CN217009488U - Laminate polymer battery group and electronic equipment - Google Patents
Laminate polymer battery group and electronic equipment Download PDFInfo
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- CN217009488U CN217009488U CN202123176359.9U CN202123176359U CN217009488U CN 217009488 U CN217009488 U CN 217009488U CN 202123176359 U CN202123176359 U CN 202123176359U CN 217009488 U CN217009488 U CN 217009488U
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Abstract
The utility model discloses a soft package battery pack and an electronic device, wherein the soft package battery pack comprises: the method comprises the following steps: the battery cell comprises a first soft package battery, a second soft package battery and a protection plate, wherein the first soft package battery and the second soft package battery both comprise a battery cell, a pair of tabs are arranged on the battery cell along the length direction of the battery cell, and the battery cells of the first soft package battery and the second soft package battery are overlapped in the thickness direction; the protection plate is connected with the tabs of the first soft package battery and the second soft package battery; the protection plate is erected on the end face, close to the tab, of the battery cell. Compared with the existing mode that the protection plate is horizontally arranged on the head of the battery cell, the mode that the protection plate is vertically arranged faces the soft package battery of the ultrathin battery cell can meet the requirement of the lowest wiring (or the minimum size of a protection device) of the protection plate, the structure of the protection plate has smaller space requirement, the volume ratio of the battery cell is improved, the requirement of improving the capacity of the battery is met, and the design space is saved.
Description
Technical Field
The utility model relates to the technical field of battery packaging, in particular to a soft package battery pack and electronic equipment.
Background
With the gradual maturity of lithium ion battery technology and the promotion of new energy by the state, especially the urgent development and application of lithium battery technology, the requirements for the technical quality and cost of lithium battery products are continuously optimized, and the capacity and voltage of a single battery cell cannot meet the requirements. Therefore, the current solution is to connect a plurality of single battery cells in series or in parallel as a power source to achieve the required capacity and voltage. The flexible package lithium battery has small volume, light weight, thin thickness and convenient combination, and is widely popularized in battery design.
The current market mobile terminal devices are all designed in an ultrathin direction, and batteries of the mobile terminal devices have the requirement of being thinner and thinner, particularly batteries which are connected in parallel and in series. As shown in fig. 1a and 1b, the original PCM flatly placed cell head structure cannot meet the requirement of the PCM minimum wiring (or the minimum size of a protection device) because the battery is too thin, and when the PCM width is too narrow, the distance between the formed connecting devices is too small (arrow indicated part in fig. 1 b), so that the risk of short circuit of the cell tabs caused by the too small distance (arrow indicated part in fig. 1 b) cannot meet the design requirement of the ultra-thin battery.
SUMMERY OF THE UTILITY MODEL
The utility model provides a soft package battery pack and electronic equipment, and aims to solve the problem that the head structure of a horizontal cell of a PCM in a series-parallel structure of the existing soft package lithium battery cannot meet the requirement of the lowest wiring of the PCM (or the minimum size of a protection device) because the battery is too thin.
In a first aspect, the present invention provides a pouch battery pack comprising: the battery cell comprises a first soft package battery, a second soft package battery and a protection plate, wherein the first soft package battery and the second soft package battery both comprise a battery cell, a pair of tabs are arranged on the battery cell along the length direction of the battery cell, and the battery cells of the first soft package battery and the second soft package battery are overlapped in the thickness direction; the protection plate is connected with tabs of the first soft package battery and the second soft package battery; the protection plate is erected on the end face, close to the tab, of the battery cell.
Further, the protection shield has the first surface and the second surface of carrying on the back mutually, the first surface with the second all is equipped with electric connector on the surface, the protection shield is located first laminate polymer battery's utmost point ear with between second laminate polymer battery's the utmost point ear, the first surface orientation first laminate polymer battery's utmost point ear, first laminate polymer battery's utmost point ear with electric connector on the first surface is connected, the second surface orientation second laminate polymer battery's utmost point ear, second laminate polymer battery's utmost point ear with the second is electric connector on the surface connects.
Furthermore, the electric connector comprises a bending part, and a first connecting part and a second connecting part which are connected with the bending part, the first connecting part is fixedly arranged on the first surface or the second surface, the second connecting part is used for being connected with the tab, and the second connecting part can be bent relative to the first connecting part by the bending part.
