Switching device, power distribution assembly, battery pack, electric equipment and control method thereof

Abstract

The invention discloses a switching device, a power distribution assembly, a battery pack, electric equipment and a control method thereof, the switching device comprises a plurality of static contacts, the plurality of static contacts comprise a first contact, a second contact, a third contact and a fourth contact, the first contact and the third contact are used for being connected with first power supply equipment, and the fourth contact is used for being connected with second power supply equipment; the second contact and the fourth contact are used for being connected with second power supply equipment; the first switching piece can move and is provided with a first position and a second position, at the first position, the first switching piece is connected with the first contact and the second contact and is connected with the third contact and the fourth contact, and the first power supply equipment and the second power supply equipment are connected in parallel; and at the second position, the first switching piece is connected with the second contact and the third contact, and the first power supply equipment and the second power supply equipment are connected in series. The switching device is simple in structure, high in integration level, low in cost, light in weight and small in occupied space.

Description

Technical Field

[0001] The present invention relates to the technical field of battery packs, and more particularly, to a switching device, a power distribution component, a battery pack, an electrical device, and a control method thereof. Background Art

[0002] To meet the requirements of fast charging and long endurance of battery packs, the voltage platform of battery packs has been gradually increased. However, due to different usage requirements, it is necessary to switch the battery pack between different voltage platforms. In the related art, the switching between series and parallel of a first power supply device and a second power supply device is achieved through three contactors. However, this method has the following defects:

[0003] 1. Using three contactors for series-parallel switching, the wiring and routing design is complex, resulting in high structural complexity.

[0004] 2. Three contactors need to be interconnected through a large number of copper plates (such as connecting copper bars and fixing copper bars). The large number of copper bars increases the weight and cost of the overall structure and affects heat dissipation. At the same time, the three contactors require a total of six high-voltage contacts and six low-voltage control interfaces, resulting in high space occupancy and high hardware requirements.

[0005] 3. To ensure the sequential operation of the three contactors, precise control logic needs to be implemented. The control logic is relatively complex, increasing the control difficulty and reducing the reliability. Summary of the Invention

[0006] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, an object of the present invention is to provide a switching device, which has a simple structure, high integration, low cost, light weight, and small space occupancy.

[0007] Another object of the present invention is to provide a power distribution component having the above switching device.

[0008] Still another object of the present invention is to provide a battery pack having the above power distribution component.

[0009] Yet another object of the present invention is to provide an electrical device having the above battery pack.

[0010] A further object of the present invention is to provide a control method for an electrical device having the above electrical device.

[0011] The switching device according to an embodiment of the present invention includes: a plurality of static contacts, the plurality of static contacts including a first contact, a second contact, a third contact, and a fourth contact, the first contact and the third contact being used for connecting to a first power supply device, and the second contact and the fourth contact being used for connecting to a second power supply device; a first switching member, the first switching member being movable and having a first position and a second position, in the first position, the first switching member connecting the first contact and the second contact and connecting the third contact and the fourth contact, the first power supply device and the second power supply device being in parallel; in the second position, the first switching member connecting the second contact and the third contact, the first power supply device and the second power supply device being in series.

[0012] The switching device according to an embodiment of the present invention, through the first contact and the third contact being used for connecting to a first power supply device, the second contact and the fourth contact being used for connecting to a second power supply device, in the first position, the first switching member connecting the first contact and the second contact and connecting the third contact and the fourth contact, the first power supply device and the second power supply device being in parallel; in the second position, the first switching member connecting the second contact and the third contact, the first power supply device and the second power supply device being in series, can realize the switching between series connection and parallel connection of the first power supply device and the second power supply device, avoiding the need for three contactors to achieve control in the related art, with a simple structure, capable of reducing costs, being beneficial to improving the integration degree, having a compact structure, saving space, and being convenient for reducing weight.

[0013] In addition, the switching device according to the above embodiment of the present invention may further have the following additional technical features:

[0014] The switching device according to some embodiments of the present invention, the first switching member includes: a first sub-switching member and a second sub-switching member, the first sub-switching member and the second sub-switching member being movable, in the first position, the first sub-switching member connecting the first contact and the second contact, and the second sub-switching member connecting the third contact and the fourth contact; in the second position, the first sub-switching member is connected to the second contact and spaced apart from the first contact, and the second sub-switching member is connected to the third contact and spaced apart from the fourth contact.

[0015] According to some embodiments of the present invention, in the second position, the first sub-switching member and the second sub-switching member are connected.

[0016] According to some embodiments of the present invention, the plurality of static contacts further include a fifth contact and a sixth contact. In the first position, the first switching member is spaced apart from the fifth contact and the sixth contact; in the second position, the first switching member is connected to the fifth contact and the sixth contact. The switching device further includes: a second switching member, the second switching member being movable and having a third position and a fourth position. In the third position, the second switching member is spaced apart from the fifth contact and the sixth contact; in the fourth position, the second switching member is connected to the fifth contact and the sixth contact.

[0017] According to some embodiments of the present invention, the first contact, the second contact, and the fifth contact are sequentially spaced apart in the moving direction of the first sub-switching member, and the fourth contact, the third contact, and the sixth contact are sequentially spaced apart in the moving direction of the second sub-switching member.

[0018] According to some embodiments of the present invention, the first sub-switching member includes: a first connecting portion, the first connecting portion extending along the arrangement direction of the first contact and the second contact and located on one side of the second contact; a first support arm and a second support arm, the first support arm and the second support arm being connected to two ends in the length direction of the first connecting portion, the first support arm being located between the first contact and the second contact and adapted to be connected to the first contact or the second contact, the second support arm being located between the second contact and the fifth contact and adapted to be connected to the second contact or the fifth contact, and / or, the second sub-switching member includes: a second connecting portion, the second connecting portion extending along the arrangement direction of the third contact and the fourth contact and located on one side of the third contact; a third support arm and a fourth support arm, the third support arm and the fourth support arm being connected to two ends in the length direction of the second connecting portion, the third support arm being located between the third contact and the fourth contact and adapted to be connected to the third contact or the fourth contact, the fourth support arm being located between the third contact and the sixth contact and adapted to be connected to the third contact or the sixth contact.

[0019] According to some embodiments of the present invention, the second switching member is located between the first sub-switching member and the second sub-switching member.

[0020] According to some embodiments of the present invention, the switching device further includes: a driving mechanism, the driving mechanism being configured to drive the first switching member to move between the first position and the second position and drive the second switching member to move between the third position and the fourth position.

[0021] According to some embodiments of the present invention, the driving mechanism includes: a first coil, a second coil, and a third coil. The first coil and the second coil respectively drive the first sub-switching member and the second sub-switching member to move between the first position and the second position, and the third coil drives the second switching member to move between the third position and the fourth position.

[0022] According to some embodiments of the present invention, the first coil and the second coil are electrically connected.

[0023] According to some embodiments of the present invention, the switching device further includes: an elastic member configured to drive at least one of the first sub-switching member, the second sub-switching member, and the second switching member to move in a direction close to the driving mechanism.

[0024] The power distribution component according to an embodiment of the present invention includes: a first power supply device and a second power supply device; the switching device according to an embodiment of the present invention, wherein the first contact and the third contact are connected to the first power supply device, and the second contact and the fourth contact are connected to the second power supply device. In the first position, the first switching member connects the first contact and the second contact and connects the third contact and the fourth contact, and the first power supply device and the second power supply device are connected in parallel; in the second position, the first switching member connects the second contact and the third contact, and the first power supply device and the second power supply device are connected in series.

[0025] For the power distribution component according to an embodiment of the present invention, the first contact and the third contact are used to connect to the first power supply device, and the second contact and the fourth contact are used to connect to the second power supply device. In the first position, the first switching member connects the first contact and the second contact and connects the third contact and the fourth contact, and the first power supply device and the second power supply device are connected in parallel; in the second position, the first switching member connects the second contact and the third contact, and the first power supply device and the second power supply device are connected in series, which can realize the switching between series connection and parallel connection of the first power supply device and the second power supply device, avoiding the need for three contactors for control in the related art, with a simple structure, which can reduce costs, is beneficial to improving the integration degree, has a compact structure, saves space, and is convenient for reducing weight.

[0026] The battery pack according to an embodiment of the present invention includes the power distribution component according to an embodiment of the present invention.

[0027] The battery pack according to an embodiment of the present invention is used to connect to a first power supply device through a first contact and a third contact, and to a second power supply device through a second contact and a fourth contact. In a first position, a first switching member connects the first contact and the second contact and connects the third contact and the fourth contact, and the first power supply device and the second power supply device are connected in parallel; in a second position, the first switching member connects the second contact and the third contact, and the first power supply device and the second power supply device are connected in series. It can realize the switching between series connection and parallel connection of the first power supply device and the second power supply device, avoiding the need for three contactors for control in the related art, with a simple structure, capable of reducing costs, being beneficial to improving the integration degree, having a compact structure, saving space, and being convenient for reducing weight.

[0028] The electrical equipment according to an embodiment of the present invention includes: the battery pack according to the embodiment of the present invention; an electrical component, one end of the electrical component is connected to the first contact and the other end is connected to the fourth contact.

