Single battery and battery pack

Abstract

The utility model relates to the technical field of batteries, and discloses a single battery and a battery pack. The single battery has a first direction and comprises a shell with an accommodating cavity and a cover plate which is connected with the shell along the first direction and covers the accommodating cavity. The cover plate is provided with a pole and a protection assembly. The cover plate is provided with a mounting surface deviating from the accommodating cavity; the pole penetrates through the cover plate; the protection assembly comprises a mounting seat and a protection cover, the mounting seat is connected to the mounting surface, the mounting seat is provided with a mounting hole penetrating in the first direction, and the hole wall of the mounting hole surrounds the pole; and the protective cover and the mounting seat are connected through buckling matching of the first buckling part and the second buckling part. The mounting base and the protective cover jointly form overall protection on the pole, so that the single battery is protected in the transfer process, and the pole is prevented from being collided and rubbed by the outside.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a single battery and a battery pack. BACKGROUND

[0002] The single battery is a core component in the field of new energy technology. The single battery can provide power energy to the use equipment alone or in series and parallel. The safety performance of the single battery is one of the core performance indicators.

[0003] The existing single battery is provided with a pole, and the pole is electrically connected with the battery cell inside the battery to realize the electrical conduction between the single battery and the outside world. The existing single battery has the problem of being easy to damage. CONTENT OF THE UTILITY MODEL

[0004] The present application provides a single battery and a battery pack to solve the problem that the existing single battery is easy to damage.

[0005] A single battery has a first direction, and the single battery comprises: a shell having a receiving cavity; a cover plate connected with one end of the shell along the first direction, the cover plate covers the receiving cavity, and the cover plate has a mounting surface away from the receiving cavity along the first direction; a pole provided in the cover plate; and a protection assembly comprising a mounting seat and a protection cover, the mounting seat is connected to the mounting surface, the mounting seat is provided with a mounting hole penetrating along the first direction, the hole wall of the mounting hole surrounds the pole, and the mounting seat is provided with a second buckle part; the protection cover is provided with a first buckle part, the first buckle part and the second buckle part are buckled to cover the pole along the first direction.

[0006] In the embodiment of the present application, when the protection cover is in a closed state, the side wall of the mounting seat surrounds the side wall of the pole to form protection for the side wall of the pole, the protection cover protects the side of the pole away from the mounting surface, and the mounting seat and the protection cover jointly form overall protection for the pole. This makes the single battery protected during transportation, thereby avoiding the collision and friction of the pole with the outside world and ensuring the performance of the single battery. Moreover, the protection assembly itself has the first buckle part and the second buckle part, the protection cover is closed on the mounting seat to form a protection state, and only the mounting seat needs to be assembled on the cover plate during assembly of the protection assembly, without the need to add other redundant connection structures on the cover plate. The mounting process is relatively simple and convenient. The buckle cooperation of the first buckle part and the second buckle part also enables the protection cover to be opened at any time, thereby facilitating maintenance by the operator.

[0007] As one of the optional embodiments of the present application, the single battery also has a third direction intersecting the first direction, one end of the protection cover along the third direction is connected with the mounting seat, and the first buckle part is arranged at the other end of the protection cover along the third direction.

[0008] As one of the optional embodiments of this application, the first latching part is disposed on the side of the protective cover near the mounting surface along the first direction, the first latching part is a protruding post, and the first latching part protrudes in the direction near the mounting base along the first direction; the second latching part is disposed on the side of the mounting base away from the mounting surface along the first direction, the second latching part is a recessed hole, and the second latching part is recessed in the direction near the mounting surface along the first direction.

[0009] In this embodiment, a specific structure of the protective component is proposed. In the third direction, the rotation axis of the protective cover and the first latch are located at both ends of the protective cover. In use, rotating the protective cover allows for easier and smoother opening or closing. The structural design utilizing the protruding post and recessed hole significantly reduces production difficulty and economic costs.

