System for simply expanding drive number of PDU system relays

Abstract

The utility model discloses a system for simply expanding the driving number of PDU system relays, which relates to the technical field of electronic engineering and comprises a first high-voltage control board, a second high-voltage control board, a positive power supply, a negative power supply, a CANH and a CANL. The first high-voltage control board and the second high-voltage control board are connected in parallel with a positive power supply and a negative power supply which are used for supplying power to the first high-voltage control board and the second high-voltage control board, power lines and CAN lines of the first high-voltage control board and the second high-voltage control board are in short circuit, and the first high-voltage control board and the second high-voltage control board send relay closing instructions through DSP chips. A peripheral circuit is matched to drive the relay sets, and DSP IO ports on the first high-voltage control board and the second high-voltage control board send driving signals to control the two relay sets respectively. The process of realizing the target is simple and reliable, and the redevelopment cost is saved by using the existing module.

Description

TECHNICAL FIELD

[0001] The utility model relates to electronic engineering technical field, concretely is a system of simple expansion PDU system relay drive number. BACKGROUND

[0002] Current new energy automobile's PDU system mostly only uses 5~8 relays, but in a few cases, 10 or more relays are required. At this time, the single board of the control relay needs to be expanded to drive to adapt to the project that needs more relays.

[0003] In the prior art, the expansion of relay drive can be realized by changing the schematic diagram and PCB of the single board of the control relay, but it consumes more time and resources, and the efficiency of using this method is obviously poor when facing a sample project with urgent delivery time and small production. Therefore, we provide a system for simply expanding the number of PDU system relay drives to solve the above problems. SUMMARY

[0004] The utility model discloses a system for simply expanding the number of PDU system relay drives to solve the problems raised in the background.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: a system for simply expanding the number of PDU system relay drives, comprising a high-voltage control board one, a high-voltage control board two, a power positive, a power negative, a CANH and a CANL. The high-voltage control board one is short-circuited to the high-voltage control board by winding. The high-voltage control board one and the high-voltage control board two are connected in parallel with the power positive and the power negative for supplying power to the high-voltage control board one and the high-voltage control board two. The power lines and the CAN lines of the high-voltage control board one and the high-voltage control board two are short-circuited.

[0006] Preferably, the high-voltage control board one and the high-voltage control board two use DSP chips to send relay closing instructions and cooperate with peripheral circuits to drive the relay group. The DSP IO ports of the high-voltage control board one and the high-voltage control board two send driving signals for controlling two relay groups respectively.

[0007] Preferably, the CAN line is connected with a BMS and a VCU. The BMS and the VCU are used to send instructions to the high-voltage control board one and the high-voltage control board two.

[0008] Preferably, the high-voltage control board one is connected with a relay one and a relay two. The high-voltage control board two is connected with a relay three and a relay four.

[0009] Preferably, the VCU is used to send closing instructions to the relay one, the relay two and the relay three and to receive the feedback status of the relay one, the relay two and the relay three in real time.

[0010] Preferably, the BMS is used to send closing instructions to the relay four, and real-time receives the state feedback of the relay four.

[0011] Preferably, the control of the relay one, the relay two, the relay three and the relay four specifically includes the following steps:

[0012] Step S1, the VCU sends closing instructions to the relay one, the relay two and the relay three, and the BMS sends closing instructions to the relay four;

[0013] Step S2, the high-voltage control board one and the high-voltage control board two drive the respective connected relays to close after receiving the instructions, and real-time receives the state feedback of the relays;

[0014] Step S3, the high-voltage control board two uploads the feedback information received by it to the CAN bus by using the internal ID, and the high-voltage control board one accepts and sorts the related information;

[0015] Step S4, after the high-voltage control board one sorts the information, the state of the relay is uploaded to the CAN bus by using the communication protocol ID recognizable by the VCU and the BMS, and the closed loop of the information sending and accepting of the VCU and the BMS is completed

[0016] Compared with the prior art, the utility model has the beneficial effects that:

[0017] The process of realizing the target is simple and reliable.

[0018] The existing module is used to save the cost of re-development. DRAWINGS

[0019] Figure 1 It is the high-voltage control board one and the high-voltage control board two parallel circuit schematic diagram in the utility model;

[0020] Figure 2 It is the VCN and BMS sending closing instruction framework diagram in the utility model;

[0021] Figure 3 It is the high-voltage control board one and the high-voltage control board two receiving instruction framework diagram in the utility model;

[0022] Figure 4 It is the high-voltage control board one and the high-voltage control board two processing feedback information framework diagram in the utility model;

[0023] Figure 5 It is the VCU and BMS information receiving information framework diagram in the utility model. CONCRETE IMPLEMENTATION

[0024] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0025] Please refer to Figures 1-5 A system for simply expanding the number of relay drives of a PDU system, comprising a high-voltage control board one (high-voltage control board 1), a high-voltage control board two (high-voltage control board 2), a power supply positive, a power supply negative, a CANH and a CANL, the high-voltage control board is short-circuited with the high-voltage control board one by winding, the high-voltage control board one and the high-voltage control board two are parallelly connected with the power supply positive and the power supply negative for supplying power to the high-voltage control board one and the high-voltage control board two, and the power supply lines and the CAN lines of the high-voltage control board one and the high-voltage control board two are short-circuited.

