Direct-current high-breaking intelligent circuit breaker for electric automobile

Abstract

The utility model provides a direct current high breaking intelligent circuit breaker for an electric automobile, which comprises a shell, a static sheet part, a short circuit protection moving contact part and an electromagnetic valve part, a moving iron core in the electromagnetic valve part is connected with a push rod, the push rod is connected with the short circuit protection moving contact part, a control panel is arranged in the shell, and the control panel is connected with the electromagnetic valve part. The electromagnetic valve component is connected with the control panel, and the control panel is connected with a control center. The utility model relates to a new technology which combines a contactor structure, short-circuit tripping and direct-current arc steering and integrates a switching function and a protection function, provides load breaking and overload and short-circuit breaking capacities, is resettable and does not need to replace equipment.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric vehicles, and in particular relates to a DC high-breaking intelligent circuit breaker for electric vehicles. Background Art

[0002] In recent years, with the continuous improvement of people's quality of life, cars have gradually entered people's homes and become a means of transportation for the majority of people. At the same time, more and more gas emissions have polluted the environment. Under the background of environmental protection departments advocating green environmental protection, electric vehicles for various purposes have emerged and their market share has increased significantly.

[0003] In existing new energy electric vehicles, the battery and the motor are connected to the AC contactor through a fuse. When the current is too large, the fuse burns out and the circuit is disconnected, which provides short-circuit protection or overload protection. However, this combination has limitations.

[0004] For example, traditional AC contactors will only disconnect when the car is not started and there is no current. When a car accident occurs, if the electric car is damaged but the power is not cut off, and the people in the car are injured and unconscious and unable to shut down the car by themselves, the AC contactor cannot disconnect, which is very dangerous.

[0005] On the other hand, when the car owner encounters a broken fuse, he cannot replace or repair it by himself and can only go to a 4S shop for repair, which makes the car unusable and causes trouble to the car owner. Utility Model Content

[0006] In order to solve the above technical problems, the utility model proposes a DC high-break intelligent circuit breaker for electric vehicles, including a shell, the shell is divided into two upper and lower spaces, a group of static sheet components and short-circuit protection moving contact components are arranged in the upper space, the static sheet components are fixedly installed in the shell, do not contact each other, and one end of each of them passes through the outside of the shell, and a static contact is arranged on the upper surface of the other end, the short-circuit protection moving contact component is located at the upper end of the static sheet component, and a group of moving contacts are arranged on the lower surface of the short-circuit protection moving contact component, and the moving contacts correspond to the static contacts respectively, and the static sheet component and the short-circuit protection moving contact component form a DC circuit through the contact between the static contacts and the moving contacts, and a solenoid valve component is fixedly arranged in the lower space, and the moving iron core in the solenoid valve component is connected to a push rod, and the push rod is connected to the short-circuit protection moving contact component, and the moving distance of the moving iron core is greater than or equal to the distance that the short-circuit protection moving contact component moves up and down in the upper space so that the moving contact touches the static contact, and a control board is arranged in the shell, and the solenoid valve component is connected to the control board.

[0007] Furthermore, the solenoid valve component includes a coil frame, a coil, a moving iron core, a push rod, an armature cover, and a U-shaped yoke. The coil frame is arranged in the U-shaped yoke. The U-shaped yoke opens upward, and an armature cover is provided at the opening. The armature cover is provided with an opening adapted to the size of the push rod. The moving iron core is larger than the opening of the armature cover. The coil frame is a hollow structure. The moving iron core moves up and down in the hollow structure. A coil is wrapped around the outside of the coil frame, and the coil pins of the coil are connected to the control board.

[0008] Furthermore, the solenoid valve component is a magnetically latching solenoid valve, and a group of magnetically latching permanent magnets are disposed opposite to each other on the left and right sides of the middle of the coil skeleton, and the magnetically latching permanent magnets are opposite to each other with the same poles.

