Battery pack heat management integrated unit

Abstract

The utility model discloses a battery pack heat management integrated unit which comprises an installation frame, an installation box fixedly installed on the installation frame, a fuel oil liquid heater, a circulating water pump and a water filter fixedly installed in the installation box, an oil tank fixedly installed on the installation frame, and the fuel oil liquid heater is connected to the oil tank through a pipeline. A heat exchanger is fixedly installed on the side face of the battery pack, a water inlet and a water outlet of the heat exchanger are connected with the fuel liquid heater and the water filter respectively, an expansion water tank is arranged between the heat exchanger and the water filter, and the heat exchanger, the water filter and the expansion water tank are connected through a three-way pipe. Liquid heated by the fuel oil liquid heater circularly flows through the circulating water pump, and when the liquid passes through the heat exchanger, the liquid exchanges heat with the battery pack to heat the battery pack, so that the influence of low temperature on the use of the battery pack is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery thermal management, and relates to a battery pack thermal management integrated unit. Background Art

[0002] A battery pack is an energy supply component on an electric vehicle. However, the use of the battery is greatly affected by temperature. When the battery temperature is too high, the battery may be burned out. When the battery temperature is low, the charge and discharge efficiency and capacity of the battery will be affected. Especially in winter with low temperature, it increases the charging time of the electric vehicle and reduces the driving range of the vehicle.

[0003] At present, the battery part is mainly heated by a PTC heating module. However, the PTC heating module itself consumes a large amount of electricity. When the battery pack is large, the cost is high when the PTC heating module covers the surface of the battery pack. Content of the Utility Model

[0004] In view of the above problems, the utility model provides a battery pack thermal management integrated unit, which well solves the problems in the prior art.

[0005] In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

[0006] A battery pack thermal management integrated unit, comprising:

[0007] A mounting frame;

[0008] A mounting box, which is fixedly installed on the mounting frame;

[0009] A fuel tank, which is fixedly installed on the mounting frame;

[0010] A fuel liquid heater, which is installed in the mounting box and is connected to the fuel tank through a pipeline;

[0011] A circulating water pump, which is fixedly installed in the mounting box, and the water outlet of the circulating water pump is connected to the water inlet of the fuel liquid heater through a pipeline;

[0012] A water filter, which is fixedly installed in the mounting box, and the water outlet of the water filter is connected to the water inlet of the circulating water pump through a pipeline;

[0013] A heat exchanger, the water inlet of which is connected to the water outlet of the fuel liquid heater through a pipeline, and the heat exchanger is fixedly installed on the side of the battery pack;

[0014] An expansion tank, the expansion pipe of which is connected with a three-way pipe, and the other two ends of the three-way pipe are respectively communicated with the water outlet of the heat exchanger and the water inlet of the water filter through pipelines.

[0015] Optionally, it further includes a control module, which is electrically connected to a temperature sensor and a water level sensor. The temperature sensor is installed in the battery pack, and the water level sensor is installed in the expansion tank. The control module is electrically connected to the fuel liquid heater and the circulation water pump.

[0016] Optionally, the water filter includes a fine filter and a coarse filter. The coarse filter is connected to the expansion tank, and the fine filter is connected to the circulation water pump.

[0017] Optionally, the coarse filter includes a filter cylinder, in which a cylindrical filter screen is installed. The filter cylinder is threadedly connected with an upper cover, and the upper cover is provided with inlet and outlet ports. The outlet port is connected to the upper end of the cylindrical filter screen, and the inlet port is connected to a position outside the cylindrical filter screen inside the filter cylinder. A slag discharge pipe is fixedly connected below the filter cylinder, and the slag discharge pipe is provided with a manual valve.

[0018] Optionally, the control module includes a delay module, which is electrically connected to the circulation water pump and the fuel liquid heater. The control module controls the circulation water pump to close with a delay compared to the fuel liquid heater.

[0019] Optionally, solenoid valves are installed at both the outlet of the fuel liquid heater and the inlet of the water filter, and the solenoid valves are electrically connected to the control module.

[0020] Optionally, an internal circulation pipe is installed between the outlet of the fuel liquid heater and the inlet of the water filter, and a solenoid valve connected to the control module is installed on the internal circulation pipe.

