CN220209078U

CN220209078U - Cylindrical battery

Info

Publication number: CN220209078U
Application number: CN202321483409.4U
Authority: CN
Inventors: 宋章训; 厉强; 杨庆亨
Original assignee: Zhongxing Pylon Battery Co Ltd
Current assignee: Zhongxing Pylon Battery Co Ltd
Priority date: 2023-06-12
Filing date: 2023-06-12
Publication date: 2023-12-19
Anticipated expiration: 2033-06-12

Abstract

The utility model provides a cylindrical battery which comprises a shell, a cover plate, a heat conducting core pipe and a winding core main body, wherein the winding core main body is arranged in the shell, the center of the winding core main body is of a hollow structure, the heat conducting core pipe is arranged in the center of the winding core main body, the cover plate is covered on the shell, and two ends of the heat conducting core pipe respectively abut against the shell and the cover plate. The utility model has the advantages that: the first and second polarities are electrically connected in a physical contact mode with the conductive material, welding or riveting connection is not needed, the connection mode is friendly, the safety is higher, and the yield in the processing process is high; the first and second poles are designed in a connection mode without a current collecting disc and connecting sheets, the number of internal structural parts is small, the cost is low, a heat dissipation structure is arranged in the middle of the heat dissipation structure, heat conduction can be rapidly conducted, and the safety and the cycle life are improved.

Description

Cylindrical battery

Technical Field

The utility model relates to the technical field of batteries, in particular to a cylindrical battery.

Background

The cylindrical battery has high capacity, long cycle life and wide use environment temperature. The product is applied to solar lamps, lawn lamps, backup energy sources, electric tools, toy models and photovoltaic energy sources.

1. The large cylindrical battery structural member has more structural members and high cost; the common positive electrode and the negative electrode comprise a current collecting disc, a connecting sheet and a cover plate;

2. because of more structural members, more laser welding procedures and more metal scraps are caused, the safety performance is affected, and meanwhile, the reject ratio is high in mass production and processing;

3. when the height direction of the cylindrical battery is large, the heat dissipation of the middle portion is difficult.

Disclosure of Invention

Aiming at the defects existing in the prior art, the utility model aims to provide a cylindrical battery, wherein a heat conducting core pipe is arranged in the middle of the battery, and accumulated heat in the winding core can be rapidly guided out to a cylindrical shell or a cover plate through the heat conducting core pipe in the use process, so that the safety and the cycle life are improved; the first tab and the second tab are both conductive in physical contact, and riveting and welding modes are canceled.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the utility model provides a cylinder battery, includes casing, apron, heat conduction core pipe and rolls up the core main part, the inside core main part that rolls up that is equipped with of casing, roll up core main part center department and be hollow structure, roll up the inside center department of core main part and be equipped with the heat conduction core pipe, the casing upper cover has the apron, heat conduction core pipe both ends are contradicted casing and apron respectively.

Preferably, the two ends of the winding core main body are respectively provided with a first tab and a second tab, and the first tab and the second tab are respectively provided with a conductive layer.

Preferably, the conductive layer is in a truncated cone-shaped structure, a through hole for the heat conduction core tube to pass through is formed in the center of the conductive layer, and the diameter of the through hole is equal to that of the heat conduction core tube.

Preferably, the parts of the first tab and the second tab, which extend out of the winding core main body, are smaller than or equal to 3mm.

Preferably, the conductive layer on the first tab is in close contact with the cover plate, and the conductive layer on the second tab is in close contact with the bottom end inside the housing.

Preferably, an insulating sheet is arranged between the edge end of the cover plate and the inner surface of the shell.

Preferably, the cover plate and the shell are fixed by rolling grooves, pressing and sealing at the position of the insulating sheet.

Preferably, the cover plate is provided with a liquid injection hole, and the cover plate is provided with an explosion-proof valve positioned in the liquid injection hole.

Preferably, the shell adopts a steel shell or an aluminum shell, and the cover plate adopts a steel cover or an aluminum cover.

Preferably, the length of the heat conduction core tube is longer than that of the winding core main body.

Compared with the prior art, the utility model has the beneficial effects that:

1. the heat conducting core pipe is arranged in the middle of the battery, and accumulated heat in the winding core can be rapidly guided out to the cylindrical shell or the cover plate through the heat conducting core pipe in the use process, so that the safety and the cycle life are improved;

2. the first polarity and the second polarity are designed to be connected without a current collecting disc and a connecting sheet, so that the number of internal structural parts is small and the cost is low;

3. the first and second poles are electrically connected in a physical contact mode with the conductive material, welding or riveting connection is not needed in the scheme, the connection mode is friendly, the safety is higher, and the yield in the processing process is high;

4. the physical contact is used, so that the parts of the first and second lugs extending out of the diaphragm are short, the use amount of foil materials can be saved, and the utilization rate of the internal space of the battery is improved;

drawings

The disclosure of the present utility model is described with reference to the accompanying drawings. It should be understood that the drawings are for purposes of illustration only and are not intended to limit the scope of the present utility model in which like reference numerals are used to designate like parts. Wherein:

fig. 1 is a schematic view of a cylindrical battery according to the present utility model;

FIG. 2 is a schematic view of the insulation sheet of the present utility model;

FIG. 3 is a schematic diagram of a conductive layer according to the present utility model;

FIG. 4 is a schematic view of the connection between the first tab, the second tab and the winding core body according to the present utility model;

FIG. 5 is a side view of the cover plate of the present utility model;

fig. 6 is a top view of the cover plate of the present utility model.

