CN219892942U - Device with overload protection function and vehicle - Google Patents
Device with overload protection function and vehicle Download PDFInfo
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- CN219892942U CN219892942U CN202321304383.2U CN202321304383U CN219892942U CN 219892942 U CN219892942 U CN 219892942U CN 202321304383 U CN202321304383 U CN 202321304383U CN 219892942 U CN219892942 U CN 219892942U
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- 238000012423 maintenance Methods 0.000 description 2
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Abstract
The utility model discloses a device with overload protection and a vehicle, comprising: the device comprises a controller, a power supply module and a sub-control loop; the sub-control loop comprises a bridge circuit, a response capacitor, a switching element and a temperature control module, wherein the power supply module is configured to supply power to the controller and the bridge circuit to supply power current, and the temperature control module is configured to: when the power supply current output by the bridge circuit is lower than or higher than a threshold value, the on-off circuit is executed to supply power to the connector; the strike capacitance is configured to: storing the power supply current as storage current, transmitting the storage current to the switching element through the bridge circuit to form a power supply sub-loop, and when the temperature control module breaks the circuit, conducting the power supply sub-loop; the controller is configured to: when the power supply sub-loop is on, the control switch element is off. According to the utility model, a switching element and a temperature control module are added in the circuit, and when the current exceeds a threshold value, the control module breaks the circuit to protect the circuit.
Description
Technical Field
The utility model relates to the technical field of connectors, in particular to a device with overload protection and a vehicle.
Background
Along with the development of the field of new energy electric automobiles, the application proportion of the high-voltage electric connector on the automobile is higher and higher, the safety and the reliability of connector connection are also more and more concerned, along with the development of the field of new energy automobiles, the application proportion of the high-voltage electric connector on the automobile is higher and higher, the electric automobile is more and more widely developed, and a power battery system is an important component part of the electric automobile. The connector serves as a key use component of the power battery system and serves as a connecting device for transmitting high voltage and large current. As the connector is widely applied to the power battery system, the safety and reliability of the connector are also more and more concerned, and the protection of the whole current loop is also more and more important, as the circuit is more and more complex, the demand of the deconcentrator is more urgent, and the circuit loop is also more required to have a protection mechanism, so that the deconcentrator with the deconcentrator protection function has become a necessary trend.
At present, the general circuit branching protection adopts common fuse connection to protect the loop of the whole circuit, and because the fuse is of a single structure, the fuse needs to be installed in a high-voltage control box, so that the installation space of the fuse in a power battery system is increased, the cost is increased, and the space utilization rate of the power battery system is reduced. Also, since the installation and the removal of the fuse mounted to the high voltage control box are complicated, maintainability of a circuit of the power battery system is poor.
Therefore, it is necessary to design a device with overload protection.
Disclosure of Invention
An object of the present utility model is to provide an apparatus with overload protection and a vehicle for solving the problems of low space utilization of a battery system, complicated installation and removal of fuses mounted to a high voltage control box, and poor maintainability of a circuit of a power battery system. The utility model provides a device with overload protection, which comprises a controller, a power supply module and a sub-control loop;
the controller is connected with at least one sub-control loop, each sub-control loop is connected with a connector,
the sub-control loop comprises a bridge circuit, a surge capacitor, a switching element and a temperature control module,
the output end of the power supply module is respectively connected with the input end of the controller and the input end of the bridge circuit and is configured to respectively supply power to the controller and supply power current to the bridge circuit,
the bridge circuit is connected with the impact capacitor in parallel, the switch element is connected between the bridge circuit and the impact capacitor after being connected with the temperature control module in parallel, and the temperature control module is configured to: when the power supply current output by the bridge circuit is lower than a threshold value, conducting a circuit between the power supply module and the connector to supply power to the connector, and when the power supply current output by the bridge circuit is higher than the threshold value, disconnecting the circuit between the power supply module and the connector to stop supplying power to the connector;
the strike capacitance is configured to: storing the power supply current as a storage current, transmitting the storage current to the switch element through the bridge circuit to form a power supply sub-loop, and conducting the power supply sub-loop when the temperature control module breaks the circuit;
the controller output is connected to the input of the switching element and configured to:
when the power supply sub-loop is conducted, the switching element is controlled to be disconnected,
when the power supply current output by the bridge circuit is lower than the threshold value again, the temperature control module conducts a circuit between the power supply module and the connector to supply power for the connector, and the controller controls the switching element to be turned on again.
Further, the temperature control module is a cement resistor, and a temperature fuse is arranged in the cement resistor.
