CN203660493U - Overcurrent protection device and overcurrent protection control equipment - Google Patents

Overcurrent protection device and overcurrent protection control equipment Download PDF

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CN203660493U
CN203660493U CN201320845047.9U CN201320845047U CN203660493U CN 203660493 U CN203660493 U CN 203660493U CN 201320845047 U CN201320845047 U CN 201320845047U CN 203660493 U CN203660493 U CN 203660493U
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output
resistance
over
level signal
module
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闫永亮
王野
张君鸿
黎刚
赵倩
王春凤
赵海
潘宇
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Beijing Treasure Car Co Ltd
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Beiqi Foton Motor Co Ltd
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Abstract

The utility model discloses overcurrent protective devices and overcurrent protection to control equipment, which includes over-current detection module, detects the electric current of electric machine controller; Window delay circuit, including the input pin of IC module, capacitor C1, resistance R5, resistance R6, IC module Connect the output end of over-current detection module, the input pin of IC module And input pin B, by resistance R5 connection power supply, for the input pin RX of IC module by resistance R6 connection power supply, the input pin CX of IC module passes through capacitor C1 connection input pin RX; Over-current signal output circuit, the output pin Q of the input pin A1 connection IC module of over-current signal output circuit, the output end of the input pin B1 connection over-current detection module of over-current signal output circuit. According to the level signal that over-current signal output circuit exports, determine whether electric machine controller needs to carry out overcurrent protection operation, to reduce overcurrent protection maloperation caused by temporary over-current.

Description

Overcurrent protective device and overcurrent protection control appliance
Technical field
The utility model relates to Motor Control Field, relates in particular to a kind of overcurrent protective device and overcurrent protection control appliance.
Background technology
Electric automobile is the main direction of contemporary development of automobile, and power drive system is the heart of electric automobile, is that the driveability that improves electric automobile guarantees.
Electric machine controller is the critical component of power drive system, and electric machine controller over current fault is one of common fault, for controller can normally be worked, need to carry out overcurrent protection to electric machine controller.
Electric automobile is anxious to accelerate or travels in the more complicated road conditions of electromagnetic environment, and the large electric current of moment often appears in electric machine controller, because lasting moment is extremely short, can't cause damage to electric machine controller.But, because the overcurrent protective device of electric machine controller is sensitive higher, even if electric machine controller moment overcurrent also can carry out overcurrent protection, cause overcurrent protection misoperation.
Utility model content
The overcurrent protective device that the utility model embodiment provides and overcurrent protection control appliance, can reduce the moment overcurrent protection misoperation that causes of overcurrent.
In order to solve the problems of the technologies described above, the utility model embodiment adopts following technical scheme:
A kind of overcurrent protective device, comprising:
Over-current detection module, the electric current of detection electric machine controller, if not overcurrent of described electric machine controller, the output output high level signal of described over-current detection module, if described electric machine controller overcurrent, the output output low level signal of over-current detection module;
Window delay circuit, connects the output of described over-current detection module, if the output high level signal of described over-current detection module output, the output output low level signal of described window delay circuit; If the output of the output of described over-current detection module becomes low level signal from high level signal, the output of window delay circuit output direct impulse signal;
Over-current signal output circuit, connect the output of described over-current detection module and connect the output of described window delay circuit, if the output output low level signal of the output output low level signal of described over-current detection module and described window delay circuit, the output output low level signal of described over-current signal output circuit.
Described window delay circuit comprises IC module, capacitor C 1, resistance R 5, resistance R 6, the input pin of described IC module
Figure BDA0000441845580000021
connect the output of described over-current detection module, the input pin of described IC module
Figure BDA0000441845580000022
and input pin B is by described resistance R 5connect power supply, the input pin R of described IC module xby described resistance R 6connect power supply, the input pin C of described IC module xby described capacitor C 1connect input pin R x.
Optionally, the input pin A of described over-current signal output circuit 1connect the output pin Q of described IC module, the input pin B of described over-current signal output circuit 1connect the output of described over-current detection module.
