Packaging box structure of fully-sealed assembled lithium battery module and assembling method of packaging box structure

Abstract

The invention relates to a packaging box structure of a fully-sealed assembled lithium battery module and an assembling method of the packaging box structure. The packaging box structure comprises a packaging box body, and a cover plate is arranged on the packaging box body; a connecting structure is arranged between the packaging box body and the cover plate; the packaging box body is provided with a partition plate. The plurality of groups of partition plates are matched with one another to divide the interior of the packaging box into a plurality of battery cabins; an embedding groove is formed in the partition plate; a locking structure is arranged in the battery compartment and comprises a clamping block which is embedded in the embedding groove in a sliding manner; a fixing plate is further arranged on the packaging box body; a buffer structure for reducing the influence of vibration on the lithium battery module is arranged on the fixed plate; the fixing plate and the partition plate are connected through a clamping structure; the fixing plate and the partition plate are connected through the clamping structure, so that certain protection and position limitation are provided for the lithium battery module, and the cover plate and the packaging box body are connected through the connecting structure; in the installation process of the lithium battery module, no work is needed, and the installation efficiency can be effectively improved.

Description

Technical Field

[0001] The invention relates to a packaging box structure of a fully sealed assembled lithium battery module and an assembling method thereof. Background Art

[0002] The production of lithium-ion batteries generally refers to connecting multiple lithium-ion single cell groups in parallel and series, and considering issues such as system mechanical strength, thermal management, and BMS matching. Its important technologies are reflected in overall structural design, welding and processing technology control, protection level, and active thermal management system.

[0003] In the overall structural design, the outer packaging box is often used to increase the overall strength of the battery module; the packaging box is mainly composed of the box body, box cover, metal bracket, and panel, which can be regarded as the "skeleton" of the battery pack, playing the role of support, resistance to mechanical shock, mechanical vibration and environmental protection. Screws are often used to fix the various parts.

[0004] Since the connection strength requirements between various parts are different, the types of screws used are also different. Therefore, different tools are needed to fix the screws during the assembly process. In addition, many screws are needed to assemble a packaging box. Frequent replacement of fixing tools and repeated tightening processes greatly reduce assembly efficiency. Summary of the invention

[0005] The object of the present invention is to provide a packaging box structure of a fully sealed assembled lithium battery module and an assembly method thereof, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions: A packaging box structure for a fully sealed assembled lithium battery module, comprising a packaging box body, wherein a cover plate is arranged on the packaging box body; A connecting structure is provided between the packaging box and the cover plate, and the connecting structure can limit the displacement of the cover plate; The packaging box is equipped with multiple groups of partitions; the multiple groups of partitions cooperate with each other to divide the packaging box into multiple battery compartments; the partitions are provided with multiple groups of fitting grooves; The battery compartment is provided with a locking structure, and the locking structure includes a clamping block slidably embedded in the embedding groove; when the lithium battery module is installed in 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 provided with a fixing plate; the fixing plate is provided with a buffer structure for reducing the influence of vibration on the lithium battery module; and the fixing plate is connected to the partition plate through a clamping structure.

[0007] As a further solution of the present invention: the locking structure also includes a bottom plate slidably installed in the battery compartment; the two ends of the bottom plate are slidably engaged with the partition; a sliding groove is provided on the partition; a first wedge block is slidably installed in the sliding groove; a second wedge block is slidably arranged in the partition; one end of the first wedge block is in contact with the bottom plate, and the other end thereof is in contact with one end of the second wedge block; a first buffer spring is arranged in the first wedge block; the two ends of the first buffer spring are in contact with the first wedge block and the packaging box body; a slide plate fixedly connected to the clamping block is slidably installed in the partition; the other end of the second wedge block is in contact with the slide plate.

[0008] As a further solution of the present invention: the clamping structure includes multiple groups of clamping blocks installed on the partition; and there are gaps between the multiple groups of clamping blocks; a clamping slot is opened on the fixed plate; multiple groups of mosaic blocks are installed on the clamping slot; and there are gaps between the multiple groups of mosaic blocks.

[0009] As a further solution of the present invention: the buffer structure includes a sleeve column installed on the fixed plate, and the two ends of the sleeve column are slidably engaged with symmetrically arranged sliding rods; a heat conducting plate is installed on the sliding rod; a second buffer spring is arranged in the sleeve column; the two ends of the second buffer spring respectively contact with the two sliding rods.

