Cylindrical battery and electric equipment

Abstract

The utility model discloses a cylindrical battery and electric equipment. The cylindrical battery comprises a shell, a battery cover and a battery cover, the battery cell is accommodated in the shell; the current collecting component is electrically connected with the battery cell and is arranged between the shell and the end surface of the battery cell; and the cooling component is arranged in contact with the flow collecting component, the cooling component is provided with an inner cavity, and a cooling medium is contained in the inner cavity. The cooling component is arranged to fully dissipate heat of the first collector plate and the second collector plate in the cylindrical battery, so that the performance stability and reliability of the cylindrical battery are ensured, the service life of the cylindrical battery is prolonged, and the safety performance of the cylindrical battery is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a cylindrical battery and electrical equipment. Background Art

[0002] As a new type of secondary battery, lithium-ion secondary battery has the advantages of high energy density, high capacity, light weight, small size, long cycle life and environmental protection, and has broad application prospects.

[0003] But correspondingly, due to the high energy density of cylindrical batteries, the demand for heat dissipation performance is higher. In order to improve the heat dissipation effect of cylindrical batteries, most of the current cylindrical batteries are equipped with cooling components, such as the patent with application number 202223428145.0, entitled Cylindrical Battery Cell and Battery Pack and Automobile Including the Same, which improves the heat dissipation effect of cylindrical batteries by setting cooling pipes in the battery core. The aforementioned solution only takes away the heat in the battery core, while most of the heat is generated outside the battery core. Therefore, the heat dissipation of the cylindrical battery is still not sufficient, which affects the reliability and life of the cylindrical battery, and further affects the safety performance of the battery. Utility Model Content

[0004] In view of the deficiencies of the prior art, the utility model provides a cylindrical battery and an electrical device to solve the problem of poor heat dissipation effect of cylindrical batteries in the prior art.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A cylindrical battery, comprising:

[0007] case;

[0008] A battery cell, accommodated in the housing;

[0009] A current collecting member, electrically connected to the battery cell and disposed between the housing and an end face of the battery cell;

[0010] The cooling member is arranged in contact with the current collecting member, and the cooling member has an inner cavity in which a cooling medium is contained.

[0011] Optionally, the current collecting member includes a first current collecting plate and a second current collecting plate;

[0012] The cooling member comprises a first cooling member and a second cooling member with inner cavities connected to each other;

[0013] The first cooling member is attached to a side of the first current collecting disk away from the battery core, and the second cooling member is attached to a side of the second current collecting disk away from the battery core.

[0014] Optionally, the first current collecting disc and the second current collecting disc are mounted on the same end of the battery core, and the first cooling member and the second cooling member are an integrated structure.

[0015] Optionally, along the height direction of the battery core, the battery core has a penetrating center hole, and a cooling channel is installed in the center hole; one end of the cooling channel is connected to the cooling component, and the cooling channel and the inner cavity of the cooling component are in communication.

[0016] Optionally, the other end of the cooling channel is closed.

[0017] Optionally, the shell has a first through hole, and the other end of the cooling channel extends to the outside of the shell through the first through hole.

[0018] Optionally, the first current collecting disk is installed at one end of the battery core, and the second current collecting disk is installed at the other end of the battery core; the first cooling component and the second cooling component are connected through the cooling channel.

[0019] Optionally, along the height direction of the battery core, the battery core has a penetrating central hole, and the cooling channel is installed in the central hole;

[0020] One end of the cooling channel is connected to the first cooling member, and the cooling channel is in communication with the inner cavity of the first cooling member;

[0021] The other end of the cooling member is connected to the second cooling member, and the cooling channel is in communication with the inner cavity of the second cooling member.

[0022] Optionally, the cooling member is provided with a cooling medium inlet and a cooling medium outlet;

[0023] Along the height direction of the battery core, a projection of one of the cooling medium inlet and the cooling medium outlet falls on the first current collecting disk, and a projection of the other of the cooling medium inlet and the cooling medium outlet falls on the second current collecting disk.

[0024] Optionally, there are multiple cooling medium inlets and / or cooling medium outlets.

[0025] Optionally, a plurality of fins are provided on the inner cavity of the cooling component and / or the inner wall of the cooling channel, so that guide grooves are formed between adjacent fins; and the fins are arranged along the flow direction of the cooling medium.

