CN219779121U

CN219779121U - Battery assembly

Info

Publication number: CN219779121U
Application number: CN202320891171.2U
Authority: CN
Inventors: 张玉汉; 周晴; 肖龙淋; 卿艳华; 刘仕臻; 吕品风
Original assignee: Zhejiang Sunwoda Electronics Co Ltd
Current assignee: Zhejiang Sunwoda Electronics Co Ltd
Priority date: 2023-04-17
Filing date: 2023-04-17
Publication date: 2023-09-29
Anticipated expiration: 2033-04-17

Abstract

The utility model relates to the technical field of batteries, in particular to a battery assembly. The battery assembly includes a cell and a PCM; the battery cell comprises a battery shell, wherein a sealing plate part is arranged at the preset end part of the battery shell, and separates the preset end part of the battery shell into a first groove and a second groove; the PCM comprises a first plate body, a second plate body and a bending part connected between the first plate body and the second plate body; the first plate body is arranged in the first groove, and the second plate body is folded into the second groove through the bending part. The predetermined end of the battery pack provides a larger space for arranging electronic components in a unit length, so that the PCM is provided with more electronic components and the dispersibility of the heating devices is improved; in addition, under the same electrical performance requirement of the PCM, the space occupied by the PCM can be reduced, thereby increasing the length of the battery case and improving the battery capacity of the battery pack.

Description

Battery assembly

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery assembly.

Background

PCM (Protection Circuit Module, a protection circuit module) is used to control the charge and discharge of a battery, and is critical to the charge and discharge safety of the battery, and currently, PCM is usually installed in a deep-pit groove of a battery head.

In order to improve the cruising ability of a mobile device powered by a battery, for example, a mobile phone, the mobile terminal generally increases the space of a battery compartment by increasing the length, width, thickness, etc. of the mobile phone, but such a scheme, although improving the battery capacity, affects the portability or the holding feeling of the mobile device. Therefore, how to realize the improvement of the battery capacity without changing the shape of the battery is a technical problem to be solved in the present day.

Disclosure of Invention

The utility model aims to provide a battery assembly, which solves the technical problem that the capacity of a battery is improved on the premise of not changing the appearance of the battery in the prior art to a certain extent.

The utility model provides a battery component, which comprises an electric core and a PCM;

the battery cell comprises a battery shell, wherein a sealing plate part is arranged at the preset end part of the battery shell, and the sealing plate part separates the preset end part of the battery shell into a first groove and a second groove;

the PCM comprises a first plate body, a second plate body and a bending part connected between the first plate body and the second plate body;

the first plate body is arranged in the first groove, and the second plate body is folded into the second groove through the bending part.

In the above technical solution, further, the edge portion of the sealing plate portion and the battery case, which are disposed at intervals, is a first free edge portion, and the bending portion bypasses the first free edge portion and is connected with the first plate body and the second plate body.

In any of the above technical solutions, further, two edges of the sealing plate adjacent to the battery case are a second free edge and a third free edge, respectively;

the bending part bypasses the second free edge part or the third free edge part to be connected with the first plate body and the second plate body.

In any of the above technical solutions, further, the bending portion is a flexible circuit board, and the bending portion is electrically connected with the first board body and the second board body respectively.

In any of the above-mentioned aspects, further, the sealing plate portion and the first plate body are bonded to each other at surfaces facing each other;

the sealing plate portion is bonded to a surface of the second plate body facing each other.

In any of the above technical solutions, further, the battery assembly further includes a first insulating layer, where the first insulating layer is laid on a surface of the battery case facing the first groove and a surface of the sealing plate facing the first groove;

the battery assembly further comprises a second insulating layer, and the second insulating layer is laid on the surface of the battery shell facing the second groove and the surface of the sealing plate part facing the second groove.

In any of the above technical solutions, further, a first adhesive layer adhered to the sealing plate portion is provided on a surface of the first insulating layer facing the sealing plate portion, and a second adhesive layer adhered to the first plate body is provided on a surface of the first insulating layer facing the first plate body;

the surface of the second insulating layer facing the sealing plate part is provided with a third adhesive layer bonded with the sealing plate part, and the surface of the second insulating layer facing the second plate body is provided with a fourth adhesive layer bonded with the second plate body.

