WO2014203089A1 - Battery comprising a plurality of rechargeable cells arranged in a matrix - Google Patents

Battery comprising a plurality of rechargeable cells arranged in a matrix Download PDF

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Publication number
WO2014203089A1
WO2014203089A1 PCT/IB2014/060972 IB2014060972W WO2014203089A1 WO 2014203089 A1 WO2014203089 A1 WO 2014203089A1 IB 2014060972 W IB2014060972 W IB 2014060972W WO 2014203089 A1 WO2014203089 A1 WO 2014203089A1
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WO
WIPO (PCT)
Prior art keywords
board
terminals
cells
connection
battery
Prior art date
Application number
PCT/IB2014/060972
Other languages
French (fr)
Inventor
Antonio LÓPEZ ORTIZ
Original Assignee
Dachs Electrónica, S. A.
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 Dachs Electrónica, S. A. filed Critical Dachs Electrónica, S. A.
Publication of WO2014203089A1 publication Critical patent/WO2014203089A1/en

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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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/519—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising printed circuit boards [PCB]
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
    • H01M4/5825—Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
    • 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
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/213—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for cells having curved cross-section, e.g. round or elliptic
    • 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
    • H01M50/284—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with incorporated circuit boards, e.g. printed circuit boards [PCB]
    • 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
    • H01M50/298—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the wiring of battery packs
    • 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/503—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the shape of the interconnectors
    • 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/514—Methods for interconnecting adjacent batteries or cells
    • H01M50/516—Methods for interconnecting adjacent batteries or cells by welding, soldering or brazing
    • 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/521—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the material
    • H01M50/522—Inorganic material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
    • H05K2201/10007—Types of components
    • H05K2201/10037—Printed or non-printed battery
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
    • H05K2201/10227—Other objects, e.g. metallic pieces
    • H05K2201/1028—Thin metal strips as connectors or conductors
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
    • H05K2201/10227—Other objects, e.g. metallic pieces
    • H05K2201/10287—Metal wires as connectors or conductors
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
    • H05K2201/10431—Details of mounted components
    • H05K2201/10439—Position of a single component
    • H05K2201/10492—Electrically connected to another device
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
    • H05K3/32—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
    • H05K3/328—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by welding
    • 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

