Integrated battery thermal management system

Abstract

The invention discloses an integrated battery thermal management system which comprises a protection bin, the protection bin comprises a battery area and a temperature control area, a temperature adjusting plate is installed at the bottom of the battery area, a liquid circulation pipeline is arranged in the temperature adjusting plate, a battery bin is installed above the temperature adjusting plate, and a pressure release valve is arranged at the upper end of the battery bin. The side wall of the battery bin is provided with a temperature control assembly, an air supply tank and a cupping suppression tank, the air supply tank is communicated with the battery bin through a pipeline, an air supply valve is arranged at an air outlet of the air supply tank, an air pressure sensor is arranged in the battery bin, the cupping suppression tank is communicated with the battery bin through a pipeline, a circulating fan is arranged in the battery bin, and a plurality of self-control nozzles are arranged in the battery bin; and the self-control nozzle is communicated with the cupping suppression tank through a pipeline. The battery bin is filled with nitrogen by arranging the gas supplementing tank, the contact between the battery and oxygen is reduced, the possibility of fire outbreak is reduced, meanwhile, the fire suppression tank and the self-control nozzle are arranged, and when fire outbreak occurs during thermal runaway, the fire behavior is suppressed through the fire suppression tank.

Description

Technical Field

[0001] The present invention belongs to the technical field of battery thermal management and relates to an integrated battery thermal management system. Background Art

[0002] Lithium batteries are widely used in devices that require battery power supply due to their advantages such as high energy density and long lifespan. However, lithium batteries are relatively sensitive to temperature changes. Low temperatures can affect the capacity and efficiency of lithium batteries, while high temperatures may cause thermal runaway of the battery, and even pose dangerous situations such as fire.

[0003] In the patent document with the publication number CN221226363U, an integrated battery thermal management system and a battery system are disclosed. By setting up a heat exchange chamber and a flowing heat exchange system for the heat exchange liquid, thermal management of the battery is achieved. And by setting up an independent battery chamber, a sealed partition is formed with the heat exchange chamber, reducing the possibility of the heat exchange liquid entering the battery interior and causing battery short circuit. In this technical solution, although the battery can be effectively thermally managed, there is no effective suppression measure when the battery undergoes thermal runaway, and there is a great risk of thermal runaway during the use of the battery. Summary of the Invention

[0004] In view of the above problems, the present invention proposes an integrated battery thermal management system, which well solves the problems in the prior art.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] An integrated battery thermal management system, comprising:

[0007] A protective bin, the protective bin includes a battery area and a temperature control area;

[0008] A temperature regulating plate, the temperature regulating plate is installed at the bottom of the battery area, and a liquid circulation pipeline is arranged inside the temperature regulating plate;

[0009] A battery bin, the battery bin is installed above the temperature regulating plate, a plurality of heat dissipation fins are fixedly installed at the bottom of the battery bin, the battery is fixedly installed on the heat dissipation fins, and a pressure relief valve is arranged at the upper end of the battery bin;

[0010] A temperature control component, the temperature control component is fixedly installed on the side wall of the battery bin, and the water inlet and outlet pipelines of the temperature control component are connected to the temperature regulating plate;

[0011] A circulation fan, the circulation fan is installed inside the battery bin, and the air outlet of the circulation fan faces the heat dissipation fins;

[0012] Air supplement tank, the air supplement tank is fixedly installed on the side wall of the battery compartment, the air supplement tank is connected to the battery compartment through a pipeline, the inside of the air supplement tank is nitrogen, an air supplement valve is arranged at the exhaust port of the air supplement tank, and a pressure sensor is arranged in the battery compartment;

[0013] Fire suppression tank, the fire suppression tank is fixedly installed on the side wall of the battery compartment, and the fire suppression tank is connected to the battery compartment through a pipeline;

[0014] Self - controlled nozzle, a plurality of self - controlled nozzles are arranged in the battery compartment, and the self - controlled nozzles are connected to the fire suppression tank through pipelines.

