects DC power supply, the drain electrode of the 4th field effect transistor is connected between the 4th resistance and the 3rd resistance, the drain electrode of the 4th field effect transistor connects the drain electrode of the 3rd field effect transistor, the source electrode of the 4th field effect transistor connects the negative pole end of battery pack, the equal connection control circuit of grid of the 4th field effect transistor and the 3rd field effect transistor.
Preferably, this device also comprises overtemperature alarm circuit, and control circuit also drives overtemperature alarm circuit to give the alarm according to this excess temperature signal.
Preferably, this overtemperature alarm circuit comprises the first field effect transistor, the first resistance, the second resistance, the second field effect transistor, the 3rd field effect transistor, buzzer and light-emitting diode;
Second field effect transistor is connected with the drain electrode of the 3rd field effect transistor, and the source electrode of the second field effect transistor connects DC power supply, the source ground of the 3rd field effect transistor, the grid connection control circuit of the second field effect transistor and the 3rd field effect transistor; The grid of the first field effect transistor connects the drain electrode of the second field effect transistor, also connect positive output end by the second resistance, the source electrode of the first field effect transistor connects positive output end, the anode of the first resistance and buzzer connecting luminous diode, the minus earth of light-emitting diode are passed through in the drain electrode of the first field effect transistor successively.
The beneficial effects of the utility model are as follows:
The each battery core of above-mentioned utility model to each battery pack carries out temperature detection respectively, make corresponding battery pack stop fully electricity when at least one battery core excess temperature of battery pack being detected, and the normal discharge and recharge of other battery pack, so, a certain battery core can be fundamentally avoided to damage due to excess temperature, meanwhile, ensure the uninterrupted power supply of this device, power to provide stability and safety.After this battery pack stops abundant electricity, when temperature can be slowly down to below temperature safety threshold value, this battery pack can restart abundant electricity again, so, not only can ensure that the stability and safety of this device is powered, and also can extend the useful life of this device.
Accompanying drawing explanation
Fig. 1 is the electrical schematic diagram of the better embodiment of the utility model battery pack overheat protector uninterrupted power supply device.
Fig. 2 is the circuit diagram of the excess temperature testing circuit of the battery pack overheat protector uninterrupted power supply device of Fig. 1.
Fig. 3 is the circuit diagram of the discharge and recharge drive circuit of the battery pack overheat protector uninterrupted power supply device of Fig. 1.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is described further:
Refer to Fig. 1, the utility model relates to a kind of battery pack overheat protector uninterrupted power supply device, and its better embodiment comprises control circuit, some battery pack, some excess temperature testing circuits and some discharge and recharge drive circuits; Battery pack, excess temperature testing circuit and discharge and recharge drive circuit one_to_one corresponding.
Some battery pack are connected in parallel.Each battery pack comprises some battery core B0 be connected in series.The positive terminal of each battery pack connects the positive output end PACK+ of this device, and the negative pole end of each battery pack connects the negative output terminal PACK-of this device by corresponding discharge and recharge drive circuit.The quantity of battery pack can be two or more.
Each excess temperature testing circuit is for detecting the temperature of each battery core B0 of corresponding battery pack, and the temperature value of each battery core B0 and preset temperature secure threshold are compared, when the temperature value of each battery core B0 is all less than preset temperature secure threshold, output temperature normal signal is to control circuit, control circuit is used for driving corresponding discharge and recharge drive circuit conducting according to this temperature normal signal, to make the corresponding normal discharge and recharge of battery pack; When the temperature value of at least one battery core B0 is greater than preset temperature secure threshold, this excess temperature testing circuit exports excess temperature signal to control circuit, the discharge and recharge drive circuit cut-off that control circuit is corresponding according to this excess temperature signal controlling, stops discharge and recharge to make corresponding battery pack.
The each battery core B0 of above-mentioned utility model to each battery pack carries out temperature detection respectively, make corresponding battery pack stop fully electricity when at least one battery core B0 excess temperature of battery pack being detected, and the normal discharge and recharge of other battery pack, so, a certain battery core can be fundamentally avoided to damage due to excess temperature, meanwhile, ensure the uninterrupted power supply of this device, power to provide stability and safety.After this battery pack stops abundant electricity, when temperature can be slowly down to below temperature safety threshold value, this battery pack can restart abundant electricity again, so, not only can ensure that the stability and safety of this device is powered, and also can extend the useful life of this device.
See Fig. 2, in the present embodiment, each excess temperature testing circuit comprises the thermistor NTC of some negative temperature coefficients, some resistance R1, some comparator U1 and one or door U2, or the battery core B0 one_to_one corresponding of the input quantity of door U2, thermistor NTC, resistance R1, comparator U1 and corresponding battery pack.
