CN219626851U - Square electric core, battery monomer, battery and electric equipment - Google Patents

Abstract

The utility model discloses a square cell, a battery and electric equipment, and relates to the field of batteries. This square electric core includes the electric core main part, is provided with a plurality of positive ears and a plurality of negative pole ear in the electric core main part, and arbitrary positive ear all includes a plurality of positive ears that stack gradually the setting, and arbitrary negative pole ear all includes a plurality of negative pole ears that stack gradually the setting. The square battery cell provided by the utility model has higher energy conversion efficiency and better safety.

Description

Square electric core, battery monomer, battery and electric equipment

Technical Field

The utility model relates to the field of batteries, in particular to a square cell, a battery and electric equipment.

Background

The battery cell mainly comprises a battery cell main body, and a positive electrode lug and a negative electrode lug which are convexly arranged on the battery cell main body, wherein the positive electrode lug is used for being connected with a positive electrode column on the battery shell, and the negative electrode lug is used for being connected with a negative electrode column on the battery shell.

At present, the number of positive electrode lugs and negative electrode lugs arranged on a battery core main body of a square battery core in the market is one. The current must flow through positive pole ear and negative pole ear and outside formation return circuit, because the length size of square electric core is great, leads to the electric current to flow to the distance of utmost point ear longer, and resistance increases along with the increase of distance to produce high temperature in discharge process, lead to the energy conversion inefficiency of electric core, security poor.

Disclosure of Invention

The utility model aims to provide a square battery cell which has higher energy conversion efficiency and better safety.

Another object of the present utility model is to provide a battery cell having higher energy conversion efficiency and better safety.

It is still another object of the present utility model to provide a battery having higher energy conversion efficiency and better safety.

It is still another object of the present utility model to provide an electrical device with higher energy conversion efficiency and better safety.

The utility model provides a technical scheme that:

the square battery cell comprises a battery cell main body, wherein a plurality of positive electrode lugs and a plurality of negative electrode lugs are arranged on the battery cell main body, the positive electrode lugs comprise a plurality of positive electrode lugs which are sequentially stacked, and the negative electrode lugs comprise a plurality of negative electrode lugs which are sequentially stacked.

Further, the positive plate of the battery core main body is provided with a plurality of positive lugs on any layer, and the positive lugs correspond to the positive lugs respectively;

the negative electrode plate of the battery cell main body is provided with a plurality of negative electrode lugs on any layer, and the negative electrode lugs correspond to the negative electrode lugs respectively.

Further, the positive electrode lugs and the negative electrode lugs are both arranged at the same end of the battery cell main body in a protruding mode.

Further, the plurality of negative electrode ears comprise a first negative electrode ear and a second negative electrode ear, and the plurality of positive electrode ears are distributed between the first negative electrode ear and the second negative electrode ear in the length direction of the same end of the battery cell main body.

Further, the plurality of positive electrode ears comprise a first positive electrode ear and a second positive electrode ear, and the first positive electrode ear and the second positive electrode ear are arranged at intervals between the first negative electrode ear and the second negative electrode ear.

Further, the first positive electrode lug and the second positive electrode lug are respectively arranged at two sides of the center position of the end wall of the battery cell main body in the length direction.

The embodiment of the utility model also provides a battery cell, which comprises a shell and the square battery cell, wherein the square battery cell comprises a battery cell main body, a plurality of positive electrode lugs and a plurality of negative electrode lugs are arranged on the battery cell main body, any positive electrode lug comprises a plurality of positive electrode lugs which are sequentially stacked, any negative electrode lug comprises a plurality of negative electrode lugs which are sequentially stacked, and the square battery cell is arranged in the shell.

Further, a plurality of tab brackets are arranged on the shell, and a plurality of positive electrode tabs and a plurality of negative electrode tabs are respectively fixed through a plurality of tab brackets.

The embodiment of the utility model also provides a battery, which comprises a plurality of battery cells, wherein each battery cell comprises a shell and a square battery cell, each square battery cell comprises a battery cell main body, a plurality of positive electrode lugs and a plurality of negative electrode lugs are arranged on the battery cell main body, any positive electrode lug comprises a plurality of positive electrode lugs which are sequentially stacked, any negative electrode lug comprises a plurality of negative electrode lugs which are sequentially stacked, and the square battery cell is arranged in the shell.

The embodiment of the utility model also provides electric equipment, which comprises the battery monomer or the battery.

