Battery

Abstract

The utility model provides a battery, and relates to the technical field of energy storage devices. The battery comprises a shell, an electrode assembly and a gas outlet piece, the containing cavity of the shell can be used for containing and installing the electrode assembly, and the air outlet piece is movably arranged on the shell, so that the relative position relation of the shell and the movable piece is adjustable. The second air hole in the air outlet piece can move to be at least partially opposite to the first air hole in the shell, so that the first air hole can be communicated with the second air hole. In this way, the containing cavity of the shell can be communicated with the outside through the first air hole and the second air hole, gas generated by the electrode assembly in the shell can be exhausted through the first air hole and the second air hole, and it is avoided that the gas is accumulated in the containing cavity of the shell and influences the electrode assembly. The second air hole can move to be staggered with the first air hole in the shell, so that the first air hole and the second air hole are disconnected, the battery can be sealed in the accommodating cavity of the shell, and the shell can fully protect the electrode assembly. Therefore, the battery is safe and reliable to use.

Description

Technical Field

[0001] The present application relates to a battery, and belongs to the technical field of energy storage devices. Background Art

[0002] During the charge and discharge process of power batteries, the negative electrode material and the electrolyte react to produce gas. If the gas cannot be removed and accumulates inside the battery, the accumulated gas will cause the internal pressure of the battery to increase, and it will also occupy the electrolyte space and increase the ion transmission path, thereby causing safety risks such as premature valve opening, lithium deposition and even internal short circuit, which will lead to poor battery reliability.

[0003] At present, in order to solve the problem of battery gas production, the battery is prepared by selecting positive and negative electrode materials and electrolytes with low gas production. However, the above-mentioned battery will still accumulate a certain amount of gas, thereby reducing the reliability of the battery. Utility Model Content

[0004] The present application provides a battery that solves the problem of low reliability of batteries due to gas production in related technologies.

[0005] The present application provides a battery, comprising:

[0006] A shell having a cavity, wherein a first air hole communicating with the cavity is formed on the shell;

[0007] an electrode assembly, disposed in the cavity; and

[0008] An air outlet member is provided with a second air hole, and the air outlet member is movably arranged on the shell;

[0009] Wherein, the air outlet piece has a first position state and a second position state relative to the shell. When the air outlet piece is in the first position state, the first air hole is misaligned with the second air hole. When the air outlet piece is in the second position state, at least part of the first air hole is opposite to the second air hole.

[0010] In some embodiments, the shell is provided with a mounting groove, the opening of the first air hole is located at the bottom wall of the mounting groove, and the air outlet piece is embedded in the mounting groove.

[0011] In some embodiments, the shell includes a bottom shell and an upper cover, the bottom shell has an opening, the upper cover is arranged on the opening so that the upper cover and the bottom shell are arranged to form the cavity, the mounting groove is opened on the upper cover, and the upper cover is also opened with an injection hole, and the injection hole is connected to the cavity.

[0012] In some embodiments, the air outlet member is rotatably disposed in the mounting groove, and the air outlet member is rotatable to the first position state or the second position state.

[0013] In some embodiments, the aperture of the first air hole is consistent with the aperture of the second air hole, the second position state includes a first sub-position state and a second sub-position state, when the air outlet piece is in the first sub-position state, part of the first air hole is opposite to the second air hole, and when the air outlet piece is in the second sub-position state, the first air hole is completely opposite to the second air hole.

[0014] In some embodiments, the number of the first air holes and the number of the second air holes are both plural, and the plurality of the first air holes and the plurality of the second air holes are spaced apart along the rotation direction of the air outlet member, and the plurality of the second air holes and the plurality of the first air holes can be opposite or staggered one by one.

[0015] In some embodiments, the air outlet member is provided with a rotation groove, and the groove opening of the rotation groove faces away from the shell.

