Lithium ion battery box

Abstract

A lithium ion battery box comprises a battery pack and a battery box body, the battery box body comprises two first side walls and two second side walls, the first side walls and the second side walls define a cavity structure with two open ends, the battery pack is contained in the cavity structure, the two first side walls are oppositely arranged in the first direction, and the two second side walls are oppositely arranged in the second direction. The two second side walls are oppositely arranged in the second direction, the first direction is perpendicular to the second direction, the cover plate is used for covering an opening in one end of the cavity structure, the sides, facing the cover plate, of the first side walls and the second side walls are each provided with a flange edge, the cover plate is fixedly installed on the flange edges through fasteners, and the fasteners penetrate through the cover plate and the flange edges; the bottom wall blocks the opening in the other end of the cavity structure, and the battery pack is arranged on the bottom wall; and the flange edge extends towards one side far away from the cavity structure. According to the invention, the battery box and the cover body can be connected through the detachable and reusable fastener, so that the stability of the connection between the battery box and the cover body is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium batteries, in particular to a lithium ion battery box. Background Art

[0002] With the continuous development of the new energy vehicle industry, the requirements for battery safety and endurance of new energy vehicles are also increasing. As the storage unit of the power battery, the battery box has a reasonable battery box structure that plays a vital role in the energy density and safety performance of the battery pack. Common battery boxes are generally enclosed by an upper cover and a lower box to form a storage space for installing batteries. The upper cover and the lower box are generally fixed with self-tapping rivets or a simple clamping structure.

[0003] Then when self-tapping rivets are used for fixing, general self-tapping screws are directly threaded and fixed with the threaded holes on the upper cover and the lower box body. Once too much force is used when screwing in the self-tapping screws or the screws are screwed in and out multiple times, the threads on the self-tapping screws and the threaded holes on the upper cover and the lower box body are prone to stripping. If the self-tapping screws are stripped, only the self-tapping screws need to be replaced. If stripping occurs on the threaded holes on the upper cover and the lower box body, the connection between the upper cover and the lower box body here will become loose, resulting in failure of the connection between the upper cover and the lower box body, affecting the sealing of the battery pack, and easily causing dust and other impurities to invade the battery pack, affecting battery performance and safety.

[0004] When the upper cover and the lower box are fixed by a snap-fit ​​structure, the existing snap-fit ​​structure generally directly uses the two ends of the buckle to snap onto the upper cover and the lower box respectively. When the fixation between the upper cover and the lower box needs to be released, the buckle needs to be destroyed and removed by a tool. If it needs to be re-fixed, a new buckle needs to be inserted. On the one hand, when removing the buckle, a disassembly tool is generally used for violent disassembly, which is easy to damage the upper cover or the lower box and affect the sealing of the battery pack. On the other hand, the damaged buckle cannot be reused, resulting in waste of materials. Summary of the invention

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a lithium-ion battery box, which solves the problem that when the upper cover and the lower box body are fixed with self-tapping rivets or a simple clip-on structure in the prior art, the connection between the upper cover and the lower box body is easily failed, affecting the sealing of the battery pack, or the buckles that are violently disassembled cannot be reused, resulting in waste of materials.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] A lithium-ion battery box, comprising:

[0008] Battery pack;

[0009] A battery box, the battery box comprising a first side wall and a second side wall, the first side wall and the second side wall together form a cavity structure with openings at both ends, the battery pack is accommodated in the cavity structure, there are two first side walls, the two first side walls are arranged opposite to each other along a first direction, there are two second side walls, the two second side walls are arranged opposite to each other along a second direction, and the first direction is perpendicular to the second direction;

[0010] A cover plate, the cover plate is used to cover an opening at one end of the cavity structure, the first side wall and the second side wall are both provided with a flange edge on one side facing the cover plate, the cover plate is fixedly mounted on the flange edge by a fastener, and the fastener passes through the cover plate and the flange edge;

[0011] A bottom wall, the bottom wall blocks the other end opening of the cavity structure, and the battery pack is arranged on the bottom wall;

[0012] The flange edge extends toward a side away from the cavity structure.