In any of the above solutions, further, the battery assembly further includes a head gummed paper;

the battery shell comprises a first preset surface and a second preset surface which are arranged side by side with the plate surface of the sealing plate part, the PCM is coated on the middle part of the head gummed paper, and two ends of the head gummed paper are respectively adhered to the first preset surface and the second preset surface.

In any of the above technical solutions, further, the battery case is made of an aluminum plastic film, and the sealing plate portion includes two layers of the aluminum plastic films that are stacked and encapsulated relatively;

the battery cell also comprises a pole piece arranged in the battery shell, and a pole lug of the pole piece extends out between the two layers of aluminum plastic films and is electrically connected with the first plate body or the second plate body. In any of the above technical solutions, further, the number of the battery cells is plural, and the plural battery cells are sequentially arranged;

the preset end parts of the adjacent battery cells face the same direction;

the first grooves of adjacent electric cores are aligned along the arrangement direction of the electric cores, and the first plate body extends along the arrangement direction of the electric cores and penetrates through all the first grooves;

the second grooves of the adjacent electric cores are aligned along the arrangement direction of the electric cores, and the second plate body extends along the arrangement direction of the electric cores and penetrates through all the second grooves.

Compared with the prior art, the utility model has the beneficial effects that:

the battery pack provided by the utility model comprises a battery shell and a PCM. The predetermined end of the battery case is provided with a sealing plate portion, the sealing plate portion separates the predetermined end of the battery case into a first groove and a second groove, the PCM can be arranged in the first groove by configuring the PCM to comprise a first plate body, a second plate body and a bending portion connected between the first plate body and the second plate body, and the second plate body can be arranged in the second groove by folding the bending portion, so that the PCM can be accommodated in the first groove and the second groove of the battery case together.

Compared with the prior art, the technical scheme that the space is wasted only by accommodating the PCM in the pit groove is adopted, the preset end part of the battery assembly is used for providing a larger electronic component arrangement space in unit length, so that the PCM is provided with more electronic components, the dispersibility of the heating components is improved, and the electrical property of the PCM is improved; in addition, under the same electrical property requirement of the PCM, the space occupied by the PCM can be reduced, so that the length of the battery shell is increased, the battery capacity of the battery assembly is improved, and the mobile terminal applying the battery assembly is further beneficial to size optimization.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic view of a first structure of a battery assembly according to an embodiment of the present utility model;

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

FIG. 3 is a cross-sectional view of FIG. 1 at section B-B;

FIG. 4 is an enlarged view of a portion of FIG. 3 at C;

fig. 5 is a schematic view of a second structure of a battery assembly according to an embodiment of the present utility model (omitting a head gummed paper);

FIG. 6 is a partial enlarged view of FIG. 5 at D;

fig. 7 is a schematic view of a third structure of a battery assembly according to an embodiment of the present utility model;

fig. 8 is a fourth schematic structural view of a battery assembly according to an embodiment of the present utility model;

FIG. 9 is an enlarged view of a portion of FIG. 8 at E;

fig. 10 is a schematic structural diagram of a battery cell of a battery assembly according to an embodiment of the present utility model;

fig. 11 is a schematic view of a fifth structure of a battery assembly (in the case of a plurality of battery cases) according to an embodiment of the present utility model.

Reference numerals:

1-a battery assembly; 10-PCM; 100-a first plate body; 1000-a first hard circuit board; 1001-a first electronic component; 101-an integrated flexible circuit board; 1010—a bending portion; 102-a second plate body; 1020-a second rigid circuit board; 1021-a second electronic component; 11-a battery case; 110-sealing plate portion; 111-total first grooves; 1110-a first groove; 112-total second grooves; 1120-a second groove; 12-a first insulating layer; 13-a second insulating layer; 14-pole pieces; 15-nickel flakes; 16-head gummed paper.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Referring to fig. 1 to 11, an embodiment of the present utility model provides a battery assembly 1, the battery assembly 1 including a battery cell and a PCM10; the battery cell comprises a battery shell 11, wherein a sealing plate part 110 is arranged at the preset end part of the battery shell 11, and the sealing plate part 110 separates the preset end part of the battery shell into a first groove 1110 and a second groove 1120; the PCM10 includes a first plate body 100, a second plate body 102, and a bent portion 1010 connected between the first plate body 100 and the second plate body 102; the first plate body 100 is disposed in the first groove 1110, and the second plate body 102 is folded into the second groove 1120 by the bending portion 1010.