[0015] Optionally, the self - controlled nozzle includes:

[0016] Connecting pipe, the first end of the connecting pipe is connected to the fire suppression tank;

[0017] Nozzle, the nozzle is fixedly installed at the second end of the connecting pipe;

[0018] Sealing plug, the sealing plug is installed on the nozzle;

[0019] Limit pin and limit ring, the limit pin is slidably installed on the sealing plug, the limit ring is fixedly installed on the side wall of the nozzle, after the sealing plug is installed, the limit pin is inserted into the limit ring, and at least three limit pins and limit rings are arranged in a circumferential array;

[0020] Plug - releasing spring, each limit pin is connected with a plug - releasing spring;

[0021] Thermal - sensitive tube, one end of the limit pin away from the limit ring abuts against the thermal - sensitive tube.

[0022] Optionally, a wedge - shaped block is arranged in the middle of the sealing plug, the end face of the limit pin is set as an inclined plane corresponding to and fitting the inclined plane of the wedge - shaped block, the sealing plug is coaxially and fixedly connected with a force - receiving disc, and the thermal - sensitive tube is installed between the force - receiving disc and the wedge - shaped block.

[0023] Optionally, a smoke - discharging port is arranged above the battery compartment, a smoke - discharging plate is installed at the smoke - discharging port, and the installation structure of the smoke - discharging plate in the battery compartment is the same as the installation structure of the sealing plug in the nozzle.

[0024] Optionally, the side wall of the battery compartment is made of a heat - insulating board.

[0025] Optionally, the temperature control component includes a heating component and a cooling component, and the liquid circulation pipeline in the temperature - regulating plate includes a heating pipeline connected to the heating component and a cooling pipeline connected to the cooling component.

[0026] Optionally, first control valves are installed at the liquid inlet ends of the heating pipeline and the cooling pipeline. The output end of the control valve is connected to a balance pipe, and a second control valve is installed on the balance pipe. The input end of the second control valve is communicated with the atmosphere, and the first control valve and the second control valve are connected in an interlocking circuit.

[0027] Optionally, the first control valves of the heating pipeline and the cooling pipeline are connected in an interlocking circuit.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. By providing an independent battery compartment, the contact between the battery and the liquid circulation pipeline is isolated, and the liquid circulation pipeline is arranged below the battery to reduce the possibility of the liquid contacting the battery. A circulation fan is arranged in the battery compartment to make the temperature of each part in the battery compartment uniform, which is convenient for rapid temperature adjustment. The battery compartment is filled with nitrogen through an air supplement tank to reduce the contact between the battery and oxygen and reduce the possibility of fire. At the same time, a fire suppression tank and an automatic control nozzle are provided. When a fire occurs during thermal runaway, the fire is suppressed by the fire suppression tank.

[0030] 2. By providing a thermal sensitive tube, when the battery undergoes thermal runaway and generates high temperature, the thermal sensitive tube bursts, causing the limit pin to lose support and disengaging from the limit ring under the action of the release spring. Furthermore, the sealing plug disengages under the pressure of the nozzle, causing the medium in the fire suppression tank to be ejected. By providing the thermal sensitive tube, the possibility of the automatic control nozzle not operating due to sensor failure is reduced, and the response of the automatic control nozzle is made more sensitive. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present invention;

[0032] Figure 2 is a schematic diagram of the structure of the temperature control plate part of an embodiment of the present invention;

[0033] Figure 3 is a schematic diagram of the structure of the automatic control nozzle of an embodiment of the present invention;

[0034] Figure 4 is a schematic diagram of the structure of the smoke discharge plate part of an embodiment of the present invention;

[0035] Figure 5 is a schematic diagram of the overall structure of another perspective of an embodiment of the present invention.

