CN210707274U

CN210707274U - BDU controller, BDU and vehicle

Info

Publication number: CN210707274U
Application number: CN201921768509.5U
Authority: CN
Inventors: 王海星
Original assignee: Beijing CHJ Automobile Technology Co Ltd
Current assignee: Beijing CHJ Automobile Technology Co Ltd
Priority date: 2019-10-21
Filing date: 2019-10-21
Publication date: 2020-06-09
Anticipated expiration: 2029-10-21

Abstract

The utility model provides a BDU controller, a BDU and a vehicle; the BDU controller comprises a control circuit and a battery parameter sampling circuit, and the control circuit is connected with the battery parameter sampling circuit; the control circuit is used for being connected with an upper power executing device and a lower power executing device in the BDU and the battery management unit BMU respectively. The utility model provides a technical scheme has solved current BDU and has not solitary controller, is connected to BMU through the pencil usually, leads to the pencil more, the comparatively loaded down with trivial details problem of wiring.

Description

BDU controller, BDU and vehicle

Technical Field

The utility model relates to the technical field of vehicles, especially, relate to a BDU controller, BDU and vehicle.

Background

Currently, new energy vehicles represented by electric vehicles have become an important direction for the development of the automobile industry, and electric vehicles have gradually entered the lives of people. A power battery system of a new energy automobile is one of the most critical parts in the whole automobile parts and the parts with the highest requirement on safety. The Battery Disconnection Unit (BDU) is used as a device for disconnecting and connecting high voltage electricity of a new energy automobile power Battery, and plays an important role in the safety of a Battery pack. However, most existing BDUs do not have a separate controller, but are usually connected to a Battery Management Unit (BMU) through a wire harness, which results in a large number of wire harnesses and complicated wiring.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a BDU controller, BDU and vehicle to solve current BDU and do not have solitary controller, be connected to BMU through the pencil usually, lead to the pencil more, the comparatively loaded down with trivial details problem of wiring.

In order to solve the above problem, the utility model discloses a realize like this:

in a first aspect, an embodiment of the present invention provides a BDU controller, including a control circuit and a battery parameter sampling circuit, where the control circuit is connected to the battery parameter sampling circuit;

the control circuit is used for being connected with an upper power executing device and a lower power executing device in the BDU and the battery management unit BMU respectively.

Optionally, the control circuit includes a micro control unit and a system base chip SBC circuit, the micro control unit is connected to the SBC circuit and the battery parameter sampling circuit, and the SBC circuit is connected to the power on/off actuator and the BMU, respectively.

Optionally, the BDU controller further includes an analog-to-digital converter, the battery parameter sampling circuits are both connected to a first end of the analog-to-digital converter, and a second end of the analog-to-digital converter is connected to the micro control unit.

Optionally, the battery parameter sampling circuit includes a current sampling circuit, a voltage sampling circuit, and a temperature sampling circuit, and the current sampling circuit, the voltage sampling circuit, and the temperature sampling circuit are all connected to the first end of the analog-to-digital converter.

Optionally, the current sampling circuit includes a shunt resistor and a programmable gain amplifier PGA, a first end of the PGA is connected to the shunt resistor, and a second end of the PGA is connected to the analog-to-digital converter.

Optionally, the voltage sampling circuit includes a sampling resistor and a first operational amplifier, a first end of the first operational amplifier is connected to the sampling resistor, and a second end of the first operational amplifier is connected to the analog-to-digital converter.

Optionally, the temperature sampling circuit includes a thermistor and a second operational amplifier, a first end of the second operational amplifier is connected to the thermistor, and a second end of the second operational amplifier is connected to the analog-to-digital converter.

Optionally, the BDU controller further includes a pre-charge circuit, the pre-charge circuit includes a pre-charge resistor and a first MOS transistor, a first end of the first MOS transistor is connected to the micro-control unit, and a second end of the first MOS transistor is connected to the pre-charge resistor.

Optionally, the BDU controller further comprises a fault trigger circuit, the fault trigger circuit being connected to the micro control unit.

