An embedded lithium battery protection device

Abstract

The present invention discloses an embedded lithium battery protection device, which belongs to the field of lithium battery technology, including a battery box, a lithium battery installed at the middle position inside the battery box, a front cover located at the front end of the battery box, and an exhaust fan installed on the front cover, the inner side of the battery box is evenly and vertically fixed with a limiting column, and the end of the limiting column is in contact with the outer side of the lithium battery. The present invention is slidably installed with a scraper at both ends of the top of the filter, and the scraper cooperates with a pulling assembly composed of a plugging plate, a pull rope, a second reset spring, a vertical groove, and a drainage port, and a limiting assembly composed of an installation groove, a compression spring, an arc-shaped plug block, a second slide rod, and an arc-shaped slot for use. When the top of the filter is covered with dust, the permeability will decrease. At this time, the inside of the battery box is in a negative pressure state, and the plugging plate is subjected to a downward pulling force, and the limiting state of the plugging plate is released. The plugging plate can control the horizontal movement of the scraper by using a pull rope to self-clean the surface of the filter, thereby ensuring the heat dissipation effect during use.

Description

Technical Field

[0001] The invention relates to a protection device, in particular to an embedded lithium battery protection device, and belongs to the technical field of lithium batteries. Background Art

[0002] Embedded lithium batteries are a form of battery application that integrates lithium batteries into various electronic devices, products or systems in an embedded manner. They have relatively high energy density and can store more electrical energy in a smaller volume and weight. This allows devices embedded with such batteries to maintain a smaller volume and lighter weight while ensuring a certain battery life or usage time, which is in line with the development trend of modern electronic devices towards portability. In order to ensure their safety, stability and extend their service life, they need to be used with protective devices.

[0003] In the prior art, for example, the invention with application number CN202210488814.9 discloses a lithium battery protection device. In order to solve the problem that the lithium battery protection device on the market has poor ventilation performance, which makes it impossible for the working heat of the lithium battery to dissipate and causes the service life of the lithium battery to decline, the heat of the shock-absorbing heat-conducting sleeve is conducted through the battery mounting frame to dissipate the heat as a whole, and the heat dissipation efficiency is high. The two screws are driven to rotate by turning on the motor, and the rotation of the screw drives the sliding sleeve to move laterally thereon. The motor is a forward and reverse motor that drives the sliding sleeve to slide back and forth, thereby driving the air outlet plate to slide back and forth laterally, so that the cold air dissipates the heat of the battery mounting frame and the lithium battery as a whole, and the heat dissipation efficiency is high. The hot air is discharged through the heat dissipation mesh ports distributed on the upper and lower sides of the battery mounting frame. The battery can be dissipated and shock-absorbingly protected by the shock-absorbing heat-conducting sleeve. The lithium battery can be pulled out with the battery mounting frame for inspection and replacement. The supplied cold air is filtered of moisture and dust by the air filter box, and the internal lithium battery is reliably protected.

[0004] Similar to the above application, there are still some shortcomings:

[0005] In the process of heat dissipation and cooling, although the air filter can be used to filter the intake air, the filter cannot be self-cleaned. After long-term use, a lot of dust will adhere to the outer surface of the filter, affecting the intake air cooling effect. In addition, the device adopts a mobile cooling method to evenly cool the lithium battery. If the lithium battery heats up unevenly, it is impossible to accelerate the heat dissipation of the high heat dissipation area, affecting the heat dissipation effect.

