Battery cell convenient for replacing core package

Abstract

The utility model relates to a battery core convenient for replacing a core bag. Relates to the technical field of new energy batteries. A cavity is formed in the shell assembly, an opening is formed in the bottom of the cavity, the core bag is loaded in the cavity, the bottom cover plate is used for sealing the opening in the bottom of the cavity, a pole assembly is arranged on the top of the shell assembly, and a tab of the core bag is provided with a fluid passing body. And the flow passing body is in contact with the pole assembly and is used for conducting the pole lugs of the core package and the pole assembly. The tearing line is arranged at the joint of the bottom cover plate and the shell assembly, and the bottom cover plate can be separated from the shell assembly by tearing the tearing line, so that the bottom cover plate can be detached from the shell assembly, the bottom opening of the cavity is opened, and the core package loaded in the cavity can be taken out from the bottom opening of the cavity; therefore, the core package is simple and convenient to replace and easy to implement, and when the battery cells have problems in batch, the waste of resources is reduced by replacing the core package.

Description

Technical Field

[0001] This utility model relates to the field of new energy battery technology, and in particular to a battery cell that is easy to replace. Background Technology

[0002] A battery cell is the most basic component of a battery, typically an electrochemical device encapsulated in a metal casing. It is the unit that stores and releases electrical energy, converting chemical energy into electrical energy through a chemical reaction. A typical battery cell consists of a casing, core package, adapter plates, and a top cover.

[0003] Currently, the assembly process for battery cells typically involves connecting the tabs of the cell pack to the terminals on the top cover via adapter plates, thus establishing electrical conductivity between the tabs and terminals. The cell pack is then placed inside the housing, and finally, the top cover is fixedly connected to the housing to seal it. The exposed terminals on the top cover allow the tabs of the cell pack, which are enclosed in the housing, to be led out, enabling the battery to charge and discharge.

[0004] This method typically requires laser welding to fix the adapter plate to the tab of the cell pack and to the terminal post on the top cover during cell assembly. This makes it difficult to separate the cell pack from the top cover. As a result, when a batch of cells have problems, it is impossible to effectively deal with them by replacing the cell pack, leading to a large number of scrapped cells and a significant waste of resources. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of the prior art by providing a battery cell with an easy-to-replace core pack, making core pack replacement simple, convenient, and easy to implement, thereby reducing resource waste when battery cells experience batch problems by replacing the core pack.

[0006] This utility model proposes a battery cell that facilitates core pack replacement, comprising a housing assembly with an internal cavity and an open bottom, a core pack loaded in the cavity, and a bottom cover plate that closes the bottom opening of the cavity. The housing assembly has a terminal post assembly on its top, and a fluid is provided on the tab of the core pack. The fluid contacts the terminal post assembly to conduct electricity between the tab of the core pack and the terminal post assembly. A tear line is provided at the connection between the bottom cover plate and the housing assembly to separate the bottom cover plate from the housing assembly.

[0007] Furthermore, the housing assembly includes a housing body and a top cover plate, the top cover plate and the housing body are integrally formed, and the pole assembly is fixedly mounted on the top cover plate.

[0008] Furthermore, the housing assembly also includes an explosion-proof valve disposed on the top cover plate, the explosion-proof valve being used to provide explosion-proof protection for the core package.

[0009] Furthermore, the fluid is an elastic element, and when the core is loaded in the cavity, the fluid abuts against and is compressed by the pole assembly.

[0010] Furthermore, the electrode assembly includes a positive electrode and a negative electrode arranged at an interval on the top cover plate, and the fluid includes a positive electrode guide plate that connects the positive electrode tab of the core package to the positive electrode, and a negative electrode guide plate that connects the negative electrode tab of the core package to the negative electrode.

[0011] Furthermore, the fluid also includes a first guide spring connecting the positive electrode guide plate to the positive electrode tab of the core package, and a second guide spring connecting the negative electrode guide plate to the negative electrode tab of the core package.

[0012] Furthermore, the first guide spring consists of multiple springs that connect the positive guide disk to the positive electrode tab of the core package, and the second guide spring consists of multiple springs that connect the negative guide disk to the negative electrode tab of the core package.