[0036] Reference numerals: 1, protective bin; 11, battery area; 12, temperature control area; 2, temperature control component; 23, heating element; 231, first control valve; 232, second control valve; 24, cooling element; 241, balance pipe; 21, temperature adjustment plate; 3, battery bin; 31, heat dissipation fins; 32, pressure relief valve; 33, smoke discharge plate; 4, circulation fan; 5, air supplement tank; 6, fire suppression tank; 7, automatic control nozzle; 71, connecting pipe; 72, nozzle; 73, sealing plug; 74, limit pin; 741, wedge block; 742, force receiving disc; 75, limit ring; 76, plug release spring; 77, thermal sensitive tube. Detailed implementation manners

[0037] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0038] Please refer to Figure 1 With Figure 2 , a disclosed integrated battery thermal management system according to an embodiment of the present invention includes a protective bin 1. The protective bin 1 includes a battery area 11 and a temperature control area 12. A temperature adjustment plate 21 is installed at the bottom of the battery area 11. A liquid circulation pipeline is provided inside the temperature adjustment plate 21. A battery bin 3 is installed above the temperature adjustment plate 21. A plurality of heat dissipation fins 31 are fixedly installed at the bottom of the battery bin 3. The battery is fixedly installed on the heat dissipation fins 31. A pressure relief valve 32 is provided at the upper end of the battery bin 3. A temperature control component 2, an air supplement tank 5 and a fire suppression tank 6 are installed on the side wall of the battery bin 3. The inlet and outlet water pipelines of the temperature control component 2 are connected to the temperature adjustment plate 21. The air supplement tank 5 is communicated with the battery bin 3 through a pipeline. Nitrogen is contained in the air supplement tank 5. An air supplement valve is provided at the exhaust port of the air supplement tank 5. A pressure sensor is provided inside the battery bin 3. The fire suppression tank 6 is communicated with the battery bin 3 through a pipeline. A circulation fan 4 is installed inside the battery bin 3. The air outlet of the circulation fan 4 faces the heat dissipation fins 31 directly. A plurality of automatic control nozzles 7 are arranged inside the battery bin 3. The automatic control nozzles 7 are communicated with the fire suppression tank 6 through pipelines.

[0039] Specifically, the battery is installed inside the battery bin 3. The temperature adjustment plate 21 is provided at the bottom of the battery bin 3. The temperature of the battery bin 3 is regulated by the temperature control component 2. A circulation fan 4 is installed inside the battery bin 3 to make the gas inside the battery bin 3 circulate. Nitrogen is provided inside the air supplement tank 5 communicated with the battery bin 3. The battery bin 3 is filled with nitrogen, and a fire suppression tank 6 is connected. The fire suppression tank 6 is provided with an automatic control nozzle 7.

[0040] In this way, by setting up an independent battery compartment 3, the contact between the battery and the liquid circulation pipeline is isolated, and the liquid circulation pipeline is arranged below the battery to reduce the possibility of liquid contacting the battery. A circulation fan 4 is set in the battery compartment 3 to make the temperature of each part in the battery compartment 3 uniform, which is convenient for rapid temperature adjustment. The battery compartment 3 is filled with nitrogen through the air supplement tank 5 to reduce the contact between the battery and oxygen and reduce the possibility of fire. At the same time, a fire suppression tank 6 and a self-control nozzle 7 are set. When a fire occurs during thermal runaway, the fire is suppressed by the fire suppression tank 6.

[0041] In some feasible ways, the protection compartment 1 is a rectangular compartment body, and at least one partition is arranged in the protection compartment 1 to divide the protection compartment 1 into a battery area 11 and a temperature control area 12. An independent battery compartment 3 can be set in the battery area 11. In this embodiment, the battery area 11 separated by the partition is the battery compartment 3. The side wall of the battery compartment 3 is set as a heat preservation board to facilitate maintaining and adjusting the temperature. A battery is arranged in the battery compartment 3, and heat dissipation fins 31 are arranged at the bottom of the battery compartment 3. A space is left at the bottom of the battery compartment 3 to cooperate with the circulation fan 4 to form an air flow circulation, improving the uniformity of temperature adjustment. A rectangular groove is arranged at the bottom of the protection compartment 1 for installing the temperature adjustment board 21. The temperature adjustment board 21 is installed in a fitting manner at the bottom of the battery compartment 3. A liquid circulation pipeline is arranged inside the temperature adjustment board 21, and the temperature control component 2 is connected to the liquid circulation pipeline.