Each thermistor NTC is for detecting the temperature of a battery core B0 corresponding to battery pack, and one end of each thermistor NTC connects a DC power supply VCC, the other end ground connection of each thermistor NTC by corresponding resistance R1.The end of oppisite phase of each comparator U1 is connected between corresponding thermistor NTC and the resistance R1 of correspondence, and the in-phase end of each comparator U1 is by a threshold voltage source Vref ground connection.The output of each comparator U1 connects the input of the correspondence of this or door U2, should or the output of door U2 connect this control circuit.
Preferably, this device also comprises some delay circuits, and each delay circuit is connected between corresponding excess temperature testing circuit and this control circuit.In the present embodiment, the output of each or door U2 connects this control circuit by corresponding delay circuit.
See Fig. 3, in the present embodiment, each discharge and recharge drive circuit comprises electric capacity C1, electric capacity C2, resistance R2 to resistance R5, triode Q1, triode Q6, field effect transistor Q2 to field effect transistor Q5.
Electric capacity C1 and resistance R2 is in parallel, and the base stage of triode Q1 connects negative output terminal PACK-by resistance R2, and the collector electrode also connecting DC power supply VCC, triode Q1 connects the emitter connection negative output terminal PACK-of DC power supply VCC, triode Q1.Field effect transistor Q2 is all connected DC power supply VCC with the grid of field effect transistor Q3, and the source electrode of field effect transistor Q2 connects negative output terminal PACK-, and the drain electrode of field effect transistor Q2 connects the drain electrode of field effect transistor Q3, the negative pole end of the corresponding battery pack of source electrode of field effect transistor Q3; The emitter of triode Q6 connects the source electrode of field effect transistor Q3, the collector electrode of triode Q6 connects DC power supply VCC, resistance R3 and electric capacity C2 is connected in parallel, and the base stage of triode Q6 connects the source electrode of field effect transistor Q3 by resistance R3, be also connected DC power supply VCC by resistance R5 with resistance R4 successively; The source electrode of field effect transistor Q4 connects DC power supply VCC, the drain electrode of field effect transistor Q4 is connected between resistance R5 and resistance R4, the drain electrode of field effect transistor Q5 connects the drain electrode of field effect transistor Q4, the source electrode of field effect transistor Q5 connects the negative pole end of battery pack, the equal connection control circuit of grid of field effect transistor Q5 and field effect transistor Q4.
In the present embodiment, this device also comprises overtemperature alarm circuit, and control circuit also drives overtemperature alarm circuit to give the alarm according to this excess temperature signal, as with sound or/and the mode reminding user of light.
This overtemperature alarm circuit comprises field effect transistor Q7, resistance R7, resistance R8, field effect transistor Q8, field effect transistor Q9, buzzer LS1 and light-emitting diode D1.
Field effect transistor Q8 is connected with the drain electrode of field effect transistor Q9, and the source electrode of field effect transistor Q8 connects the source ground of DC power supply VCC, field effect transistor Q9, the grid connection control circuit of field effect transistor Q8 and field effect transistor Q9.The grid of field effect transistor Q7 connects the drain electrode of field effect transistor Q8, also connect positive output end PACK+ by resistance R8, the source electrode of field effect transistor Q7 connects positive output end PACK+, the anode of resistance R7 and buzzer LS1 connecting luminous diode D1, the minus earth of light-emitting diode D1 are passed through in the drain electrode of field effect transistor Q7 successively.
The operation principle of the overheat protector of the present embodiment is as follows:
Each thermistor NTC is for detecting a corresponding battery core B0, when the temperature of a wherein battery core B0 of battery pack is more and more higher, the resistance of thermistor NTC will be more and more less, make the voltage of thermistor NTC also more and more less, when the voltage of thermistor NTC is less than the voltage of threshold power Vref, comparator U1 exports high level signal, make or door U2 export high level signal to control circuit, high level signal is exported to make control circuit, and then make field effect transistor Q4 conducting, and field effect transistor Q5 cut-off, thus make triode Q1 and triode Q2 conducting, and then field effect transistor Q2 and field effect transistor Q3 is all ended, thus make corresponding battery pack stop discharge and recharge, to reduce battery core temperature.
And other normothermic battery pack, voltage due to each thermistor NTC is all greater than the voltage of threshold power Vref, the equal output low level signal of each comparator U2, make or door U2 output low level signal to control circuit, to make control circuit output low level signal, and then field effect transistor Q4 is ended, and field effect transistor Q5 conducting, thus triode Q1 and triode Q2 is ended, and then make field effect transistor Q2 and field effect transistor Q3 conducting, thus make the normal fully electricity of battery pack, to ensure uninterrupted power supply.
In addition, when this control circuit exports high level signal (i.e. battery pack excess temperature), field effect transistor Q8 ends, and field effect transistor Q9 conducting, and then make field effect transistor Q7 conducting, thus buzzer LS1 is sounded, light-emitting diode D1 is luminous simultaneously, to point out excess temperature.
From the above, triode Q1 and triode Q6 plays electronic switching, and electronic switch such as field effect transistor or the electronic switch chip that can possess identical function by other are replaced.Field effect transistor Q4, field effect transistor Q5, field effect transistor Q8, field effect transistor Q9 and field effect transistor Q7 play electronic switching, and electronic switch such as triode or the electronic switch chip that can possess identical function by other are replaced.
Electric capacity C1 and electric capacity C2 strobes, and in other embodiments, can not need electric capacity C1 and electric capacity C2.
For a person skilled in the art, according to technical scheme described above and design, other various corresponding change and distortion can be made, and all these change and distortion all should belong within the protection range of the utility model claim.

