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Extensible battery protection method

A technology for batteries and protection chips, which is used in the repair/maintenance of secondary batteries, secondary batteries, circuits, etc., can solve the problems of high overhead and high power consumption of cascaded hardware, and achieve the purpose of reducing power consumption, realizing protection and reducing power consumption. The effect of hardware overhead

Inactive Publication Date: 2020-07-10
点晶微(厦门)集成电路有限公司
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Problems solved by technology

[0004] The purpose of the present invention is to provide a scalable battery protection method in order to solve the problems of high overhead and high power consumption of the existing lithium battery cascade hardware

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specific Embodiment approach 1

[0021] Specific implementation mode one: the following combination figure 1 and figure 2 Describe this implementation mode, a scalable battery protection method described in this implementation mode, see figure 1 The cascade schematic diagram when working for the battery management system includes a main controller and several battery protection chips, each of which can complete the collection of battery voltage characteristic data and data transmission. At most 5n cascaded lithium batteries are controlled by n protection chips; the method is:

[0022] Connect n protection chips in series, and each protection chip controls 5 lithium batteries. The first protection chip is the uppermost chip (located on the positive side of the cascaded lithium battery), and the nth protection chip is the bottom chip (located on the positive side of the cascaded lithium battery). battery negative side), the rest are intermediate chips, and any two adjacent protection chips are master-slave d...

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Abstract

The invention discloses an extensible battery protection method, belongs to the field of lithium batteries, and aims to solve the problems of high cost and high power consumption of existing lithium battery cascade hardware. According to the method, at most 5n cascaded lithium batteries are controlled by n protection chips; the method comprises the steps that n protection chips are connected in series, the first protection chip is an uppermost layer chip, the nth protection chip is a lowermost layer chip, the rest protection chips are middle layer chips, and any two adjacent protection chips are master-slave equipment; a configuration signal of the main controller is transmitted to the first protection chip from the nth protection chip step by step so as to control the on-off state of a charging and discharging loop of any protection chip, and battery parameter data of the first protection chip to the (n-1) th protection chip are transmitted to the n-th protection chip step by step.

Description

technical field [0001] The invention relates to lithium battery cascading control technology and belongs to the field of lithium batteries. Background technique [0002] With the rapid development of the information electronics era, lithium batteries are widely used in mobile phones and light electric vehicles due to their good characteristics. However, the chemical characteristics of lithium batteries are active. If there is overcharge, overdischarge or overcurrent during battery use, it will cause battery damage. There are dangers such as explosion, so a supporting battery management chip is required for protection during work. The rated voltage of a single lithium battery is 3.6V, which cannot meet the needs of high-voltage power supply occasions, so multiple lithium batteries need to be used in series. However, lithium battery protection chips on the market generally support up to 5 batteries in series, so for power tools and other occasions that require far more than 5...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/42
CPCH01M10/4207H01M10/425H01M2010/4271H01M2010/4278Y02E60/10
Inventor 徐良良唐飞
Owner 点晶微(厦门)集成电路有限公司
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