CN203225567U

CN203225567U - Battery management system with single program initiation (SPI) communication driver circuit

Info

Publication number: CN203225567U
Application number: CN2013202809011U
Authority: CN
Inventors: 刘飞; 文锋; 阮旭松; 吴德斌
Original assignee: Huizhou Epower Electronics Co Ltd
Current assignee: Huizhou Epower Electronics Co Ltd
Priority date: 2013-05-22
Filing date: 2013-05-22
Publication date: 2013-10-02
Anticipated expiration: 2023-05-22

Abstract

The utility model discloses a battery management system with a single program initiation (SPI) communication driver circuit. The battery management system with a SPI communication driver circuit comprises a main control chip and a plurality of driven control chips, wherein the main control chip and each driven chip and every two driven chips are all connected to communicate through a SPI bus, and SPI interfaces which are arranged on the main control chip and each driven control chip are connected with a SPI communication drive circuit. The battery management system with a SPI communication driver circuit adds a drive circuit for each control chip of the battery management system with a drive-driven integrated structure, thereby enhancing drive capability, being capable of guaranteeing communication stability, and enhancing reliability of data transmission.

Description

A kind of battery management system with SPI communication drive circuit

Technical field

The utility model relates to battery management system, particularly a kind of battery management system with SPI communication drive circuit.

Background technology

In master-slave integrated battery management system, when multistage single-chip microcomputer carries out exchanges data, adopt the SPI technology to carry out communication mostly at present.SPI provides the full duplex between single-chip microcomputer, synchronous and serial communication.The transmission rate of SPI is very fast, in holotype the highest bus clock that may operate at divided by on 2 the baud rate, in auxilliary pattern the highest may operate at bus clock divided by 4 baud rate on.Be highly suitable for and carry out real-time Data Transmission between the single-chip microcomputer.And possess full duplex or mongline bidirectional option, transmission baud rate able to programme, advantages such as double buffering transmission and reception make it become the common communication modes that carries out transfer of data between the single-chip microcomputer, shown in its connection diagram accompanying drawing 1.

SPI is the abbreviation of English Serial Peripheral Interface, as the term suggests be exactly Serial Peripheral Interface.SPI, it is a kind of high speed, full duplex, synchronous communication bus, and on the pin of chip, only take four lines, saved the pin of chip, save the space on the layout of PCB simultaneously, provide convenience, just for this characteristic that is simple and easy to usefulness, this communication protocol that now increasing chip is integrated.SPI is a ring bus structure, is made of SS (CS), SPSCK, MISO, MOSI, and its sequential is very simple in fact, mainly is under the control of SPSCK, and two bidirectional shift registers carry out exchanges data.

When SPI was configured to main SPI, clock output was routed to the SPSCK pin, and shift unit output is routed to MOSI, and the shift unit input is come out from MISO pin route.When SPI was configured to from SPI, the SPSCK pin was clock output.MOSI is displacement output, and the MISO pin is the shift unit input.

But there is the driving force defect of insufficient in the SPI mechanics of communication, when multistage microcontroller communication, reliability of data transmission is poor, causes communicating interrupt easily, the error rate height, and then make MCU waste resource in the SPI communication always, influence real-time and the stability of data monitoring.

SPI communication between present most of single-chip microcomputer just directly connects four connections of SPI, perhaps simply increases a high level pull-up resistor, as shown in Figure 2, connects like this and has the driving force deficiency, thereby cause the communication instability.Particularly driving force is just more weak when multistage microcontroller communication.When multistage microcontroller communication, reliability of data transmission is poor, causes communicating interrupt easily, the error rate height, and then make MCU waste resource in the SPI communication always, influence real-time and the stability of data monitoring.

The utility model content

For overcoming the shortcomings and deficiencies of above-mentioned prior art, the utility model provides a kind of battery management system with SPI communication drive circuit.

The technical scheme that the utility model adopts is:

A kind of battery management system with SPI communication drive circuit comprises a main control chip and a plurality of from the control chip, main control chip with each between the control chip, all are connected by spi bus between any two and communicate from controlling chip; Described main control chip and each all are connected with SPI communication drive circuit from the set SPI interface of control chip.

Preferably, described SPI communication drive circuit comprises the level Four amplifying circuit that four transistors constitute.

Compared with prior art, the obtained beneficial effect of the utility model has:

(1) battery management system of band SPI communication drive circuit described in the utility model, increase a drive circuit for each control chip of the battery management system of master-slave integrated structure, strengthened the driving force of battery management system, can guarantee the stability of communication, strengthen reliability of data transmission.

(2) battery management system of band described in the utility model SPI communication drive circuit, SPI communication drive circuit comprise that the level Four amplification circuit structure that four transistors constitute simplifies, and be easy to use, working stability.In the SPI of Multistage Control chip communication, every increase one-level control chip or a peripheral module can directly use this drive circuit module, directly be linked on the existing SPI communication bus and get final product, make battery management system in the function expansion and more convenient and quicker when simplifying.

(3) battery management system of band SPI communication drive circuit described in the utility model, after inserting drive circuit, main control chip directly can be carried out communication with 5 from the control chip simultaneously, can monitor simultaneously 30 node voltages and 15 temperature spots at most, make and utilize SPI to carry out transfer of data between a plurality of control chips to become possibility.

Description of drawings

Fig. 1 is the schematic diagram by the spi bus communication between present a plurality of control chips;

Fig. 2 is the schematic diagram of the spi bus communication of band pull-up resistor;

Fig. 3 is the schematic diagram of the battery management system of band SPI communication drive circuit described in the utility model.

Embodiment

For the ease of those skilled in the art's understanding, below in conjunction with specific embodiment and accompanying drawing the utility model theory of constitution is described in further detail.

As shown in Figure 3, the battery management system of the band SPI communication drive circuit that the utility model discloses, comprise a main control chip and 3 from the control chip, main control chip with each between the control chip, all are connected by spi bus between any two and communicate from controlling chip; Described main control chip and each all are connected with SPI communication drive circuit from the set SPI interface of control chip.

Each drive circuit is made up of four triodes, power supply and some auxiliary circuits.Four triodes are formed the level Four amplifying circuit.

In the SPI of Multistage Control chip communication, every increase one-level control chip or a peripheral module can directly use this drive circuit module, directly are linked on the existing SPI communication bus to get final product.

Any one ancillary equipment or one-level single-chip microcomputer are connected with main control chip by drive circuit, and ancillary equipment or single-chip microcomputer drive the input and output that strengthen and stablize the data-signal of self to the signal of four connections of SPI of being connected to self separately.

Need to prove, not breaking away under the utility model design prerequisite its any minor variations of doing and being equal to replacement, all should belong to protection range of the present utility model.

Claims

1. battery management system with SPI communication drive circuit, comprise a main control chip and a plurality of from the control chip, main control chip with each between the control chip, all are connected by spi bus between any two and communicate from the control chip, it is characterized in that: described main control chip and each all are connected with SPI communication drive circuit from controlling the set SPI interface of chip.