CN218783116U - Heat insulation assembly and battery module - Google Patents

Abstract

The utility model relates to a new energy battery technical field provides a thermal-insulated subassembly and battery module, thermal-insulated subassembly includes first linking bridge, second linking bridge and thermal-insulated fire-retardant cover, thermal-insulated fire-retardant cover has a plurality of mounting holes that separate each other, the mounting hole extends along the first direction, the mounting hole is used for accomodating electric core, first linking bridge, thermal-insulated fire-retardant cover and second linking bridge distribute along the first direction in proper order, first linking bridge and second linking bridge connect, with thermal-insulated fire-retardant cover spacing between first linking bridge and second linking bridge. The utility model provides a thermal-insulated subassembly and battery module even inside short circuit or outside electrical part emergence short circuit take place for electric core, thermal-insulated fire-retardant cover can be with each electric core mutual isolation, prevents the thermal runaway, reaches thermal-insulated fire-retardant effect to a new thermal-insulated effectual, the high battery module of operational safety is provided.

Description

Heat insulation assembly and Battery module

Technical Field

The utility model relates to the technical field of new energy batteries, and more particularly, to a heat insulating assembly and a battery module.

Background

With the development of new energy and energy storage industries, the requirements on the operation safety of the battery are further improved. Along with the rapid development of power batteries, the problems of heat dissipation and thermal safety of the battery module are more prominent. The reasonable heat resistance and high temperature resistance design isolation mode of a single battery cell can fully reduce the working hours on an assembly line and provide enough safety guarantee, and even if a single battery cell generates an internal short circuit, thermal runaway cannot be caused. Therefore, whether the design of the battery pack support is reasonable and whether the battery pack support and the battery cell can prevent thermal runaway from occurring is important for ensuring safety in the lithium battery pack industry.

In the correlation technique that the inventor knows, the back is accomplished in the battery module assembly, fills high temperature resistant thermal-insulated new material in the internal clearance that forms between each cylinder electricity core through at the battery module, can realize the free samming of electric core in the module, promotes the thermal safety performance of battery package. However, in the related art, after the battery module is assembled, a new high-temperature-resistant heat-insulating material filling process needs to be additionally added to increase the manufacturing cycle of the battery module, so that a new battery module with a good heat-insulating effect is urgently needed to be provided in the market.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a thermal-insulated subassembly and battery module, aim at providing a new thermal-insulated effectual, the high battery module of operational safety.

In order to achieve the purpose, the utility model adopts the technical proposal that: the utility model provides a thermal-insulated subassembly, includes first linking bridge, second linking bridge and thermal-insulated fire-retardant cover, thermal-insulated fire-retardant cover has a plurality of mounting holes that separate each other, the mounting hole extends along the first direction, the mounting hole is used for accomodating electric core, first linking bridge thermal-insulated fire-retardant cover with the second linking bridge is followed the first direction distributes in proper order, first linking bridge with the second linking bridge connects, in order to incite somebody to action thermal-insulated fire-retardant cover spacing in first linking bridge with between the second linking bridge.

In one of the embodiments, the first and second electrodes are, the heat-insulating flame-retardant sleeve is a mica sleeve.

In one embodiment, the heat-insulating flame-retardant sleeve is a silica gel sleeve.

In one embodiment, the heat-insulating and flame-retardant sleeve comprises a plurality of pipe pieces, each pipe piece is provided with one mounting hole, and the pipe pieces are arranged and combined in a preset mode.

In one embodiment, the predetermined pattern is a rectangular array among a plurality of the pipes.

In one embodiment, the preset mode is that a plurality of the pipe fittings are arranged in a staggered mode.

In one embodiment, the predetermined manner is that the plurality of pipes are respectively arrayed or staggered with each other to form a square, a cylinder or an irregular shape.

In one embodiment, the outer sidewall of each tube is interconnected to the outer sidewall of an adjacent tube.

In one embodiment, the heat-insulating flame-retardant sleeve is integrally formed.

In one embodiment, the first connecting bracket is provided with a first connecting column facing the second connecting bracket, the first connecting column is provided with a first connecting through hole, the second connecting bracket is provided with a second connecting column facing the first connecting bracket, and the second connecting column is provided with a second connecting through hole.

In one embodiment, the heat insulation assembly further comprises a fastener, and the fastener is arranged in the first connecting through hole and the second connecting through hole in a penetrating mode so as to connect the first connecting bracket and the second connecting bracket.

