Cylindrical battery module capable of efficiently dissipating heat

Abstract

The utility model discloses a cylindrical battery module capable of dissipating heat efficiently. The cylindrical battery module comprises a battery pack and a heat dissipation assembly for dissipating heat of the battery pack, the battery pack comprises single batteries which are arranged. The heat dissipation assembly comprises a snake-shaped heat dissipation piece and an annular heat conduction part, and the annular heat conduction part is arranged on the outer side face of the single battery by a circle. A through groove is formed in the snakelike heat dissipation piece, and a single battery and an annular heat conduction part are arranged in one through groove in a sleeving manner. According to the cylindrical battery module capable of efficiently dissipating heat, the snake-shaped heat dissipation piece and the annular heat conduction part are combined, the annular heat conduction part is tightly attached to the single battery, the contact area between the annular heat conduction part and the single battery is effectively increased, heat in the single battery is more efficiently conducted into the snake-shaped heat dissipation piece, and the snake-shaped heat dissipation piece dissipates heat of the single battery, so that the service life of the cylindrical battery module is prolonged. The cylindrical battery module with the efficient heat dissipation function is high in heat dissipation efficiency and compact in structure. Compared with the prior art, heat conduction pouring sealants or heat conduction silica gel pads do not need to be added into gaps of the single batteries for heat dissipation, the volume grouping rate is reduced, and the weight grouping rate is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a battery field especially relates to a cylindrical battery module of high -efficient heat dissipation. BACKGROUND

[0002] At present, after the battery is stacked into a cylindrical power battery module, there are many unusable gaps in the adjacent area of the radial arc surface and the arc surface, which leads to a low volume grouping rate of the module. Not only that, when the module is applied to high-temperature environment and high-rate discharge, the design difficulty of the heat dissipation scheme also lies in that the battery is a cylinder, and it is difficult to improve the grouping rate and heat dissipation efficiency of the module.

[0003] A common type of module on the market is a snake-shaped pipe heat dissipation scheme. The volume of the heat dissipation source of this scheme is too large, and the heat dissipation needs to be carried out through the circulation of liquid or gas. In addition, a heat-conducting and heat-soaking medium is also needed for heat dissipation. The heat-conducting and heat-soaking medium is generally heat-conducting pouring sealant or heat-conducting silicone rubber pad, which has a large density. Not only does it reduce the volume grouping rate, but it also greatly reduces the weight grouping rate. The heat dissipation system is relatively complex, and the reliability and safety are poor. In addition, the long endurance advantage of the unmanned aerial vehicle is sacrificed. The snake-shaped pipe heat dissipation scheme also has a major defect, that is, the contact area between the heat-conducting and heat-soaking medium and the battery is small, and it is difficult to achieve high heat dissipation power. SUMMARY

[0004] The utility model aims at overcoming the insufficient in prior art, provide a cylindrical battery module of high -efficient heat dissipation.

[0005] The utility model aims at overcoming the insufficient in prior art, provide a cylindrical battery module of high -efficient heat dissipation.

[0006] A cylindrical battery module of high -efficient heat dissipation, comprising:

[0007] The battery pack comprises at least one single battery, and the single batteries are arranged.

[0008] The heat dissipation assembly comprises a snake-shaped heat dissipation piece and an annular heat-conducting part, the annular heat-conducting part is arranged on the outer side of the single battery, and the snake-shaped heat dissipation piece is provided with a through slot.

[0009] In one embodiment, the heat dissipation assembly further comprises two fixing plates, the fixing plates are arranged on the outer side of the battery pack, and the two fixing plates are arranged on the opposite sides of the battery pack.

[0010] In one embodiment, the heat dissipation assembly further comprises a heat dissipation fin, the heat dissipation fin comprises a plurality of heat dissipation fins, the heat dissipation fins are in the shape of a cuboid, and the heat dissipation fins are fixed to the outer side of the fixing plate.

[0011] In one of the embodiments, the heat dissipation assembly further comprises a sheet-shaped heat dissipation fin arranged between the fixed plate and the serpentine heat dissipation member.

[0012] In one of the embodiments, a gap between the sheet-shaped heat dissipation fin and the fixed plate is filled with a layer of heat-conductive silicone grease.

[0013] In one of the embodiments, a local outer side of the annular heat-conductive part is provided with a sponge layer, so that the annular heat-conductive part is in interference fit with the serpentine heat dissipation member.