  • the present invention relates to a battery comprising a plurality of rechargeable cells arranged in a matrix with a high reliability and to a manufacturing method of such battery, which ensures a high reliability in the connections.
  • batteries comprising a plurality of rechargeable cells arranged in a matrix, comprising at least a connection board between terminals arranged in a face of the battery and provided with connection tracks, the terminals being connected by means of cables, wires o strips made of electrical conductive alloys and by means of welding to said connection tracks, the connection board being provided with openings for accessing said terminals through the connection board.
  • connection plate is described in one of the battery sides, which is arranged on a control PCB (printed circuit board).
  • cell balancing systems which operate based on signals from the current and voltage sensors, possibly of the temperature of each of the battery cells.
  • Power, monitoring and control connections of the cells and rebalancing are very numerous, and especially when it comes to high-voltage batteries which can include hundreds of cells, in which case it may be several thousand. If you also want to provide redundancy, the number of connections is doubled. And it is known that for the batteries to function optimally and to lengthen its life to the fullest, it is necessary for these connections to have a high quality and reliability.
  • the present invention aims to provide a solution to the aforementioned shortcomings of the prior art by means of a battery comprising a plurality of rechargeable cells arranged in a matrix, comprising at least a connection board between terminals arranged in a face of the battery and provided with connection tracks, the terminals being connected by means of cables, wires o strips made of electrical conductive alloys and by means of welding to said connection tracks, the connection board being provided with openings for accessing said terminals through the connection board, which is characterized in that:
  • the board is a printed circuit board
  • the tracks are on the surface of the board not oriented towards the cells;
  • wires o strips made of electrical conductive alloys connect the terminals to the connection tracks through said openings;
  • the welding is an ultrasound, laser or electric welding.
  • the present invention is based on the fusion of two technologies, which have so far been isolated. Specifically, the present invention is based on battery technology combined with the technology of welding of PCBs used in electronics. This allows many welds at high speed, in an orderly and fully reliable manner. As will be seen, it allows for connection of a very large number of cells, and especially it allows for including connections to sensors, and also to make redundant connections. This is not possible in U.S. 4920019 A, wherein the features of the characterizing part of the first appended claim are not described.
  • all the cells have the same orientation, both terminals of each cell being accessible by the same end of the cell, being provided the board of openings for accessing both terminals, such that the connections between both terminals of each cell and the connection tracks are only carried out on the surface of the board not oriented towards the cells.
  • the board(s) include(s) the control electronics for each cell. This feature is especially advantageous.
  • the inclusion of the control electronics for each cell in the prior art, is performed by dedicated especially plates, as described above.
  • the present invention allows for including in a single board both the power connections and the control connections.
  • control electronics comprises current, voltage and temperature sensors and a data processor with status indicator output to a connection bus.
  • wires o strips made of electrical conductive alloys are aluminium, copper or gold alloys.
  • the board(s) are multilayer.
  • the battery comprises two connection cables between each terminal and the corresponding track.
  • the invention could be applied to any type of cells, but finds an advantageous application in cylindrical cells.
  • the cells are LiFePo 4 cells.
  • the gaps between cells form cooling channels, the board(s) being provided with openings coincident with said channels.
  • the invention also relates to a battery manufacturing method starting from a plurality of rechargeable cells provided in at least one of their ends of terminals, which comprises the following steps:
  • connection between each terminal and the corresponding track is carried out by means of two cables.
  • the cables are aluminium, copper or gold alloys.
  • all the cells are arranged with the same orientation, leaving both terminals of each cell accessible by the same end of the cell, being provided the board of openings for accessing both terminals, such that the connections between both terminals of each cell and the connection tracks are only carried out on the surface of the board not oriented towards the cells.
  • the cells are arranged with opposed terminals, the cells being arranged with alternate terminals, and arranging in each side of the battery a connection board with the tracks in the surface of the board not oriented towards the cells.
  • the method can include a previous stage of integrating the control electronics of each cell in the plate or plates .
  • control electronics comprises current, voltage and temperature sensors and a data processor with status indicator output to a connection bus.
  • Figure 1 is a section view showing the basic components of the battery and especially the connections.
  • Figure 2 is a plan view.
  • the invention relates generally to a battery 1 comprising a plurality of rechargeable cells 2 arranged in a matrix, comprising at least a connection board 3 between terminals 4, 5 arranged in a face of the battery 1 and provided with connection tracks 6, the terminals 4, 5 being connected by means of cables, wires o strips made of electrical conductive alloys 7 and by means of welding to said connection tracks 6, the connection board 3 being provided with openings 8 for accessing said terminals 4, 5 through the connection board 3.
  • the board 3 is a printed circuit board
  • the tracks 6 are on the surface of the board 3 not oriented towards the cells 2;
  • wires o strips made of electrical conductive alloys 7 connect the terminals 4, 5 to the connection tracks 6 through said openings 5;
  • the welding is an ultrasound, laser or electric welding.
  • both terminals 4, 5 of each cell 2 being accessible by the same end of the cell 2, being provided the board 3 of openings 8 for accessing both terminals 4, 5, such that the connections between both terminals 4, 5 of each cell 2 and the connection tracks 6 are only carried out on the surface of the board 3 not oriented towards the cells 2.
  • the inventive battery can be obtained with the following method: arranging the cells 2 in a support such that they form a matrix;
  • connection tracks 6 connecting by means of cables, wires o strips of electrical conductive material 7 welded by ultrasounds the terminals 4, 5 and the connection tracks 6.
  • each terminal and the corresponding track is carried out by means of two o more cables.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Inorganic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

Battery (1) of rechargeable cells (2) arranged in a matrix, comprising a connection board (3) between terminals (4, 5) arranged in a face of the battery (1) and provided with connection tracks (6), the terminals (4, 5) being connected by means of cables (7) and by means of welding to said connection tracks (6), the connection board (3) being provided with openings (8) for accessing said terminals (4, 5) through the connection board (3), wherein the board (3) is a printed circuit board, the tracks (4) are on the surface of the board (3) not oriented towards the cells (2), the cables, wires o strips made of electrical conductive alloys (7) connect the terminals (4, 5) to the connection tracks (6) through said openings (5); and the welding is an ultrasound, laser or electric welding. It also relates to a manufacturing method of such battery.