In one embodiment, the outer wall of the first connecting column is provided with a first reinforcing rib.

In one embodiment, the number of the first reinforcing ribs is multiple, and the multiple first reinforcing ribs are distributed at intervals along the circumferential direction of the first connecting column.

In one embodiment, the outer wall of the second connecting column is provided with a second reinforcing rib.

In one embodiment, the number of the second reinforcing ribs is multiple, and the second reinforcing ribs are distributed at intervals along the circumferential direction of the second connecting column.

In one embodiment, the end part of the first connecting column, which is close to the second connecting column, is provided with a lantern ring, the outer wall of the end part of the second connecting column, which is close to the first connecting column, is provided with a step which can be embedded into the lantern ring.

In one embodiment, the first connecting bracket is provided with a first connecting plate extending towards the second connecting bracket, the first connecting plate is provided with a clamping block, the second connecting bracket is provided with a second connecting plate extending towards the first connecting bracket, the second connecting plate is provided with a clamping hole, and the clamping block is detachably clamped in the clamping hole.

In one embodiment, the first connecting bracket is a plastic bracket.

In one of the embodiments, the first and second parts of the device, the second connecting support is a plastic support.

In one embodiment, the first connecting bracket is provided with first positioning holes corresponding to the mounting holes one by one, the first positioning hole is used for accommodating the end part of the battery core.

In one embodiment, a first limiting piece is arranged on the end face, away from the second connecting support, of the first connecting support, and the first limiting piece extends to a part of the end portion, which covers the first positioning hole.

In one embodiment, the second connecting bracket is provided with second positioning holes corresponding to the mounting holes one by one, the second positioning hole is used for accommodating the end part of the battery core.

In one embodiment, a second limiting piece is arranged on the end face, away from the first connecting support, of the second connecting support, and the second limiting piece extends to the end part of the part, which covers the second positioning hole.

In one embodiment, the mounting hole is a cylindrical hole.

In one embodiment, the thermal insulation assembly further includes two sets of current-carrying sheets, one set of the current-carrying sheets is mounted on the first connection bracket and is used for being connected with the positive electrode of the battery cell, and the other set of the current-carrying sheets is mounted on the second connection bracket and is used for being connected with the negative electrode of the battery cell.

In one embodiment, the heat insulation assembly further comprises a collecting plate, and the collecting plate is electrically connected with the two sets of current-carrying blades respectively.

In one embodiment, the collecting plate is positioned at the side part of the heat-insulating flame-retardant sleeve, and an insulating plate is arranged between the collecting plate and the heat-insulating flame-retardant sleeve.

In one embodiment, the insulating plate is an epoxy flame retardant plate.

The utility model also provides a battery module, including a plurality of electricity core and above-mentioned arbitrary one thermal-insulated subassembly, each electricity core is inserted and is located one in the mounting hole.

The utility model provides a thermal-insulated subassembly and battery module's beneficial effect is: the battery cell is inserted into the mounting hole of the heat-insulation flame-retardant sleeve, the first connecting support and the second connecting support are respectively connected from two ends of the heat-insulation flame-retardant sleeve in a folding mode, the heat-insulation flame-retardant sleeve and the battery cell are limited between the first connecting support and the second connecting support, the assembly of the battery module is completed, and an additional filling process is not needed; wherein, even inside short circuit or outside electrical part emergence short circuit take place for electric core, thermal-insulated fire-retardant cover can be with each electric core mutual isolation, prevents the thermal runaway, reaches thermal-insulated fire-retardant effect to a new thermal-insulated effectual, the operational safety is high battery module is provided.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

Fig. 1 is a schematic structural diagram of a battery module according to an embodiment of the present invention;

fig. 2 is an exploded view of the battery module in fig. 1;

fig. 3 is a schematic structural view of a heat insulating and flame retardant cover of the battery module in fig. 2;

fig. 4 isbase:Sub>A sectional view of the battery module of fig. 1 taken along linebase:Sub>A-base:Sub>A;

FIG. 5 is an enlarged view of FIG. 4 at B;

fig. 6 is a partial view of the battery module in fig. 1.

