CN212113568U - Protection control circuit of pre-charging relay and electronic equipment - Google Patents
Protection control circuit of pre-charging relay and electronic equipment Download PDFInfo
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- CN212113568U CN212113568U CN202021211278.0U CN202021211278U CN212113568U CN 212113568 U CN212113568 U CN 212113568U CN 202021211278 U CN202021211278 U CN 202021211278U CN 212113568 U CN212113568 U CN 212113568U
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Abstract
The embodiment of the utility model discloses protection control circuit and electronic equipment of pre-charge relay, this protection control circuit includes first control circuit, step-down circuit, pre-charge relay and pre-charge circuit, first control circuit's one end is connected with step-down circuit's one end electricity, step-down circuit's the other end is connected with pre-charge relay's first coil pin electricity, pre-charge relay's second coil pin is for predetermineeing voltage input end, pre-charge circuit includes pre-charge resistance and pre-charge electric capacity, pre-charge relay's first contact is connected with pre-charge resistance's first end electricity, and still with pre-charge electric capacity's positive terminal electricity is connected, pre-charge relay's second contact is connected with pre-charge resistance's other end electricity. Through setting up first control circuit and step-down circuit for when the pre-charge relay is in the actuation state, can carry out step-down to the loaded voltage of pre-charge relay and handle, effectively reduce generating heat of pre-charge relay, reduce the temperature rise, improve the life of pre-charge relay.
Description
Technical Field
The utility model relates to a relay technical field especially relates to a protection control circuit and electronic equipment of pre-charging relay.
Background
The pre-charging relay used in the market at present controls the attraction and the disconnection of the pre-charging relay by directly controlling the opening and the closing of a switch through a single chip microcomputer, and generally, in order to ensure that the pre-charging relay can be completely attracted, low-voltage direct current is directly loaded at two ends of a coil of the pre-charging relay.
However, the pre-charging relay is operated in a long-time attracting mode, and rated voltage is applied to two ends of a coil of the pre-charging relay for a long time, so that the pre-charging relay generates heat seriously, the temperature rise is high, and the service life of the pre-charging relay is influenced.
SUMMERY OF THE UTILITY MODEL
Therefore, it is necessary to provide a protection control circuit and an electronic device for a pre-charging relay, which can effectively reduce the heat generation of the pre-charging relay, reduce the temperature rise, and improve the service life of the pre-charging relay by reducing the voltage at the two ends of the coil of the pre-charging relay.
In a first aspect, the present invention provides a protection control circuit of a pre-charge relay, the protection control circuit includes:
the device comprises a first control circuit, a voltage reduction circuit, a pre-charging relay and a pre-charging circuit;
one end of the first control circuit is a control signal input end, the other end of the first control circuit is electrically connected with one end of the voltage reduction circuit, the other end of the voltage reduction circuit is electrically connected with a first coil pin of the pre-charging relay, and a second coil pin of the pre-charging relay is a preset voltage input end;
the pre-charging circuit comprises a pre-charging resistor and a pre-charging capacitor, a first contact of the pre-charging relay is electrically connected with one end of the pre-charging resistor, the first contact of the pre-charging relay is also electrically connected with the positive end of the pre-charging capacitor, a second contact of the pre-charging relay is electrically connected with the other end of the pre-charging resistor, and the negative end of the pre-charging capacitor is grounded.
Optionally, the first control circuit comprises:
the circuit comprises a first resistor, a second resistor and a first triode;
one end of the first resistor is a control signal input end, the other end of the first resistor is electrically connected with the base electrode of the first triode, the second resistor is connected between the base electrode and the emitting electrode of the first triode in parallel, the emitting electrode of the first triode is grounded, and the collecting electrode of the first triode is electrically connected with one end of the voltage reduction circuit.
Optionally, the step-down circuit includes at least two step-down diodes, the at least two step-down diodes are connected in series in the same direction, and the positive terminal after being connected in series is electrically connected to the first coil pin of the pre-charge relay, and the negative terminal after being connected in series is electrically connected to the collector of the first triode.
