US-12620742-B2 - Female terminal, socket, battery pack, power tool and power tool system

US12620742B2US 12620742 B2US12620742 B2US 12620742B2US-12620742-B2

Abstract

A female terminal, a socket, a battery pack, a power tool and a power tool system are provided to improve a problem of limited discharge capacity between a conventional battery pack and a power tool. The female terminal is used for an electrical connection with a male terminal, and the female terminal includes: a first electrical connector and a second electrical connector. The first electrical connector is provided with a first resilient opening to be electrically connected and inserted into the male terminal. The second electrical connector is arranged inside the first electrical connector, and is provided with a second resilient opening to be electrically connected and inserted into the male terminal. Wherein, during an electrical connection, the male terminal sequentially enters the first resilient opening and the second resilient opening in sequence, and is electrically connected to the first electrical connector and the second electrical connector.

Inventors

Haibin WANG

Assignees

GREENWORKS (JIANGSU) CO., LTD.

Dates

Publication Date: 20260505
Application Date: 20230414
Priority Date: 20220425

Claims (14)

1 . A female terminal, configured to be electrically connected with a male terminal, comprising: a first electrical connector, provided with a first resilient opening configured for an electrical connection and insertion of the male terminal, and a second electrical connector, arranged inside the first electrical connector, and provided with a second resilient opening configured for the electrical connection and insertion of the male terminal, wherein when electrically connected, the male terminal enters the first resilient opening and the second resilient opening in sequence and is electrically connected to the first electrical connector and the second electrical; wherein the first electrical connector comprises four first pin pieces, the second electrical connector comprises four second pin pieces, the four first pin pieces and the four second pin pieces are correspondingly inserted into a terminal fixing part, the four first pin pieces are distributed in a rectangular array, the four second pin pieces are distributed in the rectangular array, and the four second pin pieces are respectively close to an inner side of the four first pin pieces correspondingly.
2 . The female terminal according to claim 1 , wherein both the first electrical connector and the second electrical connector comprise at least one set of clamping parts, each set of the clamping parts comprises two clamping arms, the two clamping arms are arranged opposite to each other, and are bent toward each other to form the first resilient opening or the second resilient opening.
3 . The female terminal according to claim 2 , wherein the two clamping arms on both sides of the first resilient opening and/or the second resilient opening are respectively provided with protrusions, and the protrusions on the two clamping arms are correspondingly facing each other to form the first resilient opening or the second resilient opening.
4 . The female terminal according to claim 3 , wherein the protrusion includes an arc body and a connecting body, a first side of the connecting body is connected with the clamping arm, and a second side of the connecting body is connected with the arc body.
5 . The female terminal according to claim 4 , wherein a first side of the connecting body is smoothly connected with a first clamping arm in the clamping part through a rounded corner, and a second side of the connecting body is inclined to a second clamping arm arranged opposite thereto, an angle between the connecting body on the first electrical connector and an insertion direction of the male terminal is from 30° to 40° to decompose an extrusion force of the male terminal and enable the first electrical connector to hold the inserted male terminal stably, and an angle between the connecting body on the second electrical connector and the insertion direction of the male terminal is from 15° to 25°.
6 . The female terminal according to claim 4 , wherein a side of the arc body facing away from the connecting body is provided with a flange to guide an insertion of the male terminal.
7 . The female terminal according to claim 6 , wherein a first side of the flange is tangent to and connected with the side of the arc body facing away from the connecting body, a second side of the flange extends obliquely to an outside, an angle between the flange on the first electrical connector and the insertion direction of the male terminal is from 40° to 50°, and an angle between the flange on the second electrical connector and the insertion direction of the male terminal is from 50° to 60° to guide the male terminal and prevent the arc body from being rolled up toward the first resilient opening.
8 . The female terminal according to claim 2 , wherein the first electrical connector and/or the second electrical connector comprise two sets of clamping parts, the first resilient opening or the second resilient opening formed in each set of the clamping parts extends along a straight line, and the straight line is perpendicular to the insertion direction of the male terminal.
9 . The female terminal according to claim 1 , wherein the first resilient opening and the second resilient opening are distributed on a same insertion line, and a distance between the first resilient opening and the second resilient opening along the insertion line is from 10 mm to 15 mm.
10 . The female terminal according to claim 1 , wherein the first electrical connector and/or the second electrical connector comprise a limiting body, and the limiting body limits the second electrical connector.
11 . A power tool, wherein a tool interface of the power tool is provided with at least two female terminals according to claim 1 .
12 . A power tool system, comprising: a power tool, and a battery pack, electrically connected with the power tool through a male terminal and a female terminal according to claim 1 .
13 . A socket, configured to be electrically connected with a plug with two male terminals, comprising: at least two female terminals, configured to be electrically plugged with the two male terminals to form a current loop, the female terminal comprising: a first electrical connector, provided with a first resilient opening configured for an electrical connection and insertion of the male terminal, and a second electrical connector, arranged inside the first electrical connector, and provided with a second resilient opening configured for an electrical connection and insertion of the male terminal, wherein when electrically connected, the male terminal sequentially enters the first resilient opening and the second resilient opening in sequence, and is electrically connected to the first electrical connector and the second electrical connector; wherein the first electrical connector comprises four first pin pieces, the second electrical connector comprises four second pin pieces, the four first pin pieces and the four second pin pieces are correspondingly inserted into a terminal fixing part, the four first pin pieces are distributed in a rectangular array, the four second pin pieces are distributed in the rectangular array, and the four second pin pieces are respectively close to an inner side of the four first pin pieces correspondingly.
14 . A battery pack, a battery interface of the battery pack comprising: at least two female terminals, electrically connected with a positive pole and a negative pole of the battery pack respectively, the female terminal comprising: a first electrical connector, provided with a first resilient opening configured for an electrical connection and insertion of the male terminal, and a second electrical connector, arranged inside the first electrical connector, and provided with a second resilient opening configured for an electrical connection and insertion of the male terminal, wherein when electrically connected, the male terminal sequentially enters the first resilient opening and the second resilient opening in sequence, and is electrically connected to the first electrical connector and the second electrical connector; wherein the first electrical connector comprises four first pin pieces, the second electrical connector comprises four second pin pieces, the four first pin pieces and the four second pin pieces are correspondingly inserted into a terminal fixing part, the four first pin pieces are distributed in a rectangular array, the four second pin pieces are distributed in the rectangular array, and the four second pin pieces are respectively close to an inner side of the four first pin pieces correspondingly.

