CN219668137U - Transportation mode switching circuit, vehicle-mounted TBOX and automobile - Google Patents
Transportation mode switching circuit, vehicle-mounted TBOX and automobile Download PDFInfo
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- CN219668137U CN219668137U CN202321080035.1U CN202321080035U CN219668137U CN 219668137 U CN219668137 U CN 219668137U CN 202321080035 U CN202321080035 U CN 202321080035U CN 219668137 U CN219668137 U CN 219668137U
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Abstract
The utility model discloses a transportation mode switching circuit, a vehicle-mounted TBOX and an automobile, wherein the transportation mode switching circuit comprises: the power supply input end is used for being connected with a power supply; the power supply output end is used for being connected with an electricity load; the main switch circuit is arranged between the power input end and the power output end in series and is used for controlling the power input end to be electrically connected with the power output end when being conducted; and the control end of the switching control circuit is connected with the controlled end of the main switching circuit, and the switching control circuit is used for controlling the main switching circuit to disconnect the electric connection between the power input end and the power output end so as to enable the vehicle-mounted TBOX to be in a transportation mode, or controlling the main switching circuit to control the power input end to be electrically connected with the power output end so as to enable the vehicle-mounted TBOX to be in a working mode. The utility model can solve the problem of large leakage current of the existing vehicle-mounted TBOX.
Description
Technical Field
The utility model relates to the technical field of electronic equipment, in particular to a transportation mode switching circuit, a vehicle-mounted TBOX and an automobile.
Background
Currently, in a vehicle-mounted TBOX, a standby battery is generally provided for communication power supply in an emergency, and a switch circuit is provided between the standby battery and an electric load in the vehicle-mounted TBOX, and in the emergency, for example, a car accident occurs to cause damage to a vehicle power supply system, at this time, the switch circuit is controlled to be turned on, so that the standby battery supplies power to the electric load in the vehicle-mounted TBOX for emergency communication. Although the switching circuit is in an off state under normal conditions, a large leakage current still exists, so that the electric quantity of the standby battery can be obviously reduced after long-time transportation and storage processes of the vehicle-mounted TBOX, and the subsequent loading requirements cannot be met.
Disclosure of Invention
The utility model mainly aims to provide a transportation mode switching circuit, which aims to solve the problem of large leakage current of the existing vehicle-mounted TBOX.
In order to achieve the above object, the present utility model provides a transportation mode switching circuit, comprising:
the power supply input end is used for being connected with a power supply;
the power supply output end is used for being connected with an electricity load;
the main switch circuit is arranged between the power input end and the power output end in series and is used for controlling the power input end to be electrically connected with the power output end when being conducted;
and the control end of the switching control circuit is connected with the controlled end of the main switching circuit, and the switching control circuit is used for controlling the main switching circuit to disconnect the electric connection between the power input end and the power output end so as to enable the vehicle-mounted TBOX to be in a transportation mode, or controlling the main switching circuit to control the power input end to be electrically connected with the power output end so as to enable the vehicle-mounted TBOX to be in a working mode.
Optionally, the transportation mode switching circuit further includes:
the output end of the switching trigger circuit is connected with the controlled end of the switching control circuit, and the switching trigger circuit is used for outputting a mode switching signal to the switching control circuit when being triggered by a user so that the switching control circuit controls the main switching circuit to be switched on or switched off.
Optionally, the transportation mode switching circuit further includes:
the control end of the control circuit is connected with the controlled end of the switching control circuit, and the control circuit is used for outputting a transportation mode switching signal to the switching control circuit, so that the switching control circuit controls the main switch circuit to disconnect the electric connection between the power input end and the power output end, and the vehicle-mounted TBOX is in a transportation mode; or,
the control circuit is used for outputting a working mode switching signal to the switching control circuit, so that the switching control circuit controls the main switch circuit to control the power input end to be electrically connected with the power output end, and the vehicle-mounted TBOX is in a working mode.
