CN215955366U

CN215955366U - Low-temperature environment heat preservation structure of lithium battery pack

Info

Publication number: CN215955366U
Application number: CN202120586909.5U
Authority: CN
Inventors: 马丽冰
Original assignee: Guangzhou Jieju Electronic Technology Ltd
Current assignee: Guangzhou Jieju Electronic Technology Ltd
Priority date: 2021-03-23
Filing date: 2021-03-23
Publication date: 2022-03-04
Anticipated expiration: 2031-03-23

Abstract

The utility model discloses a low-temperature environment heat-insulating structure of a lithium battery pack, which relates to the technical field of related structures for lithium batteries and comprises a shell, wherein the shell is internally provided with the lithium battery pack and a heating device, the lithium battery pack is wrapped by a heat-insulating layer, and the heating device is arranged beside the heat-insulating layer; the heating device comprises a mounting rack, wherein conductive frames are arranged on the upper side and the lower side of the interior of the mounting rack, the conductive frames are connected with electric wires, conductive pipes are arranged in the conductive frames at equal intervals, the conductive pipes are electrically connected with the conductive frames, electric heating pipes are arranged in the conductive frames, conductive heads are arranged at two ends of the electric heating pipes, and the conductive heads are movably sleeved in the conductive pipes. This low temperature environment insulation construction's beneficial effect is, through being provided with heat preservation and heating device, reaches the purpose of keeping warm and heating lithium cell group, makes lithium cell group also can normally work under microthermal environment, reduces the reliance to external environment.

Description

Low-temperature environment heat preservation structure of lithium battery pack

Technical Field

The utility model belongs to the technical field of related structures for lithium batteries, and particularly relates to a low-temperature environment heat-preservation structure of a lithium battery pack.

Background

Lithium batteries are batteries which use a nonaqueous electrolyte solution and use lithium metal or lithium alloy as a positive/negative electrode material, do not contain metallic lithium and can be charged, and have various advantages of high energy ratio, long service life, high rated voltage, high power bearing capacity and the like, so the lithium batteries are widely applied.

However, the working performance and the service life of the lithium battery are affected when the lithium battery is used in a low-temperature environment, and a specific structure for protecting the lithium battery in the low-temperature environment is not disclosed at present, so that the use requirement in the environment cannot be met, and therefore, a low-temperature protection structure for the lithium battery is urgently needed to be developed in the market to solve the problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a low-temperature environment heat-insulating structure of a lithium battery pack, which achieves the purposes of heat insulation and heating of the lithium battery pack by arranging a heat-insulating layer and a heating device, so that the lithium battery pack can normally work in a low-temperature environment, and the dependence on the external environment is reduced.

In order to solve the technical problems, the utility model is realized by the following technical scheme:

the utility model provides a low temperature environment insulation construction of lithium cell group, includes the casing, be provided with lithium cell group and heating device in the casing, the outer parcel of lithium cell group has the heat preservation, heating device sets up by the heat preservation.

Preferably, the heating device is a heating plate, and heating wires are arranged on the heating plate.

Preferably, the heating device comprises a mounting rack, conductive frames are arranged on the upper side and the lower side of the interior of the mounting rack, the conductive frames are connected with electric wires, conductive tubes are arranged in the conductive frames at equal intervals, the conductive tubes are electrically connected with the conductive frames, electric heating tubes are arranged in the conductive frames, conductive heads are arranged at two ends of each electric heating tube, the conductive heads are movably sleeved in the conductive tubes, and the conductive heads are electrically connected with the conductive tubes.

Preferably, a pressing spring is arranged in the conductive tube, the upper end of the pressing spring is fixedly connected with the inner wall of the conductive tube, and the lower end of the pressing spring is provided with a conductive connecting plate.

Preferably, the heat-insulating layer comprises a polyurethane layer, a mineral wool layer and a phenolic foam layer which are arranged in sequence from inside to outside.

