CN114156127B - Contactor, charge-discharge loop and new energy automobile - Google Patents
Contactor, charge-discharge loop and new energy automobile Download PDFInfo
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- CN114156127B CN114156127B CN202111327273.3A CN202111327273A CN114156127B CN 114156127 B CN114156127 B CN 114156127B CN 202111327273 A CN202111327273 A CN 202111327273A CN 114156127 B CN114156127 B CN 114156127B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/54—Contact arrangements
- H01H50/541—Auxiliary contact devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/14—Terminal arrangements
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
- H02J7/00036—Charger exchanging data with battery
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Power Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The application provides a contactor, a charge-discharge loop and a new energy automobile, which relate to the field of piezoelectric devices, wherein the contactor comprises: the device comprises a static iron core, a movable iron core, a primary auxiliary contact, a secondary auxiliary contact and a main contact; the primary auxiliary contact and the secondary auxiliary contact are sequentially arranged between the main contact and the movable iron core; the main contact is connected with the movable iron core through a connecting piece; the static iron core comprises a coil, when the coil is electrified, the static iron core attracts and actuates the movable iron core to move, and the movable iron core drags the main contact to move through the connecting piece; the main contact is connected with the primary auxiliary contact when being dragged by the passive iron core; or the main contact is connected with the primary auxiliary contact when dragged by the passive iron core, and the primary auxiliary contact is connected with the secondary auxiliary contact. According to the contactor, the charge-discharge loop and the new energy automobile, which are provided by the application, one relay signal in the battery management system can be used for controlling, the system wiring is simpler, and the system arrangement space is released.
Description
Technical Field
The disclosure relates to the field of piezoelectric devices, and in particular relates to a contactor, a charge-discharge loop and a new energy automobile.
Background
Currently, dc contactors are widely used in battery charge and discharge circuits in battery systems. Because of the characteristics of the main loop circuit, a large impact current can be generated at the closing moment of the main loop, if the main loop is not protected, the direct current contactor in the main loop is easy to adhere to the main contact of the direct current contactor due to the impact current based on the characteristics of the direct current contactor.
In the prior art, the protection measure adopted is generally to connect a pre-charging loop in parallel with two ends of a main loop direct current contactor. The precharge circuit is composed of a precharge contactor and a precharge resistor.
However, this approach requires the battery management system to control the pre-charge contactor and the main loop contactor separately, is complicated in system wiring, and occupies a system layout space.
Disclosure of Invention
The application provides a contactor, a charge-discharge loop and a new energy automobile, which are used for solving the problems that a battery management system is required to control a pre-charge contactor and a main loop contactor respectively, the wiring of the system is complex, and the system arrangement space is occupied in the prior art.
According to a first aspect of the present application, there is provided a contactor comprising: the device comprises a static iron core, a movable iron core, a primary auxiliary contact, a secondary auxiliary contact and a main contact; the primary auxiliary contact and the secondary auxiliary contact are sequentially arranged between the main contact and the movable iron core; the main contact is connected with the movable iron core through a connecting piece; the static iron core comprises a coil, when the coil is electrified, the static iron core attracts the movable iron core to move, and the movable iron core drags the main contact to move through the connecting piece; the main contact is connected with the primary auxiliary contact when being dragged by the movable iron core; or the main contact is connected with the primary auxiliary contact when dragged by the movable iron core, and the primary auxiliary contact is connected with the secondary auxiliary contact.
In an embodiment of the present application, the material of the primary auxiliary contact is a material of a pre-charging resistor.
In one embodiment of the present application, the material of the secondary auxiliary contact is a conductive material.
In one embodiment of the application, when the voltage value loaded at two ends of the coil reaches a first voltage value and is smaller than a second voltage value, the static iron core attracts the movable iron core to move, and the movable iron core drags the main contact to move so as to connect the main contact with the primary auxiliary contact; when the voltage value loaded at two ends of the coil reaches a second voltage value, the static iron core attracts the movable iron core to move, the movable iron core drags the main contact to move so that the main contact is connected with the primary auxiliary contact, and the main contact pushes the primary auxiliary contact to move so that the primary auxiliary contact is connected with the secondary auxiliary contact.
