CN219393497U

CN219393497U - Cylindrical battery cell, battery pack comprising same and automobile

Info

Publication number: CN219393497U
Application number: CN202223428145.0U
Authority: CN
Inventors: 李昌熙
Original assignee: LG Energy Solution Ltd
Current assignee: LG Energy Solution Ltd
Priority date: 2021-12-20
Filing date: 2022-12-19
Publication date: 2023-07-21
Anticipated expiration: 2032-12-19
Also published as: KR20230094142A

Abstract

The utility model relates to a cylindrical battery cell, a battery pack comprising the same and an automobile. The battery cell of one embodiment includes: an electrode assembly; a case having an opening portion formed on one side and a closing portion formed on the other side, the case accommodating the electrode assembly through the opening portion; a cover plate covering the opening portion; and a cooling tube passing through the winding center hole of the electrode assembly and penetrating the closing part of the case and the cap plate.

Description

Cylindrical battery cell, battery pack comprising same and automobile

Technical Field

The utility model relates to a cylindrical battery cell, a battery pack comprising the same and an automobile.

Background

Secondary batteries, which are easily applied to various product types and have electrical characteristics such as high energy density, are widely used not only for portable devices and the like but also for Electric Vehicles (EV) or hybrid vehicles (Hybrid Electric Vehicle) driven by Electric drive sources and the like. Such a secondary battery has not only a disposable advantage of remarkably reducing the use of fossil fuel, but also does not generate any by-products due to the use of energy, and thus has been attracting attention as a novel energy source that is environmentally friendly and is used to improve energy efficiency.

The types of secondary batteries currently in wide use are lithium ion batteries, lithium polymer batteries, nickel cadmium batteries, nickel hydrogen batteries, nickel zinc batteries, and the like. The operating voltage of such a unit secondary battery cell, i.e., a unit cell, is about 2.5V to 4.5V. Therefore, when a higher output voltage than this is required, a plurality of battery cells are connected in series to constitute a battery pack. In addition, a plurality of battery cells are connected in parallel according to the charge-discharge capacity required by the battery pack to form the battery pack. Therefore, the number of battery cells included in the battery pack may be variously set according to a desired output voltage or charge-discharge capacity.

On the other hand, when a plurality of battery cells are connected in series/parallel to constitute a battery pack, a battery module formed of at least one battery cell may be constructed first, and at least one such battery module may be reused and other constituent elements may be added to constitute the battery pack. Alternatively, the battery module unit may be omitted, and a plurality of additional members may be added to the cell aggregate, which is formed by electrically connecting a plurality of battery cells, to manufacture the battery pack.

Since the assembled battery is manufactured in a form in which a plurality of secondary batteries are densely gathered in a narrow space, it is important to easily radiate heat generated from the respective battery cells. The charge or discharge process of the secondary battery occurs through an electrochemical reaction, and if heat generated from the battery module during the charge or discharge process cannot be effectively removed, heat aggregation occurs, eventually the degradation of the battery module is accelerated, and fire or explosion occurs according to circumstances.

Therefore, a high-power and large-capacity battery pack must be used for a cooling device for cooling the battery cells built therein.

Existing battery packs typically use cooling components located outside of the battery cells to cool the battery cells. Such a cooling member is in contact with the case of the battery cell so that heat inside the battery cell is discharged outside through the case and the cooling member. When the cooling member located at the outside of the battery cell is thus used, the cooling efficiency may be improved in a manner of maximizing the contact area between the cooling member and the case of the battery cell. For example, a thermal conductive sheet (sheet) may be disposed between the cooling member and the case of the battery cell, or the cooling member may be formed into a shape corresponding to the shape of the case of the battery cell.

However, since the heat inside is discharged through the case of the battery cell, such a conventional cooling structure has a limitation in improving the cooling efficiency even if a liquid cooling system having a high cooling efficiency is selected.