Further, the second connecting part can be bent to be overlapped with the first connecting part; and/or the second connecting part can be bent relative to the first connecting part to be vertical to the first connecting part.
Further, first laminate polymer battery with second laminate polymer battery all includes and is used for the encapsulation the packaging film of battery cell, the packaging film includes the edge the length direction protrusion in of battery cell the top banding of terminal surface, wherein, the top banding with the terminal surface forms the top sealing region, the protection shield is at least partially located the top sealing region.
Further, the soft package battery pack further comprises an insulating piece, and the insulating piece covers the protection plate and the lug.
Further, the insulating part comprises an upper insulating shell and a lower insulating shell, the long edge of the protection plate extends along the width direction of the battery core, the short edge of the protection plate extends along the length direction of the battery core, the lower insulating shell is sleeved on the protection plate from bottom to top along the short edge direction of the protection plate, and the upper insulating shell is sleeved on the lower insulating shell from top to bottom along the short edge direction of the protection plate.
Furthermore, the upper insulating shell sleeve is provided with a narrowing section and a widening section which extend from top to bottom on the section of the long side direction of the protective plate, the lower insulating shell sleeve is embedded into the narrowing section, and the widening section is attached to the outer side of the top sealing edge.
Further, laminate polymer battery group still include with the output terminal that the protection shield is connected, go up the insulating shell with the insulating shell corresponds down the position on the short avris of protection shield has been seted up and has been run through the side, output terminal follows run through the side and draw forth.
In a second aspect, the present invention further provides an electronic device, which includes a pouch battery pack, where the pouch battery pack is the pouch battery pack according to the first aspect.
Compared with the prior art, the utility model has the beneficial effects that: coincide first laminate polymer battery and second laminate polymer battery's electric core on the thickness direction, and set up the terminal surface that is close to utmost point ear at electric core with the protection shield erectly, the protection shield forms the series/parallel structure with first laminate polymer battery and second laminate polymer battery's utmost point ear connection, keep flat the mode at electric core head structure for current protection shield, in the face of ultra-thin electric core's laminate polymer battery, the mode that sets up is erect to the protection shield, can satisfy the minimum wiring of protection shield (or protection device minimum dimension) requirement, its structure has less space requirement, the electric core volume ratio has been improved, in order to reach the demand that promotes battery capacity, design space is saved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
Fig. 1a and 1b show schematic diagrams of prior art pouch batteries;
fig. 2 shows an exploded view of a pouch battery according to an embodiment of the present invention;
FIG. 3 is an enlarged view of portion A of FIG. 2;
fig. 4 shows a schematic diagram of the placing position of the soft-package battery pack during welding and assembling according to the utility model;
FIG. 5 is an enlarged view of the portion B of FIG. 4;
fig. 6 shows a schematic view of the assembly of a pouch battery according to the present invention after welding;
fig. 7 shows another schematic view of the assembly of the pouch battery according to the present invention after welding;
FIG. 8 shows a schematic cross-sectional view of an upper insulating shell embodying the present invention;
fig. 9 shows a schematic view of the assembled pouch battery pack according to the embodiment of the present invention;
1A, a first soft package battery; 1B, a second soft package battery; 11. an electric core; 12. a tab; 13. packaging the film; 14. top edge sealing; 15. an end face; 16. a top seal area; 2. a protection plate; 21. a first surface; 22. a second surface; 23. an electrical connection; 231. a first connection portion; 232. a second connecting portion; 233. a bending part; 31. an upper insulating shell; 311. narrowing the section; 312. a widening section; 313. a penetration side; 32. a lower insulating shell; 4. and an output terminal.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items and includes such combinations.
