A packaging box structure and assembly method for a fully sealed assembled lithium battery module

Abstract

This invention relates to a packaging box structure and assembly method for a fully sealed assembled lithium battery module, comprising a packaging box body with a cover plate; a connecting structure between the packaging box body and the cover plate; partitions installed on the packaging box body; multiple sets of partitions cooperating to divide the packaging box body into multiple battery compartments; fitting grooves formed on the partitions; a locking structure provided in the battery compartment, the locking structure including clamping blocks slidably fitted into the fitting grooves; a fixing plate also provided on the packaging box body; a buffer structure provided on the fixing plate to reduce the impact of vibration on the lithium battery module; and the fixing plate and the partitions connected by a snap-fit ​​structure; the snap-fit ​​structure connects the fixing plate and the partitions, thereby providing a certain degree of protection and position restriction for the lithium battery module; the connecting structure connects the cover plate and the packaging box body; the installation of the lithium battery module requires no additional work, effectively improving installation efficiency.

Description

Technical Field

[0001] This invention relates to a packaging box structure and assembly method for a fully sealed assembled lithium battery module. Background Technology

[0002] The fabrication of lithium-ion batteries generally involves connecting multiple lithium-ion cells in parallel or series, taking into account system mechanical strength, thermal management, and BMS matching. Key technologies include overall structural design, welding and processing control, protection rating, and active thermal management systems.

[0003] In terms of overall structural design, outer packaging boxes are often used to increase the overall strength of the battery module. The packaging box mainly consists of the box body, box cover, metal bracket, and panel, which can be regarded as the "skeleton" of the battery PACK, playing a role in support, resisting mechanical impact and vibration, and protecting the environment. The various parts are usually fixed together with screws.

[0004] Because the connection strength requirements between different parts are different, different types of screws are used. Therefore, different tools are needed to fix the screws during the assembly process. Moreover, many screws are needed to assemble a single box. Frequent changes of fixing tools and repeated tightening processes greatly reduce assembly efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide a packaging box structure and assembly method for a fully sealed assembled lithium battery module, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A packaging box structure for a fully sealed assembled lithium battery module includes a packaging box body, on which a cover plate is provided; A connecting structure is provided between the packaging box and the cover plate, and the connecting structure can restrict the displacement of the cover plate. The packaging box is equipped with multiple sets of partitions; the multiple sets of partitions cooperate with each other to divide the packaging box into multiple battery compartments; the partitions are provided with multiple sets of fitting slots. The battery compartment is provided with a locking structure, which includes a clamping block that slides into the fitting groove; during the installation of the lithium battery module into the battery compartment, the clamping block can be driven to slide into the battery compartment to clamp the lithium battery module. The packaging box is also equipped with a fixing plate; the fixing plate is equipped with a buffer structure to reduce the impact of vibration on the lithium battery module; and the fixing plate and the partition are connected by a snap-fit ​​structure.

[0007] As a further embodiment of the present invention: the locking structure further includes a base plate slidably installed inside the battery compartment; both ends of the base plate are slidably engaged with the partition; a groove is provided on the partition; a first wedge is slidably installed in the groove; a second wedge is slidably disposed in the partition; one end of the first wedge abuts against the base plate, and the other end abuts against one end of the second wedge; a first buffer spring is disposed inside the first wedge; both ends of the first buffer spring abut against the first wedge and the packaging box; a sliding plate fixedly connected to the clamping block is slidably installed in the partition; the other end of the second wedge abuts against the sliding plate.

[0008] As a further embodiment of the present invention: the snap-fit ​​structure includes multiple sets of snap-fit ​​blocks installed on the partition; and there are gaps between the multiple sets of snap-fit ​​blocks; a slot is provided on the fixing plate; multiple sets of fitting blocks are installed on the slot; and there are gaps between the multiple sets of fitting blocks.

[0009] As a further embodiment of the present invention: the buffer structure includes a sleeve column mounted on the fixed plate, and symmetrically arranged sliding rods are slidably fitted at both ends of the sleeve column; a heat-conducting plate is mounted on the sliding rod; a second buffer spring is provided inside the sleeve column; and the two ends of the second buffer spring respectively abut against the two sliding rods.

[0010] As a further aspect of the present invention: the heat-conducting plate has a high thermal conductivity; and multiple sets of heat-conducting fins are installed on the cover plate.

