CN204029954U - Electric automobile, electric power system and battery heating device - Google Patents
Electric automobile, electric power system and battery heating device Download PDFInfo
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- CN204029954U CN204029954U CN201420424613.3U CN201420424613U CN204029954U CN 204029954 U CN204029954 U CN 204029954U CN 201420424613 U CN201420424613 U CN 201420424613U CN 204029954 U CN204029954 U CN 204029954U
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The utility model discloses a kind of battery heating device, comprising: the first electric capacity; Second electric capacity; First DC source, the first DC source and the first Capacitance parallel connection; Its output voltage is less than the preset security voltage of battery; Second DC source, the second DC source and the second Capacitance parallel connection, its output voltage is greater than the preset security voltage of battery; First switch element and second switch unit, one end of first switch element is connected with the other end of battery, the other end of the first switch element is connected with the other end of the first electric capacity, one end of second switch unit is connected with the other end of battery, the other end of second switch unit is connected with the other end of the second electric capacity, is connected with the first diode between the positive terminal of the second DC source and the other end of described second electric capacity.This battery heating device by the first switch element and second switch unit in turn break-make make inside battery produce high-frequency alternating current, to make battery homogeneous heating.The invention also discloses a kind of electric power system and a kind of electric automobile.
Description
Technical field
The utility model relates to electric vehicle engineering field, particularly a kind of battery heating device, a kind of there is the electric power system of this battery heating device and a kind of electric automobile.
Background technology
Along with the technology of electric automobile is more and more ripe, electric automobile obtains and develops widely.Wherein, electrokinetic cell is as the energy storage carrier of electric automobile, and its performance determines the development of electric automobile, and the electrokinetic cell of current electric automobile is mainly based on lithium battery and ferric phosphate lithium cell.The maximum deficiency of ferric phosphate lithium cell is when low temperature less than-20 DEG C, can only release the 50%-70% of specified electric quantity, needs to heat battery time therefore under battery is in low-temperature condition, just can improve the electricity that battery is released.
The current heating to ferric phosphate lithium cell is mainly by carrying out high current charge-discharge to ferric phosphate lithium cell, and utilizing the internal resistance of battery own to generate heat when galvanization, heated by heat transfer to battery, is namely utilize the electricity of battery itself to heat self.But, when adopting which to heating of battery, the heating of whole heating system can be caused serious, easily cause heating of battery uneven, make battery occur cause thermal damage.
In correlation technique, when utilizing the internal resistance of battery own to generate heat when galvanization to heat battery, as shown in Figure 1, the operation principle of this heating of battery system is heating of battery system:
First open IGBT1, battery is charged to electric capacity C, and wherein current direction as shown in Figure 2.Due to the existence of stray inductance ESL in battery, the voltage of voltage higher than battery of electric capacity C after charging can be made.After in ESL, electric current drops to 0, electric capacity C is charged by diode pair battery in IGBT1, and in battery, current direction as shown in Figure 3, and IGBT1 turns off during this period.Then after battery completes charging to electric capacity C, open IGBT2, utilize inductance L, the voltage on electric capacity C is made to carry out the upset of polarity, current direction as shown in Figure 4, after the polarity of voltage on electric capacity C has overturn, has opened IGBT1 again, enter next circulation, thus realize inside battery dead resistance ESR and generate heat to realize heating of battery when galvanization.
But inventor finds when studying, when heating of battery, the electric current flowing through IGBT and electric capacity C is larger, make the heating of whole heating system serious, and the alternation big current produced in heating of battery work, cause current noise very greatly and externally can produce very large magnetic radiation.Electric capacity C two ends are large ripple currents always simultaneously, electric capacity C are generated heat very serious.In addition, the operating current of heating system can become large along with the rising of battery temperature, this is because the characteristic of battery itself causes, ferric phosphate lithium cell, when low temperature, reduces because inner ion is active, the internal resistance of cell is caused to increase, after battery temperature rises, ion activity strengthens, and internal resistance diminishes, and internal resistance diminishes system works ER effect can be caused large, there is certain potential safety hazard.