[0016] In some embodiments, the plurality of first air holes are further distributed at intervals along the radial direction of the air outlet member, and / or the plurality of second air holes are further distributed at intervals along the radial direction of the air outlet member.

[0017] In some embodiments, the air outlet piece has a buckle portion, the shell has a buckle slot, and the buckle portion is buckled into the buckle slot.

[0018] In some embodiments, a gas permeable membrane is further included, wherein the gas permeable membrane is disposed on the gas outlet member and / or the housing, and in the direction from the housing to the gas outlet member, the gas permeable membrane is located between the first air hole and the second air hole;

[0019] The gas permeable membrane is at least one of a polytetrafluoroethylene membrane, a polyetherimide membrane, a polypropylene membrane, a polydimethylsiloxane membrane, and a polyester membrane.

[0020] In the battery provided by the present application, the cavity of the shell can be used to place and install the electrode assembly, and the gas outlet member is movably arranged on the shell, so that the relative position relationship between the shell and the movable member can be adjusted. The second air hole on the gas outlet member can be moved to be opposite to at least part of the first air hole on the shell, so that the first air hole and the second air hole can be connected. In this way, the cavity of the shell can be connected to the outside through the first air hole and the second air hole, and the gas generated by the electrode assembly in the shell can be discharged through the first air hole and the second air hole, so as to avoid the gas accumulation in the cavity of the shell and affect the electrode assembly. The second air hole can be moved to be misaligned with the first air hole on the shell, so that the first air hole and the second air hole are disconnected, so that external impurities can be prevented from entering the cavity of the shell through the first air hole and the second air hole, and the electrode assembly in the shell is prevented from being damaged, so that the battery of the present application is safe and reliable to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and other purposes, features and advantages of the embodiments of the present application will become more easily understood through the following detailed description with reference to the accompanying drawings. In the accompanying drawings, multiple embodiments of the present application will be described in an exemplary and non-limiting manner, wherein:

[0022] Figure 1 A schematic diagram of a battery according to an embodiment of the present application;

[0023] Figure 2 A schematic top view of a battery according to an embodiment of the present application;

[0024] Figure 3 A schematic diagram of the internal structure of a battery according to an embodiment of the present application;

[0025] Figure 4 Schematic diagram of the upper cover of the battery according to an embodiment of the present application.

[0026] Reference numerals:

[0027] 100-shell, 110-cavity, 120-first air hole, 130-installation groove, 140-bottom shell, 150-upper cover, 160-card slot, 170-liquid injection hole,

[0028] 200-electrode assembly,

[0029] 300-air outlet, 310-second air hole, 320-buckle portion, 330-rotation groove,

[0030] 400-Seals,

[0031] 500-Gas permeable membrane. DETAILED DESCRIPTION

[0032] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0033] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0035] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0036] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0037] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0038] During the charge and discharge process of power batteries, the negative electrode material and the electrolyte react to produce gas. If the gas cannot be removed and accumulates inside the battery, the accumulated gas will cause the internal pressure of the battery to increase, and it will also occupy the electrolyte space and increase the ion transmission path, thereby causing safety risks such as premature valve opening, lithium deposition and even internal short circuit, which will lead to poor battery reliability.

[0039] At present, in order to solve the problem of battery gas production, the battery is prepared by selecting positive and negative electrode materials and electrolytes with low gas production. However, the above-mentioned battery will still accumulate a certain amount of gas, thereby reducing the reliability of the battery.

[0040] In the battery proposed in the present application, the cavity of the shell can be used to place and install the electrode assembly, and the gas outlet piece is movably arranged on the shell, so that the relative position relationship between the shell and the movable piece can be adjusted. The second air hole on the gas outlet piece can be moved to be opposite to at least part of the first air hole on the shell, so that the first air hole and the second air hole can be connected. In this way, the cavity of the shell can be connected to the outside through the first air hole and the second air hole, and the gas generated by the electrode assembly in the shell can be discharged through the first air hole and the second air hole, so as to avoid the gas accumulation in the cavity of the shell and affect the electrode assembly. The second air hole can be moved to be misaligned with the first air hole on the shell, so that the first air hole and the second air hole are disconnected, so as to avoid external impurities from entering the cavity of the shell through the first air hole and the second air hole, and prevent the electrode assembly in the shell from being damaged, so that the battery of the present application is safe and reliable to use.