Optionally, the transportation mode switching circuit further includes:
the switching trigger circuit is used for outputting a mode switching signal when triggered by a user;
the control circuit is used for outputting a transportation mode switching signal to the switching control circuit when receiving the mode switching signal, so that the switching control circuit controls the main switching circuit to disconnect the electric connection between the power input end and the power output end, and the vehicle-mounted TBOX is in a transportation mode; or,
and the control circuit is used for outputting a working mode switching signal to the switching control circuit when the mode switching signal is not received, so that the switching control circuit controls the main switching circuit to control the power input end to be electrically connected with the power output end, and the vehicle-mounted TBOX is in a working mode.
Optionally, the switching control circuit further includes:
and the first end of the pull-up circuit is connected with the power output end, the second end of the pull-up circuit is connected with the controlled end of the switching control circuit, and the pull-up circuit is used for pulling up the level of the controlled end of the switching control circuit.
Optionally, the switching control circuit further includes:
and the first end of the pull-down circuit is connected with the controlled end of the switching control circuit, the second end of the pull-down circuit is grounded, and the pull-down circuit is used for pulling down the level of the controlled end of the switching control circuit.
Optionally, the switching control circuit includes a first resistor, a first switching tube and a second switching tube, a first end of the first resistor is connected with the power input end, a second end of the first resistor is connected with a first end of the first switching tube, a second end of the first switching tube is connected with a second end of the second switching tube, a first end of the second switching tube is grounded, a controlled end of the first switching tube is connected with a controlled end of the second switching tube, and a second end of the first switching tube is connected with a controlled end of the second switching tube.
Optionally, the transportation mode switching circuit further includes:
the input filter circuit is arranged between the power input end and the main switch circuit in series, and the input filter circuit outputs the power after being subjected to filter processing on an accessed power;
the output filter circuit is arranged between the power output end and the main switch circuit in series, and the output filter circuit outputs the power after being subjected to filter processing with the power for output.
The utility model also proposes a vehicle-mounted TBOX comprising:
a battery; the method comprises the steps of,
in the transportation mode switching circuit, the power input end of the transportation mode switching circuit is connected with the battery.
The utility model also provides an automobile, which comprises the vehicle-mounted TBOX; alternatively, the transport mode switching circuit described above is included.
According to the utility model, the main switch circuit and the switching control circuit are arranged, so that the transportation mode and the normal working mode of the vehicle-mounted TBOX are realized, and the switching control circuit controls the main switch circuit to disconnect the electric connection between the power input end and the power output end in the transportation mode, so that the connection between the battery and the rear end is disconnected, the leakage current is greatly reduced, the vehicle-mounted TBOX can keep higher battery power in the long-time transportation and storage process, the subsequent loading requirement is met, and the problem of high leakage current of the existing vehicle-mounted TBOX is solved.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a functional module of an embodiment of a transport mode switching circuit according to the present utility model;
FIG. 2 is a schematic diagram of a functional module of an embodiment of a transport mode switching circuit according to the present utility model;
fig. 3 is a schematic circuit diagram of a transport mode switching circuit according to an embodiment of the utility model.
Reference numerals illustrate:
| reference numerals | Name of the name | Reference numerals | Name of the name |
| 10 | Main switch circuit | Q1～Q3 | First to third switching tubes |
| 20 | Switching control circuit | R1～R3 | First to third resistors |
| 30 | Switching trigger circuit | C1、C2 | First and second capacitors |
| 40 | Control circuit |
The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
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 only 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 noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present utility model, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.
The utility model provides a transportation mode switching circuit.
Currently, in a vehicle-mounted TBOX, a standby battery is generally provided for communication power supply in an emergency, and a switch circuit is provided between the standby battery and an electric load in the vehicle-mounted TBOX, and in the emergency, for example, a car accident occurs to cause damage to a vehicle power supply system, at this time, the switch circuit is controlled to be turned on, so that the standby battery supplies power to the electric load in the vehicle-mounted TBOX for emergency communication. Although the switching circuit is in an off state under normal conditions, a large leakage current still exists, so that the electric quantity of the standby battery can be obviously reduced after long-time transportation and storage processes of the vehicle-mounted TBOX, and the subsequent loading requirements cannot be met.