[0011] As a further embodiment of the present invention: a pressure relief valve body is installed on the packaging box; a guide rod is installed inside the pressure relief valve body, and a piston is slidably fitted on the guide rod; and the piston is slidably and sealingly connected to the pressure relief valve body; a return spring is wrapped around the guide rod; the two ends of the return spring respectively abut against the piston and the pressure relief valve body; and multiple sets of pressure relief holes are provided on the pressure relief valve body.

[0012] As a further embodiment of the present invention: the connecting structure includes a connecting column installed on the packaging box; two sets of symmetrically arranged limiting blocks are installed on the connecting column; a shrinkage gap is provided between the two sets of limiting blocks; and a limiting groove is provided on the cover plate.

[0013] As a further aspect of the present invention: the limiting block is provided with a slot for releasing the limiting state of the connection structure.

[0014] As a further aspect of the present invention, the packaging box is provided with protrusions for increasing strength.

[0015] A method for packaging lithium battery modules using the fully sealed assembled lithium battery module packaging box structure as described above; comprising the following steps: Step 1: Install lithium battery modules: Place the packaging box stably on the workbench and install multiple lithium battery modules simultaneously in the battery compartment. During the installation process, the weight of the lithium battery modules will cause the locking structure to move, thereby causing the clamping blocks to move closer to each other, thus clamping and limiting the installed lithium battery modules. Step 2: Install the fixing plate: Connect the fixing plate and the partition together through the snap-fit ​​structure. During the connection process, one heat conduction plate is in contact with the lithium battery module. As the connection progresses, the slide bar near the battery compartment will move away from the battery compartment and drive the other slide bar to slide synchronously. Step 3: Install the cover plate; Align the limiting groove with the connecting column, apply external force to move the cover plate closer to the packaging box, and connect the cover plate to the packaging box through the connecting structure. During the connection process, the cover plate abuts against another heat-conducting plate and drives the heat-conducting plate closer to the battery compartment to compress the second buffer spring. Step 4: Check connection stability; use testing equipment to check the airtightness and connection strength of the packaging box.

[0016] Compared with the prior art, the beneficial effects of the present invention are: by connecting the fixing plate and the partition through the snap-fit ​​structure, the lithium battery module is provided with certain protection and position restriction; by connecting the cover plate and the packaging box through the connecting structure, the lithium battery module can be installed without any work, avoiding the need for frequent changes of installation tools and repeated tightening actions, which can effectively improve the installation efficiency and avoid damage to the packaging box caused by incorrect installation of connecting parts. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of an embodiment of the packaging box structure and assembly method for a fully sealed assembled lithium battery module.

[0018] Figure 2 This is a schematic diagram of another perspective of an embodiment of the packaging box structure and assembly method of a fully sealed assembled lithium battery module.

[0019] Figure 3 for Figure 1 A structural schematic diagram from a cross-sectional perspective.

[0020] Figure 4 for Figure 3 A schematic diagram of the structure at point A in the middle.

[0021] Figure 5 This is a schematic diagram of the partition structure in one embodiment of the packaging box structure and assembly method of a fully sealed assembled lithium battery module.

[0022] Figure 6 for Figure 5 A structural diagram from the perspective of an explosion.

[0023] Figure 7 This is a schematic diagram of the locking structure in one embodiment of the packaging box structure and assembly method for a fully sealed assembled lithium battery module.

[0024] Figure 8 This is a schematic diagram of the structure of the fixing plate in one embodiment of the packaging box structure and assembly method of a fully sealed assembled lithium battery module.

[0025] Figure 9 for Figure 8 A schematic diagram of the structure at point B.

[0026] Figure 10 This is a schematic diagram of the heat-conducting plate structure in one embodiment of the packaging box structure and assembly method of a fully sealed assembled lithium battery module.

[0027] Figure 11 This is a schematic diagram of the pressure relief valve body in one embodiment of the packaging box structure and assembly method of a fully sealed assembled lithium battery module.

