Battery protection device

Abstract

The invention relates to the technical field of battery protection, and discloses a battery protection device which comprises an outer shell and a battery body installed in the outer shell, buffer assemblies are fixedly installed on the inner walls of the upper side and the lower side of the outer shell, and each buffer assembly comprises a buffer layer frame and an elastic connecting part; the two ends of each elastic connecting part are fixedly connected to the opposite outer walls of the two buffer layer frames correspondingly, energy dissipation structures are arranged on the surfaces of the elastic connecting parts, each buffer layer frame is composed of a plurality of buffer units arranged in a honeycomb shape, and the multiple buffer units are connected to form an integral buffer layer. A plurality of groups of auxiliary buffer mechanisms are further mounted in the outer shell, every two groups of auxiliary buffer mechanisms are uniformly distributed on the upper outer wall and the lower outer wall of the battery body, and the battery protection device disclosed by the invention realizes omnibearing and multi-layer buffer protection on the battery body through a unique buffer structure design and comprises the buffer assembly and the auxiliary buffer mechanisms.

Description

Technical Field

[0001] This application relates to the technical field of battery protection, and particularly to a battery protection device. Background Art

[0002] With the wide application of batteries in various fields, the safety of batteries has received increasing attention. During the use of batteries, various external impacts and vibrations are inevitably encountered. For example, electric vehicles encounter bumpy roads during driving, and power tools accidentally fall during use. These impacts and vibrations may damage the internal structure of the battery, affect the performance and service life of the battery, and even cause safety accidents such as battery short circuits, fires, and explosions.

[0003] Although existing battery protection devices also have some buffer structures to reduce the impact of external shocks on the battery, there are many deficiencies. For example, some buffer structures use simple foam materials or rubber gaskets, and their buffer effects are limited. When subjected to large impact forces, they cannot effectively absorb and disperse energy, resulting in the battery still being easily damaged. The designs of some buffer structures are not reasonable enough to protect the battery in all directions, and only have a certain buffer effect in certain specific directions. There are also some buffer structures whose buffer performance will significantly decline after being impacted multiple times and cannot continuously provide reliable protection for the battery. Therefore, a battery protection device is proposed to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to provide a battery protection device. Through a unique buffer structure design, it can effectively absorb and disperse energy when the battery is subjected to external impacts and vibrations, protect the internal structure of the battery in all directions, improve the safety and reliability of the battery, and at the same time have a lasting buffer performance.

[0005] A battery protection device provided by this application adopts the following technical solutions:

[0006] A battery protection device includes an outer shell and a battery body installed inside the outer shell. Buffer components are fixedly installed on the inner walls of the upper and lower sides of the outer shell. The buffer components include a buffer layer frame and elastic connection members. The two ends of multiple elastic connection members are respectively fixedly connected to the opposite outer walls of the two buffer layer frames, and an energy-consuming structure is arranged on the surface of the elastic connection members. The buffer layer frame is composed of multiple buffer units arranged in a honeycomb shape, and the multiple buffer units are connected to form an integral buffer layer.

[0007] Multiple groups of auxiliary buffer mechanisms are also installed inside the outer shell. Every two groups of auxiliary buffer mechanisms are evenly distributed on the upper and lower outer walls of the battery body to further improve the buffer performance.

[0008] An electrical connection component is provided on the outer wall of the back of the outer casing. The electrical connection component is electrically connected to the battery body. A plurality of conductive plugs are inserted into the interior of the electrical connection component. A quick-release device is installed on the outer wall of the outer casing for quickly disconnecting the connection between the plurality of conductive plugs and the electrical connection component.

[0009] A limiting mechanism is also installed on the outer wall of the top of the outer casing for restricting the quick-release device from quickly disconnecting the insertion of the conductive plug and the electrical connection component.

[0010] Preferably, the auxiliary buffer mechanism includes two fixed seats fixedly connected to the inner wall of the outer casing. Guide rods are fixedly connected to the opposite outer walls of the two fixed seats. Two sliding blocks are slidably connected to the outer walls of the guide rods. Connecting rods are rotatably connected to the outer walls of the two sliding blocks. The opposite ends of the two connecting rods away from the sliding blocks are commonly hinged to a buffer abutting block.