In order to solve the problems, the utility model sets the transportation mode switching circuit between the standby battery and the switch circuit, and the transportation mode switching circuit disconnects the battery from the switch circuit in the transportation and storage processes, namely enters the transportation mode, so as to greatly reduce the leakage current. When the vehicle-mounted TBOX is normally used, the transportation mode switching circuit controls the battery to be electrically connected with the switch circuit, namely, the vehicle-mounted TBOX enters a normal working mode, so that the battery can be electrically connected with an electricity utilization load at any time.
Referring to fig. 1 to 3, in an embodiment, the transportation mode switching circuit includes:
the power supply input end is used for being connected with a power supply;
the power supply output end is used for being connected with an electricity load;
the main switch circuit 10 is arranged between the power input end and the power output end in series, and the main switch circuit 10 is used for controlling the power input end to be electrically connected with the power output end when being conducted;
and the control end of the switching control circuit 20 is connected with the controlled end of the main switch circuit 10, and the switching control circuit 20 is used for controlling the main switch circuit 10 to disconnect the electric connection between the power input end and the power output end so as to enable the vehicle-mounted TBOX to be in a transportation mode, or controlling the main switch circuit 10 to control the electric connection between the power input end and the power output end so as to enable the vehicle-mounted TBOX to be in a working mode.
In this embodiment, the transportation mode switching circuit is composed of a main switching circuit 10 and a switching control circuit 20, where the main switching circuit 10 is serially connected between a power input end and a power output end, and the main switching circuit 10 can be implemented by using switching devices such as a circuit breaker, a power tube, and a relay to control the power input end to be electrically connected with the power output end, or disconnect the power input end from the power output end to be electrically connected with each other, so as to implement a transportation mode or a normal working mode of the vehicle-mounted TBOX. Specifically, the transportation mode is a mode used by the vehicle-mounted TBOX in the transportation and storage processes, and at this time, the electric connection between the power input end and the power output end needs to be disconnected, so that the leakage current is minimized, and the battery capacity is ensured. The normal working mode is the working mode when the vehicle-mounted TBOX is normally used after being loaded, and the power input end and the power output end are required to be electrically connected at the moment so as to ensure that the battery can supply power for the later-stage power utilization load at any time. It will be appreciated that when the spare batteries selected for use in the TBOX are different, the voltage withstand requirements of the main switch circuit 10 are different, so that the switch devices in the main switch circuit 10 may be selected for use according to the voltage withstand requirements of the selected batteries.
The switching control circuit 20 may be implemented by a controller, a driving circuit, a push-pull circuit, etc., for controlling the on/off of the main switching circuit 10, for example, the switching control circuit 20 may be formed by discrete devices such as a resistor, a capacitor, a switching tube, etc., and the on/off of the switching tube is utilized to output different levels to the main switching circuit 10, so as to control the on/off of the main switching circuit 10, so that the vehicle-mounted TBOX enters the transportation mode or the normal working mode. Alternatively, the switching control circuit 20 may be implemented by a controller, and the controller outputs a control signal of a high level or a low level to the main switch circuit 10, so as to control the main switch circuit 10 to be turned on or off, so that the vehicle TBOX enters the transportation mode or the normal working mode. Specifically, during transportation and storage, the electric quantity of the battery needs to be ensured, and at this time, the switching control circuit 20 controls the main switch circuit 10 to disconnect the electric connection between the power input end and the power output end, that is, the vehicle-mounted TBOX enters the transportation mode, so that the leakage current is greatly reduced during transportation and storage. When the vehicle-mounted TBOX is normally used after loading, the battery and the rear-stage circuit are required to be communicated, so that the battery can supply power to the rear-stage at any time, and at the moment, the switching control circuit 20 controls the main switch circuit 10 to control the power input end to be electrically connected with the power output end, namely, the vehicle-mounted TBOX enters a normal working mode, so that the battery can supply power to the rear-stage power utilization load at any time.
According to the utility model, the main switch circuit 10 and the switching control circuit 20 are arranged, so that the transportation mode and the normal working mode of the vehicle-mounted TBOX are realized, and in the transportation mode, the switching control circuit 20 controls the main switch circuit 10 to disconnect the electric connection between the power input end and the power output end, so that the connection between the battery and the rear end is disconnected, the leakage current is greatly reduced, the vehicle-mounted TBOX can keep higher battery electric quantity in the long-time transportation and storage process, the subsequent loading requirement is met, and the problem of high leakage current of the existing vehicle-mounted TBOX is solved.