[0010] As one of the optional embodiments of this application, the pole post has a sidewall located outside the receiving cavity, and a gap is left between the inner wall of the mounting hole and the sidewall.

[0011] In this embodiment, the coverage area of ​​the mounting hole is larger than the coverage area of ​​the pole post. This avoids interference during the assembly of the mounting base to the cover plate, prevents collision between the mounting base and the pole post, reduces pole post damage during the installation process, and facilitates smooth assembly of the mounting base to the cover plate.

[0012] As one of the optional embodiments of this application, the mounting surface is provided with a mating hole, the mating hole is recessed in the direction of the first direction toward the receiving cavity, and a mating shaft is protruded on one side of the mounting base facing the mounting surface, the mating shaft protrudes in the direction of the first direction toward the receiving cavity, and the mating shaft is inserted into the mating hole.

[0013] In this embodiment, when the mounting base is assembled onto the cover plate, the position of the mounting base can be quickly and accurately positioned by the insertion and mating of the mating shaft and the mating hole, thereby improving the convenience and accuracy of installation.

[0014] As one of the optional embodiments of this application, the single cell also has a second direction intersecting the first direction. The mounting base includes a middle frame and an extension. The middle frame is provided with a mounting hole that passes through the first direction. The extension is connected to the middle frame, and the mating shaft is disposed on the side of the extension facing the mounting surface along the first direction.

[0015] In this embodiment, the extension increases the contact area between the mounting base and the cover plate, ensuring the stability of the mounting base. When the mounting base is subjected to external pressure, it can provide a smoother and more stable pressure bearing performance, ensuring the uniformity of the force on the cover plate. Furthermore, the mating shaft is set on the extension, which allows the mating shaft to be away from the pole post, further making the mounting hole position farther away from the pole post, ensuring the reliability of the pole post installation. It is understood that if the mounting hole is opened in a position on the cover plate close to the pole post, it will affect the strength of the cover plate near the pole post, resulting in an unreliable connection between the pole post and the cover plate.

[0016] As one of the optional embodiments of this application, the single cell also has a third direction that intersects the first direction and the second direction in pairs. The middle frame includes: a plurality of horizontal columns, which are arranged opposite to each other in the second direction; and a vertical column, which is connected to one end of the horizontal column in the third direction and is located between two adjacent horizontal columns arranged in the second direction. The plurality of horizontal columns and the vertical column enclose a mounting hole. The extension is connected to the side of the horizontal column away from the mounting hole.

[0017] In this embodiment, the middle frame is C-shaped, with an opening at one end in the third direction to expose one side of the side wall of the electrode post. This design allows for welding connections using the exposed area without opening the protective cover when the individual battery is installed into the battery pack using a welding plate, making the operation convenient.

[0018] As one of the optional embodiments of this application, the protective cover is hinged to the end of the longitudinal column away from the mounting surface, and the end of the protective cover away from the longitudinal column is provided with an edge plate. The edge plate extends in a first direction toward the mounting surface, and the first latching part and the second latching part are engaged so that the edge plate covers the pole column in a third direction.

[0019] As one of the optional embodiments of this application, the dimension of the extension in the first direction is the extension height, and the extension height gradually decreases in the second direction from the direction close to the mounting hole to the direction away from the mounting hole.

[0020] On the other hand, this application also provides a battery pack comprising: a single battery cell as described above.

[0021] One of the above technical solutions has the following advantages or beneficial effects: In the embodiment of this application, the wall of the mounting hole of the mounting base surrounds the electrode post, forming a protection for the side wall of the electrode post. The protective cover covers the electrode post along the first direction and protects the end of the electrode post away from the mounting surface. The mounting base and the protective cover together form an overall protection for the electrode post. This protects the electrode post during the transportation of the single battery, thereby avoiding the electrode post from being hit and rubbed by the outside world and ensuring the performance of the single battery. Attached Figure Description

[0022] The technical solution and other beneficial effects of this application will become apparent from the following detailed description of specific embodiments in conjunction with the accompanying drawings.