For example, devices such as electric vehicles that require battery cells using high capacity and high output power are required to further improve the cooling performance of the battery cells. However, as the output power and capacity of the battery cells increases, the size of the battery cells increases, and thus, it is difficult to achieve the desired cooling efficiency only by the existing cooling means. Therefore, there is a need to develop a battery cell structure with further improved cooling efficiency by improving the cooling structure.

Disclosure of Invention

Technical problem

The present utility model is directed to solving the above-mentioned problems, and an object of the present utility model is to pass a cooling pipe for cooling a battery cell through the inside of the battery cell to improve the cooling efficiency of the battery cell.

In another aspect, it is an object of the present utility model to directly supply a cooling fluid to the inside of a battery cell to prevent thermal event diffusion when the temperature of the battery cell rises above a prescribed level.

However, the technical problems to be solved by the present utility model are not limited to the above-described technical problems, and other technical problems not mentioned can be clearly understood by those skilled in the art from the description of the utility model described below.

Technical proposal

The battery cell according to an embodiment of the present utility model for solving the above technical problems includes: an electrode assembly; a case having an opening portion formed on one side and a closing portion formed on the other side, the case accommodating the electrode assembly through the opening portion; a cover plate covering the opening portion; and a cooling tube passing through the winding center hole of the electrode assembly and penetrating the closing part of the case and the cap plate.

The cap plate and the case may be electrically connected with the electrode assembly, and have polarities opposite to each other.

An insulating gasket may be disposed between at least one of the cooling pipe and the cover plate and between the cooling pipe and the closing portion.

A heat-fusible portion may be formed between the insulating pad and the member adjacent thereto.

An insulating gasket may be disposed between the cooling pipe and the cover plate and between the cooling pipe and the closing portion, and a welded portion may be formed at one of the remaining positions.

An insulating layer may be provided on the outer peripheral surface of the cooling pipe at least in a region located inside the housing.

The insulating gasket may be provided with a gasket hole capable of passing the cooling pipe therethrough, and an inner diameter of the gasket hole at an inner side direction end of the housing may be larger than an inner diameter at an outer side direction end.

The cooling pipe may have a concave-convex portion on an outer peripheral surface thereof.

The cooling tube may be provided with a relatively fragile break compared to the surroundings.

The fracture may be a region of thinner thickness than the surrounding.

The fracture portion may be formed in a form of a notch formed in any one of the inner peripheral surface and the outer peripheral surface of the cooling pipe.

The rupture portion may include a tube hole cover covering tube holes formed on an outer circumferential surface of the cooling tube, and the tube hole cover may have a lower melting point than the rest of the cooling tube.

The rupture portion may be provided at least at a region of the outer circumferential surface of the cooling tube within the winding center hole of the electrode assembly.

A battery pack according to an embodiment of the present utility model for solving the above-described technical problems includes: a battery cell aggregate comprising a plurality of battery cells of the present utility model; and a connection pipe connecting a pair of cooling pipes respectively arranged in the battery cells adjacent to each other.

An automobile according to an embodiment of the present utility model for solving the above-described technical problems includes the battery pack of the present utility model.

Advantageous effects

According to one embodiment of the present utility model, a cooling pipe for cooling a battery cell can be passed through the inside of the battery cell, thereby improving the cooling efficiency of the battery cell.

According to another embodiment of the present utility model, when the temperature of the battery cell rises to a predetermined level, the coolant can be directly supplied to the inside of the battery cell, thereby preventing thermal event diffusion.

However, the advantages derived by the present utility model are not limited to the above-described effects, and other various advantages not mentioned can be clearly understood by those skilled in the art through the description of the utility model.

Drawings

The following drawings, which are attached to the specification of the present application, illustrate preferred embodiments of the present utility model, and serve to help understand the technical idea of the present utility model together with the detailed description of the utility model described below, and therefore the present utility model is not limited to the matters described in these drawings.

Fig. 1 is a diagram showing an internal structure of a battery cell according to an embodiment of the present utility model.

Fig. 2 is a view showing a state in which an insulating spacer is added to the battery cell shown in fig. 1.

Fig. 3 is a view showing a heat-fused portion formed in a region where the cooling pipe passes through the cover plate.