[0013] Furthermore, the side end of the core package is provided with an arc-shaped guide portion, and the side wall of the housing assembly is provided with an arc-shaped guide groove that cooperates with the arc-shaped guide portion.

[0014] Furthermore, the arc-shaped guide portion consists of two parts respectively located on both sides of the core package, and the arc-shaped guide groove consists of two parts respectively located on opposite side walls of the housing assembly, with the two arc-shaped guide grooves respectively cooperating with the two arc-shaped guide portions.

[0015] The battery cell proposed in this utility model, which facilitates the replacement of the core pack, has the following beneficial effects:

[0016] (1) A disconnecting line is pre-embedded at the connection between the bottom cover plate of this cell and the housing assembly. The bottom cover plate can be separated from the housing assembly by tearing the disconnecting line. Therefore, the bottom cover plate can be removed from the housing assembly, and the bottom opening of the cavity can be opened so that the core pack loaded in the cavity can be taken out from the bottom opening of the cavity. This makes the replacement of the core pack simple, convenient and easy to implement. In turn, when problems occur in batches of cells, the waste of resources can be reduced by replacing the core pack.

[0017] (2) The electrode assembly of this battery cell is fixedly installed on the top cover plate. When the battery cell is loaded in the cavity, the fluid fixedly installed on the electrode tab of the battery cell contacts the electrode assembly on the top cover plate, thereby connecting the electrode tab of the battery cell with the electrode assembly through the fluid, and then discharging the electrode tab of the battery cell through the electrode assembly to realize the charging and discharging function of the battery cell.

[0018] (3) The fluid of this cell is set as an elastic element. When the core pack is loaded into the cavity from the bottom opening of the cavity, the fluid is compressed by squeezing. Then, the bottom opening of the cavity is closed by connecting the bottom cover plate to the main body of the housing. Thus, the core pack is limited in the cavity by the bottom cover plate, so that the fluid is kept in a compressed state, thereby ensuring the contact effect between the fluid and the terminal assembly and enhancing the flow capacity of the fluid.

[0019] (4) The current flow of this cell also includes a first current-guiding spring and a second current-guiding spring. Through the first current-guiding spring and the second current-guiding spring, the positive current-guiding plate is in close contact with the positive terminal on the top cover plate, and the negative current-guiding plate is in close contact with the negative terminal on the top cover plate, thereby ensuring the contact effect between the current flow and the terminal assembly and enhancing the current flow capacity of the current flow.

[0020] (5) The first and second current-guiding springs of this battery cell are provided in multiple ways. Through multiple first current-guiding springs, the positive current-guiding disk is in close contact with the positive terminal on the top cover plate; through multiple second current-guiding springs, the negative current-guiding disk is in close contact with the negative terminal on the top cover plate, further ensuring the contact effect between the current-guiding fluid and the terminal assembly and enhancing the current-guiding fluid's current-guiding capacity.

[0021] (6) Both sides of the core pack of this cell are provided with arc-shaped guide parts, and both sides of the opposite side walls of the housing assembly are provided with arc-shaped guide grooves. When the core pack is loaded in the cavity of the housing body, the two arc-shaped guide parts are respectively inserted and matched with the two arc-shaped guide grooves to enhance the stability of the core pack loaded in the cavity, thereby enhancing the stability of the structure of this cell. Attached Figure Description

[0022] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention. In these drawings, similar reference numerals are used to denote similar elements.

[0023] Figure 1 This is an exploded view of the assembly of a battery cell that facilitates the replacement of the core pack, according to an embodiment of the present invention.

[0024] Figure 2 This is a schematic diagram of the structure of a battery cell electrode assembly that facilitates cell pack replacement, arranged on the top of the housing assembly according to an embodiment of the present invention.

[0025] Figure 3 This is a partial structural diagram of the housing body of a battery cell that facilitates core pack replacement, according to an embodiment of the present utility model.

[0026] Figure 4 This is a schematic diagram of the structure of a battery cell with a fluid flow path disposed on the core pack, which facilitates core pack replacement, according to an embodiment of the present invention.

