Single battery and battery pack

Abstract

The utility model discloses a single battery and a battery pack. The single battery has a first direction and comprises a shell and a cover plate. The shell is provided with a containing cavity, the cover plate is connected with one end, in the first direction, of the shell, the cover plate covers the containing cavity, and the cover plate is provided with a mounting face deviating from the containing cavity in the first direction. The cover plate is provided with an anti-explosion hole and an anti-explosion valve, the anti-explosion hole penetrates through the cover plate in the first direction, and the anti-explosion valve covers and seals the anti-explosion hole. The protection assembly comprises a base and a turning cover, the base is connected to the mounting surface, a through pressure relief opening is formed in the base in the first direction, and the turning cover is rotationally connected to the base to cover and seal the pressure relief opening; a first connecting part is arranged on the base, a second connecting part is arranged on the turning cover, and the first connecting part is connected with the second connecting part. In the application, the protection assembly forms integral protection on the explosion-proof hole, the influence of the external environment is reduced, so that the influence of the external environment is reduced, the explosion-proof valve is effectively protected, and the safety performance of the single battery is ensured.

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 for the equipment after being connected in series and in parallel.

[0003] Generally, an explosion-proof valve is arranged on the single battery to quickly discharge gas when thermal runaway occurs, so as to reduce the occurrence of explosion and other dangerous situations. However, the explosion-proof valve is easily affected by the external environment, thereby affecting the safe use of the single battery. CONTENT OF THE UTILITY MODEL

[0004] The present application provides a single battery and a battery pack, so as to provide stable and reliable protection for the explosion-proof valve, and to ensure the safety performance of the single battery.

[0005] In a first aspect, the present application provides a single battery having a first direction, the single battery comprising: a shell having a containing cavity; a cover plate connected to one end of the shell along the first direction, the cover plate sealing the containing cavity, the cover plate having a mounting surface away from the containing cavity along the first direction; an explosion-proof valve having a through explosion-proof hole arranged on the cover plate along the first direction, the explosion-proof valve being connected to one side of the cover plate away from the mounting surface, the explosion-proof valve sealing the explosion-proof hole; and a protection assembly comprising a base and a flip cover, the base being connected to the mounting surface, a through pressure relief opening being arranged on the base along the first direction, the pressure relief opening corresponding to the explosion-proof hole, the flip cover being connected to the base; wherein the base is provided with a first connecting part, the flip cover is provided with a second connecting part, the first connecting part is connected to the second connecting part, and the flip cover seals the pressure relief opening.

[0006] When the first connecting part is connected to the second connecting part, the flip cover seals the pressure relief opening, the protection assembly forms an overall protection for the explosion-proof hole, and the external sharp object touches the explosion-proof valve or the debris and other sundries fall into the explosion-proof valve, thereby reducing the influence of the external environment and effectively protecting the explosion-proof valve. Due to the structural design of the protection assembly, when the first connecting part is detached from the second connecting part, the flip cover is in an open state, and the operator can open the flip cover at any time to observe the condition of the explosion-proof valve. On the basis of protecting the explosion-proof valve, the explosion-proof valve can be conveniently monitored, and the use is more flexible.

[0007] As one of the optional embodiments of the present application, the single battery further has a third direction intersecting the first direction, the flip cover is rotationally connected to the base at one end along the third direction, and the second connecting part is arranged at the other end of the flip cover along the third direction.

[0008] As one of the optional embodiments of the present application, the first connecting part is arranged at the end of the base away from the mounting surface, the first connecting part is a plug-in hole, and the first connecting part is recessed in the direction close to the mounting surface along the first direction.

[0009] The second connecting part is arranged on the side of the cover close to the mounting surface, and is arranged as a protrusion, which protrudes in the direction close to the mounting surface along the first direction, and is clamped in the first connecting part.

[0010] The above technical solution is achieved, and a specific structure of the connection between the cover and the base is provided. The cover is opened and closed through the clamping cooperation of the first connecting part and the second connecting part, which is simple in structure, convenient in production and processing, and easy to operate.

