CN101389185A - Protection circuit board, battery pack including the protection circuit board and method of fabricating the protection circuit board - Google Patents

Protection circuit board, battery pack including the protection circuit board and method of fabricating the protection circuit board Download PDF

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Publication number
CN101389185A
CN101389185A CNA2008102129628A CN200810212962A CN101389185A CN 101389185 A CN101389185 A CN 101389185A CN A2008102129628 A CNA2008102129628 A CN A2008102129628A CN 200810212962 A CN200810212962 A CN 200810212962A CN 101389185 A CN101389185 A CN 101389185A
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CN
China
Prior art keywords
protective circuit
circuit plate
hole
lead terminal
battery pack
Prior art date
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Granted
Application number
CNA2008102129628A
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Chinese (zh)
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CN101389185B (en
Inventor
洪奇成
朴仁奎
金佑彻
崔范国
金昌镐
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Samsung SDI Co Ltd
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Samsung SDI Co Ltd
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Filing date
Publication date
Priority claimed from KR1020070096180A external-priority patent/KR101384930B1/en
Priority claimed from KR1020070102469A external-priority patent/KR100951905B1/en
Application filed by Samsung SDI Co Ltd filed Critical Samsung SDI Co Ltd
Publication of CN101389185A publication Critical patent/CN101389185A/en
Application granted granted Critical
Publication of CN101389185B publication Critical patent/CN101389185B/en
Expired - Fee Related legal-status Critical Current
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    • 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
    • H01M50/169—Lids or covers characterised by the methods of assembling casings with lids by welding, brazing or soldering
    • 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
    • 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
    • H01M50/529—Intercell connections through partitions, e.g. in a battery 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
    • H01M50/543—Terminals
    • 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
    • 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

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Manufacturing & Machinery (AREA)
  • Battery Mounting, Suspending (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

The invention discloses a protection circuit board, comprising a batery of the protection circuit board and a method of fabricating the protection circuit board. The protection circuit board resulting in a compact battery pack has a higher capacity than a conventional battery pack of the same size, a battery pack including the protection circuit board and a method of fabricating the protection circuit board includes: a first lead terminal disposed on a first side of the protection circuit board; and a first aperture for exposing the first lead terminal to a second side of the protection circuit board. The battery pack also includes: a bare cell including an electrode terminal; a second lead terminal arranged over the electrode terminal; and a protection circuit board electrically connected to the second lead terminal and the bare cell, and having an aperture for exposing the second lead terminal arranged the first side of the protection circuit board to the second side of the protection circuit board.

Description

Protective circuit plate, battery pack and manufacture method thereof
Technical field
The present invention relates to a kind of protective circuit plate, comprise the battery pack of this protective circuit plate and the method for making this protective circuit plate; and relate in particular to such protective circuit plate; by changing the electrical connection between plain battery and this protective circuit plate; this protective circuit plate is compared with the conventional batteries with same size; can realize compact battery and high power capacity, and the method that relates to the battery pack that comprises this protective circuit plate and make this protective circuit plate.
Background technology
In recent years, the handheld electronic/electric device of various compactnesses is as extensively development and production such as cell phone, notebook computer, video camera.Handheld electronic/electric device comprises the battery pack that is installed in wherein, so that work under the situation that does not have independent power supply.Battery pack can be divided into nickel-cadmium (Ni-Cd) battery, nickel-metal hydrides (Ni-MH) battery and lithium (Li) battery.Consider economic benefit, use the battery pack of utilizing secondary cell (rechargeable battery) usually.
In various types of batteries, lithium rechargeable battery is owing to its bigger being widely used in handheld electronic/electric device of energy density than Ni-Cd battery and three times of high operating voltages of Ni-MH battery and per unit weight.Lithium rechargeable battery can be divided into lithium ion battery that utilizes liquid electrolyte and the lithium polymer battery that utilizes polyelectrolyte according to the type of electrolyte, perhaps can be divided into cylindrical, rectangle or pouch-type battery according to its shape.
Usually, battery pack comprises the plain battery that can be recharged or discharge, and the protective circuit plate that is electrically connected with plain battery.
This plain battery by will comprise positive plate, negative plate and be arranged on positive plate and negative substrate between the electrode assemblie of dividing plate and electrolyte be contained in the jar and and constitute with the cap assembly hermetically sealed can that comprises electrode terminal, wherein said electrode terminal is electrically connected on positive plate or the negative plate.
Not positive plate that is electrically connected with electrode terminal or negative plate be electrically connected on the cover plate of cap assembly or jar on, the latter is thus as a terminal, and electrode terminal and cover plate or jar electric insulation.
The protective circuit plate is electrically connected on the electrode terminal of plain battery, and is connected on cover plate or the jar, controls voltage or electric current in the plain battery charge/discharge process thus, prevents plain battery overvoltage or overcurrent.
Battery pack is to form by electrode assemblie being arranged in the opening on jar side.This electrode assemblie comprise positive plate and negative plate and be formed on positive plate and negative plate between dividing plate, this positive plate and negative plate are to form by active positive electrode material and negative electrode active material are applied on positive electrode current-collector (collector) and the negative electrode current-collector, and positive electrode, negative electrode and dividing plate pile up and reel then.
