Cooling and heating device of new energy automobile power battery test bench
By introducing injectors and metal heating films into the power battery test bench of new energy vehicles, the cooling heating speed and efficiency are improved, the problems of complex structure and high cost of existing devices are solved, and more efficient power battery simulation and Improved low-temperature performance.
Patent Information
- Application Number
- CN202420743079.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-11
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-04-11
AI Technical Summary
The cooling and heating devices of the existing new energy vehicle power battery test bench have complex structures, slow cooling and heating speed, large area and high cost of replacement of parts, making it difficult to effectively simulate the real situation during daily driving.
Add an induction device to the cooling and heating device of the power battery test bench of new energy vehicles, combined with a metal heating film, and a gas-liquid separator and evaporator are used for cooling and heating, and use low-speed and high-pressure fluid to release fluid kinetic energy, reduce energy loss, and improve energy loss. Refrigeration efficiency, and install wide-line metal films on both sides of the battery for heating.
It has achieved an improvement in cooling and heating speed, saving floor area and energy, reducing part replacement costs, and improving the low-temperature performance and charging and discharging capabilities of the power battery.
Smart Images
Figure CN222240368U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of new energy vehicle power batteries, and in particular to a cooling and heating device for a new energy vehicle power battery test bench. Background Art
[0002] In secondary and higher vocational colleges involving automobile-related majors, the demand for new energy vehicle power battery test benches is gradually increasing. In order to make the power battery better simulate the actual conditions of daily driving, the battery should be cooled and heated as needed. However, when designing the cooling and heating system for the battery, negative effects such as too large a production area and too high a cost for parts replacement will occur.
[0003] For example, the Chinese invention patent with the authorization announcement number CN 115663351 B discloses a new energy vehicle power battery cooling device, including an evaporation chamber for absorbing battery heat and evaporating the refrigerant, a condensation chamber for absorbing the heat of the refrigerant and condensing the refrigerant, and a liquid collecting tank for collecting liquid refrigerant. A first partition is provided between the evaporation chamber and the condensation chamber, and the first partition is provided with a plurality of air holes for the gaseous refrigerant to pass through; a second partition is provided between the condensation chamber and the liquid collecting tank, and a one-way valve for the liquid refrigerant to pass through is provided on the second partition; a third partition is provided between the liquid collecting tank and the evaporation chamber, and a control valve for the liquid refrigerant to pass through is provided on the third partition. The semi-immersed design is adopted, which has a good cooling effect and reduces the impact of liquid impact on the power battery and vehicle stability. However, the cooling device has a relatively complex structure, and the cooling and heating speeds are relatively slow.
[0004] Another example is the Chinese utility model patent with the authorization announcement number CN 220543484 U, which discloses a new energy vehicle power battery management training platform, including: a cabinet, an insulating table top is set on the cabinet; a display stand, the display stand includes a display board and a frame, and the frame is set on the insulating table top; a power battery module, the power battery module includes a module shell, a copper busbar and a battery pack shell, the module shell is provided with six battery compartments, the module shell is fixed on the insulating table top, the battery pack shell cooperates with the module shell, and the copper busbar is set between the six battery compartments; a battery management system, the battery management system is set on the insulating table top, and the battery management system cooperates with the power battery module. In this utility model, the entire high-voltage system of a pure electric vehicle is fully displayed on the platform, which improves the teaching efficiency of teachers and facilitates the actual operation of later students. However, the structure of the training platform is relatively complex, and the cost of replacing parts is high. Summary of the invention
[0005] The purpose of the utility model is to provide a cooling and heating device for a new energy vehicle power battery test bench. By adding an ejector, the cooling and heating speed of the entire device is faster, and it occupies a small area and saves energy.
[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0007] A cooling and heating device for a new energy vehicle power battery test bench, wherein a power battery is provided in the device, and the power battery is connected to a heating power supply; a gas-liquid separator and an evaporator for absorbing the heat of the battery and evaporating the refrigerant are connected to the power battery, and two interfaces are provided on the gas-liquid separator, one is connected to a liquid collector for collecting liquid refrigerant, and the other is connected to an ejector; the front end of the ejector is connected to the evaporator, and the rear end thereof is connected to a liquid reservoir. The addition of an ejector to the cooling and heating device of the utility model makes the cooling effect better, and saves floor space and energy. In the refrigeration system, the ejector utilizes the fluid kinetic energy released by the low-speed high-pressure fluid during the pressure reduction process, so that the throttling process is closer to an isentropic process rather than an isenthalpic process. At the same time, the addition of the ejector reduces the evaporation pressure of the evaporator, increases the inlet pressure of the compressor, and reduces the compression work, thereby effectively reducing the energy loss of the cycle and improving the refrigeration efficiency.
