CN220535464U - Charging pile BMS power supply control circuit, direct-current charging pile and charging system - Google Patents
Charging pile BMS power supply control circuit, direct-current charging pile and charging system Download PDFInfo
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- CN220535464U CN220535464U CN202322081397.9U CN202322081397U CN220535464U CN 220535464 U CN220535464 U CN 220535464U CN 202322081397 U CN202322081397 U CN 202322081397U CN 220535464 U CN220535464 U CN 220535464U
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- 239000003990 capacitor Substances 0.000 claims description 25
- 238000005070 sampling Methods 0.000 claims description 13
- HPDFFVBPXCTEDN-UHFFFAOYSA-N copper manganese Chemical compound [Mn].[Cu] HPDFFVBPXCTEDN-UHFFFAOYSA-N 0.000 claims description 2
- 101710096655 Probable acetoacetate decarboxylase 1 Proteins 0.000 claims 1
- 101710096660 Probable acetoacetate decarboxylase 2 Proteins 0.000 claims 1
- 230000002159 abnormal effect Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 101100434411 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) ADH1 gene Proteins 0.000 description 2
- 101150102866 adc1 gene Proteins 0.000 description 2
- 101150042711 adc2 gene Proteins 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 229910000896 Manganin Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Abstract
The utility model relates to a charging pile BMS power supply control circuit, a direct current charging pile and a charging system.
Description
Technical Field
The utility model relates to the field of charging piles, in particular to a charging pile BMS power supply control circuit, a direct-current charging pile and a charging system.
Background
Direct current fills electric pile is a common electric pile equipment that fills. When the existing direct-current charging pile executes automatic charging work on a vehicle to be charged, a charging control unit of the direct-current charging pile starts a 12V power supply to output voltage to a battery management system (namely BMS) of the vehicle to be charged; once the battery management system of the vehicle and the charging control unit of the direct-current charging pile are in CAN communication, the direct-current charging pile selects the 12V power supply to charge the vehicle to be charged. If the battery management system of the vehicle does not have CAN communication with the charging control unit of the direct-current charging pile, the charging control unit of the direct-current charging pile switches the current 12V power supply to 24V power supply to perform charging operation on the vehicle to be charged. The schematic situation of the power supply control circuit of the existing direct current charging pile BMS is shown in fig. 1.
However, the existing power supply control circuit of the direct current charging pile BMS has the defects that: when the battery management system of the vehicle fails, the battery management system of the vehicle and the charging control unit of the direct-current charging pile cannot conduct normal CAN communication, so that the charging control unit of the direct-current charging pile judges that the charging control unit of the direct-current charging pile does not conduct CAN communication with the battery management system of the vehicle, and then the charging control unit of the direct-current charging pile directly provides a 24V power supply to charge the vehicle to be charged, and the battery management system of the vehicle is damaged.
Disclosure of Invention
The first technical problem to be solved by the utility model is to provide a charging pile BMS power supply control circuit for avoiding misjudgment of power supply of a direct current charging pile caused by vehicle BMS fault.
The second technical problem to be solved by the utility model is to provide the direct current charging pile with the BMS power supply control circuit.
The third technical problem to be solved by the utility model is to provide a charging system using the direct current charging pile.
The utility model solves the first technical problem by adopting the technical scheme that: charging stake BMS power supply control circuit includes:
the first power supply is provided with a voltage output end for outputting a first power supply voltage;
the second power supply is provided with a voltage output end for outputting a second power supply voltage; wherein, the voltage value of the second power supply voltage is larger than the voltage value of the first power supply voltage;
the input end of the first relay is connected with the voltage output end of the first power supply;
the input end of the second relay is connected with the voltage output end of the second power supply;
characterized by further comprising:
the positive electrode of the first diode is connected with the output end of the first relay;
the anode of the second diode is connected with the cathode of the first diode, and the cathode of the second diode is connected with the output end of the second relay;
the input end of the third relay is connected with the output end of the first relay, and the output end of the third relay is connected with the cathode of the second diode;
the first end of the first capacitor is connected with the cathode of the second diode through the first resistor, and the second end of the first capacitor is connected with the grounding end;
the first end of the second capacitor is connected with the BMS power supply output end of the direct current charging pile through a second resistor, and the second end of the second capacitor is connected with the grounding end; a third resistor is arranged between the cathode of the second diode and the BMS power supply output end of the direct current charging pile;
the charging control unit is respectively connected with a first current sampling point positioned on a connecting line between the first capacitor and the first resistor and a second current sampling point positioned on a connecting line between the second capacitor and the second resistor; the charging control unit is connected with the first relay, the second relay and the third relay respectively to control the switching action of each relay.