In a second aspect, the embodiment of the present invention further provides a BDU, including upper and lower electricity executive device and as in any one of the first aspect BDU controller, upper and lower electricity executive device includes main positive relay, main negative relay, charge positive relay and charge negative relay, main positive relay main negative relay charge positive relay with charge negative relay all with control circuit connects.

Optionally, the power on/off actuator further includes at least one reserved relay interface, and the at least one reserved relay interface is connected to the control circuit.

In a third aspect, embodiments of the present invention further provide a vehicle including the BDU according to any one of the second aspects.

The utility model provides a technical scheme is through being in the same place control circuit and battery parameter sampling circuit integration to form the BDU controller, come to be connected respectively with the last lower electricity executive device and the BMU in the BDU through the control circuit in the BDU controller again. Compared with the prior art, battery parameter sampling circuit and BDU inside power-on and power-off executive device are connected with the BMU separately respectively, the BDU controller that this embodiment provided can integrate above-mentioned each sampling circuit together, come to realize control function to BDU interior power-on and power-off executive device through the BDU controller, reduced battery parameter sampling circuit and BMU and with BDU inside power-on and power-off executive device between walk the line and to inserting the connector, the pencil cost is reduced for the pencil arranges more simply.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 is a structure diagram of a BDU controller connected to a BDU provided by an embodiment of the present invention

Fig. 2 is a structural diagram of another BDU controller connected to a BDU according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The embodiment of the utility model provides a BDU controller, please refer to fig. 1, the BDU controller includes control circuit 10 and battery parameter sampling circuit 102, control circuit 10 with battery parameter sampling circuit 102 is connected; the control circuit 10 is connected to the upper and lower power actuators 20 and the battery management unit BMU30 in the BDU, respectively.

In this embodiment, the control circuit and the battery parameter sampling circuit are integrated together to form a BDU controller, and then the BDU controller is connected to the upper and lower electrical actuators 20 and the BMU30 in the BDU through the control circuit 10 in the BDU controller. Compared with the prior art, battery parameter sampling circuit and BDU inside power-on/power-off executive device 20 are connected with BMU30 separately respectively, the BDU controller that this embodiment provided can integrate above-mentioned each sampling circuit together, come to realize the control function to BDU interior power-on/power-off executive device 20 through the BDU controller, the wiring and the plug-in connector between power-on/power-off executive device 20 about having reduced battery parameter sampling circuit and BMU30 and BDU inside, the pencil cost is reduced for the pencil arranges more simply.

Referring to fig. 2 specifically, in the embodiment provided in fig. 2, the control circuit includes a micro control unit 12 and an SBC circuit 11, and both the SBC circuit 11 and the battery parameter sampling circuit are connected to the micro control unit 12; the SBC circuit 11 is connected to the upper and lower electric actuators 20 and the BMU in the BDU, respectively.

The embodiment of the utility model provides an in, the BDU controller includes little the control Unit 12, SBC circuit 11 and battery parameter sampling circuit 102, and then after the BDU controller is gone up the electricity, the parameter of battery is gathered to battery parameter sampling circuit 102, like electric current, voltage, temperature etc to send the battery parameter of gathering for little the control Unit 12(Microcontroller Unit, MCU), and then little the control Unit 12 can report received battery parameter to the BMU through SBC circuit 11, so that the BMU can accurately acquire the real-time parameter of battery.

Illustratively, the SBC circuit 11 is used to power the BDU controller. The SBC circuit 11 may include an SBC and peripheral circuits, such as a communication interface circuit, a power supply wake-up circuit, etc., to supply power to the entire BDU controller. For example, the SBC circuit 11 may be connected to the BMU through the CAN communication interface 111, and the SBC circuit 11 is connected to the micro control unit 12, so that the micro control unit 12 CAN report the acquired battery parameters to the BMU through the SBC. The SBC circuit 11 may also be connected to the BMS through a power wake-up circuit 112 to enable the SBC circuit 11 to power the entire BDU controller. The SBC circuit 11 and the micro control unit 12 may implement signal transmission through an SPI (Serial Peripheral Interface). In addition, the SBC circuit 11 may further integrate multiple paths of high-side driving circuits and low-side driving circuits, and the specific circuit connection relationship may refer to related technologies, which is not described in detail in this embodiment.

