A car battery thermal runaway early warning monitoring device

Abstract

The present invention relates to an automobile battery thermal runaway early warning monitoring device applied to the field of thermal monitoring. By setting a horizontal monitor and a vertical monitor, the horizontal monitor is used to monitor whether there is a temperature abnormality in each row of batteries, and the vertical monitor is used to monitor whether there is a temperature abnormality in each column of batteries. By cross-locating the rows and columns where the temperature abnormalities are located, the specific batteries with temperature abnormalities can be accurately identified, effectively eliminating the need to set temperature sensors on each battery cell, significantly reducing the number of sensors required for temperature monitoring and the complexity of wiring, and reducing system cost and maintenance difficulty. At the same time, the telescopic rod drives the push-pull plate to move up and down, and combines the temperature difference fluctuation to realize accurate monitoring and positioning of heat distribution at different positions of the battery, further improving the heat dissipation efficiency and thermal runaway positioning accuracy, and significantly improving the heat dissipation management efficiency and safety and reliability during the operation of the new energy vehicle power battery pack.

Description

Technical Field

[0001] The present invention relates to an early warning monitoring device, in particular to an automobile battery thermal runaway early warning monitoring device applied to the field of thermal monitoring. Background Art

[0002] With the popularization of new energy vehicles, power batteries tend to generate a lot of heat during use. If the heat is not dissipated in time or the local temperature rises abnormally, it may cause thermal runaway and bring safety hazards.

[0003] Chinese patent publication number CN117706404B discloses a battery health monitoring and early warning method and system. By collecting battery voltage, charge and discharge current, and battery temperature data, the system calculates the sampling point deviation value and the cumulative number of deviations for the day after each sampling, conducts risk warnings at each stage of battery monitoring, and takes corresponding protective measures.

[0004] When monitoring battery temperature, a temperature sensor is usually installed on each battery cell to detect local overheating locations. However, due to the large number of battery cells, installing temperature sensors one by one not only increases the structural complexity and wiring difficulty, but also significantly increases the cost. Therefore, it is necessary to design an automotive battery thermal runaway early warning monitoring device that can reduce the use of temperature sensors, simplify the structure, and achieve efficient heat dissipation and accurate monitoring and positioning to ensure the safe operation of new energy vehicles. Summary of the Invention

[0005] In order to solve the above problems, the present invention provides a car battery thermal runaway early warning monitoring device, comprising a shell, a heat dissipation monitoring early warning device and a plurality of rectangularly distributed batteries are installed inside the shell, the heat dissipation monitoring early warning device comprises a horizontal monitor and a vertical monitor, the horizontal monitor and the vertical monitor each comprise a plurality of liquid cooling tubes, each liquid cooling tube on the horizontal monitor corresponds to each row of batteries, each liquid cooling tube on the vertical monitor corresponds to each column of batteries, the liquid cooling tubes are attached to the batteries, the outer walls on both sides of the liquid cooling tubes are fixedly connected with an inlet thermostat and an outlet thermostat, and one side of the liquid cooling tube is fixed with a temperature controller. The ends are fixedly connected with heat exchange tubes, and each row of adjacent liquid cooling tubes and each column of adjacent liquid cooling tubes are connected through an intermediate tube. The two ends of the intermediate tube are fixedly connected with one end of the corresponding heat exchange tube and one end of the liquid cooling tube respectively. The horizontal monitor and the vertical monitor both include a plug flow pump and a circulating radiator. The two ends of the plug flow pump are respectively connected with the two liquid cooling tubes on the outside. The two ends of the circulating radiator are respectively fixedly connected with an extraction pipe and a blowing pipe. A reflux branch pipe is fixedly connected between the extraction pipe and the heat exchange tube, an inlet branch pipe is fixedly connected between the blowing pipe and the heat exchange tube, and a heat conducting plate is fixedly connected to the inside of the heat exchange tube.

[0006] As a further improvement of the present application, a plurality of sleeves are fixedly connected to the liquid cooling tube, the sleeves are sleeved on the outside of the battery and slidably connected thereto, an inner flow cavity is opened inside the sleeve, and the inner flow cavity is communicated with the liquid cooling tube.

[0007] As a further improvement of the present application, the sleeve on the horizontal monitor is located on the upper side of the sleeve on the vertical monitor, and the liquid cooling pipe and the plug flow pump are connected through a hose.