[0042] In some feasible ways, the temperature control component 2 can adopt a battery temperature adjustment component in the prior art, including temperature sensors, a water tank, a heating device, a heat dissipation fan or an air conditioner, a circulation pump, and a control module installed on the battery and the liquid circulation pipeline.

[0043] In some feasible ways, both the air supplement tank 5 and the fire suppression tank 6 are pressure tanks. The air supplement tank 5 is filled with nitrogen, and the fire suppression tank 6 can be filled with perfluoroketone fire extinguishing agent. A pressure relief valve 32 is arranged on the battery compartment 3. When the temperature of the battery compartment 3 rises, the gas expands and is relieved through the pressure relief valve 32. An air supplement valve is arranged on the air supplement tank 5. When the temperature of the battery compartment 3 drops, the gas shrinks, and the air pressure sensor feeds back to control the opening of the air supplement valve, and the air supplement tank 5 supplements air to the battery compartment 3. When the temperature in the battery compartment 3 gets out of control, the self-control nozzle 7 opens, and the medium in the fire suppression tank 6 is sprayed out to cool down the temperature.

[0044] In some feasible ways, a plurality of temperature sensors, air pressure sensors, and open fire sensors are arranged in the battery compartment 3, and a control module based on a single chip microcomputer is arranged outside the protection compartment 1 to detect the sensor signals and control the opening of the air supplement valve and the self-control nozzle 7 through the sensor feedback signals. The self-control nozzle 7 can be selected as a nozzle controlled by an electric control valve.

[0045] As a specific implementation manner of an integrated battery thermal management system provided by the application, please refer to Figure 3, the self-controlled nozzle 7 includes a connecting pipe 71. The first end of the connecting pipe 71 is connected to the fire suppression tank 6, and the second end of the connecting pipe 71 is connected with a nozzle 72. A sealing plug 73 is installed in the nozzle 72, and a limiting ring 75 is installed outside the nozzle 72. A limiting pin 74 is slidably installed at a position corresponding to the limiting ring 75 on the sealing plug 73. After the sealing plug 73 is installed, the limiting pin 74 is inserted into the limiting ring 75. At least three limiting pins 74 and the limiting ring 75 are arranged in a circumferential array, and each limiting pin 74 is connected with a plug-releasing spring 76. One end of the limiting pin 74 away from the limiting ring 75 abuts against the thermal-sensitive tube 77.

[0046] Overall, by arranging the thermal-sensitive tube 77, when the battery has a thermal runaway and generates high temperature, the thermal-sensitive tube 77 bursts, causing the limiting pin 74 to lose support. Under the action of the plug-releasing spring 76, the limiting pin 74 disengages from the limiting ring 75, and then the sealing plug 73 disengages under the pressure of the nozzle 72, so that the medium in the fire suppression tank 6 is ejected. By arranging the thermal-sensitive tube 77, the possibility that the self-controlled nozzle 7 fails to act due to sensor failure is reduced, and the response of the self-controlled nozzle 7 becomes more sensitive.

[0047] Further, a wedge-shaped block 741 is arranged in the middle of the sealing plug 73. The end face of the limiting pin 74 is arranged as an inclined plane corresponding to and fitting the inclined plane of the wedge-shaped block 741. The sealing plug 73 is coaxially and fixedly connected with a force-receiving disc 742, and the thermal-sensitive tube 77 is installed between the force-receiving disc 742 and the wedge-shaped block 741.

[0048] It should be understood that by arranging the wedge-shaped block 741 and making the wedge-shaped block 741 contact the inclined plane of the limiting pin 74, the pressure exerted by the plug-releasing spring 76 on the thermal-sensitive tube 77 is reduced. Further, the possibility that the thermal-sensitive tube 77 bursts under the pressure of the plug-releasing spring 76 is reduced, and at the same time, the installation and replacement of the thermal-sensitive tube 77 are facilitated.