[0006] Therefore, an embedded lithium battery protection device is designed to optimize the above problems. Summary of the invention

[0007] The main purpose of the present invention is to provide an embedded lithium battery protection device, in which scrapers are slidably installed at both ends of the top of the filter, and the scrapers are used in conjunction with a pulling assembly composed of a blocking plate, a pull rope, a second return spring, a vertical groove, and a drainage port, and a limiting assembly composed of an installation groove, a compression spring, an arc-shaped plug block, a second sliding rod, and an arc-shaped slot. When the top of the filter is covered with dust, the permeability will decrease. At this time, the inside of the battery box is in a negative pressure state, and the blocking plate is pulled downward to release the limiting state of the blocking plate. The blocking plate can control the horizontal movement of the scraper by using the pull rope to self-clean the surface of the filter, thereby ensuring the heat dissipation effect during use. A dust collecting groove is opened inside the vertical plate, and a dust inlet is opened on the side of the dust collecting groove close to the filter. A The sealing plate is fixed at the end of the second sliding rod, so that after the limiting state of the blocking plate is released, the second sliding rod moves toward the blocking plate, and the sealing plate also releases the sealing state of the dust inlet at the same time, and the dust scraped off by the scraper can be pushed to the dust collection tank for storage, and will not cause secondary pollution to the surface of the filter. It is more practical, and a cross rod is arranged between the partition and the tail end of the lithium battery, so that the four groups of air inlet vents can be blocked to ensure that each air inlet vent is aligned with one side of the lithium battery for cooling, and then with the air outlet adjustment mechanism composed of a spiral bimetallic strip, a rotating rod, a limiting block, a lever, a pull rod, a connecting column, and a slide plate, the size of the air inlet opening can be regulated to increase the air intake to the high-heat side and improve the heat dissipation effect on the heat side.

[0008] The purpose of the present invention can be achieved by adopting the following technical solutions:

[0009] An embedded lithium battery protection device comprises a battery box, a lithium battery installed at a middle position inside the battery box, a front cover located at the front end of the battery box, and an exhaust fan installed on the front cover, the inner side of the battery box is evenly and vertically fixed with a limit column, and the end of the limit column is in contact with the outer side of the lithium battery, a partition is provided at the rear end of the battery box, and air inlet vents are evenly opened in a rectangular array on the partition, and four groups of air inlet vents are opened, a cross plate is provided between the bottom of the partition and the end of the lithium battery, and an air outlet adjustment mechanism for adjusting the size of the air inlet vent is provided on the four sides of the battery box, vertical plates are symmetrically provided at both ends of the top of the partition, the air inlet vent is located between the two groups of vertical plates, a filter is provided between the tops of the vertical plates, and a cleaning mechanism is provided on the top of the filter.

[0010] Preferably: the cleaning mechanism includes a scraper, a pulling assembly and a reset assembly, the scraper is symmetrically slidably arranged in the middle position of the filter, the side of the battery box is provided with a pulling assembly for controlling the horizontal sliding of the scraper, and the inner side of the battery box is provided with a reset assembly for controlling the resetting of the scraper.

[0011] Preferably: the reset component includes a slide groove, a first slider, a first slide rod and a first reset spring, the slide groove is respectively opened at the top and bottom of the battery box along the width direction of the battery box, the first slider is symmetrically slidably arranged inside the slide groove, the two ends of the scraper are respectively fixedly connected to the first slider at the top and bottom of the battery box, the first slide rod is fixed between the two ends of the slide groove, the first slide rod is slidably connected to the first slider, the first reset spring is arranged between the end of the slide groove and the first slider, and the first slide rod passes through the first reset spring.

[0012] Preferably: the pulling assembly includes a blocking plate, a pull rope, a second return spring, a drainage port and a limiting portion, the blocking plate is slidably arranged between the vertical plate and the inner side of the battery box along the length direction of the battery box, a pull rope is fixed between the side of the blocking plate close to the vertical plate and the scraper, the pull rope slides through the inside of the vertical plate, a second return spring is arranged between the blocking plate and the partition, the bottom of the vertical plate is provided with a drainage port, and a limiting portion is arranged between the top of the outer side of the vertical plate and the blocking plate.

[0013] Preferably, a vertical groove is provided on the side of the battery box along the length direction, a second sliding block is slidably provided inside the vertical groove, and the second sliding block is fixedly connected to the blocking plate.

