A floating battery mounting structure and a mounting method

Abstract

This invention discloses a floating battery mounting structure and method, belonging to the field of power supply for underground coal mine equipment. The floating battery mounting structure and method of this invention includes an explosion-proof enclosure, the interior of which is divided into three chambers: a battery chamber, a control chamber, and a wiring chamber. Sealing components are installed in each of the three chambers. A connecting component is located on the side of the wiring chamber of the explosion-proof enclosure to ensure the sealing of the wiring ports. Multiple fixing seats are welded and fixed inside the battery chamber of the explosion-proof enclosure. This invention, through its floating mounting structure, employs a multi-level flexible buffer and automatic correction mechanism, ensuring that the battery pack remains in an elastically isolated state when subjected to external impacts. This effectively prevents rigid impacts from being directly transmitted to individual battery cells. This structure significantly reduces the risk of battery leakage, puncture, and thermal runaway caused by vibration, collision, or drops, fundamentally improving the safety and reliability of explosion-proof lithium-ion battery power supplies in the harsh working conditions of underground coal mines.

Description

Technical Field

[0001] This invention relates to the field of power supply technology for underground coal mine equipment, and in particular to a floating battery mounting structure and mounting method. Background Technology

[0002] In underground coal mines, explosion-proof lithium-ion batteries are widely used in mobile equipment such as electric rubber-wheeled vehicles, monorail cranes, support transport vehicles, and inspection robots, as well as in backup power systems for emergency lighting and monitoring. However, the underground environment in coal mines is harsh, with narrow tunnels and uneven surfaces. During transportation, installation, and use, power modules often face severe vibrations, accidental overturning, or even falling, which can easily lead to displacement of internal electrode plates, diaphragm damage, electrolyte leakage, and in extreme cases, even short circuits and thermal runaway, generating high temperatures, sparks, or ejected debris, seriously threatening safe production underground.

[0003] Currently, most explosion-proof lithium-ion battery power supplies use a rigid fixing method for their internal battery packs. During handling or impact, the impact force is directly transmitted to the individual battery cells, lacking an effective buffering and mitigation mechanism. This makes it difficult to fundamentally prevent battery safety accidents caused by mechanical damage. Therefore, improving the impact resistance of explosion-proof lithium-ion battery power supplies in underground handling and use environments, and preventing internal battery damage caused by vibration, flipping, or drops, has become a critical technical issue that urgently needs to be addressed to ensure the safety of underground power supply and the reliable operation of equipment in coal mines.

[0004] To address the aforementioned issues, this invention aims to provide a floating battery mounting structure and method. This structure, through an innovative internal buffer design, enables the battery pack to "float" within the casing, effectively absorbing and attenuating impact and vibration energy from all directions. This prevents impact forces from directly acting on individual battery cells, thereby significantly reducing the risk of leakage, puncture, or even thermal runaway caused by collisions or drops during underground transportation. This greatly improves the safety and reliability of the power supply in the complex environment of underground coal mines. Summary of the Invention

[0005] The purpose of this invention is to provide a floating battery mounting structure and mounting method, which can solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a floating battery mounting structure, comprising an explosion-proof enclosure, the interior of which is divided into three chambers: a battery chamber, a control chamber, and a wiring chamber. Sealing components are installed on the three chambers. A connecting component is installed on the side of the wiring chamber of the explosion-proof enclosure to ensure the sealing of the wiring port. Multiple fixing seats are welded and fixed inside the battery chamber of the explosion-proof enclosure. An upper pressure plate is mounted on the fixing seats and fixed to the fixing seats by screws. Multiple springs are installed at the bottom of the upper pressure plate and at the bottom of the battery chamber of the explosion-proof enclosure. Protective components are installed at the ends of the springs. A battery mounting shell is connected between two sets of protective components. A battery pack is installed inside the battery mounting shell. A guide component is installed inside the spring to provide precise guidance. A limit component is installed on the side of the battery mounting shell to guide the battery pack back to axial movement and to provide radial limit.

[0007] Preferably, the sealing assembly includes chamber cover plates and fastening bolts. There are three chamber cover plates, which are respectively installed on the top of the three chambers of the explosion-proof enclosure. The fastening bolts are connected to the edge of the chamber cover plates, and the chamber cover plates are fixedly connected to the explosion-proof enclosure by the fastening bolts.