In one embodiment of the application, the contactor further comprises a return spring; one end of the reset spring is fixed on the fixed object, and the other end of the reset spring is connected with the movable iron core; when the coil is energized, the plunger moves against the force of the return spring.
In one embodiment of the application, when the voltage value applied to the two ends of the coil becomes zero, the other end of the return spring drags the movable iron core to reset, and the main contact is dragged to an initial position by the movable iron core.
According to a second aspect of the present application, there is provided a charge-discharge circuit including a contactor; the contactor is controlled by a battery management system, so that the on-off of a charging and discharging loop is controlled; wherein the contactor is any of the contactors of the first aspect.
According to a third aspect of the present application, there is provided a new energy automobile comprising a charge-discharge circuit; the start or flameout of the new energy automobile is controlled by controlling the on or off of the charge-discharge loop; wherein the charge-discharge circuit is any one of the charge-discharge circuits described in the second aspect.
The application provides a contactor, comprising: the device comprises a static iron core, a movable iron core, a primary auxiliary contact, a secondary auxiliary contact and a main contact; the primary auxiliary contact and the secondary auxiliary contact are sequentially arranged between the main contact and the movable iron core; the main contact is connected with the movable iron core through a connecting piece; the static iron core comprises a coil, when the coil is electrified, the static iron core attracts and actuates the movable iron core to move, and the movable iron core drags the main contact to move through the connecting piece; the main contact is connected with the primary auxiliary contact when being dragged by the passive iron core; or the main contact is connected with the primary auxiliary contact when dragged by the passive iron core, and the primary auxiliary contact is connected with the secondary auxiliary contact. The contactor provided by the application is provided with the primary auxiliary contact and the secondary auxiliary contact, can be controlled by one relay signal in the battery management system, has simpler system wiring, and releases the system arrangement space.
The application provides a charge-discharge loop, which comprises any contactor. When the charging and discharging loop works, the on-off of the charging and discharging loop can be controlled through one relay signal in the battery management system, the system wiring is simpler, and the system arrangement space is released.
The application provides a new energy automobile, which comprises any one of the charge-discharge loops. The starting and flameout of the new energy automobile can be controlled through one relay signal in the battery management system, the system wiring is simpler, and the system arrangement space is released.
Drawings
Fig. 1 is a schematic circuit diagram of a main loop contactor with a precharge loop according to an exemplary embodiment of the present application;
fig. 2 is a schematic view of a structure of a single-contact contactor according to an exemplary embodiment of the present application;
fig. 3 is a schematic view showing a structure of a contactor according to an exemplary embodiment of the present application;
fig. 4 is a schematic circuit diagram of a contactor according to an exemplary embodiment of the present application;
fig. 5 is a schematic view showing a structure of a contactor according to another exemplary embodiment of the present application.
Detailed Description
Dc contactors are widely used in battery charge and discharge circuits in battery systems. Because of the characteristics of the main loop circuit, a large impact current can be generated at the closing moment of the main loop, if the main loop is not protected, the direct current contactor in the main loop is easy to adhere to the main contact of the direct current contactor due to the impact current based on the characteristics of the direct current contactor. At present, protection measures are generally adopted, namely a pre-charging loop is connected in parallel at two ends of a direct current contactor of a main loop. The precharge circuit is composed of a precharge contactor and a precharge resistor.
However, this approach requires the battery management system to control the pre-charge contactor and the dc main loop contactor separately, the system wiring is complex, and the system layout space is occupied.
In order to solve the technical problems, the scheme provided by the application comprises a contactor, wherein a primary auxiliary contact and a secondary auxiliary contact are arranged, the closing mode of the contactor can be controlled through a contactor signal in a battery management system, the system wiring is simpler, and the system arrangement space is released.
Fig. 1 is a schematic circuit diagram of a main loop contactor with a precharge loop according to an exemplary embodiment of the present application.
Currently, dc contactors are widely used in battery charge and discharge circuits in battery systems. Because of the characteristics of the main loop circuit, a large impact current can be generated at the closing moment of the main loop, if the main loop is not protected, the direct current contactor in the main loop is easy to adhere to the main contact of the direct current contactor due to the impact current based on the characteristics of the direct current contactor. The contactors involved in the application are all direct current contactors.