For solving the problems of the technologies described above, first object of the present utility model is to propose a kind of battery heating device, utilize first, second DC source, the alternating current successively opening to make the inside of battery to produce high frequency by controlling the first switch element and second switch unit realizes heating of battery, make heating of battery even, and because the operating current in heating of battery process is little, can current noise be reduced.
Second object of the present utility model is to propose a kind of electric power system.3rd object of the present utility model is to propose a kind of electric automobile.
For achieving the above object, a kind of battery heating device that the utility model proposes on the one hand, comprising: the first electric capacity, described one end of first electric capacity is connected with one end of battery, second electric capacity, one end of described second electric capacity is connected with one end of described battery, first DC source, described first DC source and described first Capacitance parallel connection, the output voltage of described first DC source is less than the preset security voltage of battery, second DC source, described second DC source and described second Capacitance parallel connection, the output voltage of described second DC source is greater than the preset security voltage of described battery, first switch element and second switch unit, one end of described first switch element is connected with the other end of described battery, the other end of described first switch element is connected with the other end of described first electric capacity, one end of described second switch unit is connected with the other end of described battery, the other end of described second switch unit is connected with the other end of described second electric capacity, the first diode is connected with between the positive terminal of described second DC source and the other end of described second electric capacity, the anode of described first diode is connected with the positive terminal of described second DC source, the negative electrode of described first diode is connected with the other end of described second electric capacity.Wherein, successively open to make the inside of described battery to produce the alternating current of high frequency, to heat described battery by controlling described first switch element and second switch unit.
According to battery heating device of the present utility model, first, second DC source is utilized to stablize the minimum voltage of the first electric capacity and the minimum voltage of the second electric capacity respectively, the alternating current successively opening to make the inside of battery to produce high frequency by controlling the first switch element and second switch unit realizes heating of battery, making heating of battery even, avoiding battery to damage because heating uneven.And, by regulating the voltage of the first electric capacity and the second electric capacity to regulate the operating current of whole heater, realize operating current adjustable, unlikely operating current is very large, thus make there is no big current in heating of battery process, current noise is little, and the first diode can ensure that cell safety reliably heats.
Wherein, described first switch element comprises the first bipolar junction transistor BJT and the first fly-wheel diode, described second switch unit comprises the 2nd BJT and the second fly-wheel diode, wherein, the collector electrode of a described BJT is connected with the other end of described battery with the negative electrode of described first fly-wheel diode respectively, the emitter of a described BJT is connected with the other end of described first electric capacity with the anode of described first fly-wheel diode respectively, the emitter of described 2nd BJT is connected with the other end of described battery with the anode of described second fly-wheel diode respectively, the collector electrode of described 2nd BJT is connected with the other end of described second electric capacity with the negative electrode of described second fly-wheel diode respectively.
Preferably, described first electric capacity and the second electric capacity can be plastic film electric capacity.Particularly, the switching frequency of a described BJT and described 2nd BJT is more than or equal to 1MHZ.
Particularly, described battery is ferric phosphate lithium cell.
For achieving the above object, a kind of electric power system that another aspect of the present utility model proposes, comprising: battery; Above-mentioned battery heating device; First gate-controlled switch, described first gate-controlled switch and described battery heating device are connected afterwards and described cell parallel; Second gate-controlled switch, with described cell parallel after described second gate-controlled switch and load in series; Wherein, when described first gate-controlled switch is closed and described second gate-controlled switch disconnects, described battery heating device carries out work and heats to make described battery, and when described first gate-controlled switch disconnects and described second gate-controlled switch closes, described load supplying given by described battery.