[0008] Preferably, the sealing assembly further includes a sealing groove and a sealing strip. The sealing groove is located at the top of the explosion-proof enclosure, and the sealing strip is connected to the bottom of the chamber cover. The sealing strip is compatible with the sealing groove.

[0009] Preferably, the sealing assembly further includes a connector and a handle, the connector being fixedly mounted on the chamber cover plate, and the handle being rotatably connected to the connector.

[0010] Preferably, the connection assembly includes a connection hole, a terminal block, and a protective connector. The connection hole is formed through the wiring cavity side wall of the explosion-proof enclosure, the terminal block is fixed to the side wall of the explosion-proof enclosure, and the position of the terminal block corresponds to the position of the connection hole. The protective connector is threaded to the end of the terminal block.

[0011] Preferably, the protective component includes a first protective plate and a second protective plate, and two first protective plates are provided for each of the first and second protective plates. The two first protective plates are respectively provided at the top and bottom of the battery mounting shell, and the second protective plate is attached to the first protective plate.

[0012] Preferably, the guide assembly includes a limiting plate, a guide shaft, and a guide hole. The limiting plate is fixed to the top of the upper pressure plate and the bottom of the battery cavity of the explosion-proof box. The guide shaft is fixed to the limiting plate. The guide hole is opened on the battery mounting shell. The guide shaft and the guide hole are slidably connected. A spring is sleeved on the outside of the guide shaft.

[0013] Preferably, the first protective plate is made of silicone, the second protective plate is made of nylon, the first protective plate and the second protective plate are fastened together by screws, and the remaining holes on the first protective plate and the second protective plate are matched with the guide shaft to ensure that the battery mounting shell moves stably along the axial direction.

[0014] Preferably, the limiting component includes a guide rail, a mounting base, and a bearing roller. The guide rail is welded and fixed to the inner wall of the battery cavity of the explosion-proof enclosure, the mounting base is fixed to the side wall of the battery mounting shell, and the bearing roller is rotatably connected to the mounting base. The bearing roller has a groove adapted to the guide rail.

[0015] An installation method for a floating battery mounting structure includes the following steps:

[0016] Step 1: Weld and fix multiple fixing seats and guide rails inside the battery cavity of the explosion-proof box, and install the limit plate and guide shaft of the guide assembly on the upper pressure plate;

[0017] Step 2: Install the protective components on the top and bottom of the battery mounting case respectively. Attach the first protective plate made of silicone and the second protective plate made of nylon in sequence, and fasten them to the surface of the battery mounting case with screws, ensuring that the holes on the protective plates correspond to the positions of the guide shaft.

[0018] Step 3: Place the battery pack into the battery mounting case and fix it in place. Place the battery mounting case into the battery cavity, so that the guide shaft passes through the bottom protective plate, the guide hole of the battery mounting case and the top protective plate in sequence. Pre-install springs at the bottom of the battery cavity and the bottom of the upper pressure plate. The springs are sleeved on the outside of the guide shaft.

[0019] Step 4: Fix the mounting base on the side wall of the battery mounting case, rotatably connect the grooved bearing roller to the mounting base, and make the groove of the bearing roller slide with the guide rail. Place the upper pressure plate on the fixed base and tighten it with screws to form an axial floating space.

[0020] Step 5: Lay sealing strips in the sealing grooves at the top of the three chambers, cover the chambers with the cover plates, and secure them with fastening bolts; thread the protective connector to the wiring head on the side wall of the wiring chamber to complete the wiring port sealing.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. This invention achieves energy dissipation in a tiered manner through a composite structure of springs and flexible protective plates. When an external impact acts on the explosion-proof enclosure, the battery mounting shell first absorbs the initial kinetic energy through an axially distributed spring group (e.g., downward impact compresses the lower spring, and upward impact compresses the upper spring). When the spring deformation reaches its limit, the first protective plate made of silicone and the second protective plate made of nylon work together to participate in buffering. The silicone layer provides high elastic deformation to prolong the impact time, while the nylon layer converts kinetic energy into heat energy through molecular chain friction, avoiding the battery pack from being subjected to rigid collisions and effectively suppressing mechanical damage such as battery electrode deformation and separator puncture. At the same time, the spring guide shaft constraint buffering process always proceeds along the axial direction, avoiding internal structural stress concentration caused by off-center loading of the battery, fundamentally reducing the risk of thermal runaway caused by vibration, drops, and other operating conditions, and extending the battery cycle life.