[0021] Compared with the prior art, the utility model has the following beneficial effects:

[0022] 1. The liquid heated by the fuel liquid heater is circulated by the circulation water pump. When the liquid passes through the heat exchanger, heat exchange occurs with the battery pack to heat the battery pack, reducing the influence of low temperature on the use of the battery pack. By setting the fuel liquid heater to heat the liquid, the need for electricity is reduced.

[0023] 2. After the liquid is filtered by the water filter, some scale may be generated during the heating process and flow in the pipeline. The condensed scale usually has a relatively large particle size. By setting the fine filter and the coarse filter, the coarse filter intercepts the scale, reducing the filtration pressure of the fine filter part.

[0024] 3. By setting up a delay module, on the one hand, it is convenient to make full use of the heat of the liquid. On the other hand, after the fuel liquid heater is turned off, the liquid is no longer heated, and scale gradually stops precipitating. By running the circulating water pump for a period of time, the precipitated scale is circulated and filtered, reducing the possibility of scale and impurities depositing in the pipeline after the liquid cools down. Brief Description of the Drawings

[0025] Figure 1 is a schematic structural diagram of the mounting rack of the embodiment of the present utility model;

[0026] Figure 2 is a schematic structural diagram of the overall structure of the embodiment of the present utility model;

[0027] Figure 3 is a schematic structural diagram of the liquid flow direction of the embodiment of the present utility model;

[0028] Figure 4 is a schematic structural diagram of the coarse filter of the embodiment of the present utility model.

[0029] Reference Signs: 1, mounting rack;

[0030] 2, mounting box;

[0031] 31, fuel tank; 32, fuel liquid heater;

[0032] 4, circulating water pump;

[0033] 5, water filter; 51, fine filter; 52, coarse filter; 521, filter cylinder; 522, cylindrical filter screen; 523, slag discharge pipe;

[0034] 6, heat exchanger;

[0035] 7, expansion tank; 8, internal circulation pipe. Detailed Embodiment

[0036] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0037] Please refer to Figures 1-3 , a battery pack thermal management integrated unit disclosed in the embodiment of the present utility model, including a mounting rack 1. Please refer to Figure 1 , the mounting rack 1 is a metal rack formed by fixedly connecting angle irons or steel pipes, etc., and is fixedly installed at the use position through bolts. The mounting rack 1 is fixedly installed with a mounting box 2. Please refer to Figure 2, a fuel liquid heater 32, a circulating water pump 4, and a water filter 5 are fixedly installed in the installation box 2. A fuel tank 31 is fixedly installed on the installation frame 1. The fuel liquid heater 32 is connected to the fuel tank 31 through a pipeline. The water outlet of the circulating water pump 4 is connected to the water inlet of the fuel liquid heater 32 through a pipeline. The water outlet of the water filter 5 is connected to the water inlet of the circulating water pump 4 through a pipeline. Please refer to Figure 3 , a heat exchanger 6 is fixedly installed on the side of the battery pack. The water inlet of the heat exchanger 6 is connected to the water outlet of the fuel liquid heater 32 through a pipeline. The water outlet of the heat exchanger 6 and the water inlet of the water filter 5 are connected to the same tee pipe. The other end of the tee pipe is connected to an expansion tank 7. The tee pipe is connected to the expansion pipe of the expansion tank 7.

[0038] Specifically, when the battery pack is in a low-temperature environment, the charge and discharge efficiency and capacity of the battery will be affected by temperature. A heat exchanger 6 is fixedly installed on the side of the battery pack. The heat exchanger 6 generates heat exchange with the battery pack through contact. The heat exchanger 6 is sequentially connected with a fuel liquid heater 32, a circulating water pump 4, a water filter 5, and an expansion tank 7 through pipelines. The fuel liquid heater 32 heats the liquid in the pipeline. The circulating water pump 4 makes the liquid in the pipeline circulate.

[0039] In this way, the liquid heated by the fuel liquid heater 32 circulates through the circulating water pump 4. When the liquid passes through the heat exchanger 6, it generates heat exchange with the battery pack to heat the battery pack and reduce the impact of low temperature on the use of the battery pack. By setting the fuel liquid heater 32 to heat the liquid, the need for electricity is reduced.