Wherein, in the figures, the various reference numbers:

10. an electric core;

100. a first connecting bracket; 110. a first connecting column; 111. a first connecting through hole; 112. a collar; 120. a first reinforcing rib; 130. first connection connecting a plate; 131. clamping block (ii) a; 140. a first positioning hole;

200. a second connecting bracket; 210. a second connecting column; 211. a second connecting through hole; 212. a step; 220. a second reinforcing rib; 230. second one a connecting plate; 231. clamping holes; 240. a second positioning hole; 250. a second limiting sheet;

300. a heat-insulating flame-retardant sleeve; 310. a pipe fitting; 311. mounting holes;

410. a fastener; 420. a nut; 430. a current-carrying sheet; 440. collecting a plate; 450. an insulating plate; 460. and a bus interface.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary intended for explaining the present invention, and should not be construed as limiting the present invention.

Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the appearances of the phrases "in one embodiment" or "in some embodiments" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The "plurality" in the present embodiment means two or more.

It is right now that the embodiment of the utility model provides an in thermal-insulated subassembly and battery module explain.

Fig. 1 is a schematic structural diagram of a battery module according to an embodiment of the present invention. Fig. 2 is an exploded view of the battery module in fig. 1. Referring to fig. 1 and fig. 2, the battery module in the present embodiment includes a plurality of battery cells 10 and any one of the following heat insulation assemblies. The shape of the battery cell 10 may be optionally cylindrical.

Wherein the heat insulation assembly comprises a first connection bracket 100, a second connection bracket 200 and a heat insulation flame-retardant jacket 300. Fig. 3 is a schematic structural view of a heat-insulating flame-retardant sheath 300. Referring to fig. 3, the heat-insulating and flame-retardant sheath 300 has a plurality of mounting holes 311 separated from each other, the mounting holes 311 extend along the first direction X, and the mounting holes 311 are used for receiving the battery cells 10. Referring to fig. 2, in the battery module, each electrical core 10 is inserted into one of the mounting holes 311.

Referring to fig. 2, the first connection bracket 100, the heat-insulating flame-retardant sheath 300 and the second connection bracket 200 are sequentially distributed along the first direction X, and the first connection bracket 100 is connected to the second connection bracket 200 to limit the heat-insulating flame-retardant sheath 300 between the first connection bracket 100 and the second connection bracket 200.

Compare and adopt to fill thermal insulation material to realize that the inside of battery module is thermal-insulated, among the thermal-insulated subassembly and the battery module that this application provided, electric core 10 inserts the mounting hole 311 of locating thermal-insulated fire-retardant cover 300, first linking bridge 100 and second linking bridge 200 fold the connection from the both ends of thermal-insulated fire-retardant cover 300 respectively, with thermal-insulated fire-retardant cover 300 and electric core 10 spacing between first linking bridge 100 and second linking bridge 200, the assembly of battery module has been accomplished promptly, need not additionally to carry out the filling process again. Even electric core 10 takes place inside short circuit or outside electrical part and takes place the short circuit, thermal-insulated fire-retardant cover 300 can be with each electric core 10 mutual isolation, prevents the thermal runaway, for example place battery thermal spray, heat and ignite, reaches thermal-insulated fire-retardant effect, can alleviate the firing and the explosion of battery module to a new thermal-insulated effectual, the operational safety is high battery module is provided.

The following description focuses on the specific structure of the heat-insulating and flame-retardant sheath 300 with reference to fig. 2 and 3.

In some embodiments, the insulating flame retardant jacket 300 is a mica jacket. Wherein, mica has good heat insulation and flame retardation effects, so that the heat insulation and flame retardation sleeve 300 made of mica can resist 500 ℃ under the condition of continuous use and 850 ℃ under the condition of intermittent use, has excellent heat insulation performance, and can resist up to 1000 ℃. In addition, the voltage breakdown resistance index of the heat-insulating flame-retardant sleeve 300 is as high as 20KV/mm.

In other embodiments, the heat-insulating flame-retardant sleeve 300 is a silica gel sleeve or an epoxy flame-retardant sleeve, and has a good heat-insulating flame-retardant effect.

In an embodiment, the mounting hole 311 of the heat-insulating and flame-retardant sleeve 300 is a cylindrical hole, and is adapted to the cylindrical battery cell 10, so that the battery cell 10 can be conveniently and quickly sleeved into the heat-insulating and flame-retardant sleeve 300.

The number of the mounting holes 311 of the heat-insulating flame-retardant sheath 300 is the same as that of the battery cells 10, or is greater than that of the battery cells 10. The heat-insulating and flame-retardant sheath 300 can be provided with a plurality of mounting holes 311 in various ways.

