Battery monomer, battery device and electric equipment

Abstract

The embodiment of the utility model discloses a battery monomer, a battery device and electric equipment, and relates to the field of batteries. The single battery comprises an end cover and an exhaust assembly, the exhaust assembly is arranged on the end cover and comprises an exhaust column and a plugging piece, the plugging piece is fixed to the side, facing the interior of the single battery, of the end cover, the exhaust column comprises an exhaust channel, one end of the exhaust channel faces the plugging piece, and the exhaust column is configured to move in the axis direction of the exhaust column; therefore, the exhaust channel and the plugging piece are attached to each other or separated from each other. According to the battery monomer, gas in the battery monomer can be exhausted in time, and the safety of the battery monomer is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of batteries, and more particularly, to a battery monomer, a battery device and an electric equipment. BACKGROUND

[0002] During use, a chemical reaction occurs inside the battery monomer, generating a large amount of gas, which causes the internal pressure of the battery monomer to rise sharply. If the pressure cannot be released in time, the battery monomer may bulge, rupture or even explode, etc. The existing structure cannot discharge the gas inside the battery monomer in time during use, increasing the possibility of damage to the battery monomer. CONTENT OF THE INVENTION

[0003] The embodiments of the present application provide a battery monomer, a battery device and an electric equipment, which can discharge the gas inside the battery monomer in time and improve the safety of the battery monomer.

[0004] In a first aspect, the present application provides a battery monomer, comprising a cover; an exhaust assembly arranged on the cover, the exhaust assembly comprising an exhaust column and a blocking piece, the blocking piece being fixed to one side of the cover facing the inside of the battery monomer, the exhaust column comprising an exhaust passage, one end of the exhaust passage being arranged towards the blocking piece, the exhaust column being configured to move along the axial direction of the exhaust column to attach or separate the exhaust passage and the blocking piece.

[0005] In the technical solution of the embodiments of the present application, the exhaust column and the blocking piece in the exhaust assembly cooperate with each other to discharge the gas generated inside the battery monomer in stages. When the internal pressure of the battery monomer rises, an external force is applied to the exhaust column to separate it from the blocking piece, open the exhaust passage, and discharge the accumulated gas inside in time, thereby relieving the pressure of the battery monomer. This timely pressure relief and exhaust mechanism can effectively reduce the possibility of fire, explosion and other safety hazards caused by excessive internal pressure of the battery monomer, improve the safety of the battery monomer under various working conditions, and enable the battery monomer to operate stably and reliably, thereby prolonging its service life.

[0006] In some embodiments of the first aspect, the exhaust column is provided with a clamping table, and the exhaust assembly further comprises a clamping ring, the clamping table and the clamping ring cooperating with each other to limit the movement of the exhaust column in the axial direction.

[0007] In the embodiments of the present application, the exhaust column is provided with a clamping table and a clamping ring which cooperate with each other to limit the movement of the exhaust column in the axial direction, thereby preventing the exhaust passage from being separated from the normal cooperation with the blocking piece due to excessive displacement of the exhaust column, effectively preventing the leakage of electrolyte and the intrusion of foreign matter, and when the exhaust column is reset, the exhaust passage and the blocking piece are resealed and attached, maintaining the normal working state of the exhaust assembly and improving the safety and reliability of the battery monomer during production and use.

[0008] In some embodiments of the first aspect, the clamping post is arranged in an arc shape along the circumference of the exhaust column, at least one side of the clamping post is provided with a first groove in the circumferential direction of the exhaust column, and two sides of the clamping post are respectively provided with a second groove and a third groove in the axial direction of the exhaust column; the inner diameter of the clamping ring is matched with the diameter of the exhaust column at the second groove and the third groove, and the inner periphery of the clamping ring is further provided with a fourth groove matched with the clamping post.

[0009] In the embodiments of the present application, the clamping post arranged in an arc shape on the exhaust column, the second groove and the third groove on both sides of the axis precisely match the inner diameter of the clamping ring, so that the clamping ring can be fixed, the first groove on the circumferential side of the clamping ring and the fourth groove of the clamping post cooperate with each other, so that the clamping ring can smoothly move between the second groove and the third groove, and the through hole of the clamping post and the clamping ring cooperate with each other, so that the clamping ring is fixed in the second groove or the third groove, thereby enhancing the connection firmness and stability, so that the exhaust column can maintain a normal working state or an exhaust state of the battery monomer, reducing the possibility of sealing failure or inability to exhaust due to movement of the exhaust column, realizing phased gas discharge and reset sealing, and improving the performance of the exhaust assembly and the safety of the battery monomer in use.

[0010] In some embodiments of the first aspect, the second groove is located on the side of the clamping post facing the plugging member, and the third groove is located on the side of the clamping post away from the plugging member; the clamping ring is located in the second groove of the exhaust column, and the clamping post of the exhaust column is clamped to the clamping ring, the exhaust column is limited to the first position, and the exhaust passage and the plugging member are attached to each other; the clamping ring is located in the third groove of the exhaust column, and the clamping post of the exhaust column is clamped to the clamping ring, the exhaust column is limited to the second position, and the exhaust passage and the plugging member are separated from each other.

[0011] In the embodiments of the present application, the second groove faces the plugging member, and the third groove is away from the plugging member. The clamping ring is clamped to the clamping post in different groove positions to limit the exhaust column. When the clamping ring is in the second groove, the exhaust column seals the exhaust passage and maintains the stability of the battery monomer inside; when the clamping ring is in the third groove, the exhaust column opens the exhaust passage and timely releases pressure, thereby improving the reliability and safety of the battery monomer exhaust assembly by controlling the exhaust, and ensuring the stable operation of the battery monomer.

[0012] In some embodiments of the first aspect, the exhaust assembly further comprises an elastic member, the elastic member is sleeved on the exhaust column, and is used for providing elastic space for the movement of the exhaust column in the axial direction.

[0013] In the embodiments of the present application, in the case that the size of the clamping ring in the axial direction is smaller than the size of the second groove and the third groove in the axial direction, the possibility of the clamping ring moving in the second groove and the third groove is reduced by the fixing effect of the elastic member, thereby improving the stability and reliability of the structure of the exhaust assembly.

[0014] In some embodiments of the first aspect, the exhaust assembly further comprises a support, the support is arranged on the end cover, and the support comprises a first through hole, and the exhaust column is arranged in the first through hole.

[0015] In the embodiments of the present application, the exhaust assembly is additionally provided with a support, a first through hole of the support is adapted to the exhaust column, the support can support the exhaust column and enable the exhaust column to move along the axial direction, the exhaust passage and the plugging member are accurately matched, reliable exhaust and sealing are achieved. The support can also enhance the overall stability of the assembly, buffer external interference, reduce the risk of displacement of components, and improve reliability and durability.

[0016] In some embodiments of the first aspect, the exhaust assembly further comprises a sealing member, the sealing member is sleeved on the exhaust column and abuts against the inner wall of the first through hole of the support.

[0017] In the embodiments of the present application, the sealing member is sleeved on the exhaust column and abuts against the inner wall of the first through hole of the support, the gap between the exhaust column and the first through hole of the support is filled, the leakage of electrolyte and the invasion of external impurities are blocked, the safety of the battery monomer is improved, the sealing member enhances the air tightness of the exhaust assembly, the internal pressure of the battery monomer is maintained stable, and the stability of the battery monomer is improved.

[0018] In some embodiments of the first aspect, the exhaust assembly further comprises an elastic member, the elastic member is sleeved on the exhaust column, and one end of the elastic member abuts against the sealing member.

[0019] In the embodiments of the present application, the elastic member is sleeved on the exhaust column, which can provide a supporting action on the movement of the exhaust column, so that the exhaust column can be fixed in the support under the action of the elastic force of the elastic member when the exhaust column is located at the first position or the second position. The continuous abutting force of the elastic member on the sealing member further enhances the sealing property between the sealing member and the exhaust column and the support, reduces the risk of electrolyte leakage, and improves the safety and reliability of the battery monomer.

[0020] In some embodiments of the first aspect, the exhaust assembly further comprises a limiting member, the limiting member is located between the elastic member and the sealing member.

[0021] In the embodiments of the present application, the limiting member is installed between the elastic member and the sealing member of the exhaust assembly, which limits the excessive compression or stretching of the elastic member when the exhaust column moves due to the change of the internal pressure of the battery monomer, and reduces the possibility of tilting of the elastic member due to uneven stress. The limiting member and the support constitute a space, and the sealing member is arranged in the space, so that the sealing member always maintains this position during the working process of the exhaust assembly, thereby maintaining good sealing effect.

[0022] In some embodiments of the first aspect, the exhaust assembly further comprises a base, the base is located on the side of the plugging member away from the exhaust column, and the base is used for fixing the plugging member.

[0023] In the embodiments of the present application, the exhaust assembly is additionally provided with a base for fixing the plugging piece, so as to provide stable support for the plugging piece, so that the plugging piece always remains in the correct position and cooperates with the exhaust column during the movement of the exhaust column. When the battery monomer needs to be exhausted, the base can stably support the plugging piece during the movement of the exhaust column, so as to ensure that the plugging piece will not displace or deform when bearing pressure, thereby maintaining the normal working state of the exhaust assembly.

[0024] In some embodiments of the first aspect, the base comprises a bottom wall, the bottom wall comprises a plurality of connecting holes, the plugging piece is partially accommodated in the plurality of connecting holes, the connecting hole comprises a first end face and a second end face, the first end face is located on the side away from the plugging piece, and the cross-sectional area of the connecting hole gradually increases along the axial direction from the first end face to the second end face.

[0025] In the embodiments of the present application, the area relationship of the cross section of the connecting hole forms a stable connecting structure, and the connecting hole assists in supporting and dispersing stress from the side, and this synergistic effect enables the connecting structure of the base to remain stable when the plugging piece is subjected to external force during the use of the exhaust assembly, thereby reducing the risk of the plugging piece being detached from the connecting hole.

[0026] In some embodiments of the first aspect, the base further comprises a side wall surrounding the plugging piece, and the side wall and the plugging piece comprise a gas passage therebetween, the side wall comprises a plurality of second through holes, and the plurality of second through holes are in communication with the exhaust passage through the gas passage in the case that the exhaust passage is separated from the plugging piece.

