CN217035911U

CN217035911U - Laminate polymer battery group and battery module

Info

Publication number: CN217035911U
Application number: CN202121315692.0U
Authority: CN
Inventors: 伊恩多
Original assignee: Evergrande New Energy Technology Shenzhen Co Ltd
Current assignee: Evergrande New Energy Technology Shenzhen Co Ltd
Priority date: 2021-06-11
Filing date: 2021-06-11
Publication date: 2022-07-22
Anticipated expiration: 2031-06-11

Abstract

The utility model relates to the technical field of batteries, and provides a soft package battery pack and a battery module. Each naked electric core is equipped with a plurality of utmost point ears, and each utmost point ear homonymy sets up, sets up a plurality of mounting holes that set up side by side on the busbar. The utmost point ear is worn to locate the mounting hole that corresponds and is bent and support and lean on in the busbar to, connecting piece detachably connects in the utmost point ear of the naked electric core of busbar with fixed correspondence. Like this, through replacing welded connection and having reduced laminate polymer battery's manufacturing process, simultaneously, in case wherein arbitrary one or several naked electric cores go wrong and need change, only need dismantle the connecting piece that corresponds and can realize the separation of the naked electric core that corresponds to reduce laminate polymer battery group's cost of maintenance effectively.

Description

Laminate polymer battery group and battery module

Technical Field

The utility model relates to the technical field of batteries, and particularly provides a soft-package battery pack and a battery module with the same.

Background

The manufacturing process of the pouch battery involves many processes, and among them, welding is mostly adopted for fixing and connecting in the forming process. This leads to dimensional variations in production and design, as the welding process is usually accompanied by heat generation.

Simultaneously, in the use, if damage appears in solitary laminate polymer battery, to a great extent influences the performance of whole battery module, and adopts welded connection also to lead to damaged laminate polymer battery to be difficult for separating, like this, causes the whole scrap of battery module.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a soft package battery pack, and aims to solve the problems that an existing soft package battery is complex in manufacturing process and not easy to disassemble due to welding connection.

In order to realize the purpose, the utility model adopts the technical scheme that:

the utility model provides a first aspect, this application provides a soft-packaged battery group, including the naked electric core of a plurality of range upon range of settings, be equipped with a plurality of utmost point ears on each naked electric core, each utmost point ear homonymy sets up, soft-packaged battery group still includes busbar and a plurality of connecting piece, sets up a plurality of mounting holes that set up side by side on the busbar, and the utmost point ear of naked electric core is worn to locate the mounting hole that corresponds and is bent and support and lean on the busbar to, connecting piece detachably connects in the utmost point ear of the naked electric core of busbar with fixed correspondence.

The utility model has the beneficial effects that: according to the soft package battery pack provided by the utility model, each naked battery cell is stacked along the thickness direction, the lugs extending out from the same side penetrate through the corresponding mounting holes in the busbar, the lugs penetrating through the mounting holes are bent, and finally the lugs are fixed on the busbar through the connecting pieces.

In one implementation, the connecting piece is a screw, the busbar is provided with a screw hole, and the screw penetrates through the lug and is matched with the screw hole.

Through adopting above-mentioned technical scheme, utilize screw and screw to cooperate and realize the removable connection to utmost point ear and busbar.

In one implementation, the pouch battery pack further includes a gasket disposed between the screw and the tab.

Through adopting above-mentioned technical scheme, the gasket increases area of contact between screw and the utmost point ear.

In one embodiment, the connector comprises a first clamping plate and a second clamping plate movably connected to the first clamping plate, and the first clamping plate and the second clamping plate are clamped on the bus bar and the pole lug.

Through adopting above-mentioned technical scheme, utilize first joint board and second joint board to be clamping structure and carry out the centre gripping fixedly to busbar structure and utmost point ear.

In one implementation, laminate polymer battery group still includes gathers the piece, gathers the piece including gathering the main part and the collection terminal of electricity connection in gathering the main part, gathers terminal detachably and connects in the busbar.

Through adopting above-mentioned technical scheme, gather terminal and busbar also be detachably connected mode, the two separation of being convenient for.

In one implementation, the collection terminals are plugged into the buss bars; or the acquisition terminal is clamped on the bus bar.

Through adopting above-mentioned technical scheme, gather the terminal and can separate with the busbar fast, be convenient for maintain.