Description

BATTERY COMPRISING A PLURALITY OF RECHARGEABLE CELLS ARRANGED IN A
MATRIX
The present invention relates to a battery comprising a plurality of rechargeable cells arranged in a matrix with a high reliability and to a manufacturing method of such battery, which ensures a high reliability in the connections.
Background of the invention
Known are in the art batteries comprising a plurality of rechargeable cells arranged in a matrix, comprising at least a connection board between terminals arranged in a face of the battery and provided with connection tracks, the terminals being connected by means of cables, wires o strips made of electrical conductive alloys and by means of welding to said connection tracks, the connection board being provided with openings for accessing said terminals through the connection board.
It is an example of such batteries that described in US2008152993. Specifically, this document describes the concept of a connection by one side by means of a plate.
In US201 10097618 a connection plate is described in one of the battery sides, which is arranged on a control PCB (printed circuit board).
In US20100136392A1 a battery control PCB that includes sensors, control devices and the battery connections for control is described.
US 4920019 A (Stoklosa DAVID P et al.), Considered as the closest prior art, describes all the features of the preamble of the first claim.
Furthermore, it is increasingly common to incorporate cell balancing systems into the battery, which operate based on signals from the current and voltage sensors, possibly of the temperature of each of the battery cells.
Power, monitoring and control connections of the cells and rebalancing are very numerous, and especially when it comes to high-voltage batteries which can include hundreds of cells, in which case it may be several thousand. If you also want to provide redundancy, the number of connections is doubled. And it is known that for the batteries to function optimally and to lengthen its life to the fullest, it is necessary for these connections to have a high quality and reliability.
With the state of the art solutions, these requirements pose several technical problems:
- It takes a lot of space to make connections;
- It takes a long time to provide for reliable connections;
- Any change is a complication, making it difficult to scale the connection methods; Description of the invention
The present invention aims to provide a solution to the aforementioned shortcomings of the prior art by means of a battery comprising a plurality of rechargeable cells arranged in a matrix, comprising at least a connection board between terminals arranged in a face of the battery and provided with connection tracks, the terminals being connected by means of cables, wires o strips made of electrical conductive alloys and by means of welding to said connection tracks, the connection board being provided with openings for accessing said terminals through the connection board, which is characterized in that:
- the board is a printed circuit board;
- the tracks are on the surface of the board not oriented towards the cells;
- the cables, wires o strips made of electrical conductive alloys connect the terminals to the connection tracks through said openings; and
- the welding is an ultrasound, laser or electric welding.
Therefore, the present invention is based on the fusion of two technologies, which have so far been isolated. Specifically, the present invention is based on battery technology combined with the technology of welding of PCBs used in electronics. This allows many welds at high speed, in an orderly and fully reliable manner. As will be seen, it allows for connection of a very large number of cells, and especially it allows for including connections to sensors, and also to make redundant connections. This is not possible in U.S. 4920019 A, wherein the features of the characterizing part of the first appended claim are not described.
In a first variant, all the cells have the same orientation, both terminals of each cell being accessible by the same end of the cell, being provided the board of openings for accessing both terminals, such that the connections between both terminals of each cell and the connection tracks are only carried out on the surface of the board not oriented towards the cells.
It can also be provided according to a second variant, apply the invention to a cells having opposed terminals, the cells being arranged with alternate terminals, and comprising in each side of the battery a connection board with the tracks in the surface of the board not oriented towards the cells.
Also advantageously, the board(s) include(s) the control electronics for each cell. This feature is especially advantageous. The inclusion of the control electronics for each cell in the prior art, is performed by dedicated especially plates, as described above. However, the present invention allows for including in a single board both the power connections and the control connections.
Preferably, the control electronics comprises current, voltage and temperature sensors and a data processor with status indicator output to a connection bus.
According to other optional features of the invention:
- the cables, wires o strips made of electrical conductive alloys are aluminium, copper or gold alloys.
- the board(s) are multilayer.
