Electric vehicle power supply protection device

Abstract

The utility model discloses a power supply protection device for an electric vehicle. The power supply protection device comprises a shell, a protection part and a contactor, the shell comprises a bottom plate and an upper cover, and the upper cover and the bottom plate are closed to form a cavity for accommodating the protection part and the contactor; the protection part comprises a fuse, a base and a connecting block; two ends of the fuse are fixed on the bottom plate through the base; the connecting block comprises a first connecting sheet and a second connecting sheet; the input ends of the multiple bases are connected through a first connecting piece, and the output end of one base is connected with the input end of the contactor through a second connecting piece. By arranging the protection part and the contactor, the fuse and the contactor can be arranged on the power supply circuit of the electric vehicle, the connection between the power supply and the motor controller is automatically disconnected when the vehicle does not run, the self-discharge condition is reduced, and the service life of a battery of the electric vehicle is prolonged; when the vehicle has an electrical fault, the main power supply can be cut off in time, and the safety of the vehicle is improved.

Description

Technical Field

[0001] The utility model relates to the field of power protection, in particular to a power protection device for electric vehicles. Background Art

[0002] With the development of electric vehicles, lithium batteries are increasingly widely used as the power source of electric vehicles. When an electrical fault occurs in the vehicle, the power control system in the electric vehicle can timely cut off the main power supply to ensure the safety of the vehicle. The existing power control system of electric vehicles adopts a direct connection method between the power supply and the motor controller. When the vehicle is not in use, the lithium battery is not disconnected from the motor controller, resulting in fast self-discharge. If the power supply is not timely turned off, it may cause over-discharge of the vehicle and damage the battery, affecting the safety of the electric vehicle and the service life of the battery. Summary of the Invention

[0003] To solve the above problems, the purpose of the utility model is to provide a power protection device for electric vehicles, which can add a power protection device for electric vehicles between the power supply of the electric vehicle and the motor controller, automatically disconnect the connection between the power supply and the motor controller when the vehicle is not running, reduce the self-discharge situation; at the same time, when an electrical fault occurs in the vehicle, it can timely cut off the main power supply to improve the safety of the vehicle.

[0004] The technical solution adopted by the utility model to solve its problems is:

[0005] A power protection device for electric vehicles includes a housing, a protection part and a contactor; the housing includes a bottom plate and an upper cover, and the upper cover and the bottom plate are covered to form a cavity for accommodating the protection part and the contactor; the protection part includes a fuse, a base and a connection block, and both ends of the fuse are fixed on the bottom plate through the base; the connection block includes a first connection piece and a second connection piece; the input ends of multiple bases are connected through the first connection piece, and the output end of one of the bases is connected to the input end of the contactor through the second connection piece; a support frame is also arranged on the bottom plate, and a support bolt for fixing the upper cover is movably arranged on the support frame.

[0006] The above power protection device for electric vehicles has at least the following beneficial effects: by setting the protection part and the contactor, a fuse and a contactor can be set on the power supply line of the electric vehicle, automatically disconnect the connection between the power supply and the motor controller when the vehicle is not running, reduce the self-discharge situation, and improve the service life of the battery of the electric vehicle; when an electrical fault occurs in the vehicle, it can timely cut off the main power supply to improve the safety of the vehicle; by setting the bottom plate and the upper cover, the protection part and the contactor can be quickly and stably fixed in the vehicle through the support frame, improving the stability and installation convenience of the power protection device for electric vehicles.

[0007] Further, the fuse includes a main fuse and a spare fuse. The first end of the main fuse is connected to the first end of the spare fuse through the first connecting piece, and the second end of the main fuse is connected to the contactor through the second connecting piece. By providing the main fuse and the spare fuse, it is convenient to fix the input end of the base, and also ensures the connection stability between the fuse and the contactor, avoiding loosening, which affects the structural stability of the electric vehicle power protection device.

[0008] Further, the plane where the second end of the main fuse is located is perpendicular to the plane where the input end of the contactor is located. This structure effectively shortens the distance between the main fuse and the contactor, improving the space utilization rate of the electric vehicle power protection device.

[0009] Further, both the main fuse and the spare fuse are flat fuses. Flat fuses have the advantages of strong structural stability and high precision of fusing current. Both the main fuse and the spare fuse being flat fuses can effectively ensure the protection performance of the electric vehicle power protection device.