Fig. 4 is a view showing a heat-fused portion formed in a region where the cooling pipe passes through the closed portion of the housing.

Fig. 5 is a view showing a welded portion formed in a region where the cooling pipe passes through the cover plate.

Fig. 6 is a view showing a welded portion formed in a region where the cooling pipe passes through the closed portion of the housing.

Fig. 7 is a view showing an embodiment in which the cooling pipe is provided with an insulating layer formed on the outer peripheral surface thereof.

Fig. 8 to 10 are diagrams showing an exemplary structure of the insulating spacer of the present utility model.

Fig. 11 is a view showing an example in which the cooling tube of the present utility model includes a concave-convex portion formed on the outer peripheral surface thereof.

Fig. 12 is a view showing an example in which the cooling tube of the present utility model includes a fracture portion formed on the outer peripheral surface thereof.

Fig. 13 to 15 are views showing various forms of the fracture portion formed in the cooling pipe according to the present utility model.

Fig. 16 is a view showing an embodiment in which the rupture portion of the present utility model is located in the inner region of the winding hole of the electrode assembly.

Fig. 17 is a diagram showing a battery pack according to an embodiment of the present utility model.

Fig. 18 is a diagram showing an automobile according to an embodiment of the present utility model.

Description of the reference numerals

1: battery cell

2: connecting pipe

2a: an inlet

2b: an outlet

3: battery pack

5: automobile

10: electrode assembly

11: first tab

12: second lug

10a: winding center hole

20: outer casing

21: opening part

22: closure part

23: rolling groove part

24: hemming portion

30: cover plate

40: cooling pipe

40a: pipe hole

41: insulating layer

42: concave-convex part

43: fracture part

43a: pipe hole cover

50: sealing gasket

60: insulating gasket

60a: gasket hole

M: hot melt portion

W: welded part

Detailed Description

Hereinafter, preferred embodiments of the present utility model will be described in detail with reference to the accompanying drawings. First, terms or words used in the specification and claims of the present application should not be interpreted as limited to general or dictionary meanings, but should be interpreted as meanings and concepts conforming to technical ideas of the present utility model based on the principle that an inventor can appropriately define concepts of terms in order to explain their utility model in an optimal way. Therefore, the embodiments described in the specification of the present application and the features shown in the drawings are only the most preferable embodiments of the present utility model and not represent the whole technical ideas of the present utility model, and therefore, it should be understood that there may be various equivalents and modifications that can be substituted at the time of application.

First, referring to fig. 1, a battery cell 1 according to an embodiment of the present utility model may include an electrode assembly 10, a case 20, a cap plate 30, and a cooling tube 40. The housing 20 may include an opening 21 formed on one side and a closing 22 formed on the other side opposite thereto. The case 20 may house the electrode assembly 10 through the opening 21. The cover plate 30 can cover the opening 21 of the housing 20. The cooling tube 40 may pass through the winding center hole 10a of the electrode assembly 10. The cooling tube 40 may penetrate the closure 22 and the cover plate 30 of the housing 20.

As described above, the battery cell 1 according to the present utility model has a structure in which the cooling pipe 40 passes through the inside of the battery cell 1, thereby maximizing the cooling efficiency.

When the cooling member is brought into contact with the battery cell at the outside of the battery cell to cool, heat inside the battery cell is discharged through the case and the cooling member in order. In contrast, in the case where the cooling pipe 40 is passed through the inside of the battery cell 1 as in the present utility model, the electrolyte in the inside of the battery cell 1 can be brought into contact with the cooling pipe 40 to more directly cool the battery cell, and therefore, the cooling efficiency can be improved.

In particular, when the cooling tube 40 is passed through the winding center hole 10a of the electrode assembly 10, heat can be prevented from being concentrated at the center portion farthest from the case 20. The cooling liquid flowing through the cooling pipe 40 can be cooled while flowing through the center of the battery cell 1. In addition, the region closer to the case 20 than the center of the battery cell 1 can still discharge heat through the case 20.