[0014] In one of the embodiments, the battery pack further comprises four support columns, the serpentine heat dissipation member is provided with fixing grooves, and the support columns are sleeved in the fixing grooves.

[0015] In one of the embodiments, an edge of the fixed plate extends a limiting baffle plate on a side close to the battery pack, and the sheet-shaped heat dissipation fin is limitedly arranged between the fixed plate and the limiting baffle plate.

[0016] In one of the embodiments, the single battery comprises a positive electrode end and a negative electrode end, each of the positive electrode ends faces upward, and each of the negative electrode ends faces downward; the battery pack further comprises two bus bars, one of the bus bars is arranged on the surface of the positive electrode end, the other of the bus bars is arranged on the surface of the negative electrode end, and the two bus bars are respectively in conductive connection with the positive electrode end and the negative electrode end.

[0017] In one of the embodiments, the serpentine heat dissipation member, the annular heat-conductive part and the sheet-shaped heat dissipation fin are graphene sheets.

[0018] Compared with the prior art, the high-efficiency heat dissipation cylindrical battery module has at least the following advantages:

[0019] The high-efficiency heat dissipation cylindrical battery module comprises a battery pack and a heat dissipation assembly for heat dissipation of the battery pack. The battery pack comprises single batteries, and the single batteries are arranged. The heat dissipation assembly comprises a serpentine heat dissipation member and an annular heat-conductive part, and the annular heat-conductive part is arranged around an outer side of the single battery. The serpentine heat dissipation member is provided with a through groove, and a single battery and an annular heat-conductive part are sleeved in the through groove. The high-efficiency heat dissipation cylindrical battery module adopts a combination of the serpentine heat dissipation member and the annular heat-conductive part, the annular heat-conductive part is tightly attached to the single battery, the contact area with the single battery is effectively increased, the heat in the single battery is more efficiently conducted to the serpentine heat dissipation member, and the serpentine heat dissipation member dissipates heat for the single battery. Therefore, the high-efficiency heat dissipation cylindrical battery module has high heat dissipation efficiency and compact structure. Compared with the prior art, it is not necessary to add heat-conductive pouring sealant or heat-conductive silicone rubber pad in the gap of the single battery for heat dissipation, which not only reduces the volume assembly rate but also reduces the weight assembly rate. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to make the technical solutions of the embodiments of the present application clearer, the drawings needed in the embodiments will be briefly introduced as follows.

[0021] Figure 1 It is an explosion structure schematic view of the high-efficiency heat dissipation cylindrical battery module in an embodiment of the present application.

[0022] Figure 2 It is a three-dimensional structure schematic view of the high-efficiency heat dissipation cylindrical battery module in an embodiment of the present application.

[0023] Reference signs:

[0024] Battery pack 100, single battery 110, support column 120, heat dissipation assembly 200, serpentine heat dissipation piece 210, through slot 211, annular heat conduction part 220, heat dissipation fin 230, fixed plate 240, limiting baffle 241, sheet-shaped heat dissipation fin 250. DETAILED DESCRIPTION

[0025] In order to facilitate understanding of the present application, the present application will be more fully described below with reference to the relevant drawings.

[0026] The present application proposes a high-efficiency heat dissipation cylindrical battery module, please refer to Figure 1 and Figure 2 , comprising: battery pack 100 and heat dissipation assembly 200 for heat dissipation of battery pack 100. The battery pack 100 comprises at least one single battery 110, and the single batteries 110 are arranged. The heat dissipation assembly 200 comprises a serpentine heat dissipation piece 210 and at least one annular heat conduction part 220, and the materials of the serpentine heat dissipation piece 210 and the annular heat conduction part 220 are both graphene materials, and the heat conduction performance and the heat dissipation performance of the graphene are better. One annular heat conduction part 220 tightly surrounds one side of one single battery 110, and is sleeved on the outside of the single battery 110. When the battery pack 100 works or charges, the single battery 110 will generate heat, and the annular heat conduction part 220 can conduct the heat in the single battery 110.