For example, referring to fig. 3, the sleeve 300 includes a plurality of tubes 310. Each pipe member 310 has a mounting hole 311, and a plurality of pipe members 310 are arranged and combined in a predetermined manner. In this way, the heat-insulating and flame-retardant sleeve 300 has a plurality of mounting holes 311, which can meet the requirement that the heat-insulating assembly accommodates a plurality of battery cells 10. The plurality of pipe fittings 310 can be freely combined in a preset manner, so that the placement requirement of free combination of the plurality of battery cells 10 is met.

Optionally, the preset manner is a rectangular array among the plurality of pipe fittings 310, so that the plurality of mounting holes 311 and the plurality of battery cells 10 are distributed in a rectangular array, for example, in an arrangement manner of 3X4, 4X4, and the like.

The tubes 310 in two adjacent rows may be stacked or staggered one on another, for example, referring to fig. 3, the tubes 310 in two adjacent rows are staggered and stacked, and the first left tube 310 in the second row of tubes 310 is located between the first two left tubes 310 in the first row of tubes 310. Through such a design, as many pipe members 310 as possible can be arranged in the same space in the cylindrical pipe members 310, and the space utilization of the battery module is improved.

Alternatively, the plurality of pipes 310 may be arranged in a staggered manner, for example, the plurality of pipes 310 are arranged in a line.

Optionally, the predetermined manner is that the plurality of pipes 310 are respectively arrayed or staggered with each other to form a square, a cylinder or an irregular shape. Thus, a plurality of battery cells 10 can be placed in a square, cylindrical or irregular shape.

It should be noted that the irregular shape of the present embodiment generally refers to an irregular pattern other than a regular geometric figure such as a circle, a rectangle, or a triangle.

In the present embodiment, the shape of the pipe 310 array refers to a projection shape of the plurality of pipes 310 arranged in the first direction X.

In some embodiments, the outer sidewall of each tube 310 is interconnected with the outer sidewall of an adjacent tube 310, such that the plurality of tubes 310 form a unitary body.

Alternatively, the outer sidewall of each pipe 310 is detachably connected to the outer sidewall of the adjacent pipe 310, so that a plurality of pipes 310 can be detached from each other, the number of pipes 310 of the heat-insulating and flame-retardant sleeve 300 can be adjusted according to actual use requirements, and the pipes 310 can be rearranged and combined in a preset manner.

Optionally, the tubes 310 are bonded or snapped together.

Optionally, the insulating flame retardant jacket 300 is integrally formed. That is, the plurality of pipe members 310 are integrally formed.

The specific structure of the first and second linking brackets 100 and 200 will be described.

The first and second connecting brackets 100 and 200 may be fixedly coupled to each other or detachably coupled. For example, the first and second connecting brackets 100 and 200 are bolted, snapped, or bonded together.

In some embodiments, referring to fig. 1 and 2, the first connecting bracket 100 is provided with a first connecting post 110 facing the second connecting bracket 200, the first connecting post 110 has a first connecting through hole 111, the second connecting bracket 200 is provided with a second connecting post 210 facing the first connecting bracket 100, and the second connecting post 210 has a second connecting through hole 211. In this manner, the first and second connection brackets 100 and 200 are connected to each other through the first and second connection through holes 111 and 211.

Specifically, the insulation assembly further includes a fastener 410. The fastening member 410 is inserted into the first coupling through-hole 111 and the second coupling through-hole 211 to couple the first coupling bracket 100 with the second coupling bracket 200.

Optionally, the fastener 410 is a bolt. At least one of the first and second connection through holes 111 and 211 is a threaded hole that is threadedly engaged with the bolt. Alternatively, the insulation assembly further includes a nut 420 that mates with the bolt. The fastening member 410 is threadedly coupled to the nut 420 after passing through the first and second coupling through- holes 111 and 211.

Optionally, the outer wall of the first coupling post 110 is provided with a first reinforcing rib 120 to enhance the strength of the first coupling post 110, so as to enhance the coupling stability between the first coupling bracket 100 and the second coupling bracket 200.

Specifically, the number of the first reinforcing beads 120 is plural. The plurality of first reinforcing beads 120 are spaced apart along the circumference of the first coupling post 110 to improve the uniformity of strength of the first coupling post 110 in all directions.

Specifically, the first reinforcing bead 120 extends in the first direction X.