[0027] Figure 5 This is a partial structural diagram of a battery cell with a fluid flow path disposed on the cell pack, which facilitates cell pack replacement according to an embodiment of the present invention.

[0028] In the diagram: 1. Shell assembly; 11. Shell body; 111. Cavity; 112. Arc-shaped guide groove; 12. Top cover plate; 13. Explosion-proof valve; 2. Core package; 21. Positive electrode tab; 22. Negative electrode tab; 23. Arc-shaped guide section; 3. Bottom cover plate; 4. Pole post assembly; 41. Positive electrode post; 42. Negative electrode post; 5. Fluid flow; 51. Positive electrode guide plate; 52. Negative electrode guide plate; 53. First guide spring; 54. Second guide spring. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0030] Please see Figures 1-5 An embodiment of the present invention provides a battery cell that facilitates core pack replacement, comprising a housing assembly 1 having an internal cavity 111 with an opening at the bottom of the cavity 111, a core pack 2 loaded in the cavity 111, and a bottom cover plate 3 that closes the bottom opening of the cavity 111. A terminal post assembly 4 is provided on the top of the housing assembly 1, and a fluid 5 is provided on the tab of the core pack 2. The fluid 5 contacts the terminal post assembly 4 to conduct electricity between the tab of the core pack 2 and the terminal post assembly 4. A tear line is provided at the connection between the bottom cover plate 3 and the housing assembly 1 to separate the bottom cover plate 3 from the housing assembly 1.

[0031] In this application, the battery cell includes a housing assembly 1, a core pack 2, and a bottom cover plate 3. A cavity 111 is provided inside the housing assembly 1, and the core pack 2 is loaded in the cavity 111. The cavity 111 has a bottom opening, and the bottom opening of the cavity 111 is closed by the bottom cover plate 3, so that the housing assembly 1 and the bottom cover plate 3 enclose a sealed space to ensure the sealing of the battery cell.

[0032] A terminal assembly 4 is provided on the top of the housing assembly 1, and a fluid 5 is provided on the tab of the core package 2. When the core package 2 is loaded in the cavity 111 of the housing assembly 1, the fluid 5 contacts the terminal assembly 4 on the top of the housing assembly 1, thereby connecting the tab of the core package 2 with the terminal assembly 4 through the fluid 5. Then, when the bottom cover plate 3 is connected to the housing assembly 1 and the bottom opening of the cavity 111 is closed, the tab of the core package 2 is led out through the terminal assembly 4, realizing the lead-out of the positive and negative electrodes of the battery cell.

[0033] In this application, when the bottom cover plate 3 is not fixedly connected to the housing assembly 1, the bottom opening of the cavity 111 is open, and the core package 2 can be loaded into the housing assembly 1 through the bottom opening of the cavity 111; when the bottom cover plate 3 is fixedly connected to the housing assembly 1, the bottom opening of the cavity 111 is closed, so that the bottom cover plate 3 and the housing assembly 1 form a sealed space, and then the electrode tab of the core package 2 is connected to the electrode post assembly 4 through the fluid 5, so that the electrode post assembly 4 leads out the positive and negative electrodes of the battery cell, realizing the charging and discharging function of the battery cell.

[0034] In this application, a tear line is provided at the connection between the bottom cover plate 3 and the housing assembly 1. The bottom cover plate 3 can be separated from the housing assembly 1 by tearing the tear line. Therefore, the bottom cover plate 3 can be removed from the housing assembly 1, and the bottom opening of the cavity 111 can be opened so that the core pack 2 loaded in the cavity 111 can be taken out from the bottom opening of the cavity 111. This makes the replacement of the core pack 2 simple, convenient and easy to implement. In the event of a problem with the batch of battery cells, the waste of resources can be reduced by replacing the core pack 2.

[0035] Specifically, in actual implementation, the tear line at the connection between the bottom cover 3 and the shell body 11 can be set in a manner similar to the metal pull rings used to open cans and aluminum cans. Since the tear line at the connection between the bottom cover 3 and the shell assembly 1 is usually disposable, after each replacement of the core pack 2, the cavity 111 can be resealed by remaking the tear line at the connection between the bottom cover 3 and the shell body 11. This also facilitates subsequent separation of the bottom cover 3 and the shell body 11, thereby reducing resource waste.