[0009] Furthermore, the short-circuit protection moving contact component is a bridge-type moving contact component, including a bridge-type fixing block, a C-type bridge-type moving piece, a small moving contact, a large moving contact, an arc-starting piece, an arc-extinguishing chamber, a compression spring piece and a clamp. The upper part of the bridge-type fixing block is provided with a groove adapted to the shape of the C-type bridge-type moving piece. The C-type bridge-type moving piece is arranged in the bridge-type fixing block and is fixed by the compression spring piece and the clamp. The C-type opening is located above one side of the static piece component. Two small moving contacts and one large moving contact are respectively arranged on both sides below the C-type opening of the C-type bridge-type moving piece and on the corresponding other side. The small moving contact and the large moving contact are arranged on both sides below the C-type opening of the C-type bridge-type moving piece. The moving contacts correspond to the static contacts on the static sheet component respectively, the push rod is connected to the bridge-type fixed block through a tripping device, the side walls at the bending parts of the two ends of the C-type bridge-type moving piece are thinner than the thickness of other side walls, the C-type bridge-type moving piece is provided with four arc-striking pieces extending outward, the inner ends of the arc-striking pieces are connected to the left and right outer sides of the two small moving contacts and the large moving contact, a group of arc-extinguishing chambers are respectively provided on the upper surface of the static sheet component, the arc-striking pieces extend into the arc-extinguishing chambers, the height of the arc-extinguishing chambers is greater than or equal to the upper and lower movable heights of the arc-striking pieces, and an elastic device is provided between the push rod and the bridge-type fixed block.

[0010] Furthermore, the tripping device includes a tripping rotating rod, a tripping compression spring and a tripping piece, the upper end of the push rod is provided with a groove, the tripping rotating rod is provided in the groove through the rotation of the rotating shaft, the tripping rotating rod is provided with the tripping compression spring, the other side of the tripping compression spring is against the inner wall of the groove, the tripping rotating rod is provided with a protrusion on the back of the tripping compression spring, the bridge-type fixed block is provided with an opening corresponding to the tripping rotating rod, and the side wall of the opening is provided with an arc-shaped protrusion corresponding to the protrusion of the tripping rotating rod, the tripping pieces are provided at both ends of the opening of the C-shaped bridge-type moving plate, the end of the tripping piece is provided with a hook portion bent inwardly, and the hook portion of the tripping piece is clamped in the end protrusion of the tripping rotating rod.

[0011] Furthermore, a manganese-copper shunt and a static connecting piece are installed at the outer end of one of the static sheet components, the manganese-copper shunt is connected to the control board, and the static connecting piece extends to the outside of the shell.

[0012] Furthermore, the manganese-copper shunt is arranged in multiple layers.

[0013] Furthermore, the shell includes a large base, a base cover, an upper cover and a side cover. The large base and the base cover can be combined into one by fasteners to form two upper and lower spaces. The control panel is provided on the outside of the large base. The side cover is covered on the large base by side cover screws. The upper cover is connected to the large base and the base cover by fasteners.

[0014] Furthermore, the upper cover is T-shaped, the large base and the base cover are provided with grooves adapted to the convex shape of the upper cover, the convex part of the upper cover covers the solenoid valve component, and a group of magnetically blown permanent magnets are relatively provided on the inner side wall of the convex part of the upper cover, and a group of limiting compression springs are provided on the inner side wall of the bottom of the upper cover, and the limiting compression springs correspond to the short-circuit protection moving contact component.

[0015] Furthermore, a socket is provided on the outside of the shell, and the control board is connected to the control center through the socket.

[0016] Beneficial effects: The utility model provides a vehicle-mounted circuit breaker, which solves the design drawbacks of the traditional vehicle-mounted fuse (fuse) connected to the AC contactor. The utility model is a new technology that combines the contactor structure, short-circuit tripping and DC arc steering, and integrates the switch and protection functions. The circuit breaker of the utility model can be installed on any circuit that needs to be protected in the car. When installed on the line of the power motor, the two ends of the outer side of the static piece component are respectively connected to the power supply and the motor, providing load breaking and overload and short-circuit breaking capabilities, achieving the advantages of short-circuit protection, overload protection, energy saving, etc. In addition, the circuit breaker of the utility model is resettable and does not require replacement of equipment.

[0017] 1. Normal state: When the car starts normally, the solenoid valve is powered through the control board. When there is a positive voltage, the moving iron core of the solenoid valve moves downward with the magnetic field, and under the action of the magnetic field, the short-circuit protection moving contact part is attracted to the solenoid valve, so that the static contact and the moving contact are in contact, forming a circuit, connecting the power supply of the two static parts and the motor. On the contrary, when the car is turned off, the circuit is naturally disconnected from the power supply.

