CN219696335U - New energy electric vehicle and large current instantaneous circuit thereof - Google Patents
New energy electric vehicle and large current instantaneous circuit thereof Download PDFInfo
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- CN219696335U CN219696335U CN202320968469.9U CN202320968469U CN219696335U CN 219696335 U CN219696335 U CN 219696335U CN 202320968469 U CN202320968469 U CN 202320968469U CN 219696335 U CN219696335 U CN 219696335U
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Abstract
The utility model discloses a new energy electric vehicle and a large current instantaneous circuit, wherein the large current instantaneous circuit comprises a contactor, a switch module, a first triode, a first voltage stabilizing tube and a controller, the contactor comprises a contact switch and an electromagnetic coil, one end of the electromagnetic coil is connected with the first triode and the first voltage stabilizing tube, one end of the electromagnetic coil in the contactor is connected with the first voltage stabilizing tube and the first triode, and when the contactor is in a large current working state, the energy stored by the electromagnetic coil can be guided to the ground through the first voltage stabilizing tube and the first triode, so that the problem that the contact switch is bonded and can not be disconnected under the large current is effectively avoided, the aim of high-efficiency and quick disconnection is fulfilled, and the running safety of the new energy electric vehicle is improved.
Description
Technical Field
The utility model relates to the technical field of new energy electric vehicles, in particular to a new energy electric vehicle and a large-current instantaneous circuit.
Background
When the new energy electric vehicle in the prior art is in overcurrent or short circuit, the switching contact points in the coil of the contactor are fused and adhered and cannot be disconnected rapidly due to the energy storage in the high-energy working state, so that the new energy electric vehicle has potential safety hazards of running or cannot run.
Disclosure of Invention
The embodiment of the utility model provides a new energy electric vehicle and a movable switch thereof, which are used for solving the problem that the new energy electric vehicle has potential safety hazard or cannot run due to the fact that the switch cannot be rapidly disconnected when the new energy electric vehicle is in overcurrent or short circuit in the prior art.
An embodiment of the present utility model provides a high-current instantaneous circuit of a new energy electric vehicle, where the high-current instantaneous circuit includes:
the contactor comprises a contact switch and an electromagnetic coil, wherein two ends of the contact switch are respectively connected with an input module and an output module;
the input end of the switch module is connected with the power supply module, and the output end of the switch module is connected with the first end of the electromagnetic coil;
the collector electrode of the first triode is connected with the second end of the electromagnetic coil, and the emitter electrode of the first triode is connected with the ground;
the cathode end of the first voltage stabilizing tube is connected with the second end of the electromagnetic coil, and the anode end of the first voltage stabilizing tube is connected with the base electrode of the first triode;
and a first output end of the controller is connected with a control end of the switch module, and a second output end of the controller is connected with a grid electrode of the first triode.
Preferably, the switch module is a MOS transistor, a source of the MOS transistor is an input end of the switch module, a drain of the MOS transistor is an output end of the switch module, and a gate of the MOS transistor is a control end of the switch module.
Preferably, the high-current transient circuit further comprises:
and the current detection module is arranged adjacent to the contact switch, and the first output end of the current detection module is connected with the first input end of the controller.
Preferably, the current detection module is a magneto-resistive tunnel magneto-resistance meter.
Preferably, the high-current instantaneous interruption circuit further comprises a diode D1 and a resistor R1, wherein an anode of the diode D1 is connected with the second output end of the controller, a cathode of the diode D1 is connected with the first end of the resistor R1, and a second end of the resistor R1 is connected with the gate of the first triode.
Preferably, the high-current instantaneous circuit further comprises a resistor R2, a resistor R3, a resistor R4, a voltage-stabilizing tube D3, a triode Q2 and a capacitor C1, wherein the second output end of the current detection module is connected with the cathode of the voltage-stabilizing tube D3, the anode of the voltage-stabilizing tube D3 is connected with the first end of the resistor R4 and the first end of the capacitor C1, the second end of the capacitor C1 is connected with the ground, the second end of the resistor R4 is connected with the base electrode of the triode Q2, the emitter electrode of the triode Q2 is connected with the ground, the collector electrode of the triode Q2 is respectively connected with the first end of the resistor R2 and the first end of the resistor R3, the second end of the resistor R2 is connected with the second output end of the controller, and the second end of the resistor R3 is connected with the second input end of the controller.
