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WO2021181199A1 - Battery assembly - Google Patents

Battery assembly Download PDF

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Publication number
WO2021181199A1
WO2021181199A1 PCT/IB2021/051715 IB2021051715W WO2021181199A1 WO 2021181199 A1 WO2021181199 A1 WO 2021181199A1 IB 2021051715 W IB2021051715 W IB 2021051715W WO 2021181199 A1 WO2021181199 A1 WO 2021181199A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery
cells
cell
battery assembly
assembly
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/IB2021/051715
Other languages
French (fr)
Inventor
Andries Petrus Cronje Fourie
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Poynting Antennas Pty Ltd
Original Assignee
Poynting Antennas Pty Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Poynting Antennas Pty Ltd filed Critical Poynting Antennas Pty Ltd
Publication of WO2021181199A1 publication Critical patent/WO2021181199A1/en
Priority to ZA2022/09836A priority Critical patent/ZA202209836B/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
    • H01M50/24—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries from their environment, e.g. from corrosion
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • This invention relates to energy storage assemblies and more particularly a rechargeable battery assembly and a method of protecting a battery assembly and/or components thereof.
  • a battery assembly comprising: - a shell made of a first material and defining a chamber;
  • the plurality of battery cells may comprise at least a first and a second battery cell, each comprising respective cell poles, and the at least first and second battery cells may electrically be interconnected with one another by electrical conductors extending between the respective cell poles of the at least first and second battery cells.
  • the battery assembly may comprise an electronic battery management system which is electrically connected to the cells and located in the shell.
  • the battery management system may provide battery assembly poles which are provided on an exterior wall of the shell.
  • the cells may be lead acid cells, alternatively the cells may be lithium iron phosphate (LiFeYPC ) cells.
  • LiFeYPC lithium iron phosphate
  • the first material may be a suitable metal, such as steel.
  • the solid cell protecting medium may fill the entire space between at least some of the cells.
  • the cells may be embedded in the solid cell protecting medium.
  • the cells and the battery management system may be embedded in the solid cell protecting medium.
  • the solid cell protecting medium may be thermally conductive.
  • the solid cell protecting medium may be electrically insulating.
  • the second material may have a flowable or malleable phase and a cured solid phase.
  • the second material may comprise a binder.
  • the second material may comprise a cementitious material.
  • the solid cell protecting medium may comprise reinforcement and may be reinforced concrete.
  • the battery assembly may comprise at least one anchor secured to the solid cell protecting medium and which at least one anchor may extend through the shell to beyond the shell.
  • the at least one anchor may be used to anchor the assembly to a base.
  • a method of protecting a plurality of spaced discrete battery cells which are housed in a chamber of a shell comprising the steps of: - introducing a flowable or malleable material into the chamber to fill at least part of a space between at least some cells; and - allowing the material to cure to form a solid cell protecting medium at least partially filling the space between at least some of the cells.
  • the invention also extends to a battery unit comprising:
  • a battery unit housing which is made of a housing material and at least one battery cell
