Intelligent low-voltage distribution box for forecabin

Abstract

The utility model discloses a forecabin intelligent low-voltage distribution box. The distribution box comprises a first control board and a second control board. The first control panel comprises a plurality of current fuses, a fuse diagnosis circuit, a plurality of relays, a relay diagnosis circuit and a male connector; the second control panel comprises a plurality of electronic fuses, a microprocessor, a communication module and a female connector; the fuse diagnosis circuit is electrically connected with each current fuse; the fuse diagnosis circuit is electrically connected with the microprocessor through the male connector and the female connector; the relay diagnosis circuit is electrically connected with the microprocessor through the male connector and the female connector; the communication module is in communication connection with the microprocessor; the microprocessor is electrically connected with each electronic fuse; the microprocessor is electrically connected with each relay through the female connector and the male connector; and the female connector is in pluggable connection with the male connector. According to the scheme, the safety protection performance of the low-voltage distribution box on the external control circuit is improved.

Description

Technical Field

[0001] The embodiment of the utility model relates to the field of power distribution technology, and in particular to a front cabin intelligent low-voltage power distribution box. Background Art

[0002] With the new round of global technological change and industrial upgrading, the automotive industry, as an integral part of the industrial landscape, is rapidly developing towards electrification, connectivity, and intelligence. New energy vehicles, in particular, have become a key driver of the global automotive industry's transformation and development. With the advancement of the internet and artificial intelligence, the functionality of new energy vehicles is becoming increasingly diverse. This increased functionality also poses certain challenges to the safety of automotive electronic systems. The front-of-house power distribution box (PDB) serves as the primary power distribution unit for the vehicle's 12V low-voltage system, impacting the functionality of the vehicle from the power supply side. Traditional PDBs are mostly plug-in type, consisting of relays and fuses. Relays control high currents with low currents, providing a degree of circuit protection and preventing high currents from directly flowing through switches and damaging the control circuits. Fuses, on the other hand, melt when the current passing through them exceeds a set value for a certain period of time, protecting the wiring harness and electrical equipment. However, failure of fuses and relays in traditional PDBs can cause the control circuits to lose control, failing to provide safety protection. Utility Model Content

[0003] The embodiment of the utility model provides a front cabin intelligent low-voltage distribution box, which improves the safety protection performance of the low-voltage distribution box to the external control circuit.

[0004] The present invention provides a front cabin intelligent low-voltage power distribution box, which includes: a first control board and a second control board; the first control board includes a plurality of current fuses, a fuse diagnostic circuit, a plurality of relays, a relay diagnostic circuit and a male connector; the second control board includes a plurality of electronic fuses, a microprocessor, a communication module and a female connector;

[0005] The fuse diagnostic circuit is electrically connected to each of the current fuses; the fuse diagnostic circuit is electrically connected to the microprocessor through the male connector and the female connector; the relay diagnostic circuit is electrically connected to the microprocessor through the male connector and the female connector;

[0006] The communication module is in communication connection with the microprocessor; the microprocessor is electrically connected with each of the electronic fuses;

[0007] The microprocessor is electrically connected to each of the relays through the female connector and the male connector;

[0008] The female connector and the male connector are pluggable and connected.

[0009] Optionally, the second control board further includes a plurality of front cabin intelligent drive modules; the microprocessor is electrically connected to each of the front cabin intelligent drive modules.

[0010] Optionally, the first control board further includes: a first power interface and a power signal detection module;

[0011] The first control board also includes a power conversion chip and a second power interface;

[0012] The first power interface and the second power interface are pluggable; the first power interface is used to receive a voltage signal from an external power module; the power conversion chip is connected to the second power interface, and the power conversion chip is electrically connected to the microprocessor;

[0013] The power signal detection module is electrically connected to the microprocessor through the male connector and the female connector;

[0014] Optionally, the power supply end of each fuse is electrically connected to an external power supply module through the first power supply interface;

[0015] The power supply end of each relay is electrically connected to the external power supply module through the first power supply interface.

[0016] Optionally, the electronic fuse includes: a normally powered electronic fuse, or an abnormally powered electronic fuse.