Then, cap assembly is installed to the open side of jar, and electrolyte is injected in the jar by the electrolyte injecting hole on the cap assembly, and electrolyte injecting hole is sealed, thereby finishes plain battery.
Subsequently; being electrically connected to the electrode terminal of plain battery and first lead plate and second lead plate on cover plate or the jar respectively is electrically connected on third and fourth lead plate; the latter is electrically connected on the protective circuit plate; utilize resin to fill the space that the electrical connection between first to the 4th lead plate brings; prevent from thus between plain battery and protective circuit plate, electrical short to take place, thereby finish battery pack.
For plain battery being electrically connected on the protective circuit plate; in traditional battery pack; first and second lead plates that are electrically connected on the plain battery utilize brazing process or welding process; as electric resistance welding; be electrically connected to third and fourth lead plate that is electrically connected with the protective circuit plate, and between plain battery and protective circuit plate, must form the space of specific dimensions so that steadily welding.Thereby the space between plain battery and protective circuit plate must not be less than scheduled volume.
And in order to prevent the electrical short that takes place that moves owing to plain battery and protective circuit plate, the space between plain battery and protective circuit plate must be filled.Yet, defective can appear in filling process, and perhaps plain battery or protective circuit plate are shifted, and make electrical connection instability between them thus.
Summary of the invention
The invention provides a kind of protective circuit plate; compare with the conventional batteries of same size; this protective circuit plate can realize having the more compact battery of high power capacity; and by the bond strength between raising plain battery of the electrical connection between change plain battery and the protective circuit plate and the protective circuit plate; and do not need molding process, make space minimum between plain battery and the protective circuit plate.The present invention also provides a kind of battery pack of this protective circuit plate and method of making this protective circuit plate of comprising.
According to an aspect of the present invention, provide a kind of protective circuit plate of battery pack, it comprises: first lead terminal that is provided with in a side of protective circuit plate; And first hole that is used for first lead terminal is exposed to the opposite side of this protective circuit plate.
According to a further aspect in the invention, provide a kind of battery pack, it comprises: the plain battery that comprises electrode terminal; Be arranged on second lead terminal on this electrode terminal; And be electrically connected to protective circuit plate on this second lead terminal and the plain battery, and this protective circuit plate has the 3rd hole, and second lead terminal that is used for being arranged on protective circuit plate one side is exposed to the opposite side of this protective circuit plate.
In accordance with a further aspect of the present invention, provide a kind of method of making the protective circuit plate, this method comprises: prepare to have the plain battery and the protective circuit plate of electrode terminal, this protective circuit plate has octal; The 5th lead terminal is arranged on makes it on the side of protective circuit plate by the local at least opposite side that is exposed to this protective circuit plate of described octal; The 5th electrode terminal is electrically connected with the protective circuit plate; Plain battery and protective circuit plate are arranged such that the 5th lead terminal is arranged on the described electrode terminal; And the 5th lead terminal is electrically connected to described electrode terminal by described octal.
Description of drawings
By in conjunction with the accompanying drawings with reference to the following detailed description, more complete understanding of the present invention and many attendant advantages of the present invention will be more readily understood, the identical identical or similar elements of designated among the figure, among the figure:
Fig. 1 is the decomposition diagram of the battery pack of first exemplary embodiment according to the present invention;
Fig. 2 A and 2B are the cross-sectional views in the hole that forms in the protective circuit plate of battery pack of first exemplary embodiment according to the present invention;
Fig. 2 C is the decomposition diagram of the lead terminal of the battery pack of first exemplary embodiment according to the present invention;
Fig. 3 A and 3B are respectively the decomposition diagram and the cross-sectional views of the battery pack of second exemplary embodiment according to the present invention;
Fig. 4 is the decomposition diagram of the battery pack of the 3rd exemplary embodiment according to the present invention;
Fig. 5 is the decomposition diagram of the battery pack of the 4th exemplary embodiment according to the present invention;
Fig. 6 A and 6B are the cross-sectional views in the hole that forms in the protective circuit plate of battery pack of the 4th exemplary embodiment according to the present invention;
Fig. 6 C is the cross-sectional view of the lead terminal of the battery pack of the 4th exemplary embodiment according to the present invention; And
Fig. 7 is the decomposition diagram of the battery pack of the 5th exemplary embodiment according to the present invention.
Embodiment
Above and other objects of the present invention, feature and function are described with reference to the accompanying drawings more comprehensively.In addition, in the accompanying drawings, the length and the thickness in element or zone are exaggerated for clarity.And identical Reference numeral is known components identical in the acceptance of the bid of whole specification, and a part is connected on another part, meaning person they or directly connection, or be electrically connected to each other and between them, have the 3rd device.
Fig. 1 is the decomposition diagram of the battery pack of first exemplary embodiment according to the present invention, and Fig. 2 A and 2B are the cross-sectional views in the hole that forms in the protective circuit plate of battery pack of first exemplary embodiment according to the present invention.