A second aspect of the embodiment of the present utility model provides a new energy electric vehicle, including the high current transient circuit provided in the first aspect.
The technical effects of the embodiment of the utility model are as follows: through making solenoid's in the contactor one end connect first voltage regulator tube and first triode, when the contactor is in heavy current operating condition, make solenoid's stored energy can pass through first voltage regulator tube and first triode direction ground fast, avoided the problem that contact switch bonds unable disconnection under the heavy current effectively, realized the purpose of high-efficient quick disconnection, promoted the traveling safety of new forms of energy electric motor car. And through the stability control of the first voltage stabilizing tube, the energy stored by the electromagnetic coil can not generate excessive voltage in the process of guiding the ground, and the risk of equipment damage is avoided. In addition, the adopted components are generally common and relatively low in price, so that the cost is low.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments of the present utility model will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a high-current instantaneous circuit of a new energy electric vehicle according to a first embodiment of the present utility model;
fig. 2 is a schematic diagram of a current flow of a high-current instantaneous circuit of a new energy electric vehicle according to an embodiment of the present utility model;
fig. 3 is another schematic structural diagram of a high-current instantaneous circuit of a new energy electric vehicle according to the first embodiment of the present utility model;
fig. 4 is a circuit diagram of an example one of a high-current instantaneous circuit of a new energy electric vehicle according to the first embodiment of the present utility model;
fig. 5 is a schematic diagram of a current flow of an example one of a high-current transient circuit of a new energy electric vehicle according to the first embodiment of the present utility model;
fig. 6 is another circuit diagram of a high-current instantaneous circuit of a new energy electric vehicle according to the first embodiment of the present utility model;
in the figure: 10. a contactor; 20. an input module; 30. an output module; 40. a power module; 50. a first triode; 60. a first voltage stabilizing tube; 70. a controller; 80. a switch module; 90. a current detection module; 101. a contact switch; 102. an electromagnetic coil.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be understood that the present utility model may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the utility model to those skilled in the art. In the drawings, the dimensions and relative dimensions of layers and regions may be exaggerated for the same elements throughout for clarity.
It will be understood that when an element or layer is referred to as being "on" …, "" adjacent to "…," "connected to" or "coupled to" another element or layer, it can be directly on, adjacent to, connected to or coupled to the other element or layer, or intervening elements or layers may be present. In contrast, when an element is referred to as being "directly on" …, "" directly adjacent to "…," "directly connected to" or "directly coupled to" another element or layer, there are no intervening elements or layers present. It will be understood that, although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the present utility model.
Spatially relative terms, such as "under …," "under …," "below," "under …," "above …," "above," and the like, may be used herein for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use and operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements or features described as "under" or "beneath" other elements would then be oriented "on" the other elements or features. Thus, the exemplary terms "under …" and "under …" may include both an upper and a lower orientation. The device may be otherwise oriented (rotated 90 degrees or other orientations) and the spatially relative descriptors used herein interpreted accordingly.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. As used herein, the term "and/or" includes any and all combinations of the associated listed items.
In the following description, for the purpose of providing a thorough understanding of the present utility model, detailed structures and steps are presented in order to illustrate the technical solution presented by the present utility model. Preferred embodiments of the present utility model are described in detail below, however, the present utility model may have other embodiments in addition to these detailed descriptions.
Example 1
The embodiment of the utility model provides a high-current instantaneous circuit of a new energy electric vehicle, which solves the problems that in the prior art, when the new energy electric vehicle is in overcurrent or short circuit, a switch cannot be disconnected, so that the new energy electric vehicle has potential safety hazard or cannot run.