In this technical scheme, the battery pack 1 includes a battery cell including a battery case 11, and a PCM, so that the internal structure of the battery cell is protected by the battery case 11. PCM is commonly used to charge and discharge protect the cells. The sealing plate portion 110 is plate-shaped and is disposed at a predetermined end of the battery case 11, the sealing plate portion 110 divides the predetermined end of the battery case 11 into two parts, namely a first groove 1110 and a second groove 1120, and typically the first groove 1110 and the second groove 1120 are located at both sides of the sealing plate portion 110 in the thickness direction b of the battery case 11, respectively. The PCM10 includes a first plate body 100, a second plate body 102, and a bent portion 1010 connected between the first plate body 100 and the second plate body 102. The first plate body 100 is disposed in the first groove 1110, the second plate body 102 is folded into the second groove 1120 through the bending portion 1010, that is, the first plate body 100 is disposed in the first groove 1110, the second plate body 102 is disposed in the second groove 1120, and the bending portion 1010 is connected between the first plate body 100 and the second plate body 102 and is in a bent shape, so that the second plate body 102 can be folded to different sides of the sealing plate portion 110 relative to the first plate body 100. Wherein the first and second plate bodies 100 and 102 serve to dispose electronic components such that the first and second grooves 1110 and 1120 are each used to receive the PCM10.

Alternatively, the dimensions of the first and second grooves 1110 and 1120 in the thickness direction b of the battery cell may not be equal, so that the dimensions of the first and second grooves 1110 and 1120 in the thickness direction b of the battery cell can be allocated and adjusted according to the space requirements of the first and second plate bodies 100 and 102.

The battery assembly 1 can accommodate the PCM10 using a larger space than in the case where the PCM is completely disposed in the pit groove, thereby enabling the predetermined end portion of the battery case 11 to provide a larger space for the electrical components of the PCM10 per unit length on the one hand. And then the battery assembly 1 can adopt the PCM10 with more electronic components and the distance between the heating devices is increased, the heating devices can be arranged in a scattered way, the temperature rise of the battery is reduced, and the PCM10 adopted by the battery assembly 1 has better electrical performance.

On the other hand, on the premise of meeting the electrical performance requirements, the PCM10 can reduce the space size occupied by the PCM10 along the arrangement direction of the PCM10 and the battery case 11, and further release more space for the battery case 11 to use under the condition that the battery pack 1 has a certain size, so as to significantly improve the battery capacity of the battery pack 1.

On the basis, when the battery assembly 1 is applied to mobile terminals such as mobile phones, larger battery capacity can be provided in a limited space, so that the increasingly improved power consumption requirement and the increasingly improved endurance requirement can be met.

Alternatively, the battery case 11 is, for example, in a rectangular parallelepiped shape, and a predetermined end of the battery case is one end of the battery case in a predetermined direction a, wherein the predetermined direction a may be, for example, a length direction or a width direction of the battery case 11.

In an alternative of this embodiment, the edge portion of the sealing plate portion 110 spaced from the battery case 11 is a first free edge portion, and the bending portion 1010 bypasses the first free edge portion and is connected to the first plate body 100 and the second plate body 102.

In this embodiment, as shown in fig. 1 and 2, the upper side edge of the sealing plate 110 is the first free side edge in the view of fig. 1 and 2. As an alternative to the folding of the folded portion 1010, the folded portion 1010 may be provided around the first free edge portion of the sealing plate portion 110 (this is not shown in the drawings) so that the folded portion 1010 is connected between the upper side edge portion of the first plate body 100 and the upper side edge portion of the second plate body 102.

