Integrated battery management controller and automobile

Abstract

The invention discloses an integrated battery management controller and an automobile. The integrated battery management controller comprises a communication circuit, a total acquisition circuit, an isolation circuit and a driving circuit, the main acquisition circuit is in communication connection with the communication circuit through the isolation circuit, and the driving circuit is in communication connection with the communication circuit; the communication circuit is used for receiving an instruction of a superior controller, transmitting the instruction to the driving circuit, and / or transmitting the instruction to the total acquisition circuit through the isolation circuit; the driving circuit and the total acquisition circuit are both used for receiving and executing the instruction. The system is high in integration level, low in failure rate, high in reliability and capable of providing isolation voltage protection for communication of the high-voltage side and the low-voltage side.

Description

Technical Field

[0001] The present invention relates to a new energy vehicle, and in particular to an integrated battery management controller and a vehicle. Background Art

[0002] With the rapid development of new energy vehicles and the shift of the focus of national planning, the share of new energy vehicles in the Chinese market has increased significantly, and the design of vehicle electronic control units is also developing rapidly. At present, the vehicle electronic control unit model of most cars on the market still uses the combination of traditional central controllers and distributed functional controllers (such as electric drive controllers and battery management controllers, etc.). The logic processing requires hierarchical control, and each functional controller contains a micro control unit. For the upgrade of the vehicle program, many controllers need to be upgraded, the upgrade time is long, and the after-sales maintenance time cost is high. Therefore, it is necessary to improve the battery management controller model and design a lower-cost and simpler battery management controller to adapt to the current development of vehicle electronic control units, thereby reducing the underlying software program, reducing the vehicle program upgrade time and the after-sales maintenance cost of a single package.

[0003] CN117382484A discloses an integrated battery controller and an integrated battery, wherein the integrated battery controller includes: a plurality of conversion circuits, connected to a plurality of batteries in a one-to-one correspondence, the conversion circuits are used to collect the working parameters of the batteries and convert the working parameters into controller local area network data; a domain controller, connected to the conversion circuits, is used to control the batteries based on the controller local area network data. This solution integrates a plurality of battery management controllers into the domain controller, which realizes centralized control of the batteries and avoids the problem of battery failure caused by different problems of the battery controller itself when the batteries are dispersed through independent battery controllers, thereby reducing the problem of battery failure rate. However, integrating all the plurality of battery management controllers into the domain controller increases the overall cost of the domain controller and the after-sales maintenance cost. Summary of the invention

[0004] In view of this, an object of the present invention is to provide an integrated battery management controller and a vehicle, which have high integration, low failure rate, high reliability, and can provide isolation voltage protection for communications on the high voltage side and the low voltage side.

[0005] An integrated battery management controller in the present invention comprises a communication circuit, a total acquisition circuit, an isolation circuit and a drive circuit; the total acquisition circuit is communicatively connected with the communication circuit via the isolation circuit, and the drive circuit is communicatively connected with the communication circuit; The communication circuit is used to: receive instructions from the upper controller and transmit the instructions to the drive circuit, and / or transmit the instructions to the general acquisition circuit through the isolation circuit; The driving circuit and the total acquisition circuit are both used for receiving and executing the instruction.

[0006] Further, the instructions include driving instructions and total acquisition query instructions; The communication circuit is specifically used to: receive instructions from the upper controller, transmit the drive instruction to the drive circuit, and transmit the total acquisition query instruction to the total acquisition circuit through the isolation circuit; The driving circuit is specifically used to: receive the driving instruction and control the opening and closing of the relay; The total acquisition circuit is specifically used to: receive the total acquisition query instruction, and acquire battery pack status information, where the battery pack status information includes one or more of the total voltage, total current, and insulation resistance.

[0007] Furthermore, the total acquisition circuit is specifically used to: transmit the battery pack status information to the communication circuit through the isolation circuit; The communication circuit is specifically used to receive the battery pack status information and transmit it to the upper-level controller.

[0008] Furthermore, the integrated battery management controller also includes a power supply circuit; the power supply circuit is used to: draw power from an external power supply and output it to the communication circuit, the isolation circuit, the drive circuit and the total acquisition circuit.