The battery cell 1 may be, for example, a cylindrical battery cell. At this time, the electrode assembly 10 may be a jelly-roll type electrode assembly. The electrode assembly 10 may be in a form in which a first electrode, a second electrode, and a separator between the first electrode and the second electrode are wound in one direction. The electrode assembly 10 may be provided with a first tab 11 and a second tab 12 having polarities opposite to each other.

For example, the first electrode may be a positive electrode and the second electrode may be a negative electrode. The first electrode may include a first metal foil and a first electrode active material layer coated on one or both sides of the first metal foil. The first electrode may have a first uncoated portion where the first electrode active material is not coated. The first tab 11 may be the first uncoated portion itself, or may be an additional lead tab (lead tab) connected to the first uncoated portion.

The second electrode may include a second metal foil and a second electrode active material layer coated on one or both sides of the second metal foil. The second electrode may have a second uncoated portion that is not coated with the second electrode active material. The second tab 12 may be the second uncoated portion itself or may be an additional lead tab connected to the second uncoated portion.

The case 20 may be electrically connected with the electrode assembly 10. The case 20 may be electrically connected with the second tab 12 of the electrode assembly 10. For example, the second tab 12 may extend from the electrode assembly 10 in a direction toward the closed portion 22 of the case 20 to be directly or indirectly coupled to the inner side of the closed portion 22.

The case 20 may include a rolling groove part 23 capable of preventing the electrode assembly 10 inserted therein from flowing. The rolling groove 23 may be pressed inward by a predetermined depth along the outer circumferential surface of the housing 20. In the region where the rolling groove part 23 is formed, the inner diameter of the case 20 may be smaller than the outer diameter of the electrode assembly 10. Thereby, the movement of the electrode assembly 10 between the rolling groove portion 23 and the closing portion 22 in the case 20 can be restricted.

The housing 20 may include a beading portion (crirnping portion) 24 for securing the cover plate 30. The beading portion 24 may extend from an end of the rolling groove portion 23 and cover the outer circumferential surface of the cap plate 30, and then be bent to surround an edge of the outer lateral surface of the cap plate 30.

The cover plate 30 can cover the opening portion 21 of the housing 20 to seal the housing 20. The cap plate 30 may be electrically connected with the electrode assembly 10. The cap plate 30 may be electrically connected with the first tab 11 of the electrode assembly 10. For example, the first tab 11 may extend from the electrode assembly 10 in a direction toward the open portion of the case 20 to be directly or indirectly coupled to the inner side surface of the cap plate 30.

As described above, the cap plate 30 and the case 20 of the present utility model may be electrically connected with the electrode assembly 10, respectively, and may have polarities opposite to each other. At this time, a sealing gasket 50 may be disposed between the cover plate 30 and the inner side surface of the case 20. The sealing gasket 50 may be disposed between the cap plate 30 and the case 20 in a pressing manner. The sealing gasket 50 may have insulation. The seal gasket 50 not only prevents the cover plate 30 from directly contacting the housing 20, but also seals the opening 21 of the housing 20.

The cooling pipe 40 may have a hollow structure so that the cooling liquid can flow therein. When winding the electrode assembly 10, the winding may be performed centering on the cooling tube 40 such that the cooling tube 40 is positioned in the electrode assembly 10 and the winding center hole 10a of the electrode assembly 10 when the winding of the electrode assembly 10 is completed.

The cooling pipe 40 may include, for example, a metal material to ensure mechanical strength and heat resistance thereof. The cooling tube 40 may also be advantageous in terms of thermal conductivity when it comprises a metallic material. The cooling pipe 40 passes through the inside of the battery cell 1, and thus, can be in contact with the electrolyte located inside the battery cell 1. In this way, when the cooling tube 40 is in contact with an electrolyte, for example, in order to smoothly achieve heat exchange by the cooling liquid flowing inside the cooling tube 40, the cooling tube 40 is preferably made of a material excellent in heat conductivity.

Next, referring to fig. 2, the battery cell 1 of the present utility model may include an insulating spacer 60. The insulating gasket 60 may be disposed at least any one of between the cooling tube 40 and the cover plate 30 and between the cooling tube 40 and the closed portion 22 of the housing 20.