[0029] The electrical equipment according to an embodiment of the present invention is used to connect to a first power supply device through a first contact and a third contact, and to a second power supply device through a second contact and a fourth contact. In a first position, a first switching member connects the first contact and the second contact and connects the third contact and the fourth contact, and the first power supply device and the second power supply device are connected in parallel; in a second position, the first switching member connects the second contact and the third contact, and the first power supply device and the second power supply device are connected in series. It can realize the switching between series connection and parallel connection of the first power supply device and the second power supply device, avoiding the need for three contactors for control in the related art, with a simple structure, capable of reducing costs, being beneficial to improving the integration degree, having a compact structure, saving space, and being convenient for reducing weight.

[0030] The control method of the electrical equipment according to an embodiment of the present invention, the electrical equipment is the electrical equipment according to the embodiment of the present invention, and the control method includes: obtaining the required voltage of the electrical component; according to the required voltage of the electrical component, controlling the first power supply device and the second power supply device to be connected in series or in parallel through the first switching member.

[0031] The control method of the electrical equipment according to an embodiment of the present invention is used to connect to a first power supply device through a first contact and a third contact, and to a second power supply device through a second contact and a fourth contact. In a first position, a first switching member connects the first contact and the second contact and connects the third contact and the fourth contact, and the first power supply device and the second power supply device are connected in parallel; in a second position, the first switching member connects the second contact and the third contact, and the first power supply device and the second power supply device are connected in series. It can realize the switching between series connection and parallel connection of the first power supply device and the second power supply device, avoiding the need for three contactors for control in the related art, with a simple structure, capable of reducing costs, being beneficial to improving the integration degree, having a compact structure, saving space, and being convenient for reducing weight.

[0032] According to some embodiments of the present invention, the switching device is the switching device according to the embodiments of the present invention, and the control method includes:

[0033] Determine that the first power supply device and the second power supply device are connected in series;

[0034] Control the first sub-switching member to be connected to the second contact and the fifth contact, the second sub-switching member to be connected to the third contact and the sixth contact, and the second switching member to be connected to the fifth contact and the sixth contact;

[0035] Determine that M1 is less than or equal to a first threshold value, where M1 is the potential difference between the third contact and the second contact;

[0036] Determine that the connection is normal when the first power supply device and the second power supply device are connected in series.

[0037] According to some embodiments of the present invention, the control method further includes:

[0038] Determine that the first power supply device and the second power supply device are connected in parallel;

[0039] Control the first sub-switching member to connect the first contact and the second contact, and the second sub-switching member to connect the third contact and the fourth contact;

[0040] Determine that M2 is less than or equal to a second threshold value and M3 is less than or equal to a third threshold value, where M2 is the potential difference between the first contact and the second contact, and M3 is the potential difference between the third contact and the fourth contact;

[0041] Control the second switching member to be spaced apart from the fifth contact and the sixth contact;

[0042] Determine that M1 is greater than or equal to a fourth threshold value;

[0043] Determine that the connection is normal when the first power supply device and the second power supply device are connected in parallel.

[0044] According to some embodiments of the present invention, the control method further includes:

[0045] Obtain the power-off signal of the power-consuming component;

[0046] Control the second switching member to be spaced apart from the fifth contact and the sixth contact;

[0047] Determine that M1 is greater than or equal to a fourth threshold value;

[0048] Determine that the power-off of the power-consuming component is normal.

[0049] According to some embodiments of the present invention, the switching device is the switching device according to the embodiments of the present invention, and the control method includes:

[0050] Determine that the first power supply device and the second power supply device are connected in parallel;

[0051] Control the first sub-switching member to connect the first contact and the second contact, the second sub-switching member to connect the third contact and the fourth contact, and the second switching member to be spaced apart from the fifth contact and the sixth contact;

[0052] Determine that M2 is less than or equal to a second threshold and M3 is less than or equal to a third threshold, where M2 is the potential difference between the first contact and the second contact, and M3 is the potential difference between the third contact and the fourth contact;

[0053] Determine that the connection is normal when the first power supply device and the second power supply device are connected in parallel.

[0054] According to some embodiments of the present invention, the control method further includes:

[0055] Determine that the first power supply device and the second power supply device are connected in series;

[0056] Control the second switching member to connect with the fifth contact and the sixth contact;

[0057] Determine that M1 is less than or equal to a first threshold, where M1 is the potential difference between the third contact and the second contact;

[0058] Control the first sub-switching member to connect with the second contact and the fifth contact, and the second sub-switching member to connect with the third contact and the sixth contact;

[0059] Determine that M2 is greater than or equal to a fifth threshold and M3 is greater than or equal to a sixth threshold;

[0060] Determine that the connection is normal when the first power supply device and the second power supply device are connected in series.

[0061] According to some embodiments of the present invention, the control method of the electrical equipment further includes:

[0062] Obtain the power-off signal of the electrical component;

[0063] Control the first sub-switching member to connect with the second contact and the fifth contact, and the second sub-switching member to connect with the third contact and the sixth contact;

[0064] Determine that M2 is greater than or equal to the fifth threshold and M3 is greater than or equal to the sixth threshold;

[0065] Determine that the power-off of the electrical component is normal.

[0066] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the following description of embodiments in conjunction with the accompanying drawings, in which:

[0068] Figure 1 is a schematic structural diagram of a switching device according to an embodiment of the present invention, wherein the first coil, the second coil, and the third coil are in an unpowered state;

[0069] Figure 2 is a schematic structural diagram of a switching device according to an embodiment of the present invention, wherein the first coil and the second coil are in a powered state and the third coil is in an unpowered state;

[0070] Figure 3 is a schematic structural diagram of a switching device according to an embodiment of the present invention, wherein the first coil and the second coil are in an unpowered state and the third coil is in a powered state;

[0071] Figure 4 is a front view of a switching device according to an embodiment of the present invention;

[0072] Figure 5 is a left view of a switching device according to an embodiment of the present invention;

[0073] Figure 6 is a rear view of a switching device according to an embodiment of the present invention (wherein the first housing is not shown);

[0074] Figure 7 is a top view of a switching device according to an embodiment of the present invention (wherein the first housing is not shown);

[0075] Figure 8 is a left view of a switching device according to an embodiment of the present invention (wherein the first housing is not shown);

[0076] Figure 9 is a circuit diagram of a switching device according to an embodiment of the present invention in a disconnected state;

[0077] Figure 10 is a circuit diagram of a switching device according to an embodiment of the present invention in a parallel state;

[0078] Figure 11It is a circuit diagram of the switching device in a series state according to an embodiment of the present invention;

[0079] Figure 12 It is a flowchart of a control method for an electrical device according to an embodiment of the present invention.

[0080] Reference numerals:

[0081] 100, switching device; 200, first power supply device; 300, second power supply device; 400, electrical component;

[0082] 10, stationary contact; 11, first contact; 12, second contact; 13, third contact; 14, fourth contact; 15, fifth contact; 16, sixth contact;

[0083] 20, first switching member; 21, first sub-switching member; 22, second sub-switching member; 211, first connecting portion; 212, first support arm; 213, second support arm; 214, first push rod; 221, second connecting portion; 222, third support arm; 223, fourth support arm; 224, second push rod;

[0084] 30, second switching member; 31, third push rod;

[0085] 40, drive mechanism; 41, first coil; 42, second coil; 43, third coil;

[0086] 50, elastic member;

[0087] 61, first housing; 62, second housing; 621, first interface; 622, second interface. Detailed implementation manners

[0088] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where 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 only for explaining the present invention and should not be construed as limiting the present invention.

[0089] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

[0090] In the description of the present invention, the "first feature" and the "second feature" may include one or more of such features. The meaning of "a plurality" is two or more. That the first feature is "above" or "below" the second feature may include the direct contact of the first and second features, or may include that the first and second features are not in direct contact but in contact through additional features therebetween. That the first feature is "above", "over" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature.

[0091] The switching device 100 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0092] Referring to Figures 1 - 8 As shown, the switching device 100 according to an embodiment of the present invention may include: a plurality of static contacts 10.

[0093] Specifically, the plurality of static contacts 10 include a first contact 11, a second contact 12, a third contact 13 and a fourth contact 14. The first contact 11 and the third contact 13 can be connected to the first power supply device 200, and the second contact 12 and the fourth contact 14 can be connected to the second power supply device 300, so as to meet the connection requirements of the first power supply device 200 and the second power supply device 300 with the switching device 100.

[0094] To meet the requirements of fast charging and long endurance of the battery pack, the voltage platform of the battery pack is gradually increased. However, due to different usage requirements, the battery pack needs to be switched between different voltage platforms. In the related art, the switching between the series and parallel connections of the first power supply device and the second power supply device is realized through three contactors. For example, both the first power supply device and the second power supply device are 400V battery modules. Through the switching between the series and parallel connections of the first power supply device and the second power supply device, the working requirements of the 400V platform and the 800V platform of the battery pack can be realized. However, this method has the following defects:

[0095] 1. Using three contactors for series and parallel switching, the wiring and cabling design are complex, resulting in a high structural complexity.

[0096] 2. The three contactors need to be interconnected through a large number of copper plates (such as connecting copper bars and fixing copper bars). The large number of copper bars increases the weight and cost of the overall structure and affects heat dissipation. At the same time, the three contactors altogether require six high-voltage contacts and six low-voltage control interfaces, occupying a high space and having high requirements for hardware.

