CN211088325U - Heat-shrinkable tube and battery module - Google Patents

Abstract

The utility model relates to a battery technology field provides a heat shrinkage bush and battery module, and heat shrinkage bush includes the body, and the body has the holding chamber, has seted up a plurality of through-holes on the lateral wall of body, and each through-hole sets up side by side and all is linked together with the holding chamber. The body has the characteristic of thermal contraction setting, packs into the body with the battery after the lamination to, put into and carry out the contraction setting under the hot air circumstance, at this moment, with each battery rigidity, prevent that its inflation and lead to the interval increase between each battery, when utmost point ear welding process, prevent that it from being pulled apart, and, when transferring the battery in the back process, also need not to change spacing frock, reduction frock use cost. Meanwhile, the tube body also has the insulating characteristic, and can effectively provide insulation for each battery. The battery and the outside are conducted through the through holes, and the heat dissipation efficiency of the battery is improved under the action of the heat-conducting glue.

Description

Heat-shrinkable tube and battery module

Technical Field

The utility model relates to a battery technology field especially provides a heat shrinkage bush and have this heat shrinkage bush's battery module.

Background

Due to the unique advantages of the soft package battery, the soft package battery is more and more widely applied to the power battery industry. The mode that laminate polymer battery is in groups is also more and more abundant, and the majority utilizes other structures or material to strengthen laminate polymer battery's structure, realizes many batteries simultaneously and organizes the function. At present, more and more battery enterprises adopt the German automobile industry association standard to produce a new-generation battery module, the battery module is a module with a specified size formed by connecting a plurality of soft package batteries in series and parallel and adding an alloy aluminum shell, and the battery module has the advantages of fixed size and simple structure and provides possibility for subsequent automatic assembly.

Specifically, the process comprises the following steps: utilize the structure to glue between each laminate polymer battery and bond for the multi-disc battery forms a whole, simultaneously, piles up the in-process at the battery and participates in the bubble cotton that has the buffering guard action between each laminate polymer battery, welds utmost point ear again, at last, installs into in the aluminum alloy casing. However, after the tab is welded, during the process that the tool for fixing is loosened to the battery casing, the expansion of the compressed foam causes the space between the battery cells to be enlarged, and the welded tab is damaged. Therefore, the problem that the tab is easy to be torn in the manufacturing process of the conventional battery module needs to be solved.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a pyrocondensation sleeve aims at solving the easy problem that is cracked of the utmost point ear that current battery module appears in the manufacturing process.

In order to achieve the above object, the utility model adopts the following technical scheme: the utility model provides a heat-shrinkable sleeve, is including having insulating and pyrocondensation's body, and the body has the holding chamber that is used for holding the battery of lamination state, offers a plurality of through-holes that are used for holding heat-conducting glue on the lateral wall of body, and each through-hole sets up side by side and all is linked together with the holding chamber.

As used herein, "a number" refers to an integer of 2 and more, as follows.

The utility model has the advantages that: the utility model provides a heat-shrinkable sleeve, it itself has the characteristic of being heated the shrink and stereotype, pack into the pipe body with the battery after the stack to, put into under the hot air circumstance and contract the setting, at this moment, with each battery rigidity, prevent its inflation and lead to the interval increase between each battery, like this, when utmost point ear welding process, prevent that it from being pulled apart, and, when shifting the soft packet battery in the back process, also need not to change spacing frock, reduction frock use cost. Meanwhile, the tube body also has insulating characteristics, so that insulation maintenance can be effectively provided for each battery. And each through-hole battery is conducted with the outside, and the heat dissipation efficiency of the soft package battery is improved under the action of the heat-conducting glue.

In one embodiment, the sidewall of the tube body is further provided with openings corresponding to the positive electrode and the negative electrode for leading out the battery, and the openings are communicated with the accommodating cavity.

By adopting the technical scheme, when the tab welding is carried out after the thermal shrinkage and setting of the tube body of each battery, the tab can be penetrated through the hole to carry out the tab welding process.

In one embodiment, the length of the tube is greater than the thickness of the stacked cells; alternatively, the length of the tube is greater than the length of the battery.

