CN218141129U - Power supply system of power battery thermal management system and vehicle - Google Patents
Power supply system of power battery thermal management system and vehicle Download PDFInfo
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- CN218141129U CN218141129U CN202221006718.8U CN202221006718U CN218141129U CN 218141129 U CN218141129 U CN 218141129U CN 202221006718 U CN202221006718 U CN 202221006718U CN 218141129 U CN218141129 U CN 218141129U
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- power supply
- air conditioner
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The utility model relates to a power supply system and vehicle of power battery thermal management system belongs to electric vehicle power device field, when the vehicle charges, if detect power battery and have the thermal management demand, then the control power awakens the controller up, and controller control DCDC work, DCDC convert power battery's high tension electricity into low-voltage electricity, supplies power to the air conditioner through the power supply line of battery, and then alright manage the thermal management to power battery through the air conditioner. The special air conditioner DCDC for the vehicle is cancelled, the power battery is used for supplying power to the air conditioner through the original DCDC on the whole vehicle, the problem that the special air conditioner DCDC for the vehicle does not have a layout space is solved, the cost is saved, and the weight of the whole vehicle is reduced.
Description
Technical Field
The utility model relates to a power supply system and vehicle of power battery thermal management system belongs to electric vehicle power device field.
Background
The requirement of a power battery (lithium battery) on the temperature of the power battery is high during charging and discharging, particularly during charging, the activity of lithium ions is greatly reduced at low temperature, so that the charging speed is influenced, and meanwhile, the forced high-power charging at low temperature can cause lithium precipitation and crystallization in a battery core and cause irreversible damage to the lithium ion battery; excessive temperature can accelerate energy attenuation of the battery and even cause explosion, and rapid charging can cause the battery to generate heat, thereby causing temperature rise.
In order to ensure that the power battery is at a proper temperature during charging, the power battery is usually provided with a thermal management system, and the thermal management system has multiple modes, wherein the modes include air cooling and liquid cooling for cooling, liquid heating for heating, self electric heating and the like. In the prior art, the power battery is subjected to heat management in a liquid cooling and liquid heating mode, an air conditioning system and a PTC heater refrigerate and heat cooling liquid, and the cooling liquid circularly enters the power battery, so that an air conditioner is required to work during charging. The power consumption of the air conditioner of the small vehicle and other low-voltage appliances is relatively low, and the DCDC can meet the power supply requirement. However, the DCDC is controlled by the VCU main fire, and a circuit is connected to the main fire, so that power cannot be supplied when the heat management requirement of the battery exists, otherwise, the vehicle main fire equipment can be completely operated, and a screen and a guideboard are lightened. It is necessary to install a dedicated DCDC for the air conditioner.
The power battery thermal management system with the special DCDC is shown in figure 1, and comprises an air conditioner and a power battery thermal management system power supply system, a charging low-voltage control power supply is connected with an air conditioner control panel in a power supply mode, the air conditioner control panel is connected with the air conditioner DCDC and the air conditioner in a control mode, a battery thermal management module in the air conditioner is used for refrigerating or heating a power battery through a refrigerating system in the air conditioner or a PTC heating system arranged outside the air conditioner, the power battery is connected with the DCDC and the air conditioner DCDC, the air conditioner DCDC converts high-voltage electricity of the power battery into low-voltage electricity to supply power to connect the air conditioner, and a VCU is connected with the DCDC in a control mode. And a power supply line connected with the low-voltage storage battery is sequentially provided with a mechanical switch, a main fire relay and an ON fire relay in series. A power supply line between the mechanical switch and the main fire relay is connected with normally fired electric equipment, wherein the normally fired electric equipment is one of low-voltage power supply gears of the vehicle, is directly powered by a low-voltage storage battery, is not controlled by other switches, and is usually used for supplying power to the low-voltage electric equipment which needs to be standby when the vehicle is statically parked; a power supply line between the main fire relay and the ON fire relay is connected with main fire electric equipment, wherein the main fire is one of low-voltage power supply gears of the vehicle and is controlled by the main fire relay, and the main fire relay is switched ON and then powers ON the connected low-voltage electric equipment; and a power supply line between the main fire relay and the ON fire relay is connected with a VCU, a DCDC and an air conditioner control panel.
