CN217124600U - Vehicle-mounted DCDC auxiliary control circuit - Google Patents
Vehicle-mounted DCDC auxiliary control circuit Download PDFInfo
- Publication number
- CN217124600U CN217124600U CN202220974972.0U CN202220974972U CN217124600U CN 217124600 U CN217124600 U CN 217124600U CN 202220974972 U CN202220974972 U CN 202220974972U CN 217124600 U CN217124600 U CN 217124600U
- Authority
- CN
- China
- Prior art keywords
- low
- voltage
- dcdc
- voltage relay
- relay
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model discloses an on-vehicle DCDC auxiliary control circuit, it includes: a first low-voltage relay a1, a second low-voltage relay a2, a third low-voltage relay A3, and a diode b1, the first low-voltage relay a1 being provided between the DCDC direct-current converter and the low-voltage battery; the second low-voltage relay a2 is arranged between the DCDC direct-current converter and the load end; a third low-voltage relay a3 and a diode b1 are provided between the low-voltage battery and the load terminal, the anode of the diode b1 is connected to the low-voltage battery, and the cathode of the diode b1 is connected to the load terminal. The utility model discloses a vehicle-mounted DCDC auxiliary control circuit, according to load power, battery energy storage and power battery energy storage condition, the power efficiency of DCDC can be improved to the low pressure power consumption strategy of rational distribution, reduces the loss of electric energy efficiency, realizes the high-efficient work of DCDC; the service life of the storage battery is prolonged by reasonably controlling the charging and discharging processes of the low-voltage storage battery.
Description
Technical Field
The utility model relates to a new energy automobile technical field especially relates to an on-vehicle DCDC auxiliary control circuit.
Background
The traditional automobile has serious environmental pollution, and petrochemical energy is not renewable, so that the pure electric automobile is one of research hotspots and development trends of the industry under the large background; the DCDC converts high voltage into low voltage (12V or 24V), and maintains the electric quantity balance of the low-voltage storage battery and the power consumption of the vehicle-mounted low-voltage accessories; along with the development of science and technology, intelligent electrical equipment in the automobile is continuously abundant, the power consumption demand is increased, and the improvement of the power consumption efficiency of low-voltage electrical appliances is one of means for improving the economy of the whole automobile.
At present, a direct current converter (DCDC) is generally used to convert the voltage into low voltage to charge a storage battery or supply power to a load, and a conventional control strategy of the DCDC is to adjust the output voltage of the DCDC according to the power demand of the low voltage load so as to meet the power demand of a low voltage load. Although the control strategy can meet the power consumption requirement of a low-voltage system, the change of the state of the low-voltage storage battery is not fully considered, and in the using process of an electric appliance, the DCDC directly supplies power to the load and charges the storage battery, so that the storage battery is in an overcharged state, the cyclic discharge is less, the service life of the storage battery is influenced, and meanwhile, the working efficiency of the DCDC cannot reach the optimum due to different loads.
Therefore, a vehicle-mounted DCDC auxiliary control circuit is needed.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a vehicle-mounted DCDC auxiliary control circuit to solve the problems in the prior art, improve the power efficiency of DCDC and reduce the efficiency loss of electric energy; the service life of the low-voltage storage battery is prolonged by controlling reasonable charging and discharging of the low-voltage storage battery.
The utility model provides an on-vehicle DCDC auxiliary control circuit, wherein, include:
a first low-voltage relay a1, a second low-voltage relay a2, a third low-voltage relay A3, and a diode b1, wherein:
the first low-voltage relay A1 is arranged between the DCDC direct-current converter and the low-voltage storage battery;
the second low-voltage relay A2 is arranged between the DCDC direct-current converter and a load end;
the third low-voltage relay a3 and the diode b1 are provided between the low-voltage battery and the load terminal, and the anode of the diode b1 is connected to the low-voltage battery, and the cathode of the diode b1 is connected to the load terminal.