[0011] As one of the optional embodiments of the present application, the first connecting part is arranged as a first magnetic attraction part on the base, and the second connecting part is arranged as a second magnetic attraction part on the cover, and the first connecting part and the second connecting part are magnetically attracted to each other.

[0012] The above technical solution is achieved, and another specific structure of the connection between the cover and the base is provided. The opening and closing state is achieved through magnetic attraction, which is stable and reliable in connection, simple in production and processing, and the gas can directly rush open the cover for exhaust when thermal runaway occurs, and the use process is relatively flexible and convenient.

[0013] As one of the optional embodiments of the present application, the cover is provided with a rotating shaft, and the base is provided with a mounting hole at the end away from the mounting surface, and the rotating shaft is located in the mounting hole.

[0014] As one of the optional embodiments of the present application, the mounting surface is provided with a connecting hole, which is recessed in the direction close to the accommodating cavity along the first direction, and the end of the base close to the mounting surface is provided with a connecting shaft, which is protruded in the direction close to the accommodating cavity along the first direction, and the connecting shaft is arranged in the connecting hole.

[0015] The above technical solution is achieved, and when the base is installed and fixed, the connecting shaft is first inserted into the connecting hole to position the base, and then the welding or bonding process is performed. The insertion cooperation of the connecting shaft and the connecting hole can quickly and accurately position the installation position of the base, thereby improving the convenience and accuracy of the base installation.

[0016] As one of the optional embodiments of the present application, the single battery further comprises a protection part connected to the mounting surface along the first direction, the protection part is located between the base and the mounting surface, and covers the explosion-proof hole, and the protection part and the explosion-proof valve are arranged in the first direction.

[0017] The protection piece provides an additional protection outside the protection assembly, forms double protection in cooperation with the protection assembly, and is arranged between the cover plate and the base. The base press-bonds the protection piece on the cover plate, improves the sealing performance, and reduces the entry of external water vapor or oil mist into the explosion-proof hole to contact the explosion-proof valve, thereby further reducing the influence of the external environment and providing more stable protection under the basis function of visualization.

[0018] As one of the optional embodiments of the present application, in the first direction, the protection piece covers the connecting hole, and the connecting shaft is arranged in the connecting hole after penetrating the protection piece.

[0019] As one of the optional embodiments of the present application, the protection piece comprises a window part and a frame part connected with each other, the frame part surrounds the outer periphery of the window part, and the frame part is connected with the mounting surface. In the first direction, the thickness of the frame part is greater than the thickness of the window part.

[0020] The thickness of the frame part is slightly thick, which ensures that the frame part will not be damaged under the extrusion of the base, ensures the reliability and stability of the position of the protection piece, and at the same time, the window part is more easily broken by pressure, ensuring the smoothness of gas discharge.

[0021] On the other hand, the present application also provides a battery pack comprising the single battery.

[0022] One of the technical solutions has the following advantages or beneficial effects: when the first connecting part and the second connecting part are connected, the flip cover seals the pressure relief port, the protection assembly forms overall protection for the explosion-proof hole, avoids external sharp objects from touching the explosion-proof valve or debris and other sundries from falling on the explosion-proof valve, thereby reducing the influence of the external environment, effectively protecting the explosion-proof valve, and ensuring the safety performance of the single battery. BRIEF DESCRIPTION OF DRAWINGS

[0023] The technical solutions and other beneficial effects of the present application will be apparent from the following detailed description of the specific embodiments of the present application in conjunction with the accompanying drawings.

[0024] Figure 1 is a whole structure diagram provided by the embodiments of the present application;

[0025] Figure 2 is an explosion structure diagram provided by the embodiments of the present application;

[0026] Figure 3 is an explosion structure diagram provided by the embodiments of the present application for showing the protection assembly and the explosion-proof valve;

[0027] Figure 4 is a sectional view provided by the embodiments of the present application for showing the protection assembly and the explosion-proof valve;

[0028] Figure 5 FIG. 6 is a cross-sectional view of another cross-section of the protection assembly according to an embodiment of the present application;

[0029] Figure 6 FIG. 7 is a schematic view of a flip rotation structure according to an embodiment of the present application.