[0041] The battery provided in this application is described in detail below in conjunction with specific embodiments.

[0042] The present application embodiment proposes a battery, referring to Figures 1 to 3 As shown, it includes a housing 100, an electrode assembly 200 and a gas outlet 300. The battery can be used as a power battery in a car or in other electrical devices, which is not limited in the present application.

[0043] Among them, the shell 100 is the basic component of the battery of the present application. The shell 100 can provide an installation basis for at least some of the other components of the battery and protect at least some of the other components. The shell 100 can be made of metal material, so that the shell 100 has better structural strength, thereby making the durability and reliability of the shell 100 better. Of course, the shell 100 can also be made of corrosion-resistant polymer materials, so that the shell 100 has a certain structural strength and is relatively light in weight. The shell 100 has a cavity 110, and the cavity 110 in the shell 100 can be used to install at least some of the other components of the battery pack.

[0044] The electrode assembly 200 is disposed in the cavity 110 of the shell 100, and the outer dimensions of the electrode assembly 200 can be set to match the cavity dimensions of the cavity 110 of the shell 100. Specifically, the dimensions of the cavity 110 of the shell 100 can be set to be slightly larger than the dimensions of the electrode assembly 200, so that when the electrode assembly 200 is disposed in the cavity 110 of the shell 100, there is a small gap between the outer wall of the electrode assembly 200 and the inner wall of the shell 100, so that the electrode assembly 200 can be conveniently installed in the cavity 110 of the shell 100, and the inner wall of the cavity 110 of the shell 100 can also serve to limit the electrode assembly 200, so that the electrode assembly 200 remains stable when disposed in the cavity 110 of the shell 100.

[0045] The air outlet member 300 is movably arranged on the housing 100, so that the air outlet member 300 can move relative to the housing 100, so that the relative position relationship between the air outlet member 300 and the housing 100 can be adjusted. The housing 100 is provided with a first air hole 120, and the first air hole 120 of the housing 100 is communicated with the cavity 110. Specifically, the first air hole 120 of the housing 100 is a through hole opened on the surface of the housing 100, and the cavity 110 of the housing 100 can be communicated with the outside of the housing 100 through the first air hole 120. The air outlet member 300 is provided with a second air hole 310, and the second air hole 310 is a through hole structure that penetrates the air outlet member 300. The air outlet member 300 can move relative to the housing 100, so that the second air hole 310 of the air outlet member 300 can move relative to the first air hole 120 of the housing 100, and then the air outlet member 300 can switch between the first position state and the second position state.

[0046] When the gas outlet member 300 moves to the first position relative to the shell 100, the first air hole 120 of the shell 100 is misaligned with the second air hole 310 of the gas outlet member 300, so that the solid structure part of the gas outlet member 300 without the second air hole 310 can be blocked with the first air hole 120 of the shell 100, so that the first air hole 120 is disconnected from the second air hole 310. Accordingly, the cavity 110 of the shell 100 is disconnected from the outside of the shell 100, so that the electrode assembly 200 disposed in the cavity 110 of the shell 100 can be enclosed in the cavity 110, and external impurities cannot enter the cavity 110, so that the shell 100 fully protects the electrode assembly 200.