In the charging pile BMS power supply control circuit, the third resistor is a manganese-copper resistor.
In the charging pile BMS power supply control circuit, the first power supply voltage is 12V, and the second power supply voltage is 24V.
Further, in the charging pile BMS power supply control circuit, the resistance value of the first resistor and the resistance value of the second resistor are 1000 Ω; the capacitance value of the first capacitor and the capacitance value of the second capacitor are 100nF.
Still further, in the charging pile BMS power supply control circuit, a resistance value of the third resistor is 0.2 Ω.
In the charging pile BMS power supply control circuit, the first diode and the second diode are EM520 type diodes.
The utility model solves the second technical problem by adopting the technical proposal that: the direct current fills electric pile, characterized by that, it has arbitrary electric pile BMS power supply control circuit to fill to use.
The utility model solves the third technical problem by adopting the technical scheme that: the charging system is characterized in that the direct current charging pile is applied.
In an improvement, in the utility model, the charging system further comprises a server, and the server is in communication connection with the direct current charging pile.
Preferably, in the charging system, the server is in wireless communication connection with the direct-current charging pile.
Compared with the prior art, the utility model has the advantages that: according to the BMS power supply control circuit of the charging pile, the first diode and the second diode which are connected in series front and back are additionally arranged on the basis of the existing BMS power supply control circuit, the two ends of the first diode and the second diode are respectively and correspondingly connected with the first relay output end and the third relay output end, the third resistor is arranged between the second diode and the BMS power supply output end of the direct-current charging pile, and the current sampling points for collecting the current instantaneous value of the power supply loop are respectively arranged at the two ends of the third resistor through the resistor, so that the charging control unit CAN stop charging the vehicle when CAN communication between the charging control unit and the BMS of the vehicle to be charged is abnormal, and error power supply of the direct-current charging pile due to vehicle BMS faults is avoided.
Drawings
Fig. 1 is a schematic diagram of a conventional charging pile BMS power supply control circuit;
fig. 2 is a schematic diagram of a BMS power supply control circuit of a charging pile according to an embodiment of the present utility model.
Detailed Description
The utility model is described in further detail below with reference to the embodiments of the drawings.
The embodiment provides a fill electric pile BMS power supply control circuit, is particularly suitable for direct current fills electric pile. Specifically, referring to fig. 2, the charging pile BMS power supply control circuit in this embodiment includes:
a first power supply VCC having a voltage output terminal outputting a first power supply voltage;
the second power supply VDD has a voltage output terminal outputting a second power supply voltage; wherein, the voltage value of the second power supply voltage is larger than the voltage value of the first power supply voltage;
the input end of the first relay K1 is connected with the voltage output end of the first power supply VCC;
the input end of the second relay K2 is connected with the voltage output end of the second power supply VDD;
the positive electrode of the first diode D1 is connected with the output end of the first relay K1;
the anode of the second diode D2 is connected with the cathode of the first diode D1, and the cathode of the second diode D2 is connected with the output end of the second relay K2;
the input end of the third relay K3 is connected with the output end of the first relay K1, and the output end of the third relay K3 is connected with the cathode of the second diode D2;
a first end of the first capacitor C1 is connected to the cathode of the second diode D2 through the first resistor R1, and a second end of the first capacitor C1 is connected to the ground GND;
the first end of the second capacitor C2 is connected with the BMS power supply output end V_BMS of the direct current charging pile through a second resistor R2, and the second end of the second capacitor C2 is connected with the ground end GND; a third resistor R3 is arranged between the cathode of the second diode D2 and the BMS power supply output end V_BMS of the direct current charging pile;
the charging control unit M is respectively connected with a first current sampling point ADC1 positioned on a connecting line between the first capacitor C1 and the first resistor R1 and a second current sampling point ADC2 positioned on a connecting line between the second capacitor C2 and the second resistor R2; the charging control unit M is connected to the first relay K1, the second relay K2, and the third relay K3, respectively, to control the switching operation of the relays.