[0010] As a further solution of the present invention: the thermal conductivity of the heat conducting plate is relatively high; and a plurality of groups of heat conducting fins are installed on the cover plate.

[0011] As a further solution of the present invention: a pressure relief valve body is installed on the packaging box body; a guide rod is installed in the pressure relief valve body, and a piston is slidably engaged on the guide rod; and the piston is slidingly and sealingly connected to the pressure relief valve body; a return spring is wrapped around the guide rod; two ends of the return spring are respectively in contact with the piston and the pressure relief valve body; and a plurality of pressure relief holes are provided on the pressure relief valve body.

[0012] As a further solution of the present invention: the connection structure includes a connection column installed on the packaging box body; two groups of symmetrically arranged limit blocks are installed on the connection column; a shrinkage seam is provided between the two groups of limit blocks; and a limit groove is provided on the cover plate.

[0013] As a further solution of the present invention: the limit block is provided with a notch for releasing the limit state of the connection structure.

[0014] As a further solution of the present invention: a protrusion for increasing strength is installed on the packaging box.

[0015] A method for packaging a lithium battery module using the packaging box structure of the fully sealed assembled lithium battery module as described above; comprising the following steps: Step 1: Install the lithium battery module: Install the packaging box stably on the workbench, and install multiple lithium battery modules in the battery compartment simultaneously. During the installation process, the gravity of the lithium battery module will drive the locking structure to move, thereby driving the clamping blocks to move closer to each other, thereby clamping and limiting the installed lithium battery module; Step 2: Install the fixing plate: Connect the fixing plate and the partition together through the clamping structure. During the connection process, a heat conducting plate contacts the lithium battery module. As the connection proceeds, the slide bar close to 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 limit groove with the connecting column, apply external force to make the cover plate approach the packaging box, connect the cover plate and the packaging box together through the connecting structure, and during the connection process, the cover plate contacts another heat conducting plate and drives the heat conducting plate to approach the battery compartment to compress the second buffer spring; Step 4: Check the connection stability; use the inspection device to check the air tightness and connection strength of the packaging box.

[0016] Compared with the prior art, the beneficial effects of the present invention are: the fixing plate and the partition are connected by a snap-on structure, thereby providing certain protection and position restriction for the lithium battery module, and the cover plate and the packaging box are connected by a connecting structure. During the installation of the lithium battery module, no work is required, and frequent replacement of installation tools and repeated tightening actions are avoided. The installation efficiency can be effectively improved, and the damage to the packaging box caused by incorrect installation of connecting parts can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The present invention is a structural schematic diagram of an embodiment of a packaging box structure of a fully sealed assembled lithium battery module and an assembly method thereof.

[0018] Figure 2 A structural schematic diagram from another perspective of an embodiment of a packaging box structure and an assembly method for a fully sealed assembled lithium battery module.

[0019] Figure 3 for Figure 1 Schematic diagram of the structure from a cross-sectional perspective.

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

[0021] Figure 5 The present invention is a schematic structural diagram of a partition in one embodiment of a packaging box structure and an assembly method for a fully sealed assembled lithium battery module.

[0022] Figure 6 for Figure 5 Schematic diagram of the structure from an exploded perspective.

[0023] Figure 7 The present invention is a structural schematic diagram of a locking structure in an embodiment of a packaging box structure and an assembly method for a fully sealed assembled lithium battery module.

[0024] Figure 8 The present invention is a schematic structural diagram of a fixing plate in one embodiment of a packaging box structure and an assembly method for a fully sealed assembled lithium battery module.

[0025] Fig. 9 for Figure 8 Schematic diagram of the structure at B in the figure.

[0026] Fig.10 The present invention is a schematic structural diagram of a heat conducting plate in one embodiment of a packaging box structure and an assembly method for a fully sealed assembled lithium battery module.

[0027] Fig.11 The present invention is a structural schematic diagram of a pressure relief valve body in one embodiment of a packaging box structure and an assembly method for a fully sealed assembled lithium battery module.