Referring to fig. 1a and 1b, a conventional soft package battery includes an encapsulation film 13 and a battery cell 11 encapsulated in the encapsulation film 13, a pair of tabs 12 is disposed on a top of the battery cell 11, and a top sealing structure (i.e., a head structure) is formed on the top of the battery cell 11 after encapsulation. The two soft package batteries are stacked together, the protection plate 2 (hereinafter referred to as PCM) is flatly placed on the top sealing structure, and the tab 12 is connected with the protection plate 2. The PCM comprises a PCB and protection components arranged on the PCB, such as a protection chip, an MOS (metal oxide semiconductor) tube, a resistor, a capacitor and the like. The existing PCM flat-placing mode is difficult to adapt to the serial and parallel structure design of the ultra-thin soft-package battery, on one hand, as shown in fig. 1a, because a protection device has the limitation of minimum size, the PCM flat-placing mode cannot be applied when the PCM is placed on the head structure of the battery cell 11 and the size of the protection device is larger than the thickness of two ultra-thin battery cells 11 which are stacked together; on the other hand, as shown in fig. 1b, when facing an ultra-thin soft package battery, the PCM is designed to be very narrow, and then the space between two connecting devices on the PCM for connecting the tabs 12 is very small, which is likely to cause the risk of short circuit of the tabs 12 of the battery cell 11. In view of this, the soft-package battery pack provided in the embodiment of the present invention can remove the minimum limitation on the battery thickness dimension caused by the superposition and series connection of the original battery cells 11 in the thickness direction, and realize the producibility and the controllability of the PCM position thickness dimension of the battery with the superposition and series connection of the ultrathin battery cells 11 in the thickness direction; the short circuit risk of the pole ear 12 of the battery cell 11 caused by too small space between the connecting devices formed by too narrow PCM width is eliminated; the product safety is improved, the production reject ratio is reduced, and the product competitiveness is improved.
As shown in fig. 2, an embodiment of the present invention provides a pouch battery pack including: the flexible package battery comprises a first flexible package battery 1A, a second flexible package battery 1B and a protection plate 2, wherein the first flexible package battery 1A and the second flexible package battery 1B both comprise an electric core 11, the electric core 11 is provided with a pair of tabs 12 along the length direction (Z direction), and the electric core 11 of the first flexible package battery 1A and the second flexible package battery 1B are overlapped in the thickness direction (Y direction); the protective plate 2 is connected with the tabs 12 of the first soft package battery 1A and the second soft package battery 1B; the protective plate 2 is erected on the end face 15 of the battery cell 11 close to the tab 12.
Specifically, when the battery cell 11 of the first soft package battery 1A is stacked on the battery cell 11 of the second soft package battery 1B, the tab 12 of the first soft package battery 1A and the tab 12 of the second soft package battery 1B are located on the same side of the battery cell 11 in the length direction. The protective plate 2 is also located on this side, and the protective plate 2 is connected with the tab 12 of the first pouch cell 1A and the second pouch cell 1B to form a series or parallel circuit structure. As shown in fig. 3, since the battery cell 11 has a certain thickness, the battery cell 11 is formed with an end surface 15 in the longitudinal direction thereof, and the protection plate 2 is disposed upright with respect to the end surface 15 of the battery cell 11 near the tab 12. As shown in fig. 2, that is, the protection plate 2 is parallel to the battery cell 11, the thickness direction of the protection plate 2 is consistent with the thickness direction of the battery cell 11, and the plate body of the protection plate 2 extends in the length direction of the battery cell 11. Therefore, the protection components on the protection plate 2 are vertical relative to the end face 15 of the battery cell 11 close to the tab 12, the minimum limitation on the thickness of the battery due to the superposition and series connection in the thickness direction of the battery cell 11 is removed without considering the size limitation of the protection components, and the controllability of the PCM position thickness of the ultrathin battery cell 11 with the superposition and series connection in the thickness direction is realized.
Through implementing this embodiment, coincide first laminate polymer battery 1A and second laminate polymer battery 1B's electric core 11 in thickness direction, and set up protection shield 2 erectly at electric core 11 and be close to terminal surface 15 of utmost point ear 12, protection shield 2 is connected with first laminate polymer battery 1A and second laminate polymer battery 1B's utmost point ear 12 and forms cluster/parallel structure, keep flat the mode at electric core 11 head structure for current protection shield 2, face ultra-thin electric core 11's laminate polymer battery, protection shield 2 erects the mode that sets up, can satisfy protection shield 2 minimum wiring (or protection device minimum size) requirement, its structure has the space requirement that has the less, electric core 11 volume ratio has been improved, in order to reach the demand that promotes battery capacity, save design space.
In an embodiment, referring to fig. 4 and 5, protection plate 2 has first surface 21 and second surface 22 that carry on the back mutually, first surface 21 with all be equipped with electric connector 23 on the second surface 22, protection plate 2 is located first laminate polymer battery 1A's utmost point ear 12 with between second laminate polymer battery 1B's utmost point ear 12, first surface 21 orientation first laminate polymer battery 1A's utmost point ear 12, first laminate polymer battery 1A's utmost point ear 12 with electric connector 23 on the first surface 21 is connected, second surface 22 orientation second laminate polymer battery 1B's utmost point ear 12, second laminate polymer battery 1B's utmost point ear 12 with electric connector 23 on the second surface 22 is connected.