Optionally, described over-current detection module, comprising:
Cross flow point circuit is set, comprise the resistance R connecting successively 1, resistance R 2, resistance R 3;
Current sensor, the electric current of Control of Induction Motors device is exported corresponding voltage;
Overcurrent comparison circuit, comprises the first comparator, the second comparator;
The positive input of described the first comparator is connected in described resistance R 1, described resistance R 2between, the reverse input end of described the first comparator connects described current sensor; The positive input of described the second comparator is connected in described resistance R 2, described resistance R 3between, the reverse input end of described the second comparator connects described current sensor; The output of described the first comparator connects the output of described the second comparator, and connects the output of described overcurrent comparison circuit;
Wherein, in the output of the output of described the first comparator, described the second comparator when at least one output low level signal, the output output low level signal of described overcurrent comparison circuit; When the output of described the first comparator, the output of described the second comparator are all exported high level signal, the output output high level signal of described overcurrent comparison circuit.
Optionally, described resistance R 1tail end connect described resistance R 2head end, described resistance R 2tail end connect described resistance R 3head end, described resistance R 1head end connect power supply, described resistance R 3tail end ground connection.
Optionally, described resistance R 1resistance and described resistance R 3resistance identical.
Optionally, the duration of the direct impulse signal of the output pin Q output of described IC module is definite according to T=0.45 × R × C, and wherein, T is that duration, unit are seconds, and C is capacitor C 1capacitance, unit be farad, R is resistance R 6resistance value, unit be ohm.
Optionally, also comprise resistance R 4, the output of described over-current detection module is by described resistance R 4connect power supply.
A kind of overcurrent protection control appliance, comprises overcurrent protective device as above-mentioned in claim.
Optionally, also comprise: control module, the output pin Y of over-current signal output circuit in described control module and described overcurrent protective device 1connect, detect the output pin Y of described over-current signal output circuit 1the level signal of output, in the time of described overcurrent protective device output low level signal, carries out overcurrent protection to electric machine controller.
Based on technique scheme, the overcurrent protective device of the utility model embodiment and overcurrent protection control appliance, by the over-current detection module, window delay circuit, the over-current signal output circuit that are connected, to whether realize overcurrent protection operation and be converted to level signal output, in the time of the output output low level signal of overcurrent signal output apparatus, judge that electric machine controller need to carry out overcurrent protection operation; In the time that the output of overcurrent signal output apparatus is exported high level signal, judge that electric machine controller does not need to carry out overcurrent protection operation, thus the overcurrent protection misoperation that minimizing moment overcurrent causes.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is embodiment more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
One of structural representation of the overcurrent protective device that Fig. 1 provides for the utility model embodiment 1;
Two of the structural representation of the overcurrent protective device that Fig. 2 provides for the utility model embodiment 1;
One of signal schematic representation that Fig. 3 a provides for the utility model embodiment 2;
Two of the signal schematic representation that Fig. 3 b provides for the utility model embodiment 2;
The structural representation of the overcurrent protection control appliance that Fig. 4 provides for the utility model embodiment 3.
Embodiment
For making object, technical scheme and the advantage of the utility model embodiment clearer, below in conjunction with the accompanying drawing in the utility model embodiment, technical scheme in the utility model embodiment is clearly described, obviously, described embodiment is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the utility model protection.
Embodiment 1
As shown in Figure 1, the present embodiment provides a kind of overcurrent protective device, comprising: over-current detection module 11, window delay circuit 12, over-current signal output circuit 13, wherein:
Over-current detection module 11, detect the electric current of electric machine controller, if not overcurrent of described electric machine controller, the output output high level signal of described over-current detection module, if described electric machine controller overcurrent, the output output low level signal of over-current detection module.
Window delay circuit 12, connects the output of described over-current detection module 11, if the output high level signal that described over-current detection module 11 is exported, the output output low level signal of described window delay circuit 12; If the output of the output of described over-current detection module 11 becomes low level signal from high level signal, the output of window delay circuit 12 output direct impulse signal.
Over-current signal output circuit 13, connect the output of described over-current detection module 11 and connect the output of described window delay circuit 12, if the output output low level signal of the output output low level signal of described over-current detection module 11 and described window delay circuit, the output output low level signal of described over-current signal output circuit 13.Otherwise, the output output high level signal of described over-current signal output circuit 13.