In the vehicle-mounted DCDC assist control circuit, preferably, one end of the third low-voltage relay A3 is connected to the low-voltage battery, the other end of the third low-voltage relay A3 is connected to the positive electrode of the diode b1, and the negative electrode of the diode b1 is connected to the load terminal.
In the vehicle-mounted DCDC auxiliary control circuit, preferably, the first low-voltage relay a1 and the second low-voltage relay a2 are normally open relays, and the third low-voltage relay A3 is a normally closed relay.
In the vehicle-mounted DCDC assist control circuit as described above, it is preferable that the open/close states of the first low-voltage relay a1, the second low-voltage relay a2, and the third low-voltage relay A3 be controlled by an assist controller.
The vehicle-mounted DCDC auxiliary control circuit as described above, wherein preferably, in a case where the first capacity of the low-voltage battery is lower than the SOC threshold value S1, the auxiliary controller controls the first low-voltage relay a1 to close, the DCDC direct-current converter operates and charges the low-voltage battery; and the DCDC direct current converter is not started under the condition that the first collecting capacity of the low-voltage storage battery is higher than the SOC threshold value S1.
The vehicle-mounted DCDC auxiliary control circuit as described above, wherein preferably, in a case where the load current at the load terminal reaches the current threshold S2, the auxiliary controller controls the second low-voltage relay a2 to be closed so that the DCDC direct-current converter directly supplies power to the load terminal, while controlling the third low-voltage relay A3 to be opened with a delay of 15ms to 25 ms.
The vehicle-mounted DCDC auxiliary control circuit as described above, wherein, preferably, in a case where the load current at the load terminal reaches the current threshold value S2 and the first low-voltage relay a1 is closed, if the SOC of the low-voltage battery is charged higher than a low-voltage battery parameter set percentage, the first low-voltage relay a1 is opened and the DCDC dc converter supplies power only to the load terminal.
The vehicle-mounted DCDC auxiliary control circuit as described above, wherein preferably, when the load current at the load end is less than the current threshold value S2, the first low-voltage relay a1 is in a closed state, and the SOC of the low-voltage battery does not reach the low-voltage battery parameter setting percentage, the auxiliary controller controls the second low-voltage relay a2 to be closed, and simultaneously, the third low-voltage relay A3 is opened after delaying for 15ms to 25ms, until the SOC of the low-voltage battery reaches the low-voltage battery parameter setting percentage, the first low-voltage relay a1 is opened.
The vehicle-mounted DCDC auxiliary control circuit as described above, wherein preferably, when the load current at the load end is smaller than the current threshold S2, if the SOC of the low-voltage battery does not reach the low-voltage battery parameter set percentage, the auxiliary controller controls the second low-voltage relay a2 to close, and the third low-voltage relay A3 is opened after a delay of 15ms to 25 ms; when the SOC of the low-voltage battery reaches a low-voltage battery parameter set percentage, the auxiliary controller controls to open the first low-voltage relay A1, close the third low-voltage relay A3 and delay the opening of the second low-voltage relay A2 by 15ms to 25 ms.
The vehicle-mounted DCDC auxiliary control circuit described above, wherein preferably, the DCDC direct current converter, the low-voltage battery and the load terminal are all connected to a vehicle control unit, and the vehicle control unit interacts with the DCDC direct current converter, the low-voltage battery and the load terminal through a CAN bus.
The utility model provides a vehicle-mounted DCDC auxiliary control circuit, through the interaction of DCDC direct current converter, auxiliary control system, low voltage battery, can be according to load power, battery energy storage condition and power battery energy storage condition, the rational distribution low voltage power consumption tactics, the output condition of control DCDC to and the charge-discharge state of low voltage battery; the working conditions of the load, the power battery and the low-voltage storage battery can be judged, the power efficiency of the DCDC can be improved, the efficiency loss of electric energy is reduced, and the high-efficiency work of the DCDC is realized; the service life of the storage battery is prolonged by reasonably controlling the charging and discharging processes of the low-voltage storage battery; therefore, the DCDC output efficiency can be improved through reasonable sequential logic control, and the service life of the low-voltage storage battery is prolonged.