Note that the SBC model in the SBC circuit 11 may be L9117A, L9779WD-SPI, or the like; the model of the micro control unit 12 can be MCP5744, S32K144 and the like; the specific chip structure and principle may refer to the related art, which is not described in detail in this embodiment.

The embodiment of the utility model provides a technical scheme is through integrateing little the control unit 12, SBC circuit 11 and battery parameter sampling circuit 102 together to form the BDU controller, come to be connected respectively with the last lower electricity executive device 20 in the BDU, BMU through the SBC circuit 11 in the BDU controller again. Compared with the prior art, the battery parameter sampling circuit 102 and the internal power-on/power-off executive device 20 of the BDU are respectively and independently connected with the BMU, the BDU controller provided by the embodiment can integrate the circuits together, and the BDU controller is used for realizing a control function on the power-on/power-off executive device 20 in the BDU, so that the wiring and the plug-in connectors between the circuits and the BMU and between the circuits and the internal power-on/power-off executive device 20 in the BDU are reduced, the wiring harness cost is reduced, and the wiring harness arrangement is simpler; in addition, the high voltage of the battery is prevented from being led into the BMU through the wiring harness, and the safety is improved.

Optionally, the BDU controller further includes an Analog-to-Digital Converter (ADC) 101, the battery parameter sampling circuit 102 is connected to a first end of the ADC 101, and a second end of the ADC 101 is connected to the micro control unit 12. It is understood that the analog-to-digital converter 101 may implement the conversion of the signal to convert the electrical signal into a digital signal, so that the micro control unit 12 can read the corresponding data of the battery parameter in real time. The analog-to-digital converter 101 and the micro control unit 12 may also perform signal transmission through SPI, the model of the analog-to-digital converter 101 may be, for example, ADS7812, TLC2588, and the specific signal transmission principle may refer to related technologies, which is not described in detail in this embodiment. Optionally, the battery parameter sampling circuit 102 includes a current sampling circuit, a voltage sampling circuit, and a temperature sampling circuit, and the current sampling circuit, the voltage sampling circuit, and the temperature sampling circuit are all connected to the first end of the analog-to-digital converter. The current sampling circuit collects a battery current signal, the voltage sampling circuit collects a battery voltage signal, the temperature sampling circuit collects a battery temperature signal, and the analog-to-digital converter 101 can convert the current signal, the voltage signal and the temperature signal into a digital signal so that the micro control unit 12 can read data.

In this embodiment, the current sampling circuit includes a shunt resistor 142 and a programmable Gain Amplifier 141 (PGA), a first end of the PGA 141 is connected to the shunt resistor 142, and a second end of the PGA 141 is connected to the analog-to-digital converter 101. It can be understood that the shunt resistor 142 is used to collect a battery current signal, and the collected current signal is amplified by the PGA 141 and then converted into a digital signal by the analog-to-digital converter 101, so that the micro control unit 12 can read corresponding current data in real time. Optionally, the shunt resistor 142 may be fixed in the BDU; the current sampling circuit further includes a peripheral circuit, and a specific structure of the peripheral circuit may refer to the related art, which is not described herein again. Illustratively, the PGA model may be PGA280, PGA281, or the like.

The voltage sampling circuit comprises a sampling resistor 152 and a first operational amplifier 151, wherein a first end of the first operational amplifier 151 is connected with the sampling resistor 152, and a second end of the first operational amplifier 151 is connected with the analog-to-digital converter 101. The sampling resistor 152 collects the voltage of the battery, and the sampling resistor 152 can divide the voltage of the battery into a range capable of being collected by the analog-to-digital converter 101 through resistor voltage division, amplify the voltage signal through the first operational amplifier 151, and convert the voltage signal into a digital signal through the analog-to-digital converter 101, so that the micro control unit 12 can read corresponding voltage data in real time. It should be noted that the voltage sampling circuit may further include a peripheral circuit, and a specific structure of the peripheral circuit may refer to the related art, which is not described herein again. The model of the first operational amplifier 151 may be LFC4, F011, etc.

