CN218569029U

CN218569029U - Battery core, battery module and battery pack

Info

Publication number: CN218569029U
Application number: CN202222909130.XU
Authority: CN
Inventors: 李大星; 周红权; 燕正保
Original assignee: Hubei Eve Power Co Ltd
Current assignee: Hubei Eve Power Co Ltd
Priority date: 2022-11-02
Filing date: 2022-11-02
Publication date: 2023-03-03
Anticipated expiration: 2032-11-02

Abstract

The utility model belongs to the technical field of the battery, a electricity core, battery module and battery package are disclosed. The battery cell comprises a shell and a blue film, wherein the blue film is coated outside the shell, a first window is coated on the blue film on a first side surface of the shell, a first colloid is arranged on the first side surface corresponding to the first window, and the first colloid is used for bonding with an adjacent battery cell. Above-mentioned electric core sets up first window on electric core cladding's blue membrane to with the coating of first colloid on the electric core that first window corresponds, improved the adhesion between first colloid and the electric core, and then improved the joint strength between the adjacent electric core.

Description

Battery core, battery module and battery pack

Technical Field

The utility model relates to a battery technology field especially relates to an electricity core, battery module and battery package.

Background

At present, the battery cores of modules in most of domestic PACK battery systems are completely coated with blue films, and the purpose of coating the blue films is to insulate the battery cores. To the battery module who comprises a plurality of electric cores, generally bond through the structure glue between the adjacent electric core, but because blue membrane surface is comparatively smooth for the adhesive force between structure glue and the blue membrane is lower, and then leads to the joint strength between the adjacent electric core not high, has reduced the fatigue life of battery module, the cracked condition of battery module probably appears even.

Therefore, it is desirable to provide a battery cell, a battery module and a battery pack to solve the above problems.

SUMMERY OF THE UTILITY MODEL

According to the utility model discloses an aspect, the utility model provides an electricity core sets up first window on electric core wrapped blue membrane to with the coating of first colloid on the electric core that first window corresponds, improved the adhesion between first colloid and the electric core, and then improved the joint strength between the adjacent electric core.

To achieve the purpose, the utility model adopts the following technical proposal:

the battery cell comprises a shell and a blue film, wherein the blue film is coated outside the shell, a first window is arranged on the blue film on a first side face of the shell, a first colloid is arranged on the first side face corresponding to the first window, and the first colloid is used for being bonded with the battery cell.

Optionally, the first window is provided with one or more first windows, and the plurality of first windows are arranged at intervals along the length direction and/or the width direction of the first side surface.

Optionally, the first windows are the same or different in shape.

Optionally, the first window is polygonal or circular.

Optionally, a ratio of an area of the first window to an area of the first side is 0.7-0.9.

Optionally, the first colloid is a structural adhesive.

Optionally, a second window is arranged on the blue film covering the bottom of the casing, and a second colloid is arranged at the bottom corresponding to the second window.

Optionally, a third window is disposed on the blue film covering the second side surface of the housing, a third colloid is disposed on the second side surface corresponding to the third window, and the second side surface is adjacent to the first side surface.

According to the utility model discloses an in another aspect, the utility model provides a battery module, structural stability is higher, difficult fracture.

the battery module comprises a plurality of battery cores in any one of the technical schemes, wherein the battery cores are sequentially stacked to form a battery core group, and the battery cores are adjacent to each other and are bonded through the first colloid.

Optionally, the electric core group is provided with a first insulating part, and the first insulating part is arranged between the side plates and the electric core group.

Optionally, still include the end plate, the end plate sets up both sides around the electric core group, the end plate with be equipped with the second insulator between the electric core group.

According to the utility model discloses a still another aspect, the utility model provides a battery pack, including battery box and any one of above-mentioned technical scheme battery module, battery module sets up in the battery box.

The utility model has the advantages that:

the utility model provides an electric core, including casing and blue membrane, blue membrane cladding is outside the casing. Set up first window on blue membrane through the cladding at the first side of casing, and first side department that corresponds at first window sets up bonding between first colloid and the adjacent electric core, directly set up first colloid on blue membrane among the prior art and compare, the bonding strength of first colloid and first side is greater than the bonding strength with blue membrane, therefore, the risk that first colloid drops has been reduced, the joint strength between the adjacent electric core has been improved, and then the cracked risk of battery module has been reduced, the structural strength of battery module has been improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention 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 for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an electrical core provided in an embodiment of the present invention;

fig. 2 is a schematic structural diagram of another electrical core provided in an embodiment of the present invention;

fig. 3 is a schematic structural diagram of another electrical core provided in an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a battery module according to an embodiment of the present invention.