[0028] In the figure: 1, packaging box; 101, connecting column; 102, shrinkage joint; 103, limit block; 2. Cover plate; 201. Heat conducting fin; 202. Limiting groove; 3. partition; 301. fitting groove; 302. slide groove; 303. clamping block; 4. Bottom plate; 5. The first wedge; 6. Second wedge; 7. Slide plate; 701. Clamping block; 8. The first buffer spring; 9. Fixed plate; 901. Card slot; 902. Engaging block; 903. Sleeve column; 10. Sliding rod; 1001. Heat conducting plate; 11. Second buffer spring; 12. pressure relief valve body; 1201. pressure relief hole; 13. Guide rod; 14. Piston; 15. Return spring; 16. Battery compartment. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0031] See also Figure 1 to Figure 11 In an embodiment of the present invention, a packaging box structure of a fully sealed assembled lithium battery module includes a packaging box body 1, and a cover plate 2 is provided on the packaging box body 1; A connection structure is provided between the packaging box body 1 and the cover plate 2, and the connection structure can limit the displacement of the cover plate 2; The packaging box 1 is equipped with multiple groups of partitions 3; the multiple groups of partitions 3 cooperate with each other to divide the packaging box 1 into multiple battery compartments 16; the partitions 3 are provided with multiple groups of fitting grooves 301; The battery compartment 16 is provided with a locking structure, and the locking structure includes a clamping block 701 slidably engaged in the engaging groove 301; when the lithium battery module is installed in 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 body 1 is also provided with a fixing plate 9; the fixing plate 9 is provided with a buffer structure for reducing the influence of vibration on the lithium battery module; and the fixing plate 9 is connected to the partition plate 3 through a snap-fit ​​structure.

[0032] Taking the embodiment combining all the features described in the present application as an example, when in use, multiple partitions 3 divide the packaging box 1 into multiple relatively independent battery compartments 16; one lithium battery module is installed in one 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, install the packaging box 1 on a stable workbench, and then insert multiple lithium battery modules into the battery compartment 16 simultaneously; after most of the lithium battery modules are inserted into the battery compartment 16, the gravity of the lithium battery modules will drive the locking structure to move, thereby driving the clamping block 701 to slide in the interlocking groove 301; the clamping block 701 is completely immersed in the interlocking groove 301 in the initial state, so as not to hinder the insertion of the lithium battery module; as the clamping block 701 slides, the clamping block 701 will gradually expose the interlocking groove 301, the clamping block 701 will conflict with the lithium battery module, and provide a certain clamping force to the lithium battery module, so as to avoid the position displacement of the lithium battery module during use, thereby improving the stability of the lithium battery module.

[0034] Afterwards, the fixing plate 9 is connected to the partition plate 3 through a snap-on structure. The connected fixing plate 9 can provide certain protection for the lithium battery module, thereby preventing the lithium battery module from being damaged and causing dangerous accidents during use.

[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 contact the lithium battery module; Finally, the cover plate 2 is connected to the packaging box body 1 through the connecting structure. During the connection process, the other end of the buffer structure will conflict with the cover plate 2; the connecting structure will restrict the cover plate 2, so that the cover plate 2 and the packaging box body 1 are sealed and conflicted.

[0036] During use, the buffer structure will reduce 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-on structure, thereby providing 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, and frequent replacement of installation tools and repeated tightening actions are avoided. The installation efficiency can be effectively improved, and the packaging box 1 can be prevented from being damaged due to incorrect installation of connecting parts.

[0038] In another embodiment of the present invention, the locking structure also includes a bottom plate 4 slidably installed in the battery compartment 16; the two ends of the bottom plate 4 are slidably engaged with the partition 3; a slide groove 302 is opened on the partition 3; a first wedge block 5 is slidably installed in the slide groove 302; a second wedge block 6 is slidably arranged in the partition 3; one end of the first wedge block 5 is in contact with the bottom plate 4, and the other end thereof is in contact with one end of the second wedge block 6; a first buffer spring 8 is arranged in the first wedge block 5; the two ends of the first buffer spring 8 are in contact with the first wedge block 5 and the packaging box body 1; a slide plate 7 fixedly connected to the clamping block 701 is slidably installed in the partition 3; the other end of the second wedge block 6 is in contact with the slide plate 7.

[0039] Taking the embodiment combining all the features recorded 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 conflict with the bottom plate 4. Then the gravity of the lithium battery module will drive the bottom plate 4 to slide closer to the packaging box 1.

