Battery safety assembly, battery cell and control method therefor, battery pack, and electric device

Abstract

A battery safety assembly (1000), a battery cell (2000) and a control method therefor, a battery pack (3000), and an electric device (10000). The battery safety assembly comprises a mounting plate (100), an exhaust assembly (200), and a controller (300). The mounting plate is connected to a casing of the battery cell; the exhaust assembly is arranged on the mounting plate and comprises an exhaust valve (210) provided with an exhaust channel; and the controller is configured to control the exhaust valve to switch between an open state and a closed state.

Description

Battery safety components, individual battery cells and control methods, battery packs, and electrical devices.

[0001] Cross-reference to related applications

[0002] This disclosure is based on and claims priority to Chinese Patent Application No. 202411205351.6, filed on August 29, 2024, entitled "Battery Safety Component, Battery Cell and Control Method, Battery Pack, Electrical Device", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure belongs to the field of battery technology, specifically a battery safety component, a battery cell and control method, a battery pack, and an electrical device. Background Technology

[0004] Battery cells, especially lithium-ion battery cells, are moving towards large-scale development. However, due to the reactive nature of battery cell materials, battery cells are prone to failure and thermal runaway during operation. The failure process is also accompanied by drastic changes in various parameters inside the battery cell, especially pressure changes.

[0005] Currently, in order to provide early warning of battery cell failure, detection components are only installed inside the battery cell to detect its internal parameters, which is not conducive to the long-term operation of the battery cell. Summary of the Invention

[0006] To address this issue, this disclosure proposes a battery safety component that not only ensures the sealing of the battery cell but also connects to the cavity containing the electrode core for venting. This allows for venting when the internal temperature, pressure, or gas composition of the battery cell is abnormal, thus ensuring the long-term operation and safety of the battery cell. This solves the problem in existing technologies where only the battery cell is tested, but no optimization is performed when the test results are abnormal.

[0007] A battery safety component according to an embodiment of this disclosure includes: a mounting plate adapted to connect to the housing of a battery cell, the housing having a receiving cavity for accommodating an electrode core; an exhaust assembly disposed on the mounting plate and including an exhaust valve, the exhaust valve having an exhaust passage and having a conducting state and a closed state, the exhaust valve being switchable between the conducting state and the closed state, wherein in the conducting state the exhaust passage is open to connect to the receiving cavity for exhaust, and in the closed state the exhaust passage is closed; and a controller electrically connected to the exhaust valve, the controller being used to control the exhaust valve to switch between the conducting state and the closed state.

[0008] According to the battery safety component of this disclosure, an exhaust valve and a controller are provided. The exhaust valve is configured to be switchable between an on and off state, and the controller is configured to control the exhaust valve to switch between the on and off states. In this way, when the internal temperature of the battery cell is too high, the pressure is too high, or the gas component content is abnormal, the controller can be used to switch the exhaust valve to the on state to exhaust gas through the exhaust valve. This can prevent the battery cell from failing due to abnormal internal parameters to a certain extent. At the same time, during the exhaust process, when the internal parameters of the battery cell return to normal, the controller can be used to switch the exhaust valve from the on state to the off state to seal the cavity with the mounting plate, ensuring the sealing of the battery cell and ensuring the working performance of the battery cell to a certain extent. This enables the long-term operation of the battery cell and ensures the safety of the battery cell in use.

[0009] Optionally, the exhaust channel has a first exhaust port and a second exhaust port, the first exhaust port and the second exhaust port are respectively located on opposite sides of the mounting plate, and the exhaust valve can control the first exhaust port and the second exhaust port to connect or disconnect, so that the exhaust valve switches between the connected state and the disconnected state.

[0010] Optionally, the exhaust valve includes a control valve, which is movably disposed within the exhaust channel and located between the first exhaust port and the second exhaust port. The control valve is used to control the connection or disconnection of the first exhaust port and the second exhaust port.

[0011] Optionally, the first vent and / or the second vent may include multiple vents.

[0012] Optionally, the exhaust channel is further provided with a first waterproof and breathable component.

[0013] Optionally, the battery safety component further includes a sensor electrically connected to the controller, the sensor being used to detect at least one of temperature, air pressure, and gas component content within the housing; the controller being used to control the exhaust valve based on the detection result of the sensor.

[0014] Optionally, the sensor includes a temperature sensor, a pressure sensor, and a gas sensor. The temperature sensor is used to detect the temperature inside the housing, the pressure sensor is used to detect the pressure inside the housing, and the gas sensor is used to detect the content of gas components inside the housing.

[0015] Optionally, the controller includes a circuit board and a control unit. The circuit board is disposed on the mounting plate, and the control unit is disposed on the circuit board and electrically connected to the circuit board, the sensor, and the exhaust valve, respectively.

[0016] Optionally, the sensor is located on the side of the circuit board facing the receiving cavity.

[0017] Optionally, the battery safety component further includes a first protective element disposed on the side of the sensor facing the receiving cavity.

[0018] Optionally, the first protective component is a second waterproof and breathable component.

[0019] Optionally, the mounting plate is provided with a mounting slot, and the circuit board is disposed in the mounting slot.

[0020] Optionally, the depth of the mounting groove is greater than or equal to the thickness of the circuit board.

[0021] Optionally, the battery safety component further includes a second protective element disposed in the mounting groove and located on the side of the circuit board opposite to the receiving cavity.

[0022] Optionally, the depth of the mounting groove is greater than or equal to the sum of the thickness of the circuit board and the thickness of the second protective element.

[0023] Optionally, the battery safety component further includes an explosion-proof valve disposed on the mounting plate, the explosion-proof valve being configured to rupture upon reaching a set pressure inside the housing to connect the receiving cavity.

[0024] A battery cell according to an embodiment of the present disclosure includes: a housing, wherein an opening is formed within the housing; an electrode core disposed within the housing; and a battery safety component, wherein the battery safety component is the aforementioned battery safety component, and a mounting plate is disposed at the opening.

[0025] According to the embodiments of this disclosure, by employing the aforementioned battery safety components, the working performance of the battery cell can be guaranteed to a certain extent, enabling the battery cell to operate for a long time and ensuring the safety of the battery cell in use.

[0026] The battery pack according to an embodiment of this disclosure includes a plurality of the aforementioned battery cells.

[0027] According to the battery pack of the present disclosure, by employing the aforementioned battery cells, the service life of the battery pack can be extended to a certain extent, and the safety of the battery pack can be improved, thereby ensuring the working performance of the battery pack to a certain extent.

[0028] The electrical device according to an embodiment of this disclosure includes the aforementioned battery pack.

[0029] According to the embodiments of this disclosure, the electrical device can ensure its working performance by using the aforementioned battery pack.

[0030] According to the control method for a battery cell in this disclosure, wherein the battery cell is the aforementioned battery cell, the control method includes: determining that the venting condition is met; controlling the venting valve to switch to the conducting state; determining that the closing condition is met, and controlling the venting valve to switch to the closing state.

[0031] According to the control method of the battery cell in this disclosure, the venting valve is controlled to switch between the on and off states by judging whether the battery cell meets the venting and closing conditions. While realizing the venting of air by venting the air, it can also facilitate the sealing of the receiving cavity by the mounting plate, ensuring the sealing of the battery cell, and to a certain extent ensuring 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 in use.

[0032] Optionally, the exhaust conditions are to satisfy at least one of the following: the temperature inside the housing is greater than or equal to a set temperature, the gas pressure inside the housing is greater than or equal to a set gas pressure, and the content of active gas inside the housing is greater than or equal to a set content.

[0033] Optionally, the shut-off condition is to simultaneously satisfy multiple of the following: the temperature inside the outer casing is lower than a set temperature, the air pressure inside the outer casing is lower than a set air pressure, and the content of active gas inside the outer casing is lower than a set content.

[0034] Additional aspects and advantages of this disclosure will become apparent from the description which follows, or may be learned by practice of this disclosure. Attached Figure Description

[0035] The above and / or additional aspects and advantages of this disclosure will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0036] Figure 1 is a schematic diagram of a battery safety component according to some embodiments of the present disclosure.

[0037] Figure 2 is an exploded view of a battery safety component according to some embodiments of this disclosure.

[0038] Figure 3 is a schematic diagram of an exhaust valve according to some embodiments of this disclosure.

[0039] Figure 4 is an exploded view from another angle of a battery safety component according to some embodiments of this disclosure.

[0040] Figure 5 is a schematic diagram of an electrical device according to some embodiments of this disclosure.

[0041] Reference numerals: 1000, Battery safety component; 100, Mounting plate; 110, Mounting slot; 120, First mounting hole; 130, First clearance hole; 140, Second clearance hole; 150, Third clearance hole; 200, Venting assembly; 210, Venting valve; 211, First vent; 212, Second vent; 300, Controller; 310, Circuit board; 311, Second mounting hole; 320, Control unit; 330, Wireless transmission module; 400, Sensor; 410, Temperature sensor; 420, Pressure sensor; 430, Gas sensor; 500, First protective component; 600, Explosion-proof valve; 700, Terminal post; 2000, Battery cell; 3000, Battery pack; 10000, Electrical device. Detailed Implementation

[0042] The embodiments of this disclosure are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this disclosure, and should not be construed as limiting this disclosure.

[0043] In the description of this disclosure, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0044] 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 gas 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). Therefore, timely removal of gas from inside the battery cell is an effective means of mitigating battery cell failure or thermal runaway.

[0045] However, in existing technologies, conventional spring-loaded exhaust valves are typically used for venting. These valves can only vent when the internal pressure of the battery cell increases to a set value. They cannot respond promptly and effectively to changes in temperature and active gas concentration. As a result, when the internal temperature of the battery cell rises or the concentration of a certain active gas rises abnormally, the internal pressure of the battery cell will continue to rise, affecting the performance of the battery cell. In severe cases, it may even cause the battery cell to explode, reducing the safety of the battery cell.

[0046] To address the aforementioned issues, this disclosure proposes a battery safety component 1000 capable of responding promptly to increases in internal temperature, pressure, or concentration of a certain active gas within the battery cell 2000. Specifically, an exhaust valve 210 is installed on the battery safety component 1000, and this valve is configured to have both an on and off state. A controller 300 controls the exhaust valve 210 to switch between these states. Thus, when an increase in internal temperature, pressure, or concentration of an active gas within the battery cell 2000 is detected, the controller 300 can control the exhaust valve 210 to switch to the on state. Venting allows the vent valve 210 to respond promptly, which helps to prevent battery cell 2000 failure to a certain extent, extends the service life of battery cell 2000, and ensures the safety of battery cell 2000 in use. At the same time, the controller 300 can control the vent valve 210 to switch to the cut-off state to realize the cut-off of the vent channel. At this time, the sealing of the vent valve 210 can be guaranteed, thereby ensuring the sealing of the mounting plate 100. It is convenient to use the mounting plate 100 to seal the receiving cavity, ensuring the sealing of battery cell 2000, and to a certain extent ensuring the working performance of battery cell 2000, so that battery cell 2000 can operate for a long time.

[0047] The battery safety component 1000 of this disclosure is described below with reference to the accompanying drawings.

[0048] As shown in Figures 1 and 2, a battery safety component 1000 according to an embodiment of the present disclosure includes: a mounting plate 100, an exhaust component 200, and a controller 300.

[0049] The mounting plate 100 is adapted to connect to the housing of the battery cell 2000, and the housing has a receiving cavity for accommodating the electrode core. By connecting the mounting plate 100 to the housing, it is easy to seal the receiving cavity for accommodating the electrode core, which to a certain extent prevents foreign objects from entering the receiving cavity and damaging the electrode core, and to a certain extent ensures the working performance of the battery cell 2000.

[0050] It should be noted that the mounting plate 100 mentioned here can be part of the outer shell and integrally formed with the outer shell, or it can be two independent parts with the outer shell. When the mounting plate 100 and the outer shell are two independent parts, the mounting plate 100 and the outer shell can be fixedly connected by welding, bonding or bolting.

[0051] In some embodiments, the mounting plate 100 referred to herein can be understood as the cover plate of the battery cell 2000.

[0052] As shown in Figures 1 and 2, the exhaust assembly 200 is disposed on the mounting plate 100 and includes an exhaust valve 210. The exhaust valve 210 has an exhaust passage and has a conducting state and a closed state. The exhaust valve 210 can be switched between the conducting state and the closed state. In the conducting state, the exhaust passage is open to connect to the receiving cavity for exhaust. In the closed state, the exhaust passage is closed and disconnected. In other words, the exhaust channel can be switched between a connected state and a cut-off state. When the exhaust channel is open and connected to the cavity, exhaust can be performed through the exhaust channel, i.e., by using the exhaust valve 210, to expel abnormal gases inside the battery cell 2000. This helps to prevent battery cell 2000 failure to a certain extent, extend the service life of the battery cell 2000, and ensure the safety of the battery cell 2000 in use. When the exhaust channel is cut off, the sealing of the exhaust valve 210 can be ensured, thereby ensuring the sealing of the mounting plate 100. This allows the mounting plate 100 to seal the cavity, ensuring the sealing of the battery cell 2000 and, to a certain extent, ensuring the working performance of the battery cell 2000, thus enabling the battery cell 2000 to operate for a long time.

[0053] As shown in Figures 1, 2, and 4, the controller 300 is electrically connected to the exhaust valve 210. The controller 300 controls the exhaust valve 210 to switch between the on and off states. This allows the exhaust valve 210 to effectively switch between the on and off states, reducing the difficulty of switching the exhaust valve 210, facilitating venting through the exhaust valve 210, and ensuring that the exhaust valve 210 can effectively switch to the off state after venting to seal the receiving cavity. This, to a certain extent, guarantees the working performance of the battery cell 2000, thereby ensuring the sealing of the battery cell 2000.

[0054] It should be noted that by setting the controller 300 to control the switching state of the exhaust valve 210, the exhaust valve 210 can be switched to the conducting state when the internal temperature of the battery cell 2000 is too high, the pressure is too high, or the content of a certain active gas is abnormal. This solves 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.

[0055] In some examples, with the above settings, when the internal temperature, pressure, or active gas content of the battery cell 2000 is too high, the controller 300 can switch the exhaust valve 210 to the on state to allow venting, thus preventing the battery cell 2000 from failing due to abnormal internal temperature, pressure, or active gas content. Furthermore, during the venting process, when the internal temperature, pressure, and active gas content of the battery cell 2000 return to normal, the controller 300 can switch the exhaust valve 210 from the on state to the off state, thereby sealing the cavity with the mounting plate 100, ensuring the sealing of the battery cell 2000, and to a certain extent guaranteeing the working performance of the battery cell 2000. This ensures the long-term operation of the battery cell 2000 and guarantees its safety in use.

[0056] As can be seen from the above structure, the battery safety component 1000 of this embodiment of the present disclosure, by setting an exhaust valve 210 and a controller 300, and setting the exhaust valve 210 to be switchable between a conducting state and a cut-off state, and using the controller 300 to control the exhaust valve 210 to switch between the conducting state and the cut-off state, can not only seal the battery cell 2000 with the battery safety component 1000, but also allow the battery cell 2000 to vent when the internal temperature, pressure or active gas content of the battery cell 2000 is abnormal, so as to avoid the battery cell 2000 from failing due to abnormal internal parameters to a certain extent and ensure the working performance of the battery cell 2000.

[0057] Understandably, compared to the spring-loaded vent valve in the prior art, the battery safety component 1000 disclosed herein can not only vent when the internal pressure of the battery cell 2000 is too high, but also when the internal temperature of the battery cell 2000 is too high or the content of a certain active gas is abnormally high, thereby ensuring the long-term operation of the battery cell 2000 and the safety of its use.

[0058] It should be noted that the active gases mentioned above include, but are not limited to, hydrogen (H2), carbon monoxide (CO), carbon dioxide (CO2), methane (CH4), or ethylene (C2H4). When the content of active gases exceeds the set value, it can easily lead to an increase in the internal temperature and pressure of the battery cell 2000, and may also react with the battery cell 2000, affecting the safety of the battery cell 2000 in use.

[0059] Therefore, when the content of hydrogen (H2), carbon monoxide (CO), carbon dioxide (CO2), methane (CH4), or ethylene (C2H4) in the air inside the battery cell 2000 exceeds the set value, the controller 300 controls the exhaust valve 210 to switch to the conducting state to exhaust gas. This avoids abnormalities caused by the increased content of active gases inside the battery cell 2000 to a certain extent, and ensures the safety of the battery cell 2000 in use to a certain extent.

[0060] In some embodiments, as shown in Figures 1, 2, and 3, the exhaust channel has a first exhaust port 211 and a second exhaust port 212, which are located on opposite sides of the mounting plate 100. The exhaust valve 210 can control the connection or disconnection of the first exhaust port 211 and the second exhaust port 212, thereby switching the exhaust valve 210 between a conducting state and a cut-off state. That is, the conducting state and the cut-off state of the exhaust valve 210 are achieved through the cooperation of the first exhaust port 211 and the second exhaust port 212. This ensures the working performance of the exhaust valve 210 while reducing the difficulty of switching the exhaust valve 210 between the conducting state and the cut-off state.

[0061] In some embodiments, when the exhaust valve 210 controls the first exhaust port 211 and the second exhaust port 212 to connect, the exhaust valve 210 switches to the conducting state, at which time the gas in the accommodating cavity can be discharged through the exhaust valve 210. When the exhaust valve 210 controls the first exhaust port 211 and the second exhaust port 212 to disconnect, the exhaust valve 210 switches to the cut-off state, at which time the mounting plate 100 can be used to seal the accommodating cavity to ensure the sealing of the battery cell 2000.

[0062] In some embodiments, as shown in FIG3, the exhaust valve 210 includes two cylinders that are connected together. The exhaust valve 210 passes through the mounting plate 100 so that the two cylinders are located on opposite sides of the mounting plate 100. The first exhaust hole 211 and the second exhaust hole 212 are respectively provided on the two cylinders, so that the first exhaust hole 211 and the second exhaust hole 212 are located on opposite sides of the mounting plate 100, thereby facilitating the use of the first exhaust hole 211 and the second exhaust hole 212 to connect the receiving cavity for exhaust.

[0063] In some embodiments, as shown in Figures 2, 3 and 4, the mounting plate 100 is provided with a first mounting hole 120, and the exhaust valve 210 is provided in the first mounting hole 120 to allow the exhaust valve 210 to pass through the mounting plate 100, so that the first exhaust hole 211 and the second exhaust hole 212 can be located on opposite sides of the mounting plate 100 respectively. While ensuring the working performance of the exhaust valve 210, the assembly difficulty of the exhaust valve 210 and the mounting plate 100 can also be reduced.

[0064] In some embodiments, the exhaust valve 210 includes a control valve (not shown), which is movably disposed within the exhaust passage and located between the first exhaust port 211 and the second exhaust port 212. The control valve is used to control the connection or disconnection of the first exhaust port 211 and the second exhaust port 212. This reduces the difficulty of controlling the connection or disconnection of the first exhaust port 211 and the second exhaust port 212, thereby enabling the exhaust valve 210 to switch between a conducting state and a cut-off state, and further reducing the difficulty of switching the exhaust valve 210 between the conducting state and the cut-off state.

[0065] The movable control valve mentioned here can be either moving or rotating.

[0066] In some embodiments, the control valve may be externally connected to a drive unit, which is used to drive the control valve to move or rotate, so as to realize the connection or disconnection of the first exhaust port 211 and the second exhaust port 212 by using the control valve, thereby reducing the difficulty of controlling the connection or disconnection of the first exhaust port 211 and the second exhaust port 212.

[0067] Of course, in some other embodiments, the control valve may also be located outside the exhaust channel and connected to the exhaust channel. In this way, the control valve can be used to control the opening and closing of the exhaust channel, so as to achieve the purpose of controlling the exhaust valve 210 to switch between the opening state and the closing state.

[0068] In other words, it is not limited to setting the control valve between the first exhaust port 211 and the second exhaust port 212 to control the connection or disconnection of the first exhaust port 211 and the second exhaust port 212. The control valve can also be set on the outside of the exhaust channel to control the opening and closing of the exhaust channel. Both can achieve the purpose of controlling the exhaust valve 210 to switch between the opening and closing states.

[0069] When the control valve controls the exhaust channel to be open, the exhaust valve 210 is in the open state, and the gas in the containment cavity can be discharged through the exhaust channel; when the control valve controls the exhaust channel to be closed, the exhaust valve 210 is in the closed state, so as to achieve the sealing of the containment cavity by the mounting plate 100, and to a certain extent ensure the working performance of the battery cell 2000.

[0070] In some embodiments, the control valve may be located outside the first exhaust port 211 or outside the second exhaust port 212, so as to realize that the control valve is located outside the exhaust channel and connected to the exhaust channel, thereby reducing the difficulty of coordinating the control valve with the exhaust channel.

[0071] In some embodiments, as shown in FIG3, the first vent 211 and / or the second vent 212 may include multiple vents. This means that the first vent 211 may include multiple vents; or, the second vent 212 may include multiple vents; or both the first vent 211 and the second vent 212 may include multiple vents. The cooperation of multiple first vents 211 and / or multiple second vents 212 can increase the venting performance of the vent valve 210, thereby ensuring the safety of the battery cell 2000 to a certain extent.

[0072] In some examples, as shown in Figure 3, both the first vent 211 and the second vent 212 include multiple ports to increase the exhaust performance of the exhaust valve 210.

[0073] In the description of this disclosure, unless otherwise stated, "multiple" means two or more.

[0074] In some embodiments, a first waterproof and breathable component (not shown in the figure) is also provided in the exhaust channel. The first waterproof and breathable component can, to a certain extent, prevent external water vapor from entering the battery cell 2000 through the exhaust channel when the exhaust valve 210 is in the conducting state, thus preventing damage to the performance of the battery cell 2000. This ensures the working performance of the battery cell 2000 to a certain extent and helps to extend the service life of the battery cell 2000. At the same time, the first waterproof and breathable component can also prevent itself from obstructing the exhaust channel, ensuring the exhaust performance of the exhaust valve 210.

[0075] The first waterproof and breathable component can be located inside the cylinder where the first vent 211 is located, or it can be located inside the cylinder where the second vent 212 is located, so that the first waterproof and breathable component can be located in the venting channel.

[0076] Of course, in some other embodiments, the first waterproof and breathable component may also be located outside the first vent 211 or the second vent 212 and directly opposite the vent channel. In this way, the first waterproof and breathable component can be used to a certain extent to prevent external water vapor from entering the battery cell 2000 through the vent channel and damaging the performance of the battery cell 2000 when the vent valve 210 is in the conducting state.

[0077] In some embodiments, the first waterproof and breathable component is made of polytetrafluoroethylene porous micromembrane laminated with ordinary fabric, which gives the first waterproof and breathable component high hydrophobicity, heat resistance, corrosion resistance and breathability, so that the first waterproof and breathable component can prevent external water vapor from entering the battery cell 2000 through the exhaust channel and damaging the performance of the battery cell 2000 without affecting the exhaust channel.

[0078] Of course, in some other embodiments, the first waterproof and breathable component may also be a polytetrafluoroethylene component or a nylon component, etc.

[0079] In some embodiments, the first waterproof and breathable component is bonded to the exhaust channel so that the first waterproof and breathable component can be stably disposed in the exhaust channel, thereby ensuring the working performance of the first waterproof and breathable component to a certain extent.

[0080] In some embodiments, the controller 300 is electrically connected to the control valve and is used to control the movement of the control valve, thereby enabling the control exhaust valve 210 to switch between the on and off states, reducing the control difficulty of the exhaust valve 210.

[0081] In some embodiments, as shown in FIG4, the battery safety component 1000 further includes a sensor 400, which is electrically connected to the controller 300. The sensor 400 is used to detect at least one of temperature, air pressure, and gas component content inside the casing. This facilitates accurate determination of temperature, air pressure, and / or gas component content inside the casing, enabling early warning of battery cell 2000 failure and ensuring the safety of battery cell 2000 to a certain extent.

[0082] The gas component content mentioned here refers to the content of active gas inside the battery cell 2000.

[0083] It should be noted that real-time detection of the internal structure of the battery cell 2000 by sensor 400 during the working state of the battery cell 2000 is the key to ensuring the safe and stable operation of the battery cell 2000.

[0084] In some embodiments, as shown in FIG4, the controller 300 includes a wireless transmission module 330, which is electrically connected to the sensor 400 to transmit the detection data of the sensor 400. This allows the user to intuitively observe data such as temperature, air pressure, and gas composition content inside the casing. On the one hand, this facilitates early warning of battery cell 2000 failure, and on the other hand, it facilitates the maintenance of the electrode core, which helps to extend the service life of the electrode core and, to a certain extent, ensures the working performance of the electrode core.

[0085] Optionally, the controller 300 controls the exhaust valve 210 based on the detection results of the sensor 400. This can be understood as follows: electrically connecting the sensor 400 to the controller 300 facilitates the controller 300's control of the sensor 400, enabling it to detect at least one of the following: temperature, pressure, and gas component content within the casing. Furthermore, it allows the controller 300 to control the exhaust valve 210 based on the sensor 400's detection results, ensuring that the exhaust valve 210 accurately switches between on and off states. This ensures that when the sensor 400 detects an anomaly in any of the following—temperature, pressure, or gas component content—exhaust is effectively vented through the exhaust valve 210, thus mitigating battery cell 2000 failure and guaranteeing its performance.

[0086] In other words, the battery safety component 1000 disclosed herein can detect at least one of the temperature, air pressure and gas component content inside the casing in real time, and intelligently control the exhaust valve 210 according to the detection results through the controller 300, so as to ensure that when the internal temperature of the battery cell 2000 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 2000.

[0087] In some examples, the controller 300 controls the sensor 400 to detect the temperature, pressure, and gas composition content inside the casing. After the sensor 400 completes its detection, it transmits the data to the controller 300. When the controller 300 determines that one of the temperature, pressure, or gas composition content inside the casing exceeds a preset value, the controller 300 controls the exhaust valve 210 to operate and switches it to the on state. At this time, the exhaust valve 210 can be used to vent the gas inside the battery cell 2000. During the venting process of the exhaust valve 210, the sensor 400 detects the gas in real time and transmits the data to the controller 300. When the controller 300 determines that the temperature, pressure, and gas composition content inside the casing are all within the preset values, the controller 300 controls the exhaust valve 210 to operate and switches it to the off state to ensure the sealing of the battery cell 2000 and thus guarantee its performance to a certain extent.

[0088] In some embodiments, as shown in FIG4, the sensor 400 includes a temperature sensor 410, a pressure sensor 420, and a gas sensor 430. The temperature sensor 410 is used to detect the temperature inside the casing, the pressure sensor 420 is used to detect the pressure inside the casing, and the gas sensor 430 is used to detect the content of gas components inside the casing. This allows the sensor 400 to simultaneously detect the temperature, pressure, and gas component content inside the casing, facilitating early warning of battery cell 2000 failure and ensuring the safety of battery cell 2000 operation to a certain extent.

[0089] In other words, this disclosure not only monitors the internal air pressure of the battery cell 2000, but also monitors the temperature and active gas content of the battery cell 2000. This enables multi-signal monitoring of the internal temperature, pressure, gas type and concentration of the battery cell 2000. When the battery cell 2000 experiences faults such as excessive temperature, excessive air pressure, or abnormally high content of a certain active gas, the controller 300 can control the exhaust valve 210 to switch to the conducting state for timely exhaust. This can address and mitigate the impact of various failure conditions on the performance of the battery cell 2000, thereby improving the safety and service life of the battery cell 2000.

[0090] In some embodiments, the temperature sensor 410 is a resistance temperature sensor. The working principle of the resistance temperature sensor is that the resistance of the metal thin film changes linearly with temperature. By measuring the resistance, the actual working temperature inside the housing can be reflected, thereby achieving the purpose of detecting the temperature inside the housing, reducing the difficulty of detecting the temperature inside the housing, and ensuring the accuracy of detection to a certain extent.

[0091] Of course, in some other embodiments, the temperature sensor 410 may also be configured as a thermistor semiconductor sensor, which can also be used to detect the temperature inside the housing.

[0092] In some embodiments, the 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 material. The deformation caused by air pressure causes a change in resistance value, generating an output signal, thereby achieving the purpose of detecting the air pressure inside the shell, reducing the difficulty of air pressure detection, and ensuring the accuracy of detection to a certain extent.

[0093] Of course, in some other embodiments, the pressure sensor 420 can also be configured as a piezoelectric pressure sensor, which can also be used to detect the pressure inside the housing.

[0094] In some embodiments, the gas sensor 430 is a metal-oxide-semiconductor field-effect transistor gas sensor. Its working principle is that the gas adsorbed on the gate changes the work function of the metal, thereby changing the threshold voltage and generating an output signal. This achieves the purpose of using the gas sensor 430 to detect the gas content inside the casing, reducing the difficulty of detecting the content of active gases and ensuring the accuracy of detection to a certain extent.

[0095] Of course, in some other embodiments, the gas sensor 430 may also be configured as an infrared sensor.

[0096] It should be noted that the number and size of the sensors 400 can be adaptively increased or decreased according to the needs of the detection signal, and no specific restrictions are imposed here.

[0097] In some embodiments, as shown in FIG4, the controller 300 includes a circuit board 310 and a control unit 320. The circuit board 310 is disposed on the mounting plate 100, and the control unit 320 is disposed on the circuit board 310 and electrically connected to the circuit board 310, the sensor 400, and the exhaust valve 210, respectively. By placing the circuit board 310 on the mounting plate 100, the mounting plate 100 supports the circuit board 310, improving the positional stability of the circuit board 310 and ensuring its working performance to a certain extent. Furthermore, it eliminates the need for other structural components to support the circuit board 310, simplifying the structure of the battery safety component 1000 and reducing its production cost.

[0098] Meanwhile, by placing the control unit 320 on the circuit board 310, on the one hand, the control unit 320 can be placed 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, improve the positional stability of the control unit 320, and ensure the working performance of the control unit 320 to a certain extent.

[0099] Furthermore, 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 power the control unit 320. After the control unit 320 is powered on, since it is electrically connected to the sensor 400, the control unit 320 can control the sensor 400 to work, enabling the sensor 400 to detect the temperature, air pressure, and gas component content inside the housing, thus 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 control the exhaust valve 210 to work, allowing the exhaust valve 210 to switch between a conducting state and a cut-off state. This allows the exhaust valve 210 to exhaust when at least one of the temperature, air pressure, and gas component content inside the housing exceeds a preset value, and to cut off the exhaust valve 210 when the temperature, air pressure, and gas component content inside the housing are within the preset values ​​during the exhaust process, thus ensuring the working performance of the exhaust valve 210 to a certain extent.

[0100] In some examples, the control unit 320 is electrically connected to the sensor 400. The control unit 320 controls the sensor 400 to operate in order to detect the temperature, air pressure, and gas component content inside the casing. After the sensor 400 completes its detection, it transmits the detected data to the control unit 320. When the control unit 320 determines that one of the temperature, air pressure, or gas component content inside the casing exceeds a 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 vent the gas inside the battery cell 2000. During the venting process of the exhaust valve 210, the sensor 400 detects in real time and transmits the detected data to the control unit 320. When the control unit 320 determines that the temperature, air pressure, and gas component content inside the casing are all within the preset values, 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 2000 and thus ensure the working performance of the battery cell 2000 to a certain extent.

[0101] In some embodiments, the control unit 320 is electrically connected to the control valve and is used to control the movement of the control valve, thereby enabling the control exhaust valve 210 to switch between the on and off states, reducing the control difficulty of the exhaust valve 210.

[0102] In some embodiments, the control unit 320 is electrically connected to the wireless transmission module 330. Thus, when the sensor 400 detects the temperature, air pressure, and gas composition content inside the housing, the control unit 320 can transmit the detected data to the wireless transmission module 330. The wireless transmission module 330 is used to transmit the received data to the user terminal, so that the user terminal can intuitively observe the temperature, air pressure, and gas composition content inside the housing, which is convenient for monitoring the working performance of the electrode core. This not only extends the service life of the electrode core but also helps to reduce the maintenance difficulty of the electrode core.

[0103] In some embodiments, the control unit 320 is a central processing chip, which ensures the working performance of the control unit 320.

[0104] In some embodiments, as shown in Figures 1, 2 and 4, the circuit board 310 is disposed on the side of the mounting plate 100 away from the receiving cavity, which can, to a certain extent, prevent the electrolyte from corroding the circuit board 310 and extend the service life of the circuit board 310.

[0105] It should be noted that when the circuit board 310 is mounted on the mounting plate 100, as shown in Figures 2, 3 and 4, the circuit board 310 is provided with a second mounting hole 311 facing the first mounting hole 120. The exhaust valve 210 passes 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 located on opposite sides of the mounting plate 100, which facilitates the exhaust of the exhaust valve 210 and thus ensures the working performance of the exhaust valve 210 to a certain extent.

[0106] In other words, 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 located on opposite sides of the mounting plate 100 respectively. Thus, when the controller 300 determines that the battery cell 2000 needs to be vented, the controller 300 controls the exhaust valve 210 to connect the first exhaust hole 211 and the second exhaust hole 212 to vent.

[0107] In some embodiments, the sensor 400 is disposed on the side of the circuit board 310 facing the receiving cavity. This arrangement allows the sensor 400 to face the interior of the housing, facilitating the detection of temperature, air pressure, and gas composition content within the housing. This reduces the difficulty of detection by the sensor 400 and ensures accuracy to a certain extent. Furthermore, integrating the sensor 400 onto the circuit board 310 facilitates electrical connection between the control unit 320 and the sensor 400.

[0108] It should be noted that when the circuit board 310 is located on the side of the mounting plate 100 away from the receiving cavity, placing the sensor 400 on the side of the circuit board 310 facing the receiving cavity will cause the sensor 400 to be located between the circuit board 310 and the mounting plate 100, and the mounting plate 100 will affect the detection performance of the sensor 400.

[0109] To address the aforementioned issues, as shown in Figures 2 and 4, the mounting plate 100 is provided with a first clearance hole 130, a second clearance hole 140, and a third clearance hole 150. The first clearance hole 130 is positioned directly opposite the temperature sensor 410, the second clearance hole 140 is positioned directly opposite the pressure sensor 420, and the third clearance hole 150 is positioned directly opposite the gas sensor 430. This allows the temperature sensor 410, the pressure sensor 420, and the gas sensor 430 to all be connected to the receiving cavity, thereby facilitating the detection of temperature, pressure, and gas composition content within the housing using the sensor 400. This reduces the detection difficulty of the sensor 400 and, to a certain extent, ensures the accuracy of the detection.

[0110] It is worth noting that by setting the first clearance hole 130, the second clearance hole 140 and the third clearance hole 150, the sensor 400 can be exposed to the internal environment of the battery cell 2000, while other components on the circuit board 310 can be prevented from contacting the internal environment of the battery cell 2000.

[0111] In the description of this disclosure, features marked with "first" or "second" may explicitly or implicitly include one or more of the same feature, used to distinguish and describe features, without any order or distinction of importance.

[0112] In some embodiments, as shown in Figures 2 and 4, the battery safety component 1000 further includes a first protective element 500, which is disposed on the side of the sensor 400 facing the receiving cavity. This arrangement allows the first protective element 500 to be positioned between the sensor 400 and the receiving cavity, facilitating the protection of the sensor 400 and preventing electrolyte from seeping into it. This avoids corrosion of the sensor 400 by the electrolyte, extending its service life, and also prevents the electrolyte from affecting the sensor 400's real-time detection of temperature, pressure, and gas composition within the housing, thus ensuring the sensor 400's performance to a certain extent.

[0113] In some embodiments, the first protective element 500 is a second waterproof and breathable element. While preventing the first protective element 500 from obstructing the sensor 400's detection, the waterproof and breathable element can also prevent electrolyte from seeping 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.

[0114] In some embodiments, the second waterproof and breathable component is made of polytetrafluoroethylene porous microfilm laminated with ordinary fabric, which gives the second waterproof and breathable component high hydrophobicity, heat resistance, corrosion resistance and breathability, so that the first protective component 500 can prevent corrosive electrolyte or gas components from damaging the internal circuits and other components of the sensor 400 without affecting the detection of the sensor 400.

[0115] Of course, in some other embodiments, the second waterproof and breathable component may also be a polytetrafluoroethylene component or a nylon component, etc.

[0116] It should be noted that, because the second waterproof and breathable component can prevent electrolyte from seeping into the sensor 400, the electrolyte will not affect the sensor 400's real-time detection and analysis of temperature, pressure and gas composition content inside the housing after special operations such as tilting or flipping the battery cell 2000. This allows the exhaust valve 210 of this disclosure to make timely judgments on exhaust.

[0117] In some embodiments, the first protective member 500 is formed as a waterproof and breathable membrane. The waterproof and breathable membrane is connected to the side of the mounting plate 100 facing the receiving cavity by physical pressing and heat fusion, thereby enabling the first protective member 500 to be placed on the side of the sensor 400 facing the receiving cavity, and facilitating the use of the mounting plate 100 to support the first protective member 500, improving the positional stability of the first protective member 500, and ensuring the working performance of the first protective member 500 to a certain extent.

[0118] In some embodiments, the depth of the first clearance hole 130 matches the thickness of the temperature sensor 410, the depth of the second clearance hole 140 matches the thickness of the pressure sensor 420, and the depth of the third clearance hole 150 matches the thickness of the gas sensor 430. Matching means that the depth and thickness are approximately the same. In this way, after the temperature sensor 410, pressure sensor 420 and gas sensor 430 are assembled, the pressure sensor 410, pressure sensor 420 and gas sensor 430 can be prevented from pressing on the first protective member 500 to a certain extent, thus ensuring the working performance of the first protective member 500.

[0119] In some embodiments, as shown in Figures 1, 2, and 4, the mounting plate 100 is provided with a mounting groove 110, and the circuit board 310 is disposed in the mounting groove 110. This allows the circuit board 310 to be disposed on the mounting plate 100, reducing the assembly difficulty between the circuit board 310 and the mounting plate 100, thereby facilitating the use of the mounting plate 100 to support the circuit board 310, improving the positional stability of the circuit board 310, and ensuring the working performance of the circuit board 310 to a certain extent.

[0120] In some embodiments, the circuit board 310 is fixed to the mounting groove 110 with sealant to stabilize the circuit board 310 in the mounting groove 110, thereby improving the connection strength between the circuit board 310 and the mounting groove 110, thus improving the positional stability of the circuit board 310 and ensuring the working performance of the circuit board 310 to a certain extent.

[0121] The sealant mentioned here can be understood as silicone electronic potting compound.

[0122] In some embodiments, the controller 300 and the sensor 400 are both located on the side of the circuit board 310 facing the mounting plate 100. When the circuit board 310 and the mounting groove 110 are sealed together with sealant, the controller 300 and the sensor 400 can also be encapsulated with sealant to protect the controller 300 and the sensor 400.

[0123] 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 placed within the mounting groove 110, it allows for safe embedding of the circuit board 310, facilitating support and protection of the circuit board 310 by the mounting plate 100, extending its service life, and improving its positional stability to a certain extent, thereby ensuring its performance. Furthermore, it avoids increasing the thickness of the battery safety component 1000 due to the circuit board 310, thus preventing an increase in its volume and allowing for a smaller size, reducing the assembly difficulty of the battery safety component 1000.

[0124] In some embodiments, the battery safety component 1000 further includes a second protective element (not shown in the figure), which is disposed in the mounting groove 110 and located on the side of the circuit board 310 opposite to the receiving cavity. This is to achieve the purpose of encapsulating and protecting the circuit board 310 using the second protective element, extending the service life of the circuit board 310, improving the positional stability of the circuit board 310, and ensuring the working performance of the circuit board 310 to a certain extent.

[0125] Meanwhile, by placing the second protective component in the mounting groove 110, the second protective component can be placed close to the circuit board 310, and the second protective component can also be placed on the mounting plate 100 to support the second protective component, thereby improving the positional stability of the second protective component and ensuring its working performance to a certain extent.

[0126] In some embodiments, the second protective member is disposed in the mounting groove 110 and welded to the mounting plate 100 to stably place 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 enabling the mounting plate 100 to stably support the second protective member, further improving the positional 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 effectively encapsulate and protect the circuit board 310.

[0127] Of course, in some other embodiments, the second protective element may also be bonded to the mounting plate 100.

[0128] In some embodiments, the second protective element is formed as an aluminum alloy plate. That is, the circuit board 310 is encapsulated and protected by an aluminum alloy protective plate soldered onto the mounting plate 100.

[0129] The dimensions (length and width) of the second protective component need to be compatible with the dimensions of the circuit board 310 so that the circuit board 310 can be effectively encapsulated and protected using the second protective component.

[0130] 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. This 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. This allows both the circuit board 310 and the second protective member to be housed within the mounting groove 110, thus avoiding an increase in the thickness of the battery safety component 1000 due to the installation of the circuit board 310 and the second protective member. In other words, it avoids increasing the volume of the battery safety component 1000 by installing the circuit board 310 and the second protective member, giving the battery safety component 1000 a smaller size and reducing the assembly difficulty of the battery safety component 1000.

[0131] Meanwhile, by setting the 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 component, the circuit board 310 and the second protective component can both be placed in the mounting groove 110. This facilitates the use of the mounting plate 100 to support and protect the circuit board 310 and the second protective component, extends the service life of the circuit board 310 and the second protective component, and improves the positional stability of the circuit board 310 and the second protective component to a certain extent, thereby ensuring the working performance of the circuit board 310 and the second protective component.

[0132] It should be noted that this disclosure does not limit the size and shape of the mounting plate 100 and the mounting groove 110, and can be designed to be compatible with 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.

[0133] In some embodiments, as shown in Figures 1 and 2, the battery safety component 1000 further includes an explosion-proof valve 600, which is disposed on the mounting plate 100. The explosion-proof valve 600 is configured to rupture upon reaching a set pressure inside the housing to connect the receiving cavity. That is, when the gas pressure inside the housing reaches its upper limit, the explosion-proof valve 600 can open to release gas, effectively guiding the gas out of the battery cell 2000. This allows for faster discharge of the large amount of gas generated inside the battery cell 2000, thereby promptly eliminating the risk of explosion and improving the safety of the battery cell 2000.

[0134] In some examples, when the battery cell 2000 experiences thermal runaway, causing the internal pressure of the casing to rise rapidly, the explosion-proof valve 600 can be used to release the gas, thereby preventing the battery cell 2000 from exploding to a certain extent and ensuring the safety of the battery cell 2000 in use.

[0135] In summary, this disclosure provides both an exhaust assembly 200 and an explosion-proof valve 600 on the mounting plate 100. The exhaust assembly 200 can vent after the sensor 400 detects that one of the temperature, air pressure, or gas component content inside the casing exceeds a preset value. It can also switch between an on and off state, allowing the battery cell 2000 to be reused after being vented by the exhaust assembly 2000, thereby extending the service life of the battery cell 2000 and ensuring its working performance. The explosion-proof valve 600 is used to vent when the battery cell 2000 experiences thermal runaway, causing a rapid increase in internal pressure, in order to prevent the battery cell 2000 from exploding to a certain extent and ensure the safety of the battery cell 2000 in use.

[0136] In some embodiments, the opening pressure of the exhaust assembly 200 can be set to be less than the opening pressure of the explosion-proof valve 600. In this way, when the sensor 400 detects that the air pressure inside the housing exceeds the preset value, the exhaust assembly 200 can be used to vent the air first. When the battery cell 2000 experiences thermal runaway, causing the internal pressure of the housing to rise rapidly, the explosion-proof valve 600 can be used to vent the air, so as to ensure the working performance of the exhaust assembly 200 and the explosion-proof valve 600 to a certain extent.

[0137] In some embodiments, the mounting plate 100 is provided with a first assembly port (not shown in the figure), and the explosion-proof valve 600 is provided at the first assembly port, which can realize the explosion-proof valve 600 being placed on the mounting plate 100, thereby facilitating the use of the mounting plate 100 to support the explosion-proof valve 600, improving the positional stability of the explosion-proof valve 600, and reducing the difficulty of matching the explosion-proof valve 600 with the mounting plate 100.

[0138] In some embodiments, as shown in Figures 1 and 2, the battery safety assembly 1000 further includes a terminal post 700 disposed on the mounting plate 100. This allows the mounting plate 100 to support the terminal post 700, improving the positional stability of the terminal post 700 and thus ensuring its operational performance.

[0139] It should be noted that the pole piece 700 is mainly used for electrical connection with the tab of the electrode core, so as to draw out the current of the electrode core through the pole piece 700, and to a certain extent ensure the working performance of the electrode core.

[0140] In some embodiments, the mounting plate 100 is provided with a second assembly port (not shown in the figure), and the pole post 700 is disposed in the second assembly port, which can realize the pole post 700 being disposed on the mounting plate 100, thereby facilitating the use of the mounting plate 100 to support the pole post 700, improving the positional stability of the pole post 700, and reducing the difficulty of fitting the pole post 700 with the mounting plate 100.

[0141] The term "terminal 700" can refer to either a positive or negative terminal; no specific limitation is made here.

[0142] Of course, in some other embodiments, two pole posts 700 (not shown in this example figure) may also be provided on the mounting plate 100, with the two pole posts 700 forming a positive pole post and a negative pole post respectively.

[0143] The battery cell 2000 of this disclosure is described below with reference to the accompanying drawings.

[0144] As shown in Figure 5, a battery cell 2000 according to an embodiment of the present disclosure includes: a casing, an electrode core, and a battery safety component 1000.

[0145] The outer casing forms an open receiving cavity, within which the electrode core is housed. This allows the electrode core to be placed inside the outer casing, facilitating its protection, extending its service life, and enhancing its safety during use.

[0146] The battery safety component 1000 is the same as described above. The specific structure of the battery safety component 1000 will not be elaborated here. The mounting plate 100 is located at the opening. This allows the battery safety component 1000 to be positioned directly facing the interior of the casing. When at least one of the temperature, pressure, or gas component content within the casing exceeds a preset value, the venting component 200 can be switched to the conductive state to vent, thereby improving the safety of the battery cell 2000.

[0147] In summary, the battery cell 2000 of this embodiment, by employing the aforementioned battery safety component 1000, can ensure the working performance of the battery cell 2000 to a certain extent, and enable the battery cell 2000 to operate for a long time and ensure the safety of the battery cell 2000 in use.

[0148] It should be noted that the outer shell can be formed by stamping or welding, and the material of the outer shell can be aluminum or steel, etc.

[0149] The battery pack 3000 of this disclosure is described below with reference to the accompanying drawings.

[0150] As shown in Figure 5, a battery pack 3000 according to an embodiment of the present disclosure includes a plurality of battery cells 2000.

[0151] Among them, the battery cell 2000 is the aforementioned battery cell 2000, and the specific structure of the battery cell 2000 will not be described in detail here.

[0152] As can be seen from the above structure, the battery pack 3000 of this embodiment of the present disclosure, by adopting the aforementioned battery cell 2000, can extend the service life of the battery pack 3000 to a certain extent and improve the safety of the battery pack 3000, thereby ensuring the working performance of the battery pack 3000 to a certain extent.

[0153] In some embodiments, the battery pack 3000 includes a housing assembly, in which a plurality of battery cells 2000 are disposed to form the battery pack 3000. The housing assembly is mainly used to protect and support the plurality of battery cells 2000 to improve the positional stability of the battery cells 2000, ensure the working performance of the battery cells 2000, extend the service life of the battery cells 2000, and improve the safety of the battery cells 2000 in use, so as to further ensure the working performance of the battery pack 3000.

[0154] The electrical device 10000 of this disclosure is described below with reference to the accompanying drawings.

[0155] As shown in Figure 5, an electrical device 10000 according to an embodiment of the present disclosure includes a battery pack 3000.

[0156] Among them, battery pack 3000 is the aforementioned battery pack 3000, and the specific structure of battery pack 3000 will not be described in detail here.

[0157] As can be seen from the above structure, the power device 10000 of this embodiment, by adopting the aforementioned battery pack 3000, is beneficial to improving the working performance of the power device 10000 and ensuring the safety of the power device 10000 in use.

[0158] It should be noted that the electrical device 10000 mentioned here can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc.

[0159] Among them, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys; spacecraft can 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.

[0160] In some examples, the electrical device 10000 is configured as a vehicle such as a battery-powered vehicle or an electric vehicle, and the vehicle can be powered by the aforementioned battery pack 3000.

[0161] The following describes a control method for a battery cell 2000 according to an embodiment of the present disclosure.

[0162] Wherein, the battery cell 2000 is the aforementioned battery cell 2000, and the control method for the battery cell 2000 includes the following steps:

[0163] S1. Determine that the exhaust conditions are met;

[0164] S2, Control the exhaust valve 210 to switch to the on state;

[0165] S3. If the closing condition is met, control the exhaust valve 210 to switch to the off state.

[0166] In other words, the control method for the battery cell 2000 in this embodiment first determines whether the battery cell 2000 meets the venting conditions. When the venting conditions are met, the venting valve 210 is switched to the conducting state to allow venting through the venting valve 210, which to some extent prevents the battery cell 2000 from failing due to abnormal internal temperature, pressure, or active gas content. When the venting conditions are not met, i.e., the closing conditions are met, the venting valve 210 is switched to the closing state. At this time, the mounting plate 100 can be used to seal the receiving cavity to ensure the sealing of the battery cell 2000 and to some extent ensure the working performance of the battery cell 2000.

[0167] As can be seen from the above method, the control method of the battery cell 2000 in this embodiment of the present disclosure controls the vent valve 210 to switch between the on and off states by judging whether the battery cell 2000 meets the venting and closing conditions. While realizing the venting by venting the battery cell 210, it can also facilitate the sealing of the receiving cavity by the mounting plate 100, ensuring the sealing of the battery cell 2000, and to a certain extent ensuring the working performance of the battery cell 2000, thereby enabling the long-term operation of the battery cell 2000 and ensuring the safety of the battery cell 2000 in use.

[0168] In some embodiments, the venting conditions are met by satisfying at least one of the following: the temperature inside the casing is greater than or equal to a set temperature, the air pressure inside the casing is greater than or equal to a set air pressure, and the content of active gas inside the casing is greater than or equal to a set content. That is, when it is determined that the temperature inside the casing is greater than or equal to a set temperature, the air pressure inside the casing is greater than or equal to a set air pressure, and / or the content of active gas inside the casing is greater than or equal to a set content, the venting valve 210 is switched to the conducting state to enable venting through the venting valve 210, thereby preventing the battery cell 2000 from failing due to abnormal internal parameters to a certain extent.

[0169] The set temperature, set air pressure, and set content can be set according to the performance of the 2000 battery cells, and this disclosure does not impose specific limitations.

[0170] In some embodiments, the shut-off condition is that multiple conditions are met simultaneously: the temperature inside the casing is lower than a set temperature, the air pressure inside the casing is lower than a set air pressure, and the content of active gas inside the casing is lower than a set content. That is, when it is determined that the temperature inside the casing is lower than the set temperature, the air pressure inside the casing is lower than the set air pressure, and the content of active gas inside the casing is lower than the set content, the exhaust valve 210 is controlled to switch to the shut-off state. At this time, the mounting plate 100 can be used to seal the receiving cavity, ensuring the sealing of the battery cell 2000, and to a certain extent ensuring the working performance of the battery cell 2000, thereby achieving long-term operation of the battery cell 2000.

[0171] In some examples, during the operation of the battery cell 2000, the sensor 400 detects the internal temperature, internal air pressure, and active gas content of the casing. The sensor 400 transmits the detected data to the controller 300. When the controller 300 determines that the internal temperature, internal air pressure, and / or active gas content are greater than or equal to a set value, the controller 300 determines that the battery cell 2000 meets the venting conditions. At this time, the controller 300 controls the vent valve 210 to switch to the on state for venting. During the venting process, the sensor 400 performs real-time detection and transmits the detection data to the controller 300. When the controller 300 determines that the internal temperature, internal air pressure, and active gas content are less than a set value, the controller 300 determines that the battery cell 2000 meets the shut-off conditions. At this time, the controller 300 controls the vent valve 210 to switch to the off state to ensure the working performance of the battery cell 2000 and facilitate its long-term operation.

[0172] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0173] Figure 3 shows two first exhaust ports 211 and two second exhaust ports 212 for illustrative purposes. However, after reading the above technical solution, those skilled in the art will obviously understand that applying this solution to a technical solution with three, four or more first exhaust ports 211 and second exhaust ports 212 would also fall within the protection scope of this disclosure.

[0174] The specific structures of other components of the battery safety component 1000, battery cell 2000 and control method, battery pack 3000 and electrical device 10000 according to the embodiments of this disclosure, such as the explosion-proof valve 600, are known to those skilled in the art and will not be described in detail here.

[0175] In the description of this specification, references to terms such as "embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A battery safety component (1000), wherein, include: Mounting plate (100), the mounting plate (100) being adapted to connect to the housing of a battery cell (2000), the housing having a receiving cavity for accommodating the electrode core; An exhaust assembly (200) is disposed on the mounting plate (100) and includes an exhaust valve (210). The exhaust valve (210) has an exhaust passage and has an open state and a closed state. The exhaust valve (210) is switchable between the open state and the closed state. In the open state, the exhaust passage is open to connect the receiving cavity for exhaust. In the closed state, the exhaust passage is closed. A controller (300) is electrically connected to the exhaust valve (210) and is used to control the exhaust valve (210) to switch between the on state and the off state.

2. The battery safety assembly (1000) according to claim 1, wherein, The exhaust channel has a first exhaust port (211) and a second exhaust port (212), which are located on opposite sides of the mounting plate (100). The exhaust valve (210) can control the first exhaust port (211) and the second exhaust port (212) to connect or disconnect, so that the exhaust valve (210) can switch between the on state and the off state.

3. The battery safety assembly (1000) according to claim 2, wherein, The exhaust valve (210) includes a control valve, which is movably disposed within the exhaust channel and located between the first exhaust port (211) and the second exhaust port (212). The control valve is used to control the connection or disconnection of the first exhaust port (211) and the second exhaust port (212).

4. The battery safety assembly (1000) according to claim 2 or 3, wherein, The first vent (211) and / or the second vent (212) include a plurality of vents.

5. The battery safety assembly (1000) according to any one of claims 1-4, wherein, The exhaust channel is also equipped with a first waterproof and breathable component.

6. The battery safety assembly (1000) according to any one of claims 1-5, wherein, It also includes a sensor (400) electrically connected to the controller (300), the sensor (400) being used to detect at least one of temperature, air pressure and gas component content within the housing; The controller (300) is used to control the exhaust valve (210) based on the detection result of the sensor (400).

7. The battery safety assembly (1000) according to claim 6, wherein, The sensor (400) includes a temperature sensor (410), a pressure sensor (420), and a gas sensor (430). The temperature sensor (410) is used to detect the temperature inside the housing, the pressure sensor (420) is used to detect the pressure inside the housing, and the gas sensor (430) is used to detect the content of gas components inside the housing.

8. The battery safety assembly (1000) according to claim 6 or 7, wherein, The controller (300) includes a circuit board (310) and a control unit (320). The circuit board (310) is disposed on the mounting plate (100), and the control unit (320) is disposed on the circuit board (310) and electrically connected to the circuit board (310), the sensor (400), and the exhaust valve (210), respectively.

9. The battery safety assembly (1000) according to claim 8, wherein, The sensor (400) is located on the side of the circuit board (310) facing the receiving cavity.

10. The battery safety assembly (1000) according to claim 9, wherein, It also includes a first protective element (500), which is disposed on the side of the sensor (400) facing the receiving cavity.

11. The battery safety assembly (1000) according to claim 10, wherein, The first protective component (500) is the second waterproof and breathable component.

12. The battery safety assembly (1000) according to any one of claims 8-11, wherein, The mounting plate (100) is provided with a mounting groove (110), and the circuit board (310) is disposed in the mounting groove (110).

13. The battery safety assembly (1000) according to claim 12, wherein, The depth of the mounting groove (110) is greater than or equal to the thickness of the circuit board (310).

14. The battery safety assembly (1000) according to claim 12 or 13, wherein, It also includes a second protective member, which is disposed in the mounting groove (110) and located on the side of the circuit board (310) opposite to the receiving cavity.

15. The battery safety assembly (1000) according to claim 14, wherein, 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 element.

16. The battery safety assembly (1000) according to any one of claims 1-15, wherein, It also includes an explosion-proof valve (600) disposed on the mounting plate (100), the explosion-proof valve (600) being configured to break upon reaching a set pressure inside the housing to connect the receiving cavity.

17. A single battery cell (2000), wherein, include: A housing, wherein an opening is formed within the housing; The electrode core is disposed within the receiving cavity; A battery safety component (1000), wherein the battery safety component (1000) is the battery safety component (1000) according to any one of claims 1-16, and the mounting plate (100) is disposed at the opening.

18. A battery pack (3000), wherein, Includes multiple battery cells (2000) as described in claim 17.

19. An electrical appliance (10000), wherein, Includes the battery pack (3000) according to claim 18.

20. A control method for a single battery cell (2000), wherein, The battery cell (2000) is the battery cell (2000) according to claim 17, and the control method includes: The exhaust conditions are deemed met. Control the exhaust valve (210) to switch to the conducting state; If the closing condition is met, the exhaust valve (210) is switched to the cut-off state.

21. The control method for a single battery cell (2000) according to claim 20, wherein, The exhaust conditions must satisfy at least one of the following: The temperature inside the outer shell is greater than or equal to a set temperature, the air pressure inside the outer shell is greater than or equal to a set air pressure, and the content of active gas inside the outer shell is greater than or equal to a set content.

22. The control method for a single battery cell (2000) according to claim 20 or 21, wherein, The shutdown condition is that multiple of the following conditions are met simultaneously: The temperature inside the outer shell is lower than the set temperature, the air pressure inside the outer shell is lower than the set air pressure, and the content of active gas inside the outer shell is lower than the set content.

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