[0097] 3. To ensure the sequential operation of the three contactors, precise control logic needs to be implemented. The control logic is relatively complex, increasing the control difficulty and reducing the reliability.

[0098] Therefore, in the present invention, as Figures 1 - 3 , Figures 6 - 8 shown, the switching device 100 further includes a first switching member 20. The first switching member 20 is movable and has a first position and a second position. In the first position, the first switching member 20 connects the first contact 11 and the second contact 12 and connects the third contact 13 and the fourth contact 14. The first power supply device 200 and the second power supply device 300 are connected in parallel, which can increase the power while ensuring the voltage of the battery pack remains unchanged, meeting the required usage requirements; in the second position, the first switching member 20 connects the second contact 12 and the third contact 13. The first power supply device 200 and the second power supply device 300 are connected in series, which can increase the voltage of the battery pack, making the flowing current small and the heat generation low, meeting the required usage requirements.

[0099] Through the switching device 100 of the present invention, the series and parallel switching of the first power supply device 200 and the second power supply device 300 can be achieved, and it is avoided that three contactors are required for control in the related art. The use of contactors and the copper bar connections between contactors, copper bar fixing structural parts, components, mounting brackets, and control modules and other structures are reduced. Thus, the material and maintenance costs can be reduced. At the same time, the number of wirings and detection points is reduced, the complexity can be lowered, the circuit design and installation are simplified, which is beneficial to improving the integration degree, the structure is compact, and space is saved. At the same time, since the contactors in the related art are reduced, the structures such as coils, contacts, housings, and heat dissipation components included in the contactors can be reduced, the use of materials is reduced, and it is convenient to reduce the weight of the battery pack. Therefore, the switching device 100 of the present invention has a higher integration degree, lower cost, lighter weight, and higher energy density.

[0100] In some embodiments, both the first power supply device 200 and the second power supply device 300 are 400V battery modules. When the first power supply device 200 and the second power supply device 300 are connected in series, the working requirements of the 800V platform of the battery pack are realized, the charging speed can be increased, a higher voltage platform can reduce the charging current, reduce the heat loss during charging, contribute to improving the charging efficiency, and support higher power output, such as improving the acceleration performance and power response of the vehicle; when the first power supply device 200 and the second power supply device 300 are connected in parallel, the working requirements of the 400V platform of the battery pack are realized, which can meet the charging requirements of a 400V charging pile and can also meet the usage requirements of other structures at 400V, such as meeting the power consumption requirements of electric vehicle subsystems, electronic devices, or accessories, etc.

[0101] The switching device 100 according to an embodiment of the present invention is used to connect to a first power supply device 200 through a first contact 11 and a third contact 13, and to a second power supply device 300 through a second contact 12 and a fourth contact 14. In the first position, the first switching member 20 connects the first contact 11 and the second contact 12 and connects the third contact 13 and the fourth contact 14, and the first power supply device 200 and the second power supply device 300 are connected in parallel; in the second position, the first switching member 20 connects the second contact 12 and the third contact 13, and the first power supply device 200 and the second power supply device 300 are connected in series, which can realize the switching between the series connection and the parallel connection of the first power supply device 200 and the second power supply device 300, avoiding the need for three contactors to achieve control in the related art, with a simple structure, which can reduce costs, is beneficial to improving the integration degree, has a compact structure, saves space, and is convenient for reducing weight.

[0102] In some embodiments of the present invention, as Figures 1 - 3 , Figures 6 - 8 shown, the first switching member 20 includes a first sub-switching member 21 and a second sub-switching member 22, and the first sub-switching member 21 and the second sub-switching member 22 are movable. In the first position, the first sub-switching member 21 connects the first contact 11 and the second contact 12, and the second sub-switching member 22 connects the third contact 13 and the fourth contact 14, which can realize the required connection requirements, so that the first power supply device 200 and the second power supply device 300 are connected in parallel; in the second position, the first sub-switching member 21 is connected to the second contact 12, and the first sub-switching member 21 is spaced apart from the first contact 11, and the second sub-switching member 22 is connected to the third contact 13, and the second sub-switching member 22 is spaced apart from the fourth contact 14, which can realize the required connection requirements, so that the first power supply device 200 and the second power supply device 300 are connected in series. Thus, by controlling the first sub-switching member 21 and the second sub-switching member 22, the required connection requirements can be realized, making the connection switching between the first power supply device 200 and the second power supply device 300 more flexible.

[0103] According to some embodiments of the present invention, in the second position, the first sub-switching member 21 and the second sub-switching member 22 are connected, which is convenient for realizing the series connection of the first power supply device 200 and the second power supply device 300, with convenient connection, simple structure, convenient for processing and manufacturing, and beneficial to reducing production costs.

[0104] In some embodiments of the present invention, as Figures 1 - 3 , Figure 6 and Figure 7 shown, the plurality of static contacts 10 further include a fifth contact 15 and a sixth contact 16. In the first position, the first switching member 20 is spaced apart from the fifth contact 15 and the sixth contact 16; in the second position, the first switching member 20 is connected to the fifth contact 15 and the sixth contact 16, which can realize the connection control requirements for the first switching member 20.

[0105] In addition, as Figures 1 - 3 , Figure 6 and Figure 7 shown, the switching device 100 further includes a second switching member 30. The second switching member 30 is movable, and the second switching member 30 has a third position and a fourth position. In the third position, the second switching member 30 is spaced apart from the fifth contact 15 and the sixth contact 16; in the fourth position, the second switching member 30 is connected to the fifth contact 15 and the sixth contact 16, which can meet the connection requirements of the second switching member 30, making the connection more flexible and variable. Moreover, when the first switching member 20 is in the second position and the second switching member 30 is in the fourth position, it is convenient to connect the first power supply device 200 and the second power supply device 300 in series, making the control simpler and more convenient.

[0106] According to some embodiments of the present invention, as Figures 1 - 3 , Figure 6 shown, the first contact 11, the second contact 12, and the fifth contact 15 are sequentially spaced apart in the moving direction of the first sub-switching member 21 (such as the up-and-down direction shown in Figure 6 ), so that the first sub-switching member 21 can be sequentially connected to or disconnected from the first contact 11, the second contact 12, and the fifth contact 15 during the movement process, improving the accuracy and stability of the switching, and making the control more convenient. The fourth contact 14, the third contact 13, and the sixth contact 16 are sequentially spaced apart in the moving direction of the second sub-switching member 22 (such as the up-and-down direction shown in Figure 6 ), so that the second sub-switching member 22 can be sequentially connected to or disconnected from the fourth contact 14, the third contact 13, and the sixth contact 16 during the movement process, improving the accuracy and stability of the switching, and making the control more convenient.

[0107] It should be noted that for the convenience of description, the orientations such as "up-and-down direction" in the present invention are based on the orientation relationship shown in the drawings, rather than the limitation of the orientation in the actual application process.

[0108] In some embodiments, as Figure 6 shown, the first sub-switching member 21 includes a first connecting portion 211, a first support arm 212, and a second support arm 213. The first connecting portion 211 extends along the arrangement direction of the first contact 11 and the second contact 12 (such as the left-and-right direction shown in Figure 6 ), and the first connecting portion 211 is located on one side of the second contact 12. The first support arm 212 and the second support arm 213 are connected to both ends of the first connecting portion 211 in the length direction, so that the first sub-switching member 21 is generally formed into a "U" - shaped structure, ensuring the structural strength of the first sub-switching member 21. Moreover, the structure of the first sub-switching member 21 is simple, which is convenient for processing and manufacturing, and can reduce the production cost.

[0109] In addition, as Figure 6As shown, the first support arm 212 is located between the first contact 11 and the second contact 12. The first support arm 212 can be connected to the first contact 11 or the second contact 12, facilitating the connection between the first support arm 212 and the first contact 11 or the second contact 12 to meet the required connection needs. The second support arm 213 is located between the second contact 12 and the fifth contact 15, and the second support arm 213 can be connected to the second contact 12 or the fifth contact 15, facilitating the connection between the second support arm 213 and the second contact 12 or the fifth contact 15 to meet the required connection needs, and can ensure that the first sub-switching member 21 is stably connected to the first contact 11, the second contact 12 or the fifth contact 15 to ensure reliable connection.

[0110] In some embodiments, as Figure 6 shown, the second sub-switching member 22 includes a second connecting portion 221, a third support arm 222 and a fourth support arm 223. The second connecting portion 221 extends along the arrangement direction of the third contact 13 and the fourth contact 14 (for example Figure 6 the left-right direction shown in

[0111] ), and the second connecting portion 221 is located on one side of the third contact 13. The third support arm 222 and the fourth support arm 223 are connected to the two ends of the second connecting portion 221 in the length direction, so that the second sub-switching member 22 is generally formed into a "U" - shaped structure, ensuring the structural strength of the second sub-switching member 22, and the structure of the second sub-switching member 22 is simple, facilitating processing and manufacturing, and can reduce production costs. Figure 6 In addition, as

[0112] shown, the third support arm 222 is located between the third contact 13 and the fourth contact 14, and the third support arm 222 can be connected to the third contact 13 or the fourth contact 14, facilitating the connection between the third support arm 222 and the third contact 13 or the fourth contact 14 to meet the required connection needs. The fourth support arm 223 is located between the third contact 13 and the sixth contact 16, and the fourth support arm 223 can be connected to the third contact 13 or the sixth contact 16, facilitating the connection between the fourth support arm 223 and the third contact 13 or the sixth contact 16 to meet the required connection needs, and can ensure that the second sub-switching member 22 is stably connected to the fourth contact 14, the third contact 13 or the sixth contact 16 to ensure reliable connection.