[0014] Preferably: the limiting part includes an installation groove, a compression spring, an arc-shaped plug block, a second sliding rod and an arc-shaped slot, the installation groove is opened at the top of the outer side of the vertical plate, a compression spring is arranged inside the installation groove, an arc-shaped plug block is fixed at the end of the compression spring, a second sliding rod is fixed on the arc-shaped plug block, and the second sliding rod passes through the compression spring and is slidably connected with the vertical plate, and an arc-shaped slot cooperating with the arc-shaped plug block is opened on the blocking plate.

[0015] Preferably, a slope is provided on one side of the top of the blocking plate close to the vertical plate, and the horizontal width of the slope is greater than the horizontal protruding length of the arc-shaped plug.

[0016] Preferably: a dust collecting groove is provided at the inner top of the vertical plate, both ends of the dust collecting groove are connected to the outside of the battery box, and rubber covers are provided at the ends of the dust collecting groove, a dust inlet is provided at the top of the dust collecting groove close to the filter screen, a sealing plate is provided inside the dust inlet for sliding, and the sealing plate is fixedly connected to the end of the second sliding rod.

[0017] Preferably: a guide groove, a slide plate and a translation component, the guide groove is opened on the side of the air inlet port, and the guide groove is perpendicular to the side direction of the battery box, a slide plate is slidably arranged inside the guide groove perpendicular to the side direction of the battery box, and a translation component for controlling the slide plate to slide inside the guide groove is arranged on the inner side of the battery box.

[0018] Preferably: the translation assembly includes a spiral bimetallic strip, a rotating rod, a limit block, a lever, a pull rod and a connecting column, the spiral bimetallic strip is arranged on the four sides of the battery box along the length direction of the battery box, one end of the spiral bimetallic strip close to the front end cover is fixedly connected to the battery box, the movable end of the spiral bimetallic strip is fixed with a rotating rod, the inner side of the battery box is fixed with a limit block, the rotating rod passes through the inside of the limit block and is rotatably connected to the rotating rod, the side edge of the top of the rotating rod is vertically fixed with a lever, the end of the lever is hingedly installed with a pull rod, the bottom of the skateboard is rotatably installed with a connecting column, and the end of the pull rod is connected to the connecting column.

[0019] The beneficial effects of the present invention are:

[0020] The present invention provides an embedded lithium battery protection device, wherein scrapers are slidably installed at both ends of the top of the filter, and the scrapers are used in conjunction with a pulling assembly consisting of a blocking plate, a pull rope, a second return spring, a vertical groove, and a drainage port, and a limiting assembly consisting of an installation groove, a compression spring, an arc-shaped plug block, a second slide rod, and an arc-shaped slot. When the top of the filter is covered with dust, the permeability will decrease. At this time, the inside of the battery box is in a negative pressure state, and the blocking plate is subjected to a downward pulling force, so that the limiting state of the blocking plate is released. The blocking plate can control the horizontal movement of the scraper by using the pull rope to self-clean the surface of the filter, thereby ensuring the heat dissipation effect during use.

[0021] A dust collecting groove is provided inside the vertical plate, and a dust inlet is provided on one side of the dust collecting groove close to the filter screen, a sealing plate is slidably installed at the dust inlet, and the sealing plate is fixed to the end of the second sliding rod, so that after the limiting state of the blocking plate is released, the second sliding rod moves toward the blocking plate, and the sealing plate also releases the sealing state of the dust inlet at the same time, and the dust scraped by the scraper can be pushed into the dust collecting groove for storage, which will not cause secondary pollution to the surface of the filter screen, and the practicality is higher;

[0022] By arranging a cross rod between the partition and the rear end of the lithium battery, the four groups of air inlet vents can be blocked to ensure that each air inlet vent is aligned with one side of the lithium battery for cooling. Combined with the air outlet adjustment mechanism composed of a spiral bimetallic strip, a rotating rod, a limit block, a lever, a pull rod, a connecting column, and a slide plate, the size of the air inlet vent opening can be regulated to increase the air intake to the high-heat side and improve the heat dissipation effect on the heat side. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A top cross-sectional view of a preferred embodiment of an embedded lithium battery protection device of the present invention;