[0026] Optionally, the shell is provided with a second through hole, and the cooling member extends to the outside of the shell through the second through hole.

[0027] The utility model also provides an electrical device, comprising any of the above-mentioned cylindrical batteries.

[0028] Compared with the prior art, the utility model has the following beneficial effects:

[0029] The utility model provides a cylindrical battery and electrical equipment, which achieves sufficient heat dissipation of a current collecting component by arranging a cooling component, thereby ensuring the performance stability and reliability of the cylindrical battery, extending the service life of the cylindrical battery, and improving the safety performance of the cylindrical battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0031] Figure 1 A cross-sectional view of a cylindrical battery provided by the utility model;

[0032] Figure 2 Another cross-sectional view of a cylindrical battery provided by the utility model;

[0033] Figure 3 for Figure 2 Schematic diagram of the structure of a cylindrical battery from the perspective of one end.

[0034] In the above figure: 10, shell; 11, battery cell; 12, sealing pin; 121, liquid filling port; 21, first current collecting plate; 23, positive electrode ear; 31, second current collecting plate; 33, negative electrode ear; 401, first cooling member; 402, second cooling member; 403, cooling channel; 41, cooling medium inlet; 42, cooling medium outlet. DETAILED DESCRIPTION

[0035] In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the embodiment described below is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] In the description of the present utility model, it is to be understood that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a centrally arranged component at the same time. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a centrally arranged component at the same time.

[0037] In addition, terms such as "long", "short", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings and are only used to facilitate the description of the present invention. They do not indicate or imply that the device or component referred to must have this specific direction or operate with a specific direction structure, and should not be understood as a limitation of the present invention.

[0038] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0039] Please refer to Figures 1 to 3 The utility model provides a cooling component applied to a cylindrical battery. By setting the cooling component, sufficient heat dissipation of the cylindrical battery is achieved, thereby ensuring the performance stability and reliability of the cylindrical battery, extending the service life of the cylindrical battery, and improving the safety performance of the cylindrical battery.

[0040] Cylindrical batteries include:

[0041] Housing 10;

[0042] The battery cell 11 is accommodated in the housing 10;

[0043] A current collecting member, electrically connected to the battery cell 11 and disposed between the housing 10 and an end surface of the battery cell 11;

[0044] The cooling component is arranged in contact with the current collecting component, and has an inner cavity in which a cooling medium is contained.

[0045] It can be understood that a cylindrical battery generally includes a positive electrode assembly and a negative electrode assembly. In the present embodiment, the positive electrode assembly includes a positive electrode ear 23 and a first current collecting plate 21, and the negative electrode assembly includes a negative electrode ear 33 and a second current collecting plate 31. The first current collecting plate 21 and the second current collecting plate 31 constitute the aforementioned current collecting component. It should be noted that the current collecting component may also include other structures.

[0046] It is understandable that the housing 10 may include an outer shell and a cover plate disposed at at least one end of the outer shell. The outer shell has at least one opening, and the at least one cover plate is used to seal the at least one opening.

[0047] In addition, the housing 10 is formed with a liquid injection port 121 for injecting electrolyte, and a sealing pin 12 for sealing is provided in the liquid injection port 121 .

[0048] The cooling member may be a hollow structure for storing or circulating cooling medium. The material of the cooling member is selected according to the needs, and it should be ensured that the battery will not be short-circuited, that is, the positive and negative electrodes of the battery will not be electrically connected through the cooling member. Generally speaking, the cooling member is set to an insulating material, such as plastic, and is insulated from the current collecting member. The inner cavity of the cooling member can be a guide channel to guide the cooling medium to flow according to a set trajectory at different positions in the inner cavity of the cooling member, or it may not have a guide function. It is sufficient to ensure that the cooling medium flows through the position in contact with the current collecting member as much as possible.

[0049] The contact arrangement between the cooling member and the current collecting member refers to the physical contact between the two, so that heat can be transferred between the cooling member, the current collecting member and the cooling medium. Since the heat generated at the connection between the current collecting member and the pole lug and the pole is transferred to the cooling medium through the current collecting member, and since the cooling medium maintains a low temperature, the current collecting member will also maintain a low temperature, thereby cooling the connection between the current collecting member and the pole lug and the pole.