[0047] When the gas outlet member 300 moves to the second position state relative to the shell 100, at least part of the first air hole 120 of the shell 100 is opposite to the second air hole 310 of the gas outlet member 300, so that the first air hole 120 and the second air hole 310 can be communicated, so that the cavity 110 of the shell 100 can be communicated with the outside of the shell 100 through the first air hole 120 and the second air hole 310. When the electrode assembly 200 generates gas in the cavity 110 of the shell 100, the gas can be discharged to the outside of the shell 100 through the first air hole 120 and the second air hole 310, so that the gas will not accumulate in the cavity 110 of the shell 100, so that the gas pressure in the cavity 110 is maintained at a normal level, and the gas is prevented from affecting the electrode assembly 200, so as to achieve the purpose of protecting the electrode assembly 200.

[0048] Specifically, when the electrode assembly 200 generates a large amount of gas, the gas outlet member 300 can be controlled to be in the second position state so that the gas generated by the electrode assembly 200 can be discharged. When the electrode assembly 200 does not generate gas or generates a small amount of gas, the gas outlet member 300 is controlled to be in the first position state to fully protect the electrode assembly 200.

[0049] In some embodiments, reference Figure 3 and Figure 4 As shown, the housing 100 of the present application may be provided with a mounting groove 130, and the air outlet member 300 may be embedded in the mounting groove 130 of the housing 100. Accordingly, the first air hole 120 of the housing 100 may be disposed in the mounting groove 130, so that the first air hole 120 may be opposite to the second air hole 310 of the air outlet member 300. The outer dimensions of the air outlet member 300 may be set to match the groove dimensions of the mounting groove 130 of the housing 100. Specifically, the size of the mounting groove 130 can be set to be slightly larger than the size of the gas outlet member 300, so that when the gas outlet member 300 is set in the mounting groove 130 of the housing 100, there is a small gap between the outer wall of the gas outlet member 300 and the inner wall of the mounting groove 130, so that the gas outlet member 300 can be easily installed in the mounting groove 130 of the housing 100, and the inner wall of the mounting groove 130 can also serve to limit the gas outlet member 300, so that the gas outlet member 300 remains stable when it is set in the mounting groove 130 of the housing 100. In addition, the gas outlet member 300 is set in the mounting groove 130 of the housing 100, and at least part of the gas outlet member 300 can be covered by the housing 100, so that the sealing between the housing 100 and the gas outlet member 300 is better.

[0050] The mounting groove 130 of the housing 100 may be specifically disposed on one side of the top of the housing 100. Accordingly, the cavity 110 of the housing 100 is located on one side of the bottom of the mounting groove 130, and the gas outlet member 300 is located on one side of the top of the housing 100. The first air hole 120 of the housing 100 may be disposed on one side of the bottom of the mounting groove 130 of the housing 100, so that the first air hole 120 may be conveniently communicated with the cavity 110 of the housing 100. Accordingly, the first air hole 120 of the housing 100 is communicated with one side of the top of the cavity 110. When the electrode assembly 200 generates gas in the cavity 110, the gas may be discharged more efficiently through the first air hole 120 at the top of the cavity 110.

[0051] In some embodiments, reference Figure 1 As shown, the housing 100 of the present application may be specifically provided to include a bottom shell 140 and an upper cover 150, the bottom shell 140 being a component with an opening, and the upper cover 150 being provided at the opening of the bottom shell 140, so that the upper cover 150 can be blocked at the opening of the bottom shell 140. The upper cover 150 and the bottom shell 140 are arranged to form a cavity 110. In this way, when preparing the housing 100, the bottom shell 140 and the upper cover 150 may be prepared separately, and then the bottom shell 140 and the upper cover 150 may be assembled to form the housing 100, so as to reduce the difficulty of the preparation process of the housing 100. The upper cover 150 may be provided at one side of the top of the bottom shell 140, and accordingly, the mounting groove 130 of the housing 100 may be opened at the upper cover 150. In this way, the upper cover 150 may be assembled with the bottom shell 140 after the mounting groove 130 is processed on the upper cover 150, so as to further reduce the difficulty of the preparation process of the housing 100.

