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Relay health state recording system for quick changing of power battery pack

A technology for recording system and health status, applied in the field of automotive power, can solve the problems of shortening the service life, not including the health status information of the main circuit and charging circuit relays, etc., to prevent data overflow and reduce the amount of calculation.

Inactive Publication Date: 2018-08-17
苏州正力新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It does not include the health status information of the main circuit and charging circuit relays, etc.
However, when the power contact of the relay is operated by a large current or a large current load, its service life will be shortened.

Method used

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  • Relay health state recording system for quick changing of power battery pack
  • Relay health state recording system for quick changing of power battery pack
  • Relay health state recording system for quick changing of power battery pack

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] This relay health status recording system for quick-change power battery packs is equipped with a current sensor connected in series with the contacts of the main relay on the main circuit of the power battery system, and the current sensor transmits the detected current value to the The central processing unit of the battery management system, the data line 1 can be a bus, or an analog signal line with current signal characteristics. It also includes an external storage unit independent of the battery management system, which is connected to the battery management system through the data line 3. The battery management system judges the value of the current flowing through the relay transmitted by the current sensor read from the data line 1, combined with the current operating state of the relay, and decides whether to record the current value according to the judgment result. The basis for its judgment is:

[0026] Current value greater than I 设定 And when the relay ...

Embodiment 2

[0032] This relay health status recording system for quick-change power battery packs is equipped with a current sensor connected in series with the contacts of the main relay on the main circuit of the power battery system, and the current sensor transmits the detected current value to the The central processing unit of the battery management system, the data line 1 can be a bus, or an analog signal line with current signal characteristics, and also includes a storage unit, which is independent of the central processing unit inside the battery management system A storage unit, the independent storage unit is connected to the central processing unit through the data line 3, and the central processing unit judges the received current value, and stores the qualified current value in the storage unit, and the judgment basis is:

[0033] Current value greater than I 设定 And when the relay contact does not act, the storage current I 持续 intensity value and duration;

[0034] Curren...

Embodiment 3

[0039] This relay health status recording system for quick-change power battery packs is equipped with a current sensor connected in series with the contacts of the main relay on the main circuit of the power battery system, and the current sensor transmits the detected current value to the The central processing unit of the battery management system, the data line 1 can be a bus, or an analog signal line with current signal characteristics, and also includes a storage unit. The storage unit is a storage unit integrated in the central processing unit of the battery management system. The central processing unit judges the received current value and stores the qualified current value in the storage unit. The judgment basis is:

[0040] Current value greater than I 设定 And when the relay contact does not act, the storage current I 持续 intensity value and duration;

[0041] Current value greater than I 设定 And when the relay contacts act, the storage current I 动作 ;

[0042] The...

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Abstract

The invention discloses a relay health state recording system for quick changing of a power battery pack. A current sensor connected in series with a contact of a main relay is arranged at a main circuit of a power battery system and is used for transmitting a detected current value to a central processor unit of a battery management system; the central processor unit determines the received current value and stores one current value meeting the condition into a storage unit. According to the invention, with an external memory or a memory arranged inside the central processing unit of the battery management system, current data of the main contact of the relay are stored. The recorded data are stored in a non-volatile memory and are carried by the power battery pack all the time; and whenthe battery pack needs to be replaced for charging or maintenance, the staff can read the relay health information in the battery pack at any time to diagnose the health state of the relay in the battery pack so as to replace the relay with the poor health state.

Description

technical field [0001] The invention belongs to the field of automobile power, and more specifically relates to an information storage system capable of recording the health state of a relay in a quick-change power battery pack. Background technique [0002] The energy source of pure electric vehicles is mainly the power battery pack loaded on the vehicle. After a period of use, when the remaining energy in the power battery pack is too low, the mileage that the electric vehicle can travel (also known as "cruising range") gradually becomes shorter. To solve this problem, there are two ways, one is to charge the power battery of the electric vehicle in time, and the other is to replace the current battery pack with a fully charged or higher battery pack, also known as "battery replacement technology". . [0003] In the existing battery replacement technology, the information about the battery pack (the old pack that was replaced and the new pack that was replaced) is only m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/327
CPCG01R31/3278
Inventor 刘祥梁策周楠
Owner 苏州正力新能源科技有限公司
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