[0011] Preferably, the auxiliary buffer mechanism further includes elastic reset components and a hydraulic damper. A plurality of elastic reset components are sleeved on the outer walls of the guide rods. One end of each elastic reset component is fixedly connected to the outer wall of the sliding block, and the other end is fixedly connected to the outer wall of the fixed seat. The hydraulic damper is located between the fixed seat and the sliding block. One end of the hydraulic damper is fixedly connected to the outer wall of the fixed seat, and the other end is fixedly connected to the outer wall of the sliding block.

[0012] Preferably, protective pads are commonly fixedly connected to the opposite outer walls of every two buffer abutting blocks. The two protective pads are in contact with the upper and lower outer walls of the battery body. The opposite outer walls of the two groups of buffer components are abutted against the outer walls opposite to the two protective pads.

[0013] Preferably, the quick-release device includes a sliding rod, a connecting block, a return spring, a clamping block, and a movable clip. The clamping block and the movable clip are symmetrically arranged and clamp a plurality of conductive plugs therebetween. The two sliding rods are slidably connected to the outer wall of the back of the outer casing. One end of each of the two sliding rods penetrates the outer casing and is fixedly connected to the two connecting blocks. The return spring is sleeved on the outer wall of the sliding rod. One end of the return spring is fixedly connected to the outer wall of the back of the outer casing, and the other end is fixedly connected to the outer wall of the connecting block. Two limiting columns are welded to the outer wall of the back of the outer casing. The two connecting blocks are slidably connected to the outer walls of the two limiting columns.

[0014] Preferably, both ends of the clamping block are welded to the opposite outer walls of the two connecting blocks. Both ends of the movable clip are slidably connected to the opposite outer walls of the two connecting blocks. Fastening screws are provided on the outer walls of both ends of the movable clip. The bottom ends of the fastening screws are threadedly connected to the inner walls of the clamping blocks.

[0015] Preferably, the limiting mechanism includes a plurality of limiting rods slidably connected to the outer wall of the top of the outer casing. The bottom ends of every two adjacent limiting rods penetrate through the outer casing and are fixedly connected with a limiting plate. The bottom end of the limiting plate is fixedly connected with a limiting block. A limiting spring is also sleeved on the outer wall of the limiting rod. One end of the limiting spring is fixedly connected to the inner wall of the top of the outer casing, and the other end thereof is fixedly connected to the outer wall of the limiting plate. The top ends of the plurality of limiting rods are fixedly connected with a limiting pressure plate, and the limiting pressure plate is located above the outer casing.

[0016] Preferably, two limiting grooves are formed in the outer wall of the sliding rod, and the bottom end of the limiting block is adaptively clamped with the limiting groove. A connecting ring is fixedly connected to the bottom outer wall of the two fixed seats. The two sliding rods are respectively slidably connected to the inner wall of the connecting ring. A triggering ejector rod is fixedly connected to the bottom outer wall of the two sliding blocks, and the two triggering ejector rods respectively correspond to the ends of the two sliding rods away from the connecting block.

[0017] Preferably, a plurality of telescopic columns are fixedly connected to the inner walls of the upper and lower sides of the outer casing. The ends of the plurality of telescopic columns away from the inner wall of the outer casing are respectively fixedly connected to the outer walls of the opposite sides of the two protection pads. The plurality of telescopic columns are evenly distributed at the four corner edges of the protection pads.

[0018] Preferably, a sealing and buffering layer is provided on the inner walls of the four sides of the outer casing, and the sealing and buffering layer is attached to the outer walls of the four sides of the battery body.