[0017] Optionally, the front cabin intelligent driving module includes multiple front side light driving units, a speaker driving unit, a front cabin cover unlocking driving unit and an active grille driving unit.

[0018] Optionally, the microprocessor is located in the center of the second control board.

[0019] Optionally, the microprocessor includes CYT2B98.

[0020] Optionally, the power conversion chip includes TLE9461.

[0021] In an embodiment of the present utility model, when the female connector is connected to the male connector, the fuse diagnostic circuit is electrically connected to each of the current fuses; the fuse diagnostic circuit is electrically connected to the microprocessor through the male connector and the female connector; in this way, the fuse diagnostic circuit can send fault diagnostic information of each current fuse to the microprocessor; so that the microprocessor can analyze the fault condition of the current fuse; at the same time, the microprocessor is electrically connected to each of the relays through the female connector and the male connector; the relay diagnostic circuit is electrically connected to the microprocessor through the male connector and the female connector; in this way, the microprocessor sends relay diagnostic information to each of the relays through the female connector and the male connector. control signal, each of the relays works; during the operation of each relay, the relay diagnostic circuit can send the fault diagnosis information of each relay to the microprocessor, so that the microprocessor can analyze the fault condition of each relay, thereby improving the safety protection performance of the low-voltage distribution box for the external control circuit; at the same time, the communication module is communicatively connected to the microprocessor; the microprocessor is electrically connected to each of the electronic fuses; in this way, when each fuse fails or is blown and cannot be replaced, the microprocessor receives the on-off control command of the electronic fuse through the communication module, and sends the on-off instruction to each of the electronic fuses, thereby realizing the protection of the external control circuit, thereby further improving the safety protection performance of the low-voltage distribution box for the external control circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a structural diagram of a front cabin intelligent low-voltage distribution box provided by an embodiment of the utility model;

[0023] Figure 2 This is a structural diagram of a first control board in a front cabin intelligent low-voltage distribution box provided by an embodiment of the utility model;

[0024] Figure 3 This is a structural diagram of a second control board in a front cabin intelligent low-voltage distribution box provided by an embodiment of the utility model;

[0025] Figure 4 This is a structural diagram of the second control board in another front cabin intelligent low-voltage distribution box provided by an embodiment of the utility model;

[0026] Figure 5 This is a structural schematic diagram of the first control board in another front cabin intelligent low-voltage distribution box provided by an embodiment of the present utility model. DETAILED DESCRIPTION

[0027] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0028] Figure 1 This is a structural diagram of a front cabin intelligent low-voltage distribution box provided by an embodiment of the utility model. Figure 2 This is a structural diagram of the first control board in a front cabin intelligent low-voltage distribution box provided by an embodiment of the utility model. Figure 3 This is a schematic diagram of the structure of the second control board in the front cabin intelligent low-voltage distribution box provided by the embodiment of the utility model. Figure 1-3 As shown, the distribution box 01 includes: a first control board 10 and a second control board 20; the first control board 10 includes multiple current fuses 100, a fuse diagnostic circuit 110, multiple relays 120, a relay diagnostic circuit 130 and a male connector 140; the second control board 20 includes multiple electronic fuses 200, a microprocessor 210, a communication module 220 and a female connector 230;

[0029] The fuse diagnostic circuit 110 is electrically connected to each current fuse 100; the fuse diagnostic circuit 110 is electrically connected to the microprocessor 210 through the male connector 140 and the female connector 230; the relay diagnostic circuit 130 is electrically connected to the microprocessor 210 through the male connector 140 and the female connector 230;

[0030] The communication module 220 is in communication with the microprocessor 210; the microprocessor 210 is electrically connected to each current fuse 100;

[0031] The microprocessor 210 is electrically connected to each relay 120 via the female connector 230 and the male connector 140 ;

[0032] The female connector 230 and the male connector 140 are pluggable and connected.

