Thermal runaway early warning device for battery management

Abstract

The utility model relates to the technical field of battery protection, and discloses a thermal runaway early warning device for battery management, which comprises a battery protection box and a battery arranged in the battery protection box, when the heat generated in the battery use process is too high, the heat is conducted into a cavity through a shell, and the battery is prevented from being damaged. At the moment, inert gas in the cavity is heated to expand, the piston sliding block slides upwards along the inner wall of the cavity under the pushing of the inert gas, the piston sliding block drives the first connecting rod and the second connecting rod at the upper end to move upwards, and the second connecting rod drives the movable contact to be away from the electrode point in the moving process so that power failure can be automatically completed. And when the temperature of the battery is abnormal, the inert gas shrinks, the movable contact is pulled again to be in contact with the electrode point under the action of the spring, the power supply is switched on again, the device can automatically switch off the power utilization circuit when the temperature of the battery is abnormal, so that the battery stops working, and the circuit can be automatically switched on again when the temperature is reduced to normal temperature.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery protection technical field, concretely is a battery management uses thermal runaway early warning device. BACKGROUND

[0002] Battery thermal runaway refers to the situation where a battery generates excessive heat during use or charging and cannot dissipate heat effectively, leading to rapid temperature rise. This situation can cause serious safety problems, including fire, explosion and environmental pollution.

[0003] The new energy automobile battery thermal runaway early warning device of the patent number CN218414738U includes a battery protection box main body and a battery main body, the inside lower wall of the battery protection box main body is provided with a mounting frame, and the inside lower wall of the battery protection box main body is provided with a temperature monitor one, the battery main body is arranged on the upper end of the mounting frame, and the right end of the battery main body is provided with a top sheet, the right end of the top sheet is provided with a pressure sensor, and the upper wall of the battery protection box main body is provided with a mounting plate. The new energy automobile battery thermal runaway early warning device is convenient for early warning of the thermal runaway of the new energy automobile battery during use, is conducive to timely control of the thermal runaway battery, avoids danger caused by excessive thermal runaway, is conducive to protecting the stability and safety of the battery in the new energy automobile, reduces the probability of battery damage and deformation, is conducive to protecting the safety of the equipment during use, and reduces the harm caused by accidents.

[0004] The above-mentioned patent is conducive to protecting the stability and safety of the battery and reducing the probability of battery damage and deformation, but when the battery working temperature is abnormal, only early warning cannot make the battery stop working immediately, and the battery may still malfunction or even self-ignite when no one is using, so the safety performance still has certain defects.

[0005] Therefore, we propose a battery management thermal runaway early warning device to solve the above-mentioned problems. SUMMARY

[0006] The utility model aims at providing a battery management thermal runaway early warning device to solve the problem that when the battery working temperature is abnormal, only early warning cannot make the battery stop working immediately, and the battery may still malfunction or even self-ignite when no one is using, so the safety performance still has certain defects.

[0007] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a thermal runaway warning device for battery management, comprising a battery protection box and a battery installed inside the battery protection box, a protective cover movably installed on the upper end of the battery protection box, overheating protection devices are installed on both sides of the interior of the battery protection box, the overheating protection device comprises a shell fixedly installed on both sides of the interior of the battery protection box, a chamber is opened inside the shell, a piston slider is slidably connected to the interior of the chamber, the chamber at the lower end of the piston slider is filled with an inert gas that is easy to expand when heated, a spring is fixedly installed between the lower end of the piston slider and the inner wall of the chamber, a connecting rod 1 is fixedly installed on the upper end of the piston slider, a connecting rod 2 is fixedly installed on the side wall of the connecting rod 1, a moving contact is fixedly installed on one end of the connecting rod 2, electrode points are fixedly installed on both sides of the upper end of the battery, and the electrode points are slidably connected to the moving contact.

[0008] Preferably, a thread groove is provided at the upper end of each movable contact, and a useful electrical circuit is threadedly connected to the thread groove.

[0009] Preferably, a metal plate is fixedly mounted on the side wall of the moving contact, magnets are fixedly mounted on both sides of the upper end of the battery, the magnets are arranged on the sides of the electrode point, and there is mutual attraction between the metal plate and the magnets.

[0010] Preferably, connecting blocks are fixedly mounted on both sides of the upper end of the battery, touch alarm devices are fixedly mounted on the inner walls of the lower ends of the connecting blocks, and the metal plate is movably connected to the lower ends of the touch alarm devices.

[0011] Preferably, a fixing plate is fixedly mounted on the side wall of the connecting rod 1, a movable filter is fixedly mounted on the lower end of the fixing plate, and a plurality of filter holes 1 are equidistantly provided on the movable filter.