In an alternative of this embodiment, two edge portions of the sealing plate portion 110 adjacent to the battery case 11 are a second free edge portion and a third free edge portion, respectively; the bent portion 1010 is connected to the first plate body 100 and the second plate body 102 around the second free edge portion or the third free edge portion.

In this embodiment, as shown in fig. 1 and 2, the left side edge of the sealing plate 110 is the second free edge, and the right side edge of the sealing plate 110 is the third free edge, as shown in fig. 1 and 2. As an alternative to folding over the folded portion 1010, as shown in fig. 1 and 2, a case is shown in which the folded portion 1010 may be provided around the second free edge portion of the sealing plate portion 110, or the folded portion 1010 may be provided around the third free edge portion of the sealing plate portion 110 (this is not shown in the drawings).

In an alternative of this embodiment, the bending portion 1010 is a flexible circuit board, and the bending portion 1010 is electrically connected to the first board body 100 and the second board body 102 respectively.

In this solution, by configuring the bending portion 1010 as the third flexible circuit board, the bending portion 1010 not only plays a role of folding the second board body 102 with respect to the first board body 100, but also the bending portion 1010 can make the first board body 100 and the second board body 102 form an electrical connection relationship, so that the first board body 100, the first electronic component 1001 on the first board body 100, the second board body 102 and the second electronic component 1021 on the second board body 102 are conducted.

Optionally, the first board body 100 includes a first hard circuit board 1000 and a first flexible circuit board laid on the first hard circuit board 1000, the first flexible circuit board being laser welded with the first hard circuit board 1000 to form an electrical connection relationship; the second board body 102 includes a second rigid circuit board 1020 and a second flexible circuit board disposed on the second rigid circuit board 1020, the second flexible circuit board being laser welded to the second rigid circuit board 1020 to form an electrical connection relationship.

Further, according to different demands of cloth, etc., the third flexible circuit board as the bending portion 1010 may be provided separately from the first flexible circuit board or the second flexible circuit board (not shown in the drawings); alternatively, as shown in fig. 6, the third flexible circuit board, the first flexible circuit board, and the third flexible circuit board (bending portion 1010) are integrally provided to form an integrated flexible circuit board 101, that is, both ends of the integrated flexible circuit board 101 are used as the first flexible circuit board and the second flexible circuit board, respectively, and the middle portion of the integrated flexible circuit board 101 is used as the bending portion 1010.

In the alternative of the present embodiment, as shown in fig. 4 to 7, the surface of the sealing plate portion 110 and the surface of the first plate body 100 facing each other are bonded, in other words, the surface of the sealing plate portion 110 facing the first plate body 100 and the surface of the first plate body 100 facing the sealing plate portion 110 are bonded, thereby achieving the positioning installation of the first plate body 100 with respect to the first groove 1110.

As shown in fig. 4 to 7, the sealing plate portion 110 and the surface of the second plate body 102 facing each other are bonded, in other words, the surface of the sealing plate portion 110 facing the second plate body 102 and the surface of the second plate body 102 facing the sealing plate portion 110 are bonded, thereby achieving positioning mounting of the second plate body 102 with respect to the second groove 1120.

In this technical scheme, first plate body 100 and second plate body 102 are all laminated with the face of sealing plate portion 110 and are fixed mutually, not only can realize the location installation to first plate body 100 and second plate body 102, namely realize the location installation of PCM10, but also can strengthen the structural strength of sealing plate portion 110 for sealing plate portion 110 is more reliable to battery case 11's sealing effect.

In an alternative of this embodiment, as shown in fig. 6, the battery assembly 1 further includes a first insulating layer 12, where the first insulating layer 12 is laid on the surface of the battery case 11 facing the first recess 1110 and the surface of the sealing plate portion 110 facing the first recess 1110.

In this embodiment, the first insulating layer 12 is laid on the surface of the battery case 11 facing the first recess 1110 and the surface of the sealing plate portion 110 facing the first recess 1110, that is, the bottom of the first recess 1110 and the surface of the sealing plate portion 110 facing the first recess 1110 are both provided with the first insulating layer 12, so that the battery case 11 is isolated from the first plate body 100 of the PCM10 by the first insulating layer 12, and the first plate body 100 and the electronic components thereon are prevented from being shorted with the battery case 11.