[0010] Further, the protection part further includes a control seat, and the control seat is located on one side of the base close to the second end of the main fuse. By providing the control seat, it is convenient for maintenance personnel to quickly disconnect or connect the protection part and the contactor through the control seat, improving the maintenance convenience of the electric vehicle power protection device.

[0011] Further, the bases corresponding to the main fuse and the bases corresponding to the spare fuse are arranged side by side. This structure ensures that the main fuse and the spare fuse can be stably fixed on the bottom plate, and also effectively shortens the distance between multiple bases, improving the space utilization rate of the electric vehicle power protection device.

[0012] Further, the control seat is electrically connected to the contactor. The electrical connection between the control seat and the contactor can ensure that the control seat can quickly disconnect or connect the protection part and the contactor, effectively improving the protection performance of the electric vehicle power protection device.

[0013] Further, the contactor is fixed on the side of the base through a mounting bracket. By providing the mounting bracket, it is ensured that the contactor can be stably and accurately fixed on the base, avoiding loosening of the contactor during use, which affects the working stability of the electric vehicle power protection device.

[0014] Further, a plurality of fixing bolts are provided on the bottom plate. By providing the fixing bolts, it is convenient to stably fix the bottom plate and the upper cover on the vehicle, avoiding loosening of the protection part and the contactor during use, and improving the stability of the electric vehicle power protection device.

[0015] Further, a window is provided on the upper cover, which is adapted to the input end of the base and the output end of the contactor. By providing the window, it is convenient to wire the input end of the base and the output end of the contactor, improving the installation convenience of the electric vehicle power protection device.

[0016] The beneficial effects of the above-mentioned electric vehicle power protection device are as follows: By providing the protection part and the contactor, a fuse and a contactor can be set on the power supply line of the electric vehicle. When the vehicle is not running, the connection between the power supply and the motor controller is automatically disconnected, reducing the self-discharge situation and increasing the battery service life of the electric vehicle; when an electrical fault occurs in the vehicle, the main power supply can be cut off in time, improving the safety of the vehicle; by providing the bottom plate and the upper cover, the protection part and the contactor can be quickly and stably fixed in the vehicle through the support frame, improving the stability and installation convenience of the electric vehicle power protection device; by providing the main fuse and the spare fuse, it is convenient to fix the input end of the base and also ensure the connection stability between the fuse and the contactor, avoiding loosening and affecting the structural stability of the electric vehicle power protection device; by providing the control seat, it is convenient for maintenance personnel to quickly disconnect or connect the protection part and the contactor through the control seat, improving the maintenance convenience of the electric vehicle power protection device.

[0017] The additional aspects and advantages of the present invention will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and additional aspects and advantages of the present invention will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0019] Figure 1 is a schematic structural diagram of an electric vehicle power protection device according to an embodiment of the present invention;

[0020] Figure 2 is a schematic structural diagram of an electric vehicle power protection device from another angle according to an embodiment of the present invention;

[0021] Figure 3 is an exploded view of the structure of an electric vehicle power protection device according to an embodiment of the present invention;

[0022] Figure 4 is an exploded view of the structure of an electric vehicle power protection device according to another embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation of the present utility model.

[0024] Referring Figures 1 to 4 , an embodiment of the present utility model provides an electric vehicle power protection device, which includes a housing 100, a protection part 200 and a contactor 300; the housing 100 includes a bottom plate 110 and an upper cover 120, and the upper cover 120 and the bottom plate 110 are covered to form a cavity 130 for accommodating the protection part 200 and the contactor 300; the protection part 200 includes a fuse 210, a base 220 and a connection block 230, and both ends of the fuse 210 are fixed on the bottom plate 110 through the base 220; the connection block 230 includes a first connection piece 231 and a second connection piece 232; the input ends of multiple bases 220 are connected through the first connection piece 231, and the output end of one of the bases 220 is connected to the input end of the contactor 300 through the second connection piece 232; a support frame 140 is further provided on the bottom plate 110, and a support bolt 141 for fixing the upper cover 120 is movably arranged on the support frame 140.

[0025] By providing the protection part 200 and the contactor 300, a fuse 210 and a contactor 300 can be arranged on the power supply line of the electric vehicle, automatically disconnecting the connection between the power supply and the motor controller when the vehicle is not running, reducing the self-discharge situation, and improving the battery service life of the electric vehicle; when an electrical fault occurs in the vehicle, the main power supply can be cut off in time, improving the safety of the vehicle; by providing the bottom plate 110 and the upper cover 120, the protection part 200 and the contactor 300 can be quickly and stably fixed in the vehicle through the support frame 140, improving the stability and installation convenience of the electric vehicle power protection device.