The control flow of the system shown in fig. 1 is as follows: after the mechanical switch that low pressure battery connects is closed, the closed a moment of total live relay, the low pressure battery power supply awakens up VCU, VCU control DCDC starts, and power battery power supply connection DCDC is higher than low pressure battery voltage, therefore DCDC begins to supply power for the circuit, and DCDC converts power battery's high tension electricity into the low pressure power supply line that supplies the low pressure battery place, for the power supply of normal fire consumer and total live consumer. When the DCDC is not started, the charging low-voltage control power supply is in power supply connection with the air conditioner control panel; and after the DCDC is started, connecting the air conditioner control panel by using the DCDC power supply. The air conditioner control panel controls the air conditioner DCDC to convert high-voltage electricity of the power battery into low-voltage electricity to supply power to connect the air conditioner, and the air conditioner control battery thermal management module refrigerates or heats the power battery.
However, since a small vehicle layout space, especially when an air conditioner is built in, has no air-conditioning exclusive space, the DCDC is not easily installed and the cost is high.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a power supply system and vehicle of power battery thermal management system for solve the inside not enough space arrangement special DCDC of air conditioner and the special DCDC of air conditioner problem with high costs of vehicle.
In order to achieve the above object, the present invention provides a solution and corresponding advantageous effects including:
the utility model discloses a power supply system of a power battery thermal management system, which comprises a DCDC, a power battery, a control power supply and a controller; the power battery is connected with one end of the DCDC; the controller is connected with the DCDC in a control mode and comprises an interface used for controlling and connecting an air conditioner, and the air conditioner is used for carrying out thermal management on the power battery; the other end of the DCDC is connected with the air conditioner through a power supply line of the storage battery.
The beneficial effects of the above technical scheme are: the utility model provides a pair of power battery thermal management system's power supply system when the vehicle charges, if it has the thermal management demand to detect power battery, then the control power awakens the controller up, and controller control DCDC work, DCDC convert power battery's high-tension electricity into low-voltage electricity, supplies power to the air conditioner through the power supply line of battery, and then alright carry out the thermal management to power battery through the air conditioner.
The utility model discloses cancelled the dedicated air conditioner DCDC of vehicle, utilized power battery to supply power through original DCDC air conditioner on whole car, solved the dedicated air conditioner DCDC of vehicle and had not had the problem of arranging the space to practice thrift the cost, alleviateed whole car weight simultaneously.
The power supply system of the power battery thermal management system further comprises a storage battery, a mechanical switch, a main fire switch and an ON fire switch are sequentially arranged ON a power supply circuit connected with a power supply output end of the storage battery in series, a normal fire power supply interface used for supplying power and connecting normal fire electric equipment is arranged ON the power supply circuit between the mechanical switch and the main fire switch, and a main fire power supply interface used for supplying power and connecting the main fire electric equipment is arranged ON the power supply circuit between the main fire switch and the ON fire switch; the main fire power supply interface supplies power to be connected with the controller, and the other end of the DCDC is used for being connected with an air conditioner through a power supply line between the mechanical switch and the main fire switch.
The beneficial effects of the above technical scheme are: the other end of the DCDC is connected to a power supply circuit of the storage battery, and when the DCDC is used for converting high-voltage electricity of the power battery into low-voltage electricity to supply power to the air conditioner, normal fire electric equipment and total fire electric equipment on a power supply circuit of the storage battery can be supplied with power. And the DCDC and the air conditioner are connected on a power supply circuit before a main fire switch, so that the operation of other main fire low-voltage electrical appliances caused by the operation of the DCDC and the air conditioner is avoided.
Further, the controller comprises a vehicle control unit and an air conditioner control panel, the low-voltage control power supply is connected with the vehicle control unit and the air conditioner control panel, the vehicle control unit is connected with the DCDC in a control mode, and the air conditioner control panel comprises an interface used for being connected with an air conditioner in a control mode.
The beneficial effects of the above technical scheme are: the whole vehicle controller and the air conditioner control panel are used for controlling the DCDC and the air conditioner respectively, the DCDC and the air conditioner can work independently, and the air conditioner starts to work only when the power battery is detected to have a heat management requirement, so that resources are saved.
Further, the main fire switch is a main fire relay; the ON fire switch is an ON fire relay.