According to a first technical scheme provided by the embodiment of the utility model, as shown in fig. 1, a high-current instantaneous circuit of a new energy electric vehicle is provided, the high-current instantaneous circuit comprises:
the contactor 10 comprises a contact switch 101 and an electromagnetic coil 102, wherein two ends of the contact switch 101 are respectively connected with the input module 20 and the output module 30;
the switch module 80 has an input end connected to the power module 40 and an output end connected to a first end of the electromagnetic coil 102;
a first triode 50, the collector of which is connected to the second end of the electromagnetic coil 102, and the emitter of which is connected to ground;
a first voltage regulator 60, the cathode end of which is connected to the second end of the electromagnetic coil 102, and the anode end of which is connected to the base of the first triode 50;
the first output terminal of the controller 70 is connected to the control terminal of the switch module 80, and the second output terminal is connected to the gate of the first transistor 50.
The large current is a current with a current value exceeding a preset value. The output modules 20 and 30 can be power supply modules and various power utilization modules on the new energy electric vehicle.
The switch module 80 is a MOS transistor, a source of the MOS transistor is an input end of the switch module 80, a drain of the MOS transistor is an output end of the switch module 80, and a gate of the MOS transistor is a control end of the switch module 80.
When the controller 70 controls the switch module 80 to be turned on, the power module 40 charges the electromagnetic coil 102 through the switch module 80, the contact switch 101 is turned on, and the input module 20, the contact switch 101 and the output module 30 form a loop. When the controller 70 controls the switch module 80 to turn off, the electromagnetic coil 102 still has energy, the contact switch 101 cannot be rapidly disconnected, by setting the first voltage stabilizing tube 60 and the first triode 70 to be connected in parallel, the electromotive force of the electromagnetic coil 102 can reversely break down the first voltage stabilizing tube 60, as shown in fig. 2, the current flow direction of the output current is divided into two paths, the first current flow path is the electromagnetic coil 102, the first triode 50 and the grounding end, and the second current flow path is the electromagnetic coil 102, the first voltage stabilizing tube 60, the first triode 50 and the grounding end, so that the energy stored by the electromagnetic coil 102 is rapidly guided to the ground through the first voltage stabilizing tube 60 and the first triode 50, and the contact switch 101 is rapidly disconnected.
The first technical scheme has the technical effects that: through making solenoid's in the contactor one end connect first voltage regulator tube and first triode, when the contactor is in heavy current operating condition, make solenoid's stored energy can pass through first voltage regulator tube and first triode direction ground fast, avoided the problem that contact switch bonds unable disconnection under the heavy current effectively, realized the purpose of high-efficient quick disconnection, promoted the traveling safety of new forms of energy electric motor car. And through the stability control of the first voltage stabilizing tube, the energy stored by the electromagnetic coil can not generate excessive voltage in the process of guiding the ground, and the risk of equipment damage is avoided. In addition, the adopted components are generally common and relatively low in price, so that the cost is low.
In a second technical solution provided in the first embodiment of the present utility model, as shown in fig. 3, the high-current transient circuit further includes:
the current detection module 90 is disposed adjacent to the contact switch 101, and has an output terminal connected to an input terminal of the controller 70.
When the controller 70 detects that the circuit in which the contact switch 101 is located is shorted or the current suddenly increases through the current detection module 90, the control switch module 80 is turned off, and the contact switch 101 is turned off.
Further, the current detection module 90 is TMR (Tunneling Magnetoresistance Sensor, magnetoresistive tunneling magnetoresistance meter).
Wherein TMR is a method of detecting a current change by using a resistivity change of a magnetic field modulation. TMR elements are typically composed of two ferromagnetic electrodes and a non-magnetic insulating tunnel layer. When current passes through the tunnel layer, they interact with the magnetic electrons within the tunnel layer, causing a change in resistivity. This change in resistivity can be detected by measuring the resistance value of the device. When a magnetic field is applied to change, the magnetization directions of the two ferromagnetic electrodes change, so that the spin direction of the magnetic electrons in the tunnel layer relatively changes. Such a change in spin relative results in a change in the scattering rate of electrons in the tunnel layer and thus in a change in resistivity. Therefore, when a short circuit occurs in the circuit of the contact switch 101 or a large current occurs, the resistance value of the TMR element changes, and this change can be used to detect a change in current.