Drawings
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be further described with reference to the accompanying drawings, in which:
fig. 1 is a circuit diagram of an embodiment of an auxiliary control circuit for a vehicle-mounted DCDC provided by the present invention;
fig. 2 is an interaction schematic diagram of the DCDC direct-current converter, the low-voltage storage battery, the load end and the vehicle control unit.
Detailed Description
Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is in no way intended to limit the disclosure, its application, or uses. The present disclosure may be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that: the relative arrangement of parts and steps, the composition of materials, numerical expressions and numerical values set forth in these embodiments are to be construed as merely illustrative, and not as limitative, unless specifically stated otherwise.
As used in this disclosure, "first", "second": and the like, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element preceding the word comprises the element listed after the word, and does not exclude the possibility that other elements may also be included. "upper", "lower", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
In the present disclosure, when a specific component is described as being located between a first component and a second component, there may or may not be intervening components between the specific component and the first component or the second component. When it is described that a specific component is connected to other components, the specific component may be directly connected to the other components without having an intervening component, or may be directly connected to the other components without having an intervening component.
All terms (including technical or scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs unless specifically defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.
As shown in fig. 1, an embodiment of the present invention provides an on-vehicle DCDC auxiliary control circuit, which includes:
a first low-voltage relay a1, a second low-voltage relay a2, a third low-voltage relay A3, and a diode b1, wherein:
the first low-voltage relay A1 is arranged between the DCDC direct-current converter and the low-voltage storage battery;
the second low-voltage relay A2 is arranged between the DCDC direct-current converter and a load end;
the third low-voltage relay a3 and the diode b1 are provided between the low-voltage battery and the load terminal, and the anode of the diode b1 is connected to the low-voltage battery, and the cathode of the diode b1 is connected to the load terminal.
One end of the third low-voltage relay A3 is connected with the low-voltage storage battery, the other end of the third low-voltage relay A3 is connected with the anode of the diode b1, and the cathode of the diode b1 is connected with the load end.
Further, first low-voltage relay A1 with second low-voltage relay A2 is normally open relay, third low-voltage relay A3 is normally closed relay, guarantees that whole car can normally start to satisfy whole car start requirement.
Further, the open and closed states of the first low-voltage relay a1, the second low-voltage relay a2, and the third low-voltage relay A3 are controlled by an auxiliary controller.
Further, in the case where the first capacity of the low-voltage battery is lower than the SOC threshold S1, the auxiliary controller controls the first low-voltage relay a1 to be closed, the DCDC direct-current converter operates and charges the low-voltage battery; and the DCDC direct current converter is not started under the condition that the first collecting capacity of the low-voltage storage battery is higher than the SOC threshold value S1.
Further, in the case that the load current at the load terminal reaches the current threshold value S2, the auxiliary controller controls the second low-voltage relay a2 to close, so that the DCDC direct-current converter directly supplies power to the load terminal, and at the same time, delays 15ms to 25ms (for example, 20ms) to control the third low-voltage relay A3 to open. In a specific implementation, the current threshold S2 is set according to an optimal power interval of the DCDC.
Further, in the case where the load current at the load terminal reaches the current threshold S2 and the first low-voltage relay a1 is closed, if the SOC of the low-voltage battery is charged above a low-voltage battery parameter set percentage (e.g., 95%), the first low-voltage relay a1 is opened and the DCDC dc converter supplies power only to the load terminal.
Further, when the load current at the load end is smaller than the current threshold value S2, the first low-voltage relay a1 is in a closed state, and the SOC of the low-voltage battery does not reach the low-voltage battery parameter setting percentage, the auxiliary controller controls the second low-voltage relay a2 to be closed, and simultaneously delays 15ms to 25ms (for example, 20ms) to open the third low-voltage relay A3 until the SOC of the low-voltage battery reaches the low-voltage battery parameter setting percentage, and opens the first low-voltage relay a 1.