[0013] Furthermore, the fastener comprises a fastening bolt and a clamping sleeve;

[0014] A plurality of fixing holes are evenly provided on the flange edges of the first side wall and the second side wall, and a plurality of mounting holes matching the fixing holes are evenly provided on the edge of the cover plate;

[0015] The clamping sleeve is provided with a first clamping portion at one end and a second clamping portion at the other end, one end of the clamping sleeve provided with the second clamping portion passes through the mounting hole and the fixing hole, and the first clamping portion is clamped to the upper surface of the cover plate;

[0016] A threaded hole matched with the fastening bolt is also provided in the middle of the clamping sleeve, and the fastening bolt is threadedly connected in the threaded hole. When the fastening bolt is embedded in the threaded hole, the lower end of the second clamping portion is clamped on the lower surface of the flange edge.

[0017] Furthermore, one end of the clamping sleeve on which the second clamping part is provided is provided with a plurality of installation slots evenly arranged along its circumference, the second clamping part is installed in the installation slots through a pin shaft, and the second clamping part can rotate freely along the pin shaft;

[0018] The second clamping portion includes a first section, the first section is installed in the installation slot through the pin shaft, a second section is provided at one end of the first section facing the first clamping portion, the second section is provided at one end away from the wall surface of the clamping sleeve, and a gap is provided between the second section and the wall surface of the clamping sleeve;

[0019] A circle of first section body is arranged at one end of the fastening bolt facing the clamping sleeve, and the first section body is a hollow cylindrical structure. A circle of guiding structure is arranged at one end of the first section body away from the fastening bolt, and when the fastening bolt is driven into the threaded hole, the guiding structure can drive the second clamping part to rotate along the pin shaft.

[0020] Furthermore, the guide structure is a wedge-shaped structure that gradually widens from an end away from the fastening bolt to an end close to the fastening bolt.

[0021] Furthermore, the wedge surface of the wedge-shaped structure is a smooth curve.

[0022] Furthermore, the gap between the second section and the wall of the clamping sleeve is h, the width of the bottom of the guide structure is d, and the width d of the bottom of the guide structure is smaller than the gap h between the second section and the wall of the clamping sleeve.

[0023] Furthermore, a liquid cooling pipe is arranged in the bottom wall, and a liquid cooling inlet and a liquid cooling outlet are arranged at one end of the bottom wall. The liquid cooling inlet is connected with one end of the liquid cooling pipe, and the liquid cooling outlet is connected with the other end of the liquid cooling pipe. Both the liquid cooling inlet and the liquid cooling outlet are connected with the liquid cooling tank, and the coolant in the liquid cooling tank is passed into the liquid cooling pipe through the liquid cooling inlet, and circulates back to the liquid cooling tank through the liquid cooling outlet.

[0024] Furthermore, the first section and the second section are integrally formed.

[0025] Furthermore, the first section and the guide structure are integrally formed with the fastening bolt.

[0026] Furthermore, a sealing portion is provided between the cover plate and the flange edge.

[0027] The beneficial effects of the present invention are as follows:

[0028] 1) The present invention fixes the cover plate and the battery case by means of a fastener consisting of a fastening bolt and a snap-fit ​​sleeve. When fixing, the snap-fit ​​sleeve is embedded in the mounting holes and fixing holes on the cover plate and the battery case, and then the fastening bolt is driven into the threaded hole on the snap-fit ​​sleeve to complete the fixation between the cover plate and the battery case. In the present invention, the fastening bolt is not directly threaded with the cover plate and the battery case. Even if the fastening bolt or the threaded hole is stripped, only the fastening bolt or the snap-fit ​​sleeve needs to be replaced, and irreversible damage will not be caused directly to the cover plate and the battery case. The stability of the connection between the cover plate and the battery case is ensured, the sealing of the battery pack is improved, the risk of dust and other impurities entering the battery pack is reduced, and the performance and safety of the battery pack are improved.

[0029] 2) The present invention uses a fastener consisting of a fastening bolt and a clamping sleeve to fix the cover plate and the battery case. When the cover plate and the battery case need to be released, the fastening bolt only needs to be withdrawn from the threaded hole on the clamping sleeve. At this time, the second clamping portion can be rotated along the pin shaft to be flush with the clamping sleeve due to the action of gravity, and then the clamping sleeve can be taken out from the mounting through hole and the fixing hole on the cover plate and the battery case. When releasing the fixation between the cover plate and the battery case, the present invention does not need to violently destroy the buckle, and the fastening bolts and clamping sleeves after removal can be reused to reduce material waste. At the same time, the structure can also reduce damage to the cover plate and the battery case during the removal process, further protect the cover plate and the battery case, improve the sealing of the battery pack, reduce the risk of dust and other impurities entering the battery pack, and improve the performance and safety of the battery pack;