[0028] In the diagram: 1. Packaging box body; 101. Connecting post; 102. Expansion joint; 103. Limiting block; 2. Cover plate; 201. Heat-conducting fins; 202. Limiting groove; 3. Partition plate; 301. Fitting groove; 302. Sliding groove; 303. Snap-fit ​​block; 4. Base plate; 5. First wedge; 6. Second wedge; 7. Skateboard; 701. Clamping block; 8. First buffer spring; 9. Fixing plate; 901. Slot; 902. Fitting block; 903. Sleeve post; 10. Slide bar; 1001. Heat conduction plate; 11. Second buffer spring; 12. Pressure relief valve body; 1201. Pressure relief port; 13. Guide rod; 14. Piston; 15. Return spring; 16. Battery compartment. Detailed Implementation

[0029] 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.

[0030] Furthermore, elements in this invention are referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intervening element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0031] Please see Figures 1-11 In this embodiment of the invention, a packaging box structure for a fully sealed assembled lithium battery module includes a packaging box body 1, on which a cover plate 2 is provided; A connecting structure is provided between the packaging box 1 and the cover plate 2, and the connecting structure can restrict the displacement of the cover plate 2; The packaging box 1 is equipped with multiple sets of partitions 3; the multiple sets of partitions 3 cooperate with each other to divide the packaging box 1 into multiple battery compartments 16; multiple sets of fitting grooves 301 are provided on the partitions 3. The battery compartment 16 is provided with a locking structure, which includes a clamping block 701 that slides into the fitting groove 301. During the process of installing the lithium battery module into the battery compartment 16, the clamping block 701 can be driven to slide into the battery compartment 16 to clamp the lithium battery module. The packaging box 1 is also provided with a fixing plate 9; the fixing plate 9 is provided with a buffer structure for reducing the impact of vibration on the lithium battery module; and the fixing plate 9 and the partition 3 are connected by a snap-fit ​​structure.

[0032] Taking the embodiment combining all the features described in this application as an example, when in use, multiple partitions 3 divide the packaging box 1 into multiple relatively independent battery compartments 16; a lithium battery module is installed in a battery compartment 16, which can effectively avoid direct contact between multiple lithium battery modules, effectively improve the heat transfer of the lithium battery module, and avoid mutual interference between multiple lithium battery modules, thereby improving the stability of the lithium battery module.

[0033] First, the packaging box 1 is installed on a stable workbench. Then, multiple lithium battery modules are simultaneously inserted into the battery compartment 16. After most of the lithium battery modules are inserted into the battery compartment 16, the weight of the lithium battery modules will cause the locking structure to move, thereby causing the clamping block 701 to slide in the fitting groove 301. In the initial state, the clamping block 701 is completely submerged in the fitting groove 301, so it will not hinder the insertion of the lithium battery modules. As the clamping block 701 slides, the clamping block 701 will gradually protrude out of the fitting groove 301. The clamping block 701 will come into contact with the lithium battery modules and provide a certain clamping force to the lithium battery modules, thereby preventing the lithium battery modules from shifting position during use and thus improving the stability of the lithium battery modules.

[0034] The fixing plate 9 and the partition plate 3 are then connected by a snap-fit ​​structure. The fixed plate 9 after connection can provide a certain degree of protection for the lithium battery module, so as to avoid damage to the lithium battery module during use and thus prevent dangerous accidents.

[0035] After the fixing plate 9 is connected to the partition plate 3, one end of the buffer structure on the fixing plate 9 will come into contact with the lithium battery module. Finally, the cover plate 2 is connected to the packaging box 1 through the connecting structure. During the connection process, the other end of the buffer structure will abut against the cover plate 2; the connecting structure will restrict the cover plate 2, thereby making the cover plate 2 and the packaging box 1 seal against each other.

[0036] During use, the buffer structure reduces the impact of vibration on the lithium battery module, thereby improving the stability of the lithium battery module.

[0037] The fixing plate 9 and the partition plate 3 are connected by a snap-fit ​​structure, which provides certain protection and position restriction for the lithium battery module. The cover plate 2 and the packaging box 1 are connected by a connecting structure. During the installation of the lithium battery module, no work is required, avoiding frequent changes of installation tools and repeated tightening actions. This can effectively improve the installation efficiency and prevent damage to the packaging box 1 due to incorrect installation of connecting parts.