[0027] In the embodiments of the present application, the base comprises a side wall surrounding the plugging piece, a gas passage is constructed, and a plurality of second through holes are provided, so as to communicate the gas exhaust path when the exhaust passage is separated from the plugging piece. Not only is the exhaust efficiency improved, but also a plurality of exhaust paths are provided to quickly exhaust the gas and avoid excessive internal pressure, and the gas is uniformly exhausted from different positions to maintain the balance of the internal pressure of the battery monomer and enable the battery monomer to operate safely and stably.

[0028] In some embodiments of the first aspect, the exhaust assembly further comprises a protective piece, the protective piece is located on the side of the exhaust column away from the end cover, and the protective piece covers the exhaust passage.

[0029] In the embodiments of the present application, the protective piece covers the exhaust passage, thereby adding a dust barrier for the battery monomer, effectively blocking dust, avoiding the attachment of dust on the surface of the exhaust column, and thereby reducing the possibility of dust entering the interior of the battery monomer through the exhaust passage, so that the exhaust assembly and the battery monomer can normally operate. In addition, the protective piece can also prevent water vapor and foreign matter from entering, thereby maintaining the stability of the exhaust assembly.

[0030] In some embodiments of the first aspect, in the case that the exhaust passage and the plugging piece are attached to each other, the exhaust assembly seals the battery monomer instead of the sealing nail.

[0031] In the embodiment of the present application, the exhaust assembly replaces the sealing nail to seal the battery monomer, breaks the single sealing function limitation of the sealing nail, provides reliable sealing effect, effectively prevents electrolyte leakage and foreign matter intrusion, and has the function of exhausting according to the internal pressure of the battery monomer, thereby reducing the risk of safety hazards caused by abnormal pressure.

[0032] In a second aspect, the present application provides a battery device, comprising a plurality of battery monomers, the battery monomers comprising the battery monomer in the first aspect; a box body accommodating the plurality of battery monomers.

[0033] In a third aspect, the present application provides a power utilization device, comprising the battery device, the battery device comprising the battery device in the second aspect, and the battery device is used to provide electric energy. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 FIG. 1 is a structural schematic diagram of a battery device according to an embodiment of the present application;

[0035] Figure 2 FIG. 2 is a structural diagram of a battery monomer according to an embodiment of the present application;

[0036] Figure 3 FIG. 3 is an exploded view of the battery monomer according to the embodiment of the present application;

[0037] Figure 4 FIG. 4 is a cross-sectional view of an exhaust assembly according to an embodiment of the present application;

[0038] Figure 5 FIG. 5 is a structural diagram of an exhaust column according to an embodiment of the present application;

[0039] Figure 6 FIG. 6 is a structural diagram of a clasp according to an embodiment of the present application;

[0040] Figure 7 FIG. 7 is a partial structural diagram of the exhaust column according to the embodiment of the present application;

[0041] Figure 8 FIG. 8 is another cross-sectional view of the exhaust assembly according to the embodiment of the present application;

[0042] Figure 9 FIG. 9 is yet another cross-sectional view of the exhaust assembly according to the embodiment of the present application;

[0043] Figure 10 FIG. 10 is still another cross-sectional view of the exhaust assembly according to the embodiment of the present application;

[0044] Figure 11 FIG. 11 is another cross-sectional view of the exhaust assembly according to the embodiment of the present application;

[0045] Figure 12 FIG. 12 is an exploded view of the exhaust assembly according to the embodiment of the present application.

[0046] In the drawings, the figures are not necessarily drawn to scale.

[0047] Reference Signs:

[0048] 100 - battery device; 10 - case; 101 - first case portion; 102 - second case portion; 20 - battery cell; 21 - housing; 211 - opening; 22 - end cover; 23 - electrode terminal; 24 - pressure relief mechanism; 25 - electrode assembly; 251 - tab; 26 - exhaust assembly; 261 - exhaust column; 2610 - clamping table; 2611 - first groove; 2612 - second groove; 2613 - third groove; 2614 - exhaust passage; 2615 - cover body; 2616 - column body; 262 - blocking piece; 263 - clamping ring; 2631 - fourth groove; 264 - elastic piece; 265 - support piece; 2651 - first through hole; 266 - sealing piece; 267 - limiting piece; 268 - base; 2681 - bottom wall; 2682 - side wall; 2683 - connecting hole; 2684 - second through hole; 269 - protection piece. DETAILED DESCRIPTION

[0049] The technical solutions in the embodiments of the present application will be described below with reference to the drawings.

[0050] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly below with reference to the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, but not all of them. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0051] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the specification herein is for describing the specific embodiments only and is not intended to be limiting of the application; the use of the terms "include," "includes" and "including" in the description and the claims herein are intended to be inclusive of aspects, not exclusive. The use of terms "first", "second" and the like in the description and the claims herein is intended to indicate different objects, not to imply a specific order or a specific importance.

[0052] Reference within this application to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. As used in this application, the term "or" is intended to mean an inclusive "or" rather than an exclusive "or". That is, unless specified otherwise, or clear from context, "X employs A or B" means that X employs A or B or both. The term "a" or "an" is defined as one or more unless explicitly indicated to the contrary or otherwise evident from the context. The term "plurality" is defined as two or more unless explicitly indicated to the contrary or otherwise evident from the context.

[0053] In the description of the application, it is necessary to explain that, unless otherwise specified and limited, the terms "mounting", "connecting", "connecting", "attaching" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0054] In this application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three kinds of relationships, for example, A and / or B can represent the existence of A alone, the existence of A and B together, and the existence of B alone. In addition, the character " / " in this application generally represents that the front and rear associated objects have an "or" relationship.

[0055] In the embodiments of the application, the same reference signs represent the same parts, and for the sake of brevity, the detailed description of the same parts is omitted in different embodiments. It should be understood that the thickness, length and width of various components in the embodiments of the application shown in the drawings, as well as the overall thickness, length and width of the integrated device, are only exemplary and should not constitute any limitation on the application.

[0056] "Multiple" appearing in this application means more than two (including two), and similarly, "multiple groups" means more than two groups (including two groups), and "multiple pieces" means more than two pieces (including two pieces).

[0057] If not specifically stated, all embodiments and optional embodiments of the application can be combined with each other to form new technical solutions.

[0058] If not specifically stated, all technical features and optional technical features of the application can be combined with each other to form new technical solutions.

[0059] In the embodiments of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be activated by charging after discharging to continue to use.

[0060] The battery cell can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, or the like, and the embodiments of the present application are not limited thereto.

[0061] The battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator disposed between the negative electrode and the positive electrode. During charging and discharging of the battery cell, active ions (e.g., lithium ions) are intercalated and deintercalated between the positive electrode and the negative electrode. The separator disposed between the positive electrode and the negative electrode can reduce the occurrence of short circuiting between the positive electrode and the negative electrode, while allowing the active ions to pass through.

[0062] In some embodiments, the positive electrode can be a positive electrode sheet, which can include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0063] As an example, the positive electrode current collector has two surfaces opposite in the thickness direction thereof, and the positive electrode active material is disposed on either one or both of the two opposite surfaces of the positive electrode current collector.

[0064] As an example, the positive electrode active material can include at least one of lithium-containing phosphates, lithium transition metal oxides, and modified compounds thereof. However, the present application is not limited to these materials, and other conventional materials that can be used as positive electrode active materials can also be used. These positive electrode active materials can be used alone or in combination with two or more.

[0065] In some embodiments, the positive electrode can be a foam metal. The foam metal can be a foam nickel, a foam copper, a foam aluminum, a foam alloy, or a foam carbon, etc. When the foam metal is used as the positive electrode, the foam metal surface can not be provided with the positive electrode active material, or can be provided with the positive electrode active material. As an example, the positive electrode active material is filled or / and deposited in the foam metal.

[0066] In some embodiments, the negative electrode can be a negative electrode sheet, which can include a negative electrode current collector.

[0067] As an example, the negative electrode current collector can be a metal foil, a conductive polymer material, a carbon material, or a composite current collector. For example, as a metal foil, a pure metal, an alloy, a surface-treated metal, including but not limited to stainless steel, copper, aluminum, nickel, nickel, titanium, or silver, etc. can be used. The composite current collector can include a polymer material base layer and a metal layer. The composite current collector can be formed by forming a metal material (copper, copper alloy, nickel, nickel alloy, titanium, titanium alloy, silver, and silver alloy, etc.) on a polymer material base material (such as a base material of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0068] As an example, the negative electrode sheet can include a negative electrode current collector and a negative electrode active material disposed on at least one surface of the negative electrode current collector.

[0069] As an example, the negative electrode current collector has two surfaces opposite in the thickness direction thereof, and the negative electrode active material is disposed on either one or both of the two opposite surfaces of the negative electrode current collector.

[0070] As an example, the negative electrode active material can be a negative electrode active material for a battery cell known in the art.

[0071] In some embodiments, the negative electrode can employ a foamed metal. The foamed metal can be foamed nickel, foamed copper, foamed aluminum, foamed alloy, or foamed carbon, etc. When the foamed metal is used as the negative electrode sheet, the surface of the foamed metal can not be provided with the negative electrode active material, or can be provided with the negative electrode active material.

[0072] As an example, the negative electrode active material can be filled or / and deposited in the negative electrode current collector.

[0073] In some embodiments, the material of the positive electrode current collector can be aluminum, and the material of the negative electrode current collector can be copper.

[0074] In some embodiments, the electrode assembly further includes a separator disposed between the positive electrode and the negative electrode.

[0075] In some embodiments, the separator is a separator film. The type of the separator film is not particularly limited in the present application, and any known porous structure separator film having good chemical stability and mechanical stability can be used.

[0076] In some embodiments, the battery cell further includes an electrolyte, which functions to conduct ions between the positive electrode and the negative electrode. The type of the electrolyte is not particularly limited in the present application, and can be selected as needed. The electrolyte can be in a liquid state, a gel state, or a solid state.

[0077] The electrode assembly can be in a roll structure, a stack structure, or a hybrid structure of roll and stack.

[0078] In some embodiments, the electrode assembly is in a roll structure. The positive electrode sheet and the negative electrode sheet are rolled into the roll structure.

