Battery safety assembly, battery monomer, control method, battery pack and power utilization device

Abstract

The invention discloses a battery safety assembly, a battery monomer, a control method, a battery pack and a power utilization device, the battery safety assembly comprises a mounting plate, an exhaust assembly and a controller, the mounting plate is connected with a shell of the battery monomer, a containing cavity for containing a pole core is formed in the shell, the exhaust assembly is arranged on the mounting plate and comprises an exhaust valve, and the exhaust valve is connected with the controller. An exhaust channel is arranged in the exhaust valve and has a conducting state and a cut-off state, the exhaust valve can be switched between the conducting state and the cut-off state, the exhaust channel is conducted in the conducting state to communicate with the containing cavity for exhausting, and the exhaust channel is cut off in the cut-off state; the controller is electrically connected with the exhaust valve and used for controlling the exhaust valve to be switched between the on state and the off state. According to the battery safety assembly disclosed by the embodiment of the invention, the controller is used for controlling the exhaust valve to be switched between the on state and the off state, so that the battery safety assembly can be switched between the exhaust state and the state of sealing the accommodating cavity, the long-acting operation of the battery monomers is facilitated, and the safety of the battery monomers is ensured.

Description

Technical Field

[0001] The present invention relates to the field of battery technology, and in particular to a battery safety component, a battery cell and a control method, a battery pack, and an electrical device. Background Art

[0002] Battery cells, especially lithium-ion battery cells, are moving towards large-scale development. However, due to the active nature of battery cell materials, battery cells are prone to failure and thermal runaway risks during operation. The failure process is also accompanied by drastic changes in various parameters inside the battery cell, especially pressure changes.

[0003] In the prior art, in order to give an early warning of the failure of a battery cell, a detection component is only provided inside the battery cell to detect the internal parameters of the battery cell, which is not conducive to the long-term operation of the battery cell. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the first purpose of the present invention is to propose a battery safety component, which can not only ensure the sealing of the battery cell, but also connect to the accommodating cavity accommodating the pole core for exhaust, so that when the temperature inside the battery cell is too high, the pressure is too high, or the gas component content inside the battery cell is abnormal, the battery safety component can be used to exhaust, thereby ensuring the long-term operation of the battery cell and the safety of the battery cell, solving the technical problem that the prior art only detects the battery cell, but does not optimize it when the detection result is abnormal.

[0005] A second objective of the present invention is to provide a battery cell having the battery safety component.

[0006] A third objective of the present invention is to provide a battery pack having the above-mentioned battery cell.

[0007] A fourth objective of the present invention is to provide an electrical device having the above-mentioned battery pack.

[0008] A fifth objective of the present invention is to provide a control method for the battery cell.

[0009] According to an embodiment of the present invention, a battery safety component includes: a mounting plate, the mounting plate is suitable for connecting to the outer shell of a battery cell, the outer shell is provided with an accommodating cavity for accommodating an electrode core; an exhaust component, the exhaust component is arranged on the mounting plate and includes an exhaust valve, the exhaust valve is provided with an exhaust channel and the exhaust valve has an on state and a off state, the exhaust valve is switchable between the on state and the off state, in the on state the exhaust channel is turned on to be suitable for connecting to the accommodating cavity for exhaust, and in the off state the exhaust channel is cut off and disconnected; a controller, the controller is electrically connected to the exhaust valve, and the controller is used to control the exhaust valve to switch between the on state and the off state.

[0010] According to the battery safety component of the embodiment of the present invention, an exhaust valve and a controller are provided, and the exhaust valve is set to be switchable between an on state and a off state, and the controller is set to control the exhaust valve to switch between the on state and the off state. In this way, when the temperature inside the battery cell is too high, the pressure is too high, or the gas component content is abnormal, the exhaust valve can be switched to the on state by the controller to achieve exhaust through the exhaust valve, thereby avoiding failure of the battery cell due to abnormal internal parameters to a certain extent. At the same time, during the exhaust process of the exhaust valve, when the internal parameters of the battery cell return to normal values, the exhaust valve can also be switched from the on state to the off state by the controller to achieve sealing of the accommodating cavity by the mounting plate, thereby ensuring the sealing of the battery cell and ensuring the working performance of the battery cell to a certain extent, thereby enabling long-term operation of the battery cell and ensuring the safety of the battery cell.

[0011] In some embodiments, the exhaust channel has a first exhaust hole and a second exhaust hole, and the first exhaust hole and the second exhaust hole are respectively located on opposite sides of the mounting plate, and the exhaust valve can control the first exhaust hole and the second exhaust hole to be connected or disconnected, so that the exhaust valve switches between the on state and the off state.

[0012] In some embodiments, the exhaust valve includes a control valve, which is movably disposed in the exhaust passage and between the first exhaust hole and the second exhaust hole, and the control valve is used to control the connection or disconnection between the first exhaust hole and the second exhaust hole.

[0013] In some embodiments, the first exhaust hole and / or the second exhaust hole comprises a plurality of holes.

[0014] In some embodiments, a first waterproof and breathable component is further provided in the exhaust channel.

[0015] In some embodiments, the battery safety component also includes a sensor, which is electrically connected to the controller, and the sensor is used to detect at least one of the temperature, air pressure and gas component content in the housing; the controller is used to control the exhaust valve according to the detection result of the sensor.

[0016] In some embodiments, the sensor includes a temperature sensor, an air pressure sensor and a gas sensor, wherein the temperature sensor is used to detect the temperature inside the housing, the air pressure sensor is used to detect the air pressure inside the housing, and the gas sensor is used to detect the gas component content inside the housing.

[0017] In some embodiments, the controller includes a circuit board and a control unit, the circuit board is arranged on the mounting plate, and the control unit is arranged on the circuit board and is electrically connected to the circuit board, the sensor and the exhaust valve respectively.

[0018] In some embodiments, the sensor is disposed on a side of the circuit board facing the accommodating cavity.

[0019] In some embodiments, the battery safety assembly further includes a first protective member, and the first protective member is disposed on a side of the sensor facing the accommodating cavity.

[0020] In some embodiments, the first protective component is a second waterproof and breathable component.

[0021] In some embodiments, a mounting groove is provided on the mounting plate, and the circuit board is arranged in the mounting groove.

[0022] In some embodiments, a depth of the mounting groove is greater than or equal to a thickness of the circuit board.

[0023] In some embodiments, the battery safety assembly further includes a second protective member, which is disposed in the mounting groove and is located on a side of the circuit board away from the accommodating cavity.

[0024] In some embodiments, a groove depth of the mounting groove is greater than or equal to the sum of a thickness of the circuit board and a thickness of the second protective member.

[0025] In some embodiments, the battery safety assembly further includes an explosion-proof valve, which is disposed on the mounting plate and is configured to break after a set pressure is reached inside the housing to connect to the accommodating cavity.

[0026] The battery cell according to the embodiment of the present invention comprises: a shell, a receiving cavity with an opening formed in the shell; a pole core, the pole core is arranged in the receiving cavity; a battery safety component, the battery safety component is the aforementioned battery safety component, and the mounting plate is arranged at the opening.

[0027] The battery cell according to the embodiment of the present invention adopts the aforementioned battery safety component to ensure the working performance of the battery cell to a certain extent, enable the battery cell to operate for a long time, and ensure the safety of the battery cell.

[0028] A battery pack according to an embodiment of the present invention includes a plurality of the aforementioned battery cells.

[0029] The battery pack according to the embodiment of the present invention adopts the aforementioned battery cells to extend the service life of the battery pack to a certain extent, and improve the safety of the battery pack, thereby ensuring the working performance of the battery pack to a certain extent.

[0030] An electric device according to an embodiment of the present invention includes the aforementioned battery pack.

[0031] According to the electric device of the embodiment of the present invention, the working performance of the electric device can be guaranteed by adopting the aforementioned battery pack.

[0032] According to the control method of the battery cell of the embodiment of the present invention, the battery cell is the aforementioned battery cell, and the control method includes: determining that the exhaust condition is met; controlling the exhaust valve to switch to the on state; determining that the closing condition is met, and controlling the exhaust valve to switch to the off state.