As shown in fig. 6, the battery assembly 1 further includes a second insulating layer 13, and the second insulating layer 13 is laid on the surface of the battery case 11 facing the second recess 1120 and the surface of the sealing plate portion 110 facing the second recess 1120.

In this embodiment, the surface of the battery case 11 facing the second recess 1120 and the surface of the sealing plate 110 facing the second recess 1120 are both provided with the second insulating layer 13, that is, the bottom of the second recess 1120 and the surface of the sealing plate 110 facing the second recess 1120, so that the battery case 11 is isolated from the second plate body 102 of the PCM10 by the second insulating layer 13, thereby preventing the second plate body 102 and the electronic components thereon from being shorted with the battery case 11.

In an alternative of this embodiment, the surface of the first insulating layer 12 facing the sealing plate portion 110 is provided with a first adhesive layer adhered to the sealing plate portion 110, and the surface of the first insulating layer 12 facing the first plate body 100 is provided with a second adhesive layer adhered to the first plate body 100.

In this embodiment, the surface of the first insulating layer 12 facing the sealing plate 110 is provided with a first adhesive layer adhered to the sealing plate 110, and the first insulating layer 12 is adhered to the surface of the sealing plate 110 facing the first groove 1110 by the first adhesive layer, so that the first insulating layer 12 is fixed with respect to the sealing plate 110.

The surface of the first insulating layer 12 facing the first plate body 100 is provided with a second adhesive layer adhered to the first plate body 100, and the first insulating layer 12 is adhered to the surface of the first plate body 100 facing the sealing plate portion 110 through the second adhesive layer, so that the first insulating layer 12 is fixed relative to the first plate body 100.

So that the first insulating layer 12 is fixed between the first groove 1110 and the first plate body 100 by the combination of the first adhesive layer and the second adhesive layer.

On this basis, by pressing the first insulating layer 12 against the bottom of the first groove 1110 by the first plate body 100, the first insulating layer 12 can be fixed with respect to the bottom of the first groove 1110. Further, in order to make the first insulating layer 12 and the bottom of the first groove 1110 more reliably fixed, a glue layer may be added between the two to achieve adhesion therebetween.

In an alternative of this embodiment, the surface of the second insulating layer 13 facing the sealing plate portion 110 is provided with a third adhesive layer adhered to the sealing plate portion 110, and the surface of the second insulating layer 13 facing the second plate body 102 is provided with a fourth adhesive layer adhered to the second plate body 102.

In this embodiment, the surface of the second insulating layer 13 facing the sealing plate portion 110 is provided with a third adhesive layer adhered to the sealing plate portion 110, and the second insulating layer 13 is adhered to the surface of the sealing plate portion 110 facing the second groove 1120 through the third adhesive layer, so that the second insulating layer 13 is fixed with respect to the sealing plate portion 110.

The surface of the second insulating layer 13 facing the second plate body 102 is provided with a fourth adhesive layer adhered to the second plate body 102, and the second insulating layer 13 is adhered to the surface of the second plate body 102 facing the sealing plate portion 110 through the fourth adhesive layer, so that the second insulating layer 13 is fixed relative to the second plate body 102.

Similarly, by pressing the first insulating layer 12 against the bottom of the first groove 1110 by the first plate body 100, the first insulating layer 12 can be fixed with respect to the bottom of the first groove 1110. Further, in order to make the first insulating layer 12 and the bottom of the first groove 1110 more reliably fixed, a glue layer may be added between the two to achieve adhesion therebetween.

Alternatively, the first insulating layer 12, the first adhesive layer, and the second adhesive layer may be integrally provided, and similarly, the second insulating layer 13, the third adhesive layer, and the fourth adhesive layer may be integrally provided. Further, the first insulating layer 12, the first adhesive layer and the second adhesive layer which are integrally arranged may be dupont paper with double-sided adhesive, and the second insulating layer 13, the third adhesive layer and the fourth adhesive layer which are integrally arranged may be dupont paper with double-sided adhesive.