[0026] The high-voltage control board one and the high-voltage control board two use DSP chips to send relay closing instructions and cooperate with peripheral circuits to drive a relay group, the DSP IO ports on the high-voltage control board one and the high-voltage control board two send driving signals for respectively controlling two relay groups, the BMS and the VCU are connected on the CAN line, the BMS and the VCU are used for sending instructions to the high-voltage control board one and the high-voltage control board two, the high-voltage control board one is connected with a relay one (relay 1) and a relay two (relay 2), the high-voltage control board two is connected with a relay three (relay 3) and a relay four (relay 4), the VCU is used for sending closing instructions to the relay one, the relay two and the relay three and real-time receiving the feedback states of the relay one, the relay two and the relay three, and the BMS is used for sending closing instructions to the relay four and real-time receiving the feedback state of the relay four.

[0027] The high-voltage control board one and the high-voltage control board two need to use different programs to distinguish, to realize the normal control of the relay after parallel connection, and the high-voltage control board one and the high-voltage control board two need to carry out corresponding state feedback when the BMS and the VCU send instructions to the high-voltage control board one and the high-voltage control board two, in order to avoid the same ID data that may cause program conflict (the high-voltage control board with relay one, relay two, relay three and relay four simultaneously sends the relay state of the BMS and the VCU, two frames of data with the same BMS or VCU ID appear on the bus at the same time, and the same ID data may cause program conflict), the high-voltage control board one or the high-voltage control board two can only upload the data of one ID of the BMS or the VCU, by sending internal data frames to the CAN line, the high-voltage control board one or the high-voltage control board two can obtain the relay state obtained by each other, and after internal integration, one high-voltage control board sends BMS data alone, and the other high-voltage control board sends VCU data alone. Through the above method, the parallel high-voltage control board can realize normal data reporting.

[0028] Since the parallel high-voltage control board needs to be connected in parallel with the CAN line, the software needs to be adjusted in the whole vehicle debugging software, so that the host computer can distinguish the difference between the two high-voltage control boards, different boot programs are written into the high-voltage control board one and the high-voltage control board two before burning the application program, and the different boot programs have different IDs. When downloading the program, the application program will jump to the boot program first, then erase the application program and then re-burn. Since the boot program uses different IDs, the host computer can distinguish the high-voltage control board one and the high-voltage control board two by ID when downloading the program. By burning different boot programs in advance, the smooth burning of the high-voltage control board one and the high-voltage control board two in the debugging process can be realized.

[0029] The control relay one, relay two, relay three and relay four, specifically includes the following steps:

[0030] Step S1, the VCU sends a closing instruction to the relay one, the relay two and the relay three, and the BMS sends a closing instruction to the relay four;

[0031] Step S2, the high-voltage control board one and the high-voltage control board two drive the connected relays to close after receiving the instructions, and receive the state feedback of the relays in real time;

[0032] Step S3, the high-voltage control board two uploads the feedback information received by it to the CAN bus with an internal ID, and the high-voltage control board one receives and arranges the related information;

[0033] Step S4, after the high-voltage control board one finishes information, using VCU and BMS recognizable communication protocol ID will the state of relay upload to CAN bus, complete VCU and BMS information sending and receiving closed loop.

[0034] The process of realizing the target is simple and reliable, and the existing modules are used to save the cost of re-development.

[0035] Working principle: the VCU sends closing instruction to relay one, relay two and relay three in the utility model, and the BMS sends closing instruction to relay four; after receiving the instruction, the high-voltage control board one and the high-voltage control board two drive the relay connected to each other to close, and real-time receive the state of relay feedback; the high-voltage control board two uploads the feedback information received by it to CAN bus with internal ID, and the high-voltage control board one accepts and arranges relevant information; after the high-voltage control board one finishes information, using VCU and BMS recognizable communication protocol ID will the state of relay upload to CAN bus, complete VCU and BMS information sending and receiving closed loop.

[0036] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A system for simply expanding the number of PDU system relays, comprising high voltage control board one, high voltage control board two, power positive, power negative, CANH, and CANL, characterized in that: The high-voltage control board is short-circuited by winding mode, the high-voltage control board one and the high-voltage control board two are connected with the power supply positive and the power supply negative in parallel for supplying power to the high-voltage control board one and the high-voltage control board two, the power supply line of the high-voltage control board one and the high-voltage control board two is short-circuited with the CAN bus, and the high-voltage control board one and the high-voltage control board two are connected with CANH and CANL in parallel.

2. The system of claim 1, wherein the number of system relays driven by the simple extended PDU system is scalable. The high-voltage control board one and the high-voltage control board two use DSP chips to send relay closing instructions and cooperate with peripheral circuits to drive the relay group, and the DSP IO port of the high-voltage control board one and the high-voltage control board two sends driving signals for controlling two relay groups respectively.

3. The system of claim 1, wherein the number of system relays driven by the simple extended PDU system is: 2n - 1, where n is the number of bits in the extended PDU. The CAN line is connected with the BMS and the VCU, and the BMS and the VCU are used for sending instructions to the high-voltage control board one and the high-voltage control board two.

4. The system of claim 3, wherein the number of system relays driven by the simple extended PDU system is: The high-voltage control board one is connected with the relay one and the relay two, and the high-voltage control board two is connected with the relay three and the relay four.

5. The system of claim 3, wherein the number of system relays driven by the simple extended PDU system is: 2n - 1, where n is the number of bits in the extended PDU. The VCU is used for sending closing instructions to the relay one, the relay two and the relay three and receiving the feedback state of the relay one, the relay two and the relay three in real time.

6. The system of claim 3, wherein the number of system relays driven by the simple extended PDU system is: The BMS is used for sending closing instructions to the relay four and receiving the feedback state of the relay four in real time.

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