Specifically, referring to fig. 5, the first surface 21 and the second surface 22 of the protective plate 2 are both provided with two electrical connectors 23, the two electrical connectors 23 are arranged at intervals, the two electrical connectors 23 on the first surface 21 are respectively connected with the positive and negative electrode tabs 12 of the first pouch battery 1A, and the two electrical connectors 23 on the second surface 22 are respectively connected with the positive and negative electrode tabs 12 of the second pouch battery 1B. Through erectting protection shield 2 and setting up, set up electric connector 23 respectively on two surfaces of the back of the body of protection shield 2 mutually, just so can not contact with second laminate polymer battery 1B's utmost point ear 12 when first laminate polymer battery 1A's utmost point ear 12 is connected with the electric connector 23 of first surface 21, and on the same hand, also can not contact with first laminate polymer battery 1A's utmost point ear 12 when second laminate polymer battery 1B's utmost point ear 12 is connected with the electric connector 23 of second surface 22, therefore, 11 utmost point ear 12 short circuit risks because of electric core have been eliminated, the product safety is improved, and the production defective rate is effectively reduced.
There are a number of forms of electrical connector 23, and the present embodiment describes a preferred embodiment. Specifically, in practical application, the tab 12 needs to be welded to the electrical connector 23 on the protection plate 2, and the first soft package battery 1A and the second soft package battery 1B and the protection plate 2 need to be fixed by welding fixtures during welding. However, since the battery cell 11 of the first pouch battery 1A and the battery cell 11 of the second pouch battery 1B are stacked together, it is difficult to set the position of the welding jig during welding. Therefore, in order to facilitate welding of the tab 12 and the electrical connector 23, the present embodiment provides a corresponding modification to the electrical connector 23.
In a specific implementation, with reference to fig. 5, the electrical connector 23 includes a bending portion 233, and a first connecting portion 231 and a second connecting portion 232 connected to the bending portion 233, where the first connecting portion 231 is fixedly disposed on the first surface 21 or the second surface 22, and the second connecting portion 232 is used for being connected to the tab 12, and the second connecting portion 232 can be bent relative to the first connecting portion 231 by the bending portion 233. Specifically, the first connection portion 231 and the second connection portion 232 are sheet-shaped, and have a large contact area, thereby facilitating welding with the tab 12. The first connection portion 231 of the electrical connection member 23 is fixed to the first surface 21, and the second connection portion 232 is bent arbitrarily relative to the first connection portion 231 fixed to the first surface 21. The first connection portion 231 of the electrical connection member 23 is fixed on the second surface 22, and the second connection portion 232 can be bent arbitrarily relative to the first connection portion 231 fixed on the second surface 22.
From this, as shown in fig. 4, when welding, the welding jig of fixed first laminate polymer battery 1A and the welding jig of fixed second laminate polymer battery 1B can set up respectively in both sides, and the welding jig of fixed protection shield board 2 can be established in the centre, and fixed back, protection shield board 2 are in the state of erectting, and first laminate polymer battery 1A and second laminate polymer battery 1B are located the both sides of protection shield board 2 and are mutually perpendicular with protection shield board 2. At this time, the second connecting portion 232 of the electrical connecting member 23 on the first surface 21 can be bent relative to the first connecting portion 231 to be perpendicular to the first connecting portion 231, so that the tab 12 on the first pouch battery 1A can be directly welded under the first connecting portion 231. Similarly, the tab 12 of the second soft package battery 1B is also welded in the same manner, and will not be described in detail here.
After the tabs 12 of the first soft package battery 1A and the second soft package battery 1B are welded, the second connecting portion 232 of the electrical connecting piece 23 on the first surface 21 is bent to overlap the first connecting portion 231, and the second connecting portion 232 of the electrical connecting piece 23 on the second surface 22 is bent to overlap the first connecting portion 231 in the same way, so that the battery cell 11 of the first soft package battery 1A is overlapped with the battery cell 11 of the second soft package battery 1B. In summary, the first connection portion 231, the second connection portion 232 and the bent portion 233 of the electrical connector 23 of the present embodiment can jointly form an L-shaped sheet structure, wherein one sheet can be opened and closed relative to the other sheet to form an "L" shape or a "one" shape. In the present embodiment, the electrical connection member 23 is an L-shaped nickel plate. By implementing the embodiment, the feasibility of mass production and the producibility of the battery with the ultrathin cells 11 stacked in parallel and in series are met.