[0049] In some feasible ways, the sealing plug 73 is a block-shaped body adapted to the shape of the nozzle 72. A circular retaining ring is installed on the limiting pin 74, and the plug-releasing spring 76 is fixedly connected to the circular retaining ring. The other end of the plug-releasing spring 76 abuts against the limiting ring 75. One end of the limiting pin 74 close to the wedge-shaped block 741 is an inclined plane. The wedge-shaped block 741 is frustum-shaped, and the inclined plane of the wedge-shaped block 741 fits the inclined plane of the limiting pin 74. The force-receiving disc 742 is disc-shaped and coaxial with the wedge-shaped block 741. A plurality of connecting columns are arranged in a circumferential array at a position close to the outside of the force-receiving disc 742. The thermal-sensitive tube 77 is installed between the force-receiving disc 742 and the wedge-shaped block 741. The thermal-sensitive tube 77 is a common component of a fire sprinkler head, and a suitable model of the thermal-sensitive tube 77 is selected according to the required triggering temperature.

[0050] Further, please refer to Figure 4 , a smoke discharge port is arranged above the battery compartment 3, and a smoke discharge plate 33 is installed at the smoke discharge port. The installation structure of the smoke discharge plate 33 in the battery compartment 3 is the same as the installation structure of the sealing plug 73 in the nozzle 72.

[0051] It should be understood that by setting the smoke exhaust plate 33, when thermal runaway occurs, the battery will generate high temperature and gas, increasing the gas pressure in the battery compartment 3. By setting the smoke exhaust plate 33, the smoke exhaust plate 33 will open during thermal runaway to immediately release the high-pressure gas.

[0052] As another specific embodiment of the integrated battery thermal management system provided by the application, please refer to Figure 1 With Figure 5 , the temperature control component 2 includes a heating element 23 and a cooling element 24. The liquid circulation pipeline in the temperature adjustment plate 21 includes a heating pipeline connected to the heating element 23 and a cooling pipeline connected to the cooling element 24.

[0053] Combined with the specific usage scenario, the heating pipeline and the cooling pipeline are independently set, which is convenient for quickly switching the temperature adjustment state. When the temperature is adjusted too high or too low, the relative pipeline is immediately used for callback.

[0054] Furthermore, first control valves 231 are installed at the liquid inlet ends of the heating pipeline and the cooling pipeline. The output end of the first control valve 231 is connected to a balance pipe 241. A second control valve 232 is installed on the balance pipe 241. The input end of the second control valve 232 is communicated with the atmosphere. The first control valve 231 and the second control valve 232 are electrically interlocked.

[0055] It should be understood that by setting the first control valve 231, the second control valve 232 and the balance pipe 241, when the temperature is adjusted too high or too low, this part of the liquid is timely pumped back to the water tank through the liquid circulation pump, reducing the influence on the temperature callback of the other pipeline.

[0056] Further, the first control valves 231 of the heating pipeline and the cooling pipeline are electrically interlocked.

[0057] In some feasible ways, when pumping the liquid in the circulation pipeline back to the water tank, the first control valve 231 is closed and the second control valve 232 is opened to allow air to enter the circulation pipeline, facilitating the pumping out of the liquid. The first control valve 231 and the second control valve 232 are electrically interlocked, and the two first control valves 231 are electrically interlocked to prevent them from being opened or closed simultaneously. The interlock circuit is a common circuit and will not be elaborated here.

