A high protection level lithium battery BMS protection board

Abstract

The invention discloses a lithium battery BMS protection board with a high protection level, comprising an integrated board and a heat dissipation module; the integrated board is coated with an antistatic coating; the heat dissipation module comprises a heat dissipation frame, and a first air chamber is formed between the heat dissipation frame and the integrated board; the first air chamber is provided with a first air inlet and a first air outlet; the heat dissipation frame is provided with an air pumping window; the air pumping window is provided with a glass layer; the heat dissipation frame is provided with an air pumping assembly; the heat dissipation frame is provided with a cleaning assembly; the air pumping assembly comprises a PTFE piston plate; the peripheral wall of the PTFE piston plate is sealed and abutted against the glass layer, and both sides of the PTFE piston plate are provided with inclined driving guide holes; the cleaning assembly comprises a cleaning slide seat made of conductive material, a conductive plate telescopically arranged on the cleaning slide seat, and a brush head arranged on the cleaning slide seat; both ends of the conductive plate are movably embedded in the driving guide holes; the integrated board is cleaned while heat dissipation is achieved, so as to effectively improve the heat dissipation effect and operation stability of the protection board, and enhance the reliability and service life of the protection board.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium batteries, and in particular to a lithium battery BMS protection board with a high protection level. Background Art

[0002] In the field of lithium battery management system (BMS), the protection board is a key component to ensure the safe operation of the battery. As electronic devices develop towards high integration and high performance, the protection level and stability requirements for lithium batteries are also increasing.

[0003] The heat dissipation design of the existing protection plate is difficult to adapt to temperature fluctuations, which can easily lead to uneven heat dissipation and thermal runaway; at the same time, dust easily accumulates on the surface of the protection plate, affecting the heat dissipation effect and stability.

[0004] Although hydrophobic coatings and heat sinks can partially solve these problems, their durability and dynamic adaptability are insufficient to meet the needs of efficient heat dissipation and long-term self-cleaning. Therefore, there is an urgent need to provide a protective plate that can improve heat dissipation performance and has self-cleaning capabilities to improve the reliability and service life of the protective plate. Summary of the invention

[0005] The purpose of the present invention is to overcome the above-mentioned shortcomings and provide a lithium battery BMS protection board with a high protection level, which can achieve heat dissipation and clean the integrated board at the same time, effectively improve the heat dissipation effect and operating stability of the protection board, thereby improving the reliability and service life of the protection board.

[0006] To achieve the above object, the specific scheme of the present invention is as follows:

[0007] A lithium battery BMS protection board with a high protection level, comprising an integrated board and a heat dissipation module; the surface of the integrated board is coated with an antistatic coating;

[0008] The heat dissipation module includes a heat dissipation frame, which is arranged on the top surface of the integrated board and forms a first air chamber between the integrated board; the first air chamber is provided with a first air inlet and a first air outlet at both ends of the heat dissipation frame; the heat dissipation frame is provided with a pumping air window connected to the heat dissipation; the peripheral wall of the pumping air window is provided with a glass layer; the heat dissipation frame is provided with a pumping air component in the pumping air window; the heat dissipation frame is provided with a cleaning component sliding in the first air chamber;

[0009] The pump air assembly includes a slidably arranged PTFE piston plate; the peripheral wall of the PTFE piston plate is in sealing contact with the glass layer, so that the PTFE piston plate generates electric charge by friction with the glass layer during the up and down sliding process; both sides of the PTFE piston plate are provided with driving guide holes; the driving guide holes are arranged to be inclined downward from the first air inlet to the first air outlet;

[0010] The cleaning assembly comprises a cleaning slide made of conductive material, a conductive plate telescopically arranged on the top of the cleaning slide and a brush head arranged at the bottom of the cleaning slide; both ends of the conductive plate are movably embedded in corresponding driving guide holes.

[0011] The present invention further comprises a pump air assembly which also includes a cylinder and a push rod; the cylinder is fixed on the heat dissipation frame; one end of the push rod is connected to the cylinder; and the other end of the push rod is connected to the PTFE piston plate.

[0012] The present invention further provides mounting bosses at the four corners of the pump air window of the heat dissipation frame; the cylinder is arranged on one of the mounting bosses; the other three mounting bosses are provided with guide columns; and the PTFE piston plate sliding sleeve is arranged on the outer wall of each guide column.