[0112] In some embodiments, as Figure 1As shown, the distance between the contact point of the first contact 11 and the first support arm 212 and the contact point of the second contact 12 and the first support arm 212 is d1, the distance between the contact point of the second contact 12 and the second support arm 213 and the contact point of the fifth contact 15 and the second support arm 213 is d2, the distance between the contact point of the fourth contact 14 and the third support arm 222 and the contact point of the third contact 13 and the third support arm 222 is d3, the distance between the contact point of the third contact 13 and the fourth support arm 223 and the contact point of the sixth contact 16 and the fourth support arm 223 is d4, and d1, d2, d3, and d4 satisfy: d1 = d2, d3 = d4. Thus, it is convenient to enable the first sub-switching member 21 to be connected to or disconnected from the first contact 11, the second contact 12, and the fifth contact 15 in sequence during movement, and enable the second sub-switching member 22 to be connected to or disconnected from the fourth contact 14, the third contact 13, and the sixth contact 16 in sequence during movement, ensuring reliable connection and improving the accuracy and stability of switching.

[0113] In addition, as Figure 1 shown, the fifth contact 15 and the sixth contact 16 are in the same plane and are spaced apart. The distance between the fifth contact 15 and the sixth contact 16 is d7, the length of the relative part of the fifth contact 15 and a part of the second switching member 30 is d5, the length of the relative part of the sixth contact 16 and a part of the second switching member 30 is d6, the length of the second switching member 30 is d8, and d5, d6, d7, and d8 satisfy: d8 = d5 + d6 + d7. Thus, it can ensure reliable contact between the second switching member 30 and the fifth contact 15 and the sixth contact 16, which is beneficial to improving the accuracy and stability of switching.

[0114] As Figure 1 shown, the first sub-switching member 21 is connected to the second contact 12 and is spaced apart from the first contact 11, the second sub-switching member 22 is connected to the third contact 13 and is spaced apart from the fourth contact 14, and the second switching member 30 is spaced apart from the fifth contact 15 and the sixth contact 16, which can disconnect the first power supply device 200 and the second power supply device 300, that is, the switching device 100 is in the off state, and the loop circuit is as Figure 9 shown, S1, S2, and S3 are off.

[0115] As Figure 2 shown, the first sub-switching member 21 rises by a distance of d1, the second sub-switching member 22 rises by a distance of d3, the first sub-switching member 21 connects the first contact 11 and the second contact 12, the second sub-switching member 22 connects the third contact 13 and the fourth contact 14, and the second switching member 30 is spaced apart from the fifth contact 15 and the sixth contact 16, which can make the first power supply device 200 and the second power supply device 300 in parallel, that is, the switching device 100 is in the parallel state, and the loop circuit is as Figure 10As shown, S2 is disconnected, and S1 and S3 are engaged.

[0116] As Figure 3 shown, along the arrangement direction of the first contact 11 and the second contact 12, the distances between the fifth contact 15 and the sixth contact 16 and the second switching member 30 are d9. When the second switching member 30 rises by a distance of d9, the first sub-switching member 21 is connected to the second contact 12 and spaced apart from the first contact 11, the second sub-switching member 22 is connected to the third contact 13 and spaced apart from the fourth contact 14, and the second switching member 30 is connected to the fifth contact 15 and the sixth contact 16, enabling the first power supply device 200 and the second power supply device 300 to be connected in series, that is, the switching device 100 is in a series state. The loop circuit is as Figure 11 shown, S2 is engaged, and S1 and S3 are disconnected.

[0117] In some embodiments of the present invention, as Figures 1 - 3 , Figure 6 and Figure 7 shown, the second switching member 30 is located between the first sub-switching member 21 and the second sub-switching member 22, which can make the structure of the switching device 100 compact, facilitate reducing the occupied space, and make it more convenient to place the switching device 100.

[0118] According to some embodiments of the present invention, as Figures 1 - 3 shown, the switching device 100 further includes a driving mechanism 40. The driving mechanism 40 can drive the first switching member 20 to move between a first position and a second position, and the driving mechanism 40 can drive the second switching member 30 to move between a third position and a fourth position, which can realize the automatic control of the switching device 100, make the switching more convenient, and is beneficial to improving the convenience and efficiency of operation.

[0119] In some embodiments of the present invention, as Figures 1 - 3 shown, the driving mechanism 40 includes a first coil 41, a second coil 42, and a third coil 43. The first coil 41 and the second coil 42 respectively drive the first sub-switching member 21 and the second sub-switching member 22 to move between a first position and a second position, and the third coil 43 drives the second switching member 30 to move between a third position and a fourth position, which can meet the position adjustment requirements of the first sub-switching member 21, the second sub-switching member 22, and the second switching member 30. And by generating a magnetic field after the first coil 41, the second coil 42, and the third coil 43 are energized, the control of the first switching member 20 and the second switching member 30 is realized. The structure is simple, the accurate control of the first switching member 20 and the second switching member 30 can be achieved, the accuracy and reliability of the switching are improved, and the production cost can be reduced at the same time.

[0120] According to some embodiments of the present invention, as Figures 1 - 3As shown, the first coil 41 and the second coil 42 are electrically connected, so that the same current flows through the first coil 41 and the second coil 42, and the first sub-switching element 21 and the second sub-switching element 22 can be simultaneously controlled to move in the same direction, which is convenient for simplifying the circuit structure, improving the switching efficiency, and reducing the use of the structure and reducing the cost. For example, the first coil 41 and the second coil 42 can be connected in series or in parallel, and the first coil 41 and the second coil 42 can be simultaneously controlled by the same low-voltage current.

[0121] In some embodiments, Figures 4 - 8 As shown, the switching device 100 includes a first shell 61 and a second shell 62, and the first shell 61 and the second shell 62 cover each other. The first switching member 20, the second switching member 30 and the driving mechanism 40 are all located between the first shell 61 and the second shell 62. The first shell 61 and the second shell 62 can protect the first switching member 20, the second switching member 30 and the driving mechanism 40 to avoid damage caused by exposure, which is beneficial to prolonging the service life.

[0122] In addition, if Figures 4 - 8 As shown, the switching device 100 also includes four high-voltage contact terminals, which are inserted into the first housing 61. The four high-voltage contact terminals are respectively formed into a first contact 11, a second contact 12, a third contact 13 and a fourth contact 14, so that the first contact 11 and the third contact 13 are connected to the first power supply device 200, and the second contact 12 and the fourth contact 14 are connected to the second power supply device 300, so that the switching device 100 is conveniently connected to the first power supply device 200 and the second power supply device 300, which is conducive to improving assembly efficiency. For example, the four high-voltage contact terminals are connected to the first housing 61 by brazing to ensure that the four high-voltage contact terminals are reliably fixed on the first housing 61, and the first housing 61 is a ceramic component, which can meet the insulation requirements of the first housing 61.

[0123] At the same time, if Figure 4 and Figure 7 As shown, the second shell 62 is provided with a first interface 621 and a second interface 622, and the first interface 621 and the second interface 622 are arranged at intervals. The first interface 621 can be used to power the first coil 41 and the second coil 42, and the second interface 622 can be used to power the third coil 43, thereby realizing the power supply requirements for the first coil 41, the second coil 42 and the third coil 43, and facilitating the external low-voltage power supply requirements for the first coil 41, the second coil 42 and the third coil 43.

[0124] In some embodiments of the present invention, Figures 1 - 3 As shown, the switching device 100 further includes an elastic member 50, which can drive at least one of the first sub-switching member 21, the second sub-switching member 22 and the second switching member 30 toward a direction close to the driving mechanism 40 (for example,Figure 6 When moving downward as shown, the elastic member 50 can reset the positions of at least one of the first sub-switching member 21, the second sub-switching member 22, and the second switching member 30, meeting the required position adjustment requirements, making the reset more convenient, and having a simple structure, which is convenient for reducing production costs. For example, the elastic member 50 can be a spring or the like.

[0125] In some embodiments where the first sub-switching member 21 includes a first connecting portion 211, a first support arm 212, and a second support arm 213, and the second sub-switching member 22 includes a second connecting portion 221, a third support arm 222, and a fourth support arm 223, as Figures 1 - 3 、 Figures 6 - 8 shown, the first sub-switching member 21 further includes a first push rod 214, the first push rod 214 is connected to the second support arm 213, an elastic member 50 is sleeved on the first push rod 214, the second sub-switching member 22 further includes a second push rod 224, the second push rod 224 is connected to the third support arm 222, an elastic member 50 is sleeved on the second push rod 224, and the second switching member 30 is provided with a third push rod 31, and an elastic member 50 is sleeved on the third push rod 31.