Optionally, the protection control circuit further includes: and one end of the second control circuit is a control signal input end, and the other end of the second control circuit is electrically connected with the first coil pin of the pre-charging relay.
Optionally, the second control circuit comprises:
a third resistor, a fourth resistor and a second triode;
one end of the third resistor is a control signal input end, the other end of the third resistor is electrically connected with the base electrode of the second triode, the fourth resistor is connected in parallel between the base electrode and the emitting electrode of the second triode, the emitting electrode of the second triode is grounded, and the collecting electrode of the second triode is electrically connected with the first coil pin of the pre-charging relay.
Optionally, the protection control circuit further includes:
and the negative end of the fly-wheel diode is electrically connected with the second coil pin of the pre-charging relay, and the positive end of the fly-wheel diode is electrically connected with the first coil pin of the pre-charging relay.
Optionally, the protection control circuit further includes:
and one end of the filter capacitor is electrically connected with a first coil pin of the pre-charging relay, and the other end of the filter capacitor is electrically connected with a second coil pin of the pre-charging relay.
Optionally, the pre-charge circuit further comprises
And the anti-reverse diode is connected with the pre-charging resistor in series, and the cathode end of the anti-reverse diode is electrically connected with the anode end of the pre-charging capacitor.
Optionally, the pre-charge resistor includes a fifth resistor and a sixth resistor, the fifth resistor and the sixth resistor are connected in parallel, one end of the parallel circuit is connected to the power input terminal, and the other end of the parallel circuit is connected to the positive terminal of the anti-reverse diode;
the pre-charging capacitor comprises a first capacitor and a second capacitor, the positive terminals of the first capacitor and the second capacitor are electrically connected with the negative terminal of the anti-reverse diode, and the negative terminals of the first capacitor and the second capacitor are grounded.
In a second aspect, the present invention provides an electronic device including the protection control circuit of the pre-charge relay according to the first aspect.
Adopt the embodiment of the utility model provides a, following beneficial effect has: the protection control circuit of pre-charging relay includes first control circuit, step-down circuit, pre-charging relay and pre-charging circuit, this first control circuit's one end is the control signal input, first control circuit's the other end is connected with step-down circuit's one end electricity, step-down circuit's the other end is connected with pre-charging relay's first coil pin electricity, pre-charging relay's second coil pin is for predetermineeing voltage input end, pre-charging circuit includes pre-charging resistor and pre-charging capacitor, pre-charging relay's first contact is connected with pre-charging resistor's first end electricity, and still with pre-charging capacitor's positive terminal electricity is connected, pre-charging relay's second contact is connected with pre-charging resistor's the other end electricity, pre. Through setting up first control circuit and step-down circuit for when the pre-charge relay is in the actuation state, can reduce the voltage of loading on the pre-charge relay, effectively reduce generating heat of pre-charge relay, reduce the temperature rise, improve the life of pre-charge relay.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Wherein:
fig. 1 is a schematic structural diagram of a protection control circuit of a pre-charge relay in an embodiment of the present application;
fig. 2 is a circuit diagram of a protection control circuit of a pre-charge relay according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1, a schematic diagram of a protection control circuit of a pre-charge relay in an embodiment of the present application is shown, where the protection control circuit includes: a first control circuit 101, a voltage step-down circuit 102, a precharge relay 103, and a precharge circuit.
One end of the first control circuit 101 is a control signal input end RY1, the other end of the first control circuit 101 is electrically connected with one end of the voltage reduction circuit 102, the other end of the voltage reduction circuit 102 is electrically connected with a first coil pin 1 of the pre-charging relay 103, and a second coil pin 2 of the pre-charging relay 103 is a preset voltage input end;
the pre-charging circuit comprises a pre-charging resistor 104 and a pre-charging capacitor 105, a first contact 3 of the pre-charging relay 103 is electrically connected with one end of the pre-charging resistor 104, the first contact 3 of the pre-charging relay 103 is also electrically connected with the positive terminal of the pre-charging capacitor 105, a second contact 4 of the pre-charging relay 103 is electrically connected with the other end of the pre-charging resistor 104, and the negative terminal of the pre-charging capacitor 105 is grounded.