By adopting the technical scheme, the size of the heated tube body can shrink, so that when the stacked batteries are arranged along the axial direction of the tube body, the length of the tube body is larger than the thickness of the stacked batteries so as to ensure that all the batteries can be wrapped; or, when the stacked batteries are arranged along the radial direction of the tube body, the length of the tube body should be greater than that of the batteries.

In one embodiment, the cross section of the tube body along the radial direction is rectangular, and a plurality of through holes are formed in the bottom end surface of the tube body.

In one embodiment, the remaining end surface of the tube body is provided with a plurality of through holes.

Through adopting above-mentioned technical scheme, further improve the area of contact between heat-conducting glue and each laminate polymer battery, improve laminate polymer battery's radiating efficiency.

In one embodiment, the through-hole is a rectangular hole having a hole-shaped profile identical to the end-face profile of the battery.

Through adopting above-mentioned technical scheme, because the battery is the cube structure mostly, the terminal surface phase-match of rectangular hole and battery looks for area of contact between heat conduction glue and the laminate polymer battery is bigger, more is favorable to the battery heat dissipation.

In one embodiment, the through-hole is an elliptical hole.

Through adopting above-mentioned technical scheme, on the same way, the oval hole can improve area of contact between heat conduction glue and the battery equally, improves the radiating efficiency of each battery promptly.

The utility model also provides a battery module, including a plurality of range upon range of batteries, be equipped with the flexible piece that has the cushioning effect between each battery, still include foretell heat shrinkage bush, heat shrinkage bush's holding intracavity has held a plurality of range upon range of batteries.

The utility model has the advantages that: the utility model provides a battery module utilizes heat shrinkage bush to carry out spacing design to each lamination battery, avoids when utmost point ear welding process, and it is spacing because of each battery lacks the frock, and leads to utmost point ear to draw the problem of splitting. The battery module manufacturing procedure of this application still less, production efficiency is higher to, reduce and use the frock, the cost is lower.

In one embodiment, the battery module further includes a metal shell, the metal shell is sleeved on the heat-shrinkable sleeve, and a layer of heat-conducting glue is disposed between the metal shell and each through hole of the heat-shrinkable sleeve.

Through adopting above-mentioned technical scheme, utilize the heat conduction glue to loose the outside through metal casing with the work heat production of electricity core.

In one embodiment, the battery module further comprises two tab holders, which are respectively disposed at opposite ends of the battery and are disposed in the heat shrinkable sleeve.

The lug support is provided with lug through holes, the lugs of the batteries penetrate through the lug through holes, the lug support is used for supporting and separating adjacent lugs, and the lug support is used for connecting lugs with the same polarity of the batteries, so that the collected output is realized. Likewise, the heat-setting characteristics of the heat-shrinkable sleeve are used to secure the two series rows between the two ends of the cell.

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 described 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 creative efforts.

Fig. 1 is a schematic structural diagram of a heat shrinkable sleeve according to an embodiment of the present invention;

fig. 2 is another schematic structural diagram of a heat shrinkable sleeve according to an embodiment of the present invention;

fig. 3 is a partially enlarged view of a heat dissipation structure of a heat shrinkable sleeve according to an embodiment of the present invention;

fig. 4 is a cross-sectional view of a battery module according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a battery module according to an embodiment of the present invention.

Wherein, in the figures, the respective reference numerals:

the heat-shrinkable sleeve comprises a heat-shrinkable sleeve 100, a pipe body 10, an accommodating cavity 10a, a through hole 10b, an opening 10c, a battery 200, a flexible piece 300, a metal shell 400, heat-conducting glue 500 and a tab support 600.

Detailed Description

Reference will now be made in detail to the 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 functions throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

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 implicitly indicating 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 description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

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.

Referring to fig. 1, an embodiment of the present invention provides a heat shrinkable sleeve 100 for preventing expansion of a stacked battery, so as to constrain the stacked battery in an extending direction, and further, during a subsequent tab welding process, no additional limiting tool is required.