Referring to fig. 1 to 3, in an embodiment, the transportation mode switching circuit further includes:
the output end of the switching trigger circuit 30 is connected with the controlled end of the switching control circuit 20, and the switching trigger circuit 30 is used for outputting a mode switching signal to the switching control circuit 20 when triggered by a user, so that the switching control circuit 20 controls the main switch circuit 10 to be turned on or turned off.
In this embodiment, the switching trigger circuit 30 may be implemented by a mechanical switch, so that a user may control the main switch circuit 10 to be turned on or off in a manual control manner, so as to enable the vehicle-mounted TBOX to enter the transportation mode or the normal working mode. The switching trigger circuit 30 may be a mechanical switch that is connected to a power supply, so that when the mechanical switch is controlled to be turned on by a user, a high-level mode switching signal is output, or may be a mechanical switch that is connected to a ground line, so that when the mechanical switch is controlled to be turned on by a user, a low-level mode switching signal is output. It can be understood that the switching control circuit 20 may control the main switch circuit 10 to be turned on when receiving the mode switching signal, or may control the main switch circuit 10 to be turned off when receiving the mode switching signal, and may be set according to practical application requirements.
Referring to fig. 1 to 3, in an embodiment, the transportation mode switching circuit further includes:
a control circuit 40, wherein a control end of the control circuit 40 is connected with a controlled end of the switching control circuit 20, and the control circuit 40 is configured to output a transportation mode switching signal to the switching control circuit 20, so that the switching control circuit 20 controls the main switch circuit 10 to disconnect the electrical connection between the power input end and the power output end, so that the vehicle-mounted TBOX is in a transportation mode; or,
the control circuit 40 is configured to output a working mode switching signal to the switching control circuit 20, so that the switching control circuit 20 controls the main switch circuit 10 to control the power input terminal to be electrically connected with the power output terminal, so that the vehicle TBOX is in a working mode.
In this embodiment, the control circuit 40 may be implemented by using a single-chip microcomputer MCU, a CPLD, an FPGA, or other processors, and the control circuit 40 may be a central processor in the vehicle TBOX, or may be a processor that is specially configured to control the switching control circuit 20. It will be appreciated that the switching device is normally turned on/off based on the level of the controlled terminal, and thus the switching control circuit 20 can realize control of the main switching circuit 10 by outputting a high level or a low level. The switching control circuit 20 may be formed by discrete devices such as a resistor, a capacitor and a switching tube, and two ends of the switching control circuit 20 are respectively connected with the power input end and the controlled end of the main switching circuit 10, so that when the switching control circuit 20 receives the operation mode switching signal output by the control circuit 40, the corresponding switching tube is controlled to be conducted, so that the power input end is controlled to be electrically connected with the controlled end of the main switching circuit 10, namely, the level of the controlled end of the switching device in the main switching circuit 10 is raised, the switching device in the main switching circuit 10 is turned off, the connection between the battery and the rear end is disconnected, and the vehicle-mounted TBOX enters a transportation mode. Similarly, the switching control circuit 20 may further be configured to connect the second input terminal to the ground wire, so that when the switching control circuit 20 receives the operation mode switching signal output by the control circuit 40, it controls the corresponding switching tube to be turned on, so as to control the ground wire to be electrically connected to the controlled terminal of the main switching circuit 10, that is, pull down the level of the controlled terminal of the switching device in the main switching circuit 10, so that the switching device in the main switching circuit 10 is turned on, and control the battery to be connected to the rear terminal, so that the vehicle-mounted TBOX enters the normal operation mode. It should be understood that in the above embodiment, the switching devices selected in the main switching circuit 10 are switching devices that are turned off at a high level and turned on at a low level, and optionally, the switching devices selected in the main switching circuit 10 may also be switching devices that are turned on at a high level and turned off at a low level, and only the input terminal connected to the switching control circuit 20 needs to be changed, which is not limited herein.
