GB2526896A - Method for electrically connecting rechargeable battery cells to a circuit board by welding - Google Patents

Method for electrically connecting rechargeable battery cells to a circuit board by welding Download PDF

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Publication number
GB2526896A
GB2526896A GB1500088.8A GB201500088A GB2526896A GB 2526896 A GB2526896 A GB 2526896A GB 201500088 A GB201500088 A GB 201500088A GB 2526896 A GB2526896 A GB 2526896A
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GB
United Kingdom
Prior art keywords
conductive
battery cells
circuit board
rechargeable battery
apertures
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.)
Withdrawn
Application number
GB1500088.8A
Inventor
Donald P H Wu
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.)
Energy Control Ltd
Original Assignee
Energy Control 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 Energy Control Ltd filed Critical Energy Control Ltd
Publication of GB2526896A publication Critical patent/GB2526896A/en
Withdrawn legal-status Critical Current

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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
    • 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
    • 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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • 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
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
    • 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
    • H01M50/50—Current conducting connections for cells or batteries
    • 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
    • H01M50/509—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the type of connection, e.g. mixed connections
    • H01M50/51—Connection only in series
    • 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
    • H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
    • 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
    • H05K1/00—Printed circuits
    • H05K1/16—Printed circuits incorporating printed electric components, e.g. printed resistor, capacitor, inductor
    • 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
    • H05K1/00—Printed circuits
    • H05K1/18—Printed circuits structurally associated with non-printed electric components
    • 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
    • H05K3/40—Forming printed elements for providing electric connections to or between printed circuits
    • H05K3/4007—Surface contacts, e.g. bumps
    • H05K3/4015—Surface contacts, e.g. bumps using auxiliary conductive elements, e.g. pieces of metal foil, metallic spheres
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2200/00—Safety devices for primary or secondary batteries
    • 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
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/40—Forming printed elements for providing electric connections to or between printed circuits
    • H05K3/4038—Through-connections; Vertical interconnect access [VIA] connections
    • H05K3/4046—Through-connections; Vertical interconnect access [VIA] connections using auxiliary conductive elements, e.g. metallic spheres, eyelets, pieces of wire
    • 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

Abstract

A method for electrically connecting a plurality of rechargeable battery cells 60 to a circuit board 40 having a top surface 41 and a bottom surface 42 comprises: providing a plurality of apertures 43 in the circuit board 40; placing conductive members 50 at each of the apertures 43; placing a conductive terminal of a battery cell (figure 6, 61) into contact with each of the conductive members 50, defining a work area on a surface of the conductive member 50 surrounded by the aperture 43; and welding the conductive member 50 to the conductive terminal (figure 6, 61) by inserting a welding device A into the work area though the aperture 43 from the top surface 41. The conductive members 50 may have a flat structure and be placed on the bottom surface 42 adjacent the apertures 43. Alternatively, the conductive members may have a step structure with one section (figure 9, 53) with a slot (figure 9, 531) being placed on the conductive terminal (figure 6, 61); and another section (figure 9, 51) being electrically connected to the top surface 41. Alternatively, the conductive member 50 may include a conductive annular flange (figure 12, 55) connected to the top surface 41, and a cavity (figure 12, 54) wherein the bottom section (figure 12, 542) is welded to the conductive terminal (figure 6, 61).