This heat-shrinkable sleeve 100 is including having insulating nature and thermal shrinkage's body 10, and body 10 has the holding chamber 10a that is used for holding the battery of lamination state, offers a plurality of through-holes 10b that are used for holding heat-conducting glue on the lateral wall of body 10, and each through-hole 10b sets up side by side and all holds the chamber 10a and be linked together. Here, the tube body 10 is adapted to the outer shape of the stacked battery. The tube 10 itself is made of an insulating material and has poor heat dissipation performance, so that the through holes 10b are added to ensure that the working heat of each battery can be dissipated.

Here, there are two ways in which the cells are stacked, one being stacking in order along the axial direction of the tube body; and secondly, the pipe bodies are sequentially stacked along the radial direction of the pipe body. Therefore, the parallel arrangement is selected according to the actual stacking method of the batteries.

The utility model provides a heat-shrinkable sleeve 100, its own has the characteristic of the thermal contraction setting, pack into the body 10 with the battery after the stack in to, put into the hot-blast environment and contract the setting down, at this moment, with each battery rigidity, prevent its inflation and lead to the interval increase between each battery, like this, when utmost point ear welding process, prevent that it from being pulled apart, and, when shifting the battery in the back process, also need not to change spacing frock, reduction frock use cost. Meanwhile, the tube body 10 also has an insulating property, and thus, insulation retention can be effectively provided for each battery. And the battery is conducted with the outside by utilizing the through holes 10b, and the heat dissipation efficiency of the soft package battery is improved under the action of the heat-conducting glue.

Referring to fig. 2, in the present embodiment, the sidewall of the tube 10 is further provided with openings 10c for leading out the positive and negative electrodes of the battery, the openings 10c are communicated with the accommodating cavity 10a, and at this time, the stacked batteries are arranged along the axial direction of the tube 10. When each battery carries out tab welding after the thermal shrinkage shaping of the tube body 10, the position of the pole piece to be welded can be exposed through each opening 10c, and the tab penetrates through the opening 10c to carry out the tab welding process. Here, the shape and specific position of the opening 10c are not limited, and may be matched with the position to be welded of each pole piece and the shape of the tab.

In this embodiment, the length of the tube 10 is greater than the thickness of the stacked cells. It is understood that in this case, the stacked cells are arranged in the axial direction of the tube body. Since the tube body 10 shrinks in size when heated, its length should be greater than the thickness of the stacked pouch batteries to ensure that all the pouch batteries can be wrapped. Alternatively, the length of the tube body 10 is greater than the length of the layer cell. In this case, the stacked cells are arranged in the radial direction of the tube. The wrapping of each battery can also be realized.

Referring to fig. 1, preferably, the cross section of the tube 10 along the radial direction is rectangular or substantially rectangular, and a plurality of through holes 10b are formed on the bottom end surface of the tube 10. Here, the outer shape of the tube 10 having a rectangular cross section is the same as the outer shape of the stacked batteries. The bottom end surface of the tube 10 generally corresponds to the metal housing of the battery module, so that the batteries can be easily dissipated to the outside through the through holes 10 b.

Further, the rest end surfaces of the pipe body 10 are all provided with a plurality of through holes 10 b. Understandably, the through holes 10b are formed in each end face of the rectangular tube body 10, so that the contact area between the heat-conducting glue and each battery can be further increased, and the heat dissipation efficiency of the soft package battery is improved. Specifically, through holes 10b may be opened on two of the end faces, or through holes 10b may be opened on three of the end faces, or through holes 10b may be opened on four of the end faces.

Referring to fig. 1, in the present embodiment, the through hole 10b is a rectangular hole, and the hole shape profile of the rectangular hole is the same as the end surface profile of the battery. Because the battery is the cube structure mostly, the terminal surface phase-match of rectangular hole and battery for the area of contact between heat conduction glue and the laminate polymer battery is bigger, more is favorable to the battery heat dissipation. Of course, the through hole 10b may have other shapes according to actual use.

Referring to fig. 3, in another embodiment, the through hole 10b is an elliptical hole. Similarly, the oval hole can also improve the contact area between the heat-conducting glue and the battery, namely, the heat dissipation efficiency of each battery is improved.