[0009] Furthermore, the power supply circuit includes a primary power supply DCDC and a secondary power supply isolation DCDC; the power supply circuit is used to: be able to draw power from an external power supply, convert the input voltage into a first output voltage through the primary power supply DCDC and output it to the communication circuit, the isolation circuit and the drive circuit, and convert the first output voltage into a second output voltage through the secondary power supply isolation DCDC and output it to the total acquisition circuit.

[0010] Furthermore, the integrated battery management controller further comprises a battery status monitoring unit, and the battery status monitoring unit is communicatively connected with the communication circuit; the instruction further comprises a single-cell query instruction; The battery status monitoring unit is used to: collect single cell status information and transmit the single cell status information to the communication circuit; the single cell status information includes single cell voltage and / or single cell temperature; The communication circuit is further specifically used for: receiving the single cell status information, and after receiving the single cell query instruction issued by the upper level controller, transmitting the single cell status information to the upper level controller.

[0011] Furthermore, the integrated battery management controller also includes a first high-voltage interface and a second high-voltage interface, the first high-voltage interface is connected to the battery status monitoring unit, and the second high-voltage interface is connected to the total acquisition circuit.

[0012] Furthermore, the integrated battery management controller also includes a first low-voltage interface, the communication circuit includes a main communication chip and a transceiver, the total acquisition circuit includes a total acquisition chip, the isolation circuit includes an isolation SPI chip, and the drive circuit includes a drive chip; the main communication chip and the upper-level controller are communicated through the transceiver and the first low-voltage interface, the main communication chip and the total acquisition chip are communicated through the isolation SPI chip, and the main communication chip is communicated with the drive chip.

[0013] Furthermore, the integrated battery management controller also includes a second low-voltage interface, and the second low-voltage interface is communicatively connected to the driving chip.

[0014] A car in the present invention comprises the above-mentioned integrated battery management controller.

[0015] The beneficial effects of the present invention are: (1) The present invention replaces the central processing unit of the traditional controller with the main communication chip of the communication circuit, realizes the control of the driving chip operation and multi-chip data transmission through the main communication chip with multiple communication channels and multiple IO ports, and realizes the collection of various information such as total voltage, total current and insulation resistance through the total acquisition chip integrating multiple acquisition functions, thereby simplifying the system and improving the integration of the integrated battery management controller. At the same time, it also has the advantage of platform development. Because of its simpler logic control flow, the integrated battery management controller has a lower failure rate, higher reliability and lower cost.

[0016] (2) The present invention completely isolates the high and low voltage circuits through the reasonable setting of the power supply circuit and the isolation circuit, which can provide isolation voltage protection for the communication between the high voltage side and the low voltage side of the integrated battery management controller, and realize data transmission between the high voltage side and the low voltage side, thereby further improving the reliability of the integrated battery management controller. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, the present invention provides the following drawings for illustration: Figure 1 A schematic diagram of the framework of the integrated battery management controller of the present invention; Figure 2 The figure is a logic processing flow chart of the integrated battery management controller of the present invention.

[0018] The markings in the accompanying drawings are as follows: 1-communication circuit, 101-main communication chip, 102-transceiver, 2-total acquisition circuit, 3-isolation circuit, 4-drive circuit, 5-power supply circuit, 6-battery status monitoring unit, 7-first high-voltage interface, 8-second high-voltage interface, 9-first low-voltage interface, 10-second low-voltage interface, 11-upper controller. DETAILED DESCRIPTION

[0019] The technical solution of the present invention is described in detail below in conjunction with the accompanying drawings and embodiments.

[0020] like Figure 1 and Figure 2 As shown, an integrated battery management controller (the integrated battery management controller is BMU) in this embodiment includes a power supply circuit 5, a communication circuit 1, a total acquisition circuit 2, an isolation circuit 3, a drive circuit 4, a battery status monitoring unit 6, a first high-voltage interface 7, a second high-voltage interface 8, a first low-voltage interface 9 and a second low-voltage interface 10.