[0079] In some embodiments, the electrode assembly is in a stack structure.

[0080] As an example, a plurality of positive electrode sheets and a plurality of negative electrode sheets can be provided, and the plurality of positive electrode sheets and the plurality of negative electrode sheets can be alternately stacked.

[0081] As an example, a plurality of positive electrode sheets can be provided, and the negative electrode sheet can be folded to form a plurality of folded segments stacked, and one positive electrode sheet can be clamped between adjacent folded segments.

[0082] As an example, the positive electrode sheet and the negative electrode sheet are each folded to form a plurality of folded segments stacked one on another.

[0083] As an example, a plurality of separators can be provided, each provided between any adjacent positive electrode sheet or negative electrode sheet.

[0084] As an example, the separators can be provided continuously, each provided between any adjacent positive electrode sheet or negative electrode sheet by folding or winding.

[0085] In some embodiments, the electrode assembly can have a shape of a cylinder, a flat, a polygonal prism, or the like.

[0086] In some embodiments, the electrode assembly can be provided with tabs, which can lead current out of the electrode assembly. The tabs can include positive tabs and negative tabs.

[0087] In some embodiments, the battery cell can include a housing. The housing can be a steel housing, an aluminum housing, a plastic housing (e.g., polypropylene), a composite metal housing (e.g., a copper-aluminum composite housing), or an aluminum-plastic film, or the like. In some embodiments, the housing can be a sealed structure or a non-sealed structure. As an example, when the housing is a non-sealed structure, the housing serves to protect the electrode assembly, and a sealing bag can be further included between the housing and the electrode assembly, the sealing bag being configured to encapsulate the electrode assembly and the electrolyte. Specifically, the sealing bag can be a bag-shaped insulating member or an aluminum-plastic film. When the housing is a sealed structure, the housing is configured to encapsulate the electrode assembly and the electrolyte.

[0088] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell having another shape. The prismatic battery cell can include a square battery cell, a blade battery cell, a polygonal prism battery cell (e.g., a hexagonal prism battery cell), or the like.

[0089] In some embodiments, the housing can include a cap and a housing body, the housing body being provided with an opening, and the cap being provided to cover the opening. The housing body can be provided with one or more openings. The cap can also be provided with one or more openings.

[0090] In some embodiments, the housing can be provided with at least one electrode terminal, the electrode terminal being electrically connected to the tab. The electrode terminal can be directly connected to the tab or indirectly connected to the tab via a current collector. The electrode terminal can be provided on the cap or on the housing body.

[0091] In some embodiments, the housing can be provided with a pressure relief mechanism. The pressure relief mechanism can be configured to discharge internal gas of the battery cell.

[0092] As an example, the internal pressure or temperature of the battery cell reaches a predetermined threshold value to actuate to release the internal pressure or temperature. When the internal pressure or temperature of the battery cell reaches the predetermined threshold value, the pressure relief mechanism performs an action or a weak structure provided in the pressure relief mechanism is broken, thereby forming an opening or passage for the internal pressure or temperature to be released. The threshold value is designed differently according to design requirements. The threshold value can depend on the material of one or more of the positive plate, the negative plate, the electrolyte, and the separator in the battery cell.

[0093] As an example, the pressure relief mechanism can be integrally formed with the housing.

[0094] As an example, the pressure relief mechanism can also be provided separately from the housing and connected.

[0095] As referred to in this application, "actuation" means that the pressure relief mechanism performs an action or is activated to a certain state, so that the internal pressure and temperature of the battery cell can be released. The action performed by the pressure relief mechanism can include but is not limited to: moving of a component in the pressure relief mechanism to vent, breaking, shattering, tearing or opening of at least a portion of the pressure relief mechanism, etc. When the pressure relief mechanism is actuated, the high-temperature and high-pressure substances inside the battery cell will be discharged as exhaust from the actuated part. In this way, the battery cell can be released and cooled under controllable pressure or temperature, thereby reducing the possibility of a more serious accident.

[0096] In some embodiments, when the housing is a non-sealed structure, the pressure relief mechanism can be provided as a through hole for discharging the gas inside the battery cell.

[0097] As referred to in this application, the exhaust from the battery cell includes but is not limited to: electrolyte, dissolved or split positive and negative plates, fragments of separators, high-temperature and high-pressure gases generated by reactions, flames, etc.

[0098] As referred to in the embodiments of this application, the battery apparatus can include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly can include a plurality of battery cells connected in series, in parallel, or in a mixed connection through busbar components.

[0099] In some embodiments, the battery cell assembly is generally formed by arranging a plurality of battery cells.

[0100] As an example, the battery cell assembly can be a battery module formed by arranging and fixing a plurality of battery cells into an independent module. As an example, the battery module can be formed by bundling a plurality of battery cells with a cable tie.

[0101] In some embodiments, the battery device can be a battery pack, which includes a case and one or more battery cell assemblies housed in the case.

[0102] As an example, the battery cell assembly can be a battery module, which can be housed in the case by fixing the battery module in the case.

[0103] As an example, the battery cell assembly can also be housed in the case by fixing a plurality of battery cells directly in the case.

[0104] As an example, the case can include a first case part and a second case part. The first case part and the second case part are fastened so that an enclosed space is formed inside the case to accommodate the battery cell assembly. Here, enclosed means covered or closed, which can be sealed or unsealed. The first case part can be a top cover or a bottom plate.

[0105] As an example, the case can include a top cover, a frame and a bottom plate. The top cover and the bottom plate are respectively connected with the frame so that an enclosed space is formed inside the case to accommodate the battery cell assembly.

[0106] In some embodiments, the case can be part of the chassis structure of a vehicle. For example, part of the case can be at least part of the floor of the vehicle, or part of the case can be at least part of the cross beam and the longitudinal beam of the vehicle.

[0107] During use, a chemical reaction occurs inside the battery cell, generating a large amount of gas and causing the internal pressure of the battery to rise sharply. If these pressures cannot be released in time and effectively, the battery cell may suffer from bulging, rupture, explosion and other safety accidents. The existing structure cannot timely discharge the gas inside the battery cell during use, increasing the possibility of damage to the battery cell.

[0108] Based on the above considerations, the embodiments of the present application provide a battery cell capable of timely discharging the gas inside the battery cell and improving the safety of the battery cell. The battery cell provided by the embodiments of the present application includes an end cover and an exhaust assembly, the exhaust assembly is arranged on the end cover, the exhaust assembly includes an exhaust column and a blocking piece, the blocking piece is fixed to one side of the end cover facing the inside of the battery cell, the exhaust column includes an exhaust passage, one end of the exhaust passage is arranged towards the blocking piece, and the exhaust column is configured to move along the axis direction of the exhaust column to make the exhaust passage and the blocking piece attached to each other or separated from each other.

[0109] In the exhaust assembly, the exhaust column and the blocking piece are matched with each other, and can stage the exhaust operation of the gas generated in the battery monomer. When the internal pressure of the battery monomer rises, the external force is applied to the exhaust column to separate the exhaust column from the blocking piece, open the exhaust passage, and timely exhaust the accumulated gas in the internal, thereby performing pressure relief and exhaust on the battery monomer. This timely pressure relief and exhaust mechanism can effectively reduce the possibility of fire, explosion and other safety hazards caused by the excessive internal pressure of the battery monomer, improve the use safety of the battery monomer under various working conditions, enable the battery monomer to stably and reliably operate, and prolong the service life of the battery monomer.

[0110] Figure 1 The structure diagram of the battery device of the embodiment of the present application is shown in FIG. 1. As shown in FIG. 1, the battery device 100 of the embodiment of the present application can include a plurality of battery monomers 20 to meet different power requirements. It should be understood that, as shown in FIG. 2, the battery device 100 of the embodiment of the present application can also include a box body 10. Figure 1 Figure 1

[0111] The box body 10 can include two parts, which are referred to as a first box body part 101 and a second box body part 102 herein, and the first box body part 101 and the second box body part 102 are buckled together. The shapes of the first box body part 101 and the second box body part 102 can be determined according to the shapes of the components accommodated therein, for example, can be determined according to the shape of the combination of the plurality of battery monomers 20 accommodated therein, and at least one of the first box body part 101 and the second box body part 102 has an opening. For example, the first box body part 101 and the second box body part 102 can each be a hollow cuboid and each have an opening face, the opening of the first box body part 101 and the opening of the second box body part 102 are oppositely arranged, and the first box body part 101 and the second box body part 102 are buckled together to form a box body 10 having a closed cavity, which can be used to accommodate the plurality of battery monomers 20. The plurality of battery monomers 20 are placed in the box body 10 formed by buckling the first box body part 101 and the second box body part 102 after being combined in parallel or in series or in a hybrid combination.

[0112] For another example, only one of the first box body part 101 and the second box body part 102 can be a hollow cuboid having an opening, and the other can be a plate to cover the opening. Taking the second box body part 102 as a hollow cuboid having an opening and the first box body part 101 as a plate as an example, the first box body part 101 covers the opening of the second box body part 102 to form a box body 10 having a closed cavity, which can be used to accommodate the plurality of battery monomers 20.

[0113] Figure 2 The structure diagram of the battery monomer of the embodiment of the present application is shown in FIG. 3, Figure 3 The exploded view of the battery monomer of the embodiment of the present application is shown in FIG. 4, Figure 4 ​​This is a cross-sectional view of the exhaust assembly according to an embodiment of this application. Figures 2 to 4 As shown, the battery cell 20 of this embodiment includes an end cap 22 and an exhaust assembly 26. The exhaust assembly 26 is disposed on the end cap 22 and includes an exhaust column 261 and a sealing member 262. The sealing member 262 is fixed to the side of the end cap 22 facing the inside of the battery cell 20. The exhaust column 261 includes an exhaust channel 2614. One end of the exhaust channel 2614 is disposed facing the sealing member 262. The exhaust column 261 is configured to move along the axial direction of the exhaust column 261 so that the exhaust channel 2614 and the sealing member 262 are attached to or separated from each other.