[0018] 2. Abnormal vehicle status: When the vehicle encounters a traffic accident or other serious abnormal status, the control center determines the danger level and sends a command to the control board if necessary. The control board supplies reverse voltage to the solenoid valve, which repels the short-circuit protection moving contact component in the opposite direction of the solenoid valve, separating the static contact and the moving contact, disconnecting the circuit, and also disconnecting the power supply and the motor.

[0019] 3. Short circuit protection: When the circuit of the utility model is short-circuited, the current of the C-type bridge movable piece is too large, generating a magnetic field. Due to the shape characteristics of the C-type bridge movable piece, the opening and the corresponding other side generate a repulsive force, and the opening can form a micro-deformation, and will deform outward. The tripping device is disengaged, and the push rod and the bridge fixed block are instantly bounced open under the action of the elastic device, so that the moving contact and the static contact are separated, which plays a role in short circuit protection.

[0020] 4. Overload protection: Set the current threshold in the control board, collect the current through the manganese bronze shunt, and calculate through the control board. When the current is greater than the threshold, the control board will give the solenoid valve a reverse current, disconnect the circuit within the set time, and achieve overload protection.

[0021] 5. Energy saving: The magnetic field circuit generated by the magnetic holding permanent magnets with the same poles facing each other will attract the moving iron core, and the voltage supplied to the coil by the control board can be reduced. The energy consumption can be reduced intelligently through the control board to achieve the purpose of energy saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 This is an exploded diagram of a DC high-breakage intelligent circuit breaker for electric vehicles of the utility model;

[0024] Figure 2 This is a three-dimensional diagram of the internal structure of a DC high-breakage intelligent circuit breaker for electric vehicles of the utility model;

[0025] Figure 3 This is an exploded diagram of a magnetic latching solenoid valve component of a DC high-breaking intelligent circuit breaker for electric vehicles of the utility model;

[0026] Figure 4 This is an exploded diagram of the moving contact parts of a DC high-breaking intelligent circuit breaker for electric vehicles of the utility model;

[0027] Figure 5 This is an exploded diagram of the upper cover of a DC high-breakage intelligent circuit breaker for electric vehicles;

[0028] Figure 6 This is a structural diagram of the locking state of a tripping device of a DC high-breaking intelligent circuit breaker for electric vehicles of the utility model;

[0029] Figure 7The utility model discloses a structure diagram of a tripping device of a DC high-breaking intelligent circuit breaker for electric vehicles in a disengaged state.

[0030] The meanings of the reference numerals in the figures are as follows:

[0031] 1. Limiting compression spring; 2. Static plate component; 3. Short-circuit protection moving contact component; 31. Bridge type fixing block; 32. C-type bridge type moving plate; 33. Arc-starting plate; 34. Arc-extinguishing chamber; 35. Compression spring plate; 36. Clamp; 4. Static contact; 5. Moving contact; 51. Small moving contact, 52. Large moving contact; 6. Solenoid valve component; 61. Coil skeleton; 62. Moving iron core; 63. Push rod; 64. Armature cover; 65. U-shaped yoke; 66. Magnetic holding permanent magnet; 7. Control board; 8. Tripping rotating rod; 9. Tripping compression spring; 10. Tripping component; 11. Elastic device; 12. Manganese copper shunt; 13. Static connecting plate; 14. Large base; 15. Base cover; 16. Upper cover; 17. Side cover; 18. Magnetic blowing permanent magnet. DETAILED DESCRIPTION

[0032] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0033] like Figure 1-7 As shown, a DC high-break intelligent circuit breaker for electric vehicles includes a shell, the shell is divided into two spaces, the upper space is provided with a group of static sheet components 2 and short-circuit protection moving contact components 3, the static sheet components 2 are fixedly installed in the shell, do not contact each other, and one end of each is passed through the outside of the shell to connect the power supply and the load respectively, and the upper surface of the other end is provided with a static contact 4, the short-circuit protection moving contact component 3 is located at the upper end of the static sheet component 2, and the lower surface of the short-circuit protection moving contact component 3 is provided with a group of moving contacts 5, and the moving contacts 5 correspond to the static contacts 4 respectively, and the static sheet component 2 and the short-circuit protection moving contact part Component 3 forms a DC circuit through the contact between the static contact 4 and the moving contact 5, a solenoid valve component 6 is fixedly provided in the lower space, a moving iron core 62 in the solenoid valve component 6 is connected to a push rod 63, and the push rod 63 is connected to the short-circuit protection moving contact component 3, and the movable distance of the moving iron core 62 is greater than the distance that the short-circuit protection moving contact component 3 moves up and down in the upper space so that the moving contact 5 touches the static contact 4, a control board 7 is provided in the shell, the solenoid valve component 6 is connected to the control board 7, a socket is provided on the outside of the shell, and the control board 7 is connected to the control center through the socket.