Similarly, the outer wall of the second connecting column 210 may be optionally provided with second reinforcing ribs 220 to enhance the strength of the second connecting column 210. The number of the second reinforcing ribs 220 may be plural, and the plural second reinforcing ribs 220 are spaced apart from each other in the circumferential direction of the second connecting column 210. The second reinforcing beads 220 may selectively extend in the first direction X.

In an embodiment, referring to fig. 4 and 5, a collar 112 is disposed at an end of the first connecting post 110 close to the second connecting post 210, and a step 212 capable of being embedded in the collar 112 is disposed on an outer wall of an end of the second connecting post 210 close to the first connecting post 110. So, when first spliced pole 110 and second spliced pole 210 counterpoint, lantern ring 112 cup joints step 212, realizes the location, and the fastener 410 of being convenient for can wear to establish through first connecting hole 111 and second connecting hole 211 accurately.

In some embodiments, the first linking bracket 100 may optionally snap into engagement with the second linking bracket 200.

For example, referring to fig. 1 and 6, the first connecting bracket 100 is provided with a first connecting plate 130 extending toward the second connecting bracket 200. The first connecting plate 130 is provided with a latch 131. The second connecting bracket 200 is provided with a second connecting plate 230 extending toward the first connecting bracket 100. The second connecting plate 230 is provided with a catching hole 231. The latch 131 is detachably engaged with the latch hole 231 to detachably connect the first connecting bracket 100 and the second connecting bracket 200.

In this embodiment, the first connecting bracket 100 is a plastic bracket.

In this embodiment, the second connecting bracket 200 is a plastic bracket.

In one embodiment, referring to fig. 1 and fig. 2, the first connecting bracket 100 is provided with first positioning holes 140 corresponding to the mounting holes 311 one by one, and the first positioning holes 140 are used for accommodating end portions of the battery cells 10. In this way, when the first connection bracket 100 and the second connection bracket 200 are aligned, the first positioning hole 140 circumferentially positions one end of the battery cell 10.

Specifically, the end surface of the first connecting bracket 100 away from the second connecting bracket 200 is provided with a first limiting piece, and the first limiting piece extends to a part of the end portion covering the first positioning hole 140. The first limiting piece can abut against one end of the battery cell 10 to axially position one end of the battery cell 10.

Similarly, referring to fig. 2 and fig. 6, the second connecting bracket 200 is provided with second positioning holes 240 corresponding to the mounting holes 311 one by one, and the second positioning holes 240 are used for accommodating the end portions of the battery cells 10 so as to circumferentially position the other end portions of the battery cells 10.

Similarly, the end surface of the second connecting support 200 away from the first connecting support 100 is provided with a second limiting piece 250, and the second limiting piece 250 extends to a part of the end portion shielding the second positioning hole 240, so as to axially position the other end portion of the battery cell 10.

The remaining specific structure of the insulation assembly is described below.

In one embodiment, please refer to fig. 1 and fig. 2, the thermal insulation assembly further includes two current-carrying sheets 430, wherein one current-carrying sheet 430 is mounted on the first connecting support 100 for connecting with the positive electrode of the battery cell 10, and the other current-carrying sheet 430 is mounted on the second connecting support 200 for connecting with the negative electrode of the battery cell 10. Thus, the current-carrying chip 430 is connected in parallel to the plurality of battery cells 10.

Optionally, the current tab 430 is welded to the positive electrode face of the battery cell 10 or the negative electrode face of the battery cell 10.

Optionally, current carrying tab 430 is a copper nickel tab.

In one embodiment, referring to fig. 1 and 2, the insulation assembly further includes a collection panel 440. The collecting plate 440 is electrically connected to the two current-carrying pads 430. The collection board 440 is used to collect the voltage of the current carrying tabs 430 and then connected to the battery management system.

Specifically, the collection board 440 is connected to the battery management system through a bus interface 460.

Specifically, the collecting plate 440 is fixed to the current-carrying blade 430 by screws, and simultaneously, transmits an electrical signal by screws.

Referring to fig. 1 and 2, the collection plate 440 is located at the side of the insulating flame-retardant sheath 300. An insulating plate 450 is disposed between the collection plate 440 and the heat-insulating flame-retardant sheath 300. The insulating plate 450 can insulate the heat-insulating flame-retardant sheath 300 from the collection plate 440, thereby achieving thermal insulation.

Optionally, the insulating plate 450 is an epoxy flame-retardant plate, and has a good heat insulation effect.