[0126] When the switching device 100 is in the off state, the elastic member 50 on the first push rod 214 enables the first sub-switching member 21 to be connected to the second contact 12 and spaced apart from the first contact 11. The elastic member 50 on the second push rod 224 enables the second sub-switching member 22 to be connected to the third contact 13 and spaced apart from the fourth contact 14. The elastic member 50 on the third push rod 31 enables the second switching member 30 to be spaced apart from the fifth contact 15 and the sixth contact 16. When the switching device 100 is in the parallel state, the first coil 41 and the second coil 42 are powered, causing the first coil 41 and the second coil 42 to respectively push the first push rod 214 and the second push rod 224 to move, thereby pushing the first sub-switching member 21 and the second sub-switching member 22 to move. At the same time, the elastic members 50 on the first push rod 214 and the second push rod 224 extend. The first sub-switching member 21 connects the first contact 11 and the second contact 12, and the second sub-switching member 22 connects the third contact 13 and the fourth contact 14. Also, the elastic member 50 on the third push rod 31 enables the second switching member 30 to be spaced apart from the fifth contact 15 and the sixth contact 16. When the switching device 100 is in the series state, the third coil 43 is powered, causing the third coil 43 to push the third push rod 31 to move, thereby pushing the second switching member 30 to move. At the same time, the elastic member 50 on the third push rod 31 extends. The second switching member 30 is connected to the fifth contact 15 and the sixth contact 16. Also, the elastic member 50 on the first push rod 214 enables the first sub-switching member 21 to be connected to the second contact 12 and spaced apart from the first contact 11, and the elastic member 50 on the second push rod 224 enables the second sub-switching member 22 to be connected to the third contact 13 and spaced apart from the fourth contact 14, meeting the required control requirements and being convenient to control. For example, the first push rod 214, the second push rod 224, and the third push rod 31 move under the magnetic field action of the first coil 41, the second coil 42, and the third coil 43 respectively.

[0127] The power distribution component according to an embodiment of the present invention includes a first power supply device 200, a second power supply device 300, and a switching device 100 according to an embodiment of the present invention. The first contact 11 and the third contact 13 are connected to the first power supply device 200, and the second contact 12 and the fourth contact 14 are connected to the second power supply device 300. In the first position, the first switching member 20 connects the first contact 11 and the second contact 12 and connects the third contact 13 and the fourth contact 14. The first power supply device 200 and the second power supply device 300 are connected in parallel, and can increase the power while ensuring that the voltage of the battery pack remains unchanged, meeting the required usage requirements; in the second position, the first switching member 20 connects the second contact 12 and the third contact 13, and the first power supply device 200 and the second power supply device 300 are connected in series, and can increase the voltage of the battery pack, so that the flowing current is small and the heat generation is low, meeting the required usage requirements. Thus, through the switching device 100, the switching between series connection and parallel connection of the first power supply device 200 and the second power supply device 300 can be realized, making the control convenient, meeting the required connection requirements, with low cost, compact structure, and facilitating the reduction of occupied space.

[0128] Since the switching device 100 according to an embodiment of the present invention has the above beneficial technical effects, the power distribution component according to an embodiment of the present invention, through the first contact 11 and the third contact 13 for connecting to the first power supply device 200, and the second contact 12 and the fourth contact 14 for connecting to the second power supply device 300, in the first position, the first switching member 20 connects the first contact 11 and the second contact 12 and connects the third contact 13 and the fourth contact 14, and the first power supply device 200 and the second power supply device 300 are connected in parallel; in the second position, the first switching member 20 connects the second contact 12 and the third contact 13, and the first power supply device 200 and the second power supply device 300 are connected in series, and can realize the switching between series connection and parallel connection of the first power supply device 200 and the second power supply device 300, avoiding the need for three contactors to achieve control in the related art, with a simple structure, capable of reducing costs, being beneficial to improving the integration degree, having a compact structure, saving space, and facilitating the reduction of weight.

[0129] The battery pack according to an embodiment of the present invention includes a power distribution component according to an embodiment of the present invention. Since the power distribution component according to an embodiment of the present invention has the above beneficial technical effects, the battery pack according to an embodiment of the present invention is used to connect to a first power supply device 200 through a first contact 11 and a third contact 13, and to connect to a second power supply device 300 through a second contact 12 and a fourth contact 14. In a first position, a first switching member 20 connects the first contact 11 and the second contact 12 and connects the third contact 13 and the fourth contact 14, and the first power supply device 200 and the second power supply device 300 are in parallel; in a second position, the first switching member 20 connects the second contact 12 and the third contact 13, and the first power supply device 200 and the second power supply device 300 are in series, so that the switching between series and parallel of the first power supply device 200 and the second power supply device 300 can be realized, avoiding the need for three contactors for control in the related art, with a simple structure, capable of reducing costs, being beneficial to improving the integration degree, having a compact structure, saving space, and being convenient for reducing weight.

[0130] The electrical device according to an embodiment of the present invention includes an electrical component 400 and a battery pack according to an embodiment of the present invention. One end of the electrical component 400 is connected to the first contact 11, and the other end of the electrical component 400 is connected to the fourth contact 14, so that the battery pack is connected to the electrical component 400 to meet the power supply requirement of the battery pack for the electrical component 400. For example, the electrical device can be a vehicle or the like.

[0131] Since the battery pack according to an embodiment of the present invention has the above beneficial technical effects, the electrical device according to an embodiment of the present invention is used to connect to a first power supply device 200 through a first contact 11 and a third contact 13, and to connect to a second power supply device 300 through a second contact 12 and a fourth contact 14. In a first position, a first switching member 20 connects the first contact 11 and the second contact 12 and connects the third contact 13 and the fourth contact 14, and the first power supply device 200 and the second power supply device 300 are in parallel; in a second position, the first switching member 20 connects the second contact 12 and the third contact 13, and the first power supply device 200 and the second power supply device 300 are in series, so that the switching between series and parallel of the first power supply device 200 and the second power supply device 300 can be realized, avoiding the need for three contactors for control in the related art, with a simple structure, capable of reducing costs, being beneficial to improving the integration degree, having a compact structure, saving space, and being convenient for reducing weight.

[0132] The control method of the electrical device according to an embodiment of the present invention, where the electrical device is the electrical device according to the above embodiment of the present invention. The control method includes:

[0133] Obtain the required voltage of the electrical component 400. For example, the required voltage of the electrical component 400 can be 400V or 800V required by the vehicle, etc.;

[0134] According to the required voltage of the electrical component 400, by controlling the series connection or parallel connection of the first power supply device 200 and the second power supply device 300 through the first switching component 20, the adjustment of different required voltages for the electrical component 400 can be achieved. For example, when the required voltage of the vehicle is 400V, the first switching component 20 is used to control the parallel connection of the first power supply device 200 and the second power supply device 300; when the required voltage of the vehicle is 800V, the first switching component 20 is used to control the series connection of the first power supply device 200 and the second power supply device 300, so as to meet the working requirements of the required electrical equipment.

[0135] In some embodiments, before obtaining the required voltage of the electrical component 400, the control method further includes:

[0136] Obtaining the power supply instructions of the first power supply device 200 and the second power supply device 300. In other words, the battery management system of the battery pack obtains the power supply instructions of the first power supply device 200 and the second power supply device 300;

[0137] Determining that the main fuse connection of the battery pack is normal, that is, the main fuse is not blown and the circuit connection is normal, which is convenient for subsequent operations and ensures the use safety;

[0138] Controlling the power supply of the first power supply device 200 and the second power supply device 300 to meet the required power supply demand.

[0139] Since the electrical equipment according to the embodiment of the present invention has the above-mentioned beneficial technical effects, the control method of the electrical equipment according to the embodiment of the present invention, through the first contact 11 and the third contact 13 for connecting to the first power supply device 200, and the second contact 12 and the fourth contact 14 for connecting to the second power supply device 300. In the first position, the first switching component 20 connects the first contact 11 and the second contact 12 and connects the third contact 13 and the fourth contact 14, and the first power supply device 200 and the second power supply device 300 are in parallel; in the second position, the first switching component 20 connects the second contact 12 and the third contact 13, and the first power supply device 200 and the second power supply device 300 are in series, which can realize the switching between the series and parallel connections of the first power supply device 200 and the second power supply device 300, avoiding the need for three contactors to achieve control in the related art, with a simple structure, which can reduce costs, is beneficial to improving the integration degree, has a compact structure, saves space, and is convenient for reducing weight.

[0140] In some embodiments of the present invention, the switching device 100 is the switching device 100 according to the above embodiments of the present invention. The plurality of stationary contacts 10 further includes a fifth contact 15 and a sixth contact 16. In the first position, the first switching member 20 is spaced apart from the fifth contact 15 and the sixth contact 16. In the second position, the first switching member 20 is connected to the fifth contact 15 and the sixth contact 16. The switching device 100 further includes a second switching member 30. The second switching member 30 is movable and has a third position and a fourth position. In the third position, the second switching member 30 is spaced apart from the fifth contact 15 and the sixth contact 16. In the fourth position, the second switching member 30 is connected to the fifth contact 15 and the sixth contact 16.