[0023] Figure 1 This is an overall structural diagram of a single battery cell provided in an embodiment of this application;

[0024] Figure 2 This is an exploded structural diagram of a single battery cell provided in an embodiment of this application;

[0025] Figure 3This is a structural diagram provided in an embodiment of this application to illustrate the connection relationship between the cover plate and the protective components;

[0026] Figure 4 This is an exploded structural diagram of a protective component provided in an embodiment of this application;

[0027] Figure 5 This is an exploded structural diagram provided in an embodiment of this application to illustrate a protective component from another perspective.

[0028] Reference numerals: 1, outer casing; 11, housing; 12, cover plate; 121, mounting surface; 10, receiving cavity; 100, opening;

[0029] 2. Terminal post; 21. Side wall; 22. Positive terminal post; 23. Negative terminal post; 220. Plastic ring;

[0030] 3. Protective components; 31. Mounting base; 311. Middle frame; 3111. Horizontal column; 3112. Vertical column; 312. Extension; 32. Protective cover; 30. Mounting hole; 321. Edge plate;

[0031] 41. Second buckle part; 42. First buckle part;

[0032] 51. Matching holes; 52. Matching shafts;

[0033] 6. Electrode assembly; 61. Core; 62. Positive electrode tab; 63. Negative electrode tab;

[0034] 71. Hinge shaft; 710. Groove; 72. Hinge protrusion; 720. Hinge hole;

[0035] Z, first direction; X, second direction; Y, third direction. Detailed Implementation

[0036] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0037] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the term "and / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Furthermore, the character " / " in this document, unless otherwise specified, generally indicates that the preceding and following related objects have an "or" relationship.

[0038] Individual battery cells typically have terminals for electrical conduction. During the processing and transportation of individual batteries, they undergo multiple transfers, during which the terminals are usually exposed to the external environment. Therefore, the terminals may be damaged by impacts, friction, and other external environmental factors, affecting the production, processing, and performance of the individual battery. To address this, this application provides an individual battery that reduces the impact of the external environment on the terminals, ensuring battery performance.

[0039] The following is in conjunction with the appendix Figures 1-5 This application will be further described below.

[0040] Reference Figure 1 This application discloses a single-cell battery having intersecting first direction Z, second direction X, and third direction Y. In one example, the first direction Z, the second direction X, and the third direction Y form a spatial rectangular coordinate system.

[0041] Reference Figure 2 The single-cell battery includes a housing 11, an electrode assembly 6, and a cover plate 12. In some examples, the housing 11 is square and has a receiving cavity 10, with an opening 100 formed at one end of the receiving cavity 10 in a first direction Z. The thickness direction of the cover plate 12 is the first direction Z, and the cover plate 12 is connected to the opening 100 of the housing 11 along the first direction Z to seal the receiving cavity 10. In some examples, the cover plate 12 is welded to the periphery of the opening 100.

[0042] Electrode assembly 6 is disposed within accommodating cavity 10. Electrode assembly 6 is formed by laminating or winding a positive electrode sheet, a negative electrode sheet, and a separator. Electrode assembly 6 includes a core 61, a positive electrode tab 62, and a negative electrode tab 63. The positive electrode tab 62 and the negative electrode tab 63 are integrally connected to the core 61, and both the positive electrode tab 62 and the negative electrode tab 63 are located on the side of the core 61 facing the cover plate 12.

[0043] Reference Figure 2 and Figure 3 The single-cell battery also includes a terminal post 2 and a protective assembly 3, both of which are disposed on a cover plate 12. The protective assembly 3 is used to protect the terminal post 2. Specifically, the cover plate 12 has a mounting surface 121 facing away from the receiving cavity 10. The terminal post 2 passes through the cover plate 12 along a first direction Z. A portion of the terminal post 2 protrudes in a direction away from the receiving cavity 10 relative to the mounting surface 121. The protruding portion of the terminal post 2 has a sidewall 21 along its own circumference. Here, the circumferential sidewall 21 refers to the side of the protruding portion of the terminal post 2 extending along the first direction Z.