According to electric power system of the present utility model, when battery heating device heats battery, utilize first, second DC source stablizes the minimum voltage of the first electric capacity and the minimum voltage of the second electric capacity respectively, the alternating current successively opening to make the inside of battery to produce high frequency by controlling the first switch element and second switch unit realizes heating of battery, make heating of battery even, battery is avoided to damage because heating uneven, and, by regulating the voltage of the first electric capacity and the second electric capacity to regulate the operating current of whole heater, realize operating current adjustable, unlikely operating current is very large, thus make there is no big current in heating of battery process, current noise is little, can ensure that cell safety reliably heats.
Wherein, described first gate-controlled switch and described second gate-controlled switch are relay.
In addition, the utility model also proposed a kind of electric automobile, and it comprises above-mentioned electric power system.
When this electric automobile is heated battery by the battery heating device in electric power system, the alternating current that the inside of battery can be made to produce high frequency realizes heating of battery, thus make heating of battery even, avoid battery to damage because heating uneven, and the operating current that can realize battery heating device is adjustable, unlikely operating current is very large, thus making there is no big current in heating of battery process, current noise is little, can ensure that cell safety reliably heats.
The aspect that the utility model is additional and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present utility model.
Summary of the invention
The utility model is made the understanding of following problem and research based on inventor:
Accompanying drawing explanation
The utility model above-mentioned and/or additional aspect and advantage will become obvious and easy understand from the following description of the accompanying drawings of embodiments, wherein:
Fig. 1 is the circuit diagram of heating of battery system in correlation technique;
Fig. 2 is the current direction schematic diagram that in correlation technique, battery charges to electric capacity C;
Fig. 3 is current direction schematic diagram in battery when charging to battery in correlation technique;
Fig. 4 is voltage in correlation technique on electric capacity C current direction schematic diagram when carrying out the upset of polarity;
Fig. 5 is the circuit diagram of the battery heating device according to the utility model embodiment;
Fig. 6 is the current direction schematic diagram of battery heating device in the course of work 1 according to the utility model embodiment;
Fig. 7 is the current direction schematic diagram of battery heating device in the course of work 2 according to the utility model embodiment;
Fig. 8 flows through the approximate current oscillogram of battery when being the battery heating device work according to the utility model embodiment;
Fig. 9 is the current direction schematic diagram of battery heating device in the course of work 3 according to the utility model embodiment;
Figure 10 is the current direction schematic diagram of battery heating device in the course of work 4 according to the utility model embodiment;
Figure 11 is the current direction schematic diagram of battery heating device in the course of work 5 according to the utility model embodiment; And
Figure 12 is the block diagram of the electric power system according to the utility model embodiment.
Embodiment
Be described below in detail embodiment of the present utility model, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the utility model, and can not being interpreted as restriction of the present utility model.
Disclosing hereafter provides many different embodiments or example is used for realizing different structure of the present utility model.Of the present utility model open in order to simplify, hereinafter the parts of specific examples and setting are described.Certainly, they are only example, and object does not lie in restriction the utility model.In addition, the utility model can in different example repeat reference numerals and/or letter.This repetition is to simplify and clearly object, itself does not indicate the relation between discussed various embodiment and/or setting.In addition, the various specific technique that the utility model provides and the example of material, but those of ordinary skill in the art can recognize the property of can be applicable to of other techniques and/or the use of other materials.In addition, fisrt feature described below second feature it " on " structure can comprise the embodiment that the first and second features are formed as directly contact, also can comprise other feature and be formed in embodiment between the first and second features, such first and second features may not be direct contacts.
In description of the present utility model, it should be noted that, unless otherwise prescribed and limit, term " installation ", " being connected ", " connection " should be interpreted broadly, such as, can be mechanical connection or electrical connection, also can be the connection of two element internals, can be directly be connected, also indirectly can be connected by intermediary, for the ordinary skill in the art, the concrete meaning of above-mentioned term can be understood as the case may be.
Describe the battery heating device according to the proposition of the utility model embodiment with reference to the accompanying drawings, there is the electric power system of this battery heating device and there is the electric automobile of this electric power system.