[0023] 2. This invention employs a dual-stage protection system of axial guidance and radial limiting. The spring-embedded guide shaft forms the primary positioning system, restricting the battery pack from floating on the set axis. When a non-vertical impact causes the battery pack to tilt, the guide rail and bearing roller welded to the housing immediately form the secondary protection. The roller grooves are precisely fitted with the guide rail, converting the offset force into rolling friction, forcing the battery pack to resume axial movement. During this process, the low friction characteristics of the bearing roller significantly reduce the reset resistance, while the rigid support of the guide rail effectively suppresses radial sway, completely avoiding chain failures such as loose connection terminals and structural collisions of the housing caused by the tilting of the battery pack. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the frontal planar structure of the present invention;

[0025] Figure 2 This is a top-view schematic diagram of the structure of the present invention;

[0026] Figure 3 This is a front view schematic diagram of the battery mounting housing structure of the present invention;

[0027] Figure 4 This is a schematic diagram of the half-section planar structure of the battery mounting shell of the present invention;

[0028] Figure 5 This is a top view schematic diagram of the upper pressure plate structure of the present invention;

[0029] Figure 6 This is a schematic diagram of the half-section planar structure of the explosion-proof enclosure of the present invention;

[0030] Figure 7 This is a schematic diagram of the guide rod structure of the present invention;

[0031] Figure 8 This is a schematic diagram of the guide rail planar structure of the present invention;

[0032] Figure 9This is a schematic diagram of the internal structure of the explosion-proof enclosure of the present invention.

[0033] In the diagram: 1. Explosion-proof enclosure; 21. Chamber cover; 22. Fastening bolt; 23. Connecting seat; 24. Handle; 31. Wiring terminal; 32. Protective connector; 4. Fixing seat; 5. Upper pressure plate; 6. Spring; 71. First protective plate; 72. Second protective plate; 8. Battery mounting shell; 9. Battery pack; 101. Limiting plate; 102. Guide shaft; 103. Guide hole; 111. Guide rail; 112. Mounting seat; 113. Bearing roller. Detailed Implementation

[0034] 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.

[0035] Refer to the instruction manual appendix Figures 1 to 9 A floating battery mounting structure includes an explosion-proof enclosure 1. The interior of the explosion-proof enclosure 1 is divided into three chambers: a battery chamber, a control chamber, and a wiring chamber. Sealing components are installed on the three chambers. A connecting component is installed on the side of the wiring chamber of the explosion-proof enclosure 1 to ensure the sealing of the wiring port. Multiple fixing seats 4 are welded and fixed inside the battery chamber of the explosion-proof enclosure 1. An upper pressure plate 5 is mounted on the fixing seat 4 and fixed to the fixing seat 4 by screws. Multiple springs 6 are installed at the bottom of the upper pressure plate 5 and the bottom of the battery chamber of the explosion-proof enclosure 1. Protective components are installed at the ends of the springs 6. A battery mounting shell 8 is connected between the two sets of protective components. A battery pack 9 is installed inside the battery mounting shell 8. A guide component is installed on the inner side of the spring 6 to provide precise guidance for the spring 6. A limit component is installed on the side of the battery mounting shell 8 to guide the battery pack 9 to resume axial movement and to provide radial limit.

[0036] It should be noted that inside the battery cavity of the explosion-proof enclosure 1, the battery mounting shell 8 is suspended by springs 6 at the top and bottom. The guide component runs through the inside of the spring 6 to constrain the direction of movement, and the limiting component provides radial constraint on the side. The battery pack 9 is always buffered along the axial direction to avoid direct rigid impact. Throughout the process, the battery pack 9 is isolated from mechanical stress by the multi-layer flexible connection and buffer mechanism, which significantly reduces battery damage and safety risks caused by vibration, overturning or falling.

[0037] Refer to the instruction manual appendix Figure 1 and Figure 2The sealing assembly includes a chamber cover plate 21 and fastening bolts 22. There are three chamber cover plates 21, which are respectively installed on the top of the three chambers of the explosion-proof enclosure 1. The fastening bolts 22 are connected to the edge of the chamber cover plate 21, and the chamber cover plate 21 is fixedly connected to the explosion-proof enclosure 1 by the fastening bolts 22.

