A new energy automobile battery heating device

Abstract

The utility model provides a new energy automobile battery heating device belongs to acoustic equipment technical field, it solved the low temperature weather to cause new energy automobile's endurance decline, start difficult etc.

Description

Technical Field

[0001] This utility model belongs to the field of battery heating technology, and specifically relates to a heating device for new energy vehicle batteries. Background Technology

[0002] New energy vehicles generally face a significant reduction in driving range in low-temperature environments. This problem is particularly pronounced in regions with extremely low winter temperatures, such as Northeast China, where extreme temperatures can drop below -20°C. Research indicates that the main mechanisms of performance degradation in lithium-ion batteries under low-temperature conditions include:

[0003] Increased electrolyte viscosity: Low temperature leads to reduced electrolyte fluidity, decreased lithium-ion migration rate, significantly increased battery internal resistance, and reduced usable capacity.

[0004] Reduced electrode activity: The lithium intercalation kinetics of the negative electrode material deteriorate, which easily leads to lithium metal precipitation, further exacerbating capacity loss and safety risks.

[0005] Low-temperature start-up performance deteriorates: the battery output power is limited, resulting in insufficient power supply to the drive motor when the vehicle is cold-started, leading to sluggish acceleration or even failure to start normally.

[0006] While existing thermal management technologies can alleviate the problem of low battery temperatures, they have the following limitations:

[0007] High energy consumption: PTC heating relies on the battery's own power, which exacerbates the reduction in battery life in winter;

[0008] Low efficiency: The heating efficiency of heat pump systems drops significantly in extremely low temperature environments;

[0009] Dependent on external power source: The preheating function requires charging station support, limiting its applicability. Utility Model Content

[0010] The purpose of this utility model is to address the aforementioned problems in the existing technology by providing a heating device for a new energy vehicle battery. This purpose can be achieved through the following technical solution: A heating device for a new energy vehicle battery includes an engine heat source acquisition device, a temperature control piping system, a battery housing heat exchange structure, and an ECU control unit. The engine heat source acquisition device is connected to the engine exhaust system. The temperature control piping system includes an insulated pipe and an electromagnetic regulating valve. The electromagnetic regulating valve is located at the connection between the insulated pipe and the engine heat source acquisition device. The battery housing heat exchange structure is located on the insulated pipe and in contact with the battery housing.

[0011] The working principle of this utility model is as follows: When the weather temperature is low, the hybrid vehicle first uses the engine to provide power and opens the electromagnetic regulating valve to its maximum. The heat from the engine is transferred to the battery box, and heat exchange occurs between the engine and the battery box through the battery box heat exchange device, causing the battery box temperature to rise. When the battery box temperature reaches a suitable temperature, the electromagnetic regulating valve closes or decreases, at which point the pure electric mode can be switched to ensure that the battery range is not severely reduced. Similarly, the range-extended vehicle can also generate electricity through the engine before starting, generating heat to provide to the battery box. The ECU control unit uses existing technology to control the opening and closing of the electromagnetic regulating valve according to the temperature of the battery box. The waste heat after heat exchange returns to the engine's exhaust system through a pipe.

[0012] The aforementioned new energy vehicle battery heating device also includes at least three temperature sensors.

[0013] In the aforementioned new energy vehicle battery heating device, a safety pressure relief valve is also installed in the temperature control pipeline system.

[0014] In the aforementioned new energy vehicle battery heating device, the heat-insulating pipe adopts a three-layer composite structure, with the inner layer being a stainless steel corrugated pipe, the middle layer being an aerogel insulation layer, and the outer layer being an aluminum alloy protective layer.

[0015] In the aforementioned new energy vehicle battery heating device, the battery box heat exchange structure includes a heat spreader and heat-conducting fins, with the heat-conducting fins disposed on the heat spreader and in contact with the battery box.

[0016] In the aforementioned new energy vehicle battery heating device, the heat spreader plate is provided with honeycomb channels.

[0017] In the aforementioned new energy vehicle battery heating device, the heat-insulating pipe is also provided with a flexible section.

[0018] Compared with the prior art, this invention has the advantage of being able to transfer the heat generated by the engine to the battery for heating. Attached Figure Description

[0019] Figure 1 is a structural schematic diagram of this utility model.

[0020] Figure 2 is a schematic diagram of the bottom structure of this utility model.

[0021] Figure 3 is a schematic diagram of the structure of the thermal insulation pipe of this utility model.

