Lithium battery high-temperature protection structure

Abstract

The utility model relates to the field of lithium battery protection, in particular to a lithium battery high-temperature protection structure which comprises a protection box, a placement plate, a fixing assembly, a ventilation pipe and a fan, the placement plate is arranged in the protection box, and the fixing assembly is arranged between the placement plate and the bottom of the protection box; the ventilation pipe is arranged in the protection box and located above the placement plate, the ventilation pipe and the placement plate are arranged at an interval, the ventilation pipe communicates with the outer walls of the two ends of the protection box, multiple pairs of flow guide plates are arranged on the inner side wall of the ventilation pipe, the fan is fixedly arranged at the end of the ventilation pipe, and the effect that mechanical heat accumulation generated during working of the lithium battery and damage to the lithium battery are avoided is achieved.

Description

Technical Field

[0001] The present application relates to the field of lithium battery protection, and in particular to a high-temperature protection structure for lithium batteries. Background Art

[0002] Lithium batteries are secondary batteries, also known as rechargeable lithium batteries. They store and release electrical energy through the movement of lithium ions between positive and negative electrodes. Their high energy density, long cycle life, and lightweight nature make them widely used in mobile electronic devices, electric vehicles, and energy storage systems.

[0003] Existing lithium batteries are composed of a positive electrode, a negative electrode, an electrolyte and a separator. Lithium batteries are composed of multiple cells and are wrapped and fixed with insulating materials. The positive electrode of a lithium battery is usually made of a lithium compound, and the negative electrode is made of a carbon material. In order to protect the battery cell, the insulating material used is relatively thick.

[0004] The above-mentioned existing technical solutions have the following defects: the lithium battery structure is relatively simple, the insulating material wrapping the lithium battery has poor heat dissipation, and it is very easy to become flammable and explosive when subjected to external impact, which greatly increases the danger of the lithium battery. In addition, during use, the mechanical heat generated by the lithium battery is high, and its heat dissipation is poor. Utility Model Content

[0005] In order to avoid mechanical heat accumulation generated by the operation of the lithium battery and damage to the lithium battery, the present application provides a high-temperature protection structure for the lithium battery.

[0006] The above technical objectives of this application are achieved through the following technical solutions:

[0007] A lithium battery high-temperature protection structure includes a protection box, a placement plate, a fixing assembly, a ventilation duct and a fan. The placement plate is arranged in the protection box, the fixing assembly is arranged between the placement plate and the bottom of the protection box, the ventilation duct is arranged in the protection box above the placement plate and spaced apart from the placement plate, the ventilation duct is connected to the outer walls of the protection box at both ends, multiple pairs of guide plates are arranged on the inner wall of the ventilation duct, and the fan is fixedly arranged at the end of the ventilation duct.

[0008] By adopting the above technical solution, by setting up a protective box, a placement plate, a fixing component, a ventilation pipe and a fan, the protective box can protect multiple groups of lithium batteries placed in the box to prevent the lithium batteries from being damaged by bumps. The placement plate is used to place multiple groups of lithium batteries in the protective box, and the fixing component clamps and fixes the multiple groups of lithium batteries in the protective box, thereby improving the safety of the lithium batteries placed in the protective box. The ventilation pipe and the fan can dissipate heat for the multiple groups of lithium batteries set in the protective box, thereby preventing the mechanical heat generated by the operation of the lithium batteries from accumulating in the protective box and causing damage to the lithium batteries.

[0009] Optionally, the fixing assembly includes a guide rod, a sleeve, a first connecting rod, a second connecting rod, a clamping plate, a transmission structure and an electric push rod. The guide rod is fixed to the bottom of the protective box, the sleeve is slidably mounted on the guide rod, the first connecting rod is fixed to the side wall of the sleeve, one end of the second connecting rod is fixed to the upper surface of the sleeve, and the other end passes through the placement plate and is fixed to the side wall of the clamping plate. The transmission structure is rotatably arranged between the bottom of the protective box and the placement plate, the transmission structure is fixed to the first connecting rod, the electric push rod is fixed to the bottom of the protective box, and the push rod of the electric push rod is fixed to the side wall of the sleeve.

[0010] By adopting the above-mentioned technical solution, by setting a guide rod, a sleeve, a first connecting rod, a second connecting rod, a clamping plate, a transmission structure and an electric push rod, the electric push rod can push the first connecting rod, and the clamping plate is driven by the second connecting rod and the transmission mechanism to clamp and fix multiple groups of lithium batteries in the protective box, thereby avoiding collision between the lithium batteries and the protective box and improving the safety of the lithium batteries placed in the protective box.

