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Two-parallel multi-battery pack reverse connection protection circuit

A technology for reverse polarity protection circuits and battery packs, which is applied to emergency protection circuit devices, electrical components, etc., and can solve problems such as inability to effectively identify and protect circuits

Pending Publication Date: 2019-04-16
ZHEJIANG KAIYAO LIGHTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, its disadvantage is that it can only work on the reverse connection of the power supply as a whole, and cannot effectively identify and protect the circuit when some circuits of the power supply are reversed.

Method used

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  • Two-parallel multi-battery pack reverse connection protection circuit

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Embodiment 1

[0018] A two-parallel battery pack reverse connection protection circuit, such as figure 1 As shown, it is the circuit schematic diagram of the quick start circuit of the first embodiment. The battery packs A and B supply power to the load together. The battery packs A and B are respectively composed of 8 1.5V lithium batteries. When all are positively connected, the battery pack voltage is 12V. When there is a reverse connection, if 1 cell is reversed and 7 cells are connected positively, the voltage of a single battery pack is 9V; if two cells are reversed, the voltage of a single battery pack is 6V; and so on.

[0019] Battery packs A and B are composed of eight 1.5V lithium batteries connected in series. The negative pole of battery pack A is connected to the negative pole of battery pack B, and connected to C1, C2, C3, C4, C5, C6, R2, R4, R6, The second end of R8 is connected with the second end of U1U2 and the fourth end of U3. The positive pole of the battery pack A is...

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PUM

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Abstract

The invention discloses a two-parallel multi-battery pack reverse connection protection circuit, which comprises a battery pack A, a battery pack B, an A pack sampling circuit, a B pack sampling circuit and a comparison control circuit, wherein the A pack sampling circuit is used for acquiring the actual voltage of the battery pack A; the B pack sampling circuit is used for acquiring the actual voltage of the battery pack B; and the A pack sampling circuit and the B pack sampling circuit provide power for the comparison control circuit, the first input end is electrically connected with the Apack sampling circuit, the second input end is electrically connected with the B pack sampling circuit, the first control end controls the battery pack A to be connected with the circuit output end, and the second control end controls the battery pack B to be connected with the circuit output end. In application of an LED lighting product with the multi-series and two-parallel batteries as a powersupply, when the circuit disclosed in the invention is used, a phenomenon that in the case of reverse connection of one path of batteries, a voltage difference is generated between two parallel paths, the path with reverse connection batteries generates reverse current, and the batteries generate heat and are even burnt down can be effectively avoided.

Description

technical field [0001] The invention belongs to the field of LED lighting circuits, and in particular relates to a reverse connection protection circuit for two parallel and multiple battery packs. Background technique [0002] With the country's vigorous promotion of energy-saving products, the market demand for LED lighting products is increasing. Especially in LED lighting applications, there are more and more portable LED products that use various types of batteries as power sources, such as mirror lights, flashlights and so on. However, this type of battery-powered product has a defect. When the number of batteries connected in parallel is greater than or equal to 2, the risk of reverse connection of the battery cannot be avoided when the customer uses it. If the battery is reversed, it will not affect the customer's use of the product or the customer is not easy to detect when the product is used. Due to the different potential of the two battery packs connected in pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/18
CPCH02H7/18
Inventor 吴梢翔
Owner ZHEJIANG KAIYAO LIGHTING