[0040] Both ends of the first wedge block 5 are arranged as inclined surfaces. During the sliding process of the bottom plate 4, the first wedge block 5 is pressed by the inclined surfaces, so that the bottom plate 4 slides in a direction away from the bottom plate 4 and compresses the first buffer spring 8. During this process, the other inclined surface of the first wedge block 5 cooperates with the second wedge block 6, thereby driving the second wedge block 6 to move upward. The two inclined surfaces of the first wedge block 5 can change the force of the bottom plate 4 moving downward into the force that causes the second wedge block 6 to move upward.

[0041] The side of the second wedge block 6 away from the first wedge block 5 is a cone composed of two inclined surfaces, each of which contacts a slide plate 7. Therefore, when the second wedge block 6 moves upward, the inclined surfaces will drive the slide plates 7 away from each other, thereby driving 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 sliding distance of the clamping block 701 becomes greater, and thus the clamping force becomes greater. When the lithium battery module is completely immersed in the battery compartment 16, the force on the lithium battery module is balanced (the resultant force of the clamping force, friction force, gravity, etc. acting on the lithium battery module is zero).

[0043] After the locking structure has completed the clamping and locking of the lithium battery module, factors such as shaking and flipping during the transfer or docking with other structures will not easily separate the lithium battery module from the battery compartment 16. Therefore, the safety and stability of the lithium battery module during use can be improved.

[0044] In another embodiment of the present invention, the snap-in structure includes multiple groups of snap-in blocks 303 installed on the partition 3; and there are gaps between the multiple groups of snap-in blocks 303; a snap slot 901 is opened on the fixed plate 9; multiple groups of mosaic blocks 902 are installed on the snap slot 901; and there are gaps between the multiple groups of mosaic blocks 902.

[0045] Taking the embodiment combining all the features described in the present application as an example, during use, during the docking process, the engaging block 303 is first inserted into the engaging slot 901 from the gap between the engaging blocks 902 , and at this time, the engaging block 303 and the engaging block 902 are offset from each other.

[0046] Afterwards, external force is applied to the fixing plate 9, thereby driving the engaging block 902 to slide in the direction of the snap-in block 303, so that the engaging block 902 and the snap-in block 303 are aligned with each other and engage with each other. At this time, the fixing plate 9 and the partition plate 3 cannot be easily separated due to the engagement of the snap-in block 303 and the engaging block 902.

[0047] The fixing plate 9 and the partition plate 3 are connected by a snap-on structure, thereby providing 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, and frequent replacement of installation tools and repeated tightening actions are avoided. The installation efficiency can be effectively improved, and the packaging box 1 can be prevented from being damaged due to incorrect installation of connecting parts.

[0048] In another embodiment of the present invention, the buffer structure includes a sleeve column 903 installed on the fixed plate 9, and the two ends of the sleeve column 903 are slidably engaged with symmetrically arranged sliding rods 10; a heat conducting plate 1001 is installed on the sliding rod 10; a second buffer spring 11 is arranged in the sleeve column 903; the two ends of the second buffer spring 11 respectively contact with the two sliding rods 10.

[0049] Taking the embodiment combining all the features recorded in the present application as an example, when in use, during the connection process between the fixing plate 9 and the partition 3, the heat conducting 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 conducting plate 1001, thereby driving one slide bar 10 to move away from the battery compartment 16, and driving the other slide bar 10 to move synchronously through the second buffer spring 11.

[0050] During the connection between the cover plate 2 and the packaging box 1, the other heat conducting plate 1001 will first come into contact with the cover plate 2. Then, as the cover plate 2 continues to approach the packaging box 1, the heat conducting plate 1001 will approach the battery compartment 16, thereby driving the slide rod 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-end impact and 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 will reduce the efficiency of vibration transmission to the battery compartment 16, thereby improving the stability of the connection between the lithium battery modules and avoiding the phenomenon of loose connection and circuit breaking due to vibration.

[0052] In another embodiment of the present invention, the thermal conductivity of the heat conducting plate 1001 is relatively high; and a plurality of groups of heat conducting fins 201 are installed on the cover plate 2 .

