CN114156127A - Contactor, charge-discharge circuit and new energy automobile - Google Patents

Contactor, charge-discharge circuit and new energy automobile Download PDF

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Publication number
CN114156127A
CN114156127A CN202111327273.3A CN202111327273A CN114156127A CN 114156127 A CN114156127 A CN 114156127A CN 202111327273 A CN202111327273 A CN 202111327273A CN 114156127 A CN114156127 A CN 114156127A
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China
Prior art keywords
iron core
contact
auxiliary contact
contactor
movable iron
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Granted
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CN202111327273.3A
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Chinese (zh)
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CN114156127B (en
Inventor
李想
赵庆斌
吕喆
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Beijing Hyperstrong Technology Co Ltd
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Beijing Hyperstrong Technology Co Ltd
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Priority to CN202111327273.3A priority Critical patent/CN114156127B/en
Publication of CN114156127A publication Critical patent/CN114156127A/en
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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
    • 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]
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/14—Terminal arrangements
    • 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
    • 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 pair of contactor, charge-discharge circuit and new energy automobile relates to the low-voltage apparatus field, and the contactor includes: 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 driven iron core; or the main contact is connected with the primary auxiliary contact when the driven iron core is dragged, and the primary auxiliary contact is connected with the secondary auxiliary contact. The application provides a contactor, charge-discharge circuit and new energy automobile can control through relay signal all the way in the battery management system, and the system wiring is simpler, and has released the system and has arranged the space.