Advantageously, the battery comprises two connection cables between each terminal and the corresponding track.
The invention could be applied to any type of cells, but finds an advantageous application in cylindrical cells.
Advantageously, the cells are LiFePo4 cells.
Preferably, the gaps between cells form cooling channels, the board(s) being provided with openings coincident with said channels. The invention also relates to a battery manufacturing method starting from a plurality of rechargeable cells provided in at least one of their ends of terminals, which comprises the following steps:
- Arranging the cells in a support such that they form a matrix;
Obtaining at least a printed circuit board provided with connection tracks and of openings with a pattern designed for matching with said terminals once arranged onto the battery;
- Arranging the printed circuit board onto the battery with said openings coincident with the terminals and with the tracks in the surface of the board not oriented towards the cells;
Fixing the board to the support;
Connecting by means of cables, wires o strips of electrical conductive material welded by ultrasounds the terminals and the connection tracks.
Advantageously, the connection between each terminal and the corresponding track is carried out by means of two cables.
Preferably, the cables are aluminium, copper or gold alloys.
According to a particularly preferred variant of the invention , all the cells are arranged with the same orientation, leaving both terminals of each cell accessible by the same end of the cell, being provided the board of openings for accessing both terminals, such that the connections between both terminals of each cell and the connection tracks are only carried out on the surface of the board not oriented towards the cells.
According to another embodiment of the method, the cells are arranged with opposed terminals, the cells being arranged with alternate terminals, and arranging in each side of the battery a connection board with the tracks in the surface of the board not oriented towards the cells.
The method can include a previous stage of integrating the control electronics of each cell in the plate or plates .
Finally, the control electronics comprises current, voltage and temperature sensors and a data processor with status indicator output to a connection bus. Brief Description of the Figures
For a better understanding of what has been outlined some drawings are attached in which, schematically and solely by way of non-limiting example, a practical case of embodiment is shown.
Figure 1 is a section view showing the basic components of the battery and especially the connections.
Figure 2 is a plan view.
Description of a Preferred Embodiment
As can be seen in Figure 1 , the invention relates generally to a battery 1 comprising a plurality of rechargeable cells 2 arranged in a matrix, comprising at least a connection board 3 between terminals 4, 5 arranged in a face of the battery 1 and provided with connection tracks 6, the terminals 4, 5 being connected by means of cables, wires o strips made of electrical conductive alloys 7 and by means of welding to said connection tracks 6, the connection board 3 being provided with openings 8 for accessing said terminals 4, 5 through the connection board 3.
These features being already known, the present invention is characterized in that:
- the board 3 is a printed circuit board;
- the tracks 6 are on the surface of the board 3 not oriented towards the cells 2;
- the cables, wires o strips made of electrical conductive alloys 7 connect the terminals 4, 5 to the connection tracks 6 through said openings 5; and
- the welding is an ultrasound, laser or electric welding.
In the figures there is shown an embodiment wherein all the cells 2 have the same orientation, both terminals 4, 5 of each cell 2 being accessible by the same end of the cell 2, being provided the board 3 of openings 8 for accessing both terminals 4, 5, such that the connections between both terminals 4, 5 of each cell 2 and the connection tracks 6 are only carried out on the surface of the board 3 not oriented towards the cells 2. The inventive battery can be obtained with the following method: arranging the cells 2 in a support such that they form a matrix;
obtaining at least a printed circuit board 3 provided with connection tracks 6 and of openings 8 with a pattern designed for matching with said terminals 4, 5 once arranged onto the battery 1 ;
arranging the printed circuit board 3 onto the battery 1 with said openings 8 coincident with the terminals 4, 5 and with the tracks 4 in the surface of the board 3 not oriented towards the cells 2;
- fixing the board to the support;
connecting by means of cables, wires o strips of electrical conductive material 7 welded by ultrasounds the terminals 4, 5 and the connection tracks 6.
As can be seen in Figure 2, the connection between each terminal and the corresponding track is carried out by means of two o more cables.
Although reference has been made to a specific embodiment of the invention, it is apparent to one skilled in the art that the battery and method described are susceptible of numerous variations and modifications, and that all the details mentioned can be replaced by other technically equivalent, without departing from the scope of protection defined by the appended claims.