[0019] In summary, the present application includes the following beneficial technical effects:

[0020] 1. The battery protection device of the present invention realizes all-round and multi-level buffer protection for the battery body through a unique buffer structure design, including a buffer assembly and an auxiliary buffer mechanism. In the buffer assembly, the honeycomb-arranged buffer units are made of high-elastic rubber materials, which can elastically deform in all directions, effectively absorb and disperse impact energy. The elastic connection components and the energy-consuming structures on their surfaces further enhance the energy dissipation effect. The synergistic effect of the elastic reset components, hydraulic dampers and connecting rods in the auxiliary buffer mechanism can respond in time during a collision, further buffer the impact force, reduce the impact received by the battery body, greatly improve the safety of the battery when it is collided, effectively protect the internal structure of the battery, and extend the service life of the battery;

[0021] 2. The design of the electrical connection component and the conductive plug ensures a stable electrical connection between the battery body and external devices. At the same time, the setting of the quick-release device and the limiting mechanism provides additional protection for the electrical connection. In the normal working state, the limiting mechanism restricts the action of the quick-release device to ensure the reliable connection between the conductive plug and the electrical connection component. When the device is subjected to a great impact, the limiting mechanism is triggered by the auxiliary buffer mechanism to release the restriction on the quick-release device, enabling it to quickly cut off the connection between the conductive plug and the electrical connection component, avoiding potential safety hazards such as electrical short circuits caused by collisions, and providing reliable electrical safety protection for the battery and related devices;

[0022] 3. The linkage trigger mechanism between the limiting mechanism and the auxiliary buffer mechanism is ingeniously designed. Only when the device is subjected to a great impact, the sliding block in the auxiliary buffer mechanism drives the trigger ejector rod to move, thereby triggering the limiting mechanism to release the restriction on the quick-release device. This intelligent trigger method can accurately judge the severity of the collision, maintain the stability of the electrical connection when unnecessary, and cut off the connection in a timely manner when facing a serious collision threat, which not only ensures the convenience during normal use but also improves the ability to handle emergencies, enhancing the practicality and reliability of the battery protection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is the overall schematic diagram of the application embodiment;

[0024] Figure 2 is the three-dimensional schematic diagram of the application embodiment;

[0025] Figure 3 is the first partial cross-sectional view of the application embodiment;

[0026] Figure 4 is Figure 3 the enlarged schematic diagram of the structure at A in

[0027] Figure 5 is the second partial cross-sectional view of the application embodiment;

[0028] Figure 6 is Figure 5 the enlarged schematic diagram of the structure at B in

[0029] Figure 7 is the third partial cross-sectional view of the application embodiment.

[0030] Description of reference numerals: 1. Outer housing; 2. Battery body; 3. Buffer assembly; 31. Buffer layer frame; 32. Buffer unit; 33. Elastic connection member; 331. Energy dissipation structure; 4. Protective backing plate; 5. Auxiliary buffer mechanism; 51. Buffer abutting block; 52. Fixed seat; 53. Guide rod; 54. Elastic reset member; 55. Hydraulic damper; 56. Link; 57. Sliding block; 571. Trigger ejector rod; 6. Electrical connection assembly; 7. Conductive plug-in; 8. Quick release device; 81. Connecting ring; 82. Sliding rod; 83. Tightening screw; 84. Limit card slot; 85. Connecting block; 86. Return spring; 87. Clamping block; 88. Movable clip; 9. Limit mechanism; 91. Limit pressing plate; 92. Limit rod; 93. Limit spring; 94. Limit plate; 95. Limit block; 10. Telescopic column; 11. Sealing buffer layer; 12. Limit column. Detailed implementation manners

[0031] The following further describes the present application in conjunction with the attached Figures 1-7 drawings for a more detailed explanation.

[0032] An embodiment of the present application discloses a battery protection device. Referring to Figures 1-7 , a battery protection device includes an outer housing 1 and a battery body 2 installed inside the outer housing 1. The outer housing 1 is made of a high-strength alloy material, such as aluminum alloy. Buffer assemblies 3 are fixedly installed on the inner walls of the upper and lower sides of the outer housing 1. The buffer assembly 3 includes a buffer layer frame 31 and an elastic connection member 33. The two ends of a plurality of elastic connection members 33 are respectively fixedly connected to the opposite outer walls of the two buffer layer frames 31, and an energy dissipation structure 331 is provided on the surface of the elastic connection member 33. The buffer layer frame 31 is composed of a plurality of buffer units 32 arranged in a honeycomb shape. The plurality of buffer units 32 are interconnected to form an integral buffer layer. The energy dissipation structure 331 is a spiral groove, which is made by a machining process and can increase the deformation path of the buffer unit 32 during the plastic deformation process, thereby improving the energy dissipation efficiency. When subjected to an impact, the buffer unit 32 will undergo plastic deformation along the direction of the energy dissipation structure 331, converting the impact energy into its own deformation energy, thereby further dissipating energy;