  • the battery unit housing may be a battery cell housing and the armouring body may abut the battery cell housing.
  • the housing material may comprise at least one of aluminium and a polymeric material and the second material may comprise a cementitious material as defined above.
  • the at least one battery cell may be a lithium iron phosphate (LiFeYPC ) cell.
  • the second material may comprise a cementitious material and optionally a binder.
  • the battery unit housing may be a shell of a battery assembly comprising a plurality of interconnected battery cells located in a chamber defined by the shell.
  • figure 1 is a diagrammatic perspective view of a first example embodiment of a battery assembly
  • figure 2 is a section on line II in figure 1
  • figure 3 is a diagrammatic perspective view of a second example embodiment of a battery assembly
  • figure 4 is a section on line IV in figure 3.
  • a first example embodiment of a battery assembly is generally designated by the reference numeral 10 in figures 1 and 2.
  • the battery assembly 10 comprises a shell 12 made of a first material and defining a chamber 14.
  • a plurality of discrete battery cells 16.1 to 16.n are housed in the chamber 14 and are electrically interconnected with one another. At least some of the cells being spaced from one another.
  • the cells are lithium iron phosphate (LiFeYPC ) cells and have respective positive and negative cell poles 19.1 and 19.2 at a top end 21 of a body 23 of the cell.
  • the positive pole of a cell is connected by an external conductor 25 to the negative pole of an adjacent cell, so that the cells are electrically connected in series.
  • the battery assembly 10 comprises an electronic battery management system 22 located in the chamber.
  • the battery management system 22 is electrically connected by cables 24 to the poles of the cells in known manner.
  • the battery management system 22 provides battery assembly poles 26 and 28 which are provided on an exterior surface 30 of a wall 32 of the shell 12.
  • the shell is made of any suitable first material, such as steel.
  • the solid cell protecting medium 18 preferably fills the entire space between at least some, preferably all of the cells.
  • the medium 18 may be thermally conductive and electrically insolating.
  • the second material has a flowable or malleable phase, a cured solid phase and may comprise a binder.
  • the second material comprises a cementitious material.
  • the cementitious material may be reinforced.
  • the second material may be reinforced concrete.
  • the battery assembly 10 may comprise anchoring means comprising at least one anchor which is secured to the solid cell protecting medium 18 and which anchor extends through the shell 12 to beyond the shell.
  • the anchoring means may be used to anchor the assembly to a base (not shown).
  • the invention also extends to a method of protecting a plurality of spaced discrete battery cells 16.1 to 16.n which are housed in a chamber 14 of a shell 12. The method comprises introducing a flowable or malleable material into the chamber 14 to fill at least part of a space 20 between at least some cells 16.1 to 16.n and allowing the material to cure, to form a solid cell protecting medium 18 at least partially filling the space between at least some of the cells.
  • the solid cell protecting medium may adhere to the bodies 23 of the discrete battery cells 16.1 to 16. n.
  • the solid cell protecting medium 18 may upon hardening unite the structural integrity of at least some of the discrete battery cells with the structural integrity of the hardened solid cell protecting medium, such that removal of or tampering with (such as grinding away) the hardened solid cell protecting medium will destruct or damage at least some of the plurality of discrete battery cells, thereby serving as a deterrent for prospective thieves to vandalise the assembly