[0114] On the battery cell 20 production line, after assembly, the battery cells 20 enter the quality inspection area. Operators manually push the exhaust column 261 along its axis by holding a specific part of the exhaust column 261, following a prescribed procedure and pressure. At this time, the exhaust channel 2614 separates from the sealing component 262, simulating the exhaust process of gas generated by the battery cell 20 during actual use. Inspectors can make a preliminary judgment on the internal condition of the battery cell 20 by observing the exhaust velocity, flow rate, and the appearance and odor of the exhaust gas. This manual exhaust inspection method allows for the timely detection of quality problems in the battery cells 20, screening out substandard products and preventing them from entering subsequent packaging and sales stages, thereby improving the overall quality and safety of the battery product.

[0115] During the daily operation of the production line, the collection and analysis of data from manual exhaust gas detection can be used to optimize the production process of battery cells 20. For example, if a large number of battery cells 20 are found to have abnormal exhaust gas during the inspection process, the manufacturer can investigate and analyze various aspects such as the selection of raw materials, electrode manufacturing process, electrolyte formulation, and assembly process of the battery cells 20. By continuously adjusting and optimizing the production process based on the data feedback from manual exhaust gas detection, the performance consistency and stability of battery cells 20 can be improved, production costs can be reduced, production efficiency can be increased, and the produced battery products can better meet market demands.

[0116] The battery cell 20 in this embodiment may further include a housing 21 and an electrode assembly 25. The housing 21 is a hollow structure with an opening 211, and the electrode assembly 25 is housed within the housing 21. The shape of the housing 21 may be determined according to the specific shape of the electrode assembly 25. For example, if the electrode assembly 25 is a cuboid structure, the housing 21 may also be a cuboid structure. Figure 3 and Figure 4 An exemplary case is shown where the housing 21 and electrode assembly 25 are square.

[0117] The material of the shell 21 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, etc., and the embodiments of the present application do not limit this.

[0118] The end cover 22 is used to cover the opening 211 to form a sealed mounting space for accommodating the electrode assembly 25. The mounting space is also used to accommodate an electrolyte, such as an electrolyte solution. The electrode terminal 23 is mounted on the end cover 22 and is used to connect with the electrode assembly 25, i.e., the electrode terminal 23 is connected with the tab 251 of the electrode assembly 25.

[0119] The pressure relief mechanism 24 can also be mounted on the end cover 22. When the internal pressure of the battery monomer 20 abnormally rises, the pressure relief mechanism 24 can be started in time to release the excessive internal pressure of the battery monomer 20, thereby reducing the possibility of explosion and other dangerous situations of the battery monomer 20.

[0120] In the embodiments of the present application, the exhaust column 261 is mounted on the end cover 22, i.e., one end of the exhaust column 261 is located outside the battery monomer 20 and the other end is located inside the battery monomer 20. Specifically, the exhaust column 261 can include a cover body 2615 and a column body 2616, the cover body 2615 is connected with the column body 2616, the cover body 2615 is located outside the end cover 22, and the column body 2616 penetrates the end cover 22 into the inside of the battery monomer 20.

[0121] The exhaust column 261 includes an exhaust passage 2614, and the exhaust passage 2614 penetrates the exhaust column 261, i.e., the gas inside the battery monomer 20 can be discharged to the outside of the battery monomer 20 through the exhaust passage 2614.

[0122] In the embodiments of the present application, the plugging piece 262 is fixed to the side of the end cover 22 facing the inside of the battery monomer 20, i.e., the plugging piece 262 is located inside the battery monomer 20 and is fixed to the end cover 22.

[0123] In some embodiments, one end of the exhaust passage 2614 is correspondingly arranged with the plugging piece 262, i.e., the end of the column body 2616 of the exhaust column 261 not connected with the cover body 2615 is correspondingly arranged with the plugging piece 262, specifically, the orthographic projection of the exhaust passage 2614 towards the plugging piece 262 falls on the plugging piece 262, i.e., the plugging piece 262 can completely cover one end of the exhaust passage 2614 towards the inside of the battery monomer 20.

[0124] The exhaust passage 2614 and the blocking member 262 can achieve sealing when attached to each other. The blocking member 262 can be a structure with elasticity. When the exhaust passage 2614 and the blocking member 262 are attached to each other, the blocking member 262 is pressed by the exhaust column 261 port, and deforms elastically under the action of the force. Since the blocking member 262 itself has elasticity, its deformation process has a certain self-adaptive ability, and can tightly fit the port of the exhaust passage 2614, thereby achieving interference fit between the two.

[0125] In some embodiments, the sealing can be achieved by designing the shape of the port of the exhaust passage 2614 and the sealing surface of the blocking member 262, for example, using a tapered fit, so that the blocking member 262 can partially enter the exhaust passage 2614, improving the sealing performance.

[0126] In some embodiments, the exhaust column 261 can move along its own axis direction. This movement enables the exhaust passage 2614 and the blocking member 262 to switch between different working states, that is, to block the exhaust passage 2614 under normal circumstances, to prevent the electrolyte inside the battery monomer 20 from leaking and foreign matter from entering the inside of the battery monomer 20, and to separate from the exhaust column 261 when exhaust is needed, to achieve the exhaust function.

[0127] Specifically, in the normal working state of the battery monomer 20, the exhaust column 261 is in the first position, so that the exhaust passage 2614 and the blocking member 262 are attached. At this time, the blocking member 262 blocks the exhaust passage 2614, preventing the inside of the battery monomer 20 from communicating with the outside, so that the inside of the battery monomer 20 is in a sealed state.

[0128] When the battery monomer 20 runs for a period of time, gas is generated inside the battery monomer 20 due to chemical reactions and other reasons, resulting in internal pressure, and exhaust is needed. At this time, an external force needs to be applied to the exhaust column 261, so that the exhaust column 261 moves along its axis direction, and the exhaust passage 2614 and the blocking member 262 are separated from each other. The exhaust passage 2614 is opened, and the gas inside the battery monomer 20 can be discharged to the outside through the exhaust passage 2614, thereby reducing the pressure inside the battery monomer 20 and avoiding damage to the battery monomer 20 due to excessive pressure.

[0129] For example, the blocking member 262 can include a through hole. When exhaust is needed, the gas can enter the exhaust passage 2614 from the through hole.

[0130] When the internal pressure of the battery monomer 20 decreases to a certain extent, the exhaust column 261 moves along the axis direction under the action of the force, re-attaches to the blocking member 262, closes the exhaust passage 2614, and restores the sealing state of the battery monomer 20.

[0131] In the exhaust assembly 26, the exhaust column 261 cooperates with the blocking piece 262 to stage the exhaust operation of the gas generated inside the battery monomer 20. When the internal pressure of the battery monomer 20 rises, an external force is applied to the exhaust column 261 to separate it from the blocking piece 262, open the exhaust passage 2614, and timely exhaust the internal accumulated gas, thereby relieving the pressure of the battery monomer 20. This timely pressure relief mechanism can effectively reduce the possibility of fire, explosion and other safety hazards caused by excessive internal pressure of the battery monomer 20, improve the use safety of the battery monomer 20 under various working conditions, and enable the battery monomer 20 to operate stably and reliably, prolonging its service life.

[0132] Figure 5 FIG. 4 is a structural diagram of an exhaust column according to an embodiment of the present application, Figure 6 FIG. 5 is a structural diagram of a snap ring according to an embodiment of the present application. As shown in Figure 5 and Figure 6 The exhaust column 261 is provided with a clamping table 2610, and the exhaust assembly 26 further includes a snap ring 263. The clamping table 2610 cooperates with the snap ring 263 to limit the movement of the exhaust column 261 in the axial direction.

[0133] In the present application, the exhaust column 261 is provided with a clamping table 2610, which can be located at one end of the exhaust column 261 corresponding to the blocking piece 262, i.e. the clamping table 2610 is located at the end of the column body 2616 of the exhaust column 261 which is not connected to the cover body 2615.

[0134] In some embodiments, the exhaust assembly 26 further includes a snap ring 263. The snap ring 263 has a ring structure, and its inner diameter is matched with the outer diameter of the clamping table 2610 of the exhaust column 261, so that it can be tightly fitted on the exhaust column 261. The outer diameter of the snap ring 263 is larger than the inner diameter of the mounting hole of the end cover 22, so that the snap ring 263 cannot pass through the mounting hole of the end cover 22 to enter the inside of the battery monomer 20.

[0135] The snap ring 263 is usually made of a metal material or a high-strength engineering plastic with certain strength and toughness, so that it will not deform or be damaged due to stress during long-term use, thereby ensuring the stability and reliability of its limiting function on the exhaust column 261.

[0136] Exemplarily, the clamping table 2610 can be a protruding structure, and the movement of the exhaust column 261 can be limited by the snap ring 263.

[0137] During the assembly of the exhaust assembly 26, the snap ring 263 is first sleeved on the exhaust column 261, so that the snap ring 263 is located on one side of the clamping table 2610 close to the outer side of the end cover 22. Then the exhaust column 261 provided with the snap ring 263 is installed through the installation hole of the end cover 22, at this time the clamping table 2610 and the snap ring 263 are located on the side of the end cover 22 facing the inside of the battery monomer 20. When the exhaust column 261 moves in the axial direction under the action of an external force, the clamping table 2610 moves together with the exhaust column 261. When the clamping table 2610 moves to contact the snap ring 263, the snap ring 263 will block the clamping table 2610, thereby limiting the exhaust column 261 from continuing to move in this direction.

[0138] In the embodiment of the present application, the exhaust column 261 is provided with the clamping table 2610 and the snap ring 263 which cooperate with each other to limit the movement of the exhaust column 261 in the axial direction, avoid excessive displacement of the exhaust column 261 from causing the exhaust passage 2614 and the plugging piece 262 to disengage from normal cooperation, effectively prevent electrolyte leakage and foreign matter intrusion, and when the exhaust column 261 is reset, the exhaust passage 2614 and the plugging piece 262 re-achieve a sealed attached state, maintain the normal working state of the exhaust assembly 26, and improve the safety and reliability of the battery monomer 20 during production and use.

[0139] Figure 7 Figure 3 is a partial structure diagram of the exhaust column of the present application. Referring to Figure 6 As shown in Figure 7 , the clamping table 2610 is arranged in an arc shape along the circumference of the exhaust column 261. At least one side of the clamping table 2610 is provided with a first groove 2611 in the circumferential direction of the exhaust column 261. Both sides of the clamping table 2610 are respectively provided with a second groove 2612 and a third groove 2613 in the axial direction of the exhaust column 261. The inner diameter of the snap ring 263 is matched with the diameter of the exhaust column 261 at the second groove 2612 and the third groove 2613, and the inner circumference of the snap ring 263 is further provided with a fourth groove 2631 matched with the clamping table 2610.