Further, the temperature control module comprises a resistor and a fuse which are connected in series, wherein the output end of the bridge circuit is connected with the input end of the resistor, and the output end of the fuse is connected with the input end of the connector.
Further, the fuse is a ceramic fuse.
Further, the bridge circuit includes a first diode D1, a second diode D2, a third diode D3 and a fourth diode D4, where the first diode D1 and the second diode D2 are connected in series to form a first loop, the third diode D3 and the fourth diode D4 are connected in series to form a second loop, the first loop is connected in parallel with the second loop, a negative electrode of the second diode D2 is connected with an anode of the first diode D1, and a negative electrode of the fourth diode D4 is connected with an anode of the third diode D3.
Further, the output end of the power supply module is respectively connected with the positive electrode of the first diode D1 and the positive electrode of the third diode D3, the connection point of the negative electrode of the first diode D1 and the negative electrode of the third diode D3 is respectively connected with the input end of the switching element and the input end of the temperature control module, and the connection point of the positive electrode of the second diode D2 and the positive electrode of the fourth diode D4 is connected with the second end of the impact capacitor.
Further, the switching element is an insulated gate bipolar transistor or a thyristor.
Further, the device further comprises a shell, wherein the bridge circuit, the temperature control module, the impact capacitor and the switch element are all arranged in the shell.
Furthermore, the shell is made of metal or a shielding layer is arranged in the shell, and the shielding layer wraps the device with overload protection and is grounded.
The utility model also provides a vehicle, comprising a battery pack and any device with overload protection as described above, wherein the output end of the battery pack is connected with the input end of the power supply module and is configured to: and supplying power to the power supply module.
The beneficial effects of the utility model are as follows:
1. the utility model provides a take overload protection's device, controller connection divide the control circuit, and every divides the control circuit all to connect the connector, and power module is furnished for the controller power supply and provides the supply current for the bridge circuit, and the control by temperature change module is configured as: when the power supply current output by the bridge circuit is lower than or higher than a threshold value, the circuit between the power supply module and the connector is conducted or disconnected, and the power supply for the connector is started or stopped; the power supply circuit comprises a bridge circuit, a temperature control module, a controller, a power supply sub-loop, a switch element, a power supply sub-loop and a power supply sub-loop.
The device with overload protection realizes current limiting of the connectors corresponding to the split control loop, when the current power limit is exceeded, the temperature control module can disconnect the output of the split branch, so that the occurrence of short circuit faults and self-ignition of line damage is reduced, the maintenance times are reduced, the practical service life of the line is prolonged, and meanwhile, the vehicle body wiring harness system is not required to be disassembled and maintained under most conditions.
2. The device with overload protection provided by the utility model can shield electromagnetic interference to the outside when being electrified under the condition of ensuring smaller size, meanwhile, a complex connecting structure is eliminated, the cost is reduced, the weight is reduced, an intelligent branching protection solution is provided for a special vehicle, the device has relatively smaller volume, the connecting structure is simplified, and more abundant design space is provided for the design of a vehicle body.
Other features of the present utility model and its advantages will become apparent from the following detailed description of exemplary embodiments of the utility model, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description, serve to explain the principles of the utility model.
FIG. 1 is a block diagram of an apparatus with overload protection according to the present utility model;
fig. 2 is a schematic structural view of a device and a housing with overload protection according to the present utility model.
The figures are marked as follows:
1-controller, 2-power module, 3-connector, 4-resistor, 5-switching element, 6-fuse, 7-strike capacitor, 12-casing, D1-first diode, D2-second diode, D3-third diode, D4-fourth diode.
Detailed Description
Various exemplary embodiments of the present utility model will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise.
The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses.
Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of exemplary embodiments may have different values.