[0022] In the diagram, 1. Engine heat source acquisition device; 2. Temperature control piping system; 3. Battery box heat exchange structure; 5. Insulated pipe; 6. Electromagnetic regulating valve; 8. Safety pressure relief valve; 9. Stainless steel corrugated pipe; 10. Aerogel insulation layer; 11. Aluminum alloy protective layer; 12. Heat spreader; 13. Heat-conducting fins; 14. Elastic section. Detailed Implementation

[0023] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0024] As shown in Figures 1-3, this new energy vehicle battery heating device includes an engine heat source acquisition device 1, a temperature control piping system 2, a battery box heat exchange structure 3, and an ECU control unit. The engine heat source acquisition device 1 is connected to the engine exhaust system. The temperature control piping system 2 includes an insulated pipe 5 and an electromagnetic regulating valve 6. The electromagnetic regulating valve 6 is located at the connection between the insulated pipe 5 and the engine heat source acquisition device 1. The battery box heat exchange structure 3 is located on the insulated pipe 5 and is in contact with the battery box.

[0025] To elaborate further, it also includes at least three temperature sensors, which are placed in different locations to detect the temperature at different parts of the battery pack, in order to prevent the battery pack from overheating in certain areas.

[0026] To elaborate further, the temperature-controlled piping system 2 is also equipped with a safety pressure relief valve 8, which is used to ensure that the insulated piping 5 will not deform or explode due to excessive air pressure.

[0027] To elaborate further, the insulated pipe 5 adopts a three-layer composite structure, with the inner layer being a stainless steel corrugated pipe 9, the middle layer being an aerogel insulation layer 10, and the outer layer being an aluminum alloy protective layer 11.

[0028] To elaborate further, the battery housing heat exchange structure 3 includes a heat spreader 12 and heat-conducting fins 13. The heat-conducting fins 13 are disposed on the heat spreader 12 and in contact with the battery housing. This arrangement is used to ensure that the battery housing is heated evenly and to reduce temperature differences. At the same time, the heat-conducting fins 13 can also dissipate heat when the battery temperature is too high.

[0029] To elaborate further, the heat spreader 12 is provided with honeycomb channels, which is used to further enhance the effect of the heat spreader 12.

[0030] To elaborate further, the insulated pipe 5 is also equipped with an elastic section 14. An axial corrugated compensation joint is added in the middle section of the insulated pipe 5, using a high-temperature resistant silicone + stainless steel mesh composite structure to alleviate the stress on the pipe caused by engine vibration and thermal expansion and contraction, and reduce the risk of weld cracking.

[0031] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or substitute them using similar methods, without departing from the spirit of this invention or exceeding the scope defined by the appended claims. Although this document uses a large number of technical terms, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would contradict the spirit of this invention.

Claims

1. A new energy vehicle battery heating device, characterized in that, The device includes an engine heat source acquisition device (1), a temperature control piping system (2), a battery box heat exchange structure (3), and an ECU control unit. The engine heat source acquisition device (1) is connected to the engine exhaust system. The temperature control piping system (2) includes an insulated pipe (5) and an electromagnetic regulating valve (6). The electromagnetic regulating valve (6) is located at the connection between the insulated pipe (5) and the engine heat source acquisition device (1). The battery box heat exchange structure (3) is located on the insulated pipe (5) and is in contact with the battery box.

2. The new energy vehicle battery heating device according to claim 1, characterized in that, It also includes at least three temperature sensors.

3. The new energy vehicle battery heating device according to claim 1, characterized in that, The temperature control piping system (2) is also equipped with a safety pressure relief valve (8).

4. The new energy vehicle battery heating device according to claim 1, characterized in that, The insulated pipe (5) adopts a three-layer composite structure, with the inner layer being a stainless steel corrugated pipe (9), the middle layer being an aerogel insulation layer (10), and the outer layer being an aluminum alloy protective layer (11).

5. A new energy vehicle battery heating device according to claim 1, characterized in that, The battery box heat exchange structure (3) includes a heat spreader (12) and heat-conducting fins (13), the heat-conducting fins (13) being disposed on the heat spreader (12) and in contact with the battery box.

6. A new energy vehicle battery heating device according to claim 5, characterized in that, The temperature distribution plate (12) is provided with honeycomb channels.

7. The new energy vehicle battery heating device according to claim 1, wherein the heat-insulating pipe (5) is further provided with an elastic section (14).

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