The utility model also provides a vehicle, including the vehicle body, still include power battery thermal management system, power battery thermal management system includes the power supply system of air conditioner and power battery thermal management system, power battery thermal management system's power supply system includes DCDC, power battery, control power and controller; the power battery is connected with one end of the DCDC; the controller is connected with the DCDC in a control mode and comprises an interface used for controlling and connecting an air conditioner, and the air conditioner is used for carrying out thermal management on the power battery; the other end of the DCDC is connected with the air conditioner through a power supply line of the storage battery.
The beneficial effects of the above technical scheme are: the utility model provides a vehicle is when charging, if it has the heat management demand to detect power battery, then the control power supply awakens the controller up, and controller control DCDC work, DCDC convert power battery's high-tension electricity into low-voltage electricity, supplies power to the air conditioner through the power supply line of battery, and then alright carry out the heat management to power battery through the air conditioner.
The utility model discloses cancelled the dedicated air conditioner DCDC of vehicle, utilized power battery to supply power through original DCDC air conditioner on putting in order the car, solved the dedicated air conditioner DCDC of vehicle and had not had the problem of arranging the space to practice thrift the cost, alleviateed whole car weight simultaneously.
The power supply system of the power battery thermal management system further comprises a storage battery, a mechanical switch, a main fire switch and an ON fire switch are sequentially arranged ON a power supply circuit connected with a power supply output end of the storage battery in series, a normal fire power supply interface used for supplying power and connecting normal fire electric equipment is arranged ON the power supply circuit between the mechanical switch and the main fire switch, and a main fire power supply interface used for supplying power and connecting the main fire electric equipment is arranged ON the power supply circuit between the main fire switch and the ON fire switch; the main fire power supply interface supplies power to be connected with the controller, and the other end of the DCDC is used for being connected with an air conditioner through a power supply line between the mechanical switch and the main fire switch.
The beneficial effects of the above technical scheme are: the other end of the DCDC is connected to a power supply circuit of the storage battery, and when the DCDC is used for converting high-voltage electricity of the power battery into low-voltage electricity to supply power to the air conditioner, normal fire electric equipment and total fire electric equipment on a power supply circuit of the storage battery can be supplied with power. And the DCDC and the air conditioner are connected on a power supply circuit before a main fire switch, so that the operation of other main fire low-voltage electrical appliances caused by the operation of the DCDC and the air conditioner is avoided.
Further, the controller comprises a vehicle controller and an air conditioner control panel, the low-voltage control power supply is connected with the vehicle controller and the air conditioner control panel, the vehicle controller is connected with the DCDC in a control mode, and the air conditioner control panel comprises an interface used for being connected with an air conditioner in a control mode.
Furthermore, the heat management system also comprises a heating system for heating the power battery, the air conditioner comprises a heat management module and a refrigerating system, and the heat management module controls the heating system and the refrigerating system to work so as to realize the heat management of the power battery.
The beneficial effects of the above technical scheme are: the cooling system and the heating system are controlled by the heat management module to realize the cooling and heating of the power battery so as to ensure the safety of the power battery in the working process of the vehicle.
Further, the main fire switch is a main fire relay; the ON fire switch is an ON fire relay.
Further, the heating system is a PTC heating system.
Drawings
FIG. 1 is a schematic diagram of a prior art power cell thermal management system;
fig. 2 is a schematic diagram of a power battery thermal management system of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
The embodiment of the system is as follows:
the utility model provides a new power battery thermal management system's power supply system, with the dedicated DCDC cancellation of air conditioner, use the DCDC power supply of whole car, for guaranteeing the air conditioner and give passenger's district refrigeration when whole car goes up the electric operation, do the thermal management for power battery when whole car shuts down and charges, need guarantee that DCDC can both work and provide low voltage power supply for the air conditioner when whole car goes up the electricity and the vehicle charges. The DCDC is controlled by a VCU (VCU, namely a vehicle controller), the air conditioning system is controlled by an air conditioning control panel, and in order to ensure that the DCDC and the air conditioner can work when the vehicle is electrified and charged, the VCU and the air conditioning control panel need to be connected with a main ignition power supply and a charging power supply. In order to ensure that the main fire relay is disconnected when the vehicle is charged, the DCDC and the air conditioner do not cause other main fire low-voltage electric appliances to work, and therefore the DCDC and the air conditioner are connected into a circuit before moving to the main fire relay.
