Battery packs to power electric vehicles

Patent metadata

Field	Value
Publication number	US-10938003-B2
Application number	US-201816118285-A
Country	US
Kind code	B2
Filing date	Aug 30, 2018
Priority date	Sep 12, 2017
Publication date	Mar 2, 2021
Grant date	Mar 2, 2021

Abstract

Systems and methods to power electric vehicles are disclosed. A battery pack to power an electric vehicle is provided. The battery pack residing in the electric vehicle. The battery pack can include a plurality of battery modules. Each of the plurality of battery modules can include a plurality of battery blocks. A first battery block can include a plurality of cylindrical battery cells. Each of the plurality of cylindrical battery cells can have a pair of battery cell terminals and can have a voltage of up to 5 volts across the pair of battery cell terminals. The plurality of cylindrical battery cells can be electrically connected in parallel within the first battery block. Each cylindrical battery cell of the plurality of cylindrical battery cells can be spatially separated from each of at least one adjacent cylindrical battery cell within the first battery block by less than 2 millimeter (mm).

First claim

What is claimed is:

1. A system to power electric vehicles, comprising:
a battery pack to power an electric vehicle, the battery pack residing in the electric vehicle and comprising a plurality of battery modules;
each of the plurality of battery modules comprising a plurality of battery blocks;
a first battery block of the plurality of battery blocks having a pair of battery block terminals, the first battery block comprising a plurality of cylindrical battery cells;
each of the plurality of cylindrical battery cells of the first battery block having a pair of battery cell terminals, each of the plurality of cylindrical battery cells of the first battery block having a voltage of up to 5 volts across each respective pair of battery cell terminals, the plurality of cylindrical battery cells electrically connected in parallel within the first battery block, each cylindrical battery cell of the plurality of cylindrical battery cells spatially separated from each of at least one adjacent cylindrical battery cell within the first battery block by less than 2 millimeter (mm), the plurality of cylindrical battery cells provides a battery block capacity to store energy that is at least five times greater than a battery cell capacity of each of the plurality of cylindrical battery cells, and the first battery block having a voltage of up to 5 volts across the pair of battery block terminals of the first battery block;
each of the plurality of battery modules having a battery module capacity that is greater than the battery block capacity, and each of the plurality of battery modules having a battery module voltage greater than the voltage across the pair of battery block terminals of the first battery block; and
the pair of battery cell terminals of each of the plurality of cylindrical battery cells including a positive terminal and a negative terminal extending from a common end of the respective cylindrical battery cell, the positive terminal connected to a first layer of a cell holder of the first battery block and the negative terminal connected to a second layer of the cell holder of the first battery block.

2. The system of claim 1 , comprising:
the cell holder of the first battery block including a non-conductive layer disposed between the first layer of the cell holder and the second layer of the cell holder.

3. The system of claim 1 , comprising:
a plurality of enclosures for the plurality of battery blocks, each of the plurality of enclosures to at least partially enclose the plurality of cylindrical battery cells, wherein each of the plurality of enclosures are up to 1 cubic foot in volume.

4. The system of claim 1 , comprising:
at least some of the plurality of battery modules and the plurality of battery blocks electrically connected in series.

5. The system of claim 1 , comprising:
at least some of the plurality of battery modules and the plurality of battery blocks electrically connected in parallel.

6. The system of claim 1 , wherein the battery block capacity corresponds to a total number of cylindrical battery cells in the first battery block.

7. The system of claim 1 , comprising:
an injection-molded cell holder to spatially maintain the cylindrical battery cells relative to each other.

8. The system of claim 1 , comprising:
an injection-molded cell holder to spatially maintain the cylindrical battery cells relative to each other to at least meet creepage-clearance requirements for the battery pack to provide a voltage of at least 400 volts.

9. The system of claim 1 , comprising:
an injection molded cell holder formed from a flame resistant plastic material.

10. The system of claim 1 , comprising:
an injection molded cell holder having a material that includes at least one of plastic, polycarbonate, Acrylonitrile Butadiene Styrene (ABS), Polyvinyl chloride (PVC), Polyphenylene sulfide (PPS), and Nylon with glass fill.

11. A method of providing an electric vehicle with a battery pack, comprising:
arranging a plurality of cylindrical battery cells within a battery block, each of the plurality of cylindrical battery cells having a pair of battery cell terminals and the battery block having a pair of battery block terminals;
spatially separating each cylindrical battery cell of the plurality of cylindrical battery cells from each of at least one adjacent cylindrical battery cell by a distance less than 2 millimeters (mm) or less within the battery blocks, each of the plurality of cylindrical battery cells having a voltage of up to 5 volts across each respective pair of battery cell terminals;
electrically connecting the plurality of cylindrical battery cells in parallel with one another to provide a battery block capacity for storing energy that is at least five times greater than a battery cell capacity of each of the plurality of cylindrical battery cells, and having a voltage of up to 5 volts across the pair of battery block terminals of the battery block;
disposing a plurality of the battery blocks within each of a plurality of battery modules, each of the plurality of battery modules having a battery module capacity that is greater than the battery block capacity, and each of the plurality of the battery modules having a battery module voltage that is greater than the voltage across the pair of battery block terminals of the battery block, the pair of battery cell terminals of each of the plurality of cylindrical battery cells including a positive terminal and a negative terminal extending from a common end of the respective cylindrical battery cell;
connecting the positive terminal of the pair of battery cell terminals of each of the plurality of cylindrical battery cells to a first layer of a cell holder of the first battery block;
connecting the negative terminal of the pair of battery cell terminals of each of the plurality of cylindrical battery cells to a second layer of the cell holder of the first battery block; and
forming a battery pack using the plurality of the battery modules, to reside in an electric vehicle and to power the electric vehicle.

12. The method of claim 11 , comprising:
at least partially enclosing the plurality of cylindrical battery cells in an enclosure of the battery block.

13. The method of claim 12 , comprising:
configuring the enclosure to be less than 1 cubic feet in volume.

14. The method of claim 11 , comprising:
electrically connecting at least some of the plurality of the battery block in series.

15. The method of claim 11 , comprising:
electrically connecting at least some of the plurality of the battery block in parallel.

16. The method of claim 11 , comprising:
configuring the battery block to provide a battery block capacity value that corresponds to a total capacity of the plurality of cylindrical battery cells in the battery block.

17. The method of claim 11 , comprising:
forming an injection-molded cell holder to spatially maintain the plurality of cylindrical battery cells relative to each other.

18. The method of claim 11 , comprising:
forming an injection-molded cell holder to spatially maintain the plurality of cylindrical battery cells relative to each other to at least meet creepage-clearance requirements for the battery pack to provide a voltage of at least 400 volts.

19. The method of claim 11 , comprising:
forming an injection molded cell holder using at least one of: a flame resistant plastic material, polycarbonate, Acrylonitrile Butadiene Styrene (ABS), Polyvinyl chloride (PVC), Polyphenylene sulfide (PPS), and Nylon with g

Assignees

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

Inventors

• Capati Nathalie
• Wang Duanyang
• Heth Jacob
• Chi Binbin

Classifications

• B60L50/64 Primary

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

• H01M50/516

  by welding, soldering or brazing · CPC title

• H01M50/249

  specially adapted for aircraft or vehicles, e.g. cars or trains (constructional details of batteries specially adapted for electric vehicles B60L50/64) · CPC title

• H01M50/293 Primary

  characterised by the material · CPC title

• H01M50/512

  Connection only in parallel · CPC title