Variable volume type automobile thermal management temperature control system

Abstract

The utility model belongs to the technical field of new energy automobiles, and particularly relates to a variable-volume automobile thermal management temperature control system. The temperature control system comprises a waste heat tank, the volume of the waste heat tank can be adjusted, the inlet end of the waste heat tank is connected with one end of a PTC thermistor, the outlet end of the waste heat tank is connected with the inlet end of a circulating pump, and the outlet end of the circulating pump is connected with the inlet end of a battery pack through a first electric three-way valve. An exhaust valve is arranged between the circulating pump and the first electric three-way valve; the other end of the PTC thermistor is connected with the outlet end of the battery pack through a second electric three-way valve, a flow meter is arranged between the PTC thermistor and the second electric three-way valve, a first temperature sensor is arranged between the flow meter and the PTC thermistor, and a second temperature sensor and an expansion meter are sequentially arranged between the PTC thermistor and the waste heat tank. According to the temperature control system, the waste heat of the motor can be well utilized, and the endurance of the new energy automobile is enhanced.

Description

Technical Field

[0001] This utility model belongs to the field of new energy vehicle technology, specifically relating to a variable volume automotive thermal management temperature control system. Background Technology

[0002] Generally, the operating temperature of the battery cells inside a battery pack is 15-35℃. In low-temperature environments, the battery pack needs to be heated separately using a PTC thermistor or other heating elements to keep the cells operating within a suitable temperature range. However, since heating consumes energy, this is the main reason why most electric vehicles experience reduced range in winter.

[0003] When new energy vehicle motors operate in winter, they generate heat due to internal friction, which is not effectively utilized. This temperature control system can effectively utilize the motor's waste heat. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a variable volumetric automotive thermal management temperature control system. This system utilizes the waste heat from the motor to heat the battery pack under low-temperature conditions by switching an electric three-way valve. It features a simple structure and convenient operation. Simulating low-temperature environments, the system allows the antifreeze inside the motor of a new energy vehicle to reach a certain temperature during operation, enabling the use of waste heat to heat the battery pack, thereby saving energy and enhancing the vehicle's range.

[0005] To achieve the above technical objectives, the technical solution adopted in this utility model embodiment is as follows:

[0006] A variable volume automotive thermal management temperature control system includes a waste heat tank with an adjustable volume. The inlet of the waste heat tank is connected to one end of a PTC thermistor, and the outlet of the waste heat tank is connected to the inlet of a circulation pump. The outlet of the circulation pump is connected to the inlet of a battery pack via a first electric three-way valve. An exhaust valve is provided between the circulation pump and the first electric three-way valve.

[0007] The other end of the PTC thermistor is connected to the outlet of the battery pack through a second electric three-way valve. A flow meter is installed between the PTC thermistor and the second electric three-way valve. A first temperature sensor is installed between the flow meter and the PTC thermistor. An expansion meter is installed between the PTC thermistor and the waste heat tank. A second temperature sensor is installed between the PTC thermistor and the expansion meter.

[0008] A third temperature sensor is provided between the inlet end of the battery pack and the first electric three-way valve, and a fourth temperature sensor is provided between the outlet end of the battery pack and the second electric three-way valve.

[0009] The connection or disconnection of the battery pack can be controlled by adjusting the first electric three-way valve and the second electric three-way valve.

[0010] Furthermore, the exhaust valve is located at the highest point of the pipeline and is used to discharge the gas generated by the expansion of the antifreeze in the car when the temperature control system heats up.

[0011] Furthermore, the PTC thermistor heats up to simulate the waste heat power of a new energy vehicle motor, and the flow meter reads the flow rate of the temperature control system in real time.

[0012] Furthermore, the expansion meter is used to replenish the temperature control system with liquid in real time. The expansion meter includes a liquid level sensor and a liquid level gauge. The liquid level sensor is used to read the liquid level of the expansion meter in real time.

[0013] Furthermore, the inlet and outlet of the waste heat tank are symmetrically arranged radially at the bottom of the waste heat tank, and a piston and piston rod assembly are provided at the top of the waste heat tank. The piston is sealed with a sealing ring, and the piston rod can move up and down. When the piston rod moves upward, the volume of the waste heat tank increases, and when the piston rod moves downward, the volume of the waste heat tank decreases.

[0014] Furthermore, the pressure of the waste heat tank is ≤3 bar, and the waste heat tank is used to simulate the liquid storage inside the electric vehicle motor.