The device with overload protection comprises a controller 1, a power supply module 2 and a sub-control loop, wherein the controller is shown in fig. 1-2;
the controller is connected with at least one sub-control loop, each sub-control loop is connected with a connector 3,
the sub-control loop comprises a bridge circuit, a capacitor 7 for the power supply, a switch element 5 and a temperature control module,
the output end of the power supply module 2 is respectively connected with the input end of the controller 1 and the input end of the bridge circuit and is configured to respectively supply power to the controller 1 and supply power current to the bridge circuit,
the bridge circuit is connected in parallel with the impact capacitor 7, the switching element 5 is connected between the bridge circuit and the impact capacitor 7 after being connected in parallel with the temperature control module, and the temperature control module is configured to: when the power supply current output by the bridge circuit is lower than a threshold value, conducting a circuit between the power supply module 2 and the connector 3 to supply power to the connector 3, and when the power supply current output by the bridge circuit is higher than the threshold value, disconnecting the circuit between the power supply module 2 and the connector 3 to stop supplying power to the connector 3;
the strike capacitance 7 is configured to: storing the power supply current as a storage current, and transmitting the storage current to the switching element 5 through the bridge circuit to form a power supply sub-loop, wherein the power supply sub-loop is conducted when the temperature control module breaks the circuit;
the output of the controller 1 is connected to the input of the switching element 5 and is configured to:
when the power supply sub-loop is on, the switching element 5 is controlled to be off,
when the supply current output by the bridge circuit is lower than the threshold again, the temperature control module conducts the circuit between the power supply module 2 and the connector 3 to supply power to the connector 3, and the controller 1 controls the switching element 5 to be turned on again.
Along with the development of the field of new energy electric vehicles, the application proportion of the high-voltage electric connector on the vehicles is higher and higher, the safety and reliability of the connection of the connector 3 are also more and more concerned, along with the development of the field of the new energy electric vehicles, the application proportion of the high-voltage electric connector on the vehicles is higher and higher, the electric vehicles are more and more widely developed, and the power battery system is an important component part of the electric vehicles. The connector serves as a key use component of the power battery system and serves as a connecting device for transmitting high voltage and large current. As the connector 3 is widely used in the power battery system, the safety and reliability of the connector are also more and more concerned, and the protection of the whole current loop is also more and more important, as the circuit is more and more complex, the demand of the deconcentrator is more urgent, and the circuit loop is also more required to have a protection mechanism, so that the deconcentrator with the deconcentrator protection function has become a necessary trend.
At present, the general circuit branching protection adopts common fuse connection to protect the loop of the whole circuit, and because the fuse is of a single structure, the fuse needs to be installed in a high-voltage control box, so that the installation space of the fuse in a power battery system is increased, the cost is increased, and the space utilization rate of the power battery system is reduced. Also, since the installation and the removal of the fuse mounted to the high voltage control box are complicated, maintainability of a circuit of the power battery system is poor.
The utility model provides a device with overload protection, a controller 1 is connected with sub-control loops, each sub-control loop is connected with a connector 3, a power supply module 2 is configured to supply power to the controller 1 and supply power current to a bridge circuit, and when the power supply current output by the bridge circuit is lower than a threshold value, a temperature control module performs conduction of a circuit between the power supply module 2 and the connector 3 to supply power to the connector 3; when the power supply current output by the bridge circuit is higher than the threshold value, the temperature control module executes the circuit between the power supply module 2 and the connector 3 to stop supplying power to the connector 3; when the temperature control module turns off the circuit, the impact capacitor 7 can store the power supply current as storage current, the storage current is transmitted to the switching element 5 through the bridge circuit, when the storage current flows through the switching element 5, the controller 1 controls sensing of the storage current signal, controls the switching element 5 to be turned off, when the circuit temperature of the output end of the bridge circuit reaches a set requirement, the power supply current output by the bridge circuit is lower than a threshold value again, the temperature control module conducts the circuit between the power supply module 2 and the connector 3 to supply power for the connector 3, and the controller 1 controls the switching element 5 to be turned on again.
The connector 3 corresponding to the split control loop is limited by current and current, when the current and power limit is exceeded, the temperature control module can disconnect the output of the split branch, so that the occurrence of short circuit faults and self-ignition caused by line damage is reduced, the maintenance times are reduced, the service life of the line is prolonged, and meanwhile, the vehicle body wiring harness system is not required to be disassembled and maintained under most conditions.
In some embodiments, the temperature control module is a cement resistor with a built-in temperature fuse.
The cement resistor is made up by winding resistor wire on non-alkaline heat-resistant porcelain, adding heat-resistant, moisture-resistant and corrosion-resistant material to protect and fix the resistor wire, putting the wound resistor wire into square porcelain frame, and filling and sealing with special incombustible heat-resistant cement. The outside of the cement resistor is mainly made of ceramic materials.
The cement resistor has the characteristics of shock resistance, moisture resistance, heat resistance, good heat dissipation, low price and the like, is excellent in heat resistance, small in resistance temperature coefficient, resistant to short-time overload and low in noise, has no change in resistance value over the years, and has good explosion-proof performance, and the cement resistor can better play a role in protecting a circuit.