Compared with the prior art, the square battery cell provided by the utility model has the advantages that as the battery cell main body is provided with the plurality of positive electrode lugs and the plurality of negative electrode lugs, the internal current can be conducted with the outside through the nearest electrode lugs, so that the flow path of the internal current is effectively shortened, the energy conversion efficiency is improved, and the heating value is reduced. Therefore, the square battery cell provided by the utility model has the beneficial effects that: has higher energy conversion efficiency and better safety.

Drawings

In order to more clearly illustrate the technical solution of the embodiments of the present utility model, the drawings that are required to be used in the embodiments will be briefly described. It is appreciated that the following drawings depict only certain embodiments of the utility model and are therefore not to be considered limiting of its scope. Other relevant drawings may be made by those of ordinary skill in the art without undue burden from these drawings.

Fig. 1 is a schematic diagram of an exploded structure of a battery cell according to an embodiment of the present utility model;

fig. 2 is a schematic view of a part of the structure of the housing in fig. 1.

Icon: 100-battery cells; 110-a housing; 111-positive electrode posts; 112-a negative electrode column; 113-a tab support; 120-square battery cells; 121-a cell body; 122-a first positive electrode ear; 123-a second positive electrode ear; 124-a first negative ear; 125-second negative ear.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present utility model more clear, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It will be apparent that the described embodiments are some, but not all, embodiments of the utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. 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.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "left", "right", etc. are based on the directions or positional relationships shown in the drawings, or the directions or positional relationships conventionally put in place when the inventive product is used, or the directions or positional relationships conventionally understood by those skilled in the art are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific direction, be configured and operated in a specific direction, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, terms such as "disposed," "connected," and the like are to be construed broadly, and for example, "connected" may be either fixedly connected, detachably connected, or integrally connected; 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 can be understood by those of ordinary skill in the art according to the specific circumstances.

The following describes specific embodiments of the present utility model in detail with reference to the drawings.

Examples

Referring to fig. 1, fig. 1 is a schematic diagram illustrating an exploded structure of a battery cell 100 according to the present embodiment.

The battery cell 100 provided in this embodiment includes a housing 110 and a square battery cell 120, where the square battery cell 120 is disposed inside the housing 110. The square battery cell 120 comprises a battery cell main body 121, a plurality of positive electrode lugs and a plurality of negative electrode lugs are arranged on the battery cell main body 121, a plurality of positive electrode posts 111 and a plurality of negative electrode posts 112 are correspondingly arranged on the shell 110, the positive electrode lugs are respectively electrically connected with the positive electrode posts 111, and the negative electrode lugs are respectively electrically connected with the negative electrode posts 112.

It is understood that any positive electrode ear portion includes a plurality of positive electrode ears sequentially stacked in the thickness direction of the battery cell body 121, and any negative electrode ear portion includes a plurality of negative electrode ears sequentially stacked in the thickness direction of the battery cell body 121.

The battery core main body 121 of the square battery core 120 is formed by winding a positive plate, a negative plate and a diaphragm, and considering that the length dimension of the battery core main body 121 of the square battery core 120 is larger, only one positive lug is arranged on each layer of the positive plate in the thickness direction in the prior art, and only one negative lug is arranged on each layer of the negative plate in the thickness direction, so that one positive lug and one negative lug are formed, the current is led to be extremely long from the inside of the battery to the outside of the battery, and extremely large internal resistance is generated, and high temperature is generated in the discharging process, so that the energy conversion efficiency of the battery and the safety of the battery are not facilitated.

In the square battery cell 120 provided in this embodiment, the positive electrode plate of the battery cell main body 121 is provided with positive electrode lugs at a plurality of positions of each layer in the thickness direction, the negative electrode plate is provided with negative electrode lugs at a plurality of positions of each layer in the thickness direction, that is, a plurality of positive electrode lugs and a plurality of negative electrode lugs are formed, so that in practical application, internal current can flow out from the nearest positive electrode lugs to the outside of the battery, the current path is greatly shortened, smaller resistance is generated, heat is reduced, and the energy conversion efficiency and the safety of the battery cell 100 are improved.

In this embodiment, the plurality of positive electrode ears and the plurality of negative electrode ears are all protruding at the same end of the cell body 121. Correspondingly, the positive electrode posts 111 and the negative electrode posts 112 on the housing 110 are disposed on the same end. In other embodiments, according to practical application conditions, the setting positions of the positive electrode ears or the negative electrode ears can be adjusted, that is, the positive electrode ears and the negative electrode ears can be respectively set at two opposite ends of the battery cell main body 121, and the setting positions of the positive electrode posts 111 and the negative electrode posts 112 on the housing 110 can be correspondingly adjusted.

