Electric vehicle battery cell

Patent metadata

Field	Value
Publication number	US-10910608-B2
Application number	US-201815974091-A
Country	US
Kind code	B2
Filing date	May 8, 2018
Priority date	Mar 23, 2018
Publication date	Feb 2, 2021
Grant date	Feb 2, 2021

Abstract

Provided herein are a battery cell of a battery pack for electric vehicles. A housing for the battery cell can have a body and a head region. The body region can include an electrolyte, anode, and cathode. The battery cell can include a first sealing element disposed in an opening of the head region. The first sealing element can define two slots for disposing a second sealing element and a third sealing element respectively. A first conductive contact for a positive terminal coupled to the cathode can be disposed in the second sealing element. A second conductive contact for a negative terminal coupled to the anode can be disposed in the third sealing element. A first protector element disposed below the second sealing element can react to a first failure condition. A second protector element disposed below the third sealing element can react to a second failure condition.

First claim

What is claimed is:

1. A battery cell for electric vehicles, the battery cell comprising:
a cylindrical housing, the cylindrical housing having a body region and a head region, the body region including an electrolyte, a first electrode, and a second electrode, the head region defining an opening at a lateral end of the cylindrical housing;
a first sealing element disposed in the opening defined by the head region, the first sealing element comprised of an electrically insulative material, the first sealing element defining a first slot and a second slot;
a second sealing element disposed in the first slot defined by the first sealing element, the second sealing element defining a first opening for a first polarity terminal;
a third sealing element disposed in the second slot defined by the first sealing element, the third sealing element defining a second opening for a second polarity terminal;
a first conductive contact disposed in the first opening defined by the second sealing element, the first conductive element including the first polarity terminal to electrically couple with a first bonding element connected to the first electrode;
a second conductive contact disposed in the second opening defined by the third sealing element, the second conductive element including the second polarity terminal to electrically coupled with a second bonding element connected to the second electrode, the second conductive contact electrically isolated from the first conductive contact via the first sealing element, the second sealing element, and the third sealing element;
a first protector element disposed between the second sealing element and the first electrode to react during a first failure condition that occurs within the body region; and
a second protector element disposed between the third sealing element and the second electrode to react during a second failure condition that occurs within the body region, the second failure condition different from the first failure condition.

2. The battery cell of claim 1 , comprising:
the first sealing element having a divider element to separate a first portion of the first sealing element defining the first slot from a second portion of the first sealing element defining the second slot.

3. The battery cell of claim 2 , comprising:
the first portion of the first sealing element comprised of the electrically insulative material;
the second portion of the first sealing element comprised of the electrically insulative material; and
the divider element disposed in the first sealing element comprised of a metallic material, the metallic material surrounded by the electrically insulative material of the first portion and the second portion of the first sealing element.

4. The battery cell of claim 1 , comprising:
the first protector element including a first mechanism type to react in response to the first failure condition within the body region; and
the second protector element including a second mechanism type to react in response to the second failure condition within the body region, the second mechanism type different from the first mechanism type.

5. The battery cell of claim 1 , comprising:
the first protector element including a current interrupt device (CID) to react during the first failure condition by electrically decoupling the first conductive contact to the first electrode, the current interrupt device initially electrically coupling the first bonding element to the first conductive contact; and
the second protector element including a rupture disk to react during the second failure condition by fracturing to vent pressure arising from the body region of the cylindrical housing.

6. The battery cell of claim 1 , comprising:
the first conductive contact having a first protrusion element for the first polarity terminal, the first protrusion element protruding from a lateral end of the second sealing element through the opening at the lateral end of the cylindrical housing; and
the second conductive contact having a second protrusion element for the second polarity terminal, the second protrusion element protruding from a lateral end of the third sealing element through the opening at the lateral end of the cylindrical housing.

7. The battery cell of claim 6 , comprising:
the first protrusion element of the first conductive contact having a cylindrical shape and having a height of 0.5 to 1.5 mm and a diameter of 6 mm to 15 mm; and
the second protrusion element of the second conductive contact having a cylindrical shape and having a height of 0.5 to 1.5 mm and a diameter of 6 to 15 mm.

8. The battery cell of claim 1 , comprising:
the cylindrical housing having a neck region between the head region and the body region, the neck region defining an indentation between the head region and the body region, a width of the neck region less than a width of the head region and a width of the body region.

9. The battery cell of claim 1 , comprising:
the first sealing element forming a mechanical seal across the opening defined by the head region of the cylindrical housing to retain the electrolyte, the first electrode, the second electrode, the first conductive contact, the second conductive contact, the first protector element, and the second protector element disposed in the cylindrical housing.

10. The battery cell of claim 1 , comprising:
the second sealing element mechanically sealing the first slot defined by the first sealing element to retain the first conductive contact and the first protector element; and
the third sealing element mechanically sealing the second slot defined by the first sealing element to retain the second conductive contact and the second protector element.

11. The battery cell of claim 1 , comprising:
the first polarity terminal of the second conductive contact corresponding to a positive terminal, the first bonding element to electrically couple the positive terminal with the first electrode corresponding to an anode; and
the second polarity terminal of the second conductive contact corresponding to a negative terminal, the second bonding element to electrically couple the negative terminal with the second electrode corresponding to a cathode.

12. The battery cell of claim 1 , comprising:
the first conductive contact providing a first area for the first polarity terminal to bond with a third bonding element; and
the second conductive contact providing a second area for the second polarity terminal to bond with a fourth bonding element.

13. The battery cell of claim 1 , comprising:
the cylindrical housing having a height between 65 mm to 75 mm and a diameter of 16 mm to 26 mm.

14. The battery cell of claim 1 , comprising:
the housing comprised of an electrically insulative and thermally conductive material to thermally couple to a thermoelectric heat pump.

15. A method of providing battery cells for battery packs of electric vehicles, comprising:
providing a cylindrical housing for a battery cell of a battery pack having a plurality of battery cells, the cylindrical housing having a body region and a head region, the head region defining an opening at a lateral end of the cylindrical housing;
housing, within the body region, an electrolyte, a first electrode, and a second electrode;
disposing, in the opening defined by the head region, a first sealing element defining a first slot and a second slot, the first sealing element comprised of an electrically insulative material;
arranging, in the first slot defined by the first sealing element, a second sealing element defining a first opening for a first pola

Assignees

• Sf Motors Inc
• Chongqing Jinkang New Energy Vehicle Co Ltd

Inventors

• Monismith Scott Quinlan Freeman
• Campbell Brennan
• Liu Ying
• Tang Yifan

Classifications

• H01M50/289

  characterised by spacing elements or positioning means within frames, racks or packs (spacing elements inside cells other than separators, membranes or diaphragms H01M50/471) · CPC title

• H01M50/244

  Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method · CPC title

• H01M50/583

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

• H01M50/505

  comprising a single busbar · CPC title

• B60L50/64

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