In a second aspect, the present application further provides a battery module, which includes a housing and further includes the above-mentioned pouch battery pack, and the pouch battery pack is disposed in the housing.

The utility model has the beneficial effects that: on the basis of the soft package battery pack, the battery module provided by the utility model has the advantages that the whole process is simpler, the yield is higher, and the later-stage maintenance is convenient.

In one embodiment, the housing includes a main housing, two end plates, and a base plate, at least one of the end plates being removably attached to the main housing, and/or the base plate being removably attached to the main housing.

By adopting the technical scheme, at least one position between the main shell and the end plate and/or between the main shell and the bottom plate is convenient for subsequent disassembly, and is convenient for later maintenance or recovery.

In one embodiment, the main housing has a U-shaped cross section along the width direction, an end portion of the main housing is recessed inward to form a first receiving groove, and an end plate is disposed in the first receiving groove and connected to the main housing by a screw.

Through adopting above-mentioned technical scheme, utilize first storage tank to carry out preliminary fixed to the end plate, then, connect through the screw.

In one embodiment, the main housing has a U-shaped cross section along the width direction, the bottom of the main housing is recessed inward to form a second receiving groove, and the bottom plate is disposed in the second receiving groove and connected to the main housing by screws.

Through adopting above-mentioned technical scheme, utilize the second storage tank to carry out preliminary fixed to the bottom plate, then, the rethread screw is connected.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a pouch battery pack according to an embodiment of the present invention;

fig. 2 is a partial sectional view of a pouch battery pack according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a battery module according to an embodiment of the present invention.

Wherein, in the figures, the various reference numbers:

100. soft-pack battery packs; 11. naked electric core; 12. a tab; 20. a bus bar; 30. a connecting member; 20a, mounting holes; 31. a first clamping connection plate; 32. a second clamping plate; 40. collecting parts; 41. collecting a main body; 42. a collection terminal; 200. a housing; 201. a main housing; 202. an end plate; 203. a base plate; 204. a first accommodating groove; 205. a second receiving groove.

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 accompanying drawings are illustrative and intended to explain the present invention and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being permanently connected, detachably connected, or integral; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Before the box of battery module is packed into to laminate assembly back to the laminate polymer battery group, the utmost point ear of each naked electric core all is connected on the busbar through laser welding to realize the concentrated output of electric energy ground, here, laser welding's advantage is that the reliability is high, and it is more firm to be connected between utmost point ear and the busbar. However, once one or more of the bare cells have a circuit or a breakage problem and need to be disassembled, the subsequent maintenance work is liable to cause irreversible damage to the pole ears, and therefore, in view of the above problems, the present application provides a soft pack battery pack, which is specifically implemented as follows:

referring to fig. 1, a pouch battery pack 100 according to the present invention includes a plurality of bare cells 11 stacked one on another, a bus bar 20, and a plurality of connecting members 30. And, be equipped with a plurality of utmost point ears 12 on each naked electric core 11, each utmost point ear homonymy sets up, sets up a plurality of mounting holes 20a that set up side by side on the busbar 20, and mounting holes 20a supplies the homonymy utmost point ear 12 of each naked electric core 11 to wear to establish and stretch out to the outside, conveniently fixes utmost point ear 12, and simultaneously, the quantity of the utmost point ear 12 of stretching out by mounting holes 20a does not do the injecing, for example, mountable hole 20a department stretches out two or more than two utmost point ear 12. The utmost point ear 12 of naked electric core 11 wears to locate corresponding mounting hole 20a and bends and leans on busbar 20 to, connecting piece 30 detachably connects in busbar 20 with the utmost point ear 12 of fixed naked electric core 11 that corresponds. Here, the connecting member 30 is detachably connected to the bus bar 20, for example, by a screw connection, a plug connection, a snap connection, etc., so as to ensure non-welding contact between the tab 12 and the bus bar 20, to facilitate separation, and to ensure the integrity of the shape of the tab 12.

According to the soft package battery pack 100 provided by the utility model, each bare cell 11 is stacked in the thickness direction, the tab 12 extending from the same side penetrates through the corresponding mounting hole 20a on the busbar 20, meanwhile, the tab 12 penetrating through the mounting hole 20a is bent, and finally, the tab 12 is fixed on the busbar 20 through the connecting piece 30, and as the connecting piece 30 and the busbar 20 and the tab 12 and the busbar 20 are connected in a non-welding manner, the manufacturing process of the soft package battery is reduced, and meanwhile, once any one or more bare cells 11 have problems and need to be replaced, the corresponding bare cell 11 can be separated only by detaching the corresponding connecting piece 30, so that the maintenance cost of the soft package battery pack 100 is effectively reduced.