[0030] Label: 1, housing; 10, accommodating cavity; 100, opening;

[0031] 2, cover plate; 20, explosion-proof hole; 200, mounting surface; 2a, fitting groove;

[0032] 3, explosion-proof valve;

[0033] 4, protection assembly; 41, base; 41a, boss; 411, mounting hole; 410, pressure relief port; 42, flip; 42a, avoiding groove; 421, rotation shaft;

[0034] 51, first connecting portion; 52, second connecting portion;

[0035] 61, connecting hole; 62, connecting shaft;

[0036] 7, protection piece; 71, window portion; 72, frame portion;

[0037] 8, electrode assembly; 81, core body; 82, positive pole lug; 83, negative pole lug;

[0038] 92, positive pole column; 93, negative pole column;

[0039] Z, first direction; X, second direction; Y, third direction. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person skilled in the art without creative work fall within the scope of protection of the present application.

[0041] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the term "and / or" in the present application is only to describe the association relationship of the associated objects, which means that there can be three kinds of relationships, for example, A and / or B can mean that there are three cases of A alone, A and B together, and B alone. In addition, the character " / " in the present application generally represents an "or" relationship between the front and rear associated objects, unless otherwise specified.

[0042] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person skilled in the art without creative work fall within the scope of protection of the present application. Figures 1-6Further description is made to the present application.

[0043] Referring to Figure 1 and Figure 2 The present application provides a single battery, having a first direction Z, a second direction X and a third direction Y intersecting. In some examples, the first direction Z, the second direction X and the third direction Y constitute a spatial rectangular coordinate system.

[0044] The single battery comprises a shell 1, a cover plate 2 and an electrode assembly 8 arranged in the shell 1.

[0045] The shell 1 is arranged in a square shape, and the shell 1 has a receiving cavity 10 with an opening 100 at one end in the first direction Z; the cover plate 2 is connected to the opening 100 of the shell 1 in the first direction Z to cover the receiving cavity 10, and in one example, the cover plate 2 is welded to the side of the opening 100.

[0046] The electrode assembly 8 is arranged in the receiving cavity 10. The electrode assembly 8 is formed by laminating or winding the positive electrode sheet, the negative electrode sheet and the separator. The electrode assembly 8 comprises a core 81, a positive electrode tab 82 and a negative electrode tab 83. The positive electrode tab 82 and the negative electrode tab 83 are integrally connected to the core 81 respectively, and the positive electrode tab 82 and the negative electrode tab 83 are located on the side of the core 81 facing the cover plate 2. Correspondingly, a positive electrode post 92 and a negative electrode post 93 are arranged on the cover plate 2, and the positive electrode post 92 and the positive electrode tab 82 are electrically connected, and the negative electrode post 93 and the negative electrode tab 83 are electrically connected. Optionally, the electrode tab and the electrode post are welded.

[0047] Referring to Figure 3 and Figure 4 The cover plate 2 further comprises an explosion-proof hole 20 and an explosion-proof valve 3. The explosion-proof hole 20 is arranged in the middle of the cover plate 2 and between the positive electrode post 92 and the negative electrode post 93 in the second direction X. The explosion-proof hole 20 is arranged in a racetrack shape and penetrates the cover plate 2 in the first direction Z, and the explosion-proof valve 3 is connected to the cover plate 2 to cover the explosion-proof hole 20.

[0048] It can be understood that the explosion-proof valve 3 is a component for discharging gas in the case of battery thermal runaway, and the internal gas pressure of the battery increases to break the explosion-proof valve 3 to quickly release the pressure and reduce the risk of explosion, thereby ensuring the safety performance of the battery. In some examples, the explosion-proof valve 3 can be formed by opening a notch on a metal plate, and the notch can be an indentation. The notch forms a weak area, and when the battery is in thermal runaway, the gas impacts the explosion-proof valve 3, and the explosion-proof valve 3 breaks at the notch to discharge the gas in the battery.