Preferably, temperature-resistant epoxy glue is arranged between the polyurethane layer and the mineral wool layer and between the mineral wool layer and the phenolic foam layer.

Preferably, the housing comprises a bottom plate and side plates arranged on two sides, and edges of two sides of the bottom plate are fixedly connected with edges of lower ends of the side plates.

Preferably, the edges of the bottom plate and the side plates are provided with limit edge covering strips.

Preferably, the corners of the limit edge banding are formed with round corners.

The utility model has the following beneficial effects:

through being provided with heat preservation and heating device, the heat preservation parcel reaches basic heat preservation effect on the lithium cell earlier, and when temperature was lower, can open heating device and heat, keeps warm through the mode of heating, makes the lithium cell carry out work under the suitable temperature, reduces external environment's change and to the restriction of lithium cell working property, makes lithium cell job stabilization.

Drawings

FIG. 1 is a general view of the low-temperature environment insulation structure according to the present invention;

FIG. 2 is a schematic view of the internal structure of the heating apparatus according to the present invention;

FIG. 3 is a cross-sectional view of the insulation layer as viewed from above;

fig. 4 is a schematic view of the internal structure of the conductive tube.

In the figure: 1-shell, 2-lithium battery pack, 3-heating device, 4-heat insulation layer, 5-mounting rack, 6-conductive rack, 7-conductive tube, 8-conductive head, 9-compression spring, 10-polyurethane layer, 11-mineral cotton layer, 12-phenolic foam layer, 13-temperature-resistant epoxy glue, 14-bottom plate, 15-side plate, 16-limit edge wrapping strip, 17-fillet, 18-conductive connecting plate, 19-electrothermal tube and 20-wire.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

As shown in fig. 1-4, a low temperature environment insulation construction of lithium cell group, including casing 1, casing 1 includes bottom plate 14 and sets up curb plate 15 in both sides, the both sides edge of bottom plate 14 forms the frame form with the lower extreme edge welded fastening of curb plate 15, or bottom plate 14 and curb plate 15 roll curved the forming through the mode that adopts integrated into one piece, be provided with lithium cell group 2 and heating device 3 in casing 1, the outer parcel of lithium cell group 2 has heat preservation 4, there is heat retaining effect to lithium cell group 2, heating device 3 sets up by heat preservation 4, heat preservation 4 is used for blockking outside low temperature invasion lithium cell group 2, avoid lithium cell group 2 to expose in crossing microthermal environment.

As a first embodiment, the heating device 3 is a heating plate, heating wires are arranged on the heating plate, and generate heat after being electrified, as another embodiment, the heating device 3 may be a structure as shown in fig. 2, which includes a mounting frame 5, conductive frames 6 are arranged on the upper and lower sides inside the mounting frame 5, the conductive frames 6 are connected with electric wires 20, the electric wires 20 are connected with an external power supply, conductive tubes 7 are arranged in the conductive frames 6 at equal intervals, the conductive tubes 7 are electrically connected with the conductive frames 6, an electrothermal tube 19 is arranged in the conductive frame 7, conductive heads 8 are arranged at two ends of the electrothermal tube 19, the conductive heads 8 are movably sleeved in the conductive tubes 7, the conductive heads 8 are electrically connected with the conductive tubes 7, the conductive frames 6, the conductive tubes 7 and the conductive heads 8 are all made of conductive metal materials, so that the electrothermal tube 19 can be electrified and generate heat after being loaded, the design is aimed at, convenient maintenance and repair, each electric heating tube 19 plays an independent role, one or part of the electric heating tubes 19 has a fault, the whole electric heating tube also has a heating effect, and the electric heating tube 19 with the fault can be disassembled for replacement, wherein, a pressing spring 9 is arranged in the conductive tube 7, the upper end of the pressing spring 9 is welded with the inner wall of the conductive tube 7, a conductive connecting plate 18 is arranged at the lower end, the conductive connecting plate 18 is also made of conductive metal materials, the contact area with the conductive head 8 can be increased, the conduction is stable, by arranging the pressing spring 9, when the electric heating tube 19 is installed or disassembled, the conductive heads 8 at the two ends can extrude the pressing spring 9, then the conductive tube 7 is smoothly arranged in the conductive tube 7 at the upper side and the lower side or is disassembled from the conductive tube 7 at the upper side and the lower side, and the abutting spring 9 can also reset to abut against the conductive head 8, thereby not influencing the conduction.

