All-in-one driven battery thermal management system

Abstract

The utility model relates to an all-in-one driven battery thermal management system, which belongs to the technical field of electric heavy trucks and comprises a rack, and an electrical system, a water circulation system and a refrigerating system are arranged on the rack. The refrigerating system comprises a compressor, a condenser, an electronic fan and an expansion valve, and the compressor, the condenser and the expansion valve are sequentially connected through pipelines; the water circulation system comprises an electronic water pump and an evaporator, an input port of the electronic water pump is connected with a water inlet pipe, and an output port of the evaporator is connected with a water outlet pipe. A high-voltage electronic fan and an electronic water pump are adopted, so that the current of a power supply line is smaller, the power output is more stable, and the electric loss is smaller; the electronic fan and the electronic water pump are moved out of the built-in driving plate and are changed into pure motor structures, so that the high-temperature resistance is better; the cost of the electronic fan and the electronic water pump is reduced.

Description

Technical Field

[0001] This utility model relates to a multi-functional battery thermal management system, belonging to the field of electric heavy truck technology. Background Technology

[0002] With increasing global emphasis on environmental protection and energy transition, the new energy vehicle industry has experienced rapid development. Heavy-duty trucks, as a crucial component of the transportation sector, are also showing a growing trend towards electrification. New energy vehicles, especially electric vehicles, with their advantages of zero emissions, low noise, and high energy efficiency, are becoming an important direction for future transportation development.

[0003] In electric vehicles, the battery is a core component, and its performance directly affects the overall vehicle performance. However, batteries generate a significant amount of heat during operation. If this heat cannot be dissipated in a timely manner, the battery temperature will rise, impacting its performance, lifespan, and safety. Therefore, battery thermal management technology is crucial for electric vehicles and heavy-duty electric trucks.

[0004] Chinese utility model patent CN209993703U discloses a thermal management device for a pure electric heavy-duty truck battery, including a coolant circulation cooling assembly and a refrigerant circulation cooling assembly installed within the frame. The coolant circulation cooling assembly and the refrigerant circulation cooling assembly are connected via a plate heat exchanger. The coolant circulation cooling assembly includes an electric water pump, the outlet of which is connected to the plate heat exchanger and an outlet pipe assembly via pipes; the inlet of the electric water pump is connected to an inlet pipe assembly. The refrigerant circulation cooling assembly includes a condenser, the inlet of which is connected to an electric compressor and the outlet of the plate heat exchanger via pipes; the outlet of the condenser is connected to a dryer bottle, an expansion valve, and the inlet of the plate heat exchanger via pipes; a condensing fan is installed in front of the condenser. This device has a compact structure, is easy to install in different combinations, adapts to different environments, enables the battery pack to dissipate heat quickly, improves temperature control, and keeps the battery pack operating within its normal temperature range. However, in existing technologies, each core electrical component is powered and controlled separately. That is, the compressor is equipped with a dedicated driver to adjust the speed, and a DC-DC module (a device that converts electrical energy of one voltage value to electrical energy of another voltage value in a DC circuit) outputs 24VDC power to power the electronic condenser fan and electronic water pump. The speed is then adjusted by its built-in drive board. This has the following drawbacks:

[0005] 1. Numerous electronic component modules and complex wiring;

[0006] 2. A DC-DC module is required. The conversion of electricity will result in more energy loss, and high temperature will also limit the power output. The fan wires and water pump wiring harnesses need to use thicker copper wires and are prone to overcurrent protection shutdown.

[0007] 3. The built-in drive board of the fan and water pump is prone to frequency reduction and shutdown under high temperature conditions, or even damage, increasing the number of maintenance times;

[0008] 4. Low-voltage electronic fans and water pumps require speed control drive boards, which are expensive.

[0009] Therefore, there is a need for an all-in-one battery thermal management system that reduces the number of electrical components, minimizes electrical damage, improves temperature resistance, and lowers costs. Utility Model Content

[0010] The technical problem to be solved by this utility model is: in order to overcome the shortcomings of the prior art, to provide an all-in-one driven battery thermal management system that reduces the number of electrical components, reduces electrical damage, improves temperature resistance, and reduces costs.