[0044] In some examples, the individual cell also includes an insulating structure. Optionally, for example, the insulating structure may be a plastic ring 220, a portion of which surrounds the outer side of the portion of the terminal post 2 that passes through the cover plate 12, and the remaining portion of which is positioned between the terminal post 2 and the cover plate 12 in the first direction Z. A mounting hole 30 surrounds the outer sides of the plastic ring 220 and the terminal post 2, and the cover plate 12 covers the side of the terminal post 2 and the plastic ring 220 facing away from the mounting surface 121. The protective assembly 3 provides overall protection for the plastic ring 220 and the terminal post 2.

[0045] It should be noted that in some other examples, if the single cell does not include the plastic ring 220, then the mounting hole 30 of the mounting base 31 can be directly surrounded on the outside of the side wall 21 of the terminal post 2 to directly protect the terminal post 2.

[0046] In some examples, the terminal 2 includes a positive terminal 22 and a negative terminal 23, which are spaced apart along a second direction X. The positive terminal 22 and the negative terminal 23 are respectively positioned opposite to the positive tab 62 and the negative tab 63 in a first direction Z. The positive terminal 22 and the negative terminal 23 are electrically connected to the corresponding positive tab 62 and the negative tab 63 to achieve electrical conduction between the single battery cell and the external environment. In some examples, the positive terminal 22 is welded to the positive tab 62, or the positive terminal 22 is connected to the positive tab 62 via an adapter piece; the electrical connection between the negative terminal 23 and the negative tab 63 is similar.

[0047] It should be noted that in this embodiment, both poles 2 pass through the cover plate 12 and each forms a sidewall 21. Two protective components 3 are provided to protect both poles 2 respectively. However, it is not excluded that in other alternative embodiments, only one pole 2 may be protected, i.e., only one protective component 3 may be provided to protect either the positive pole 22 or the negative pole 23. Since the structures of the two poles 2 and the corresponding protective components 3 are identical, only one pole 2 and its corresponding protective component 3 will be described in detail.

[0048] Reference Figure 2 and Figure 3 The protective component 3 includes a mounting base 31 and a protective cover 32. The mounting base 31 is connected to the mounting surface 121. The mounting base 31 has a mounting hole 30 that runs through the first direction Z. The mounting hole 30 surrounds the side wall 21. The protective cover 32 is flipped and connected to the side of the mounting base 31 away from the mounting surface 121. The protective cover 32 is provided with a first latching part 42, and the mounting base 31 is provided with a second latching part 41. The first latching part 42 and the second latching part 41 are latched together, and the protective cover 32 covers the side of the pole post 2 away from the mounting surface 121.

[0049] In this embodiment, the first latching part 42 and the second latching part 41 cooperate with each other to enable the protective cover 32 to form a locked closed state and an unlocked open state. In the open state, the protective cover 32 exposes part of the sidewall 21 of the terminal post 2; in the closed state, the wall of the mounting hole 30 of the mounting base 31 surrounds the terminal post 2, protecting the sidewall 21 of the terminal post 2. The protective cover 32 covers the terminal post 2 along the first direction Z, protecting the end of the terminal post 2 away from the mounting surface 121. The mounting base 31 and the protective cover 32 together form an overall protection for the terminal post 2. This protects the terminal post 2 of the single battery during transportation, preventing it from being subjected to external impacts and friction, thus ensuring the performance of the single battery.