[0033] According to the control method of the battery cell of the embodiment of the present invention, the exhaust valve is controlled to switch between the on state and the off state by judging whether the battery cell meets the exhaust condition and the closing condition. While realizing the exhaust by the exhaust valve, it is also convenient to use the mounting plate to seal the accommodating cavity, thereby ensuring the sealing of the battery cell and the working performance of the battery cell to a certain extent, thereby enabling the long-term operation of the battery cell and ensuring the safety of the use of the battery cell.

[0034] In some embodiments, the exhaust condition satisfies at least one of the following: the temperature inside the shell is greater than or equal to the set temperature, the air pressure inside the shell is greater than or equal to the set air pressure, and the active gas content inside the shell is greater than or equal to the set content.

[0035] In some embodiments, the closing condition is that the following conditions are met simultaneously: the temperature inside the shell is lower than a set temperature, the air pressure inside the shell is lower than a set pressure, and the active gas content inside the shell is lower than a set content.

[0036] Additional aspects and advantages of the invention will become apparent from the following description, or may be learned by practice of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0038] Figure 1 Schematic diagram of a battery safety component according to some embodiments of the present invention.

[0039] Figure 2 Exploded diagram of a battery safety component according to some embodiments of the present invention.

[0040] Figure 3 Schematic diagram of an exhaust valve according to some embodiments of the present invention.

[0041] Figure 4 An exploded view of a battery safety component according to some embodiments of the present invention from another angle.

[0042] Reference numerals:

[0043] 1000. Battery safety components;

[0044] 100. Mounting plate;

[0045] 110. Mounting slot;

[0046] 120, first mounting hole;

[0047] 130, first avoidance hole; 140, second avoidance hole; 150, third avoidance hole;

[0048] 200, exhaust assembly;

[0049] 210, exhaust valve; 211, first exhaust hole; 212, second exhaust hole;

[0050] 300, controller;

[0051] 310, circuit board; 311, second mounting hole;

[0052] 320, control unit;

[0053] 330. Wireless transmission module;

[0054] 400, sensor; 410, temperature sensor; 420, air pressure sensor; 430, gas sensor;

[0055] 500. First protective member; 600. Explosion-proof valve; 700. Pole. DETAILED DESCRIPTION

[0056] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0057] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0058] It should be noted that in the early stages of battery cell failure or thermal runaway, there is often an increase in internal temperature, an increase in air pressure, or an abnormal increase in the concentration of one or more active gases (such as hydrogen H2, carbon monoxide CO, carbon dioxide CO2, methane CH4, or ethylene C2H4, etc.). Therefore, timely removal of internal gas from the battery cell is an effective means to alleviate battery cell failure or thermal runaway.

[0059] However, in the prior art, a conventional spring-loaded exhaust valve is usually used for exhaust. The exhaust valve can only exhaust when the internal air pressure of the battery cell increases to a set air pressure value, and cannot respond promptly and effectively to changes in temperature and active gas concentration. In this way, when the internal temperature of the battery cell increases or the concentration of a certain active gas increases abnormally, the internal pressure of the battery cell will continue to increase, affecting the performance of the battery cell. In severe cases, it may cause the battery cell to explode, reducing the safety of the battery cell.

[0060] In order to solve the above problems, the present application proposes a battery safety component 1000 that can respond promptly when the temperature inside the battery cell rises, the air pressure increases, or the concentration of a certain active gas increases abnormally. The specific solution is to set an exhaust valve 210 on the battery safety component 1000, and set the exhaust valve 210 to have an on state and a cut-off state, and use a controller 300 to control the exhaust valve 210 to switch between the on state and the cut-off state. In this way, when it is detected that the temperature inside the battery cell rises, the air pressure increases, or the concentration of the active gas increases abnormally, the controller 300 can be used to control the exhaust valve 210 to switch between the on state and the cut-off state. Switching to the on state for exhaust allows the exhaust valve 210 to respond in time, which is beneficial to avoid battery cell failure to a certain extent, extend the service life of the battery cell and ensure the safety of the battery cell. At the same time, the controller 300 can be used to control the exhaust valve 210 to switch to the off state to achieve the cut-off and disconnection of the exhaust channel. At this time, the sealing of the exhaust valve 210 can be guaranteed, thereby ensuring the sealing of the mounting plate 100, making it convenient to use the mounting plate 100 to seal the accommodating cavity, ensure the sealing of the battery cell, and to a certain extent ensure the working performance of the battery cell, so that the battery cell can operate for a long time.

[0061] The battery safety component 1000 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0062] like Figure 1 and Figure 2 As shown, a battery safety assembly 1000 according to an embodiment of the present invention includes: a mounting plate 100 , a vent assembly 200 and a controller 300 .

[0063] The mounting plate 100 is suitable for connecting to the outer shell of the battery cell, and a cavity for accommodating the pole core is provided in the outer shell. By connecting the mounting plate 100 to the outer shell, the cavity for accommodating the pole core can be sealed by the mounting plate 100, which can prevent foreign matter from entering the cavity and damaging the pole core to a certain extent, and ensure the working performance of the battery cell to a certain extent.

[0064] It should be noted that the mounting plate 100 mentioned here can be a part of the shell and be integrally formed with the shell, or it can form two independent components with the shell. When the mounting plate 100 and the shell form two independent components, the mounting plate 100 and the shell can be fixedly connected by welding, bonding or bolting.

[0065] In some embodiments, the mounting plate 100 mentioned here can be understood as a cover plate of a battery cell.

[0066] like Figure 1 and Figure 2As shown, the exhaust assembly 200 is arranged on the mounting plate 100 and includes an exhaust valve 210. The exhaust valve 210 is provided with an exhaust channel and has an on state and a off state. The exhaust valve 210 can be switched between the on state and the off state. In the on state, the exhaust channel is on so as to be suitable for connecting to the accommodating cavity for exhaust. In the off state, the exhaust channel is off and disconnected. That is to say, the exhaust channel can be switched between the state of connecting to the accommodating cavity and the off and disconnected state. When the exhaust channel is on and connected to the accommodating cavity, the exhaust channel can be used for exhaust, that is, the exhaust valve 210 is used for exhaust, so as to discharge the abnormal gas inside the battery cell, which is beneficial to avoid the failure of the battery cell to a certain extent, prolong the service life of the battery cell and ensure the safety of the battery cell; when the exhaust channel is off and disconnected, the sealing of the exhaust valve 210 can be ensured, so as to ensure the sealing of the mounting plate 100, so as to realize the sealing of the accommodating cavity by the mounting plate 100, ensure the sealing of the battery cell, and ensure the working performance of the battery cell to a certain extent, so that the battery cell can operate for a long time.

[0067] Combination Figure 1 , Figure 2 and Figure 4 As shown, the controller 300 is electrically connected to the exhaust valve 210, and the controller 300 is used to control the exhaust valve 210 to switch between the on state and the off state. The exhaust valve 210 can effectively switch between the on state and the off state, reduce the difficulty of switching the exhaust valve 210, facilitate exhaust through the exhaust valve 210, and enable the exhaust valve 210 to effectively switch to the off state after the exhaust is completed, so as to seal the accommodation cavity, ensure the working performance of the battery cell to a certain extent, and then ensure the sealing of the battery cell.

[0068] It should be noted that by setting up a controller 300 to control the switching state of the exhaust valve 210, the exhaust valve 210 can be switched to the on state when the internal temperature of the battery cell is too high, the pressure is too high, or the content of a certain active gas is abnormal, thereby solving the technical problem that the spring-type exhaust valve in the prior art cannot respond to changes in temperature and active gas concentration in a timely and effective manner.

[0069] In a specific example, through the above settings, when the temperature inside the battery cell is too high, the pressure is too high, or the active gas content inside the battery cell is abnormal, the controller 300 can be used to switch the exhaust valve 210 to the on state to achieve exhaust through the exhaust valve 210, which can avoid the battery cell from failing due to abnormal internal temperature, pressure or active gas content to a certain extent. At the same time, during the exhaust process of the exhaust valve 210, when the internal temperature, pressure and active gas content of the battery cell return to normal values, the controller 300 can also be used to switch the exhaust valve 210 from the on state to the off state, so as to achieve the use of the mounting plate 100 to seal the accommodating cavity, ensure the sealing of the battery cell, and to a certain extent ensure the working performance of the battery cell, thereby enabling the long-term operation of the battery cell and ensuring the safety of the battery cell.