[0038] It should be noted that the chamber cover 21 is pressed onto the top of the explosion-proof enclosure 1 chamber by the fastening bolts 22 on the edge, forming a physical isolation. The three independent chamber covers 21 realize the explosion pressure isolation of the battery chamber, control chamber and wiring chamber. The fastening bolts 22 provide uniform clamping force to ensure the airtightness of the chamber.

[0039] Refer to the instruction manual appendix Figure 1 and Figure 2 The sealing assembly also includes a sealing groove and a sealing strip. The sealing groove is located on the top of the explosion-proof enclosure 1, and the sealing strip is connected to the bottom of the chamber cover 21. The sealing strip is compatible with the sealing groove.

[0040] It should be noted that the sealing strip at the bottom of the chamber cover 21 is embedded in the sealing groove at the top of the explosion-proof enclosure 1. Under pressure, it deforms and fills the micro gaps. The sealing strip and the sealing groove form an adaptive sealing interface, which compensates for processing errors, blocks external combustible gases from entering the chamber, and meets the explosion-proof standard requirements.

[0041] Refer to the instruction manual appendix Figure 1 and Figure 2 The sealing assembly also includes a connecting seat 23 and a handle 24. The connecting seat 23 is fixedly installed on the chamber cover plate 21, and the handle 24 is rotatably connected to the connecting seat 23.

[0042] It should be noted that the handle 24 is hinged to the chamber cover 21 via the connecting seat 23, which is designed to facilitate maintenance personnel to open the cover for inspection.

[0043] Refer to the instruction manual appendix Figure 2 The connection assembly includes a connection hole, a terminal block 31, and a protective connector 32. The connection hole is formed through the wiring cavity side wall of the explosion-proof enclosure 1. The terminal block 31 is fixed to the side wall of the explosion-proof enclosure 1, and the position of the terminal block 31 corresponds to the position of the connection hole. The protective connector 32 is threaded to the end of the terminal block 31.

[0044] It should be noted that the external cable is inserted into the connector through the protective head. Tightening the protective head compresses the internal sealing ring, causing it to expand radially and seal the connection hole. The threaded connection of the protective head forms a mechanical explosion-proof barrier, and the sealing ring deforms under pressure to achieve dual protection against explosion and water.

[0045] Refer to the instruction manual appendix Figures 3 to 6The protective components include a first protective plate 71 and a second protective plate 72. Two first protective plates 71 and two second protective plates 72 are provided. The two first protective plates 71 are respectively provided on the top and bottom of the battery mounting shell 8, and the second protective plate 72 is attached to the first protective plate 71.

[0046] It should be noted that the first protective plate 71 and the second protective plate 72 are respectively attached to the top and bottom surfaces of the battery mounting shell 8 and are connected by screws to form a composite buffer layer. The double protective plates dissipate energy in layers. The first protective plate 71 absorbs high-frequency vibrations, and the second protective plate 72 suppresses low-frequency oscillations, covering the entire surface of the battery mounting shell 8 and eliminating local stress concentration points.

[0047] Refer to the instruction manual appendix Figures 4 to 9 The guide assembly includes a limiting piece 101, a guide shaft 102, and a guide hole 103. The limiting piece 101 is fixed to the top of the upper pressure plate 5 and the bottom of the battery cavity of the explosion-proof box 1. The guide shaft 102 is fixed on the limiting piece 101. The guide hole 103 is opened on the battery mounting shell 8. The guide shaft 102 and the guide hole 103 are slidably connected. The spring 6 is sleeved on the outside of the guide shaft 102.

[0048] It should be noted that the guide shaft 102 is fixed to the limiting piece 101 and passes through the guide hole 103 of the battery mounting shell 8. The spring 6 is sleeved on the outside of the guide shaft 102. The guide shaft 102 and the guide hole 103 are in sliding fit to ensure that the spring 6 is only compressed axially.

[0049] Refer to the instruction manual appendix Figures 4 to 9 The first protective plate 71 is made of silicone, and the second protective plate 72 is made of nylon. The first protective plate 71 and the second protective plate 72 are fastened together by screws, and the remaining holes on the first protective plate 71 and the second protective plate 72 are matched with the guide shaft 102 to ensure that the battery mounting shell 8 moves stably along the axial direction.

[0050] It should be noted that the first protective plate 71 made of silicone absorbs the impact during large deformation, the second protective plate 72 made of nylon dissipates energy through molecular chain friction, the silicone layer prolongs the impact time and reduces the peak acceleration, and the nylon layer provides rigid support to prevent the battery mounting shell 8 from touching the bottom and colliding.