[0034] When the automobile is started normally, the utility model supplies power to the solenoid valve through the control board 7. When there is a positive voltage, the moving iron core 62 of the solenoid valve moves with the magnetic field, and under the action of the magnetic field, the short-circuit protection moving contact component 3 is attracted to the direction of the solenoid valve, so that the static contact 4 and the moving contact 5 are in contact, forming a circuit, and the power supply and motor and other electrical loads connected to the two static sheet components 2 are energized. On the contrary, when the automobile is turned off, the motor is naturally powered off. When the vehicle is in an abnormal state, such as a car accident or other serious abnormal state, the control center judges the danger level and sends a command to the control board 7 when necessary. The control board 7 supplies a reverse voltage to the solenoid valve, and repels the short-circuit protection moving contact component 3 in the opposite direction of the solenoid valve, so that the static contact 4 and the moving contact 5 are separated, the circuit is disconnected, and the power supply and motor and other electrical loads are also disconnected. When a short circuit occurs, the short-circuit protection moving contact component 3 responds in time, disconnects the circuit, and disconnects the power supply and the motor. When the car encounters an emergency, the control panel 7 can give the electromagnetic valve a reverse voltage through the command of the car control center, so that the static contact 4 and the moving contact 5 are separated, the circuit is disconnected, and the power supply and the motor are also disconnected. The utility model can disconnect the power supply and the motor during the short circuit process and the car encounters an emergency, thereby improving driving safety.

[0035] The solenoid valve component 6 includes a coil frame 61, a coil, a moving iron core 62, a push rod 63, an armature cover 64, and a U-shaped yoke 65. The coil frame 61 is arranged in the U-shaped yoke 65. The U-shaped yoke 65 opens upward, and an armature cover 64 is arranged at the opening. The armature cover 64 is provided with an opening adapted to the size of the push rod 63. The moving iron core 62 is larger than the opening of the armature cover 64. The coil frame 61 is a hollow structure, and the moving iron core 62 moves up and down in the hollow structure. The outer periphery of the coil frame 61 is wrapped with a coil, and the coil pins of the coil are connected to the control board 7. A group of magnetic holding permanent magnets 66 are arranged on the left and right sides of the middle of the coil frame 61, and the magnetic holding permanent magnets 66 are opposite to each other with the same poles. Ordinary solenoid valves need to be constantly supplied with voltage, the positive voltage is attracted, and the reverse voltage is released. The voltage also needs to be kept during the attraction process, which consumes a lot of power. After the magnetic holding permanent magnet 66 is set, when the coil is energized to generate a magnetic field, the magnetic holding permanent magnet 66 with the same poles facing each other generates a magnetic field loop to attract the moving iron core 62. The control board 7 can increase the voltage to the coil at the beginning. When the magnetic holding permanent magnet 66 generates a magnetic field loop, the current to the coil can be reduced. The control board 7 can intelligently reduce energy consumption to achieve the purpose of energy saving. Under the action of the two forces of the electromagnetic valve magnetic force and the magnetic holding permanent magnet 66, the moving iron core 62 is more stable and has greater anti-vibration ability, and will not be affected by the bumps of the vehicle.

