Battery pack

Patent metadata

Field	Value
Publication number	US-11724606-B2
Application number	US-202117518179-A
Country	US
Kind code	B2
Filing date	Nov 3, 2021
Priority date	Nov 9, 2016
Publication date	Aug 15, 2023
Grant date	Aug 15, 2023

Abstract

The present disclosure provides a battery pack for a hybrid vehicle. The battery pack includes: multiple battery cells, a housing, a first end plate, a second end plate, a bearing plate and an upper cover, wherein the housing is provided with a bottom portion and side walls extending from the periphery of the bottom portion and forming an upper portion opening; the housing is configured for accommodating the multiple battery cells and the two end plates, when the multiple battery cells are sequentially arranged and mounted into the housing, the first end plate and the second end plate are located at two end sides of the sequentially arranged multiple battery cells to laterally fix the multiple battery cells; the bearing plate is mounted above the top portions of the multiple battery cells; and the upper cover is mounted above the housing to cover the upper portion opening of the housing.

First claim

We claim:

1. A battery pack comprising:
multiple battery cells, each of the multiple battery cells is provided with a battery cell anode and a battery cell cathode;
a housing having a first width side wall and a second width side wall, the housing further including a top, a bottom, and two opposing length side walls;
a first end plate and a second end plate, the first end plate positioned between the first width side wall and the multiple battery cells, and the second end plate positioned between the second width side wall and the multiple battery cells;
a middle recessed portion positioned on a top surface of each of the multiple battery cells, the middle recessed portion formed between the battery cell anode and the battery cell cathode disposed on the top portion of each of the multiple battery cells;
a surface of the middle recessed portion including at least one seal-breakable opening, the at least one seal-breakable opening is arranged to discharge a gas generated in the battery cell when broken;
when the multiple battery cells are continuously arranged and mounted in the housing, the middle recessed portions at the top portions of the multiple battery cells form a battery top portion through-slot; and
a bearing plate having a bottom portion provided with a bearing plate bottom portion through-slot, and when the bearing plate is mounted at the top portions of the multiple battery cells, the bearing plate bottom portion through-slot is press-fitted with the battery top portion through-slot to form a lateral gas discharging passage, wherein the lateral gas discharging passage has an outlet, and a distal end of the lateral gas discharging passage is sealed by a blocking plate;
a vertical gas discharging passage disposed on an inner side of the first width side wall, wherein the vertical gas discharging passage is in fluid communication with the lateral gas discharging passage; and
a ventilation guide slot positioned in an upper end of the first end plate, and the ventilation guide slot is located between the lateral gas discharging passage and the vertical gas discharging passage to enable the lateral gas discharging passage to be in fluid communication with the vertical gas discharging passage.

2. The battery pack according to claim 1 , further comprising a gas discharging port on the first width side wall to provide an outlet for the vertical gas discharging passage.

3. The battery pack according to claim 1 , wherein the bottom portion is provided with a heat dissipation apparatus, wherein the heat dissipation apparatus is provided with an air passage, and the air passage has an inlet and an outlet.

4. The battery pack according to claim 3 , wherein the heat dissipation apparatus is provided with a heat dissipation pad, and two sides of the heat dissipation pad are in contact with the bottom portions of the multiple battery cells and an upper portion of the air passage respectively.

5. The battery pack according to claim 1 , further comprising:
a circuit board, wherein a control circuit is mounted on the circuit board; and
a harness, wherein the harness is mounted on the bearing plate, and the harness comprises multiple connection wires to connect each of the multiple battery cells to the control circuit.

6. The battery pack according to claim 5 , wherein:
the battery cell anode and the battery cell cathode of each of the multiple battery cells protrude from the top portion of each battery cell;
the bearing plate is provided with multiple mounting windows; and
the battery pack further comprises:
multiple battery cell bus bars, wherein the multiple battery cell bus bars are mounted in multiple windows of the bearing plate to connect in series the anode and the cathode of each of the multiple battery cells, so as to form a positive output end and a negative output end of the battery cells connected in series;
multiple battery cell fasteners for connecting the multiple battery cell bus bars to the anodes and/or cathodes of the corresponding battery cells.

7. The battery pack according to claim 6 , wherein
one end of each of the multiple connection wires of the harness is mounted on a corresponding bus bar of the multiple bus bars, to connect to the battery cell anode and/or the battery cell cathode on a corresponding battery cell; and
the other end of each of the multiple connection wires of the harness is connected to the control circuit, so that each battery cell anode and each battery cell cathode of the multiple battery cells are connected to the control circuit to enable the control circuit to monitor a working state of each of the battery cells.

8. The battery pack according to claim 6 , further comprising:
a first metal wiring terminal and a second metal wiring terminal, wherein the first and the second metal wiring terminals are connected to the positive output end and the negative output end of the multiple battery cells connected in series, respectively;
a first step and a second step are disposed at two end portions of one of the length side walls; and
the first metal wiring terminal and the second metal wiring terminal are disposed on the first step and the second step, respectively.

9. The battery pack according to claim 8 , wherein the first step and the second step are disposed in positions close to an upper portion opening on the one of the length side walls.

10. The battery pack according to claim 8 , wherein at respective junctions of the two end portions of the one of the length side walls with the first width side wall and the second width side wall, the one of the length side walls is bent at the two end portions thereof towards the other length side wall, and the two end portions of the first width side wall and the second width side wall close to the one of the length side walls are bent towards each other respectively, so as to form the first step and the second step at the two junctions of the end portion of the one of the length side walls with the first width side wall and the second width side wall.

11. The battery pack according to claim 8 , herein:
a material for bearing the first metal wiring terminal and the second metal wiring terminal is a first plastic material; and
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.

12. The battery pack according to claim 11 , wherein:
the first plastic material and the second plastic material have different characteristics;
the first plastic material has desirable insulation and corrosion resistance; and
the second plastic material has desirable mechanical performance.

13. The battery pack according to claim 12 , wherein:
the first plastic material is polyphthalamide, and
the second plastic material is Nylon 66.

14. The battery pack according to claim 13 , further comprising:
a first metal sheet and a second metal sheet, wherein the first metal wiring terminal and the second metal wiring terminal are disposed at 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, wherein the first leading-out terminal and the second leading-out terminal are disposed at a second end of the first metal sheet and a second end of the second metal sheet respectively, so 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, wherein
the first leading-out terminal and the second leading-out terminal are connected to the posi

Assignees

• Cps Tech Holdings Llc
• Clarios Advanced Solutions Gmbh

Inventors

• Fan Binbin
• Cheng Liang
• Qu Wei
• Song Peng
• Fu Yingyao
• Liu Chang
• Fuhr Jason D
• Wiegmann Martin
• Zhang Xugang
• Czarnecki Jennifer L

Classifications

• B60L50/64 Primary

  Constructional details of batteries specially adapted for electric vehicles · CPC title

• B60L58/26

  by cooling · CPC title

• F04D25/0673

  Battery powered · CPC title

• F04D29/601

  specially adapted for elastic fluid pumps · CPC title

• H01M10/425

  Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing (printed circuits H05K1/00) · CPC title