Fig. 5 is the circuit diagram of the battery heating device according to the utility model embodiment.As shown in Figure 5, this battery heating device comprises the first electric capacity C1, the second electric capacity C2, the first DC source DC1, the second DC source DC2, the first switch element 10 and second switch unit 20, first diode D4.
Wherein, one end of the first electric capacity C1 is connected with one end of battery 100, and one end of the second electric capacity C2 is connected with one end of battery 100.Between the positive terminal and the other end of the second electric capacity C2 of the second DC source DC2, be connected with the first diode D4, the anode of the first diode D4 is connected with the positive terminal of the second DC source DC2, and the negative electrode of the first diode D4 is connected with the other end of the second electric capacity C2.First diode D4 can prevent from damaging high voltage direct current source DC1 and DC2 from the high pressure in battery.According to an embodiment of the present utility model, first electric capacity C1 and the second electric capacity C2 can be plastic film electric capacity, because plastic film electric capacity is nonpolarity, insulation impedance is high, dielectric loss is little, therefore, the first electric capacity and the second electric capacity adopt plastic film electric capacity, and in heating of battery process, caloric value is less.Further, battery can be ferric phosphate lithium cell.
First DC source DC1 is in parallel with the first electric capacity C1, the output voltage of the first DC source DC1 is less than the preset security voltage of battery and the minimum safe voltage of battery, second DC source DC2 is in parallel with the second electric capacity C2, and the output voltage of the second DC source DC2 is greater than the preset security voltage of described battery.Further, the first DC source DC1 and the second DC source DC2 is high voltage direct current source, and the major function of the first DC source DC1 stablizes the minimum voltage on the first electric capacity C1; The major function of the second DC source DC2 stablizes the minimum voltage on the second electric capacity C2, also can charge to battery 100 simultaneously.
As shown in Figure 5, one end of first switch element 10 is connected with the other end of battery 100, the other end of the first switch element 10 is connected with the other end of the first electric capacity C1, one end of second switch unit 20 is connected with the other end of battery 100, the other end of second switch unit 20 is connected with the other end of the second electric capacity C2, wherein, successively open to make the inside of described battery to produce the alternating current of high frequency, to heat described battery by controlling the first switch element 10 and second switch unit 20.
Particularly, according to an embodiment of the present utility model, as shown in Figure 5, first switch element 10 comprises a BJT1 (Bipolar Junction Transistor, bipolar junction transistor) and the first sustained diode 1, second switch unit 20 comprises the 2nd BJT2 and the second sustained diode 2, the collector electrode of the one BJT is connected with the other end of battery with the negative electrode of the first sustained diode 1 respectively, the emitter of the one BJT is connected with the other end of the first electric capacity C1 with the anode of the first sustained diode 1 respectively, the emitter of the 2nd BJT is connected with the other end of described battery with the anode of the second sustained diode 2 respectively, the collector electrode of the 2nd BJT is connected with the other end of the second electric capacity C2 with the negative electrode of the second sustained diode 2 respectively.Wherein, a BJT1 and the 2nd BJT2 forms half-bridge circuit, and in circuit, the requirements of type selecting of a BJT1 and the 2nd BJT2 is high pressure resistant, and peak current can be 15A, and switching frequency is more than or equal to 1MHZ.
Further, the major function of BJT1 controls battery 100 to the charging of the first electric capacity C1, the i.e. discharge process of battery, and the major function of BJT2 controls high voltage direct current source DC2 and the second electric capacity C2 to the charging of battery; Sustained diode 1 major function is, have no progeny when BJT2 closes, provide the continuous current circuit of electric current in battery, afterflow diode D3 major function is, has no progeny, provide the continuous current circuit of electric current in battery when BJT1 closes.
In a preferred embodiment of the present utility model, as shown in Figure 5, the second diode D3 is connected with between the positive terminal and the other end of the first electric capacity C1 of the first DC source DC1, the anode of the second diode D3 is connected with the positive terminal of the first DC source DC1, and the negative electrode of the second diode D3 is connected with the other end of the first electric capacity C1 the first diode first diode first diode.Wherein, the major function of diode D3 is, prevents from damaging high voltage direct current source DC1 and DC2 from the high pressure in battery.