In a possible implementation manner, the protection control circuit further includes: one end of the second control circuit 106 and one end of the second control circuit 106 are control signal input ends RY2, and the other end of the second control circuit 106 is electrically connected to the first coil pin 1 of the pre-charge relay 103.
In the embodiment of the present invention, when the pre-charging circuit is pre-charged, RY1 and RY2 have no control signal input, and the pre-charging relay 103 is in the disconnected state, after the pre-charging of the pre-charging circuit is completed, control signals can be input from RY1 and RY2, respectively, wherein the second control circuit 106 is used for controlling the pre-charging relay 103 to attract based on the control signal, and the pre-charging relay 103 is in the attracted state, the first control circuit 101 and the voltage reduction circuit are used for realizing voltage reduction based on the control signal, and reducing the voltage loaded between the first coil pin 1 and the second coil pin 2 of the pre-charging relay 103, so that when the pre-charging relay 103 is in the attracted state, the voltage reduction processing can be performed on the voltage input from the second coil pin 2 of the pre-charging relay 103, the voltage loaded between the coils of the pre-charging relay is reduced, the heat generation of, the service life of the pre-charging relay is prolonged.
Referring to fig. 2, another structural schematic diagram of a protection control circuit of a pre-charge relay according to an embodiment of the present invention includes the first control circuit 101, the voltage step-down circuit 102, the pre-charge relay 103, the pre-charge circuit, and the second control circuit 106 shown in fig. 1.
Wherein, the first control circuit 101 includes:
the circuit comprises a first resistor R1, a second resistor R2 and a first triode Q1;
one end of the first resistor R1 is a control signal input end RY1, the other end of the first resistor R1 is electrically connected with the base of the first triode Q1, the second resistor R2 is connected in parallel between the base and the emitter of the first triode Q1, the emitter of the first triode Q1 is grounded, and the collector of the first triode Q1 is electrically connected with one end of the step-down circuit 102.
The buck circuit 102 includes at least two buck diodes, the at least two buck diodes are connected in series in the same direction, the positive terminal of the series connection is electrically connected to the first coil pin 1 of the precharge relay 103, and the negative terminal of the series connection is electrically connected to the collector of the first triode Q1. It should be noted that, in the embodiment shown in fig. 2, it is exemplified that the step-down circuit 102 includes two step-down diodes, namely, a first step-down diode D1 and a second step-down diode D2, wherein the first step-down diode D1 and the second step-down diode D2 are connected in series in the same direction, that is, the positive terminal of the first step-down diode D1 is electrically connected to the first coil pin 1 of the precharge relay 103, the negative terminal of the first step-down diode D1 is electrically connected to the positive terminal of the second step-down diode D2, and the negative terminal of the second step-down diode D2 is electrically connected to the collector of the first triode Q1. It is understood that, in practical applications, the number of the buck diodes included in the buck circuit 102 is related to the magnitude of the voltage drop required to be achieved, for example, if one buck diode can generate a voltage drop of 1.1V, and if the magnitude of the voltage drop required to be achieved is 2.2V, it indicates that two buck diodes are required, and therefore, the type and the number of the buck diodes in the buck circuit 102 can be determined according to specific requirements in practical applications, and are not limited herein.
In the embodiment of the present invention, the second control circuit 106 includes:
a third resistor R3, a fourth resistor R4 and a second transistor Q2;
one end of the third resistor R3 is a control signal input end RY2, the other end of the third resistor R3 is electrically connected with the base electrode of the second triode Q2, the fourth resistor R4 is connected in parallel between the base electrode and the emitter electrode of the second triode Q2, the emitter electrode of the second triode Q2 is grounded, and the collector electrode of the second triode Q2 is electrically connected with the first coil pin 1 of the pre-charging relay 103.
In an embodiment of the present invention, the protection control circuit further includes:
the negative terminal of the freewheeling diode B1, the freewheeling diode B1, and the positive terminal of the freewheeling diode B1 are electrically connected to the second coil pin 2 of the precharge relay 103, and the first coil pin 1 of the precharge relay 103, respectively.