Referring to fig. 1 to 3, in an embodiment, the transportation mode switching circuit further includes:
a switching trigger circuit 30, wherein the switching trigger circuit 30 is used for outputting a mode switching signal when triggered by a user;
the receiving end of the control circuit 40 is connected with the output end of the switching trigger circuit 30, the control end of the control circuit 40 is connected with the controlled end of the switching control circuit 20, and the control circuit 40 is used for outputting a transportation mode switching signal to the switching control circuit 20 when receiving the mode switching signal, so that the switching control circuit 20 controls the main switching circuit 10 to disconnect the electrical connection between the power input end and the power output end, and the vehicle-mounted TBOX is in a transportation mode; or,
the control circuit 40 is configured to output a working mode switching signal to the switching control circuit 20 when the mode switching signal is not received, so that the switching control circuit 20 controls the main switch circuit 10 to control the power input terminal to be electrically connected with the power output terminal, so that the vehicle-mounted TBOX is in a working mode.
In this embodiment, the switching trigger circuit 30 may be implemented by using a button, a touch screen, a mechanical switch, etc., and is configured to output a mode switching signal to the control circuit 40 when triggered by a user, where the control circuit 40 may be implemented by using a processor such as a single-chip microcomputer MCU, a CPLD, an FPGA, etc., and the control circuit 40 may be a central processor in the vehicle TBOX, or may be a processor that is additionally configured to be dedicated to controlling the switching control circuit 20. In the present embodiment, the control circuit 40 outputs the transportation mode switching signal to the switching control circuit 20 upon receiving the mode switching signal triggered by the user, so that the on-vehicle TBOX is in the transportation mode. When the control circuit 40 does not receive the mode switching signal triggered by the user, the operating mode switching signal is output to the switching control circuit 20, so that the vehicle TBOX is in the operating mode. It will be appreciated that the control circuit 40 may also be arranged to output the operating mode switch signal when a user triggered mode switch signal is received and to output the transport mode switch signal when a user triggered mode switch signal is not received.
Optionally, the switching control circuit 20 includes a first resistor R1, a first switching tube Q1, and a second switching tube Q2, where a first end of the first resistor R1 is connected to the power input end, a second end of the first resistor R1 is connected to a first end of the first switching tube Q1, a second end of the first switching tube Q1 is connected to a second end of the second switching tube Q2, a first end of the second switching tube Q2 is grounded, a controlled end of the first switching tube Q1 and a controlled end of the second switching tube Q2 are both connected to a control end of the control circuit 40, and a second end of the first switching tube Q1 and a second end of the second switching tube Q2 are both connected to a controlled end of the main switching circuit 10.
Referring to fig. 3, fig. 3 is a schematic circuit diagram of an embodiment of a switching control circuit 20, as shown in fig. 3, the switching control circuit 20 includes a first resistor R1, a first switching tube Q1 and a second switching tube Q2, wherein the switching tube and the first switching tube Q1 in the main switching circuit 10 are PMOS tubes, the second switching tube Q2 is an NMOS tube, and controlled ends of the first switching tube Q1 and the second switching tube Q2 are connected with a control circuit 40. When the control circuit 40 receives the first mode signal, the control circuit 40 outputs a low level to the controlled ends of the first switching tube Q1 and the second switching tube Q2, at this time, the voltage difference between the gate and the source of the second switching tube Q2 does not meet the conducting condition, the second switching tube Q2 is turned off, the gate and the source extreme pressure of the first switching tube Q1 meet the conducting condition, the first switching tube Q1 is turned on, the gate voltage of the switching tube in the main switching circuit 10 is pulled up, the voltage difference between the gate and the source of the switching tube in the main switching circuit 10 does not meet the conducting condition, so that the switching tube in the main switching circuit 10 is turned off, the connection between the battery and the rear end is disconnected, and the vehicle-mounted TBOX enters the transportation mode. When the control circuit 40 receives the second mode signal, the control circuit 40 outputs a high level to the controlled ends of the first switching tube Q1 and the second switching tube Q2, at this time, the gate-source voltage of the first switching tube Q1 does not meet the conducting condition, the first switching tube Q1 is turned off, the gate-source voltage difference of the second switching tube Q2 meets the conducting condition, the second switching tube Q2 is turned on, the gate voltage of the switching tube in the main switching circuit 10 is pulled down, the gate-source voltage difference of the switching tube in the main switching circuit 10 meets the conducting condition, so that the switching tube in the main switching circuit 10 is turned on, and the battery is electrically connected with the rear end, so that the vehicle-mounted TBOX enters the normal working mode.
