Battery protection board with short circuit protection function

Abstract

The utility model relates to battery protection technical field especially is a kind of battery protection plate with short-circuit protection function, including box body, the box body inside is provided with battery protection plate ontology, the box body rear end face is rotatably connected with box cover, the box body and box cover front end face middle fixedly connected with lock catch, the box cover inside fixedly connected with hollow shell, the hollow shell left and right two end face middle fixedly connected with hollow block, the hollow block inside slidingly connected with plug block, the plug block inner end face front side top end fixedly connected with clamping plate;The design cooperation of hollow shell and clamping plate makes the device can be aimed at different short-circuit ignition point and extinguish fire, the high temperature generated when short-circuit will melt the surface of aerosol fire extinguishing package inside hollow shell, and let aerosol cover above the ignition point of battery protection plate ontology, effectively prevent the diffusion of ignition point, while targeted fire extinguishing can effectively reduce the cost required for replacing aerosol fire extinguishing package.

Description

Technical Field

[0001] This utility model relates to the field of battery protection technology, and in particular to a battery protection board with short-circuit protection function. Background Technology

[0002] A battery protection board is a safety component used to protect battery packs, typically found in lithium-ion battery packs. Its main function is to monitor parameters such as voltage, current, and temperature of the battery pack to ensure that the battery operates within a safe range and to prevent dangerous situations such as overcharging, over-discharging, short circuits, and overheating.

[0003] Patent specification CN220695698U discloses a lithium battery protection board with short-circuit protection function, including a shell, a baffle rotatably connected to one side of the shell, and a protection board body installed at the bottom of the inner cavity of the shell. This invention enables the protection board structure to prevent the spread of open flames and facilitates the periodic replacement of the internal fire extinguishing material, saving personnel the operational steps and time required for replacing fire extinguishing material and improving the practicality of the device.

[0004] However, in implementing the relevant technology, the following problems were found with the aforementioned lithium battery protection board with short-circuit protection function: The above structure uses fire extinguishing material in a flame-retardant material bag to protect the short-circuited battery protection board, but the area of ​​the flame-retardant material bag is the same as the area of ​​the battery protection board. This results in the flame-retardant material bag covering the entire battery protection board. The complete coverage means that regardless of the size of the ignition point, a large amount of fire extinguishing material needs to be released, resulting in waste of fire extinguishing material. When the fire extinguishing material completely covers the battery protection board, undamaged electronic components may also be covered. For example, dry powder fire extinguishing material may cause corrosion or short circuits to electronic components, resulting in secondary damage. Maintenance personnel need to spend more time and effort to clean and replace damaged components, thereby increasing maintenance costs. In view of this, a battery protection board with short-circuit protection function is provided to overcome the above defects. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a battery protection board with short-circuit protection function.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a battery protection board with short-circuit protection function, comprising a box body, a battery protection board body disposed inside the box body, a box cover rotatably connected to the rear end face of the box body, a latch fixedly connected between the front faces of the box body and the box cover, a hollow shell fixedly connected to the inside of the box cover, a hollow block fixedly connected between the left and right end faces of the hollow shell, an insert block slidably connected inside the hollow block, a locking plate fixedly connected to the top of the front face of the insert block, an aerosol fire extinguishing bag placed inside the hollow shell, a sliding rod slidably connected to the upper part inside the hollow block, a pull ring fixedly connected to the top of the sliding rod, a tension spring fixedly connected to the outer side below the pull ring, a temperature sensor fixedly connected to the right side inside the box cover, a controller fixedly connected to the middle of the top right side of the box cover, a battery compartment fixedly connected to the top right side of the box cover, and an alarm light fixedly connected to the right side of the box cover.

[0007] As a further description of the above technical solution: the rear end face of the card plate contacts the front end face of the hollow shell, the rear interior of the card plate is slidably connected to the outer side below the sliding rod, the inner side of the tension spring is slidably connected to the outer side above the sliding rod, and the end of the tension spring away from the pull ring is fixedly connected to the top of the hollow block. After the surface of the aerosol fire extinguishing bag is melted, the aerosol is more targeted at the ignition point, effectively avoiding the situation where the surface of the battery protection board is completely covered by aerosol after the surface of the aerosol fire extinguishing bag covering the whole is melted, effectively reducing the cost required to replace the aerosol fire extinguishing bag.

[0008] As a further description of the above technical solution: the number of hollow shells is 4 sets, and the hollow shells are evenly distributed laterally from the top left side to the right side inside the box cover. The temperature sensor is located at the lower right side of the hollow shell at the top right side inside the box cover. It can extinguish fires for different short-circuit ignition points. The high temperature generated during a short circuit will melt the surface of the aerosol fire extinguishing pack inside the hollow shell and allow the aerosol to cover the ignition point of the battery protection board body, effectively preventing the spread of the ignition point.