[0033] A plurality of groups of auxiliary buffer mechanisms 5 are also installed inside the outer housing 1. Every two groups of auxiliary buffer mechanisms 5 are evenly distributed on the upper and lower outer walls of the battery body 2 to further improve the buffer performance;

[0034] An electrical connection assembly 6 is provided on the outer wall of the back of the outer housing 1. The electrical connection assembly 6 is electrically connected to the battery body 2. A plurality of conductive plug-ins 7 are inserted into the electrical connection assembly 6. A quick release device 8 is installed on the outer wall of the outer housing 1 for quickly disconnecting the connection between the plurality of conductive plug-ins 7 and the electrical connection assembly 6;

[0035] A limiting mechanism 9 is also installed on the top outer wall of the outer housing 1 to limit the quick release of the conductive plug-in 7 from the electrical connection assembly 6 by the quick release device 8. When the device is subjected to a great impact, the limiting mechanism 9 is triggered by the auxiliary buffer mechanism 5 to release the restriction on the quick release device 8, so that the quick release device 8 can be triggered to quickly release the connection between the conductive plug-in 7 and the electrical connection assembly 6.

[0036] The auxiliary buffer mechanism 5 includes two fixed seats 52 fixedly connected to the inner wall of the outer housing 1. Guide rods 53 are fixedly connected to the opposite outer walls of the two fixed seats 52. Two sliding blocks 57 are slidably connected to the outer walls of the guide rods 53. Link rods 56 are rotatably connected to the outer walls of the two sliding blocks 57. The opposite ends of the two link rods 56 away from the sliding blocks 57 are jointly hinged to a buffer abutting block 51.

[0037] The auxiliary buffer mechanism 5 further includes elastic reset components 54 and hydraulic dampers 55. A plurality of elastic reset components 54 are sleeved on the outer walls of the guide rods 53. One end of each is fixedly connected to the outer wall of the sliding block 57, and the other end is fixedly connected to the outer wall of the fixed seat 52. The hydraulic dampers 55 are located between the fixed seats 52 and the sliding blocks 57. One end of each is fixedly connected to the outer wall of the fixed seat 52, and the other end is fixedly connected to the outer wall of the sliding block 57.

[0038] Protective backing plates 4 are jointly fixedly connected to the opposite outer walls of every two buffer abutting blocks 51. The two protective backing plates 4 are in contact with the upper and lower outer walls of the battery body 2. The opposite outer walls of the two groups of buffer components 3 are abutted against the opposite outer walls of the two protective backing plates 4.

[0039] The quick release device 8 includes sliding rods 82, connection blocks 85, return springs 86, clamping blocks 87 and movable clip pieces 88. The clamping blocks 87 and the movable clip pieces 88 are symmetrically arranged and clamp a plurality of conductive plug-ins 7. Two sliding rods 82 are slidably connected to the back outer wall of the outer housing 1. One end of each of the two sliding rods 82 penetrates the outer housing 1 and is fixedly connected to the two connection blocks 85. The return springs 86 are sleeved on the outer walls of the sliding rods 82. One end of each is fixedly connected to the back outer wall of the outer housing 1, and the other end is fixedly connected to the outer wall of the connection block 85. Two limit posts 12 are welded to the back outer wall of the outer housing 1. The two connection blocks 85 are slidably connected to the outer walls of the two limit posts 12.

[0040] Both ends of the clamping block 87 are welded to the opposite outer walls of the two connection blocks 85. Both ends of the movable clip piece 88 are slidably connected to the opposite outer walls of the two connection blocks 85. Fastening screws 83 are arranged on the outer walls of both ends of the movable clip piece 88. The bottom ends of the fastening screws 83 are threadedly connected to the inner walls of the clamping blocks 87.