[0012] Preferably, a plurality of filter holes 2 are equidistantly provided on both side walls of the battery protection box, the number, size and spacing of the plurality of filter holes 1 and the plurality of filter holes 2 are the same, and the two are staggered.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. When the heat generated during the use of the battery is too high, the heat is conducted into the chamber through the shell. At this time, the inert gas in the chamber expands due to the heat. Under the push of the inert gas, the piston slider slides upward along the inner wall of the chamber, and the piston slider drives the upper connecting rod 1 and connecting rod 2 to move upward. During the movement, the connecting rod 2 drives the moving contact away from the electrode point to automatically complete the power off. When the temperature drops to normal, the inert gas contracts. Under the action of the spring, the moving contact is pulled again to contact the electrode point, and the power is connected again. When the battery temperature is abnormal, the device can automatically disconnect the power line, causing the battery to stop working. When the temperature drops to normal, the line can be automatically connected again.

[0015] 2. With the cooperation between the magnet, connecting block, metal plate, threaded groove, fixed plate, filter hole 1 and movable filter, the movable filter will be displaced when the piston slider moves and the power is cut off, so that the area of ​​the air vent formed between filter hole 1 and filter hole 2 on the side becomes larger, thereby accelerating the heat dissipation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the overall cross-sectional three-dimensional structure of the utility model;

[0018] Figure 3 This is a schematic diagram of the cross-sectional three-dimensional structure of the overheat protection device of the present utility model;

[0019] Figure 4 For the utility model Figure 3 A in the middle is an enlarged schematic diagram of the three-dimensional structure.

[0020] In the figure: 1. Battery protection box; 11. Filter hole 2; 2. Protective cover; 3. Battery; 31. Electrode point; 32. Magnet; 33. Connecting block; 34. Touch alarm device; 4. Overheat protection device; 41. Shell; 42. Chamber; 43. Piston slider; 44. Spring; 45. Connecting rod 1; 46. Connecting rod 2; 47. Moving contact; 48. Metal plate; 49. Threaded groove; 5. Fixed plate; 51. Filter hole 1; 52. Movable filter. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] Example 1: Please refer to Figure 1 - Figure 3 , a thermal runaway warning device for battery management, comprising a battery protection box 1 and a battery 3 installed inside the battery protection box 1, a protective cover 2 movably installed on the upper end of the battery protection box 1, overheating protection devices 4 are installed on both sides of the interior of the battery protection box 1, the overheating protection device 4 comprises a shell 41 fixedly installed on both sides of the interior of the battery protection box 1, a chamber 42 is opened inside the shell 41, a piston slider 43 is slidably connected to the interior of the chamber 42, the chamber 42 at the lower end of the piston slider 43 is filled with an inert gas that is easily expanded when heated, a spring 44 is fixedly installed between the lower end of the piston slider 43 and the inner wall of the chamber 42, a connecting rod 45 is fixedly installed on the upper end of the piston slider 43, a connecting rod 2 46 is fixedly installed on the side wall of the connecting rod 1 45, a moving contact 47 is fixedly installed on one end of the connecting rod 2 46, electrode points 31 are fixedly installed on both sides of the upper end of the battery 3, and the electrode point 31 is slidably connected to the moving contact 47.

[0023] In this embodiment: when the heat generated during the use of the battery 3 is too high, the heat is conducted to the chamber 42 through the shell 41. At this time, the inert gas in the chamber 42 expands due to the heat. Under the push of the inert gas, the piston slider 43 slides upward along the inner wall of the chamber 42, and the piston slider 43 drives the upper connecting rod 1 45 and the connecting rod 2 46 to move upward. During the movement, the connecting rod 2 46 drives the moving contact 47 away from the electrode point 31. At this time, the power can be automatically cut off when the temperature is high. Stopping the flow of current can cut off the source of heat energy. When the temperature drops to normal, the inert gas contracts. Under the action of the spring 44, the moving contact 47 is pulled again to contact the electrode point 31, and the power is connected again. When the battery temperature is abnormal, the device can automatically disconnect the power line, causing the battery to stop working, and can automatically connect the line again when the temperature drops to normal.

[0024] Example 2: This example is an improvement made on the basis of Example 1. For details, please refer to Figure 2 - Figure 4 The upper end of the moving contact 47 is provided with a thread groove 49, and the thread groove 49 is threadedly connected to the useful power circuit. By threading the power circuit into the thread groove 49, the moving contact 47 can simultaneously drive the power circuit to move.

[0025] A metal plate 48 is fixedly mounted on the side wall of the moving contact 47, and magnets 32 are fixedly mounted on both sides of the upper end of the battery 3. The magnets 32 are arranged on the sides of the electrode point 31. There is a mutual attraction between the metal plate 48 and the magnets 32. The arrangement of the magnets 32 can make the contact between the moving contact 47 and the electrode point 31 closer.