[0008] As a further improvement of the present application, the top end of the shell is fixedly connected to a telescopic rod, the output end of the telescopic rod is fixedly connected to a push-pull plate, the bottom end of the push-pull plate is fixedly connected to multiple connecting sleeves, the multiple connecting sleeves correspond one-to-one to the multiple batteries, and the connecting sleeves are fixedly connected to the sleeve.

[0009] As another improvement of the present application, one end of the return branch pipe is fixedly connected to a valve tube, the valve tube is located on the inner side of the suction tube, the inner wall of the valve tube is fixedly connected to a valve core and a support bar, and the middle part of the support bar is slidably connected to a movable rod.

[0010] As another improved supplement to the present application, one end of the temperature sensing tube is slidably connected to a driving rod, one end of the driving rod is fixedly connected to one end of the movable rod, the other end of the driving rod is fixedly connected to a piston, the piston and the inner wall of the temperature sensing tube are sealed and slidably connected, and the interior of the temperature sensing tube is filled with thermal expansion fluid.

[0011] As another improved supplement of the present application, a plurality of leakage holes are opened on the side wall of the external leakage sleeve, and an extension piece is fixedly connected to one end of the temperature sensing tube, and the two ends of the extension piece are respectively located on the inner side of the external leakage sleeve and the inner side of the temperature sensing tube.

[0012] In summary, the present invention provides an automotive battery thermal runaway early warning monitoring device, which sets a horizontal monitor and a vertical monitor. The horizontal monitor is used to monitor whether there is a temperature abnormality in each row of batteries, and the vertical monitor is used to monitor whether there is a temperature abnormality in each column of batteries. By cross-locating the rows and columns where the temperature abnormalities are located, the specific batteries with temperature abnormalities can be accurately identified, effectively eliminating the need to set a temperature sensor on each battery cell, significantly reducing the number of sensors required for temperature monitoring and the complexity of wiring, and reducing system costs and maintenance difficulties.

[0013] At the same time, the present invention forms a three-dimensional and efficient heat dissipation network through liquid cooling tubes, heat exchange tubes, plug flow pumps, circulating radiators and heat conducting plates, so that the heat conducting liquid can circulate efficiently in the liquid cooling tubes and the outside of the battery and absorb the heat generated by the battery in time. By monitoring the temperature difference between the inlet thermostat and the outlet thermostat, the temperature changes of the battery row can be accurately reflected, thereby improving the sensitivity of thermal runaway monitoring.

[0014] At the same time, the telescopic rod drives the push-pull plate to move up and down, driving the sleeve to move back and forth at different positions of the battery. Combined with the temperature difference fluctuations, it realizes accurate monitoring and positioning of the heat distribution at different positions of the battery, further improving the heat dissipation efficiency and thermal runaway positioning accuracy, and significantly improving the heat dissipation management efficiency and safety and reliability of the new energy vehicle power battery pack during operation.

[0015] By setting up devices such as valve tubes, the flow rate of heat-conducting liquid in the liquid cooling tube corresponding to the battery with abnormal temperature can be increased, and targeted heat dissipation can be carried out for the battery with abnormal temperature, thus avoiding thermal runaway of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is an overall top view of the first and second embodiments of the present application;

[0017] Figure 2 This is a top view of the lateral monitor in the first, second, and third embodiments of the present application;

[0018] Figure 3 It is a top cross-sectional view of the sleeve in the first, second and third embodiments of the present application;

[0019] Figure 4 The three-dimensional diagram of the sleeve in the first, second and third embodiments of the present application;

[0020] Figure 5 This is a front view of the telescopic rod in the second and third embodiments of the present application;

[0021] Figure 6 This is a front cross-sectional view of the sleeve in the second and third embodiments of the present application;

[0022] Figure 7 This is a top cross-sectional view of the valve tube in the third embodiment of the present application.

