CN209981414U

CN209981414U - Lithium battery protection plate

Info

Publication number: CN209981414U
Application number: CN201920782601.0U
Authority: CN
Inventors: 徐有旺
Original assignee: Shenzhen Simatic Technology Co Ltd
Current assignee: Shenzhen Simatic Technology Co Ltd
Priority date: 2019-05-28
Filing date: 2019-05-28
Publication date: 2020-01-21
Anticipated expiration: 2029-05-28

Abstract

The utility model discloses a lithium battery protection plate, which comprises a surface layer, a bottom layer, an IC chip and a fixed layer, wherein the surface layer and the bottom layer are stacked in sequence, and the surface layer is provided with a plurality of inclined through holes; the side wall of the IC chip is provided with a plurality of pins, and the pins penetrate into the bottom layer along the inclined through holes; the fixed layer is arranged at the contact position of the pin and the through hole on the surface layer. The utility model provides an antidetonation type lithium cell protection shield, increase of service life.

Description

Lithium battery protection plate

Technical Field

The utility model relates to a lithium battery protection shield technical field especially relates to a lithium battery protection shield.

Background

The lithium battery protection board is used for charging and discharging protection of the series lithium battery pack; when the battery pack is fully charged, the voltage difference between the single batteries can be ensured to be smaller than a set value (generally +/-20 mV), the uniform charging of the single batteries of the battery pack is realized, and the charging effect in a series charging mode is effectively improved. Simultaneously, the overvoltage, undervoltage, overcurrent, short circuit and overtemperature states of each single battery in the battery pack are detected, so that the service life of the battery is protected and prolonged; the undervoltage protection prevents each single battery from being damaged by overdischarge when the single battery is used for discharging.

However, the working environment of the lithium battery protection board is often accompanied by vibration (such as an electric vehicle in a running state). The fastness of fixing each electronic components on the lithium battery protection board has very big challenge under this kind of state. With the lapse of time, the circuit is disconnected to some electronics pin detinning very easily appear, perhaps shakes bad certain electronic components, finally leads to the lithium cell protection shield to become invalid.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an antidetonation type lithium cell protection shield, increase of service life.

The utility model discloses a technical scheme that lithium battery protection shield adopted is:

a lithium battery protection plate comprises a surface layer, a bottom layer, an IC chip and a fixing layer, wherein the surface layer and the bottom layer are sequentially stacked, and the surface layer is provided with a plurality of inclined through holes; the side wall of the IC chip is provided with a plurality of pins, and the pins penetrate into the bottom layer along the inclined through holes; the fixed layer is arranged at the contact position of the pin and the through hole on the surface layer.

As a preferred scheme, be equipped with the middle level between top layer and the bottom, the middle level is including fixed basic unit, fixed plate and the overburden that stacks in proper order, fixed basic unit is connected with the terminal surface that the bottom is close to the top, the overburden is connected with the terminal surface that the top is close to the bottom, the overburden is equipped with the breach, be equipped with a clearance in the breach region between fixed plate and the top, the clearance switches on with the through-hole.

Preferably, the through hole is inclined at an angle ranging from 45 ° to 70 °.

Preferably, the end parts of the through holes are all round corners.

Preferably, the material of the fixing layer is tin or palladium.

Preferably, the fixing plate is made of a metal plate.

The utility model discloses a lithium battery protection shield's beneficial effect is: the surface layer and the bottom layer are sequentially stacked, and the surface layer is provided with a plurality of inclined through holes; a plurality of pins on the side wall of the IC chip are deep into the bottom layer along the inclined through holes; the fixing layer is arranged at the contact position of the pin and the through hole of the surface layer to fix the pin on the surface layer. The pin inserts the through-hole of slope and makes the area of contact increase of the two, and then can produce great frictional force in order to resist the external force that vibrations produced after the fixed bed is fixed, consequently, prolongs the life of lithium battery protection board.

Drawings

Fig. 1 is a schematic structural diagram of the lithium battery protection plate of the present invention.

Fig. 2 is an enlarged view of a region a of the lithium battery protection plate of the present invention.

Detailed Description

The invention will be further elucidated and described with reference to the following embodiments and drawings in which:

referring to fig. 1, a lithium battery protection plate includes a surface layer 11, a bottom layer 12, a middle layer, an IC chip 20 and a fixing layer 30.