[0011] Optionally, the transmission structure includes a rotating shaft, a rotating plate and a rotating connecting rod, the rotating shaft is fixedly connected to the bottom of the protective box, the rotating plate is fixedly sleeved on the rotating shaft and spaced apart from the bottom of the protective box, one end of the rotating connecting rod is fixedly connected to the end of the rotating plate surface, and the other end is fixedly connected to the side wall of the first connecting rod.

[0012] By adopting the above technical solution, by setting a rotating shaft, a rotating plate and a rotating connecting rod, the clamping plate can be driven to clamp and fix multiple groups of lithium batteries, avoiding collision between the lithium batteries and the protective box, and improving the safety of the lithium batteries placed in the protective box.

[0013] Optionally, heat dissipation holes are provided on two opposite side walls of the protection box.

[0014] By adopting the above technical solution and providing heat dissipation holes, heat can be dissipated when the temperature inside the protective box is too high, thereby preventing the temperature inside the protective box from being too high.

[0015] Optionally, a ventilation hole is provided on the side wall of the ventilation pipe opposite to the side wall of the protection box.

[0016] By adopting the above technical solution, ventilation holes are opened, and the ventilation holes and heat dissipation holes can allow air to circulate, thus preventing the temperature in the protective box from being too high.

[0017] Optionally, a baffle is fixedly connected to the middle part of the ventilation pipe.

[0018] By adopting the above technical solution and arranging the baffle, it is possible to prevent the cooling air flows blown out by the fans at both ends of the ventilation duct from interfering with each other, thereby improving the heat dissipation efficiency.

[0019] Optionally, the guide plates are arc-shaped, and the arc openings of each pair of guide plates are flared, with the flared openings facing the end of the ventilation pipe.

[0020] By adopting the above technical solution, the arc-shaped guide plate can divert and guide the cooling airflow blown out by the fan at the end of the ventilation duct, so that the multiple groups of lithium batteries placed on both sides of the ventilation duct in the protective box can dissipate heat evenly.

[0021] Optionally, the guide plates are provided in multiple pairs, the intervals between the two guide plates in each pair are different, and the intervals between the two guide plates in each pair gradually decrease from the end portion to the middle portion of the ventilation duct.

[0022] By adopting the above technical solution, the guide plates with gradually decreasing intervals can divert the cooling airflow blown out by the fan in a hierarchical manner, so that the multiple groups of lithium batteries arranged on both sides of the ventilation pipe in the protective box can dissipate heat evenly, thereby improving the heat dissipation effect.

[0023] Optionally, the ventilation duct is provided with a guide rail fixedly connected to the outer edge of the side wall of the ventilation duct, and a partition is slidably provided on the guide rail.

[0024] By adopting the above technical solution and arranging guide rails and partitions, gaps can be created between lithium batteries and between lithium batteries and between the side walls of the ventilation pipes, thereby enabling better circulation of cooling air and improving heat dissipation efficiency.

[0025] In summary, this application has the following technical effects:

[0026] 1. The protective box, placement plate, fixing assembly, ventilation duct and fan are provided to protect the multiple lithium battery groups placed in the box and prevent the lithium battery from being damaged by bumps. The placement plate is used to place the multiple lithium battery groups in the protective box, and the fixing assembly clamps and fixes the multiple lithium battery groups in the protective box, improving the safety of the lithium battery placement in the protective box. The ventilation duct and fan can dissipate heat for the multiple lithium battery groups placed in the protective box, preventing the mechanical heat generated by the lithium battery from accumulating in the protective box and causing damage to the lithium battery.

[0027] 2. By setting up a guide plate, the cooling air flow blown out by the fan at the end of the ventilation duct can be diverted and guided, so that the multiple lithium battery groups placed on both sides of the ventilation duct in the protective box can dissipate heat evenly;

[0028] 3. By setting up the guide rails and partitions, gaps can be created between the lithium batteries and between the lithium batteries and the side walls of the ventilation duct, which can better circulate the cooling airflow and improve the heat dissipation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is the appearance structure diagram of this application;

[0030] Figure 2 This is the structure diagram after this application is opened;

[0031] Figure 3 It is a structural diagram of the fixed components of this application;

[0032] Figure 4 It is a prominent structural diagram of the heat dissipation component of this application.