[0050] The cooling member includes a first cooling member 401 and a second cooling member 402 whose inner cavities are interconnected;

[0051] The first cooling member 401 is attached to the side of the first current collecting disk 21 away from the battery cell 11, and the second cooling member 402 is attached to the side of the second current collecting disk 31 away from the battery cell 11. Based on this, the first cooling member 401 can dissipate the heat generated in the first current collecting disk 21, and the second cooling member 402 can dissipate the heat generated in the second current collecting disk 31. Since the cooling member and the current collecting disk are in direct contact and the contact area is large, the cooling efficiency and cooling effect are good.

[0052] Embodiment 1

[0053] Please refer to Figure 1 In the present embodiment, the battery cell 11 adopts a battery cell structure with positive and negative pole ears on the same side. Correspondingly, the first current collecting disk 21 and the second current collecting disk 31 are installed at the same end of the battery cell 11, the first current collecting disk 21 is electrically connected to one of the pole ears, and the second current collecting disk 31 is electrically connected to the other pole ear. At this time, the first cooling member 401 and the second cooling member 402 are an integrated structure.

[0054] It is understood that the integrated structure means that the first cooling member 401 and the second cooling member 402 are formed in one piece and share a common inner cavity. The integrated structure can shorten the heat dissipation path and ensure the consistency of the heat dissipation effect of the first cooling member 401 and the second cooling member 402.

[0055] The battery core 11 has a central hole extending therethrough along its height direction, in which a cooling channel 403 is installed. One end of the cooling channel 403 is connected to a cooling member, and the cooling channel 403 is in communication with an inner cavity of the cooling member.

[0056] By providing the cooling channel 403, a cooling medium (such as water or coolant) can flow through the central hole of the battery cell 11, thereby taking away the heat generated in the center of the battery cell and dissipating it to the external environment, thereby effectively reducing the temperature of the battery cell. Based on this, the heat dissipation capacity of the battery cell is enhanced, and the temperature of the battery cell can be controlled within a lower range, thereby improving the stability and reliability of the battery cell.

[0057] In addition, the cooling channel 403 can also balance the uneven temperature distribution inside the battery cell. During the charging and discharging process, the temperature distribution inside the battery cell may be uneven, which may cause local overheating and capacity decay of the battery cell. By setting the cooling channel 403, the cooling medium circulates inside the battery cell to evenly disperse and remove the heat, thereby balancing the temperature distribution inside the battery cell and improving the life and performance stability of the battery cell.

[0058] In one implementation of this embodiment, the other end of the cooling channel 403 is closed. At this time, the cooling channel 403 is inserted into the battery cell 11, which can not only cool the battery cell 11 from the inside of the battery cell, but also serve as a support tube to support the battery cell.

[0059] In another implementation of this embodiment, the shell 10 has a first through hole, and the other end of the cooling channel 403 extends to the outside of the shell 10 through the first through hole; based on this, if the end of the cooling channel extending out of the first through hole has an opening, the cooling channel can serve as the inlet and outlet of the cooling medium; if the end of the cooling channel extending out of the first through hole is a closed end, after extending outside the shell, it can be used to contact a cooling device outside the battery, such as a cooling plate at the module level, to dissipate heat.

[0060] In another implementation of this embodiment, the cooling channel 403 is disposed between the battery core 11 and the inner wall of the housing 10 and is communicated with the inner cavity of the cooling component.

[0061] It is understandable that the cooling channel 403 is arranged around the battery cell 11 and is connected to both the first cooling member 401 and the second cooling member 402. The cooling channel 403 is arranged around the battery cell 11, which increases the contact surface between the cooling channel 403 and the battery cell 11 and improves the cooling effect.

[0062] Embodiment 2

[0063] Please refer to Figure 2 , Figure 3In this embodiment, the battery cell 11 adopts a battery cell structure with positive and negative pole ears at both ends. Correspondingly, the first collecting plate 21 is installed at one end of the battery cell 11, and the second collecting plate 31 is installed at the other end of the battery cell 11; the first cooling member 401 is connected to the second cooling member 402 through a cooling channel 403.