Specifically, as shown in fig. 2, the air conditioner DCDC dedicated to the air conditioner is cancelled, the charging low-voltage control power supply is connected with the VCU and the air conditioner control panel, the air conditioner control panel is connected with the air conditioner in a control manner, the VCU is connected with the DCDC in a control manner, and one end of the DCDC is connected with the power battery to convert the high voltage of the power battery into the low voltage. The power supply line at the power supply end of the low-voltage storage battery is sequentially provided with a mechanical switch, a total fire relay and an ON fire relay in series, the power supply line between the mechanical switch and the total fire relay is connected with a normal fire electric device, the power supply line between the total fire relay and the ON fire relay is connected with a total fire electric device, and the power supply line ON the downstream of the ON fire relay is connected with an ON fire electric device. The other end of the DCDC is connected to a power supply line between the mechanical switch and the main fire relay, and an air conditioner is further connected to the power supply line between the mechanical switch and the main fire relay. The power battery heat management system is also provided with a PTC heating system for heating the power battery, a battery heat management module and a refrigerating system are arranged in the air conditioner, and the battery heat management module in the air conditioner refrigerates or heats the power battery by controlling the refrigerating system in the air conditioner or the PTC heating system externally arranged outside the air conditioner so as to realize the heat management of the power battery.
The low-voltage control power supply in fig. 2 is a low-voltage power supply provided during the charging phase of the power battery, and is provided by a charging gun or a vehicle BMS (battery management system) and is used for supplying power to the VCU and the air conditioner control panel when the low-voltage power supply system of the vehicle is turned off (a main fire relay or even a mechanical switch is turned off, and at this time, the low-voltage storage battery and the entire vehicle DCDC cannot provide the low-voltage power supply for the entire vehicle), so that the VCU and the air conditioner control panel can receive the heat management requirement and control the entire vehicle DCDC and the air conditioner to work.
The control flow of the system shown in fig. 2 is as follows: when the vehicle charges the power battery, the main fire relay is disconnected, the BMS detects that the power battery needs to be subjected to heat management, the charging low-voltage control power supply wakes up the VCU, the VCU controls the DCDC to start working, and the DCDC converts the high voltage of the power battery into low voltage and supplies power to the air conditioner through the power supply line of the low-voltage storage battery. Meanwhile, the charging low-voltage control power supply is connected with the air conditioner control panel in a power battery charging process, and the air conditioner control panel controls the air conditioner to realize the heat management of the power battery.
When the vehicle does not charge the power battery, the BMS detects that the power battery needs to be thermally managed, the mechanical switch and the main fire relay are closed, the VCU is awakened by the low-voltage storage battery for power supply, the VCU controls the DCDC to work, the voltage value of the DCDC converting the high voltage of the power battery into the low voltage is higher than the voltage of the low-voltage storage battery, and the DCDC is used for supplying power for normal fire electric equipment, an air conditioner, the main fire electric equipment, the VCU and the air conditioner control panel so as to realize the thermal management of the power battery and the normal work of the whole vehicle.
Generally, DCDC inserts low-voltage circuit before total fire relay, can guarantee when the vehicle charges that total fire relay breaks off, and other total fire equipment of whole car can not work, have avoided external manifestations such as screen lightening, and the equipment of always firing before total fire relay is the standby device itself, therefore does not influence its operating condition during DCDC work. The VCU and the air conditioner control panel are additionally connected with a charging low-voltage control power supply besides the original main fire power supply, so that when a vehicle is charged, the main fire relay is disconnected, the VCU and the air conditioner control panel can work, and the thermal management requirement of the power battery is received. When the vehicle is charged, the main fire relay is disconnected, the main fire electric equipment does not work, the charging low-voltage control unit controls the power supply to be powered on, so that the VCU and the air conditioner control panel are in standby, when the thermal management requirement of the power battery is received, the VCU controls the DCDC to work, the air conditioner control panel controls the battery thermal management module in the air conditioner to work, and the thermal management is provided for the power battery; when the vehicle charging is finished, the VCU controls the DCDC to be powered off, and the air conditioner stops working at the moment. When the whole vehicle is normally powered on, the main fire relay is closed, the VCU and the air conditioner control panel obtain power from the main fire to start working, the VCU controls the DCDC to work to provide low voltage electricity for the whole vehicle, and the air conditioner control panel controls the temperature of a passenger area according to the operation of a client.
The embodiment of the vehicle is as follows:
the utility model also provides a vehicle, including the vehicle body, still include power battery thermal management system, power battery thermal management system includes air conditioner and power battery thermal management system's power supply system, and power battery thermal management system's power supply system utilizes the air conditioner to realize power battery's thermal management to the air conditioner power supply. The power supply system of the power battery thermal management system is already described in the system embodiment, and is not described herein again.