[0041] The limiting mechanism 9 includes a plurality of limiting rods 92 slidably connected to the outer wall of the top of the outer housing 1. The bottom ends of every two adjacent limiting rods 92 penetrate through the outer housing 1 and are fixedly connected to a limiting plate 94. The bottom end of the limiting plate 94 is fixedly connected to a limiting block 95. A limiting spring 93 is also sleeved on the outer wall of the limiting rod 92. One end of the limiting spring 93 is fixedly connected to the inner wall of the top of the outer housing 1, and the other end thereof is fixedly connected to the outer wall of the limiting plate 94. The top ends of the plurality of limiting rods 92 are fixedly connected to a limiting pressing plate 91, and the limiting pressing plate 91 is located above the outer housing 1.

[0042] Two limiting slots 84 are formed in the outer wall of the sliding rod 82. The bottom end of the limiting block 95 is adaptively clamped with the limiting slot 84. A connecting ring 81 is fixedly connected to the outer wall of the bottom of the two fixing seats 52. The two sliding rods 82 are respectively slidably connected to the inner wall of the connecting ring 81. A trigger ejector rod 571 is fixedly connected to the outer wall of the bottom of the two sliding blocks 57. The two trigger ejector rods 571 respectively correspond to the ends of the two sliding rods 82 far away from the connecting block 85.

[0043] A plurality of telescopic columns 10 are fixedly connected to the inner walls of the upper and lower sides of the outer housing 1. The ends of the plurality of telescopic columns 10 far away from the inner wall of the outer housing 1 are respectively fixedly connected to the outer walls of the opposite sides of the two protection pads 4. The plurality of telescopic columns 10 are uniformly distributed at the four corner edges of the protection pad 4.

[0044] Sealing and buffering layers 11 are arranged on the inner walls of the four sides of the outer housing 1. The sealing and buffering layers 11 are attached to the outer walls of the four sides of the battery body 2. The sealing and buffering layers 11 are made of rubber material with a thickness of 5 mm and are pasted by strong glue.

[0045] The implementation principle of a battery protection device according to an embodiment of the present application is as follows: During normal use, the battery body 2 supplies power to an external device through the electrical connection assembly 6 and the conductive plug-in 7. The buffer assembly 3 and the auxiliary buffer mechanism 5 are in an initial state. The buffer unit 32 and the elastic connection member 33 of the buffer assembly 3 maintain a static state within the elastic deformation range. The elastic reset member 54 and the hydraulic damper 55 of the auxiliary buffer mechanism 5 are also in a natural state. The buffer abutting block 51 is closely attached to the protection pad 4 to provide stable support for the battery body 2. The limiting block 95 of the limiting mechanism 9 is inserted into the limiting slot 84 of the sliding rod 82 to limit the sliding of the quick release device 8 and ensure the stable connection between the conductive plug-in 7 and the electrical connection assembly 6;

[0046] When the battery protection device is slightly impacted, the outer casing 1 first bears the external impact force. The sealing buffer layer 11 initially buffers the impact force transmitted by the outer casing 1, reducing the direct impact on the battery body 2. The buffer unit 32 of the buffer assembly 3 undergoes elastic deformation, absorbing part of the impact energy. The elastic connection member 33 also produces a certain amount of tensile or compressive deformation, and the energy dissipation structure 331 on its surface further increases energy dissipation, reducing the impact on the battery. In the auxiliary buffer mechanism 5, the buffer abutting block 51 pushes the connecting rod 56 under the action of the impact force, causing the sliding block 57 to slide on the guide rod 53. The elastic reset member 54 is compressed or stretched, and the hydraulic damper 55 provides a damping force to slow down the sliding speed of the sliding block 57, further absorbing and dispersing the impact energy to protect the battery body 2 from damage. Since the impact force is small, the limit block 95 of the limit mechanism 9 remains stuck in the limit card slot 84, and the quick release device 8 is not triggered, and the conductive plug-in 7 remains connected to the electrical connection assembly 6;