The insulating spacer 60 can prevent a short circuit from occurring due to the cooling tube 40 when the cooling tube 40 contains a conductive material. Furthermore, the insulating gasket 60 can prevent the sealability from being lowered at the region penetrated by the cooling pipe 40. The insulating gasket 60 may be made of substantially the same or similar materials as the sealing gasket 50 described above, for example.

Referring to fig. 3 and 4, a heat-fusible part M may be formed between the insulating mat 60 and the adjacent component. The insulating pad 60 may comprise a resin material, for example. The insulating spacer 60 may be bonded to the adjacent components by heat fusion. In this way, it is possible to prevent gaps from being generated between the insulating spacer 60 and the adjacent member by the heat fusion.

As shown in fig. 3, when the insulating gasket 60 is disposed between the cooling pipe 40 and the cover plate 30 in the region where the cooling pipe 40 penetrates the cover plate 30, the gap between the insulating gasket 60 and the cooling pipe 40 and the gap between the insulating gasket 60 and the cover plate 30 can be sealed by heat-sealing of the insulating gasket 60. Furthermore, the bonding force between the cooling pipe 40 and the cap plate 30 can be increased by such hot melting.

Similarly, as shown in fig. 4, when the insulating gasket 60 is disposed between the cooling pipe 40 and the closing portion 22 in the region where the cooling pipe 40 penetrates the closing portion 22 of the housing 20, the gap between the insulating gasket 60 and the cooling pipe 40 and the gap between the insulating gasket 60 and the closing portion 22 can be sealed by the heat fusion of the insulating gasket 60. Furthermore, the bonding force between the cooling pipe 40 and the housing 20 can be increased by such hot melting.

On the other hand, referring to fig. 5 and 6, the welded portion W may be formed in a region where the cooling pipe 40 penetrates the cover plate 30 and a region where the cooling pipe 40 penetrates the closing portion 22 of the case 20, where the insulating gasket 60 (refer to fig. 3 and 4) is not used. That is, an insulating gasket 60 (see fig. 3 and 4) may be disposed between the cooling pipe 40 and the cover plate 30 and between the cooling pipe 40 and the closing portion 22 of the housing 20, and a welded portion W may be formed at the other portion.

In this way, when the cooling pipe 40 and the member penetrating the cooling pipe 40 are welded to the penetration portion, not only the fixing force between the cooling pipe 40 and the member penetrating the cooling pipe 40 but also the sealing force can be improved.

Next, referring to fig. 7, an insulating layer 41 may be provided on the outer peripheral surface of the cooling tube 40. The insulating layer 41 may be provided at least in a region located inside the housing 20 in the outer circumferential surface of the cooling tube 40. When the cooling tube 40 is provided with the insulating layer 41 in this way, it is possible to prevent the internal short circuit from occurring in the case 20 by connecting a plurality of members having different polarities to each other through the cooling tube 40. Furthermore, the insulating layer 41 also prevents the cooling tube 40 from being corroded by the electrolyte.

Next, referring to fig. 8 to 10, the insulating gasket 60 may be provided with a gasket hole 60a through which the cooling pipe 40 can pass. The inner diameter of the packing hole 60a at the inner side direction end of the outer case 20 may be larger than the inner diameter at the outer side direction end of the outer case 20.

When the insulating spacer 60 has such a structure, not only the easiness of inserting the cooling pipe 40 from the inside to the outside of the housing 20 into the lid plate 30 and/or the closing portion 22 of the housing 20 can be maintained, but also the lowering of the sealing property can be prevented.

The battery cell 1 may be manufactured, for example, by inserting a coupled body formed by coupling the electrode assembly 10 and the cooling tube 40 into the case 20 such that one end portion of the cooling tube 40 passes through the closing portion 22 of the case 20, and then closing the opening portion 21 of the case 20 with the cap plate 30. At this time, both end portions of the cooling tube 40 pass through the closing portion 22 and the cover plate 30 of the housing 20 from the inside to the outside of the housing 20, respectively. Therefore, when the size of the gasket hole 60a of the insulating gasket 60 is formed larger on the inside of the case 20 than on the outside as described above, the manufacturing process of the battery cell 1 can be made easier.

