CN214848802U

CN214848802U - Columnar battery and battery module

Info

Publication number: CN214848802U
Application number: CN202120649813.9U
Authority: CN
Inventors: 刘俊鹏
Original assignee: Hubei Eve Power Co Ltd
Current assignee: Hubei Eve Power Co Ltd
Priority date: 2021-03-30
Filing date: 2021-03-30
Publication date: 2021-11-23
Anticipated expiration: 2031-03-30

Abstract

The utility model relates to a battery technology field specifically discloses a column battery and battery module. The utility model discloses a column battery includes casing, first electrode and electric core, and electric core setting is in the section of thick bamboo intracavity of casing, and first electrode setting is in the nozzle department of casing, and the casing is conductible material, and electric core is including setting up first utmost point ear and the second utmost point ear at length direction both ends respectively, and first utmost point ear is connected with first electrode electricity, and second utmost point ear is connected with the casing electricity, and the casing of column battery deviates from the tip of first electrode and is provided with the arch. The utility model discloses a column battery energy density is big, occupies smallly, and weight is low, with low costs.

Description

Columnar battery and battery module

Technical Field

The utility model relates to a battery technology field especially relates to a column battery and battery module.

Background

The conventional structure of the columnar battery is cylindrical at the present stage, and during the assembly process of the battery, a plastic support is needed for fixing a busbar, FPC (flexible printed circuit) acquisition, insulation protection and the like, so that space waste is caused, and the overall energy density of the system is directly influenced.

In addition, a limiting support is required to be arranged among the batteries, and not only does the limiting support occupy space and increase weight, but also die sinking cost and material cost are increased.

SUMMERY OF THE UTILITY MODEL

An object of the embodiment of the utility model is to provide a column battery, its energy density is big, occupies smallly, and weight is low, with low costs.

Another object of the embodiment is to provide a battery module, its is small, with low costs, and capacity density is big.

To achieve the purpose, the embodiment of the present invention adopts the following technical solutions:

in a first aspect, a cylindrical battery is provided, which comprises a casing, a first electrode and an electric core, wherein the electric core is arranged in a barrel cavity of the casing, the first electrode is arranged at a barrel opening of the casing, the casing is made of conductive materials, the electric core comprises a first tab and a second tab which are respectively arranged at two ends of the length direction, the first tab is electrically connected with the first electrode, the second tab is electrically connected with the casing, and the end part of the casing, which deviates from the first electrode, is provided with a protrusion.

As a preferable scheme of the cylindrical battery, the housing is provided with a second electrode extending at the opening, and the first electrode and the second electrode are arranged at intervals.

As a preferable mode of the cylindrical battery, an insulating support is provided between the first electrode and the second electrode.

As a preferable scheme of the cylindrical battery, the insulating support is provided with through holes in a penetrating manner, and the through holes are arranged at intervals with the first electrode and the second electrode.

In a preferred embodiment of the columnar battery, the shaft portion of the insulating holder is provided with a liquid injection hole.

As a preferable scheme of the cylindrical battery, the cylindrical battery further comprises an insulating layer wrapping the side surface of the case.

As a preferable scheme of the cylindrical battery, a groove is provided at a joint of the second electrode and the case, and an edge of the insulating layer is disposed in the groove.

As a preferable aspect of the cylindrical battery, the first electrode and the second electrode are both of an annular structure.

As a preferable aspect of the cylindrical battery, the first electrode and the second electrode are concentrically arranged.

In a second aspect, a battery module is provided, which includes a fixing plate and a cylindrical battery, wherein the cylindrical battery is disposed in the box.

As a preferred scheme of battery module, be provided with the shrinkage pool on the box, the shrinkage pool can hold and fix the arch of column battery.

The utility model discloses beneficial effect does:

the cylindrical battery is formed by arranging a shell, a first electrode and a battery cell, wherein the battery cell is arranged in a barrel cavity of the shell, the first electrode is arranged at a barrel opening of the shell, the shell is made of conductive materials, in addition, the battery cell comprises a first lug and a second lug which are respectively arranged at two ends in the length direction, the first lug is electrically connected with the first electrode, and the second lug is electrically connected with the shell. Moreover, the end part of the shell of the columnar battery, which deviates from the first electrode, is provided with a protrusion, and the protrusion is fixedly connected with external equipment, so that an extra limiting support does not need to be arranged outside the shell, and the increase of the weight of the battery, the die sinking cost and the material cost is avoided.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Fig. 1 is a schematic cross-sectional view of a cylindrical battery according to an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a cylindrical battery 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.

