Heat dissipation shell for lithium battery pack

Abstract

The heat dissipation shell comprises a shell body, the top and the bottom of an inner cavity of the shell body are respectively provided with a buffer assembly, mounting plates and limiting corners, every four limiting corners form a group, and each group of opposite limiting corners on the mounting plates at the top and the bottom limit four corners of the top and the bottom of a single lithium battery. A plurality of through heat dissipation grooves are evenly formed in the mounting plate, and a plurality of ventilation grooves are evenly formed in the side wall of the shell. According to the heat dissipation shell for the lithium battery pack, through the arrangement of the heat dissipation grooves, the ventilation grooves, the heat dissipation fans, the buffer assemblies and the like, the lithium battery monomers can be separately fixed, and air is blown from the top and the bottom, so that heat dissipation treatment on each lithium battery monomer can be realized, and the lithium battery pack is uniform in heat dissipation; therefore, the inconsistency of the service lives of the lithium battery monomers is avoided. And the buffering performance on the lithium battery monomers is good, and the lithium battery monomers are prevented from being damaged by impact.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery pack production, in particular to a heat dissipation shell for a lithium battery pack. Background Art

[0002] Lithium batteries have the characteristics of light weight and high energy density. Multiple lithium batteries are connected in series and parallel and placed in a casing to assemble into a high-power, large-capacity lithium battery pack. Lithium battery packs can be used as a power source for some vehicles or electrical equipment, such as electric vehicles, ships, and electric trains.

[0003] Lithium battery packs generate a lot of heat when working, which increases the temperature inside the battery. Especially for modules composed of multiple single cells, the temperature inside the module will rise faster, causing the operating temperature to rise. If high-power discharge is carried out for a long time without heat dissipation, the lithium battery pack is prone to thermal runaway, which reduces the service life and may even cause lithium battery fire. At the same time, the existing lithium battery pack casing is only used for packaging or anti-collision, and there is no shock-absorbing design for the lithium battery pack. During the bumpy driving of the vehicle, the lithium battery pack is easily damaged. The damage to the lithium battery pack is also easy to cause working failures, resulting in excessive local temperature, which may even cause safety accidents. Therefore, we propose a new heat dissipation casing for lithium battery packs. Utility Model Content

[0004] The main purpose of the utility model is to provide a heat dissipation shell for a lithium battery pack, which can effectively solve the problems in the background technology.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows: a heat dissipation shell for a lithium battery pack, comprising a shell, buffer components are symmetrically fixedly connected to the two sides of the bottom of the inner cavity of the shell, a mounting plate is arranged on the top of the buffer component, the buffer component comprises a mounting frame, a spring, a sliding block, a limiting plate, a baffle, and a convex block, two mounting frames are symmetrically fixedly connected to the two sides of the bottom of the inner cavity of the shell, a plurality of springs are evenly fixedly connected to the bottom of the inner cavity of the mounting frame, a sliding block is fixedly connected to the top of the spring, a baffle is fixedly connected to the top of the mounting frame, the sliding block is slidably connected to the inner cavity of the mounting frame and slides through the baffle to the outside, a limiting plate is fixedly connected to the lower part of the side wall of the sliding block, the other two buffer components are fixedly connected to the two sides of the top of the inner cavity of the shell, another mounting plate is arranged at the bottom of the two buffer components, a plurality of limiting angles are fixedly connected to the opposite side of the two mounting plates, and each four limiting angles constitute a group, and each group of limiting angles on the top and bottom mounting plates relative to each other limit the four corners of the top and bottom of the lithium battery monomer, a plurality of through heat dissipation grooves are evenly opened on the mounting plate, and a plurality of ventilation grooves are evenly opened on the side wall of the shell.

[0006] As a further description of the above technical solution, a protrusion is fixedly connected to the side of the limiting plate facing the mounting plate, and a groove is formed on the side of the mounting plate facing the limiting plate, and the groove is engaged with the protrusion.

[0007] As a further description of the above technical solution, four through slots are symmetrically opened in pairs on the top and bottom of the shell, and a heat dissipation fan is fixedly connected to the inner cavity of the through slot.

[0008] As a further description of the above technical solution, each of the heat dissipation grooves corresponds to a lithium battery cell, and a dustproof net is fixedly connected to the inner cavity of the heat dissipation groove.