Claims (10)
1. A power supply system of a power battery thermal management system comprises a DCDC, a power battery, a control power supply and a controller; the power battery is connected with one end of the DCDC; the controller is connected with the DCDC in a control mode and comprises an interface used for controlling and connecting an air conditioner, and the air conditioner is used for carrying out thermal management on the power battery; the air conditioner is characterized in that the control power supply is connected with the controller, and the other end of the DCDC is connected with the air conditioner through a power supply line of the storage battery.
2. The power supply system of the power battery thermal management system according to claim 1, wherein the power supply system of the power battery thermal management system further comprises a storage battery, a mechanical switch, a main fire switch and an ON fire switch are sequentially arranged ON a power supply line connected with a power supply output end of the storage battery in series, and a main fire power supply interface for supplying power to and connecting with main fire electric equipment is arranged ON the power supply line between the main fire switch and the ON fire switch; the main fire power supply interface supplies power to be connected with the controller, and the other end of the DCDC is used for being connected with an air conditioner through a power supply line between the mechanical switch and the main fire switch.
3. The power supply system of the power battery thermal management system according to claim 1 or 2, wherein the controller comprises a vehicle control unit and an air conditioner control panel, the low-voltage control power supply is connected with the vehicle control unit and the air conditioner control panel, the vehicle control unit is connected with the DCDC in a control mode, and the air conditioner control panel comprises an interface for controlling and connecting an air conditioner.
4. The power supply system of the power battery thermal management system according to claim 2, wherein the main fire switch is a main fire relay; the ON fire switch is an ON fire relay.
5. A vehicle comprises a vehicle body and a power battery thermal management system, wherein the power battery thermal management system comprises an air conditioner and a power supply system of the power battery thermal management system, and the power supply system of the power battery thermal management system comprises a DCDC, a power battery, a control power supply and a controller; the power battery is connected with one end of the DCDC; the controller is connected with the DCDC in a control mode and comprises an interface used for controlling and connecting an air conditioner, and the air conditioner is used for carrying out thermal management on the power battery; the air conditioner is characterized in that the control power supply is connected with the controller, and the other end of the DCDC is connected with the air conditioner through a power supply line of the storage battery.
6. The vehicle according to claim 5, characterized in that the power supply system of the power battery thermal management system further comprises a storage battery, a mechanical switch, a main fire switch and an ON fire switch are sequentially arranged ON a power supply circuit connected with the power supply output end of the storage battery in series, and a main fire power supply interface for supplying power to and connecting with main fire electric equipment is arranged ON the power supply circuit between the main fire switch and the ON fire switch; the main fire power supply interface supplies power to be connected with the controller, and the other end of the DCDC is used for being connected with an air conditioner through a power supply line between the mechanical switch and the main fire switch.
7. The vehicle of claim 5, characterized in that the controller comprises a vehicle control unit and an air conditioner control panel, the low-voltage control power supply is connected with the vehicle control unit and the air conditioner control panel, the vehicle control unit is connected with the DCDC in a control mode, and the air conditioner control panel comprises an interface used for being connected with an air conditioner in a control mode.
8. The vehicle according to any one of claims 5 to 7, wherein the thermal management system further comprises a heating system for heating the power battery, the air conditioner comprises a thermal management module and a cooling system, and the thermal management module controls the heating system and the cooling system to work to realize thermal management of the power battery.
9. The vehicle of claim 6, characterized in that the main fire switch is a main fire relay; the ON fire switch is an ON fire relay.
10. The vehicle of claim 8, wherein the heating system is a PTC heating system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221006718.8U CN218141129U (en) | 2022-04-24 | 2022-04-24 | Power supply system of power battery thermal management system and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221006718.8U CN218141129U (en) | 2022-04-24 | 2022-04-24 | Power supply system of power battery thermal management system and vehicle |
Publications (1)
| Publication Number | Publication Date |
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| CN218141129U true CN218141129U (en) | 2022-12-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221006718.8U Active CN218141129U (en) | 2022-04-24 | 2022-04-24 | Power supply system of power battery thermal management system and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218141129U (en) |
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2022
- 2022-04-24 CN CN202221006718.8U patent/CN218141129U/en active Active
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