[0009] As a further description of the above technical solution: the hollow shell has a groove inside, and the shape and depth of the groove inside the hollow shell are matched with the overall shape and thickness of the aerosol fire extinguishing bag. The surface melting point of the aerosol fire extinguishing bag is 85°C. The aerosol fire extinguishing bag can be placed inside the hollow shell. When the battery protection board body has a short circuit, the aerosol fire extinguishing bag can extinguish the fire at the ignition point at the first time.

[0010] As a further description of the above technical solution: the hollow block has a slot from front to back, and the longitudinal cross-sectional shape of the slot matches the longitudinal cross-sectional shape of the insert. The insert has a through hole from top to bottom on the rear side, and the diameter of the through hole matches the diameter of the bottom cross-section of the sliding rod, so that the card plate can be fixed on the front end of the hollow shell to limit the aerosol fire extinguishing bag and prevent the aerosol fire extinguishing bag from falling on the battery protection board body.

[0011] As a further description of the above technical solution: a rectangular through slot is provided in the middle of the card plate, and the length and width of the rectangular through slot in the middle of the card plate are both less than the length and width of the aerosol fire extinguishing pack by 1cm. The rectangular through slot in the card plate not only restricts the aerosol fire extinguishing pack, but also allows the ignition point generated when the battery protection board body is short-circuited to melt the surface of the aerosol fire extinguishing pack.

[0012] As a further description of the above technical solution: the temperature sensor is electrically connected to the controller, and the controller is electrically connected to the alarm light. The battery compartment supplies power to the controller and the temperature sensor. The controller activates the alarm light only if the temperature sensor detects that the temperature inside the box exceeds 85°C. When the temperature sensor detects that the temperature inside the box exceeds 85°C and melts the surface of the aerosol fire extinguishing pack, the temperature sensor activates the alarm light through the controller, allowing maintenance personnel to maintain the battery protection board body immediately.

[0013] This utility model has the following beneficial effects:

[0014] This utility model designs a battery protection board with short-circuit protection. Through its design, the device can extinguish fires targeting different short-circuit ignition points. The high temperature generated during a short circuit melts the surface of the aerosol extinguishing pack inside the hollow shell, allowing the aerosol to cover the ignition point on the battery protection board body, effectively preventing the fire from spreading. Simultaneously, the aerosol extinguishing packs are small in size and fixed side-by-side inside the cover. After the surface of the aerosol extinguishing pack is melted, the aerosol becomes more targeted at the ignition point, effectively preventing the entire surface of the aerosol extinguishing pack from melting away. With the battery protection board completely covered by aerosol, the cost of replacing the aerosol fire extinguishing pack is effectively reduced. At the same time, it prevents the aerosol from damaging the electronic components on the undamaged surface of the battery protection board, thus reducing the replacement cost after the battery protection board is damaged. A temperature sensor is installed on the right side of the inside of the box. When the temperature sensor detects that the temperature inside the box exceeds 85°C and melts the surface of the aerosol fire extinguishing pack, the temperature sensor will activate the alarm light through the controller, allowing maintenance personnel to maintain the battery protection board immediately. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the lid closing structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the hollow shell explosion structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the longitudinal cross-sectional structure of the hollow block of this utility model.

[0019] Legend:

[0020] 1. Box body; 2. Battery protection board body; 3. Box cover; 4. Lock; 5. Hollow shell; 6. Hollow block; 7. Clamping plate; 8. Insert block; 9. Aerosol fire extinguishing bag; 10. Temperature sensor; 11. Controller; 12. Battery compartment; 13. Alarm light; 14. Sliding rod; 15. Pull ring; 16. Tension spring. Detailed Implementation

[0021] Reference Figures 1 to 4 This utility model provides a battery protection board with short-circuit protection function, including a box body 1, a battery protection board body 2 disposed inside the box body 1, a box cover 3 connected to the rear end face of the box body 1 by a hinge, a latch 4 disposed between the front faces of the box body 1 and the box cover 3, a hollow shell 5 welded to the inside of the box cover 3, a hollow block 6 welded between the left and right ends of the hollow shell 5, an insert 8 inserted into and sliding inside the hollow block 6, a retaining plate 7 welded to the top of the front end of the inner end of the insert 8, an aerosol fire extinguishing pack 9 placed inside the hollow shell 5, a sliding rod 14 penetrating and sliding inside the upper part of the hollow block 6, a pull ring 15 welded to the top of the sliding rod 14, a tension spring 16 welded to the outer side below the pull ring 15, a temperature sensor 10 fixed to the right side of the inside of the box cover 3 by screws, and a temperature sensor 10 fixed to the right side of the surface of the box cover 3. The controller 11 is fixed to the top center of the side with screws. The battery compartment 12 is fixed to the top right side of the cover 3 with screws. An alarm light 13 is set on the right side of the cover 3. The rear end of the card plate 7 contacts the front end of the hollow shell 5. The rear inside of the card plate 7 is slidably connected to the outer side below the sliding rod 14. The inner side of the tension spring 16 is slidably connected to the outer side above the sliding rod 14. The end of the tension spring 16 away from the pull ring 15 is fixedly connected to the top of the hollow block 6. After the surface of the aerosol fire extinguishing bag 9 is melted, the aerosol is more targeted to the ignition point. This effectively avoids the situation where the surface of the battery protection board body 2 is completely covered by aerosol after the surface of the aerosol fire extinguishing bag 9 is melted, effectively reducing the cost required to replace the aerosol fire extinguishing bag 9.