[0070] It can be seen from the above structure that the battery safety component 1000 of the embodiment of the present invention, by setting the exhaust valve 210 and the controller 300, and setting the exhaust valve 210 to be switchable between the on state and the off state, and using the controller 300 to control the exhaust valve 210 to switch between the on state and the off state, can achieve the use of the battery safety component 1000 to seal the battery cell while also enabling the battery safety component 1000 to exhaust when the internal temperature, pressure or active gas content of the battery cell is abnormal, so as to avoid the failure of the battery cell due to abnormal internal parameters to a certain extent, and ensure the working performance of the battery cell.

[0071] It can be understood that compared with the spring-type exhaust valve in the prior art, the battery safety component 1000 of the present application can not only exhaust when the internal pressure of the battery cell is too high, but also can use the battery safety component 1000 to exhaust when the internal temperature of the battery cell is too high or the content of a certain active gas is abnormally high, thereby ensuring the long-term operation of the battery cell and the safety of the battery cell.

[0072] It should be noted that the above-mentioned active gases include but are not limited to hydrogen H2, carbon monoxide CO, carbon dioxide CO2, methane CH4 or ethylene C2H4. When the active gas content exceeds the set value, it is easy to cause the internal temperature and pressure of the battery cell to increase, and it will also react with the battery cell, affecting the safety of the battery cell.

[0073] Therefore, when the content of hydrogen H2, carbon monoxide CO, carbon dioxide CO2, methane CH4 or ethylene C2H4 in the air content in the battery cell exceeds the set value, the controller 300 is used to control the exhaust valve 210 to switch to the on state for exhaust, thereby avoiding abnormalities in the battery cell due to increased active gas content to a certain extent, and ensuring the safety of the battery cell to a certain extent.

[0074] In some embodiments, in combination Figure 1 , Figure 2 and Figure 3 As shown, the exhaust passage has a first exhaust hole 211 and a second exhaust hole 212, and the first exhaust hole 211 and the second exhaust hole 212 are respectively located on opposite sides of the mounting plate 100, and the exhaust valve 210 can control the first exhaust hole 211 and the second exhaust hole 212 to be connected or disconnected, so that the exhaust valve 210 switches between the on state and the off state. In other words, the on state and the off state of the exhaust valve 210 are achieved by the cooperation of the first exhaust hole 211 and the second exhaust hole 212, so that the difficulty of switching the exhaust valve 210 between the on state and the off state can be reduced while ensuring the working performance of the exhaust valve 210.

[0075] In some embodiments, when the exhaust valve 210 controls the first exhaust hole 211 and the second exhaust hole 212 to be connected, the exhaust valve 210 switches to the on state, and the gas in the accommodating cavity can be discharged through the exhaust valve 210. When the exhaust valve 210 controls the first exhaust hole 211 and the second exhaust hole 212 to be disconnected, the exhaust valve 210 switches to the off state, and the mounting plate 100 can be used to seal the accommodating cavity to ensure the sealing of the battery cell.

[0076] In some embodiments, Figure 3 As shown, the exhaust valve 210 includes two cylinders, which are connected in cooperation. The exhaust valve 210 is penetrated through the mounting plate 100 so that the two cylinders are respectively located on opposite sides of the mounting plate 100, and the first exhaust hole 211 and the second exhaust hole 212 are respectively arranged on the two cylinders so that the first exhaust hole 211 and the second exhaust hole 212 are respectively located on opposite sides of the mounting plate 100, thereby facilitating exhaust by utilizing the first exhaust hole 211 and the second exhaust hole 212 to cooperate with each other to communicate with the accommodating cavity.

[0077] In some embodiments, in combination Figure 2 , Figure 3 and Figure 4 As shown, a first mounting hole 120 is provided on the mounting plate 100, and the exhaust valve 210 is provided in the first mounting hole 120, so that the exhaust valve 210 can be passed through the mounting plate 100, so that the first exhaust hole 211 and the second exhaust hole 212 can be respectively located on opposite sides of the mounting plate 100, while ensuring the working performance of the exhaust valve 210, the difficulty of assembling the exhaust valve 210 and the mounting plate 100 can also be reduced.

[0078] In some embodiments, the exhaust valve 210 includes a control valve (not shown in the figure), which is movably disposed in the exhaust passage and between the first exhaust hole 211 and the second exhaust hole 212, and is used to control the connection or disconnection of the first exhaust hole 211 and the second exhaust hole 212. The control difficulty of connecting or disconnecting the first exhaust hole 211 and the second exhaust hole 212 is reduced, so that the exhaust valve 210 can be switched between the on state and the off state, thereby reducing the switching difficulty of the exhaust valve 210 between the on state and the off state.

[0079] The movable control valve mentioned here may be movable or rotatable.

[0080] In some embodiments, the control valve can be connected to an external driver, which is used to drive the control valve to move or rotate, so as to realize the control of the connection or disconnection of the first exhaust hole 211 and the second exhaust hole 212 by the control valve, thereby reducing the difficulty of controlling the connection or disconnection of the first exhaust hole 211 and the second exhaust hole 212.

[0081] Of course, in some other embodiments, the control valve may also be arranged on the outside of the exhaust channel and connected to the exhaust channel, so that the control valve can be used to control the conduction and cutoff of the exhaust channel to achieve the purpose of controlling the exhaust valve 210 to switch between the conduction state and the cutoff state.

[0082] That is to say, it is not limited to setting the control valve between the first exhaust hole 211 and the second exhaust hole 212 to control the connection or disconnection of the first exhaust hole 211 and the second exhaust hole 212. The control valve can also be set on the outside of the exhaust channel to control the conduction and cutoff of the exhaust channel, and the purpose of controlling the exhaust valve 210 to switch between the conduction state and the cutoff state can be achieved.

[0083] Among them, when the control valve controls the exhaust channel to be turned on, the exhaust valve 210 is in a turned-on state, and the gas in the accommodating cavity can be discharged through the exhaust channel; when the control valve controls the exhaust channel to be turned off, the exhaust valve 210 is in a turned-off state, so as to realize the use of the mounting plate 100 to seal the accommodating cavity, thereby ensuring the working performance of the battery cell to a certain extent.

[0084] In some embodiments, the control valve may be disposed on the outside of the first exhaust hole 211 or the outside of the second exhaust hole 212, so that the control valve is disposed on the outside of the exhaust channel and connected to the exhaust channel, thereby reducing the difficulty of matching the control valve with the exhaust channel.

[0085] In some embodiments, Figure 3As shown, the first exhaust hole 211 and / or the second exhaust hole 212 include multiple ones. Here, it means that the first exhaust hole 211 includes multiple ones; or, the second exhaust hole 212 includes multiple ones; or, the first exhaust hole 211 and the second exhaust hole 212 both include multiple ones. The cooperation of multiple first exhaust holes 211 and / or multiple second exhaust holes 212 can increase the exhaust performance of the exhaust valve 210, thereby ensuring the safety of the battery cell to a certain extent.

[0086] In a specific example, Figure 3 As shown, the first exhaust hole 211 and the second exhaust hole 212 each include a plurality of holes to increase the exhaust performance of the exhaust valve 210 .

[0087] In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0088] In some embodiments, a first waterproof and breathable member (not shown in the figure) is further provided in the exhaust channel. The first waterproof and breathable member can, to a certain extent, prevent external water vapor from entering the battery cell through the exhaust channel to damage the performance of the battery cell when the exhaust valve 210 is in the on state, thereby ensuring the working performance of the battery cell to a certain extent and being conducive to extending the service life of the battery cell. At the same time, the first waterproof and breathable member can also avoid obstructing the exhaust of the exhaust channel itself, thereby ensuring the exhaust performance of the exhaust valve 210.