Referring to fig. 1, in one embodiment, the connecting member 30 is a screw, the bus bar 20 is provided with a screw hole, and the screw is inserted into the tab 12 of the bare cell 11 and then is engaged with the screw hole. In this case, it can be understood that, the tab 12 of the bare cell 11 also needs to be provided with a corresponding through hole corresponding to the screw hole, so that the tab 12 is pressed and fixed on the busbar 20 by screwing a screw into the screw hole to electrically communicate the two. When naked electric core 11 is replaced to needs, only need with the screw reverse revolve twist can.

By adopting the technical scheme, the detachable connection of the pole lug 12 and the bus bar 20 is realized by matching the screw with the screw hole.

In one implementation, the pouch battery pack 100 further includes a gasket, and the gasket is disposed between the screw and the tab 12 of the bare cell 11. Through adopting above-mentioned technical scheme, the gasket increases the area of contact between screw and utmost point ear 12. As can be understood, the cross-sectional area of the nut of the screw in the radial direction is small, and when the acting force of the abutment between the tab 12 and the bus bar 20 needs to be increased, the nut of the screw will extrude the tab 12 to damage the surface of the tab 12, so that the gasket can increase the contact area between the screw and the tab 12 to prevent the screw from damaging the tab 12 during the screwing process.

Referring to fig. 2, in one embodiment, the connecting member 30 includes a first clamping plate 31 and a second clamping plate 32 movably connected to the first clamping plate 31, and the first clamping plate 31 and the second clamping plate 32 are clamped between the bus bar 20 and the tab 12 of the bare cell 11. Through adopting above-mentioned technical scheme, utilize first joint board 31 and second joint board 32 to be clamping structure and carry out the centre gripping fixedly to busbar structure and utmost point ear 12. For example, the first clamping plate 31 is connected to the second clamping plate 32 by a screw, and the distance between the first clamping plate 31 and the second clamping plate 32 is changed by rotating the screw; when disassembly is required, the first engaging plate 31 and the second engaging plate 32 are both separated from the screw.

Referring to fig. 1, in one embodiment, the pouch battery pack 100 further includes a collecting member 40, the collecting member 40 includes a collecting body 41 and a collecting terminal 42 electrically connected to the collecting body 41, and the collecting terminal 42 is detachably connected to the bus bar 20. It is understood that the collecting member 40 is used for collecting electrical data of the bus bar 20, for example, the collecting member 40 is a flexible circuit board, and the bus bar 20 includes a plurality of bus bar bodies arranged side by side, and each collecting terminal 42 of the flexible circuit board is correspondingly connected to a bus bar body, so that each collecting terminal 42 collects electrical data information of a corresponding bus bar body.

By adopting the technical scheme, the acquisition terminal 42 and the bus bar 20 are also detachably connected, so that the acquisition terminal and the bus bar are conveniently separated.

In one implementation, collection terminals 42 plug into buss bars 20; alternatively, the collecting terminal 42 is snap-fitted to the bus bar 20. Specifically, the collection terminal 42 is connected with the bus plate body through the connection form of plugging, i.e., a plugging hole is formed in the bus plate body, and the collection terminal 42 is connected with the plugging hole in a plugging manner through a pressing manner. Or, be connected with the collecting terminal plate body through the connected mode of joint at collecting terminal 42, be equipped with the joint groove on the collecting terminal plate body promptly, and be equipped with the buckle on collecting terminal 42, realize the connection of the two through buckle and joint groove joint looks joint.

By adopting the technical scheme, the acquisition terminal 42 can be quickly separated from the bus bar 20, and the maintenance is convenient.

In a second aspect, please refer to fig. 3, the present application further provides a battery module, which includes a housing 200, and further includes the pouch battery pack 100, where the pouch battery pack 100 is disposed in the housing 200.

On the basis of the soft package battery pack 100, the battery module provided by the utility model has the advantages of simpler overall process, higher yield and convenience for later maintenance.