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Battery Mounting, Suspending (AREA)
  • Secondary Cells (AREA)

Abstract

A battery assembly (10) comprises a shell (12) made of a first material and which shell defines a chamber (14). A plurality of discrete battery cells (16.1 to 16.n) are housed in the chamber and are electrically interconnected with one another. At least some of the battery cells are spaced from one another. A solid cell protecting medium (18) of a second material, which is different from the first material, at least partially fills a space (20) between the at least some of the battery cells.

Description

BATTERY ASSEMBLY
INTRODUCTION AND BACKGROUND This invention relates to energy storage assemblies and more particularly a rechargeable battery assembly and a method of protecting a battery assembly and/or components thereof.
It is known to use rechargeable battery assemblies in association with solar panels for many applications. One such an application is to provide back-up power for a base station of a cellular network. Two of the most popular kinds of assemblies are lead acid assemblies and lithium iron phosphate (LiFeYP04) assemblies. In both cases, the assembly may comprise a cabinet or a shell, housing a plurality of cells. The cells are electrically connected to one another to provide a specified electrical capacity. A problem with the known assemblies is that they are popular targets for thieves who steal the entire assembly to be resold. Although some assemblies may comprise sophisticated electronic battery management systems functioning to protect the assembly from operating outside a designated geo-fenced area, thieves still vandalize the cabinet or shell to remove the cells for on-selling. OBJECT OF THE INVENTION
Accordingly, it is an object of the present invention to provide a battery assembly, battery unit and method with which the applicant believes the aforementioned disadvantages may at least be alleviated or which may provide a useful alternative for the known assemblies and methods.
SUMMARY OF THE INVENTION
According to the invention there is provided a battery assembly comprising: - a shell made of a first material and defining a chamber;
- a plurality of discrete battery cells which are housed in the chamber and electrically interconnected with one another, at least some of the cells being spaced from one another; and
- a solid cell protecting or armouring medium of a second material, which is different from the first material, at least partially filling a space between the at least some of the cells.
The plurality of battery cells may comprise at least a first and a second battery cell, each comprising respective cell poles, and the at least first and second battery cells may electrically be interconnected with one another by electrical conductors extending between the respective cell poles of the at least first and second battery cells. The battery assembly may comprise an electronic battery management system which is electrically connected to the cells and located in the shell. The battery management system may provide battery assembly poles which are provided on an exterior wall of the shell.
The cells may be lead acid cells, alternatively the cells may be lithium iron phosphate (LiFeYPC ) cells.
The first material may be a suitable metal, such as steel.
The solid cell protecting medium may fill the entire space between at least some of the cells.
The cells may be embedded in the solid cell protecting medium.
The cells and the battery management system may be embedded in the solid cell protecting medium.
The solid cell protecting medium may be thermally conductive.
The solid cell protecting medium may be electrically insulating. The second material may have a flowable or malleable phase and a cured solid phase.
The second material may comprise a binder.
The second material may comprise a cementitious material.
The solid cell protecting medium may comprise reinforcement and may be reinforced concrete.
The battery assembly may comprise at least one anchor secured to the solid cell protecting medium and which at least one anchor may extend through the shell to beyond the shell. The at least one anchor may be used to anchor the assembly to a base.
According to another aspect of the invention there is provided a method of protecting a plurality of spaced discrete battery cells which are housed in a chamber of a shell, the method comprising the steps of: - introducing a flowable or malleable material into the chamber to fill at least part of a space between at least some cells; and - allowing the material to cure to form a solid cell protecting medium at least partially filling the space between at least some of the cells. The invention also extends to a battery unit comprising:
- a battery unit housing which is made of a housing material and at least one battery cell; and
- a cast and then cured armouring body of a second material which is flowable upon casting and which armouring body abuts the battery unit housing.