Description

Contactor, charge-discharge circuit and new energy automobile
Technical Field
The disclosure relates to the field of low-voltage apparatuses, in particular to a contactor, a charge-discharge loop and a new energy automobile.
Background
At present, the dc contactor is widely used in a battery charging and discharging loop in a battery system. Because the main loop circuit characteristics, the main loop closure can produce great impulse current in the twinkling of an eye, if do not protect, based on direct current contactor self characteristics, direct current contactor in the main loop leads to direct current contactor's main contact adhesion because of impulse current very easily.
In the prior art, the adopted protection measures are generally that a pre-charging loop is connected in parallel at two ends of a main loop direct current contactor. The pre-charging loop is composed of a pre-charging contactor and a pre-charging resistor.
However, this method requires the battery management system to control the pre-charging contactor and the main circuit contactor respectively, and the system wiring is complicated and occupies the system layout space.
Disclosure of Invention
The application provides a contactor, charge-discharge circuit and new energy automobile to need battery management system to control pre-charge contactor and major loop contactor respectively among the solution prior art, the system wiring is more complicated, and occupies the problem that the system arranged the space.
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 being 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 primary auxiliary contact is made of a material of a pre-charge resistor.
In one embodiment of the present application, the material of the secondary auxiliary contact is a conductor material.
In one embodiment of the present application, when a voltage value loaded at two ends of the coil reaches a first voltage value and is less than a second voltage value, the stationary 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 loaded magnitude of voltage in coil both ends reaches the second magnitude of voltage, quiet iron core attracts move the iron core and remove, move the iron core and drag main contact removes, so that main contact with one-level auxiliary contact connects, just main contact promotes one-level auxiliary contact removes, so that one-level auxiliary contact with second grade auxiliary contact connects.
In one embodiment of the present 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 present application, when the voltage value loaded at 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 the initial position by the movable iron core.
According to a second aspect of the present application, there is provided a charge and discharge circuit comprising a contactor; the contactor is controlled by a battery management system, so that the on-off of a charge-discharge loop is controlled; wherein the contactor is any one of the contactors of the first aspect.
According to a third aspect of the application, a new energy automobile is provided, which comprises a charge-discharge loop; the new energy automobile is controlled to start or stop 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 in the second aspect.
The application provides a contactor, includes: 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 driven iron core; or the main contact is connected with the primary auxiliary contact when the driven iron core is dragged, and the primary auxiliary contact is connected with the secondary auxiliary contact. The utility model provides a pair of contactor has set up one-level auxiliary contact and second grade auxiliary contact, can control through relay signal of the same way among the battery management system, and the system connection is simpler, and has released the system and has arranged the space.
The application provides a charge-discharge circuit, includes any above-mentioned 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 simple, and the system arrangement space is released.
The application provides a new energy automobile, including above-mentioned arbitrary charge-discharge circuit. 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 simple, and the system arrangement space is released.
Drawings
Fig. 1 is a schematic circuit diagram of a main circuit contactor with a pre-charging circuit according to an exemplary embodiment of the present application;
FIG. 2 is a schematic diagram of a single contact contactor according to an exemplary embodiment of the present application;
FIG. 3 is a schematic diagram of a contactor according to an exemplary embodiment of the present application;
FIG. 4 is a schematic diagram of a circuit configuration of a contactor according to an exemplary embodiment of the present application;
fig. 5 is a schematic structural view of a contactor according to another exemplary embodiment of the present application.
Detailed Description
The dc contactor is widely used in a battery charging and discharging circuit in a battery system. Because the main loop circuit characteristics, the main loop closure can produce great impulse current in the twinkling of an eye, if do not protect, based on direct current contactor self characteristics, direct current contactor in the main loop leads to direct current contactor's main contact adhesion because of impulse current very easily. At present, the adopted protection measures are generally to connect a pre-charging loop in parallel at two ends of a main loop direct current contactor. The pre-charging loop is composed of a pre-charging contactor and a pre-charging resistor.
However, this method requires the battery management system to control the pre-charging contactor and the dc main circuit contactor respectively, and the system wiring is complicated and occupies the system layout space.
In order to solve the technical problem, the scheme provided by the application comprises a contactor, a primary auxiliary contact and a secondary auxiliary contact are arranged, the closing mode of the contactor can be controlled through one path of contactor (relay) signals in the battery management system, the system wiring is simple, and the system arrangement space is released.
Fig. 1 is a schematic circuit diagram of a main circuit contactor with a pre-charging circuit according to an exemplary embodiment of the present application.
At present, the dc contactor is widely used in a battery charging and discharging loop in a battery system. Because the main loop circuit characteristics, the main loop closure can produce great impulse current in the twinkling of an eye, if do not protect, based on direct current contactor self characteristics, direct current contactor in the main loop leads to direct current contactor's main contact adhesion because of impulse current very easily. The contactors referred to in the present application are all direct current contactors.
As shown in fig. 1, the protection measures adopted in the prior art are generally to connect a pre-charging circuit in parallel at two ends of a main circuit contactor. The pre-charging loop is composed of a pre-charging contactor and a pre-charging resistor. Wherein the main circuit contactor and the pre-charge contactor may be the same contactor.