[0089] The first waterproof breathable member may be disposed inside the cylinder where the first exhaust hole 211 is located, or may be disposed inside the cylinder where the second exhaust hole 212 is located, so as to realize that the first waterproof breathable member is disposed in the exhaust channel.

[0090] Of course, in some other embodiments, the first waterproof and breathable component may also be arranged on the outside of the first exhaust hole 211 or the second exhaust hole 212 and facing the exhaust channel. In this way, the first waterproof and breathable component can also be used to a certain extent to prevent external water vapor from entering the battery cell through the exhaust channel and damaging the performance of the battery cell when the exhaust valve 210 is in the on state.

[0091] In some embodiments, the first waterproof and breathable component is formed by laminating a polytetrafluoroethylene porous micro-membrane with ordinary fabrics, so that the first waterproof and breathable component has properties such as high hydrophobicity, heat stability, corrosion resistance and air permeability. Therefore, the first waterproof and breathable component can prevent external water vapor from entering the battery cell through the exhaust channel to damage the performance of the battery cell while not affecting the exhaust of the exhaust channel.

[0092] Of course, in some other embodiments, the first waterproof and breathable component may also be a polytetrafluoroethylene component or a nylon component.

[0093] In some embodiments, the first waterproof breathable member is bonded in the exhaust channel, so that the first waterproof breathable member can be stably arranged in the exhaust channel, thereby ensuring the working performance of the first waterproof breathable member to a certain extent.

[0094] In some embodiments, the controller 300 is electrically connected to the control valve, and the controller 300 is used to control the activity of the control valve, thereby controlling the exhaust valve 210 to switch between an on state and a cutoff state, thereby reducing the difficulty of controlling the exhaust valve 210 .

[0095] In some embodiments, Figure 4 As shown, the battery safety component 1000 further includes a sensor 400, which is electrically connected to the controller 300 and is used to detect at least one of the temperature, air pressure and gas component content in the housing, so as to accurately determine the temperature, air pressure and / or gas component content in the housing, and to facilitate early warning of the failure of the battery cell, thereby ensuring the safety of the battery cell to a certain extent.

[0096] The gas component content here refers to the content of active gas inside the battery cell.

[0097] It should be noted that real-time detection of the interior of the battery cell by the sensor 400 when the battery cell is in working state is the key to ensure safe and stable operation of the battery cell.

[0098] In some embodiments, Figure 4 As shown, the controller 300 includes a wireless transmission module 330, and the wireless transmission module 330 is electrically connected to the sensor 400, so that the detection data of the sensor 400 can be transmitted by using the wireless transmission module 330, so that the user end can intuitively observe the temperature, air pressure, gas component content and other data in the shell. On the one hand, it is convenient to give early warning of the failure of the battery cell, and on the other hand, it is also convenient to maintain the pole core, which is beneficial to extend the service life of the pole core and ensure the working performance of the pole core to a certain extent.

[0099] Optionally, the controller 300 is used to control the exhaust valve 210 according to the detection result of the sensor 400. It can be understood here that the sensor 400 is electrically connected to the controller 300. On the one hand, it is convenient to use the controller 300 to control the operation of the sensor 400, so that the sensor 400 can detect at least one of the temperature, air pressure and gas component content in the shell. On the other hand, the controller 300 can control the exhaust valve 210 according to the detection result of the sensor 400, so that the exhaust valve 210 can accurately switch between the on state and the off state, and ensure that when the sensor 400 detects that one of the temperature, air pressure and gas component content in the shell is abnormal, the exhaust can be effectively exhausted through the exhaust valve 210, thereby avoiding the failure of the battery cell to a certain extent and ensuring the working performance of the battery cell.

[0100] That is to say, the battery safety component 1000 of the present application can perform real-time detection of at least one of the temperature, air pressure and gas component content inside the outer shell, and intelligently control the exhaust valve 210 according to the detection results through the controller 300 to ensure that when it is detected that the internal temperature of the battery cell is too high, the pressure is too high, or the gas component content is abnormal, the exhaust valve 210 can be controlled to actively exhaust, thereby ensuring the long-term operation and safety of the battery cell.

[0101] In a specific example, the controller 300 is used to control the operation of the sensor 400 to detect the temperature, air pressure and gas component content in the shell. After the sensor 400 completes the detection, the sensor 400 transmits the detection data to the controller 300. When the controller 300 determines that one of the temperature, air pressure and gas component content in the shell exceeds the preset value, the controller 300 controls the exhaust valve 210 to operate and switches the exhaust valve 210 to the on state. At this time, the exhaust valve 210 can be used to exhaust the gas in the battery cell. During the exhaust process of the exhaust valve 210, the sensor 400 detects in real time and transmits the detection data to the controller 300. When the controller 300 determines that the temperature, air pressure and gas component content in the shell are all within the preset value, the controller 300 controls the exhaust valve 210 to operate and switches the exhaust valve 210 to the off state to ensure the sealing of the battery cell, so as to ensure the working performance of the battery cell to a certain extent.

[0102] In some embodiments, Figure 4 As shown, the sensor 400 includes a temperature sensor 410, an air pressure sensor 420 and a gas sensor 430. The temperature sensor 410 is used to detect the temperature inside the housing, the air pressure sensor 420 is used to detect the air pressure inside the housing, and the gas sensor 430 is used to detect the gas component content inside the housing. Thus, the sensor 400 can simultaneously detect the temperature, air pressure and gas component content inside the housing, which is convenient for early warning of the failure of the battery cell and ensures the safety of the battery cell to a certain extent.

[0103] That is to say, in the present application, not only the internal air pressure of the battery cell can be monitored, but also the temperature of the battery cell, the content of active gas, etc. can be monitored, thereby realizing multi-signal monitoring of the internal temperature, pressure, gas type and concentration of the battery cell. In this way, when the battery cell has faults such as excessive temperature, excessive air pressure, or abnormal increase in the content of a certain active gas, the controller 300 can control the exhaust valve 210 to switch to the on state for timely exhaust. This can cope with and alleviate the impact of various failure conditions on the performance of the battery cell, thereby improving the safety and service life of the battery cell.

[0104] In some embodiments, the temperature sensor 410 is a thermistor temperature sensor. The working principle of the thermistor temperature sensor is that the resistance of the metal film changes linearly with the temperature. By measuring the resistance, the actual working temperature inside the shell can be reflected, thereby achieving the purpose of detecting the temperature inside the shell, reducing the difficulty of detecting the temperature inside the shell, and ensuring the accuracy of the detection to a certain extent.

[0105] Of course, in some other embodiments, the temperature sensor 410 may also be configured as a thermal-sensitive semiconductor sensor, so that the temperature sensor 410 may be used to detect the temperature inside the housing.

[0106] In some embodiments, the air pressure sensor 420 is a diffused silicon pressure sensor. The working principle of the diffused silicon pressure sensor is to utilize the elastic properties of silicon materials. The deformation caused by the air pressure causes the resistance value to change and generate an output signal, thereby achieving the purpose of detecting the air pressure in the shell, reducing the difficulty of detecting the air pressure, and ensuring the accuracy of the detection to a certain extent.

[0107] Of course, in some other embodiments, the air pressure sensor 420 may also be configured as a piezoelectric effect pressure sensor, so that the air pressure sensor 420 may be used to detect the pressure inside the housing.

[0108] In some embodiments, the gas sensor 430 is a metal oxide semiconductor field effect transistor gas sensor, whose working principle is that the gas adsorbed on the gate changes the work function of the metal, thereby changing the threshold voltage to generate an output signal, thereby achieving the purpose of using the gas sensor 430 to detect the gas content in the shell, reducing the difficulty of detecting the active gas content, and ensuring the accuracy of the detection to a certain extent.

[0109] Of course, in some other embodiments, the gas sensor 430 may also be configured as an infrared sensor.

[0110] It should be noted that the number and volume of the sensors 400 can be adaptively increased or decreased according to the requirements of the detection signal, and no specific limitation is made here.