In an embodiment, as shown in fig. 2 and fig. 3, each of the first pouch battery 1A and the second pouch battery 1B includes an encapsulation film 13 for encapsulating the battery cell 11, and the encapsulation film 13 includes a top sealing edge 14 protruding from the end surface 15 along a length direction of the battery cell 11, where the top sealing edge 14 and the end surface 15 form a top sealing area 16, and the protective plate 2 is at least partially located in the top sealing area 16. The packaging film 13 of laminate polymer battery can bulge the 11 tops of electric core and bulge 11 side partly of electric core usually after the encapsulation is accomplished, and this part of bulge electric core 11 top is top banding 14 promptly, and this part of bulge electric core 11 side is the side banding. The top seal edge 14 and the side seal edge form a top seal structure (i.e., a head structure) with an end surface 15 of the battery cell 11 close to the tab 12. The top seal edge 14 occupies a certain length of the battery cell 11, and a space is wasted in the length direction of the battery cell 11. The space between the end face 15 of the battery cell 11 close to the tab 12 and the top seal edge 14 is a top seal area 16, and the top seal area 16 occupies a certain space. In order to avoid the waste of space, in the present embodiment, the protection plate 2 is at least partially disposed in the top sealing region 16, so as to fully utilize the top sealing region 16, reduce the waste of space in the length direction of the battery cell 11, and save the design space.
Specifically, the protection plate 2 of the present embodiment has an elongated plate shape, and the long side of the protection plate 2 extends in the width direction (X direction) of the battery cell 11, and the short side of the protection plate 2 extends in the length direction (Z direction) of the battery cell 11. Then a part of the lower side edge of the long side of the protective plate 2 is placed upright on the capping region. This reduces the space waste of the battery cell 11 in the longitudinal direction.
In the present embodiment, the electric connector 23 is provided at a position where the first surface 21 and the second surface 22 are close to the upper side edge of the long side of the protective plate 2 as shown in fig. 2. Therefore, the problem that the tab 12 needs to be folded during assembly can be avoided, and the risk of fracture of the tab 12 is eliminated. Because the tab 12 of the soft package battery is usually connected with the top sealed edge 14, if the electric connector 23 is arranged at the position of the long edge of the protection plate 2 close to the lower side edge, and the lower side edge part of the protection plate 2 is located in the top sealed area, the tab 12 needs to be folded inwards to be connected with the electric connector 23 at the lower side edge of the long edge of the protection plate 2 in the top sealed area. In the embodiment, the electric connecting piece 23 is arranged at the position of the side edge of the long side of the protection plate 2, so that the situation that the tab 12 is folded can be avoided.
In one embodiment, the pouch battery pack further includes an insulating member, which covers the protection plate 2 and the tab 12. Through setting up the insulating part with protection shield 2 and utmost point ear 12 parcel for each components and parts and electric core 11 parts of exposing outside of insulating avoid with other circuit components and parts contacts, eliminate the short circuit risk. The type of the insulating member may be various, such as an insulating gummed paper, an insulating coating, an insulating sheath, etc., and the embodiment is not limited herein. The following embodiment describes a preferred type of insulator.
In this embodiment, referring to fig. 2, the insulating member includes an upper insulating shell 31 and a lower insulating shell 32, the long side of the protection board 2 extends along the width direction of the battery cell 11, the short side of the protection board 2 extends along the length direction of the battery cell 11, the lower insulating shell 32 is sleeved on the protection board 2 from bottom to top along the short side direction of the protection board 2, and the upper insulating shell 31 is sleeved on the lower insulating shell 32 from top to bottom along the short side direction of the protection board 2.
