Cylindrical battery module

Abstract

The utility model discloses a cylindrical battery module which comprises a battery pack, a heat dissipation assembly and a heating assembly, the battery pack comprises single batteries, and the single batteries are arranged in an array in the same direction; the heat dissipation assembly comprises a clamping plate and a heat conduction film, the heat conduction film is arranged on the periphery of the outer side face of each single battery, the clamping plate is arranged at one end of the battery pack, and one end of the heat conduction film is in close contact with the clamping plate; the heating assembly comprises a heating piece, and the heating piece is arranged on one side of the clamping plate. According to the utility model, the clamping plates, the heating sheets and the heat conduction films are combined to heat and dissipate heat of the battery pack, and the single batteries are respectively heated or dissipated in the radial direction and the axial direction, so that the heating and heat dissipation efficiency is improved, and the structure is compact. Compared with the prior art, a heat conduction caulking substance does not need to be added into the single battery for heat conduction during heating, so that 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. BACKGROUND

[0002] Cylindrical battery is a kind of battery with high capacity, long cycle life and wide use environment temperature.Cylindrical battery is applied to solar energy lamps, lawn lamps, backup energy, electric tools, toy models and photovoltaic energy and other electric devices.

[0003] At present, a common type of large cylindrical battery is of the same direction lug structure, and the explosion-proof valve is located in the opposite direction of the lug.For the heating of this type of battery, a common method on the market is to arrange heating sheets in a serpentine shape between single batteries for heating and heat dissipation.This scheme can fill the radial arc surface waste space between batteries with serpentine pipes, but the heating source volume is too large, and heating needs to be heated by liquid or gas circulation, which not only reduces the volume assembly rate, but also greatly reduces the weight assembly rate, the heat transfer system is relatively complex, and the reliability and safety are poor.At the same time, the cylindrical battery is a winding structure, the effective heating area is small, the radial heat conduction is poor, and the heat transfer efficiency is low. SUMMARY

[0004] The utility model aims at overcoming the deficiencies in the prior art, and provides a cylindrical battery module.

[0005] The utility model aims at overcoming the deficiencies in the prior art, and provides a cylindrical battery module.

[0006] A cylindrical battery module comprises:

[0007] A battery pack comprises single batteries arranged in the same direction array;

[0008] A heat dissipation assembly comprises a clamping plate and a heat conduction film, the heat conduction film is arranged on the outer side of the single battery, the clamping plate is arranged on one end of the battery pack, and one end of the heat conduction film is in close contact with the clamping plate; and

[0009] A heating assembly comprises a heating sheet, and the heating sheet is arranged on one side of the clamping plate.

[0010] In one embodiment, the heating assembly further comprises a plurality of heat-conducting pads, one heat-conducting pad is arranged on the end position of one single battery, and all the heat-conducting pads are arranged below the clamping plate, and the heating sheet transmits heat to the battery pack through the clamping plate and the heat-conducting pads.

[0011] In one of the embodiments, the battery pack further comprises a busbar, which is arranged at an end position of the battery pack away from the heating sheet, and sequentially connects the end position of the single battery in series.

[0012] In one of the embodiments, the heating sheet is provided with a plurality of electrode holes, the heat-conducting pad is in the shape of a ring, and a through hole is arranged in the thickness direction of the heat-conducting pad, the electrode hole and the through hole are correspondingly connected, and an electrode of the single battery is arranged in the electrode hole.

[0013] In one of the embodiments, the clamping plate is provided with a mounting hole corresponding to the electrode hole, and the heat-conducting pad is arranged in the mounting hole.

[0014] In one of the embodiments, the heating assembly further comprises a cable, which is electrically connected with the heating sheet, and the cable is connected with the edge of the heating sheet.

[0015] In one of the embodiments, the outer side surface of each single battery is in close contact with the outer side surface of the adjacent single battery.

[0016] In one of the embodiments, the heat-conducting film comprises a graphene sheet and a sponge, the sponge is arranged on the top of the graphene sheet in a winding manner, and the top of the graphene sheet is in interference fit with the clamping plate through the sponge.

[0017] In one of the embodiments, the clamping plate is an aluminum alloy plate, and the clamping plate is coated with insulating paint, so that the clamping plate is insulated from the battery pack and the heating sheet, respectively.

[0018] In one of the embodiments, the heating sheet is provided with a fixing hole, and the heating sheet is fixedly installed on the clamping plate through the fixing hole by a rivet.

[0019] Compared with the prior art, the utility model has at least the following advantages:

[0020] 1、The cylindrical battery module of the utility model is provided with a battery pack, a heat-dissipating assembly and a heating assembly, the heat-conducting film is in the shape of a ring, and the heat-conducting film is attached to the outer arc surface of the single battery.