[0036] The short-circuit protection moving contact component 3 is a bridge-type moving contact component, including a bridge-type fixing block 31, a C-type bridge-type moving piece 32, a small moving contact 51, a large moving contact 52, an arc-striking piece 33, an arc-extinguishing chamber 34, a compression spring piece 35 and a clamp 36. The upper part of the bridge-type fixing block 31 is provided with a groove adapted to the shape of the C-type bridge-type moving piece 32. The C-type bridge-type moving piece 32 is arranged in the bridge-type fixing block 31 and is fixed by the compression spring piece 35 and the clamp 36. The C-type opening is located above the static piece component 2 on one side. Two small moving contacts 51 and one large moving contact 52 are respectively arranged on both sides below the C-type opening of the C-type bridge-type moving piece 32 and on the corresponding other side. The small moving contact 51 and the large moving contact 52 correspond to the static contact 4 on the static piece component 2 respectively. The movable rod 63 is connected to the bridge-type fixed block 31 through a tripping device, and the tripping device includes a tripping rotating rod 8, a tripping compression spring 9 and a tripping member 10. A groove is provided at the upper end of the push rod 63, and a tripping rotating rod 8 is provided in the groove through a rotating shaft. The tripping rotating rod 8 is provided with the tripping compression spring 9, and the other side of the tripping compression spring 9 is against the inner wall of the groove. The tripping rotating rod 8 is provided with a protrusion on the side away from the tripping compression spring 9. The bridge-type fixed block 31 is provided with an opening corresponding to the tripping rotating rod 8, and an arc-shaped protrusion is provided at the protrusion of the tripping rotating rod 8 at the side wall of the opening corresponding to the protrusion of the tripping rotating rod 8. The tripping member 10 is provided at both ends of the opening of the C-shaped bridge movable plate 32, and an inwardly bent hook is provided at the end of the tripping member 10, and the hook of the tripping member 10 is clamped at the end protrusion of the tripping rotating rod 8. The side walls at the bending points at both ends of the C-type bridge movable piece 32 are thinner than the thickness of other side walls. The C-type bridge movable piece 32 is provided with four arc-striking pieces 33 extending outward. The inner ends of the arc-striking pieces 33 are connected to the left and right outer sides of the two small moving contacts 51 and the large moving contacts 52. A group of arc-extinguishing chambers 34 are respectively provided on the upper surface of the static piece component 2. The arc-striking pieces 33 extend into the arc-extinguishing chambers 34. The height of the arc-extinguishing chambers 34 is greater than or equal to the upper and lower movable height of the arc-striking pieces 33. An elastic device 11 is provided between the push rod 63 and the bridge-type fixed block 31.

[0037] Under normal conditions, the push rod 63 is connected to the bridge-type fixed block 31 through a tripping device. When the solenoid valve is connected to positive and reverse voltages, the push rod 63 and the bridge-type fixed block 31 move up and down together, thereby driving the C-type bridge moving piece 32, so that the static contact 4 and the moving contact 5 contact or separate, thereby achieving the principle and function of the contactor.

[0038] When a short circuit occurs, the current of the C-type bridge movable plate 32 is too large, generating a magnetic field. Due to the shape characteristics of the C-type bridge movable plate 32, a repulsive force is generated at the opening and the corresponding other side. Since the C-type bridge movable plate 32 has an opening and the side walls at the two ends of the bending are thin, the opening can form a slight deformation and will deform outward. The C-type bridge movable plate 32 drives the release member 10, and the hook of the release member 10 pulls the release rotating rod 8 outward, so that the protrusion of the release rotating rod 8 cannot hold the bridge fixed block 31. Under the action of the elastic device 11, the push rod 63 and the bridge fixed block 31 are instantly opened, so that the moving contact 5 and the static contact 4 are separated, playing a short circuit protection role, thereby achieving the principle and function of the relay.

[0039] After the circuit is restored, when the controller gives the solenoid valve a positive voltage, the short-circuit protection moving contact component 3 approaches the solenoid valve under the action of the electromagnetic, and at the same time the moving iron core 62 drives the push rod 63 to move. When the release rotating rod 8 moves up, it is guided by the arc-shaped protrusion of the bridge fixing block 31 and finally gets stuck to the bridge fixing block 31. The elastic device 11 is compressed, completing the reset and forming a whole.

[0040] The utility model does not need to be sent to a maintenance site for repair like a broken fuse, can be reused, does not need to replace the equipment, and avoids the trouble of maintenance for the car owner.

[0041] A manganese copper shunt 12 and a static connecting piece 13 are installed at the outer end of one of the static sheet components 2. The manganese copper shunt 12 is connected to the control board 7, and the static connecting piece 13 extends to the outside of the shell. The manganese copper shunt 12 is arranged in multiple layers. The manganese copper shunt 12 can collect the current size, and make a judgment based on the current threshold set in advance through the calculation of the control board 7. When the circuit is overloaded, the control board 7 will give the solenoid valve a reverse current, and the circuit will be disconnected within the set time to achieve overload protection. It is a self-triggering device that can sense the current peak and cut off the circuit based on external triggering to improve safety and reliability. The manganese copper shunt 12 adopts a multi-layer setting, which can collect current and dissipate heat more effectively.