[0064] Furthermore, along the height direction of the battery core 11, the battery core 11 has a central hole penetrating therethrough, and the cooling channel 403 is installed in the central hole;

[0065] One end of the cooling channel 403 is connected to the first cooling component 401, and the cooling channel 403 is in communication with the inner cavity of the first cooling component 401;

[0066] The other end of the cooling member is connected to the second cooling member 402 , and the cooling channel 403 is in communication with the inner cavity of the second cooling member 402 .

[0067] The cooling channel 403 connects the first cooling member 401 and the second cooling member 402, so that the cooling channel can penetrate the entire height of the battery cell 11, thereby allowing the cooling medium to fully cover the entire surface of the battery cell, thereby improving the cooling efficiency. At the same time, the cooling channel 403 is located in the center hole of the battery cell 11, and by communicating with the inner cavities of the first cooling member 401 and the second cooling member 402, the cooling medium can better enter the interior of the battery cell, thereby enhancing the internal cooling effect.

[0068] In another implementation of this embodiment, the cooling channel 403 is arranged between the battery cell 11 and the inner wall of the shell 10, and is connected to the inner cavity of the cooling component; it can be understood that at this time, the cooling channel 403 is arranged around the battery cell 11, and is connected to both the first cooling component 401 and the second cooling component 402.

[0069] By arranging the cooling channel 403 between the battery cell 11 and the inner wall of the shell 10, the cooling channel 403 is arranged around the battery cell 11 and is connected to the first cooling member 401 and the second cooling member 402, a uniform cooling layer can be formed on the surface of the battery cell, the heat dissipation efficiency is improved, and the thermal runaway problem caused by uneven temperature is avoided. At the same time, since the cooling channel 403 is arranged between the battery cell and the shell, the cooling medium can be in closer contact with the surface of the battery cell, quickly absorbing the heat released by the battery cell 11, thereby enhancing the cooling effect. In addition, this arrangement can also make full use of the space between the battery cell and the shell, and will not occupy additional space of the entire battery pack.

[0070] In this embodiment, the outer wall of the first cooling member 401 is disposed close to the first current collecting plate 21, and the outer wall of the second cooling member 402 is disposed close to the second current collecting plate 31, and heat transfer through the outer wall is used to remove heat from the first current collecting plate 21 and the second current collecting plate 31.

[0071] Embodiment 3

[0072] Based on the above-mentioned embodiments, in this embodiment, the cooling component is provided with a cooling medium inlet 41 and a cooling medium outlet 42 .

[0073] The cooling medium inlet 41 is used for allowing the flowing cooling medium to flow into the inner cavity of the cooling component, and the cooling medium outlet 42 is used for allowing the flowing cooling medium to flow out of the inner cavity of the cooling component. The cooling medium inlet 41 and the cooling medium outlet 42 are connected to a fluid pipeline located outside the battery. After the cooling medium flows out of the cooling component, the cooling medium naturally cools down and then flows into the inner cavity of the cooling component, or the cooling medium cools down by other auxiliary means and then flows into the inner cavity of the cooling component.

[0074] Through the above technical solution, by keeping the cooling medium in a flowing state and continuously flowing into and out of the cooling component, the temperature difference between the cooling medium and the current collecting component will always exist, the heat exchange rate will not decrease, and the cooling effect of the current collecting component by the flowing cooling medium will be better.

[0075] In one implementation manner of this embodiment, the cooling component is not provided with a cooling medium inlet, and the cooling medium in the inner cavity of the cooling component is kept at a relatively low temperature by other feasible means.

[0076] Specifically, the cooling medium is water, oil or other existing cooling media.

[0077] In this embodiment, along the height direction of the battery cell 11 , the projection of one of the cooling medium inlet 41 and the cooling medium outlet 42 falls on the first current collecting plate 21 , and the projection of the other of the cooling medium inlet 41 and the cooling medium outlet 42 falls on the second current collecting plate 31 .

[0078] It is understandable that if Figure 1 As shown, when the first collecting plate 21 and the second collecting plate 31 are installed at the same end of the battery cell 11, the cooling medium inlet 41 and the cooling medium outlet 42 are located at the same end of the battery cell 11 and are located on different collecting plates. At this time, the first cooling member 401 and the second cooling member 402 of the cooling member are connected to the same cooling medium inlet 41 and the same cooling medium outlet 42.