[0140] It should be understood that Figure 7 For Figure 5 Figure 4 is a partial structure diagram of one end of the middle column body 2616.

[0141] At least one side of the clamping table 2610 is provided with a first groove 2611 in the circumferential direction of the exhaust column 261. For example, the clamping table 2610 can include one first groove 2611. For another example, the clamping table 2610 can also include two first grooves 2611, at this time the clamping table 2610 is divided into two parts, and the two parts can be symmetrically distributed along the axis of the exhaust column 261.

[0142] In the embodiments of the present application, the diameter of the exhaust column 261 at the second groove 2612 and the third groove 2613 is matched with the inner diameter of the snap ring 263. Specifically, the inner diameter of the snap ring 263 can be slightly larger than the diameter of the exhaust column 261 at the second groove 2612 and the third groove 2613, so that the snap ring 263 can move between the second groove 2612 and the third groove 2613.

[0143] It should be understood that the snap ring 263 can be fixed on the sealing member 266, and by moving the exhaust column 261, the snap ring 263 is located at the second groove 2612 or the third groove 2613. For the convenience of description, the movement of the snap ring 263 between the second groove 2612 and the third groove 2613 is described herein.

[0144] In some embodiments, for the convenience of processing, the size of the second groove 2612 and the third groove 2613 along the axial direction can be the same.

[0145] In some embodiments, in order to enable the snap ring 263 to be matched with the second groove 2612 and the third groove 2613, the size of the snap ring 263 along the axial direction should be less than or equal to the size of the second groove 2612 and the third groove 2613 along the axial direction.

[0146] The inner diameter of the snap ring 263 should also be less than the diameter of the exhaust column 261 at the card table 2610, so that when the snap ring 263 moves to the second groove 2612 and the third groove 2613, the card table 2610 can limit the movement of the snap ring 263, i.e., limit the movement of the snap ring 263.

[0147] The inner periphery of the snap ring 263 is further provided with a fourth groove 2631 matched with the card table 2610. The shape and size of the fourth groove 2631 are matched with the card table 2610, and when the snap ring 263 moves between the second groove 2612 and the third groove 2613, the card table 2610 can pass through the fourth groove 2631, and the exhaust column 261 at the first groove 2611 can pass through the through hole of the snap ring 263.

[0148] In the embodiments of the present application, the arc-shaped clamping table 2610 on the exhaust column 261, the second groove 2612 and the third groove 2613 on both sides of the axis are precisely matched with the inner diameter of the clamping ring 263, so that the clamping ring 263 can be fixed. The first groove 2611 on the circumferential side of the clamping ring 263 and the fourth groove 2631 of the clamping table 2610 cooperate with each other, so that the clamping ring 263 can be smoothly moved between the second groove 2612 and the third groove 2613. The through hole of the clamping table 2610 and the clamping ring 263 cooperate with each other, so that the clamping ring 263 is fixed in the second groove 2612 or the third groove 2613, thereby enhancing the connection firmness and stability, so that the exhaust column 261 can maintain a normal working state or an exhaust state of the battery monomer 20, thereby reducing the possibility of sealing failure or inability to exhaust due to the movement of the exhaust column 261, achieving phased gas discharge and reset sealing, and improving the performance of the exhaust assembly 26 and the use safety of the battery monomer 20.

[0149] In the embodiments of the present application, the second groove 2612 is located on one side of the clamping table 2610 facing the plugging member 262, and the third groove 2613 is located on the other side of the clamping table 2610 away from the plugging member 262. The clamping ring 263 is located in the second groove 2612 of the exhaust column 261, and the clamping table 2610 of the exhaust column 261 is clamped to the clamping ring 263, so that the exhaust column 261 is limited to the first position, and the exhaust passage 2614 and the plugging member 262 are attached to each other. The clamping ring 263 is located in the third groove 2613 of the exhaust column 261, and the clamping table 2610 of the exhaust column 261 is clamped to the clamping ring 263, so that the exhaust column 261 is limited to the second position, and the exhaust passage 2614 and the plugging member 262 are separated from each other.

[0150] The second groove 2612 is located on one side of the clamping table 2610 facing the plugging member 262, and the third groove 2613 is located on the other side of the clamping table 2610 away from the plugging member 262, i.e. along the axis direction of the exhaust column 261, from the cover body 2615 to the column body 2616, in order, the second groove 2612, the clamping table 2610 and the third groove 2613.

[0151] In some embodiments, when the clamping ring 263 is located in the second groove 2612, the plugging member 262 and the exhaust passage 2614 are attached to each other, and the exhaust assembly 26 is in a sealed state. When the clamping ring 263 is located in the third groove 2613, the plugging member 262 and the exhaust passage 2614 are separated from each other, and the gas inside the battery monomer 20 is discharged through the exhaust passage 2614.

[0152] When the battery cell 20 is in normal operation, i.e., no gas needs to be discharged from the battery cell 20, the snap ring 263 is located in the second groove 2612, the clamping post 2610 is clamped with the through hole of the snap ring 263, i.e., away from the fourth groove 2631 of the snap ring 263. When a large amount of gas needs to be discharged from the battery cell 20, the cover 2615 of the exhaust column 261 is rotated, the cover 2615 drives the column 2616 to rotate, the clamping post 2610 coincides with the fourth groove 2631, the first groove 2611 coincides with the through hole of the clamping post 2610, so that the exhaust column 261 can move along the axis direction, the exhaust column 261 is moved upward, so that the snap ring 263 is located in the third groove 2613, the exhaust column 261 is rotated, so that the clamping post 2610 is clamped with the through hole of the snap ring 263, i.e., the clamping post 2610 is moved from the fourth groove 2631 of the snap ring 263 to the through hole of the snap ring 263, to complete the clamping of the clamping post 2610 and the exhaust column 261.

[0153] After the clamping post 2610 is clamped with the exhaust column 261, the blocking piece 262 is separated from the exhaust column 261, at this time, the gas in the battery cell 20 enters the exhaust passage 2614 through the space between the blocking piece 262 and the exhaust column 261, and then is discharged out of the battery cell 20 through the exhaust passage 2614.

[0154] In the embodiment of the present application, the second groove 2612 is away from the blocking piece 262, the third groove 2613 is away from the blocking piece 262, the snap ring 263 is clamped with the clamping post 2610 at different groove positions, and the exhaust column 261 is limited. When the snap ring 263 is in the second groove 2612, the exhaust column 261 seals the exhaust passage 2614, and the stability of the battery cell 20 is maintained; when the snap ring 263 is in the third groove 2613, the exhaust column 261 opens the exhaust passage 2614, and timely pressure relief is achieved. By controlling the exhaust, the reliability and safety of the exhaust assembly 26 of the battery cell 20 are improved, and the stable operation of the battery cell 20 is ensured.

[0155] Figure 8 Another sectional view of the exhaust assembly of the embodiment of the present application is shown in FIG. 6. As shown in FIG. 6, the exhaust assembly 26 further includes an elastic piece 264, which is sleeved on the exhaust column 261, and is used to provide an elastic space for the movement of the exhaust column 261 in the axis direction. Figure 8

[0156] In the exhaust assembly 26, the elastic piece 264 is sleeved on the exhaust column 261, and provides a movement space for the movement of the exhaust column 261 in the axis direction within the elastic limit of the elastic piece 264.

[0157] In the embodiment of the present application, when the exhaust column 261 is in the first position or the second position, the elastic piece 264 is in a compressed state.

[0158] ​When the internal pressure of the battery cell 20 changes, the exhaust column 261 is used to exhaust, and the exhaust column 261 moves upward, and the elastic member 264 is stretched. In the pressure drop stage, the exhaust column 261 moves downward, and the elastic member 264 is compressed, so that the clamping table 2610 is fixed by the clamping ring 263, and the elastic member 264 is in a fixed state in the axial direction.

[0159] In the case where the size of the clamping ring 263 in the axial direction is smaller than the size of the second groove 2612 and the third groove 2613 in the axial direction, the clamping ring 263 can move in the axial direction in the second groove 2612 and the third groove 2613, and the elastic member 264 uses the elastic force to fix the clamping ring 263 in the second groove 2612 or the third groove 2613, reducing the possibility of movement.

[0160] Specifically, when the internal pressure of the battery cell 20 is in a normal state, the exhaust column 261 does not need to move to open the exhaust passage 2614, and the elastic force of the elastic member 264 pushes the clamping ring 263 to tightly fit the bottom of the second groove 2612, so that the clamping ring 263 will not move randomly in the second groove 2612 due to external factors such as vibration, jolt, etc., and the exhaust column 261 is maintained in the first position, so that the exhaust passage 2614 and the plugging member 262 remain in a sealed state of mutual attachment, preventing internal gas leakage of the battery cell 20. When the internal pressure of the battery cell 20 increases and needs to be exhausted, the clamping ring 263 moves from the second groove 2612 to the third groove 2613, and the elastic force of the elastic member 264 still acts on the clamping ring 263 during the compression process, so that the clamping ring 263 remains relatively stable during the movement process, and then the elastic force of the elastic member 264 fixes the clamping ring 263 at the bottom of the third groove 2613 after reaching the third groove 2613. The exhaust column 261 is limited in the second position, so that the exhaust passage 2614 and the plugging member 262 are separated from each other to achieve exhaust. Through the fixing effect of the elastic member 264, the possibility of movement of the clamping ring 263 in the second groove 2612 and the third groove 2613 is reduced, and the stability and reliability of the structure of the exhaust assembly 26 are improved.

[0161] Referring to Figure 8 In the embodiments of the present application, the exhaust assembly 26 further comprises a support member 265, and the support member 265 is arranged on the end cover 22. The support member 265 comprises a first through hole 2651, and the exhaust column 261 is arranged in the first through hole 2651.

[0162] In some embodiments, the support member 265 is arranged on the end cover 22. Specifically, the end cover 22 can comprise a mounting hole, and the support member 265 can be fixed to the end cover 22 through the mounting hole, i.e., the support member 265 is located in the mounting hole.