[0013] Furthermore, the cleaning component of the present invention also includes a telescopic platform arranged on the top of the cleaning slide; the telescopic platform is made of a conductive material; and the conductive plate is connected to the telescopic platform.

[0014] Furthermore, the present invention comprises a conductive plate which is slidably connected to the telescopic platform; and a first spring is connected between the conductive plate and the cleaning slide seat.

[0015] The present invention further forms a second air chamber between the cleaning slide, the telescopic table and the conductive plate; a second air inlet is provided at the bottom of the cleaning slide; a second exhaust port is provided on the side wall of the cleaning slide facing the first exhaust port; a control panel for controlling the opening and closing of the second air inlet is movably provided on the cleaning slide; a second spring is connected between the control panel and the cleaning slide; and a one-way valve is provided in the second exhaust port.

[0016] The present invention further comprises slide grooves on both sides of the heat dissipation frame; slide platforms are provided at both ends of the cleaning slide seat; the slide platforms are slidably connected in the slide grooves; friction pads are sleeved on the slide platforms; and the friction pads are in friction contact with the groove walls of the slide grooves.

[0017] The present invention further comprises a grounding terminal at one end of the heat dissipation frame close to the first exhaust port; when the cleaning slide slides close to the first exhaust port, the cleaning slide is in electrical contact with the grounding terminal.

[0018] Furthermore, the present invention provides extension strips at both ends of the bristle head; and extrusion bosses for cooperating with the extension strips are provided at the four corner positions of the heat dissipation frame.

[0019] The present invention further comprises a first valve plate hingedly connected to the heat dissipation frame at a position corresponding to the first air inlet for controlling the opening and closing of the first air inlet, and a second valve plate hingedly connected to the heat dissipation frame at a position corresponding to the first air outlet for controlling the opening and closing of the first air outlet.

[0020] The beneficial effects of the present invention are as follows: the present invention exchanges the airflow in the first air chamber by the up and down movement of the PTFE piston plate, and during the exchange process, the PTFE piston plate and the glass layer rub against each other to generate static electricity, and the charge in the PTFE piston plate is transmitted to the brush head through the conductive plate and the cleaning slide seat, thereby charging the dust on the surface of the integrated board, so that the cleaned dust can be discharged from the first air chamber together with the heat dissipation airflow, thereby achieving heat dissipation and cleaning of the integrated board at the same time, effectively improving the heat dissipation effect and operating stability of the protection plate, thereby improving the reliability and service life of the protection plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the present invention when the PTFE piston plate is not extended;

[0022] Figure 2 is a cross-sectional view of the present invention when the PTFE piston plate is not extended;

[0023] Figure 3 yes Figure 2 A local enlarged schematic diagram of the middle A;

[0024] Figure 4 It is a schematic diagram of the structure of the present invention when the PTFE piston plate is extended;

[0025] Figure 5 is a cross-sectional view of the present invention when the PTFE piston plate is extended;

[0026] Figure 6 yes Figure 5 A partial enlarged schematic diagram of point B in the middle;

[0027] Figure 7 is a cross-sectional view of the present invention from another perspective when the PTFE piston plate is extended;

[0028] Figure 8 It is a structural schematic diagram of the heat dissipation module of the present invention;

[0029] Fig. 9 is a structural schematic diagram of the heat dissipation module of the present invention from another perspective;

[0030] Fig.10 It is a structural schematic diagram of the heat dissipation frame of the present invention;

[0031] Fig.11 is a schematic diagram of the structure of the cleaning component of the present invention;

[0032] Fig.12 is a cross-sectional view of the cleaning assembly of the present invention;

[0033] Explanation of the reference numerals in the accompanying drawings: 1. integrated board; 21. heat dissipation frame; 211. pump air window; 212. glass layer; 213. mounting boss; 214. guide column; 215. extrusion boss; 221. cylinder; 222. push rod; 223. PTFE piston plate; 2231. drive guide hole; 231. cleaning slide; 232. conductive plate; 233. brush head; 2331. extension strip; 234. telescopic table; 235. first spring; 236. control board; 237. second spring; 238. one-way valve; 239. friction pad; 24. grounding terminal; 25. first valve plate; 26. second valve plate; 27. filter. DETAILED DESCRIPTION

[0034] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, but the implementation scope of the present invention is not limited thereto.