[0038] In another embodiment of the present invention, the locking structure further includes a base plate 4 slidably installed in the battery compartment 16; both ends of the base plate 4 are slidably fitted with the partition 3; a groove 302 is provided on the partition 3; a first wedge 5 is slidably installed in the groove 302; a second wedge 6 is slidably disposed in the partition 3; one end of the first wedge 5 abuts against the base plate 4, and the other end abuts against one end of the second wedge 6; a first buffer spring 8 is disposed in the first wedge 5; both ends of the first buffer spring 8 abut against the first wedge 5 and the packaging box 1; a sliding plate 7 fixedly connected to the clamping block 701 is slidably installed in the partition 3; the other end of the second wedge 6 abuts against the sliding plate 7.

[0039] Taking the embodiment combining all the features described in this application as an example, when in use, the lithium battery module is inserted into the battery compartment 16. After most of the lithium battery module enters the battery compartment 16, it will come into contact with the base plate 4. Then, the gravity of the lithium battery module will drive the base plate 4 to slide closer to the packaging box 1.

[0040] The two ends of the first wedge 5 are set as inclined surfaces. During the sliding process of the base plate 4, the inclined surfaces will press the first wedge 5, causing it to slide away from the base plate 4 and compress the first buffer spring 8. During this process, the other inclined surface of the first wedge 5 will cooperate with the second wedge 6, thereby driving the second wedge 6 to move upward. The two inclined surfaces of the first wedge 5 can change the force of the base plate 4 moving downward into the force that causes the second wedge 6 to move upward.

[0041] The side of the second wedge 6 away from the first wedge 5 is a cone composed of two inclined surfaces. Each inclined surface abuts against a sliding plate 7. Therefore, as the second wedge 6 moves upward, it will cause the sliding plates 7 to move away from each other through the inclined surfaces, thereby causing the clamping block 701 to clamp the lithium battery module.

[0042] As the lithium battery module is inserted deeper into the battery compartment 16, the clamping block 701 slides a greater distance, resulting in a greater clamping force. When the lithium battery module is completely submerged in the battery compartment 16, the lithium battery module is in force balance (the resultant force of clamping force, friction force, gravity, etc. acting on the lithium battery module is zero).

[0043] After the locking structure clamps and locks the lithium battery module, factors such as shaking or flipping during transfer or docking with other structures will prevent the lithium battery module from easily separating from the battery compartment 16. Therefore, it can improve the safety and stability of the lithium battery module during use.

[0044] In another embodiment of the present invention, the snap-fit ​​structure includes multiple sets of snap-fit ​​blocks 303 mounted on the partition plate 3; and there are gaps between the multiple sets of snap-fit ​​blocks 303; a slot 901 is provided on the fixing plate 9; multiple sets of fitting blocks 902 are mounted on the slot 901; and there are gaps between the multiple sets of fitting blocks 902.

[0045] Taking the embodiment combining all the features described in this application as an example, during the docking process, the snap-fit ​​block 303 is first inserted into the slot 901 from the gap between the mating blocks 902, at which time the snap-fit ​​block 303 and the mating blocks 902 are misaligned with each other.

[0046] Then, an external force is applied to the fixing plate 9, which causes the interlocking block 902 to slide towards the snap-fit ​​block 303, so that the interlocking block 902 and the snap-fit ​​block 303 are aligned and engaged with each other. At this time, the fixing plate 9 and the partition plate 3 will not be easily separated under the engaging action of the snap-fit ​​block 303 and the interlocking block 902.

[0047] The fixing plate 9 and the partition plate 3 are connected by a snap-fit ​​structure, which provides certain protection and position restriction for the lithium battery module. The cover plate 2 and the packaging box 1 are connected by a connecting structure. During the installation of the lithium battery module, no work is required, avoiding frequent changes of installation tools and repeated tightening actions. This can effectively improve the installation efficiency and prevent damage to the packaging box 1 due to incorrect installation of connecting parts.

[0048] In another embodiment of the present invention, the buffer structure includes a sleeve post 903 mounted on the fixed plate 9, and symmetrically arranged slide rods 10 are slidably fitted at both ends of the sleeve post 903; a heat-conducting plate 1001 is mounted on the slide rod 10; a second buffer spring 11 is provided inside the sleeve post 903; and the two ends of the second buffer spring 11 respectively abut against the two slide rods 10.