[0049] In an optional embodiment, the cover plate 2 has a mounting surface 200 facing away from the accommodating cavity 10, and the explosion-proof valve 3 is connected to the side of the cover plate 2 facing away from the mounting surface 200. Specifically, the side of the cover plate 2 facing away from the mounting surface 200 is provided with a fitting groove 2a, which is arranged around the explosion-proof hole 20 and communicates with the explosion-proof hole 20, and the edge of the explosion-proof valve 3 is embedded in the fitting groove 2a. This makes part of the explosion-proof hole 20 and the accommodating cavity 10 spaced apart in the first direction Z.

[0050] It should be noted that the position of the explosion-proof valve 3 is not specifically limited. For example, the fitting groove 2a is not provided on the cover plate 2, and the explosion-proof valve 3 is directly welded to the side of the cover plate 2 facing away from the mounting surface 200; or the explosion-proof valve 3 is welded to the hole wall of the explosion-proof hole 20.

[0051] It can be understood that by providing the fitting groove 2a, the installation position of the explosion-proof valve 3 can be accurately defined, providing a more accurate positioning reference for the operator or the machine during installation, facilitating installation and welding operation. Moreover, the fitting groove increases the contact area between the explosion-proof valve 3 and the cover plate 2, thereby ensuring the reliability of the welding.

[0052] Referring to Figure 3 and Figure 4 , the single battery further comprises a protection assembly 4, the protection assembly 4 comprising a base 41 and a cover 42, the base 41 being connected to the mounting surface 200 and being provided with a through pressure relief opening 410 in the first direction Z, the pressure relief opening 410 corresponding to the explosion-proof hole 20, and the cover 42 being rotatably connected to the base 41; wherein the base 41 is provided with a first connecting portion 51, the cover 42 is provided with a second connecting portion 52, the first connecting portion 51 is connected to the second connecting portion 52, and the cover 42 covers the pressure relief opening 410.

[0053] It should be noted that the pressure relief opening 410 corresponding to the explosion-proof hole 20 means that the projection of the pressure relief opening 410 on the plane of the mounting surface 200 at least partially overlaps the projection of the explosion-proof hole 20 on the plane of the mounting surface 200. In some examples, the pressure relief opening 410 completely covers the explosion-proof hole 20, i.e. the projection of the explosion-proof hole 20 on the plane of the mounting surface 200 is within the area defined by the projection of the pressure relief opening 410 on the plane of the mounting surface 200.

[0054] The above technical solutions are implemented, when the first connecting portion 51 is connected to the second connecting portion 52, the cover 42 covers the pressure relief opening 410, the protection assembly 4 forms overall protection for the explosion-proof hole 20, avoiding external sharp objects touching the explosion-proof valve 3 or debris and other sundries falling onto the explosion-proof valve 3, thereby reducing the influence of the external environment, effectively protecting the explosion-proof valve 3, and ensuring the safety performance of the single battery.

[0055] Meanwhile, due to the structural design of the protection assembly 4, when the first connecting part 51 and the second connecting part 52 are detached, the flip cover 42 is in an open state, and an operator can open the flip cover 42 at any time to observe the condition of the explosion-proof valve 3, so that the explosion-proof valve 3 can be conveniently monitored on the basis of protecting the explosion-proof valve 3, and use is more flexible.

[0056] With reference to Figure 4 and Figure 5 , as one of the optional embodiments of the present application, one end of the flip cover 42 along the third direction Y is rotationally connected with the base 41, and the second connecting part 52 is arranged at the other end of the flip cover 42 along the third direction Y.

[0057] One end of the flip cover 42 along the second direction X is provided with a rotating shaft 421, and one end of the base 41 away from the mounting surface 200 is provided with a mounting hole 411, and the rotating shaft 421 is located in the mounting hole 411. Specifically, with reference to Figure 6 , one end of the base 41 along the second direction X is provided with a boss 41a, the boss 41a is protruded from the top surface of the base 41, the top of the boss 41a is provided in an arc shape to facilitate the flipping of the flip cover 42, and the mounting hole 411 penetrates through the boss 41a along the second direction X. An avoiding groove 42a is arranged at one end of the flip cover 42 close to the boss 41a, and the rotating shaft 421 is fixed in the avoiding groove 42a, and both ends of the rotating shaft 421 are respectively fixedly connected to the inner walls of the avoiding groove 42a at both ends along the second direction X. The rotating shaft 421 is rotationally fitted in the mounting hole 411, so as to realize the flipping of the flip cover 42.