[0051] Refer to the instruction manual appendix Figures 4 to 9 The limiting component includes a guide rail 111, a mounting base 112, and a bearing roller 113. The guide rail 111 is welded and fixed to the inner wall of the battery cavity of the explosion-proof enclosure 1. The mounting base 112 is fixed to the side wall of the battery mounting shell 8. The bearing roller 113 is rotatably connected to the mounting base 112. The bearing roller 113 has a groove that matches the guide rail 111.

[0052] It should be noted that the bearing roller 113 is fixed to the side wall of the battery mounting shell 8 by the mounting base 112, and its groove is engaged with the guide rail 111 welded to the explosion-proof box 1. The guide rail 111 and the bearing roller 113 form a rolling pair, which converts radial offset into axial guidance. The groove structure prevents derailment and ensures the controllability of movement under extreme working conditions.

[0053] Working principle: When an external impact acts on the explosion-proof enclosure 1, the battery mounting shell 8 responds dynamically through the springs 6 at the top and bottom. If the impact force is downward, the spring 6 at the bottom of the battery cavity compresses first, pushing the first protective plate 71 and the second protective plate 72 at the bottom to transmit buffering force to the battery mounting shell 8. When the deformation of the spring 6 reaches its limit, the silicone protective plate undergoes elastic compression, and the nylon protective plate further dissipates energy through material deformation. Subsequently, the rebound energy causes the upper spring 6 to compress, and the top silicone and nylon protective plates participate in buffering simultaneously, forming reciprocating oscillations until the energy decays. If the impact direction is upward, the process proceeds in reverse and symmetrically. When the impact force deviates from the axial direction, causing the battery mounting shell 8 to tilt, the guide rail 111 welded to the inner wall of the battery cavity and the bearing roller 11... 3. Immediate intervention: The groove of the bearing roller 113 rolls along the surface of the guide rail 111, converting the radial offset into low-friction motion, forcibly correcting the posture of the battery mounting shell 8. At the same time, the guide shaft 102, which runs through the battery mounting shell 8, always slides within the guide hole 103, constraining the floating trajectory strictly along the axial direction. The chamber cover 21 is pressed against the sealing groove on the top of the explosion-proof box 1 through the sealing strip, blocking the intrusion of external combustible gases. After the protective joint 32 on the side wall of the wiring cavity is tightened, the sealing ring is squeezed to ensure a dual-effect seal of explosion-proof and waterproof at the connection hole. During this process, the rolling pair of the guide rail 111 and the bearing roller 113 eliminates radial displacement, and the guide shaft 102 maintains axial movement accuracy, so that the battery pack 9 is always in a flexible isolation state, completely avoiding the risk of rigid collision.

[0054] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A floating battery mounting structure, comprising an explosion-proof enclosure (1), characterized in that, The explosion-proof enclosure (1) is divided into three chambers: battery chamber, control chamber, and wiring chamber. Sealing components are installed in the three chambers. A connecting component is installed on the side of the wiring chamber of the explosion-proof enclosure (1). The connecting component is used to ensure the sealing of the wiring port. Multiple fixing seats (4) are welded and fixed inside the battery chamber of the explosion-proof enclosure (1). An upper pressure plate (5) is placed on the fixing seat (4). The upper pressure plate (5) is fixed to the fixing seat (4) by screws. Multiple springs (6) are installed at the bottom of the upper pressure plate (5) and the bottom of the battery chamber of the explosion-proof enclosure (1). A protective component is installed at the end of the spring (6). A battery mounting shell (8) is connected between the two sets of protective components. A battery pack (9) is installed inside the battery mounting shell (8). A guide component is installed on the inner side of the spring (6). The guide component is used to provide precise guidance for the spring (6). A limit component is installed on the side of the battery mounting shell (8). The limit component is used to guide the battery pack (9) to restore axial movement and play a radial limiting role.

2. The floating battery mounting structure as described in claim 1, characterized in that, The sealing assembly includes a chamber cover plate (21) and fastening bolts (22). There are three chamber cover plates (21). The three chamber cover plates (21) are respectively set on the top of the three chambers of the explosion-proof enclosure (1). The fastening bolts (22) are connected to the edge of the chamber cover plate (21). The chamber cover plate (21) is fixedly connected to the explosion-proof enclosure (1) by the fastening bolts (22).