[0011] The technical solution adopted by this utility model to solve the above problems is: a multi-in-one driven battery thermal management system, including a frame, on which an electrical system, a water circulation system and a refrigeration system are arranged;

[0012] The refrigeration system includes a compressor, a condenser, an electric fan, and an expansion valve, which are connected in sequence by pipes.

[0013] The water circulation system includes an electronic water pump and an evaporator. The inlet of the electronic water pump is connected to the inlet pipe, and the outlet of the evaporator is connected to the outlet pipe. The outlet of the electronic water pump is connected to the inlet of the evaporator through a connecting pipe.

[0014] The electrical system includes a driver and a controller, which are electrically connected to each other, including a compressor, an electric fan, and an electric water pump.

[0015] Preferably, both the inlet pipe and the outlet pipe are equipped with temperature sensors.

[0016] Preferably, pressure sensors are installed on both the inlet pipe and the outlet pipe.

[0017] Preferably, the evaporator and expansion valve are integrated into a single unit.

[0018] Preferably, multiple electronic fans are provided.

[0019] Preferably, the number of electronic fans is two.

[0020] Preferably, the condenser is a parallel flow condenser.

[0021] Preferably, the expansion valve is a balanced thermostatic expansion valve.

[0022] Preferably, the flow rate of the electronic water pump is greater than 6000 L / h.

[0023] Preferably, the frame is made of stainless steel.

[0024] Compared with the prior art, the advantages of this utility model are:

[0025] 1. The compressor, electric fan, and electric water pump are integrated into one unit, reducing the number of electrical components;

[0026] 2. High-voltage electronic fans and electronic water pumps are used, resulting in lower power line current, more stable power output, and less power loss;

[0027] 3. The electronic fan and electronic water pump have been moved out of the built-in drive board and replaced with a pure motor structure, which has better high temperature resistance.

[0028] 4. Reduced costs for electronic fans and electronic water pumps. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of a multi-functional battery thermal management system according to the present invention.

[0030] Figure 2 This is an electrical schematic diagram of a multi-functional battery thermal management system according to the present invention.

[0031] The components include: frame 1, compressor 2, condenser 3, electric fan 4, expansion valve 5, pipe 6, electric water pump 7, evaporator 8, inlet pipe 9, outlet pipe 10, connecting pipe 11, driver 12, and controller 13. Detailed Implementation

[0032] like Figure 1-2 As shown, an all-in-one driven battery thermal management system in this embodiment includes a frame 1, which is made of stainless steel, and an electrical system, a water circulation system and a refrigeration system are installed on the frame 1.

[0033] The refrigeration system includes a compressor 2, a condenser 3, an electric fan 4, and an expansion valve 5. The compressor 2, condenser 3, and expansion valve 5 are connected in sequence through a pipe 6. The condenser 3 is a parallel flow condenser 3, and the expansion valve 5 is a balanced thermostatic expansion valve 5.

[0034] The water circulation system includes an electronic water pump 7 and an evaporator 8. The input port of the electronic water pump 7 is connected to the water inlet pipe 9, the output port of the evaporator 8 is connected to the water outlet pipe 10, and the output port of the electronic water pump 7 is connected to the input port of the evaporator 8 through a connecting pipe 11.

[0035] Among them, the evaporator 8 and the expansion valve 5 are integrated into one unit, and the evaporator 8 and the expansion valve 5 together form a chiller.

[0036] The electrical system includes a driver 12 and a controller 13. The driver 12, controller 13, compressor 2, electric fan 4 and electric water pump 7 are electrically connected. The driver 12 is directly responsible for driving and controlling the compressor 2, electric fan 4 and electric water pump 7, and the controller 13 is responsible for detecting and adjusting the overall operating status of the machine.

[0037] The flow rate of the electronic water pump 7 is greater than 6000 L / h;

[0038] Multiple electronic fans 4 are provided, and the multiple electronic fans 4 are arranged side by side. The specific number of electronic fans 4 is two.

[0039] Temperature sensors and pressure sensors are installed on both the inlet pipe 9 and the outlet pipe 10 to detect the coolant circulation temperature and pressure, ensuring stable system operation.