[0033] Among them, each current fuse 100 can play the role of realizing the wiring harness fusing protection of different current levels (5A, 10A, 20A, 30A, 40A); each relay 120 can play the role of realizing the switch control output of different current levels (5A, 7.5A, 10A, 15A, 30A); in the front cabin intelligent low-voltage distribution box, since the female connector 230 and the male connector 140 are pluggable, the front cabin intelligent low-voltage distribution box can present three different forms; when the female connector 230 and the male connector 140 are not connected, one form is a separately set first control board form, and the other form is a separately set second control board form; when the female connector 230 and the male connector 140 are connected, the first control board and the second control board are combined;

[0034] The working processes in these three modes are described below. When the female connector 230 and the male connector 140 are not connected, the fuse diagnostic circuit 110 in the separately provided first control board 10 is electrically connected to each current fuse 100. In this way, the fuse diagnostic circuit 110 can diagnose the fault information of each current fuse 100. When each relay 120 is in an operating state driven by other controllers, the relay diagnostic circuit 130 can diagnose the fault information of each relay 120. In this way, the fault status of each relay and each current fuse can be determined later, thereby improving the safety protection performance of the low-voltage distribution box for the external control circuit.

[0035] When the female connector 230 is connected to the male connector 140, the communication module 220 in the separately provided second control board 20 is in communication connection with the microprocessor 210; the microprocessor 210 is electrically connected to each current fuse 100. In this way, the microprocessor 210 receives the on / off control command for the current fuse 100 through the communication module 220, and then sends the on / off command to each current fuse 100, thereby protecting the external control circuit and avoiding the safety protection problem caused by the use of traditional current fuses when they are blown and cannot be replaced.

[0036] When the female connector 230 is connected to the male connector 140, the fuse diagnostic circuit 110 is electrically connected to each current fuse 100; the fuse diagnostic circuit 110 is electrically connected to the microprocessor 210 through the male connector 140 and the female connector 230; in this way, the fuse diagnostic circuit 110 can send the fault information of each current fuse to the microprocessor 210; so that the microprocessor 210 can analyze the fault condition of the current fuse; at the same time, the microprocessor 210 is electrically connected to each relay 130 through the female connector 230 and the male connector 140; the relay diagnostic circuit 130 is electrically connected to the microprocessor 210 through the male connector 140 and the female connector 230; in this way, the microprocessor 210 sends a relay control signal to each relay 130 through the female connector 230 and the male connector 140, and each relay The relay 120 works; during the operation of each relay 120, the relay diagnostic circuit 130 can send the fault information of each relay 120 to the microprocessor 210, so that the microprocessor 210 can analyze the fault condition of each relay 120, thereby improving the safety protection performance of the low-voltage distribution box for the external control circuit; the communication module 220 is communicatively connected to the microprocessor 210; the microprocessor 210 is electrically connected to each electronic fuse 200, so that when each current fuse fails or is blown and cannot be replaced, the microprocessor 210 receives the on-off control command of the electronic fuse 200 through the communication module 220, and then sends the on-off command to each electronic fuse 200, thereby realizing the protection of the external control circuit, thereby further improving the safety protection performance of the low-voltage distribution box for the external control circuit.

[0037] It should be noted that the model of the microprocessor 210 in this embodiment may be CYT2B98. The microprocessor 210 receives on / off control commands for the electronic fuses 200 via the communication module 220, thereby sending on / off commands to each electronic fuse 200 to put each electronic fuse 200 into an on / off operating state. While each electronic fuse 200 is in the on / off operating state, each electronic fuse 200 may feedback the fault status of each electronic fuse 200 to an external controller via the communication module 220. It is understood that the microprocessor 210 may also feedback the fault status of each current fuse 100 and the fault status of each relay 120 to the external controller via the communication module 220.

[0038] Optionally, based on the above embodiment, Figure 4 This is a structural diagram of the second control board in another front cabin intelligent low-voltage distribution box provided by the embodiment of the utility model, such as Figure 4 As shown, the second control board 20 further includes a plurality of front cabin intelligent driving modules 240 ; the microprocessor 210 is electrically connected to each front cabin intelligent driving module 240 .