[0141] As Figure 12 shown, the control method includes:

[0142] Determine that the first power supply device 200 and the second power supply device 300 are connected in series;

[0143] Control the first sub-switching member 21 to be connected to the second contact 12 and the fifth contact 15, the second sub-switching member 22 to be connected to the third contact 13 and the sixth contact 16, and the second switching member 30 to be connected to the fifth contact 15 and the sixth contact 16. In other words, the first coil 41 and the second coil 42 are not powered, the third coil 43 is powered, the second switching member 30 can be driven to move through the third coil 43, and both the first sub-switching member 21 and the second sub-switching member 22 are driven to move through the elastic member 50, thereby realizing the series connection of the first power supply device 200 and the second power supply device 300;

[0144] Determine that M1 is less than or equal to the first threshold, where M1 is the potential difference between the third contact 13 and the second contact 12. In other words, determine whether the connection between the second switching member 30 and the fifth contact 15 and the sixth contact 16 is reliable, or perform an error handling when M1 is not less than or equal to the first threshold;

[0145] Determine that the connection is normal when the first power supply device 200 and the second power supply device 300 are in series connection, that is, the above detection can ensure the normal series connection of the first power supply device 200 and the second power supply device 300, which is beneficial to improving the reliability and safety of the circuit.

[0146] According to some embodiments of the present invention, as Figure 12 shown, the control method further includes:

[0147] Determine that the first power supply device 200 and the second power supply device 300 are connected in parallel;

[0148] Control the first sub-switching member 21 to connect the first contact 11 and the second contact 12, and the second sub-switching member 22 to connect the third contact 13 and the fourth contact 14. In other words, when the first coil 41 and the second coil 42 are powered, the first sub-switching member 21 and the second sub-switching member 22 are respectively driven to move through the first coil 41 and the second coil 42, thereby realizing the parallel connection of the first power supply device 200 and the second power supply device 300;

[0149] Determine that M2 is less than or equal to the second threshold and M3 is less than or equal to the third threshold, where M2 is the potential difference between the first contact 11 and the second contact 12, and M3 is the potential difference between the third contact 13 and the fourth contact 14. In other words, determine whether the connection between the first sub-switching member 21 and the first contact 11 and the second contact 12 is reliable and determine whether the connection between the second sub-switching member 22 and the third contact 13 and the fourth contact 14 is reliable. Or when M2 is less than or equal to the second threshold and M3 is less than or equal to the third threshold are not satisfied, perform an error reporting process;

[0150] Control the second switching member 30 to be spaced apart from the fifth contact 15 and the sixth contact 16. In other words, when the third coil 43 is powered off, the second switching member 30 is driven to move through the elastic member 50, avoiding problems such as short circuits caused by the contact between the second switching member 30, the fifth contact 15 and the sixth contact 16 and other structures, and ensuring the use safety;

[0151] Determine that M1 is greater than or equal to the fourth threshold. In other words, determine whether the disconnection between the second switching member 30 and the fifth contact 15 and the sixth contact 16 is reliable. Or when M1 is greater than or equal to the fourth threshold is not satisfied, perform an error reporting process;

[0152] Determine that when the first power supply device 200 and the second power supply device 300 are in parallel connection, the connection is normal, that is, through the above detections, it can be ensured that the parallel connection of the first power supply device 200 and the second power supply device 300 is normal, which is beneficial to improving the reliability and safety of the circuit. Thus, it is possible to switch the series connection of the first power supply device 200 and the second power supply device 300 to a parallel connection, meet the required connection requirements, and ensure the connection reliability and safety of the circuit, and realize the required use requirements.

[0153] In some embodiments of the present invention, as Figure 12 shown, the control method further includes:

[0154] Obtain the power-down signal of the electrical component 400;

[0155] Control the second switching member 30 to be spaced apart from the fifth contact 15 and the sixth contact 16. In other words, when the third coil 43 is powered off, the second switching member 30 is driven to move through the elastic member 50;

[0156] Determine that M1 is greater than or equal to the fourth threshold. In other words, determine whether the disconnection between the second switching member 30 and the fifth contact 15 and the sixth contact 16 is reliable. Or when M1 is less than the fourth threshold, perform an error handling operation.

[0157] Determine that the power-down of the electrical component 400 is normal, that is, through the above detections, it can be ensured that the first power supply device 200 and the second power supply device 300 are disconnected reliably, ensuring the safety of the circuit and avoiding potential circuit failures or safety hazards.

[0158] According to some embodiments of the present invention, the switching device 100 is the switching device 100 according to the above embodiments of the present invention. The plurality of stationary contacts 10 further include a fifth contact 15 and a sixth contact 16. In the first position, the first switching member 20 is spaced apart from the fifth contact 15 and the sixth contact 16. In the second position, the first switching member 20 is connected to the fifth contact 15 and the sixth contact 16. The switching device 100 further includes a second switching member 30. The second switching member 30 is movable and has a third position and a fourth position. In the third position, the second switching member 30 is spaced apart from the fifth contact 15 and the sixth contact 16. In the fourth position, the second switching member 30 is connected to the fifth contact 15 and the sixth contact 16.

[0159] As Figure 12 shown, the control method includes:

[0160] Determine that the first power supply device 200 and the second power supply device 300 are connected in parallel.

[0161] Control the first sub-switching member 21 to connect the first contact 11 and the second contact 12, the second sub-switching member 22 to connect the third contact 13 and the fourth contact 14, and the second switching member 30 to be spaced apart from the fifth contact 15 and the sixth contact 16. In other words, the first coil 41 and the second coil 42 are powered, the third coil 43 is not powered. The first sub-switching member 21 and the second sub-switching member 22 are respectively driven to move by the first coil 41 and the second coil 42, and the second switching member 30 is driven to move by the elastic member 50, thereby realizing the parallel connection of the first power supply device 200 and the second power supply device 300.

[0162] Determine that M2 is less than or equal to the second threshold and M3 is less than or equal to the third threshold. Wherein, M2 is the potential difference between the first contact 11 and the second contact 12, and M3 is the potential difference between the third contact 13 and the fourth contact 14. In other words, determine whether the connection between the first sub-switching member 21 and the first contact 11 and the second contact 12 is reliable and determine whether the connection between the second sub-switching member 22 and the third contact 13 and the fourth contact 14 is reliable. Or when M2 is greater than the second threshold and M3 is greater than the third threshold, perform an error handling operation.

[0163] Determine that when the first power supply device 200 and the second power supply device 300 are in parallel connection, the connection is normal, that is, through the above detection, it can be ensured that the parallel connection of the first power supply device 200 and the second power supply device 300 is normal, which is beneficial to improving the reliability and safety of the circuit.

[0164] In some embodiments of the present invention, such as Figure 12 shown, the control method further includes:

[0165] Determine that the first power supply device 200 and the second power supply device 300 adopt a series connection method;

[0166] Control the second switching member 30 to be connected to the fifth contact 15 and the sixth contact 16. In other words, when the third coil 43 is powered, the second switching member 30 can be driven to move through the third coil 43, which is convenient for the subsequent movement and connection requirements of the first sub-switching member 21 and the second sub-switching member 22, ensuring efficient switching;

[0167] Determine that M1 is less than or equal to the first threshold, where M1 is the potential difference between the third contact 13 and the second contact 12. In other words, determine whether the connection between the second switching member 30 and the fifth contact 15 and the sixth contact 16 is reliable, or perform an error handling when M1 is not less than or equal to the first threshold;

[0168] Control the first sub-switching member 21 to be connected to the second contact 12 and the fifth contact 15, and the second sub-switching member 22 to be connected to the third contact 13 and the sixth contact 16. In other words, when the first coil 41 and the second coil 42 are powered off, both the first sub-switching member 21 and the second sub-switching member 22 are driven to move through the elastic member 50, thereby realizing the series connection of the first power supply device 200 and the second power supply device 300;

[0169] Determine that M2 is greater than or equal to the fifth threshold and M3 is greater than or equal to the sixth threshold, determine whether the connection between the first sub-switching member 21 and the second contact 12 and the fifth contact 15 is reliable and determine whether the connection between the second sub-switching member 22 and the third contact 13 and the sixth contact 16 is reliable, or perform an error handling when M2 is not greater than or equal to the fifth threshold and M3 is not greater than or equal to the sixth threshold;

[0170] Determine that when the first power supply device 200 and the second power supply device 300 are in series connection, the connection is normal, that is, through the above detection, it can be ensured that the series connection of the first power supply device 200 and the second power supply device 300 is normal, which is beneficial to improving the reliability and safety of the circuit. Thus, it can realize the switching of the parallel connection of the first power supply device 200 and the second power supply device 300 to a series connection, meet the required connection requirements, and ensure the connection reliability and safety of the circuit, realizing the required usage requirements.

[0171] According to some embodiments of the present invention, the control method further includes:

[0172] Obtain the power-off signal of the electrical component 400;

[0173] Control the first sub-switching component 21 to be connected to the second contact 12 and the fifth contact 15, and the second sub-switching component 22 to be connected to the third contact 13 and the sixth contact 16. In other words, the first coil 41 and the second coil 42 are powered off, and both the first sub-switching component 21 and the second sub-switching component 22 are driven to move by the elastic component 50;

[0174] Determine that M2 is greater than or equal to the fifth threshold and M3 is greater than or equal to the sixth threshold, determine whether the connection between the first sub-switching component 21 and the second contact 12 and the fifth contact 15 is reliable and determine whether the connection between the second sub-switching component 22 and the third contact 13 and the sixth contact 16 is reliable, or perform an error handling when M2 is less than the fifth threshold or M3 is less than the sixth threshold;

[0175] Determine that the power-off of the electrical component 400 is normal, that is, through the above detection, it can be ensured that the first power supply device 200 and the second power supply device 300 are reliably disconnected, ensuring the safety of the circuit and avoiding potential circuit failures or safety hazards.