In embodiment of the present utility model, the operation principle of above-mentioned battery heating device utilizes electric current in the stray inductance ESL of inside battery can not suddenly change to realize, and its course of work is as follows:
When 1, starting battery heating device, be first that high voltage direct current source DC1 and DC2 charges to electric capacity C1 and C2, in this process, current direction as shown in Figure 6, is conducive to the size of electric current when control BJT1 and BJT2 opens.By the voltage at control capacittance C1 and C2 two ends, just can the operating current of regulating cell heater, therefore, the operating current of the battery heating device of the utility model embodiment is adjustable, so operating current is unlikely very large.
When 2, starting heating of battery, first open BJT1, because electric capacity C1 both end voltage is lower than the voltage of battery, battery 100 couples of electric capacity C1 charge, and electric current flows through BJT1.Due to the existence of stray inductance ESL in battery, electric current is that certain slope rises, and in this process, direction of current flow as shown in Figure 7, and current waveform is as shown in Fig. 8 bend 1.
3, when reaching BJT1 turn-off time, because inside battery stray inductance ESL is not 0, in stray inductance ESL, electric current carries out afterflow by the second sustained diode 2, and in circuit, current direction as shown in Figure 9, and current waveform is as shown in Fig. 8 bend 2.
4, when arriving BJT2 and opening, because the second electric capacity C2 both end voltage is higher than the voltage of battery, high-voltage DC power supply DC2 and electric capacity C2 charges to battery simultaneously, and electric current flows through BJT2.In this process, current direction as shown in Figure 10, and current waveform is as shown in Fig. 8 bend 3.
5, when reaching the turn-off time of BJT2, because electric current in stray inductance ESL is not 0, in stray inductance ESL, electric current carries out afterflow by the first sustained diode 1.Current direction as shown in figure 11 in the process, and current waveform is as shown in Fig. 8 bend 4.
In the process of heating of battery, the course of work of the battery heating device of the utility model embodiment is mainly cycled to repeat this Four processes of 2-5, realizes heating of battery.
In sum, the battery heating device of the utility model embodiment utilizes the first DC source and the second DC source, by control BJT1, BJT2 turn on and off control the discharge and recharge frequency to battery, with the alternating current making inside battery produce high frequency, from but inside battery produces eddy current and generating heat, heating part is more even, makes battery homogeneous heating.
According to the battery heating device of the utility model embodiment, first, second DC source is utilized to stablize the minimum voltage of the first electric capacity and the minimum voltage of the second electric capacity respectively, the alternating current successively opening to make the inside of battery to produce high frequency by controlling the first switch element and second switch unit realizes heating of battery, making heating of battery even, avoiding battery to damage because heating uneven.Further, by regulating the voltage of the first electric capacity and the second electric capacity to regulate the operating current of whole heater, operating current is realized adjustable, unlikely operating current is very large, thus making there is no big current in heating of battery process, current noise is little, can ensure that cell safety reliably heats.
Figure 12 is the block diagram of the electric power system according to the utility model embodiment.As shown in figure 12, this electric power system comprises battery 100, battery heating device 200, first gate-controlled switch K1 and the second gate-controlled switch K2.
Wherein, the first gate-controlled switch K1 and battery heating device 200 are in parallel with battery 100 after connecting, in parallel with battery 100 after the second gate-controlled switch K2 connects with load 300.Wherein, when the first gate-controlled switch K1 is closed and the second gate-controlled switch K2 disconnects, battery heating device 200 carries out work and heats to make battery 100, and when the first gate-controlled switch K1 disconnects and the second gate-controlled switch K2 closes, battery 100 powers to load 300.
According to an embodiment of the present utility model, the first gate-controlled switch K1 and the second gate-controlled switch K2 can be relay.