[0030] 3) The wedge surface of the guide structure at the bottom of the fastening bolt in the present invention is a smooth curve. When the fastening bolt is driven into the threaded hole, the guide structure and the second section of the second clamping part are in smooth transition, which reduces the force between the second section and the guide structure during the rotation of the second clamping part along the pin shaft, and reduces the wear of the second section and the guide structure;

[0031] 4) The width d of the bottom of the guide structure in the present invention is smaller than the gap h between the second section and the wall of the clamping sleeve. When the fastening bolt is driven into the threaded hole on the clamping sleeve, the bottom of the guide structure can be embedded in the gap between the second section and the wall of the clamping sleeve during the process of driving the fastening bolt. As the fastening bolt is continuously driven into the wedge surface of the guide structure, the second clamping part can be driven to rotate along the pin until the first section is turned toward the outside of the clamping sleeve and clamped to the lower end face of the flange edge of the side wall. The size design of the gap between the bottom of the guide structure and the second section and the wall of the clamping sleeve in the present invention can prevent the fastening bolt from interfering with the second clamping part and damaging the fastening structure during the process of driving the fastening bolt into the threaded hole, thereby ensuring the stability of the entire fastening structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the structure in which the battery pack of the present invention is installed in the battery box;

[0033] Figure 2 It is a schematic diagram of the structure in which the cover plate is fixed on the battery box in the present invention;

[0034] Figure 3 An exploded view of the battery box and the cover plate in the present invention;

[0035] Figure 4 It is a structural schematic diagram of the fastening structure in the present invention;

[0036] Figure 5 It is a structural schematic diagram of the fastening structure in the present invention when the battery box and the cover are fixed;

[0037] Figure 6 It is a structural schematic diagram of the clamping sleeve in the present invention;

[0038] In the figure: 1. battery pack; 2. battery case; 21. first side wall; 22. second side wall; 3. cover plate; 4. flange edge; 5. fastener; 51. fastening bolt; 511. first section; 512. guide structure; 52. snap-fit ​​sleeve; 521. first snap-fit ​​part; 522. second snap-fit ​​part; 5221. first section; 5222. second section; 6. bottom wall; 7. fixing hole; 8. mounting hole; 9. threaded hole; 11. mounting notch; 12. pin shaft; 13. liquid cooling inlet; 14. liquid cooling outlet; 15. sealing part. DETAILED DESCRIPTION

[0039] The present invention will be further described in detail below in conjunction with the accompanying drawings. Specific embodiments

[0040] like Figure 1-6 As shown, a lithium-ion battery box, a battery pack 1; a battery box body 2, the battery box body 2 includes a first side wall 21 and a second side wall 22, the first side wall 21 and the second side wall 22 together form a cavity structure with openings at both ends, the battery pack 1 is accommodated in the cavity structure, there are two first side walls 21, the two first side walls 21 are arranged opposite to each other along a first direction, there are two second side walls 22, the two second side walls 22 are arranged opposite to each other along a second direction, and the first direction is perpendicular to the second direction; a cover plate 3, the cover plate 3 is used to cover an opening at one end of the cavity structure, the first side wall 21 and the second side wall 22 are both provided with a flange edge 4 on the side facing the cover plate 3, the cover plate 3 is fixedly installed on the flange edge 4 by a fastener 5, and the fastener 5 passes through the cover plate 3 and the flange edge 4; a bottom wall 6, the bottom wall 6 blocks the other end opening of the cavity structure, and the battery pack 1 is arranged on the bottom wall 6; the flange edge 4 extends toward the side away from the cavity structure.

[0041] The fastener 5 includes a fastening bolt 51 and a clamping sleeve 52; a plurality of fixing holes 7 are evenly provided on the flange edges 4 of the first side wall 21 and the second side wall 22, and a plurality of mounting holes 8 matching the fixing holes 7 are also evenly provided on the edge of the cover plate 3; a first clamping portion 521 is provided at one end of the clamping sleeve 52, and a second clamping portion 522 is provided at the other end, and one end of the second clamping portion 522 of the clamping sleeve 52 passes through the mounting holes 8 and the fixing holes 7, and the first clamping portion 521 is clamped on the upper surface of the cover plate 3; a threaded hole 9 matching the fastening bolt 51 is also provided in the middle of the clamping sleeve 52, and the fastening bolt 51 is threadedly connected in the threaded hole 9, and when the fastening bolt 51 is embedded in the threaded hole 9, the second clamping portion 522 is clamped on the lower surface of the flange edge 4.