[0163] The support 265 includes a first through hole 2651, and the column body 2616 of the exhaust column 261 penetrates the first through hole 2651 to enter the inside of the battery monomer 20.

[0164] The support 265 and the end cover 22 can be fixed by welding, gluing or mechanical connection. The position of the support 265 on the end cover 22 can be planned according to the needs of the battery monomer 20, which is not limited in the application.

[0165] In some embodiments, the exhaust column 261 is arranged in the first through hole 2651 of the support 265, and the support 265 can support the exhaust column 261. During the use of the battery monomer 20, when the battery monomer 20 needs to be exhausted, the exhaust column 261 needs to be moved. The support 265 can limit the displacement of the exhaust column 261 in the non-axis direction through the cooperation of the first through hole 2651 and the exhaust column 261, so that the exhaust column 261 can move along the axis direction to realize the exhaust and sealing functions.

[0166] In the embodiments of the application, the arrangement of the support 265 enhances the overall stability of the exhaust assembly 26. Since the support 265 is connected with the end cover 22, it can connect the exhaust column 261 and the end cover 22 together, so that the entire exhaust assembly 26 forms a more stable structural system. When facing external disturbances such as vibration and impact, the support 265 can effectively disperse and buffer these external forces, reduce the influence on the exhaust column 261 and other components, reduce the risk of failure caused by loose or displacement of components, and improve the reliability and durability of the exhaust assembly 26.

[0167] Continuing to refer to Figure 8 In the embodiments of the application, the exhaust assembly 26 further includes a sealing member 266, which is sleeved on the exhaust column 261 and abuts against the inner wall of the first through hole 2651 of the support 265.

[0168] In some embodiments, the sealing member 266 can have a ring structure, the inner diameter of which is adapted to the outer diameter size of the exhaust column 261, so that it can be sleeved on the exhaust column 261 to form a good fit. The outer diameter is adapted to the size of the first through hole 2651 of the support 265, so that it can be fitted with the inner wall of the first through hole 2651.

[0169] The cross-sectional shape of the sealing member 266 can be designed in various ways to meet different sealing requirements. For example, the cross-sectional shape of the sealing member 266 can be O-shaped, and the cross-section is circular, which can deform uniformly when being extruded to fill the gap between the exhaust column 261 and the inner wall of the first through hole 2651 of the support 265.

[0170] In some embodiments, in order to better fix the sealing member 266, the first through hole 2651 of the support member 265 can be a variable-diameter first through hole 2651. For example, the first through hole 2651 of the support member 265 can include two-diameter first through holes 2651, a large-diameter first through hole 2651 close to the cover body 2615 of the exhaust column 261, and a small-diameter first through hole 2651 close to the snap ring 263. That is, the large-diameter first through hole 2651 and the small-diameter first through hole 2651 can form a stepped shape, and the sealing member 266 is located at the step.

[0171] In some embodiments, the sealing member 266 can be made of a material with high elasticity, chemical corrosion resistance, and good wear resistance. For example, silicone rubber, fluororubber, and ethylene-propylene-diene rubber.

[0172] In the assembly process of the exhaust assembly 26, the sealing member 266 is first sleeved on the exhaust column 261, so that the position of the sealing member 266 on the exhaust column 261 is centered and not twisted. Then, the exhaust column 261 sleeved with the sealing member 266 is inserted into the first through hole 2651 of the support member 265, at which time the outer surface of the sealing member 266 and the inner wall of the first through hole 2651 of the support member 265 are in close contact with each other.

[0173] The position of the sealing member 266 can be close to the middle part of the first through hole 2651 of the support member 265, which can always maintain good contact between the sealing member 266 and the exhaust column 261 and the support member 265 during the movement of the exhaust column 261, thereby playing a sealing role.

[0174] In the embodiments of the present application, the sealing member 266 is sleeved on the exhaust column 261 and abuts against the inner wall of the first through hole 2651 of the support member 265, filling the gap between the exhaust column 261 and the first through hole 2651 of the support member 265, blocking the leakage of electrolyte and the intrusion of impurities from the outside, and improving the safety of the battery monomer 20. The sealing member 266 enhances the air tightness of the exhaust assembly 26, maintains the stability of the internal pressure of the battery monomer 20, and improves the stability of the battery monomer 20.

[0175] Continuing to refer to Figure 8 In the embodiments of the present application, the exhaust assembly 26 further includes an elastic member 264, which is sleeved on the exhaust column 261, and one end of the elastic member 264 abuts against the sealing member 266.

[0176] In some embodiments, the elastic member 264 can be a spiral spring structure made of a high-strength metal wire and in a hollow cylindrical shape, so as to be smoothly sleeved on the exhaust column 261.

[0177] The elastic member 264 and the sealing member 266 are arranged at the step of the support member 265.

[0178] Optionally, the elastic member 264 can also be an elastic sleeve, which is in the shape of a regular hollow cylinder and can be sleeved on the exhaust column 261. The elastic sleeve is open at both ends, so that the exhaust column 261 can pass through and will not be hindered during the reciprocating movement of the exhaust column 261.

[0179] One end of the elastic member 264 abuts against the sealing member 266, and the other end abuts against the inner side of the cover 2615 of the exhaust column 261, so that when the exhaust column 261 moves, the elastic member 264 can be deformed along the movement of the exhaust column 261.

[0180] When the internal pressure of the battery monomer 20 reaches a certain value and needs to be exhausted, the exhaust column 261 needs to move outward to open the exhaust passage 2614, and the elastic member 264 will be stretched along the movement of the exhaust column 261. During this process, the elastic force of the elastic member 264 can help the exhaust column 261 to move more smoothly, and the elastic force of the elastic member 264 can enable the exhaust column 261 to be fixed at the second position, reducing the possibility of random movement. When the exhaust is completed, the exhaust column 261 needs to move inward to the first position, and the elastic member 264 is compressed to close the exhaust passage 2614, preventing external air and impurities from entering the internal of the battery monomer 20.

[0181] In some embodiments, during the operation of the battery monomer 20, vibrations or impacts may occur due to various reasons, and these external forces will be transmitted to the exhaust column 261. The elastic member 264 can play a good buffering role to absorb and disperse the vibration and impact energy. When the vibration occurs, the elastic sleeve will be compressed, stretched, or deformed in other ways, converting the mechanical energy of the vibration into the elastic potential energy of the elastic member 264, thereby reducing the impact of the vibration on the exhaust column 261, protecting the exhaust column 261 and the entire exhaust assembly 26 from vibration damage, and prolonging the service life.

[0182] In the embodiments of the present application, the elastic member 264 is sleeved on the exhaust column 261, which can provide support for the movement of the exhaust column 261, so that the exhaust column 261 can be fixed in the support member 265 under the action of the elastic force of the elastic member 264 when it is in the first position or the second position, and provide space for the movement of the elastic member 264. The continuous abutting force of the elastic member 264 on the sealing member 266 further enhances the sealing performance between the sealing member 266 and the exhaust column 261 and the support member 265, reduces the risk of electrolyte leakage, and improves the safety and reliability of the battery monomer 20.

[0183] Continuing to refer to Figure 8 In the embodiments of the present application, the exhaust assembly 26 further comprises a limiting member 267 located between the elastic member 264 and the sealing member 266.

[0184] In some embodiments, the limiting member 267 can be a flat ring structure, with an inner diameter slightly larger than the outer diameter of the exhaust column 261, so that the exhaust column 261 can pass through smoothly, and the outer diameter is matched with the relevant dimensions of the elastic sleeve and the sealing member 266, and is installed between the elastic member 264 and the sealing member 266.

[0185] The elastic member 264, the sealing member 266 and the limiting member 267 are located at the step of the support member 265, and in the axial direction of the exhaust column 261, from the outside to the inside of the battery monomer 20, they are the elastic member 264, the limiting member 267 and the sealing member 266 in turn.

[0186] The material of the limiting member 267 can be selected from high-strength and ductile metals such as stainless steel or engineering plastics, etc.

[0187] Since the elastic member 264 and the sealing member 266 both have elasticity, direct contact will affect the extension and compression length of the elastic member 264, and thus affect the movement of the exhaust column 261. The limiting member 267 is installed between the elastic member 264 and the sealing member 266, which can provide support for the extension and compression of the elastic member 264, limit the excessive compression or stretching of the elastic member 264, and reduce the possibility of the elastic member 264 tilting due to uneven stress, so that the elastic force of the elastic member 264 always acts uniformly on the exhaust column 261 along the axial direction of the exhaust column 261.

[0188] The limiting member 267 is installed between the sealing member 266 and the elastic member 264, and the limiting member 267 and the support member 265 form a space, and the sealing member 266 is placed in this space, so that the sealing member 266 always maintains this position during the operation of the exhaust assembly 26, thereby maintaining good sealing effect.

[0189] Figure 9 Another cross-sectional view of the exhaust assembly of the embodiments of the present application is shown. As shown in the figure, the exhaust assembly 26 further includes a base 268, which is located on the side of the plugging member 262 away from the exhaust column 261, and the base 268 is used to fix the plugging member 262. Figure 9

[0190] In some embodiments, the shape and size of the base 268 are matched with the installation requirements of the plugging member 262. The central area of the base 268 can be provided with a mounting slot or a mounting hole for fixing the plugging member 262.

[0191] In some embodiments, the base 268 can be fixedly connected with the snap ring 263, and the base 268 is fixedly connected with the plugging member 262, that is, the exhaust column 261 can move in the space formed by the base 268, the snap ring 263 and the plugging member 262.

[0192] ​Exemplarily, corresponding threaded holes can be arranged on the base 268 and the blocking member 262, and the two are fastened and connected by using bolts or screws.

[0193] Exemplarily, high-temperature-resistant and chemical-corrosion-resistant glue designed for the internal chemical environment of the battery monomer 20 can be used to firmly paste the blocking member 262 on the mounting groove or mounting surface of the base 268.