In an alternative to this embodiment, as shown in fig. 8 and 9, the battery assembly 1 further includes a head mount 16. The battery case 11 includes a first predetermined surface and a second predetermined surface disposed side by side with the plate surface of the sealing plate portion 110, the PCM10 is coated at the middle of the head gummed paper 16, and both ends of the head gummed paper 16 are adhered to the first predetermined surface and the second predetermined surface, respectively.

In this embodiment, as shown in fig. 5 and 6, one end of the head adhesive tape 16 is adhered to a first predetermined surface of the battery case 11, the middle portion of the head adhesive tape 16 bypasses the first free edge portion of the PCM10, and the other end of the head adhesive tape 16 is adhered to a second predetermined surface of the battery case 11, so that the middle portion of the head adhesive tape 16 covers the PCM10, and thus the PCM10 is protected by the head adhesive tape 16.

In addition, when the bent portion 1010 of the PCM10 is connected to the first and second plate bodies 100 and 102 by bypassing the second or third free edge, the bent portion 1010 is not in direct contact with the head gummed paper 16, thereby facilitating the shaping of the bent portion 1010 after the bonding of the head gummed paper 16 is completed.

Alternatively, one end of the head stock 16 is adhered to the first predetermined surface adjacent the edge of the PCM10, and the other end of the head stock 16 is adhered to the second predetermined surface adjacent the edge of the PCM10.

In an alternative scheme of the embodiment, the battery case 11 is made of an aluminum plastic film, and the sealing plate portion 110 includes two layers of aluminum plastic films which are stacked relatively and encapsulated; the battery assembly 1 further comprises a pole piece arranged inside the battery shell 11, and the pole lug of the pole piece 14 extends out from the space between the two layers of the aluminum plastic films and is electrically connected with the first plate body 100 or the second plate body 102.

In this technical solution, the material of the battery case 11 is an aluminum plastic film, and optionally, the battery case 11 may include one, two, three or more aluminum plastic films connected by plastic packaging. For example, as shown in fig. 10, the battery case 11 is formed by packaging one sheet of aluminum plastic film, and then one sheet of aluminum plastic film may be folded in half to obtain two layers of aluminum plastic films, edges of the two layers of aluminum plastic films are subjected to plastic packaging, and edges of the aluminum plastic films opposite to the folds are overlapped and plastic-packaged to obtain the sealing plate portion 110 (indicated by a dotted line frame in fig. 10), thereby obtaining the battery case 11. For another example, the battery case 11 includes two aluminum plastic films (not shown), and then the two aluminum plastic films are disposed opposite to each other, and then one side edge of the two aluminum plastic films is overlapped and plastic-sealed to obtain the sealing plate portion 110, and the remaining edges of the two aluminum plastic films are plastic-sealed to obtain the battery case 11.

The pole piece 14 may be, for example, a winding core or a lamination core, as shown in fig. 6, so that the pole piece 14 is protected by the battery case 11. The pole piece 14 has a tab that protrudes relative to the pole piece 14. Before plastic packaging is performed on the aluminum plastic film, the pole piece 14 is coated inside the aluminum plastic film, then the aluminum plastic film is molded and folded according to the outline of the pole piece 14, and the pole lug extends into the sealing plate portion 110 before plastic packaging after stacking, so that the pole lug extends out of the sealing plate portion 110, and the extending pole lug is electrically connected with the first plate body 100 or the second plate body 102, for example, the pole lug can be welded with the first plate body 100 or the second plate body 102 through the nickel sheet 15 in the example of fig. 6. And then, the sealing plate part 110 which is not subjected to plastic sealing after the lamination is subjected to plastic sealing, so that the tab of the pole piece 14 is fixed between two layers of aluminum plastic films of the sealing plate part 110.

The aluminum plastic film is a protective film with stronger strength, ductility and insulativity, and by configuring the battery shell 11 as the aluminum plastic film, the pole piece 14 can be insulated and protected, and the pole piece 14 is prevented from being punctured, so that the aluminum plastic film is particularly suitable for the situation that the battery core is a soft package battery core, and can be used for mobile terminals such as mobile phones.

