Battery pack

Patent metadata

Field	Value
Publication number	US-11177525-B2
Application number	US-201716348447-A
Country	US
Kind code	B2
Filing date	Nov 9, 2017
Priority date	Nov 9, 2016
Publication date	Nov 16, 2021
Grant date	Nov 16, 2021

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 for a hybrid vehicle, wherein multiple battery cells are mounted in the battery pack, each of the multiple battery cells has a top portion and a bottom portion, and the top portion of each of the multiple battery cells is provided with a battery cell anode and a battery cell cathode, characterized in that the battery pack comprises:
a housing, wherein the housing has a bottom portion; the housing further has a first length side wall and a second length side wall that extend upward along a length direction of the bottom portion and that 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; and the bottom portion, the first length side wall, the second length side wall, the first width side wall, and the second width side wall form the housing closed by the bottom portion and the four side walls, and form an upper portion opening;
multiple oppositely disposed guide ribs 412 , which are disposed on inner sides of the first and the second length side walls to form multiple cellular slots for mounting the multiple battery cells;
a first end plate and a second end plate, wherein when the multiple battery cells are sequentially arranged and mounted in the multiple cellular slots, 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 sequentially arranged multiple battery cells;
a bearing plate, wherein the bearing plate is mounted above the top portions of the multiple battery cells; and
an upper cover, wherein the upper cover is mounted above the housing to cover the upper portion opening of the housing;
a middle recessed portion is formed between the protruding 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 is provided with at least one seal-breakable opening, and 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 multiple middle recessed portions at the multiple top portions of the multiple battery cells form a battery top portion through-slot; and
a bottom portion of the bearing plate is provided with an bearing plate bottom portion through-slot, a distal end of the bearing plate bottom portion through-slot is provided with a blocking plate, 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 the blocking plate;
the housing has a vertical gas discharging passage, and the vertical gas discharging passage is disposed on an inner side of the first width side wall;
the first width side wall is provided with a gas discharging port; and
the vertical gas discharging passage is in fluid communication with the lateral gas discharging passage;
an upper end of the first end plate is provided with a ventilation guide slot, and the ventilation guide slot is located between the lateral gas discharging passage and the vertical gas discharging 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 , wherein the bearing plate fixes the sequentially arranged and mounted multiple battery cells in a perpendicular direction of the housing.

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 , characterized by 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 are protrudingly disposed at 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 battery cell anodes and/or battery cell 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 , characterized by 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 the first length side wall; 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 the upper portion opening on the first length side wall.

10. The battery pack according to claim 8 , wherein at respective junctions of the two end portions of the first length side wall with the first width side wall and the second width side wall, the first length side wall is bent at the two end portions thereof towards the second length side wall, and the two 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 end portion of the first length side wall with the first width side wall and the second width side wall.

11. The battery pack according to claim 8 , wherein:
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 o

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

• H01M50/583

  in response to current, e.g. fuses · CPC title

• H01M50/553

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

• H01M50/55

  on the same side of the cell · CPC title

• H01M50/242

  adapted for protecting batteries against vibrations, collision impact or swelling · CPC title