Protective housing for a square battery and method of mounting same

Abstract

This invention discloses a protective cover for a square battery and its installation method, including a battery cover, a battery base plate, and a battery body. The battery body is fixedly connected to the upper surface of the battery base plate by straps. Insertion holes are provided at both ends of the upper surface of the battery base plate. This invention utilizes insert blocks and locking blocks. In use, after the battery body is fixed to the battery base by the straps, the battery cover is directly placed on top of the battery body. The insert blocks are inserted into the insertion holes, and the locking blocks are locked in the slots of the protective blocks. Furthermore, four locking blocks located at the four corners of the lower surface of the battery cover are also locked in the slots, thus achieving the installation of the battery cover. When the battery cover needs to be removed, simply push the locking blocks into the grooves inside the slots. After all four locking blocks are simultaneously pushed into the grooves, the battery cover can be directly removed from the top of the battery body, greatly simplifying the battery cover removal process.

Description

Technical Field

[0001] This invention relates to a protective casing for a square battery and its installation method, belonging to the field of battery products. Background Technology

[0002] Using batteries as an energy source provides a stable voltage, stable current, and long-term stable power supply with minimal external influence. Furthermore, batteries have a simple structure, are easy to carry, and are simple to charge and discharge. They are unaffected by external climate and temperature, and their performance is stable and reliable, playing a significant role in all aspects of modern life.

[0003] Batteries are usually fitted with a protective casing to protect their structure, seal off the internal and external environments, and extend their lifespan.

[0004] Current battery protection cases typically involve fixing the square battery inside the bottom of the case, and then using several screws to fix the protective cover to the top of the case to achieve a closed installation of the square battery. This installation method is relatively troublesome when the internal battery needs to be disassembled for maintenance, so it has certain limitations in use. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a protective casing for a square battery and its installation method, thereby improving the maintainability of the product.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] The present invention relates to a protective casing for a square battery, comprising a battery cover and a battery base plate, wherein the battery cover and the battery base plate form a square battery casing, and the battery pack is installed inside the battery casing. The battery base plate has multiple through-holes at both ends of its edge. Each of the four corners of the lower edge of the battery cover plate has a fixed insert block. The insert block has a groove on its side, and a locking block is slidably connected inside the groove. A spring is provided between the locking block and the bottom of the groove. A protective block is fixedly connected to the lower surface of the battery base plate near the through-holes. A horizontal slot is formed inside the protective block, with the slot direction consistent with the groove direction. The battery cover plate is fastened onto the battery base plate, the insert blocks are inserted into the through-holes, and the locking blocks are embedded in the slots to fix the battery base plate and the battery cover plate together.

[0008] According to the protective casing of the square battery, auxiliary fixing rods perpendicular to the inner surface are provided on both inner sides of the battery cover. The auxiliary fixing rods have internal grooves for installing auxiliary telescopic rods. A roller is rotatably connected to one outer end of the auxiliary telescopic rods. A spring mechanism is provided between the inner bottom ends of the auxiliary telescopic rods and the auxiliary fixing rods.

[0009] According to the protective housing of a square battery, the inner groove of the auxiliary fixing rod extends to both sides to form a positioning groove, and a limiting block is slidably connected inside the limiting groove. The limiting block is fixedly connected to the end of the auxiliary telescopic rod inside the auxiliary fixing rod, and the movement range of the limiting block is within the limiting groove.

[0010] According to the protective casing of a square battery, the upper surface of the battery cover is provided with a temperature and humidity display and a first wiring port, the upper surface of the battery pack is provided with a second wiring port, and the second wiring port is connected to the temperature and humidity display and the first wiring port through a wire.

[0011] According to the protective casing of a square battery, heat dissipation vents are provided on both sides of the battery cover and the battery pack, and a plurality of heat dissipation vents are provided.

[0012] According to the protective casing of a square battery, the battery cover is a multi-layer composite structure, with a waterproof layer on the outermost layer made of a high-molecular polymer material, an insulating layer on the inner side of the waterproof layer made of rubber, and a matrix layer on the inner side of the insulating layer.

[0013] According to the protective casing of a square battery, a heat insulation layer is provided on the inner side of the matrix layer, and a flame retardant layer is provided on the inner side of the heat insulation layer, wherein the flame retardant layer and the heat insulation layer are made of asbestos.