Description

METHOD FOR ELECTRICALLY CONNECTING RECHARGEABLE
BATTERY CELLS TO A CIRCUIT BOARD BY WELDING
BACKGROUND OF THE INVENTION
Field of the Invention
The present invention relates to an electric connection method for a battery pack, and more particularly to a method for electrically connecting rechargeable battery cells to a circuit board by welding.
Description of the Prior Art
A battery pack generally comprises a plurality of cylindrical or square battery cells which are connected in series or parallel, and then nickel connecting members are fixed by dot welding or screwing to the positive and negative terminals as conductive, so that the battery cells are electrically connected. When a circuit protection component (also commonly known as fuse) needs to be provided on the respective battery cells, it has to use a connecting member to electrically connect the circuit protection component in a suspending manner, which not only makes wiring complicated, but also reduces connection stability of the circuit protection component.
To enhance the connection stability, the circuit protection component is connected to a circuit board via a connecting pin, and then the circuit board is connected to the battery cells. However, Fig. 1 shows a battery pack using circuit board as electric connection of battery cells, wherein one surface of the circuit board 11 is provided a plurality of conductive pieces Ill, the circuit board 11 is connected to the positive and negative terminals of the battery cells 12 via the conductive pieces 111, and another surface of the circuit board 11 is welded with a welding device A to weld the battery cells 12 to the circuit board 11. However, the operation of welding the battery cells 12 to the circuit board 11 is performed on the other surface of the circuit board 11 rather than the surface where the conductive pieces iii are disposed, and it is impossible to see from this side to see the location of the battery cells 12. Therefore, it requires a special tool to locate the position of the battery cells 12 during welding operation.
Fig. 2 shows another connection structure between the circuit board 21 and the battery cells 22, wherein a plurality of metal pieces 23 is connected to the conductive terminals at both ends of the battery cells 22 first, then a circuit board 21 provided with a plurality of engaging portions 211 is electrically connected to the metal pieces 23. Each of the engaging portions 211 includes a connecting hole 212 with an elastic inward protruding arc-shaped inner surface 213 which comes into contact with a corresponding one of the metal pieces 23 when the metal piece 23 is inserted into the connecting hole 212, then the welding device A is used to perform welding on the relatively small surface of the engaging portions 211, as shown in Fig. 3. The circuit board 21 must be held steady during the welding operation, which makes the welding more difficult. Besides, the conductive terminals of the battery cells and the circuit board 21 is comiected by the metal pieces 23 and the elastic inner surface 213, the multiple-layer connection structure will cause current loss and also make the welding more difficult.
Fig. 4 shows another connection structure between the circuit board 31 and the battery cells 32, wherein a plurality of metal pieces 33 is connected to the conductive terminals at both ends of the battery cells 32 first, and then the metal pieces 33 are inserted in positioning slots 311 of the circuit board 31 Since the circuit board 31 covers the metal pieces 33, it is impossible from outer surface of the circuit board 31 to know the locations of the metal pieces 33. Therefore, this connection structure requires a positioning device 34 which is provided with welding-location indicating portions 341 to indicate the welding positions. Once the sequence of the battery cells 32 changes, a new positioning device and circuit board must be used in order to position and indicate the position of the metal pieces 33, which not only increases manufacturing cost but also makes the manufacturing procedure complicated.
The present invention has arisen to mitigate and/or obviate the afore-described disadvantages.
SUMMARY OF THE INVENTION
The primary objective of the present invention is to provide a method for electrically connecting rechargeable battery cells to a circuit board by welding, which is free of the disadvantages of the abovementioned conventional battery pack.
To achieve the above objective, a method for electrically connecting rechargeable battery cells to a circuit board by welding comprises a step of providing the circuit board and a step of preparing conductive members and the rechargeable battery cells, the step of providing a circuit board includes providing the circuit board with a top surface, a bottom surface, and a plurality of apertures penetrating through the top and bottom surfaces. Each of the apertures has an inner peripheral surface which is connected between the top and bottom surfaces to define each of the apertures. The step of preparing the conductive members and the rechargeable battery cells includes placing the conductive members corresponding to the quantity of the apertures at the apertures, and placing one said rechargeable battery cell at each of the conductive members, in such a manner that a conductive terminal of each of the rechargeable battery cells conies into contact with one surface of a corresponding one of the conductive members. The method is characterized in that: a step of defining a work area by the apertures and the conductive members is carried out after the step of preparing the conductive members and the rechargeable battery cells and includes defining an area on another surface of the corresponding one of the conductive members surrounded by a corresponding one of the apertures as the work area; and a step of welding includes forming electric connection between the corresponding one of the conductive members and the conductive terminal of a corresponding one of the rechargeable battery cells by inserting a welding device from the top surface of the circuit board through the aperture and into the work area of the corresponding one of the conductive members to perform welding operation.