[0022] As a further implementation of the above technical solution: the number of hollow shells 5 is 4 sets, and the hollow shells 5 are evenly distributed horizontally from the top left side to the right side inside the cover 3. The temperature sensor 10 is located at the lower right side of the hollow shell 5 at the top right side inside the cover 3. It can extinguish fires for different short circuit ignition points. The high temperature generated during the short circuit will melt the surface of the aerosol fire extinguishing bag 9 inside the hollow shell 5 and allow the aerosol to cover the ignition point of the battery protection board body 2, effectively preventing the spread of the ignition point.

[0023] As a further implementation of the above technical solution: the hollow shell 5 has a groove inside, and the shape and depth of the groove inside the hollow shell 5 are matched with the overall shape and thickness of the aerosol fire extinguishing bag 9. The surface melting point of the aerosol fire extinguishing bag 9 is 85°C. The aerosol fire extinguishing bag 9 can be placed inside the hollow shell 5. When the battery protection board body 2 is short-circuited, the aerosol fire extinguishing bag 9 can extinguish the fire at the ignition point at the first time.

[0024] As a further implementation of the above technical solution: the hollow block 6 has a slot from front to back inside, and the longitudinal cross-sectional shape of the slot matches the longitudinal cross-sectional shape of the insert 8. The insert 8 has a through hole from top to bottom on the rear side inside, and the diameter of the through hole matches the diameter of the bottom cross-section of the sliding rod 14, so that the card plate 7 can be fixed on the front end of the hollow shell 5 to limit the aerosol fire extinguishing bag 9 and prevent the aerosol fire extinguishing bag 9 from falling on the battery protection board body 2.

[0025] As a further implementation of the above technical solution: a rectangular through groove is provided in the middle of the card plate 7, and the length and width of the rectangular through groove in the middle of the card plate 7 are both less than the length and width of the aerosol fire extinguishing bag 9 by 1cm. The rectangular through groove in the card plate 7 not only restricts the aerosol fire extinguishing bag 9, but also allows the ignition point generated when the battery protection board body 2 is short-circuited to melt the surface of the aerosol fire extinguishing bag 9.

[0026] As a further implementation of the above technical solution: the temperature sensor 10 is electrically connected to the controller 11, and the controller 11 is electrically connected to the alarm light 13. The battery compartment 12 supplies power to the controller 11 and the temperature sensor 10. The controller 11 controls the alarm light 13 to start only if the temperature sensor 10 detects that the temperature inside the box 1 exceeds 85°C. When the temperature sensor 10 detects that the temperature inside the box 1 exceeds 85°C and melts the surface of the aerosol fire extinguishing bag 9, the temperature sensor 10 controls the alarm light 13 to start through the controller 11, so that maintenance personnel can maintain the battery protection board body 2 as soon as possible.

[0027] The temperature sensor 10 mentioned in this specification is specifically model WZP003. However, this application does not make any improvements to the temperature sensor 10, and therefore will not describe it further.

[0028] Working principle:

[0029] When using this utility model, open the top cover 3 of the box body 1. The lock 4 in the middle of the front face of the box body 1 and the cover 3 will separate. Then, take out the aerosol fire extinguishing pack 9 for use. The maintenance personnel hook two fingers onto the pull rings 15 located on the left and right sides of the hollow shell 5 and pull upwards. The pull rings 15 drive the sliding rod 14 at the bottom to slide towards the top of the hollow block 6. The tension spring 16 at the bottom of the pull rings 15 deforms. At this time, after the lower outer side of the sliding rod 14 disengages from the inside of the insert block 8, the maintenance personnel pinch the clip with their other hand. Pull plate 7 forward, causing the insert block 8 to move outward, separating plate 7 from hollow shell 5. Put down plate 7 and pick up aerosol fire extinguisher 9, placing it according to the shape of the inner side of hollow shell 5. After placement, pick up plate 7 again and re-fix it to the front end of hollow shell 5. Insert blocks 8 located at both ends of plate 7 are reinserted into hollow block 6. After insert blocks 8 are fully inserted into hollow block 6, release the upward-pulling fingers. Sliding rod 14, restrained by tension spring 16, moves... The through hole inside the insert 8 slides, at which point the clip 7 is fixed to the front end of the hollow shell 5 and cannot be detached. Operate the remaining aerosol fire extinguishing pack 9 as described above. When all the fire extinguishing packs are installed inside the hollow shell 5, flip the lid 3 downwards to close the box 1 for use. When the battery protection board body 2 inside the box 1 ignites due to a short circuit, the temperature of the ignition point will instantly exceed 85°C. At this time, the aerosol fire extinguishing pack 9 is directly above the battery protection board body 2, and the distance between the two is relatively close. Therefore, after the ignition point appears, the surface of the aerosol fire extinguishing pack 9 will be melted by the ignition point, allowing the aerosol inside the aerosol fire extinguishing pack 9 to specifically cover the ignition point. At the same time, a temperature sensor 10 is set on the right side of the inner side of the lid 3. When the temperature sensor 10 detects that the temperature inside the box 1 exceeds 85°C and melts the surface of the aerosol fire extinguishing pack 9, the temperature sensor 10 controls the alarm light 13 to be activated through the controller 11, allowing maintenance personnel to maintain the battery protection board body 2 as soon as possible.

[0030] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A battery protection board with short-circuit protection function, comprising a housing (1), characterized in that: The inner side of the box body (1) is provided with a battery protection board body (2). The rear end face of the box body (1) is rotatably connected to a box cover (3). The front face of the box body (1) and the box cover (3) are fixedly connected with a latch (4). The inner side of the box cover (3) is fixedly connected with a hollow shell (5). The left and right end faces of the hollow shell (5) are fixedly connected with a hollow block (6). The hollow block (6) is slidably connected with an insert (8). The front top of the inner end face of the insert (8) is fixedly connected with a card plate (7). An aerosol fire extinguishing device is placed inside the hollow shell (5). Package (9), the hollow block (6) is slidably connected to the upper part of the interior of the package (9), a pull ring (15) is fixedly connected to the top of the pull ring (14), a tension spring (16) is fixedly connected to the lower outer side of the pull ring (15), a temperature sensor (10) is fixedly connected to the right side of the inner side of the box cover (3), a controller (11) is fixedly connected to the middle of the top right side of the surface of the box cover (3), a battery compartment (12) is fixedly connected to the top right side of the surface of the box cover (3), and an alarm light (13) is fixedly connected to the right side of the surface of the box cover (3).

2. A battery protection board with short-circuit protection function according to claim 1, characterized in that: The rear end face of the card plate (7) is in contact with the front end face of the hollow shell (5). The rear interior of the card plate (7) is slidably connected to the outer side below the sliding rod (14). The inner side of the tension spring (16) is slidably connected to the outer side above the sliding rod (14). The end of the tension spring (16) away from the pull ring (15) is fixedly connected to the top of the hollow block (6).

3. A battery protection board with short-circuit protection function according to claim 1, characterized in that: The number of hollow shells (5) is 4 sets, and the hollow shells (5) are evenly distributed horizontally from the left top to the right side inside the box cover (3). The temperature sensor (10) is located at the lower right side of the hollow shell (5) inside the right top of the box cover (3).

4. A battery protection board with short-circuit protection function according to claim 1, characterized in that: The hollow shell (5) has a groove inside, and the shape and depth of the groove inside the hollow shell (5) are matched with the overall shape and thickness of the aerosol fire extinguishing bag (9). The surface melting point of the aerosol fire extinguishing bag (9) is 85°C.

5. A battery protection board with short-circuit protection function according to claim 1, characterized in that: The hollow block (6) has a slot from front to back inside, and the longitudinal cross-sectional shape of the slot matches the longitudinal cross-sectional shape of the insert (8). The insert (8) has a through hole from top to bottom on the rear side inside, and the diameter of the through hole matches the diameter of the bottom cross-section of the sliding rod (14).

6. A battery protection board with short-circuit protection function according to claim 1, characterized in that: The card plate (7) has a rectangular through slot in the middle, and the length and width of the rectangular through slot in the middle of the card plate (7) are both less than the length and width of the aerosol fire extinguishing bag (9) by 1 cm.

7. A battery protection board with short-circuit protection function according to claim 1, characterized in that: The temperature sensor (10) is electrically connected to the controller (11), and the controller (11) is electrically connected to the alarm light (13). The battery compartment (12) supplies power to the controller (11) and the temperature sensor (10). The controller (11) controls the alarm light (13) to start on the premise that the temperature sensor (10) monitors the temperature inside the box (1) to be higher than 85°C.

Images