[0014] According to the protective casing of a square battery, the two sides of the battery base plate are folded upward to form side folded edges, and strapping holes are opened on the side folded edges. The battery pack is placed on the battery base plate and fixed to the strapping holes on the folded edges by strapping.

[0015] According to the protective casing of a square battery, the four corners of the battery cover are provided with auxiliary fixing nails, and the four corners of the battery pack are provided with four auxiliary fixing grooves corresponding to the positions of the auxiliary fixing nails.

[0016] The method for installing a protective casing for a square battery includes the following steps:

[0017] Step 1: Secure the battery pack to the battery base plate with straps. Tie the straps to the folded edges on both sides of the battery pack, ensuring that the straps do not cover the second terminal. Then, connect the wire inside the second terminal. After stretching the wire, connect the other end of the wire to the inside of the first terminal on the surface of the battery cover. Connect the other wire to the temperature and humidity display on the battery cover.

[0018] Step 2: Place the battery cover on the upper surface of the battery pack, and insert the four corners of the lower surface of the battery cover into the holes on the battery base plate. After insertion, the clips will be popped out of the groove by the elasticity of the spring telescopic rod and locked in the slot inside the protective block, thus realizing the installation of the battery cover.

[0019] Step 3: After the position of the clip is fixed, four auxiliary fixing screws are threaded into the four auxiliary fixing slots to help fix the position of the battery cover.

[0020] Step 4: Install auxiliary fixing rods, auxiliary telescopic rods, and rollers on the inner two sides of the battery cover. The rollers enable the battery cover to slide up and down on both sides of the battery pack. After installation, the auxiliary telescopic rods are pushed inward by the elastic action of the spring mechanism, thereby limiting the left and right positions of the battery pack. The limiting blocks and limiting grooves are used to limit the sliding position of the auxiliary telescopic rods inside the auxiliary fixing rods.

[0021] Step 5: When it is necessary to disassemble the battery cover, remove the four auxiliary fixing screws, and push the clips into the grooves inside the slots. After all four clips are pushed into the grooves at the same time, directly remove the battery cover from the battery pack and battery base plate.

[0022] Compared with the prior art, the present invention provides a protective cover for a square battery and its installation method, which has the following beneficial effects:

[0023] 1. This invention, through the design of insert blocks and locking blocks, allows for easy installation. After the battery body is secured to the battery base with straps, the battery cover is placed directly over the top of the battery body. The insert blocks are inserted into the sockets, while the locking blocks are secured in the slots of the protective blocks. Furthermore, four locking blocks located at the four corners of the lower surface of the battery cover are also secured in their slots, thus facilitating the installation of the battery cover. To remove the battery cover, simply push the locking blocks into the grooves within the slots. Once all four locking blocks are in place, the battery cover can be easily removed from the top of the battery body, greatly simplifying the disassembly process.

[0024] 2. The protective block of this invention can protect the positions of the locking block and the insertion block when the battery is in use, preventing the battery cover from falling off due to accidental contact. The first and second wiring ports are electrically connected to each other by wires, which can enable the battery to be used with external electrical appliances. The heat dissipation vent effectively solves the problem of heat dissipation of the battery body.

[0025] 3. With the auxiliary fixing nails and auxiliary fixing grooves, after the battery cover is fixedly installed on the battery base plate, four auxiliary fixing nails can be threaded to the four corners of the battery cover to achieve the purpose of auxiliary fixing of the battery cover. The temperature and humidity display can be set to display the air temperature and humidity of the battery body inside the battery cover in real time.

[0026] 4. The present invention, through the setting of auxiliary fixing rod, auxiliary telescopic rod and roller, allows the battery cover to slide up and down on both sides of the battery body during installation. After installation, the auxiliary telescopic rod is pushed inward by the elastic action of the spring mechanism, thereby limiting the left and right position of the battery body. The setting of limiting block and limiting groove facilitates the limitation of the sliding position of the auxiliary telescopic rod inside the auxiliary fixing rod.

