CN217507599U - Secondary battery and electronic device - Google Patents

Abstract

The utility model discloses a secondary battery and electronic equipment. The utility model discloses in, secondary battery includes: a housing; a top cover; the connecting piece is provided with a first side edge, a second side edge arranged opposite to the first side edge and a first mounting surface for connecting the first side edge and the second side edge, and the extending direction of the first side edge and the second side edge is the length direction of the connecting piece; each battery cell is provided with a battery cell body and a lug protruding from one end of the battery cell body, and one end of the lug departing from the battery cell body is a free end; the lugs with the same polarity in the plurality of battery cells are connected to the first mounting surface in a staggered manner along the length direction of the connecting sheet; the free ends of the two tabs with the same polarity in at least one pair of battery cells face the first side edge and the second side edge respectively. Compared with the prior art, the battery is longer and narrower, and the use requirements of the existing products can be met.

Description

Secondary battery and electronic device

Technical Field

The utility model relates to a battery technology field, in particular to secondary battery and electronic equipment.

Background

In recent years, the appearance of new energy automobiles has a great promoting effect on social development and environmental protection, and a power battery pack is a rechargeable battery, is a power source of the new energy automobiles, and is widely applied to the field of the new energy automobiles. A plurality of battery cores are arranged in the existing battery, the positive lugs of the battery cores are oppositely welded on the positive switching sheet, the positive switching sheet is welded on the positive post, and the positive post is fixed on the cover plate body. However, the area of the battery cover plate is large and wide, and the positive pole adapter plate is also large and wide in adaptation with the area of the cover plate, so that the existing battery is wide and the use requirement of the existing product cannot be met.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a secondary battery and electronic equipment for the battery is more long and narrow, can satisfy current product user demand.

In order to solve the above technical problem, an embodiment of the present invention provides a secondary battery, including:

a housing having an opening;

the top cover is provided with a pole mounting hole; the top cover covers the opening and is connected with the shell;

the pole column penetrates through the top cover through the pole column mounting hole, and a bottom plate of the pole column is positioned on the back surface of the top cover;

the connecting sheet is electrically connected with the pole and is provided with a first side edge, a second side edge opposite to the first side edge and a first mounting surface for connecting the first side edge and the second side edge, and the extending direction of the first side edge and the second side edge is the length direction of the connecting sheet; and the number of the first and second groups,

the battery comprises a plurality of battery cells, a plurality of battery cells and a plurality of battery cells, wherein each battery cell is provided with a battery cell body and a lug protruding from one end of the battery cell body, and one end of the lug departing from the battery cell body is a free end; the electrode lugs with the same polarity in the battery cells are connected to the first mounting surface in a staggered manner along the length direction of the connecting sheets, and the polarity of the electrode posts connected to the connecting sheets is the same as that of the electrode lugs welded on the connecting sheets; the free ends of the two tabs with the same polarity in the battery cell face the first side edge and the second side edge respectively.

In one embodiment, the tab is provided with a welding area welded with the first mounting surface of the connecting piece;

wherein the weld region of the tab with the free end facing the first side edge is spaced from the weld region of the tab with the free end facing the second side edge. Thereby facilitating welding of the tab to the first mounting surface.

In one embodiment, the width of the connecting piece ranges from 12mm to 30 mm.

In one embodiment, a weld protection sheet is attached to the upper surface of the tab, and the weld zone is located in the area of the weld protection sheet.

In an embodiment, on the same battery cell, the tab with the free end facing the first side edge has a plurality of tabs or the tab with the free end facing the second side edge has a plurality of tabs. Thereby increasing the flow area of the secondary battery.

In an embodiment, the battery cells are a pair, and the battery cells are arranged oppositely along the width direction of the connecting sheet.

Each electric core is horizontally laid and arranged, and one end of each electric core, which extends out of the lug, is arranged oppositely.

In one embodiment, the poles are provided with a pair of spaced-apart positive poles and negative poles;

the connecting pieces are a pair of connecting pieces which are arranged at intervals and respectively comprise a positive connecting piece connected with the positive pole column and a negative connecting piece connected with the negative pole column; and the positive lug of each battery cell is welded with the positive connecting piece, and the negative lug of each battery cell is welded with the negative connecting piece.

In one embodiment, the positive tab has a facing region for welding the positive post; the negative connecting sheet is provided with a negative butt joint area for welding the negative pole;

and the positive electrode lug and the negative electrode lug are both positioned between the positive butt joint area and the negative butt joint area.

The utility model discloses an embodiment provides an electronic equipment again, include: the secondary battery as described above.