[0033] Explanation of the accompanying drawings: 1. Protection assembly; 11. Protection box; 111. Heat dissipation hole; 12. Movable door; 13. Buckle; 14. Placement plate; 141. Sliding groove; 2. Fixing assembly; 21. Guide rod; 22. Sleeve; 23. First connecting rod; 24. Second connecting rod; 25. Clamping plate; 26. Rotating shaft; 27. Rotating plate; 28. Rotating connecting rod; 29. ​​Electric push rod; 3. Heat dissipation assembly; 31. Ventilation duct; 311. Ventilation hole; 32. Fan; 33. Baffle; 34. Guide plate; 35. Guide rail; 36. Partition. DETAILED DESCRIPTION

[0034] The present application is further described in detail below with reference to the accompanying drawings.

[0035] The present application discloses a high temperature protection structure for a lithium battery. Figure 2 The protective structure includes a protective assembly 1, a fixing assembly 2, and a heat dissipation assembly 3. The protective assembly 1 and the fixing assembly 2 can secure and protect the lithium batteries, preventing collisions between the lithium batteries. The heat dissipation assembly 3 can cool the lithium batteries, preventing mechanical heat generated by the lithium batteries from accumulating in the protective box 11 and causing damage to the lithium batteries.

[0036] Combine Figure 1 and Figure 2 The protective assembly 1 includes a protective box 11, a movable door 12, a buckle 13 and a placement plate 14. The protective box 11 is provided with a box opening and the box opening is arranged upward. A number of heat dissipation holes 111 are provided on the two opposite side walls of the protective box 11. The movable door 12 is arranged at the box opening of the protective box 11 by rotating through a hinge. The hinge is installed on the side wall of the protective box 11 adjacent to the box opening. The buckle 13 is fixed to the side wall of the protective box 11 opposite to the hinge. The movable door 12 is fixed to the box opening of the protective box 11 by the buckle 13. The placement plate 14 is arranged in the protective box 11. The placement plate 14 is spaced apart from the bottom of the protective box 11 and the surface of the placement plate 14 is parallel to the bottom of the box.

[0037] Combine Figure 2 and Figure 3The fixing component 2 includes a guide rod 21, which is arranged in the protective box 11 between the placement plate 14 and the bottom of the protective box 11. There are four guide rods 21, and the four guide rods 21 are arranged in groups of two on both sides of the length direction of the protective box 11. The four guide rods 21 are parallel to each other in length direction and are arranged at intervals. The length direction of the guide rod 21 is parallel to the length direction of the protective box 11. The guide rod 21 is spaced apart from the bottom of the protective box 11 and both ends of the guide rod 21 are fixed to the inner wall of the end of the protective box 11.

[0038] Combine Figure 2 and Figure 3 The fixing assembly 2 further includes a sleeve 22, a first connecting rod 23, a second connecting rod 24, and a clamping plate 25. Two sleeves 22, one first connecting rod 23, two second connecting rods 24, and one clamping plate 25 form a clamping structure. Each set of guide rods 21 is provided with a clamping structure at both ends. Within each clamping structure, the sleeve 22 is slidably mounted on the guide rods 21, with the two sleeves 22 disposed on the same side of the two guide rods 21. The ends of the first connecting rod 23 are fixedly connected to the opposing side walls of the two sleeves 22, respectively. The length of the first connecting rod 23 is perpendicular to the length of the guide rods 21. The second connecting rod 24 is disposed on the side of the sleeve 22 facing away from the bottom of the protective box 11. The length of the second connecting rod 24 is perpendicular to the surface of the placement plate 14. The placement plate 14 has a sliding groove 141 formed on the surface of the placement plate 14. The length of the sliding groove 141 is parallel to the length of the guide rod 21. The ends of the second connecting rod 24 pass through the sliding groove 141 and are fixed to the side wall of the sleeve 22. The ends of the two second connecting rods 24 on the same side are respectively fixed to the two side walls of the sleeve 22. The clamping plate 25 is disposed within the protective box 11 above the placement plate 14. The surface of the clamping plate 25 is perpendicular to the length of the guide rod 21. The side walls of the clamping plate 25 are fixed to the ends of the two second connecting rods 24 facing away from the sleeve 22.