[0027] 5. This invention ensures the waterproof performance of the battery cover through a waterproof layer and the polymer material inside the waterproof layer; it also ensures the insulation performance of the outer side of the battery cover through an insulating layer and the rubber material inside the insulating layer; and it ensures the outer surface of the battery cover does not get hot through a heat insulation layer and a flame retardant layer, and the asbestos material inside the heat insulation layer and the flame retardant layer, thereby increasing the safety of the battery. Attached Figure Description

[0028] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention, but do not constitute a limitation thereof. In the drawings:

[0029] Figure 1 This is a schematic diagram of the structure of the protective cover plate for the square battery proposed in this invention;

[0030] Figure 2 This is a schematic diagram of the structure of the battery body in the protective cover of the square battery proposed in this invention;

[0031] Figure 3 This is a schematic diagram of the structure of the insert block in the protective cover of the square battery proposed in this invention.

[0032] Figure 4 This is a schematic diagram of the structure of the insertion hole on the bottom plate of the square battery in the protective cover of the square battery proposed in this invention;

[0033] Figure 5 This is a sectional view from the side of the protective cover of the square battery proposed in this invention.

[0034] Figure 6This is a cross-sectional view of the auxiliary fixing rod in the protective cover of the square battery proposed in this invention;

[0035] Figure 7 This is a schematic diagram of the material structure of the battery cover in the protective cover of the square battery proposed in this invention;

[0036] In the diagram: 1. Battery cover; 2. Auxiliary fixing pin; 3. First wiring port; 4. Temperature and humidity display; 5. Heat dissipation vent; 6. Battery base plate; 7. Battery body; 8. Binding strap; 9. Second wiring port; 10. Auxiliary fixing groove; 11. Insert block; 12. Groove; 13. Spring telescopic rod; 14. Locking block; 15. Insertion hole; 16. Protective block; 17. Locking groove; 18. Auxiliary fixing rod; 19. Roller; 20. Auxiliary telescopic rod; 21. Limiting groove; 22. Limiting block; 23. Spring mechanism; 24. Waterproof layer; 25. Insulating layer; 26. Matrix layer; 27. Heat insulation layer; 28. Flame retardant layer. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] Please see Figure 1-7This invention provides a technical solution: a protective cover for a square battery and its installation method, comprising a battery cover 1, a battery base plate 6, and a battery body 7. The battery body 7 is fixedly connected to the upper surface of the battery base plate 6 by a strap 8. Insertion holes 15 are provided at both ends of the upper surface of the battery base plate 6. Auxiliary fixing grooves 10 are provided at the four corners of the upper surface of the battery body 7. Auxiliary fixing nails 2 are threaded into the internal parts of the auxiliary fixing grooves 10. The battery cover 1 is fixedly connected to the battery body 7 through the auxiliary fixing grooves 10 and the auxiliary fixing nails 2. On the upper surface of the battery cover plate 1, at each of the four corners of the lower surface, there are fixed inserts 11. The outer surface of the insert 11 has a groove 12. The inside of the groove 12 is slidably connected to a locking block 14. A spring telescopic rod 13 is provided between the locking block 14 and the inner wall of the groove 12. On the lower surface of the battery base plate 6, near the insertion hole 15, there is a fixed protective block 16. The inside of the protective block 16 has a through slot 17. In this invention, through the inserts 11 and locking blocks 14, the battery body 7 is fixedly installed on the battery base 6 by the strap 8. After installation, the battery cover 1 is placed directly on top of the battery body 7. The insert block 11 is inserted into the socket 15, and the locking block 14 is locked into the slot 17 of the protective block 16. The four locking blocks 14 located at the four corners of the lower surface of the battery cover 1 are also locked into the slots 17, thus achieving the installation of the battery cover 1. When the battery cover 1 needs to be removed, simply push the locking blocks 14 into the grooves 12 inside the slots 17. Once all four locking blocks 14 are simultaneously pushed into the grooves 12, the battery cover 1 can be directly removed from the battery. The battery cover 1 can be removed from the top of the battery body 7, which greatly facilitates the disassembly process. The protective block 16 can protect the positions of the clip 14 and the insertion block 11 when the battery is in use, preventing the battery cover 1 from falling off due to accidental contact. After the battery cover 1 is fixedly installed on the battery base plate 6 by the auxiliary fixing nails 2 and the auxiliary fixing grooves 10, four auxiliary fixing nails 2 can be threaded at the four corners of the battery cover 1 to achieve the purpose of auxiliary fixation of the battery cover 1.