Wherein, when the output output low level signal of over-current signal output circuit 13, judge that electric machine controller need to carry out overcurrent protection operation; In the time that the output of overcurrent signal output apparatus is exported high level signal, judge that electric machine controller does not need to carry out overcurrent protection operation.
In the present embodiment, over-current detection module 11 detects the electric current of electric machine controller, and electric machine controller is not exported high level signal, output low level signal when electric machine controller overcurrent when overcurrent.In the present embodiment, over-current detection module 11 can adopt multiple circuit structure, can electric machine controller export high level signal, output low level signal when electric machine controller overcurrent when overcurrent.
Optionally, window delay circuit 12 comprises IC module, capacitor C 1, resistance R 5, resistance R 6, the input pin of IC module connect the output of over-current detection module, the input pin of IC module
Figure BDA0000441845580000052
and input pin B passes through resistance R 5connect power supply, the input pin R of IC module xpass through resistance R 6connect power supply, the input pin C of IC module xpass through capacitor C 1connect input pin R x.
Wherein, input pin
Figure BDA0000441845580000053
input high level signal and input pin
Figure BDA0000441845580000054
when input high level signal and input pin B input high level signal, the output pin Q output low level signal of IC module, input pin
Figure BDA0000441845580000055
input when high level signal becomes low level signal, a direct impulse signal of output pin Q output of IC module.In the present embodiment, in different application scenarioss, the duration of the direct impulse signal of output pin Q output can be different.
Optionally, the input pin A of over-current signal output circuit 13 1connect the output pin Q of IC module, the input pin B of over-current signal output circuit 1connect the output of over-current detection module.Wherein, over-current signal output circuit 13 is for the OR circuit of two-way input, as input pin B 1input low level signal and pin A 1when input low level signal, the output pin Y of over-current signal output circuit 1output low level signal; When not meeting input pin B 1input low level signal and pin A 1when input low level signal, the output pin Y of over-current signal output circuit 1output high level signal.
In the present embodiment, as the output pin Y of overcurrent signal output apparatus 1when output low level signal, can judge that electric machine controller need to carry out overcurrent protection operation; As the output pin Y of overcurrent signal output apparatus 1when output high level signal, can judge that electric machine controller does not need to carry out overcurrent protection operation.
In the present embodiment, optional, as shown in Figure 2, over-current detection module 11, comprising:
Cross flow point circuit 111 is set, comprise the resistance R connecting successively 1, resistance R 2, resistance R 3.
Current sensor 112, the electric current of Control of Induction Motors device is exported corresponding voltage.For example, current sensor 112 can be a Hall element, and its output voltage and the electric current by himself are directly proportional, and output voltage is Vout.
Overcurrent comparison circuit 113, comprises the first comparator 1131, the second comparator 1132.
The positive input of the first comparator 1131 is connected in resistance R 1, resistance R 2between tie point OC_H(be forward over-current protection point), the reverse input end of the first comparator 1131 connects current sensor; The positive input of the second comparator 1132 is connected in resistance R 2, resistance R 3between tie point OC_L(be reverse overcurrent protection point), the reverse input end of the second comparator 1132 connects current sensor 112; The output of the first comparator 1131 connects the output of the second comparator 1132, and connects the output of overcurrent comparison circuit 113.Wherein, overcurrent comparison circuit 113 is AND circuit, in the output of the first comparator 1131, the output of the second comparator 1132 when at least one output low level signal, and the output output low level signal of overcurrent comparison circuit; When the output of the first comparator, the output of the second comparator are all exported high level signal, the output output high level signal of overcurrent comparison circuit.
In the present embodiment, optional, as shown in Figure 2, resistance R 1tail end contact resistance R 2head end, resistance R 2tail end contact resistance R 3head end, resistance R 1head end connect power supply, resistance R 3tail end ground connection.
In the present embodiment, optional, as shown in Figure 2, resistance R 1resistance and resistance R 3resistance identical.
In the present embodiment, optional, as shown in Figure 2, the duration of the direct impulse signal of the output pin Q output of IC module is definite according to T=0.45 × R × C, and wherein, T is that duration, unit are seconds, and C is capacitor C 1capacitance, unit be farad, R is resistance R 6resistance value, unit be ohm.