[0040] In some feasible ways, the installation frame 1 is in the shape of a rectangular frame, and the installation box 2 is in the shape of a rectangular box. The fuel liquid heater 32, the circulating water pump 4, and the water filter 5 are fixedly installed in the installation box 2 through bolts. The fuel tank 31 is bolted to the installation frame 1. The fuel liquid heater 32 heats the liquid by supplying fuel from the fuel tank 31. The heat exchanger 6 can be selected as a heat conduction pipeline arranged in a serpentine shape on the side of the battery pack to transfer heat to the battery pack. The expansion tank 7 can be set separately or connected to the original expansion tank of the vehicle. The expansion tank 7 is used to make up water for the liquid circulation pipeline and balance the pressure generated by the expansion of the liquid during heating.

[0041] Integrating the fuel liquid heater 32, the circulating water pump 4, and the water filter 5 into the installation box 2 is convenient for protecting each part. The circulating water flow first passes through the water filter 5, then through the circulating water pump 4 and into the fuel liquid heater 32, and is heated after filtering the water, reducing the generation of water scale in the water during heating.

[0042] As a specific implementation of a battery pack thermal management integrated unit provided by the application, it further includes a control module. The control module is electrically connected to a temperature sensor and a water level sensor. The temperature sensor is installed on the battery pack, and the water level sensor is installed on the expansion tank 7. The control module is electrically connected to the fuel liquid heater 32 and the circulation pump 4.

[0043] Overall, the performance of the battery will be affected in both low-temperature and high-temperature environments. By setting the temperature sensor, when the heating temperature reaches the appropriate range, the control module pauses the operation of the fuel liquid heater 32 and the circulation pump 4 through the feedback signal of the temperature sensor. By setting the water level sensor, it is convenient to supplement the liquid lost in the expansion tank 7. By setting the temperature sensor, the water level sensor and the control module, the automation degree of the equipment is improved.

[0044] In some feasible ways, the control module can be selected as a single-chip microcomputer module.

[0045] Further, please refer to Figure 2 , the water filter 5 includes a fine filter 51 and a coarse filter 52. The coarse filter 52 is connected to the expansion tank 7, and the fine filter 51 is connected to the circulation pump 4.

[0046] It should be understood that after the water filter 5 filters the liquid, some scale may be generated during the heating process and flow in the pipeline. The condensed scale usually has a larger particle size. By setting the fine filter 51 and the coarse filter 52, the coarse filter 52 intercepts the scale and reduces the filtration pressure of the fine filter 51 part.

[0047] Further, please refer to Figure 4 , the coarse filter 52 includes a filter cylinder 521. A cylindrical filter screen 522 is installed in the filter cylinder 521. The filter cylinder 521 is threadedly connected to an upper cover. The upper cover is provided with an inlet and an outlet. The outlet is connected to the upper end of the cylindrical filter screen 522, and the inlet is connected to a position outside the cylindrical filter screen 522 in the filter cylinder 521. A slag discharge pipe 523 is fixedly connected below the filter cylinder 521, and a manual valve is provided on the slag discharge pipe 523.

[0048] It should be understood that by setting the cylindrical filter screen 522, the liquid entering the filter cylinder 521 is discharged after passing through the cylindrical filter screen 522, and the scale is intercepted by the cylindrical filter screen 522 in the filter cylinder 521. After use, the scale is discharged through the slag discharge pipe 523.

[0049] In some feasible ways, the fine filter 51 can be selected as a common water filtration device to filter water before heating. The filter cylinder 521 is cylindrical. Two mounting holes are provided at the top of the upper cover as the inlet and outlet ports. A threaded ring is provided below the outlet port and is threadedly connected to the cylindrical filter screen 522. The lower end of the cylindrical filter screen 522 is a closed end. The side of the cylindrical filter screen 522 is a filter screen set according to the scale particle size. The slag discharge pipe 523 penetrates through the bottom of the filter cylinder 521 to discharge scale.

[0050] Furthermore, the control module includes a delay module. The delay module is electrically connected to the circulation pump 4 and the fuel liquid heater 32. The control module controls the circulation pump 4 to close with a delay compared to the fuel liquid heater 32.

[0051] Combined with the specific usage scenario, during the process of water flow circulation heating, scale or other impurities will be generated. Part of the scale and impurities flow continuously with the circulating water flow. However, when the water flow circulation stops, the scale and impurities may deposit at a certain position. By setting the delay module, after the fuel liquid heater 32 is turned off, the circulation pump 4 still operates for a period of time. On the one hand, it is convenient for the full utilization of the liquid heat. On the other hand, after the fuel liquid heater 32 is turned off, the liquid is no longer heated, and the scale gradually stops precipitating. By operating the circulation pump 4 for a period of time, the precipitated scale is circulated and filtered, reducing the possibility of scale and impurities depositing in the pipeline after the liquid cools down.