[0040] Working principle:

[0041] When the all-in-one battery thermal management system starts its cooling function, compressor 2, electric fan 4, and electric water pump 7 operate. Compressor 2 supplies high-temperature, high-pressure gaseous refrigerant to condenser 3. Under the strong convection effect generated by the electric fan, the refrigerant dissipates heat and condenses, releasing a large amount of heat. Then, it flows through the expansion valve 5 of the chiller, where it is throttled and depressurized to become low-temperature, low-pressure liquid refrigerant. In condenser 3, it absorbs heat from the antifreeze and evaporates back into gaseous refrigerant, which is then drawn into compressor 2, completing the cooling cycle. Electric water pump 7 pumps low-temperature coolant from the water circulation system to the battery pack's water-cooled heat exchange plate, absorbing the heat generated during battery operation to achieve a cooling effect and prevent the battery from overheating.

[0042] In addition, this all-in-one battery thermal management system has one function with three modes: shutdown mode, self-circulation mode, and cooling mode.

[0043] The switching between the three modes of the generator set is controlled by the vehicle's BMS (Battery Management System). The following are the operating states of the main components in the three modes:

[0044] 1. Power off mode: The system is in standby mode;

[0045] 2. Cooling mode: Electric water pump 7 is turned on, electric fan is turned on, and compressor 2 is turned on. At this time, the system is running normally and cooling the battery pack.

[0046] 3. Self-circulation mode: Electric water pump 7 is on, electric fan is off, and compressor 2 is off. This mode is suitable for low ambient temperature or low power consumption.

[0047] Thus, the all-in-one battery thermal management system integrates the compressor 2, electric fan 4, and electric water pump 7 into one unit, reducing the number of electrical components; by using high-voltage electric fan 4 and electric water pump 7, the power supply line current is smaller, the power output is more stable, and the power loss is also smaller; the electric fan 4 and electric water pump 7 are moved out of the built-in drive board and become a pure motor structure, which has better high-temperature resistance; the cost of electric fan 4 and electric water pump 7 is reduced.

[0048] In addition to the above embodiments, this utility model also includes other implementation methods. All technical solutions formed by equivalent transformation or equivalent substitution should fall within the protection scope of the claims of this utility model.

Claims

1. A battery thermal management system of all-in-one drive, comprising a rack (1), characterized in that: The rack (1) is provided with an electrical system, a water circulation system and a refrigeration system; The refrigeration system comprises a compressor (2), a condenser (3), an electronic fan (4) and an expansion valve (5), the compressor (2), the condenser (3) and the expansion valve (5) are sequentially connected through a pipeline (6); The water circulation system comprises an electronic water pump (7) and an evaporator (8), the input port of the electronic water pump (7) is connected with a water inlet pipe (9), the output port of the evaporator (8) is connected with a water outlet pipe (10), and the output port of the electronic water pump (7) is connected with the input port of the evaporator (8) through a connecting pipe (11); The electrical system comprises a driver (12) and a controller (13), and the driver (12), the controller (13), the compressor (2), the electronic fan (4) and the electronic water pump (7) are electrically connected.

2. The battery thermal management system of claim 1, wherein: Temperature sensors are arranged on the water inlet pipe (9) and the water outlet pipe (10).

3. The battery thermal management system of claim 2, wherein: Pressure sensors are arranged on the water inlet pipe (9) and the water outlet pipe (10).

4. The battery thermal management system of claim 1, wherein: The evaporator (8) and the expansion valve (5) are integrated.

5. The battery thermal management system of claim 1, wherein: The electronic fan (4) is provided with a plurality of electronic fans.

6. The battery thermal management system of claim 5, wherein: The specific number of the electronic fan (4) is two.

7. The battery thermal management system of claim 1, wherein: The condenser (3) is a parallel flow condenser (3).

8. The battery thermal management system of claim 1, wherein: The expansion valve (5) is a balanced thermal expansion valve (5).

9. The battery thermal management system of claim 1, wherein: The flow rate of the electronic water pump (7) is greater than 6000 L / h.

10. The battery thermal management system of claim 1, wherein: The rack (1) is made of stainless steel.

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