[0027] The serpentine heat dissipation member 210 is provided with at least one through slot 211, the number of through slots 211 corresponds to the number of single batteries 110 one by one, a single battery 110 and a ring-shaped heat conduction part 220 are sleeved in a through slot 211, the heat in the ring-shaped heat conduction part 220 is transmitted to the serpentine heat dissipation member 210, the serpentine heat dissipation member 210 has a large heat dissipation area, can conduct heat to the outside, and is in contact with air or other heat dissipation effects to conduct heat. The high-efficiency cylindrical battery module of the application adopts the combination of the serpentine heat dissipation member 210 and the ring-shaped heat conduction part 220, the ring-shaped heat conduction part 220 is tightly attached to the single battery 110, effectively increasing the contact area with the single battery 110, and more efficiently conducting the heat in the single battery 110 to the serpentine heat dissipation member 210, the serpentine heat dissipation member 210 dissipates heat from the single battery 110, therefore, the high-efficiency cylindrical battery module of the application has high heat dissipation efficiency and compact structure. Compared with the prior art, it is not necessary to add heat-conducting pouring glue or heat-conducting silicone rubber pads in the gap of the single battery 110 for heat dissipation, which not only reduces the volume assembly rate, but also reduces the weight assembly rate, at the same time, reduces the manufacturing cost, increases the reliability and safety of the high-efficiency cylindrical battery module.

[0028] Please refer to Figure 1 , the heat dissipation assembly 200 further comprises two fixed plates 240. The fixed plates 240 are arranged on the outer side of the battery pack 100, and the fixed plates 240 are fixed on the outer side of the serpentine heat dissipation member 210, which protects and further fixes the battery pack 100 and the serpentine heat dissipation member 210, and improves the anti-collision performance of the battery pack 100. Moreover, the fixed plates 240 can maintain the serpentine shape of the serpentine heat dissipation member 210.

[0029] Further, the heat dissipation assembly 200 further comprises a sheet-shaped heat dissipation sheet 250, the sheet-shaped heat dissipation sheet 250 is arranged between the fixed plates 240 and the serpentine heat dissipation member 210, one side of the sheet-shaped heat dissipation sheet 250 is tightly attached to the outer side of the serpentine heat dissipation member 210, and the other side is tightly attached to the fixed plate 240. The fixed plate 240 is an aluminum alloy plate with strong heat dissipation performance, and the sheet-shaped heat dissipation sheet 250 is made of graphene material, so that the heat on the serpentine heat dissipation member 210 is transmitted to the fixed plate 240 through the sheet-shaped heat dissipation sheet 250 for heat dissipation, further increasing the heat dissipation area and further enhancing the heat dissipation effect. The two fixed plates 240 are arranged on the opposite sides of the battery pack 100, the heat dissipation is more uniform, and the local heat accumulation of the battery pack 100 is avoided.

[0030] In addition, the heat dissipation assembly 200 further comprises a heat dissipation fin 230, the heat dissipation fin 230 comprises a plurality of heat dissipation fins, and the heat dissipation fin 230 and the heat dissipation fins thereof dissipate heat through air convection. The heat dissipation fins are in the shape of cuboids, each heat dissipation fin is fixed vertically on the outer side of the fixed plate 240, that is, the length direction of the heat dissipation fin is parallel to the height direction of the fixed plate 240, so as to increase the heat dissipation area of the fixed plate 240 and further enhance the heat dissipation effect of the heat dissipation assembly 200, and the heat dissipation efficiency is higher.

[0031] In an embodiment, a layer of heat-conductive silicone grease is filled in the gap between the sheet-shaped heat dissipation fin 250 and the fixed plate 240, the layer of heat-conductive silicone grease is filled in the tiny gap between the sheet-shaped heat dissipation fin 250 and the fixed plate 240, so as to improve the heat conduction efficiency between the sheet-shaped heat dissipation fin 250 and the fixed plate 240 and further improve the heat dissipation efficiency of the battery pack 100. The material of the layer of heat-conductive silicone grease is heat-conductive silicone grease, which is a high-heat-conducting and insulating silicone material, almost never solidifies, and can keep the grease state for a long time at a temperature of-50℃ to +230℃. It has excellent electrical insulation and excellent heat conductivity. It can be widely coated on the contact surface between the heat-generating body and the heat dissipation fin, heat dissipation strip, shell and the like in various electronic products, and plays a role of heat transfer medium. Such a silicone material provides excellent heat conduction effect for the electronic components generating heat.

[0032] Further, the outer side of the annular heat-conducting part 220 is partially provided with a sponge layer. In this embodiment, the sponge layer has the characteristics of compressibility and resilience, so that the annular heat-conducting part 220 is in interference fit with the serpentine heat dissipation member 210, the single battery 110, the annular heat-conducting part 220 and the serpentine heat dissipation member 210 are more closely attached to each other, and the heat of the single battery 110 can be efficiently transferred to the serpentine heat dissipation member 210 through the annular heat-conducting part 220.