[0049] Taking the embodiment combining all the features described in this application as an example, during use, when the fixing plate 9 and the partition plate 3 are connected, the heat conduction plate 1001 will first come into contact with the lithium battery module. As the connection proceeds, the lithium battery module will continuously squeeze the heat conduction plate 1001, thereby driving one slide rod 10 to move away from the battery compartment 16, and driving the other slide rod 10 to move synchronously through the second buffer spring 11.

[0050] During the connection process between the cover plate 2 and the packaging box 1, another heat-conducting plate 1001 will first come into contact with the cover plate 2. Then, as the cover plate 2 moves closer to the packaging box 1, the heat-conducting plate 1001 will move closer to the battery compartment 16, thereby driving the slide bar 10 to move synchronously, thereby compressing the second buffer spring 11.

[0051] When the packaging box is subjected to vibrations caused by factors such as rear impact or shaking, the vibrations will first be transmitted to the first buffer spring 8 and the second buffer spring 11. The elastic force of the second buffer spring 11 and the first buffer spring 8 reduces the efficiency of the vibration transmission to the battery compartment 16, thereby improving the stability of the connection between lithium battery modules and avoiding vibration-induced loosening of the connection and resulting in a circuit break.

[0052] In another embodiment of the present invention, the heat-conducting plate 1001 has a high thermal conductivity; and multiple sets of heat-conducting fins 201 are installed on the cover plate 2.

[0053] Taking the embodiment combining all the features described in this application as an example, during use, the lithium battery module itself releases heat. Before installing the mounting plate 9, thermal grease is applied to the heat-conducting plate 1001 to further increase heat transfer. The heat is conducted to the cover plate 2 through the heat-conducting plate 1001, and the heat-conducting fins 201 increase the contact area with the air, thereby increasing the heat dissipation efficiency of the cover plate 2; thus avoiding high temperature damage to the stability of the lithium battery module.

[0054] In another embodiment of the present invention, a pressure relief valve body 12 is installed on the packaging box 1; a guide rod 13 is installed inside the pressure relief valve body 12, and a piston 14 is slidably fitted on the guide rod 13; and the piston 14 is slidably and sealingly connected to the pressure relief valve body 12; a return spring 15 is wrapped around the guide rod 13; the two ends of the return spring 15 respectively abut against the piston 14 and the pressure relief valve body 12; and multiple sets of pressure relief holes 1201 are provided on the pressure relief valve body 12.

[0055] Taking the embodiment combining all the features described in this application as an example, when in use, as the lithium battery module is used, the temperature inside the packaging box 1 will rise, causing the internal air to expand due to heat.

[0056] When the gas expands, it squeezes the piston 14, causing it to slide away from the packaging box 1 on the guide rod 13.

[0057] In the initial state, piston 14 blocks pressure relief hole 1201; gas expansion will cause the internal pressure of packaging box 1 to increase; when piston 14 moves under the action of gas expansion, it will increase the conduction area between pressure relief hole 1201 and packaging box 1, and compress return spring 15.

[0058] When the pressure relief hole 1201 is connected to the packaging box 1, the expanded gas will flow outward through the pressure relief hole 1201, thereby reducing the air pressure inside the packaging box 1 and thus avoiding the high pressure environment from affecting the stability of the lithium battery module.

[0059] When the air pressure inside the packaging box 1 is insufficient to move the piston 14, the spring force of the return spring 15 will cause the piston 14 to slide into the packaging box 1 to re-block the pressure relief hole 1201 and maintain the sealing of the packaging box 1.

[0060] In another embodiment of the present invention, the connecting structure includes a connecting post 101 installed on the packaging box 1; two sets of symmetrically arranged limiting blocks 103 are installed on the connecting post 101; a shrinkage joint 102 is provided between the two sets of limiting blocks 103; and a limiting groove 202 is provided on the cover plate 2.

[0061] Taking the embodiment combining all the features described in this application as an example, when installing the cover plate 2, first connect the connecting post 101 and the limiting groove 202; then press the cover plate 2 so that the limiting block 103 passes through the limiting groove 202. Since the maximum distance between the two limiting blocks 103 is greater than the diameter of the limiting groove 202, and the side of the limiting block 103 near the cover plate 2 is set as a slope, the limiting block 103 will first deform under the squeezing action of the slope and the groove wall of the limiting groove 202, thus moving closer to each other and reducing the gap of the shrinkage joint 102. After the limiting block 103 has completely passed through the limiting groove 202, under the action of the elastic force of the limiting block 103 itself, the limiting block 103 will elastically reset, and the gap of the shrinkage joint 102 will also be restored. At this time, the limiting block 103 and the cover plate 2 are engaged with each other, thereby connecting the cover plate 2 and the packaging box 1 together.