[0026] In another embodiment, the fuse 210 includes a main fuse 211 and a spare fuse 212. The first end of the main fuse 211 is connected to the first end of the spare fuse 212 through the first connection piece 231, and the second end of the main fuse 211 is connected to the contactor 300 through the second connection piece 232. By providing the main fuse 211 and the spare fuse 212, it is convenient to fix the input end of the base 220, and also ensures the connection stability between the fuse 210 and the contactor 300, avoiding loosening and affecting the structural stability of the electric vehicle power protection device.

[0027] In another embodiment, the plane where the second end of the main fuse 211 is located is perpendicular to the plane where the input end of the contactor 300 is located. This structure effectively shortens the distance between the main fuse 211 and the contactor 300, improving the space utilization rate of the electric vehicle power protection device.

[0028] In another embodiment, both the main fuse 211 and the backup fuse 212 are flat fuses. Flat fuses have the advantages of strong structural stability and high precision of fusing current. The fact that both the main fuse 211 and the backup fuse 212 are flat fuses can effectively ensure the protection performance of the electric vehicle power protection device.

[0029] In another embodiment, the protection part 200 further includes a control seat 240, and the control seat 240 is located on one side of the second end of the base 220 close to the main fuse 211. By providing the control seat 240, it is convenient for maintenance personnel to quickly disconnect or connect the protection part 200 and the contactor 300 through the control seat 240, improving the maintenance convenience of the electric vehicle power protection device.

[0030] In another embodiment, the base 220 corresponding to the main fuse 211 and the base 220 corresponding to the backup fuse 212 are arranged side by side. This structure ensures that the main fuse 211 and the backup fuse 212 can be stably fixed on the bottom plate 110, and also effectively shortens the distance between multiple bases 220, improving the space utilization rate of the electric vehicle power protection device.

[0031] In another embodiment, the control seat 240 is electrically connected to the contactor 300. The electrical connection between the control seat 240 and the contactor 300 can ensure that the control seat 240 can quickly disconnect or connect the protection part 200 and the contactor 300, effectively improving the protection performance of the electric vehicle power protection device.

[0032] In another embodiment, the contactor 300 is fixed to the side of the base 220 through a mounting bracket 310. By providing the mounting bracket 310, it is ensured that the contactor 300 can be stably and accurately fixed on the base 220, avoiding the situation that the contactor 300 becomes loose during use and affecting the working stability of the electric vehicle power protection device.

[0033] In another embodiment, a plurality of fixing bolts 111 are provided on the bottom plate 110. By providing the fixing bolts 111, it is convenient to stably fix the bottom plate 110 and the upper cover 120 on the vehicle, avoiding the situation that the protection part 200 and the contactor 300 become loose during use, and improving the stability of the electric vehicle power protection device.

[0034] In another embodiment, the upper cover 120 is provided with a window 121 that cooperates with the input end of the base 220 and the output end of the contactor 300. By providing the window 121, it is convenient to wire the input end of the base 220 and the output end of the contactor 300, improving the installation convenience of the electric vehicle power protection device.

[0035] The working principle of the present utility model will be further described below.

[0036] During the installation process, according to the specifications of the vehicle power supply and the motor controller, select the corresponding fuse 210 and contactor 300, so that the fuse 210 and the contactor 300 are located between the vehicle power supply and the motor controller, and connect or disconnect the connection between the vehicle power supply and the motor controller according to requirements. Among them, the contactor 300 is a widely used switching electrical appliance. Using electromagnetic, pneumatic or hydraulic principles, it realizes the on-off of the main circuit through the control circuit. Therefore, the contactor has the advantages of strong current-breaking ability, rapid action, safe operation, ability to operate frequently and remote control. The contactor 300 is mainly used to connect and disconnect the power supply. As a main circuit component, the core task of the contactor 300 is to control the on-off of the main circuit. When a specific task needs to be executed, the contactor 300 can connect the circuit; and when ensuring the safety and reliability of the circuit, it can also disconnect the circuit according to requirements. Open the upper cover 120, pass the input wire of the electric vehicle power protection device through the window 121 and fix it on the input end of the base 220, and connect it to the main fuse 211 and the spare fuse 212 through the first connecting piece 231; pass the output wire of the electric vehicle power protection device through the window 121 and fix it on the output end of the contactor 300; then, cover the upper cover 120 and the bottom plate 110 to form a cavity 130 for accommodating the protection part 200 and the contactor 300, so as to ensure that the protection part 200 and the contactor 300 can be stably fixed in the housing 100 and prevent the internal components of the electric vehicle power protection device from being damaged during operation; finally, fix the housing 100 in the vehicle through the fixing bolts 111 and the support bolts 141. Among them, the number of fixing bolts 111 is two, and the housing 100 can be fixed between the vehicle power supply and the motor controller stably and flexibly through three-point fixing, preventing the electric vehicle power protection device from loosening during operation.