[0111] In some embodiments, Figure 4 As shown, the controller 300 includes a circuit board 310 and a control unit 320. The circuit board 310 is arranged on the mounting plate 100. The control unit 320 is arranged on the circuit board 310 and is respectively electrically connected to the circuit board 310, the sensor 400 and the exhaust valve 210. Among them, by arranging the circuit board 310 on the mounting plate 100, the mounting plate 100 is used to support the circuit board 310, the position stability of the circuit board 310 is improved, the working performance of the circuit board 310 is guaranteed to a certain extent, and other structural members supporting the circuit board 310 are omitted, which is conducive to simplifying the structure of the battery safety component 1000 and reducing the production cost of the battery safety component 1000.

[0112] At the same time, by setting the control unit 320 on the circuit board 310, on the one hand, the control unit 320 can be set close to the circuit board 310, which is conducive to realizing the electrical connection between the control unit 320 and the circuit board 310 and reducing the difficulty of electrical connection. On the other hand, the circuit board 310 can also be used to support the control unit 320, thereby improving the position stability of the control unit 320 and ensuring the working performance of the control unit 320 to a certain extent.

[0113] In addition, by electrically connecting the control unit 320 to the circuit board 310, the sensor 400 and the exhaust valve 210 respectively, the circuit board 310 can be used to energize the control unit 320. After the control unit 320 is energized, since the control unit 320 is electrically connected to the sensor 400, the control unit 320 can be used to control the sensor 400 to work, so that the sensor 400 can detect the temperature, air pressure and gas component content in the shell, thereby ensuring the working performance of the sensor 400 to a certain extent; since the control unit 320 is electrically connected to the exhaust valve 210, the control unit 320 can be used to control the exhaust valve 210 to work, so that the exhaust valve 210 can switch between the on state and the off state, thereby enabling the exhaust valve 210 to exhaust when at least one of the temperature, air pressure and gas component content in the shell exceeds a preset value, and enabling the exhaust valve 210 to be cut off when the temperature, air pressure and gas component content in the shell are within the preset value during the exhaust process, thereby ensuring the working performance of the exhaust valve 210 to a certain extent.

[0114] In a specific example, the control unit 320 is electrically connected to the sensor 400, and the control unit 320 is used to control the operation of the sensor 400 to detect the temperature, air pressure and gas component content in the shell. After the sensor 400 completes the detection, the sensor 400 transmits the detection data to the control unit 320. When the control unit 320 determines that one of the temperature, air pressure and gas component content in the shell exceeds the preset value, the control unit 320 controls the exhaust valve 210 to operate and switches the exhaust valve 210 to the on state. At this time, the exhaust valve 210 can be used to exhaust the gas in the battery cell, and in the process of exhausting the exhaust valve 210, the sensor 400 detects in real time and transmits the detection data to the control unit 320. When the control unit 320 determines that the temperature, air pressure and gas component content in the shell are all within the preset value, the control unit 320 controls the exhaust valve 210 to operate and switches the exhaust valve 210 to the off state to ensure the sealing of the battery cell, so as to ensure the working performance of the battery cell to a certain extent.

[0115] In some embodiments, the control unit 320 is electrically connected to the control valve, and the control unit 320 is used to control the activity of the control valve, thereby controlling the exhaust valve 210 to switch between an on state and a cutoff state, thereby reducing the difficulty of controlling the exhaust valve 210 .

[0116] In some embodiments, the control unit 320 is electrically connected to the wireless transmission module 330, so that when the sensor 400 detects the temperature, air pressure and gas component content in the shell, the control unit 320 can also be used to transmit the detection data to the wireless transmission module 330. The wireless transmission module 330 is used to transmit the received data to the user end, so that the user end can intuitively observe the temperature, air pressure and gas component content in the shell, facilitate monitoring the working performance of the pole core, and extend the service life of the pole core while reducing the difficulty of maintenance of the pole core.

[0117] In some embodiments, the control unit 320 is a central processing chip to ensure the working performance of the control unit 320.

[0118] In some embodiments, in combination Figure 1 , Figure 2 and Figure 4 As shown, the circuit board 310 is arranged on the side of the mounting plate 100 away from the accommodating cavity, which can prevent the circuit board 310 from being corroded by the electrolyte to a certain extent, thereby extending the service life of the circuit board 310.

[0119] It should be noted that when the circuit board 310 is disposed on the mounting plate 100, Figure 2 , Figure 3 and Figure 4As shown, a second mounting hole 311 facing the first mounting hole 120 is provided on the circuit board 310, and the exhaust valve 210 is penetrated through the first mounting hole 120 and the second mounting hole 311, so that the first exhaust hole 211 and the second exhaust hole 212 can be respectively located on opposite sides of the mounting plate 100, which is convenient for the exhaust of the exhaust valve 210, thereby ensuring the working performance of the exhaust valve 210 to a certain extent.

[0120] That is to say, the exhaust valve 210 is connected to the mounting plate 100 through the first mounting hole 120 on the mounting plate 100 and the second mounting hole 311 on the circuit board 310, so that the first exhaust hole 211 and the second exhaust hole 212 on the exhaust valve 210 can be respectively located on opposite sides of the mounting plate 100, so that when the controller 300 determines that the battery cell needs to be exhausted, the controller 300 controls the exhaust valve 210 so that the first exhaust hole 211 and the second exhaust hole 212 are connected for exhaust.

[0121] In some embodiments, the sensor 400 is disposed on the side of the circuit board 310 facing the accommodating cavity. The sensor 400 is disposed toward the inside of the housing, so that the sensor 400 can be used to detect the temperature, air pressure, and gas component content in the housing, thereby reducing the detection difficulty of the sensor 400 and ensuring the accuracy of the detection to a certain extent. At the same time, the sensor 400 can be integrated on the circuit board 310, which is convenient for realizing the electrical connection between the control unit 320 and the sensor 400.

[0122] It should be noted that when the circuit board 310 is arranged on the side of the mounting plate 100 facing away from the accommodating cavity, placing the sensor 400 on the side of the circuit board 310 facing the accommodating cavity will cause the sensor 400 to be located between the circuit board 310 and the mounting plate 100, and the mounting plate 100 affects the detection performance of the sensor 400.

[0123] In order to solve the above problems, Figure 2 and Figure 4 As shown, the mounting plate 100 is provided with a first avoidance hole 130, a second avoidance hole 140 and a third avoidance hole 150. The first avoidance hole 130 is arranged opposite to the temperature sensor 410, the second avoidance hole 140 is arranged opposite to the air pressure sensor 420, and the third avoidance hole 150 is arranged opposite to the gas sensor 430, so that the temperature sensor 410, the air pressure sensor 420 and the gas sensor 430 can all be connected to the accommodating cavity, thereby facilitating the use of the sensor 400 to detect the temperature, air pressure and gas component content in the outer shell, reducing the detection difficulty of the sensor 400 and ensuring the accuracy of the detection to a certain extent.

[0124] It is worth noting that by providing the first avoidance hole 130 , the second avoidance hole 140 and the third avoidance hole 150 , the sensor 400 can be exposed to the internal environment of the battery cell while other components on the circuit board 310 can be prevented from contacting the internal environment of the battery cell.

[0125] In the description of the present invention, features defined as “first” or “second” may explicitly or implicitly include one or more such features, and are used to distinguish and describe the features, without any distinction in order or importance.

[0126] In some embodiments, Figure 2 and Figure 4 As shown, the battery safety component 1000 further includes a first protective member 500, which is disposed on the side of the sensor 400 facing the accommodating cavity. The first protective member 500 is disposed between the sensor 400 and the accommodating cavity, so that the first protective member 500 is conveniently used to protect the sensor 400, and to a certain extent, the electrolyte is prevented from penetrating into the sensor 400. On the one hand, the electrolyte is prevented from corroding the sensor 400, and the service life of the sensor 400 is extended. On the other hand, the electrolyte can also be prevented from affecting the real-time detection of the temperature, pressure and gas component content in the housing by the sensor 400, and to a certain extent, the working performance of the sensor 400 is guaranteed.

[0127] In some embodiments, the first protective member 500 is a second waterproof and breathable member. The waterproof and breathable member can prevent the first protective member 500 from obstructing the detection of the sensor 400 and can also prevent the electrolyte from penetrating into the sensor 400 to a certain extent, thereby ensuring the working performance of the sensor 400 to a certain extent and helping to extend the service life of the sensor 400.