In fact, in the present embodiment, the number of the negative electrode ears is two, namely, the first negative electrode ear 124 and the second negative electrode ear 125, and the number of the positive electrode ears is also two, namely, the first positive electrode ear 122 and the second positive electrode ear 123. In the length direction of the end wall of the same end of the battery cell body 121, the first positive electrode lug 122 and the second positive electrode lug 123 are arranged between the first negative electrode lug 124 and the second negative electrode lug 125 at intervals, and the first positive electrode lug 122 and the second positive electrode lug 123 are respectively arranged at two sides of the center position of the end wall of the battery cell body 121 in the length direction.

Considering that the automobile is generally in an underground parking lot when being charged, the environment temperature is low, and the automobile is generally outdoors when being discharged, and the environment temperature is high. Therefore, in this embodiment, the first positive electrode ear portion 122 and the second positive electrode ear portion 123 are disposed at the middle position, and the first negative electrode ear portion 124 and the second negative electrode ear portion 125 are disposed at the outer position, so that the current path can be obviously shortened no matter in the case of charging or discharging, thereby reducing the heat productivity of charging or discharging, and effectively improving the safety.

It will be appreciated that in other embodiments, when the positive and negative electrode ears are other numbers, the positive electrode ears may be arranged closer to the center of the end of the cell body 121, and the negative electrode ears may be arranged closer to the edges.

Referring to fig. 2 in combination, fig. 2 is a schematic view of a portion of the structure of the housing 110.

In order to effectively fix the plurality of positive electrode ears and the plurality of negative electrode ears, in this embodiment, a plurality of tab holders 113 are correspondingly disposed inside one end of the housing 110, and the plurality of positive electrode ears and the plurality of negative electrode ears are respectively fixed by the plurality of tab holders 113.

In summary, the square battery cell 120 and the battery cell 100 provided in the embodiment have higher energy conversion efficiency and better safety.

The present embodiment also provides a battery including a plurality of the foregoing battery cells 100. It is understood that the battery may be integrated by a plurality of battery cells 100 in series-parallel connection, and may be a battery module or a battery pack as an independent charge/discharge device.

The embodiment also provides an electric device, where the electric device includes the battery unit 100 or the battery, and the battery unit 100 or the battery provides electric energy for the electric device.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (9)

1. The utility model provides a square electric core, its characterized in that, includes the electric core main part, be provided with a plurality of anodal ears and a plurality of negative pole ear in the electric core main part, wantonly anodal ear all includes a plurality of anodal ears that stack gradually the setting, wantonly the negative pole ear all includes a plurality of negative pole ears that stack gradually the setting, a plurality of anodal ear and a plurality of negative pole ear all are protruding to be located the same one end of electric core main part.

2. The square battery cell according to claim 1, wherein the positive plate of the battery cell main body is provided with a plurality of positive lugs on any layer, and the positive lugs correspond to the positive lugs respectively;

the negative electrode plate of the battery cell main body is provided with a plurality of negative electrode lugs on any layer, and the negative electrode lugs correspond to the negative electrode lugs respectively.

3. The square cell of claim 1, wherein the plurality of negative electrode ears comprise a first negative electrode ear and a second negative electrode ear, and the plurality of positive electrode ears are distributed between the first negative electrode ear and the second negative electrode ear in a length direction of the same end of the cell body.

4. The square battery cell of claim 3, wherein the plurality of positive electrode ears comprise a first positive electrode ear and a second positive electrode ear, the first positive electrode ear and the second positive electrode ear being disposed at an interval between the first negative electrode ear and the second negative electrode ear.

5. The square battery cell according to claim 4, wherein the first positive electrode ear portion and the second positive electrode ear portion are respectively disposed on both sides in a longitudinal direction of a center position of an end wall of the battery cell main body.

6. A battery cell comprising a housing and a square cell as defined in any one of claims 1-5, the square cell being disposed within the housing.

7. The battery cell as recited in claim 6, wherein a plurality of tab brackets are provided on the housing, and a plurality of the positive electrode tabs and a plurality of the negative electrode tabs are respectively fixed by a plurality of the tab brackets.

8. A battery comprising a plurality of cells according to any one of claims 6-7.

9. A powered device comprising a battery cell as claimed in any one of claims 6-7, or comprising a battery as claimed in claim 8.