The reference numerals in the drawings indicate: 10. a housing; 11. a first tab; 12. a second lug; 20. a cover plate; 30. a heat conduction core tube; 40. a conductive layer; 50. an insulating sheet; 60. an explosion-proof valve; 70. a winding core main body.

Detailed Description

It is to be understood that, according to the technical solution of the present utility model, those skilled in the art may propose various alternative structural modes and implementation modes without changing the true spirit of the present utility model. Accordingly, the following detailed description and drawings are merely illustrative of the utility model and are not intended to be exhaustive or to limit the utility model to the precise form disclosed.

As shown in fig. 1 to 3, as a cylindrical battery of the present utility model, the cylindrical battery comprises a housing 10, a cover plate 20, a heat conducting core tube 30 and a winding core main body 70, wherein the winding core main body 70 is arranged in the housing 10, the center of the winding core main body 70 is in a hollow structure, the heat conducting core tube 30 is arranged in the center of the winding core main body 70, the cover plate 20 is covered on the housing 10, and two ends of the heat conducting core tube 30 respectively abut against the housing 10 and the cover plate 20.

The two ends of the winding core main body 70 are respectively provided with a first tab 11 and a second tab 12, and the first tab 11 and the second tab 12 are respectively provided with a conductive layer 40.

Specifically, in the upper half part of the cylindrical battery, the first tab 11 directly contacts with the lower bottom surface of the conductive layer 40, the upper bottom surface of the conductive layer 40 contacts with the cover plate 20, and a first electrode current signal is led out;

the second electrode lug 12 is directly contacted with the upper bottom surface of the conductive layer 40 at the lower half part of the cylindrical battery, the lower bottom surface of the conductive layer 40 is contacted with the inner wall of the bottom plate of the shell 10, and a second electrode current signal is led out;

the first tab 11 draws current signals to the cover plate 20, the second tab 12 draws current signals to the shell 10, and the first tab and the second tab are in physical contact, and welding or riveting modes are not adopted, so that parts of the cylindrical battery can be reduced, the cylindrical battery can be conveniently installed and operated, and the assembly efficiency of the cylindrical battery is improved.

As shown in fig. 3, the conductive layer 40 is in a truncated cone-shaped structure, a through hole for the heat conducting core tube 30 to pass through is formed in the center of the conductive layer 40, and the diameter of the through hole is equal to that of the heat conducting core tube 30, so that the connection position between the conductive layer 40 and the heat conducting core tube 30 is more stable, and the conductive layer 40 is in a truncated cone-shaped structure, so that the current guiding effect is better.

The inside hollow structure that sets up of heat conduction core pipe 30, heat conduction core pipe 30 both ends are contradicted casing 10 and apron 20 respectively, and the in-process of charging and discharging can be derived to the one hand, and the inside heat that accumulates of core is rolled up to the other hand fixed conducting layer 40 and the relative position of utmost point ear for the position of heat conduction core pipe 30 is more stable, can make things convenient for passing heat conduction core pipe 30 in the conducting layer 40 simultaneously.

As shown in fig. 4, the portion of the first tab 11 and the second tab 12 extending from the winding core body 70 is 3mm or less, which can save foil material.

As shown in fig. 1, the conductive layer 40 on the first tab 11 is closely contacted with the cover plate 20, and the conductive layer 40 on the second tab 12 is closely contacted with the bottom end inside the housing 10, so that the cover plate 20 and the housing 10 conduct electricity, and at the same time, the conductive effect of the cover plate 20 and the housing 10 is better.

As shown in fig. 1-2, an insulating sheet 50 is disposed between the edge of the cover 20 and the inner surface of the casing 10, so that the cover 20 and the casing 10 are separated into positive and negative poles, and no short circuit phenomenon is generated between the two poles, thereby maintaining stable current transmission of the cylindrical battery.

As shown in fig. 1, the cover plate 20 and the housing 10 are fixed by rolling grooves and pressing seals at the positions of the insulating sheets 50, so that the cover plate 20 and the housing 10 can be quickly connected and fixed, the connection and fixation mode is convenient to operate, and the connection and fixation efficiency between the cover plate 20 and the housing 10 can be improved.