The apertures of the circuit board define a work area (welding position) on the conductive members to improve welding accuracy.
BRIEF DESCRIPTION OF TIlE DRAWINGS
Fig. 1 shows a conventional battery pack using circuit board as electric connection of battery cells; Fig. 2 shows another conventional battery pack using circuit board as electric comiection of battery cells; Fig. 3 is a cross sectional view of a part of Fig. 2; Fig. 4 shows another conventional battery pack using circuit board as electric connection of battery cells; Fig. 5 is a flow chart of a method for electrically connecting rechargeable battery cells to a circuit board by welding iii accordance with a preferred embodiment of the present invention; Fig. 6 is an illustrative view showing the step of preparing conductive members and rechargeable battery cells of the method for electrically connecting rechargeable battery cells to the circuit board by welding in accordance with the present invention; Fig. 7 is an illustrative view showing the status after the step of preparing conductive members and rechargeable battery cells of the method for electrically connecting rechargeable battery cells to the circuit board by welding in accordance with the present invention; Fig. 8 is an illustrative view showing the step of welding of the method for electrically connecting rechargeable battery cells to the circuit board by welding in accordance with the present invention; Fig. 9 is an illustrative view showing the step of preparing conductive members and rechargeable battery cells of the method for electrically connecting rechargeable battery cells to the circuit board by welding in accordance with another embodiment of the present invention; Fig. 10 is an illustrative view showing the status after the step of preparing conductive members and rechargeable battery cells of the method for electrically connecting rechargeable battery cells to the circuit board by welding in accordance with another embodiment of the present invention; Fig. 11 is an illustrative view showing the step of welding of the method for electrically connecting rechargeable battery cells to the circuit board by welding in accordance with another embodiment of the present invention; Fig. 12 is an illustrative view showing the step of preparing conductive members and rechargeable battery cells of the method for electrically connecting rechargeable battery cells to the circuit board by welding in accordance with a further embodiment of the present invention; Fig. 13 is an illustrative view showing the status after the step of preparing conductive members and rechargeable battery cells of the method for electrically connecting rechargeable battery cells to the circuit board by welding in accordance with yet another embodiment of the present invention; Fig. 14 is an illustrative view showing the step of welding of the method for electrically connecting rechargeable battery cells to the circuit board by welding in accordance with another embodiment of the present invention; Fig. 15 is an illustrative view showing the step of preparing conductive members and rechargeable battery cells of the method for electrically connecting rechargeable battery cells to the circuit board by welding in accordance with a further embodiment of the present invention; and Fig. 16 is an illustrative view showing the status after the step of preparing conductive members and rechargeable battery cells of the method for electrically connecting rechargeable battery cells to the circuit board by welding in accordance with yet another embodiment of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODfMENTS
The present invention will be clearer from the following description when viewed together with the accompanying drawings, which show, for purpose of illustrations only, the preferred embodiment iii accordance with the present invention.
Referring to Figs. 5-16, a method for electrically connecting rechargeable battery cells to a circuit board by welding in accordance with a preferred embodiment of the present invention comprises the following steps: Step I of providing a circuit board includes providing a circuit hoard 40 with a top surface 41, a bottom surface 42, and a plurality of apertures 43 penetrating through the top and bottom surfaces 41, 42. Each of the apertures 43 has an inner peripheral surface 431 which is connected between the top and bottom surfaces 41, 42 to define the aperture 43.
A step 11 of preparing conductive members and rechargeable battery cells includes placing conductive members 50 corresponding to the quantity of the apertures 43 at the apertures 43, and placing a rechargeable battery cell 60 at each of the conductive members 50, in such a manner that a conductive terminal 61 of each of the rechargeable battery cells 60 comes into contact with one surface of a corresponding one of the conductive members 50.
A step III of defining a work area by the apertures and conductive members includes defining an area on another surface of each of the conductive member 50 surrounded by a corresponding one of the apertures 43 as a work area.
A step IV of welding includes forming electric connection between the conductive members 50 and tile conductive terminals 61 of the rechargeable battery cells 60 by inserting a welding device A from the top surface 41 of tile circuit board through an aperture 43 and into the work area of a corresponding one of the conductive members 50 to perform welding, The present invention defines a specific work area by using the circuit board and the conductive members 50, so that the user can easily insert the welding device A into the work area to perform welding operation simply by inserting it into the apertures 43, without bothering to align or calculate the welding position, which makes the weiding easier while improving the welding quality.
