One-way valve, top cover component, box and battery module

Patent metadata

Field	Value
Publication number	US-10833304-B2
Application number	US-201816115142-A
Country	US
Kind code	B2
Filing date	Aug 28, 2018
Priority date	Feb 8, 2018
Publication date	Nov 10, 2020
Grant date	Nov 10, 2020

Abstract

The disclosure relates to a one-way valve, a top cover component, a box and a battery module. The one-way valve includes: a valve body including an inlet end, an exhaust end and an air-flow passage, the air-flow passage including a first flow-passing hole, a second flow-passing hole and a protrusion disposed on a bottom wall of the first flow-passing hole, the second flow-passing hole penetrating through the protrusion; an elastic valve cap, the protrusion being sheathed with and in a sealed connection with the elastic valve cap, a flow-passing gap is formed between an outer surface of the elastic valve cap and a hole wall of the first flow-passing hole, the second flow-passing hole includes a conical hole-section; a valve cover in connection with the exhaust end, wherein the valve cover is disposed within the first flow-passing hole and includes an exhaust passage in connection with the first flow-passing hole.

First claim

What is claimed is:

1. A one-way valve for use in a battery module, comprising:
a valve body comprising an inlet end and an exhaust end opposite to each other in an axial direction of the valve body and an airflow passage penetrating through the inlet end and the exhaust end, wherein the valve body is a columnar structure, the airflow passage comprises a first flow-passing hole and a second flow-passing hole distributed from the exhaust end to the inlet end, and the valve body further comprises a protrusion disposed on a bottom wall of the first flow-passing hole and extending towards the exhaust end, the second flow-passing hole penetrating through the protrusion;
an elastic valve cap comprising a receiving concavity, the receiving concavity being a circular blind hole having a bottom wall and an inner sidewall extending substantially vertically from the bottom wall, wherein the inner sidewall of the receiving concavity is fitted with an outer surface of the protrusion so that the elastic valve cap is in a sealed connection with the protrusion, a flow-passing gap is formed between an outer sidewall of the elastic valve cap and a hole wall of the first flow-passing hole, a top end surface of the protrusion is in contact with the bottom wall of the receiving concavity, and the second flow-passing hole comprises a conical hole-section disposed on the top end surface, the conical hole-section diminishing gradually from the top end surface towards the inlet end;
a valve cover in connection with the exhaust end, wherein the valve cover is disposed within the first flow-passing hole and is pressed against the elastic valve cap and comprises an exhaust passage in connection with the first flow-passing hole,
wherein the valve body comprises a first positioning portion disposed on the first flow-passing hole and an end surface facing towards the elastic valve cap of the valve cover is in contact with the first positioning portion.

2. The one-way valve of claim 1 , wherein a cone angle of the conical hole-section is larger than 0° and less than 180°.

3. The one-way valve of claim 1 , further comprising a mounting flange disposed on an outer peripheral surface of the exhaust end.

4. The one-way valve of claim 1 , wherein an outer end surface of the valve cover is leveled with an end surface of the exhaust end and the exhaust passage is an exhaust hole or an exhaust slot.

5. The one-way valve of claim 1 , further comprising a filter component disposed within the second flow-passing hole and in an interference fit with the second flow-passing hole.

6. The one-way valve of claim 5 , wherein the valve body comprises a second positioning portion disposed on the second flow-passing hole, the filter component facing towards an end surface of the exhaust end and in contact with the second positioning portion.

7. A top cover component for use in a single battery, comprising:
a top cover plate and an electrode terminal disposed on the top cover plate, wherein
the top cover plate comprises a top end and a bottom end opposite to each other in a thickness direction of the top cover plate, the one-way valve of claim 1 is disposed on the top cover plate, the one-way valve and the electrode terminal are disposed apart in a length direction of the top cover plate, the exhaust end of the one-way valve is in connection with the top end, and the inlet end of the one-way valve is located near the bottom end.

8. A box for use in a battery module, comprising:
a baseplate and side plates in connection with the baseplate, wherein the baseplate and the side plates form a receiving part for receiving a single battery;
the one-way valve of claim 1 , wherein the one-way valve is in connection with the baseplate or the side plates via the exhaust end and the inlet end is located within the receiving part.

9. A battery module, comprising:
a box and a plurality of batteries disposed within the box, each of the plurality of batteries comprising a top cover plate, wherein
the one-way valve of claim 1 is disposed on the box and/or the top cover plate.

Assignees

• Contemporary Amperex Technology Co Ltd

Inventors

• You Zhiyi
• Wang Xiaofan
• Qin Feng
• Ma Lin
• Wang Zhi
• Xiao Xinfu

Classifications

• H01M50/204

  Racks, modules or packs for multiple batteries or multiple cells · CPC title

• H01M50/147

  Lids or covers · CPC title

• H01M50/342

  Non-re-sealable arrangements · CPC title

• H01M50/325 Primary

  comprising deformable valve members, e.g. elastic or flexible valve members · CPC title

• H01M50/383

  Flame arresting or ignition-preventing means · CPC title