[0052] The upper cover 150 is also provided with a liquid injection hole 170, which is in communication with the cavity 110 of the shell 100. The liquid injection hole 170 is a through-hole structure provided in the upper cover 150, so that the cavity 110 of the shell 100 can also be in communication with the outside of the shell 100 through the liquid injection hole 170. When preparing the battery of the present application, after the electrode assembly 200 is installed in the cavity 110 of the shell 100, it is also necessary to inject electrolyte into the cavity 110. Therefore, electrolyte can be injected into the cavity 110 of the shell 100 through the liquid injection hole 170 on the upper cover 150, and the liquid injection hole 170 can be blocked after the electrolyte injection is completed.

[0053] In some embodiments, reference Figures 1 to 3As shown, the air outlet member 300 of the present application is rotatably arranged in the mounting groove 130 of the housing 100, so that the air outlet member 300 can rotate relative to the housing 100, so that the air outlet member 300 can switch between the first position state and the second position state by rotation. The air outlet member 300 can be set as a disc structure, and the groove type of the mounting groove 130 of the housing 100 can be set as a cylindrical groove matching the air outlet member 300, so that the air outlet member 300 can rotate in the mounting groove 130. The circumferential outer wall of the air outlet member 300 can be set to contact with the inner wall of the mounting groove 130, and the circumferential outer wall of the air outlet member 300 can rotate along the inner wall of the mounting groove 130. In this way, when the air outlet member 300 rotates, the inner wall of the mounting groove 130 can limit the air outlet member 300, so that the air outlet member 300 can always rotate around the center of the air outlet member 300, thereby making the air outlet member 300 switch between the first position state and the second position state more accurate.

[0054] Specifically, when the gas outlet member 300 is in the first position state, the gas outlet member 300 can be set to rotate in the clockwise direction or counterclockwise direction to the second position state, and the gas outlet member 300 continues to rotate in the original rotation direction so that the gas outlet member 300 switches to the first position state again. Alternatively, when the gas outlet member 300 is in the first position state, the gas outlet member 300 can be set to rotate in the clockwise direction or counterclockwise direction to the second position state, and the gas outlet member 300 rotates so that the gas outlet member 300 switches to the first position state again, so that the gas outlet member 300 can be efficiently switched between the first position state and the second position state.

[0055] In addition, in other embodiments, the air outlet member 300 may be movably arranged in the mounting groove 130 of the housing 100, so that the air outlet member 300 can be moved relative to the housing 100, so that the air outlet member 300 can be switched between the first position state and the second position state by moving. The air outlet member 300 can be set as a strip structure, and the groove type of the mounting groove 130 of the housing 100 can be set as a strip groove matching the air outlet member 300, so that the air outlet member 300 can move in the mounting groove 130. The two opposite outer walls of the air outlet member 300 can be set to contact the inner wall of the mounting groove 130, and the two outer walls of the air outlet member 300 can move along the inner wall of the mounting groove 130. In this way, when the air outlet member 300 moves, the inner wall of the mounting groove 130 can limit the air outlet member 300, so that the air outlet member 300 can always move along the extension direction of the mounting groove 130, thereby making the air outlet member 300 switch between the first position state and the second position state more accurate.

[0056] Specifically, when the air outlet member 300 is in the first position state, the air outlet member 300 can be set to move along the first direction to the second position state, and the air outlet member 300 moves along the second direction opposite to the first direction to switch the air outlet member 300 to the first position state again.

[0057] In some embodiments, reference Figure 3 As shown, the aperture of the first air hole 120 of the shell 100 and the aperture of the second air hole 310 of the gas outlet member 300 can be set to be consistent, so that the first air hole 120 on the shell 100 and the second air hole 310 on the gas outlet member 300 can be processed through one processing step, thereby improving the preparation efficiency of the battery of the present application. Specifically, the first air hole 120 on the shell 100 and the second air hole 310 on the gas outlet member 300 can both be processed by drilling. Since the aperture of the first air hole 120 is consistent with the aperture of the second air hole 310, the first air hole 120 on the shell 100 and the second air hole 310 on the gas outlet member 300 can be processed by the same drill bit.