The temperature sampling circuit comprises a thermistor 162 and a second operational amplifier 161, wherein a first end of the second operational amplifier 161 is connected with the thermistor 162, and a second end of the second operational amplifier 161 is connected with the analog-to-digital converter 101. The thermistor 162 collects the battery temperature and can convert the temperature into an electrical signal, which is amplified by the second operational amplifier 161 and converted into a digital signal by the analog-to-digital converter 101, so that the micro control unit 12 can read the corresponding temperature data in real time. It should be noted that the temperature sampling circuit may further include a peripheral circuit, and a specific structure of the peripheral circuit may refer to the related art, which is not described herein again. In this embodiment, the second operational amplifier 161 may be the same product structure as the first operational amplifier 151.

Optionally, the embodiment of the present invention provides a BDU controller further includes a pre-charging circuit 13, the pre-charging circuit 13 includes a pre-charging resistor and a first MOS transistor, the first end of the first MOS transistor is connected to the micro control unit 12, the second end of the first MOS transistor is connected to the pre-charging resistor. The micro control unit 12 may send a control command to control the first MOS transistor to close or open, so that the current passes through the pre-charge resistor to complete the pre-charge function. It should be noted that, signal transmission between the first MOS transistor and the micro control unit 12 may be realized through an IO interface.

In addition, the BDU controller further includes a fault trigger circuit 17, the fault trigger circuit 17 is connected to the micro control unit 12, and signal transmission between the fault trigger circuit 17 and the micro control unit 12 may be realized through PWM (Pulse width modulation). The fault trigger circuit 17 may include a second MOS transistor and a peripheral circuit, and the fault trigger circuit 17 may acquire the diagnostic information in real time and send the diagnostic information to the micro control unit 12, and then the micro control unit 12 reports the diagnostic information to the BMU through the CAN communication interface 111, so that the BMU CAN send a control command to cut off a relay in the BDU when the power battery system fails, thereby ensuring the safety of the power battery system.

Illustratively, the SBC circuit 11 in the BDU controller is connected to the upper and lower electrical actuators 20 within the BDU. The power-on and power-off executive device 20 comprises a main positive relay 21, a main negative relay 22, a charging positive relay 23 and a charging negative relay 24, and the BDU controller can control the on and off of the relays.

In this embodiment, after the power battery system is awakened, each sampling circuit sends the acquired battery parameters, such as the battery current, the battery voltage, the circuit temperature, the insulation resistance, and the diagnostic information acquired by the fault trigger circuit 17, to the micro control unit 12, and the micro control unit 12 reports the battery parameters to the BMU through the CAN communication interface 111, so that the BMU CAN acquire the battery parameters in time, and the power on/off execution device 20 in the BDU is controlled in a targeted manner according to the battery parameters. When the power battery system is electrified and receives an electrifying command, the BDU controller controls to close the main negative relay 22 and the pre-charging relay in the pre-charging circuit 13 to complete pre-charging, and then the main positive relay 21 is closed to electrify the system. And after receiving a power-off command, the BDU controller controls to disconnect the main positive relay 21 and the main negative relay 22, so that the power-off of the system is completed. When the system has a fault, the BDU controller sends fault information to the BMU through the CAN communication interface 111, and the BMU CAN send a control command to the BDU controller through the CAN communication interface 111 so as to immediately cut off each relay in the BDU and ensure the safety of the system.

In addition, the power-on/power-off actuator 20 further includes at least one reserved relay interface 25, and the at least one reserved relay interface 25 is connected with the SBC circuit 11 in the BDU controller. In addition, the at least one reserved relay interface 25 may be for connecting other loads on the vehicle, so that the BDU controller can implement control over the loads to which the at least one reserved relay interface 25 is connected.