This scheme requires the battery management system to control the pre-charge contactor and the main circuit contactor, respectively. The system wiring is complicated and occupies the system layout space. As shown in fig. 1, the battery management system requires two relay signals, relay0+ and relay1+, to control the main circuit contactors and the pre-charge contactors, respectively. The battery management system firstly controls the closing of the pre-charging contactor through a relay1+ signal, and the impact current generated by the main circuit is released through the pre-charging circuit, so that the main circuit contactor is protected. The battery management system then controls the main circuit contactors to close via relay0+ signal, after which the battery management system controls the pre-charge circuit to open via relay1+ signal.
Fig. 2 is a schematic structural diagram of a single-contact contactor according to an exemplary embodiment of the present application.
The main circuit contactor and the pre-charge contactor in fig. 1 may be the same contactor, as shown in fig. 2, and are illustrated in a contactor configuration that is common in the prior 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 arranged between the movable contact 4 and the movable iron core 3. The movable contact 4 is connected with the movable iron core 3 through a connecting piece 7. The contactor includes reset spring 6, and 6 one end of reset spring are fixed physically, and the other end links to each other with moving 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 fixed contact except for the movable contact, and is called a single-contact contactor.
Specifically, the stationary core 1 includes the coil 2, when a voltage value loaded at two ends of the coil 2 reaches a third voltage value, an electromagnetic attraction force is generated in the stationary core 1, the electromagnetic attraction force in the stationary core 1 attracts the movable core 3 to move towards the stationary core 1 against a spring force of the return spring 6, and the movable core 3 drags the movable contact 4 to move through the connecting piece 7. The movable contact 4 is dragged by the driven iron core 3 to be connected with the fixed 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, the movable iron core 3 is dragged to reset by one end of the reset spring 6 connected with the movable iron core 3, and the movable contact 4 is dragged to the initial position by the movable iron core 3 through the connecting piece 7.
Fig. 3 is a schematic structural view of a contactor according to an exemplary embodiment of the present application.
As shown in fig. 3, the present application provides a contactor, comprising: 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 iron core 2 under the action of external force. For example, when the movable contact 5 moves towards the primary auxiliary contact 3, the movable contact 5 can contact with the primary auxiliary contact 3, and when the movable contact 5 continues to move towards the primary auxiliary contact 3, the primary auxiliary contact 3 can contact with the secondary auxiliary contact 4.
The main contact 5 is connected with the movable iron core 2 through a connecting piece 6. The coil 7 is arranged in the static iron core 1, 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 driven iron core 2; or the main contact 5 is connected with the primary auxiliary contact 3 when being dragged by the driven 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, an 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 to move toward the stationary core 1. Since the movable iron core 2 is connected with the movable contact 5 through the connecting piece 6, the moving of the movable iron core 2 will drag the contact 5 to move towards the fixed iron core 1 through the connecting piece 6.
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, the movable iron core 2 drags the main contact 5 to generate a 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 not enough to enable the movable contact 5 to continuously move, the primary auxiliary contact 3 is not connected with the secondary auxiliary contact 4. In this case, the contactor may be considered to be in a first-stage pull-in state. When the contactor is used, the movable contact 5 and the first-stage auxiliary contact 3 can be connected into a circuit, and when the contactor is in a first-stage suction state, the movable contact 5 and the first-stage auxiliary contact 3 are contacted, so that the positions, provided with the movable contact 5 and the first-stage auxiliary contact 3, in the circuit are closed.
Preferably, the first-stage auxiliary contact 3 may be made of a pre-charging resistor 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, the movable iron core 2 drags the main contact 5 to generate, the main contact 5 drives the primary auxiliary contact 3 to generate a certain displacement, so that the main contact 5 is connected with the primary auxiliary contact 3, the primary auxiliary contact 3 is connected with the secondary auxiliary contact 4, and namely the main contact 5, the primary auxiliary contact 3 and the secondary auxiliary contact 4 are communicated.
The contactor 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 driven iron core; or the main contact is connected with the primary auxiliary contact when the driven iron core is dragged, and the primary auxiliary contact is connected with the secondary auxiliary contact. The utility model provides a pair of contactor has set up one-level auxiliary contact and second grade auxiliary contact, can control through relay signal of the same way among the battery management system, and the system connection is simpler, and has released the system and has arranged the space. Fig. 4 is a schematic circuit diagram of a contactor according to an exemplary embodiment of the present application.
Fig. 4 is a schematic diagram of a circuit structure of the contactor shown in fig. 3 when used in a main circuit.
Where K1 is closed, it means that the moving contact 5 and the one-stage 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 indicates that the primary auxiliary contact 3 and the secondary auxiliary contact 4 in fig. 3 are in contact. The closing of K1 and K2 indicates that the moving contact 5, the primary auxiliary contact 3 and the secondary auxiliary contact 4 are communicated in the figure 3.
The battery management system only needs a relay2+ signal to control the contactor. When the voltage value loaded by the relay2+ 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 rush 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 relay2+ loaded voltage value reaches the second voltage value, both K1 and K2 are closed. The K1 contact is designed to maximize the contact resistance R, i.e., the resistance of the primary auxiliary contact 3 in fig. 3. The shunt of the K1 loop is small, when K1 and K2 are both closed, the shunt of the K1 loop is small, which is equivalent to open circuit, the energy is saved, and the normal work of the K2 main loop is not influenced.
Compared with the prior art, the contactor in the embodiment only needs one route of relay signals of the battery management system for control, the system is simple in wiring, and the system arrangement space is released.
Fig. 5 is a schematic structural view of a contactor according to another exemplary embodiment of the present application.
As shown in fig. 5, the present application provides a contactor, comprising: 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 coil 7 is arranged in the static iron core 1, 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 driven iron core 2; or the main contact 5 is connected with the primary auxiliary contact 3 when being dragged by the driven 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 may be made of ceramic, aluminum alloy or other alternative materials. The structure and size of the primary auxiliary contact 3 are not required, and are specifically determined according to the parameters of the pre-charging resistor, namely the resistance value of the pre-charging resistor and the power requirement.