In the present embodiment, optional, as shown in Figure 2, also comprise resistance R 4, the output of over-current detection module passes through resistance R 4connect power supply.
Power supply in the present embodiment is the power supply to circuit, and for example this power supply can be 5V DC power supply.
Whether the overcurrent protective device of Ben Fashi example, by the over-current detection module, window delay circuit, the over-current signal output circuit that are connected, will realize overcurrent protection operation and be converted to level signal output, as the output pin Y of overcurrent signal output apparatus 1when output low level signal, judge that electric machine controller need to carry out overcurrent protection operation; As the output pin Y of overcurrent signal output apparatus 1when output high level signal, judge that electric machine controller does not need to carry out overcurrent protection operation, thus the overcurrent protection misoperation that minimizing moment overcurrent causes.
Embodiment 2
The present embodiment describes the overcurrent protective device shown in Fig. 2 in detail.Fig. 2 comprises over-current detection module 11, window delay circuit 12, over-current signal output circuit 13, and over-current detection module 11 comprised that flow point arranged circuit 111, current sensor 112, overcurrent comparison circuit 113.
Cross flow point and circuit 111 is set is made up of divider resistance R1, R2, R3, wherein resistance R 1 and R3 parameter (for example resistance) are identical, and dividing point is respectively OC_H and OC_L, and wherein OC_H is forward over-current protection point, and OC_L is reverse overcurrent protection point.
Current sensor 112 is a Hall element, the electric current of Control of Induction Motors device, the magnitude of voltage that current sensor 112 is exported and autonomous induction to current value be directly proportional, sense that the electric current of electric machine controller is larger, the magnitude of voltage of output is larger.The Voltage-output terminal of current sensor 112 is Vout.
Overcurrent comparison circuit 113 is made up of two-way comparator (the first comparator 1131, the second comparator 1132), the positive input of two-way comparator meets respectively forward over-current protection point OC_H and reverse overcurrent protection point OC_L, and the reverse input end of two-way comparator is connected with the output end vo ut of current sensor; The output of two-way comparator connect and by resistance R 4 to drawing on power supply.
Window delay circuit 12 is by IC module I C 1, capacitor C 1, resistance R 5, resistance R 6composition, wherein input pin B and input pin
Figure BDA0000441845580000071
link together and pass through resistance R 5to drawing on power supply, input pin Cx connects capacitor C 1and being connected to pin Rx, input pin Rx passes through resistance R simultaneously 6to drawing on power supply.Wherein input pin
Figure BDA0000441845580000072
be connected with the output of two-way comparator.When input pin B and input pin
Figure BDA0000441845580000073
while being all high level signal, if input pin
Figure BDA0000441845580000074
during for high level signal, IC module I C 1output pin Q output low level signal; Work as input pin
Figure BDA0000441845580000075
while there is trailing edge (being that high level signal becomes low level signal), IC module I C 1output pin Q exports a direct impulse signal, and the duration T of direct impulse signal is according to capacitor C 1capacitance and resistance R 6resistance value is determined.For example, T=0.45 × R 6× C1, wherein R 6for resistance R 6resistance value, unit be ohm, C 1for capacitor C 1capacitance, unit are farads, and the unit of T is second.
Over-current signal output circuit 13 is by IC module I C 2composition, this IC module I C 2for two-way input or gate logic, input signal is by input pin A 1with pin B 1input, output signal is by input pin Y 1output, as input pin A 1and B 1while being low level signal simultaneously, output pin Y 1output low level signal, otherwise output high level signal.The wherein input pin A of input signal 1with IC module I C 1output pin Q connect, the input pin B of input signal 1be connected with the output of two-way comparator.
Device shown in Fig. 2 judge method that whether electric machine controller need to carry out overcurrent protection as, in the time there is not the situation of overcurrent in electric machine controller, the common output end output high level signal of two-way comparator, IC module I C 1output pin Q output high level signal, IC module I C 2output pin Y 1also export high level signal, judge that electric machine controller does not need to carry out overcurrent protection.