[0024] Figure 2 It is a front view of a preferred embodiment of an embedded lithium battery protection device of the present invention;

[0025] Figure 3 A partial structural diagram of the battery box tail end of a preferred embodiment of an embedded lithium battery protection device of the present invention;

[0026] Figure 4 A preferred embodiment of an embedded lithium battery protection device of the present invention Figure 3 Enlarged view of point A in the middle;

[0027] Figure 5 A cross-sectional view of a vertical plate in a cleaning state of a preferred embodiment of an embedded lithium battery protection device of the present invention;

[0028] Figure 6 A preferred embodiment of an embedded lithium battery protection device of the present invention Figure 3 Enlarged view of point B in the middle;

[0029] Figure 7 This is a side structural diagram of a partition in a preferred embodiment of an embedded lithium battery protection device of the present invention;

[0030] Figure 8 This is a diagram of an air outlet adjustment mechanism of a preferred embodiment of an embedded lithium battery protection device of the present invention.

[0031] In the figure: 1. battery box; 2. lithium battery; 3. limit column; 4. front end cover; 5. exhaust fan; 6. partition; 7. air inlet; 8. vertical plate; 9. filter; 10. cleaning mechanism; 11. cross plate; 12. air outlet adjustment mechanism; 13. slide groove; 14. first slider; 15. first slide rod; 16. first return spring; 17. scraper; 18. blocking plate; 19. pull rope; 20. second return spring; 21. vertical groove; 22. drainage port; 23. mounting groove; 24. compression spring; 25. arc plug block; 26. second slide rod; 27. arc slot; 28. dust collecting groove; 29. ​​dust inlet; 30. sealing plate; 31. spiral bimetallic strip; 32. rotating rod; 33. limit block; 34. lever; 35. pull rod; 36. guide groove; 37. slide plate; 38. connecting column. DETAILED DESCRIPTION

[0032] In order to make the technical solution of the present invention more clear and specific to those skilled in the art, the present invention is further described in detail below in conjunction with embodiments and drawings, but the implementation manner of the present invention is not limited thereto.

[0033] like Figure 1-Figure 8As shown, the present embodiment provides an embedded lithium battery protection device, comprising a battery box 1, a lithium battery 2 installed at the middle position inside the battery box 1, a front cover 4 located at the front end of the battery box 1, and an exhaust fan 5 installed on the front cover 4, the inner side surface of the battery box 1 is evenly and vertically fixed with a limiting column 3, and the end of the limiting column 3 is in contact with the outer side surface of the lithium battery 2, a partition 6 is provided at the rear end of the battery box 1, and air inlet vents 7 are evenly opened in a rectangular array on the partition 6, and four groups of air inlet vents 7 are opened, a cross plate 11 is provided between the bottom of the partition 6 and the end of the lithium battery 2, and an air outlet adjustment mechanism 12 for adjusting the size of the air inlet vent 7 is provided on the four sides of the battery box 1, vertical plates 8 are symmetrically arranged at both ends of the top of the partition 6, the air inlet vent 7 is located between the two groups of vertical plates 8, a filter screen 9 is provided between the tops of the vertical plates 8, and a cleaning mechanism 10 is provided on the top of the filter screen 9.

[0034] Overall working principle: During the installation of the lithium battery 2, due to the multiple groups of limit columns 3, there is a gap between the four sides of the lithium battery 2 and the four sides of the battery box 1. During the heat dissipation process, the external gas is filtered by the filter 9 and then enters the interior of the battery box 1 through the air inlet 7. Due to the guiding effect of the cross plate 11, each air inlet 7 is aligned with one side of the lithium battery 2, and the external air flow will tend to flow through this side to cool down the side. At the same time, in the initial state, the opening size of each air inlet 7 is the same, and the gas It can pass through multiple groups of air inlet ports 7 evenly. If the temperature rises on one side, the air outlet regulating mechanism 12 will expand the opening range of the air inlet port 7 at that location, and more gas will enter from the air inlet port 7 to accelerate the heat dissipation on the side of the lithium battery 2 where the heat is higher. Finally, the gas will be discharged to the outside from the discharge end of the exhaust fan 5. When used for a long time, the dust from the outside will adhere to the surface of the filter 9, causing the permeability of the filter 9 to decrease. At this time, the cleaning mechanism 10 is used to self-clean the surface of the filter 9 to ensure the permeability of the filter 9.