[0128] In some embodiments, the second waterproof and breathable component is formed by laminating a polytetrafluoroethylene porous micro-membrane with ordinary fabrics, so that the second waterproof and breathable component has properties such as high hydrophobicity, heat stability, corrosion resistance and air permeability, so that the first protective component 500 does not affect the detection of the sensor 400, and can also prevent corrosive electrolyte or gas components from damaging other components such as the internal circuit of the sensor 400.

[0129] Of course, in some other embodiments, the second waterproof and breathable component may also be a polytetrafluoroethylene component or a nylon component.

[0130] It should be noted that because the second waterproof and breathable component can prevent the electrolyte from penetrating into the sensor 400, the electrolyte will not affect the sensor 400's real-time detection and analysis of the temperature, pressure and gas component content in the outer shell after special circumstances such as the tipping over and flipping of the battery cell, thereby enabling the exhaust valve 210 of the present application to make timely judgments on the exhaust.

[0131] In some embodiments, the first protective member 500 is formed as a waterproof and breathable membrane, which is connected to the side of the mounting plate 100 facing the accommodating cavity by physical pressing and hot melting, thereby arranging the first protective member 500 on the side of the sensor 400 facing the accommodating cavity, and facilitating the use of the mounting plate 100 to support the first protective member 500, thereby improving the position stability of the first protective member 500 and ensuring the working performance of the first protective member 500 to a certain extent.

[0132] In some embodiments, the depth of the first avoidance hole 130 matches the thickness of the temperature sensor 410, the depth of the second avoidance hole 140 matches the thickness of the air pressure sensor 420, and the depth of the third avoidance hole 150 matches the thickness of the gas sensor 430. Matching means that the depth and thickness dimensions are approximately the same. In this way, when the temperature sensor 410, the air pressure sensor 420 and the gas sensor 430 are assembled, the temperature sensor 410, the air pressure sensor 420 and the gas sensor 430 can be prevented from compressing the first protective component 500 to a certain extent, thereby ensuring the working performance of the first protective component 500.

[0133] In some embodiments, in combination Figure 1 , Figure 2 and Figure 4 As shown, the mounting plate 100 is provided with a mounting groove 110, and the circuit board 310 is arranged in the mounting groove 110. The circuit board 310 is arranged on the mounting plate 100, and the difficulty of assembling the circuit board 310 and the mounting plate 100 is reduced, so that it is convenient to support the circuit board 310 by the mounting plate 100, improve the position stability of the circuit board 310, and ensure the working performance of the circuit board 310 to a certain extent.

[0134] In some embodiments, the circuit board 310 and the mounting slot 110 are fixed by sealant to stably place the circuit board 310 in the mounting slot 110, improve the connection strength between the circuit board 310 and the mounting slot 110, thereby improving the position stability of the circuit board 310 and ensuring the working performance of the circuit board 310 to a certain extent.

[0135] Among them, the sealant mentioned here can be understood as silicone electronic potting glue.

[0136] In some embodiments, the controller 300 and the sensor 400 are both arranged on the side of the circuit board 310 facing the mounting plate 100. In this way, when the circuit board 310 and the mounting groove 110 are sealed with sealant, the controller 300 and the sensor 400 can also be encapsulated with the sealant to achieve the purpose of protecting the controller 300 and the sensor 400.

[0137] In some embodiments, the depth of the mounting groove 110 is greater than or equal to the thickness of the circuit board 310. When the circuit board 310 is arranged in the mounting groove 110, on the one hand, the circuit board 310 can be safely embedded in the mounting groove 110, which is convenient for supporting and protecting the circuit board 310 with the mounting plate 100, prolonging the service life of the circuit board 310, and improving the position stability of the circuit board 310 to a certain extent, thereby ensuring the working performance of the circuit board 310; on the other hand, it can also avoid to a certain extent the increase in the thickness of the battery safety component 1000 caused by the arrangement of the circuit board 310, that is, avoid the increase in the volume of the battery safety component 1000 caused by the arrangement of the circuit board 310, so that the battery safety component 1000 has the advantage of a small volume, and reduces the difficulty of assembling the battery safety component 1000.

[0138] In some embodiments, the battery safety assembly 1000 further includes a second protective member (not shown in the figure), which is disposed in the mounting groove 110 and located on the side of the circuit board 310 away from the accommodating cavity. The second protective member is used to encapsulate and protect the circuit board 310, extend the service life of the circuit board 310, and improve the position stability of the circuit board 310, thereby ensuring the working performance of the circuit board 310 to a certain extent.

[0139] At the same time, by arranging the second protective member in the mounting groove 110, the second protective member can be arranged close to the circuit board 310, and the second protective member can also be arranged on the mounting plate 100, so that the second protective member can be supported by the mounting plate 100, thereby improving the position stability of the second protective member and ensuring the working performance of the second protective member to a certain extent.

[0140] In some embodiments, the second protective member is disposed in the mounting groove 110 and is welded to the mounting plate 100 so as to stably mount the second protective member on the mounting plate 100, thereby improving the connection strength between the second protective member and the mounting plate 100, and thereby enabling the mounting plate 100 to stably support the second protective member, further improving the position stability of the second protective member, and ensuring the working performance of the second protective member to a certain extent, so that the second protective member can be used to effectively encapsulate and protect the circuit board 310.

[0141] Of course, in some other embodiments, the second protective member may also be bonded to the mounting plate 100 .

[0142] In some embodiments, the second protection member is formed as an aluminum alloy plate. That is, the circuit board 310 is encapsulated and protected by the aluminum alloy protection plate welded on the mounting board 100 .

[0143] The size (length and width) of the second protective member needs to be compatible with the size of the circuit board 310 so that the circuit board 310 can be effectively packaged and protected by the second protective member.

[0144] In some embodiments, the depth of the mounting groove 110 is greater than or equal to the sum of the thickness of the circuit board 310 and the thickness of the second protective member. Here, it means that when the second protective member is provided, the depth of the mounting groove 110 is set to be greater than or equal to the sum of the thickness of the circuit board 310 and the thickness of the second protective member, so that the circuit board 310 and the second protective member can be both provided in the mounting groove 110, and to a certain extent, the increase in the thickness of the battery safety component 1000 caused by the provision of the circuit board 310 and the second protective member is avoided, that is, the increase in the volume of the battery safety component 1000 caused by the provision of the circuit board 310 and the second protective member is avoided, so that the battery safety component 1000 has the advantage of a small volume, and the difficulty of assembling the battery safety component 1000 is reduced.

[0145] At the same time, by setting the groove depth of the mounting groove 110 to be greater than or equal to the sum of the thickness of the circuit board 310 and the thickness of the second protective member, it is possible to arrange both the circuit board 310 and the second protective member in the mounting groove 110, so that it is convenient to use the mounting plate 100 to support and protect the circuit board 310 and the second protective member, extend the service life of the circuit board 310 and the second protective member, and to a certain extent improve the position stability of the circuit board 310 and the second protective member, thereby ensuring the working performance of the circuit board 310 and the second protective member.

[0146] It should be noted that the present application does not limit the size and shape of the mounting plate 100 and the mounting groove 110, and can be designed to be compatible according to the shape and size of the integrated controller 300, the shape and size of the circuit board 310, and the function, shape and size of the sensor 400.

[0147] In some embodiments, Figure 1 and Figure 2 As shown, the battery safety assembly 1000 also includes an explosion-proof valve 600, which is arranged on the mounting plate 100. The explosion-proof valve 600 is configured to break after the set pressure is reached inside the shell to connect the accommodating cavity. In other words, when the gas pressure inside the shell reaches the upper limit, the explosion-proof valve 600 can be opened to exhaust gas, which can well guide the gas to be discharged from the inside of the battery cell, that is, the large amount of gas generated inside the battery cell is discharged more quickly, thereby realizing timely elimination of the explosion hazard, thereby improving the safety of the battery cell.