[0194] In the embodiments of the present application, the base 268 is additionally arranged on the exhaust assembly 26 to fix the blocking member 262, and the base 268 provides stable support for the blocking member 262, so that the blocking member 262 always remains in the correct position and cooperates with the exhaust column 261 during the movement of the exhaust column 261. When the battery monomer 20 needs to be exhausted, the base 268 can stably support the blocking member 262 during the movement of the exhaust column 261, so as to ensure that the blocking member 262 does not displace or deform when bearing pressure, thereby maintaining the normal working state of the exhaust assembly 26.

[0195] Continuing to refer to Figure 9 The base 268 includes a bottom wall 2681, and the bottom wall 2681 includes a plurality of connecting holes 2683. The blocking member 262 is partially accommodated in the plurality of connecting holes 2683. The connecting holes 2683 include a first end face and a second end face. The first end face is located on a side away from the blocking member 262 relative to the second end face. From the first end face to the second end face, the cross-sectional area of the connecting holes 2683 in the axial direction gradually increases.

[0196] In some embodiments, the bottom wall 2681 of the base 268 is provided with a plurality of connecting holes 2683 for connecting the blocking member 262. The blocking member 262 is partially accommodated in the connecting holes 2683 and connected with the bottom wall 2681.

[0197] The connecting holes 2683 can be blind holes, and the bottom of the blocking member 262 can include a protrusion adapted to the blind holes, thereby realizing the connection between the blocking member 262 and the base 268.

[0198] In some embodiments, the connecting holes 2683 include a first end face and a second end face. The first end face is located on a side away from the blocking member 262 relative to the second end face. From the first end face to the second end face, the cross-sectional area of the connecting holes 2683 in the axial direction gradually increases, that is, the end face close to the blocking member 262 is larger. The longitudinal cross section of the connecting holes 2683 can be trapezoidal, that is, the connecting holes 2683 are circular truncated cone-shaped.

[0199] When the sealing element 262 is connected to the connecting hole 2683, the connecting hole 2683 provides lateral support to the sealing element 262 and can withstand part of the tensile force on the sealing element 262. Specifically, when the exhaust column 261 needs to exhaust air, the exhaust column 261 moves upward under the action of the tensile force. At this time, the exhaust column 261 will exert an upward tensile force on the sealing element 262. The inclined side of the connecting hole 2683 can disperse this tensile force, so that the sealing element 262 will not move with the movement of the exhaust column 261, thus maintaining the stability of the connection.

[0200] In this embodiment, the area relationship of the cross-section of the connecting hole 2683 forms a stable connection structure. The connecting hole 2683 provides auxiliary support and disperses stress from the side. This synergistic effect ensures that the connection structure between the sealing member 262 and the base 268 remains stable when subjected to external force during the use of the exhaust assembly 26, reducing the risk of the sealing member 262 coming out of the connecting hole 2683.

[0201] Figure 10 This is another cross-sectional view of the exhaust assembly according to an embodiment of this application. (Refer to...) Figure 9 and Figure 10 As shown, the base 268 also includes a side wall 2682, which surrounds the sealing member 262. A gas passage is included between the side wall 2682 and the sealing member 262. The side wall 2682 includes a plurality of second through holes 2684. When the exhaust passage 2614 is separated from the sealing member 262, the plurality of second through holes 2684 are connected to the exhaust passage 2614 through the gas passage.

[0202] In some embodiments, the base 268 includes a bottom wall 2681 and a side wall 2682, that is, the base 268 is a groove structure and the sealing member 262 is located in the groove.

[0203] The sidewall 2682 of the base 268 surrounds the sealing member 262, forming a gas channel between the sidewall 2682 and the sealing member 262. Specifically, the area of ​​the bottom wall 2681 is larger than the cross-sectional area of ​​the sealing member 262 along the axial direction, and a certain distance is left between the sealing member 262 and the sidewall 2682.

[0204] Meanwhile, a plurality of second through holes 2684 are distributed on the side wall 2682. When the exhaust passage 2614 is separated from the blocking piece 262, the gas generated inside the battery monomer 20 has an exhaust path. Specifically, the gas inside the battery monomer 20 enters the gas passage between the side wall 2682 and the blocking piece 262 through the second through holes 2684 of the side wall 2682. Since the exhaust passage 2614 is separated from the blocking piece 262, that is, there is a certain distance between the exhaust passage 2614 and the blocking piece 262, a passage is formed, which is in communication with the gas passage, so that the gas inside the battery monomer 20 enters the passage, and the passage is also in communication with the exhaust passage 2614. Therefore, the gas inside the battery monomer 20 is exhausted from the exhaust passage 2614 to the external environment.

[0205] In the embodiment of the present application, the base 268 includes a side wall 2682 surrounding the blocking piece 262, a gas passage is constructed, and a plurality of second through holes 2684 are provided. When the exhaust passage 2614 is separated from the blocking piece 262, the gas exhaust path is communicated. Not only the exhaust efficiency is improved, but also the plurality of exhaust paths are provided to quickly exhaust the gas and avoid excessive internal pressure. In addition, the gas is uniformly exhausted from different positions to maintain the internal pressure balance of the battery monomer 20 and enable the battery monomer 20 to operate safely and stably.

[0206] Figure 11 Another sectional view of the exhaust assembly of the embodiment of the present application. Figure 12 An exploded view of the exhaust assembly of the embodiment of the present application. As shown in Figure 11 As shown in Figure 12 The exhaust assembly 26 further includes a protective piece 269, which is located on the side of the exhaust column 261 away from the end cover 22 and covers the exhaust passage 2614.

[0207] In some embodiments, the protective piece 269 is located outside the cover body 2615 and covers the outlet of the exhaust passage 2614.

[0208] For example, the protective piece 269 can be a protective cap, which has a cap-shaped structure and is matched in size with the outlet of the exhaust passage 2614, so as to be closely sleeved on the end of the exhaust column 261 and completely cover the outlet of the exhaust passage 2614. The protective cap can be made of a material with certain strength and weather resistance, such as engineering plastic or metal material.

[0209] For example, the protective piece 269 can be a protective cover, which has a flat plate structure and is fixed on the side of the exhaust column 261 away from the end cover 22 by a threaded connection, a buckle connection or a magnetic attraction connection, so as to cover the outlet of the exhaust passage 2614. The area of the protective cover is slightly larger than the outlet of the exhaust passage 2614, so that the protective cover can be completely covered.

[0210] In some embodiments, the protective member 269 is detachable, which is convenient for removal when the battery monomer 20 is being exhausted. In addition, during the use of the battery monomer 20, if the protective member 269 is found to be damaged or contaminated, it can be removed for replacement or cleaning, so that the protective member 269 can maintain good protection performance.

[0211] In the embodiments of the present application, in the normal working state, the protective member 269 blocks dust, foreign matter, moisture and corrosive substances from the outside, so that they cannot enter the exhaust passage 2614. When the battery monomer 20 is being exhausted, the protective member 269 needs to be removed before the exhaust column 261 is operated.

[0212] In the embodiments of the present application, the protective member 269 covers the exhaust passage 2614, adding a dust barrier to the battery monomer 20, which can effectively block dust from adhering to the surface of the exhaust column 261, thereby reducing the possibility of dust entering the inside of the battery monomer 20 through the exhaust passage 2614, so that the exhaust assembly 26 and the battery monomer 20 can operate normally. In addition, the protective member 269 can also prevent water vapor and foreign matter from entering, maintaining the stability of the exhaust assembly 26.

[0213] In the embodiments of the present application, when the exhaust passage 2614 and the plugging member 262 are attached to each other, the exhaust assembly 26 seals the battery monomer 20 instead of the sealing pin.

[0214] When the exhaust passage 2614 and the plugging member 262 are attached to each other, the cooperation between the plugging member 262 and the exhaust column 261 achieves the plugging of the exhaust passage 2614. When the plugging member 262 is attached to the exhaust column 261, it will be elastically deformed due to the extrusion force, tightly fit the inner wall of the port of the exhaust passage 2614, and form an interference fit. The sealing effect produced by this interference fit can prevent the leakage of electrolyte inside the battery monomer 20 and the intrusion of foreign matter from the outside.

[0215] When installing the end cover 22 and the shell 21, a sealing pin is usually used to seal the battery monomer 20. The sealing pin is tightly combined with the sealing hole on the shell 21 through interference fit or threaded connection, so as to prevent the leakage of electrolyte inside the battery monomer 20 and the entry of outside air, moisture and impurities into the inside of the battery monomer 20. When interference fit is used, the diameter of the sealing pin is slightly larger than the diameter of the sealing hole, and a certain pressure needs to be applied to press the sealing pin into the sealing hole during installation, so that the sealing pin and the sealing hole form a tight contact, thereby achieving the sealing effect. When a threaded sealing pin is used, the end of the sealing pin will tightly fit the sealing washer or other components inside or at the bottom of the sealing hole during the tightening process, so as to achieve the sealing purpose.

[0216] In some embodiments, the exhaust assembly 26 can be installed in the sealing hole of the end cover 22 to replace the sealing nail for sealing the battery monomer 20. During normal operation of the battery monomer 20, the exhaust assembly 26 can realize the sealing environment inside the battery monomer 20 like the sealing nail. When the gas is generated inside the battery due to chemical reaction or other reasons, the exhaust assembly 26 can exhaust the gas to reduce the internal pressure and avoid the safety hazard caused by the high pressure.

[0217] In the embodiments of the present application, the exhaust assembly 26 replaces the sealing nail to seal the battery monomer 20, breaks the single sealing function limitation of the sealing nail, and has the function of exhausting according to the internal pressure of the battery monomer 20 while providing reliable sealing effect and effectively preventing electrolyte leakage and impurity intrusion. The risk of safety hazard caused by abnormal pressure is reduced.

[0218] According to some embodiments of the present application, the present application also provides a battery device 100, which can include a plurality of battery monomers 20 and a box 10. The box 10 contains a plurality of battery monomers 20. The battery monomer 20 includes an end cover 22 and an exhaust assembly 26. The exhaust assembly 26 is arranged on the end cover 22. The exhaust assembly 26 includes an exhaust column 261 and a blocking piece 262. The blocking piece 262 is fixed to one side of the end cover 22 facing the inside of the battery monomer 20. The exhaust column 261 includes an exhaust passage 2614. One end of the exhaust passage 2614 is arranged towards the blocking piece 262. The exhaust column 261 is configured to move along the axis direction of the exhaust column 261 to make the exhaust passage 2614 and the blocking piece 262 attached to each other or separated from each other.