In an alternative of the present embodiment, as shown in fig. 11, the number of the battery cases 11 is plural, and the plural battery cases 11 are arranged in sequence; the preset end parts of the adjacent battery cells face the same direction; the first grooves 1110 of adjacent cells are aligned along the arrangement direction c of the cells, and the first plate body 100 extends along the arrangement direction c of the cells and penetrates through all the first grooves 1110; the second grooves 1120 of the adjacent cells are aligned along the arrangement direction cc of the cells, and the second plate body 102 extends along the arrangement direction c of the cells and penetrates all the second grooves 1120.

In this embodiment, the number of the battery cells is plural, for example, two, three or more, and accordingly, the number of the battery cases 11 is the same as the number of the battery cells, so that the battery assembly 1 includes a plurality of the battery cases 11 arranged in sequence.

Wherein the predetermined ends of adjacent cells are oriented in unison such that the first and second recesses 1110, 1120 of all cells are oriented in unison. On this basis, the first grooves 1110 of adjacent cells are aligned along the arrangement direction c of the cells, and then the first grooves 1110 of all the cells of the battery assembly 1 are aligned along the arrangement direction c of the cells, and all the aligned first grooves 1110 are communicated, thereby forming the total first groove 111.

The second grooves 1120 of adjacent cells are aligned along the arrangement direction c of the cells, and then the second grooves 1120 of all the cells of the battery assembly 1 are aligned along the arrangement direction c of the cells, and all the aligned second grooves 1120 are communicated, thereby forming the total second groove 112.

The plurality of cells share one PCM10, the first plate body 100 of the shared PCM10 extends along the arrangement direction c of the cells and is disposed in the total first recess 111, and the first plate body 100 of the shared PCM10 extends along the arrangement direction c of the cells and is disposed in the total first recess 111.

Similarly, the second plate body 102 of the common PCM10 extends along the direction c of the arrangement of the battery cells and is disposed in the total second recess 112, and the second plate body 102 of the common PCM10 extends along the direction c of the arrangement of the battery cells and is disposed in the total second recess 112.

Therefore, the plurality of electric cores of the battery assembly 1 can share one PCM10, the occupied space of the PCM10 is further reduced, the battery capacity of each electric core is further improved, the dispersibility of heating devices of the battery assembly 1 is improved, and the temperature rise of the battery assembly 1 is controlled.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model. Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features but not others included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the utility model and form different embodiments. For example, any of the claimed embodiments can be used in any combination. The information disclosed in this background section is only for enhancement of understanding of the general background of the utility model and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.

Claims

1. A battery pack comprising a battery cell and a PCM;

2. The battery pack according to claim 1, wherein the edge portion of the sealing plate portion provided at a distance from the battery case is a first free edge portion, and the bent portion is connected to the first plate body and the second plate body by bypassing the first free edge portion.

3. The battery pack according to claim 1, wherein two edge portions of the sealing plate portion adjacent to the battery case are a second free edge portion and a third free edge portion, respectively;

4. The battery assembly of claim 1, wherein the bent portion is a flexible circuit board, and the bent portion is electrically connected to the first plate body and the second plate body, respectively.

5. The battery pack according to claim 1, wherein the sealing plate portion and the first plate body are bonded to surfaces facing each other;

6. The battery assembly of claim 5, further comprising a first insulating layer laid on a surface of the battery case facing the first groove and a surface of the sealing plate portion facing the first groove;

7. The battery pack according to claim 6, wherein a surface of the first insulating layer facing the sealing plate portion is provided with a first adhesive layer adhered to the sealing plate portion, and a surface of the first insulating layer facing the first plate body is provided with a second adhesive layer adhered to the first plate body;

8. The battery assembly of claim 1, further comprising a header release liner;

9. The battery assembly according to claim 1, wherein the battery case is made of an aluminum plastic film, and the sealing plate portion comprises two layers of the aluminum plastic films which are oppositely stacked and molded;

the battery cell also comprises a pole piece arranged in the battery shell, and a pole lug of the pole piece extends out between the two layers of aluminum plastic films and is electrically connected with the first plate body or the second plate body.

10. The battery assembly according to claim 1, wherein the number of the electric cells is plural, and the plural electric cells are arranged in sequence;

the preset end parts of the adjacent battery cells face the same direction;