[0050] Furthermore, the protective component 3 itself has a first latching part 42 and a second latching part 41. The protective cover 32 is closed on the mounting base 31 to form a protective state. When assembling the protective component 3, it is only necessary to assemble the mounting base 31 onto the cover plate 12. There is no need to add other complicated connecting structures to the cover plate 12, making the installation process relatively simple and convenient. The latching cooperation between the first latching part 42 and the second latching part 41 also allows the protective cover 32 to be opened at any time, thus facilitating maintenance by operators.

[0051] Reference Figure 3 and Figure 5 As one of the optional embodiments of this application, the cover plate 12 is recessed from the mounting surface 121 and has a mating hole 51. The mounting base 31 has a mating shaft 52 protruding from one side facing the mounting surface 121, and the mating shaft 52 is inserted into the mating hole 51.

[0052] Specifically, the mating holes 51 are provided on the outer periphery of the cover plate 12 located on the pole post 2. In one example, four mating holes 51 are provided, respectively located at both ends of the pole post 2 in the second direction X. Each end of the pole post 2 in the second direction X is provided with two mating holes 51.

[0053] In this embodiment, when the mounting base 31 is assembled onto the cover plate 12, the position of the mounting base 31 can be quickly and accurately positioned by the insertion and engagement of the mating shaft 52 and the mating hole 51, improving the convenience and accuracy of installation. In this embodiment, the mounting base 31 is fixed to the cover plate 12 by welding the mounting base 31 to the cover plate 12. The mating shaft 52 and the mating hole 51 serve as guides and matchers, preventing displacement of the mounting base 31 during welding and ensuring the accuracy of the mounting base 31's position.

[0054] It should be noted that the connection between the mounting base 31 and the cover plate 12 is not limited to welding. For example, in an optional embodiment, the mating shaft 52 is a plastic shaft, which is heat-fused into the mating hole 51. In this embodiment, another structure is provided for the mounting base 31 to be connected to the cover plate 12. When assembling the protective component 3, the mating shaft 52 of the mounting base 31 is inserted into the mating hole 51, and then the cover plate 12 is heated to a set temperature, i.e., the melting temperature of plastic: generally 100-200℃. The mating shaft 52 melts into the mating hole 51, thereby achieving a fixed connection between the mounting base 31 and the cover plate 12.

[0055] For example, in an optional embodiment, the mating shaft 52 is interference-fitted into the mating hole 51. In this embodiment, the mounting base 31 can be fixed by the interference fit between the mating shaft 52 and the mating hole 51, thus eliminating the need for welding or bonding of the mounting base 31, further improving the ease of installation. Furthermore, the interference fit design in this embodiment allows the mounting base 31 to be easily removed from the cover plate 12, making it more flexible in use. When a single battery cell is in a situation requiring protection, such as during transport or in an unstable storage environment, the protective component 3 is temporarily fixed to the cover plate 12 by the interference fit between the mating shaft 52 and the mating hole 51. When the single battery cell is in a stable external environment with minimal impact, such as when preparing to pack it into a battery pack, the protective component 3 can be removed from the cover plate 12, reducing the impact of the weight and volume of the protective component 3 on the energy density of the battery pack.

[0056] As one optional embodiment of this application, a gap is left between the inner wall of the mounting hole 30 and the side wall 21 of the pole post 2. In some examples, the gap between the inner wall of the mounting hole 30 and the side wall 21 is set to 0.5mm-1mm. In this embodiment, the coverage area of ​​the mounting hole 30 is larger than the coverage area of ​​the pole post 2, which reduces interference during the assembly of the mounting base 31 to the cover plate 12, reduces collision between the mounting base 31 and the pole post 2, reduces damage to the pole post 2 during the installation process, and facilitates the smooth assembly of the mounting base 31 onto the cover plate 12.

[0057] Reference Figure 4 and Figure 5 As one of the optional embodiments of this application, the mounting base 31 includes a middle frame 311 and an extension 312. The middle frame 311 has a mounting hole 30 that extends through in a first direction. The extension 312 is connected to the side of the middle frame 311 away from the mounting hole 30 and extends in the direction away from the mounting hole 30. The mating shaft 52 is disposed on the side of the extension 312 facing the cover plate 12.