[0058] The second position state of the air outlet member 300 may specifically include a first sub-position state and a second sub-position state. When the air outlet member 300 is in the first sub-position state, part of the second air hole 310 of the air outlet member 300 is opposite to the first air hole 120 of the housing 100, and correspondingly, another part of the second air hole 310 of the air outlet member is misaligned with the first air hole 120 of the housing 100. When the air outlet member 300 is in the second sub-position state, the second air hole 310 of the air outlet member 300 is completely opposite to the first air hole 120 of the housing 100. The air outlet member 300 switches between the first sub-position state and the second sub-position state, and the size of the part of the first air hole 120 that is opposite to the second air hole 310 can be adjusted.

[0059] Specifically, when the amount of gas generated by the electrode assembly 200 in the shell 100 is large, the gas outlet member 300 can be rotated so that the second air hole 310 of the gas outlet member 300 is completely opposite to the first air hole 120 of the shell 100, so that the gas in the shell 100 can be efficiently discharged through the first air hole 120 and the second air hole 310. When the amount of gas generated by the electrode assembly 200 in the shell 100 is small, the gas outlet member 300 can be rotated so that the second air hole 310 of the gas outlet member 300 is partially opposite to the first air hole 120 of the shell 100, so that the gas in the shell 100 can be efficiently discharged through the first air hole 120 and the second air hole 310, while the opening on the surface of the shell 100 is relatively small, which can reduce the probability of external impurities entering the cavity 110 through the first air hole 120 and the second air hole 310.

[0060] In some embodiments, reference Figures 1 to 3As shown, the number of the first air holes 120 on the housing 100 of the present application can be set to multiple, and the multiple first air holes 120 can be arranged at intervals along the rotation direction of the air outlet member 300. The number of the second air holes 310 on the air outlet member 300 can also be set to multiple, and the multiple second air holes 310 are also arranged at intervals along the rotation direction of the air outlet member 300. When the air outlet member 300 rotates relative to the housing 100, the multiple second air holes 310 on the air outlet member 300 can rotate to be opposite or offset to the multiple first air holes 120, so that the gas in the cavity 110 of the housing 100 can be discharged through the multiple first air holes 120 and the multiple second air holes 310.

[0061] Specifically, the number of the first air holes 120 and the second air holes 310 can be set to be the same, and the air outlet member 300 can be rotated so that the plurality of first air holes 120 and the plurality of second air holes 310 are opposite or offset one by one. When the gas in the cavity 110 of the housing 100 needs to be discharged to the outside of the housing 100, the air outlet member 300 can be controlled so that the plurality of first air holes 120 and the plurality of second air holes 310 are opposite to each other, so that the gas in the cavity 110 can be discharged to the outside of the housing 100 more efficiently.

[0062] In some embodiments, the plurality of first air holes 120 may be arranged along the radial direction of the air outlet member 300, and the plurality of second air holes 310 may be arranged along the radial direction of the air outlet member 300. In this way, the number of the first air holes 120 on the housing 100 may be more, and the number of the second air holes 310 on the air outlet member 300 may also be more, so that the gas in the cavity 110 of the housing 100 can be discharged to the outside of the housing 100 more efficiently.

[0063] In addition, it should be understood that when the air outlet member 300 is configured to be movable relative to the housing 100 in a straight line direction to switch between the first position state and the second position state, the plurality of first air holes 120 and the plurality of second air holes 310 can be arranged along the moving direction of the air outlet member 300. In this way, the number of the first air holes 120 and the second air holes 310 can be increased, and the plurality of first air holes 120 can be opposite or offset to the plurality of second air holes 310 in a one-to-one correspondence.