[0039] Among them, considering the location and layout of the front cabin intelligent low-voltage distribution box, it is possible to consider integrating some functions of the front cabin area into the front cabin intelligent low-voltage distribution box; in this embodiment, the second control board 20 also includes multiple front cabin intelligent drive modules 240, which include multiple front side light drive units, speaker drive units, front hood unlocking drive units and active grille drive units;

[0040] Considering that the current standard external lighting requirements for the entire vehicle are low beam (rated current 5A), high beam (rated current 5A), front position light (rated current 2A), daytime running light (rated current 2A), and front fog light (rated current 2A), according to the requirements, the multiple front side light driver units of this solution can include BTS7008-2 and BTS7080-2; BTS7008-2 is adapted to the requirement of rated current 5A; BTS7080-2 is adapted to the requirement of rated current 2A. Specifically, the microprocessor 210 is electrically connected to multiple front side light driving units. When the microprocessor 210 receives the front cabin area light control command through the communication module 220, the microprocessor 210 sends the corresponding high level to the channel control pin of BTS7008-2 or BTS7080-2 through the GPIO interface; at the same time, the diagnostic feedback pin of BTS7008-2 or BTS7080-2 will upload the voltage value to the microprocessor 210. The microprocessor 210 can judge whether the channel is short-circuited or open-circuited based on the voltage value, and feedback the corresponding status to the external controller through the communication module 220.

[0041] Considering that the rated current requirement of the vehicle horn is generally 10A, the horn drive unit of this solution can select BTS7008-1; specifically, the microprocessor 210 is electrically connected to the horn drive unit. When the microprocessor 210 receives the front cabin area horn control command through the communication module 220, the microprocessor 210 sends the corresponding high level to the control pin of BTS7008-1 through the GPIO interface; at the same time, the diagnostic feedback pin of BTS7008-1 will upload the voltage value to the microprocessor 210. The microprocessor 210 can determine whether the channel is short-circuited or open-circuited based on the voltage value, and feedback the corresponding status to the external controller through the communication module 220.

[0042] Considering that the rated current requirement for unlocking the front hood of the entire vehicle is generally 5A, the front hood unlocking drive unit of this solution can select BTS7040-1; specifically, the microprocessor 210 is electrically connected to the front hood unlocking drive unit. When the microprocessor 210 receives the front cabin area unlocking control command through the communication module 220, the microprocessor 210 sends the corresponding high level to the control pin of BTS7040-1 through the GPIO interface; at the same time, the diagnostic feedback pin of BTS7040-1 will upload the voltage value to the microprocessor 210. The microprocessor 210 can judge whether the channel is short-circuited or open-circuited based on the voltage value, and feedback the corresponding status to the external controller through the communication module.

[0043] In addition, considering that the rated current requirement of the active grille of the entire vehicle is generally 1A, the active grille drive unit of this solution can select DRV3245; specifically, the microprocessor 210 is electrically connected to the active grille drive unit. When the microprocessor 210 receives the active grille control command of the front cabin area through the communication module 220, the microprocessor 210 sends the corresponding high level to the control pin of DRV3245 through SPI; at the same time, the diagnostic feedback pin of DRV3245 will upload the voltage value to the microprocessor 210, and the microprocessor 210 can judge whether the channel is short-circuited or open-circuited based on the voltage value, and feedback the corresponding status to the external controller through the communication module 220.

[0044] Of course, it is understandable that the front cabin intelligent driving module 240 also includes other intelligent driving units, and this embodiment does not make specific limitations on this.

[0045] Optionally, based on the above embodiment, Figure 5 This is a structural diagram of the first control board in another front cabin intelligent low-voltage distribution box provided by the embodiment of the utility model, referring to Figure 4-5 The first control board 10 further includes: a first power interface 150 and a power signal detection module 160; the second control board 20 further includes a power conversion chip 250 and a second power interface 260;

[0046] The first power interface 150 and the second power interface 260 are pluggable; the first power interface 150 is used to receive the voltage signal of the external power module; the power conversion chip 250 is connected to the second power interface 260, and the power conversion chip 250 is electrically connected to the microprocessor 210; the power signal detection module 160 is electrically connected to the microprocessor 210 through the female connector 140 and the male connector 230.