In the existing vehicle-mounted TBOX, a Power Switch IC is generally adopted in a transportation mode switching circuit, the purpose of cutting off a battery output passage is achieved by closing the IC, a chip with smaller leakage current is required to be selected during design, and chips with different output capacities are required to be selected according to the size of a load. With the development of battery technology, unlike the past nickel-metal hydride batteries, the application of lithium batteries (4.2V) and even high-voltage lithium batteries (8.4V) has higher and higher voltage withstanding requirements for Power Switch IC, and the various requirements have higher cost and weaker flexibility of the circuit. Compared with a Power Switch IC, the transport mode switching circuit has the advantages of simple structure, fewer devices, capability of selecting corresponding discrete devices for building according to the voltage withstand requirement of the battery, low circuit cost and high flexibility.
Referring to fig. 1 to 3, in an embodiment, the switching control circuit 20 further includes:
and the first end of the pull-up circuit is connected with the power output end, the second end of the pull-up circuit is connected with the controlled end of the switching control circuit 20, and the pull-up circuit is used for pulling up the level of the controlled end of the switching control circuit 20.
Optionally, the switching control circuit 20 further includes:
and a pull-down circuit, wherein a first end of the pull-down circuit is connected with the controlled end of the switching control circuit 20, a second end of the pull-down circuit is grounded, and the pull-down circuit is used for pulling down the level of the controlled end of the switching control circuit 20.
In an embodiment, the switching control circuit 20 is further provided with a pull-up circuit and a pull-down circuit, so that the level of the controlled end of the switching control circuit 20 is stabilized at a high level or a low level, and both the pull-up circuit and the pull-down circuit can be implemented by using resistors. The pull-up circuit connects the power output terminal with the controlled terminal of the switching control circuit 20, and when the main switch circuit 10 is turned on, the pull-up circuit can stabilize the controlled terminal of the switching control circuit 20 at a high level, so that the switching control circuit 20 can maintain a state of controlling the main switch circuit 10 to be turned on. The pull-down circuit connects the controlled end of the switching control circuit 20 with the ground, and when the main switch circuit 10 is turned off, the pull-down circuit can stabilize the controlled end of the switching control circuit 20 at a low level, so that the switching control circuit 20 can be maintained in a state of controlling the main switch circuit 10 to be turned off. Meanwhile, a pull-up circuit and a pull-down circuit are arranged, so that the driving capability of the MCU output pin can be improved, and the stable control of the switching control circuit 20 can be realized.
Referring to fig. 1 to 3, in an embodiment, the transportation mode switching circuit further includes:
the input filter circuit is arranged between the power input end and the main switch circuit 10 in series, and outputs the power after being subjected to filter processing;
and the output filter circuit is arranged between the power supply output end and the main switch circuit 10 in series, and outputs the output filter circuit after filtering the output power supply.
In this embodiment, an input filter circuit is disposed at the power input end, and is configured to perform filtering processing on an accessed power source and output the power, and an output filter circuit is disposed at the power output end, and is configured to perform filtering processing on an output power source and output the power. The input filter circuit and the output filter circuit may be selected from resistors, capacitors, etc., and referring to fig. 3, fig. 3 is a schematic circuit diagram of an embodiment of the switching control circuit 20, and as shown in fig. 3, the first capacitor C1 and the second capacitor C2 are filter capacitors, that is, the input filter circuit and the output filter circuit, and are used for performing filtering processing on the connected power supply and the output power supply and outputting the filtered power supply.
In order to better illustrate the inventive concept, the working principle of the present utility model is described below with reference to specific embodiments and schematic circuit diagrams of the overcurrent protection circuit.