The battery unit housing may be a battery cell housing and the armouring body may abut the battery cell housing. The housing material may comprise at least one of aluminium and a polymeric material and the second material may comprise a cementitious material as defined above.
The at least one battery cell may be a lithium iron phosphate (LiFeYPC ) cell.
The second material may comprise a cementitious material and optionally a binder. In other embodiments, the battery unit housing may be a shell of a battery assembly comprising a plurality of interconnected battery cells located in a chamber defined by the shell. Further according to the invention there is provided a method of protecting a battery unit comprising a battery unit housing and at least one battery cell, the method comprising:
- casting a flowable material to abut the battery unit housing; and
- allowing the flowable material to cure into a solid armouring body abutting the battery unit housing.
BRIEF DESCRIPTION OF THE ACCOMPANYING DIAGRAMS
The invention will now further be described, by way of example only, with reference to the accompanying diagrams wherein: figure 1 is a diagrammatic perspective view of a first example embodiment of a battery assembly; figure 2 is a section on line II in figure 1 ; figure 3 is a diagrammatic perspective view of a second example embodiment of a battery assembly; and figure 4 is a section on line IV in figure 3. DESCRIPTION OF A PREFERRED EMBODIMENT OF THE INVENTION
A first example embodiment of a battery assembly is generally designated by the reference numeral 10 in figures 1 and 2. The battery assembly 10 comprises a shell 12 made of a first material and defining a chamber 14. A plurality of discrete battery cells 16.1 to 16.n are housed in the chamber 14 and are electrically interconnected with one another. At least some of the cells being spaced from one another. A solid cell protecting or armouring medium 18 of a second material, which is different from the first material, fills at least part of a space 20 between at least some of the cells 16.1 and 16.2.
The cells are lithium iron phosphate (LiFeYPC ) cells and have respective positive and negative cell poles 19.1 and 19.2 at a top end 21 of a body 23 of the cell. In some embodiments, the positive pole of a cell is connected by an external conductor 25 to the negative pole of an adjacent cell, so that the cells are electrically connected in series.
The battery assembly 10 comprises an electronic battery management system 22 located in the chamber. The battery management system 22 is electrically connected by cables 24 to the poles of the cells in known manner. The battery management system 22 provides battery assembly poles 26 and 28 which are provided on an exterior surface 30 of a wall 32 of the shell 12.
The shell is made of any suitable first material, such as steel.
As shown in figures 1 and 2, the solid cell protecting medium 18 preferably fills the entire space between at least some, preferably all of the cells.
The medium 18 may be thermally conductive and electrically insolating.
The second material has a flowable or malleable phase, a cured solid phase and may comprise a binder.
In some embodiments the second material comprises a cementitious material. The cementitious material may be reinforced. In some example embodiments, the second material may be reinforced concrete.
The battery assembly 10 may comprise anchoring means comprising at least one anchor which is secured to the solid cell protecting medium 18 and which anchor extends through the shell 12 to beyond the shell. The anchoring means may be used to anchor the assembly to a base (not shown). The invention also extends to a method of protecting a plurality of spaced discrete battery cells 16.1 to 16.n which are housed in a chamber 14 of a shell 12. The method comprises introducing a flowable or malleable material into the chamber 14 to fill at least part of a space 20 between at least some cells 16.1 to 16.n and allowing the material to cure, to form a solid cell protecting medium 18 at least partially filling the space between at least some of the cells.
The solid cell protecting medium may adhere to the bodies 23 of the discrete battery cells 16.1 to 16. n. The solid cell protecting medium 18 may upon hardening unite the structural integrity of at least some of the discrete battery cells with the structural integrity of the hardened solid cell protecting medium, such that removal of or tampering with (such as grinding away) the hardened solid cell protecting medium will destruct or damage at least some of the plurality of discrete battery cells, thereby serving as a deterrent for prospective thieves to vandalise the assembly
10.
It will be appreciated that there are many variations in detail on the battery assembly and method without departing from the scope and spirit of the appended claims. For example, in figures 3 and 4 there is shown an assembly wherein the plurality of cells 16.1 to 16.n and the battery management system 22 are fully embedded in the solid medium 18.