[0053] Taking the embodiment of all the features recorded in this application as an example, when the lithium battery module is in use, it will release heat. Before installing the fixing plate 9, heat dissipation silicone grease is first applied on the heat conducting plate 1001 to further increase heat transfer. The heat is transferred to the cover plate 2 through the heat conducting plate 1001, and the contact area with the air is increased through the heat conducting fins 201, thereby increasing the heat dissipation efficiency of the cover plate 2; thereby preventing high temperature from damaging 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 body 1; a guide rod 13 is installed in the pressure relief valve body 12, and a piston 14 is slidably engaged on the guide rod 13; and the piston 14 is slidingly and sealingly connected to the pressure relief valve body 12; a return spring 15 is wrapped around the guide rod 13; two ends of the return spring 15 are respectively in contact with the piston 14 and the pressure relief valve body 12; and a plurality of groups of pressure relief holes 1201 are opened on the pressure relief valve body 12.

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

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

[0057] In the initial state, the piston 14 blocks the pressure relief hole 1201 ; the gas expansion will cause the internal pressure of the packaging box 1 to increase; when the piston 14 moves under the action of the gas expansion, it will increase the conduction area between the pressure relief hole 1201 and the packaging box 1 and compress the 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 in the packaging box 1, thereby preventing the high-pressure environment from affecting the stability of the lithium battery module.

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

[0060] In another embodiment of the present invention, the connection structure includes a connection column 101 installed on the packaging box body 1; two groups of symmetrically arranged limit blocks 103 are installed on the connection column 101; a shrinkage seam 102 is arranged between the two groups of limit blocks 103; and a limit groove 202 is opened on the cover plate 2.

[0061] Taking the embodiment combining all the features recorded in this application as an example, when using, when installing the cover plate 2, first align the connecting column 101 and the limiting groove 202; then press the cover plate 2 to make the limiting block 103 pass through the limiting groove 202; because the maximum distance between the two limiting blocks 103 is greater than the aperture of the limiting groove 202, and the side of the limiting block 103 close to 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, so as to get closer to each other, so that the gap of the contraction seam 102 becomes smaller. After the limiting block 103 completely passes through the limiting groove 202, under the action of the elastic force of the limiting block 103 itself, the limiting block 103 will be elastically reset, and the gap of the contraction seam 102 will also be restored. At this time, the limiting block 103 and the cover plate 2 are mutually engaged, so that the cover plate 2 and the packaging box 1 are connected together.

[0062] The fixing plate 9 and the partition plate 3 are connected by a snap-on structure, thereby providing 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, and frequent replacement of installation tools and repeated tightening actions are avoided. The installation efficiency can be effectively improved, and the packaging box 1 can be prevented from being damaged due to incorrect installation of connecting parts.

[0063] In another embodiment of the present invention, a notch is formed on the limiting block 103 for releasing the limiting state of the connection structure.

[0064] Taking the embodiment combining all the features described in the present application as an example, when the lithium battery module in the packaging box 1 needs to be repaired and maintained, a specific tool is used to clamp the two limit blocks 103 through the grooves 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] Since multiple connection structures are provided and the cover plate 2 can be pulled out from the packaging box body 1 only when the multiple connection structures are released from the restricted state simultaneously, the user cannot easily disassemble the packaging box, thereby avoiding the occurrence of safety accidents.

[0066] In another embodiment of the present invention, a protrusion for increasing strength is installed on the packaging box body 1.

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

[0068] A method for packaging a lithium battery module using the packaging box structure of the fully sealed assembled lithium battery module as described above; comprising the following steps: Step 1: Install the lithium battery module: stably 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 module 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 module; Step 2: Install the fixing plate 9: Connect the fixing plate 9 and the partition 3 together through the snap-fit ​​structure. During the connection process, a heat conducting plate 1001 contacts the lithium battery module. As the connection proceeds, the slide bar 10 close to the battery compartment 16 moves away from the battery compartment 16 and drives 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 approach 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 contacts another heat conducting plate 1001 and drives the heat conducting plate 1001 to approach the battery compartment 16 to compress the second buffer spring 11; Step 4: Check the connection stability; use the inspection device to check the air tightness and connection strength of the packaging box.

[0069] It will be apparent to those skilled in the art that the 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 the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0070] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes 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 arranged on the packaging box body (1); It is characterized in that A connection structure is provided between the packaging box body (1) and the cover plate (2), and the connection structure is capable of limiting the displacement of the cover plate (2); The packaging box (1) is installed with a plurality of partitions (3); the plurality of partitions (3) cooperate with each other to divide the packaging box (1) into a plurality of battery compartments (16); the partitions (3) are provided with a plurality of engaging grooves (301); A locking structure is provided in the battery compartment (16), the locking structure comprising a clamping block (701) slidably engaged in the engaging groove (301); when the lithium battery module is installed in 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 body (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 plate (3) are connected via a clamping structure.