As shown in fig. 1, in the prior art, a protection measure is generally to connect a pre-charging loop in parallel to two ends of a main loop contactor. The precharge circuit is composed of a precharge contactor and a precharge resistor. Wherein the main circuit contactor and the pre-charge contactor may be the same contactor.
This solution requires the battery management system to control the pre-charge contactor and the main loop contactor, respectively. The system wiring is complex and occupies system layout space. As shown in fig. 1, the battery management system requires two relay signals, relay0+ and relay1+, to control the main loop contactor and the pre-charge contactor, respectively. The battery management system firstly controls the pre-charging contactor to be closed through a relay1+ signal, and the impact current generated by the main loop is released through the pre-charging loop, so that the main loop contactor is protected. Then, the battery management system controls the main loop contactor to be closed through a relay0+ signal, and then the battery management system controls the pre-charging loop to be opened through the relay1+ signal.
Fig. 2 is a schematic structural view of a single-contact contactor according to an exemplary embodiment of the present application.
The main circuit contactor and the pre-charge contactor of fig. 1 may be the same contactor, as shown in fig. 2, illustrated in one type of contactor configuration common in the art. The contactor comprises a static iron core 1, a movable iron core 3, a movable contact 4 and a static contact 5. Wherein the stationary contact 5 is disposed between the movable contact 4 and the movable core 3. The movable contact 4 and the movable iron core 3 are connected through a connecting piece 7. The contactor comprises a return spring 6, one end of the return spring 6 is fixed on a fixed physical body, and the other end of the return spring is connected with the movable iron core 3. When the coil 2 is energized, the plunger 3 moves against the force of the return spring 6.
The contactor has only one stationary contact except the movable contact, and is therefore called a single-contact contactor.
Specifically, the static iron core 1 includes a coil 2, when the voltage value loaded at two ends of the coil 2 reaches a third voltage value, electromagnetic attraction force is generated in the static iron core 1, the electromagnetic attraction force in the static iron core 1 can attract the movable iron core 3 to move towards the static iron core 1 against the spring force of the return spring 6, and the movable iron core 3 drags the movable contact 4 to move through the connecting piece 7. The movable contact 4 is dragged by the movable iron core 3 to be connected with the stationary contact 5.
When the voltage value loaded at the two ends of the coil 2 is zero, no electromagnetic attraction exists in the static iron core 1, one end, connected with the movable iron core 3, of the return spring 6 drags the movable iron core 3 to reset, and the movable contact 4 is dragged to an initial position by the movable iron core 3 through the connecting piece 7.
Fig. 3 is a schematic view showing a structure of a contactor according to an exemplary embodiment of the present application.
As shown in fig. 3, the contactor provided by the present application includes: the device comprises a static iron core 1, a movable iron core 2, a primary auxiliary contact 3, a secondary auxiliary contact 4 and a main contact 5.
Wherein, the primary auxiliary contact 3 and the secondary auxiliary contact 4 are sequentially arranged between the main contact 5 and the movable iron core 2.
Specifically, the primary auxiliary contact 3 and the secondary auxiliary contact 4 can move between the main contact 5 and the movable core 2 under the action of external force. For example, when the movable contact 5 moves in the direction of the primary auxiliary contact 3, the movable contact 5 and the primary auxiliary contact 3 can be contacted, and when the movable contact 5 continues to move in the direction of the primary auxiliary contact 3, the primary auxiliary contact 3 can be contacted with the secondary auxiliary contact 4.
The main contact 5 is connected with the movable iron core 2 through a connecting piece 6. The static iron core 1 comprises a coil 7, when the coil 7 is electrified, the static iron core 1 attracts the movable iron core 2 to move, and the movable iron core 2 drags the main contact 5 to move through the connecting piece 6. The main contact 5 is connected with the primary auxiliary contact 3 when being dragged by the passive iron core 2; or the main contact 5 is connected with the primary auxiliary contact 3 when being dragged by the passive iron core 2, and the primary auxiliary contact 3 is connected with the secondary auxiliary contact 4.
Specifically, when the coil 7 in the stationary core 1 is charged, electromagnetic attraction force is generated in the stationary core 1, so that the electromagnetic attraction force in the stationary core 1 attracts the movable core 2 toward the stationary core 1. Since the movable iron core 2 is connected to the movable contact 5 through the connecting member 6, the movable iron core 2 moves to drag the contact 5 through the connecting member 6 toward the stationary iron core 1.