In some embodiments, the temperature control module comprises a resistor 4 and a fuse 6 connected in series with each other, the output of the bridge circuit is connected to the input of the resistor 4, and the output of the fuse 6 is connected to the input of the connector 3.
The fuse 6 is connected with the resistor 4 in a thermal coupling way to form a temperature control module, when the temperature control module works normally, the temperature of the resistor 4 is normal when the power supply current output by the bridge circuit is lower than a threshold value, the fuse 6 is conducted to supply power to the subsequent connector 3, when the power supply current output by the bridge circuit is higher than the threshold value, the resistor 4 generates abnormal heating, and after the fuse 6 detects the abnormal heating, the circuit is disconnected to stop supplying power to the connector 3.
In some embodiments, the fuse 6 is a ceramic fuse.
The ceramic fuse has good heat dissipation function and explosion resistance, is usually used for a circuit with larger current, has higher mechanical strength, can bear larger external force impact, has longer service life, and can sense the temperature of the circuit and increase the temperature when the current exceeds a threshold value because the ceramic fuse is a temperature fuse, the ceramic fuse automatically breaks the circuit to protect the connector 3 from being damaged, and can sense the temperature of the circuit when the current is lower than the threshold value, and the ceramic fuse automatically conducts the circuit to supply power for the subsequent connector 3.
In some embodiments, the bridge circuit includes a first diode D1, a second diode D2, a third diode D3, and a fourth diode D4, where the first diode D1 and the second diode D2 are connected in series to form a first loop, the third diode D3 and the fourth diode D4 are connected in series to form a second loop, the first loop is connected in parallel with the second loop, a negative electrode of the second diode D2 is connected with a positive electrode of the first diode D1, and a negative electrode of the fourth diode D4 is connected with a positive electrode of the third diode D3.
The bridge circuit has the advantages of simplicity and high efficiency, so that the bridge circuit is widely applied to electric automobile circuits in practice.
In some embodiments, the output end of the power supply module 2 is connected to the positive electrode of the first diode D1 and the positive electrode of the third diode D3, the connection point between the negative electrode of the first diode D1 and the negative electrode of the third diode D3 is connected to the input end of the switching element 5 and the input end of the temperature control module, and the connection point between the positive electrode of the second diode D2 and the positive electrode of the fourth diode D4 is connected to the second end of the impact capacitor 7.
The power supply module 2 provides power for the temperature control module through the first diode D1 and the third diode D3, and further provides power for the connector 3; when the temperature control module is disconnected, the impact capacitor 7 stores the power supply current as a storage current, the storage current firstly flows through the second diode D2 and the fourth diode D4, and then the storage current is transmitted to the switching element 5 through the first diode D1 and the third diode D3 to conduct the power supply sub-loop.
In some embodiments, the switching element 5 is an insulated gate bipolar transistor or a thyristor.
Insulated gate bipolar Transistor (insulator-Gate Bipolar Transistor-IGBT) combines the advantages of Power Transistor (Giant Transistor-GTR) and Power field effect Transistor (Power MOSFET), and has good characteristics and wide application fields. The silicon controlled rectifier (Silicon Controlled Rectifier) is called SCR for short, and is a high-power electrical element, also called thyristor. The automatic control system has the advantages of small volume, high efficiency, long service life and the like, and can be used as a high-power driving device in an automatic control system to control high-power equipment by using a low-power control.
In some embodiments, the bridge circuit, the temperature control module, the strike capacitance 7, and the switching element 5 are all disposed within the housing 12.
The bridge circuit, the temperature control module, the impact capacitor 7 and the switch element 5 are all arranged in the shell 12, the overall size of the device with the overload protection of the shell 12 is smaller, and meanwhile, a complex connecting structure is eliminated, so that the cost is reduced, and the weight is reduced.
In some embodiments, the housing 12 is made of metal or a shielding layer is disposed in the housing 12, and the shielding layer wraps the overload protection device and is grounded.
The shell 12 is made of metal, so that good structural strength can be guaranteed, the shell 12 made of metal has a shielding effect, electromagnetic interference to the outside can be shielded when the power is on, electromagnetic interference in the device can be effectively shielded, and electromagnetic interference to other equipment is reduced. Or in some embodiments, a shielding layer is arranged in the shell 12, the shielding layer wraps the overload protection device and is grounded, so that the overload protection device can shield electromagnetic interference to the outside when being electrified, electromagnetic interference in the device can be effectively shielded, electromagnetic interference to other equipment is reduced, and the shielding layer is grounded to effectively shield the electromagnetic interference, so that the shielding effect is ensured.
