Electrical Connection Terminal and Battery Pack Signal Acquisition Device

An electrical connection terminal includes a welding part welded to a solder pad of a battery pack cell to be electrically connected to the battery pack cell, a press fitting part pressed into a hole on a battery pack signal acquisition board to be electrically connected to the battery pack signal acquisition board, and an elastic part connected between the welding part and the press fitting part. The press fitting part is elastically floated in a length direction of the electrical connection terminal relative to the welding part.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the benefit of the filing date under 35 U.S.C. § 119(a)-(d) of Chinese Patent Application No. 202211192329.3, filed on Sep. 28, 2022.

FIELD OF THE INVENTION

The present invention relates to an electrical connection terminal used for electrical connection between a battery pack cell and a battery pack signal acquisition board, as well as a battery pack signal acquisition device including the electrical connection terminal.

BACKGROUND

In order to achieve electrical connection between a battery pack cell and a battery pack signal acquisition board, it is generally necessary to first connect the battery pack cell to a flexible printed circuit board using a cable, then connect the flexible printed circuit board to a bus connector through a flexible flat cable, and finally connect it to the battery pack signal acquisition board through a bus connector. This leads to a long data transmission path between the battery pack cells and the battery pack signal acquisition board, which increases costs and reduces signal transmission quality.

SUMMARY

An electrical connection terminal includes a welding part welded to a solder pad of a battery pack cell to be electrically connected to the battery pack cell, a press fitting part pressed into a hole on a battery pack signal acquisition board to be electrically connected to the battery pack signal acquisition board, and an elastic part connected between the welding part and the press fitting part. The press fitting part is elastically floated in a length direction of the electrical connection terminal relative to the welding part.

DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS

As shown inFIGS.1to5, in an exemplary embodiment of the present invention, an electrical connection terminal3is disclosed. The electrical connection terminal3includes a welding part31, a press fitting part32, and an elastic part33. The welding part31is welded to a solder pad11of a battery pack cell10for electrical connection with the battery pack cell10. The press fitting part32is pressed into a hole21on a battery pack signal acquisition board2to electrically connect with the battery pack signal acquisition board2. The elastic part33is connected between the welding part31and the press fitting part32, so that the press fitting part32can be elastically floated in the length direction Y of the electrical connection terminal3relative to the welding part31.

As shown inFIGS.1and2, in the illustrated embodiments, the battery pack1on a new energy vehicle typically includes multiple battery pack cells10, which are arranged in groups to supply power to the electric motor.

As shown inFIG.3, in the illustrated embodiments, the electrical connection terminal3has a first end (lower end inFIG.3) and a second end (upper end inFIG.3) opposite in its length direction Y. The welding part31and the press fitting part32are located at the first end and second end of the electrical connection terminal3, respectively, as shown inFIG.2.

As shown inFIGS.3and4, in the illustrated embodiments, the welding part31includes a first welding foot311and a second welding foot312. The first welding foot311and the second welding foot312are respectively located at both sides of the width direction X of the electrical connection terminal3and extend in opposite directions in the thickness direction Z of the electrical connection terminal3.

In the illustrated embodiments, the first welding foot311and the second welding foot312have a flat bottom surface, and the bottom surface of the first welding foot311and the bottom surface of the second welding foot312are located in the same plane and welded to the surface of the solder pad11of the battery pack cell10in a surface mount manner.

As shown inFIGS.3and4, in the illustrated embodiments, the elastic part33includes a first elastic arm331and a second elastic arm332. The first elastic arm331and the second elastic arm332are respectively located at both sides of the width direction X of the electrical connection terminal3and are bent into arches in opposite directions in the thickness direction Z of the electrical connection terminal3.

As shown inFIGS.3and4, in the illustrated embodiments, the elastic part33further includes a first limit part333and a second limit part334. The first limit part333and the second limit part334are spaced relative to each other by a predetermined distance in the length direction Y of the electrical connection terminal3, in order to limit the maximum elastic deformation of the first elastic arm331and the second elastic arm332, so that the maximum floating amount of the press fitting part32relative to the welding part31does not exceed a predetermined value. In the illustrated embodiments, the first limit part333and the second limit part334are located between the first elastic arm331and the second elastic arm332and extend along the length direction of the electrical connection terminal3.