When the voltage in the coil 7 in the static iron core 1 is loaded to a certain voltage value, the static iron core 1 attracts the movable iron core 2, and the movable iron core 2 drags the main contact 5 to generate certain displacement, so that the main contact 5 is connected with the primary auxiliary contact 3, and if the electromagnetic attraction force at the moment is insufficient to enable the movable contact 5 to continue to move, the primary auxiliary contact 3 is not connected with the secondary auxiliary contact 4. In this case, the contactor can be considered to be in a first-order suction state. When the contactor is used, the movable contact 5 and the primary auxiliary contact 3 can be connected into a circuit, and when the contactor is in a primary suction state, the movable contact 5 and the primary auxiliary contact 3 are contacted, so that the positions provided with the movable contact 5 and the primary auxiliary contact 3 in the circuit are closed.
Preferably, the first auxiliary contact 3 is made of a pre-charge resistive material, so that the resistance value is as large as possible.
When the voltage in the coil 7 in the static iron core 1 is pressurized again and reaches a certain value, the static iron core 1 attracts the movable iron core 2, and the movable iron core 2 drags the main contact 5 to generate, the main contact 5 drives the primary auxiliary contact 3 to generate certain displacement, so that the main contact 5 is connected with the primary auxiliary contact 3, and the primary auxiliary contact 3 is connected with the secondary auxiliary contact 4, namely, the main contact 5, the primary auxiliary contact 3 and the secondary auxiliary contact 4 are communicated.
The application provides a contactor which comprises a static iron core, a movable iron core, a primary auxiliary contact, a secondary auxiliary contact and a main contact, wherein the static iron core is connected with the movable iron core; the primary auxiliary contact and the secondary auxiliary contact are sequentially arranged between the main contact and the movable iron core; the main contact is connected with the movable iron core through a connecting piece; the static iron core comprises a coil, when the coil is electrified, the static iron core attracts and actuates the movable iron core to move, and the movable iron core drags the main contact to move through the connecting piece; the main contact is connected with the primary auxiliary contact when being dragged by the passive iron core; or the main contact is connected with the primary auxiliary contact when dragged by the passive iron core, and the primary auxiliary contact is connected with the secondary auxiliary contact. The contactor provided by the application is provided with the primary auxiliary contact and the secondary auxiliary contact, can be controlled by one relay signal in the battery management system, has simpler system wiring, and releases the system arrangement space. Fig. 4 is a schematic circuit diagram of a contactor according to an exemplary embodiment of the present application.
As shown in fig. 4, a schematic circuit diagram of the contactor shown in fig. 3 when used in a main circuit is shown.
Wherein K1 closing means that the movable contact 5 and the primary auxiliary contact 3 in fig. 3 are in contact. R is the resistance of K1, representing the resistance of the primary auxiliary contact 3 in fig. 3. K2 closed means that the primary auxiliary contact 3 and the secondary auxiliary contact 4 in fig. 3 are in contact. K1 and K2 are closed to indicate that the movable contact 5, the primary auxiliary contact 3 and the secondary auxiliary contact 4 in fig. 3 are communicated.
The battery management system only needs one relay2+ signal to control the contactor. When the voltage value of the relay < 2+ > load reaches the first voltage value and is smaller than the second voltage value, K1 is closed, and K2 is in an open state. In this state, the impact current generated by the main circuit is released through the K1 circuit, thereby protecting the K2 contact, i.e., the secondary auxiliary contact 4 in fig. 3.
When the voltage value of the relay2+ load reaches the second voltage value, both K1 and K2 are closed. In the design of the K1 contact, the contact resistance R is as large as possible, i.e. the resistance of the primary auxiliary contact 3 in fig. 3 is as large as possible. The K1 loop is small in shunt, and when K1 and K2 are both closed, the K1 loop is small in shunt and is equivalent to open circuit, so that energy is saved, and normal operation of the K2 main loop is not affected.
Compared with the prior art, the contactor in the embodiment only needs one relay signal of the battery management system to control, has simple system wiring, and releases the system arrangement space.
Fig. 5 is a schematic view showing a structure of a contactor according to another exemplary embodiment of the present application.