Claims (6)

1. a battery pack overheat protector uninterrupted power supply device, is characterized in that: it comprises control circuit, some battery pack, some excess temperature testing circuits and some discharge and recharge drive circuits;
Battery pack, excess temperature testing circuit and discharge and recharge drive circuit one_to_one corresponding;
Some battery pack are connected in parallel; Each battery pack comprises some battery cores be connected in series; The positive terminal of each battery pack connects the positive output end of this device, and the negative pole end of each battery pack connects the negative output terminal of this device by corresponding discharge and recharge drive circuit;
Each excess temperature testing circuit is for detecting the temperature of each battery core of corresponding battery pack, and the temperature value of each battery core and preset temperature secure threshold are compared, when the temperature value of each battery core is all less than preset temperature secure threshold, output temperature normal signal is to control circuit, control circuit is used for driving corresponding discharge and recharge drive circuit conducting according to this temperature normal signal, to make corresponding battery set charge/discharge; When the temperature value of at least one battery core is greater than preset temperature secure threshold, this excess temperature testing circuit exports excess temperature signal to control circuit, the discharge and recharge drive circuit cut-off that control circuit is corresponding according to this excess temperature signal controlling, stops discharge and recharge to make corresponding battery pack.
2. battery pack overheat protector uninterrupted power supply device as claimed in claim 1, it is characterized in that: each excess temperature testing circuit comprises the thermistor of some negative temperature coefficients, some resistance, some comparators and one or door, or the battery core one_to_one corresponding of the input quantity of door, thermistor, resistance, comparator and corresponding battery pack;
Each thermistor is for detecting the temperature of a battery core corresponding to battery pack, and one end of each thermistor connects a DC power supply, the other end ground connection of each thermistor by corresponding resistance; The end of oppisite phase of each comparator is connected between corresponding thermistor and the resistance of correspondence, and the in-phase end of each comparator is by a threshold voltage source ground connection; The output of each comparator connects the input of the correspondence of this or door, should or the output of door connect this control circuit.
3. battery pack overheat protector uninterrupted power supply device as claimed in claim 1, is characterized in that: this device also comprises some delay circuits, and each delay circuit is connected between corresponding excess temperature testing circuit and this control circuit.
4. battery pack overheat protector uninterrupted power supply device as claimed in claim 1, is characterized in that: each discharge and recharge drive circuit comprises the first electric capacity, the second electric capacity, the first resistance to the 4th resistance, the first triode, the second triode, the first field effect transistor to the 4th field effect transistor;
First electric capacity and the first resistance are in parallel, and the base stage of the first triode connects this negative output terminal by the first resistance, also connects a DC power supply, and the collector electrode of the first triode connects DC power supply, and the emitter of the first triode connects negative output terminal; First field effect transistor is all connected DC power supply with the grid of the second field effect transistor, and the source electrode of the first field effect transistor connects negative output terminal, and the drain electrode of the first field effect transistor connects the drain electrode of the second field effect transistor, the negative pole end of the corresponding battery pack of source electrode of the second field effect transistor; The emitter of the second triode connects the source electrode of the second field effect transistor, the collector electrode of the second triode connects DC power supply, second resistance is connected with the second Capacitance parallel connection, the base stage of the second triode connects the source electrode of the second field effect transistor by the second resistance, be also connected DC power supply by the 4th resistance with the 3rd resistance successively; The source electrode of the 4th field effect transistor connects DC power supply, the drain electrode of the 4th field effect transistor is connected between the 4th resistance and the 3rd resistance, the drain electrode of the 4th field effect transistor connects the drain electrode of the 3rd field effect transistor, the source electrode of the 4th field effect transistor connects the negative pole end of battery pack, the equal connection control circuit of grid of the 4th field effect transistor and the 3rd field effect transistor.
5. battery pack overheat protector uninterrupted power supply device as claimed in claim 1, is characterized in that: this device also comprises overtemperature alarm circuit, and control circuit also drives overtemperature alarm circuit to give the alarm according to this excess temperature signal.
6. battery pack overheat protector uninterrupted power supply device as claimed in claim 5, is characterized in that: this overtemperature alarm circuit comprises the first field effect transistor, the first resistance, the second resistance, the second field effect transistor, the 3rd field effect transistor, buzzer and light-emitting diode;
Second field effect transistor is connected with the drain electrode of the 3rd field effect transistor, and the source electrode of the second field effect transistor connects DC power supply, the source ground of the 3rd field effect transistor, the grid connection control circuit of the second field effect transistor and the 3rd field effect transistor; The grid of the first field effect transistor connects the drain electrode of the second field effect transistor, also connect positive output end by the second resistance, the source electrode of the first field effect transistor connects positive output end, the anode of the first resistance and buzzer connecting luminous diode, the minus earth of light-emitting diode are passed through in the drain electrode of the first field effect transistor successively.
CN201420666521.6U 2014-11-10 2014-11-10 Battery pack overheat protector power supply circuits Withdrawn - After Issue CN204167880U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420666521.6U CN204167880U (en) 2014-11-10 2014-11-10 Battery pack overheat protector power supply circuits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420666521.6U CN204167880U (en) 2014-11-10 2014-11-10 Battery pack overheat protector power supply circuits