In an embodiment of the present invention, the protection control circuit further includes:
one end of the filter capacitor C1 and one end of the filter capacitor C1 are electrically connected to the first coil pin 1 of the pre-charge relay 103, and the other end of the filter capacitor C2 is electrically connected to the second coil pin 2 of the pre-charge relay 103, that is, the freewheeling diode B1 and the filter capacitor C1 are both connected in parallel between the first coil pin 1 and the second coil pin 2 of the pre-charge relay 103. The filter capacitor C1 is used for filtering to prevent malfunction due to high frequency pulses, such as erroneous engagement of the precharge relay 103.
In the embodiment of the present invention, the pre-charging resistor 104 and the pre-charging capacitor 105 form a pre-charging circuit, and the pre-charging circuit may further include an anti-reverse diode D3, the anti-reverse diode D3 is connected in series with the pre-charging resistor 104, and the negative terminal of the anti-reverse diode D3 is electrically connected to the positive terminal of the pre-charging capacitor 105, the negative terminal of the pre-charging capacitor 105 is grounded, wherein the anti-reverse diode D3 is used for preventing the reverse current flow.
In the embodiment shown in fig. 2, a possible implementation manner of the pre-charge resistor 104 and the pre-charge capacitor 105 is that the pre-charge resistor 104 includes a fifth resistor R5 and a sixth resistor R6, and the fifth resistor R5 and the sixth resistor R2 are connected in parallel, one end of the parallel circuit is connected to the power input terminal V, and the other end of the parallel circuit is connected to the positive terminal of the anti-reverse diode D3. The precharge capacitor 105 includes a first capacitor C2 and a second capacitor C3, and the first capacitor C2 and the second capacitor C3 are both directional capacitors, the positive terminal of the first capacitor C2 is electrically connected to the negative terminal of the anti-reverse diode D3, the negative terminal of the first capacitor C2 is grounded, the positive terminal of the second capacitor C3 is electrically connected to the negative terminal of the anti-reverse diode D3, and the negative terminal of the second capacitor C2 is grounded.
In the embodiment of the present invention, the power input terminal V is used for inputting a power source, the power source can be a 48V power source, and the power input terminal V, the pre-charging resistor 104, the anti-reverse diode D3 and the pre-charging capacitor 105 form a pre-charging circuit.
During the pre-charging, a voltage is input from the power input terminal V, a generated current passes through the pre-charging resistor 104, the anti-reverse diode D3 and the pre-charging capacitor 105, the pre-charging capacitor 105 is charged, and finally the current is output from the output port VCC.
The above process is a precharging process, and it should be noted that RY1 and RY2 have no control signal input during the precharging process, and precharge relay 105 is in an off state.
After the pre-charging circuit completes the pre-charging process, the pre-charging resistor 104 needs to be short-circuited by the pre-charging relay 105, so that the power consumption can be reduced when the pre-charging capacitor 105 is used for supplying power.
Wherein, after the precharge process is completed, the complete pull-in of the precharge relay 105 can be realized, and the pull-in state can be maintained.
Specifically, the implementation of the complete actuation of the pre-charge relay 105 includes: control signals are input to the first control circuit 101 and the second control circuit 106 through an I/O interface of the single chip microcomputer, high level can be simultaneously input to RY1 and RY2, at the moment, because the impedance of the second control circuit 106 is low, current flows through the second control circuit 106, the voltage input end of the power-on circuit is 12V, the power-on circuit is connected to the pre-charging relay 103 and then to the second triode Q2, and finally to the ground, the second triode Q2 is conducted, the voltage loaded between the first coil pin 1 and the second coil pin 2 of the pre-charging relay 103 is 12V (the saturation conduction voltage drop of the second triode Q2 is ignored), and the voltage enables the pre-charging relay 103 to be quickly and completely attracted. It should be noted that, in the embodiment shown in fig. 2, the preset voltage is an example of an input 12V voltage, and in practical applications, the preset voltage may be configured according to a voltage actually required by the pre-charge relay 103 to achieve fast and complete pull-in, which is not limited herein.
