JPS587775A - storage battery - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a storage battery incorporating a microcomputer, and an object of the present invention is to use a microcomputer to manage the status between each storage battery and external equipment such as a charger or an electric vehicle.

In the past, devices with various structures have been invented and devised as devices for monitoring the status of storage batteries during charging, etc., but if they are accurate, they are expensive in terms of cost unless storage battery groups are comprehensively managed. Therefore, it was difficult to manage each storage battery individually.

The present invention has been made in view of the above-mentioned problems, and as microcomputers are now available in small size and low cost due to the recent progress in Elktronics, microcomputers are incorporated into storage batteries to monitor the battery condition.

Also, when using storage battery input/output lines as a method of transmitting battery status from a microcomputer to external equipment,
Information is exchanged between the microcomputer and the equipment using pulses with a periodicity of about 10 seconds, so when this is placed on the input/output line, a relatively large current is flowing through the philtonic line itself, so the noise makes it more accurate. I can't communicate properly. Therefore, in the present invention, the frequency 20K normally used for audio signals is
This is done by superimposing alternating current of Hz or less on the input/output lines. Next, it will be explained in detail using examples.

As an example, an example in which a storage battery controller for an electric vehicle is used as an external device will be described. As shown in the table below, five electric vehicles V[1), V[2), ■(3), V(4)
), V[5), storage battery groups B(1,1) to B(
1,5), B(2,1)~B(2,5), B(3
,1)~B(3,5),B(4,1)~B(4,5),
B(5,t) to B(5°5) are normally arranged, and there are B(6,1) to B(6,5) as backup storage battery groups.

A microcomputer is attached to each storage battery in each storage battery group shown in the table above, and the data of the discharge capacity - 5A discharge conversion characteristic shown in Fig. 1 is inputted, and the 10 KHz and 5 KHz Information was input and output through exchange. Installation to storage battery E is as shown in Figure 2.
A current measuring resistor R1, a voltage detecting section v1, a current detecting section 11, a temperature detecting section T1, and a microcomputer C are respectively attached. To explain the operation, for example, as shown in FIG.
If the detection unit detects that the output capacity of (1, 5) cannot reach the specified device based on the data shown in Fig. 1, the state of storage battery B (1, 5) is changed to Fig. 4 via the input/output line. A display and warning are issued to the user as shown in the calculation flowchart.

As in the embodiments described above, the present invention enables detailed management of storage batteries without wasting effort on individual management of storage batteries, prevents some storage batteries from becoming defective, and properly grasps the storage battery status. You can leave it there. In addition, the above method can be applied to responses with electric vehicle chargers, individual management in floating charging of stationary storage batteries, etc. In addition to voltage, current, and temperature, the method can also be applied to the specific gravity of light liquid, battery internal pressure, gas, etc. This is also possible for various physical quantities such as occurrence. Furthermore, if a new information input/output line for transmitting the battery status to the equipment is provided, the wiring would become complicated, whereas the present invention superimposes an AC signal with a frequency and wave number of 20 KH2 or less on the storage battery output line. It is something. The amplitude of the superimposed AC signal needs to be at least iQ mV due to fluctuations in battery voltage; conversely, it is undesirable for the amplitude to exceed 5096 of the battery voltage because of the effect on the storage battery, and it is not suitable for series-connected collective batteries. It is best to set the voltage to a maximum of 10V.

As described above, the present invention (by incorporating a microcomputer into the storage battery, allows detailed management of the storage battery that was previously done with external equipment). It is a storage battery that can be used to properly instruct people, and its industrial value is great.

[Brief explanation of the drawing]

FIG. 1 is a capacity characteristic diagram of the storage battery, FIG. 2 is a schematic diagram of the storage battery, FIG. 6 is a schematic diagram of the connection of the storage battery, and FIG. 4 is an operation flowchart of the microcomputer. E...Storage battery C...Microcomputer BC...Storage battery controller Applicant Yuasa Battery Co., Ltd.

Claims (2)

[Claims] (1) A storage battery that incorporates a microcomputer and inputs and outputs information to and from external equipment by superimposing an alternating current signal with a frequency of 20KH2 or less on input and output lines connected to positive and negative terminals. (2) The storage battery according to claim 1, wherein the amplitude of the AC signal is 1QmV to 10v1 and 50% or less of the battery voltage.