Further, when the load current at the load end is smaller than the current threshold value S2, if the SOC of the low-voltage battery does not reach the set percentage of the low-voltage battery parameters, the auxiliary controller controls the second low-voltage relay a2 to close, and delays for 15ms to 25ms (for example, 20ms) to open the third low-voltage relay A3; when the SOC of the low-voltage battery reaches a low-voltage battery parameter set percentage, the auxiliary controller controls to open the first low-voltage relay a1, and close the third low-voltage relay A3, delaying 15ms-25ms (e.g., 20ms) to open the second low-voltage relay a 2.
Further, as shown in fig. 2, the DCDC dc converter, the low-voltage battery and the load terminal are all connected to a Vehicle Control Unit (VCU), and the vehicle control unit interacts with the DCDC dc converter, the low-voltage battery and the load terminal through a CAN bus. As shown in fig. 2, the modules realize interaction and control through the CAN, the low-voltage battery feeds back the voltage condition to the VCU, the VCU determines the SOC condition of the low-voltage battery through the voltage, and at the same time, determines the SOC according to the SOC uploaded by the power battery, sends a signal to the DCDC and the auxiliary control system, and controls the relays of the first low-voltage relay a1, the second low-voltage relay a2 and the third low-voltage relay A3 through the CAN signal to control the on/off of the circuits from the DCDC dc converter to the load, from the DCDC converter to the battery and from the battery to the load, thereby realizing the switching of functions.
During working, firstly, the DCDC direct current converter collects the condition of the whole vehicle, judges whether to activate the DCDC direct current converter or not by judging the on-gear condition, collects the condition of the DCDC input voltage and judges whether to accord with the DCDC working condition or not;
after receiving the on-gear signal, the DCDC direct current converter collects the input DCDC voltage of the power battery, and reports an undervoltage fault if the voltage is undervoltage, so that the whole vehicle cannot be powered on; if the DCDC starting voltage is met and other faults do not exist, the DCDC is started to work;
collecting the SOC of the low-voltage storage battery, and setting a threshold value S1:
when the first capacity of the low-voltage storage battery is lower than S1, the auxiliary controller controls the first low-voltage relay A1 to be closed, and the DCDC works and charges the low-voltage storage battery;
when the first acquisition capacity of the low-voltage storage battery is higher than S1, the DCDC is not started;
collecting load current, setting a current threshold value S2:
when the load current reaches S2, the auxiliary controller controls the second low-voltage relay A2 to be closed, the DCDC directly supplies power to a load end, and the third low-voltage relay A3 is controlled to be opened after 20ms delay, so that the safety of the whole vehicle is prevented from being influenced by the low-voltage power failure, and meanwhile, the safety of the low-voltage storage battery is ensured due to the unidirectional current of a diode between the low-voltage storage battery and the load;
simultaneously collecting the SOC of the low-voltage storage battery and judging the starting condition of the DCDC; after the first low-voltage relay A1 is closed, when the SOC of the low-voltage storage battery is charged to more than 95%, the auxiliary controller controls the first low-voltage relay A1 to be switched off, and the DCDC only supplies power to a load end; when the load current is less than S2, if the SOC of the low-voltage battery is less than 95%, the auxiliary controller controls the second low-voltage relay A2 to be closed, the third low-voltage relay A3 is opened after 20ms delay until the SOC of the low-voltage battery reaches 95%, and the first low-voltage relay A1 is opened;
when the load current is less than S2, if the SOC of the low-voltage battery is less than 95%, the auxiliary controller controls the second low-voltage relay A2 to be closed, and the third low-voltage relay A3 is opened after 20ms delay; when the low-voltage battery SOC reaches 95%, the auxiliary controller controls to open the first low-voltage relay A1, close the third low-voltage relay A3 and open the second low-voltage relay A2 with a delay of 20 ms.