Specifically, the insulating member of the present embodiment is composed of an upper insulating shell 31 and a lower insulating shell 32, and in order to adapt to the shape of the protection board 2, the upper insulating shell 31 and the lower insulating shell 32 of the present embodiment are also in a shape of a long strip, and one side of the long strip is open and the other side is closed, and the open side is used for being sleeved. After the welding is completed, the lower insulating shell 32 is sleeved on the protection board 2 from bottom to top to wrap the protection board 2 and fixedly set the first connecting portion 231 on the surface of the protection board 2, so that the protection board 2 is insulated from the top sealing structure of the battery cell 11. Then, after the second connecting portion 232 is folded and the two electric cores 11 are stacked, the upper insulating shell 31 is sleeved on the lower insulating shell 32 from top to bottom to wrap the upper end of the protection plate 2 and the tab 12 welded to the second connecting portion 232, so that the whole protection plate 2 is insulated. From this, establish the mode of protection shield 2 through two upper and lower insulating shell cover, can wrap up whole protection shield 2 completely, insulating nature is good, and simple structure, convenient assembling.
Further, referring to fig. 2 and 8, the upper insulating shell 31 has a narrowing section 311 and a widening section 312 extending from top to bottom on the section of the protective plate 2 in the long side direction, the lower insulating shell 32 is embedded in the narrowing section 311, and the widening section 312 is attached to the outer side of the top sealing edge 14. Specifically, referring to fig. 8, in the long-side direction cross section of the protection plate 2, the upper insulating sheath 31 is divided into a narrowed section 311 and a widened section 312 from top to bottom due to different inner diameters, the inner diameter of the narrowed section is smaller, and the inner diameter of the widened section is larger, so that the narrowed section refers to a portion narrowed relative to the widened section, and the widened section refers to a portion widened relative to the narrowed section. The inner diameter of the lower insulating shell 32 is matched with the thickness of the protection plate 2, and the inner diameter of the narrowing section 311 is matched with the outer diameter of the lower insulating shell 32, so that the lower insulating shell 32 is embedded into the narrowing section 311, and the narrowing section 311 is tightly attached to the lower insulating shell 32, and the assembly is firmer and more stable. Wherein, the inner diameter of the widened section 312 is larger than that of the narrowed section 311, and the widened section 312 extends to the position of the top edge seal 14 and is attached to the outer side of the top edge seal 14. Because utmost point ear 12 is connected at top banding 14, expands the outside that wide section 312 laminating to top banding 14, can prevent that top banding 14 from turning up to it is spacing to utmost point ear 12, avoid utmost point ear 12 to drag the fracture, and live the top sealing structure parcel of whole electricity core 11, can improve structural strength, improve the security of product, reduce the defective rate.
In addition, referring to fig. 2, 8 and 9, the pouch battery pack of the present embodiment further includes an output terminal 4 connected to the protection plate 2, a penetrating side 313 is opened at a position of the upper insulating sheath 31 and the lower insulating sheath 32 corresponding to a short side of the protection plate 2, and the output terminal 4 is drawn out from the penetrating side 313. Specifically, the output terminal 4 is, for example, a wire, but may also be a wire, a plug, an FPC, or the like, and is not limited herein. The upper insulating shell 31 and the lower insulating shell 32 in this embodiment are U-shaped as a whole, the inner side of the U-shape wraps the protection plate 2, both sides of the U-shape are through sides 313, and the wires are led out from the through sides 313 to be connected with external equipment. The output terminal 4 is simply structured in a manner of being drawn out from the penetration side 313, and is convenient to wire.
The welding assembly process of the pouch battery pack of the present embodiment will be described below.
Firstly, the PCM and the battery cell 11 are respectively placed in a welding fixture (the placing mode is referred to as fig. 4), welding L-shaped nickel sheets on the PCM and a tab 12 of the battery cell 11 by using welding equipment (not limited to laser welding), wrapping an insulating PCM and a top sealing area 16 of the battery cell 11 by using a lower insulating shell 32, then bending the upper nickel sheets of the PCM, superposing and combining the battery cell 11 (referred to as fig. 6 and 7), and finally insulating the PCM (the battery head) by using an upper insulating shell 31 (referred to as fig. 9). The soft-packaged battery pack of this embodiment can satisfy mass production, and the assembly is simple convenient, convenient operation.
The embodiment of the utility model also provides electronic equipment, which is not limited herein, such as a smart phone, a tablet computer, a notebook computer, and the like. Electronic equipment includes equipment body and laminate polymer battery group, and the laminate polymer battery group supplies power for the equipment body. The pouch battery pack is the pouch battery pack described in the above embodiments, and is not limited thereto.