[0021] When the cylindrical battery module is in a high-temperature environment, in order to maintain the working performance of the cylindrical battery module, the cylindrical battery module needs to be cooled to keep the cylindrical battery module at a normal working temperature. In the radial heat conduction of the single battery, the heat generated by the working of the single battery is conducted to the clamp plate through the heat conduction film, the effective heat dissipation area of the clamp plate is large, and then the heat dissipation efficiency of the battery pack is accelerated, so that the heat accumulation in the battery pack is avoided, the temperature of the battery pack is prevented from being too high and the battery pack is prevented from being burned out, and meanwhile, in the axial direction, the end of the single battery close to the clamp plate directly conducts heat to the clamp plate for heat dissipation, and the single battery is cooled in the axial and radial directions, so that the heat dissipation efficiency is high.

[0022] When the cylindrical battery module is in a low-temperature environment, in order to maintain the working performance of the cylindrical battery module, the cylindrical battery module needs to be heated to keep the cylindrical battery module at a normal working temperature. The power supplies the heating sheet with electricity, the heat generated on the heating sheet is conducted to one end of the single battery through the clamp plate, and at the same time, the heat generated on the heating sheet is also conducted to the heat conduction film through the clamp plate, the heat conduction film heats the single battery in the axial direction of the single battery, and then the heating sheet completes the heat conduction of the single battery in the axial and radial directions, so that the efficiency of the low-temperature heating and high-temperature cooling of the cylindrical battery module is improved, and the reliability and safety of the cylindrical battery module are improved.

[0023] 2、The cylindrical battery module of the utility model adopts the combination of the clamp plate, the heating sheet and the heat conduction film to heat and cool the battery pack, and heats or cools the single battery in the radial and axial directions respectively, the heating and cooling efficiency is improved, and the structure is compact. Compared with the prior art, the heating does not need to add a heat conduction filling material in the single battery for heat conduction, so that the volume assembly rate and the weight assembly rate are reduced. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical scheme of the embodiment of the utility model, the drawings needed in the embodiment will be briefly introduced below.

[0025] Figure 1 It is an explosion structure schematic view of the cylindrical battery module in the embodiment of the utility model.

[0026] Figure 2 It is a three-dimensional structure schematic view of the cylindrical battery module in the embodiment of the utility model.

[0027] REFERENCE SIGNS:

[0028] Battery pack 10, single battery 11, busbar 12, heat conduction film 20, clamp plate 21, mounting hole 22, heating sheet 30, electrode hole 31, fixing hole 32, heat conduction pad 33. DETAILED DESCRIPTION

[0029] For the convenience of understanding the utility model, the utility model will be described more fully below with reference to the relevant drawings.

[0030] The utility model provides a cylindrical battery module, please refer to Figure 1 And 2 , including: battery pack 10, heat dissipation subassembly and heating subassembly, battery pack 10 includes monomer battery 11, monomer battery 11 same direction array arrangement, all monomer battery 11's positive ear is up, its negative ear is down, to facilitate monomer battery 11's series / parallel connection. Its monomer battery 11's top setting positive ear, bottom setting negative ear. Among them, the outer side of each monomer battery 11 and the outer side of its adjacent monomer battery 11 are respectively close, so that the gap between monomer battery 11 is minimized, when the monomer battery 11 of same volume is assembled, the volume of battery pack 10 can be minimum, thereby improving volume group rate. Specifically, the heat dissipation subassembly includes clamping plate 21 and heat conducting film 20, heat conducting film 20 is annular, heat conducting film 20 is arranged on the outer side of all monomer battery 11 respectively, a heat conducting film 20 is arranged on the outer arc surface of a monomer battery 11, clamping plate 21 is arranged on the one end position of battery pack 10, and one end of heat conducting film 20 is in close contact with clamping plate 21. Clamping plate 21 is aluminum alloy plate, which has good thermal conductivity. The heating subassembly includes heating sheet 30, the heating sheet 30 is arranged on one side of the clamping plate 21, that is, the heating sheet 30 and the clamping plate 21 are arranged on one end of the positive ear of the monomer battery 11, and the clamping plate 21 is tightly attached to the edge of all the positive ears and is in close contact with the monomer battery 11. Similarly, the heating sheet 30 is in close contact with the clamping plate 21, so that heat can be transferred among the heating sheet 30, the clamping plate 21, the heat conducting film 20 and the monomer battery 11.