Referring to fig. 3, fig. 3 is a schematic circuit diagram of an embodiment of a transportation mode switching circuit, as shown in fig. 3, the main switching circuit 10 is composed of a third switching tube Q3, the switching control circuit 20 includes a first resistor R1, a first switching tube Q1 and a second switching tube Q2, and the control circuit 40 is composed of an MCU. The first switching tube Q1 and the third switching tube Q3 are PMOS tubes, the second switching tube Q2 is an NMOS tube, the second resistor R2 is a pull-up resistor, the third resistor R3 is a pull-down resistor, and the first capacitor C1 and the second capacitor C2 are filter capacitors.
When the MCU outputs a transportation mode switching signal, namely, the MCU outputs a low level to the controlled ends of the first switching tube Q1 and the second switching tube Q2, at the moment, the grid source voltage difference of the second switching tube Q2 does not meet the conducting condition, the second switching tube Q2 is turned off, the grid source extreme pressure of the first switching tube Q1 meets the conducting condition, the first switching tube Q1 is conducted, the grid voltage of the third switching tube Q3 is pulled up, the grid source voltage difference of the third switching tube Q3 does not meet the conducting condition, the third switching tube Q3 is turned off, the connection between a battery and the rear end is disconnected, and the vehicle-mounted TBOX enters the transportation mode.
When the MCU outputs a working mode switching signal, namely the MCU outputs a high level to the controlled ends of the first switching tube Q1 and the second switching tube Q2, at the moment, the grid source voltage of the first switching tube Q1 does not meet the conducting condition, the first switching tube Q1 is turned off, the grid source voltage difference of the second switching tube Q2 meets the conducting condition, the second switching tube Q2 is conducted, the grid voltage of the third switching tube Q3 is pulled down, the grid source voltage difference of the third switching tube Q3 meets the conducting condition, the third switching tube Q3 is conducted, and the battery is electrically connected with the rear end, so that the vehicle-mounted TBOX enters a normal working mode.
In addition, the third switching tube Q3 may be replaced by a power PNP tube or other switching devices, and the first switching tube Q1 and the second switching tube Q2 may also be replaced by other switching devices such as a triode or an IGBT, which may be selected according to practical application requirements. It is worth noting that, the size of the Power Switch IC is generally smaller, so the internal resistance cannot be made small, and under the use scene of large current, the heating value is larger, but the utility model can select the third switching tube Q3 with proper internal resistance conduction according to the actual load current, so as to ensure that the heating is in a controllable range, and the third switching tube Q3 can select the corresponding third switching tube Q3 according to the voltage-withstanding requirement of the battery. The transportation mode switching circuit has the advantages of simple structure, few devices, low circuit cost and high flexibility.
The utility model also provides a vehicle-mounted TBOX, which comprises a battery and the transportation mode switching circuit, wherein the power input end of the transportation mode switching circuit is connected with the battery. The specific structure of the transportation mode switching circuit refers to the above embodiments, and since the vehicle-mounted TBOX adopts all the technical solutions of all the embodiments, at least has all the beneficial effects brought by the technical solutions of the embodiments, and will not be described in detail herein.
The utility model also provides an automobile, which comprises the vehicle-mounted TBOX; or, the specific structure of the vehicle-mounted TBOX or the transportation mode switching circuit refers to the above embodiments, and the present vehicle adopts all the technical solutions of all the above embodiments, so that at least the present vehicle has all the beneficial effects brought by the technical solutions of the above embodiments, which are not described in detail herein.
The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the description of the present utility model and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the utility model.
Claims (10)
1. A transportation mode switching circuit for use in an on-board TBOX, comprising:
the power supply input end is used for being connected with a power supply;
the power supply output end is used for being connected with an electricity load;
the main switch circuit is arranged between the power input end and the power output end in series and is used for controlling the power input end to be electrically connected with the power output end when being conducted;
and the control end of the switching control circuit is connected with the controlled end of the main switching circuit, and the switching control circuit is used for controlling the main switching circuit to disconnect the electric connection between the power input end and the power output end so as to enable the vehicle-mounted TBOX to be in a transportation mode, or controlling the main switching circuit to control the power input end to be electrically connected with the power output end so as to enable the vehicle-mounted TBOX to be in a working mode.