[0042] The second clamping portion 522 is provided at one end of the clamping sleeve 52 and is evenly provided with a plurality of mounting notches 11 along its circumference. The second clamping portion 522 is installed in the mounting notch 11 through a pin shaft 12. The second clamping portion 522 can rotate freely along the pin shaft 12. The second clamping portion 522 includes a first section 5221, which is installed in the mounting notch 11 through the pin shaft 12. The first section 5221 is provided with a second section 5222 toward one end of the first clamping portion 521. The second section 5222 is provided at one end of the first clamping portion 521. 222 is arranged at one end away from the wall of the clamping sleeve 52, and there is a gap between the second section 5222 and the wall of the clamping sleeve 52; the end of the fastening bolt 51 facing the clamping sleeve 52 is provided with a circle of first section 511, the first section 511 is a hollow cylindrical structure, and the end of the first section 511 away from the fastening bolt 51 is provided with a circle of guide structure 512, when the fastening bolt 51 is driven into the threaded hole 9, the guide structure 512 can drive the second clamping portion 522 to rotate along the pin shaft 12. The guide structure 512 is a wedge-shaped structure that gradually widens from the end away from the fastening bolt 51 to the end close to the fastening bolt 51.

[0043] The gap between the second section 5222 and the wall of the clamping sleeve 52 is h, the width of the bottom of the guide structure 512 is d, and the width d of the bottom of the guide structure 512 is smaller than the gap h between the second section 5222 and the wall of the clamping sleeve 52.

[0044] In this embodiment, when fixing the battery case 2 and the cover plate 3, the battery pack 1 is fixedly installed on the bottom wall 6 of the bottom of the battery case 2, and then the cover plate 3 is covered on the battery case 2. When the cover plate 3 is covered on the battery case 2, the mounting holes 8 on the cover 3 are aligned one by one with the fixing holes 7 on the flange edge 4, and then the fasteners 5 are driven into the mounting holes 8 and the fixing holes 7.

[0045] When the fastener 5 is used to fix the battery box 2 and the cover plate 3, the snap-fit ​​sleeve 52 is first aligned and inserted into the mounting hole 8 and the fixing hole 7. When the snap-fit ​​sleeve 52 is inserted into the mounting hole 8 and the fixing hole 7, the first snap-fit ​​portion 521 is tightly attached to the upper end surface of the cover plate 3, and the bottom ends of the first sections 5221 of the snap-fit ​​sleeve 52 and the second snap-fit ​​portion 522 both penetrate through the flange edge 4.

[0046] After the clamping sleeve 52 is inserted into the installation through hole 8 and the fixing hole 7, the fastening bolt 51 is driven into the threaded hole 9 on the clamping sleeve 52. When the guide structure 512 of the fastening bolt 51 is embedded in the gap between the second section 5222 and the wall surface of the clamping sleeve 52, as the fastening bolt 51 is continuously driven in, the guide structure 512 is a wedge-shaped structure that gradually widens from the end away from the fastening bolt 51 to the end close to the fastening bolt 51 toward the end of the first section 5221. The guide structure 512 can drive the second clamping portion 522 to rotate along the pin shaft 12. When the fastening bolt 51 is completely driven into the threaded hole 9, the second clamping portion 522 rotates along the pin shaft 12 until the first section 5221 is tightly clamped on the lower surface of the flange edge 4. At this time, the first clamping portion 521 is clamped on the upper end surface of the cover plate 3, and the first section 5221 of the second clamping portion 522 is tightly clamped on the lower surface of the flange edge 4, completing the clamping between the cover plate 3 and the battery box 2. Specific embodiments

[0047] The difference between this embodiment and specific embodiment 1 is that the wedge surface of the wedge-shaped structure is a smooth curve.