Preferably, the secondary auxiliary contact 4 is made of a conductive material. Preferably, the material of the main contact 5 may be a conductive material. The secondary auxiliary contact 4 and the main contact 5 may be made of copper-silver alloy or other materials with strong conductivity.
Preferably, a contact 10 may be disposed on a mutual contact surface of the primary auxiliary contact 3, the secondary auxiliary contact 4, and the main contact 5, so as to facilitate mutual connection among the primary auxiliary contact 3, the secondary auxiliary contact 4, and the main contact 5. The contact may be made of a conductive material, such as copper-silver alloy or other materials with high conductivity.
Specifically, when the voltage value loaded at the two ends of the coil 7 reaches a first voltage value and is smaller than a 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 a 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.
The contactor further comprises a return spring 8; one end of a return spring 8 is fixed on the 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.
Wherein, the first voltage value and the second voltage value can be obtained by calculation. Specifically, when a voltage is applied across the coil 7, an electromagnetic attraction force is generated in the stationary core 1, specifically, in the electromagnetic chamber 9. So that the electromagnetic attraction in the stationary core 1 attracts the movable core 2 to move toward the stationary core 1 against the force of the return spring 8. The moving iron core 2 will drag the contact 5 to move towards the static iron core 1 through the connecting piece 6.
Specifically, the coil 7 is energized, and the formula of the generated electromagnetic attraction force 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 coil 7 loading voltage, and R is the coil 7 resistance.
The electromagnetic attraction attracts the movable iron core 2, and here, the analysis is simplified, and the electromagnetic attraction acting on the movable iron core is considered to be F2, and the electromagnetic attraction overcomes the spring force to drive the movable contact 5 to displace until the force is balanced, and the formula is as follows:
F2＝F1＝kx
where k is the spring coefficient 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.
Therefore, it can be known that x is NU/(Rk) KU, where K is N/Rk, i.e. the displacement x of the moving contact 5 is proportional to the voltage applied to the coil 7.
When voltages U are loaded at two ends of the coil 7 are different, the displacement x of the movable contact 5 is different, and by utilizing the characteristic, the movable contact 5 is respectively contacted with the primary auxiliary contact 3 and the secondary auxiliary contact 4 by loading different voltages.
By calculation, the first voltage value may be 12V, for example. When a voltage of 12V is applied, the displacement x of the movable contact 5 is x1. At this time, the movable contact 5 is just connected to the primary auxiliary contact 3 and disconnected from the secondary auxiliary contact 4, which is referred to as a primary connection state. The coil 7 is continuously pressurized, for example, the second voltage may be 24V, and when 24V is applied, the displacement x of the movable contact 5 is equal to (x)1+x2). At this time, the movable contact 5 is just connected with the primary auxiliary contact 3 and the secondary auxiliary contact 4 respectively, and the connection state is called a secondary connection state.
When the contactor is in a primary connection state, the impact current generated by the system is released through the primary auxiliary contact 3 loop, so that the secondary auxiliary contact 4 is protected.
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 the resistance value of the primary auxiliary contact 3 is made to be as large as possible in the design of the primary auxiliary contact 3, so that in the normal working process of the main loop, the shunt in the loop of the primary auxiliary contact 3 is small, which is equivalent to open circuit, and the working of the main loop is not influenced.
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 return, and the main contact 5 is dragged to the initial position by the movable iron core 2.
Specifically, when the voltage value applied to the coil 7 becomes zero, the stationary core 1 does not have electromagnetic attraction to the movable core 2. The reset spring 8 resets, and the reset spring 8 drags the movable iron core 2 with the one end that the movable iron core 2 links to each other and resets to the movable iron core 2 drags the main contact 5 to initial position through the 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 contacts 4 may be fixed to a fixed object.
Optionally, as shown in fig. 2, the contactor may further include a return spring 11, one end of the return spring 11 is fixed on the fixed object, and the other end is connected to the primary auxiliary contact 3. The spring force of the return spring 11 also needs to be overcome when the main contact 5 pushes the primary auxiliary contact 3 to move. 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 contactors described above.
Specifically, according to the charge and discharge loop provided by the application, the contactor is controlled by the voltage loaded at two ends of the coil 7 through the battery management system, and then the on-off of the charge and discharge loop is controlled. Wherein the contactor is any one of the contactors described above.
Specifically, when the voltage value loaded at the 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, 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. Because the primary auxiliary contact 3 is made of a pre-charging resistor material, the impact current generated by the system can be released through the loop of the primary auxiliary contact 3, and the secondary auxiliary contact 4 is protected.
When the voltage value loaded at the two ends of the coil 7 reaches a 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 switched on and starts to work normally.
When the voltage value loaded at the two ends of the coil 7 is zero, the static iron core 1 does not generate electromagnetic attraction, and the movable iron core 2 can drive the main contact 5 to reset through the reset spring 8 in an implementation mode, so that the main circuit is disconnected.
In another aspect, the present application further provides a new energy vehicle, including a charge and discharge circuit. And the new energy automobile is controlled to start or stop by controlling the on or off of the charge and discharge loop. Wherein the charge-discharge circuit is any one of the charge-discharge circuits described above.
Specifically, the new energy automobile is controlled to start by controlling the charging and discharging loop to be connected; and the new energy automobile is controlled to be flameout by controlling the disconnection of the charge-discharge loop.
Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention 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 invention 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 will be understood that the present application is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.