[0035] like Figures 1 to 12 As shown, a lithium battery BMS protection board with a high protection level described in this embodiment includes an integrated board 1 and a heat dissipation module; the surface of the integrated board 1 is coated with an antistatic coating, and the antistatic coating can effectively prevent static electricity from damaging the integrated board 1 during the process of charging dust;

[0036] The heat dissipation module includes a heat dissipation frame 21, which is arranged on the top surface of the integrated board 1 and forms a first air chamber between the integrated board 1; the first air chamber is provided with a first air inlet and a first air outlet at both ends of the heat dissipation frame 21; the heat dissipation frame 21 is provided with a pumping air window 211 connected to the heat dissipation; the peripheral wall of the pumping air window 211 is provided with a glass layer 212; the heat dissipation frame 21 is provided with a pumping air component in the pumping air window 211; the heat dissipation frame 21 is provided with a cleaning component that slides in the first air chamber;

[0037] The pump air assembly includes a slidably arranged PTFE piston plate 223; the peripheral wall of the PTFE piston plate 223 is sealed against the glass layer 212, so that the PTFE piston plate 223 generates electric charges by friction with the glass layer 212 during the up and down sliding process; both sides of the PTFE piston plate 223 are provided with driving guide holes 2231; the driving guide holes 2231 are arranged to be inclined downward from the first air inlet to the first air outlet;

[0038] The cleaning assembly includes a cleaning slide 231 made of conductive material, a conductive plate 232 telescopically arranged on the top of the cleaning slide 231 and a brush head 233 arranged at the bottom of the cleaning slide 231; both ends of the conductive plate 232 are movably embedded in the corresponding driving guide holes 2231.

[0039] Specifically, when the lithium battery BMS protection board of this embodiment is initially turned on, the cleaning component is located at one end of the heat dissipation frame 21 close to the first air inlet, such as Figures 1 to 3For the convenience of explaining the present embodiment, the following explanation is given by taking the case where the first air inlet is located at the left end of the heat dissipation frame 21 and the first exhaust port is located at the right end of the heat dissipation frame 21 as an example.

[0040] When the temperature of the integrated board 1 is too high and needs to be cooled, the air pump assembly causes the PTFE piston plate 223 to slide upward, thereby increasing the effective volume of the first air chamber, and the first air inlet is opened. External cold air enters the first air chamber through the first air inlet, absorbing the heat emitted by the integrated board 1 in the first air chamber space. During the upward movement, the PTFE piston plate 223 generates electric charge by friction with the glass layer 212, that is, the PTFE piston plate 223 generates static electricity. The PTFE piston plate 223 charges the bristle head 233 through the conduction of the conductive plate 232 and the cleaning slide 231. At the same time, since the conductive plate 232 is telescopically arranged, the PTFE piston plate 223 is driven The guide hole 2231 drives the conductive plate 232 to move upward relative to the cleaning slide 231. After the conductive plate 232 moves to its position, the PTFE piston plate 223 drives the cleaning component to slide from the first air inlet to the first exhaust port by driving the guide hole 2231 and the conductive plate 232, that is, the cleaning component moves from left to right, thereby cleaning the integrated board 1. During the cleaning process, the brush head 233 charges the surrounding dust, so that the dust is adsorbed around the brush head 233 and moves to the right with the brush head 233 until the cleaning component is completely moved to the right end of the heat dissipation frame 21. At this time, the PTFE piston plate 223 moves up to the top dead center position. Figures 4 to 7 As shown;

[0041] Then the pump air assembly moves the PTFE piston plate 223 downward. At this time, the effective volume of the first air chamber is reduced, and the first exhaust port is opened, so that the hot air in the first air chamber is discharged from the first exhaust port, thereby forming a heat dissipation airflow, which has a heat dissipation effect on the integrated board 1. During the downward movement of the PTFE piston plate 223, the PTFE piston plate 223 drives the conductive plate 232 to move downward relative to the cleaning slide 231 through the driving guide hole 2231. After the conductive plate 232 moves downward, the PTFE piston plate 223 cooperates with the driving guide hole 2231 and the conductive plate 232 to drive the cleaning assembly to slide from right to left, thereby cleaning the integrated board 1 again, and the dust on the brush head 233 and the cleaned dust are discharged from the first air chamber with the heat dissipation airflow at the same time, thereby achieving the cleaning effect of the integrated board 1, that is, when driving the airflow in the first air chamber, it effectively takes away the heat emitted by the integrated board 1 while also cleaning the integrated board 1.

