CN217158355U

CN217158355U - Battery module

Info

Publication number: CN217158355U
Application number: CN202220704658.0U
Authority: CN
Inventors: 舒宽金; 李子建; 宋鹏元; 何巍; 刘金成
Original assignee: Hubei Eve Power Co Ltd
Current assignee: Hubei Eve Power Co Ltd
Priority date: 2022-03-29
Filing date: 2022-03-29
Publication date: 2022-08-09
Anticipated expiration: 2032-03-29

Abstract

The utility model relates to the technical field of batteries, specifically disclose a battery module, this battery module includes the core package, utmost point ear and insulating thermal insulation spare, the link and the core package of utmost point ear are connected, insulating thermal insulation spare sets up between utmost point ear and core package, insulating thermal insulation spare includes base plate and insulating layer, the base plate has insulating function, and the butt ear has provided the holding power, avoided utmost point ear tatami defect down to appear, the protection core package is not impaled, the insulating layer setting is used for reducing the heat transfer between utmost point ear and the core package on the base plate, the insulating layer has played good thermal-insulated effect, avoid the battery module thermal runaway to appear.

Description

Battery module

Technical Field

The utility model relates to a battery technology field especially relates to a battery module.

Background

Adopt insulating adhesive tape or insulating piece to completely cut off utmost point ear and core package between utmost point ear and the core package in the present battery module usually, however adopt insulating adhesive tape parcel utmost point ear to completely cut off utmost point ear and core package's mode, insulating adhesive tape is not enough to the holding power of utmost point ear, the tatami defect appears easily in utmost point ear, lead to utmost point ear stab the core package, cause inside short circuit out of control, adopt the insulating piece to completely cut off utmost point ear and core package's mode, though can provide certain holding power to utmost point ear, avoided utmost point ear appear tatami defect down, but the insulating piece does not have good thermal-insulated effect, when battery utmost point ear position is because heavy current charge-discharge calorific capacity is great, the insulating piece can not play thermal-insulated effect, thermal out of control appears easily in the battery, the security performance is relatively poor.

Therefore, a battery module is needed to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a battery module can enough avoid utmost point ear appear down the couch defect, and the protection core package is not impaled, can play good thermal-insulated effect again, avoids appearing the thermal runaway.

In order to achieve the purpose, the utility model adopts the following technical proposal:

the utility model provides a battery module, this battery module includes:

a core package;

the lug comprises a connecting end and a leading-out end, and the connecting end is connected with the electrode of the core bag; and

the insulating and heat insulating piece is arranged between the lug and the core bag and comprises a substrate and a heat insulating layer, the substrate is made of insulating materials, the heat insulating layer is arranged on the substrate, and the heat insulating layer is used for reducing heat transfer between the lug and the core bag.

Optionally, the insulating and heat insulating member includes a first adhesive layer disposed between the heat insulating layer and the substrate, the first adhesive layer fixing the heat insulating layer on the substrate.

Optionally, the insulating and heat insulating piece further comprises a second adhesive layer, the second adhesive layer is arranged on one side, far away from the first adhesive layer, of the heat insulating layer, and the second adhesive layer fixes the insulating and heat insulating piece on the tab.

Optionally, the first adhesive layer and the second adhesive layer are made of one of acrylic glue, styrene-isoprene-styrene or block copolymer pressure-sensitive glue.

Optionally, the thicknesses of the first bonding layer and the second bonding layer are 0.005mm to 0.2 mm.

Optionally, the battery module includes the top cap, be equipped with utmost point post board on the top cap, draw forth an terminal surface of end with utmost point post board is connected, another terminal surface that draws forth the end with insulating heat insulation spare is connected.

Optionally, the heat insulation layer is made of a porous material, and the porous material is one of PE, PP, PI, a PE modified foam material, a PP modified foam material, or a PI modified foam material.

Optionally, the thickness of the thermal insulation layer is 0.25 mm-5 mm.

Optionally, the substrate has a thickness of 0.5mm to 2 mm.

Optionally, the battery module includes at least two core packs.

The utility model has the advantages that:

the utility model provides a battery module, this battery module includes: core package, utmost point ear and insulating thermal-insulated piece, the link and the core package of utmost point ear are connected, insulating thermal-insulated piece sets up between utmost point ear and core package, insulating thermal-insulated piece includes base plate and insulating layer, the base plate has insulating function, and the base plate has certain supporting role to utmost point ear, the tatami defect down has been avoided appearing to utmost point ear, the protection core package is not impaled, the insulating layer setting is used for reducing the heat transfer between utmost point ear and the core package on the base plate, the insulating layer has played good thermal-insulated effect, avoid the battery module thermal runaway to appear.

