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Low-voltage lithium battery pack battery management system

A technology of battery management system and lithium battery pack, applied in the direction of battery disconnect circuit, battery circuit device, secondary battery, etc., can solve the problems of no active current limit, single function, poor integration, etc. Simple, avoids the effect of monomer overpressure

Pending Publication Date: 2020-07-10
青岛创信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

[0009] Aiming at the shortcomings of the battery management system in the prior art, such as single function, poor integration, decentralized strategy, and no active current limiting, the present invention provides a low-voltage lithium battery with complete functions, high integration, centralized strategy, and priority-based current limiting. Pack battery management system

Method used

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  • Low-voltage lithium battery pack battery management system
  • Low-voltage lithium battery pack battery management system
  • Low-voltage lithium battery pack battery management system

Examples

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Embodiment Construction

[0053] For ease of understanding, the technical solutions of the present invention are further specifically described below in conjunction with the accompanying drawings and through embodiments:

[0054] Such as Figure 1-Figure 3 As shown, a low-voltage lithium battery battery management system includes a power supply module, a current sensor signal sampling module, a switch value acquisition module, a charging relay driver module, a load relay driver module, a temperature management relay driver module, a communication module, and a single voltage Sampling module, module temperature sampling module, passive equalization module, voltage monitoring module, MCU module, crystal oscillator module, wake-up switch, current sensor, load request switch, positive fuse, load circuit relay, charging relay, charging terminal, cooling fan relay, Electric heating relays, cooling fans, electric heaters, single battery series modules, temperature sensors and output terminals of battery packs...

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Abstract

The invention discloses a low-voltage lithium battery pack battery management system. The system comprises a power supply module, a current sensor signal sampling module, a switching value acquisitionmodule, a load relay driving module, a charging relay driving module, a temperature management relay driving module, a communication module, a single voltage sampling module, a module temperature acquisition module, a passive equalization module, a voltage monitoring module, an MCU module and a crystal oscillator module. The structure is simple, stable and reliable, the voltage consistency of thesingle battery cells is ensured, and meanwhile, single-battery overvoltage is avoided; sampling of voltage and resistance values is facilitated; the voltage value acquisition and calculation principle is simple, the cost is low and the reliability is high; connection and disconnection control of each load loop can be realized; heat dissipation or heating of a matched lithium battery pack is actively realized; and when over-current occurs, the battery management system actively disconnects the charging relay to protect the lithium battery pack.

Description

technical field [0001] The invention belongs to the technical field of electronic control, and in particular relates to a battery management system for a low-voltage lithium battery pack. Background technique [0002] Lithium battery is a type of battery that uses lithium metal or lithium alloy as the negative electrode material and uses a non-aqueous electrolyte solution. Due to the very active chemical properties of lithium metal, the processing, storage and use of lithium metal have very high environmental requirements. With the development of science and technology, lithium batteries have become the mainstream. Due to the advantages of high energy density, long life, and almost no environmental pollution, lithium-ion batteries have attracted more and more attention. As an important energy storage power source, it is widely used in new energy vehicles, household energy storage, vehicle energy storage, grid energy storage, etc. Due to the narrow operating temperature ra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/42H01M10/48H01M10/613H01M10/615H01M10/6563H01M10/6567H01M10/657H02J7/00H02H7/18
CPCH01M10/4207H01M10/425H01M10/482H01M10/486H01M10/613H01M10/615H01M10/6563H01M10/6567H01M10/657H01M2010/4271H01M2010/4278H02H7/18H02J7/0013H02J7/0014H02J7/0031H02J7/0063H02J7/0068Y02E60/10
Inventor 王玉海李连强杜建伟孙义荣封富尧闫鑫张昭煜
Owner 青岛创信新能源科技有限公司
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