[0035] In this embodiment, the cleaning mechanism 10 includes a scraper 17, a pulling assembly and a reset assembly. The scraper 17 is symmetrically slidably arranged in the middle position of the filter 9. The side of the battery box 1 is provided with a pulling assembly for controlling the horizontal sliding of the scraper 17, and the inner side of the battery box 1 is provided with a reset assembly for controlling the reset of the scraper 17.

[0036] Local working principle: During the surface cleaning process of the filter 9, the pulling assembly will drive the two groups of scrapers 17 to move toward the two sides of the filter 9 to scrape off the adhesions on the surface of the filter 9, and after scraping, the scrapers 17 are reset using the reset assembly.

[0037] In this embodiment, the reset component includes a slide groove 13, a first slider 14, a first slide rod 15 and a first reset spring 16. The slide groove 13 is respectively opened at the top and bottom of the battery box 1 along the width direction of the battery box 1. The first slider 14 is symmetrically slidably arranged inside the slide groove 13. The two ends of the scraper 17 are respectively fixedly connected to the first slider 14 at the top and bottom of the battery box 1. A first slide rod 15 is fixed between the two ends of the slide groove 13. The first slide rod 15 is slidably connected to the first slider 14. A first reset spring 16 is provided between the end of the slide groove 13 and the first slider 14, and the first slide rod 15 passes through the first reset spring 16.

[0038] Local working principle: During the process of cleaning the surface of the filter 9, the movement of the scraper 17 will drive the first slider 14 to slide inside the slide groove 13 and squeeze the first return spring 16. When the surface of the filter 9 is cleaned, the pulling assembly is reset, and the first return spring 16 controls the first slider 14 to drive the scraper 17 to reset.

[0039] In this embodiment, the pulling assembly includes a blocking plate 18, a pull rope 19, a second return spring 20, a drainage port 22 and a limiting portion. The blocking plate 18 is slidably arranged between the vertical plate 8 and the inner side of the battery box 1 along the length direction of the battery box 1. A pull rope 19 is fixed between the side of the blocking plate 18 close to the vertical plate 8 and the scraper 17. The pull rope 19 slides through the inside of the vertical plate 8. A second return spring 20 is arranged between the blocking plate 18 and the partition 6. A drainage port 22 is opened at the bottom of the vertical plate 8, and a limiting portion is arranged between the top of the outer side of the vertical plate 8 and the blocking plate 18.

[0040] Local working principle: when the surface of the filter 9 is seriously clogged, the air intake volume is reduced when the exhaust fan 5 works at the same power, which will cause the interior of the battery box 1 to be in a negative pressure state, and apply a certain downward pulling force to the bottom of the blocking plate 18. When the downward pulling force is greater than the resistance of the limiting part to the blocking plate 18, the positioning state of the blocking plate 18 is instantly released, and the blocking plate 18 will move vertically downward, not only pressing down the second return spring 20, but also pulling the scraper 17 through the pull rope 19. After cleaning the filter 9, the air intake volume will increase, and the downward pulling force of the blocking plate 18 will decrease. The second return spring 20 and the first return spring 16 will apply an upward force to the blocking plate 18 to control the resetting of the blocking plate 18, and the position of the blocking plate 18 is limited by the limiting part again.

[0041] In this embodiment, a vertical groove 21 is formed on the side of the battery box 1 along the length direction. A second sliding block is slidably disposed inside the vertical groove 21 , and the second sliding block is fixedly connected to the blocking plate 18 .

[0042] Partial working principle: When the blocking plate 18 moves downward, it will drive the second slider to slide inside the vertical groove 21 to ensure that the blocking plate 18 slides horizontally and avoids the blocking plate 18 from tilting.