In the figure:

1. a columnar battery; 11. a housing; 111. a second electrode; 112. a protrusion; 113. a groove; 12. a first electrode; 13. an electric core; 131. a first tab; 132. a second tab; 14. an insulating support; 141. a through hole; 142. a liquid injection hole; 15. an insulating layer; 2. a box body; 21. a concave hole.

Detailed Description

In order to make the technical problems, technical solutions and technical effects achieved by the present invention more clear, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Referring to fig. 1, an embodiment of the present invention provides a cylindrical battery 1, including a housing 11, a first electrode 12 and a battery cell 13, the battery cell 13 is disposed in a cylindrical cavity of the housing 11, the first electrode 12 is disposed at a cylindrical opening of the housing 11, the housing 11 is made of a conductive material, the battery cell 13 includes a first tab 131 and a second tab 132 respectively disposed at two ends of the length direction, the first tab 131 is electrically connected to the first electrode 12, the second tab 132 is electrically connected to the housing 11, and a protrusion 112 is disposed at an end of the housing 11 of the cylindrical battery 1 facing away from the first electrode 12.

The embodiment of the utility model provides a form column battery 1 through setting up casing 11, first electrode 12 and electric core 13, wherein, electric core 13 sets up in the barrel cavity of casing 11, and first electrode 12 sets up the barrel mouth department at casing 11, and casing 11 is the material that can lead the electricity, and electric core 13 is including setting up first utmost point ear 131 and second utmost point ear 132 at length direction both ends respectively, and first utmost point ear 131 is connected with first electrode 12 electricity, and second utmost point ear 132 is connected with casing 11 electricity. Furthermore, the end of the casing 11 of the cylindrical battery 1 departing from the first electrode 12 is provided with a protrusion 112, and is fixedly connected with an external device through the protrusion 112, so that an additional limiting bracket is not required to be arranged outside the casing 11, and the increase of the battery weight, the die sinking cost and the material cost is avoided. Therefore, the utility model discloses column battery 1 energy density is big, occupies smallly, and weight is low, with low costs.

Preferably, referring to fig. 1, the housing 11 is provided with the second electrode 111 extending at the opening, and the first electrode 12 and the second electrode 111 are arranged at an interval, so that the first electrode 12 and the second electrode 111 are arranged on the same side of the housing 11, the arrangement amount of the bracket for fixedly connecting the two electrodes and the arrangement amount of the electrical connection member are reduced, the increase of space waste is avoided, and the energy density of the battery system is improved. In this embodiment, the original structure of one tab at each of the two ends of the battery cell 13 does not need to be changed, the first tab 131 and the second tab 132 are respectively electrically connected to the first electrode 12 and the casing 11, and the casing 11 is electrically conductive, and the second electrode 111 is electrically connected to the casing 11, so that the first tab 131 and the second tab 132 of the battery cell 13 can be uniformly output to the first electrode 12 and the second electrode 111 located on the same side of the casing 11, and an additional fixing bracket is not needed to be disposed in the casing 11, thereby further reducing the occupied volume of the cylindrical battery 1.

More preferably, with continued reference to FIG. 1, the width of the protrusion 112 is less than the width of the housing 11 to reduce the material cost of the housing 11.

In an embodiment, with continued reference to fig. 1, an insulating support 14 is disposed between the first electrode 12 and the second electrode 111, and the insulating support 14 fixes and spaces the first electrode 12 and the second electrode 111, and simultaneously can ensure the insulating connection between the first electrode 12 and the second electrode 111, thereby avoiding short circuit of the cylindrical battery 1 of the present embodiment.

Further, referring to fig. 1 and fig. 2, the insulating support 14 is provided with a through hole 141 in a penetrating manner, and the through hole 141 of the present embodiment can also reduce the material usage amount and cost of the insulating support 14, and can further reduce the weight and volume of the insulating support 14 on the premise of ensuring the structural strength of the insulating support 14, thereby further reducing the weight and volume of the cylindrical battery 1 of the present embodiment. Preferably, the through holes 141 are spaced apart from the first electrode 12 and the second electrode 111, so as to ensure the fixed connection between the insulating support 14 and the first electrode 12 and the second electrode 111 and prevent the insulating support 14 from being separated from the first electrode 12 and the second electrode 111.