[0058] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. An integrated battery thermal management system, characterized in that, Comprising: A protective bin (1), the protective bin (1) including a battery area (11) and a temperature control area (12); A temperature regulating plate (21), the temperature regulating plate (21) being installed at the bottom of the battery area (11), and a liquid circulation pipeline being arranged inside the temperature regulating plate (21); A battery bin (3), the battery bin (3) being installed above the temperature regulating plate (21), a plurality of heat dissipation fins (31) being fixedly installed at the bottom of the battery bin (3), a battery being fixedly installed on the heat dissipation fins (31), and a pressure relief valve (32) being arranged at the upper end of the battery bin (3); A temperature control component (2), the temperature control component (2) being fixedly installed on the side wall of the battery bin (3), and the inlet and outlet water pipes of the temperature control component (2) being connected to the temperature regulating plate (21); A circulation fan (4), the circulation fan (4) being installed inside the battery bin (3), and the air outlet of the circulation fan (4) facing the heat dissipation fins (31); An air supplement tank (5), the air supplement tank (5) being fixedly installed on the side wall of the battery bin (3), the air supplement tank (5) being communicated with the battery bin (3) through a pipeline, nitrogen being inside the air supplement tank (5), an air supplement valve being arranged at the exhaust port of the air supplement tank (5), and a pressure sensor being arranged inside the battery bin (3); A fire suppression tank (6), the fire suppression tank (6) being fixedly installed on the side wall of the battery bin (3), and the fire suppression tank (6) being communicated with the battery bin (3) through a pipeline; Self - controlled nozzles (7), a plurality of self - controlled nozzles (7) being arranged inside the battery bin (3), and the self - controlled nozzles (7) being communicated with the fire suppression tank (6) through a pipeline.

2. The integrated battery thermal management system according to claim 1, characterized in that: The self - controlled nozzle (7) includes: A connecting pipe (71), the first end of the connecting pipe (71) being connected to the fire suppression tank (6); A nozzle (72), the nozzle (72) being fixedly installed at the second end of the connecting pipe (71); A sealing plug (73), the sealing plug (73) being installed on the nozzle (72); A limit pin (74) and a limit ring (75), the limit pin (74) being slidably installed on the sealing plug (73), the limit ring (75) being fixedly installed on the side wall of the nozzle (72), after the sealing plug (73) is installed, the limit pin (74) is inserted into the limit ring (75), and at least three limit pins (74) and limit rings (75) are arranged in a circumferential array; A plug - releasing spring (76), each limit pin (74) being connected with the plug - releasing spring (76); A thermal sensitive tube (77), one end of the limit pin (74) away from the limit ring (75) abutting against the thermal sensitive tube (77).

3. An integrated battery thermal management system according to claim 2, wherein: A wedge - shaped block (741) is arranged in the middle of the sealing plug (73), the end face of the limit pin (74) is set as an inclined plane corresponding to and fitting the inclined plane of the wedge - shaped block (741), the sealing plug (73) is coaxially and fixedly connected with a force - receiving disc (742), and the thermal sensitive tube (77) is installed between the force - receiving disc (742) and the wedge - shaped block (741).

4. An integrated battery thermal management system according to claim 3, characterized in that: A smoke exhaust port is provided above the battery compartment (3), and a smoke exhaust plate (33) is installed at the smoke exhaust port. The installation structure of the smoke exhaust plate (33) in the battery compartment (3) is the same as the installation structure of the sealing plug (73) in the nozzle (72).

5. An integrated battery thermal management system according to claim 1, characterized in that: The side wall of the battery compartment (3) is provided as a heat preservation plate.

6. An integrated battery thermal management system according to claim 1, characterized in that: The temperature control assembly (2) includes a heating element (23) and a cooling element (24). The liquid circulation pipeline in the temperature control plate (21) includes a heating pipeline connected to the heating element (23) and a cooling pipeline connected to the cooling element (24).

7. An integrated battery thermal management system according to claim 6, characterized in that: First control valves (231) are installed at the liquid inlet ends of the heating pipeline and the cooling pipeline. The output end of the control valve (231) is connected to a balance pipe (241). A second control valve (232) is installed on the balance pipe (241). The input end of the second control valve (232) is communicated with the atmosphere. The first control valve (231) and the second control valve (232) are electrically interlocked and connected.

8. An integrated battery thermal management system according to claim 7, characterized in that: The first control valves (231) of the heating pipeline and the cooling pipeline are electrically interlocked and connected.

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