[0043] In this embodiment, the limiting portion includes a mounting groove 23, a compression spring 24, an arc-shaped plug block 25, a second sliding rod 26 and an arc-shaped slot 27. The mounting groove 23 is opened at the top of the outer side of the vertical plate 8. A compression spring 24 is arranged inside the mounting groove 23. An arc-shaped plug block 25 is fixed to the end of the compression spring 24. A second sliding rod 26 is fixed on the arc-shaped plug block 25. The second sliding rod 26 passes through the compression spring 24 and is slidably connected with the vertical plate 8. An arc-shaped slot 27 cooperating with the arc-shaped plug block 25 is opened on the blocking plate 18.

[0044] Local working principle: in the initial state, the compression spring 24 is compressed to apply a thrust to the arc-shaped plug 25, and the arc-shaped plug 25 is inserted into the interior of the arc-shaped slot 27 to limit the blocking plate 18. When the downward pulling force of the blocking plate 18 increases, the arc-shaped plug 25 will be squeezed toward the interior of the mounting groove 23. After the downward pulling force is greater than the resistance applied by the arc-shaped plug 25 to the blocking plate 18, the arc-shaped plug 25 will first be squeezed into the interior of the mounting groove 23, and after the blocking plate 18 moves down, it will extend outward under the elastic force of the compression spring 24. In the process of resetting the blocking plate 18, the arc-shaped plug 25 will be squeezed toward the interior of the mounting groove 23 again. When the arc-shaped plug 25 is aligned with the arc-shaped slot 27, the position of the blocking plate 18 is limited again.

[0045] In this embodiment, a slope is provided on one side of the top of the blocking plate 18 close to the vertical plate 8 , and the horizontal width of the slope is greater than the horizontal protruding length of the arc-shaped insert block 25 .

[0046] Partial working principle: The setting of the inclined surface can ensure that when the blocking plate 18 moves upward and the arc-shaped plug block 25 is in contact with it, a horizontal thrust can be applied to the arc-shaped plug block 25, so as to facilitate the rapid resetting of the blocking plate 18.

[0047] In this embodiment, a dust collecting groove 28 is opened at the inner top of the vertical plate 8, both ends of the dust collecting groove 28 are connected to the outside of the battery box 1, and rubber covers are provided at the ends of the dust collecting groove 28. A dust inlet 29 is opened at the top of the dust collecting groove 28 close to the filter 9, and a sealing plate 30 is slidingly provided inside the dust inlet 29, and the sealing plate 30 is fixedly connected to the end of the second sliding rod 26.

[0048] Local working principle: During the cleaning process of the filter 9 surface, the arc-shaped plug 25 loses the obstruction of the blocking plate 18, and the arc-shaped plug 25 is reset under the elastic force of the compression spring 24. The arc-shaped plug 25 will move toward the side of the battery box 1, and at the same time, the second slide rod 26 drives the sealing plate 30 to move to the inside of the dust collection groove 28, and the dust inlet 29 is opened. The impurities scraped off the filter 9 by the scraper 17 will be pushed into the dust collection groove 28 for storage. After the impurity cleaning is completed, the blocking plate 18 is reset, and the sealing plate 30 blocks the dust inlet 29 again, effectively preventing impurities from sticking to the filter 9 again.

[0049] In this embodiment, the guide groove 36, the slide plate 37 and the translation component, the guide groove 36 is opened on the side of the air inlet port 7, and the guide groove 36 is perpendicular to the side direction of the battery box 1, and the slide plate 37 is slidably provided inside the guide groove 36 perpendicular to the side direction of the battery box 1, and the inner side of the battery box 1 is provided with a translation component for controlling the slide plate 37 to slide inside the guide groove 36.

[0050] Local working principle: When more heat is generated on one side of the lithium battery 2, the temperature of the side rises, and the slide plate 37 aligned with the inside of the guide groove 36 slides under the control of the translation assembly, increasing the opening range of the air inlet 7, increasing the air intake volume, and accelerating the heat dissipation rate of the side.