As shown in fig. 5-6, the cover plate 20 is provided with a liquid injection hole, and the cover plate 20 is provided with an explosion-proof valve 60 in the liquid injection hole, so that the sealing effect of the liquid injection hole is better.

As shown in fig. 1, the housing 10 is a steel or aluminum shell, and the cover plate 20 is a steel or aluminum cover.

As shown in fig. 2, the length of the heat conducting core tube 30 is longer than that of the winding core body 70, so that the positions of the two ends of the heat conducting core tube 30 in the cylindrical battery are fixed, and the position of the heat conducting core tube 30 in the cylindrical battery is more stable.

The conductive layer 40 is made of conductive adhesive or conductive foam, and has a certain compression ratio, so that the conductive layer is convenient to compress during packaging;

the winding core body 70 is a cylindrical winding core wound with a positive electrode, a separator, a negative electrode, and a separator;

placing the heat conducting core tube 30 at the middle through hole of the cylindrical winding core;

sleeving the conductive layer 40 on the first tab 11 and the second tab 12 of the cylindrical winding core respectively, and enabling the middle through hole of the conductive layer 40 to just pass through the heat conducting core tube 30;

the second lug 12 is downwards arranged in a cylindrical shell 10 with an opening at one end;

an insulating sheet 50 is added between the first tab 11 and the shell 10 to prevent the first tab 11 and the cover plate 20 from contacting the shell 10 to cause short circuit;

and then the cover plate 20 is arranged above the first electrode lug 11 and the conductive layer 40, the battery is sealed in a rolling groove sealing mode, and insulation protection is carried out between the shell 10 and the first electrode lug 11, between the conductive layer 40 and the cover plate 20 through the insulation sheet 50.

Through the size design, after sealing, the upper part of the first tab 11 is tightly contacted with the lower surface of the conductive layer 40, and meanwhile, the upper surface of the conductive layer 40 is tightly contacted with the lower surface of the cover plate 20; the lower second lug 12 is in close contact with the upper surface of the conductive layer 40, while the lower surface of the conductive layer 40 is in close contact with the inner surface of the bottom of the case 10; two ends of the middle heat conduction core tube 30 are respectively in close contact with the lower surface of the cover plate 20 and the upper surface of the bottom of the shell 10;

after the battery is baked, electrolyte is injected through the liquid injection hole on the cover plate 20, after formation, the liquid injection hole is sealed and welded by adopting an explosion-proof valve 60, and finally, corresponding detection is carried out, so that the finished cylindrical battery is obtained.

The technical scope of the present utility model is not limited to the above description, and those skilled in the art may make various changes and modifications to the above-described embodiments without departing from the technical spirit of the present utility model, and these changes and modifications should be included in the scope of the present utility model.

Claims

1. A cylindrical battery characterized in that: including casing (10), apron (20), heat conduction core pipe (30) and roll up core main part (70), the inside roll core main part (70) that are equipped with of casing (10), roll up core main part (70) center department and be hollow structure, roll up core main part (70) inside center department and be equipped with heat conduction core pipe (30), the upper cover of casing (10) has apron (20), heat conduction core pipe (30) both ends are contradicted casing (10) and apron (20) respectively.

2. A cylindrical battery according to claim 1, wherein: the winding core is characterized in that two ends of the winding core main body (70) are respectively provided with a first tab (11) and a second tab (12), and conductive layers (40) are respectively arranged on the first tab (11) and the second tab (12).

3. A cylindrical battery according to claim 2, wherein: the conductive layer (40) is in a truncated cone-shaped structure, a through hole for the heat conduction core tube (30) to pass through is formed in the center of the conductive layer (40), and the diameter of the through hole is equal to that of the heat conduction core tube (30).

4. A cylindrical battery according to claim 2, wherein: the parts of the first tab (11) and the second tab (12) extending out of the winding core main body (70) are smaller than or equal to 3mm.

5. A cylindrical battery according to claim 2, wherein: the conducting layer (40) on the first tab (11) is tightly contacted with the cover plate (20), and the conducting layer (40) on the second tab (12) is tightly contacted with the bottom end inside the shell (10).

6. A cylindrical battery according to claim 1, wherein: an insulating sheet (50) is arranged between the edge end of the cover plate (20) and the inner surface of the shell (10).

7. A cylindrical battery according to claim 6, wherein: the cover plate (20) and the shell (10) are fixed at the position of the insulating sheet (50) by rolling grooves, pressing and sealing.

8. A cylindrical battery according to claim 7, wherein: the cover plate (20) is provided with a liquid injection hole, and the cover plate (20) is provided with an explosion-proof valve (60) positioned in the liquid injection hole.

9. A cylindrical battery according to claim 1, wherein: the shell (10) adopts a steel shell or an aluminum shell, and the cover plate (20) adopts a steel cover or an aluminum cover.

10. A cylindrical battery according to claim 1, wherein: the length of the heat conduction core tube (30) is longer than that of the winding core main body (70).