[0021] The communication circuit 1 includes a main communication chip 101 and a transceiver 102 . The main communication chip 101 may be an MC33665 chip. The transceiver 102 is a CAN transceiver. The CAN transceiver may be an ATA6570 chip.

[0022] The communication circuit 1 is specifically used for: 1 receives the instruction of the upper controller 11, and transmits the instruction to the driving circuit 4, and / or transmits the instruction to the total acquisition circuit 2 through the isolation circuit 3. The instruction includes a driving instruction, a total acquisition query instruction and a single-unit query instruction. Therefore, after receiving the instruction of the upper controller 11, the communication circuit 1 transmits the driving instruction to the driving circuit 4, and transmits the total acquisition query instruction to the total acquisition circuit 2 through the isolation circuit 3; After the total acquisition circuit 2 transmits the battery pack status information to the communication circuit 1 through the isolation circuit 3, the communication circuit 1 receives the battery pack status information and transmits it to the upper controller 11, wherein the battery pack status information includes one or more of the total voltage, the total current and the insulation resistance; 3 receives the single cell status information from the battery status monitoring unit 6, and after receiving the single cell query instruction issued by the upper controller 11, transmits the single cell status information to the upper controller 11.

[0023] The upper-level controller 11 is a domain controller, and the main communication chip 101 and the upper-level controller 11 are communicated through the transceiver 102 and the first low-voltage interface 9, that is, the main communication chip 101 is connected to the transceiver 102, and the transceiver 102 is connected to the first low-voltage interface 9. The first low-voltage interface 9 can be connected to the upper-level controller 11 by a hard-wired connection, thereby realizing the CAN communication connection between the upper-level controller 11 and the integrated battery management controller.

[0024] The power supply circuit 5 adopts a secondary isolation DCDC chip, and the power supply circuit 5 includes a primary power supply DCDC and a secondary power supply isolation DCDC; the input end of the primary power supply DCDC is connected to the first low-voltage interface 9, so that the upper controller 11 can provide low-voltage power to the integrated battery management controller as an external power supply, the output end of the primary power supply DCDC is respectively connected to the communication circuit 1, the isolation circuit 3 and the drive circuit 4, and the output end of the secondary power supply isolation DCDC is connected to the total acquisition circuit 2.

[0025] The power supply circuit 5 is specifically used for: being able to draw power from an external power supply, converting the input voltage into a first output voltage through the primary power supply DCDC and outputting it to the communication circuit 1, the isolation circuit 3 and the drive circuit 4, and converting the first output voltage into a second output voltage through the secondary power supply isolation DCDC and outputting it to the total acquisition circuit 2. Among them, since the power is drawn from the small battery of the whole vehicle through the upper-level controller 11, the input voltage is an input voltage within a certain range. After conversion by the primary power supply DCDC, the first output voltage is a stable output 5V power supply, which can power the low-voltage side chip (main communication chip 101, isolated SPI chip and drive chip). The secondary power supply isolation DCDC converts the first output voltage, which is a stable output 5V power supply, into a second output voltage that can be used on the high-voltage side. The second output voltage is selected according to the actual working voltage range of the high-voltage side acquisition chip used. The second output voltage is a non-fixed value ( Figure 1 *V indicates a non-fixed value), which can be 5V or higher than 5V, and can power the high-voltage side chip (the total acquisition chip).

[0026] The total acquisition circuit 2 includes a total acquisition chip, which can be an ADBMS2950 chip, integrating multiple functions of acquiring the total voltage, total current and insulation resistance of the battery pack. The total acquisition chip is connected to the second high-voltage interface 8, and the main communication chip 101 and the total acquisition chip are connected to each other through an isolated SPI chip.

[0027] The total acquisition circuit 2 is specifically used to: receive the total acquisition query instruction, acquire battery pack status information, and transmit the battery pack status information to the communication circuit 1 through the isolation circuit 3. The battery pack status information includes one or more of the total voltage, total current and insulation resistance.