[0039] Combine Figure 2 and Figure 3 The fixed assembly 2 further includes a rotating shaft 26, a rotating plate 27, and a rotating connecting rod 28. The rotating shaft 26, rotating plate 27, and two rotating connecting rods 28 form a transmission structure. Two transmission structures are provided within the protective box 11, and the two transmission structures are respectively disposed between the two guide rods 21 of the two groups. In one transmission structure, the rotating shaft 26 is fixedly mounted at the bottom of the protective box 11, located between the two guide rods 21 of the group, with the axis of the rotating shaft 26 perpendicular to the surface of the placement plate 14. The rotating plate 27 is mounted on the rotating shaft 26, and the rotating shaft 26 penetrates the middle of the rotating plate 27 surface and is fixedly connected to the rotating plate 27. The rotating plate 27 is spaced apart from the bottom of the protective box 11, and the surface of the rotating plate 27 is always parallel to the bottom of the protective box 11. The rotating connecting rod 28 is arranged between the placement plate 14 and the bottom of the protective box 11. One end of the rotating connecting rod 28 is hinged to one end of the rotating plate 27 close to the placement plate 14, and the other end is hinged to the middle of the side wall of the first connecting rod 23 close to the placement plate 14.

[0040] Combine Figure 2 and Figure 3 The fixing assembly 2 also includes an electric push rod 29, which is arranged between the placement plate 14 and the bottom of the protective box 11, and the electric push rod 29 is located between the two groups of guide rods 21. There are two electric push rods, and the push rods of the two electric push rods 29 are respectively fixed to the side walls of a sleeve 22 of a group of clamping structures through connecting plates.

[0041] Combine Figure 2 and Figure 3 By setting up a transmission structure, the electric push rod 29 only needs to push the clamping structure at one end of the guide rod 21 to move the two clamping plates 25 on a set of guide rods 21 closer to or farther away from each other, thereby clamping and fixing the lithium battery pack and improving the safety of the placement of the lithium battery pack.

[0042] Combine Figure 2 and Figure 4 The heat dissipation assembly 3 includes a ventilation duct 31 and a fan 32. The ventilation duct 31 is suspended in the protective box 11. The length direction of the ventilation duct 31 is parallel to the length direction of the protective box 11. The ventilation duct 31 is a square tube. The ventilation duct 31 connects the outer walls of the protective box 11 at both ends. Ventilation holes 311 are opened on the two side walls of the ventilation duct 31 adjacent to the placement plate 14. The ventilation holes 311 connect the inside and outside of the ventilation duct 31. The ventilation holes 311 are distributed in rows on the side walls of the ventilation duct 31. The ventilation holes 311 and the heat dissipation holes 111 can allow air to circulate and prevent the temperature in the protective box 1 from being too high. Two fans 32 are provided and the two fans 32 are fixed at both ends of the inner wall of the ventilation duct 31. The fans 32 blow cooling air into the ventilation duct 31. A baffle 33 is provided in the ventilation duct 31. The baffle 33 is located in the middle of the ventilation duct 31. The baffle 33 is perpendicular to the length direction of the ventilation duct 31. The baffle 33 can prevent the cooling airflows blown by the two fans 32 from interfering with each other.

[0043] Combine Figure 2 and Figure 4The heat dissipation assembly 3 further includes a guide plate 34, which is arranged in the ventilation pipe 31 on both sides of the baffle 33. The guide plate 34 is an arc-shaped plate. One end of the guide plate 34 is fixedly connected to the inner wall of the ventilation pipe 31 where the ventilation holes 311 are opened, and is located between two adjacent rows of ventilation holes 311. The guide plates 34 are symmetrically distributed on the inner walls of both sides of the ventilation pipe 31. The guide plates 34 with the same distance from the baffle 33 form a pair. At least three pairs of guide plates 34 are provided on one side of the baffle 33 in the ventilation pipe 31. The distance between each pair of guide plates 34 is not uniform, and the distance between each pair of guide plates 34 gradually increases from close to the baffle 33 to far away from the baffle 33. The surface of the guide plates 34 is bent into an arc opening facing away from the baffle 33, and the arc opening of each pair of guide plates 34 is flared. The guide plates 34 can divert and guide the cooling airflow blown out by the two fans 32, so that the multiple groups of lithium batteries placed on both sides of the ventilation pipe 31 in the protective box 11 can dissipate heat evenly.