As shown in Figure 3 a, in the time there is overcurrent in electric machine controller, the common output end of two-way comparator (B in Fig. 3 a 1) output becomes low level signal, IC module I C simultaneously 1output pin Q(Fig. 3 a in Q) output a direct impulse signal, the duration of direct impulse is T, as actual overcurrent time (t in Fig. 3 a 1) while being greater than T, the common output end (B in Fig. 3 a of comparator 1) output be still low level signal, now IC module I C 2output pin Y 1(Y in Fig. 3 a 1) output low level signal, judge that electric machine controller need to carry out overcurrent protection.
As shown in Figure 3 b, as actual overcurrent time (t in Fig. 3 b 2) while being less than T, although IC module I C 1output pin Q(Fig. 3 b in Q) a direct impulse signal of output, but due to the common output end of comparator (B in Fig. 3 b now 1) export again high level signal, so IC module I C 2output pin Y 1(Y in Fig. 3 b 1) output high level signal, judge not to be now real over current fault, electric machine controller does not need to carry out overcurrent protection.
Like this, adopt time window delay circuit to judge whether electric machine controller needs to carry out overcurrent protection, get rid of the overcurrent protection misoperation causing due to instantaneous overcurrent, current protection misoperation can reduce electric machine controller and use under complicated electromagnetic environment time.
Embodiment 3
As shown in Figure 4, the present embodiment provides a kind of overcurrent protection control appliance, comprises the overcurrent protective device 31 and the control module 32 that are connected;
The overcurrent protective device that overcurrent protective device 31 provides for above-described embodiment;
The output pin Y of over-current signal output circuit in control module 32 and overcurrent protective device 31 1connect, detect the output pin Y of over-current signal output circuit 1the level signal of output, in the time of overcurrent protective device output low level signal, carries out overcurrent protection to electric machine controller.
Whether the overcurrent protection control appliance that the present embodiment provides, will realize overcurrent protection operation and be converted to level signal output, as the output pin Y of overcurrent signal output apparatus 1when output low level signal, can judge that electric machine controller need to carry out overcurrent protection operation; As the output pin Y of overcurrent signal output apparatus 1when output high level signal, can judge that electric machine controller does not need to carry out overcurrent protection operation, thus the overcurrent protection misoperation that minimizing moment overcurrent causes.
Each embodiment in this specification all adopts the mode of going forward one by one to describe, the identical similar part of each embodiment mutually referring to, what each embodiment stressed is and the difference of other embodiment.These are only preferred embodiment of the present utility model, not in order to limit the utility model, all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection range of the present utility model.
Those of ordinary skills can recognize, unit and the algorithm steps of each example of describing in conjunction with embodiment disclosed herein, can realize with the combination of electronic hardware or computer software and electronic hardware.These functions are carried out with hardware or software mode actually, depend on application-specific and the design constraint of technical scheme.Professional and technical personnel can realize described function with distinct methods to each specifically should being used for, but this realization should not thought and exceeds scope of the present utility model.

Claims (10)

1. an overcurrent protective device, is characterized in that, comprising:
Over-current detection module, the electric current of detection electric machine controller, if not overcurrent of described electric machine controller, the output output high level signal of described over-current detection module, if described electric machine controller overcurrent, the output output low level signal of over-current detection module;
Window delay circuit, connects the output of described over-current detection module, if the output high level signal of described over-current detection module output, the output output low level signal of described window delay circuit; If the output of the output of described over-current detection module becomes low level signal from high level signal, the output of window delay circuit output direct impulse signal;
Over-current signal output circuit, connect the output of described over-current detection module and connect the output of described window delay circuit, if the output output low level signal of the output output low level signal of described over-current detection module and described window delay circuit, the output output low level signal of described over-current signal output circuit.
2. device according to claim 1, is characterized in that, described window delay circuit comprises IC module, capacitor C 1, resistance R 5, resistance R 6, the input pin of described IC module
Figure FDA0000441845570000011
connect the output of described over-current detection module, the input pin of described IC module
Figure FDA0000441845570000012
and input pin B is by described resistance R 5connect power supply, the input pin R of described IC module xby described resistance R 6connect power supply, the input pin C of described IC module xby described capacitor C 1connect input pin R x.