With reference to Fig. 1,2A and 2B; the battery pack of first exemplary embodiment comprises according to the present invention: plain battery 1100, be arranged on first lead terminal 1300 and protective circuit plate 1200 on the electrode terminal of plain battery 1100; this protective circuit plate 1200 is connected on the plain battery 1100 by first lead terminal 1300, and has first hole 1240 corresponding to a part of first lead terminal 1300.
Plain battery 1100 comprises electrode assemblie 1110, hold the cap assembly 1130 of electrolyte (not shown) with jars 1120 and the hermetically sealed can 1120 that allow that lithium ion moves electrode assemblie 1110 in.Electrode assemblie 1100 comprises: positive electrode plate 1111, and this positive electrode plate 1111 has the positive electrode contact pin 1114 that is connected on the positive electrode current-collector (not shown), and the active positive electrode material (not shown) is applied on this positive electrode current-collector; Negative electrode plate 1112, this negative electrode plate 1112 has the negative electrode contact pin 1115 that is connected on the negative electrode current-collector (not shown), and the negative electrode active material (not shown) is applied on this negative electrode current-collector; And dividing plate 1113, this dividing plate is interposed between described positive electrode plate 1111 and the negative electrode plate 1112.
In Fig. 1, positive electrode contact pin 1114 is arranged on an edge of jar 1120, and negative electrode contact pin 1115 is arranged on the centre of jar 1120, and negative electrode contact pin 1115 is electrically connected on the electrode terminal 1132 of cap assembly 1130.But positive electrode contact pin 1114 and negative electrode contact pin 1115 can be provided with on the contrary, and are different from diagram, and one in positive electrode contact pin 1114 and the negative electrode contact pin 1115 can be projected into jar 1120 downwards, so that be electrically connected to jar 1120.
Active positive electrode material can comprise and contains lithium transition metal oxide and lithium chalkogenide compound, as LiCoO 2, LiNiO 2, LiMnO 2, LiMn 2O 4And LiNi 1-x-yCoxM Y-2(at this, 0 ≠ x ≠ 1,0 ≠ y ≠ 1,0 ≠ x+y ≠ 1, M are metals, as Al, Sr, Mg or La), and negative electrode active material can comprise material with carbon element, as crystalline carbon, amorphous carbon, carbon complex compound and carbon fiber, lithium metal and lithium alloy.
Positive electrode current-collector and negative electrode current-collector can be from being formed by the metal of selecting the group that stainless steel, nickel, copper, aluminium and alloy thereof constituted, preferably, the positive electrode current-collector is that aluminum or aluminum alloy forms, and the negative electrode current-collector is formed by copper or copper alloy, so that their usefulness maximums.
Dividing plate 1113 is interposed between positive electrode plate 1111 and the negative electrode plate 1112, to prevent electrical short and to allow the lithium ion motion.Dividing plate 1113 can be formed by the polymeric layer of polyolefin series, is for example formed or is formed by its multilayer by polyethylene (PE) or polypropylene (PP).
As shown in Figure 1, jar 1120 can be formed by the prismatic metal material, has the top of opening, or forms cylindrical or bag shape.Jars 1120 can be formed by aluminium, aluminium alloy or stainless steel, and they are in light weight and have a flexibility, with as terminal.
The cap assembly 1130 that is installed to the top of jars 1120 opening comprises cover plate 1131, insulation board 1135, terminal board 1134, insulating lid 1136 and electrode terminal 1132.Cover plate 1131 is metallic plates, and its size and dimension is corresponding with the open top of jar 1120, and comprises terminal hole 1131c, electrolyte injecting hole 1131a and the safe air vent hole (not shown) of preliminary dimension.Safe air vent hole can be formed in any zone of not interfering terminal through-hole 1131c and electrolyte injecting hole 1131a, perhaps can be formed on the side of jar 1120.
Electrolyte injecting hole 1131a is injected with the electrolyte that is beneficial to lithium ion motion in the jar 1120 of hold electrodes assembly 1110.After jar 1120 was by cap assembly 1130 sealings, electrolyte injected by electrolyte injecting hole 1131a, clogs electrolyte injecting hole 1131a with electrolyte injecting hole plug 1131b then.
Terminal through-hole 1131c will insert electrode terminal 1132, and this electrode terminal 1132 is electrically connected to the terminal board 1134 that is arranged under the cover plate 1131 by terminal through-hole 1131c.For with electrode terminal 1132 and cover plate 1131 insulation, rubber or have the packing ring that the non-conducting material of good insulation characteristic forms and be provided with around electrode terminal 1132.
Insulation board 1135 and terminal board 1134 are successively set under the cover plate 1131, and terminal board 1134 is electrically connected in the negative electrode contact pin 1115 of electrode assemblie 1110 realization electrical connection between the electrode terminal 1132 of a poem and the negative electrode contact pin 1115.Insulation board 1135 is terminal board 1134 and cover plate 1131 electric insulations, so that can short circuit, even cover plate 1131 is electrically connected in the positive electrode contact pin 1114 of electrode assemblie 1110.
Insulating lid 1136 is along the opening direction setting of the jar 1120 of electrode assemblie 110, so that the positive electrode contact pin 1114 of fixed electrode assembly 1110 and negative electrode contact pin 1115.Insulating lid 1134 is by the insulating polymer resin, and polyphenylene oxide (PPO) formation as polypropylene (PP), polyphenylene sulfide (PPS), polyether sulfone (PES) or modification has the support portion at its edge, to be provided for laying the space of terminal board 1134 and insulation board 1135.