[0009] As a further description of the above technical solution, a dust screen is fixedly connected to the inner cavity of the ventilation slot, and a dust screen is fixedly connected to a side of the heat dissipation fan close to the shell.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] 1. By setting heat dissipation slots, ventilation slots, heat dissipation fans, etc., when in use, the lithium battery cells are respectively inserted into the limit angles, and each lithium battery cell is separated so that the wind of the heat dissipation fan can be blown to each lithium battery cell through the heat dissipation slot to achieve uniform heat dissipation. In addition, since there is a gap between each lithium battery cell, when the heat dissipation fan is started, the wind blows from top and bottom to the middle, blowing to each lithium battery cell to dissipate the top and bottom of the lithium battery cell. At the same time, the wind flows between the lithium battery cells and exchanges heat with the edges of the lithium battery cells to reduce the heat in the edge area of ​​the lithium battery cells, effectively improve the utilization rate of the blowing, and enhance the heat dissipation effect. Finally, the hot air is dissipated from the ventilation slots to the outside of the shell, so as to achieve heat dissipation treatment for each lithium battery cell, so that the lithium battery pack dissipates heat evenly, avoids slow heat dissipation of the lithium battery cells in the middle and fast heat dissipation of the lithium battery cells at the edges, thereby avoiding inconsistent lifespans of the lithium battery cells.

[0012] 2. By setting up buffer components, etc., by respectively inserting the lithium battery cells into the limiting angles, the inner wall of the limiting angles is in close contact with the outer wall of the lithium battery cells, so as to stabilize the lithium battery cells and prevent them from shifting. At the same time, if the shell is subjected to severe bumps during use, the lithium battery cells drive the mounting plate to move, so that the sliding block squeezes the spring, and the spring generates a reaction force, which can play a good buffering role on the mounting plate and the lithium battery cells thereon, and prevent the lithium battery cells from being damaged by impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall structure of a heat dissipation housing for a lithium battery pack proposed by the utility model;

[0014] Figure 2This is a schematic diagram of the exploded structure of a heat dissipation shell for a lithium battery pack proposed by the utility model;

[0015] Figure 3 This is a schematic diagram of an exploded structure from another perspective of a heat dissipation housing for a lithium battery pack proposed by the utility model;

[0016] Figure 4 The utility model proposes a heat dissipation shell for a lithium battery pack Figure 3 A is an enlarged structural diagram of FIG.

[0017] In the figure: 1. Shell; 2. Through slot; 3. Cooling fan; 4. Buffer assembly; 5. Mounting plate; 6. Limiting angle; 7. Lithium battery cell; 8. Heat dissipation slot; 9. Dustproof net; 10. Groove; 11. Ventilation slot; 4.1. Mounting frame; 4.2. Spring; 4.3. Sliding block; 4.4. Limiting plate; 4.5. Baffle; 4.6. Bump. DETAILED DESCRIPTION