[0039] In this invention, preferably, the upper surface of the battery cover 1 is provided with a temperature and humidity display 4 and a first wiring port 3.

[0040] In this invention, preferably, the upper surface of the battery body 7 is provided with a second terminal 9, and the second terminal 9 is electrically connected to the temperature and humidity display 4 and the first terminal 3 through a wire. By providing the first terminal 3 and the second terminal 9, and the first terminal 3 and the second terminal 9 being electrically connected to each other through a wire, the purpose of connecting the battery to an external electrical appliance can be achieved.

[0041] In this invention, preferably, heat dissipation vents 5 are provided on both sides of the battery cover plate 1 and the battery body 7. Several heat dissipation vents 5 are provided, and the heat dissipation problem of the battery body 7 is effectively solved by the heat dissipation vents 5.

[0042] In this invention, preferably, auxiliary fixing rods 18 are provided on both inner sides of the battery cover 1, and an auxiliary telescopic rod 20 is slidably connected to one end of the auxiliary fixing rod 18, and a roller 19 is rotatably connected to one end of the auxiliary telescopic rod 20.

[0043] In this invention, preferably, a spring mechanism 23 is provided between the inner bottom ends of the auxiliary telescopic rod 20 and the auxiliary fixed rod 18.

[0044] In this invention, preferably, limiting grooves 21 are provided on both sides of the auxiliary fixing rod 18. Limiting blocks 22 are slidably connected inside the limiting grooves 21. The limiting blocks 22 are fixedly connected to the two side surfaces of the auxiliary telescopic rod 20. Through the auxiliary fixing rod 18, the auxiliary telescopic rod 20 and the roller 19, the roller 19 realizes the purpose of the battery cover 1 sliding up and down on both sides of the battery body 7. After installation, the auxiliary telescopic rod 20 is pushed into the inside of the battery cover 1 by the elastic action of the spring mechanism 23, thereby limiting the left and right side positions of the battery body 7. The limiting blocks 22 and the limiting grooves 21 are used to limit the sliding position of the auxiliary telescopic rod 20 inside the auxiliary fixing rod 18.

[0045] In this invention, preferably, the outermost layer of the internal material of the battery cover 1 is provided with a waterproof layer 24, the interior of the waterproof layer 24 is made of a polymer material, the inner side of the waterproof layer 24 is provided with an insulating layer 25, the interior of the insulating layer 25 is made of rubber material, and the inner side of the insulating layer 25 is provided with a matrix layer 26. The waterproof performance of the battery cover 1 is ensured by the waterproof layer 24 and the polymer material inside the waterproof layer 24, and the insulation performance of the outer side of the battery cover 1 is ensured by the insulating layer 25 and the rubber material inside the insulating layer 25.

[0046] In this invention, preferably, a heat insulation layer 27 is provided on the inner side of the matrix layer 26, and a flame retardant layer 28 is provided on the inner side of the heat insulation layer 27. Both the flame retardant layer 28 and the heat insulation layer 27 are made of asbestos. Through the heat insulation layer 27 and the flame retardant layer 28, and through the asbestos material inside the heat insulation layer 27 and the flame retardant layer 28, it is ensured that the outer surface of the battery cover 1 will not get hot, and the flame retardant performance of the battery cover 1 is guaranteed, thereby increasing the safety of the battery.

[0047] A method for installing a protective cover for a square battery includes the following steps:

[0048] Step 1: When in use, fix the battery body 7 to the battery base plate 6 with the straps 8. The straps 8 are tied to both sides of the battery body 7, and the position of the straps 8 does not cover the position of the second terminal 9. Then connect the wire inside the second terminal 9, that is, after the wire is stretched, it is electrically connected to the inside of the two first terminal 3 on the surface of the battery cover plate 1. The other wire is electrically connected to the temperature and humidity display 4 set on the battery cover plate 1.

[0049] Step 2: Place the battery cover 1 on the upper surface of the battery body 7, and insert the four corners of the lower surface of the battery cover 1 into the insertion holes 15 of the battery base plate 6. After insertion, the locking block 14 will be popped out of the groove 12 by the elasticity of the spring telescopic rod 13 and locked in the slot 17 inside the protective block 16, thereby realizing the installation of the battery cover 1.