In this embodiment, the third resistor R3 is a manganin resistor, and the resistance value of the third resistor R3 is 0.2Ω. The first supply voltage is 12V and the second supply voltage is 24V. The resistance of the first resistor R1 and the resistance of the second resistor R2 are 1000 omega; the capacitance value of the first capacitor C1 and the capacitance value of the second capacitor C2 are both 100nF; the first diode D1 and the second diode D2 are both EM520 type diodes.
The following describes a power supply control principle of the power supply control circuit of the charging pile BMS in this embodiment with reference to fig. 2:
after a user inserts a charging gun of a direct-current charging pile into a charging input end of a vehicle to be charged, a charging control unit M of the charging pile firstly controls and closes a first relay K1, a first diode D1 and a second diode D2 provide about 3.2V voltage drop, a battery management system of the vehicle to be charged obtains about 8.8V voltage, a BMS working interval of 24V voltage provided by a second power supply VDD is avoided, and misjudgment of the charging control unit is avoided;
the charging control unit M obtains current instantaneous values of the power supply loop through the first current sampling point ADC1 and the second current sampling point ADC2 so as to judge whether a battery management system of the vehicle to be charged starts working or not:
the charging control unit M interacts with the BMS of the vehicle to be charged through CAN communication, and supplements and judges whether the BMS of the vehicle to be charged works or not:
case 1: if the current instantaneous value acquired by the current sampling point reaches a preset current threshold and the CAN communication is normal, closing a third relay K1 to provide 12V power for the BMS of the charging vehicle;
case 2: if the current instantaneous value acquired by the current sampling point reaches a preset current threshold value, but CAN communication between the charging control unit M and the BMS of the vehicle to be charged is abnormal, the charging pile judges that the CAN communication is abnormal, and the charging process is stopped;
case 3: if the current instantaneous value acquired through the current sampling point does not reach the preset current threshold value and CAN communication between the charging control unit M and the BMS of the vehicle to be charged is abnormal, the first relay K1 is opened, the second relay K2 is closed, and therefore 24V power supply is provided for the BMS of the vehicle to be charged. If the CAN communication between the charging control unit M and the BMS of the vehicle to be charged is normal after the second relay K2 is closed, carrying out a charging process; otherwise, the charging pile judges that the CAN communication is abnormal, and the charging process is stopped.
The charging pile BMS power supply control circuit of this embodiment is through increasing first diode and the second diode that establishes ties around setting up on current charging pile BMS power supply control circuit basis to and both ends correspond the third relay of connecting first relay output and second relay output respectively to set up the third resistance between the BMS power supply output V_BMS of second diode and direct current charging pile, and the both ends of this third resistance are provided with the current sampling point of gathering the supply loop current instantaneous value through the resistance respectively, and then make charging control unit CAN be according to the judgement of the supply loop current instantaneous value that corresponds behind closed first relay and to the closed handling of each relay, realize stopping charging for the vehicle when CAN communication is unusual between charging control unit and waiting to charge the BMS of vehicle, thereby avoid leading to direct current charging pile erroneous judgement power supply because of vehicle BMS trouble.
This embodiment also provides a direct current charging stake. The direct-current charging pile is provided with the charging pile BMS power supply control circuit.