[0018] In order to make the technical means, creative features and purpose effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0019] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the words "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end", etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] See also Figure 1-4The utility model provides a technical solution: a heat dissipation shell for a lithium battery pack, comprising a shell 1, a buffer assembly 4 is symmetrically fixedly connected to both sides of the bottom of the inner cavity of the shell 1, a mounting plate 5 is arranged on the top of the buffer assembly 4, the buffer assembly 4 comprises a mounting frame 4.1, a spring 4.2, a sliding block 4.3, a limiting plate 4.4, a baffle 4.5, and a protrusion 4.6, two mounting frames 4.1 are symmetrically fixedly connected to both sides of the bottom of the inner cavity of the shell 1, a plurality of springs 4.2 are evenly fixedly connected to the bottom of the inner cavity of the mounting frame 4.1, a sliding block 4.3 is fixedly connected to the top of the spring 4.2, a baffle 4.5 is fixedly connected to the top of the mounting frame 4.1, and the baffle 4.5 is set as a rectangular frame, and the sliding block 4.3 is slidably connected to the inner cavity of the mounting frame 4.1 and slides through the baffle The plate 4.5 extends to the outside, and the lower part of the side wall of the sliding block 4.3 is fixedly connected to the limiting plate 4.4. The size of the limiting plate 4.4 is larger than the size of the baffle 4.5, so that when the sliding block 4.3 slides in the inner cavity of the mounting frame 4.1, the baffle 4.5 can limit the sliding block 4.3. The other two buffer components 4 are fixedly connected to the two sides of the top of the inner cavity of the shell 1. Another mounting plate 5 is provided at the bottom of these two buffer components 4. If the shell 1 is subjected to severe bumps during use, the lithium battery cell 7 drives the mounting plate 5 to move, so that the sliding block 4.3 squeezes the spring 4.2, and the spring 4.2 generates a reaction force, which can play a good buffering role on the mounting plate 5 and the lithium battery cell 7 thereon, and prevent the lithium battery cell 7 from being damaged by impact. A plurality of limiting angles 6 are fixedly connected to the opposite side of the two mounting plates 5, and each group of four limiting angles 6 constitutes a group. Each group of limiting angles 6 on the top and bottom mounting plates 5 limits the four corners of the top and bottom of the lithium battery cell 7. When in use, the lithium battery cell 7 is respectively inserted into the limiting angles 6, and the inner wall of the limiting angle 6 is tightly attached to the outer wall of the lithium battery cell 7, so that the lithium battery cell 7 is stabilized to prevent it from shifting. A plurality of through heat dissipation slots 8 are evenly opened on the mounting plate 5, and a plurality of ventilation slots 11 are evenly opened on the side wall of the housing 1.

[0022] Specifically, Figure 1 As shown, a dust screen is fixedly connected to the inner cavity of the ventilation slot 11, and a dust screen is fixedly connected to the side of the heat dissipation fan 3 close to the shell 1 to prevent external dust from entering the inner cavity of the shell 1 and accumulating on the lithium battery cell 7, resulting in poor heat dissipation of the lithium battery cell 7.

[0023] Specifically, Figure 2 As shown, four through slots 2 are symmetrically opened on the top and bottom of the shell 1, and a heat dissipation fan 3 is fixedly connected to the inner cavity of the slot 2. When the lithium battery cell 7 is cooled, the heat dissipation fan 3 is started to blow the lithium battery cell 7 from the top and bottom directions.

[0024] Each heat dissipation slot 8 corresponds to a lithium battery cell 7, and a dustproof net 9 is fixedly connected to the inner cavity of the heat dissipation slot 8. When in use, the lithium battery cells 7 are respectively inserted into the limiting angles 6, and each lithium battery cell 7 is separated so that the wind of the heat dissipation fan 3 can be blown to each lithium battery cell 7 through the heat dissipation slot 8 to achieve uniform heat dissipation. Moreover, since there is a gap between each lithium battery cell 7, when the heat dissipation fan 3 is started, the wind blows from the top and bottom to the middle, blowing to each lithium battery cell 7, dissipating the top and bottom of the lithium battery cell 7. At the same time, the wind flows between the lithium battery cells 7, exchanges heat with the edges of the lithium battery cells 7, reduces the heat in the edge area of ​​the lithium battery cells 7, effectively improves the utilization rate of the blowing, and enhances the heat dissipation effect. Finally, the hot air is dissipated from the ventilation slot 11 to the outside of the shell 1, so that the heat dissipation of each lithium battery cell 7 can be achieved, so that the lithium battery pack dissipates heat evenly, avoiding the slow heat dissipation of the lithium battery cells 7 in the middle and the fast heat dissipation of the lithium battery cells 7 at the edge, thereby avoiding the inconsistent life of the lithium battery cells 7.

[0025] Specifically, Figure 3 , Figure 4 As shown, a protrusion 4.6 is fixedly connected to the side of the limiting plate 4.4 facing the mounting plate 5, and a groove 10 is formed on the side of the mounting plate 5 facing the limiting plate 4.4, and the groove 10 is engaged with the protrusion 4.6.