Protective circuit plate 1200 has the external terminal 1220 and the exposure that are electrically connected to the outside and is arranged on a part first lead terminal 1300 of a side in first hole 1240 of opposite side.First hole 1240 can have the area littler than first lead terminal 1300, shown in Fig. 2 A, and can have stage portion A, to hold first lead terminal 1300, shown in Fig. 2 B.
And, be different from Fig. 2 A, the stage portion A in first hole 1240 can form and make that only some first lead terminal 1300 inserts, and in this case, this part first lead terminal 1300 can be to 1240 bendings of first hole, so that be inserted in first hole 1240.
And, being different from Fig. 2 A, first lead terminal 1300 can have the area littler than electrode terminal 1132.
In addition; not shown; in order to prevent plain battery 1100 overvoltage or overcurrent; at least one protection device that is installed on the protective circuit plate 1200 is set on the same side of first lead terminal 1300; thereby the battery pack of first exemplary embodiment can reduce on thickness according to the present invention, perhaps compares than the conventional batteries with same size to have higher capacity.
First lead terminal 1300 is electrically connected between plain battery 1100 and the protective circuit plate 1200; wherein; electrical connection can by first lead terminal 1300 is welded on the protective circuit plate 1200, near first hole 1240 or inboard realizations, perhaps by realizing on the electrode terminal 1132 that first hole 1240 of first lead terminal 1300 by protective circuit plate 1200 is welded to plain battery 1100.First lead terminal 1300 and electrode terminal 1132 can be formed by identical materials, so that welding perhaps has the part of plating to improve conductivity in first lead terminal 1300 and electrode terminal 1132 contacted zones.But, consider weldability and conductivity, first lead terminal 1300 and electrode terminal 1132 are preferably formed by nickel.
First lead terminal 1300 can be electrically connected on protective circuit plate 1200 or the electrode terminal 1132 by soldering.In this case; shown in Fig. 2 C; first lead terminal 1300 comprises at least one second hole 1320; this second hole 1320 is arranged on the inboard in first hole 1240; and the space between first and second holes 1240 and 1320 can be filled with lead, realizes the electrical connection between electrode terminal 1132, first lead terminal 1300 and the protective circuit plate 1200 thus simultaneously.
With reference to Fig. 1,2A and 2B; the method of the manufacturing battery pack of first exemplary embodiment according to the present invention; this first hole 1240, opposite side place that first lead terminal 1300 is arranged in the protective circuit plate 1200 with first hole 1240 is exposed to a side of described protective circuit plate 1200, and first lead terminal 1300 and protective circuit plate 1200 are near first hole 1240 or inboard being electrically connected to each other.The protective circuit plate 1200 and first lead terminal 1300 can be electrically connected by soldering or welding; and consider the influence that is installed at least one protection device on the protective circuit plate 1200 and the bond strength between the protective circuit plate 1200 and first lead terminal 1300, preferably pass through electric resistance welding.
And; in order to improve bond strength and the electrical connection between the protective circuit plate 1200 and first lead terminal 1300; first lead terminal 1300 can local or partly be inserted in first hole 1240; in this case; stage portion A can be formed on the inboard in first hole 1240, to hold all or part of first lead terminal 1300.
Subsequently, for first lead terminal 1300 being set on the electrode terminal 1132 of plain battery 1100, arrange plain battery 1100 and protective circuit plate 1200.Second protection device can be between the electrode terminal 1132 and first lead terminal 1300 of plain battery 1100 as positive temperature coefficient (PTC) device (not shown).Yet because the electrode terminal 1132 and first lead terminal 1300 can weld or soldering in process subsequently, the PTC device can be installed on the protective circuit plate 1200.
Then, the electrode terminal 1132 and first lead terminal 1300 are welded or soldered to together by first hole 1240, are electrically connected plain battery 1100 and protective circuit plate 1200 thus.The electrode terminal 1132 and first lead terminal 1300 can be electrically connected to each other by welding or soldering; and consider being installed at least one protection device and the influence of the electrode assemblie 1110 in the plain battery 1100 and the bond strength between protective circuit plate 1200 and the plain battery 1100 on the protective circuit plate 1200, preferably adopt electric resistance welding.
And; in order to improve conductivity and the bond strength between the electrode terminal 1132 and first lead terminal 1300; protective circuit plate 1200 can have some first holes 1240 and electroplate part, so that improve the conductivity in first lead terminal 1300 and the electrode terminal 1132 contacted zones.
The result; in the battery pack of first exemplary embodiment according to the present invention; first lead terminal that is electrically connected on the protective circuit plate can be arranged on the electrode terminal of plain battery; and first lead terminal and electrode terminal are electrically connected to each other by the hole that the part exposes the protective circuit plate of first lead terminal; make space minimum between plain battery and the protective circuit plate thus; and a part of first lead terminal can be inserted in the hole of protective circuit plate, has improved the bond strength between plain battery and the protective circuit plate thus.