In the figure:

100. an electric core; 110. a blue film; 111. a first window; 112. a third window; 120. a first side surface; 130. a pole column; 140. an explosion-proof valve; 150. a second side surface; 200. a side plate; 300. an end plate; 400. a second insulating member; 500. a CCS component; 600. and (7) covering.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; 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 in specific cases to those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation of the first and second features not being in direct contact, but being in contact with another feature between them. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating 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 embodiment, the terms "upper", "lower", "left", "right", and the like are used in the orientation or positional relationship shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

The utility model provides an electric core 100 sets up first window 111 on the blue membrane 110 of electric core 100 cladding to with the coating of first colloid on the electric core 100 that first window 111 corresponds, improved the adhesion between first colloid and electric core 100, and then improved the joint strength between the adjacent electric core 100.

Specifically, as shown in fig. 1 to 3, the battery cell 100 includes a casing and a blue film 110, the blue film 110 is coated outside the casing, and the blue film 110 is used to ensure insulation between the battery cell 100 and other structural components. The blue film 110 coated on the first side surface 120 of the case is provided with a first window 111, the first side surface 120 is provided with a first adhesive at a position corresponding to the first window 111, and the first adhesive is used for bonding with an adjacent battery cell 100. Because blue membrane 110 is comparatively smooth, when directly setting up first colloid on blue membrane 110 and realizing the bonding between two adjacent electric cores 100, first colloid drops easily, two electric cores 100 can separate after first colloid drops, can lead to the battery module fracture seriously, therefore, this embodiment sets up first window 111 through on blue membrane 110 at first side 120 of casing at the cladding, and set up first colloid on first side 120 and correspond first window 111 department, make the casing contact of first colloid and electric core 100 and not contact with blue membrane 110, the bonding strength between first colloid and electric core 100 has been improved, and then the joint strength between adjacent electric core 100 has been improved, the cracked risk of battery module has been reduced, and the security performance is higher. The first gel should have insulating properties and uniformly cover the entire area of the first window 111 to ensure the exterior insulation of the casing of the battery cell 100. Preferably, the first colloid is structural adhesive, and the structural adhesive has high strength, peeling resistance, impact resistance and simple construction process.

Further, with reference to fig. 1 to 3, one or more first windows 111 may be provided, and when a plurality of first windows 111 are provided, the plurality of first windows 111 may be provided at intervals along the length direction of the first side surface 120, and the first windows may be provided according to the length of the first side surface 120 and a required bonding area between two adjacent battery cells 100. The plurality of first windows 111 may also be disposed at intervals along the width direction of the first side surface 120, and may be disposed according to the width of the first side surface 120 and a bonding area required between two adjacent battery cells 100. Preferably, the area ratio of the total area of the first windows to the first side surface is 0.7-0.9, and exemplarily, may be 0.7, 0.8, 0.9, and the like, and may be set according to actual needs, so as to ensure the bonding strength between the adjacent electric cores.

Alternatively, the shape of the first window 111 may be set according to actual needs, such as a polygon, a circle, and the like. When the plurality of first windows 111 are disposed on the first side 120, the plurality of first windows 111 may be the same or different in shape, and may be disposed according to actual needs.

Further, a second window (not shown) is disposed on the blue film 110 covering the bottom of the housing, and a second adhesive is disposed at a position corresponding to the second window. Through setting up second window and second colloid, the bottom plate bonding of electric core 100 and battery box or battery module of being convenient for. Alternatively, the second colloid may be a structural adhesive.

Preferably, one or more second windows may be provided, and when a plurality of second windows are provided, the plurality of second windows may be provided at intervals along the length direction of the bottom, and may be provided according to the length of the bottom and the required bonding area. The plurality of second windows may be disposed at intervals in the width direction of the bottom, and may be disposed according to the width of the bottom and a required bonding area. Preferably, the area ratio of the total area of the second windows to the bottom is 0.7-0.9, and exemplarily, may be 0.7, 0.8, 0.9, etc., and is set according to actual needs to ensure the bonding strength.

Alternatively, the shape of the second window may be set according to actual needs, such as a polygon, a circle, and the like. When a plurality of second windows are arranged at the bottom, the shapes of the plurality of second windows can be the same or different, and the second windows can be arranged according to actual needs.

Further, a third window 112 is formed in the blue film 110 covering the second side surface 150 of the housing, a third adhesive is disposed on the second side surface 150 corresponding to the third window 112, the third adhesive can be used for bonding with the side plate 200, and the second side surface 150 is adjacent to the first side surface 120. Alternatively, the third colloid may be a structural adhesive.