[0026] Connecting blocks 33 are fixedly installed on both sides of the upper end of the battery 3, and touch alarm devices 34 are fixedly installed on the inner wall of the lower end of the connecting blocks 33. A metal plate 48 is movably connected to the lower end of the touch alarm device 34. When the metal plate 48 moves, it can trigger the overheating alarm of the touch alarm device 34.

[0027] A fixed plate 5 is fixedly installed on the side wall of the connecting rod 45, and a movable filter screen 51 is fixedly installed on the lower end of the fixed plate 5. A plurality of filter holes 52 are evenly spaced on the movable filter screen 51. When the connecting rod 45 moves, it drives the movable filter screen 51 to move up and down.

[0028] A plurality of filter holes 11 are equidistantly provided on both side walls of the battery protection box 1. The number, size and spacing of the plurality of filter holes 52 and the plurality of filter holes 11 are the same, and the two are staggered. When the movable filter screen 51 moves, the filter holes 52 and the filter holes 11 are relatively displaced, and the opening area between the two becomes larger.

[0029] In this embodiment: when the operating temperature of the battery 3 is too high, the inert gas in the chamber 42 expands due to the heat and drives the upper connecting rod 45 to move upward through the piston slider 43. When the connecting rod 45 moves, it drives the fixed plate 5 of the side wall and the movable filter 52 to slide upward along the inner wall of the battery protection box 1. At this time, the filter hole 1 52 on the movable filter 52 and the filter hole 2 11 on the side wall of the battery protection box 1 are relatively displaced, and the air vent area formed between the two is getting larger and larger. At this time, the large-aperture heat dissipation hole has a better heat dissipation effect. When the temperature drops to normal temperature, the spring 44 pulls the piston slider 43 back to its original position. Under the action of the magnet 32, the metal plate 48 makes the moving contact 47 close contact with the electrode point 31 at the lower end, and the power is turned on again.

[0030] The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0031] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A thermal runaway warning device for battery management, comprising a battery protection box (1) and a battery (3) installed inside the battery protection box (1), wherein a protective cover (2) is movably installed on the upper end of the battery protection box (1), and characterized in that: An overheat protection device (4) is installed on both sides of the battery protection box (1). The overheat protection device (4) includes a shell (41) fixedly installed on both sides of the battery protection box (1). A chamber (42) is opened inside the shell (41). A piston slider (43) is slidably connected to the inside of the chamber (42). The chamber (42) at the lower end of the piston slider (43) is filled with an inert gas that is easily expanded when heated. A spring (44) is fixedly installed between the lower end of the piston slider (43) and the inner wall of the chamber (42). A connecting rod 1 (45) is fixedly installed on the upper end of the piston slider (43). A connecting rod 2 (46) is fixedly installed on the side wall of the connecting rod 1 (45). A moving contact (47) is fixedly installed on one end of the connecting rod 2 (46). Electrode points (31) are fixedly installed on both sides of the upper end of the battery (3). The electrode point (31) is slidably connected to the moving contact (47).

2. The thermal runaway warning device for battery management according to claim 1, characterized in that: The upper ends of the movable contacts (47) are each provided with a threaded groove (49), and the inner threads of the threaded groove (49) are connected to a useful electric circuit.

3. The thermal runaway warning device for battery management according to claim 2, characterized in that: A metal plate (48) is fixedly mounted on the side wall of the movable contact (47), and magnets (32) are fixedly mounted on both sides of the upper end of the battery (3). The magnets (32) are arranged on the sides of the electrode point (31), and there is a mutual attraction between the metal plate (48) and the magnets (32).

4. The thermal runaway warning device for battery management according to claim 3, characterized in that: Connecting blocks (33) are fixedly mounted on both sides of the upper end of the battery (3), and a touch alarm device (34) is fixedly mounted on the inner wall of the lower end of the connecting block (33). The metal plate (48) is movably connected to the lower end of the touch alarm device (34).

5. The thermal runaway warning device for battery management according to claim 4, characterized in that: A fixed plate (5) is fixedly mounted on the side wall of the connecting rod (45), a movable filter (51) is fixedly mounted on the lower end of the fixed plate (5), and a plurality of filter holes (52) are equidistantly formed on the movable filter (51).

6. The thermal runaway warning device for battery management according to claim 5, characterized in that: The side walls of the battery protection box (1) are equidistantly provided with a plurality of filter holes 2 (11), the number and spacing of the plurality of filter holes 1 (52) and the plurality of filter holes 2 (11) are the same, and the two are staggered.

Images