The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. The utility model provides a thermal-insulated subassembly, its characterized in that includes first linking bridge, second linking bridge and thermal-insulated fire-retardant cover, thermal-insulated fire-retardant cover has a plurality of mounting holes of separating each other, the mounting hole extends along the first direction, the mounting hole is used for accomodating electric core, first linking bridge thermal-insulated fire-retardant cover with the second linking bridge is followed the first direction distributes in proper order, first linking bridge with the second linking bridge connects, with thermal-insulated fire-retardant cover spacing in first linking bridge with between the second linking bridge.

2. The insulation assembly of claim 1, wherein: the heat-insulating flame-retardant sleeve is a mica sleeve, or the heat-insulating flame-retardant sleeve is a silica gel sleeve.

3. The insulation assembly of claim 1, wherein: the heat-insulating flame-retardant sleeve comprises a plurality of pipe fittings, each pipe fitting is provided with one mounting hole, and the pipe fittings are arranged and combined in a preset mode.

4. The insulation assembly of claim 3, wherein: the insulation assembly further comprises one of:

the preset mode is a rectangular array among a plurality of pipe fittings;

the preset mode is that a plurality of pipe fittings are arranged in a staggered mode;

the preset mode is that a plurality of the pipe fittings are respectively arrayed or mutually staggered to form a square shape, a cylindrical shape or an irregular shape.

5. The insulation assembly of claim 3, wherein: the outer side wall of each pipe is connected with the outer side wall of the adjacent pipe.

6. The insulation assembly of claim 5, wherein: the heat-insulating flame-retardant sleeve is integrally formed.

7. The insulation assembly of claim 1, wherein: first linking bridge is equipped with the orientation the first spliced pole of second linking bridge, first spliced pole has first interface hole, the second linking bridge is equipped with the orientation the second spliced pole of first linking bridge, the second spliced pole has second interface hole, thermal-insulated subassembly still includes the fastener, the fastener is worn to locate first interface hole with in the second interface hole, with first linking bridge with the second linking bridge is connected.

8. The insulation assembly of claim 7, wherein: the outer wall of the first connecting column is provided with a plurality of first reinforcing ribs which are distributed at intervals along the circumferential direction of the first connecting column;

the outer wall of the second connecting column is provided with a plurality of second reinforcing ribs, and the plurality of second reinforcing ribs are distributed at intervals along the circumferential direction of the second connecting column;

the end part of the first connecting column, which is close to the second connecting column, is provided with a lantern ring, and the outer wall of the end part of the second connecting column, which is close to the first connecting column, is provided with a step capable of being embedded into the lantern ring.

9. The insulation assembly of any of claims 1 to 8, wherein: the first connecting bracket is provided with a first connecting plate extending towards the second connecting bracket, the first connecting plate is provided with a clamping block, the second connecting bracket is provided with a second connecting plate extending towards the first connecting bracket, the second connecting plate is provided with a clamping hole, and the clamping block is detachably clamped in the clamping hole;

the first connecting bracket and/or the second connecting bracket are/is a plastic bracket;

the first connecting bracket is provided with first positioning holes which correspond to the mounting holes one by one, and the first positioning holes are used for accommodating the end parts of the battery cells;

the end face, far away from the second connecting support, of the first connecting support is provided with a first limiting piece, and the first limiting piece extends to the part of the end part, which covers the first positioning hole;

the second connecting support is provided with second positioning holes which correspond to the mounting holes one by one, and the second positioning holes are used for accommodating the end parts of the battery cells;

the end face, far away from the first connecting support, of the second connecting support is provided with a second limiting piece, and the second limiting piece extends to the end part of the part, which covers the second positioning hole;

the mounting hole is a cylindrical hole;

the heat insulation assembly further comprises two groups of current-carrying pieces, wherein one group of current-carrying pieces are arranged on the first connecting support and used for being connected with the positive electrode of the battery cell, and the other group of current-carrying pieces are arranged on the second connecting support and used for being connected with the negative electrode of the battery cell;

the heat insulation assembly further comprises a collecting plate, and the collecting plate is electrically connected with the two groups of current-carrying sheets respectively;

the collection plate is positioned on the side part of the heat-insulating flame-retardant sleeve, an insulation plate is arranged between the collection plate and the heat-insulating flame-retardant sleeve, and the insulation plate is an epoxy flame-retardant plate.

10. A battery module, its characterized in that: the thermal insulation assembly of any one of claims 1 to 9, comprising a plurality of cells, each of the cells being inserted into one of the mounting holes.

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