[0079] like Figure 2 As shown, when the first current collecting plate 21 is installed at one end of the battery cell 11 and the second current collecting plate 31 is installed at the other end of the battery cell 11 , the cooling medium inlet 41 and the cooling medium outlet 42 are respectively distributed at the two ends of the battery cell 11 .

[0080] Based on the above structure, the cooling medium is able to enter the first cooling component 401 and transfer its cooling effect to the component; after passing through the first cooling component 401, it then flows into the second cooling component 402 for further cooling, so that heat transfer and transmission can be achieved between the first cooling component 401 and the second cooling component 402, thereby effectively improving the overall cooling effect, making the heat transfer efficiency of the cooling medium between different components higher, thereby better reducing the temperature of the battery cell 11.

[0081] In addition, sharing a set of cooling medium inlet 41 and cooling medium outlet 42 can reduce the amount of cooling medium used, avoiding the need to use another set of cooling medium, thereby reducing maintenance and management costs.

[0082] There are multiple cooling medium inlets 41 and / or cooling medium outlets 42. By providing multiple cooling medium inlets 41 and / or cooling medium outlets 42, it is beneficial to achieve intensive inflow and outflow of the cooling medium, and to balance the temperature difference at various locations in the battery cell 11 to a greater extent, which is beneficial to reduce the thermal stress and thermal expansion caused by the temperature difference, and effectively reduce the risk of deformation of the battery cell.

[0083] In another implementation of this embodiment, the first cooling component 401 and / or the second cooling component 402 and the cooling channel 403 may be provided with different cooling medium inlets 41 and cooling medium outlets 42 respectively.

[0084] Taking the structure in which the first current collecting disk 21 and the second current collecting disk 31 are installed at the same end of the battery cell 11 and one end of the cooling channel 403 is connected to the cooling component as an example, a set of cooling medium inlet 41 and cooling medium outlet 42 are provided on the first cooling component 401 corresponding to the first current collecting disk 21, a set of cooling medium inlet 41 and cooling medium outlet 42 are provided on the second cooling component 402 corresponding to the second current collecting disk 31, and a set of cooling medium inlet 41 and cooling medium outlet 42 are provided on the cooling channel 403 corresponding to the battery cell 11, so that the flow rate, temperature, pressure and other parameters of the cooling medium passing through the first current collecting disk 21, the second current collecting disk 31 and the battery cell 11 can be independently adjusted as needed, thereby achieving precise control of the cooling requirements at different positions.

[0085] Alternatively, the first cooling member 401 , the second cooling member 402 and the cooling channel 403 are connected to the same cooling medium inlet 41 and the same cooling medium outlet 42 .

[0086] Taking the structure in which the first current collecting disk 21 and the second current collecting disk 31 are installed at different ends of the battery cell 11 and the cooling channel 403 is located between the first cooling member 401 and the second cooling member 402 as an example, the first cooling member 401, the second cooling member 402 and the cooling channel 403 share a set of cooling medium inlet 41 and cooling medium outlet 42, for example, the cooling medium inlet 41 is located on the first cooling member 401, and the cooling medium outlet 42 is located on the second cooling member 402, so that the cooling medium can flow out from the cooling medium outlet 42 after passing through the first cooling member 401, the cooling channel 403 and the second cooling member 402 in sequence. The first cooling member 401, the second cooling member 402 and the cooling channel 403 share a set of cooling medium inlet 41 and cooling medium outlet 42, which can reduce the amount of cooling medium used, avoid the need to use another set of cooling medium, and thus reduce maintenance and management costs.

[0087] Based on the aforementioned embodiments, in this embodiment, a plurality of fins are provided on the inner wall of the inner cavity of the cooling component and / or the cooling channel 403 so that guide grooves are formed between adjacent fins; the fins are arranged along the flow direction of the cooling medium.

[0088] It can be understood that the provision of fins not only increases the effective heat dissipation surface area during the heat dissipation process, but also can form an accelerating effect on the cooling medium, thereby effectively increasing the rate of heat exchange and further making the heat dissipation effect more sufficient.

[0089] Based on the above embodiments, in this embodiment, the cooling member extends outside the housing 10 through the second through hole. Based on this, when the cooling member extends outside the housing 10, it can contact with a cooling device such as a module-level cooling plate outside the battery to dissipate heat.

