Combination of electric power tool and battery pack

Abstract

The invention discloses a combination of an electric power tool and a battery pack, which comprises an electric power tool and a battery pack, wherein the battery pack comprises a first detection device and a second detection device; the electric power tool is internally provided with a control device, the first detection device and the second detection device are respectively used for detecting voltage of a single battery in the battery pack and temperature of the battery pack, the signal of the first detection device is primarily processed in the battery pack and then transmitted to the control device in the electric power tool through one conductive terminal; the signal of the second detection device is not pressed in the battery pack and directly transmitted to the control device in the electric power tool through another conductive terminal; and the control device is used for realizing over-discharge protection on the battery pack according to the signals of the first detection device and the second detection device. According to the design, the structure of the battery pack can be simplified and the design cost of the battery pack is lowered.

Description

technical field [0001] The invention relates to a combination of an electric tool and a battery pack. Background technique [0002] In recent years, with the development of battery material technology, the capacity of batteries has been greatly improved, and its application range has also extended from some low-power electronic electrical devices to some high-power power electrical devices, such as electric tools Wait. In this way, the electric tool using the high-rate battery can be freed from the shackles of cables and can be used anytime and anywhere. In order to improve the utilization rate, these batteries usually adopt rechargeable batteries, such as nickel-cadmium (Nickel-cadmium, NiCd) batteries, nickel-metal hydride (Nickel-Metal Hydride, NiMH) batteries, lithium-ion (Lithium-ion, L-ion) battery etc. [0003] The above-mentioned type of battery is in a discharge state when working with a cordless electrical device. When the battery is discharged, when the voltage...

AI Technical Summary

Problems solved by technology

However, in this scheme, the signals detected by all detection devices need to be preliminarily processed in the battery pack, and then sent to the control device through a unified signal port, thereby increasing the signal processing design of the detection signal in the battery pack, The design structure of the battery pack is more complicated, and the design cost is also higher

[0006] In the above schemes, the design structure of the battery pack is relatively complicated, and the design cost is relatively high. In the process of product sales, two battery packs are generally configured for one electric tool. If the design structure of the battery pack is complicated and the design cost is high , will inevitably increase the overall cost, so a battery pack with a simpler design structure and lower cost is required

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