The utility model also provides a vehicle comprising a battery pack and any device with overload protection as described above, wherein the output end of the battery pack is connected with the input end of the power supply module 2 and is configured to: supplying power to the power supply module 2.
While certain specific embodiments of the utility model have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the utility model. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the utility model. The scope of the utility model is defined by the appended claims.
Claims (10)
1. An apparatus with overload protection, comprising: the device comprises a controller, a power supply module and a sub-control loop;
the controller is connected with at least one sub-control loop, each sub-control loop is connected with a connector,
the sub-control loop comprises a bridge circuit, a surge capacitor, a switching element and a temperature control module,
the output end of the power supply module is respectively connected with the input end of the controller and the input end of the bridge circuit and is configured to respectively supply power to the controller and supply power current to the bridge circuit,
the bridge circuit is connected with the impact capacitor in parallel, the switch element is connected between the bridge circuit and the impact capacitor after being connected with the temperature control module in parallel, and the temperature control module is configured to: when the power supply current output by the bridge circuit is lower than a threshold value, conducting a circuit between the power supply module and the connector to supply power to the connector, and when the power supply current output by the bridge circuit is higher than the threshold value, disconnecting the circuit between the power supply module and the connector to stop supplying power to the connector;
the strike capacitance is configured to: storing the power supply current as a storage current, transmitting the storage current to the switch element through the bridge circuit to form a power supply sub-loop, and conducting the power supply sub-loop when the temperature control module breaks the circuit;
the controller output is connected to the input of the switching element and configured to:
when the power supply sub-loop is conducted, the switching element is controlled to be disconnected,
when the power supply current output by the bridge circuit is lower than the threshold value again, the temperature control module conducts a circuit between the power supply module and the connector to supply power for the connector, and the controller controls the switching element to be turned on again.
2. An apparatus with overload protection as claimed in claim 1, wherein: the temperature control module is a cement resistor, and a temperature fuse is arranged in the cement resistor.
3. An apparatus with overload protection as claimed in claim 1, wherein: the temperature control module comprises a resistor and a fuse which are connected in series, wherein the output end of the bridge circuit is connected with the input end of the resistor, and the output end of the fuse is connected with the input end of the connector.
4. A device with overload protection as claimed in claim 3, wherein: the fuse is a ceramic fuse.
5. An apparatus with overload protection as claimed in claim 1, wherein: the bridge circuit comprises a first diode D1, a second diode D2, a third diode D3 and a fourth diode D4, wherein the first diode D1 and the second diode D2 are connected in series to form a first loop, the third diode D3 and the fourth diode D4 are connected in series to form a second loop, the first loop is connected with the second loop in parallel, the cathode of the second diode D2 is connected with the anode of the first diode D1, and the anode of the fourth diode D4 is connected with the anode of the third diode D3.
6. An apparatus with overload protection as claimed in claim 5, wherein: the output end of the power supply module is respectively connected with the positive electrode of the first diode D1 and the positive electrode of the third diode D3, the connection point of the negative electrode of the first diode D1 and the negative electrode of the third diode D3 is respectively connected with the input end of the switching element and the input end of the temperature control module, and the connection point of the positive electrode of the second diode D2 and the positive electrode of the fourth diode D4 is connected with the second end of the response capacitor.
7. An apparatus with overload protection as claimed in claim 1, wherein: the switching element is an insulated gate bipolar transistor or a thyristor.
8. An apparatus with overload protection as claimed in claim 1, wherein: the bridge circuit, the temperature control module, the impact capacitor and the switch element are all arranged in the shell.
9. The apparatus with overload protection as claimed in claim 8, wherein: the shell is made of metal or is internally provided with a shielding layer, and the shielding layer wraps the device with overload protection and is grounded.
10. A vehicle comprising a battery pack and an apparatus with overload protection as claimed in any one of claims 1 to 9, characterized in that: the battery pack output end is connected with the power supply module input end and is configured to: and supplying power to the power supply module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321304383.2U CN219892942U (en) | 2023-05-26 | 2023-05-26 | Device with overload protection function and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321304383.2U CN219892942U (en) | 2023-05-26 | 2023-05-26 | Device with overload protection function and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219892942U true CN219892942U (en) | 2023-10-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321304383.2U Active CN219892942U (en) | 2023-05-26 | 2023-05-26 | Device with overload protection function and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219892942U (en) |
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2023
- 2023-05-26 CN CN202321304383.2U patent/CN219892942U/en active Active
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