Next, referring to fig. 11, the cooling tube 40 may have a concave-convex portion 42 on an outer peripheral surface thereof. The concave-convex portion 42 may be formed by machining the surface of the cooling pipe 40 and/or chemically etching the surface of the cooling pipe 40. The concave-convex portion 42 may include a portion protruding relatively outward from the periphery and a portion recessed relatively inward from the periphery at the surface of the cooling tube 40. The concave-convex portion 42 can enlarge the surface area of the cooling tube 40. When the surface area of the cooling pipe 40 is enlarged in this way, the heat exchange efficiency can be improved. In order to maximize heat exchange efficiency, the concave-convex portion 42 may be provided at least in a region of the outer circumferential surface of the cooling tube 40 located inside the housing 20.

The concave-convex portion 42 may be provided at least in a region where the insulating spacer 60 is inserted in the outer circumferential surface of the cooling tube 40. When the concave-convex portion 42 is formed in the region of the outer peripheral surface of the cooling pipe 40 that abuts against the inner surface of the insulating spacer 60, the sealing force at the joint portion of the cooling pipe 40 and the insulating spacer 60 when the insulating spacer 60 is heat-melted can be improved.

Referring to fig. 12, the cooling pipe 40 may be provided with a fracture 43 that is relatively fragile compared to the surroundings. The rupture portion 43 can rupture when the internal temperature of the battery cell 1 rises above a fixed level due to abnormality of the battery cell 1.

When the rupture portion 43 is ruptured due to the temperature rise of the battery cell 1, the cooling liquid flowing inside the cooling pipe 40 may be discharged to the outside of the cooling pipe 40 and supplied to the inside of the battery cell 1. By directly contacting the coolant with the plurality of components and the electrolyte inside the battery cell 1 in this way, the temperature inside the battery cell 1 can be rapidly reduced, and therefore, thermal event diffusion due to abnormality of the battery cell 1 can be prevented.

Referring to fig. 13 and 14, the rupture portion 43 may be a region having a thinner thickness than the surrounding. As described above, in the cooling pipe 40, the region having a smaller thickness than the surrounding region can be ruptured earlier due to an increase in the internal pressure and/or an increase in the temperature, and therefore the cooling liquid can be discharged through this region. For example, the rupture portion 43 may be formed by forming a notch in any one of the inner peripheral surface and the outer peripheral surface of the cooling tube 40.

Referring to fig. 15, the rupture portion 43 may include a tube hole cover 43a covering the tube holes 40a formed on the outer circumferential surface of the cooling tube 40. The orifice cover 43a may have a lower melting point than the remainder of the cooling tube 40. At this time, as the internal temperature of the battery cell 1 increases, the tube hole cover 43a portion may be ruptured earlier than the rest, thereby discharging the coolant. For example, the cooling tube 40 may be a metal material, and the tube hole cover 43a may be made of a metal material having a lower melting point than the rest.

In contrast, the portion of the cooling tube 40 other than the tube hole cover 43a may be a metal material, and the tube hole cover 43a may be a resin material. At this time, the orifice cover 43a can be broken slightly faster than the metal material.

Referring to fig. 16, the rupture 43 may be provided at least in a region within the winding center hole 10a of the electrode assembly 10 in the outer circumferential surface of the cooling tube 40. When the battery cell 1 has abnormal heat generation, the maximum amount of heat is accumulated in the core region. Therefore, when the rupture portion 43 is located at the above-described position, the cooling pipe 40 can be ruptured based on abnormal heat generation and the cooling liquid is intensively supplied to the core region, thereby effectively preventing the thermal event from being spread.

