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Lithium battery management system

A management system, lithium battery technology, applied in lithium batteries, secondary batteries, battery circuit devices, etc., can solve the problems of hidden dangers, poor reliability, high cost, and achieve safe work, strong anti-interference ability, and enhanced reliability. Effect

Active Publication Date: 2010-09-15
CHONGQING CHANGAN AUTOMOBILE CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1: Use a distributed method to manage the lithium battery module group individually by sub-board. This method results in a large and complex management system, waste of space, high cost, poor reliability, and is not conducive to practical application.
[0005] Two: The detection of the insulation performance of the lithium battery system is not perfect. Due to the high voltage of the power battery system, if the insulation performance of the lithium battery system cannot be detected accurately in real time, it will bring great harm to the vehicle and personal safety. danger
[0006] Three: The high voltage relay of the lithium battery system has not been protected and diagnosed, so that the working status of the high voltage relay cannot be fed back in time, resulting in potential safety hazards in the power battery system and the entire vehicle

Method used

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Embodiment Construction

[0028] Some modules of the lithium battery management system will be further described below in conjunction with the accompanying drawings.

[0029] figure 1 It is a block diagram of the overall structure of the lithium battery management system. The lithium battery management system includes: MCU (microprocessing) module, power module, total voltage acquisition module, current acquisition module, insulation detection module, relay control and diagnosis module, HANDSHAKE (handshake signal) transceiver module, CAN transceiver module, Volatile memory modules and battery module monitoring units 1, 2...N.

[0030] figure 2 It is a schematic diagram of the relay control and diagnosis module. The module receives the control signal from the MCU I / O port through the input terminals IN0, IN1, IN2, and IN3 of the FET pre-driver chip V1, and the FET pre-driver chip V1 outputs OUT0 and OUT1 , OUT2, OUT3 are respectively connected to the gates of field effect transistors Q1, Q2, Q3, Q4...

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Abstract

The invention provides a lithium battery management system, which consists of the following modules: a microprocessor control unit (MCU) module, a power module, a total voltage acquisition module, a current acquisition module, an insulation detection module, a relay control and diagnosis module, a HANDSHAKE (handshake signal) receiving and transmitting module, a CAN transceiver module, a non-volatile memory module and battery module monitoring units 1, 2,..., and N. The management system can monitor voltages of lithium battery monomers in real time, and performs balance control on the battery monomers with large status differences to improve the consistency of a lithium battery system. Simultaneously, the management system can also perform comprehensive monitoring and management on the total voltage, the working current, the temperature, the insulating state and the battery SOC\SOH of the lithium battery system, and transmit data to other electric control systems of an entire car through a CAN network in real time. The lithium battery management system can accurately monitor and control the state of the lithium battery system, and can give full play to the performance of the battery system and guarantee that the lithium battery system runs safely and reliably.

Description

technical field [0001] The invention belongs to the field of management systems for vehicle power battery systems, and in particular relates to a management system for lithium batteries. Background technique [0002] With the increasing awareness of energy saving and environmental protection in the world, the development of new energy vehicles is gradually expanding. The power battery system is a key part of new energy vehicles. The types of power batteries currently used in new energy vehicles include: lead-acid batteries, nickel metal hydride batteries , Nickel-cadmium batteries and lithium batteries. Lithium batteries have been widely used in the field of new energy vehicles because of their small size, high energy density, long storage life, no memory effect, high voltage and low self-discharge rate. On the other hand, in order to ensure the safe operation of the lithium battery system and give full play to the performance of the lithium battery system, it is necessary ...

Claims

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Application Information

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IPC IPC(8): H02J7/00H02H7/18
CPCY02E60/12H01M10/482B60L3/0046H01M2010/4271B60L3/0069H01M2010/4278H01M10/052H01M10/425Y02T10/7011B60L58/24Y02E60/10Y02T10/70
Inventor 朴昌浩张友群肖利华王进苏岭周安健任勇
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD
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