That is, in embodiment of the present utility model, when battery heating device 200 works, need to disconnect the load of battery 100 rear end and namely disconnect the second gate-controlled switch K2, to reduce in load capacitive load to the impact of battery heating device.Namely say, when battery heating device 200 works, the second gate-controlled switch K2 disconnects, and the first gate-controlled switch K1 closes.When battery temperature reaches set point, battery heating device quits work, and the first gate-controlled switch K1 disconnects, and after the second gate-controlled switch K2 is closed, battery 100 powers to backend load 300.
According to the electric power system of the utility model embodiment, when battery heating device heats battery, utilize first, second DC source stablizes the minimum voltage of the first electric capacity and the minimum voltage of the second electric capacity respectively, the alternating current successively opening to make the inside of battery to produce high frequency by controlling the first switch element and second switch unit realizes heating of battery, make heating of battery even, battery is avoided to damage because heating uneven, and, by regulating the voltage of the first electric capacity and the second electric capacity to regulate the operating current of whole heater, realize operating current adjustable, unlikely operating current is very large, thus make there is no big current in heating of battery process, current noise is little, can ensure that cell safety reliably heats.
In addition, the utility model embodiment also proposed a kind of electric automobile, and it comprises above-mentioned electric power system.
When this electric automobile is heated battery by the battery heating device in electric power system, the alternating current that the inside of battery can be made to produce high frequency realizes heating of battery, thus make heating of battery even, avoid battery to damage because heating uneven, and the operating current that can realize battery heating device is adjustable, unlikely operating current is very large, thus making there is no big current in heating of battery process, current noise is little, can ensure that cell safety reliably heats.
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present utility model or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
Although illustrate and described embodiment of the present utility model, for the ordinary skill in the art, be appreciated that and can carry out multiple change, amendment, replacement and modification to these embodiments when not departing from principle of the present utility model and spirit, scope of the present utility model is by claims and equivalency thereof.
Claims (9)
1. a battery heating device, is characterized in that, comprising:
First electric capacity, described one end of first electric capacity is connected with one end of battery;
Second electric capacity, one end of described second electric capacity is connected with one end of described battery;
First DC source, described first DC source and described first Capacitance parallel connection, the output voltage of described first DC source is less than the preset security voltage of described battery;
Second DC source, described second DC source and described second Capacitance parallel connection, the output voltage of described second DC source is greater than the preset security voltage of described battery;
First switch element and second switch unit, one end of described first switch element is connected with the other end of described battery, the other end of described first switch element is connected with the other end of described first electric capacity, one end of described second switch unit is connected with the other end of described battery, the other end of described second switch unit is connected with the other end of described second electric capacity, wherein, successively open to make the inside of described battery to produce the alternating current of high frequency, to heat described battery by controlling described first switch element and second switch unit;
The first diode is connected with between the positive terminal of described second DC source and the other end of described second electric capacity, the anode of described first diode is connected with the positive terminal of described second DC source, and the negative electrode of described first diode is connected with the other end of described second electric capacity.
2. battery heating device as claimed in claim 1, it is characterized in that, described first switch element comprises the first bipolar junction transistor BJT and the first fly-wheel diode, described second switch unit comprises the 2nd BJT and the second fly-wheel diode, wherein, the collector electrode of a described BJT is connected with the other end of described battery with the negative electrode of described first fly-wheel diode respectively, the emitter of a described BJT is connected with the other end of described first electric capacity with the anode of described first fly-wheel diode respectively, the emitter of described 2nd BJT is connected with the other end of described battery with the anode of described second fly-wheel diode respectively, the collector electrode of described 2nd BJT is connected with the other end of described second electric capacity with the negative electrode of described second fly-wheel diode respectively.
3. battery heating device as claimed in claim 1, it is characterized in that, described first electric capacity is plastic film electric capacity.
4. battery heating device as claimed in claim 1, it is characterized in that, described second electric capacity is plastic film electric capacity.
5. battery heating device as claimed in claim 2, it is characterized in that, the switching frequency of a described BJT and described 2nd BJT is all more than or equal to 1MHZ.