[0026] It should be noted that the utility model is a heat dissipation shell for a lithium battery pack. When in use, the lithium battery cells 7 are respectively inserted into the limiting angles 6. By respectively inserting the lithium battery cells 7 into the limiting angles 6, the inner wall of the limiting angle 6 is tightly attached to the outer wall of the lithium battery cells 7, so that the lithium battery cells 7 are stabilized to prevent them from shifting. Each lithium battery cell 7 can be separated so that the wind from the heat dissipation fan 3 can be blown to each lithium battery cell 7 through the heat dissipation groove 8 to achieve uniform heat dissipation. Moreover, since there is a gap between each lithium battery cell 7, when the heat dissipation fan 3 is started, the wind blows from the top and bottom to the middle, blowing to each lithium battery cell 7 to dissipate the top and bottom of the lithium battery cell 7. At the same time, the wind flows between the lithium battery cells 7 and exchanges heat with the edges of the lithium battery cells 7 to reduce the heat in the edge area of ​​the lithium battery cells 7, effectively improve the utilization rate of the blowing, and enhance the heat dissipation effect. Finally, the hot air is dissipated from the ventilation groove 11 to the outside of the shell 1, which can achieve heat dissipation treatment for each lithium battery cell 7, so that the lithium battery pack dissipates heat evenly, avoids slow heat dissipation of the lithium battery cells 7 in the middle and fast heat dissipation of the lithium battery cells 7 at the edges, thereby avoiding inconsistent lifespans of the lithium battery cells 7.

[0027] If the housing 1 is subjected to severe bumps during use, the lithium battery cell 7 drives the mounting plate 5 to move, so that the sliding block 4.3 squeezes the spring 4.2, and the spring 4.2 generates a reaction force, which can play a good buffering role for the mounting plate 5 and the lithium battery cell 7 thereon, preventing the lithium battery cell 7 from being damaged by impact.

[0028] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A heat dissipation housing for a lithium battery pack, comprising a housing (1), It is characterized in that The two sides of the bottom of the inner cavity of the shell (1) are symmetrically fixedly connected with buffer components (4), and the top of the buffer component (4) is provided with a mounting plate (5). The buffer component (4) comprises a mounting frame (4.1), a spring (4.2), a sliding block (4.3), a limit plate (4.4), a baffle (4.5), and a convex block (4.6). The two mounting frames (4.1) are symmetrically fixedly connected to the two sides of the bottom of the inner cavity of the shell (1). The bottom of the inner cavity of the mounting frame (4.1) is evenly fixedly connected with a plurality of springs (4.2). The top of the spring (4.2) is fixedly connected with a sliding block (4.3). The top of the mounting frame (4.1) is fixedly connected with a baffle (4.5). The sliding block (4.3) is slidably connected to the mounting frame (4.1). 1) inner cavity and slides through the baffle (4.5) to the outside, the lower part of the side wall of the sliding block (4.3) is fixedly connected to a limit plate (4.4), and the other two buffer components (4) are fixedly connected to the top two sides of the inner cavity of the shell (1), and another mounting plate (5) is provided at the bottom of the two buffer components (4), and a plurality of limit angles (6) are fixedly connected to the opposite sides of the two mounting plates (5), and each four limit angles (6) constitute a group, and each group of relative limit angles (6) on the top and bottom mounting plates (5) limits the four corners of the top and bottom of the lithium battery monomer (7), and the mounting plates (5) are evenly provided with a plurality of through heat dissipation grooves (8), and the side wall of the shell (1) is evenly provided with a plurality of ventilation grooves (11).

2. A heat dissipation housing for a lithium battery pack according to claim 1, It is characterized in that A protrusion (4.6) is fixedly connected to the side of the limiting plate (4.4) facing the mounting plate (5), and a groove (10) is formed on the side of the mounting plate (5) facing the limiting plate (4.4), and the groove (10) is snap-fitted and connected to the protrusion (4.6).

3. A heat dissipation housing for a lithium battery pack according to claim 1, It is characterized in that The top and bottom of the shell (1) are symmetrically provided with four through slots (2), and the inner cavity of the through slots (2) is fixedly connected to a heat dissipation fan (3).

4. A heat dissipation housing for a lithium battery pack according to claim 1, It is characterized in that Each of the heat dissipation grooves (8) corresponds to a lithium battery cell (7), and a dustproof net (9) is fixedly connected to the inner cavity of the heat dissipation groove (8).

5. A heat dissipation housing for a lithium battery pack according to claim 3, It is characterized in that The inner cavity of the ventilation slot (11) is fixedly connected to a dust screen, and the side of the heat dissipation fan (3) close to the housing (1) is fixedly connected to a dust screen.

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