As shown in fig. 5, the contactor provided by the present application includes: the device comprises a static iron core 1, a movable iron core 2, a primary auxiliary contact 3, a secondary auxiliary contact 4 and a main contact 5; the primary auxiliary contact 3 and the secondary auxiliary contact 4 are sequentially arranged between the main contact 5 and the movable iron core 2. The static iron core 1 comprises a coil 7, when the coil 7 is electrified, the static iron core 1 attracts the movable iron core 2 to move, and the movable iron core 2 drags the main contact 5 to move through the connecting piece 6. The main contact 5 is connected with the primary auxiliary contact 3 when being dragged by the passive iron core 2; or the main contact 5 is connected with the primary auxiliary contact 3 when being dragged by the passive iron core 2, and the primary auxiliary contact 3 is connected with the secondary auxiliary contact 4.
Preferably, the primary auxiliary contact 3 is made of a pre-charging resistor, wherein the pre-charging resistor can be made of ceramics, aluminum alloy or other alternative materials. The primary auxiliary contact 3 is not required in terms of structure and size, and is specifically determined according to the precharge resistance parameter that it serves as, i.e., the precharge resistance value and the power requirement.
Preferably, the material of the secondary auxiliary contact 4 is a conductor material. Preferably, the main contact 5 may be made of a conductive material. The materials of the secondary auxiliary contact 4 and the main contact 5 can be copper-silver alloy or other materials with strong electric conductivity.
Preferably, the contact 10 can be arranged on the mutual contact surfaces of the primary auxiliary contact 3, the secondary auxiliary contact 4 and the main contact 5, so that the primary auxiliary contact 3, the secondary auxiliary contact 4 and the main contact 5 can be conveniently connected with each other. The contact can be made of a conductor material, such as copper-silver alloy or other materials with high conductivity.
Specifically, when the voltage value loaded at two ends of the coil 7 reaches the first voltage value and is smaller than the second voltage value, the static iron core 1 attracts the movable iron core 2 to move, and the movable iron core 2 drags the main contact 5 to move, so that the main contact 5 is connected with the primary auxiliary contact 3; when the voltage value loaded at the two ends of the coil 7 reaches the second voltage value, the static iron core 1 attracts the movable iron core 2 to move, the movable iron core 2 drags the main contact 5 to move so that the main contact 5 is connected with the primary auxiliary contact 3, and the main contact 5 pushes the primary auxiliary contact 3 to move so that the primary auxiliary contact 3 is connected with the secondary auxiliary contact 4.
Wherein, the contactor provided by the application further comprises a return spring 8; one end of a reset spring 8 is fixed on a fixed object, and the other end is connected with the movable iron core 2; when the coil 7 is energized, the plunger 2 moves against the force of the return spring 8.
The first voltage value and the second voltage value can be obtained through calculation. Specifically, when a voltage is applied across the coil 7, electromagnetic attraction force is generated in the stationary core 1, specifically, electromagnetic attraction force is generated in the electromagnetic chamber 9. So that the electromagnetic attraction force in the stationary core 1 attracts the movable core 2 against the force of the return spring 8 toward the stationary core 1. The moving iron core 2 will drag the contact 5 through the connecting piece 6 to move towards the static iron core 1.
Specifically, the coil 7 is energized, and the formula of the electromagnetic attraction force generated is as follows:
F2＝NI＝NU/R
wherein N is the number of turns of the coil 7, I is the energizing current, U is the voltage applied to the coil 7, and R is the resistance of the coil 7.
The electromagnetic attraction attracts the movable iron core 2, so that analysis is simplified, the electromagnetic attraction acting on the movable iron core is regarded as F2, the electromagnetic attraction overcomes the spring force to drive the movable contact 5 to displace until the stress is balanced, and the formula is as follows:
F2＝F1＝kx
where k is the spring constant of the return spring 8, x is the displacement of the movable contact 5, i.e. the deformation of the return spring 8, and F1 is the spring force of the return spring 8.
Thus, it can be seen that x=nu/(Rk) =ku, where k=n/Rk, i.e., the displacement x of the movable contact 5 is proportional to the applied voltage of the coil 7.
When the voltages U are applied to the two ends of the coil 7, the displacements x of the movable contact 5 are different, and by utilizing this characteristic, the movable contact 5 is brought into contact with the primary auxiliary contact 3 and the secondary auxiliary contact 4, respectively, by applying the different voltages.