The surface layer 11 and the bottom layer 12 are sequentially stacked, and the surface layer 11 is provided with a plurality of inclined through holes 111. A plurality of leads 21 on the sidewalls of the IC chip 20 extend deep down to the bottom layer 12 along the inclined through holes 111. The fixing layer 30 is disposed at a contact portion of the lead 21 and the through hole of the surface layer 11 to fix the lead 21 to the surface layer 11. The pins 21 are inserted into the inclined through holes 111 to increase the contact area between the two, and then a large friction force is generated after the fixing layer 30 is fixed to resist the external force generated by vibration, thereby prolonging the service life of the lithium battery protection plate.

The fixing layer 30 in this embodiment is actually solder metal tin or palladium. The pin 21 is fixed on the surface layer by the molten welding metal, and the molten welding metal flows into the gap between the pin 1 and the through hole 111 in the process, so that the stability between the pin 1 and the through hole is enhanced.

Preferably, a middle layer is disposed between the surface layer 11 and the bottom layer 12, and the middle layer includes a fixing base layer 131, a fixing plate 132 and a covering layer 133 which are sequentially stacked. The fixing base layer 131 is connected with the end face of the bottom layer 12 close to the surface layer 11, the covering layer 133 is connected with the end face of the surface layer 11 close to the bottom layer 12, the covering layer 133 is provided with a notch 1331, a gap 40 is arranged between the fixing plate 132 and the surface layer 11 in the area of the notch 1331, and the gap 40 is communicated with the through hole 111. When the inserted pin 21 touches the fixing plate 132, the molten solder is poured to fill the gap and tightly fix the end of the pin 21 and the fixing plate 132. The fixing layer 30 forms an annular engaging portion, and the engaging portion cannot pass through the through hole 111, so that the overall structure is more stable. The fixing plate 132 of the present embodiment is made of a metal plate, so that the pins 21 and the metal plate are easily connected.

The through-hole 111 is inclined at an angle ranging from 45 ° to 70 °. The pins 21 are easily inserted in this angular range and provide a large contact area.

Referring to fig. 2, the ends of the through holes 111 are rounded to facilitate the insertion of the leads 21.

The utility model provides a lithium battery protection plate, wherein a surface layer and a bottom layer are sequentially stacked, and a plurality of inclined through holes are arranged on the surface layer; a plurality of pins on the side wall of the IC chip are deep into the bottom layer along the inclined through holes; the fixing layer is arranged at the contact position of the pin and the through hole of the surface layer to fix the pin on the surface layer. The pin inserts the through-hole of slope and makes the area of contact increase of the two, and then can produce great frictional force in order to resist the external force that vibrations produced after the fixed bed is fixed, consequently, prolongs the life of lithium battery protection board.

It should be finally noted that the above embodiments are only intended to illustrate the technical solutions of the present invention, and not to limit the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A lithium battery protection plate is characterized by comprising a surface layer and a bottom layer which are sequentially stacked, wherein the surface layer is provided with a plurality of inclined through holes;

the side wall of the IC chip is provided with a plurality of pins, and the pins penetrate deeply to the bottom layer along the inclined through holes;

and the fixing layer is arranged at the contact part of the pins and the through holes on the surface layer.

2. The lithium battery protection plate as claimed in claim 1, wherein a middle layer is disposed between the surface layer and the bottom layer, the middle layer includes a fixing base layer, a fixing plate and a covering layer stacked in sequence, the fixing base layer is connected to an end surface of the bottom layer adjacent to the surface layer, the covering layer is connected to an end surface of the surface layer adjacent to the bottom layer, the covering layer is provided with a notch, a gap is disposed between the fixing plate and the surface layer in the notch area, and the gap is in communication with the through hole.

3. The lithium battery protection plate as claimed in claim 1, wherein the inclination angle of the through-hole is in a range of 45 ° to 70 °.

4. The lithium battery protection plate as claimed in claim 1, wherein the ends of the through-holes are rounded.

5. The lithium battery protection plate as claimed in any one of claims 1 to 4, wherein a material of the fixing layer is tin or palladium.

6. The lithium battery protection plate as claimed in claim 2, wherein the material of the fixing plate is a metal plate.