[0036] In this embodiment, the housing assembly 1 includes a housing body 11 and a top cover 12. The top cover 12 and the housing body 11 are integrally formed, and the pole post assembly 4 is fixedly mounted on the top cover 12. In this application, the housing assembly 1 includes a housing body 11 and a top cover 12. The top cover 12 is disposed on the top of the housing body 11 and is integrally formed with the housing body 11.

[0037] The top of the housing body 11 is closed by the top cover plate 12, thereby forming a cavity 111 with a bottom opening by the top cover plate 12 and the housing body 11; then the bottom cover plate 12 is fixedly connected to the housing body 11, thereby closing the bottom opening of the cavity 111 by the bottom cover plate 12, thereby forming a sealed space by the bottom cover plate 12, the housing body 11 and the top cover plate 12, ensuring the airtightness of the battery cell.

[0038] The electrode assembly 4 is fixedly mounted on the top cover plate 12. When the core pack 2 is loaded in the cavity 111, the fluid 5 fixedly mounted on the tab of the core pack 2 contacts the electrode assembly 4 on the top cover plate 12, thereby connecting the tab of the core pack 2 with the electrode assembly 4 through the fluid 5, and then discharging the tab of the core pack 2 through the electrode assembly 4 to realize the charging and discharging function of the battery cell.

[0039] A disconnecting line is pre-embedded at the connection between the bottom cover plate 12 and the housing body 11. By tearing the disconnecting line, the bottom cover plate 3 can be separated from the housing body 11. Therefore, the bottom cover plate 3 can be removed from the housing body 11, and the bottom opening of the cavity 111 can be opened, so that the core pack 2 loaded in the cavity 111 can be taken out from the bottom opening of the cavity 111. This makes the replacement of the core pack 2 simple, convenient and easy to implement. In addition, when problems occur in batches of battery cells, the waste of resources can be reduced by replacing the core pack 2.

[0040] In this embodiment, the housing assembly 1 further includes an explosion-proof valve 13 disposed on the top cover plate 12, which is used to provide explosion-proof protection for the core package 2. In this application, the housing assembly 1 also includes an explosion-proof valve 13 disposed on the top cover plate 12. When the battery cell is overcharged, a large amount of gas is generated in the cavity 111 of the housing assembly 1, increasing the internal pressure of the cavity 111. At this time, the gas in the cavity 111 can act on the explosion-proof valve 13, releasing the gas and thus reducing the internal pressure of the cavity 111, preventing the battery from exploding and causing a safety accident.

[0041] In this embodiment, the fluid 5 is an elastic element. When the core package 2 is loaded in the cavity 111, the fluid 5 abuts against and is compressed by the electrode assembly 4. In this application, the fluid 5 is set as an elastic element. When the core package 2 is loaded into the cavity 111 from the bottom opening, the fluid 5 is compressed by squeezing it. Then, the bottom opening of the cavity 111 is closed by the bottom cover plate 3, thereby limiting the core package 2 in the cavity 111 and keeping the fluid 5 in a compressed state. This ensures the contact effect between the fluid 5 and the electrode assembly 4 and enhances the flow capacity of the fluid 5.

[0042] In this embodiment, the electrode assembly 4 includes a positive electrode 41 and a negative electrode 42 disposed at a distance from each other on the top cover plate 12, and the fluid 5 includes a positive electrode guide plate 51 that connects the positive electrode tab 21 of the core package 2 to the positive electrode 41, and a negative electrode guide plate 52 that connects the negative electrode tab 22 of the core package 2 to the negative electrode 42.

[0043] In this application, the electrode assembly 4 includes a positive electrode 41 and a negative electrode 42, which are arranged at intervals on the top cover plate 12. It is foreseeable that the tabs of the core package 2 include a positive electrode tab 21 and a negative electrode tab 22. Therefore, in this application, the fluid flow 5 includes a positive electrode guide plate 51 and a negative electrode guide plate 52, wherein the positive electrode guide plate 51 is fixedly disposed on the positive electrode tab 21, and the negative electrode guide plate 52 is fixedly disposed on the negative electrode tab 22.