[0031] When the cylindrical battery module is in a high-temperature environment, in order to maintain the working performance of the cylindrical battery module, it is necessary to dissipate heat from the cylindrical battery module so that the cylindrical battery module is at a normal working temperature. In the radial heat conduction of the monomer battery 11, the heat generated by the operation of the monomer battery 11 is conducted radially to the clamping plate 21 through the heat conducting film 20. The clamping plate 21 has a large effective heat dissipation area, thereby accelerating the heat dissipation efficiency of the battery pack 10 and avoiding the accumulation of heat in the battery pack 10, which may cause the battery pack 10 to overheat and burn out. At the same time, in the axial direction, the end of the monomer battery 11 close to the clamping plate 21 directly transfers heat to the clamping plate 21 for heat dissipation. The monomer battery 11 is simultaneously cooled in the axial and radial directions, and the heat dissipation efficiency is high.

[0032] When the cylindrical battery module is in a low-temperature environment, in order to maintain the working performance of the cylindrical battery module, the cylindrical battery module needs to be heated so that the cylindrical battery module is at a normal working temperature. The power supply energizes the heating sheet 30, and the heat generated on the heating sheet 30 is conducted to one end of the single battery 11 through the clamping plate 21 in the radial direction. At the same time, the heat generated on the heating sheet 30 is also conducted to the heat-conducting film 20 through the clamping plate 21, and the heat-conducting film 20 heats the single battery 11 in the axial direction of the single battery 11. Thus, the heating sheet 30 completes the heat conduction in the axial and radial directions of the single battery 11, improves the efficiency of low-temperature heating and high-temperature heat dissipation of the cylindrical battery module, and thus improves the reliability and safety of the cylindrical battery module.

[0033] The cylindrical battery module of the present application uses the combination of the clamping plate 21, the heating sheet 30, and the heat-conducting film 20 to heat and dissipate heat for the battery pack 10, and respectively heats or dissipates heat for the single battery 11 in the radial and axial directions, thereby improving the heating and heat dissipation efficiency and the compact structure. Compared with the prior art, the heating does not need to add a heat-conducting filling material in the single battery 11 for heat conduction, which not only reduces the volume assembly rate but also reduces the weight assembly rate.

[0034] Please refer again to Figure 1 The heating assembly further includes a plurality of heat-conducting pads 33 made of a material with excellent heat conductivity. One heat-conducting pad 33 is arranged at the end position of one single battery 11, and all the heat-conducting pads 33 are arranged below the clamping plate 21 and the heating sheet 30, that is, one side of the heat-conducting pad 33 is tightly attached to the single battery 11, and the other side is tightly attached to the clamping plate 21. Thus, the heating sheet 30 can positively heat the battery pack 10 through the clamping plate 21 and the heat-conducting pad 33, increase the effective contact area of the heating sheet 30 and the single battery 11, and thus enhance the heat conduction efficiency of the heating sheet 30 and the single battery 11.

[0035] Further, the heating assembly further includes a cable electrically connected with the heating sheet 30, and the cable is connected with the edge of the heating sheet 30. The battery pack 10 or the backup power supply can energize the heating sheet 30 through the cable to heat the heating sheet 30.

[0036] Still further, a plurality of electrode holes 31 are formed in the heating sheet 30, and the heat-conducting pad 33 is in the shape of a circular ring and has a through hole formed in the thickness direction, and the electrode hole 31 and the through hole are in communication. The positive electrode lug of the single battery 11 is arranged in the electrode hole 31, so that the positive electrode lug of the single battery 11 is exposed outside, and then the positive electrode lug can be sequentially connected in series, without the need to arrange a wire inside, thereby solving the problem of wire aging and improving the service life of the cylindrical battery module.

[0037] In addition, the heating sheet 30 is provided with a fixing hole 32, and the heating sheet 30 is fixedly installed on the clamping plate 21 through a rivet penetrating through the fixing hole 32, so that the heating sheet 30 is stably fixed on the clamping plate 21, and the fixing mode of the rivet can make the heating sheet 30 tightly contact with the clamping plate 21, facilitate heat conduction between the two, improve the heating efficiency, and further guarantee the working performance of the cylindrical battery module.

[0038] In an embodiment, the clamping plate 21 is arranged between the heating sheet 30 and the battery pack 10, the clamping plate 21 is provided with a mounting hole 22 corresponding to the electrode hole 31, and a heat-conducting pad 33 is arranged in the mounting hole 22, and the mounting hole 22 can fix the heat-conducting pad 33. In terms of heat conduction of the single battery 11, the heat-conducting pad 33 serves as a heat transfer medium to transfer the heat of the single battery 11 to the clamping plate 21. One end of the heat dissipation film is in close contact with the clamping plate 21, so that the heat dissipation film and the clamping plate 21 can transfer heat, so that the clamping plate 21 absorbs the heat generated by the single battery 11 in the axial and radial directions. Similarly, the heat generated by the heating sheet 30 can also be conducted to the single battery 11 in the opposite direction.