[0048] In this embodiment, the wedge surface of the guide structure 512 at the bottom of the fastening bolt 51 is a smooth curve. During the process of driving the fastening bolt 51 into the threaded hole 9, the guide structure 512 and the second section 5222 of the second clamping portion 522 have a smooth transition, thereby reducing the force between the second section 5222 and the guide structure 512 during the rotation of the second clamping portion 522 along the pin shaft 12, thereby reducing the wear of the second section 5222 and the guide structure 512. Specific embodiments

[0049] In order to further improve the heat dissipation performance of the entire battery pack, a liquid cooling pipe is further provided in the bottom wall 6 in the present embodiment, and a liquid cooling inlet 13 and a liquid cooling outlet 14 are provided at one end of the bottom wall 6, the liquid cooling inlet 13 is connected with one end of the liquid cooling pipe, and the liquid cooling outlet 14 is connected with the other end of the liquid cooling pipe, and the liquid cooling inlet 13 and the liquid cooling outlet 14 are both connected with a liquid cooling tank, and the coolant in the liquid cooling tank is passed into the liquid cooling pipe through the liquid cooling inlet 13, and circulates back to the liquid cooling tank through the liquid cooling outlet 14, thereby completing the liquid cooling cycle of the coolant and improving the heat dissipation performance of the battery pack. Specific embodiments

[0050] The difference between this embodiment and the specific embodiment 1 is that the first section 5221 and the second section 5222 are integrally formed, and the first section body 511 and the guide structure 512 are integrally formed with the fastening bolt 51 .

[0051] In this embodiment, the second clamping portion 522 and the fastening bolt 51 are manufactured by an integral injection molding process, thereby ensuring the strength of the second clamping portion 522 and the fastening bolt 51 and improving the stability of the connection structure between the cover plate 3 and the battery box 2 . Specific embodiments

[0052] In order to further ensure the sealing between the cover plate 3 and the battery box 2 , a circle of sealing portion 15 is provided between the cover plate 3 and the flange edge 4 .

[0053] In summary, the present invention fixes the cover plate 3 and the battery case 2 by means of a fastener 5 consisting of a fastening bolt 51 and a clamping sleeve 52. When fixing, the clamping sleeve 52 is embedded in the mounting through hole 8 and the fixing hole 7 on the cover plate 3 and the battery case 2, and then the fastening bolt 51 is driven into the threaded hole 9 on the clamping sleeve 52, thereby completing the fixation between the cover plate 3 and the battery case 2. In the present invention, the fastening bolt 51 is not directly threadedly fixed with the cover plate 3 and the battery case 2. Even if the fastening bolt 51 or the threaded hole 9 is stripped, it is only necessary to replace the fastening bolt 51 or the clamping sleeve 52, and no irreversible damage will be caused to the cover plate 3 and the battery case 2. The stability of the connection between the cover plate 3 and the battery case 2 is ensured, the sealing of the battery pack is improved, the risk of dust and other impurities entering the battery pack is reduced, and the performance and safety of the battery pack are improved. The fastener 5 composed of the fastening bolt 51 and the clamping sleeve 51 of the present invention fixes the cover plate 3 and the battery case 2. When it is necessary to release the fixation between the cover plate 3 and the battery case 2, it is only necessary to withdraw the fastening bolt 51 from the threaded hole 9 on the clamping sleeve 52. At this time, the second clamping portion 522 can be rotated along the pin shaft 12 due to gravity until it is flush with the clamping sleeve 52, and then the clamping sleeve 52 can be taken out from the mounting through hole 8 and the fixing hole 7 on the cover plate 3 and the battery case 2. In the present invention, when releasing the fixation between the cover plate 3 and the battery box body 2, it is not necessary to violently destroy the buckle, and the removed fastening bolts 51 and the clamping sleeve 52 can be reused, thereby reducing the waste of materials. At the same time, this structure can also reduce the damage to the cover plate 3 and the battery box 2 during the removal process, further protect the cover plate and the battery box, improve the sealing of the battery pack, reduce the risk of dust and other impurities entering the battery pack, and improve the performance and safety of the battery pack; in the present invention, the width d of the bottom of the guide structure 512 is smaller than the gap h between the second section 5222 and the wall surface of the clamping sleeve 52. When the fastening bolt 51 is driven into the threaded hole 9 on the clamping sleeve 52, the bottom of the guide structure 512 can be embedded in the gap between the second section 5222 and the wall surface of the clamping sleeve 52 during the process of driving the fastening bolt 51. As the fastening bolt 51 is continuously driven into the wedge surface of the guide structure 512, the second clamping portion 522 can be driven to rotate along the pin shaft 12 until the first section 5221 is flipped toward the outside of the clamping sleeve 52 and clamped to the lower end surface of the flange edge 4 of the side wall. The size design of the gap between the bottom of the guide structure 512 and the wall surface of the second section 5222 and the clamping sleeve 52 in the present invention can prevent the fastening bolt 51 from interfering with the second clamping portion 522 and damaging the fastening structure during the process of driving the fastening bolt 51 into the threaded hole 9, thereby ensuring the stability of the entire fastening structure.