[0050] Step 3: After the position of the clip 14 is fixed, it is then connected to the inside of the four auxiliary fixing slots 10 by four auxiliary fixing nails 2, thereby playing an auxiliary role in fixing the position of the battery cover 1.

[0051] Step 4: The auxiliary fixing rod 18, auxiliary telescopic rod 20 and roller 19 are set on the inner two sides of the battery cover plate 1. The roller 19 enables the battery cover plate 1 to slide up and down on both sides of the battery body 7. After installation, the auxiliary telescopic rod 20 is pushed into the inside of the battery cover plate 1 by the elastic action of the spring mechanism 23, thereby limiting the left and right positions of the battery body 7. The limiting block 22 and the limiting groove 21 are set to limit the sliding position of the auxiliary telescopic rod 20 inside the auxiliary fixing rod 18.

[0052] Step 5: When it is necessary to disassemble the battery cover 1, remove the four auxiliary fixing screws 2, and push the locking block 14 into the groove 12 inside the slot 17. After the four locking blocks 14 are pushed into the groove 12 at the same time, the battery cover 1 can be directly removed from the battery body 7 and the battery base plate 6.

[0053] The working principle and usage process of this invention are as follows: In use, the battery body 7 is fixedly installed on the battery base plate 6 using straps 8. The straps 8 are tied to both sides of the battery body 7, ensuring they do not cover the second wiring port 9. Then, a wire is connected inside the second wiring port 9; that is, after the wire is stretched, it is electrically connected to the inside of the two first wiring ports 3 on the surface of the battery cover plate 1. Another wire is electrically connected to the temperature and humidity display 4 installed on the battery cover plate 1. The battery cover plate 1 is placed over the upper surface of the battery body 7, and the inserts 11 located at the four corners of the lower surface of the battery cover plate 1 are inserted into the insertion holes 15 of the battery base plate 6. After insertion, the locking blocks 14 are elastically ejected from the grooves 12 by the spring telescopic rod 13 and locked inside the slots 17 inside the protective block 16, thus achieving the installation of the battery cover plate 1. After the position of the locking blocks 14 is fixed, they are then threaded onto four auxiliary fixing pins 2. The inside of the fixed groove 10 provides auxiliary fixing for the position of the battery cover 1. Auxiliary fixing rods 18, auxiliary telescopic rods 20, and rollers 19 are provided on the inner two sides of the battery cover 1. The rollers 19 allow the battery cover 1 to slide up and down on both sides of the battery body 7. After installation, the spring mechanism 23 pushes the auxiliary telescopic rod 20 inwards towards the battery cover 1, thus limiting the left and right positions of the battery body 7. Limiting blocks 22 and limiting grooves 21 limit the sliding position of the auxiliary telescopic rod 20 within the auxiliary fixing rod 18. When the battery cover 1 needs to be disassembled, the four auxiliary fixing pins 2 are removed, and the locking blocks 14 are pushed into the grooves 12 inside the locking slots 17. After all four locking blocks 14 are pushed into the grooves 12 simultaneously, the battery cover 1 can be directly removed from the battery body 7 and the battery base plate 6.

[0054] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A protective casing for a square battery, comprising a battery cover (1) and a battery base plate (6), wherein the battery cover (1) and the battery base plate (6) form a square battery casing, and a battery pack is installed inside the battery casing, characterized in that, Multiple insertion holes (15) are provided through both ends of the battery base plate (6). Insert blocks (11) are fixedly connected to the four corners of the lower edge of the battery cover plate (1). A groove (12) is provided on the side of the insertion block (11). A locking block (14) is slidably connected inside the groove (12). A spring telescopic rod (13) is provided between the locking block (14) and the bottom of the groove (12). A protective block (16) is fixedly connected to the side of the lower surface of the battery base plate (6) near the insertion hole (15). A horizontal slot (17) is provided through the inside of the protective block (16). The slot direction is consistent with the groove direction. The battery cover plate (1) is fastened on the battery base plate (6). The insertion block (11) is inserted into the insertion hole (15). The locking block (14) is embedded in the slot to fix the battery base plate and the battery cover plate. The battery cover (1) has auxiliary fixing rods (18) perpendicular to the inner surface on both sides. The auxiliary fixing rods (18) have internal grooves for installing auxiliary telescopic rods (20). A roller (19) is rotatably connected to one outer end of the auxiliary telescopic rod (20). A spring mechanism (23) is provided between the inner bottom ends of the auxiliary telescopic rod (20) and the auxiliary fixing rod (18). The internal groove of the auxiliary fixing rod (18) extends into limiting grooves (21) on both sides. The limiting groove (21) is slidably connected to a limiting block (22). The limiting block (22) is fixedly connected to the end of the auxiliary telescopic rod (20) inside the auxiliary fixing rod (18). The movement range of the limiting block is within the limiting groove.