[0051] In this embodiment, the translation assembly includes a spiral bimetallic strip 31, a rotating rod 32, a limit block 33, a lever 34, a pull rod 35 and a connecting column 38. The spiral bimetallic strip 31 is arranged on the four sides of the battery box 1 along the length direction of the battery box 1. The end of the spiral bimetallic strip 31 close to the front end cover 4 is fixedly connected to the battery box 1. The movable end of the spiral bimetallic strip 31 is fixed with a rotating rod 32. The limit block 33 is fixed on the inner side of the battery box 1. The rotating rod 32 passes through the inside of the limit block 33 and is rotatably connected to the rotating rod 32. The lever 34 is vertically fixed to the side of the top of the rotating rod 32. The end of the lever 34 is hingedly installed with a pull rod 35. The bottom of the slide plate 37 is rotatably installed with a connecting column 38, and the end of the pull rod 35 is connected to the connecting column 38.

[0052] Local working principle: Due to the different thermal expansion coefficients of the component layers of the bimetallic strip, when the temperature changes, the deformation of the active layer is greater than that of the passive layer, so that the bimetallic strip as a whole will bend toward the passive layer. The spiral bimetallic strip 31 here has the same structure as the bimetallic strip inside the bimetallic thermometer. After detecting the increase in temperature on one side of the lithium battery 2, the spiral bimetallic strip 31 will rotate, driving the rotating rod 32 and the lever 34 to rotate. During the rotation process, the lever 34 will cooperate with the pull rod 35 and the connecting column 38 to apply a moving pulling force to the slide plate 37, control the slide plate 37 to slide inside the guide groove 36, expand the opening size of the air inlet 7, and increase the air intake. When the temperature on this side drops, the spiral bimetallic strip 31 automatically resets, and the slide plate 37 also resets accordingly.

[0053] The above description is only a further embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and concepts of the present invention within the scope disclosed by the present invention, which belong to the protection scope of the present invention.

Claims

1. An embedded lithium battery protection device, comprising a battery box (1), a lithium battery (2) installed at a middle position inside the battery box (1), a front cover (4) located at the front end of the battery box (1), and an exhaust fan (5) installed on the front cover (4), characterized in that: The inner side of the battery box (1) is evenly and vertically fixed with a limit column (3), and the end of the limit column (3) is in contact with the outer side of the lithium battery (2). The rear end of the battery box (1) is provided with a partition (6), and the partition (6) is evenly provided with air inlet openings (7) in a rectangular array, and four groups of air inlet openings (7) are provided. A cross plate (11) is provided between the bottom of the partition (6) and the end of the lithium battery (2). The four sides of the battery box (1) are all provided with an air outlet adjustment mechanism (12) for adjusting the size of the air inlet opening (7). Vertical plates (8) are symmetrically provided at both ends of the top of the partition (6), and the air inlet opening (7) is located between the two groups of vertical plates (8). A filter screen (9) is provided between the tops of the vertical plates (8), and a cleaning mechanism (10) is provided on the top of the filter screen (9); The cleaning mechanism (10) comprises a scraper (17), a pulling assembly and a reset assembly, wherein the scraper (17) is symmetrically slidably arranged at a middle position of the filter screen (9), a pulling assembly for controlling the horizontal sliding of the scraper (17) is arranged on the side of the battery box (1), and a reset assembly for controlling the reset of the scraper (17) is arranged on the inner side of the battery box (1); The reset assembly comprises a slide groove (13), a first slider (14), a first slide rod (15) and a first reset spring (16); the slide groove (13) is respectively arranged at the top and bottom of the battery box (1) along the width direction of the battery box (1); the first slider (14) is symmetrically slidably arranged inside the slide groove (13); the two ends of the scraper (17) are respectively fixedly connected to the first slider (14) at the top and bottom of the battery box (1); the first slide rod (15) is fixed between the two ends of the slide groove (13); the first slide rod (15) and the first slider (14) are slidably connected; the first reset spring (16) is arranged between the end of the slide groove (13) and the first slider (14); the first slide rod (15) passes through the first reset spring (16).