[0058] In this embodiment, the extension 312 increases the contact area between the mounting base 31 and the cover plate 12, ensuring the stability of the mounting base 31. When the mounting base 31 is subjected to external pressure, it can provide a smoother and more stable pressure bearing performance, ensuring the uniformity of the force on the cover plate 12. Furthermore, the mating shaft 52 is disposed on the extension 312, which allows the mating shaft 52 to be far away from the pole post 2. This further makes the mounting hole 30 located far away from the pole post 2, ensuring the reliability of the pole post 2 installation. It is understood that if the mounting hole 30 is opened in a place where the cover plate 12 is close to the pole post 2, it will affect the strength of the cover plate 12 near the pole post 2, resulting in an unreliable connection between the pole post 2 and the cover plate 12.

[0059] More specifically, the middle frame 311 includes interconnected horizontal columns 3111 and vertical columns 3112, wherein multiple horizontal columns 3111 are provided and are arranged opposite each other in the second direction X; the vertical columns 3112 are connected to one end of the multiple horizontal columns 3111 located in the third direction Z, and are located between two adjacent horizontal columns 3111 arranged in the second direction X, and the multiple horizontal columns 3111 and the vertical columns 3112 enclose to form a mounting hole 30; wherein the extensions 312 are respectively provided on the side of the horizontal columns 3111 away from the mounting hole 30.

[0060] Specifically, in some examples, two horizontal posts 3111 are provided, and the two horizontal posts 3111 are arranged opposite each other in the second direction X; the vertical post 3112 connects to the two horizontal posts 3111 at one end in the third direction Y, and the horizontal posts 3111 and the vertical post 3112 enclose to form a mounting hole 30. The extension portions 312 are respectively provided on the opposite sides of the horizontal posts 3111, and the dimension of the extension portion 312 along the first direction Z is the extension height. The extension height gradually decreases along the second direction Z from the direction close to the mounting hole 30 to the direction away from the mounting hole 30.

[0061] In this embodiment, the hinge structure between the protective cover 32 and the mounting base 31 is achieved through a hinge shaft 71 and a hinge hole 720. Specifically, one end of the protective cover 32 has a slot 710 extending along the first direction Z. The slot 710 extends along the second direction X. A hinge shaft 71 is fixedly connected within the slot 710. One end of the hinge shaft 71 is fixedly connected to the inner wall of the slot 710 at one end in the second direction X, and the other end of the hinge shaft 71 is fixedly connected to the inner wall of the slot 710 at the other end in the second direction X. An installation gap is left between the hinge shaft 71 and the inner wall of the slot 710 along one side of the second direction X.

[0062] Correspondingly, a hinge boss 72 is provided on the side of the longitudinal column 3112 facing away from the mounting surface 121. The hinge boss 72 has a hinge hole 720 extending along the second direction X. During installation, the hinge shaft 71 passes through the hinge hole 720 and is rotatably disposed within the hinge hole 720, with both ends of the hinge shaft 71 extending beyond the hinge hole 720. To ensure structural stability, the side of the hinge boss 72 facing away from the mounting surface 121 is designed as an arc-shaped surface.

[0063] It should be noted that in this embodiment, the protective cover 32 is hinged to the side of the mounting base 31 facing away from the mounting surface 121. However, it is not excluded that in other alternative embodiments, the protective cover 32 may also be hinged to other sides of the mounting base 31. For example, in some alternative examples, the protective cover 32 is hinged to the side of the mounting base 31 extending along the first direction Z. Ultimately, it is sufficient that the protective cover 32 has an open or closed posture, ensuring that in the open posture, the side wall 21 of the pole post 2 or the side facing away from the mounting surface 121 is exposed, and in the closed posture, it can cover the side of the pole post 2 facing away from the mounting surface 121 to protect that side of the pole post 2.