On the other hand, referring to fig. 1 and 2, the shaft portion of the insulating holder 14 is provided with a liquid injection hole 142, and an electrolyte is injected into the case 11 through the liquid injection hole 142, so that positive ions and negative ions can be transmitted between the first tab 131 and the second tab 132, and a stable current can be continuously generated.

In another embodiment, referring to fig. 1, the cylindrical battery 1 of the embodiment of the present invention further includes an insulating layer 15, and the insulating layer 15 wraps the side surface of the housing 11, so as to avoid the housing 11 being electrically connected to the outside, causing a short circuit and damaging the cylindrical battery 1.

Preferably, referring to fig. 1, a groove 113 is provided at the connection between the second electrode 111 and the housing 11, the edge of the insulating layer 15 is disposed in the groove 113, and the insulating layer 15 is clamped by the groove 113, so that the insulating layer 15 and the housing 11 are prevented from being separated from the housing 11 due to axial relative displacement.

Alternatively, referring to fig. 2, the first electrode 12 and the second electrode 111 are both ring-shaped structures, so as to facilitate the assembly between the first electrode 12 and the second electrode 111, and also to facilitate the installation of the first electrode 12 and the second electrode 111 with a connecting member, which may be disposed in a gap between the first electrode 12 and the second electrode 111.

Preferably, referring to fig. 2, the first electrode 12 and the second electrode 111 are concentrically disposed, which can facilitate the fabrication of the cylindrical battery 1.

In particular, the liquid injection hole 142 may be provided in the inner ring of the first electrode 12 to facilitate the operation of positioning the liquid injection port with the cylindrical battery 1 at the time of liquid injection.

Referring to fig. 3, the embodiment of the present invention further provides a battery module, which includes a box body 2 and the cylindrical battery 1 of any one of the above embodiments, wherein the cylindrical battery 1 is disposed in the box body 2. The cylindrical battery 1 in this embodiment may have the same structure and achieve the same effect as the cylindrical battery 1 in the above embodiment, and the description of this embodiment is omitted.

Further, referring to fig. 3, a concave hole 21 is formed in the case 2, and the concave hole 21 can accommodate and fix the protrusion 112 of the cylindrical battery 1, so that the cylindrical battery 1 can be directly and fixedly connected with the case 2, and the number of additional fixing brackets is reduced.

In the description herein, it is to be understood that the terms "upper", "lower", "right", and the like are used in a descriptive sense or positional relationship based on the orientation or positional relationship shown in the drawings for convenience of description and simplicity of operation, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used merely for descriptive purposes and are not intended to have any special meaning.

In the description herein, references to the description of "an embodiment," "an example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be appropriately combined to form other embodiments as will be appreciated by those skilled in the art.

The technical principle of the present invention is described above with reference to specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without any inventive effort, which would fall within the scope of the present invention.

Claims

1. The utility model provides a column battery, its characterized in that, includes casing, first electrode and electric core, the electric core sets up the section of thick bamboo intracavity of casing, first electrode sets up the nozzle department of casing, the casing is the material that can lead the electricity, the electric core is including setting up first utmost point ear and the second utmost point ear at length direction both ends respectively, first utmost point ear with first electrode electricity is connected, the second utmost point ear with the casing electricity is connected, the casing deviates from the tip of first electrode is provided with the arch.

2. The cylindrical battery as claimed in claim 1, wherein the housing is provided with a second electrode extending from the nozzle, and the first electrode and the second electrode are spaced apart from each other.

3. The cylindrical battery according to claim 2, wherein an insulating support is provided between the first electrode and the second electrode.

4. The cylindrical battery according to claim 3, wherein the insulating support is provided with through holes therethrough, the through holes each being spaced apart from the first electrode and the second electrode.

5. The cylindrical battery according to claim 3, wherein the shaft portion of the insulating holder is provided with a liquid injection hole.

6. The cylindrical battery according to claim 2, further comprising an insulating layer wrapping a side surface of the case.

7. The cylindrical battery according to claim 6, wherein a groove is provided at a junction of the second electrode and the case, and an edge of the insulating layer is disposed in the groove.

8. The cylindrical battery of claim 2, wherein the first electrode and the second electrode are both annular structures.

9. The cylindrical battery of claim 8, wherein the first electrode and the second electrode are concentrically disposed.

10. A battery module, comprising a case and the cylindrical battery of any one of claims 1 to 9, wherein the cylindrical battery is disposed in the case.

11. The battery module according to claim 10, wherein the case is provided with a recess capable of receiving and fixing the protrusion of the cylindrical battery.