The form of the conductive members 50 used in the method for electrically connecting rechargeable battery cells to the circuit board by welding in accordance with the present invention is not restricted, it can be a flat structure, as shown in Figs. 6-8. During the step II of preparing conductive members and rechargeable battery cells, each of the conductive members 50 is placed at a corresponding one of the apertures 43 of the circuit board 40 and located between the bottom surface 42 of the circuit board 40 and a corresponding one of the rechargeable battery cells 60, in such a manner that the conductive member 50 has two surfaces contacting the bottom surface 42 of the circuit board 40 and the conductive terminal 61 of the corresponding one of the rechargeable battery cells 60, as shown in Fig. 6. Tn the step TV of welding, the welding device A can be easily inserted into the work area defined by the aperture 43 and the conductive member 50 to perform welding operation simply by inserting into the apertures 43, so as to form electric connection
S
between the conductive members 50 and tile rechargeabie battery cells 60 via accurate welding, as shown in Fig. 8.
As shown in Figs. 9-li, each of the conductive members 50 can also be a stepped structure provided with a first conductive section 5 1, a second conductive section 53, arid a medium section 52 which is connected between and perpendicular to the first and second conductive sections 5 1, 53. The first and second conductive sections 51, 53 extend in opposite directions. During the step II of preparing conductive members and rechargeable battery cells, each of the conductive members has the first conductive section 51 electrically connected to the top surface 41 of the circuit board 40, the medium section 52 abutted against the inner peripheral surface 431 of a corresponding one of the apertures 43, and has the second conductive section 53 inserted through the aperture 43 and extended out of the bottom surface 42. As compared with the flat conductive member 50, the stepped conductive members 50 has the first conductive section 51 abutted against the top surface 41 of the circuit board 40, so that the conductive members 50 can be positioned during the step II of preparing conductive members and rechargeable battery cells, which makes it easy to carry out the next step IV of welding. Besides, the second conductive section 53 can be provided with a slot 531 which prevents warp or distortion of the second conductive section 53 during the step IV of welding.
During the step III of defining a work area, the work area is defined on one surface of the second conductive section 53 by a corresponding one of the apertures 43, and another surface of the second conductive section 53 is electrically connected to the conductive terminal 61 of a corresponding one of the rechargeable battery cells 60, as shown in Fig. 10. hi the step IV of welding, the welding device A can be easily inserted into the work area defined by the aperture 43 and the conductive member 50 to perform welding operation simply by inserting into the apertures 43, so as to form electric connection between the conductive members 50 and the rechargeable battery cells 60 via accurate welding, as shown in Fig. Ii.
As shown in Figs. 12-14, each of the conductive members 50 includes a cavity 54 and a conductive annular flange 55 formed around the periphery of the cavity 54. The cavity 54 includes an opening 541 and a conductive bottom 542. The conductive annular flange 55 is located around and connected to tile opening 541.
Each of the apertures 43 of the circuit board 40 is formed in the shape of the cavity 54. During the step II of preparing conductive members and rechargeable battery cells, the conductive annular flange 55 of the conductive members 50 is electrically connected to and abutted against the top surface 41 of the circuit board 40, and the outer surface of the cavity 54 is abutted against the inner peripheral surface 431 of the corresponding one of the apertures 43, so as to make each of the cavities 54 aligned to the corresponding one of the apertures 43. During the step III of defining a work area, the work area is defined on one surface of the conductive bottom 542 of the cavity 54 by the corresponding aperture 43, and another surface of the conductive bottom 542 is electrically connected to the conductive terminal 61 of a corresponding one of the rechargeable battery cells 60, as shown in Fig. 12. In the step TV of welding, the welding device A can be easily inserted into the work area defined by the aperture 43 and the conductive member 50 to perform welding operation simply by inserting into the apertures 43, so as to form electric connection I0 between the conductive members 50 and tile rechargeable battery cells 60 via accurate welding, as shown in Fig. 14. In this embodiment, both tile cavities 54 and the apertures 43 are square-shaped.
As shown in Figs. 15-16, another embodiment of the conductive member 50 is similar to the previous embodiment, except that the cavities 54 and the apertures 43 are circular-shaped.
The apertures 43 of the circuit board 40 define a work area (welding position) on the conductive members 50 to improve welding accuracy. Besides, the conductive members 50 each have the first conductive section 51 or the conductive annular flange 55 abutted against the top surface 41 of the circuit board 40, and has the medium section 52 or the outer surface of the cavity 54 abutted against the inner peripheral surface 431 of the apertures 43, so that the conductive members 50 can be firmly positioned prior to the welding procedure, making it easy to carry out the following welding operation. During the step IV of welding, the medium section 52 or the outer surface of the cavity 54 can be inserted into the apertures 43 to improve convenience and stability of the welding operation. Besides, each of the conductive members 50 has the first conductive section 51 and medium section 52 abutted against the top surface 41 of the circuit board 40 and the inner peripheral surface 431 of a corresponding one of the apertures 43, respectively, so that the conductive members 50 are restricted in the apertures 43 to improve connection stability.
While we have shown and described various embodiments in accordance with the present invention, it is clear to those skilled in the art that further embodiments may be made without departing from the scope of the present I! invention.