[0047] The power conversion chip 250 includes a TLE9461. The external power module can send a power signal to the power conversion chip 250 through the first power interface 150 and the second power interface 260. The power conversion chip 250 provides an operating voltage for the microprocessor 210 after a certain voltage reduction process. At the same time, the power signal detection module 160 can collect the voltage value, current value, and temperature input to the first power interface 150 by the external power module. The microprocessor 210 can read the voltage value, current value, and temperature detected by the power signal detection module 160 through the male connector 230 and the female connector 140. The read voltage can be used for overvoltage or undervoltage diagnosis; the read current can be used for overcurrent protection and vehicle power consumption statistics; and the read temperature can be used for overtemperature detection, thereby achieving power input measurement and protection for the entire distribution box.

[0048] Optional, continue to refer to Figure 5 The power supply end of each current fuse 100 is electrically connected to the external power module through the first power interface 150; the power supply end of each relay 130 is electrically connected to the external power module through the first power interface 150. The external power module can provide operating voltage for each current fuse 100 and each relay 130.

[0049] Optional, continue to refer to Figure 5 The electronic fuse 200 includes: a normally powered electronic fuse or an abnormally powered electronic fuse.

[0050] The normally powered electronic fuse is an electronic fuse that receives a control command to turn on the electronic fuse 200 via the communication module 220 when the microprocessor 210 is in normal operation and can supply current to the outside. An exemplary example of the normally powered electronic fuse is the BTG70013A-1ESW. The emergency power electronic fuse is an electronic fuse that receives a control command to turn on the electronic fuse 200 via the communication module 220 when the microprocessor 210 is in a dormant state and can supply current to the outside. An exemplary example of the emergency power electronic fuse is the BTS72220-4ESP. When the load current is high, the microprocessor 210 is in normal operation and receives a control command to turn off the electronic fuse 200 via the communication module 220, thereby sending a disconnect instruction to the normally powered electronic fuse or the emergency power electronic fuse, thereby protecting the external control circuit.

[0051] Note that the above are merely preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions are possible for those skilled in the art without departing from the scope of protection of the present invention. Therefore, while the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the scope of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A front cabin intelligent low-voltage distribution box, characterized in that: include: A first control board and a second control board; the first control board includes a plurality of current fuses, a fuse diagnostic circuit, a plurality of relays, a relay diagnostic circuit and a male connector; the second control board includes a plurality of electronic fuses, a microprocessor, a communication module and a female connector; The fuse diagnostic circuit is electrically connected to each of the current fuses; the fuse diagnostic circuit is electrically connected to the microprocessor through the male connector and the female connector; the relay diagnostic circuit is electrically connected to the microprocessor through the male connector and the female connector; The communication module is in communication connection with the microprocessor; the microprocessor is electrically connected with each of the electronic fuses; The microprocessor is electrically connected to each of the relays through the female connector and the male connector; The female connector and the male connector are pluggable and connected.

2. The front cabin intelligent low-voltage distribution box according to claim 1, characterized in that: The second control board also includes a plurality of front cabin intelligent drive modules; the microprocessor is electrically connected to each of the front cabin intelligent drive modules.

3. The front cabin intelligent low-voltage distribution box according to claim 1, characterized in that: The first control board also includes: a first power interface and a power signal detection module; The first control board also includes a power conversion chip and a second power interface; The first power interface and the second power interface are pluggable; the first power interface is used to receive a voltage signal from an external power module; the power conversion chip is connected to the second power interface, and the power conversion chip is electrically connected to the microprocessor; The power signal detection module is electrically connected to the microprocessor through the male connector and the female connector.

4. The front cabin intelligent low-voltage distribution box according to claim 3, characterized in that: The power supply end of each fuse is electrically connected to the external power supply module through the first power supply interface; The power supply end of each relay is electrically connected to the external power supply module through the first power supply interface.

5. The front cabin intelligent low-voltage distribution box according to claim 1, characterized in that: The electronic fuse includes: a normally powered electronic fuse or an abnormally powered electronic fuse.

6. The front cabin intelligent low-voltage distribution box according to claim 2, characterized in that: The front cabin intelligent drive module includes multiple front side light drive units, a speaker drive unit, a front cabin cover unlocking drive unit and an active grille drive unit.

7. The front cabin intelligent low-voltage distribution box according to claim 1, characterized in that: The microprocessor includes CYT2B98.

8. The front cabin intelligent low-voltage distribution box according to claim 3, characterized in that: The power conversion chip includes TLE9461.

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