The embodiment of the utility model provides a BDU is still provided, BDU include the upper and lower electricity executive device and as in the above embodiment BDU controller, the upper and lower electricity executive device includes main positive relay, main negative relay, the positive relay that charges and the negative relay that charges, main positive relay the main negative relay the positive relay that charges with the negative relay that charges all with SBC circuit connection among the control circuit. The BDU controller provided in this embodiment has all the technical features as in the above embodiments, and can achieve the same technical effects, and is not described herein again to avoid repetition. In addition, in the BDU provided in this embodiment, the control principle and the specific implementation process of the BDU controller for the power-on/power-off executive device may refer to the specific description in the BDU controller, and are not described herein again.

Illustratively, the power on/off actuator further comprises at least one reserved relay interface, and the at least one reserved relay interface is connected with the SBC circuit in the BDU controller. In addition, the at least one reserved relay interface may be for connecting other loads on the vehicle to enable the BDU controller to implement control of the load to which the at least one reserved relay interface is connected.

The embodiment of the utility model provides a vehicle is still provided, the vehicle includes the BDU in as above embodiment. The BDU in this embodiment has all the technical features of the BDUs in the above embodiments, and can achieve the same technical effects, and is not described herein again to avoid repetition.

The above embodiments are only specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention, and all should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A BDU controller of a battery circuit breaking unit is characterized by comprising a control circuit and a battery parameter sampling circuit, wherein the control circuit is connected with the battery parameter sampling circuit;

2. The BDU controller of claim 1, wherein the control circuit includes a micro-control unit and a System Base Chip (SBC) circuit, the micro-control unit is connected to the SBC circuit and the battery parameter sampling circuit, and the SBC circuit is connected to the power-up and power-down actuator and the BMU, respectively.

3. The BDU controller of claim 2, further comprising an analog-to-digital converter, wherein the battery parameter sampling circuit is connected to a first terminal of the analog-to-digital converter, and wherein a second terminal of the analog-to-digital converter is connected to the micro control unit.

4. The BDU controller of claim 3, wherein the battery parameter sampling circuit comprises a current sampling circuit, a voltage sampling circuit, and a temperature sampling circuit, the current sampling circuit, the voltage sampling circuit, and the temperature sampling circuit all connected to the first end of the analog-to-digital converter.

5. A BDU controller according to claim 4, wherein the current sampling circuit comprises a shunt resistor and a Programmable Gain Amplifier (PGA), a first end of the PGA is connected with the shunt resistor, and a second end of the PGA is connected with the analog-to-digital converter.

6. The BDU controller of claim 4, wherein the voltage sampling circuit comprises a sampling resistor and a first operational amplifier, a first end of the first operational amplifier is connected to the sampling resistor, and a second end of the first operational amplifier is connected to the analog-to-digital converter.

7. A BDU controller according to claim 4 wherein said temperature sampling circuit includes a thermistor and a second operational amplifier, a first terminal of said second operational amplifier being connected to said thermistor and a second terminal of said second operational amplifier being connected to said analog to digital converter.

8. The BDU controller of claim 2, wherein the BDU controller further comprises a pre-charge circuit, the pre-charge circuit comprises a pre-charge resistor and a first MOS transistor, a first end of the first MOS transistor is connected to the micro-control unit, and a second end of the first MOS transistor is connected to the pre-charge resistor.

9. The BDU controller of claim 2, further comprising a fail-over circuit coupled to the micro-control unit.

10. A BDU comprising upper and lower electrical actuators and a BDU controller as claimed in any of claims 1 to 9, wherein said upper and lower electrical actuators comprise a main positive relay, a main negative relay, a charging positive relay and a charging negative relay, said main positive relay, said main negative relay, said charging positive relay and said charging negative relay being connected to said control circuit.

11. The BDU according to claim 10, wherein the power on/off actuator further comprises at least one reserved relay interface, the at least one reserved relay interface connected to the control circuit.

12. A vehicle comprising a BDU as claimed in any one of claims 10 to 11.