[0023] Description of the numbers in the figure:

[0024] 1. Battery; 2. Liquid cooling tube; 201. Inlet thermostat; 202. Outlet thermostat; 203. Heat exchange tube; 204. Intermediate tube; 205. Plug pump; 206. Circulating radiator; 207. Blowing tube; 208. Extraction tube; 209. Inlet branch pipe; 210. Return branch pipe; 211. Heat conducting plate; 3. Sleeve; 301. Inner flow cavity; 4. Telescopic rod; 401. Push-pull plate; 402. Connecting sleeve; 5. Valve tube; 501. Valve core; 502. Support bar; 503. Movable rod; 504. Valve plug; 505. Temperature sensing tube; 506. Drive rod; 507. Piston; 508. External leakage sleeve; 509. Leak hole; 510. Extension piece. DETAILED DESCRIPTION

[0025] Two implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0026] The first implementation method:

[0027] Figure 1-4 A thermal runaway early warning monitoring device for automotive batteries is shown, comprising a housing, wherein a heat dissipation monitoring early warning device and a plurality of rectangularly distributed batteries 1 are installed inside the housing, wherein the heat dissipation monitoring early warning device comprises a horizontal monitor and a vertical monitor, wherein both the horizontal monitor and the vertical monitor comprise a plurality of liquid cooling tubes 2, wherein each liquid cooling tube 2 on the horizontal monitor corresponds to each row of batteries 1, and each liquid cooling tube 2 on the vertical monitor corresponds to each column of batteries 1, and the liquid cooling tube 2 is attached to the battery 1, and the outer walls on both sides of the liquid cooling tube 2 are respectively fixedly connected to an inlet thermostat 201 and an outlet thermostat 202, and one end of the liquid cooling tube 2 is fixedly connected to a heat exchange tube 203, and each row of adjacent liquid cooling tubes 2 and each column of adjacent liquid cooling tubes 2 are connected to each other. The liquid cooling tubes 2 are connected through the intermediate tube 204, and the two ends of the intermediate tube 204 are fixedly connected to one end of the corresponding heat exchange tube 203 and one end of the liquid cooling tube 2. The horizontal monitor and the vertical monitor both include a plug flow pump 205 and a circulation radiator 206. The two ends of the plug flow pump 205 are respectively connected to the two liquid cooling tubes 2 on the outside, and the two ends of the circulation radiator 206 are respectively fixedly connected with an extraction pipe 208 and a blow pipe 207. A reflux branch pipe 210 is fixedly connected between the extraction pipe 208 and the heat exchange tube 203, and an inlet branch pipe 209 is fixedly connected between the blow pipe 207 and the heat exchange tube 203. A heat conducting plate 211 is fixedly connected to the inside of the heat exchange tube 203.

[0028] Through the above arrangement, the interior of the heat exchange tube 203 is filled with heat transfer liquid. When the plug flow pump 205 is started, the heat transfer liquid circulates between the multiple liquid cooling tubes 2, and the flow direction of the heat transfer liquid is from the inlet thermostat 201 to the outlet thermostat 202. When the heat transfer liquid flows inside the liquid cooling tube 2, it can absorb the heat generated by the battery 1, thereby cooling the battery 1. Therefore, the temperature of the heat transfer liquid at the inlet thermostat 201 is lower than the temperature of the heat transfer liquid at the outlet thermostat 202. By calculating the temperature difference between the inlet thermostat 201 and the outlet thermostat 202, it is possible to determine whether the battery 1 in the corresponding row and the battery 1 in the corresponding column have temperature abnormalities. By cross-locating the row and column where the temperature abnormality is located, the specific battery 1 with the temperature abnormality can be accurately identified.

[0029] When the circulation radiator 206 is started, the heat transfer liquid inside the heat exchange tube 203 is discharged from the return branch 210 into the interior of the circulation radiator 206 for cooling. The cooled heat transfer liquid enters the interior of the heat exchange tube 203 through the inlet branch 209. The heat transfer liquid in the liquid cooling tube 2 will also enter the interior of the heat exchange tube 203 during the circulation process. The heat transfer liquid entering the heat exchange tube 203 from the liquid cooling tube 2 can be cooled by the heat exchange of the heat conductive plate 211. The above setting can make the temperature of the heat transfer liquid at each inlet thermostat 201 tend to be consistent, preventing the abnormal temperature rise of a row of batteries 1 or a column of batteries 1 from affecting the heat dissipation of other batteries 1. The temperature of the heat transfer liquid entering each row of batteries 1 is the same, which is conducive to comparing the temperature values ​​of multiple outlet thermostats 202, and is more conducive to judging whether a row of batteries 1 has temperature abnormalities.