The utility model discloses embodiment is for prior art, because the utmost point ear of homopolarity staggers along the length direction of connection piece in a plurality of electric cores and connects on the first installation face to the first side of connection piece reduces to the space that needs to connect utmost point ear on the width direction of connection piece promptly to the direction of second side, lets the width of connection piece corresponding narrowing, and the connection piece is more long and narrow, and the space of the top cap that the connection piece needs also can be more long and narrow still less, makes this battery more long and narrow for current battery, satisfies the user demand of the long and narrow battery of current product.

Drawings

Fig. 1 is a schematic structural view of a secondary battery according to an embodiment of the present invention;

fig. 2 is a schematic structural view illustrating a cell welded to a connecting sheet according to an embodiment of the present invention;

fig. 3 is a schematic structural view illustrating a cell welded to a connection plate and a connection plate welded to a top cap according to an embodiment of the present invention;

fig. 4 is a schematic structural view illustrating a cell welded to a connecting sheet according to another embodiment of the present invention;

100, an electric core assembly; 1. a top cover; 21. a positive post; 210. a positive electrode connecting sheet; 211. directly facing the connection area; 212. a first side edge; 213. a second side edge; 22. a negative pole post; 220. a negative electrode connecting sheet; 221. a negative docking area; 3. an electric core; 31. a cell body; 4. a positive tab; 5. a negative tab; 6. an electric core; 61. a cell body; 7. a positive tab; 8. a negative tab; 9. a housing; 41. a welding area.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the following describes each embodiment of the present invention in detail with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that in various embodiments of the invention, numerous technical details are set forth in order to provide a better understanding of the present application. However, the technical solutions claimed in the claims of the present application can be implemented without these technical details and with various changes and modifications based on the following embodiments.

Throughout the specification and claims, the word "comprise" and variations thereof, such as "comprises" and "comprising," are to be understood as an open, inclusive meaning, i.e., as being interpreted to mean "including, but not limited to," unless the context requires otherwise.

Various embodiments of the present invention will be described in detail below with reference to the accompanying drawings in order to more clearly understand the objects, features and advantages of the present invention. It should be understood that the embodiments shown in the drawings are not intended as limitations on the scope of the invention, but are merely illustrative of the true spirit of the technical solution of the invention.

Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

As used in this specification and the appended claims, the singular forms "a", "an", and "the" include plural referents unless the context clearly dictates otherwise. It should be noted that the term "or" is generally employed in its sense including "and/or" unless the context clearly dictates otherwise.

In the following description, for the sake of clarity, the structure and operation of the present invention will be described with the aid of directional terms, but the terms "front", "rear", "left", "right", "outer", "inner", "outer", "inward", "upper", "lower", etc. should be understood as words of convenience and not as words of limitation.

Embodiments of the present invention are described below with reference to the drawings.

A first embodiment of the present invention relates to a secondary battery. As shown in fig. 1, 2, and 3, the secondary battery includes a case 9, a top cover 1, a positive post 21, a negative post 22, a positive connection tab 210, a negative connection tab 220, a battery cell 3, and a battery cell 6. The positive electrode connection piece 210, the negative electrode connection piece 220, the battery cell 3, and the battery cell 6 constitute a battery cell assembly 100. The battery cell 3 has a battery cell body 31 and a positive electrode tab 4 and a negative electrode tab 5 protruding from one end of the battery cell body 31, and the battery cell 6 has a battery cell body 61 and a positive electrode tab 7 and a negative electrode tab 8 protruding from one end of the battery cell body 61. The positive tab 4 of the battery cell 3 and the positive tab 7 of the battery cell 6 are connected to the positive connection sheet 210, and the negative tab 5 of the battery cell 3 and the negative tab of the battery cell 6 are connected to the negative connection sheet 220. The battery cell 3 and the battery cell 6 are placed in the casing 9, the top cover 1 seals the opening of the casing, the positive connecting piece 210 is connected with the positive pole 21 on the top cover 1, and the negative connecting piece 220 is connected with the negative pole 22 on the top cover 1. In this example, the battery cell 3 and the battery cell 6 are disposed opposite to each other along the width direction of the positive electrode connecting sheet 210, and in other embodiments, the battery cell 3 and the battery cell 6 may not be disposed opposite to each other.

As shown in fig. 1, 2, and 3, the connection structure of the positive tab 4 of the cell 3 and the positive tab 7 of the cell 6 to the positive connection tab 210 and the connection structure of the negative tab 5 of the cell 3 and the negative tab 8 of the cell 6 to the negative connection tab 220 are the same, and the connection structure of the positive tab 4, the positive tab 7, and the connection tabs will be described in detail. And 2 battery cells are taken as an example, and the method is also applicable when the number of the battery cells is more than 2 in other embodiments.