[0044] When the core package 2 is loaded in the cavity 111, the positive electrode guide plate 51 contacts the positive electrode post 41, thereby connecting the positive electrode tab 21 of the core package 2 with the positive electrode post 41; the negative electrode guide plate 52 contacts the negative electrode post 42, thereby connecting the negative electrode tab 22 of the core package 2 with the negative electrode post 42. Thus, the positive electrode of the battery cell is led out through the positive electrode post 41, and the negative electrode of the battery cell is led out through the negative electrode post 42, realizing the charging and discharging function of the battery cell.

[0045] In this embodiment, the fluid 5 further includes a first guide spring 53 connecting the positive electrode guide plate 51 to the positive electrode tab 21 of the core package 2, and a second guide spring 54 connecting the negative electrode guide plate 52 to the negative electrode tab 22 of the core package 2. In this application, the fluid 5 also includes a first guide spring 53 and a second guide spring 54. The first guide spring 53 connects the positive electrode tab 21 of the core package 2 to the positive electrode guide plate 51, and the second guide spring 54 connects the negative electrode tab 22 of the core package 2 to the negative electrode guide plate 52.

[0046] When the core package 2 is loaded into the cavity 111 through the bottom opening of the cavity 111, the first guide spring 53 and the second guide spring 54 are compressed, thereby making the positive electrode guide plate 51 in close contact with the positive electrode post 41 on the top cover plate 12 and the negative electrode guide plate 52 in close contact with the negative electrode post 42 on the top cover plate 12 through the first guide spring 53 and the second guide spring 54, thus ensuring the contact effect between the fluid 5 and the electrode assembly 4 and enhancing the flow capacity of the fluid 5.

[0047] Furthermore, in this embodiment, there are multiple first guide springs 53 connecting the positive electrode guide plate 51 to the positive electrode tab 21 of the core package 2, and multiple second guide springs 54 connecting the negative electrode guide plate 52 to the negative electrode tab 22 of the core package 2. In this application, multiple first guide springs 53 and multiple second guide springs 54 are provided. Multiple first guide springs 53 simultaneously connect the positive electrode tab 21 of the core package 2 to the positive electrode guide plate 51, and multiple second guide springs 54 simultaneously connect the negative electrode tab 22 of the core package 2 to the negative electrode guide plate 52.

[0048] When the core package 2 is loaded into the cavity 111 through the bottom opening of the cavity 111, multiple first guide springs 53 and multiple second guide springs 54 are compressed simultaneously. Thus, through the multiple first guide springs 53, the positive electrode guide plate 51 is brought into close contact with the positive electrode post 41 on the top cover plate 12; through the multiple second guide springs 54, the negative electrode guide plate 52 is brought into close contact with the negative electrode post 42 on the top cover plate 12, further ensuring the contact effect between the fluid 5 and the electrode post assembly 4 and enhancing the flow capacity of the fluid 5.

[0049] In this embodiment, the side end of the core package 2 is provided with an arc-shaped guide portion 23, and the side wall of the housing body 11 is provided with an arc-shaped guide groove 112 that cooperates with the arc-shaped guide portion 23. In this application, the side end of the core package 2 is provided with an arc-shaped guide portion 23, and the side wall of the housing body 11 is provided with an arc-shaped guide groove 112.

[0050] When the core package 2 is loaded into the cavity 111 of the housing body 11, the arc-shaped guide portion 23 at the side end of the core package 2 is inserted into the arc-shaped guide groove 112 on the side wall of the housing body 11. The position of the core package 2 in the cavity 111 is limited by the cooperation between the arc-shaped guide groove 112 and the arc-shaped guide portion 23, thereby enhancing the stability of the core package 2 loaded in the cavity 111 and thus enhancing the stability of the battery cell structure.