[0058] With reference to Figure 5 , as one of the optional embodiments of the present application, the first connecting part 51 is arranged on the side of the base 41 away from the mounting surface 200, the first connecting part 51 is a plug-in hole, and the first connecting part 51 is recessed in the direction close to the mounting surface 200 along the first direction Z; the second connecting part 52 is arranged on the side of the flip cover 42 facing the base 41, and the second connecting part 52 is arranged in a protruding manner, the second connecting part 52 is protruded in the direction close to the base 41 along the first direction Z, and the second connecting part 52 is clamped in the first connecting part 51.

[0059] In the embodiments of the present application, a specific structure of the connection between the flip cover 42 and the base 41 is provided. The flip cover 42 realizes the open and closed states through the clamping and fitting of the first connecting part 51 and the second connecting part 52, which is simple in structure, convenient in production and processing, and easy to operate.

[0060] It should be noted that the second connecting part 52 and the first connecting part 51 can be gap clamping and fitting, that is, there is no connection relationship between the first connecting part 51 and the second connecting part 52, and the flip cover 42 is only covered on the base 41 by gravity. At this time, the single battery needs to be used in some relatively stable scenes, and needs to be kept upright, that is, the protection assembly 4 is located at the top of the single battery in the direction of gravity.

[0061] Or in some examples, the second connecting part 52 and the first connecting part 51 can also be an interference fit, at this time the first connecting part 51 and the second connecting part 52 form a connection relationship through friction, the flip cover 42 can be more reliable to cover on the base 41, at this time the single battery can also cope with some unstable use scenarios. And the single battery can be inverted during transportation. In the example, optionally, the second connecting part 52 can be an elastic component. When the battery is in thermal runaway, the gas can directly blow off the explosion-proof valve 3 and the flip cover 42 to release pressure.

[0062] It should be noted that the connection relationship between the first connecting part 51 and the second connecting part 52 is not limited to the above two.

[0063] For example, as one of the optional embodiments of the present application, the first connecting part 51 is provided as a first magnetic attraction member on the base 41, and the second connecting part 52 is provided as a second magnetic attraction member on the flip cover 42, and the first connecting part 51 and the second connecting part 52 are magnetically attracted to each other. Specifically, mounting grooves are provided on the opposite sides of the base 41 and the flip cover 42, respectively, and the first magnetic attraction member and the second magnetic attraction member are embedded in the mounting grooves on the base 41 and the flip cover 42, respectively. Optionally, the first magnetic attraction member and the second magnetic attraction member are provided as magnets with opposite magnetic properties, or one of the first magnetic attraction member and the second magnetic attraction member is a magnet, and the other is a ferromagnetic material that can be attracted by the magnet, such as metallic iron or iron-containing alloy, etc. Another specific structure of the connection between the flip cover 42 and the base 41 is proposed in the embodiment of the present application. The opening and closing states are achieved by magnetic attraction, the connection is stable and reliable, the production and processing are simple, the gas can directly blow off the flip cover 42 for exhaust when thermal runaway, and the use process is more flexible and convenient.

[0064] For example, as one of the optional embodiments of the present application, the first connecting part 51 is provided as a screw penetrating through the flip cover 42 along the first direction Z, and the second connecting part 52 is provided as a threaded hole, and the first connecting part 51 and the second connecting part 52 form a bolt connection. When the screw is screwed with the threaded hole, the flip cover 42 is fixed with the base 41, and the flip cover 42 is in a closed state, and when the screw is unscrewed, the worker can turn over the flip cover 42 to achieve an open state. In the embodiment of the present application, the first connecting part 51 and the second connecting part 52 need to be disassembled when the single battery is in use, and when the battery is in thermal runaway, the gas will blow off the explosion-proof valve 3 and the flip cover 42 to release pressure. The first connecting part 51 and the second connecting part 52 can be locked during transportation to ensure the protection of the explosion-proof valve 3.