The technical effect of the second technical scheme is as follows: by employing the TMR element, current detection with high sensitivity, high speed, and high accuracy can be achieved. In addition, the TMR element has the advantages of lower power consumption and small volume.
As an example, as shown in fig. 4, the high-current transient circuit further includes a diode D1 and a resistor R1, where an anode of the diode D1 is connected to the second output terminal of the controller, a cathode of the diode D1 is connected to the first terminal of the resistor R1, and a second terminal of the resistor R1 is connected to the gate of the first triode. The first triode is triode Q1, and the first voltage regulator tube is voltage regulator tube D2. Specifically, the high-current instantaneous circuit comprises a DC power supply, a MOS tube, a contactor, a voltage stabilizing tube D2, a triode Q1, a resistor R1, a diode D1, a singlechip and a TMR. DC power supply connects the source electrode of MOS pipe, the first end of solenoid L in the contact is connected to the drain electrode of MOS pipe, the second end of solenoid L connects the negative pole end of steady voltage tube D2 and triode Q1's collecting electrode, the second end of resistance R1 and triode Q1's base are connected to steady voltage tube D2's positive pole end, diode D1's negative pole is connected to resistance R1's first end, the first output of singlechip is connected to diode D1's positive pole, the grid of MOS pipe is connected to the second output of singlechip, TMR is located near contact switch K, the input of singlechip is connected to TMR's output.
Compared with the prior art, in the example, no voltage stabilizing tube is arranged in the prior art, when the controller controls the contactor to be disconnected, the energy in the electromagnetic coil can only slowly flow to the ground, and the contact switch can not be disconnected until the energy stored in the electromagnetic coil is released. The process requires about 40ms, and under the condition of large current, the contact switch is easy to adhere together, so that the driving safety of the new energy electric vehicle is affected.
In this example, the voltage regulator tube D2 and the triode Q1 are added, the electromotive force of the electromagnetic coil L breaks down the voltage regulator tube D2 in the opposite direction, so that the energy stored in the electromagnetic coil L is quickly guided to the ground through the voltage regulator tube D2 and the triode Q1, as shown in fig. 5, the current flow direction of the electromagnetic coil L is divided into two paths, the first current flow direction path is the electromagnetic coil L, the triode Q1 and the grounding end, and the second current flow direction path is the electromagnetic coil L, the voltage regulator tube D2, the triode Q1 and the grounding end, so that the energy stored in the electromagnetic coil L is quickly guided to the ground through the voltage regulator tube D2 and the triode Q1, and the contact switch is quickly disconnected. The time consumption of the process is about 2-4ms, which is far less than the time required by the condition without the voltage stabilizing tube D2, the conditions of sticking and the like of the contact switch can not occur, and the safety is greatly improved.
The technical effects of this example are: through setting up the stabilizator and being connected with solenoid's one end after triode connects in parallel, when taking place the short circuit or heavy current appears suddenly, can make contact switch break off fast, can not glue and glue together, promoted the security of new forms of energy electric motor car.
According to the technical scheme III provided by the embodiment of the utility model, as shown in fig. 6, the high-current instantaneous interruption circuit further comprises a resistor R2, a resistor R3, a resistor R4, a voltage stabilizing tube D3, a triode Q2 and a capacitor C1, wherein the second output end of the current detection module is connected with the cathode of the voltage stabilizing tube D3, the anode of the voltage stabilizing tube D3 is connected with the first end of the resistor R4 and the first end of the capacitor C1, the second end of the capacitor C1 is connected with the ground, the second end of the resistor R4 is connected with the base electrode of the triode Q2, the emitter electrode of the triode Q2 is connected with the ground, the collector electrode of the triode Q2 is respectively connected with the first end of the resistor R2 and the first end of the resistor R3, the second end of the resistor R2 is connected with the second output end of the controller, and the second end of the resistor R3 is connected with the second input end of the controller.