Preferably, one or more third windows 112 may be provided, and when a plurality of third windows 112 are provided, the plurality of third windows 112 may be provided at intervals along the length direction of the second side surface 150, and may be provided according to the length of the second side surface 150 and a required bonding area. The plurality of third windows 112 may be disposed at intervals in the width direction of the second side surface 150, and may be disposed according to the width of the second side surface 150 and a desired bonding area. Preferably, the ratio of the total area of the third windows 112 to the area of the second side surface 150 is 0.7-0.9, and may be, for example, 0.7, 0.8, 0.9, etc., according to actual needs, so as to ensure the bonding strength between the second side surface 150 and the side plate 200.

Alternatively, the shape of the third window 112 may be set according to actual needs, such as a polygon, a circle, and the like. When the plurality of third windows 112 are disposed on the second side 150, the plurality of third windows 112 may be the same or different in shape, and may be disposed according to actual needs.

Further, the top of the housing is also provided with a pole 130 and an explosion-proof valve 140, wherein the pole 130 comprises a positive pole and a negative pole.

According to the utility model discloses a further aspect, the utility model provides a battery module, including a plurality of above-mentioned electric core 100, a plurality of electric core 100 pile up in proper order and form the electric core group, bond through first colloid between the adjacent electric core 100. Above-mentioned battery module structural stability is higher, difficult fracture.

Further, with continued reference to fig. 4, the battery module further includes side plates 200, the side plates 200 are disposed at the left and right sides of the electric core pack, and a first insulating member (not shown in the figure) is disposed between the side plates 200 and the electric core pack. The side plate 200 mainly functions to provide strength against an expansion force of the battery module, and the first insulating member can insulate the battery cell 100 from the side plate 200. The first insulating member may have a thermal conductivity to facilitate heat dissipation of the battery cell 100.

Further, with continued reference to fig. 4, the battery module further includes end plates 300, the end plates 300 are disposed at the front and rear sides of the electric core pack, and a second insulating member 400 is disposed between the end plates 300 and the electric core pack. The end plates 300 can provide the battery module with resistance to expansion force and provide mounting sites for components on the battery module. The second insulator 400 can insulate the battery cell 100 from the end plate 300.

Further, the battery module further comprises a CCS assembly 500, wherein the CCS assembly 500 is disposed above the battery core pack, and the CCS assembly 500 mainly functions to connect a plurality of battery cells 100 and collect the voltage and the temperature of the battery cells 100. An upper cover 600 is further arranged above the CCS assembly 500, and the upper cover 600 can be manufactured in a plastic suction mode, so that the CCS assembly 500 is insulated from the outside, and the CCS assembly 500 is protected.

According to the utility model discloses a still another aspect, the utility model provides a battery package, including battery box and foretell battery module, the battery module sets up in the battery box, and this battery package operational reliability is higher.

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. Numerous obvious variations, rearrangements and substitutions will now occur to those skilled in the art without departing from the scope of the invention. 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. The battery cell is characterized by comprising a shell and a blue film (110), wherein the blue film (110) is coated outside the shell and on a first side surface (120) of the shell, a first window (111) is arranged on the blue film (110), a first colloid is arranged on the first side surface (120) corresponding to the first window (111), and the first colloid is used for being bonded with the battery cell (100).

2. The battery cell of claim 1, wherein the first window (111) is provided with one or more windows, and a plurality of the first windows (111) are arranged at intervals along the length direction and/or the width direction of the first side surface (120).

3. The cell of claim 2, wherein the first windows (111) are identical or different in shape.

4. The electrical core of claim 1, wherein the first window (111) is polygonal or circular.

5. The electrical core of claim 1, wherein the ratio of the area of the first window (111) to the area of the first side (120) is 0.7-0.9.

6. The electrical core of claim 1, wherein the first gel is a structural gel.

7. The battery cell of claim 1, wherein a second window is formed in the blue film (110) covering the bottom of the casing, and a second adhesive is disposed at a position, corresponding to the second window, of the bottom.

8. The electric core according to any of claims 1 to 7, wherein a third window (112) is provided on the blue film (110) covering the second side surface (150) of the casing, a third glue is provided on the second side surface (150) corresponding to the third window (112), and the second side surface (150) is adjacent to the first side surface (120).

9. The battery module is characterized by comprising a plurality of battery cores according to any one of claims 1 to 8, wherein the battery cores (100) are sequentially stacked to form a battery core group, and adjacent battery cores (100) are bonded through the first adhesive.

10. The battery module according to claim 9, further comprising side plates (200), wherein the side plates (200) are disposed at left and right sides of the electric core pack, and a first insulating member is disposed between the side plates (200) and the electric core pack.

11. The battery module according to claim 9, further comprising end plates (300), wherein the end plates (300) are disposed at front and rear sides of the electric core pack, and a second insulating member (400) is disposed between the end plates (300) and the electric core pack.

12. A battery pack characterized by comprising a battery box and the battery module according to any one of claims 9 to 11, the battery module being disposed in the battery box.