3. The floating battery mounting structure as described in claim 2, characterized in that, The sealing assembly also includes a sealing groove and a sealing strip. The sealing groove is located on the top of the explosion-proof enclosure (1), and the sealing strip is connected to the bottom of the chamber cover (21). The sealing strip is compatible with the sealing groove.

4. The floating battery mounting structure as described in claim 3, characterized in that, The sealing assembly also includes a connector (23) and a handle (24). The connector (23) is fixedly mounted on the chamber cover (21), and the handle (24) is rotatably connected to the connector (23).

5. The floating battery mounting structure as described in claim 1, characterized in that, The connection assembly includes a connection hole, a connector (31), and a protective connector (32). The connection hole is opened through the wiring cavity side wall of the explosion-proof enclosure (1). The connector (31) is fixed to the side wall of the explosion-proof enclosure (1), and the position of the connector (31) corresponds to the position of the connection hole. The protective connector (32) is threaded to the end of the connector (31).

6. The floating battery mounting structure as described in claim 1, characterized in that, The protective assembly includes a first protective plate (71) and a second protective plate (72). There are two first protective plates (71) and two second protective plates (72). The two first protective plates (71) are respectively set on the top and bottom of the battery mounting shell (8), and the second protective plate (72) is attached to the first protective plate (71).

7. A floating battery mounting structure as described in claim 6, characterized in that, The guide assembly includes a limiting piece (101), a guide shaft (102), and a guide hole (103). The limiting piece (101) is fixed to the top of the upper pressure plate (5) and the bottom of the battery cavity of the explosion-proof box (1). The guide shaft (102) is fixed on the limiting piece (101). The guide hole (103) is opened on the battery mounting shell (8). The guide shaft (102) and the guide hole (103) are slidably connected. The spring (6) is sleeved on the outside of the guide shaft (102).

8. A floating battery mounting structure as described in claim 7, characterized in that, The first protective plate (71) is made of silicone, and the second protective plate (72) is made of nylon. The first protective plate (71) and the second protective plate (72) are fastened with screws, and the remaining holes on the first protective plate (71) and the second protective plate (72) are matched with the guide shaft (102) to ensure that the battery mounting shell (8) moves stably along the axial direction.

9. A floating battery mounting structure as described in claim 1, characterized in that, The limiting assembly includes a guide rail (111), a mounting base (112), and a bearing roller (113). The guide rail (111) is welded and fixed to the inner wall of the battery cavity of the explosion-proof enclosure (1). The mounting base (112) is fixed to the side wall of the battery mounting shell (8). The bearing roller (113) is rotatably connected to the mounting base (112). The bearing roller (113) has a groove that matches the guide rail (111).

10. The installation method of the floating battery mounting structure as described in any one of claims 1-9, characterized in that, Includes the following steps: Step 1: Weld and fix multiple fixing seats (4) and guide rails (111) inside the battery cavity of the explosion-proof box (1), and install the limiting piece (101) and guide shaft (102) of the guide assembly on the upper pressure plate (5). Step 2: Install protective components on the top and bottom of the battery mounting shell (8), and attach the first protective plate (71) made of silicone and the second protective plate (72) made of nylon in sequence. Secure them to the surface of the battery mounting shell (8) with screws, and ensure that the holes on the protective plates correspond to the positions of the guide shaft (102). Step 3: Place the battery pack (9) into the battery mounting shell (8) and fix it. Place the battery mounting shell (8) into the battery cavity and let the guide shaft (102) pass through the bottom protective plate, the guide hole (103) of the battery mounting shell (8) and the top protective plate in sequence. Pre-install springs (6) at the bottom of the battery cavity and the bottom of the upper pressure plate (5). The springs (6) are sleeved on the outside of the guide shaft (102). Step 4: Fix the mounting base (112) on the side wall of the battery mounting shell (8), rotatably connect the grooved bearing roller (113) to the mounting base (112), and make the groove of the bearing roller (113) slide with the guide rail (111). Place the upper pressure plate (5) on the fixed base (4) and lock it with screws to form an axial floating space. Step 5: Lay sealing strips in the sealing grooves at the top of the three chambers, cover the chamber cover plate (21), and fix it with fastening bolts (22); thread the protective connector (32) to the wiring head (31) on the side wall of the wiring chamber to complete the sealing of the wiring port.

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