Fig. 3 A is the decomposition diagram of the battery pack of second exemplary embodiment according to the present invention, and Fig. 3 B is the cross-sectional view of the battery pack of second exemplary embodiment according to the present invention.
With reference to Fig. 3 A and 3B, the battery pack of second exemplary embodiment comprises according to the present invention: plain battery 1100; Be arranged on first lead terminal 1300 on the electrode terminal of plain battery 1100; Protective circuit plate 1200, this protective circuit plate 1200 is electrically connected on the plain battery 1100 by first lead terminal 1300, and has first hole 1240 corresponding to the part of first lead terminal 1300; And second lead terminal 1400; this second lead terminal is electrically connected to protective circuit plate 1200 on the cover plate 1131; on described cover plate 1131 is electrically connected to not with electrode terminal 1132 is electrically connected the positive electrode plate or negative electrode plate, and electrode terminal 1131 is electrically connected on the plain battery 1100.
Those of plain battery 1100, first lead terminal 1300 and protective circuit plate 1200 and first exemplary embodiment according to the present invention have identical construction, no longer describe below.
Second lead terminal 1400 is arranged on the one or both sides of protective circuit plate 1200 in the face of the Width of plain battery 1100; move relative to the electrode terminal 1132 of plain battery 1100 so that prevent protective circuit plate 1200, and the bond strength between raising plain battery 1100 and the protective circuit plate 1200.
Second lead terminal 1400 is divided into the first area 1410 of cover plate 1131 contact, with the second area 1420 of protective circuit plate 1200 contacts and is connected first area 1410 and the 3rd zone 1430 of second area 1420, and each regional bending is so that be connected to cover plate 1131 on the protective circuit plate 1200.Thus, this zone has can not increase the cover plate 1131 that electrode terminal 1132 and first lead terminal 1300 brought and the structure in the space between the protective circuit plate 1200.
First and second zones 1410 and 1420 of second lead terminal 1400 can be welded or soldered to respectively on cover plate 1131 and the protective circuit plate 1200; but; consider electrical connection and bond strength between plain battery 1100 and the protective circuit plate 1200; second lead terminal 1400 preferably is welded on cover plate 1131 and the protective circuit plate 1200; preferred; consider conductivity, form by nickel material.
Fig. 3 A and 3B illustrate second lead terminal 1400 and are arranged on the both sides of protective circuit plate 1200 Widths, and still, second lead terminal 1400 can be arranged on the side of protective circuit plate 1200.In this case, have with the identical shaped first Connection Element (not shown) of second lead terminal 1400 and be arranged on the opposite side of protective circuit plate 1200, can improve the bond strength between protective circuit plate 1200 and the plain battery 1100 thus.
In Fig. 3 A and 3B, the area of protective circuit plate 1200 is less than cover plate 1131, and is identical but its area can be with cover plate 1131.
The result; in the battery pack of second exemplary embodiment according to the present invention; first polarity between plain battery and the protective circuit plate by being arranged on plain battery electrode terminal and first lead terminal between the protective circuit plate and first hole that is formed on the protective circuit plate be electrically connected, between plain battery and the protective circuit plate with first opposite polarity second polarity by the cover plate of plain battery is directly connected on the protective circuit plate and is electrically connected through being arranged on second lead terminal on the plain battery Width one or both sides.
Fig. 4 is the decomposition diagram of the battery pack of the 3rd exemplary embodiment according to the present invention.
With reference to Fig. 4, the battery pack of the 3rd exemplary embodiment comprises according to the present invention: plain battery 1100; Be arranged on first lead terminal 1300 on the electrode assemblie of plain battery 1100; Be electrically connected to protective circuit plate 1200 on the plain battery 1100 by first lead terminal 1300, this circuit board has and corresponding first hole 1240 of the part of first lead terminal 1300; Second lead terminal 1400, this second splicing ear 1400 is electrically connected cover plate 1131 with protective circuit plate 1200, on this cover plate 1131 is electrically connected to not with electrode terminal 1132 is electrically connected the positive electrode plate or negative electrode plate, and electrode terminal 1132 is electrically connected on the plain battery 1100; Support component 1600, this support component 1600 place between plain battery 1100 and the protective circuit plate 1200, improving the bond strength between plain battery 1100 and the protective circuit plate 1200, and act as and lay protective circuit plate 1200; And loam cake 1500, this loam cake 1500 is around protective circuit plate 1200.
Plain battery 1100, first lead terminal 1300, second lead terminal 1400 and protective circuit plate 1200 have with the present invention's first exemplary embodiment in those identical construction, so, these elements are no longer described below.
Support component 1600 act as to be laid and the protective circuit plate 1200 of support and connection to the plain battery 1100, thereby further strengthens the bond strength between plain battery 1100 and the protective circuit plate 1200.Support component 1600 can form around plain battery 1100, being supported on the space between plain battery 1100 and the protective circuit plate 1200, and can be hollow, is beneficial to the electrical connection between plain battery 1100 and the protective circuit plate 1200.
Support component 1600 can have sidepiece backstop 1620 and at least one end stop 1660; described sidepiece backstop is inwardly given prominence at least one surface from it; to lay the protective circuit plate; and described end stop 1660 is connected between the long side surface of described support component 1600, to prevent support component 1600 modification.