[0033] Please refer to Figure 1 and Figure 2 , the battery pack 100 further comprises four support columns 120, the support columns 120 are made of EVA foaming material, which has small density and high hardness, and is a high-quality structural filling material in the lithium battery industry. The serpentine heat dissipation member 210 is provided with a fixing groove, and the support column 120 is sleeved in the fixing groove, so as to better maintain the shape of the serpentine heat dissipation member 210 and conduct the heat in the serpentine heat dissipation member 210 to the fixed plate 240 for heat dissipation.

[0034] Further, the edge of the fixed plate 240 extends out a limiting baffle 241 on the side close to the battery pack 100, the limiting baffle 241 is arranged on the top and bottom of the fixed plate 240, respectively, to limit the edge of the sheet-shaped heat dissipation fin 250, so that the sheet-shaped heat dissipation fin 250 is arranged in limiting mode between the fixed plate 240 and the limiting baffle 241, and the sheet-shaped heat dissipation fin 250 is prevented from being out of position.

[0035] Furthermore, each individual battery cell 110 includes a positive terminal and a negative terminal, with each positive terminal facing upwards and each negative terminal facing downwards. The battery pack 100 also includes two busbars. One busbar is disposed on the surface of the positive terminal, electrically connecting the positive terminals of all individual batteries 110. The other busbar is disposed on the surface of the negative terminal, electrically connecting the negative terminals of all individual batteries 110, thereby enabling the individual batteries 110 to be connected in series or parallel to form a high-current or high-voltage battery pack 100. The busbars are respectively fastened to the top and bottom of the fixing plates 240 on both sides for better fixation and improved resistance to deformation when the battery pack 100 experiences movement.

[0036] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A high-efficiency heat dissipation cylindrical battery module, characterized in that, include: A battery pack, the battery pack comprising at least one individual cell, the individual cells being arranged in an array; and A heat dissipation assembly includes a serpentine heat sink and at least one annular heat-conducting part, wherein the annular heat-conducting part is disposed around the outer side of a single cell; the serpentine heat sink is provided with at least one through groove, and the single cell and the annular heat-conducting part are fitted into the through groove.

2. The high-efficiency heat dissipation cylindrical battery module according to claim 1, characterized in that, The heat dissipation assembly also includes two fixing plates, which are disposed on the outside of the battery pack and on opposite sides of the battery pack.

3. The high-efficiency heat dissipation cylindrical battery module according to claim 2, characterized in that, The heat dissipation assembly also includes sheet-shaped heat sinks, which are disposed between the fixed plate and the serpentine heat sink.

4. The high-efficiency heat dissipation cylindrical battery module according to claim 3, characterized in that, The heat dissipation assembly also includes heat dissipation fins, which include a plurality of heat dissipation plates. The heat dissipation plates are in the form of cuboids and are fixed to the outer side of the fixing plate.

5. The high-efficiency heat dissipation cylindrical battery module according to claim 3, characterized in that, The gap between the sheet-like heat sink and the fixing plate is filled with a layer of thermally conductive silicone grease.

6. The high-efficiency heat dissipation cylindrical battery module according to any one of claims 1-5, characterized in that, A sponge layer is provided on the outer part of the annular heat-conducting part, so that the annular heat-conducting part and the serpentine heat sink are interference fit.

7. The high-efficiency heat dissipation cylindrical battery module according to claim 1 or 2, characterized in that, The battery pack also includes four support columns, and the serpentine heat sink is provided with a fixing groove, and the support columns are sleeved in the fixing groove.

8. The high-efficiency heat dissipation cylindrical battery module according to claim 3 or 4, characterized in that, The edge of the fixing plate extends into a limiting baffle on the side near the battery pack, and the sheet-like heat sink is positioned between the fixing plate and the limiting baffle.

9. The high-efficiency heat dissipation cylindrical battery module according to claim 1 or 5, characterized in that, The single cell includes a positive terminal and a negative terminal, with each positive terminal facing upwards and each negative terminal facing downwards; the battery pack also includes two busbars, one busbar being disposed on the surface of the positive terminal and the other busbar being disposed on the surface of the negative terminal, and the two busbars being electrically connected to the positive terminal and the negative terminal respectively.

10. The high-efficiency heat dissipation cylindrical battery module according to claim 3 or 4, characterized in that, The serpentine heat sink, the annular heat-conducting part, and the sheet-like heat sink are graphene sheets.

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