[0008] Preferably, metal heating films are provided on both sides of the power battery to increase the heating speed.
[0009] In any of the above schemes, it is preferred that the metal heating film is a wide-line metal film, which is a 1mm thick FR4 plate, and the plate is covered with a 1OZ thick copper film on both sides. One side of the copper film is a complete rectangular plane, and the other side is a copper film composed of a continuous copper wire with width. The power supply is introduced from both ends of the copper wire, and an insulating wear-resistant layer is covered on the surface of the copper film. Since the copper wire has resistance, the copper wire will heat up when the current passes through the copper wire. The heat generated can be evenly transferred to the battery through the copper film plane on the other side, thereby achieving the purpose of heating the battery. The wide-line metal film heating method can effectively improve the low-temperature performance of the power battery. After heating, the battery can discharge 50% of its capacity instead of being almost unable to discharge before heating.
[0010] Preferably, in any of the above solutions, a temperature sensor is connected to the front end of the power battery.
[0011] In any of the above schemes, preferably, the rear end of the liquid storage tank is connected to the condenser, the condenser is connected to the compressor, and the other end of the compressor is connected to the liquid collector.
[0012] The working process of the cooling and heating device of the new energy vehicle power battery test bench of the utility model is as follows: first, the entire device is installed and debugged. When the power battery needs to be heated, the heating power supply is turned on. When the current passes through the metal heating film, the metal heating film will generate heat, and the heat will be transferred to the power battery; when the power battery needs to be cooled, the heating power supply is disconnected, and the high-temperature and high-pressure refrigerant enters the ejector from the condenser through the liquid storage device. At this time, the pressure continues to increase and the speed increases. At the same time, the liquid in the gas-liquid separator is sucked into the ejector in the low-pressure area. After the fluid is mixed, it absorbs heat and evaporates after passing through the evaporator. After the cold air flows through the power battery to cool it, it enters the gas-liquid separator, where the liquid re-enters the ejector, and the gas passes through the liquid collector and returns to the compressor for compression and then enters the condenser. The cycle work is performed according to the above steps.
[0013] In summary, the cooling and heating device of the new energy vehicle power battery test bench of the utility model has the following advantages: an ejector is added between the evaporator and the condenser to achieve better cooling effect, save floor space and save energy; metal heating films are provided on both sides of the power battery to increase the heating speed.
[0014] Description of Figure Numbers
[0015] Power battery 1, metal heating film 2, temperature sensor 3, heating power supply 4, gas-liquid separator 5, liquid collector 6, compressor 7, condenser 8, liquid storage tank 9, ejector 10, evaporator 11. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a structural schematic diagram of a preferred embodiment of the cooling and heating device of the new energy vehicle power battery test bench according to the utility model. DETAILED DESCRIPTION
[0017] The following description is merely exemplary in nature and is not intended to limit the disclosure, application or use. The specific implementation of the cooling and heating device of the new energy vehicle power battery test bench of the utility model is further described below in conjunction with the drawings of the specification.
[0018] like Figure 1As shown, a schematic structural diagram of a preferred embodiment of the cooling and heating device of the power battery test bench of a new energy vehicle according to the utility model. The cooling and heating device of the power battery test bench of the new energy vehicle according to the utility model is provided with a power battery 1, and the power battery 1 is connected to a heating power supply 4; the power battery 1 is connected to a gas-liquid separator 5 and an evaporator 11 for absorbing the heat of the battery and evaporating the refrigerant at the same time, and the gas-liquid separator 5 is provided with two interfaces, one connected to a liquid collector 6 for collecting liquid refrigerant, and the other connected to an ejector 10; the front end of the ejector 10 is connected to the evaporator 11, and the rear end thereof is connected to the liquid storage tank 9. The addition of the ejector 10 in the cooling and heating device of the utility model makes the cooling effect better, saves floor space, and saves energy.
[0019] In this embodiment, metal heating films 2 are provided on both sides of the power battery 1 to increase the heating speed.