[0064] In some embodiments, reference Figures 1 to 3 As shown, a rotation groove 330 may be provided on the gas outlet member 300, and the rotation groove 330 may be provided on one side of the top of the gas outlet member 300, and the opening of the rotation groove 330 is located at the top of the gas outlet member 300. The rotation of the gas outlet member 300 may be conveniently controlled by providing the rotation groove 330. Specifically, a thread structure may be provided on the inner wall of the rotation groove 330, and the rotation of the gas outlet member 300 may be conveniently controlled by the external thread member cooperating with the thread of the rotation groove 330. In this way, the gas outlet member 300 is convenient to rotate and the structure is relatively more compact.

[0065] In addition, a protrusion structure may be provided on the inner wall of the rotating groove 330 , so that the rotation of the gas outlet member 300 can be conveniently controlled by applying a force to the protrusion structure.

[0066] In some embodiments, reference Figure 3 and Figure 3 As shown, in the present application, a buckle portion 320 may be provided on the gas outlet member 300, and a slot 160 may be provided in the housing 100, and the slot 160 cooperates with the buckle portion 320, so that the buckle portion 320 can be buckled in the slot 160. The inner wall of the slot 160 can limit the buckle portion 320 to prevent the gas outlet member 300 from falling off the housing 100 when rotating relative to the housing 100. Thus, the gas outlet member 300 can be fixed to the housing 100.

[0067] Specifically, the buckle portion 320 can be arranged at the edge of the gas outlet member 300, the clamping groove 160 can be opened on the side wall of the mounting groove 130 of the housing 100, and the clamping groove 160 is arranged along the circumference of the mounting groove 130, so that the buckle portion 320 can rotate in the clamping groove 160 along the circumference of the mounting groove 130. A sealing member 400 can also be arranged between the gas outlet member 300 and the housing 100 to prevent external impurities from entering the cavity 110 through the gap between the gas outlet member 300 and the housing 100. Specifically, the sealing member 400 can be sleeved on the gas outlet member 300, so that the sealing member 400 is located between the side wall of the gas outlet member 300 and the inner wall of the mounting groove 130 of the housing 100.

[0068] In some embodiments, reference Figure 3 As shown, the battery of the present application may also be provided with a gas permeable membrane 500, which may be provided on the gas outlet member 300 and / or the housing 100, so that in the direction from the housing 100 to the gas outlet member 300, the gas permeable membrane 500 may be located between the housing 100 and the gas outlet member 300. The gas permeable membrane 500 is a one-way membrane, which allows the gas in the cavity 110 of the housing 100 to pass through the gas permeable membrane 500 and be discharged to the outside of the housing 100, while the gas outside the housing 100 cannot pass through the gas permeable membrane 500 to enter the cavity 110 of the housing 100, thereby achieving the purpose of protecting the electrode assembly 200 in the cavity 110.

[0069] Specifically, the gas permeable membrane 500 can be fixed to the end surface of the gas outlet member 300 facing the housing 100, and the gas permeable membrane 500 covers the openings of the plurality of second air holes 310 of the gas outlet member 300. The gas permeable membrane 500 can also be fixed to the side of the housing 100 facing the gas outlet member 300, specifically located on the bottom wall of the mounting groove 130 of the housing 100, and the gas permeable membrane 500 can cover the openings of the plurality of first air holes 120 of the housing 100. The number of gas permeable membranes 500 can also be set to multiple, specifically two, and the two gas permeable membranes 500 can be respectively set to the housing 100 and the gas outlet member 300, so as to further prevent external impurities from entering the cavity 110 of the housing 100.

[0070] The gas permeable membrane 500 may be at least one of polytetrafluoroethylene membrane, polyetherimide membrane, polypropylene membrane, polydimethylsiloxane membrane and polyester membrane. That is, the gas permeable membrane 500 may be polytetrafluoroethylene membrane, polyetherimide membrane, polypropylene membrane, polydimethylsiloxane membrane or polyester membrane. The gas permeable membrane 500 may also be a membrane structure formed by mixing polytetrafluoroethylene membrane, polyetherimide membrane, polypropylene membrane, polydimethylsiloxane membrane and polyester membrane. The specific material of the gas permeable membrane 500 is not limited in this application.