Drawings

Fig. 1 is a cross-sectional view of a battery module according to an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

fig. 3 is a schematic structural view of a battery module before an insulating member is installed in an embodiment of the present invention;

fig. 4 is a schematic structural view of the battery module after the insulating member is installed in the embodiment of the present invention;

fig. 5 is a schematic structural view of the battery module after core assembly according to the embodiment of the present invention;

fig. 6 is a schematic structural view of the battery module after being housed in the housing according to the embodiment of the present invention.

In the figure:

100. a core package; 200. a tab; 300. an insulating and heat-insulating member; 310. a substrate; 320. a thermal insulation layer; 330. a first adhesive layer; 340. a second adhesive layer; 410. a housing; 420. a top cover; 421. a polar plate.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Where the terms "first position" and "second position" are two different positions, and where a first feature is "over", "above" and "on" a second feature, it is intended that the first feature is directly over and obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

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 with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

As shown in fig. 1 and 2, the present embodiment provides a battery module including a core package 100, a tab 200, and an insulating and heat-insulating member 300, wherein the tab 200 includes a connection end and a lead-out end, the connection end is connected to an electrode of the core package 100, and the insulating and heat-insulating member 300 is disposed between the tab 200 and the core package 100. For example, the electrode may be a positive electrode of the battery module, or may be a negative electrode of the battery module.

As an optional scheme, the insulating member 300 in this embodiment is set to be a sheet structure, the insulating member 300 includes a substrate 310 and a thermal insulating layer 320, the substrate 310 is made of an insulating material, and the substrate 310 has certain rigidity, so that the substrate 310 can support the tab 200, and it is avoided that the tab 200 stands down to stab the core package 100 inside the battery, which causes a short circuit, the thermal insulating layer 320 is disposed on the substrate 310, the thermal insulating layer 320 can reduce heat transfer between the tab 200 and the core package 100, which is good in thermal insulating effect, and avoids the phenomenon that the core package 100 is overheated to generate thermal runaway, thereby improving the safety performance of the battery module, and the reliability is high.

Further, with continued reference to fig. 2, a first adhesive layer 330 is disposed between the thermal insulation layer 320 and the substrate 310, and the thermal insulation layer 320 can be fixed on the substrate 310 by the first adhesive layer 330. Through the arrangement of the first bonding layer 330, the heat insulation layer 320 can be firmly fixed on the substrate 310, the substrate 310 and the heat insulation layer 320 are not easy to dislocate, the risk that the insulating heat insulation piece 300 is cracked is avoided, and the fixing effect is good.

The insulating member 300 further includes a second adhesive layer 340, the second adhesive layer 340 is disposed on the side of the insulating layer 320 away from the first adhesive layer 330, and the insulating member 300 can be fixed on the end face of the lead-out end of the tab 200 by the second adhesive layer 340. On the one hand, insulating heat insulating part 300 is fixed through the mode of second tie coat 340 bonding, can be with the inseparable bonding of insulating heat insulating part 300 on the terminal surface that utmost point ear 200 draws forth the end, the displacement has been avoided taking place between utmost point ear 200 and utmost point post board 421, lead to the condition that utmost point ear 200 stabbed core package 100, and the structure is comparatively simple, and occupation space is less, on the other hand, second tie coat 340 can also adhere some remaining tiny granules of welding, it causes inside short circuit to have avoided welding remaining tiny granule to fall into core package 100, the inside short circuit risk of core package 100 has been reduced.

Alternatively, the first adhesive layer 330 and the second adhesive layer 340 in this embodiment may be made of one of acrylic glue, styrene-isoprene-styrene or block copolymer pressure-sensitive glue. Of course, in other embodiments, the first adhesive layer 330 and the second adhesive layer 340 may be made of other types of glue, which is not limited in this embodiment.

Further, the thicknesses of the first adhesive layer 330 and the second adhesive layer 340 are 0.005mm to 0.2 mm. Illustratively, the thicknesses of the first adhesive layer 330 and the second adhesive layer 340 may be set to 0.005mm, 0.01mm, 0.02mm, 0.05mm, 0.08mm, 0.1mm, 0.12mm, 0.15mm, 0.18mm, or 0.2mm, as long as sufficient adhesive force can be ensured in the first adhesive layer 330 and the second adhesive layer 340, which is not described in detail herein.

As an optional scheme, the thermal insulation layer 320 in this embodiment is made of a porous material, the porous material has many micropores inside, and has a good thermal insulation effect, and the porous material is one of PE, PP, PI, a PE modified foam material, a PP modified foam material, or a PI modified foam material. Of course, in other examples, the thermal insulation layer 320 may be made of other porous materials as long as it has good thermal insulation performance, and will not be described herein again.

Further, the thickness of the thermal insulation layer 320 in this embodiment is 0.25mm to 5 mm. Illustratively, the thickness of the thermal insulation layer 320 may be set to 0.25mm, 0.3mm, 0.5mm, 0.8mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, or 5mm, as long as the thermal insulation layer 320 has sufficient thermal insulation performance, which is not described in detail herein.