[0042] In this embodiment, the airflow in the first air chamber is exchanged by the up and down movement of the PTFE piston plate 223. During the exchange process, the PTFE piston plate 223 and the glass layer 212 rub against each other to generate static electricity. The charge in the PTFE piston plate 223 is transmitted to the brush head 233 through the conductive plate 232 and the cleaning slide 231, thereby charging the dust on the surface of the integrated board 1 so that the cleaned dust can be discharged from the first air chamber together with the heat dissipation airflow, thereby achieving heat dissipation and cleaning of the integrated board 1 at the same time, effectively improving the heat dissipation effect and operating stability of the protection board, thereby improving the reliability and service life of the protection board.

[0043] like Figure 2 and Figure 5 As shown, in this embodiment, a filter screen 27 is provided on the outer side of the first air inlet to prevent external dust from entering the first air chamber.

[0044] like Fig. 9 As shown, the lithium battery BMS protection board of this embodiment, in some embodiments, the pump air assembly also includes a cylinder 221 and a push rod 222; the cylinder 221 is fixed on the heat dissipation frame 21; one end of the push rod 222 is connected to the cylinder 221; the other end of the push rod 222 is connected to the PTFE piston plate 223. Specifically, when the integrated board 1 needs to be cooled, the cylinder 221 pushes the push rod 222 to extend, and the push rod 222 pushes the PTFE piston plate 223 to move upward, thereby increasing the effective volume of the first air chamber and realizing the air intake process, so as to dissipate the heat of the integrated board 1 through the inhaled cold air; when the cylinder 221 cover drives the push rod 222 to retract, the PTFE piston plate 223 moves downward, so that the effective volume of the first air chamber is reduced, and the first exhaust port is opened to discharge the hot air in the first air chamber, so that in a reciprocating motion of the PTFE piston plate 223, the first air chamber completes the air intake and pumping processes to form a heat dissipation airflow; in this way, when the PTFE piston plate 223 continues to reciprocate, the first air chamber continuously forms a heat dissipation airflow, realizing continuous heat dissipation of the integrated board 1, thereby improving the heat dissipation effect.

[0045] like Fig. 9 and Fig.10 As shown, in the lithium battery BMS protection board of this embodiment, in some embodiments, the heat dissipation frame 21 is provided with mounting bosses 213 at the four corners of the pumping window 211; the cylinder 221 is provided on one of the mounting bosses 213; the other three mounting bosses 213 are provided with guide posts 214; and the PTFE piston plate 223 is slidably sleeved on the outer wall of each guide post 214. In this embodiment, the mounting boss 213 is provided to facilitate the installation of the cylinder 221, and the guide post 214 is provided to provide guidance and limit for the PTFE piston plate 223, thereby ensuring the sealing between the PTFE piston plate 223 and the glass layer 212, and the structural reliability is higher.

[0046] like Figure 3 , Figure 6 , Fig.11 and Fig.12 As shown, in the lithium battery BMS protection board of this embodiment, in some embodiments, the cleaning assembly further includes a telescopic platform 234 disposed on the top of the cleaning slide 231; the telescopic platform 234 is made of a conductive material; and the conductive plate 232 is connected to the telescopic platform 234. In this embodiment, by providing the telescopic platform 234, the telescopic movement of the conductive plate 232 is larger, so that the stroke of the PTFE piston plate 223 is also larger, so that the first air chamber can inhale more external cold air, thereby improving the heat dissipation effect.

[0047] like Figure 3 , Figure 6 and Fig.12 As shown, in the lithium battery BMS protection board of this embodiment, in some embodiments, the conductive plate 232 is slidably connected to the telescopic platform 234; a first spring 235 is connected between the conductive plate 232 and the cleaning slide 231. In this embodiment, the first spring 235 is provided to provide a reset function for the conductive plate 232.