3. device according to claim 2, is characterized in that, the input pin A of described over-current signal output circuit 1connect the output pin Q of described IC module, the input pin B of described over-current signal output circuit 1connect the output of described over-current detection module.
4. device according to claim 1, is characterized in that, described over-current detection module, comprising:
Cross flow point circuit is set, comprise the resistance R connecting successively 1, resistance R 2, resistance R 3;
Current sensor, the electric current of Control of Induction Motors device is exported corresponding voltage;
Overcurrent comparison circuit, comprises the first comparator, the second comparator;
The positive input of described the first comparator is connected in described resistance R 1, described resistance R 2between, the reverse input end of described the first comparator connects described current sensor; The positive input of described the second comparator is connected in described resistance R 2, described resistance R 3between, the reverse input end of described the second comparator connects described current sensor; The output of described the first comparator connects the output of described the second comparator, and connects the output of described overcurrent comparison circuit;
Wherein, in the output of the output of described the first comparator, described the second comparator when at least one output low level signal, the output output low level signal of described overcurrent comparison circuit; When the output of described the first comparator, the output of described the second comparator are all exported high level signal, the output output high level signal of described overcurrent comparison circuit.
5. device according to claim 4, is characterized in that, described resistance R 1tail end connect described resistance R 2head end, described resistance R 2tail end connect described resistance R 3head end, described resistance R 1head end connect power supply, described resistance R 3tail end ground connection.
6. device according to claim 5, is characterized in that, described resistance R 1resistance and described resistance R 3resistance identical.
7. device according to claim 2, is characterized in that, the duration of the direct impulse signal of the output pin Q output of described IC module is definite according to T=0.45 × R × C, and wherein, T is that duration, unit are seconds, and C is capacitor C 1capacitance, unit be farad, R is resistance R 6resistance value, unit be ohm.
8. according to the device described in any one in claim 1 to 7, it is characterized in that, also comprise resistance R 4, the output of described over-current detection module is by described resistance R 4connect power supply.
9. an overcurrent protection control appliance, is characterized in that, comprises the overcurrent protective device as described in any one in claim 1 to 8.
10. overcurrent protection control appliance according to claim 9, is characterized in that, also comprises: control module, the output pin Y of over-current signal output circuit in described control module and described overcurrent protective device 1connect, detect the output pin Y of described over-current signal output circuit 1the level signal of output, in the time of described overcurrent protective device output low level signal, carries out overcurrent protection to electric machine controller.
CN201320845047.9U 2013-12-19 2013-12-19 Overcurrent protection device and overcurrent protection control equipment Expired - Fee Related CN203660493U (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106386411A (en) * 2016-08-30 2017-02-15 中兴长天信息技术（南昌）有限公司 Intelligent farmland irrigation controller
CN107340414A (en) * 2017-07-28 2017-11-10 无锡思泰迪半导体有限公司 A kind of pin multiplexing method and system applied to current sensor chip
CN107389994A (en) * 2017-07-28 2017-11-24 无锡思泰迪半导体有限公司 A kind of configurable pin multiplexing method and system applied to current sensor chip
CN107508341A (en) * 2017-08-11 2017-12-22 北京新能源汽车股份有限公司 Electric automobile supplying power for outside method, apparatus and system

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106386411A (en) * 2016-08-30 2017-02-15 中兴长天信息技术（南昌）有限公司 Intelligent farmland irrigation controller
CN107340414A (en) * 2017-07-28 2017-11-10 无锡思泰迪半导体有限公司 A kind of pin multiplexing method and system applied to current sensor chip
CN107389994A (en) * 2017-07-28 2017-11-24 无锡思泰迪半导体有限公司 A kind of configurable pin multiplexing method and system applied to current sensor chip
CN107389994B (en) * 2017-07-28 2023-08-22 杭州思泰微电子有限公司 Configurable pin multiplexing method and system applied to current sensor chip
CN107340414B (en) * 2017-07-28 2024-02-13 杭州思泰微电子有限公司 Pin multiplexing method and system applied to current sensor chip
CN107508341A (en) * 2017-08-11 2017-12-22 北京新能源汽车股份有限公司 Electric automobile supplying power for outside method, apparatus and system

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