Claims

1. A battery assembly comprising:
- a shell made of a first material and defining a chamber; - a plurality of discrete battery cells which are housed in the chamber and electrically interconnected with one another, at least some of the battery cells being spaced from one another; and
- a solid cell protecting medium of a second material, which is different from the first material, at least partially filling a space between the at least some of the battery cells.
2. The battery assembly as claimed in claim 1 wherein the plurality of battery cells comprise at least a first and a second battery cell, each comprising respective cell poles, and wherein the at least first and second battery cells are electrically interconnected with one another by electrical conductors extending between the respective cell poles of the at least first and second battery cells.
3. The battery assembly as claimed in claim 1 or claim 2 comprising an electronic battery management system which is electrically connected to the cells and located in the shell.
4. The battery assembly as claimed in claim 3 wherein the electronic battery management system provides battery assembly poles on an exterior wall of the shell which are electrically connected to the electrically interconnected battery cells.
5. The battery assembly as claimed in any one of the preceding claims wherein the cells comprise any one of: lead acid cells, and lithium iron phosphate (LiFeYPC ) cells.
6. The battery assembly as claimed in any one of the preceding claims wherein the first material is steel.
7. The battery assembly as claimed in any one of the preceding claims wherein the solid cell protecting medium fills the entire space between at least some of the cells.
8. The battery assembly as claimed in any one of the preceding claims wherein the plurality of cells are embedded in the solid cell protecting medium.
9. The battery assembly as claimed in any one of claims 3 to 8 wherein the battery management system is embedded in the solid cell protecting medium.
10. The battery assembly as claimed in any one of the preceding claims wherein the solid cell protecting medium is thermally conductive.
11. The battery assembly as claimed in any one of the preceding claims wherein the solid cell protecting medium is electrically insulating.
12. The battery assembly as claimed in any one of the preceding claims wherein the second material has a flowable phase and a cured solid phase.
13. The battery assembly as claimed in any one of the preceding claims wherein the second material comprises a cementitious material and optionally a binder.
14. The battery assembly as claimed in any one of the preceding claims wherein the solid cell protecting medium comprises reinforcement.
15. The battery assembly as claimed in claim 14 wherein the solid cell protecting medium comprises reinforced concrete.
16. The battery assembly as claimed in any one of the preceding claims wherein the battery assembly comprises at least one anchor secured to the solid cell protecting medium and extending through the shell to beyond the shell.
17. A method of protecting a plurality of spaced discrete battery cells which are housed in a chamber of a shell, the method comprising:
- introducing a flowable material into the chamber to fill at least part of a space between at least some of the battery cells; and
- allowing the flowable material to cure to form a solid cell protecting medium at least partially filling the space between at least some of the battery cells.
18. A battery unit comprising:
- a battery unit housing which is made of a housing material and comprising at least one battery cell; - a cast and then cured armouring body of a second material which is flowable upon casting and which armouring body abuts the battery assembly housing.
19. The battery unit as claimed in claim 18 wherein the armouring body abuts and adheres to the battery unit housing.
20. The battery unit as claimed in any one of claims 18 and 19 wherein the battery unit housing is a battery cell housing and wherein the armouring body abuts and adheres to the battery cell housing.
21. The battery unit as claimed in any one of claims 18 to 20 wherein the battery cell is a lithium iron phosphate (LiFeYPC ) cell and wherein the housing material comprises at least one of aluminium and a polymeric material.
22. The battery unit as claimed in any one of claims 18 to 21 wherein the second material comprises a cementitious material and optionally a binder.
23. A method of protecting a battery unit comprising a battery unit housing and at least one battery cell, the method comprising:
- casting a flowable material to abut the battery unit housing; and
- allowing the flowable material to cure into a solid armouring body abutting the battery unit housing.
PCT/IB2021/051715 2020-03-10 2021-03-02 Battery assembly Ceased WO2021181199A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
ZA2022/09836A ZA202209836B (en) 2020-03-10 2022-09-02 Battery assembly

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA2020/01492 2020-03-10
ZA202001492 2020-03-10

Publications (1)

Publication Number Publication Date
WO2021181199A1 true WO2021181199A1 (en) 2021-09-16

Family

ID=74860347

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2021/051715 Ceased WO2021181199A1 (en) 2020-03-10 2021-03-02 Battery assembly

Country Status (2)

Country Link
WO (1) WO2021181199A1 (en)
ZA (1) ZA202209836B (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2290731A1 (en) * 2009-08-26 2011-03-02 Sanyo Electric Co., Ltd. Battery pack
US20150171387A1 (en) * 2013-12-12 2015-06-18 General Electric Company Battery pack and associated methods
US20180223070A1 (en) * 2017-02-08 2018-08-09 Elkem Silicones USA Corp. Secondary battery pack with improved thermal management

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2290731A1 (en) * 2009-08-26 2011-03-02 Sanyo Electric Co., Ltd. Battery pack
US20150171387A1 (en) * 2013-12-12 2015-06-18 General Electric Company Battery pack and associated methods
US20180223070A1 (en) * 2017-02-08 2018-08-09 Elkem Silicones USA Corp. Secondary battery pack with improved thermal management

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ARORA SHASHANK ET AL: "Review of mechanical design and strategic placement technique of a robust battery pack for electric vehicles", RENEWABLE AND SUSTAINABLE ENERGY REVIEWS, ELSEVIERS SCIENCE, NEW YORK, NY, US, vol. 60, 18 March 2016 (2016-03-18), pages 1319 - 1331, XP029505300, ISSN: 1364-0321, DOI: 10.1016/J.RSER.2016.03.013 *

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