Referring to fig. 17, a battery pack 3 according to an embodiment of the present utility model may include: a battery cell aggregate including a plurality of the battery cells 1 of the present utility model described above; and a connection pipe 2 for connecting a pair of cooling pipes 40 respectively disposed in the battery cells adjacent to each other. At this time, the coolant injected through the inlet 2a may pass through the inside of the plurality of battery cells 1 through the cooling pipe 40 and the connection pipe 2 and be discharged through the outlet 2 b. The battery pack 3 of the present utility model can improve the cooling efficiency by allowing the coolant to pass through the inside of each battery cell 1 and perform heat exchange.

Referring to fig. 18, an automobile 5 according to an embodiment of the present utility model may include the battery pack 3 of the present utility model described above. The car 5 may be operated by receiving power from the battery pack 3. The vehicle 5 may be, for example, an Electric Vehicle (EV) or a Hybrid Electric Vehicle (HEV).

While the present utility model has been described with respect to the above limited embodiments and drawings, the present utility model is not limited thereto, and those skilled in the art can make various modifications and variations within the technical spirit of the present utility model and the scope of the appended claims.

Claims

1. A cylindrical battery cell, comprising:

an electrode assembly;

a case having an opening portion formed on one side and a closing portion formed on the other side, the case accommodating the electrode assembly through the opening portion;

a cover plate covering the opening portion; and

and a cooling tube passing through the winding center hole of the electrode assembly and penetrating the closing part of the case and the cap plate.

2. The cylindrical battery cell of claim 1, wherein the cylindrical battery cell comprises a plurality of cells,

the cap plate and the case are electrically connected with the electrode assembly, and have polarities opposite to each other.

3. The cylindrical battery cell of claim 2, wherein the cylindrical battery cell comprises a plurality of cells,

an insulating gasket is disposed between at least one of the cooling pipe and the cover plate and between the cooling pipe and the closing portion.

4. The cylindrical battery cell of claim 3,

a heat-fusible part is formed between the insulating gasket and the adjacent component.

5. The cylindrical battery cell of claim 2, wherein the cylindrical battery cell comprises a plurality of cells,

an insulating gasket is disposed between the cooling pipe and the cover plate and between the cooling pipe and the closing portion, and a welded portion is formed at one of the other positions.

6. The cylindrical battery cell of claim 1, wherein the cylindrical battery cell comprises a plurality of cells,

an insulating layer is provided on the outer peripheral surface of the cooling tube at least in a region located inside the housing.

7. The cylindrical battery cell of claim 3,

the insulating gasket is provided with a gasket hole through which the cooling pipe can pass,

an inner diameter of the gasket hole at an inner side direction end of the housing is larger than an inner diameter at an outer side direction end.

8. The cylindrical battery cell of claim 1, wherein the cylindrical battery cell comprises a plurality of cells,

the cooling pipe has a concave-convex portion on its outer peripheral surface.

9. The cylindrical battery cell of claim 1, wherein the cylindrical battery cell comprises a plurality of cells,

the cooling tube has a fracture portion that is relatively fragile from the surroundings.

10. The cylindrical battery cell of claim 9, wherein the cylindrical battery cell comprises a plurality of cells,

the fracture is a region of thinner thickness than the surrounding.

11. The battery cell of claim 10, wherein the battery cell comprises a plurality of cells,

the fracture part is in a form of opening a notch at any one of the inner peripheral surface and the outer peripheral surface of the cooling pipe.

12. The cylindrical battery cell of claim 9, wherein the cylindrical battery cell comprises a plurality of cells,

the rupture portion includes a tube hole cover covering tube holes formed on an outer peripheral surface of the cooling tube,

the tube bore cover has a melting point that is lower than the melting point of the remainder of the cooling tube.

13. The cylindrical battery cell of claim 9, wherein the cylindrical battery cell comprises a plurality of cells,

the rupture portion is provided at least in a region of the outer circumferential surface of the cooling tube within the winding center hole of the electrode assembly.

14. A battery pack, comprising:

a battery cell assembly comprising a plurality of battery cells as claimed in any one of claims 1 to 13; and

and a connection pipe connecting the pair of cooling pipes respectively arranged on the adjacent battery cells.

15. An automobile, comprising:

the battery pack of claim 14.