CN212695732U

CN212695732U - Multi-parallel battery system management circuit

Info

Publication number: CN212695732U
Application number: CN202021554490.7U
Authority: CN
Inventors: 王君; 李小龙; 周逊伟
Original assignee: Hangzhou Xieneng Technology Co ltd
Current assignee: Hangzhou Xieneng Technology Co ltd
Priority date: 2020-07-31
Filing date: 2020-07-31
Publication date: 2021-03-12
Anticipated expiration: 2030-07-31

Abstract

The utility model provides a many parallelly connected battery system management circuit, management circuit includes communication circuit and awakening circuit, and the energy storage converter carries out information interaction through communication circuit and many parallelly connected battery system; the battery systems mutually carry out information interaction through the wake-up circuit; when the energy storage converter can charge the undervoltage battery system, the undervoltage battery system is awakened through the awakening circuit after the undervoltage online battery system receives the charging instruction. The utility model discloses can make full use of opportunity that battery system can charge, furthest's extension under-voltage battery system's standby time has reduced artificial intervention's probability, has promoted the reliability and the stability of system.

Description

Multi-parallel battery system management circuit

Technical Field

The utility model relates to a power electronics field, in particular to many parallelly connected battery system management circuit.

Background

In the current application of industries such as household energy storage and backup base stations, a plurality of battery systems are connected in parallel, when the voltage of a certain box of batteries is too low, the box of batteries exits parallel connection, is offline and enters a low power consumption mode, namely a sleep mode. The existing practice in the industry is that when charging is available, a PCS sends a charging instruction, and an 'off-line' battery system is awakened at regular time, and if the charging instruction is received, charging is started. Otherwise, the low power consumption mode is continuously entered.

Under the existing method, if the system of the under-voltage offline dormancy needs to be charged in time, the system needs to be frequently awakened to detect whether the charging can be carried out, so that the power consumption of the system is increased, the under-voltage battery is further excessive in power consumption, and finally the battery can not be awakened by self (insufficient power supply) any more, and manual intervention is needed. If the time interval for system wake-up is extended in order to reduce power consumption, this may result in: when charging is possible, the system does not wake up; when awake, the charging opportunity has been missed. The chances of enabling charging of an undervoltage "offline" dormant system are greatly reduced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a can make full use of battery chargeable opportunity and furthest's extension under-voltage battery stand-by time's many parallelly connected battery system management circuit for solve the artificial intervention probability height that prior art exists, the problem that the chance of charging is few.

In order to achieve the above object, the utility model provides a management circuit of a multi-parallel battery system, which comprises a communication circuit and a wake-up circuit, wherein an energy storage converter performs information interaction with the multi-parallel battery system through the communication circuit; the battery systems mutually carry out information interaction through the wake-up circuit;

when the energy storage converter can charge the undervoltage battery system, the undervoltage battery system is awakened through the awakening circuit after the undervoltage online battery system receives the charging instruction.

Optionally, when a certain battery system is under-voltage, the charging switch corresponding to the battery system is turned off, the battery system enters an offline sleep state, and communication between the battery system and the energy storage converter is interrupted.

Optionally, after the undervoltage battery system is awakened, the host in the multiple parallel battery system sends an instruction to control the conduction of the charging switch corresponding to the undervoltage battery system, and the energy storage converter charges the undervoltage battery system.

Compared with the prior art, the utility model has the advantages of it is following: the energy storage converter performs information interaction with the multi-parallel battery system through the communication circuit; the battery systems mutually carry out information interaction through the wake-up circuit; when the energy storage converter can charge the undervoltage battery system, the undervoltage battery system is awakened through the awakening circuit after the undervoltage online battery system receives the charging instruction. This the utility model discloses but the opportunity that make full use of battery can charge, furthest's extension the standby time of under-voltage battery, reduced artificial intervention's probability, promoted the reliability and the stability of system.

Drawings

Fig. 1 is a schematic diagram of a management circuit of a multi-parallel battery system according to the present invention;

Detailed Description

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention is not limited to only these embodiments. The present invention covers any alternatives, modifications, equivalents, and alternatives falling within the spirit and scope of the present invention.

In the following description of the preferred embodiments of the present invention, specific details are set forth in order to provide a thorough understanding of the present invention, and it will be apparent to those skilled in the art that the present invention may be practiced without these specific details.

The invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. It should be noted that the drawings are simplified and in non-precise proportion, so as to facilitate and clearly assist in explaining the embodiments of the present invention.

As shown in fig. 1, a schematic diagram of a management circuit of a multi-parallel battery system is illustrated, which includes a communication circuit and a wake-up circuit, wherein an energy storage converter PCS performs information interaction with the multi-parallel battery system through the communication circuit; the battery systems mutually exchange information through the wake-up circuit. The energy storage converter PCS carries out information interaction with the battery system through the communication circuit RS485/CAN, and the battery systems carry out information interaction through the wake-up circuit RS 485/CAN. When a certain battery system is under-voltage, the corresponding switch is disconnected, the offline sleep state is entered, and the communication with the energy storage converter PCS is also interrupted at the moment.

When the PCS CAN charge the battery system, a charging instruction is sent through the communication circuit RS485/CAN, and after the online battery system receives the charging instruction, the offline battery system is awakened through the awakening circuit RS 485/CAN. When the undervoltage battery system is awakened, the host in the multi-parallel battery system sends an instruction to control the charging switch corresponding to the undervoltage battery system to be switched on, and the energy storage converter PCS immediately charges the undervoltage battery system.

Although the embodiments have been described and illustrated separately, it will be apparent to those skilled in the art that some common techniques may be substituted and integrated between the embodiments, and reference may be made to one of the embodiments not explicitly described, or to another embodiment described.

The above-described embodiments do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the above-described embodiments should be included in the protection scope of the technical solution.

Claims

1. A management circuit of a multi-parallel battery system is characterized in that: the energy storage converter is in information interaction with a multi-parallel battery system through the communication circuit; the battery systems mutually carry out information interaction through the wake-up circuit;

2. The multi-parallel battery system management circuit of claim 1, wherein:

when a certain battery system is under-voltage, the charging switch corresponding to the battery system is switched off, the battery system enters an offline dormant state, and the communication between the battery system and the energy storage converter is interrupted.

3. The multi-parallel battery system management circuit of claim 2, wherein: when the undervoltage battery system is awakened, the host in the multi-parallel battery system sends an instruction to control the charging switch corresponding to the undervoltage battery system to be switched on, and the energy storage converter charges the undervoltage battery system.