[0064] In this embodiment, the middle frame 311 is C-shaped, with an opening at one end facing Y to expose one side of the side wall 21 of the pole post 2. This design allows for welding connections without opening the protective cover 32 when the individual battery is installed into the battery pack using a welding plate, making the operation convenient.

[0065] Reference Figure 4 and Figure 5 As one optional embodiment of this application, the protective cover 32 is rotatably connected to the mounting base 31 at one end along the third direction Y, and the first latching part 42 is disposed at the other end of the protective cover 32 along the third direction Y. The first latching part 42 is a protruding post, which is disposed on the side of the protective cover 32 near the mounting base 31 and protrudes along the first direction Z towards the mounting base 31. The second latching part 41 is a recessed hole, which is recessed along the first direction Z away from the protective cover 32 and is disposed on the side of the mounting base 31 away from the mounting surface 121.

[0066] Specifically, there are two first latching parts 42, both located at the end of the protective cover 32 away from the hinge side, and two second latching parts 41, respectively located at the ends of the two horizontal posts 3111 away from the vertical posts 3112.

[0067] It should be noted that, in one example, the protective cover 32 is made of insulating material, and plastic material is optional. The first snap-fit ​​part 42 is made of elastic plastic material, which makes the first snap-fit ​​part more easily deformable, thereby adapting to the plug-in mating operation between it and the second snap-fit ​​part 41.

[0068] It should be noted that in some alternative examples, the positions of the first latching part 42 and the second latching part 41 can also be in other areas. For example, both the first latching part 42 and the second latching part 41 can be located in the middle of the horizontal post 3111, or at one end of the horizontal post 3111 near the vertical post 3112. Therefore, the positions of the first latching part 42 and the second latching part 41 are not strictly limited, as long as the cooperation of the first latching part 42 and the second latching part 41 enables the protective cover 32 and the mounting base 31 to be in an open and closed state.

[0069] As one optional embodiment of this application, the protective cover 32 is hinged to the side of the longitudinal post 3112 facing away from the mounting surface 121. An edge plate 321 is provided at the end of the protective cover 32 away from the hinged side. The edge plate 321 extends along the first direction Z towards the mounting surface 121, and a first latching part 42 and a second latching part 41 engage to cover the pole post 2 along the third direction Y. More specifically, the edge plate 321 can cover the side of the pole post 2 away from the longitudinal post 3112.

[0070] In this embodiment, when the protective cover 32 is closed, the edge plate 321 protects the exposed sidewall 21, thus achieving more comprehensive protection. Furthermore, when a single battery cell needs to be electrically connected to a power source or other single battery cells, the edge plate 321 is opened along with the protective cover 32, thereby exposing at least part of the sidewall 21. This allows for welding of the connecting plates by minimizing the exposed surface area, making the process more flexible.

[0071] It should be noted that in some optional examples, the first latching part 42 can also be provided on the edge plate 321, and the second latching part 41 can be provided on the side surface of the side wall 21 away from the longitudinal column 3112 along the third direction Z. In this way, the latching cooperation between the first latching part 42 and the second latching part 41 can still realize the open or closed state between the protective cover 32 and the mounting base 31.

[0072] A battery pack comprising: individual cells as described above.

[0073] The above description is only a partial implementation of the embodiments of this application and is not intended to limit the application in any way. The protection scope of the embodiments of this application is not limited thereto. Any simple modifications, equivalent changes and alterations that can be easily conceived by those skilled in the art within the technical scope disclosed in the embodiments of this application should be included within the protection scope of the embodiments of this application.