The embodiment also provides a charging system comprising the server. The charging system is provided with the direct-current charging pile, and the server is connected with the direct-current charging pile in a wireless communication mode.
While the preferred embodiments of the present utility model have been described in detail, it is to be clearly understood that the same may be varied in many ways by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (10)
1. Charging stake BMS power supply control circuit includes:
a first power supply source (VCC) having a voltage output terminal outputting a first power supply voltage;
a second power supply source (VDD) having a voltage output terminal outputting a second power supply voltage; wherein, the voltage value of the second power supply voltage is larger than the voltage value of the first power supply voltage;
the input end of the first relay (K1) is connected with the voltage output end of the first power supply (VCC);
the input end of the second relay (K2) is connected with the voltage output end of the second power supply (VDD);
characterized by further comprising:
a first diode (D1) whose positive electrode is connected to the output end of the first relay (K1);
a second diode (D2) whose anode is connected to the cathode of the first diode (D1), and whose cathode is connected to the output end of the second relay (K2);
the input end of the third relay (K3) is connected with the output end of the first relay (K1), and the output end of the third relay (K3) is connected with the cathode of the second diode (D2);
a first capacitor (C1) having a first end connected to the negative electrode of the second diode (D2) through a first resistor (R1), and a second end of the first capacitor (C1) connected to the Ground (GND);
a second capacitor (C2), wherein the first end of the second capacitor (C2) is connected with the BMS power supply output end (V_BMS) of the charging pile through a second resistor (R2), and the second end of the second capacitor (C2) is connected with the ground end (GND); a third resistor (R3) is arranged between the cathode of the second diode (D2) and the BMS power supply output end (V_BMS) of the charging pile;
the charging control unit (M) is respectively connected with a first current sampling point (ADC 1) positioned on a connecting line between the first capacitor (C1) and the first resistor (R1) and a second current sampling point (ADC 2) positioned on a connecting line between the second capacitor (C2) and the second resistor (R2); the charging control unit (M) is connected to the first relay (K1), the second relay (K2) and the third relay (K3) respectively to control the switching operation of the relays.
2. The charging pile BMS power supply control circuit according to claim 1, characterized in that the third resistor (R3) is a manganese-copper resistor.
3. The charging pile BMS power supply control circuit according to claim 1, wherein the first power supply voltage is 12V and the second power supply voltage is 24V.
4. A charging pile BMS power supply control circuit according to claim 3, characterized in that the resistance value of the first resistor (R1) and the resistance value of the second resistor (R2) are both 1000 Ω; the capacitance value of the first capacitor (C1) and the capacitance value of the second capacitor (C2) are both 100nF.
5. The charging pile BMS power supply control circuit according to claim 4, wherein the resistance value of the third resistor (R3) is 0.2 Ω.
6. The charging pile BMS power supply control circuit according to any of claims 1 to 5, characterized in that said first diode (D1) and said second diode (D2) are both EM520 type diodes.
7. A direct current charging pile, characterized in that the charging pile BMS power supply control circuit according to any one of claims 1 to 6 is applied.
8. A charging system, wherein the dc charging stake of claim 7 is applied.
9. The charging system of claim 8, further comprising a server in communication with the dc charging stake.
10. The charging system of claim 9, wherein the server is in wireless communication with the dc charging stake.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322081397.9U CN220535464U (en) | 2023-08-03 | 2023-08-03 | Charging pile BMS power supply control circuit, direct-current charging pile and charging system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322081397.9U CN220535464U (en) | 2023-08-03 | 2023-08-03 | Charging pile BMS power supply control circuit, direct-current charging pile and charging system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220535464U true CN220535464U (en) | 2024-02-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322081397.9U Active CN220535464U (en) | 2023-08-03 | 2023-08-03 | Charging pile BMS power supply control circuit, direct-current charging pile and charging system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220535464U (en) |
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2023
- 2023-08-03 CN CN202322081397.9U patent/CN220535464U/en active Active
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