Claims (8)

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;
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 being dragged by the movable iron core, and the primary auxiliary contact is connected with the secondary auxiliary contact.
2. The contactor according to claim 1, wherein the primary auxiliary contact is made of a material of a pre-charge resistor.
3. The contactor according to claim 1, wherein the secondary auxiliary contact is made of a conductive material.
4. The contactor according to claim 1,
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 loaded magnitude of voltage in coil both ends reaches the second magnitude of voltage, quiet iron core attracts move the iron core and remove, move the iron core and drag main contact removes, so that main contact with one-level auxiliary contact connects, just main contact promotes one-level auxiliary contact removes, so that one-level auxiliary contact with second grade auxiliary contact connects.
5. The contactor according to any of claims 4, wherein 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.
6. The contactor according to claim 5,
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 the initial position by the movable iron core.
7. A charge-discharge circuit is characterized by comprising a contactor;
the contactor is controlled by a battery management system, so that the on-off of a charge-discharge loop is controlled; wherein the contactor is the contactor as claimed in claims 1 to 6.
8. A new energy automobile is characterized by comprising a charge-discharge loop;
the new energy automobile is controlled to start or stop by controlling the on or off of the charging and discharging loop; wherein the charge/discharge circuit is the charge/discharge circuit according to claim 7.
CN202111327273.3A 2021-11-10 2021-11-10 Contactor, charge-discharge loop and new energy automobile Active CN114156127B (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US20200144010A1 (en) * 2018-10-12 2020-05-07 Eaton Electrical Ltd. 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

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US20200144010A1 (en) * 2018-10-12 2020-05-07 Eaton Electrical Ltd. 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
CN111128607A (en) * 2020-01-09 2020-05-08 嘉兴赛铁龙电气有限公司 Electromagnetic contactor for electric locomotive

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
刘劲松;: "接触器辅助触点接触电阻产生原因分析", 山东工业技术, no. 13 *

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