Description

TECHNICAL FIELD The disclosure relates to a field of power supplies, in particular to a female terminal, a socket, a battery pack, a power tool and a power tool system. BACKGROUND With the improvement of people's living standards, there are higher requirements for the quality of life and work. People's requirements for tools are getting higher and higher. In the lithium power tool industry, the discharge capacity of lithium battery packs is limited, and in the past it could only be applied to some products with low power. When the positive and negative poles are connected, high-power discharge often causes the temperature of the connection being too high due to the small contact area of the male terminal, which may cause the risk of melting the plastic parts and catching fire. Moreover, in previous products, the male terminals were placed side by side or front to back, which needs a lot of space. The conventional structure of the male terminals cannot meet the requirements of the battery pack for a small space volume. Therefore, it is necessary to provide a female terminal, socket, battery pack, power tool and power tool system to increase the discharge capacity between the battery pack and the power tool in a limited space. SUMMARY The disclosure provides a female terminal, a socket, a battery pack, a power tool and a power tool system, so as to relieve a problem of limited discharge capacity between a battery pack and a power tool. The disclosure provides the female terminal used to be electrically connected with a male terminal. The female terminal includes a first electrical connector and a second electrical connector. The first electrical connector is provided with a first resilient opening configured for an electrical connection and insertion of the male terminal. The second electrical connector is arranged inside the first electrical connector, and is provided with a second resilient opening configured for an electrical connection and insertion of the male terminal. Wherein, when electrically connected, the male terminal sequentially enters the first resilient opening and the second resilient opening in sequence, and is electrically connected to the first electrical connector and the second electrical connector. In an embodiment of the female terminal of the disclosure, both the first electrical connector and the second electrical connector includes at least one set of clamping parts, each set of the clamping parts includes two clamping arms, the two clamping arms are arranged opposite to each other, and are bent toward each other to form the first resilient opening or the second resilient opening. In an embodiment of the female terminal of the disclosure, the two clamping arms on both sides of the first resilient opening and/or the second resilient opening are respectively provided with protrusions, and the protrusions on the two clamping arms are correspondingly facing each other to form the first resilient opening or the second resilient opening. In an embodiment of the female terminal of the disclosure, the protrusion includes an arc body and a connecting body, a first side of the connecting body is connected with the clamping arm, and a second side of the connecting body is connected with the arc body. In an embodiment of the female terminal of the disclosure, a first side of the connecting body is smoothly connected with one of the clamping arms in the clamping part through a rounded corner, and a second side of the connecting body on the first electrical connector is inclined to a second clamping arm arranged opposite thereto, an angle between the connecting body on the first electrical connector and an insertion direction of the male terminal is from 30° to 40°, and an angle between the connecting body on the second electrical connector and the insertion direction of the male terminal is from 15° to 25°. In an embodiment of the female terminal of the disclosure, a side of the arc body facing away from the connecting body is provided with a flange to guide an insertion of the male terminal. In an embodiment of the female terminal of the disclosure, a first side of the flange is tangent to and connected with the side of the arc body facing away from the connecting body, a second side of the flange extends obliquely to an outside, an angle between the flange on the first electrical connector and the insertion direction of the male terminal is from 40° to 50°, and an angle between the flange on the second electrical connector and the insertion direction of the male terminal is from 50° to 60°. In an embodiment of the female terminal of the disclosure, the first electrical connector and/or the second electrical connector includes two sets of clamping parts, the first resilient opening or the second resilient opening formed in each set of the clamping parts extends along a straight line, and the straight line is perpendicular to the insertion direction of the male terminal. In an embodiment of the