[0148] In a specific example, when a battery cell experiences thermal runaway and causes the internal pressure of the housing to rise rapidly, exhaust can be performed through the explosion-proof valve 600 to avoid the explosion of the battery cell to a certain extent and ensure the safety of the battery cell to a certain extent.

[0149] In summary, the present application simultaneously arranges an exhaust assembly 200 and an explosion-proof valve 600 on the mounting plate 100; the exhaust assembly 200 can conduct exhaust after the sensor 400 detects that one of the temperature, air pressure and gas component content in the outer shell exceeds a preset value, and can switch between an on state and an off state, so that the battery cell can be repeatedly used after being exhausted by the exhaust assembly 200, so as to extend the service life of the battery cell and ensure the working performance of the battery cell; the explosion-proof valve 600 is used to exhaust when the battery cell has thermal runaway and causes the internal pressure of the outer shell to rise rapidly, so as to avoid the explosion of the battery cell to a certain extent, and ensure the safety of the use of the battery cell to a certain extent.

[0150] In some embodiments, the opening pressure of the exhaust component 200 can be set to be lower than the opening pressure of the explosion-proof valve 600. In this way, when the sensor 400 detects that the air pressure in the shell exceeds the preset value, the air can be exhausted through the exhaust component 200 first. When the battery cell has thermal runaway and causes the internal pressure of the shell to rise rapidly, the air can be exhausted through the explosion-proof valve 600 to ensure the working performance of the exhaust component 200 and the explosion-proof valve 600 to a certain extent.

[0151] In some embodiments, a first assembly port (not shown in the figure) is provided on the mounting plate 100, and the explosion-proof valve 600 is provided at the first assembly port, so that the explosion-proof valve 600 can be provided on the mounting plate 100, thereby facilitating the use of the mounting plate 100 to support the explosion-proof valve 600, improving the position stability of the explosion-proof valve 600, and reducing the difficulty of matching the explosion-proof valve 600 with the mounting plate 100.

[0152] In some embodiments, Figure 1 and Figure 2 As shown, the battery safety assembly 1000 further includes a pole 700, which is disposed on the mounting plate 100. The mounting plate 100 is used to support the pole 700, thereby improving the position stability of the pole 700 and ensuring the working performance of the pole 700.

[0153] It should be noted that the pole 700 is mainly used to be electrically connected to the pole lug of the pole core, so that the current of the pole core can be drawn out by the pole 700, thereby ensuring the working performance of the pole core to a certain extent.

[0154] In some embodiments, a second assembly port (not shown in the figure) is provided on the mounting plate 100, and the pole 700 is provided at the second assembly port, so that the pole 700 can be provided on the mounting plate 100, thereby facilitating the use of the mounting plate 100 to support the pole 700, improve the position stability of the pole 700, and reduce the difficulty of matching the pole 700 with the mounting plate 100.

[0155] The pole 700 mentioned here may be a positive pole or a negative pole, which is not limited here.

[0156] Of course, in some other embodiments, two poles 700 (not shown in the example figure) may also be provided on the mounting plate 100 , and the two poles 700 respectively form a positive pole and a negative pole.

[0157] The following describes a battery cell according to an embodiment of the present invention.

[0158] A battery cell according to an embodiment of the present invention includes: a housing, a core, and a battery safety component 1000 .

[0159] The housing has an opening and a receiving cavity is formed in the housing, and the pole core is arranged in the receiving cavity, so that the pole core is arranged in the housing, and the housing is used to protect the pole core, prolong the service life of the pole core, and improve the safety of the pole core.

[0160] The battery safety component 1000 is the aforementioned battery safety component 1000. The specific structure of the battery safety component 1000 is not described here. The mounting plate 100 is arranged at the opening. The battery safety component 1000 is arranged directly opposite to the inside of the shell. In this way, when at least one of the temperature, air pressure and gas component content in the shell is detected to exceed a preset value, the exhaust component 200 can be controlled to switch to the on state for exhaust, thereby improving the safety of the battery monomer.

[0161] In summary, the battery cell of the embodiment of the present invention, by adopting the aforementioned battery safety component 1000, can ensure the working performance of the battery cell to a certain extent, enable the battery cell to operate for a long time and ensure the safety of the battery cell.

[0162] It should be noted that the shell can be formed by stamping or welding, and the material of the shell can be aluminum or steel.

[0163] A battery pack according to an embodiment of the present invention is described below.

[0164] A battery pack according to an embodiment of the present invention includes: a plurality of battery cells.

[0165] The battery cell is the aforementioned battery cell, and the specific structure of the battery cell is not described in detail here.

[0166] It can be seen from the above structure that the battery pack of the embodiment of the present invention, by adopting the aforementioned battery monomer, can extend the service life of the battery pack to a certain extent, improve the safety of the battery pack, and thus ensure the working performance of the battery pack to a certain extent.

[0167] In some embodiments, a battery pack includes a shell assembly, and multiple battery cells are arranged in the shell assembly to form a battery pack, wherein the shell assembly is mainly used to protect and support the multiple battery cells to improve the position stability of the battery cells and ensure the working performance of the battery cells. At the same time, it can also extend the service life of the battery cells and improve the safety of the use of the battery cells to further ensure the working performance of the battery pack.

[0168] The following describes an electric device according to an embodiment of the present invention.

[0169] An electric device according to an embodiment of the present invention includes: a battery pack

[0170] Among them, the battery pack is the aforementioned battery pack, and the specific structure of the battery pack is not described here.

[0171] It can be seen from the above structure that the electric device of the embodiment of the present invention, by adopting the above-mentioned battery pack, is conducive to improving the working performance of the electric device and ensuring the safety of the use of the electric device.

[0172] It should be noted that the electrical devices mentioned here may be but are not limited to mobile phones, tablets, laptops, electric toys, electric tools, battery vehicles, electric vehicles, ships, spacecraft, etc.

[0173] Among them, electric toys may include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric airplane toys; spacecraft may include airplanes, rockets, space shuttles and spacecraft; power tools include metal cutting power tools, grinding power tools, assembly power tools and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators and electric planers.

[0174] In a specific example, the power-consuming device is a vehicle such as a battery vehicle or an electric vehicle, and the vehicle can be powered by using the aforementioned battery pack.

[0175] The following describes a method for controlling a battery cell according to an embodiment of the present invention.

[0176] The battery cell is the aforementioned battery cell, and the control method of the battery cell comprises the following steps:

[0177] S1. Determine that exhaust conditions are met;

[0178] S2, control the exhaust valve 210 to switch to the on state;

[0179] S3. Determine that the closing condition is met, and control the exhaust valve 210 to switch to the cut-off state.

[0180] That is to say, the control method of the battery cell of the embodiment of the present invention first determines whether the battery cell meets the exhaust conditions when in use. When it is determined that the exhaust conditions are met, the exhaust valve 210 is controlled to switch to the on state to achieve exhaust through the exhaust valve 210, thereby avoiding failure of the battery cell due to abnormal internal temperature, pressure or active gas content to a certain extent. When it is determined that the battery cell does not meet the exhaust conditions, that is, meets the closing conditions, the exhaust valve 210 is controlled to switch to the cut-off state. At this time, the mounting plate 100 can be used to seal the accommodating cavity to ensure the sealing of the battery cell, thereby ensuring the working performance of the battery cell to a certain extent.

[0181] It can be seen from the above method that the control method of the battery cell in the embodiment of the present invention controls the exhaust valve 210 to switch between the on state and the off state by judging whether the battery cell meets the exhaust condition and the closing condition. While realizing the exhaust by using the exhaust valve 210, it is also convenient to use the mounting plate 100 to seal the accommodating cavity, thereby ensuring the sealing of the battery cell and ensuring the working performance of the battery cell to a certain extent, thereby enabling the long-term operation of the battery cell and ensuring the safety of the use of the battery cell.

[0182] In some embodiments, the exhaust condition is to satisfy at least one of the following: the temperature inside the housing is greater than or equal to the set temperature, the air pressure inside the housing is greater than or equal to the set pressure, and the active gas content inside the housing is greater than or equal to the set content. That is, when it is judged that the temperature inside the housing is greater than or equal to the set temperature, the air pressure inside the housing is greater than or equal to the set pressure, and / or the active gas content inside the housing is greater than or equal to the set content, the exhaust valve 210 is controlled to switch to the on state to achieve exhaust through the exhaust valve 210, thereby avoiding failure of the battery cell due to abnormal internal parameters to a certain extent.

