CN210778839U - Battery core subassembly and battery - Google Patents

Abstract

The utility model discloses a cell component, which comprises a cell body and a buffer structure; the battery cell body comprises a battery cell winding body, an electrode plate is electrically connected on the battery cell winding body, and the buffer structure wraps the connection part of the battery cell winding body and the sealing edge; use the utility model discloses an electricity core subassembly can effectively protect the junction of pole piece and the electricity core winding body, the utility model also discloses a battery.

Description

Battery core subassembly and battery

Technical Field

The utility model relates to a battery field, in particular to electric core subassembly and have its battery.

Background

In the prior polymer battery production process, a plurality of layers of materials are usually coiled into a coiled body, then a sealing edge is used for wrapping the coiled body, and a polar tab is connected to the sealing edge, so that the sealing edge is easy to break when the coiled body is subjected to external impact.

Therefore, the prior art provides a battery, which integrates a PCB (printed circuit board) of the battery with an electric core component, wraps an injection molding layer in an all-dimensional manner and leads out a connecting wire, and due to the blockage of the PCB, plastic cannot fully fill each gap in the injection molding process, so that a pole piece cannot be fully protected, and the pole piece still easily falls off when being impacted by external force.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a cell subassembly and have its battery can effectively protect the pole piece when the cell subassembly receives the impact, prevents that the pole piece from droing.

According to one aspect of the utility model, a battery cell assembly is provided, which comprises a battery cell body and a buffer structure; the electric core body comprises an electric core winding body, an electrode plate is electrically connected to the electric core winding body, and the buffer structure wraps the connection position of the electrode plate and the electric core winding body.

According to some embodiments of the utility model, the electric core subassembly includes two electric core bodies, and the opening direction on the seal limit of two electric core bodies is relative, and the buffer structure part is located between the seal limit of two electric cores.

According to some embodiments of the utility model, the electric core subassembly still includes the support, and the support is around electric core body, and buffer structure is located between support and the electric core body.

According to some embodiments of the utility model, the electric core subassembly still includes the connecting plate, and the connecting plate is located between buffer structure and the support, and the connecting plate is connected with the pole piece electricity of two electric cores.

According to some embodiments of the utility model, the one end package that the seal limit was kept away from to electric core body has buffer structure.

According to some embodiments of the invention, the thickness of the portion of the cushioning structure surrounding the junction is between 0.2mm and 1 mm.

According to some embodiments of the utility model, buffer structure is injection structure.

According to some embodiments of the utility model, the pole piece part exposes buffer structure.

According to the utility model discloses a further aspect provides a battery, including above-mentioned electric core subassembly, still include the casing, electric core subassembly is located the casing.

Further, the battery also comprises a PCB, the PCB is connected with the shell, and the PCB is electrically connected with the connecting plate.

Use the utility model discloses a cell subassembly because buffer structure parcel pole piece and the junction of cell coiling body coupling receive when the cell subassembly strikes, buffer structure can absorb most impact for the impact that the junction received is less even 0, makes the junction be difficult to the emergence fracture, has effectively improved the cell subassembly and has received the easy condition that drops of pole piece when striking.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a top view of an electrical core assembly in an embodiment of the present invention;

FIG. 2 is a cross-sectional view taken along line E-E of FIG. 1;

fig. 3 is a schematic diagram of a cell body in an embodiment of the present invention;

FIG. 4 is an enlarged view taken at II in FIG. 3;

FIG. 5 is an isometric view of an electrical core assembly in an embodiment of the present invention;

fig. 6 is an isometric view of a battery in an embodiment of the invention.

The figures contain the following reference numerals:

100. the battery cell comprises a battery cell assembly 110, a battery cell body 111, a battery cell winding body 112, a sealing edge 113, a tab 114, a pole piece 115, a joint 120, a buffer structure 130, a connecting plate 140 and a support;

200. a housing, 300, a PCB board.

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 only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does 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.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1 and 2, an electric core assembly 100 includes a battery core body 110 and a buffer structure 120; the battery cell body 110 includes a battery cell winding body 111, a pole piece 114 is electrically connected to the battery cell winding body 111, and a buffer structure 120 wraps a connection portion 115 where the pole piece 114 is connected to the sealing edge 112.

Use electric core subassembly 100 of this embodiment, because buffer structure 120 parcel pole piece 114 and the junction 115 that electric core winding body 111 is connected, when electric core subassembly 100 receives the striking, buffer structure 120 can absorb most impact for the impact that junction 115 received is less or even 0, makes junction 115 be difficult to the emergence fracture, has effectively improved the easy condition that drops of pole piece when electric core subassembly 100 receives the striking.

Referring to fig. 3 and 4, the cell body 110 includes a cell winding body 111 formed by winding a plurality of layers of materials, a sealing edge 112 surrounds the winding body and extends out of the winding body, and the sealing edge 112 extends out along three surfaces of the winding body, so that the opening direction of the sealing edge 112 is the direction of the sealing edge 112 facing the surface without extending out; wherein the sealing edge 112 is connected with a tab 113 of the cell body 110, and the tab 113 connected with the positive electrode and the tab 113 connected with the negative electrode are both connected with a pole piece 114 for charging and discharging of the cell body 110; the pole piece 114 may be made of nickel.