By implementing the embodiment, the minimum limitation of the battery thickness dimension caused by the superposition and series connection of the primary cells 11 in the thickness direction is removed, the requirement of electronic equipment on the thinner and thinner battery thickness is effectively met, and the producibility and the controllability of the PCM position thickness dimension of the ultrathin cell 11 thickness superposition and series connection battery are realized; the short circuit risk of the lugs 12 of the battery cell 11 caused by too small space between connecting devices formed by too narrow PCM width is eliminated; the product safety is improved, the production reject ratio is reduced, and the product competitiveness is improved.
The above description is intended to be illustrative of the preferred embodiment of the present invention and should not be taken as limiting the utility model, but rather, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the utility model.
Claims (10)
1. A pouch battery pack, comprising:
the first soft package battery and the second soft package battery respectively comprise an electric core, a pair of tabs are arranged on the electric core along the length direction of the electric core, and the electric cores of the first soft package battery and the second soft package battery are overlapped in the thickness direction;
the protection plate is connected with the tabs of the first soft package battery and the second soft package battery;
the protection plate is erected on the end face, close to the tab, of the battery cell.
2. The laminate polymer battery pack according to claim 1, characterized in that the protection plate has a first surface and a second surface which are opposite to each other, the first surface and the second surface are both provided with an electric connector, the protection plate is located between the tab of the first laminate polymer battery and the tab of the second laminate polymer battery, the first surface faces the tab of the first laminate polymer battery, the tab of the first laminate polymer battery is connected with the electric connector on the first surface, the second surface faces the tab of the second laminate polymer battery, and the tab of the second laminate polymer battery is connected with the electric connector on the second surface.
3. The soft package battery pack according to claim 2, wherein the electrical connector comprises a bent portion and a first connecting portion and a second connecting portion connected to the bent portion, the first connecting portion is fixedly disposed on the first surface or the second surface, the second connecting portion is used for being connected to a tab, and the second connecting portion can be bent relative to the first connecting portion by the bent portion.
4. The pouch battery pack according to claim 3, wherein the second connecting portion is bendable to overlap the first connecting portion; and/or the second connecting part can be bent relative to the first connecting part to be vertical to the first connecting part.
5. The laminate polymer battery pack according to any one of claims 1 to 4, wherein the first laminate polymer battery and the second laminate polymer battery each comprise an encapsulation film for encapsulating the battery cell, the encapsulation film comprises a top sealing edge protruding from the end face along the length direction of the battery cell, wherein the top sealing edge and the end face form a top sealing area, and the protection board is at least partially located in the top sealing area.
6. The pouch battery as defined in claim 5, further comprising an insulating member covering the protection plate and the tab.
7. The laminate battery pack according to claim 6, wherein the insulator includes an upper insulating sheath and a lower insulating sheath, the long side of the protection board extends in the width direction of the battery cell, the short side of the protection board extends in the length direction of the battery cell, the lower insulating sheath is sleeved on the protection board from bottom to top in the short side direction of the protection board, and the upper insulating sheath is sleeved on the lower insulating sheath from top to bottom in the short side direction of the protection board.
8. The pouch battery pack according to claim 7, wherein the upper insulating casing has a narrowed section and a widened section extending from top to bottom in a long-side direction cross section of the protection plate, the lower insulating casing is embedded in the narrowed section, and the widened section is attached to an outer side of the top sealing edge.
9. The pouch battery pack according to claim 8, further comprising an output terminal connected to the protection board, wherein the upper and lower insulating cases have a penetrating side at a position corresponding to a short side of the protection board, and the output terminal is led out from the penetrating side.
10. An electronic device characterized by comprising a pouch battery pack according to any of the above claims 1-9.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN202123176359.9U CN217009488U (en) | 2021-12-15 | 2021-12-15 | Laminate polymer battery group and electronic equipment |
Applications Claiming Priority (1)
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CN115498368A (en) * | 2022-09-20 | 2022-12-20 | 天津市捷威动力工业有限公司 | Battery cell connecting structure and connecting method thereof, battery cell unit and battery module |
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CN115498368A (en) * | 2022-09-20 | 2022-12-20 | 天津市捷威动力工业有限公司 | Battery cell connecting structure and connecting method thereof, battery cell unit and battery module |
CN115498368B (en) * | 2022-09-20 | 2023-07-07 | 天津市捷威动力工业有限公司 | Battery cell connection structure, connection method thereof, battery cell unit and battery module |
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