[0015] The beneficial effects of the technical solution provided by this utility model embodiment are:

[0016] This invention utilizes the waste heat from the motor to heat the battery pack under low-temperature conditions by switching between a first electric three-way valve and a second electric three-way valve. When the circulation system heats up, the antifreeze expands and needs to be vented; the vent valve is installed at the highest point of the pipeline to facilitate the release of gas generated by the antifreeze expansion during the temperature control system's heating process. A flow meter reads the circulation system flow rate in real time. A PTC thermistor simulates the waste heat power of the electric motor in a new energy vehicle. A first and second temperature sensor read the temperatures before and after the PTC thermistor in real time. An expansion meter replenishes the circulation system in real time. A high-precision level sensor reads the level of the expansion meter in real time. The waste heat tank simulates the internal liquid storage of an electric vehicle motor, with an adjustable volume. The inlet and outlet of the waste heat tank are located at the bottom, and the piston is sealed with a sealing ring. The piston rod can be raised and lowered via an electric telescopic rod; raising the volume increases the waste heat tank volume, and lowering it decreases it. This temperature control system simulates low-temperature environmental conditions. When the antifreeze inside the electric motor of a new energy vehicle is running, it rises to a certain temperature, at which point the waste heat from the motor can be used to heat the battery pack, saving energy and enhancing the vehicle's range. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the variable volume automotive thermal management temperature control system in an embodiment of this utility model.

[0018] Figure 2 for Figure 1 A schematic diagram of the waste heat tank in a variable volume automotive thermal management temperature control system.

[0019] Figure 3 for Figure 2 Top view of the waste heat tank.

[0020] Figure 4 for Figure 2 Front view of the intermediate waste heat tank.

[0021] Figure 5 for Figure 4 AA view of the waste heat tank.

[0022] Explanation of reference numerals in the attached diagram: 1-Waste heat tank; 2-PTC thermistor; 3-Circulation pump; 4-First electric three-way valve; 5-Exhaust valve; 6-Second electric three-way valve; 7-Flow meter; 8-First temperature sensor; 9-Expansion meter; 10-Second temperature sensor; 11-Battery pack; 12-Third temperature sensor; 13-Fourth temperature sensor; 1a-Inlet; 1b-Outlet; 1c-Piston and piston rod assembly; 91-Level sensor; 92-Level gauge. Detailed Implementation

[0023] In the description of this utility model, it should be understood that the directional terms such as "inner" and "outer", "upper" and "lower", "left" and "right", "in" and "out" indicate the orientation or positional relationship, which are usually based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model.

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0025] Example 1

[0026] like Figure 1As shown, a variable volume automotive thermal management temperature control system includes a waste heat tank 1, the volume of which is adjustable. The inlet of the waste heat tank 1 is connected to one end of a PTC thermistor 2, and the outlet of the waste heat tank 1 is connected to the inlet of a circulation pump 3. The outlet of the circulation pump 3 is connected to the inlet of a battery pack 11 via a first electric three-way valve 4. An exhaust valve 5 is provided between the circulation pump 3 and the first electric three-way valve 4.

[0027] The other end of the PTC thermistor 2 is connected to the outlet end of the battery pack 11 through the second electric three-way valve 6. A flow meter 7 is installed between the PTC thermistor 2 and the second electric three-way valve 6. A first temperature sensor 8 is installed between the flow meter 7 and the PTC thermistor 2. An expansion meter 9 is installed between the PTC thermistor 2 and the waste heat tank 1. A second temperature sensor 10 is installed between the PTC thermistor 2 and the expansion meter 9.

[0028] A third temperature sensor 12 is provided between the inlet end of the battery pack 11 and the first electric three-way valve 4, and a fourth temperature sensor 13 is provided between the outlet end of the battery pack 11 and the second electric three-way valve 6.

[0029] By adjusting the first electric three-way valve 4 and the second electric three-way valve 6, the connection or disconnection of the battery pack 11 can be determined.

[0030] The exhaust valve 5 is located at the highest point of the pipeline and is used to release the gas generated by the expansion of the antifreeze in the car when the temperature control system heats up.

[0031] The PTC thermistor 2 simulates the waste heat power of a new energy vehicle motor, and the flow meter 7 reads the flow rate of the temperature control system in real time.

[0032] The expansion meter 9 is used to replenish the liquid in the temperature control system in real time. The expansion meter 9 includes a liquid level sensor 91 and a liquid level gauge 92. The liquid level sensor 91 is used to read the liquid level of the expansion meter 9 in real time.

[0033] like Figure 2-5 As shown, the inlet 1a and outlet 1b of the waste heat tank 1 are symmetrically arranged radially at the bottom of the waste heat tank 1. The top of the waste heat tank 1 is provided with a piston and piston rod assembly 1c. The piston is sealed with a sealing ring. The piston rod can move up and down. When the piston rod moves upward, the volume of the waste heat tank 1 increases. When the piston rod moves downward, the volume of the waste heat tank 1 decreases.

[0034] The pressure of waste heat tank 1 is ≤3 bar. Waste heat tank 1 is used to simulate the liquid storage inside an electric vehicle motor. The tank body thickness of waste heat tank 1 is 3 mm to ensure the sealing performance of the piston and piston rod assembly 1c. The piston is made of 304 stainless steel and has a thickness of 24 mm.