Claims (6)

  1. WHAT IS CLAIMED IS: 1. A method for electrically connecting rechargeable battery cells to a circuit board by welding comprising a step of providing the circuit board and a step of preparing conductive members and tile rechargeable battery cells, the step of providing a circuit board including providing the circuit board with a top surface, a bottom surface, and a plurality of apertures penetrating through the top and bottom surfaces, each of the apertures having an inner peripheral surface which is connected between the top and bottom surfaces to define each of the apertures, the step of preparing the conductive members and the rechargeable battery cells including placing the conductive members corresponding to the quantity of the apertures at the apertures, and placing one said rechargeable battery cell at each of the conductive members, in such a manner that a conductive terminal of each of the rechargeable battery cells comes into contact with one surface of a corresponding one of the conductive members; the method being characterized in that: a step of defining a work area by the apertures and the conductive members is carried out after the step of preparing the conductive members and the rechargeable battery cells and includes defining an area on another surface of the corresponding one of the conductive members surrounded by a corresponding one of the apertures as the work area; and a step of welding includes forming electric connection between the corresponding one of the conductive members and the conductive terminal of a corresponding one of the rechargeable battery cells by inserting a welding device from the top surface of the circuit board through the aperture and into the work area of the corresponding one of the conductive members to perform welding operation.
  2. 2. The method for electrically connecting the rechargeable battery cells to the circuit board by welding as claimed in claim 1, wherein each of the conductive members is a flat structure, during the step of preparing the conductive members and the rechargeable battety cells, each of the conductive members is placed at the corresponding one of the apertures of the circuit board and located between the bottom surface of the circuit board and the corresponding one of the rechargeable battery cells, in such a manner that the conductive member each have two surfaces contacting the bottom surface of the circuit board and the conductive terminal of the corresponding one of the rechargeable battery cells, and during the step of welding, the welding device is inserted into the work area to perform welding operation by inserting into the corresponding one of the apertures to perform welding operation.
  3. 3. The method for electrically connecting the rechargeable battery cells to the circuit board by welding as claimed in claim 1, wherein each of the conductive members is a stepped structure provided with a first conductive section, a second conductive section, and a medium section which is connected between and perpendicular to the first and second conductive sections, the first and second conductive sections extend in opposite directions, during the step of preparing conductive members and rechargeable battery cells, each of the conductive members has the first conductive section electrically connected to the top surface of the circuit board, the medium section abutted against the inner peripheral surface of the corresponding one of the apertures, and has the second conductive section inserted through the aperture and extended out of the bottom surface, during the step of defining a work area, the work area is defined on one surface of the second conductive section by the corresponding one of the apertures, and another surface of the second conductive section is electrically connected to the conductive terminal of the corresponding one of the rechargeable battery cells, during the step of welding, the welding device is inserted into the work area to perform welding operation by inserting into the corresponding one of the apertures to perform welding operation.
  4. 4. The method for electrically connecting the rechargeable battery cells to the circuit board by welding as claimed in claim 3, wherein the second conductive section is provided with a slot, the welding operation is performed at the second conductive section.
  5. 5. The method for electrically connecting the rechargeable battery cells to the circuit board by welding as claimed in claim 1, wherein each of the conductive members includes a cavity and a conductive annular flange formed around the periphery of the cavity, the cavity includes an opening and a conductive bottom, the conductive annular flange is located around and connected to the opening, each of the apertures of the circuit board is formed in the shape of the cavity, during the step of preparing conductive members and rechargeable battery cells, the conductive annular flange of the conductive members is electrically connected to and abutted against the top surface of the circuit board, and an outer surface of the cavity is abutted against the iimer peripheral surface of the corresponding one of the apertures, so as to make each of the cavities aligned to the corresponding one of the apertures, during the step of defining the work area, the work area is defined on one surface of the conductive bottom of the cavity by the corresponding aperture, and anotherISsurface of the conductive bottom is electrically connected to the conductive terminal of the corresponding one of the rechargeable battery cells, during the step of welding, the welding device is inserted into the work area to perform welding operation by inserting into the corresponding one of the apertures to perform welding operation.
  6. 6. A method for electrically connecting rechargeable battefy cells substantially as hereinbefore described with reference to and as shown in Figures 5 - 16 of the accompanying drawings.
GB1500088.8A 2014-01-24 2015-01-06 Method for electrically connecting rechargeable battery cells to a circuit board by welding Withdrawn GB2526896A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1401184.5A GB2522443A (en) 2014-01-24 2014-01-24 Battery pack using circuit board as electric connection to connect battery cells