[0039] Further, after the surface of the clamping plate 21 is oxidized, an insulating paint with an insulating effect is coated on the clamping plate 21, so that the clamping plate 21 has insulation. The clamping plate 21 is insulated from the battery pack 10 and the heating sheet 30, and the battery pack 10 and the heating sheet 30 are isolated, so as to avoid the two being electrified and affecting the working performance of the battery pack 10, thereby improving the reliability of the cylindrical battery module.

[0040] Further, the heat-conducting film 20 includes a graphene sheet and a sponge, and the sponge is wound on the top of the graphene sheet. In this embodiment, the graphene sheet is in interference fit with the clamping plate 21 through the sponge by using the compressible and resilient characteristics of the sponge, so that the graphene sheet is in close contact with the clamping plate 21, and the heat conduction efficiency between the two is improved. When the battery pack 10 needs to dissipate heat, the graphene sheet absorbs heat from the single battery 11 and transfers the heat to the clamping plate 21, and the clamping plate 21 exchanges heat with the air in convection. Conversely, when the battery pack 10 needs to be heated, the heating sheet 30 is electrified to heat, and the heat on the heating sheet 30 is transferred to the clamping plate 21, and the clamping plate 21 conducts the heat to each single battery 11 in the opposite direction through the graphene sheet.

[0041] Optionally, the battery pack 10 further includes a busbar 12, and the busbar 12 is provided with a conductive layer arranged in a series mode. The busbar 12 is arranged at the end position of the battery pack 10 away from the heating sheet 30, that is, the conductive layer of the busbar 12 sequentially connects the negative tabs of all the single batteries 11 to form a battery module with a large voltage.

[0042] The above-described embodiments only express several implementation manners of the utility model, the description is more specific and detailed, but can not therefore be understood as the limitation of the utility model patent range. It should be pointed out that for ordinary skilled person in the art, without departing from the utility model concept, several modifications and improvements can be made, which belong to the protection range of the utility model. Therefore, the protection range of the utility model patent should be subject to the appended claims.

Claims

1. A cylindrical battery module, characterized in that, include: The battery pack includes individual cells arranged in a co-directional array. A heat dissipation assembly includes a clamping plate and a thermal conductive film. The thermal conductive film is disposed around the outer side of the individual battery cell. The clamping plate is disposed at one end of the battery pack. One end of the thermal conductive film is in close contact with the clamping plate. and A heating assembly, comprising a heating element disposed on one side of the clamping plate.

2. The cylindrical battery module according to claim 1, characterized in that, The heating assembly also includes several thermal pads, one of which is disposed at the end of a single battery cell, and all of which are disposed below the clamping plate. The heating element transfers heat to the battery pack through the clamping plate and the thermal pads.

3. The cylindrical battery module according to claim 1, characterized in that, The battery pack also includes a busbar, which is located at the end of the battery pack away from the heating element, and the busbar is connected in series with the end of each individual battery cell.

4. The cylindrical battery module according to claim 2, characterized in that, The heating element has several electrode holes, the thermal pad is annular, and the thermal pad has a through hole along its thickness direction. The electrode holes and the through hole are connected to each other, and one electrode of the single cell is disposed in the electrode hole.

5. The cylindrical battery module according to claim 4, characterized in that, The clamp plate has mounting holes corresponding to the electrode holes, and the thermal pad is disposed in the mounting holes.

6. The cylindrical battery module according to claim 1, characterized in that, The heating assembly also includes a cable that is electrically connected to the heating element and is connected to the edge of the heating element.

7. The cylindrical battery module according to claim 1, characterized in that, The outer side of each individual cell is in close contact with the outer side of its adjacent individual cell.

8. The cylindrical battery module according to claim 5, characterized in that, The thermally conductive film includes a graphene sheet and a sponge. The sponge is wound around the top of the graphene sheet, and the top of the graphene sheet is interference-fitted with the clamping plate through the sponge.

9. The cylindrical battery module according to claim 5, characterized in that, The clamping plate is made of aluminum alloy and is coated with insulating varnish, which insulates the clamping plate from the battery pack and the heating element, respectively.

10. The cylindrical battery module according to claim 5, characterized in that, The heating element is provided with fixing holes, and the heating element is fixedly installed on the clamp plate by rivets passing through the fixing holes.

Images