[0044] Combine Figure 2 and Figure 4 The heat dissipation assembly 3 also includes a guide rail 35 and a partition 36. The guide rail 35 is fixedly connected to the outer wall of the ventilation pipe 31 with ventilation holes 311. The length direction of the guide rail 35 is parallel to the length direction of the ventilation pipe 31. Four guide rails 35 are provided, and the four guide rails 35 are respectively installed at the edges of the outer walls on both sides adjacent to the ventilation pipe 31 and the placement plate 14. A consistent number of partition members 36 are slidably provided on each guide rail 35. The length direction of the partition member 36 is perpendicular to the side wall of the protective box 11. A lithium battery pack is placed between two adjacent partition members 36. The partition member 36 and the guide rail 35 can create gaps between the lithium batteries and between the lithium batteries and the side wall of the ventilation pipe 31, which can better circulate the cooling airflow and improve the heat dissipation efficiency.

[0045] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but as long as they are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. A lithium battery high temperature protection structure, characterized by: The protective structure comprises a protective box (11), a placement plate (14), a fixing assembly (2), a ventilation pipe (31) and a fan (32); the placement plate (14) is arranged in the protective box (11); the fixing assembly (2) is arranged between the placement plate (14) and the bottom of the protective box (11); the ventilation pipe (31) is arranged in the protective box (11) above the placement plate (14) and spaced apart from the placement plate (14); the ventilation pipe (31) is connected to the outer walls of both ends of the protective box (11); a plurality of pairs of guide plates (34) are arranged on the inner side wall of the ventilation pipe (31); and the fan (32) is fixedly arranged at the end of the ventilation pipe (31).

2. The lithium battery high temperature protection structure according to claim 1, characterized in that: The fixing assembly (2) includes a guide rod (21), a sleeve (22), a first connecting rod (23), a second connecting rod (24), a clamping plate (25), a transmission structure and an electric push rod (29), wherein the guide rod (21) is fixed to the bottom of the protection box (11), the sleeve (22) is slidably sleeved on the guide rod (21), the first connecting rod (23) is fixed to the side wall of the sleeve (22), one end of the second connecting rod (24) is fixed to the upper surface of the sleeve (22), and the other end penetrates the placement plate (14) and is fixed to the side wall of the clamping plate (25), the transmission structure is rotatably arranged between the bottom of the protection box (11) and the placement plate (14), the transmission structure is fixed to the first connecting rod (23), the electric push rod (29) is fixed to the bottom of the protection box (11), and the push rod of the electric push rod (29) is fixed to the side wall of the sleeve (22).

3. The lithium battery high temperature protection structure according to claim 2, characterized in that: The transmission structure comprises a rotating shaft (26), a rotating plate (27) and a rotating connecting rod (28), wherein the rotating shaft (26) is fixedly connected to the bottom of the protection box (11), the rotating plate (27) is fixedly sleeved on the rotating shaft (26) and spaced apart from the bottom of the protection box (11), and one end of the rotating connecting rod (28) is fixedly connected to the end of the plate surface of the rotating plate (27), and the other end is fixedly connected to the side wall of the first connecting rod (23).

4. The lithium battery high temperature protection structure according to claim 1, characterized in that: Heat dissipation holes (111) are provided on two opposite side walls of the protection box (11).

5. The lithium battery high temperature protection structure according to claim 4, characterized in that: A ventilation hole (311) is provided on the side wall of the ventilation pipe (31) opposite to the side wall of the protection box (11).

6. The lithium battery high temperature protection structure according to claim 5, characterized in that: A baffle (33) is fixedly connected to the middle portion of the ventilation pipe (31).

7. The lithium battery high temperature protection structure according to claim 1, characterized in that: The guide plates (34) are arc-shaped, and the arc openings of each pair of guide plates (34) are all flared, with the flared openings facing the end of the ventilation pipe.

8. The lithium battery high temperature protection structure according to claim 7, characterized in that: The guide plates (34) are provided in multiple pairs, and the intervals between the two guide plates (34) in each pair are different. The intervals between the two guide plates (34) in each pair gradually decrease from the end of the ventilation pipe (31) to the middle of the ventilation pipe (31).

9. The lithium battery high temperature protection structure according to claim 8, characterized in that: The ventilation pipe (31) is provided with a guide rail (35) fixedly connected to the outer edge of the side wall of the ventilation pipe (31), and a partition piece (36) is slidably provided on the guide rail (35).

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