Battery pack with housing made of two materials

Patent metadata

Field	Value
Publication number	US-12080904-B2
Application number	US-201716348467-A
Country	US
Kind code	B2
Filing date	Nov 9, 2017
Priority date	Nov 9, 2016
Publication date	Sep 3, 2024
Grant date	Sep 3, 2024

Abstract

The present disclosure provides a battery pack including a housing, wherein the housing has a bottom portion, on which are disposed a first length side wall and a second length side wall that extend upward along a length direction of the bottom portion and are oppositely disposed, and a first width side wall and a second width side wall that extend upward along a width direction of the bottom portion and are oppositely disposed; the housing comprises a first step and a second step disposed at two ends of the first length side wall; the housing further comprises a first metal wiring terminal and a second metal wiring terminal, wherein the first metal wiring terminal and the second metal wiring terminal are disposed on the first step and the second step, respectively; a material for bearing the first metal wiring terminal and the second metal wiring terminal is a first plastic material, while other parts of the housing are made of a second plastic material, or most of other parts of the housing are made of the second plastic material. The two materials have different characteristics suitable for a requirement of the battery pack on the material.

First claim

We claim:

1. A battery pack comprising:
a housing having a bottom portion, oppositely disposed first length side wall and second length side wall extended upward along a length direction of the bottom portion and oppositely disposed first width side wall and second width side wall extended upward along a width direction of the bottom portion, wherein the housing defined by the bottom portion, the first length side wall, the second length side wall, the first width side wall and the second width side wall being closed at the bottom portion and four side walls, wherein the four side walls are the first length side wall, the second length side wall, the first width side wall and the second width side wall, and having an upper portion opening;
an upper cover positioned over the housing for covering the upper portion opening;
wherein the housing comprises:
a first step and a second step configured at two ends of the first length side wall; and
a first metal wiring terminal and a second metal wiring terminal disposed on the first step and the second step, respectively;

wherein the battery pack further comprises a first metal sheet and a second metal sheet, with the first metal wiring terminal and the second metal wiring terminal disposed on a first end of the first metal sheet and a first end of the second metal sheet, respectively; and
a first leading-out terminal and a second leading-out terminal, with each of the first leading-out terminal and the second leading-out terminal disposed at the second end of the first metal sheet and a second end of the second metal sheet, respectively, such that the first metal wiring terminal and the second metal wiring terminal are electrically conducted to the first leading-out terminal and the second leading-out terminal, respectively, the first leading-out terminal and the second leading-out terminal being in electrically conductive connection to positive output ends and negative output ends of multiple serially-connected battery cells disposed in the housing, respectively;
wherein the first end of the first metal sheet and the first end of the second metal sheet embedded in a first plastic substrate and a second plastic substrate made of a first plastic material having a first chemical composition, while other parts of the housing are made of a second plastic material having a second chemical composition different from the first plastic material, wherein the second end of the first metal sheet and the second end of the second metal sheet embedded in the first plastic material.

2. The battery pack according to claim 1 , characterized in that:
at two junctions of the first length side wall with end portions of the first width side wall and the second width side wall, the first length side wall is bent at the ends thereof towards the second length side wall, and the end portions of the first width side wall and the second width side wall close to the first length side wall are bent towards each other respectively, so as to form the first step and the second step at the two junctions of the ends of the first length side wall with the first width side wall and the second width side wall.

3. The battery pack according to claim 1 , characterized in that:
the first plastic material has insulation and corrosion resistance characteristics; and
the second plastic material has mechanical performance characteristics.

4. The battery pack according to claim 3 , characterized in that:
the first plastic material is Nylon 66, and the second plastic material is a polyphthalamide.

5. The battery pack according to claim 1 , characterized in that
the first and the second metal wiring terminals are connected to positive output ends and negative output ends of the multiple serially-connected battery cells, respectively.

6. The battery pack according to claim 5 , characterized by further comprising
the second end of the first metal sheet and the second end of the second metal sheet are disposed inside the four side walls of the housing.

7. The battery pack according to claim 1 , wherein:
before the housing is molded, the first metal sheet and the second metal sheet are prefabricated;
before the housing is molded, the first metal sheet and the second metal sheet are insert- molded in the first plastic substrate and the second plastic substrate made of the first plastic material; and
when the housing is molded by using the second plastic material, the first plastic substrate and the second plastic substrate are insert-molded at the first step and the second step on the housing respectively.

8. The battery pack according to claim 7 , characterized in that:
the first end of the first metal sheet and the first end of the second metal sheet are disposed outside the four side walls of the housing.

9. The battery pack according to claim 1 , characterized in that:
the first step and the second step are configured in positions close to the upper portion opening on the first length side wall.

Assignees

• Cps Tech Holdings Llc

Inventors

• Liu Chang
• Fu Yingyao
• Cheng Liang
• Fan Binbin
• Zhang Tao

Classifications

• H01M50/553

  Terminals adapted for prismatic, pouch or rectangular cells · CPC title

• H01M50/55

  on the same side of the cell · CPC title

• H01M10/647

  Prismatic or flat cells, e.g. pouch cells · CPC title

• H01M10/6563

  with forced flow, e.g. by blowers · CPC title

• H01M50/296

  characterised by terminals of battery packs (terminals of batteries H01M50/543) · CPC title