The first voltage value may be calculated as 12V, for example. When a voltage 12V is applied, the displacement x=x of the movable contact 5 1 . At this time, the movable contact 5 is just connected to the primary auxiliary contact 3 and disconnected from the secondary auxiliary contact 4, whichSometimes referred to as a primary connection state. The coil 7 continues to be pressurized at both ends, for example, the second voltage value may be 24V, and when 24V is applied, the displacement x= (x) of the movable contact 5 1 +x 2 ). At this time, the movable contact 5 is just connected to the primary auxiliary contact 3 and the secondary auxiliary contact 4, respectively, and is called a secondary connection state at this time.
When the contactor is in the primary connection state, the impact current generated by the system is released through the primary auxiliary contact 3 loop, thereby protecting the secondary auxiliary contact 4.
When the contactor is in a secondary connection state, the primary auxiliary contact 3, the secondary auxiliary contact 4 and the main contact 5 are connected in parallel in the main loop, and in the design of the primary auxiliary contact 3, the resistance value of the primary auxiliary contact is made to be as large as possible, so that the primary auxiliary contact 3 has small shunt in the loop, equivalent to open circuit, and does not influence the work of the main loop in the normal working process of the main loop.
Further, when the voltage value loaded at the two ends of the coil 7 becomes zero, the other end of the return spring 8 drags the movable iron core 2 to reset, and the main contact 5 is dragged to the initial position by the movable iron core 2.
Specifically, when the voltage values applied to both coils 7 become zero, there is no electromagnetic attraction force to the movable core 2 in the stationary core 1. The return spring 8 resets, and the one end that the return spring 8 links to each other with moving iron core 2 drags moving iron core 2 to reset to moving iron core 2 drags main contact 5 to initial position through connecting piece 6. In this process, the main contact 5 is disconnected from the secondary auxiliary contact 4 and the primary auxiliary contact 3, respectively.
Alternatively, the secondary auxiliary contact 4 may be fixed to a stationary object.
Alternatively, as shown in fig. 2, the contactor may further include a return spring 11, one end of the return spring 11 is fixed to the fixed object, and the other end is connected to the primary auxiliary contact 3. The spring force of the return spring 11 needs to be overcome also when the primary auxiliary contact 3 is pushed by the main contact 5. When the main contact 5 is reset, the end of the return spring 11 connected with the primary auxiliary contact 3 drags the primary auxiliary contact 3 to reset.
On the other hand, the application also provides a charge-discharge loop, which comprises a contactor, wherein the contactor is controlled by a battery management system so as to control the on-off of the charge-discharge loop; wherein the contactor is any one of the above contactors.
Specifically, according to the charge-discharge loop provided by the application, the voltage loaded at the two ends of the coil 7 is controlled by the battery management system to control the contactor, so that the on-off of the charge-discharge loop is controlled. Wherein the contactor is any one of the above contactors.
Specifically, when the voltage value loaded at two ends of the coil 7 reaches the first voltage value and is smaller than the second voltage value, the static iron core 1 attracts the movable iron core 2 to move, and the movable iron core 2 drags the main contact 5 to move through the connecting piece 6, so that the main contact 5 is connected with the primary auxiliary contact 3, and the contactor is in a primary connection state. Since the primary auxiliary contact 3 is made of pre-charge resistive material, the impact current generated by the system can be released through the loop of the primary auxiliary contact 3, thereby protecting the secondary auxiliary contact 4.
When the voltage value loaded at the two ends of the coil 7 reaches the second voltage value, the static iron core 1 attracts the movable iron core 2 to move, the movable iron core 2 drags the main contact 5 to move so that the main contact 5 is connected with the primary auxiliary contact 3, and the main contact 5 pushes the primary auxiliary contact 3 to move so that the primary auxiliary contact 3 is connected with the secondary auxiliary contact 4, so that the contactor is in a secondary connection state, and at the moment, the main circuit is connected and starts to work normally.
When the voltage value applied to both ends of the coil 7 is zero, the static iron core 1 does not generate electromagnetic attraction force, and in one implementation, the movable iron core 2 can drag the main contact 5 to reset through the reset spring 8, so that the main loop is disconnected.
