Lithium battery module based on metal expansion memory switch protector

Abstract

The invention discloses a lithium battery module based on a metal expansion type memory switch protector. A battery pack composed of 4 lithium battery cells connected in series, and filled with a thermal insulation layer. A metal expansion memory switch protector is installed in the right chamber. The memory switch protector is connected to the positive pole. The metal expansion memory switch protector includes 5 cell monitoring signal receiving ends, which are connected to the positive and negative electrodes of 4 lithium battery cells in turn. There is an emergency switch on the module shell. Manual recovery button. The invention utilizes metal expansion memory switch protectors to carry out modular processing on lithium batteries. In addition to direct application, it can also be used in a certain range of series and parallel applications. It is not only safe and reliable, but also simple and durable, completely overturning the traditional and complicated use of lithium battery packs. Way.

Description

technical field [0001] The invention relates to a lithium battery, in particular to a lithium battery module based on a metal expansion memory switch protector. Background technique [0002] Nowadays, power lithium-ion batteries are more and more widely used in various equipment, including automobiles, UPS, power storage, and field power. It has the advantages of large capacity and small size, and is gradually replacing traditional lead-acid batteries, and is the mainstream of the current battery market. However, when a lithium-ion battery encounters abnormal conditions such as short circuit and overcharge, it is easy to cause the battery to heat up violently. If there are no protective measures at this time, vicious accidents such as explosion and combustion will occur. This is also the main technical difficulty of current lithium-ion batteries. one. Therefore, lithium-ion batteries must be equipped with overvoltage, overtemperature, and overcurrent protection devices to ...

AI Technical Summary

Problems solved by technology

Although switching devices such as disconnect relays and MOSFETs are flexible in application and quick in action, due to the complexity of peripheral control and drive circuits, the overall reliability of the system is low, and semiconductor devices such as MOSFETs and IGBTs have poor anti-interference ability and current shock resistance. Poor problems; while relays have defects such as slow action, large drive current, and bulky devices

[0004] In the grouping process of existing lithium-ion battery packs, there are many control points. When power lithium-ion batteries need to be used in series and parallel, the management is very complicated. Often, the cost of a battery pack system and the protection system account for more than half of the total cost.

On the other hand, in power tools, electric bicycles, small energy storage and other application fields, a certain number of batteries must be connected in series and parallel to achieve the voltage and capacity required by the application, but the above-mentioned relays, MOSFETs, IGBTs and other switching devices have a short life. , poor stability, weak anti-interference ability, weak high-voltage resistance and other defects. For example, the peak current reaches 400A at the moment of ignition of a traditional car used for a 12V battery. Under normal circumstances, it is difficult to have a traditional protector that can withstand this surge current. For example, MOSFETs are often impacted by such surge currents and are easily damaged

[0005] In summary, due to the defects of the overvoltage, overtemperature and overcurrent protection devices of the existing lithium-ion batteries, the application and application of lithium-ion batteries in the fields of automobiles, UPS, electric energy storage, and field electricity have been severely limited. develop

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