[0065] Back to Figure 3 And Figure 4As one of the optional embodiments of the present application, the mounting surface 200 is provided with a connecting hole 61 recessed in the direction close to the accommodating cavity 10 along the first direction Z, the base 41 is provided with a connecting shaft 62 protruding in the direction close to the accommodating cavity 10 along the first direction Z, and the connecting shaft 62 is snap-fitted in the connecting hole 61. Specifically, four connecting holes 61 are arranged along the circumference of the explosion-proof hole 20, and the connecting shaft 61 corresponds to the connecting hole 62 one by one. When the base 41 is installed and fixed, the connecting shaft 62 is first inserted into the connecting hole 61 to position the base 41, and then welding or bonding is performed. The snap-fitting of the connecting shaft 62 and the connecting hole 61 can quickly and accurately position the installation position of the base 41, improving the convenience and accuracy of the installation of the base 41.

[0066] It should be noted that in some optional examples, the material of the connecting shaft 62 is an elastic material, such as elastic plastic, and the connecting shaft 62 is snap-fitted in the connecting hole 61 with interference. In this embodiment, the interference fit between the connecting shaft 62 and the connecting hole 61 can fix the base 41, which eliminates the need for welding or bonding of the base 41, further improving the convenience of installing the base 41, and the interference fit design in this embodiment allows the base 41 to be easily removed from the cover plate 2, making it more flexible to use. When the single battery is in a scenario that needs protection, such as during transportation or in an unstable storage environment, the protection assembly 4 is temporarily fixed to the cover plate 2 by the interference fit between the connecting shaft 62 and the connecting hole 61; when the single battery is in a stable external environment with little impact, such as when preparing to pack the battery pack, the protection assembly 4 can be removed from the cover plate 2, reducing the impact of the weight and volume of the protection assembly 4 on the energy density of the battery pack.

[0067] In some optional embodiments, the connecting shaft 62 is a plastic shaft, and the connecting shaft 62 can also be heat-fused into the connecting hole 61. When assembling the protection assembly 4, the connecting shaft 62 of the base 41 is inserted into the connecting hole 61, and then the cover plate 2 is heated to a set temperature, which is the melting temperature of plastic, generally 100-200°C. The connecting shaft 62 is melted in the connecting hole 61, thereby achieving fixed connection of the base 41 and the cover plate 2.

[0068] Back to Figure 3 , Figure 4 and Figure 5 As one of the optional embodiments of the present application, the single battery further comprises a protection piece 7 arranged on the mounting surface 200, the protection piece 7 covers the explosion-proof hole 20, and the protection piece 7 is located between the explosion-proof valve 3 and the base 41 along the first direction Z.

[0069] The protection piece 7 provides an additional protection outside the protection assembly 4, and cooperates with the protection assembly 4 to form double protection. In addition, the protection piece 7 is arranged between the cover plate 2 and the base 41, and the base 41 is used to press the protection piece 7 on the cover plate 2, so that the sealing performance is improved. The protection piece 7 seals the communication channel between the explosion-proof hole 20 and the outside, reduces the entry of external water vapor or oil mist into the explosion-proof hole 20 to contact the explosion-proof valve 3, and further reduces the influence of the external environment. Optionally, the protection piece 7 is arranged as a transparent plate, which provides more stable protection on the basis of the visual function.

[0070] As one of the optional embodiments of the present application, in the first direction Z, the protection piece 7 covers the connecting hole 61, and the connecting shaft 62 is clamped and matched in the connecting hole 61 after penetrating the protection piece 7. Specifically, the protection piece 7 includes a window part 71 and a frame part 72 connected with each other, the frame part 72 surrounds the outer periphery of the window part 71, and the frame part 72 is arranged between the mounting surface 200 and the base 41. In the first direction Z, the thickness of the frame part 72 is greater than the thickness of the window part 71.

[0071] The thickness of the frame part 72 is slightly thick, which ensures that the frame part 72 will not be damaged under the extrusion of the base 41, and ensures the reliability and stability of the position of the protection piece 7. At the same time, the window part 71 is more easily broken by pressure, which ensures the smoothness of gas discharge.

[0072] In addition, the present application also provides a battery pack including the single battery.