As shown in fig. 1 and fig. 2, in order to expand the capacity of a single cell assembly 100, so that the connection portion of the beautiful cell assembly 100 can be effectively protected, the floor area of the buffer structure 120 is saved, and the complexity of the buffer structure 120 is reduced, two cell bodies 110 can be disposed in the single cell assembly 100, the opening directions of the sealing edges 112 of the two cell assemblies 100 are opposite, and the buffer structure 120 is partially located between the sealing edges 112 of the two cells, so that the sealing edges 112 can be effectively prevented from being folded after receiving the external force.

As shown in fig. 5, in order to prevent the support assembly from falling off from the cell assembly 100, a bracket 140 may be disposed at the periphery of the cell body 110, and the buffer structure 120 is located between the bracket 140 and the cell body 110.

In order to prevent the problems of insufficient pole piece length and strength reduction caused by excessive bending of the pole piece due to the fact that the pole piece is directly connected with the battery PCB, a connecting plate 130 can be arranged between the buffer structure 120 and the support 140, and the connecting plate 130 is electrically connected with the pole pieces 114 of the two battery cells.

In order to enhance the impact resistance of the electric core assembly 100, a buffer structure 120 may be wrapped at an end of the electric core body 110 away from the sealing edge 112, and the impact resistance of the electric core assembly 100 may be further enhanced by the cooperation of the two buffer structures 120.

As shown in fig. 2, in order to ensure that the buffer structure 120 can sufficiently absorb the impact propagating toward the connection position 115 without greatly affecting the length of the electric core assembly 100, the thickness of the portion of the buffer structure 120 covering the connection position 115 is 0.2mm to 1mm, and the thickness direction is referred to herein as the direction of the electric core winding body 111 toward the buffer structure 120.

Further, the buffer structure 120 may be an injection molded structure.

In electric core subassembly 100 production process, can directly mould plastics corresponding part after each part is fixed with electric core subassembly 100, guarantee that buffer structure 120 can fully wrap up junction 115, under the prerequisite that electric core subassembly 100 possesses support 140, can directly mould plastics in the space between support 140 and the electric core, reduce the use of mould.

In order to prevent the battery cell body 110 from being overheated and exploded due to overhigh plastic temperature during injection molding, a low-temperature injection molding process can be adopted for injection molding, and the injection molding temperature is controlled to be 60-100 ℃.

As shown in fig. 2, in order to facilitate the connection of the pole piece to the connection plate 130, the pole piece may be partially exposed from the buffer structure 120.

According to another aspect of the present embodiment, a battery is provided, which includes the above-mentioned battery cell assembly 100, and further includes a housing 200, wherein the battery cell assembly 100 is located in the housing 200.

Further, in order to manage the charging and discharging operations of the electric core assembly 100 and prevent the battery from being excessively charged and discharged to affect the service life, the PCB 300 may be connected to the housing 200, and the PCB 300 is electrically connected to the connection plate 130; so that the charging and discharging operations of the cell assembly 100 are uniformly controlled by the control device on the PCB 300.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the gist of the present invention within the knowledge range of those skilled in the art.

Claims (10)

1. A cell assembly (100) comprising a cell body (110) and a buffer structure (120); the battery cell body (110) comprises a battery cell winding body (111), an electrode plate (114) is electrically connected to the battery cell winding body (111), and the buffer structure (120) wraps a joint (115) where the electrode plate (114) is connected with the battery cell winding body (111).

2. The battery pack assembly (100) of claim 1, comprising two of the cell bodies (110), wherein the opening directions of the sealing edges of the two cell bodies (110) are opposite, and the buffer structure (120) is partially located between the sealing edges of the two cells.

3. The battery pack assembly (100) of claim 2, further comprising a bracket (140), wherein the bracket (140) surrounds the cell body (110), and the buffer structure (120) is located between the bracket (140) and the cell body (110).

4. The electric core assembly (100) according to claim 3, further comprising a connecting plate (130), wherein said connecting plate (130) is located between said buffer structure (120) and said bracket (140), said connecting plate (130) being electrically connected to said pole pieces (114) of two of said electric cells.

5. The battery pack assembly (100) of claim 1, wherein an end of the battery cell body (110) away from the edge of the seal is wrapped with a buffer structure (120).

6. The electric core assembly (100) according to claim 1, wherein the thickness of the portion of the buffer structure (120) covering the junction (115) is 0.2mm-1 mm.

7. The electric core assembly (100) according to claim 1, wherein said buffer structure (120) is an injection molded structure.

8. The electric core assembly (100) according to claim 1, wherein said pole piece (114) is partially exposed from said buffer structure (120).

9. A battery comprising the electric core assembly (100) of claim 1, and further comprising a housing (200), wherein the electric core assembly (100) is located in the housing (200).

10. The battery according to claim 9, further comprising a PCB board (300), wherein the PCB board (300) is connected with the case (200), and the PCB board (300) is electrically connected with a connection board (130).

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