2. The embedded lithium battery protection device according to claim 1, characterized in that: The pulling assembly comprises a blocking plate (18), a pull rope (19), a second return spring (20), a drainage port (22) and a limiting portion. The blocking plate (18) is slidably arranged between the vertical plate (8) and the inner side of the battery box (1) along the length direction of the battery box (1). A pull rope (19) is fixed between the side of the blocking plate (18) close to the vertical plate (8) and the scraper (17). The pull rope (19) slides through the inside of the vertical plate (8). A second return spring (20) is arranged between the blocking plate (18) and the partition (6). The bottom of each vertical plate (8) is provided with a drainage port (22). A limiting portion is arranged between the top of the outer side of the vertical plate (8) and the blocking plate (18).

3. The embedded lithium battery protection device according to claim 2, characterized in that: A vertical groove (21) is provided on the side of the battery box (1) along the length direction, a second sliding block is slidably arranged inside the vertical groove (21), and the second sliding block is fixedly connected to the blocking plate (18).

4. The embedded lithium battery protection device according to claim 3, characterized in that: The limiting portion comprises a mounting groove (23), a compression spring (24), an arc-shaped plug block (25), a second slide rod (26) and an arc-shaped slot (27). The mounting groove (23) is provided at the top of the outer side of the vertical plate (8). A compression spring (24) is arranged inside the mounting groove (23). An arc-shaped plug block (25) is fixed to the end of the compression spring (24). A second slide rod (26) is fixed to the arc-shaped plug block (25). The second slide rod (26) passes through the compression spring (24) and is slidably connected to the vertical plate (8). An arc-shaped slot (27) cooperating with the arc-shaped plug block (25) is provided on the blocking plate (18).

5. The embedded lithium battery protection device according to claim 4, characterized in that: A slope is provided on one side of the top of the blocking plate (18) close to the vertical plate (8), and the horizontal width of the slope is greater than the horizontal protruding length of the arc-shaped insert (25).

6. The embedded lithium battery protection device according to claim 5, characterized in that: A dust collecting groove (28) is provided at the inner top of the vertical plate (8), the two ends of the dust collecting groove (28) are connected to the outside of the battery box (1), and the ends of the dust collecting groove (28) are provided with rubber covers. A dust inlet (29) is provided at the top of the dust collecting groove (28) on the side close to the filter (9), and a sealing plate (30) is slidably provided inside the dust inlet (29), and the sealing plate (30) is fixedly connected to the end of the second sliding rod (26).

7. The embedded lithium battery protection device according to claim 6, characterized in that: A guide groove (36), a slide plate (37) and a translation assembly, wherein the guide groove (36) is provided on the side of the air inlet port (7), and the guide groove (36) is perpendicular to the side direction of the battery box (1), a slide plate (37) is provided inside the guide groove (36) so as to slide perpendicularly to the side direction of the battery box (1), and a translation assembly for controlling the slide plate (37) to slide inside the guide groove (36) is provided on the inner side of the battery box (1).

8. The embedded lithium battery protection device according to claim 7, characterized in that: The translation assembly comprises a spiral bimetallic strip (31), a rotating rod (32), a limiting block (33), a lever (34), a pull rod (35) and a connecting column (38). The spiral bimetallic strip (31) is arranged on four sides of the battery box (1) along the length direction of the battery box (1). One end of the spiral bimetallic strip (31) close to the front end cover (4) is fixedly connected to the battery box (1). The movable end of the spiral bimetallic strip (31) is fixed with a rotating rod (32). The inner side of the battery box (1) is fixed with a limiting block (33). The rotating rod (32) passes through the inside of the limiting block (33) and is rotatably connected to the rotating rod (32). The side edge of the top of the rotating rod (32) is vertically fixed with a lever (34). The end of the lever (34) is hingedly mounted with a pull rod (35). The bottom of the slide plate (37) is rotatably mounted with a connecting column (38). The end of the pull rod (35) is connected to the connecting column (38).

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