The embodiment of the utility model provides a vehicle-mounted DCDC auxiliary control circuit, through the interaction of DCDC direct current converter, auxiliary control system, low pressure battery, can be according to load power, battery energy storage condition and power battery energy storage condition, the rational distribution low pressure power consumption tactics, the output condition of control DCDC to and the charge-discharge state of low pressure battery; the working conditions of the load, the power battery and the low-voltage storage battery can be judged, the power efficiency of the DCDC can be improved, the efficiency loss of electric energy is reduced, and the high-efficiency work of the DCDC is realized; the service life of the storage battery is prolonged by reasonably controlling the charging and discharging processes of the low-voltage storage battery; therefore, the DCDC output efficiency can be improved through reasonable sequential logic control, and the service life of the low-voltage storage battery is prolonged.
Thus, various embodiments of the present disclosure have been described in detail. Some details well known in the art have not been described in order to avoid obscuring the concepts of the present disclosure. It will be fully apparent to those skilled in the art from the foregoing description how to practice the presently disclosed embodiments.
Although some specific embodiments of the present disclosure have been described in detail by way of example, it should be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the present disclosure. It will be understood by those skilled in the art that various changes may be made in the above embodiments or equivalents may be substituted for elements thereof without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.
Claims (10)
1. An on-board DCDC auxiliary control circuit, comprising:
a first low-voltage relay a1, a second low-voltage relay a2, a third low-voltage relay A3, and a diode b1, wherein:
the first low-voltage relay A1 is arranged between the DCDC direct-current converter and the low-voltage storage battery;
the second low-voltage relay A2 is arranged between the DCDC direct-current converter and a load end;
the third low-voltage relay a3 and the diode b1 are provided between the low-voltage battery and the load terminal, and the anode of the diode b1 is connected to the low-voltage battery, and the cathode of the diode b1 is connected to the load terminal.
2. The on-vehicle DCDC auxiliary control circuit according to claim 1, wherein one end of the third low-voltage relay A3 is connected to the low-voltage battery, the other end of the third low-voltage relay A3 is connected to an anode of the diode b1, and a cathode of the diode b1 is connected to the load terminal.
3. The on-vehicle DCDC auxiliary control circuit of claim 1, characterized in that, said first low-voltage relay A1 and said second low-voltage relay A2 are normally open relays, and said third low-voltage relay A3 is a normally closed relay.
4. The on-vehicle DCDC auxiliary control circuit of claim 3, characterized in that, the on-off state of said first low-voltage relay A1, said second low-voltage relay A2 and said third low-voltage relay A3 is controlled by an auxiliary controller.
5. The on-vehicle DCDC auxiliary control circuit of claim 4, wherein in case that the first capacity of said low-voltage battery is lower than SOC threshold S1, said auxiliary controller controls said first low-voltage relay A1 to close, said DCDC DC converter operates and charges said low-voltage battery; and the DCDC direct current converter is not started under the condition that the first collecting capacity of the low-voltage storage battery is higher than the SOC threshold value S1.
6. The vehicle-mounted DCDC auxiliary control circuit according to claim 4, characterized in that, in case that the load current at said load terminal reaches current threshold S2, said auxiliary controller controls said second low-voltage relay A2 to close, so that said DCDC DC converter directly supplies power to said load terminal, and simultaneously controls said third low-voltage relay A3 to open with a delay of 15ms-25 ms.
7. The on-board DCDC auxiliary control circuit of claim 6, wherein in case that the load current at said load terminal reaches a current threshold S2 and said first low voltage relay A1 is closed, if the SOC of said low voltage battery is charged above a low voltage battery parameter set percentage, said first low voltage relay A1 is opened and said DCDC DC converter supplies power only to said load terminal.