[0030] The second implementation method:

[0031] Figure 1-6 A car battery thermal runaway early warning monitoring device is shown. Different from the first embodiment, a plurality of sleeves 3 are fixedly connected to the liquid cooling tube 2, the sleeve 3 is sleeved on the outside of the battery 1 and slidably connected thereto, an inner flow cavity 301 is opened inside the sleeve 3, the inner flow cavity 301 is connected to the liquid cooling tube 2, the sleeve 3 on the horizontal monitor is located on the upper side of the sleeve 3 on the vertical monitor, the liquid cooling tube 2 is connected to the plug pump 205 through a hose, the top of the shell is fixedly connected to the telescopic rod 4, the output end of the telescopic rod 4 is fixedly connected to the push-pull plate 401, the bottom end of the push-pull plate 401 is fixedly connected to a plurality of connecting sleeves 402, the plurality of connecting sleeves 402 correspond one-to-one to the plurality of batteries 1, and the connecting sleeves 402 are fixedly connected to the sleeve 3.

[0032] Since the battery 1 is in an elongated shape, the heat generated at different positions of the battery 1 may be different. Through the above arrangement, the thermal fluid can flow through the sleeve 3. Since the sleeve 3 is entirely wrapped around the outside of the battery 1, the temperature of the battery 1 can be better transferred to the inside of the thermal fluid.

[0033] When monitoring the battery temperature, the telescopic rod 4 can be started to drive the push-pull plate 401 to move up and down reciprocatingly. When the push-pull plate 401 moves up and down, it can drive the sleeve 3 to move up and down along the battery 1. At this time, the sleeve 3 can move to different positions of the battery 1, and then absorb heat from different positions of the battery 1. When different positions of the battery 1 have different heat generation, and the sleeve 3 moves up and down reciprocatingly, the temperature difference between the inlet thermostat 201 and the outlet thermostat 202 is presented in a wave-like manner, and in conjunction with the position of the up and down movement of the sleeve 3, the specific position of the heating of the battery 1 can be determined. Through the above arrangement, the heating position of the battery 1 can be located more accurately.

[0034] Figure 2-7A vehicle battery thermal runaway early warning and monitoring device is shown. Different from the first embodiment, one end of the return branch pipe 210 is fixedly connected to the valve tube 5, the valve tube 5 is located on the inner side of the suction tube 208, the inner wall of the valve tube 5 is fixedly connected to the valve core 501 and the support bar 502, the middle part of the support bar 502 is slidably connected to the movable rod 503, one end of the movable rod 503 is fixedly connected to the valve plug 504 matching the valve core 501, and one end of the valve tube 5 is fixedly connected to the temperature sensing tube 505 through the external leakage sleeve 508.

[0035] One end of the temperature sensing tube 505 is slidably connected to a driving rod 506, one end of the driving rod 506 is fixedly connected to one end of the movable rod 503, the other end of the driving rod 506 is fixedly connected to a piston 507, the piston 507 is sealed and slidably connected to the inner wall of the temperature sensing tube 505, the interior of the temperature sensing tube 505 is filled with thermal expansion fluid, and a plurality of leakage holes 509 are provided on the side wall of the external leakage sleeve 508. One end of the temperature sensing tube 505 is fixedly connected to an extension piece 510, and the two ends of the extension piece 510 are respectively located on the inner side of the external leakage sleeve 508 and the inner side of the temperature sensing tube 505.

[0036] With the above arrangement, the thermal fluid entering the extraction tube 208 from the return branch 210 passes through the valve core 501 into the valve tube 5 and is then discharged outward through the vent hole 509. When the temperature of the thermal fluid is too high, the extension piece 510 transfers the temperature of the thermal fluid to the thermal expansion fluid. At this time, the thermal expansion fluid increases in volume due to the heat, pushing the piston 507 to the right. The rightward movement of the piston 507 drives the valve plug 504 to the right as well. At this time, the passage between the valve core 501 and the valve plug 504 gradually increases, increasing the flow rate of the thermal fluid, thereby improving the heat dissipation effect of the battery 1.

[0037] Through the above configuration, the heat transfer liquid flow rate of the liquid cooling tube 2 corresponding to the battery 1 with abnormal temperature can be increased, and the battery 1 with abnormal temperature can be specifically dissipated to avoid thermal runaway of the battery 1.

[0038] In view of current actual needs, the protection scope of the above-mentioned implementation mode adopted in this application is not limited to this. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the protection scope of the present invention.