2. The transportation mode switching circuit of claim 1, wherein the transportation mode switching circuit further comprises:
the output end of the switching trigger circuit is connected with the controlled end of the switching control circuit, and the switching trigger circuit is used for outputting a mode switching signal to the switching control circuit when being triggered by a user so that the switching control circuit controls the main switching circuit to be switched on or switched off.
3. The transportation mode switching circuit of claim 1, wherein the transportation mode switching circuit further comprises:
the control end of the control circuit is connected with the controlled end of the switching control circuit, and the control circuit is used for outputting a transportation mode switching signal to the switching control circuit, so that the switching control circuit controls the main switch circuit to disconnect the electric connection between the power input end and the power output end, and the vehicle-mounted TBOX is in a transportation mode; or,
the control circuit is used for outputting a working mode switching signal to the switching control circuit, so that the switching control circuit controls the main switch circuit to control the power input end to be electrically connected with the power output end, and the vehicle-mounted TBOX is in a working mode.
4. The transportation mode switching circuit of claim 1, wherein the transportation mode switching circuit further comprises:
the switching trigger circuit is used for outputting a mode switching signal when triggered by a user;
the control circuit is used for outputting a transportation mode switching signal to the switching control circuit when receiving the mode switching signal, so that the switching control circuit controls the main switching circuit to disconnect the electric connection between the power input end and the power output end, and the vehicle-mounted TBOX is in a transportation mode; or,
and the control circuit is used for outputting a working mode switching signal to the switching control circuit when the mode switching signal is not received, so that the switching control circuit controls the main switching circuit to control the power input end to be electrically connected with the power output end, and the vehicle-mounted TBOX is in a working mode.
5. The transportation mode switching circuit of claim 1, wherein the switching control circuit further comprises:
and the first end of the pull-up circuit is connected with the power output end, the second end of the pull-up circuit is connected with the controlled end of the switching control circuit, and the pull-up circuit is used for pulling up the level of the controlled end of the switching control circuit.
6. The transportation mode switching circuit of claim 1, wherein the switching control circuit further comprises:
and the first end of the pull-down circuit is connected with the controlled end of the switching control circuit, the second end of the pull-down circuit is grounded, and the pull-down circuit is used for pulling down the level of the controlled end of the switching control circuit.
7. The transport mode switching circuit of claim 1, wherein the switching control circuit comprises a first resistor, a first switching tube, and a second switching tube, wherein a first end of the first resistor is connected to the power input terminal, a second end of the first resistor is connected to the first end of the first switching tube, a second end of the first switching tube is connected to the second end of the second switching tube, the first end of the second switching tube is grounded, a controlled end of the first switching tube is connected to a controlled end of the second switching tube, and both the second end of the first switching tube and the second end of the second switching tube are connected to a controlled end of the main switching circuit.
8. The transportation mode switching circuit of claim 1, wherein the transportation mode switching circuit further comprises:
the input filter circuit is arranged between the power input end and the main switch circuit in series, and the input filter circuit outputs the power after being subjected to filter processing on an accessed power;
the output filter circuit is arranged between the power output end and the main switch circuit in series, and the output filter circuit outputs the power after being subjected to filter processing with the power for output.
9. An on-board TBOX, comprising:
a battery; the method comprises the steps of,
a transportation mode switching circuit according to any one of claims 1 to 8, the power supply input of the transportation mode switching circuit being connected to the battery.
10. An automobile comprising the on-board TBOX of claim 9; or, a transportation mode switching circuit according to any one of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321080035.1U CN219668137U (en) | 2023-05-06 | 2023-05-06 | Transportation mode switching circuit, vehicle-mounted TBOX and automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321080035.1U CN219668137U (en) | 2023-05-06 | 2023-05-06 | Transportation mode switching circuit, vehicle-mounted TBOX and automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219668137U true CN219668137U (en) | 2023-09-12 |
Family
ID=87927561
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321080035.1U Active CN219668137U (en) | 2023-05-06 | 2023-05-06 | Transportation mode switching circuit, vehicle-mounted TBOX and automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219668137U (en) |
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2023
- 2023-05-06 CN CN202321080035.1U patent/CN219668137U/en active Active
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