In still another aspect, the application further provides a new energy automobile, which comprises a charging and discharging loop. The new energy automobile is controlled to start or flameout by controlling the on or off of the charging and discharging loop. Wherein the charge-discharge circuit is any one of the charge-discharge circuits described above.
Specifically, the charging and discharging loop is controlled to be connected, and the starting of the new energy automobile is controlled; and the new energy automobile is controlled to flameout by controlling the charge and discharge loop to be disconnected.
Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.
It is to be understood that the application is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the application is limited only by the appended claims.
Claims (7)
1. A contactor, comprising:
the device comprises a static iron core, a movable iron core, a primary auxiliary contact, a secondary auxiliary contact and a main contact;
the primary auxiliary contact and the secondary auxiliary contact are sequentially arranged between the main contact and the movable iron core;
the main contact is connected with the movable iron core through a connecting piece;
the static iron core comprises a coil, when the coil is electrified, the static iron core attracts the movable iron core to move, and the movable iron core drags the main contact to move through the connecting piece;
when the voltage value loaded at the two ends of the coil reaches a first voltage value and is smaller than a second voltage value, the static iron core attracts the movable iron core to move, and the movable iron core drags the main contact to move so that the main contact is connected with the primary auxiliary contact;
when the voltage value loaded at two ends of the coil reaches a second voltage value, the static iron core attracts the movable iron core to move, the movable iron core drags the main contact to move so that the main contact is connected with the primary auxiliary contact, and the main contact pushes the primary auxiliary contact to move so that the primary auxiliary contact is connected with the secondary auxiliary contact.
2. The contactor of claim 1, wherein said primary auxiliary contacts are of a pre-charge resistor material.
3. The contactor according to claim 1, wherein the secondary auxiliary contacts are made of a conductive material.
4. The contactor according to claim 1, further comprising a return spring;
one end of the reset spring is fixed on the fixed object, and the other end of the reset spring is connected with the movable iron core; when the coil is energized, the plunger moves against the force of the return spring.
5. The contactor according to claim 4, wherein the contact is provided with a contact hole,
when the voltage value loaded at the two ends of the coil becomes zero, the other end of the reset spring drags the movable iron core to reset, and the main contact is dragged to an initial position by the movable iron core.
6. The charging and discharging loop is characterized by comprising a contactor;
the contactor is controlled by a battery management system, so that the on-off of a charging and discharging loop is controlled; wherein the contactor is the contactor of any one of claims 1-5.
7. The new energy automobile is characterized by comprising a charging and discharging loop;
the start or flameout of the new energy automobile is controlled by controlling the on or off of the charge-discharge loop; wherein the charge-discharge circuit is the charge-discharge circuit described in claim 6.
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| CN202111327273.3A CN114156127B (en) | 2021-11-10 | 2021-11-10 | Contactor, charge-discharge loop and new energy automobile |
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| CN202111327273.3A CN114156127B (en) | 2021-11-10 | 2021-11-10 | Contactor, charge-discharge loop and new energy automobile |
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| CN114156127B true CN114156127B (en) | 2023-08-15 |
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| JP2009158159A (en) * | 2007-12-25 | 2009-07-16 | Gs Yuasa Corporation | Electromagnetic coil driving circuit of electromagnetic contactor |
| CN104409283A (en) * | 2014-12-16 | 2015-03-11 | 新余钢铁集团有限公司 | Electromagnetic contactor |
| CN111128607A (en) * | 2020-01-09 | 2020-05-08 | 嘉兴赛铁龙电气有限公司 | Electromagnetic contactor for electric locomotive |
| WO2021106673A1 (en) * | 2019-11-29 | 2021-06-03 | パナソニックＩｐマネジメント株式会社 | Electromagnetic relay |
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| CN208938885U (en) * | 2018-10-12 | 2019-06-04 | 伊顿电气有限公司 | Contactor |
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| JP2009158159A (en) * | 2007-12-25 | 2009-07-16 | Gs Yuasa Corporation | Electromagnetic coil driving circuit of electromagnetic contactor |
| CN104409283A (en) * | 2014-12-16 | 2015-03-11 | 新余钢铁集团有限公司 | Electromagnetic contactor |
| WO2021106673A1 (en) * | 2019-11-29 | 2021-06-03 | パナソニックＩｐマネジメント株式会社 | Electromagnetic relay |
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