[0176] In some embodiments, as Figures 9 - 11 shown, there are four detection points on the electrical device. The first contact 11 is provided with a detection point a, the second contact 12 is provided with a detection point b, the third contact 13 is provided with a detection point c, the fourth contact 14 is provided with a detection point d. The potential difference between the third contact 13 and the second contact 12 is |Vc - Vb|, the potential difference between the first contact 11 and the second contact 12 is |Va - Vb|, the potential difference between the third contact 13 and the fourth contact 14 is |Vc - Vd|, the first threshold is Vth1, the second threshold is Vth2, the third threshold is Vth3, the fourth threshold is Vth4, the fifth threshold is Vth5, and the sixth threshold is Vth6, which can meet the detection requirements of the electrical device.

[0177] The control method of the electrical device includes:

[0178] Determine that the first power supply device 200 and the second power supply device 300 are connected in series;

[0179] Control the first sub-switching component 21 to be connected to the second contact 12 and the fifth contact 15, the second sub-switching component 22 to be connected to the third contact 13 and the sixth contact 16, and the second switching component 30 to be connected to the fifth contact 15 and the sixth contact 16. In other words, the first coil 41 and the second coil 42 are not powered, the third coil 43 is powered, the second switching component 30 can be driven to move by the third coil 43, and both the first sub-switching component 21 and the second sub-switching component 22 are driven to move by the elastic component 50, thereby realizing the series connection of the first power supply device 200 and the second power supply device 300;

[0180] Determine that |Vc - Vb| ≤ Vth1 is satisfied. In other words, determine whether the second switching member 30 is reliably connected to the fifth contact 15 and the sixth contact 16, or perform an error handling when |Vc - Vb| ≤ Vth1 is not satisfied;

[0181] Determine that when the first power supply device 200 and the second power supply device 300 are connected in series, the connection is normal, that is, through the above detection, it can be ensured that the first power supply device 200 and the second power supply device 300 are connected in series normally, which is beneficial to improving the reliability and safety of the circuit;

[0182] Perform pre-charging on the first power supply device 200 and the second power supply device 300, control the main positive contactor and the main negative contactor of the battery pack to be attracted, realize the pre-charging requirements for the first power supply device 200 and the second power supply device 300, complete the power-on of the first power supply device 200 and the second power supply device 300, and realize the connection of the circuit;

[0183] Determine that the first power supply device 200 and the second power supply device 300 adopt a parallel connection method;

[0184] Control the first sub-switching member 21 to connect the first contact 11 and the second contact 12, and the second sub-switching member 22 to connect the third contact 13 and the fourth contact 14. In other words, the first coil 41 and the second coil 42 are powered, and the first sub-switching member 21 and the second sub-switching member 22 are respectively driven to move through the first coil 41 and the second coil 42, thereby realizing the parallel connection of the first power supply device 200 and the second power supply device 300;

[0185] Determine that |Va - Vb| ≤ Vth2 and |Vc - Vd| ≤ Vth3 are satisfied. In other words, determine whether the first sub-switching member 21 is reliably connected to the first contact 11 and the second contact 12 and determine whether the second sub-switching member 22 is reliably connected to the third contact 13 and the fourth contact 14, or perform an error handling when |Va - Vb| ≤ Vth2 and |Vc - Vd| ≤ Vth3 are not satisfied;

[0186] Control the second switching member 30 to be spaced apart from the fifth contact 15 and the sixth contact 16. In other words, the third coil 43 is powered off, and the second switching member 30 is driven to move through the elastic member 50, avoiding problems such as short circuits caused by the second switching member 30, the fifth contact 15 and the sixth contact 16 contacting other structures, and ensuring the use safety;

[0187] Determine that |Vc - Vb| ≥ Vth4 is satisfied. In other words, determine whether the disconnection between the second switching member 30 and the fifth contact 15 and the sixth contact 16 is reliable, or perform an error handling when |Vc - Vb| ≥ Vth4 is not satisfied;

[0188] Determine that when the first power supply device 200 and the second power supply device 300 are in parallel connection, the connection is normal, that is, through the above detection, it can be ensured that the parallel connection of the first power supply device 200 and the second power supply device 300 is normal, which is beneficial to improving the reliability and safety of the circuit, and can realize the switching of the series connection of the first power supply device 200 and the second power supply device 300 to a parallel connection, meet the required connection requirements, and ensure the connection reliability and safety of the circuit, and realize the required usage requirements;

[0189] Judge whether the first power supply device 200 and the second power supply device 300 adopt a series connection method or power off;

[0190] If a power-off signal of the power-consuming component 400 is obtained;

[0191] Control the first sub-switching part 21 to be connected to the second contact 12 and the fifth contact 15, and the second sub-switching part 22 to be connected to the third contact 13 and the sixth contact 16. In other words, the first coil 41 and the second coil 42 are powered off, and both the first sub-switching part 21 and the second sub-switching part 22 are driven to move by the elastic part 50;

[0192] Determine that |Va - Vb| ≥ Vth5 and |Vc - Vd| ≥ Vth6 are satisfied, determine whether the connection between the first sub-switching part 21 and the second contact 12 and the fifth contact 15 is reliable, and determine whether the connection between the second sub-switching part 22 and the third contact 13 and the sixth contact 16 is reliable, or when |Va - Vb| ≥ Vth5 and |Vc - Vd| ≥ Vth6 are not satisfied, perform an error reporting process;

[0193] Determine that the power-off of the power-consuming component 400 is normal, that is, through the above detection, it can be ensured that the first power supply device 200 and the second power supply device 300 are disconnected reliably, ensuring the safety of the circuit and avoiding potential circuit failures or safety hazards;

[0194] If it is determined that the first power supply device 200 and the second power supply device 300 adopt a series connection method;

[0195] Control the second switching part 30 to be connected to the fifth contact 15 and the sixth contact 16. In other words, the third coil 43 is powered on, and the second switching part 30 can be driven to move through the third coil 43, facilitating the subsequent movement and connection requirements of the first sub-switching part 21 and the second sub-switching part 22, and ensuring efficient switching;

[0196] Determine that |Vc - Vb| ≤ Vth1 is satisfied, in other words, determine whether the connection between the second switching part 30 and the fifth contact 15 and the sixth contact 16 is reliable, or when |Vc - Vb| ≤ Vth1 is not satisfied, perform an error reporting process;

[0197] Control the first sub-switching member 21 to be connected to the second contact 12 and the fifth contact 15, and the second sub-switching member 22 to be connected to the third contact 13 and the sixth contact 16. In other words, the first coil 41 and the second coil 42 are powered off, and both the first sub-switching member 21 and the second sub-switching member 22 are driven to move by the elastic member 50, thereby realizing the series connection of the first power supply device 200 and the second power supply device 300;

[0198] Determine that |Va - Vb| ≥ Vth5 and |Vc - Vd| ≥ Vth6 are satisfied, determine whether the connection between the first sub-switching member 21 and the second contact 12 and the fifth contact 15 is reliable, and determine whether the connection between the second sub-switching member 22 and the third contact 13 and the sixth contact 16 is reliable. Or when |Va - Vb| ≥ Vth5 and |Vc - Vd| ≥ Vth6 are not satisfied, perform an error reporting process;

[0199] Determine that when the first power supply device 200 and the second power supply device 300 are in series connection, the connection is normal. That is, through the above detection, it can be ensured that the series connection of the first power supply device 200 and the second power supply device 300 is normal, which is beneficial to improving the reliability and safety of the circuit, can realize the switching of the parallel connection of the first power supply device 200 and the second power supply device 300 to a series connection, meet the required connection requirements, and ensure the connection reliability and safety of the circuit, and realize the required usage requirements;

[0200] Obtain the power-off signal of the electrical component 400;

[0201] Control the second switching member 30 to be spaced apart from the fifth contact 15 and the sixth contact 16. In other words, the third coil 43 is powered off, and the second switching member 30 is driven to move by the elastic member 50;

[0202] Determine that |Vc - Vb| ≥ Vth4 is satisfied. In other words, determine whether the disconnection between the second switching member 30 and the fifth contact 15 and the sixth contact 16 is reliable. Or when |Vc - Vb| ≥ Vth4 is not satisfied, perform an error reporting process;

[0203] Determine that the power-off of the electrical component 400 is normal. That is, through the above detection, it can be ensured that the first power supply device 200 and the second power supply device 300 are reliably disconnected, ensuring the safety of the circuit and avoiding potential circuit failures or safety hazards.

[0204] The other components and operations of the switching device 100, the power distribution component, the battery pack and the electrical equipment according to the embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail here.

[0205] In the description of the present invention, it should be noted that, unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0206] In the description of this specification, the descriptions with reference to the terms "embodiment", "specific embodiment", "example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0207] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A switching device, characterized in that: include: A plurality of stationary contacts (10), the plurality of stationary contacts (10) comprising a first contact (11), a second contact (12), a third contact (13) and a fourth contact (14), the first contact (11) and the third contact (13) being used to connect to a first power supply device (200), and the second contact (12) and the fourth contact (14) being used to connect to a second power supply device (300); a first switching member (20), the first switching member (20) being movable and having a first position and a second position, wherein in the first position, the first switching member (20) connects the first contact (11) and the second contact (12) and connects the third contact (13) and the fourth contact (14), and the first power supply device (200) and the second power supply device (300) are connected in parallel; In the second position, the first switching element (20) connects the second contact (12) and the third contact (13), and the first power supply device (200) and the second power supply device (300) are connected in series.