[0062] The fixing plate 9 and the partition plate 3 are connected by a snap-fit ​​structure, which provides certain protection and position restriction for the lithium battery module. The cover plate 2 and the packaging box 1 are connected by a connecting structure. During the installation of the lithium battery module, no work is required, avoiding frequent changes of installation tools and repeated tightening actions. This can effectively improve the installation efficiency and prevent damage to the packaging box 1 due to incorrect installation of connecting parts.

[0063] In another embodiment of the present invention, the limiting block 103 is provided with a slot for releasing the limiting state of the connection structure.

[0064] Taking the embodiment combining all the features described in this application as an example, when it is necessary to maintain the lithium battery module inside the packaging box 1, a specific tool is used to clamp the two limiting blocks 103 through the slot and bring them close to each other, shrinking the shrinkage seam 102 so that the cover plate 2 can be pulled out from the packaging box 1.

[0065] Because there are multiple connecting structures, and the cover plate 2 can only be pulled out from the packaging box 1 when the multiple connecting structures are simultaneously released from their restricted states, users cannot easily disassemble or assemble the packaging box, thus avoiding the occurrence of safety accidents.

[0066] In another embodiment of the present invention, the packaging box 1 is provided with protrusions for increasing strength.

[0067] Taking the embodiment combining all the features described in this application as an example, when in use, the protruding design can increase the strength of the packaging box 1, thereby reducing the possibility of the packaging box 1 deforming after being impacted, thereby increasing the protective effect of the packaging box 1 on the lithium battery module.

[0068] A method for packaging lithium battery modules using the fully sealed assembled lithium battery module packaging box structure as described above; comprising the following steps: Step 1: Install lithium battery modules: Smoothly install the packaging box 1 on the workbench, and simultaneously install multiple lithium battery modules in the battery compartment 16. During the installation process, the gravity of the lithium battery modules will drive the locking structure to move, thereby causing the clamping blocks 701 to move closer to each other, thus clamping and limiting the installed lithium battery modules. Step 2: Install the fixing plate 9: Connect the fixing plate 9 to the partition plate 3 through the snap-fit ​​structure. During the connection process, one heat conduction plate 1001 contacts the lithium battery module. As the connection progresses, the slide bar 10 near the battery compartment 16 will move away from the battery compartment 16 and drive the other slide bar 10 to slide synchronously. Step 3: Install cover plate 2; Align the limiting groove 202 with the connecting column 101, apply external force to make cover plate 2 move closer to the packaging box 1, and connect cover plate 2 and packaging box 1 together through the connecting structure. During the connection process, cover plate 2 abuts against another heat conduction plate 1001 and drives heat conduction plate 1001 to move closer to battery compartment 16 to compress the second buffer spring 11. Step 4: Check connection stability; use testing equipment to check the airtightness and connection strength of the packaging box.

[0069] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0070] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A packaging box structure for a fully sealed assembled lithium battery module, comprising a packaging box body (1), wherein a cover plate (2) is provided on the packaging box body (1). Its features are, A connection structure is provided between the packaging box (1) and the cover plate (2), and the connection structure can restrict the displacement of the cover plate (2); The packaging box (1) is equipped with multiple sets of partitions (3); the multiple sets of partitions (3) cooperate with each other to divide the packaging box (1) into multiple battery compartments (16); multiple sets of fitting grooves (301) are opened on the partitions (3); The battery compartment (16) is provided with a locking structure, which includes a clamping block (701) that slides into the fitting groove (301); during the installation of the lithium battery module into the battery compartment (16), the clamping block (701) can be driven to slide into the battery compartment (16) to clamp the lithium battery module. The packaging box (1) is also provided with a fixing plate (9); the fixing plate (9) is provided with a buffer structure for reducing the impact of vibration on the lithium battery module; and the fixing plate (9) and the partition (3) are connected by a snap-fit ​​structure. The locking structure also includes a base plate (4) slidably installed in the battery compartment (16); the two ends of the base plate (4) are slidably fitted with the partition (3); a groove (302) is provided on the partition (3); a first wedge (5) is slidably installed in the groove (302); a second wedge (6) is slidably installed in the partition (3); one end of the first wedge (5) abuts against the base plate (4), and the other end abuts against one end of the second wedge (6); a first buffer spring (8) is provided in the first wedge (5); the two ends of the first buffer spring (8) abut against the first wedge (5) and the packaging box (1); a sliding plate (7) fixedly connected to the clamping block (701) is slidably installed in the partition (3); the other end of the second wedge (6) abuts against the sliding plate (7).