[0028] The isolation circuit 3 includes an isolation SPI chip, which provides isolation voltage protection for the communication between the high voltage side and the low voltage side of the integrated battery management controller and realizes data transmission between the high voltage side and the low voltage side.

[0029] The driving circuit 4 includes a driving chip, which can be a multi-channel driving chip, for example, the driving chip can be an L9026 chip. The driving chip is hard-wired to an external relay through a second low-voltage interface 10, and the main communication chip 101 is connected to the driving chip for communication. The driving chip receives a driving instruction issued by the communication circuit 1 through SPI communication to control the opening and closing of the relay.

[0030] The battery status monitoring unit 6 includes one or more analog front-end acquisition chips, which can be MC33774 chips, and can be expanded by different numbers of analog front-end acquisition chips to adapt to battery packs with different capacities. The battery status monitoring unit 6 is hard-wired to the single cell through the first high-voltage interface 7, and the battery status monitoring unit 6 is output to the communication circuit 1 through TPL communication. The battery status monitoring unit 6 is specifically used to: collect single cell status information, and transmit the single cell status information to the communication circuit 1; the single cell status information includes single cell voltage and / or single cell temperature.

[0031] The working principle of the integrated battery management controller is explained below: When in use, the integrated battery management controller is hard-wired to the upper-level controller 11 through the first low-voltage interface 9 (the upper-level controller 11 can be a domain controller), is hard-wired to the external relay through the second low-voltage interface 10, is hard-wired to the single cell through the first high-voltage interface 7, and is hard-wired to the external battery pack total pressure collection through the second high-voltage interface 8.

[0032] The upper controller 11 inputs the control signal through the first low-voltage interface 9 and the transceiver 102 , and the main communication chip 101 processes and distributes the signal after receiving the control signal.

[0033] The main communication chip 101 distributes the control signal (ie, driving instruction) related to the relay to the driving chip, and the driving chip executes the driving instruction. The driving chip controls the opening and closing of the relay through the second low-voltage interface 10 .

[0034] The main communication chip 101 transmits the control signal related to the total acquisition (i.e., the total acquisition query instruction) to the total acquisition chip through the isolated SPI chip. The total acquisition chip executes the total acquisition query instruction. The total acquisition chip collects the battery pack status information such as the total voltage, total current and insulation resistance of the battery pack, and transmits the collected battery pack status information to the main communication chip 101 through the isolated SPI chip. After the main communication chip 101 receives the battery pack status information, the main communication chip 101 transmits the battery pack status information to the upper-level controller 11 through the first low-voltage interface 9 and the transceiver 102.

[0035] The battery status monitoring unit 6 collects single cell status information such as single cell voltage and single cell temperature, and transmits the single cell status information to the main communication chip 101. After the main communication chip 101 receives the single cell status information, the main communication chip 101 transmits the single cell status information to the upper controller 11.

[0036] After the main communication chip 101 transmits the battery pack status information and the single cell status information to the upper-level controller 11 , the upper-level controller 11 can perform further data processing.

[0037] The main communication chip 101 of the communication circuit 1 replaces the central processing unit of the traditional controller, and the main communication chip 101 with multiple communication channels and multiple IO ports realizes the control of the driving chip operation and multi-chip data transmission. The total acquisition chip integrating multiple acquisition functions realizes the acquisition of various information such as total voltage, total current and insulation resistance, which simplifies the system and improves the integration of the integrated battery management controller. At the same time, it also has the advantage of platform development. Because of its simpler logic control flow, the integrated battery management controller has a lower failure rate, higher reliability and lower cost.

[0038] In addition, through the reasonable setting of the power supply circuit 5 and the isolation circuit 3, the high and low voltage circuits are completely isolated, which can provide isolation voltage protection for the communication between the high voltage side and the low voltage side of the integrated battery management controller, and realize data transmission between the high voltage side and the low voltage side, further improving the reliability of the integrated battery management controller.

