CN203326059U

CN203326059U - Battery management system

Info

Publication number: CN203326059U
Application number: CN2013204053719U
Authority: CN
Inventors: 张伟友; 庞艳红; 沙伟
Original assignee: Anhui Jianghuai Automobile Group Corp
Priority date: 2013-07-09
Filing date: 2013-07-09
Publication date: 2013-12-04
Anticipated expiration: 2023-07-09

Abstract

The utility model discloses a battery management system which comprises a master control module, a high voltage isolation module and a plurality of collecting chips. Each collecting chip collects the voltage of one or more single batteries in a battery pack. The battery management system further comprises a filtering module. The collecting chips are sequentially connected in an end-to-end mode according to the daisy chain mode, and the collecting chip located at the tail end sequentially passes through the filtering module and the high voltage isolation module to be in communication connection with the master control module through an IIC bus. The filtering module is preferentially a common mode filter. The collecting chips are preferentially collecting chips in the type of MAX17830. The battery management system is low in cost, high in hardware integration level and high in information collecting rate.

Description

A kind of battery management system

Technical field

The utility model relates to the electric automobile field, relates in particular to the battery management system of the employing tandem monomer battery voltage acquisition scheme that a kind of cost is low, the hardware integration degree is high, information gathering speed is fast.

Background technology

Along with the fast development of new energy sources for automobile technology, more and more higher to the specification requirement of battery management system.Yet, the most battery management system adopts distributed monomer cell voltage acquisition scheme, as shown in Figure 1, adopt the battery management system of distributed monomer cell voltage acquisition scheme to comprise main control module 1010, n high pressure isolation module (comprises the first high pressure isolation module 21, the second high pressure isolation module 22, third high is pressed isolation module 23 ... n high pressure isolation module 2n) and n acquisition chip (the first acquisition chip 41, the second acquisition chip 42, the 3rd acquisition chip 43 n acquisition chip 4n), each acquisition chip is for gathering the voltage of one or more cells of battery pack 5050.Adopt in distributed monomer voltage acquisition scheme, the corresponding high pressure isolation module of each acquisition chip, each described acquisition chip is processed uploading to main control module 10 after the information processing of monomer voltage by high pressure isolation module corresponding thereto.Generally: the characteristics such as this scheme cost is high, technical difficulty is large, difficult in maintenance.

At present, in battery management system, tandem monomer voltage acquisition scheme is fewer, and the quantity of the cell that can gather is few.The main technological difficulties of tandem monomer voltage acquisition scheme are: the communication between the acquisition chip after series connection and main control module 10 is difficult to guarantee, the situations such as communication information loss between acquisition chip and main control module 10 easily occur.

The utility model content

The purpose of this utility model is to overcome deficiency of the prior art, and the battery management system of the employing tandem monomer battery voltage acquisition scheme that a kind of cost is low, the hardware integration degree is high, information gathering speed is fast is provided.

For achieving the above object, described battery management system, comprise main control module, high pressure isolation module and a plurality of acquisition chip, and each described acquisition chip gathers the voltage of one or more cells in battery pack, be characterized in, described battery management system also comprises filtration module; And described a plurality of acquisition chips connect according to daisy chaining head and the tail successively, the acquisition chip that is positioned at end sequentially is connected with described main control module communication with the high pressure isolation module through described filtration module by iic bus.

Preferably, described filtration module is common-mode filter.

Preferably, the model of described acquisition chip is MAX17830.

The beneficial effects of the utility model are, the cost of described battery management system is low, the hardware integration degree is high, information gathering speed is fast.

The accompanying drawing explanation

Fig. 1 shows the structural representation of the battery management system of available technology adopting distributed monomer cell voltage acquisition scheme.

Fig. 2 shows the structural representation of the battery management system of employing tandem monomer battery voltage acquisition scheme of the present utility model.

Fig. 3 shows the connecting circuit figure of the acquisition chip shown in Fig. 2 and high pressure isolation module.

Fig. 4 shows the connecting circuit figure of the high pressure isolation module shown in Fig. 2 and main control module.

Embodiment

Below describe embodiment of the present utility model in detail, the example of described embodiment is shown in the drawings, and wherein same or similar label means same or similar element or the element with identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, only for explaining the utility model, and can not be interpreted as restriction of the present utility model.

With reference to Fig. 2, described battery management system, comprise main control module 10, high pressure isolation module 20, filtration module 30, and n acquisition chip (the first acquisition chip 41, the second acquisition chip 42, the 3rd acquisition chip 43 ..., n acquisition chip 4n), each described acquisition chip gathers the voltage of the one or more cells in battery pack 50.N acquisition chip connects according to daisy chaining head and the tail successively, is positioned at the n acquisition chip 4n of end, by iic bus, through described filtration module 30, with high pressure isolation module 20, with described main control module 10 communications, is connected in turn.

With reference to Fig. 3 and Fig. 4, clock signal and the data-signal by n acquisition chip 4n, exported input to high pressure isolation module 20 by two filtration modules 30 respectively, then input to main control module 10.Here, described filtration module 30 is preferably common-mode filter.In addition, in Fig. 4, the utility model is realized the coupling to the power supply of order wire by power Vcc and Vcc1.

In addition, described acquisition chip is preferably the acquisition chip that model is MAX17830.

Comparison diagram 1 and Fig. 2, can find out, the battery management system of employing tandem monomer battery voltage acquisition scheme described in the utility model only adopts a high pressure isolation module 20, can realize the function identical with the battery management system that adopts distributed monomer cell voltage acquisition scheme, reduce the cost of battery management system.

Further, the utility model is processed and has been realized the successful collection of monomer battery voltage information by filtering processing, high pressure isolation and the currents match of the acquisition chip to monomer voltage and main control module 10 communications, and has realized the traffic rate of 400KHZ.

Battery management system that it should be noted that employing tandem monomer battery voltage acquisition scheme described in the utility model can be applied to different automobile types, also can be applied in different industries.

Embodiment shown in above foundation is graphic describes structure of the present utility model, feature and action effect in detail; the foregoing is only preferred embodiment of the present utility model; but the utility model does not limit practical range with shown in drawing; every change of doing according to conception of the present utility model; or be revised as the equivalent embodiment of equivalent variations; when not exceeding yet specification and illustrating contain spiritual, all should be in protection range of the present utility model.

Claims

1. a battery management system, comprise main control module, high pressure isolation module and a plurality of acquisition chip, and each described acquisition chip gathers the voltage of one or more cells in battery pack, and it is characterized in that: described battery management system also comprises filtration module; And described a plurality of acquisition chips connect according to daisy chaining head and the tail successively, the acquisition chip that is positioned at end sequentially is connected with described main control module communication with the high pressure isolation module through described filtration module by iic bus.

2. battery management system according to claim 1, it is characterized in that: described filtration module is common-mode filter.

3. battery management system according to claim 1 and 2, it is characterized in that: the model of described acquisition chip is MAX17830.