The heat preservation 4 includes polyurethane layer 10 that sets gradually from inside to outside, mineral wool layer 11 and phenolic foam layer 12, polyurethane layer 10, mineral wool layer 11 and phenolic foam layer 12 material all have high temperature resistance, and have the difficult fire, the effect of low cigarette, between polyurethane layer 10 and the mineral wool layer 11, and all be provided with temperature resistant epoxy glue 13 between mineral wool layer 11 and the phenolic foam layer 12, bond through temperature

resistant epoxy glue

13, 13 materials of temperature resistant epoxy glue have high temperature resistance effect equally, safety and reliability.

Bottom plate 14 all is provided with spacing edging 16 with curb plate 15's edge, and spacing edging 16 all has spacing effect to the outward flange of heating device 3 and heat preservation 4, makes heating device 3 and heat preservation 4 be difficult to take place to remove, and stability is good, and the corner of spacing edging 16 is formed with fillet 17, makes the corner level and smooth, is difficult to take place the scratch.

The above are only preferred embodiments of the present invention, and the present invention is not limited thereto, and any modification, equivalent replacement, and improvement made to the technical solutions described in the above embodiments, and to some of the technical features thereof, are included in the scope of the present invention.

Claims

1. The utility model provides a low temperature environment insulation construction of lithium cell group, its characterized in that, includes the casing, be provided with lithium cell group and heating device in the casing, the outer parcel of lithium cell group has the heat preservation, heating device sets up by the heat preservation.

2. The low-temperature environment thermal insulation structure of the lithium battery pack as claimed in claim 1, wherein the heating device is a heating plate, and heating wires are arranged on the heating plate.

3. The low-temperature environment heat-preservation structure of the lithium battery pack according to claim 1, wherein the heating device comprises a mounting rack, conductive frames are arranged on the upper side and the lower side inside the mounting rack, the conductive frames are connected with wires, conductive tubes are arranged in the conductive frames at equal intervals, the conductive tubes are electrically connected with the conductive frames, electric heating tubes are arranged in the conductive frames, conductive heads are arranged at two ends of each electric heating tube, the conductive heads are movably sleeved in the conductive tubes, and the conductive heads are electrically connected with the conductive tubes.

4. The low-temperature environment heat-preservation structure of the lithium battery pack as claimed in claim 3, wherein a pressing spring is disposed in the conductive tube, an upper end of the pressing spring is fixedly connected to an inner wall of the conductive tube, and a lower end of the pressing spring is provided with a conductive connection plate.

5. The low-temperature environment thermal insulation structure of the lithium battery pack as claimed in claim 1, wherein the thermal insulation layer comprises a polyurethane layer, a mineral wool layer and a phenolic foam layer which are sequentially arranged from inside to outside.

6. The low-temperature environment thermal insulation structure of the lithium battery pack according to claim 5, wherein temperature-resistant epoxy glue is arranged between the polyurethane layer and the mineral wool layer and between the mineral wool layer and the phenolic foam layer.

7. The low-temperature environment heat-preservation structure of the lithium battery pack according to claim 1, wherein the casing comprises a bottom plate and side plates arranged on two sides, and edges of two sides of the bottom plate are fixedly connected with edges of lower ends of the side plates.

8. The low-temperature environment heat-preservation structure of the lithium battery pack as claimed in claim 7, wherein the edges of the bottom plate and the side plates are provided with limit edge strips.

9. The low-temperature-environment thermal insulation structure of the lithium battery pack as claimed in claim 8, wherein the edge of the edge-limiting strip is formed with a rounded corner.