Publications (1)

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CN204167880U true CN204167880U (en) 2015-02-18

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CN201420666521.6U Withdrawn - After Issue CN204167880U (en) 2014-11-10 2014-11-10 Battery pack overheat protector power supply circuits

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104362595A (en) * 2014-11-10 2015-02-18 深圳市卓能新能源科技有限公司 Battery pack power supply circuit capable of achieving over-temperature protection
CN104505905A (en) * 2015-01-06 2015-04-08 常州先进制造技术研究所 Single-charged and series-discharged lithium battery pack

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104362595A (en) * 2014-11-10 2015-02-18 深圳市卓能新能源科技有限公司 Battery pack power supply circuit capable of achieving over-temperature protection
CN104362595B (en) * 2014-11-10 2017-11-24 深圳市卓能新能源股份有限公司 Battery pack overheat protector power supply circuit
CN104505905A (en) * 2015-01-06 2015-04-08 常州先进制造技术研究所 Single-charged and series-discharged lithium battery pack

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GR01 Patent grant
C56 Change in the name or address of the patentee
CP03 Change of name, title or address

Address after: Longgang District of Shenzhen City, Guangdong province 518117 Ping Street in the community sifangpu village 1 building A 101, 201, 301, building B, building D, building G

Patentee after: SHENZHEN ZHUONENG NEW ENERGY CO., LTD.

Address before: 518000 Shenzhen City, Longgang District, Ping and industrial zone, a phase of the first phase of the United States and the United States, Guangdong, a period of three

Patentee before: Shenzhen Zhuoneng New Energy Technology Co.,Ltd.

AV01 Patent right actively abandoned
AV01 Patent right actively abandoned

Granted publication date: 20150218

Effective date of abandoning: 20171124