Referring to fig. 3, in one embodiment, the housing 200 includes a main housing 201, two end plates 202 and a bottom plate 203, at least one end plate 202 is detachably connected to the main housing 201, and/or the bottom plate 203 is detachably connected to the main housing 201. It can be understood that, when maintenance is performed, the housing 200 also needs to be disassembled, and the conventional battery module case is mostly connected by laser welding to ensure good sealing performance, which also results in a problem that the case is not easily disassembled. In the structure of the housing 200 of the present application, at least one end plate 202 (a blocking plate disposed on two opposite sides of the main housing 201) and/or the bottom plate 203 are detachably connected to the main housing 201, and in particular, a screw connection may be adopted. For example, in the present embodiment, two end plates 202 and one bottom plate 203 can be detachably connected to the main housing 201, so that the options for maintenance can be increased, and the change of the size specification of the housing 200 by laser welding can be reduced, thereby maximally ensuring the size consistency of the housing 200.

By adopting the above technical scheme, at least one place exists between the main casing 201 and the end plate 202, and/or between the main casing 201 and the bottom plate 203, which is convenient for subsequent disassembly and later maintenance or recovery.

Specifically, referring to fig. 3, in an embodiment, a cross section of the main casing 201 along a width direction is U-shaped, an end of the main casing 201 is recessed inward to form a first receiving groove 204, and an end plate 202 is disposed in the first receiving groove 204 and connected to the main casing 201 through screws. Through adopting above-mentioned technical scheme, utilize first storage tank 204 to carry out preliminary fixed to end plate 202, then, connect through the screw. As can be appreciated, the first receiving groove 204 can well limit the end plate 202, and achieve temporary fixation, which facilitates subsequent screw installation.

Specifically, referring to fig. 3, in an embodiment, a cross section of the main housing 201 along a width direction is U-shaped, a bottom of the main housing 201 is recessed inward to form a second receiving groove 205, and the bottom plate 203 is disposed in the second receiving groove 205 and connected to the main housing 201 through screws. Through adopting above-mentioned technical scheme, utilize second storage tank 205 to carry out preliminary fixed to bottom plate 203, then, the rethread screw is connected. It can be understood that the second receiving groove 205 can well limit the end bottom plate 203, and temporary fixation is realized, thereby facilitating subsequent screw installation.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a soft-package battery group, includes a plurality of naked electric cores that range upon range of setting, each be equipped with a plurality of utmost point ears on the naked electric core, each utmost point ear homonymy sets up its characterized in that: laminate polymer battery group still includes busbar and a plurality of connecting piece, set up a plurality of mounting holes that set up side by side on the busbar, the utmost point ear of naked electric core wears to locate to correspond the mounting hole just bends to support and lean on in on the busbar, and connecting piece detachably connect in the busbar corresponds with fixed the utmost point ear of naked electric core.

2. Pouch battery according to claim 1, characterized in that: the connecting piece is a screw, a screw hole is formed in the busbar, and the screw penetrates through the lug and is matched with the screw hole in an inner fit mode.

3. Pouch battery according to claim 2, characterized in that: the soft-package battery pack further comprises a gasket, and the gasket is arranged between the screw and the pole lugs.

4. The pouch battery according to claim 1, characterized in that: the connecting piece includes first joint board and swing joint in the second joint board of first joint board, first joint board with the centre gripping of second joint board in the busbar with utmost point ear.

5. Pouch battery according to claim 1, characterized in that: laminate polymer battery group is still including gathering the piece, gather the piece including gathering the main part and electricity connect in gather the collection terminal of main part, gather terminal detachably connect in the busbar.

6. Pouch battery according to claim 5, characterized in that: the collecting terminal is inserted in the bus bar; or the collecting terminal is clamped with the bus bar.

7. The utility model provides a battery module, includes shell, its characterized in that: further comprising a pouch battery as defined in any of claims 1 to 6, said pouch battery being disposed within said housing.

8. The battery module according to claim 7, wherein: the shell comprises a main shell body, two end plates and a bottom plate, wherein at least one end plate is detachably connected with the main shell body, and/or the bottom plate is detachably connected with the main shell body.

9. The battery module according to claim 8, wherein: the main casing body is U type along width direction's cross-section, the tip of the main casing body inwards caves in and forms first storage tank, the end plate is arranged in the first storage tank to, through the screw connection in the main casing body.

10. The battery module according to claim 8, wherein: the main casing body is U-shaped along width direction's cross-section, the bottom of the main casing body is inwards sunken to form the second storage tank, the bottom plate is arranged in the second storage tank to, through screwed connection in the main casing body.