[0020] In this embodiment, the metal heating film 2 uses a wide-line metal film, which is a 1mm thick FR4 plate. The plate is covered with a 1OZ thick copper film on both sides. One side of the copper film is a complete rectangular plane, and the other side is a copper film composed of a continuous copper wire with width. The power supply is introduced from both ends of the copper wire, and an insulating wear-resistant layer is covered on the surface of the copper film. Since the copper wire has resistance, the copper wire will heat up when the current passes through the copper wire. The heat generated can be evenly transferred to the battery through the copper film plane on the other side, thereby achieving the purpose of heating the battery. The wide-line metal film heating method can effectively improve the low-temperature performance of the power battery. After heating, the battery can discharge 50% of its capacity from being almost unable to discharge before heating.
[0021] Through the low-temperature charge and discharge experiment of the battery, it can be known that at low temperatures, the charge and discharge performance of the battery is greatly reduced. In order to improve the low-temperature performance of the battery, a wide-line metal film is used to heat the battery, that is, a wide-line metal film is installed on the two sides with the largest area of the battery for heating. The heating device of this heating method has a simple structure and is easy to install. Since the power batteries are closely arranged together and the thickness of each wide-line metal film is only 1-2mm, the wide-line metal film can be directly sandwiched between two battery cells, which has little effect on the volume of the battery box. Therefore, this heating method is easy to install and use on current square power batteries.
[0022] In this embodiment, a temperature sensor 3 is connected to the front end of the power battery 1 .
[0023] In this embodiment, the rear end of the liquid storage tank 9 is connected to the condenser 8 , the condenser 8 is connected to the compressor 7 , and the other end of the compressor 7 is connected to the liquid collector 6 .
[0024] The working process of the cooling and heating device of the new energy vehicle power battery test bench of the utility model is as follows: first, the entire device is installed and debugged. When the power battery 1 needs to be heated, the heating power supply 4 is turned on. When the current passes through the metal heating film 2, the metal heating film 2 will generate heat, and the heat will be transferred to the power battery 1; when the power battery 1 needs to be cooled, the heating power supply 4 is disconnected, and the high-temperature and high-pressure refrigerant enters the ejector 10 from the condenser 8 through the liquid storage tank 9. At this time, the pressure continues to increase and the speed is accelerated. At the same time, the liquid in the gas-liquid separator 5 is sucked into the ejector 10 in the low-pressure area. After the fluid is mixed, it absorbs heat and evaporates after passing through the evaporator 11. After the cold air flows through the power battery 1 to cool it, it enters the gas-liquid separator 5, wherein the liquid re-enters the ejector 10, and the gas passes through the liquid collector 6 and returns to the compressor 7 for compression and then enters the condenser 8, and the cycle is performed according to the above steps.
[0025] It is not difficult for those skilled in the art to understand that the cooling and heating device of the new energy vehicle power battery test bench of the utility model includes any combination of the parts in this specification. Due to the limited space and to make the specification concise, these combinations are not introduced in detail one by one here, but after reading this specification, the scope of the utility model composed of any combination of the parts constituting this specification is self-evident.
Claims
1. A cooling and heating device for a new energy vehicle power battery test bench, wherein a power battery (1) is provided in the device, and the power battery (1) is connected to a heating power source (4); a gas-liquid separator (5) and an evaporator (11) for absorbing the heat of the battery and evaporating the refrigerant are connected to the power battery (1), characterized in that: The gas-liquid separator (5) is provided with two interfaces, one of which is connected to a liquid collector (6) for collecting liquid refrigerant, and the other is connected to an ejector (10); the front end of the ejector (10) is connected to the evaporator (11), and the rear end thereof is connected to the liquid storage tank (9).
2. The cooling and heating device of the new energy vehicle power battery test bench according to claim 1, characterized in that: Metal heating films (2) are provided on both sides of the power battery (1).
3. The cooling and heating device of the new energy vehicle power battery test bench according to claim 2, characterized in that: The metal heating film (2) is a wide-line metal film, which is a 1mm thick FR4 plate. Both sides of the plate are covered with a 1OZ thick copper film, one side of the copper film is a complete rectangular plane, and the other side is a copper film composed of a continuous copper line with a width.
4. The cooling and heating device of the new energy vehicle power battery test bench according to claim 1 or 2, characterized in that: The front end of the power battery (1) is connected to a temperature sensor (3).
5. The cooling and heating device of the new energy vehicle power battery test bench according to claim 1, characterized in that: The rear end of the liquid storage container (9) is connected to the condenser (8), the condenser (8) is connected to the compressor (7), and the other end of the compressor (7) is connected to the liquid collector (6).