[0219] It should be understood that the battery monomer 20 can also be the battery monomer 20 of any of the above embodiments.

[0220] According to some embodiments of the present application, the present application also provides a power consuming device, which can include a battery device 100 for providing electric energy. The battery device 100 includes a plurality of battery monomers 20. The battery monomer 20 includes an end cover 22 and an exhaust assembly 26. The exhaust assembly 26 is arranged on the end cover 22. The exhaust assembly 26 includes an exhaust column 261 and a blocking piece 262. The blocking piece 262 is fixed to one side of the end cover 22 facing the inside of the battery monomer 20. The exhaust column 261 includes an exhaust passage 2614. One end of the exhaust passage 2614 is arranged towards the blocking piece 262. The exhaust column 261 is configured to move along the axis direction of the exhaust column 261 to make the exhaust passage 2614 and the blocking piece 262 attached to each other or separated from each other.

[0221] The power consuming device can be any of the devices or systems using the battery device 100.

[0222] The battery cell 20 can also be the battery cell 20 of any of the above embodiments.

[0223] According to some embodiments of the present application, referring to Figures 2 to 12 The battery cell 20 provided by the present application includes an end cover 22 and an exhaust assembly 26 arranged on the end cover 22, which includes an exhaust column 261 and a blocking piece 262. The blocking piece 262 is fixed to one side of the end cover 22 facing the inside of the battery cell 20. The exhaust column 261 includes an exhaust passage 2614, one end of which is arranged towards the blocking piece 262. The exhaust column 261 is configured to move along the axial direction of the exhaust column 261 to attach or separate the exhaust passage 2614 and the blocking piece 262. The exhaust column 261 is provided with a clamping table 2610, and the exhaust assembly 26 further includes a clamping ring 263. The clamping table 2610 and the clamping ring 263 cooperate with each other to limit the movement of the exhaust column 261 in the axial direction. The clamping table 2610 is arranged in an arc shape along the circumference of the exhaust column 261. At least one side of the clamping table 2610 is provided with a first groove 2611 along the circumference of the exhaust column 261. Two sides of the clamping table 2610 are respectively provided with a second groove 2612 and a third groove 2613 in the axial direction of the exhaust column 261. The inner diameter of the clamping ring 263 is matched with the diameter of the exhaust column 261 at the second groove 2612 and the third groove 2613. The inner circumference of the clamping ring 263 is further provided with a fourth groove 2631 matched with the clamping table 2610. The second groove 2612 is located on the side of the clamping table 2610 facing the blocking piece 262, and the third groove 2613 is located on the side of the clamping table 2610 away from the blocking piece 262. The clamping ring 263 is located in the second groove 2612 of the exhaust column 261, and the clamping table 2610 of the exhaust column 261 is clamped in the clamping ring 263, so that the exhaust column 261 is limited in the first position, and the exhaust passage 2614 and the blocking piece 262 are attached to each other. The clamping ring 263 is located in the third groove 2613 of the exhaust column 261, and the clamping table 2610 of the exhaust column 261 is clamped in the clamping ring 263, so that the exhaust column 261 is limited in the second position, and the exhaust passage 2614 and the blocking piece 262 are separated from each other.

[0224] The exhaust assembly 26 further includes a support 265, a sealing piece 266, an elastic piece 264 and a limiting piece 267. The support 265 is arranged on the end cover 22, and the support 265 includes a first through hole 2651. The exhaust column 261 is arranged in the first through hole 2651. The sealing piece 266 is sleeved on the exhaust column 261 and abuts against the inner wall of the first through hole 2651 of the support 265. The elastic piece 264 is sleeved on the exhaust column 261, and one end of the elastic piece 264 abuts against the sealing piece 266 to provide elastic space for the movement of the exhaust column 261 in the axial direction. The limiting piece 267 is located between the elastic piece 264 and the sealing piece 266.

[0225] The exhaust assembly 26 further comprises a base 268 located at a side of the blocking member 262 away from the exhaust column 261, and the base 268 is used to fix the blocking member 262. The base 268 comprises a bottom wall 2681, and the bottom wall 2681 comprises a plurality of connecting holes 2683, and the blocking member 262 is partially accommodated in the plurality of connecting holes 2683. The connecting holes 2683 comprise a first end face and a second end face, and the first end face is located at a side of the second end face away from the blocking member 262. From the first end face to the second end face, the cross-sectional area of the connecting holes 2683 in the axial direction gradually increases. The base 268 further comprises a side wall 2682, and the side wall 2682 surrounds the blocking member 262. The side wall 2682 and the blocking member 262 comprise a gas passage therebetween. The side wall 2682 comprises a plurality of second through holes 2684, and the plurality of second through holes 2684 are in communication with the exhaust passage 2614 through the gas passage in the case that the exhaust passage 2614 is separated from the blocking member 262.

[0226] The exhaust assembly 26 further comprises a protection member 269 located at a side of the exhaust column 261 away from the end cover 22, and the protection member 269 covers the exhaust passage 2614. In the case that the exhaust passage 2614 is attached to the blocking member 262, the exhaust assembly 26 seals the battery monomer 20 instead of the sealing nail.

[0227] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or equivalently replace some or all of the technical features therein. Such modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the specification of the present application. In particular, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery cell, characterized in that, include: End cap (22); An exhaust assembly (26) is disposed on the end cap (22). The exhaust assembly (26) includes an exhaust column (261) and a sealing member (262). The sealing member (262) is fixed to the side of the end cap (22) facing the inside of the battery cell. The exhaust column (261) includes an exhaust channel (2614). One end of the exhaust channel (2614) is disposed facing the sealing member (262). The exhaust column (261) is configured to move along the axial direction of the exhaust column (261) so that the exhaust channel (2614) and the sealing member (262) are attached to or separated from each other.

2. The battery cell according to claim 1, characterized in that, The exhaust column (261) is provided with a locking platform (2610), and the exhaust assembly (26) further includes a retaining ring (263). The locking platform (2610) and the retaining ring (263) cooperate with each other to limit the movement of the exhaust column (261) in the axial direction.

3. The battery cell according to claim 2, characterized in that, The card holder (2610) is arranged in an arc shape along the circumference of the exhaust column (261). In the circumference of the exhaust column (261), at least one side of the card holder (2610) is provided with a first groove (2611). In the axial direction of the exhaust column (261), the two sides of the card holder (2610) are respectively provided with a second groove (2612) and a third groove (2613). The inner diameter of the retaining ring (263) is matched with the diameter of the exhaust column (261) at the second groove (2612) and the third groove (2613). The inner circumference of the retaining ring (263) is also provided with a fourth groove (2631) that matches the retaining platform (2610).

4. The battery cell according to claim 3, characterized in that, The second groove (2612) is located on the side of the card platform (2610) facing the sealing member (262), and the third groove (2613) is located on the side of the card platform (2610) away from the sealing member (262); The retaining ring (263) is located in the second groove (2612) of the exhaust column (261), and the retaining platform (2610) of the exhaust column (261) is engaged with the retaining ring (263). The exhaust column (261) is limited to the first position, and the exhaust channel (2614) is attached to the sealing member (262). The retaining ring (263) is located in the third groove (2613) of the exhaust column (261), and the retaining platform (2610) of the exhaust column (261) is engaged with the retaining ring (263). The exhaust column (261) is limited to the second position, and the exhaust channel (2614) is separated from the sealing member (262).

5. The battery cell according to any one of claims 1 to 4, characterized in that, The exhaust assembly (26) further includes an elastic element (264), which is sleeved on the exhaust column (261) and is used to provide elastic space for the movement of the exhaust column (261) in the axial direction.

6. The battery cell according to any one of claims 1 to 4, characterized in that, The exhaust assembly (26) further includes a support member (265), which is disposed on the end cap (22). The support member (265) includes a first through hole (2651), and the exhaust column (261) is disposed in the first through hole (2651).

7. The battery cell according to claim 6, characterized in that, The exhaust assembly (26) further includes a sealing element (266), which is sleeved on the exhaust column (261) and abuts against the inner wall of the first through hole (2651).

8. The battery cell according to claim 7, characterized in that, The exhaust assembly (26) further includes an elastic element (264), which is sleeved on the exhaust column (261), and one end of the elastic element (264) abuts against the sealing element (266).

9. The battery cell according to claim 8, characterized in that, The exhaust assembly (26) further includes a limiting member (267) located between the elastic member (264) and the sealing member (266).

10. The battery cell according to any one of claims 1 to 4, characterized in that, The exhaust assembly (26) also includes a base (268) located on the side of the plug (262) away from the exhaust column (261), and the base (268) is used to fix the plug (262).

11. The battery cell according to claim 10, characterized in that, The base (268) includes a bottom wall (2681), the bottom wall (2681) includes a plurality of connecting holes (2683), the sealing member (262) is partially accommodated in the plurality of connecting holes (2683), the connecting hole (2683) includes a first end face and a second end face, the first end face is located on the side of the second end face away from the sealing member (262), and the cross-sectional area of ​​the connecting hole (2683) gradually increases along the axial direction from the first end face to the second end face.

12. The battery cell according to claim 11, characterized in that, The base (268) further includes a side wall (2682) surrounding the sealing member (262). A gas passage is included between the side wall (2682) and the sealing member (262). The side wall (2682) includes a plurality of second through holes (2684). When the exhaust passage (2614) is separated from the sealing member (262), the plurality of second through holes (2684) communicate with the exhaust passage (2614) through the gas passage.

13. The battery cell according to any one of claims 1 to 4, characterized in that, The exhaust assembly (26) also includes a protective member (269) located on the side of the exhaust column (261) away from the end cap (22) and covering the exhaust passage (2614).

14. The battery cell according to any one of claims 1 to 4, characterized in that, When the venting passage (2614) and the sealing member (262) are attached to each other, the venting assembly (26) seals the battery cell instead of the sealing pin.

15. A battery device, characterized in that, include: A plurality of battery cells, wherein the battery cells include any one of claims 1-14; The housing (10) contains a plurality of the battery cells.

16. An electrical appliance, characterized in that, include: A battery device, comprising the battery device according to claim 15, the battery device being used to provide electrical energy.

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