After the pre-charge relay 103 is attracted, because if 12V voltage is recorded all the time, the pre-charge relay 103 generates a large amount of heat, the temperature rise is high, and the service life is affected, the voltage applied to the pre-charge relay 103 is reduced by using the voltage reduction circuit 102 of the first control circuit 101 after the pre-charge relay 103 is attracted through a voltage reduction mode, which is specifically as follows:
the control signal to be controlled and inputted to the second control circuit 106 is changed from high level to low level, at this time, since the control signal inputted by the first control circuit 101 is high level, the power-on circuit is changed into 12V voltage input end to the pre-charging relay 103, then to the voltage-reducing circuit 102, then to the second control circuit 101, and finally to ground, in the power-on circuit, because of the voltage-reducing circuit 102, the voltage loaded between the first coil pin 1 and the second coil pin 2 of the pre-charging relay 103 is 12V minus the voltage drop generated by the voltage-reducing circuit (ignoring the saturated conduction voltage drop of the first triode Q1). If the voltage reduction circuit includes two voltage reduction diodes with a voltage drop of 1.1V as shown in fig. 2, the voltage applied to the pre-charge relay 103 is 9.8V, which is greater than the release voltage of the pre-charge relay 103 and less than 12V, so that the heat generation amount can be effectively reduced, the temperature rise of the pre-charge relay 103 can be reduced, and the service life of the pre-charge relay 103 can be prolonged.
It should be noted that, since it is necessary to ensure that the pre-charge relay 103 can still be maintained in the pull-in state after the voltage reduction, the voltage loaded on the pre-charge relay 103 after the voltage reduction needs to be greater than the release voltage (i.e., the off voltage) of the pre-charge relay 103, in practical applications, the voltage reduction range that the voltage reduction circuit 102 can be located can be determined according to the voltage that the pre-charge relay 103 can achieve the complete pull-in state and the voltage maintained in the pull-in state, which is not limited herein.
By inputting a high level to the first control circuit 101 and the second control circuit 106 at the same time, the precharge relay 103 can be completely attracted, and by changing the high level of the second control circuit to a low level, the precharge relay 103 can maintain an attraction state on the basis of reducing the voltage loaded thereon, thereby effectively realizing the protection of the precharge relay.
Further, it is understood that after the voltage reduction by the first control circuit 101 and the voltage reduction circuit 102 is realized by changing the high level input by the second control circuit 106 to the low level, the second control circuit 106 may be controlled not to input the control signal and the second control circuit 106 may be turned off.
After the pre-charging relay 103 is powered off, because voltage exists between the first coil pin 1 and the second coil pin 2 of the pre-charging relay 103, a freewheeling loop is formed by the pre-charging relay and the freewheeling diode B1, and the voltage on the pre-charging relay 103 is slowly discharged through the freewheeling diode B1, so that damage to the first coil and the second coil of the pre-charging relay 103 due to power off is avoided, the pre-charging relay 103 is effectively protected, and the service life of the pre-charging relay 103 is prolonged.
The embodiment of the utility model provides an in, keep the actuation state to pre-charge relay 103 through using first control circuit 101 and step-down circuit 102 to control for can reduce the voltage of loading on pre-charge relay 103 when keeping pre-charge relay 103 in the actuation state, effectively reduce pre-charge relay 103's calorific capacity, reduce the temperature rise, prolong pre-charge relay 103's life, realize the protection to pre-charge relay 103.
In an embodiment of the present invention, there is also provided an electronic device including the protection control circuit of the pre-charge relay in the embodiment shown in fig. 1 or fig. 2.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A protection control circuit of a pre-charge relay, characterized in that the protection control circuit comprises:
the device comprises a first control circuit, a voltage reduction circuit, a pre-charging relay and a pre-charging circuit;
one end of the first control circuit is a control signal input end, the other end of the first control circuit is electrically connected with one end of the voltage reduction circuit, the other end of the voltage reduction circuit is electrically connected with a first coil pin of the pre-charging relay, and a second coil pin of the pre-charging relay is a preset voltage input end;
the pre-charging circuit comprises a pre-charging resistor and a pre-charging capacitor, a first contact of the pre-charging relay is electrically connected with one end of the pre-charging resistor, the first contact of the pre-charging relay is also electrically connected with the positive end of the pre-charging capacitor, a second contact of the pre-charging relay is electrically connected with the other end of the pre-charging resistor, and the negative end of the pre-charging capacitor is grounded.