[0047] When the battery protection device is severely impacted, the impact force is transmitted to the buffer assembly 3 and the auxiliary buffer mechanism 5 through the outer casing 1. The buffer assembly 3 and the auxiliary buffer mechanism 5 undergo large deformations under the strong impact force. The buffer abutting block 51 pushes the connecting rod 56, causing the sliding block 57 to slide rapidly on the guide rod 53. At this time, the trigger push rod 571 at the bottom of the sliding block 57 moves and abuts against the sliding rod 82. The movement of the sliding rod 82 drives the two limit card slots 84 to move. Since the mating surface between the limit card slot 84 and the limit plate 94 is an inclined surface, the limit card slot 84 can be disengaged from the limit block 95. The limit rod 92 and the limit plate 94 move upward, and the limit spring 93 is compressed, releasing the restriction on the quick release device 8. Under the action of the return spring 86, the sliding rod 82 drives the connecting block 85, the clamping block 87, and the movable clip 88 to slide out of the outer casing 1, and then through the clamping of the clamping block 87 and the movable clip 88 on the conductive plug-in 7, multiple conductive plug-ins 7 are pushed to separate from the electrical connection assembly 6, cutting off the connection between the battery body 2 and the external circuit, avoiding safety accidents such as battery short circuits and fires caused by collisions, and ensuring the safety of the battery and surrounding equipment;

[0048] After the collision ends, under the action of the elastic reset member 54 and the limit spring 93, the auxiliary buffer mechanism 5 and the limit mechanism 9 return to the initial state, and the battery protection device can be inspected and maintained again. If necessary, the conductive plug-in 7 can be reinserted, the movable clip 88 is slid upward, and the fastening screw 83 is screwed into the clamping block 87 to fix the movable clip 88 and the clamping block 87, so that the movable clip 88 and the clamping block 87 clamp multiple conductive plug-ins 7 again. Then, the connecting block 85 is pushed inward to slide the sliding rod 82 back to its original position, and then the limit rod 92 of the limit mechanism 9 is re-engaged with the limit card slot 84, so that the limit mechanism 9 restricts the quick release device 8.

[0049] The above are all preferred embodiments of the present application, and do not limit the protection scope of the present application. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A battery protection device, characterized in that: The invention comprises an outer shell (1) and a battery body (2) installed inside the outer shell (1), wherein a buffer assembly (3) is fixedly installed on the inner walls of the upper and lower sides of the outer shell (1), wherein the buffer assembly (3) comprises a buffer layer frame (31) and an elastic connection component (33), wherein two ends of a plurality of the elastic connection components (33) are respectively fixedly connected to the opposite outer walls of two buffer layer frames (31), and an energy dissipation structure (331) is arranged on the surface of the elastic connection component (33), and the buffer layer frame (31) is composed of a plurality of buffer units (32) arranged in a honeycomb shape, and the plurality of buffer units (32) are interconnected to form an integral buffer layer; A plurality of groups of auxiliary buffer mechanisms (5) are also installed inside the outer shell (1), and each two groups of the auxiliary buffer mechanisms (5) are evenly distributed on the upper and lower outer walls of the battery body (2) to further improve the buffer performance; The outer wall of the outer shell (1) is provided with an electrical connection assembly (6), the electrical connection assembly (6) is electrically connected to the battery body (2), a plurality of conductive plug-ins (7) are inserted into the interior of the electrical connection assembly (6), and a quick release device (8) is installed on the outer wall of the outer shell (1) for quickly releasing the connection between the plurality of conductive plug-ins (7) and the electrical connection assembly (6); A limiting mechanism (9) is also installed on the top outer wall of the outer shell (1) for limiting the quick release device (8) from quickly releasing the connection between the conductive plug-in (7) and the electrical connection assembly (6).

2. A battery protection device according to claim 1, characterized in that: The auxiliary buffer mechanism (5) comprises two fixed seats (52) fixedly connected to the inner wall of the outer shell (1); the outer walls opposite to the two fixed seats (52) are fixedly connected to guide rods (53); the outer walls of the guide rods (53) are slidably connected to two sliding blocks (57); the outer walls of the two sliding blocks (57) are both rotatably connected to connecting rods (56); and the ends of the two connecting rods (56) away from the sliding blocks (57) are jointly hinged to a buffer abutment block (51).