Claims

1. A single cell, characterized by, The monomer battery has a first direction (Z), and the monomer battery comprises: a shell (11) having a containing cavity (10); a cover plate (12) connected to one end of the shell (11) along the first direction (Z), the cover plate (12) covering the containing cavity (10), the cover plate (12) having a mounting surface (121) away from the containing cavity (10) along the first direction (Z); a pole (2) penetrating the cover plate (12); a protection assembly (3) comprising a mounting base (31) and a protection cover (32), the mounting base (31) being connected to the mounting surface (121), the mounting base (31) being provided with a mounting hole (30) penetrating along the first direction (Z), the hole wall of the mounting hole (30) surrounding the pole (2), the mounting base (31) being provided with a second buckle part (41); the protection cover (32) being provided with a first buckle part (42), the first buckle part (42) and the second buckle part (41) being buckled to make the protection cover (32) cover the pole (2) along the first direction (Z).

2. The unit cell of claim 1, wherein, The monomer battery also has a third direction (Y) intersecting the first direction (Z), one end of the protection cover (32) along the third direction (Y) being connected to the mounting base (31), and the first buckle part (42) being arranged at the other end of the protection cover (32) along the third direction (Y).

3. The unit cell of claim 1, wherein, The first buckle part (42) is arranged on the side of the protection cover (32) along the first direction (Z) close to the mounting surface (121), the first buckle part (42) being a protruding column, and the first buckle part (42) being protruded in the direction close to the mounting base (31) along the first direction (Z); the second buckle part (41) is arranged on the side of the mounting base (31) along the first direction (Z) away from the mounting surface (121), the second buckle part (41) being a recessed hole, and the second buckle part (41) being recessed in the direction close to the mounting surface (121) along the first direction (Z).

4. The cell of claim 1 wherein, The pole (2) has a side wall (21) located outside the containing cavity (10), and the inner hole wall of the mounting hole (30) is spaced apart from the side wall (21).

5. The cell of claim 1 wherein, The mounting surface (121) is provided with a counterfit hole (51) recessed in the direction close to the containing cavity (10) along the first direction (Z), the side of the mounting base (31) facing the mounting surface (121) is provided with a counterfit shaft (52) protruded in the direction close to the containing cavity (10) along the first direction (Z), and the counterfit shaft (52) is inserted into the counterfit hole (51).

6. The unit cell of claim 5, wherein, The monomer battery also has a second direction (X) intersecting with the first direction (Z), the mounting seat (31) comprises a middle frame (311) provided with the mounting hole (30) penetrating along the first direction (Z) and an extension part (312) connected with the middle frame (311), the extension part (312) extends along the second direction (X) towards a direction away from the mounting hole (30), and the pair of shafts (52) are arranged on a side of the extension part (312) along the first direction (Z) towards the mounting surface (121).

7. The unit cell of claim 6, wherein, The monomer battery also has a third direction (Y) intersecting with the first direction (Z) and the second direction (X) in pairs, the middle frame (311) comprises: a plurality of horizontal columns (3111) arranged oppositely in the second direction (X); a vertical column (3112) connected with one end of the horizontal column (3111) in the third direction (Y) and located between two horizontal columns (3111) arranged adjacently in the second direction (X), and a plurality of horizontal columns (3111) and the vertical column (3112) circumscribe to form the mounting hole (30); wherein the extension part (312) is connected with a side of the horizontal column (3111) away from the mounting hole (30).

8. The unit cell of claim 7, wherein, The protective cover (32) is hinged to one end of the vertical column (3112) away from the mounting surface (121), an edge plate (321) is arranged on an end of the protective cover (32) away from the vertical column (3112), the edge plate (321) extends along the first direction (Z) towards the mounting surface (121), and the first buckle part (42) is buckled with the second buckle part (41) to make the edge plate (321) cover the pole (2) along the third direction (Y).

9. The unit cell of claim 6, wherein, The dimension of the extension part (312) along the first direction (Z) is an extension height, and the extension height gradually decreases along the second direction (X) from a direction close to the mounting hole (30) to a direction away from the mounting hole (30).

10. A battery pack, characterized by, Comprise: The monomer battery of any one of claims 1-9.

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