[0048] like Figure 3 , Figure 6 and Fig.12 As shown, the lithium battery BMS protection board of this embodiment, in some embodiments, a second air chamber is formed between the cleaning slide 231, the telescopic table 234 and the conductive plate 232; a second air inlet is provided at the bottom of the cleaning slide 231; a second exhaust port is provided on the side wall of the cleaning slide 231 facing the first exhaust port; the cleaning slide 231 is movably provided with a control board 236 for controlling the opening and closing of the second air inlet; a second spring 237 is connected between the control board 236 and the cleaning slide 231; a one-way valve 238 is provided in the second exhaust port.

[0049] Specifically, when the PTFE piston plate 223 drives the conductive plate 232 to move upward, the effective volume of the second air chamber increases, so that the control plate 236 opens the second air inlet, and the hot air in the first air chamber enters the second air chamber, so that the dust on the brush head 233 is collected in the second air chamber; when the PTFE piston plate 223 slides downward, the effective volume of the second air chamber decreases. At this time, the control plate 236 closes the second air inlet, and the one-way valve 238 opens the second exhaust port, and the gas in the second air chamber is discharged from the second exhaust port. At the same time, the collected dust in the second air chamber is also discharged from the second air chamber with the airflow, and then discharged from the first exhaust port with the heat dissipation airflow.

[0050] In some embodiments of the lithium battery BMS protection plate of this embodiment, slide grooves are provided on both sides of the heat dissipation frame 21; slide tables are provided at both ends of the cleaning slide 231; the slide tables are slidably connected in the slide grooves; friction pads 239 are sleeved on the slide tables; and the friction pads 239 are in frictional contact with the groove wall of the slide groove. In this embodiment, the slide table cooperates with the slide groove to provide guidance and limit for the heat dissipation frame 21, so that the cleaning slide 231 slides more stably; at the same time, by arranging the friction pad 239 on the slide table to make frictional contact with the heat dissipation frame 21, when the PTFE piston plate 223 moves up and down, it is ensured that the PTFE piston plate 223 can first drive the conductive plate 232 to move up and down relative to the cleaning slide 231.

[0051] like Figures 7 to 9 As shown, in the lithium battery BMS protection board of this embodiment, in some embodiments, a grounding terminal 24 is provided at one end of the heat dissipation frame 21 close to the first exhaust port; when the cleaning slide 231 slides close to the first exhaust port, the cleaning slide 231 is in electrical contact with the grounding terminal 24. In this embodiment, by providing the grounding terminal 24, after the cleaning slide 231 slides from left to right to be in electrical contact with the grounding terminal 24, the static electricity on the bristle head 233 is eliminated, so that the dust cleaned is discharged from the first air chamber along with the heat dissipation airflow.

[0052] In this embodiment, Figures 7 to 9 As shown, a grounding terminal 24 is also provided at one end of the heat dissipation frame 21 close to the first air inlet, so that when the cleaning assembly slides to the leftmost end, the cleaning slide 231 is connected to the grounding terminal 24 to eliminate the static electricity on the brush head 233, thereby facilitating the collection of dust on the brush head 233 into the second air chamber, thereby effectively reducing the dust on the brush head 233 from falling onto the integrated board 1 again, thereby improving the cleaning effect.

[0053] like Figure 3 and Fig.10 As shown, in the lithium battery BMS protection board of this embodiment, in some embodiments, both ends of the bristle head 233 are provided with extension strips 2331; the four corner positions of the heat dissipation frame 21 are provided with extrusion bosses 215 for cooperating with the extension strips 2331. Specifically, when the bristle head 233 moves close to the first air inlet, the extension strip 2331 on the bristle head 233 abuts against the extrusion boss 215, and the extrusion boss 215 squeezes the bristle head 233 through the extension strip 2331 to swing, so that the bristle head 233 is in an inclined state, which is convenient for dust to move under the influence of airflow; when the bristle head 233 moves close to the first exhaust port, the extension strip 2331 on the bristle head 233 abuts against the extrusion boss 215, and the extrusion boss 215 squeezes the bristle head 233 through the extension strip 2331 to swing, so that the bristle head 233 is in an inclined state, which is convenient for dust to move under the influence of airflow and be discharged from the first exhaust port.

[0054] like Figure 2 , Figure 5 and Fig. 9 As shown, in the lithium battery BMS protection board of this embodiment, in some embodiments, the heat dissipation frame 21 is hinged with a first valve plate 25 for controlling the opening and closing of the first air inlet at a position corresponding to the first air inlet, and is hinged with a second valve plate 26 for controlling the opening and closing of the first exhaust port at a position corresponding to the first exhaust port. In this embodiment, the first valve plate 25 is provided to effectively control the opening and closing of the first air inlet, and the second valve plate 26 is provided to effectively control the opening and closing of the first exhaust port, thereby realizing the air intake and exhaust process of the first air chamber.