2. The packaging box structure of a fully sealed assembled lithium battery module according to claim 1, characterized in that: The locking structure also includes a bottom plate (4) slidably mounted in the battery compartment (16); the two ends of the bottom plate (4) are slidably engaged with the partition (3); a slide groove (302) is provided on the partition (3); a first wedge block (5) is slidably mounted in the slide groove (302); a second wedge block (6) is slidably arranged in the partition (3); one end of the first wedge block (5) abuts against the bottom plate (4), and the other end thereof abuts against one end of the second wedge block (6); a first buffer spring (8) is arranged in the first wedge block (5); the two ends of the first buffer spring (8) abut against the first wedge block (5) and the packaging box (1); a slide plate (7) fixedly connected to the clamping block (701) is slidably mounted in the partition (3); the other end of the second wedge block (6) abuts against the slide plate (7).

3. The packaging box structure of a fully sealed assembled lithium battery module according to claim 2, characterized in that: The clamping structure comprises a plurality of groups of clamping blocks (303) mounted on the partition (3); gaps exist between the plurality of groups of clamping blocks (303); a clamping slot (901) is provided on the fixing plate (9); a plurality of groups of chimeric blocks (902) are mounted on the clamping slot (901); and gaps exist between the plurality of groups of chimeric blocks (902).

4. The packaging box structure of a fully sealed assembled lithium battery module according to claim 3, characterized in that: The buffer structure comprises a sleeve column (903) mounted on the fixing plate (9), and two ends of the sleeve column (903) are slidably engaged with sliding rods (10) symmetrically arranged; a heat conducting plate (1001) is installed on the sliding rod (10); a second buffer spring (11) is arranged in the sleeve column (903); and two ends of the second buffer spring (11) respectively contact the two sliding rods (10).

5. The packaging box structure of a fully sealed assembled lithium battery module according to claim 4, characterized in that: The heat conduction plate (1001) has a high thermal conductivity coefficient; and a plurality of groups of heat conduction fins (201) are installed on the cover plate (2).

6. The packaging box structure of a fully sealed assembled lithium battery module according to claim 5, characterized in that: A pressure relief valve body (12) is installed on the packaging box body (1); a guide rod (13) is installed in the pressure relief valve body (12), and a piston (14) is slidably engaged on the guide rod (13); and the piston (14) is slidably sealed and connected to the pressure relief valve body (12); a return spring (15) is wrapped around the guide rod (13); two ends of the return spring (15) are respectively in contact with the piston (14) and the pressure relief valve body (12); and a plurality of groups of pressure relief holes (1201) are provided on the pressure relief valve body (12).

7. The packaging box structure of a fully sealed assembled lithium battery module according to claim 6, characterized in that: The connection structure comprises a connection column (101) mounted on the packaging box body (1); two groups of symmetrically arranged limit blocks (103) are mounted on the connection column (101); a contraction seam (102) is arranged between the two groups of limit blocks (103); and a limit groove (202) is provided on the cover plate (2).

8. The packaging box structure of a fully sealed assembled lithium battery module according to claim 7, characterized in that: The limiting block (103) is provided with a notch for releasing the limiting state of the connection structure.

9. The packaging box structure of a fully sealed assembled lithium battery module according to claim 1, characterized in that: The packaging box body (1) is provided with a protrusion for increasing strength.

10. A method for packaging a lithium battery module using the packaging box structure of the fully sealed assembled lithium battery module according to any one of claims 1 to 9; characterized in that: The steps include: Step 1: Installing the lithium battery module: stably install the packaging box (1) on a workbench, and simultaneously install multiple lithium battery modules in the battery compartment (16). During the installation process, the gravity of the lithium battery module 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 (3) together through a snap-fit ​​structure. During the connection process, a heat conducting plate (1001) contacts the lithium battery module. As the connection progresses, the slide bar (10) close to the battery compartment (16) moves away from the battery compartment (16) and drives 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) approach 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) contacts another heat conducting plate (1001) and drives the heat conducting plate (1001) to approach the battery compartment (16) to compress the second buffer spring (11); Step 4: Check the connection stability; use the inspection device to check the air tightness and connection strength of the packaging box.

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