[0054] The above-mentioned implementation modes are for explanation of the present invention rather than limitation of the present invention. It can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A lithium-ion battery box, characterized in that: include: Battery pack; A battery box, the battery box comprising a first side wall and a second side wall, the first side wall and the second side wall together form a cavity structure with openings at both ends, the battery pack is accommodated in the cavity structure, there are two first side walls, the two first side walls are arranged opposite to each other along a first direction, there are two second side walls, the two second side walls are arranged opposite to each other along a second direction, and the first direction is perpendicular to the second direction; A cover plate, the cover plate is used to cover an opening at one end of the cavity structure, the first side wall and the second side wall are both provided with a flange edge on one side facing the cover plate, the cover plate is fixedly mounted on the flange edge by a fastener, and the fastener passes through the cover plate and the flange edge; A bottom wall, the bottom wall blocks the other end opening of the cavity structure, and the battery pack is arranged on the bottom wall; The flange edge extends toward a side away from the cavity structure.

2. A lithium-ion battery box according to claim 1, characterized in that: The fastener comprises a fastening bolt and a clamping sleeve; A plurality of fixing holes are evenly provided on the flange edges of the first side wall and the second side wall, and a plurality of mounting holes matching the fixing holes are evenly provided on the edge of the cover plate; The clamping sleeve is provided with a first clamping portion at one end and a second clamping portion at the other end, one end of the clamping sleeve provided with the second clamping portion passes through the mounting hole and the fixing hole, and the first clamping portion is clamped to the upper surface of the cover plate; A threaded hole matched with the fastening bolt is also provided in the middle of the clamping sleeve. The fastening bolt is threadedly connected in the threaded hole. The lower end of the second clamping portion is clamped on the lower surface of the flange edge.

3. A lithium-ion battery box according to claim 2, characterized in that: One end of the clamping sleeve provided with the second clamping part is provided with a plurality of installation slots evenly arranged along its circumference, the second clamping part is installed in the installation slots through a pin shaft, and the second clamping part can rotate freely along the pin shaft; The second clamping portion includes a first section, the first section is installed in the installation slot through the pin shaft, a second section is provided at one end of the first section facing the first clamping portion, the second section is provided at one end away from the wall surface of the clamping sleeve, and a gap is provided between the second section and the wall surface of the clamping sleeve; The end of the fastening bolt facing the clamping sleeve is provided with a circle of first section body, the first section body is a hollow cylindrical structure, and the end of the first section body away from the fastening bolt is provided with a circle of guiding structure, and the guiding structure can drive the second clamping part to rotate along the pin shaft.

4. A lithium-ion battery box according to claim 3, characterized in that: The guide structure is a wedge-shaped structure that gradually widens from an end away from the fastening bolt to an end close to the fastening bolt.

5. A lithium-ion battery box according to claim 4, characterized in that: The wedge surface of the wedge-shaped structure is a smooth curve.

6. A lithium-ion battery box according to claim 5, characterized in that: The gap between the second section and the wall of the clamping sleeve is h, the width of the bottom of the guide structure is d, and the width d of the bottom of the guide structure is smaller than the gap h between the second section and the wall of the clamping sleeve.

7. A lithium-ion battery box according to any one of claims 3 to 6, characterized in that: A liquid cooling pipe is arranged in the bottom wall, and a liquid cooling inlet and a liquid cooling outlet are arranged at one end of the bottom wall. The liquid cooling inlet is connected with one end of the liquid cooling pipe, and the liquid cooling outlet is connected with the other end of the liquid cooling pipe. Both the liquid cooling inlet and the liquid cooling outlet are connected with the liquid cooling tank. The coolant in the liquid cooling tank is passed into the liquid cooling pipe through the liquid cooling inlet, and circulates back to the liquid cooling tank through the liquid cooling outlet.

8. A lithium-ion battery box according to any one of claims 3 to 6, characterized in that: The first section and the second section are integrally formed.

9. A lithium-ion battery box according to any one of claims 3 to 6, characterized in that: The first section body and the guide structure are integrally formed with the fastening bolt.

10. A lithium-ion battery box according to any one of claims 3 to 6, characterized in that: A sealing portion is arranged between the cover plate and the flange edge.

Images