2. The protective casing for a square battery according to claim 1, characterized in that: The upper surface of the battery cover (1) is provided with a temperature and humidity display (4) and a first wiring port (3), and the upper surface of the battery pack (7) is provided with a second wiring port (9), and the second wiring port (9) is connected to the temperature and humidity display (4) and the first wiring port (3) through a wire.

3. The protective casing for a square battery according to claim 1, characterized in that: The battery cover (1) and the battery pack (7) are provided with heat dissipation vents (5) on both sides, and there are several heat dissipation vents (5).

4. The protective casing for a square battery according to claim 1, characterized in that: The battery cover (1) is a multi-layer composite structure. The outermost layer is provided with a waterproof layer (24), which is made of a high-molecular polymer material. An insulating layer (25) is provided on the inner side of the waterproof layer (24), which is made of rubber material. A matrix layer (26) is provided on the inner side of the insulating layer (25).

5. The protective casing for a square battery according to claim 4, characterized in that: The inner side of the matrix layer (26) is provided with a heat insulation layer (27), and the inner side of the heat insulation layer (27) is provided with a flame retardant layer (28), and the flame retardant layer (28) and the heat insulation layer (27) are made of asbestos.

6. The protective casing for a square battery according to claim 1, characterized in that: The two sides of the battery base plate (6) are folded upward to form side folded edges. Strap holes are opened on the side folded edges. The battery pack is placed on the battery base plate and fixed to the strap holes of the folded edges by straps.

7. The protective casing for a square battery according to claim 1, characterized in that: The battery cover is provided with auxiliary fixing nails (2) at the four corners, and four auxiliary fixing slots (10) are provided at the four corners of the battery pack corresponding to the positions of the auxiliary fixing nails (2).

8. A method for installing a protective casing for a square battery according to any one of claims 1-7, characterized in that: Includes the following steps: Step 1: Fix the battery pack (7) on the battery base plate (6) with the strap (8). The strap (8) is tied to the folded edges on both sides of the battery pack (7), and the position of the strap (8) does not cover the position of the second terminal (9). Then connect the wire inside the second terminal (9). After the wire is stretched, the other end of the wire is connected to the inside of the first terminal (3) on the surface of the battery cover plate (1). The other wire is electrically connected to the temperature and humidity display (4) set on the battery cover plate (1). Step 2: Place the battery cover (1) on the upper surface of the battery pack (7), and insert the four corners of the lower surface of the battery cover (1) into the insertion holes (15) of the battery base plate (6). After insertion, the locking block (14) will be popped out of the groove (12) by the elasticity of the spring telescopic rod (13) and locked in the slot (17) inside the protective block (16), thereby realizing the installation of the battery cover (1). Step 3: After the position of the card block (14) is fixed, it is then connected to the inside of the four auxiliary fixing slots (10) by four auxiliary fixing nails (2) to play an auxiliary fixing role in the position of the battery cover (1); Step 4: The auxiliary fixing rod (18), auxiliary telescopic rod (20) and roller (19) are set on the inner two sides of the battery cover (1). The roller (19) enables the battery cover (1) to slide up and down on both sides of the battery pack (7). After installation, the auxiliary telescopic rod (20) is pushed into the inner side of the battery cover (1) by the elastic action of the spring mechanism (23), thereby limiting the left and right positions of the battery pack (7). The limiting block (22) and limiting groove (21) are set to limit the sliding position of the auxiliary telescopic rod (20) inside the auxiliary fixing rod (18). Step 5: When it is necessary to disassemble the battery cover (1), remove the four auxiliary fixing nails (2), and push the card block (14) into the groove (12) inside the card slot (17). After the four card blocks (14) are pushed into the groove (12) at the same time, directly remove the battery cover (1) from the battery pack (7) and the battery base plate (6).

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