The working process of the third technical scheme is as follows: the TMR feeds back the detection signal to the singlechip and simultaneously transmits the voltage signal to the voltage stabilizing tube D3, if the contact switch K is not disconnected after 2-4ms, the triode Q2 is conducted after the capacitor C1 lags behind 1-2ms, so that the level of the singlechip and the diode D1 is changed from high to low, which is equivalent to the singlechip transmitting a disconnection signal, and the subsequent switch disconnection flow is the same as the above.
The technical effect of the third technical scheme is as follows: the technical scheme can avoid the problem that the switch cannot be disconnected due to the fact that energy cannot be quickly released when software is wrong, can improve the reliability and stability of the switch, and ensures the circuit safety under high current load.
Example two
The second embodiment of the utility model provides a new energy electric vehicle, which comprises the large-current instantaneous circuit provided by the first embodiment.
The above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model, and are intended to be included in the scope of the present utility model.
Claims (7)
1. The utility model provides a heavy current instant circuit of new forms of energy electric motor car which characterized in that, heavy current instant circuit includes:
the contactor comprises a contact switch and an electromagnetic coil, wherein two ends of the contact switch are respectively connected with an input module and an output module;
the input end of the switch module is connected with the power supply module, and the output end of the switch module is connected with the first end of the electromagnetic coil;
the collector electrode of the first triode is connected with the second end of the electromagnetic coil, and the emitter electrode of the first triode is connected with the ground;
the cathode end of the first voltage stabilizing tube is connected with the second end of the electromagnetic coil, and the anode end of the first voltage stabilizing tube is connected with the base electrode of the first triode;
and a first output end of the controller is connected with a control end of the switch module, and a second output end of the controller is connected with a grid electrode of the first triode.
2. The high-current instantaneous interruption circuit of claim 1, wherein the switch module is a MOS transistor, a source of the MOS transistor is an input terminal of the switch module, a drain of the MOS transistor is an output terminal of the switch module, and a gate of the MOS transistor is a control terminal of the switch module.
3. The high current transient circuit of claim 1, wherein said high current transient circuit further comprises:
and the current detection module is arranged adjacent to the contact switch, and the first output end of the current detection module is connected with the first input end of the controller.
4. A high current transient circuit as recited in claim 3, wherein said current sensing module is a magnetoresistive tunneling magnetoresistive meter.
5. The high current snap-through circuit of claim 4 further comprising a diode D1 and a resistor R1, wherein an anode of the diode D1 is connected to the second output terminal of the controller, a cathode of the diode D1 is connected to the first terminal of the resistor R1, and a second terminal of the resistor R1 is connected to the gate of the first triode.
6. The high-current transient circuit of claim 5, further comprising a resistor R2, a resistor R3, a resistor R4, a regulator tube D3, a transistor Q2, and a capacitor C1, wherein a second output terminal of the current detection module is connected to a cathode of the regulator tube D3, an anode of the regulator tube D3 is connected to a first terminal of the resistor R4 and a first terminal of the capacitor C1, a second terminal of the capacitor C1 is connected to ground, a second terminal of the resistor R4 is connected to a base of the transistor Q2, an emitter of the transistor Q2 is connected to ground, a collector of the transistor Q2 is connected to the first terminal of the resistor R2 and the first terminal of the resistor R3, a second terminal of the resistor R2 is connected to a second output terminal of the controller, and a second terminal of the resistor R3 is connected to a second input terminal of the controller.
7. A new energy electric vehicle, characterized in that it comprises the high current instantaneous circuit according to any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320968469.9U CN219696335U (en) | 2023-04-21 | 2023-04-21 | New energy electric vehicle and large current instantaneous circuit thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320968469.9U CN219696335U (en) | 2023-04-21 | 2023-04-21 | New energy electric vehicle and large current instantaneous circuit thereof |
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| CN219696335U true CN219696335U (en) | 2023-09-15 |
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| CN202320968469.9U Active CN219696335U (en) | 2023-04-21 | 2023-04-21 | New energy electric vehicle and large current instantaneous circuit thereof |
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