Specifically, as shown in fig. 1, 2, and 3, the positive electrode connecting sheet 210 has a first side 212, a second side 213 disposed opposite to the first side 212, and a first mounting surface connecting the first side 212 and the second side 213. The first side 212 and the second side 213 extend in the longitudinal direction of the positive electrode connecting sheet 210, i.e., in the direction of arrow B in fig. 2. The direction from the first side 212 to the second side 213 is the width direction of the positive electrode connecting sheet 210, i.e., the direction of the arrow a in fig. 2. The end of the positive tab 4 departing from the cell body 31 is a free end, and the end of the positive tab 7 departing from the cell body 61 is a free end. Positive tab 4 of electric core 3 and positive tab 7 of electric core 6 are connected to first installation face along the length direction of positive connection piece 210 in a staggered manner, and the free end of positive tab 4 of electric core 3 faces first side 212, and the free end of positive tab 7 of electric core 6 faces second side 213.

Through the above, it is not difficult to find that, as the tabs with the same polarity in the plurality of battery cells are connected to the first mounting surface in a staggered manner along the length direction of the connecting sheet, the space required for connecting the tabs in the direction from the first side edge 212 to the second side edge 213 of the connecting sheet, i.e., in the width direction of the connecting sheet, is reduced, the width of the connecting sheet can be correspondingly narrowed, the connecting sheet is narrower, the space of the top cover 1 required by the connecting sheet can be smaller and narrower, and the battery is narrower compared with the existing battery, so that the use requirement of the long and narrow battery of the existing product is met.

It is understood that in other embodiments, the number of the cells may be greater than 2, and the number of the free ends of the positive ears of the cells facing the first side 212 and the second side 213 may be determined according to actual situations.

In addition, in an embodiment, as shown in fig. 2 and fig. 3, the battery cells are a pair, the pair of battery cells is horizontally laid and arranged, and the battery cells 3 and the battery cells 6 are oppositely arranged at ends extending out of the tab. That is, a pair of battery cells 3 and 6 are respectively disposed on both sides of the top cover in the length direction 1, the large surface of the battery cell is parallel to the top cover, the length direction is the direction of arrow B in fig. 2, and the large surface is the surface with the largest area of the battery cell. Understandably, when the number of the cells is more than 2 in other embodiments, the cells can also be horizontally laid and arranged, so that the large surface of each cell is parallel to the top cover.

Implementation details of the present embodiment are specifically described below, and the following description is provided only for the sake of understanding and is not necessary for implementing the present embodiment.

Further, the positive tab 4 and the positive tab 7 each have a welding region 41 welded to the first mounting surface of the positive connection tab 210, and the welding region 41 of the positive tab 4 is spaced apart from the welding region 41 of the positive tab 7. The positive tab and the positive connection piece 210 can be connected together by resistance welding or laser welding.

Alternatively, as shown in fig. 1, 2 and 3, the width of the positive electrode tab 210 ranges from 12mm to 30 mm. The distance of the width a of the positive electrode connecting piece 210 may be within a range of an interval made up of any two of 12mm, 15mm, 16mm, 17mm, or 18 mm. The width direction of the land 41 and the width direction of the positive electrode connecting piece 210 are both the directions a in fig. 2.

A weld-protecting sheet is connected to the upper surfaces of positive tab 4 and positive tab 7, and weld zone 41 is located in the area of the weld-protecting sheet.

In another embodiment, as shown in fig. 4, the negative electrode tab 5 of the battery cell 3 has a plurality of tabs spaced apart along the length direction of the positive electrode connecting piece 210. There may be a plurality of positive electrode tabs 7 of the battery cell 6. It is understood that in other embodiments, there may be more than one negative tab 8 of the battery cell 6, or more than one positive tab 4 of the battery cell 3.

The welding of the positive tab and the positive connection tab 210 is specifically described above, and the structure of the negative tab and the negative connection tab 220 is the same, and will not be described in detail here.

It is understood that in other embodiments, the secondary battery may have only the positive electrode tabs of the plurality of battery cells connected to the first mounting surface in a staggered manner along the length direction of the positive electrode connecting piece 210. Alternatively, the secondary battery may have only the negative electrode tabs of the plurality of battery cells connected to the first mounting surface in a staggered manner along the longitudinal direction of the negative electrode connecting piece 220.

In addition, as shown in fig. 3, the positive tab 210 has a positive mating region 211 for welding the positive post, and the negative tab 220 has a negative mating region 221 for welding the negative post. Wherein the positive tab and the negative tab are both located between the positive junction region 211 and the negative junction region 221.