[0042] The housing comprises a large base 14, a base cover 15, an upper cover 16 and a side cover 17. The large base 14 and the base cover 15 can be combined into one by fasteners to form two upper and lower spaces. The control panel 7 is arranged on the outside of the large base 14. The side cover 17 is covered on the large base 14 by screws of the side cover 17. The upper cover 16 is connected to the large base 14 and the base cover 15 by fasteners. In order to facilitate assembly, the housing of the utility model is divided into several parts.

[0043] The upper cover 16 is T-shaped, the large base 14 and the base cover 15 are provided with grooves adapted to the convex shape of the upper cover 16, the convex part of the upper cover 16 covers the solenoid valve component 6, a group of magnetic blowing permanent magnets 18 are relatively provided on the inner side wall of the convex part of the upper cover 16, and a group of limiting compression springs 1 are provided on the inner side wall of the bottom of the upper cover 16, and the limiting compression springs 1 correspond to the short-circuit protection moving contact component 3. The magnetic blowing permanent magnets 18 correspond to the front and rear sides of the short-circuit protection moving contact component 3 to play an arc extinguishing role. The utility model is a DC circuit. The biggest problem of DC is arcing and arc extinguishing. In order to resist arcing, three arc extinguishing designs are adopted. One is to increase the contact gap between the moving contact 52 and the static contact 4, the second is to use the arc extinguishing chamber 34 to extinguish the arc, and the third is to rely on the magnetic blowing permanent magnets 18 to blow the arc, which improves the product life.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A DC high-breakage intelligent circuit breaker for electric vehicles, comprising a housing, characterized in that: The shell is divided into two spaces, an upper space and an lower space. A group of static sheet components (2) and a short-circuit protection moving contact component (3) are arranged in the upper space. The static sheet components (2) are fixedly installed in the shell without contacting each other. One end of each static sheet component (2) passes through the shell to the outside, and a static contact (4) is arranged on the upper surface of the other end. The short-circuit protection moving contact component (3) is located at the upper end of the static sheet component (2). A group of moving contacts (5) are arranged on the lower surface of the short-circuit protection moving contact component (3). The moving contacts (5) correspond to the static contacts (4) respectively. The static sheet component (2) and the short-circuit protection moving contact component (3) are connected to each other through the static contacts (4) and the static contacts (4). The contact of the moving contact (5) forms a DC circuit. An electromagnetic valve component (6) is fixedly arranged in the lower space. The moving iron core (62) in the electromagnetic valve component (6) is connected to a push rod (63). The push rod (63) is connected to the short-circuit protection moving contact component (3). The movable distance of the moving iron core (62) is greater than or equal to the distance that the short-circuit protection moving contact component (3) moves up and down in the upper space so that the moving contact (5) touches the static contact (4). A control board (7) is arranged in the shell. The electromagnetic valve component (6) is connected to the control board (7). The control board (7) is connected to a control center.

2. A DC high-breakage intelligent circuit breaker for electric vehicles according to claim 1, characterized in that: The solenoid valve component (6) comprises a coil frame (61), a coil, a moving iron core (62), a push rod (63), an armature cover (64), and a U-shaped yoke (65). The coil frame (61) is arranged in the U-shaped yoke (65). The U-shaped yoke (65) opens upward, and an armature cover (64) is arranged at the opening. The armature cover (64) is provided with an opening adapted to the size of the push rod (63). The moving iron core (62) is larger than the opening of the armature cover (64). The coil frame (61) is a hollow structure. The moving iron core (62) moves up and down in the hollow structure. A coil is wound around the outer periphery of the coil frame (61), and the coil pins of the coil are connected to the control board (7).

3. A DC high-breakage intelligent circuit breaker for electric vehicles according to claim 2, characterized in that: The electromagnetic valve component (6) is a magnetically latching electromagnetic valve. A group of magnetically latching permanent magnets (66) are disposed opposite to each other on the left and right sides of the middle of the coil frame (61). The magnetically latching permanent magnets (66) are opposite to each other with the same poles.