[0071] Finally, it should be noted that the above implementation modes are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned implementation modes, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned implementation modes can still be modified, or some or all of the technical features therein can be replaced by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the implementation modes of the present application.

Claims

1. A battery, characterized in that: include A housing (100) having a cavity (110), wherein the housing (100) is provided with a first air hole (120) communicating with the cavity (110); An electrode assembly (200) is disposed in the cavity (110); as well as, An air outlet member (300) is provided with a second air hole (310), and the air outlet member (300) is movably disposed on the housing (100); The air outlet member (300) has a first position state and a second position state relative to the shell (100); when the air outlet member (300) is in the first position state, the first air hole (120) and the second air hole (310) are misaligned; when the air outlet member (300) is in the second position state, at least part of the first air hole (120) and the second air hole (310) are opposite to each other.

2. The battery according to claim 1, characterized in that The housing (100) is provided with a mounting groove (130), the opening of the first air hole (120) is located on the bottom wall of the mounting groove (130), and the air outlet member (300) is embedded in the mounting groove (130).

3. The battery according to claim 2, characterized in that The housing (100) comprises a bottom shell (140) and an upper cover (150); the bottom shell (140) has an opening; the upper cover (150) is arranged on the opening so that the upper cover (150) and the bottom shell (140) surround and form the receiving cavity (110); the mounting groove (130) is provided on the upper cover (150); the upper cover (150) is also provided with a liquid injection hole (170); and the liquid injection hole (170) is communicated with the receiving cavity (110).

4. The battery according to claim 3, characterized in that The air outlet member (300) is rotatably disposed in the mounting groove (130), and the air outlet member (300) is rotatable to the first position state or the second position state.

5. The battery according to claim 3, characterized in that The aperture of the first air hole (120) is consistent with the aperture of the second air hole (310), and the second position state includes a first sub-position state and a second sub-position state. When the air outlet piece (300) is in the first sub-position state, part of the first air hole (120) is opposite to the second air hole (310), and when the air outlet piece (300) is in the second sub-position state, the first air hole (120) and the second air hole (310) are completely opposite to each other.

6. The battery according to claim 5, characterized in that The number of the first air holes (120) and the number of the second air holes (310) are both multiple, and the multiple first air holes (120) and the multiple second air holes (310) are arranged at intervals along the rotation direction of the air outlet member (300), and the multiple second air holes (310) and the multiple first air holes (120) can be opposite or staggered in a one-to-one correspondence.

7. The battery according to claim 6, characterized in that The air outlet member (300) is provided with a rotation groove (330), and the groove opening of the rotation groove (330) faces away from the housing (100).

8. The battery according to claim 7, characterized in that The plurality of first air holes (120) are also distributed at intervals along the radial direction of the air outlet member (300), and / or the plurality of second air holes (310) are also distributed at intervals along the radial direction of the air outlet member (300).

9. The battery according to any one of claims 1 to 8, characterized in that: The air outlet piece (300) is provided with a buckle portion (320), the housing (100) is provided with a buckle slot (160), and the buckle portion (320) is buckled into the buckle slot (160).

10. The battery according to any one of claims 1 to 8, characterized in that: It also comprises a gas permeable membrane (500), wherein the gas permeable membrane (500) is arranged on the gas outlet member (300) and / or the housing (100), and in the direction from the housing (100) to the gas outlet member (300), the gas permeable membrane (500) is located between the first air hole (120) and the second air hole (310); The gas permeable membrane (500) is at least one of a polytetrafluoroethylene membrane, a polyetherimide membrane, a polypropylene membrane, a polydimethylsiloxane membrane and a polyester membrane.

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