2. The switching device according to claim 1, characterized in that: The first switching member (20) comprises: A first sub-switching member (21) and a second sub-switching member (22), wherein the first sub-switching member (21) and the second sub-switching member (22) are movable. In the first position, the first sub-switching member (21) connects the first contact (11) and the second contact (12), and the second sub-switching member (22) connects the third contact (13) and the fourth contact (14); in the second position, the first sub-switching member (21) is connected to the second contact (12) and is spaced apart from the first contact (11), and the second sub-switching member (22) is connected to the third contact (13) and is spaced apart from the fourth contact (14).

3. The switching device according to claim 2, characterized in that: In the second position, the first sub-switching element (21) and the second sub-switching element (22) are connected.

4. The switching device according to claim 2, characterized in that: The plurality of stationary contacts (10) further include a fifth contact (15) and a sixth contact (16); in the first position, the first switching member (20) is spaced apart from the fifth contact (15) and the sixth contact (16); in the second position, the first switching member (20) is connected to the fifth contact (15) and the sixth contact (16); the switching device (100) further includes: A second switching member (30), the second switching member (30) is movable and has a third position and a fourth position, in which the second switching member (30) is spaced apart from the fifth contact (15) and the sixth contact (16) in the third position; and in the fourth position, the second switching member (30) is connected to the fifth contact (15) and the sixth contact (16).

5. The switching device according to claim 4, characterized in that: The first contact (11), the second contact (12) and the fifth contact (15) are arranged in sequence and spaced apart in the moving direction of the first sub-switching element (21); and the fourth contact (14), the third contact (13) and the sixth contact (16) are arranged in sequence and spaced apart in the moving direction of the second sub-switching element (22).

6. The switching device according to claim 5, characterized in that: The first sub-switching element (21) comprises: A first connecting portion (211), the first connecting portion (211) extending along an arrangement direction of the first contact point (11) and the second contact point (12) and located on one side of the second contact point (12); a first supporting arm (212) and a second supporting arm (213), wherein the first supporting arm (212) and the second supporting arm (213) are connected to both ends of the first connecting portion (211) in the length direction, the first supporting arm (212) is located between the first contact point (11) and the second contact point (12) and is suitable for connecting to the first contact point (11) or the second contact point (12), and the second supporting arm (213) is located between the second contact point (12) and the fifth contact point (15) and is suitable for connecting to the second contact point (12) or the fifth contact point (15), And / or, the second sub-switching element (22) comprises: A second connecting portion (221), the second connecting portion (221) extending along the arrangement direction of the third contact (13) and the fourth contact (14) and located on one side of the third contact (13); A third support arm (222) and a fourth support arm (223), wherein the third support arm (222) and the fourth support arm (223) are connected to both ends of the second connecting portion (221) in the length direction, wherein the third support arm (222) is located between the third contact (13) and the fourth contact (14) and is suitable for connecting to the third contact (13) or the fourth contact (14), and the fourth support arm (223) is located between the third contact (13) and the sixth contact (16) and is suitable for connecting to the third contact (13) or the sixth contact (16).

7. The switching device according to claim 4, characterized in that: The second switching element (30) is located between the first sub-switching element (21) and the second sub-switching element (22).

8. The switching device according to claim 4, characterized in that: The switching device (100) further comprises: A driving mechanism (40) is used to drive the first switching member (20) to move between the first position and the second position and to drive the second switching member (30) to move between the third position and the fourth position.

9. The switching device according to claim 8, characterized in that: The driving mechanism (40) comprises: A first coil (41), a second coil (42) and a third coil (43), wherein the first coil (41) and the second coil (42) respectively drive the first sub-switching element (21) and the second sub-switching element (22) to move between the first position and the second position, and the third coil (43) drives the second switching element (30) to move between the third position and the fourth position.

10. The switching device according to claim 9, characterized in that: The first coil (41) and the second coil (42) are electrically connected.

11. The switching device according to claim 9, characterized in that: The switching device (100) further comprises: An elastic member (50), the elastic member (50) being used to drive at least one of the first sub-switching member (21), the second sub-switching member (22) and the second switching member (30) to move in a direction close to the driving mechanism (40).

12. A power distribution assembly, characterized in that: include: A first power supply device (200) and a second power supply device (300); According to the switching device (100) according to any one of claims 1 to 11, the first contact (11) and the third contact (13) are connected to a first power supply device (200), and the second contact (12) and the fourth contact (14) are connected to a second power supply device (300); in the first position, the first switching member (20) connects the first contact (11) and the second contact (12) and connects the third contact (13) and the fourth contact (14), and the first power supply device (200) and the second power supply device (300) are connected in parallel; In the second position, the first switching element (20) connects the second contact (12) and the third contact (13), and the first power supply device (200) and the second power supply device (300) are connected in series.

13. A battery pack, characterized in that: Comprising a power distribution assembly according to claim 12.

14. An electrical device, characterized in that: include: The battery pack according to claim 13; An electrical component (400), one end of the electrical component (400) is connected to the first contact (11) and the other end is connected to the fourth contact (14).

15. A method for controlling an electrical device, characterized in that: The electrical equipment is the electrical equipment according to claim 14, and the control method comprises: Obtaining the required voltage of the electrical component (400); According to the required voltage of the electrical component (400), the first switching element (20) controls the first power supply device (200) and the second power supply device (300) to be connected in series or in parallel.

16. The control method of the electric equipment according to claim 15, characterized in that: The switching device (100) is the switching device (100) according to claim 4, and the control method comprises: Determining that the first power supply device (200) and the second power supply device (300) are connected in series; Controlling the first sub-switching element (21) to be connected to the second contact (12) and the fifth contact (15), the second sub-switching element (22) to be connected to the third contact (13) and the sixth contact (16), and the second switching element (30) to be connected to the fifth contact (15) and the sixth contact (16); Determining that M1 is less than or equal to a first threshold, wherein M1 is a potential difference between the third contact (13) and the second contact (12); It is determined that the first power supply device (200) and the second power supply device (300) are connected in series and the connection is normal.

17. The control method of the electric equipment according to claim 16, characterized in that: The control method further comprises: Determining that the first power supply device (200) and the second power supply device (300) are connected in parallel; Controlling the first sub-switching element (21) to connect the first contact (11) and the second contact (12), and controlling the second sub-switching element (22) to connect the third contact (13) and the fourth contact (14); Determining that M2 is less than or equal to a second threshold and M3 is less than or equal to a third threshold, wherein M2 is the potential difference between the first contact (11) and the second contact (12), and M3 is the potential difference between the third contact (13) and the fourth contact (14); Controlling the second switching member (30) to be spaced apart from the fifth contact (15) and the sixth contact (16); Determine that M1 is greater than or equal to a fourth threshold; It is determined that the first power supply device (200) and the second power supply device (300) are connected normally when they are in parallel connection.

18. The control method of the electric equipment according to claim 16, characterized in that: The control method further comprises: Obtaining a power-off signal of the electrical component (400); Controlling the second switching member (30) to be spaced apart from the fifth contact (15) and the sixth contact (16); Determine that M1 is greater than or equal to a fourth threshold; It is determined that the power-off of the electrical component (400) is normal.

19. The method for controlling an electric device according to claim 15, characterized in that: The switching device (100) is the switching device (100) according to claim 4, and the control method comprises: Determining that the first power supply device (200) and the second power supply device (300) are connected in parallel; Controlling the first sub-switching element (21) to connect the first contact (11) and the second contact (12), controlling the second sub-switching element (22) to connect the third contact (13) and the fourth contact (14), and the second switching element (30) to be spaced apart from the fifth contact (15) and the sixth contact (16); Determining that M2 is less than or equal to a second threshold and M3 is less than or equal to a third threshold, wherein M2 is the potential difference between the first contact (11) and the second contact (12), and M3 is the potential difference between the third contact (13) and the fourth contact (14); It is determined that the first power supply device (200) and the second power supply device (300) are connected normally when they are in parallel connection.

20. The control method of the electric equipment according to claim 19, characterized in that: The control method further comprises: Determining that the first power supply device (200) and the second power supply device (300) are connected in series; controlling the second switching element (30) to be connected to the fifth contact (15) and the sixth contact (16); Determining that M1 is less than or equal to a first threshold, wherein M1 is a potential difference between the third contact (13) and the second contact (12); Controlling the first sub-switching element (21) to be connected to the second contact (12) and the fifth contact (15), and controlling the second sub-switching element (22) to be connected to the third contact (13) and the sixth contact (16); Determine that M2 is greater than or equal to a fifth threshold and M3 is greater than or equal to a sixth threshold; It is determined that the first power supply device (200) and the second power supply device (300) are connected in series and the connection is normal.

21. The control method of the electric equipment according to claim 19, characterized in that: Also includes: Obtaining a power-off signal of the electrical component (400); Controlling the first sub-switching element (21) to be connected to the second contact (12) and the fifth contact (15), and controlling the second sub-switching element (22) to be connected to the third contact (13) and the sixth contact (16); Determine that M2 is greater than or equal to a fifth threshold and M3 is greater than or equal to a sixth threshold; It is determined that the power-off of the electrical component (400) is normal.

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