Referring to fig. 4, the present invention further provides a battery module, which includes a plurality of stacked batteries 200, a flexible member 300 having a buffering function is disposed between the batteries 200, and the heat shrinkable sleeve 100, wherein the plurality of stacked batteries 200 are accommodated in the accommodating cavity 10a of the heat shrinkable sleeve 100. Specifically, the flexible member 300 is foam or the like.

The utility model provides a battery module utilizes heat-shrinkable sleeve 100 to carry out spacing design to each lamination battery 200, avoids when utmost point ear welding process, and it is spacing because of each battery 200 lacks the frock, and leads to utmost point ear to draw the problem of splitting. The battery module manufacturing procedure of this application still less, production efficiency is higher to, reduce and use the frock, the cost is lower.

Referring to fig. 4 and 5, in the present embodiment, the battery module further includes a metal housing 400, the metal housing 400 is sleeved on the heat-shrinkable sleeve 100, and a layer of heat-conducting glue 500 is disposed between the metal housing 400 and each through hole 10b of the heat-shrinkable sleeve 100. It is understood that the thermal conductive paste 500 can accelerate the thermal conduction between the batteries 200 and the metal case 400, so that the heat generated by the operation of each battery 200 is dissipated to the outside through the metal case 400.

Referring to fig. 4 and 5, in the present embodiment, the battery module further includes two tab holders 600, and the two tab holders 600 are respectively disposed at two opposite ends of the battery 200. In the existing design, the lug support is an insulating lug support, lug through holes are formed in the lug support, and lugs of each battery penetrate through the lug through holes, so that the lug support supports and separates adjacent lugs. Here, the tab holder 600 is further provided with a bus bar for connecting tabs of the batteries 200, thereby realizing collective output. Similarly, the two-pole ear mount is fixed to both ends of the battery 200 by using the heat setting property of the heat shrinkable tube 100. And, when the stacked batteries 200 are arranged in the radial direction of the heat-shrinkable tube 100, the two tab holders 600 are disposed at the opposite open ends of the heat-shrinkable tube 100, respectively, and partially disposed inside the heat-shrinkable tube 100. Of course, the stacked batteries 200 may be arranged in the axial direction of the heat-shrinkable tube 100, and at this time, the two tab holders 600 are respectively disposed on the opposite side walls of the heat-shrinkable tube 100.

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. A heat-shrinkable sleeve, characterized in that: including having insulating nature and pyrocondensation nature body, the body has the holding chamber that is used for holding range upon range of attitude battery, set up on the lateral wall of body and be used for the heat-conducting rubber's of holding a plurality of through-holes, each the through-hole sets up side by side and all with the holding chamber is linked together.

2. The heat shrink sleeve of claim 1, wherein: the side wall of the tube body is also provided with an opening for leading out a positive pole and a negative pole of the battery, and the opening is communicated with the accommodating cavity.

3. The heat shrink sleeve of claim 1, wherein: the length of the tube body is greater than the thickness of the stacked batteries; or the length of the tube body is greater than that of the battery.

4. The heat shrink sleeve of claim 1, wherein: the cross section of the pipe body along the radial direction is rectangular, and a plurality of through holes are formed in the bottom end face of the pipe body.

5. The heat shrink sleeve of claim 4, wherein: the other end faces of the pipe body are provided with a plurality of through holes.

6. The heat shrink sleeve of claim 1, wherein: the through hole is a rectangular hole, and the hole-shaped outline of the rectangular hole is the same as the outline of the end face of the battery.

7. The heat shrink sleeve of claim 1, wherein: the through hole is an elliptical hole.

8. The utility model provides a battery module, includes a plurality of range upon range of batteries, each be equipped with the flexible piece that has cushioning effect between the battery, its characterized in that: the heat-shrinkable sleeve as claimed in any one of claims 1 to 7, further comprising a plurality of stacked batteries accommodated in the accommodating cavity of the heat-shrinkable sleeve.

9. The battery module according to claim 8, wherein: the battery module further comprises a metal shell, the metal shell is sleeved on the heat-shrinkable sleeve, and a layer of heat-conducting glue is arranged between the metal shell and each through hole of the heat-shrinkable sleeve.

10. The battery module according to claim 8, wherein: the battery module further comprises two tab supports, and the two tab supports are respectively arranged at two opposite ends of the battery.

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