Publications (1)

Publication Number Publication Date
GB2526896A true GB2526896A (en) 2015-12-09

Family

ID=50287484

Family Applications (2)

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GB1401184.5A Withdrawn GB2522443A (en) 2014-01-24 2014-01-24 Battery pack using circuit board as electric connection to connect battery cells
GB1500088.8A Withdrawn GB2526896A (en) 2014-01-24 2015-01-06 Method for electrically connecting rechargeable battery cells to a circuit board by welding

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KR102415121B1 (en) * 2017-09-22 2022-06-30 삼성에스디아이 주식회사 Battery pack
CN111081964B (en) * 2019-12-24 2022-08-09 Oppo广东移动通信有限公司 Battery pack for terminal equipment and terminal equipment with battery pack
GB2605787A (en) * 2021-04-12 2022-10-19 Upgrade Tech Engineering Ltd A battery cell holder

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WO2001018891A1 (en) * 1999-09-08 2001-03-15 Motorola Inc. Contact system for interconnection of substrate and battery cell
US6495787B1 (en) * 1999-09-20 2002-12-17 Alcatel Electrical connection system between an electrochemical cell and a printed circuit
WO2009051388A2 (en) * 2007-10-18 2009-04-23 Lg Chem, Ltd. Secondary battery pack having excellent energy density and pcm assembly therefor
US20100159287A1 (en) * 2008-12-18 2010-06-24 Samsung Sdi Co., Ltd. Secondary battery including protection circuit module
US20110151288A1 (en) * 2009-12-22 2011-06-23 Sang-Do Heo Metal tab and secondary battery using the same
US20120028082A1 (en) * 2010-07-28 2012-02-02 Myung-Jun Lee Battery pack
KR20130065686A (en) * 2013-05-31 2013-06-19 박용미 Battery pack and production method for the same

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GB2522443A (en) 2015-07-29

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