[0052] Furthermore, solenoid valves are installed at both the outlet of the fuel liquid heater 32 and the inlet of the water filter 5. The solenoid valves are electrically connected to the control module.

[0053] It should be understood that by setting the solenoid valves, it is convenient to seal the liquid flow and facilitate the maintenance of the equipment in the installation box 2.

[0054] Furthermore, please refer to Figure 2 , an internal circulation pipe 8 is installed between the outlet of the fuel liquid heater 32 and the inlet of the water filter 5. A solenoid valve connected to the control module is installed on the internal circulation pipe 8.

[0055] It should be understood that by setting the internal circulation pipe 8, when the heat of the battery pack reaches the requirement, by controlling the solenoid valves of the outlet of the fuel liquid heater 32, the water filter 5, and the internal circulation pipe 8, the solenoid valves of the outlet of the fuel liquid heater 32 and the water filter 5 are closed, and the solenoid valve of the internal circulation pipe 8 is opened. Thus, the liquid only circulates in the installation box 2. The liquid in the heat exchanger 6 gradually cools down. However, when it cools to a certain temperature, the circulation is restarted, and the liquid in the heat exchanger 6 is heated, facilitating the adjustment of the temperature of the battery pack within a suitable range without shutting down the fuel liquid heater 32.

[0056] Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A battery pack thermal management integrated unit, characterized in that: include: Mounting frame; An installation box, the installation box is fixedly installed on the installation frame; An oil tank, the oil tank being fixedly mounted on the mounting frame; A fuel liquid heater, the fuel liquid heater is installed in the installation box, and the fuel liquid heater is connected to the fuel tank through a pipeline; A circulating water pump, wherein the circulating water pump is fixedly installed in the installation box, and a water outlet of the circulating water pump is connected to a water inlet of the fuel liquid heater through a pipeline; A water filter, wherein the filter is fixedly installed in the installation box, and a water outlet of the water filter is connected to a water inlet of the circulating water pump through a pipeline; A heat exchanger, wherein a water inlet of the heat exchanger is connected to a water outlet of the fuel liquid heater through a pipeline, and the heat exchanger is fixedly mounted on a side of the battery pack; An expansion water tank, wherein the expansion pipe of the expansion water tank is connected to a tee pipe, and the other two ends of the tee pipe are connected to the water outlet of the heat exchanger and the water inlet of the water filter through pipelines.

2. A battery pack thermal management integrated unit according to claim 1, characterized in that: It also includes a control module, which is electrically connected to a temperature sensor and a water level sensor. The temperature sensor is installed on the battery pack, the water level sensor is installed on the expansion water tank, and the control module is electrically connected to the fuel liquid heater and the circulating water pump.

3. A battery pack thermal management integrated unit according to claim 2, characterized in that: The water filter comprises a fine filter and a coarse filter, the coarse filter is connected to the expansion water tank, and the fine filter is connected to the circulating water pump.

4. A battery pack thermal management integrated unit according to claim 3, characterized in that: The coarse filter includes a filter cartridge, a cylindrical filter screen is installed in the filter cartridge, an upper cover is threadedly connected to the filter cartridge, the upper cover is provided with a water inlet and an outlet, the water outlet is connected to the upper end of the cylindrical filter screen, the water inlet is connected to a position in the filter cartridge located outside the cylindrical filter screen, a slag discharge pipe is fixedly connected to the bottom of the filter cartridge, and the slag discharge pipe is provided with a manual valve.

5. A battery pack thermal management integrated unit according to any one of claims 2 to 4, characterized in that: The control module includes a delay module, and the delay module is electrically connected to the circulating water pump and the fuel liquid heater. The control module controls the circulating water pump to be closed with a delayed shutdown compared to the fuel liquid heater.

6. A battery pack thermal management integrated unit according to claim 5, characterized in that: The water outlet of the fuel liquid heater and the water inlet of the water filter are both equipped with solenoid valves, and the solenoid valves are electrically connected to the control module.

7. A battery pack thermal management integrated unit according to claim 6, characterized in that: An inner circulation pipe is installed between the water outlet of the fuel liquid heater and the water inlet of the water filter, and a solenoid valve connected to the control module is installed on the inner circulation pipe.

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