[0035] The method for temperature control using the above-mentioned variable volume automotive thermal management temperature control system includes the following steps:

[0036] Adjust the first electric three-way valve 4 and the second electric three-way valve 6 so that they are directly connected, and the battery pack 11 does not participate in the circulation. Start the circulation pump 3 and the PTC thermistor 2, and control the temperature between the PTC thermistor 2 and the expansion meter 9 to simulate the temperature inside the motor. Read the liquid level height H1 of the liquid level sensor 91, where H1 is in meters (m). At this time, the real-time volume V1 of the expansion meter 9 is V1 = A * H1 * 1000, in liters (L), where A is the bottom area of ​​the expansion meter 9, in meters (m²). 2 ;

[0037] The readings of the third temperature sensor 12 and the fourth temperature sensor 13 are monitored in real time. When the temperature between the inlet and outlet of the battery pack 11 (i.e. the working temperature of the battery pack 11) is lower than the normal working temperature, the first electric three-way valve 4 and the second electric three-way valve 6 are adjusted to heat the battery pack 11, simulating the residual heat of the motor in a low-temperature environment to raise the temperature of the battery pack 11. The circulation pump 3 replenishes the circulation pipeline with liquid through the expansion meter 9. After the circulation system is full of liquid, the liquid level height H2 of the liquid level sensor 91 is read. The unit of H2 is m. At this time, the real-time volume of the expansion meter 9 is V2 = A * H2 * 1000, the unit is L. At this time, the total liquid volume of the circulation system is V3 = V1 - V2.

[0038] The volume of the pipeline is calculated using the total length L' and inner diameter d of the pipeline. The liquid storage volume V4 = π * (d / 2)² * L' is then calculated. The internal volume of the waste heat tank 1 is V5 = V3 - V4, where the units of L' and d are both m.

[0039] Adjust the height H3 of the piston rod of waste heat tank 1 = V5 / B*1000, where B is the bottom area of ​​waste heat tank 1, in meters. 2 The unit of H3 is m, which is used to heat the battery pack by utilizing the waste heat of the motor, so that the battery pack cells can operate within a suitable temperature range.

[0040] Since adjusting the height of the piston rod is a conventional technique in this field, it will not be elaborated here. Whether it is manual or automatic adjustment, as long as the height of the piston rod can be accurately adjusted, it can be used in this temperature control system.

[0041] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A variable volume automotive thermal management temperature control system, characterized by, Including the waste heat tank (1), the volume of the waste heat tank (1) can be adjusted, one end of the waste heat tank (1) is connected with the inlet end of the PTC thermistor (2), the outlet end of the waste heat tank (1) is connected with the inlet end of the circulating pump (3), the outlet end of the circulating pump (3) is connected with the inlet end of the battery pack (11) through the first electric three-way valve (4), the exhaust valve (5) is arranged between the circulating pump (3) and the first electric three-way valve (4); The other end of the PTC thermistor (2) is connected with the outlet end of the battery pack (11) through the second electric three-way valve (6), the flow meter (7) is arranged between the PTC thermistor (2) and the second electric three-way valve (6), the first temperature sensor (8) is arranged between the flow meter (7) and the PTC thermistor (2), the expansion meter (9) is arranged between the PTC thermistor (2) and the waste heat tank (1), and the second temperature sensor (10) is arranged between the PTC thermistor (2) and the expansion meter (9).

2. The variable displacement automotive thermal management temperature control system of claim 1, wherein, The third temperature sensor (12) is arranged between the inlet end of the battery pack (11) and the first electric three-way valve (4), and the fourth temperature sensor (13) is arranged between the outlet end of the battery pack (11) and the second electric three-way valve (6). By adjusting the first electric three-way valve (4) and the second electric three-way valve (6), whether the battery pack (11) is connected or not can be realized.

3. The variable displacement automotive thermal management temperature control system of claim 1, wherein, The exhaust valve (5) is arranged at the highest point of the pipeline, and is used for exhausting the gas generated by the expansion of the automobile antifreeze when the temperature control system is heated.

4. The variable displacement automotive thermal management temperature control system of claim 1, wherein, The PTC thermistor (2) simulates the waste heat power of the new energy automobile motor, and the flow meter (7) reads the flow of the temperature control system in real time.

5. The variable displacement automotive thermal management temperature control system of claim 1, wherein, The expansion meter (9) is used for real-time liquid supplement of the temperature control system, and the expansion meter (9) includes a liquid level sensor (91) and a liquid level meter (92), and the liquid level sensor (91) is used for real-time reading of the liquid level of the expansion meter (9).

6. The variable displacement automotive thermal management temperature control system of claim 1, wherein, The inlet (1a) and the outlet (1b) of the waste heat tank (1) are symmetrically arranged on the bottom of the waste heat tank (1), the top of the waste heat tank (1) is provided with a piston and a piston rod assembly (1c), the piston is sealed by a sealing ring, the piston rod can move up and down, when the piston rod moves upward, the volume of the waste heat tank (1) becomes larger, and when the piston rod moves downward, the volume of the waste heat tank (1) becomes smaller.

7. The variable displacement automotive thermal management temperature control system of claim 1, wherein, The pressure of the waste heat tank (1) is less than or equal to 3bar, and the waste heat tank (1) is used for simulating the liquid storage in the electric automobile motor.

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