It is to be understood that in other embodiments, only the positive electrode tab of the secondary battery may be welded to the positive electrode tab mentioned in the first embodiment. Alternatively, only the negative electrode tab may be connected to the negative electrode tab by welding.

A second embodiment of the present invention provides an electronic apparatus, including: the secondary battery mentioned in the above embodiment. The electronic equipment can be vehicles such as automobiles and electric trains or other equipment needing batteries.

The electronic device of the present application is not particularly limited, and may be any electronic device known in the art. In some embodiments, the electronic device may include, but is not limited to, a notebook computer, a pen-input computer, a mobile computer, an electronic book player, a portable phone, a portable facsimile machine, a portable copier, a portable printer, a headphone, a video recorder, a liquid crystal television, a handheld cleaner, a portable CD player, a mini-disc, a transceiver, an electronic organizer, a calculator, a memory card, a portable recorder, a radio, a backup power source, an electric motor, an automobile, a motorcycle, a power-assisted bicycle, a lighting fixture, a toy, a game machine, a clock, an electric tool, a flashlight, a camera, a large household battery, a lithium ion capacitor, and the like.

While the preferred embodiments of the present invention have been described in detail above, it should be understood that aspects of the embodiments can be modified, if necessary, to employ aspects, features and concepts of the various patents, applications and publications to provide yet further embodiments.

These and other changes can be made to the embodiments in light of the above detailed description. In general, in the claims, the terms used should not be construed to be limited to the specific embodiments disclosed in the specification and the claims, but should be construed to include all possible embodiments along with the full scope of equivalents to which such claims are entitled.

It will be understood by those skilled in the art that the foregoing embodiments are specific examples of the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in its practical application.

Claims (10)

1. A secondary battery, characterized by comprising:

a housing having an opening;

the top cover is provided with a pole mounting hole; the top cover covers the opening and is connected with the shell;

the pole column penetrates through the top cover through the pole column mounting hole, and a bottom plate of the pole column is positioned on the back surface of the top cover;

the connecting sheet is electrically connected with the pole and is provided with a first side edge, a second side edge opposite to the first side edge and a first mounting surface for connecting the first side edge and the second side edge, and the extending direction of the first side edge and the second side edge is the length direction of the connecting sheet; and the number of the first and second groups,

the battery comprises a plurality of battery cells, a plurality of battery cells and a plurality of battery cells, wherein each battery cell is provided with a battery cell body and a lug protruding from one end of the battery cell body, and one end of the lug departing from the battery cell body is a free end; the electrode lugs with the same polarity in the battery cells are connected to the first mounting surface in a staggered manner along the length direction of the connecting sheets, and the polarity of the electrode posts connected to the connecting sheets is the same as that of the electrode lugs welded on the connecting sheets; the free ends of the two tabs with the same polarity in the battery cell face the first side edge and the second side edge respectively.

2. The secondary battery as claimed in claim 1, wherein the tab has a welding region welded to the first mounting surface of the connecting tab;

wherein the weld zone of the tab with its free end facing the first side edge is spaced from the weld zone of the tab with its free end facing the second side edge.

3. The secondary battery of claim 2, wherein the connecting tab has a width in the range of 12mm to 30 mm.

4. The secondary battery according to claim 2, wherein a weld protection sheet is attached to a surface of the tab facing away from the connecting tab, the weld zone being located in an area of the weld protection sheet.

5. The secondary battery of claim 1, wherein on the same cell, there are a plurality of tabs with free ends facing the first side edge or a plurality of tabs with free ends facing the second side edge.

6. The secondary battery of claim 1, wherein the cells are a pair, and the pair of cells is disposed opposite to each other along the width direction of the connecting sheet.

7. The secondary battery of claim 1, wherein each of the cells is arranged horizontally, and at least one pair of the cells is disposed opposite to each other at an end thereof extending out of the tab.

8. The secondary battery according to claim 1, wherein the poles have a pair and are spaced apart, being a positive pole and a negative pole, respectively;

the connecting pieces are a pair of alternately-opened positive connecting pieces connected with the positive pole column and negative connecting pieces connected with the negative pole column respectively; and the positive lug of each battery cell is welded with the positive connecting piece, and the negative lug of each battery cell is welded with the negative connecting piece.

9. The secondary battery of claim 8, wherein the positive tab has a facing region for welding the positive post; the negative connecting sheet is provided with a negative butt joint area for welding the negative pole;

and the positive electrode lug and the negative electrode lug are both positioned between the positive butt joint area and the negative butt joint area.

10. An electronic device, comprising: the secondary battery according to any one of claims 1 to 9.

Images