As an alternative, the substrate 310 in this embodiment may be made of PP material. Of course, in other embodiments, the substrate 310 may also be made of other insulating materials, as long as it has certain rigidity and good insulating performance, and the description thereof is omitted here.

Further, the thickness of the substrate 310 in this embodiment is 0.5mm to 2 mm. Illustratively, the thickness of the substrate 310 may be set to 0.5mm, 0.8mm, 1mm, 1.5mm, 1.8m or 2mm, which is not described in detail herein.

With reference to fig. 1, the battery module in this embodiment includes a housing 410 and a top cap 420, the core package 100 is disposed in the housing 410, the top cap 420 is provided with a pole plate 421, one end surface of the lead-out end of the pole 200 is connected to the pole plate 421, and the other end surface of the lead-out end is connected to the insulating member 300.

Alternatively, in order to reduce the occupied space of the insulating and heat insulating member 300 and increase the energy density of the battery module, the insulating and heat insulating member 300 in this embodiment may include only the heat insulating layer 320, the first adhesive layer 330 and the second adhesive layer 340, and since the heat insulating layer 320 is also made of an insulating material, the insulating and heat insulating member 300 including only the heat insulating layer 320, the first adhesive layer 330 and the second adhesive layer 340 may also perform the functions of insulation and heat insulation.

As an optional scheme, the battery module includes at least two core packages 100, so as to further improve the energy density of the battery module, and in this embodiment, two core packages 100 are taken as an example for description.

Referring to fig. 3 to 6, the method for assembling the battery module includes the steps of:

s101, connecting the connecting ends of the four tabs 200 with the two core packages 100, and connecting one end surface of the leading-out ends of the four tabs 200 with the two pole column plates 421 on the top cover 420;

s102, arranging a second bonding layer 340 on the insulating and heat-insulating piece 300 towards the other end face of the leading-out end of the tab 200, and sticking and fixing the insulating and heat-insulating piece 300 on the leading-out end of the tab 200;

s103, bending the four tabs 200 by 90 degrees towards one side provided with the insulating and heat-insulating piece 300, and merging and bundling the two core packages 100 after bending;

s104, placing the two core packages 100 into the shell 410, buckling the top cover 420 and the shell 410, and sealing the joint of the top cover 420 and the shell 410.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A battery module, comprising:

a core package (100);

the tab (200), the tab (200) comprises a connecting end and a leading-out end, and the connecting end is connected with the electrode of the core package (100); and

insulating thermal-insulated piece (300), insulating thermal-insulated piece (300) set up utmost point ear (200) with between core package (100), insulating thermal-insulated piece (300) include base plate (310) and insulating layer (320), base plate (310) adopt insulating material to make, insulating layer (320) set up on base plate (310), insulating layer (320) are used for reducing utmost point ear (200) with heat transfer between core package (100).

2. The battery module according to claim 1, wherein the insulating and heat-insulating member (300) comprises a first adhesive layer (330), the first adhesive layer (330) being disposed between the heat-insulating layer (320) and the base plate (310), the first adhesive layer (330) fixing the heat-insulating layer (320) to the base plate (310).

3. The battery module according to claim 2, wherein the insulating and heat-insulating member (300) further comprises a second adhesive layer (340), the second adhesive layer (340) being provided on the side of the heat-insulating layer (320) remote from the first adhesive layer (330), the second adhesive layer (340) fixing the insulating and heat-insulating member (300) to the tab (200).

4. The battery module according to claim 3, wherein the first adhesive layer (330) and the second adhesive layer (340) are made of one of acrylic glue, styrene-isoprene-styrene or block copolymer pressure sensitive glue.

5. The battery module according to claim 3, wherein the first adhesive layer (330) and the second adhesive layer (340) have a thickness of 0.005mm to 0.2 mm.

6. The battery module according to claim 1, wherein the battery module comprises a top cover (420), a pole plate (421) is provided on the top cover (420), one end surface of the lead-out terminal is connected with the pole plate (421), and the other end surface of the lead-out terminal is connected with the insulating and heat-insulating member (300).

7. The battery module according to any one of claims 1-6, wherein the thermal insulation layer (320) is made of a porous material, and the porous material is one of PE, PP, PI, PE modified foam material, PP modified foam material, or PI modified foam material.

8. The battery module according to any one of claims 1 to 6, wherein the thickness of the thermal insulation layer (320) is 0.25mm to 5 mm.

9. The battery module according to any one of claims 1 to 6, wherein the substrate (310) has a thickness of 0.5mm to 2 mm.

10. The battery module according to any one of claims 1 to 6, wherein the battery module comprises at least two core packs (100).