[0183] Among them, the set temperature, set air pressure and set content can be set according to the performance of the battery cell, and this application does not impose any specific restrictions.

[0184] In some embodiments, the closing condition is to simultaneously meet the following conditions: the temperature inside the shell is lower than the set temperature, the air pressure inside the shell is lower than the set pressure, and the active gas content inside the shell is lower than the set content. That is, when it is judged that the temperature inside the shell is lower than the set temperature, the air pressure inside the shell is lower than the set pressure, and the active gas content inside the shell is lower than the set content, the exhaust valve 210 is controlled to switch to the cut-off state. At this time, the mounting plate 100 can be used to seal the accommodating cavity to ensure the sealing of the battery cell, and to a certain extent, ensure the working performance of the battery cell, thereby achieving long-term operation of the battery cell.

[0185] In a specific example, during the operation of the battery cell, the temperature inside the shell, the air pressure inside the shell and the active gas content inside the shell are detected by the sensor 400, and the sensor 400 transmits the detected data to the controller 300. When the controller 300 determines that the temperature inside the shell is greater than or equal to the set temperature, the air pressure inside the shell is greater than or equal to the set pressure and / or the active gas content inside the shell is greater than or equal to the set content, the controller 300 determines that the battery cell meets the exhaust condition. At this time, the controller 300 controls the exhaust valve 210 to switch to the on state for exhaust, and during the exhaust process, the sensor 400 performs real-time detection and transmits the detection data to the controller 300. When the controller 300 determines that the temperature inside the shell is lower than the set temperature, the air pressure inside the shell is lower than the set pressure and the active gas content inside the shell is lower than the set content, the controller 300 determines that the battery cell meets the closing condition. At this time, the controller 300 controls the exhaust valve 210 to switch to the off state to ensure the working performance of the battery cell and facilitate the long-term operation of the battery cell.

[0186] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0187] Figure 3 Two first exhaust holes 211 and two second exhaust holes 212 are shown for illustrative purposes, but after reading the above technical solution, ordinary technicians can obviously understand that the solution can be applied to the technical solution of three, four or more first exhaust holes 211 and second exhaust holes 212, which also falls within the protection scope of the present invention.

[0188] The specific structures of the battery safety component 1000, battery cells and control methods, battery packs, and other components of electrical devices such as the explosion-proof valve 600 according to the embodiments of the present invention are known to ordinary technicians in the field and will not be described in detail here.

[0189] In the description of this specification, the description with reference to the terms "embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0190] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery safety component, characterized in that: include: A mounting plate (100), the mounting plate (100) being suitable for connecting to a housing of a battery cell, the housing being provided with a housing cavity for housing a pole core; An exhaust assembly (200), the exhaust assembly (200) being arranged on the mounting plate (100) and comprising an exhaust valve (210), the exhaust valve (210) being provided with an exhaust passage therein and having an on state and a off state, the exhaust valve (210) being switchable between the on state and the off state, in which the exhaust passage is on so as to be connected to the accommodating cavity for exhaust, and in which the exhaust passage is off and disconnected; A controller (300) is electrically connected to the exhaust valve (210), and the controller (300) is used to control the exhaust valve (210) to switch between the on state and the off state.

2. The battery safety assembly according to claim 1, characterized in that: The exhaust channel comprises a first exhaust hole (211) and a second exhaust hole (212), wherein the first exhaust hole (211) and the second exhaust hole (212) are respectively located on two opposite sides of the mounting plate (100), and the exhaust valve (210) can control the first exhaust hole (211) and the second exhaust hole (212) to be connected or disconnected, so that the exhaust valve (210) is switched between the on state and the off state.

3. The battery safety assembly according to claim 2, characterized in that: The exhaust valve (210) comprises a control valve, which is movably arranged in the exhaust channel and located between the first exhaust hole (211) and the second exhaust hole (212), and is used to control the connection or disconnection between the first exhaust hole (211) and the second exhaust hole (212).

4. The battery safety assembly according to claim 2, characterized in that: The first exhaust hole (211) and / or the second exhaust hole (212) includes a plurality of holes.

5. The battery safety assembly according to claim 1, characterized in that: A first waterproof and breathable component is also provided in the exhaust channel.

6. The battery safety assembly according to claim 1, characterized in that: Also included is a sensor (400), the sensor (400) being electrically connected to the controller (300), the sensor (400) being used to detect at least one of the temperature, the air pressure and the gas component content in the housing; The controller (300) is used to control the exhaust valve (210) according to the detection result of the sensor (400).

7. The battery safety assembly according to claim 6, characterized in that: The sensor (400) comprises a temperature sensor (410), an air pressure sensor (420) and a gas sensor (430), wherein the temperature sensor (410) is used to detect the temperature inside the housing, the air pressure sensor (420) is used to detect the air pressure inside the housing, and the gas sensor (430) is used to detect the gas component content inside the housing.

8. The battery safety assembly according to claim 6, characterized in that: The controller (300) comprises a circuit board (310) and a control unit (320), wherein the circuit board (310) is arranged on the mounting plate (100), and the control unit (320) is arranged on the circuit board (310) and is electrically connected to the circuit board (310), the sensor (400), and the exhaust valve (210), respectively.

9. The battery safety assembly according to claim 8, characterized in that: The sensor (400) is arranged on a side of the circuit board (310) facing the accommodating cavity.

10. The battery safety assembly according to claim 9, characterized in that: It also includes a first protective member (500), wherein the first protective member (500) is arranged on a side of the sensor (400) facing the accommodating cavity.

11. The battery safety assembly according to claim 10, characterized in that: The first protective component (500) is a second waterproof and breathable component.

12. The battery safety assembly according to claim 8, characterized in that: The mounting plate (100) is provided with a mounting groove (110), and the circuit board (310) is arranged in the mounting groove (110).

13. The battery safety assembly according to claim 12, characterized in that: The groove depth of the installation groove (110) is greater than or equal to the thickness of the circuit board (310).

14. The battery safety assembly according to claim 12, characterized in that: It also includes a second protective member, which is arranged in the installation groove (110) and is located on a side of the circuit board (310) away from the accommodating cavity.

15. The battery safety assembly according to claim 14, characterized in that: The groove depth of the installation groove (110) is greater than or equal to the sum of the thickness of the circuit board (310) and the thickness of the second protective component.

16. The battery safety assembly according to claim 1, characterized in that: It also includes an explosion-proof valve (600), which is arranged on the mounting plate (100) and is configured to break after a set pressure is reached inside the housing to communicate with the accommodating chamber.

17. A battery cell, characterized in that: include: A housing having an opening formed in the housing; A pole core, the pole core is arranged in the accommodating cavity; A battery safety component, wherein the battery safety component is the battery safety component according to any one of claims 1 to 16, and the mounting plate is arranged at the opening.

18. A battery pack, characterized in that: The invention comprises a plurality of battery cells according to claim 17 .

19. An electrical device, characterized in that: Comprising a battery pack according to claim 18.

20. A method for controlling a battery cell, characterized in that: The battery cell is the battery cell according to claim 17, and the control method comprises: Determining that exhaust conditions are met; Controlling the exhaust valve to switch to the on state; It is determined that the closing condition is met, and the exhaust valve is controlled to switch to a cut-off state.

21. The control method of the battery cell according to claim 20, characterized in that: The exhaust condition is to satisfy at least one of the following: The temperature inside the shell is greater than or equal to the set temperature, the air pressure inside the shell is greater than or equal to the set air pressure, and the active gas content inside the shell is greater than or equal to the set content.

22. The method for controlling a battery cell according to claim 20, characterized in that: The closing conditions are that multiple of the following are met at the same time: The temperature inside the shell is lower than the set temperature, the air pressure inside the shell is lower than the set pressure, and the active gas content inside the shell is lower than the set content.

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