[0039] A car in this embodiment includes the above-mentioned integrated battery management controller.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. An integrated battery management controller, characterized in that: It comprises a communication circuit (1), a total acquisition circuit (2), an isolation circuit (3) and a drive circuit (4); the total acquisition circuit (2) and the communication circuit (1) are communicatively connected via the isolation circuit (3), and the drive circuit (4) and the communication circuit (1) are communicatively connected; The communication circuit (1) is used to: receive instructions from a superior controller (11), and transmit the instructions to the drive circuit (4), and / or transmit the instructions to the general acquisition circuit (2) via the isolation circuit (3); The driving circuit (4) and the total acquisition circuit (2) are both used to receive and execute the instruction.

2. The integrated battery management controller according to claim 1, characterized in that: The instructions include drive instructions and total acquisition query instructions; the communication circuit (1) is specifically used to: receive instructions from an upper-level controller (11), transmit the drive instructions to the drive circuit (4), and transmit the total acquisition query instructions to the total acquisition circuit (2) through the isolation circuit (3); The driving circuit (4) is specifically used to: receive the driving instruction and control the opening and closing of the relay; The total acquisition circuit (2) is specifically used to: receive the total acquisition query instruction and acquire battery pack status information, wherein the battery pack status information includes one or more of the total voltage, the total current and the insulation resistance.

3. The integrated battery management controller according to claim 2, characterized in that: The total acquisition circuit (2) is further specifically used to: transmit the battery pack status information to the communication circuit (1) via the isolation circuit (3); The communication circuit (1) is specifically used to: receive the battery pack status information and transmit it to the upper-level controller (11).

4. The integrated battery management controller according to claim 1, characterized in that: The integrated battery management controller further comprises a power supply circuit (5); the power supply circuit (5) is used to: obtain power from an external power supply and output the power to the communication circuit (1), the isolation circuit (3), the drive circuit (4) and the total acquisition circuit (2).

5. The integrated battery management controller according to claim 4, characterized in that: The power supply circuit (5) comprises a primary power supply DCDC and a secondary power supply isolation DCDC; the power supply circuit (5) is used to: be able to draw power from an external power supply, convert an input voltage into a first output voltage through the primary power supply DCDC and output it to the communication circuit (1), the isolation circuit (3) and the drive circuit (4), and convert the first output voltage into a second output voltage through the secondary power supply isolation DCDC and output it to the total acquisition circuit (2).

6. The integrated battery management controller according to claim 1, characterized in that: The integrated battery management controller further comprises a battery status monitoring unit (6), the battery status monitoring unit (6) being communicatively connected to the communication circuit (1); the instruction further comprises a single-cell query instruction; The battery status monitoring unit (6) is used to: collect single cell battery status information, and transmit the single cell battery status information to the communication circuit (1); the single cell battery status information includes single cell battery voltage and / or single cell battery temperature; The communication circuit (1) is also specifically used to: receive the single cell battery status information, and after receiving the single cell query instruction issued by the upper-level controller (11), transmit the single cell battery status information to the upper-level controller (11).

7. The integrated battery management controller according to claim 6, characterized in that: The integrated battery management controller further comprises a first high-voltage interface (7) and a second high-voltage interface (8), wherein the first high-voltage interface (7) is connected to the battery status monitoring unit (6), and the second high-voltage interface (8) is connected to the overall acquisition circuit (2).

8. The integrated battery management controller according to claim 1, characterized in that: The integrated battery management controller further comprises a first low-voltage interface (9), the communication circuit (1) comprises a main communication chip (101) and a transceiver (102), the total acquisition circuit (2) comprises a total acquisition chip, the isolation circuit (3) comprises an isolation SPI chip, and the drive circuit (4) comprises a drive chip; the main communication chip (101) and the upper-level controller (11) are communicatively connected via the transceiver (102) and the first low-voltage interface (9), the main communication chip (101) and the total acquisition chip are communicatively connected via the isolation SPI chip, and the main communication chip (101) and the drive chip are communicatively connected.

9. The integrated battery management controller according to claim 8, characterized in that: The integrated battery management controller further comprises a second low-voltage interface (10), wherein the second low-voltage interface (10) is communicatively connected to the driving chip.

10. An automobile, characterized in that: Comprising an integrated battery management controller as described in any one of claims 1-9.

Images