Claims

1. A car battery thermal runaway early warning monitoring device, comprising a housing, wherein a heat dissipation monitoring early warning device and a plurality of rectangularly distributed batteries (1) are installed inside the housing, characterized in that: The heat dissipation monitoring and early warning device comprises a horizontal monitor and a vertical monitor, and the horizontal monitor and the vertical monitor both comprise a plurality of liquid cooling tubes (2), each liquid cooling tube (2) on the horizontal monitor corresponds to each row of batteries (1), and each liquid cooling tube (2) on the vertical monitor corresponds to each column of batteries (1), the liquid cooling tube (2) is attached to the battery (1), and the outer walls on both sides of the liquid cooling tube (2) are fixedly connected with an inlet temperature controller (201) and an outlet temperature controller (202), respectively, and one end of the liquid cooling tube (2) is fixedly connected with a heat exchange tube (203), and each row of adjacent liquid cooling tubes (2) and each column of adjacent liquid cooling tubes (2) are connected via an intermediate tube (204), and the intermediate tube (20 4) are fixedly connected to one end of the corresponding heat exchange tube (203) and one end of the liquid cooling tube (2), respectively. The horizontal monitor and the vertical monitor both include a plug flow pump (205) and a circulation radiator (206). The two ends of the plug flow pump (205) are respectively connected to the two liquid cooling tubes (2) on the outside. The two ends of the circulation radiator (206) are fixedly connected to an extraction pipe (208) and a blow pipe (207), respectively. A return branch pipe (210) is fixedly connected between the extraction pipe (208) and the heat exchange tube (203), an inlet branch pipe (209) is fixedly connected between the blow pipe (207) and the heat exchange tube (203), and a heat conducting plate (211) is fixedly connected inside the heat exchange tube (203).

2. The automotive battery thermal runaway early warning monitoring device according to claim 1, characterized in that: A plurality of sleeves (3) are fixedly connected to the liquid cooling tube (2); the sleeves (3) are sleeved on the outside of the battery (1) and slidably connected thereto; an inner flow cavity (301) is provided inside the sleeve (3); and the inner flow cavity (301) is communicated with the liquid cooling tube (2).

3. The automotive battery thermal runaway early warning monitoring device according to claim 2, characterized in that: The sleeve (3) on the horizontal monitor is located on the upper side of the sleeve (3) on the vertical monitor, and the liquid cooling pipe (2) is connected to the plug flow pump (205) via a hose.

4. The automotive battery thermal runaway early warning and monitoring device according to claim 3, characterized in that: The top end of the housing is fixedly connected to a telescopic rod (4), the output end of the telescopic rod (4) is fixedly connected to a push-pull plate (401), the bottom end of the push-pull plate (401) is fixedly connected to a plurality of connecting sleeves (402), the plurality of connecting sleeves (402) correspond one-to-one to a plurality of batteries (1), and the connecting sleeves (402) are fixedly connected to the sleeve (3).

5. The automotive battery thermal runaway early warning and monitoring device according to claim 1, characterized in that: One end of the return branch pipe (210) is fixedly connected to a valve pipe (5), the valve pipe (5) is located inside the suction pipe (208), the inner wall of the valve pipe (5) is fixedly connected to a valve core (501) and a support bar (502), and the middle part of the support bar (502) is slidably connected to a movable rod (503).

6. The automotive battery thermal runaway early warning and monitoring device according to claim 5, characterized in that: One end of the valve tube (5) is fixedly connected to a temperature sensing tube (505) via an external leakage sleeve (508), and one end of the temperature sensing tube (505) is slidably connected to a driving rod (506).

7. The automotive battery thermal runaway early warning and monitoring device according to claim 6, characterized in that: One end of the driving rod (506) is fixedly connected to one end of the movable rod (503), and the other end of the driving rod (506) is fixedly connected to a piston (507). The piston (507) is sealed and slidably connected to the inner wall of the temperature sensing tube (505), and the interior of the temperature sensing tube (505) is filled with thermal expansion fluid.

8. The automotive battery thermal runaway early warning and monitoring device according to claim 7, characterized in that: The side wall of the external leakage sleeve (508) is provided with a plurality of leakage holes (509), one end of the temperature sensing tube (505) is fixedly connected to an extension piece (510), and the two ends of the extension piece (510) are respectively located on the inner side of the external leakage sleeve (508) and the inner side of the temperature sensing tube (505).

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