Claims

1. Battery (1) comprising a plurality of rechargeable cells (2) arranged in a matrix, comprising at least a connection board (3) between terminals (4, 5) arranged in a face of the battery (1) and provided with connection tracks (6), the terminals (4, 5) being connected by means of cables, wires o strips made of electrical conductive alloys (7) and by means of welding to said connection tracks (6), the connection board (3) being provided with openings (8) for accessing said terminals (4, 5) through the connection board (3), characterised in that:
- the board (3) is a printed circuit board;
- the tracks (4) are on the surface of the board (3) not oriented towards the cells (2);
- the cables, wires o strips made of electrical conductive alloys (7) connect the terminals (4, 5) to the connection tracks (6) through said openings (5); and
- the welding is an ultrasound, laser or electric welding.
2. Battery according to claim 1 , wherein all the cells (2) have the same orientation, both terminals (4, 5) of each cell (2) being accessible by the same end of the cell (2), the board (3) being provided with openings (8) for accessing both terminals (4, 5), such that the connections between both terminals (4, 5) of each cell (2) and the connection tracks (6) are only carried out on the surface of the board (3) not oriented towards the cells (2).
3. Battery according to claim 1 , wherein the cells have opposed terminals, the cells being arranged with alternate terminals, and comprising in each side of the battery a connection board with the tracks (6) in the surface of the board (3) not oriented towards the cells (2).
4. Battery according to any of the preceding claims, wherein the board(s) include(s) the control electronics for each cell.
5. Battery according to any of the preceding claims, wherein the control electronics comprises current, voltage and temperature sensors and a data processor with a status indicator output to a connection bus.
6. Battery according to any of the preceding claims, wherein the cables, wires o strips made of electrical conductive alloys are aluminium, copper or gold alloys.
7. Battery according to any of the preceding claims, wherein the board(s) (3) is/ are multilayer.
8. Battery according to any of the preceding claims, comprising two connection cables between each terminal and the corresponding track.
9. Battery according to any of the preceding claims, wherein the cells are cylindrical.
10. Battery according to any of the preceding claims, wherein the cells are LiFePo4 cells.
1 1. Battery according to any of the preceding claims, wherein the gaps between cells form cooling channels, the board(s) being provided with openings coincident with said canales.
12. Battery manufacturing method (1) starting from a plurality of rechargeable cells (2) provided with terminals (4, 5) in at least one of their ends, comprising the following steps:
- Arranging the cells (2) in a support such that they form a matrix;
Obtaining at least a printed circuit board (3) provided with connection tracks (6) and of openings (8) with a pattern designed for matching with said terminals (4, 5) once arranged onto the battery (1);
- Arranging the printed circuit board (3) onto the battery (1) with said openings (8) coincident with the terminals (4, 5) and with the tracks (4) in the surface of the board (3) not oriented towards the cells (2);
Fixing the board to the support;
Connecting by means of cables, wires o strips of electrical conductive material (7) welded by ultrasounds the terminals (4, 5) and the connection tracks (6).
13. Method according to claim 12, wherein the connection between each terminal and the corresponding track is carried out by means of two cables.
14. Method according to any of claims 1 1 to 12, wherein the cables are aluminium, copper or gold alloys.
15. Method according to any of claims 1 1 to 13, wherein all the cells (2) are arranged with the same orientation, leaving both terminals (4, 5) of each cell (2) accessible by the same end of the cell (2), the board (3) being provided with openings (8) for accessing both terminals (4, 5), such that the connections between both terminals (4, 5) of each cell (2) and the connection tracks (6) are only carried out on the surface of the board (3) not oriented towards the cells (2).
16. Method according to any of claims 1 1 to 13, wherein the cells are arranged with opposed terminals, the cells being arranged with alternate terminals, and arranging in each side of the battery a connection board with the tracks (4) in the surface of the board (3) not oriented towards the cells (2).
17. Method according to any of claims 1 1 to 16, wherein the board(s) include(s) the control electronics for each cell.
18. Method according to claim 17, wherein the control electronics comprises current, voltage and temperature sensors and a data processor with status indicator output to a connection bus.
PCT/IB2014/060972 2013-06-18 2014-04-24 Battery comprising a plurality of rechargeable cells arranged in a matrix WO2014203089A1 (en)

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