2. The protection control circuit of claim 1, wherein the first control circuit comprises:
the circuit comprises a first resistor, a second resistor and a first triode;
one end of the first resistor is a control signal input end, the other end of the first resistor is electrically connected with the base electrode of the first triode, the second resistor is connected between the base electrode and the emitting electrode of the first triode in parallel, the emitting electrode of the first triode is grounded, and the collecting electrode of the first triode is electrically connected with one end of the voltage reduction circuit.
3. The protection control circuit according to claim 2, wherein the buck circuit comprises at least two buck diodes, the at least two buck diodes are connected in series in the same direction, a positive terminal of the series connection is electrically connected to the first coil pin of the pre-charge relay, and a negative terminal of the series connection is electrically connected to the collector of the first triode.
4. The protection control circuit of claim 1, further comprising: and one end of the second control circuit is a control signal input end, and the other end of the second control circuit is electrically connected with the first coil pin of the pre-charging relay.
5. The protection control circuit of claim 4, wherein the second control circuit comprises:
a third resistor, a fourth resistor and a second triode;
one end of the third resistor is a control signal input end, the other end of the third resistor is electrically connected with the base electrode of the second triode, the fourth resistor is connected in parallel between the base electrode and the emitting electrode of the second triode, the emitting electrode of the second triode is grounded, and the collecting electrode of the second triode is electrically connected with the first coil pin of the pre-charging relay.
6. The protection control circuit according to any one of claims 1 to 5, characterized in that the protection control circuit further comprises:
and the negative end of the fly-wheel diode is electrically connected with the second coil pin of the pre-charging relay, and the positive end of the fly-wheel diode is electrically connected with the first coil pin of the pre-charging relay.
7. The protection control circuit according to any one of claims 1 to 5, characterized in that the protection control circuit further comprises:
and one end of the filter capacitor is electrically connected with a first coil pin of the pre-charging relay, and the other end of the filter capacitor is electrically connected with a second coil pin of the pre-charging relay.
8. The protection control circuit according to any one of claims 1 to 5, wherein the pre-charge circuit further comprises
And the anti-reverse diode is connected with the pre-charging resistor in series, and the cathode end of the anti-reverse diode is electrically connected with the anode end of the pre-charging capacitor.
9. The protection control circuit according to any one of claim 8, wherein the pre-charge resistor comprises a fifth resistor and a sixth resistor, the fifth resistor and the sixth resistor are connected in parallel, one end of the parallel circuit is connected to the power input terminal, and the other end of the parallel circuit is connected to the positive terminal of the anti-reverse diode;
the pre-charging capacitor comprises a first capacitor and a second capacitor, the positive terminals of the first capacitor and the second capacitor are electrically connected with the negative terminal of the anti-reverse diode, and the negative terminals of the first capacitor and the second capacitor are grounded.
10. An electronic device characterized in that the electronic device comprises the protection control circuit of the pre-charge relay according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202021211278.0U CN212113568U (en) | 2020-06-24 | 2020-06-24 | Protection control circuit of pre-charging relay and electronic equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021211278.0U CN212113568U (en) | 2020-06-24 | 2020-06-24 | Protection control circuit of pre-charging relay and electronic equipment |
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| CN212113568U true CN212113568U (en) | 2020-12-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114604109A (en) * | 2022-04-07 | 2022-06-10 | 中国第一汽车股份有限公司 | Pre-charging device, system and pre-charging control method |
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2020
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114604109A (en) * | 2022-04-07 | 2022-06-10 | 中国第一汽车股份有限公司 | Pre-charging device, system and pre-charging control method |
| CN114604109B (en) * | 2022-04-07 | 2024-03-19 | 中国第一汽车股份有限公司 | Precharge device, precharge system, and precharge control method |
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