Loam cake 1500 is around protective circuit plate 1200, to prevent to be formed on protection device on the protective circuit plate 1200 owing to external force is out of shape.Loam cake 1500 can have the external terminal 1220 corresponding external terminal holes 1520 with protective circuit plate 1200, makes protective circuit plate 1200 to be electrically connected with the external world.
The result; the battery pack of the 3rd exemplary embodiment also comprises support component that is arranged between plain battery and the protective circuit plate and the loam cake that centers on the protective circuit plate according to the present invention; thus; bond strength between plain battery and the protective circuit plate can further be strengthened, and can prevent that plain battery and protective circuit plate are owing to external force moves.
Fig. 5 is the decomposition diagram of the battery pack of the 4th exemplary embodiment according to the present invention, and Fig. 6 A and 6B are the cross-sectional views of the shape in the hole that forms in the protective circuit plate according to the battery pack of fourth embodiment of the invention.
With reference to Fig. 5,6A and 6B, the battery pack of the 4th exemplary embodiment comprises according to the present invention: plain battery 1100; Be arranged on the protective circuit plate 2200 on the plain battery 1100, this protective circuit plate 1200 has the 3rd hole 2240, and the electrode terminal 1132 of plain battery 1100 can be inserted in the 3rd hole 2240; And the 3rd lead terminal 2300, the three lead terminals 2300 are arranged on protective circuit plate 2200 and the electrode terminal 1132.Plain battery 1100 have with the battery pack of first exemplary embodiment according to the present invention in the plain battery identical construction, therefore no longer describe below.
Protective circuit plate 2200 has: external terminal 2220 is to be electrically connected to the external world; And 2240, the three holes 2240, the 3rd hole expose the part of the 3rd lead terminal that is arranged on a side in opposite side.The 3rd hole 2240 as shown in Figure 6A, has the area littler than the 3rd lead terminal 2300, and can comprise stage portion B, to hold the 3rd lead terminal 2300, shown in Fig. 6 B.
In addition, the stage portion B in the 3rd hole 2240 can form an only part the 3rd lead terminal 2300 insertions, and in this case, this part the 3rd lead terminal 2300 can be crooked on the direction in the 3rd hole 2240, to be inserted in the 3rd hole 2240.
In addition; not shown in the drawings; in order to prevent plain battery 1100 overvoltage and overcurrent; being installed at least one protection device on the protective circuit plate 2200 can be arranged on the identical side of the 3rd lead terminal 2300; and the electrode terminal 1132 of plain battery 1100 can be inserted in the 3rd hole 2240; further strengthen the plain battery 1100 of the battery pack of the 4th exemplary embodiment and the bond strength between the protective circuit plate 2200 thus according to the present invention, and reduce its whole thickness or with the conventional batteries of same size mutually specific capacity increase.
For unnecessary electrical connection between the cover plate 1131 that prevents protective circuit plate 2200 and plain battery 1100, shown in Fig. 6 A and 6B, between the cover plate 1131 of protective circuit plate 2200 and plain battery 1100, insulating tape 2140 is set.Shown in Fig. 6 C, formed and be arranged on both sides on plain battery 1100 Widths and around second Connection Element 2400 of the side of protective circuit plate 2200.One of them second Connection Element 2400 has conductivity, be electrically connected on the protective circuit plate 2200 with the electrode terminal 1132 with plain battery 1100, and as lead terminal, its polarity is opposite with electrode terminal 1132 and the 3rd lead terminal 2300.
The electrode terminal 1132 of the plain battery 1100 in will being inserted into the 3rd hole 2240 is welded in the process on the 3rd lead terminal 2300; the 3rd lead terminal 2300 and protective circuit plate 2200 can be around 2240 welding of the 3rd hole; thus plain battery 1100 is electrically connected on the protective circuit plate 2200, this battery pack with first exemplary embodiment according to the present invention is compared and can be reduced the processing time.For the ease of the welding between the 3rd lead terminal 2300 and the electrode terminal 1132, the 3rd lead terminal 2300 and electrode terminal 1132 can be formed by same material, maybe can have the plating part, be used for improving be connected with electrode terminal 1132 conductivity in the zone of the 3rd lead terminal 2300.Preferably, consider weldability and conductivity, the 3rd lead terminal 2300 and electrode terminal 1132 are formed by nickel material.
The 3rd lead terminal 2300 can be electrically connected on protective circuit plate 2200 or the electrode terminal 1132 by soldering.In this case; the 3rd lead terminal 2300 comprises at least one the 4th hole (not shown); the 4th hole is arranged on the inboard in the 3rd hole 2240; and first and second holes are filled with lead; thereby electrode terminal 1132, the 3rd lead terminal 2300 and protective circuit plate 2200 can be electrically connected to each other simultaneously.
The result; in the battery pack of the 4th exemplary embodiment according to the present invention; the electrode terminal of plain battery is inserted in the hole that forms in the protective circuit plate; and electrode terminal be electrically connected to be provided with on the protective circuit plate and the 3rd lead terminal corresponding to the hole in the protective circuit plate on; thereby the space between plain battery and the protective circuit plate can be minimum, and the bond strength between plain battery and the protective circuit plate can improve.