6. the battery heating device according to any one of claim 1-5, is characterized in that, described battery is ferric phosphate lithium cell.
7. an electric power system, is characterized in that, comprising:
Battery;
Battery heating device according to any one of claim 1-6;
First gate-controlled switch, described first gate-controlled switch and described battery heating device are connected afterwards and described cell parallel;
Second gate-controlled switch, with described cell parallel after described second gate-controlled switch and load in series;
Wherein, when described first gate-controlled switch is closed and described second gate-controlled switch disconnects, described battery heating device carries out work and heats to make described battery, and when described first gate-controlled switch disconnects and described second gate-controlled switch closes, described load supplying given by described battery.
8. electric power system as claimed in claim 7, it is characterized in that, described first gate-controlled switch and described second gate-controlled switch are relay.
9. an electric automobile, is characterized in that, comprises electric power system as claimed in claim 7 or 8.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420424613.3U CN204029954U (en) | 2014-07-30 | 2014-07-30 | Electric automobile, electric power system and battery heating device |
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| CN201420424613.3U CN204029954U (en) | 2014-07-30 | 2014-07-30 | Electric automobile, electric power system and battery heating device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105186634A (en) * | 2015-10-26 | 2015-12-23 | 维沃移动通信有限公司 | Charging circuit and mobile terminal |
| CN106376104A (en) * | 2016-09-07 | 2017-02-01 | 合肥工业大学智能制造技术研究院 | Battery self-discharge heating circuit |
| CN107634286A (en) * | 2017-09-21 | 2018-01-26 | 北京卫蓝新能源科技有限公司 | A kind of battery DC/exchange heater and method |
| CN109130816A (en) * | 2018-07-25 | 2019-01-04 | 睿驰智能汽车（广州）有限公司 | Battery heating device and electric car |
| WO2019223315A1 (en) * | 2018-05-22 | 2019-11-28 | 宁德时代新能源科技股份有限公司 | Battery pack heater and control method for dual-vehicle heating |
| CN110544808A (en) * | 2018-05-28 | 2019-12-06 | 大众汽车有限公司 | Vehicle electrical system, driving device and circuit for heating a battery |
| CN113206324A (en) * | 2021-04-16 | 2021-08-03 | 重庆长安新能源汽车科技有限公司 | Power battery heating noise optimization method and device |
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2014
- 2014-07-30 CN CN201420424613.3U patent/CN204029954U/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105186634A (en) * | 2015-10-26 | 2015-12-23 | 维沃移动通信有限公司 | Charging circuit and mobile terminal |
| CN106376104A (en) * | 2016-09-07 | 2017-02-01 | 合肥工业大学智能制造技术研究院 | Battery self-discharge heating circuit |
| CN106376104B (en) * | 2016-09-07 | 2020-12-08 | 合肥工业大学智能制造技术研究院 | Battery self-discharge heating circuit |
| CN107634286A (en) * | 2017-09-21 | 2018-01-26 | 北京卫蓝新能源科技有限公司 | A kind of battery DC/exchange heater and method |
| WO2019223315A1 (en) * | 2018-05-22 | 2019-11-28 | 宁德时代新能源科技股份有限公司 | Battery pack heater and control method for dual-vehicle heating |
| US11139514B2 (en) | 2018-05-22 | 2021-10-05 | Contemporary Amperex Technology Co., Limited | Battery pack heating apparatus for double vehicle heating and control method |
| CN110544808A (en) * | 2018-05-28 | 2019-12-06 | 大众汽车有限公司 | Vehicle electrical system, driving device and circuit for heating a battery |
| CN109130816A (en) * | 2018-07-25 | 2019-01-04 | 睿驰智能汽车（广州）有限公司 | Battery heating device and electric car |
| CN113206324A (en) * | 2021-04-16 | 2021-08-03 | 重庆长安新能源汽车科技有限公司 | Power battery heating noise optimization method and device |
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