[0051] Furthermore, in this embodiment, there are two arc-shaped guide portions 23 respectively located on both sides of the core package 2, and two arc-shaped guide grooves 112 respectively located on opposite side walls of the housing assembly 1. The two arc-shaped guide grooves 112 respectively cooperate with the two arc-shaped guide portions 23. In this application, arc-shaped guide portions 23 are provided at both ends of the core package 2, and arc-shaped guide grooves 112 are provided on opposite side walls of the housing assembly 1.

[0052] When the core package 2 is loaded into the cavity 111 of the housing body 11, the arc-shaped guide portions 23 at both ends of the core package 2 are respectively inserted into the arc-shaped guide grooves 112 on the opposite side walls of the housing body 11. Thus, through the cooperation of the two arc-shaped guide grooves 112 with the two arc-shaped guide portions 23, the position of the core package 2 in the cavity 111 is limited, further enhancing the stability of the core package 2 loaded in the cavity 111, thereby enhancing the stability of the battery cell structure.

[0053] The above-described contents can be implemented individually or in combination in various ways, and all such variations are within the protection scope of this utility model.

[0054] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A battery cell that facilitates core pack replacement, characterized in that: The device includes a housing assembly (1) having a cavity (111) with an opening at the bottom of the cavity (111), a core package (2) loaded in the cavity (111), and a bottom cover plate (3) that closes the bottom opening of the cavity (111). The housing assembly (1) has an electrode assembly (4) on top. The core package (2) has a fluid flow (5) on its tabs. The fluid flow (5) contacts the electrode assembly (4) to conduct the connection between the tabs of the core package (2) and the electrode assembly (4). The bottom cover plate (3) and the housing assembly (1) are connected by a tear line, which is used to separate the bottom cover plate (3) from the housing assembly (1).

2. A battery cell with an easily replaceable core pack as described in claim 1, characterized in that: The housing assembly (1) includes a housing body (11) and a top cover plate (12). The top cover plate (12) and the housing body (11) are an integral structure. The pole post assembly (4) is fixedly mounted on the top cover plate (12).

3. A battery cell with an easily replaceable core pack as described in claim 2, characterized in that: The housing assembly (1) also includes an explosion-proof valve (13) disposed on the top cover plate (12), the explosion-proof valve (13) being used to provide explosion-proof protection for the core package (2).

4. A battery cell with an easily replaceable core pack as described in claim 1, characterized in that: The fluid (5) is an elastic element. When the core package (2) is loaded in the cavity (111), the fluid (5) abuts against the pole assembly (4) and is compressed.

5. A battery cell with an easily replaceable core pack as described in claim 2, characterized in that: The electrode assembly (4) includes a positive electrode post (41) and a negative electrode post (42) arranged at intervals on the top cover plate (12). The fluid flow (5) includes a positive electrode guide plate (51) that connects the positive electrode tab (21) of the core package (2) to the positive electrode post (41), and a negative electrode guide plate (52) that connects the negative electrode tab (22) of the core package (2) to the negative electrode post (42).

6. A battery cell with an easily replaceable core pack as described in claim 5, characterized in that: The fluid (5) further includes a first guide spring (53) connecting the positive guide plate (51) to the positive electrode tab (21) of the core package (2), and a second guide spring (54) connecting the negative guide plate (52) to the negative electrode tab (22) of the core package (2).

7. A battery cell with an easily replaceable core pack as described in claim 6, characterized in that: The first guide spring (53) is a plurality of springs that connect the positive guide plate (51) to the positive electrode tab (21) of the core package (2), and the second guide spring (54) is a plurality of springs that connect the negative guide plate (52) to the negative electrode tab (22) of the core package (2).

8. A battery cell with an easily replaceable core pack as described in claim 1, characterized in that: The core package (2) has an arc-shaped guide portion (23) on its side end, and the side wall of the housing assembly (1) has an arc-shaped guide groove (112) that cooperates with the arc-shaped guide portion (23).

9. A battery cell with an easily replaceable core pack as described in claim 8, characterized in that: The arc-shaped guide portion (23) is two respectively located on both sides of the core package (2), and the arc-shaped guide groove (112) is two respectively located on the opposite side walls of the housing assembly (1). The two arc-shaped guide grooves (112) respectively cooperate with the two arc-shaped guide portions (23).

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