Fig. 7 is the decomposition diagram of the battery pack of the 5th exemplary embodiment according to the present invention.
With reference to Fig. 7, comprise according to the battery pack of fifth embodiment of the invention: plain battery 3100, this plain battery have electrode terminal 3132 and cover plate 3131, and cover plate 3131 has projection 3137 in the one side; Protective circuit plate 3200, this protective circuit plate 3200 are arranged on the plain battery 3100 and have the 5th hole 3240 and groove 3260, and the electrode terminal 3132 of plain battery 3100 is inserted in the 5th hole 3240, and described groove 3260 is corresponding with described projection 3137; And the 4th lead terminal 3300, the four lead terminals 3300 are arranged on protective circuit plate 3200 and the electrode terminal 3232.Plain battery 3100 except cover plate 3131, have with the battery pack of first exemplary embodiment according to the present invention in the plain battery identical construction, no longer describe below.
Though the protective circuit plate has and the closely similar structure of above-mentioned protective circuit plate 2200 according to fourth embodiment of the invention; but form groove 3260 in protective circuit plate 3200, this groove 3260 is corresponding with the projection 3137 on cover plate 3,131 one sides that are formed on plain battery 3100.In Fig. 7, though projection 3137 and groove 3260 be respectively formed on the side of plain battery 3100 and protective circuit plate 3200, projection 3137 and groove 3260 can be formed on the both sides of Width or its one or both sides on vertically on.Protective circuit plate 3200 can have and projection 3137 corresponding holes, but not groove 3260.
And; not shown in the drawings; the battery pack of the 5th exemplary embodiment can also comprise the 5th lead terminal (not shown) according to the present invention; the 5th lead terminal is arranged on a side of protective circuit plate 3200; and being exposed to opposite side by groove 3260 parts, the 5th lead terminal can be by forming with above-mentioned first to the 4th lead terminal identical materials.
The 4th lead terminal 3300 has and above-mentioned the 3rd lead terminal identical construction in the 4th exemplary embodiment, no longer description below according to the present invention.In Fig. 7, in the battery pack of the 5th exemplary embodiment according to the present invention, the electrode terminal 3132 of plain battery 3100 is inserted in the 5th hole 3240 of protective circuit plate 3200, and the 4th lead terminal 3300 is arranged on the protective circuit plate 3200.But the 4th lead terminal 3300 can be arranged between protective circuit plate 3200 and the plain battery 3100, as in the battery pack of first exemplary embodiment according to the present invention.
The result; in the battery pack of the 5th exemplary embodiment according to the present invention; on the one or both sides of the Width of the cover plate of plain battery, form projection; and hole or groove corresponding to projection are formed in the protective circuit plate; so that utilize the electrode terminal of lead terminal and plain battery that plain battery is connected on the protective circuit plate; and thus, between plain battery and protective circuit plate, be electrically connected with first opposite polarity second polarity on being electrically connected to the protective circuit plate.Thereby the space between plain battery and the protective circuit plate can be minimum, and can further improve the bond strength between plain battery and the protective circuit plate.
So; battery pack according to the present invention is by being electrically connected via the hole that is formed on protective circuit plate one side electrode terminal with first lead terminal that is electrically connected to the protective circuit plate, can independent element make that space between plain battery and the protective circuit plate is minimum and improve bond strength between them.
By the protective circuit plate being utilized second lead terminal be electrically connected on the cover plate or jar of plain battery, bond strength between plain battery and the protective circuit plate can be able to further raising, wherein, described second lead terminal has the polarity opposite with electrode terminal with first lead terminal; Perhaps by utilizing second lead terminal that the protective circuit plate is electrically connected on the side of the plain battery in the local insertion protective circuit plate, the bond strength between plain battery and the protective circuit plate can be able to further raising.
Though described the present invention with reference to specific embodiment of the present invention, it will be appreciated by those skilled in the art that under the prerequisite of marrow of the present invention that does not deviate from the claims qualification and scope, can make various modifications and variations in the present invention.

Claims (25)

1. the protective circuit plate of a battery pack comprises:
Be arranged in first lead terminal on first side of this protective circuit plate; And
First hole in this protective circuit plate, described first hole is exposed to described first lead terminal on second side of described protective circuit plate.
2. protective circuit plate as claimed in claim 1, wherein, the described first lead terminal part is in described first hole.
3. protective circuit plate as claimed in claim 1, wherein, the described first lead terminal local buckling is in described first hole.
4. protective circuit plate as claimed in claim 1, wherein, described first hole has stage portion, to hold to described first lead terminal of small part.
5. protective circuit plate as claimed in claim 1, wherein, described first lead terminal with corresponding zone, described first hole in comprise at least one second hole.
6. protective circuit plate as claimed in claim 1 also comprises at least one protection device, and this protection device is installed on first side of described protective circuit plate.
7. battery pack comprises:
Plain battery, this plain battery comprises electrode terminal;
Second lead terminal, this second lead terminal is arranged on the described electrode terminal; And
The protective circuit plate; this protective circuit plate is electrically connected on described second lead terminal and the plain battery; described protective circuit plate comprises first hole, and second lead terminal that this first hole will be arranged on first side of described protective circuit plate is exposed on second side of described protective circuit plate.