[0090] Based on the aforementioned embodiments, in the present embodiment, the orthographic projection of the outer wall of the first cooling component 401 on the plane where the first current collecting disk 21 is located covers the first current collecting disk 21, and the orthographic projection of the outer wall of the second cooling component 402 on the plane where the second current collecting disk 31 is located covers the second current collecting disk 31, that is, each area of ​​the first current collecting disk 21 and the second current collecting disk 31 can dissipate heat through the outer wall, which is beneficial to ensure the temperature balance of each area in the first current collecting disk 21 and the second current collecting disk 31.

[0091] Based on the aforementioned embodiments, the utility model further provides an electrical device, comprising the above cylindrical battery.

[0092] As described above, the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A cylindrical battery, characterized in that: include: Housing (10); A battery cell (11) is accommodated in the housing (10); A current collecting component, electrically connected to the battery core (11) and arranged between the housing (10) and an end surface of the battery core (11); The cooling member is arranged in contact with the current collecting member, and the cooling member has an inner cavity in which a cooling medium is contained.

2. The cylindrical battery according to claim 1, characterized in that: The current collecting component comprises a first current collecting plate (21) and a second current collecting plate (31); The cooling component comprises a first cooling component (401) and a second cooling component (402) whose inner cavities are interconnected; The first cooling member (401) is attached to a side of the first current collecting plate (21) away from the battery cell (11), and the second cooling member (402) is attached to a side of the second current collecting plate (31) away from the battery cell (11).

3. The cylindrical battery according to claim 2, characterized in that: The first current collecting disc (21) and the second current collecting disc (31) are installed at the same end of the battery core (11), and the first cooling component (401) and the second cooling component (402) are an integrated structure.

4. The cylindrical battery according to claim 3, characterized in that: Along the height direction of the battery core (11), the battery core (11) has a central hole extending therethrough, and a cooling channel (403) is installed in the central hole; one end of the cooling channel (403) is connected to the cooling component, and the cooling channel (403) is in communication with the inner cavity of the cooling component.

5. The cylindrical battery according to claim 4, characterized in that: The other end of the cooling channel (403) is closed.

6. The cylindrical battery according to claim 4, characterized in that: The housing (10) has a first through hole, and the other end of the cooling channel (403) extends to the outside of the housing (10) through the first through hole.

7. The cylindrical battery according to claim 4, characterized in that: The first current collecting disk (21) is installed at one end of the battery core (11), and the second current collecting disk (31) is installed at the other end of the battery core (11); the first cooling component (401) and the second cooling component (402) are connected via the cooling channel (403).

8. The cylindrical battery according to claim 7, characterized in that: Along the height direction of the battery core (11), the battery core (11) has a penetrating central hole, and the cooling channel (403) is installed in the central hole; One end of the cooling channel (403) is connected to the first cooling component (401), and the cooling channel (403) is in communication with the inner cavity of the first cooling component (401); The other end of the cooling channel (403) is connected to the second cooling component (402), and the cooling channel (403) and the inner cavity of the second cooling component (402) are in communication.

9. The cylindrical battery according to any one of claims 4 to 8, characterized in that: The cooling component is provided with a cooling medium inlet (41) and a cooling medium outlet (42); Along the height direction of the battery core (11), a projection of one of the cooling medium inlet (41) and the cooling medium outlet (42) falls on the first current collecting disk (21), and a projection of the other of the cooling medium inlet (41) and the cooling medium outlet (42) falls on the second current collecting disk (31).

10. The cylindrical battery according to claim 9, characterized in that: The number of the cooling medium inlet (41) and / or the cooling medium outlet (42) is plural.

11. The cylindrical battery according to claim 9, characterized in that: The inner cavity of the cooling component and / or the inner wall of the cooling channel (403) are provided with a plurality of fins, so that guide grooves are formed between adjacent fins; the fins are arranged along the flow direction of the cooling medium.

12. The cylindrical battery according to claim 1, characterized in that: The housing (10) is provided with a second through hole, and the cooling member extends to the outside of the housing (10) through the second through hole.

13. An electrical equipment, characterized in that: It comprises a cylindrical battery as described in any one of claims 1-12.

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