[0055] The above description is only a preferred embodiment of the present invention. Therefore, any equivalent changes or modifications made according to the structure, characteristics and principles described in the scope of the patent application of the present invention are included in the protection scope of the patent application of the present invention.

Claims

1. A lithium battery BMS protection board with a high protection level, characterized in that: It includes an integrated board and a heat dissipation module; the surface of the integrated board is coated with an antistatic coating; The heat dissipation module includes a heat dissipation frame, which is arranged on the top surface of the integrated board and forms a first air chamber between the integrated board; the first air chamber is provided with a first air inlet and a first air outlet at both ends of the heat dissipation frame; the heat dissipation frame is provided with a pumping air window connected to the heat dissipation; the peripheral wall of the pumping air window is provided with a glass layer; the heat dissipation frame is provided with a pumping air component in the pumping air window; the heat dissipation frame is provided with a cleaning component sliding in the first air chamber; The pump air assembly includes a slidably arranged PTFE piston plate; the peripheral wall of the PTFE piston plate is in sealing contact with the glass layer, so that the PTFE piston plate generates electric charge by friction with the glass layer during the up and down sliding process; both sides of the PTFE piston plate are provided with driving guide holes; the driving guide holes are arranged to be inclined downward from the first air inlet to the first air outlet; The cleaning assembly includes a cleaning slide made of conductive material, a conductive plate telescopically arranged on the top of the cleaning slide, and a brush head arranged at the bottom of the cleaning slide; both ends of the conductive plate are movably embedded in corresponding driving guide holes; The cleaning assembly also includes a telescopic table arranged on the top of the cleaning slide; the telescopic table is made of a conductive material; the conductive plate is connected to the telescopic table; The conductive plate is slidably connected to the telescopic table; a first spring is connected between the conductive plate and the cleaning slide seat; A second air chamber is formed between the cleaning slide, the telescopic table and the conductive plate; a second air inlet is provided at the bottom of the cleaning slide; a second exhaust port is provided on the side wall of the cleaning slide facing the first exhaust port; a control panel for controlling the opening and closing of the second air inlet is movably provided on the cleaning slide; a second spring is connected between the control panel and the cleaning slide; and a one-way valve is provided in the second exhaust port.

2. A lithium battery BMS protection board with a high protection level according to claim 1, characterized in that: The pump air assembly also includes a cylinder and a push rod; the cylinder is fixed on the heat dissipation frame; one end of the push rod is connected to the cylinder; and the other end of the push rod is connected to the PTFE piston plate.

3. A lithium battery BMS protection board with a high protection level according to claim 2, characterized in that: The heat dissipation frame is provided with mounting bosses at the four corners of the pump air window; the cylinder is arranged on one of the mounting bosses; the other three mounting bosses are provided with guide columns; the PTFE piston plate sliding sleeve is arranged on the outer wall of each guide column.

4. A lithium battery BMS protection board with a high protection level according to claim 1, characterized in that: Slide grooves are arranged on both sides of the heat dissipation frame; slide tables are arranged on both ends of the cleaning slide seat; the slide tables are slidably connected in the slide grooves; friction pads are sleeved on the slide tables; and the friction pads are in friction contact with the groove wall of the slide groove.

5. A lithium battery BMS protection board with a high protection level according to claim 1, characterized in that: A grounding terminal is provided at one end of the heat dissipation frame close to the first exhaust port; when the cleaning slide seat slides close to the first exhaust port, the cleaning slide seat is in electrical contact with the grounding terminal.

6. A lithium battery BMS protection board with a high protection level according to claim 1, characterized in that: Both ends of the bristle head are provided with extension strips; and the four corners of the heat dissipation frame are provided with extrusion bosses for matching with the extension strips.

7. A lithium battery BMS protection board with a high protection level according to claim 1, characterized in that: The heat dissipation frame is hinged with a first valve plate for controlling the opening and closing of the first air inlet at a position corresponding to the first air inlet, and is hinged with a second valve plate for controlling the opening and closing of the first air outlet at a position corresponding to the first air outlet.

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