4. A DC high-breakage intelligent circuit breaker for electric vehicles according to claim 1, characterized in that: The short-circuit protection moving contact component (3) is a bridge-type moving contact component, comprising a bridge-type fixing block (31), a C-type bridge-type moving piece (32), a small moving contact (51), a large moving contact (52), an arc-starting piece (33), an arc-extinguishing chamber (34), a compression spring piece (35) and a clamp (36); the upper part of the bridge-type fixing block (31) is provided with a groove adapted to the shape of the C-type bridge-type moving piece (32); the C-type bridge-type moving piece (32) is arranged in the bridge-type fixing block (31) and is fixed by the compression spring piece (35) and the clamp (36); the opening of the C-type bridge-type moving piece (32) is located above one side of the static piece component (2); two small moving contacts (51) and one large moving contact (52) are respectively provided on both sides below the C-type opening of the C-type bridge-type moving piece (32) and on the other side corresponding to the other side; the small moving contact (51) and the C-type moving contact (32) are provided at the same time; The large moving contacts (52) correspond to the static contacts (4) on the static sheet component (2), respectively; the push rod (63) is connected to the bridge-type fixed block (31) through a release device; the side walls at the two ends of the C-type bridge-type moving piece (32) are thinner than the thickness of other side walls; the C-type bridge-type moving piece (32) is provided with four arc-striking pieces (33) extending outward; the inner ends of the arc-striking pieces (33) are connected to the left and right outer sides of the two small moving contacts (51) and the large moving contact (52); a group of arc-extinguishing chambers (34) are respectively provided on the upper surface of the static sheet component (2); the arc-striking pieces (33) extend into the arc-striking chambers (34); the height of the arc-striking chambers (34) is greater than or equal to the upper and lower movable height of the arc-striking pieces (33); and an elastic device (11) is provided between the upper end of the push rod (63) and the bridge-type fixed block (31).

5. A DC high-breakage intelligent circuit breaker for electric vehicles according to claim 4, characterized in that: The release device comprises a release rotating rod (8), a release compression spring (9) and a release member (10); a groove is provided at the upper end of the push rod (63); a release rotating rod (8) is provided in the groove for rotation via a rotating shaft; the release rotating rod (8) is provided with the release compression spring (9); the other side of the release compression spring (9) abuts against the inner wall of the groove; the release rotating rod (8) is provided with a protrusion on the side opposite to the release compression spring (9); an opening is provided at the bridge-type fixing block (31) corresponding to the release rotating rod (8); an arc-shaped protrusion is provided at the protrusion of the release rotating rod (8) at the side wall of the opening corresponding to the protrusion of the release rotating rod (8); the release member (10) is provided at both ends of the opening of the C-type bridge-type moving plate (32); an inwardly bent hook is provided at the end of the release member (10); the hook of the release member (10) is clamped at the protrusion at the end of the release rotating rod (8).

6. A DC high-breakage intelligent circuit breaker for electric vehicles according to claim 1, characterized in that: A manganese copper shunt (12) and a static connecting piece (13) are installed at the outer end of one of the static sheet components (2); the manganese copper shunt (12) is connected to the control board (7); and the static connecting piece (13) extends outside the shell.

7. A DC high-breakage intelligent circuit breaker for electric vehicles according to claim 6, characterized in that: The manganese-copper shunt (12) is arranged in multiple layers.

8. A DC high-breakage intelligent circuit breaker for electric vehicles according to claim 1, characterized in that: The shell comprises a large base (14), a base cover (15), an upper cover (16) and a side cover (17); the large base (14) and the base cover (15) can be combined into one by fasteners to form two upper and lower spaces; the control panel (7) is arranged on the outside of the large base (14); the side cover (17) is covered on the large base (14) by screws of the side cover (17); and the upper cover (16) is connected to the large base (14) and the base cover (15) by fasteners.

9. A DC high-breakage intelligent circuit breaker for electric vehicles according to claim 8, characterized in that: The upper cover (16) is T-shaped, the large base (14) and the base cover (15) are provided with grooves adapted to the convex shape of the upper cover (16), the convex part of the upper cover (16) covers the solenoid valve component (6), a group of magnetically blown permanent magnets (18) are relatively provided on the inner side wall of the convex part of the upper cover (16), and a group of limiting compression springs (1) are provided on the inner side wall of the bottom of the upper cover (16), and the limiting compression springs (1) correspond to the short-circuit protection moving contact component (3).

10. A DC high-breakage intelligent circuit breaker for electric vehicles according to claim 1, characterized in that: A socket is provided on the outside of the shell, and the control panel (7) is connected to the control center via the socket.

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