8. battery pack as claimed in claim 7, wherein, the described second lead terminal part is in described first hole.
9. battery pack as claimed in claim 7, wherein, the described second lead terminal local buckling is in described first hole.
10. battery pack as claimed in claim 7, wherein, described first hole has stage portion, to hold to described second lead terminal of small part.
11. battery pack as claimed in claim 7, wherein, described second lead-in wire has at least one second hole in the zone corresponding to described first hole.
12. battery pack as claimed in claim 7, wherein, described protective circuit plate has at least one protection device, and this protection device is installed on first side of described protective circuit plate.
13. battery pack as claimed in claim 7, wherein, described second lead terminal is arranged between described plain battery and the described protective circuit plate.
14. battery pack as claimed in claim 7, wherein, the electrode terminal of described plain battery is in described first hole.
15. battery pack as claimed in claim 7 also comprises:
First jockey, this first jockey be arranged in described protective circuit plate at least one side on the Width of this protective circuit plate, and described plain battery is connected with described protective circuit plate.
16. battery pack as claimed in claim 15, wherein, described first jockey conducts electricity.
17. battery pack as claimed in claim 7; wherein; on at least one side of the above cover plate of Width of the cover plate of described plain battery, be furnished with at least one projection, and in described protective circuit plate, be furnished with and described at least one projection corresponding at least one the 3rd hole or groove.
18. battery pack as claimed in claim 17 also comprises:
The 4th lead terminal, the 4th lead terminal are arranged on the projection of plain battery, by the 3rd hole in this protective circuit plate or groove plain battery is electrically connected on the described protective circuit plate.
19. battery pack as claimed in claim 7, wherein, described second lead terminal contacts with described electrode terminal, and described second lead terminal comprises the plating contact area, to improve conductivity.
20. battery pack as claimed in claim 7 also comprises:
Support component, this support component are arranged between described plain battery and the described protective circuit plate, to lay described protective circuit plate.
21. battery pack as claimed in claim 7 also comprises:
Loam cake, this loam cake has at least one the 4th hole around described protective circuit plate, and this at least one the 4th hole is corresponding to the external terminal of described protective circuit plate.
22. a method of making battery pack, this method comprises:
Formation has the plain battery of electrode terminal and has the protective circuit plate in first hole;
First lead terminal is arranged on first side of described protective circuit plate, this first lead terminal is exposed on second side of described protective circuit plate by described first hole is local at least;
Described first lead terminal is electrically connected on the described protective circuit plate;
Described plain battery and protective circuit plate are arranged such that described first lead terminal is arranged on the described electrode terminal; And
Described first lead terminal is electrically connected with described electrode terminal by described first hole.
23. method as claimed in claim 22, wherein, described first lead terminal is electrically connected to described electrode terminal by electric resistance welding.
24. method as claimed in claim 22 also comprises:
Arrange at least one second hole in described first lead terminal, this second hole is exposed to second side of described protective circuit plate by described first hole; And
After arranging described plain battery and protective circuit plate,, first lead terminal is electrically connected with electrode terminal by first hole and second hole.
25. method as claimed in claim 24, wherein, described first lead terminal is electrically connected on electrode terminal and the protective circuit plate simultaneously by first hole and second hole.
CN2008102129628A 2007-09-10 2008-09-10 Protection circuit board, battery pack and method of fabricating the protection circuit board Expired - Fee Related CN101389185B (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
KR91821/07 2007-09-10
KR1020070091821A KR101308325B1 (en) 2007-09-10 2007-09-10 Secondary battery
KR1020070096180A KR101384930B1 (en) 2007-09-20 2007-09-20 Protection circuit module and secondary battery using the same
KR96180/07 2007-09-20
KR102469/07 2007-10-11
KR1020070102469A KR100951905B1 (en) 2007-10-11 2007-10-11 Battery pack and Fabrication method for the same

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KR101084794B1 (en) 2009-11-19 2011-11-21 삼성에스디아이 주식회사 Secondary Battery
US8343653B2 (en) 2009-11-30 2013-01-01 Samsung Sdi Co., Ltd. Secondary battery
CN109994660B (en) * 2019-03-15 2023-12-05 福建南平南孚电池有限公司 Rechargeable battery with improved circuit unit

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JP3696097B2 (en) 2001-01-30 2005-09-14 三洋電機株式会社 Pack battery and manufacturing method thereof
KR100542677B1 (en) 2004-06-25 2006-01-11 삼성에스디아이 주식회사 Secondary Battery
KR100543779B1 (en) 2004-07-21 2006-01-23 주식회사 한림포스텍 Inner battery pack applied radio frequency identification technology and portable device equipped with it

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US11355825B2 (en) 2017-05-29 2022-06-07 Lg Energy Solution, Ltd. Battery pack and manufacturing method therefor
CN112133876A (en) * 2020-08-31 2020-12-25 东莞新能德科技有限公司 Battery and terminal equipment

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KR101308325B1 (en) 2013-09-17
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