8. The vehicle-mounted DCDC auxiliary control circuit according to claim 6, characterized in that when said load current at said load end is less than current threshold S2, said first low voltage relay A1 is in closed state, and SOC of said low voltage battery does not reach low voltage battery parameter set percentage, auxiliary controller controls said second low voltage relay A2 to close, and simultaneously opens said third low voltage relay A3 with delay of 15ms-25ms, until SOC of said low voltage battery reaches low voltage battery parameter set percentage, and opens said first low voltage relay A1.
9. The vehicle-mounted DCDC auxiliary control circuit according to claim 6, characterized in that when the load current at said load end is less than current threshold S2, if the SOC of the low-voltage battery does not reach the low-voltage battery parameter set percentage, the auxiliary controller controls said second low-voltage relay A2 to close, and delays for 15ms-25ms to open said third low-voltage relay A3; when the SOC of the low-voltage battery reaches a low-voltage battery parameter set percentage, the auxiliary controller controls to open the first low-voltage relay A1, close the third low-voltage relay A3 and delay the opening of the second low-voltage relay A2 by 15ms to 25 ms.
10. The vehicle-mounted DCDC auxiliary control circuit according to claim 1, wherein said DCDC DC converter, said low-voltage battery and said load terminal are connected to a vehicle control unit, and said vehicle control unit interacts with said DCDC DC converter, said low-voltage battery and said load terminal through a CAN bus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220974972.0U CN217124600U (en) | 2022-04-24 | 2022-04-24 | Vehicle-mounted DCDC auxiliary control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220974972.0U CN217124600U (en) | 2022-04-24 | 2022-04-24 | Vehicle-mounted DCDC auxiliary control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217124600U true CN217124600U (en) | 2022-08-05 |
Family
ID=82651172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220974972.0U Active CN217124600U (en) | 2022-04-24 | 2022-04-24 | Vehicle-mounted DCDC auxiliary control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217124600U (en) |
-
2022
- 2022-04-24 CN CN202220974972.0U patent/CN217124600U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101373904B (en) | Automobile power supply system and control method thereof | |
| US7923866B2 (en) | Power supply system and vehicle including the same, and method of controlling the same | |
| CN110429671B (en) | High-adaptability charging system and method for electric automobile | |
| CN111703336A (en) | Power-off control system and control method of fuel cell vehicle | |
| US20080067974A1 (en) | Electric Car Charging Systems | |
| CN108340856A (en) | A kind of new-energy automobile power supply system for cancelling A-battery | |
| CN112590616B (en) | High-voltage loop of power battery of electric automobile and control method of high-voltage loop | |
| CN210792823U (en) | Electric automobile charging system and electric automobile | |
| KR20120062956A (en) | High voltage system of electric vehicles | |
| CN102223092B (en) | Trickle charger for high-energy storage systems | |
| CN106208699B (en) | A kind of mixed energy storage system DC converter and its control method based on Buck/Boost circuit | |
| CN112659969A (en) | Double-branch power battery control system and method | |
| CN112072740A (en) | Undervoltage starting circuit of low-voltage storage battery of electric automobile and control method of undervoltage starting circuit | |
| CN116572767A (en) | Charging and discharging control method and control system | |
| CN108736531A (en) | Power battery pack, composite power source, control method and vehicle | |
| CN112793421B (en) | Storage battery power shortage prevention control system, electric vehicle and storage battery power shortage prevention control method | |
| CN211567861U (en) | Automatic power supply device for storage battery of electric vehicle | |
| CN217124600U (en) | Vehicle-mounted DCDC auxiliary control circuit | |
| CN116247711A (en) | Energy storage system based on load priority control | |
| CN215883385U (en) | Battery pack, battery management system and vehicle | |
| CN112208381B (en) | New energy automobile charging system control circuit and control method | |
| CN108695972B (en) | Switching circuit, system and method for controlling power supply of power changing station, controller and medium | |
| CN110682827A (en) | Electric automobile auxiliary power supply of double cell system | |
| CN206106980U (en) | Connection charging loops of new energy automobile low pressure battery | |
| CN220973933U (en) | Hybrid energy distribution control system and vehicle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |