Switching element, battery pack and electric equipment

Abstract

The embodiment of the utility model provides a switch element, battery pack and electric equipment, the switch element comprises a first contact piece, a second contact piece, a driving mechanism and a shell, the shell is internally provided with an installation cavity, the first contact piece, the second contact piece and the driving mechanism are sequentially arranged in the installation cavity, the first contact piece is connected to the shell, and the second contact piece is connected to the shell. The driving mechanism is connected with the second contact piece, and the driving mechanism is used for driving the second contact piece to move, so that the switch element is switched between the first state and the second state; in the first state, the second contact is in contact with the first contact, and in the second state, the second contact is separated from the first contact.

Description

Technical Field

[0001] The utility model relates to the technical field of switch elements, and in particular to a switch element, a battery pack and an electrical device. Background Art

[0002] The switch element includes a first contact piece and a second contact piece, wherein the second contact piece is a movable component. The second contact piece can be driven to move so that the first contact piece and the second contact piece come into contact to achieve connection of the circuit, or the second contact piece can be driven to move so that the first contact piece and the second contact piece are separated to achieve disconnection of the circuit.

[0003] In the related art, in order to drive the second contact to move, a driving coil, a driving magnet, a push rod, a reset spring, etc. are usually provided in the switch element. When the second contact needs to be pushed to move so that it contacts the first contact, the driving coil can be energized, and the current flowing through the driving coil generates electromagnetic force, and the driving magnet drives the push rod to make the second contact and the first contact contact; after the coil is powered off, the push rod drives the second contact and the first contact to disconnect under the reaction force of the reset elastic member, and the circuit on-off control is realized through the frequent above-mentioned movement process. This type of switch element has many components, which leads to a larger size of the switch element. Utility Model Content

[0004] The embodiments of the utility model provide a switch element, a battery pack and an electrical device to solve the problem in the related art that the switch element has too many components, increases the size of the switch element and is not conducive to the miniaturization design of the switch element.

[0005] In order to solve the above technical problems, the utility model is achieved as follows:

[0006] In the first aspect, an embodiment of the utility model proposes a switch element, which includes a first contact piece, a second contact piece, a driving mechanism and a shell, wherein the shell has an installation cavity inside, and the first contact piece, the second contact piece and the driving mechanism are sequentially arranged in the installation cavity, the first contact piece is connected to the shell, the driving mechanism is connected to the second contact piece, and the driving mechanism is used to drive the second contact piece to move so that the switch element switches between a first state and a second state; in the first state, the second contact piece is in contact with the first contact piece, and in the second state, the second contact piece is separated from the first contact piece.

[0007] Optionally, the driving mechanism includes a driving member and a self-locking structure, and an output shaft of the driving member is connected to the second contact member to drive the second contact member to move;

[0008] The self-locking structure is connected to the output shaft of the driving member. When the switch element is in the first state or the second state, the self-locking structure locks the output shaft. When the switch element is switching between the first state and the second state, the self-locking structure releases the lock on the output shaft.

[0009] Optionally, the driving mechanism further includes a control unit, which is electrically connected to the driving member and the self-locking structure respectively, and is used to control power on or off of the driving member and the self-locking structure.

[0010] Optionally, the driving member is a linear motor.

[0011] Optionally, a wireless receiving end is provided in the driving component, and the wireless receiving end is electrically connected to the coil of the driving component, and the wireless receiving end is used to cooperate with an external wireless power supply device to provide electrical energy to the coil.

[0012] Optionally, the first contact piece has a contact head for contacting the second contact piece, and the switch element also includes a first magnetic piece and a second magnetic piece. The first magnetic piece and the second magnetic piece are both located in the mounting cavity, and the first magnetic piece and the second magnetic piece are arranged on both sides of the contact head along a moving direction perpendicular to the second contact piece.

[0013] Optionally, the first contact piece has a contact head for contacting the second contact piece, and the switch element further includes an arc extinguishing cover, which is located in the installation cavity and is sleeved on the outside of the first contact piece, and a part of the arc extinguishing cover is opposite to the contact head.

[0014] Optionally, a collection module is provided on the first contact member and / or the second contact member, and the collection module is used to collect the current or voltage between the second contact member and the first contact member.

[0015] In a second aspect, an embodiment of the utility model further proposes a battery pack, which includes the switch element and a battery module as described in any one of the first aspects, and the first contact member is electrically connected to the battery module.

[0016] In a third aspect, an embodiment of the utility model further proposes an electrical device, which includes the battery pack in the second aspect, or includes any switch element described in the first aspect.

[0017] In an embodiment of the utility model, the switch element includes a first contact, a second contact, a driving mechanism and a housing, and the housing has an installation cavity inside, and the first contact, the second contact and the driving mechanism can be arranged in the installation cavity in sequence. Among them, the first contact is connected to the housing, and the driving mechanism is connected to the second contact. Therefore, the second contact can be driven to move by the driving structure, so that the second contact can move along the distribution direction of the first contact and the second contact, so that it is close to the first contact or away from the first contact, so that the switch element can switch between the first state and the second state to achieve on and off. Specifically, in the first state, the second contact can contact the first contact, at this time the first contact and the second contact are connected, the switch element is in a closed state, and the circuit where the switch element is located can be turned on; in the second state, the second contact can be separated from the first contact, at this time the first contact and the second contact are disconnected, and the switch element is in an open state, and the circuit where the switch element is located can be disconnected.

[0018] In the embodiment of the utility model, the second contact piece is connected through the driving mechanism, and the intermediate transmission component between the driving mechanism and the second contact piece is eliminated, which can reduce the number of components in the switch element. On this basis, the volume of the switch element can also be smaller, which is conducive to the miniaturized design of the switch element. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram showing a switch element provided by an embodiment of the utility model;

[0020] Figure 2 A schematic diagram showing a driving member provided by an embodiment of the utility model;

[0021] Figure 3 A cross-sectional view of a switch element provided in an embodiment of the utility model is shown.

[0022] Reference numerals:

[0023] 100: switch element; 10: first contact piece; 20: driving mechanism; 30: housing; 31: mounting cavity; 21: driving piece; 22: output shaft; 40: second contact piece; 50: first magnetic piece; 60: second magnetic piece; 70: arc extinguishing cover. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] It should be understood that the references to "one embodiment" or "an embodiment" throughout the specification mean that the specific features, structures, or characteristics associated with the embodiment are included in at least one embodiment of the present invention. Therefore, the references to "in one embodiment" or "in an embodiment" appearing throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0026] like Figures 1 to 3 As shown, the switch element 100 includes a first contact piece 10, a second contact piece 40, a driving mechanism 20 and a housing 30. The housing 30 has an installation cavity 31 inside. The first contact piece 10, the second contact piece 40 and the driving mechanism 20 are sequentially arranged in the installation cavity 31. The first contact piece 10 is connected to the housing 30, the driving mechanism 20 is connected to the second contact piece 40, and the driving piece 21 is used to drive the second contact piece 40 to move so that the switch element 100 switches between the first state and the second state; in the first state, the second contact piece 40 contacts the first contact piece 10, and in the second state, the second contact piece 40 is separated from the first contact piece 10.

[0027] In the embodiment of the utility model, the switch element 100 includes a first contact 10, a second contact 40, a drive mechanism 20 and a housing 30. The housing 30 has an installation cavity 31 inside, and the first contact 10, the second contact 40 and the drive mechanism 20 can be sequentially arranged in the installation cavity 31. Among them, the first contact 10 is connected to the housing 30, and the drive mechanism 20 is connected to the second contact 40. Therefore, the second contact 40 can be driven to move by the drive structure, so that the second contact 40 can move along the distribution direction of the first contact 10 and the second contact 40, so that it is close to the first contact 10 or away from the first contact 10, so that the switch element 100 can switch between the first state and the second state to achieve on and off. Specifically, in the first state, the second contact piece 40 can contact the first contact piece 10. At this time, the first contact piece 10 and the second contact piece 40 are connected, and the switch element 100 is in a closed state, and the circuit where the switch element 100 is located can be turned on; in the second state, the second contact piece 40 can be separated from the first contact piece 10. At this time, the first contact piece 10 and the second contact piece 40 are disconnected. At this time, the switch element 100 is in an open state, and the circuit where the switch element 100 is located can be disconnected.

[0028] In the embodiment of the utility model, the second contact member 40 is connected via the driving mechanism 20, and the intermediate transmission component between the driving mechanism 20 and the second contact member 40 is eliminated, so that the number of components in the switch element 100 can be reduced. On this basis, the volume of the switch element 100 can also be smaller, which is conducive to the miniaturized design of the switch element 100.

[0029] In addition, in some embodiments, the driving mechanism 20 may include a driving member 21 and a self-locking structure, wherein the output shaft 22 of the driving member 21 is connected to the second contact member 40 for driving the second contact member 40 to move; the self-locking structure is connected to the output shaft 22 of the driving member 21, and when the switching element 100 is in the first state or the second state, the self-locking structure locks the output shaft 22; during the switching process between the first state and the second state of the switching element 100, the self-locking structure releases the lock on the output shaft 22.

[0030] The driving mechanism 20 includes a driving member 21, and the driving member 21 can be connected to the second contact member 40, so that the second contact member 40 can be driven to move by the driving member 21, so that the second contact member 40 can contact or separate with the first contact member 10. Specifically, the driving member 21 can have an output shaft 22, and when the driving member 21 is running, the output shaft 22 can move along the distribution direction of the first contact member 10 and the second contact member 40, so that the second contact member 40 can be moved toward the first contact member 10, or moved away from the first contact member 10, so that the switch element 100 can be switched between the first state and the second state.

[0031] The driving mechanism 20 also includes a self-locking structure. Since the self-locking structure is connected to the output shaft 22 of the driving member 21, the output shaft 22 of the driving member 21 can be locked or unlocked by the self-locking structure. Specifically, when the switch element 100 is in the first state or the second state, the self-locking structure can lock the output shaft 22. At this time, the output shaft 22 can be maintained at the current position so that the second contact member 40 is also maintained at the current position, so that the switch element 100 can be maintained in the first state or the second state, avoiding the driver 21 driving the second contact member 40 to continue to move, resulting in unstable closure of the switch element 100, or damage to the first contact member 10. In the process of switching between the first state and the second state of the switch element 100, the self-locking structure can unlock the output shaft 22. At this time, the output shaft 22 of the driving member 21 is in a movable state, and the driving member 21 can be operated to move the output shaft 22 to achieve the switching of the switch element 100 from the first state to the second state, or to achieve the switching of the switch element 100 from the second state to the first state.

[0032] In the related art, in order to drive the second contact member 40 to move, a driving coil, a driving magnet and corresponding mounting elements are usually provided in the switch element 100. When the second contact member 40 needs to be driven to move, the driving coil can be energized so that the driving coil pushes the driving magnet to move, so that the driving magnet drives the second contact member 40 to move. In this setting, after the driving magnet pushes the second contact member 40 to move to the position, the driving coil needs to be continuously energized so that the second contact member 40 remains in the current position, which consumes a lot of energy.

[0033] In the embodiment of the utility model, since the drive assembly includes a self-locking structure connected to the output shaft 22 of the drive member 21, the drive assembly has a self-locking function, and can be self-locked when the switch element 100 is in the first state or the second state, so that the second contact member 40 can remain in the current position. That is, after the drive member 21 drives the second contact member 40 to move to a position in contact with or disconnected from the first contact member 10, the self-locking structure can lock the output shaft 22, at which time the motor shaft remains stationary, the power supply to the drive member 21 can be disconnected, and the second contact member 40 remains in contact with or disconnected from the first contact member 10. Compared with the related art, after the second contact member 40 moves to the position, it is necessary to continuously energize the drive coil. The setting of the drive assembly in the present application can also reduce the operating energy consumption of the switch element 100. In addition, the continuous energization of the drive coil will also increase the temperature rise of the switch element 100. In the present application, the switch element 100 can be powered off after the state is switched, and the heat generation is low, which can reduce the overall temperature rise of the switch element 100, which is conducive to improving the life of the switch element 100.

[0034] It should be noted that the self-locking structure can be integrated inside the driver 21. For example, a brake device can be provided inside the driver 21, and the brake device can constitute a self-locking structure to achieve locking or unlocking of the output shaft 22. The self-locking structure is integrated inside the driver 21, which can further reduce the occupied space of the drive assembly and is conducive to the miniaturization design of the switch element 100. Of course, the self-locking structure can also be provided outside the driver 21 and connected to the output shaft 22 of the driver 21.

[0035] In addition, in some embodiments, the driving mechanism 20 may further include a control unit, which is electrically connected to the driving member 21 and the self-locking structure, respectively, and is used to control the driving member 21 and the self-locking structure to be powered on or off.

[0036] The driving mechanism 20 also includes a control unit, which is electrically connected to the driving member 21 and the self-locking structure, so that the control unit can control the driving member 21 and the self-locking structure to be powered on or off. The control unit can be set to achieve automatic control of the driving component, avoiding the need for manual power on and power off.

[0037] Specifically, when the switch element 100 is in the first state or the second state, the control unit can control the motor and the self-locking structure to be powered off, at which time the self-locking mechanism locks the output shaft 22, so that the second contact member 40 remains in the current position. When the switch element 100 needs to switch between the first state and the second state, the control unit can control the drive mechanism 20 to be powered on, at which time the drive member 21 and the self-locking structure both receive electrical signals, the self-locking mechanism can release the lock on the output shaft 22, the drive member 21 can operate so that the output shaft 22 drives the second contact member 40 to move, and after the second contact member 40 moves to the position, the control unit controls the self-locking structure to be powered off, so that the self-locking structure locks the output shaft 22, and then the control unit can control the drive member 21 to be powered off. After the drive member 21 is powered off, due to the locking of the self-locking structure, the output shaft 22 of the drive member 21 can remain stationary, so that the second contact member 40 remains in the current position.

[0038] In order to make the purpose, technical solution and beneficial effects of the embodiment of the utility model clearer, the working process of the driving mechanism 20 provided in the embodiment of the utility model is explained below to further describe the utility model: when the switch element 100 is in the second state and the control unit receives a closing signal, the self-locking structure and the driving member 21 are both powered, and the self-locking structure releases the lock of the driving member 21, and the driving member 21 moves and drives the second contact member 40 to move in the direction close to the first contact member 10. When the second contact member 40 moves to a position in contact with the first contact member 10, the control unit controls The self-locking structure is powered off to lock the locking drive member 21, and then the control unit can disconnect the power to the drive member 21; when the switch element 100 is in the first state and the drive component receives the disconnection signal, the self-locking structure and the drive member 21 are both powered, the self-locking structure releases the lock on the drive member 21, and the drive member 21 moves and drives the second contact member 40 to move away from the first contact member 10. When the second contact member 40 moves to a position disconnected from the first contact member 10, the control unit controls the self-locking structure to power off to lock the locking drive member 21, and then the control unit can disconnect the power to the drive member 21.

[0039] In the above description, the control unit first controls the self-locking structure to cut off the power to lock the locking drive member 21, and then cuts off the power to the drive member 21; in addition to the above method, the control unit can also cut off the power to the self-locking structure and the drive member 21 at the same time, that is, the self-locking structure locks the output shaft 22 and the drive member 21 cuts off the power.

[0040] The control unit may be an independently arranged control element, which is electrically connected to the drive element 21 and the self-locking structure, and may receive a control signal, and control the power on and off of the drive element 21 and the self-locking structure according to the control signal. The control signal may be an element that sends a control signal from the switch element 100. For example, when the switch element 100 is applied to a battery pack, the control unit may be a battery management system (BMS) in the battery pack; or, the BMS may be directly used as a control unit to control the power on and off of the drive element 21 and the self-locking structure.

[0041] It should be noted that, in order to facilitate the control of the self-locking structure to lock the driving member 21 when the second contact member 40 is in contact with or disconnected from the first contact member 10, the timing of locking the self-locking structure can be controlled in different ways. For example, the control unit can control the self-locking structure to lock according to the travel of the output shaft 22 of the driving member 21. For example, when the switching element 100 is in the second state, the distance between the first contact member 10 and the second contact member 40 is a preset distance. The control unit can control the self-locking structure to lock the driving member 21 after the output shaft 22 moves the preset distance; or, the control unit can also control the self-locking structure to lock the driving member 21 according to the running time of the driving member 21. For example, after the driving member 21 runs for a preset time, the switching element 100 can be switched from the first state to the second state. The control unit can control the self-locking structure to lock the driving member 21 after the driving motor runs for a preset time after the self-locking structure is unlocked.

[0042] In addition, in some embodiments, Figure 2 As shown, the driving member 21 may be a linear motor.

[0043] The driving member 21 is a linear motor, which can directly convert electrical energy into linear motion mechanical energy, and its output shaft 22 can move along a straight path. The moving path of the second contact member 40 is also a straight line, so the driving member 21 can be set as a linear motor, avoiding the use of the method of using electromagnetic effect to drive the second contact member 40 in the related art. On the one hand, the driving of the second contact member 40 can be simpler. On the other hand, compared with the method of setting a driving coil and a driving magnet in the related art, the linear motor used in this application can replace multiple components, thereby optimizing the product structure, reducing the number of components in the switch element 100, and reducing the volume of the switch element 100.

[0044] In the embodiment of the utility model, the linear motor can reduce the volume of the switch element 100, so that the switch element 100 can be applied to a smaller installation space. When the switch element 100 is applied to a battery pack, the housing can be made into a special-shaped structure to match the narrow space in the battery pack.

[0045] It should be noted that, in addition to the linear motor, the driving component 21 may also be of other types, such as a servo motor, a linear cylinder, etc. The specific type of the driving component 21 is not specifically limited in the embodiment of the utility model.

[0046] In addition, in some embodiments, a wireless receiving terminal may be provided in the driving member 21, and the wireless receiving terminal is electrically connected to the coil of the driving member 21, and the wireless receiving terminal is used to cooperate with an external wireless power supply device to provide electrical energy to the coil.

[0047] The driver 21 is provided with a wireless receiving terminal, which is electrically connected to the coil of the driver 21, and can cooperate with an external wireless power supply device through the wireless receiving terminal to provide electrical energy to the coil. Specifically, a wireless transmitting terminal can be provided in the wireless power supply device, and when the wireless power supply device is powered, the wireless transmitting terminal can transmit electrical energy to the wireless receiving terminal. Since the wireless receiving terminal is electrically connected to the coil of the driver 21, after the wireless receiving terminal receives the electrical energy, the wireless receiving terminal can supply power to the coil of the driver 21, thereby energizing the driver 21. After the self-locking structure is unlocked, the output shaft 22 of the driver 21 can move.

[0048] In the present application, a wireless receiving terminal is provided in the driving component 21, and the driving component 21 can be powered by the wireless receiving terminal, thereby avoiding the need to set up an additional power supply circuit for the driving component 21, and can simplify the structure of the switching element 100. When the switching element 100 is set in the battery pack, the internal structure of the battery pack can be further optimized, and the wiring harness cost can be saved.

[0049] In addition, in some embodiments, Figure 1 , Figure 3 As shown, the first contact member 10 has a contact head for contacting the second contact member 40, and the switch element 100 may also include a first magnetic member 50 and a second magnetic member 60. The first magnetic member 50 and the second magnetic member 60 are both located in the mounting cavity 31, and the first magnetic member 50 and the second magnetic member 60 are arranged on both sides of the contact head along a moving direction perpendicular to the second contact member 40.

[0050] The first contact member 10 has a contact head for contacting the second contact member 40. The switch element 100 also includes a first magnetic member 50 and a second magnetic member 60. The first magnetic member 50 and the second magnetic member 60 are both located in the mounting cavity 31. Since the first magnetic member 50 and the second magnetic member 60 are arranged on both sides of the contact head along a moving direction perpendicular to the second contact member 40, after the first contact member 10 and the second contact member 40 come into contact, the contact position of the two is located between the first magnetic member 50 and the second magnetic member 60. If the circuit in which the switch element 100 is located is energized, and the second contact member 40 is driven to move so that the second contact member 40 is separated from the first contact member 10, an arc will be generated between the first contact member 10 and the second contact member 40. Since the first magnetic member 50 and the second magnetic member 60 are arranged on both sides of the contact head perpendicular to the moving direction of the second contact member 40, the first magnetic member 50 and the second magnetic member 60 can generate a magnetic field, and the arc is subjected to force and moves under the action of the magnetic field, and the arc is quickly cooled, and the dielectric strength is quickly restored, so that the arc is extinguished. That is, in the present application, the switch element 100 is also provided with the first magnetic member 50 and the second magnetic member 60 that can extinguish the arc, so that the switch element 100 has a certain arc extinguishing ability and can be disconnected under load.

[0051] It should be noted that when the switch element 100 is a voltage-sharing relay, the switch element 100 does not need to be disconnected under load, and can be connected or disconnected when the circuit is not energized, that is, its connection and disconnection processes are not loaded, no current flows, and thus no arc is generated. At this time, the first magnetic component 50 and the second magnetic component 60 may not be provided in the switch element 100, which can reduce the number of components in the voltage-sharing relay and reduce the volume. When the switch element 100 is a traditional relay, the first magnetic component 50 and the second magnetic component 60 may be provided so that the switch element 100 has arc extinguishing capability. The first magnetic component 50 and the second magnetic component 60 may be provided according to the applicable scenario of the switch element 100, and the embodiment of the utility model is not specifically limited here.

[0052] It should also be noted that the first magnetic component 50 and the second magnetic component 60 can be ferrites, such as nickel-zinc ferrite, nickel-copper ferrite, nickel-magnesium ferrite, etc.; of course, they can also be magnetic components of other materials, such as neodymium iron boron magnets, neodymium magnets, etc. The specific materials of the first magnetic component 50 and the second magnetic component 60 are not specifically limited in the embodiments of the utility model.

[0053] In addition, when the first magnetic member 50 and the second magnetic member 60 are provided, the magnetism of the opposing surfaces of the first magnetic member 50 and the second magnetic member 60 can be opposite.

[0054] In addition, in some embodiments, the first contact member 10 has a contact head for contacting the second contact member 40, and the switch element 100 may further include an arc extinguishing cover 70, which is located in the installation cavity 31 and is sleeved on the outside of the first contact member 10, and a portion of the arc extinguishing cover 70 is opposite to the contact head, such as Figure 1 , Figure 3 shown.

[0055] The first contact piece 10 has a contact head for contacting the second contact piece 40. The switch element 100 also includes an arc extinguishing cover 70, which is also installed in the installation cavity 31. Since the arc extinguishing cover 70 is sleeved on the outside of the first contact piece 10 and part of the arc extinguishing cover 70 is opposite to the contact head, when an arc is generated between the first contact piece 10 and the second contact piece 40, the arc can contact the arc extinguishing cover 70, thereby reducing the arc problem and accelerating the arc extinction.

[0056] The arc extinguishing hood 70 may be provided with a plurality of slits, which may be divided into longitudinal slits and transverse slits according to the relative positional relationship between the axis of the slit and the axis of the arc. The arc extinguishing hood 70 may include a longitudinal slit arc extinguishing hood 70 and a transverse slit arc extinguishing hood 70. The arc may be elongated in the arc extinguishing slits, and the cooling is enhanced, and the arc may also be cooled when the arc contacts the arc extinguishing hood 70, so that the arc is extinguished. That is, in the present application, the switch element 100 is also provided with an arc extinguishing hood 70, so that the switch element 100 has a certain arc extinguishing capability and can also be disconnected under load.

[0057] Similarly, when the switch element 100 is a voltage-sharing relay, the arc-extinguishing cover 70 may not be provided in the switch element 100, so as to reduce the number of components in the voltage-sharing relay and reduce the volume. When the switch element 100 is a traditional relay, the arc-extinguishing cover 70 may be provided so that the switch element 100 has arc-extinguishing capability. The arc-extinguishing cover 70, the first magnetic member 50, and the second magnetic member 60 may be provided at the same time to improve the arc-extinguishing capability of the switch element 100.

[0058] In addition, in some embodiments, a collection module is disposed on the first contact member 10 and / or the second contact member 40 , and the collection module is used to collect the current or voltage between the second contact member 40 and the first contact member 10 .

[0059] A collection module is provided on the first contact member 10 and / or the second contact member 40, and the current or voltage between the second contact member 40 and the first contact member 10 can be collected by the collection module to know the working state of the circuit in which the switch element 100 is located or the working state of the switch element 100, thereby improving the reliability of the switch element 100.

[0060] It should be noted that when the acquisition module is used to collect current, the acquisition module can be a Hall sensor. Specifically, a Hall sensor can be mounted on the first contact 10 or the second contact 40. When the first contact 10 and the second contact 40 are in contact, the circuit is in a conducting state. At this time, the current between the second contact 40 and the first contact 10 can be collected by the Hall sensor. Since the switch element 100 is turned on, the current collected at this time is consistent with the current of the main circuit. When the acquisition module is used to collect voltage, two wires can be drawn from the static contact and connected to the acquisition module. When the first contact 10 and the second contact 40 are disconnected, the acquisition module can collect the voltage between the breakpoints. The voltage collected is the voltage at both ends of the power failure in the circuit.

[0061] In the embodiment of the utility model, the switch element 100 includes a first contact 10, a second contact 40, a drive mechanism 20 and a housing 30. The housing 30 has an installation cavity 31 inside, and the first contact 10, the second contact 40 and the drive mechanism 20 can be sequentially arranged in the installation cavity 31. Among them, the first contact 10 is connected to the housing 30, and the drive mechanism 20 is connected to the second contact 40. Therefore, the second contact 40 can be driven to move by the drive structure, so that the second contact 40 can move along the distribution direction of the first contact 10 and the second contact 40, so that it is close to the first contact 10 or away from the first contact 10, so that the switch element 100 can switch between the first state and the second state to achieve on and off. Specifically, in the first state, the second contact piece 40 can contact the first contact piece 10. At this time, the first contact piece 10 and the second contact piece 40 are connected, and the switch element 100 is in a closed state, and the circuit where the switch element 100 is located can be turned on; in the second state, the second contact piece 40 can be separated from the first contact piece 10. At this time, the first contact piece 10 and the second contact piece 40 are disconnected. At this time, the switch element 100 is in an open state, and the circuit where the switch element 100 is located can be disconnected.

[0062] In the embodiment of the utility model, the second contact member 40 is connected via the driving mechanism 20, and the intermediate transmission component between the driving mechanism 20 and the second contact member 40 is eliminated, so that the number of components in the switch element 100 can be reduced. On this basis, the volume of the switch element 100 can also be smaller, which is conducive to the miniaturized design of the switch element 100.

[0063] In addition, an embodiment of the utility model further provides a battery pack, which includes the switch element 100 and a battery module in any of the above embodiments, and the first contact member 10 is electrically connected to the battery module.

[0064] The battery pack includes the above-mentioned switch element 100 and a battery module. The first contact member 10 is electrically connected to the battery module, so that the switch element 100 can be connected in the battery pack to open and close the circuit connection where the battery module in the battery pack is located.

[0065] It should be noted that a plurality of battery modules may be provided in the battery pack, and the plurality of battery modules may be connected to a copper bus or an aluminum plate, so that the battery modules may be connected in series. The first contact member 10 may also be connected to a copper bus or an aluminum plate to electrically connect the switch element 100 to the battery module.

[0066] In the case where the switch element 100 is a voltage-dividing relay, the switch element 100 can be connected in series between multiple battery modules. The switch element 100 can divide the battery pack into two parts, providing a stable and reliable breakpoint between multiple battery modules. When the battery pack is open-circuited, a stable whole-pack voltage cannot be obtained between the total positive and total negative of the battery pack, thereby enhancing the insulation safety of the battery pack. At the same time, since the electrical connection between multiple battery modules is disconnected by the switch element 100, the heat conducted between the battery modules can be reduced when heat diffusion occurs in the battery module, thereby improving the safety of the battery module.

[0067] When the switch element 100 is a voltage-dividing relay, it does not require current breaking capability, and structures such as the first magnetic member 50, the second magnetic member 60, and the arc-extinguishing cover 70 can be omitted; and because a linear motor is used, structures such as the drive coil and the drive magnet can also be eliminated, thereby greatly reducing the volume while still ensuring the thrust required by the second contact member. Compared with a 300A relay, the volume can be reduced by more than 70%.

[0068] In addition, an embodiment of the utility model further provides an electrical device, which includes the above-mentioned battery pack, or includes the above-mentioned switch element 100.

[0069] The electrical device includes the above-mentioned battery pack. Since the volume of the switching element 100 is relatively small, the volume of the battery pack can be reduced. When the battery pack is used in the electrical device, the volume occupied by the battery pack in the electrical device can be reduced, which can facilitate the arrangement of other components in the electrical device.

[0070] The electrical device includes the above-mentioned switch element 100, and the on-off of the circuit in the electrical device can be controlled by the switch element 100, thereby reducing the volume occupied by the switch element 100 in the electrical device and facilitating the arrangement of other components in the electrical device.

[0071] Among them, the electrical equipment can be new energy vehicles, electric power-assisted vehicles, energy storage power stations, etc. The specific structure of the electrical equipment is not specifically limited in the embodiments of the present utility model.

[0072] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0073] Although the optional embodiments of the utility model embodiments have been described, those skilled in the art, once knowing the basic creative concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including optional embodiments and all changes and modifications falling within the scope of the utility model embodiments.

[0074] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity from another entity, and do not necessarily require or imply any such actual relationship or order between these entities. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that an article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such article or terminal device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the article or terminal device including the elements.

[0075] The technical solution provided by the present invention is introduced in detail above. Specific examples are used in this article to illustrate the principle and implementation method of the present invention. At the same time, for those skilled in the art, according to the principle and implementation method of the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A switching element, characterized in that: The switch element comprises a first contact piece, a second contact piece, a driving mechanism and a housing, wherein the housing has an installation cavity inside, wherein the first contact piece, the second contact piece and the driving mechanism are sequentially arranged in the installation cavity, wherein the first contact piece is connected to the housing, wherein the driving mechanism is connected to the second contact piece, and wherein the driving mechanism is used to drive the second contact piece to move so that the switch element switches between a first state and a second state; In the first state, the second contact is in contact with the first contact, and in the second state, the second contact is separated from the first contact.

2. The switching element according to claim 1, characterized in that The driving mechanism includes a driving member and a self-locking structure, wherein the output shaft of the driving member is connected to the second contact member to drive the second contact member to move; The self-locking structure is connected to the output shaft of the driving member. When the switch element is in the first state or the second state, the self-locking structure locks the output shaft. When the switch element is switching between the first state and the second state, the self-locking structure releases the lock on the output shaft.

3. The switching element according to claim 2, characterized in that The driving mechanism further comprises a control unit, which is electrically connected to the driving member and the self-locking structure respectively and is used for controlling the driving member and the self-locking structure to be powered on or off.

4. The switching element according to claim 2, characterized in that The driving member is a linear motor.

5. The switch element according to claim 2, characterized in that The driving component is provided with a wireless receiving end, the wireless receiving end is electrically connected to the coil of the driving component, and the wireless receiving end is used to cooperate with an external wireless power supply device to provide electrical energy to the coil.

6. The switching element according to claim 1, characterized in that The first contact piece has a contact head for contacting the second contact piece, and the switch element also includes a first magnetic piece and a second magnetic piece. The first magnetic piece and the second magnetic piece are both located in the installation cavity, and the first magnetic piece and the second magnetic piece are arranged on both sides of the contact head along a moving direction perpendicular to the second contact piece.

7. The switching element according to claim 1, characterized in that The first contact piece has a contact head for contacting the second contact piece. The switch element also includes an arc extinguishing cover, which is located in the installation cavity and sleeved on the outside of the first contact piece. A part of the arc extinguishing cover is opposite to the contact head.

8. The switch element according to claim 1, characterized in that A collection module is provided on the first contact piece and / or the second contact piece, and the collection module is used to collect the current or voltage between the second contact piece and the first contact piece.

9. A battery pack, characterized in that: The battery pack comprises the switch element according to any one of claims 1 to 8 and a battery module, and the first contact member is electrically connected to the battery module.

10. An electrical device, characterized in that: The electrical equipment comprises the battery pack according to claim 9, or comprises the switching element according to any one of claims 1-8.

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