3. A battery protection device according to claim 2, characterized in that: The auxiliary buffer mechanism (5) further comprises an elastic reset component (54) and a hydraulic damper (55); a plurality of the elastic reset components (54) are sleeved on the outer wall of the guide rod (53); one end of the elastic reset components (54) is fixedly connected to the outer wall of the sliding block (57); and the other end is fixedly connected to the outer wall of the fixed seat (52); and the hydraulic damper (55) is located between the fixed seat (52) and the sliding block (57); one end of the hydraulic damper (55) is fixedly connected to the outer wall of the fixed seat (52); and the other end is fixedly connected to the outer wall of the sliding block (57).

4. A battery protection device according to claim 3, characterized in that: The opposing outer walls of each two buffer abutment blocks (51) are fixedly connected with a protective pad (4); the two protective pads (4) fit the upper and lower outer walls of the battery body (2); and the opposing outer walls of the two groups of buffer assemblies (3) abut against the opposite outer walls of the two protective pads (4).

5. A battery protection device according to claim 1, characterized in that: The quick release device (8) comprises a sliding rod (82), a connecting block (85), a reset spring (86), a clamping block (87) and a movable clamping piece (88); the clamping block (87) and the movable clamping piece (88) are symmetrically arranged and mutually clamp a plurality of conductive plug-ins (7); the two sliding rods (82) are slidably connected to the back outer wall of the outer shell (1); one end of the two sliding rods (82) penetrates the outer shell (1) and is fixedly connected to the two connecting blocks (85); the reset spring (86) is sleeved on the outer wall of the sliding rod (82); one end of the reset spring (86) is fixedly connected to the back outer wall of the outer shell (1) and the other end is fixedly connected to the outer wall of the connecting block (85); two limit columns (12) are welded to the back outer wall of the outer shell (1); the two connecting blocks (85) are slidably connected to the outer walls of the two limit columns (12).

6. A battery protection device according to claim 5, characterized in that: The two ends of the clamping block (87) are welded to the opposite outer walls of the two connecting blocks (85), the two ends of the movable clamping piece (88) are slidably connected to the opposite outer walls of the two connecting blocks (85), and the outer walls at both ends of the movable clamping piece (88) are provided with fastening screws (83), and the bottom end of the fastening screws (83) is threadedly connected to the inner wall of the clamping block (87).

7. A battery protection device according to claim 6, characterized in that: The limiting mechanism (9) comprises a plurality of limiting rods (92) slidably connected to the top outer wall of the outer shell (1); the bottom ends of every two adjacent limiting rods (92) penetrate the outer shell (1) and are fixedly connected to a limiting plate (94); the bottom end of the limiting plate (94) is fixedly connected to a limiting clamping block (95); the outer wall of the limiting rod (92) is also sleeved with a limiting spring (93); one end of the limiting spring (93) is fixedly connected to the top inner wall of the outer shell (1) and the other end is fixedly connected to the outer wall of the limiting plate (94); the top ends of the plurality of limiting rods (92) are fixedly connected to a limiting pressure plate (91); and the limiting pressure plate (91) is located above the outer shell (1).

8. A battery protection device according to claim 7, characterized in that: The outer wall of the sliding rod (82) is provided with two limit slots (84), the bottom end of the limit block (95) is adapted to be engaged with the limit slots (84), the bottom outer walls of the two fixing seats (52) are fixedly connected with a connecting ring (81), the two sliding rods (82) are slidably connected to the inner wall of the connecting ring (81), the bottom outer walls of the two sliding blocks (57) are fixedly connected with a triggering push rod (571), and the two triggering push rods (571) respectively correspond to one end of the two sliding rods (82) away from the connecting block (85).

9. A battery protection device according to claim 8, characterized in that: A plurality of telescopic columns (10) are fixedly connected to the inner walls on the upper and lower sides of the outer shell (1); one end of the plurality of telescopic columns (10) away from the inner wall of the outer shell (1) is fixedly connected to the outer walls on the opposite sides of the two protection pads (4); and the plurality of telescopic columns (10) are evenly distributed at the four corner edge positions of the protection pads (4).

10. A battery protection device according to claim 1, characterized in that: The inner walls of the outer shell (1) are all provided with sealing buffer layers (11), and the sealing buffer layers (11) are in contact with the outer walls of the battery body (2).

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