[0073] The above is only part of the embodiments of the present application, and does not limit the scope of the application. Any skilled person in the art can easily think of simple modifications, equivalent changes and modifications within the scope of the present application, which should be covered within the scope of the present application.

Claims

1. A single-cell battery, characterized in that, Having a first orientation (Z), the single cell includes: The housing (1) has a receiving cavity (10); A cover plate (2) is connected to one end of the housing (1) along the first direction (Z), the cover plate (2) covers the receiving cavity (10), and the cover plate (2) has a mounting surface (200) that is away from the receiving cavity (10) along the first direction (Z); An explosion-proof valve (3) is provided with a through explosion-proof hole (20) on the cover plate (2) along the first direction (Z). The explosion-proof valve (3) is connected to the side of the cover plate (2) away from the mounting surface (200). The explosion-proof valve (3) covers the explosion-proof hole (20). The protective component (4) includes a base (41) and a flip cover (42). The base (41) is connected to the mounting surface (200). A through pressure relief port (410) is provided on the base (41) along the first direction (Z). The pressure relief port (410) corresponds to the explosion-proof hole (20). The flip cover (42) is connected to the base (41). The base (41) is provided with a first connecting part (51), and the flip cover (42) is provided with a second connecting part (52). The first connecting part (51) is connected to the second connecting part (52) so that the flip cover (42) covers the pressure relief port (410).

2. The single-cell battery as described in claim 1, characterized in that, The single battery cell also has a third direction (Y) intersecting the first direction (Z), and the flip cover (42) is connected to the base (41) at one end along the third direction (Y), and the second connecting part (52) is disposed at the other end of the flip cover (42) along the third direction (Y).

3. The single-cell battery as described in claim 1, characterized in that, The first connecting part (51) is disposed at the end of the base (41) away from the mounting surface (200). The first connecting part (51) is a plug hole. The first connecting part (51) is recessed in the direction close to the mounting surface (200) along the first direction (Z). The second connecting part (52) is disposed on the side of the flip cover (42) near the mounting surface (200). The second connecting part (52) is configured as a protrusion. The second connecting part (52) protrudes in the direction of the first direction (Z) towards the mounting surface (200). The second connecting part (52) is engaged in the first connecting part (51).

4. The single-cell battery as described in claim 1, characterized in that, The first connecting part (51) is configured as a first magnetic attraction member on the base (41), and the second connecting part (52) is configured as a second magnetic attraction member on the flip cover (42). The first connecting part (51) and the second connecting part (52) are magnetically attracted to each other.

5. The single-cell battery as described in claim 1, characterized in that, The flip cover (42) is provided with a pivot (421), and the base (41) is provided with a mounting hole (411) at one end away from the mounting surface (200), and the pivot (421) is located in the mounting hole (411).

6. The single-cell battery as described in claim 1, characterized in that, The mounting surface (200) is provided with a connecting hole (61), the connecting hole (61) is recessed in the direction of the first direction (Z) toward the receiving cavity (10), the base (41) is provided with a connecting shaft (62) at the end near the mounting surface (200), the connecting shaft (62) is protruded in the direction of the first direction (Z) toward the receiving cavity (10), and the connecting shaft (62) is disposed in the connecting hole (61).

7. The single-cell battery as described in claim 6, characterized in that, The single battery also includes a protective component (7), which is connected to the mounting surface (200) along the first direction (Z). The protective component (7) is located between the base (41) and the mounting surface (200) and covers the explosion-proof hole (20). The protective component (7) and the explosion-proof valve (3) are spaced apart along the first direction (Z).

8. The single-cell battery as described in claim 7, characterized in that, In the first direction (Z), the protective member (7) covers the connecting hole (61), and the connecting shaft (62) passes through the protective member (7) and is located in the connecting hole (61).

9. The single-cell battery as described in claim 7, characterized in that, The protective element (7) includes a window portion (71) and a frame portion (72) connected to each other. The frame portion (72) surrounds the outer periphery of the window portion (71) and is connected to the mounting surface (200). The thickness of the frame portion (72) in the first direction (Z) is greater than the thickness of the window portion (71).

10. A battery pack, characterized in that, include: The single-cell battery as described in any one of claims 1-9.

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