As shown inFIG.5, in the illustrated embodiments, the press fitting part32includes a first arc-shaped rib321and a second arc-shaped rib322opposite to each other in the width direction X of the electrical connection terminal3. The two ends of the first arc-shaped rib321and the second arc-shaped rib322are connected to each other to form a fisheye shaped pressing structure. The fisheye shaped pressing structure is suitable for interference fit with the hole21on the battery pack signal acquisition board2.

As shown inFIG.5, in the illustrated embodiments, the press fitting part32further includes a first reinforcing rib323and a second reinforcing rib324connected between the first and second arc-shaped ribs321and322. The first and second reinforcing ribs323and324are bent into arches in opposite directions in the thickness direction Z of the electrical connection terminal3.

As shown inFIG.4, in the illustrated embodiment, the electrical connection terminal3also includes a guide end part36. The guide end part36is connected to the press fitting part32and extends a predetermined length from the press fitting part32along the length direction Y of the electrical connection terminal3to guide the press fitting part32into the hole21on the battery pack signal acquisition board2.

As shown inFIGS.3and4, in the illustrated embodiment, the electrical connection terminal3further includes a first connection part34, which is in a plate shape and connected between the welding part31and the elastic part33. In the illustrated embodiment, the size of the first connection part34in the width direction X of the electrical connection terminal3is equal to the size of the welding part31in the width direction X of the electrical connection terminal3. The size of the first connection part34in the width direction X of the electrical connection terminal3is equal to the size of the elastic part33in the width direction X of the electrical connection terminal3.

As shown inFIGS.3and4, in the illustrated embodiment, the electrical connection terminal3further includes a second connection part35, which is in a plate shape and connected between the elastic part33and the press fitting part32. In the illustrated embodiment, the second connection part35includes: a first part351connected to the elastic part33; and a second part352connected to the press fitting part32. The first part351and the second part352are connected to each other, and the size of the first part351in the width direction X of the electrical connection terminal3is greater than the size of the second part352in the width direction X of the electrical connection terminal3.

In the illustrated embodiments, the size of the first part351of the second connection part35in the width direction X of the electrical connection terminal3is equal to the size of the elastic part33in the width direction X of the electrical connection terminal3. The size of the second part352of the second connection part35in the width direction X of the electrical connection terminal3is slightly larger than the size of the press fitting part32in the width direction X of the electrical connection terminal3.

In the illustrated embodiment, the electrical connection terminal3is an integral stamped terminal formed by stamping a metal sheet. This can reduce manufacturing costs.

In another exemplary embodiment of the present invention, a battery pack signal acquisition device is also disclosed. The battery pack signal acquisition device includes a battery pack signal acquisition board2and an electrical connection terminal3, as shown inFIGS.1and2. A hole21is formed on the battery pack signal acquisition board2. The press fitting part32of the electrical connection terminal3is pressed into the hole21on the battery pack signal acquisition board2to avoid welding, in order to achieve mechanical and electrical connection with the battery pack signal acquisition board2. The welding part31of the electrical connection terminal3is used for welding to the solder pad11of the battery pack cell10to electrically connect with the battery pack cell10.

As shown inFIG.2, in the illustrated embodiment, multiple holes21are formed on the battery pack signal acquisition board2, and the multiple holes21are arranged in an array with multiple rows and columns. The battery pack signal acquisition device includes multiple electrical connection terminals3, which are respectively pressed into multiple holes21.

In the aforementioned exemplary embodiments of the present invention, the battery pack cell and the battery pack signal acquisition board are electrically connected by the electrical connection terminal, which greatly shortens the data transmission path between the battery pack cell and the battery pack signal acquisition board, improves the reliability of signal acquisition, and can reduce the cost of the battery pack signal acquisition device.

In addition, in the aforementioned exemplary embodiments according to the present invention, the press fitting part of the electrical connection terminal is pressed onto the battery pack signal acquisition board in a welding free manner, which is very convenient to use. Moreover, the electrical connection terminal also has an elastic floating structure with shockproof buffer function, which can effectively prevent the electrical connection terminal from loosening due to vibration, ensuring the reliability of the electrical connection between the electrical connection terminal and the battery pack cell, as well as between the electrical connection terminal and the battery pack signal acquisition board.