[0037] During use, when the vehicle is not running, the contactor 300 automatically disconnects the connection between the power supply and the motor controller, reducing the self-discharge situation; at the same time, when an electrical fault occurs in the vehicle, the fuse 210 can cut off the connection between the power supply and the motor controller in time, improving the safety of the vehicle.

[0038] As can be seen from the above description, the electric vehicle power protection device of the present utility model can set a fuse 210 and a contactor 300 on the power supply line of the electric vehicle by setting a protection part 200 and a contactor 300. When the vehicle is not running, the connection between the power supply and the motor controller is automatically disconnected, reducing the self-discharge situation and improving the battery service life of the electric vehicle; when an electrical fault occurs in the vehicle, the main power supply can be cut off in time to improve the safety of the vehicle; by setting a bottom plate 110 and an upper cover 120, the protection part 200 and the contactor 300 can be quickly and stably fixed in the vehicle through a support frame 140, improving the stability and installation convenience of the electric vehicle power protection device; by setting a main fuse 211 and a spare fuse 212, it is convenient to fix the input end of the base 220 and also ensures the connection stability between the fuse 210 and the contactor 300, avoiding loosening and affecting the structural stability of the electric vehicle power protection device; by setting a control seat 240, it is convenient for maintenance personnel to quickly disconnect or connect the protection part 200 and the contactor 300 through the control seat 240, improving the maintenance convenience of the electric vehicle power protection device.

[0039] The embodiments of the present utility model have been described in detail above in conjunction with the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various changes can be made without departing from the purpose of the present utility model.

Claims

1. An electric vehicle power supply protection device, characterized in that, It includes a housing, a protection part and a contactor; the housing includes a bottom plate and an upper cover, and the upper cover and the bottom plate are covered to form a cavity for accommodating the protection part and the contactor; The protection part includes a fuse, a base and a connecting block. Both ends of the fuse are fixed on the bottom plate through the base; the connecting block includes a first connecting piece and a second connecting piece; the input ends of multiple bases are connected through the first connecting piece, and the output end of one of the bases is connected to the input end of the contactor through the second connecting piece; a support frame is also provided on the bottom plate, and a support bolt for fixing the upper cover is movably arranged on the support frame.

2. The electric vehicle power supply protection device according to claim 1, wherein The fuse includes a main fuse and a spare fuse. The first end of the main fuse is connected to the first end of the spare fuse through the first connecting piece, and the second end of the main fuse is connected to the contactor through the second connecting piece.

3. The electric vehicle power supply protection device according to claim 2, characterized in that, The plane where the second end of the main fuse is located is perpendicular to the plane where the input end of the contactor is located.

4. The electric vehicle power supply protection device according to claim 2, characterized in that, Both the main fuse and the spare fuse are flat fuses.

5. The electric vehicle power supply protection device according to claim 2, characterized in that, The protection part further includes a control seat, and the control seat is located on one side of the base close to the second end of the main fuse.

6. The electric vehicle power supply protection device according to claim 5, characterized in that, The base corresponding to the main fuse and the base corresponding to the spare fuse are arranged side by side.

7. An electric vehicle power supply protection device according to claim 5, characterized in that, The control seat is electrically connected to the contactor.

8. A power protection device for an electric vehicle according to claim 1, characterized in that, The contactor is fixed on the side of the base through a mounting bracket.

9. The power supply protection device for an electric vehicle according to claim 1, characterized in that, Multiple fixing bolts are provided on the bottom plate.

10. A power protection device for an electric vehicle according to claim 1, characterized in that, Windows matching the input end of the base and the output end of the contactor are provided on the upper cover.

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