2. The packaging box structure for a fully sealed assembled lithium battery module according to claim 1, characterized in that, The snap-fit ​​structure includes multiple sets of snap-fit ​​blocks (303) installed on the partition (3); and there are gaps between the multiple sets of snap-fit ​​blocks (303); a slot (901) is provided on the fixing plate (9); multiple sets of fitting blocks (902) are installed on the slot (901); and there are gaps between the multiple sets of fitting blocks (902).

3. The packaging box structure for a fully sealed assembled lithium battery module according to claim 2, characterized in that, The buffer structure includes a sleeve column (903) mounted on the fixed plate (9), with symmetrically arranged slide rods (10) slidably fitted at both ends of the sleeve column (903); a heat-conducting plate (1001) is mounted on the slide rod (10); a second buffer spring (11) is provided inside the sleeve column (903); the two ends of the second buffer spring (11) respectively abut against the two slide rods (10).

4. The packaging box structure for a fully sealed assembled lithium battery module according to claim 3, characterized in that, The heat-conducting plate (1001) has a high thermal conductivity; and multiple sets of heat-conducting fins (201) are installed on the cover plate (2).

5. The packaging box structure for a fully sealed assembled lithium battery module according to claim 4, characterized in that, The packaging box (1) is equipped with a pressure relief valve body (12); a guide rod (13) is installed inside the pressure relief valve body (12), and a piston (14) is slidably fitted on the guide rod (13); the piston (14) is slidably sealed to the pressure relief valve body (12); a return spring (15) is wrapped around the guide rod (13); the two ends of the return spring (15) respectively abut against the piston (14) and the pressure relief valve body (12); the pressure relief valve body (12) is provided with multiple sets of pressure relief holes (1201).

6. The packaging box structure for a fully sealed assembled lithium battery module according to claim 5, characterized in that, The connection structure includes a connecting column (101) installed on the packaging box (1); two sets of symmetrically arranged limiting blocks (103) are installed on the connecting column (101); a shrinkage joint (102) is provided between the two sets of limiting blocks (103); and a limiting groove (202) is provided on the cover plate (2).

7. The packaging box structure for a fully sealed assembled lithium battery module according to claim 6, characterized in that, The limiting block (103) has a slot for releasing the limiting state of the connection structure.

8. The packaging box structure for a fully sealed assembled lithium battery module according to claim 7, characterized in that, The packaging box (1) is fitted with protrusions to increase strength.

9. A method for packaging lithium battery modules using the packaging box structure of the fully sealed assembled lithium battery module as described in claim 8; characterized in that, Includes the following steps: Step 1: Install lithium battery modules: Install the packaging box (1) stably on the workbench and install multiple lithium battery modules in the battery compartment (16) simultaneously. During the installation process, the gravity of the lithium battery modules will drive the locking structure to move, thereby driving the clamping blocks (701) to move closer to each other, thereby clamping and limiting the installed lithium battery modules. Step 2: Install the fixing plate (9): Connect the fixing plate (9) and the partition plate (3) together through the snap-fit ​​structure. During the connection process, one heat conduction plate (1001) contacts the lithium battery module. As the connection proceeds, the slide bar (10) near the battery compartment (16) will move away from the battery compartment (16) and drive the other slide bar (10) to slide synchronously. Step 3: Install the cover plate (2); Align the limiting groove (202) with the connecting column (101), apply external force to make the cover plate (2) move closer to the packaging box (1), and connect the cover plate (2) and the packaging box (1) together through the connecting structure. During the connection process, the cover plate (2) abuts against another heat-conducting plate (1001) and drives the heat-conducting plate (1001) to move closer to the battery compartment (16) to compress the second buffer spring (11). Step 4: Check connection stability; use testing equipment to check the airtightness and connection strength of the packaging box.

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