CN107910488B - Series connection spare, battery and group battery - Google Patents

Series connection spare, battery and group battery Download PDF

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Publication number
CN107910488B
CN107910488B CN201711095024.XA CN201711095024A CN107910488B CN 107910488 B CN107910488 B CN 107910488B CN 201711095024 A CN201711095024 A CN 201711095024A CN 107910488 B CN107910488 B CN 107910488B
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CN
China
Prior art keywords
series
battery
fuse
electrically connected
connection
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.)
Active
Application number
CN201711095024.XA
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Chinese (zh)
Other versions
CN107910488A (en
Inventor
熊会元
谭志荣
洪佳鹏
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.)
Institute of Dongguan of Sun Yat Sen University
National Sun Yat Sen University
Original Assignee
Institute of Dongguan of Sun Yat Sen University
National Sun Yat Sen University
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.)
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Publication date
Application filed by Institute of Dongguan of Sun Yat Sen University, National Sun Yat Sen University filed Critical Institute of Dongguan of Sun Yat Sen University
Priority to CN201711095024.XA priority Critical patent/CN107910488B/en
Publication of CN107910488A publication Critical patent/CN107910488A/en
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Publication of CN107910488B publication Critical patent/CN107910488B/en
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
    • H01M50/597—Protection against reversal of polarity
    • 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
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/574—Devices or arrangements for the interruption of current
    • H01M50/578—Devices or arrangements for the interruption of current in response to pressure
    • 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
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/574—Devices or arrangements for the interruption of current
    • H01M50/581—Devices or arrangements for the interruption of current in response to temperature
    • 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
    • H01M2200/10—Temperature sensitive devices
    • H01M2200/103—Fuse
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/10—Batteries in stationary systems, e.g. emergency power source in plant
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • 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

the invention discloses a series connection piece, comprising: the battery pack comprises a PCB, a fuse, a first series part and a second series part, wherein the first series part is used for being electrically connected with a first battery; the first series part and the second series part are respectively arranged on the top surface and the bottom surface of the PCB; the PCB is provided with a through hole; the first series portion is electrically connected to a first end of the fuse, and a second end of the fuse is electrically connected to the second series portion through the penetration hole. Through the structure, the fuse can be fused to disconnect the electric connection relation of the battery when the battery fails, so that the phenomenon that the performance of the whole power battery pack is influenced by the failed battery and even accidents are caused is avoided, and the safety is guaranteed. Meanwhile, the invention also provides a battery and a battery pack.

Description

Series connection spare, battery and group battery
Technical Field
The invention relates to the technical field of batteries, in particular to a series connection piece, a battery and a battery pack.
Background
In recent years, with the increasing awareness of environmental protection and the rapid development of electric vehicles and energy storage power stations, the number of power battery packs with various requirements has increased rapidly, and batteries and battery packs have become core components of electric vehicles and energy storage power stations.
The power battery pack is a development trend of the power battery system based on the mature single batteries with higher reliability, and a plurality of single batteries are often required to be connected in series to meet certain voltage requirements.
Disclosure of Invention
The technical problem to be solved by the embodiment of the invention is to provide a series connection piece, a battery and a battery pack, wherein the connection piece with a fuse is arranged at the end part of the battery, so that the electric connection relation of a fault battery can be disconnected when the battery has a fault, the phenomenon that the fault battery influences the performance of the whole power battery pack and even causes an accident is avoided, and the safety is ensured.
In order to achieve the above object, a first aspect of an embodiment of the present invention provides a series connection, including: the battery pack comprises a PCB, a fuse, a first series part and a second series part, wherein the first series part is used for being electrically connected with a first battery;
The first series part and the second series part are respectively arranged on the top surface and the bottom surface of the PCB;
The PCB is provided with a through hole; the first series portion is electrically connected to a first end of the fuse, and a second end of the fuse is electrically connected to the second series portion through the penetration hole.
In an alternative embodiment, the first series portion is a screw connection member disposed at a central position of a top surface of the PCB board. The first series connection part is electrically connected with the first battery in a threaded connection mode, so that the series connection connecting piece and the first battery are detachably connected, and assembly is facilitated.
In an alternative embodiment, the threaded connection is a metal nut.
In an alternative embodiment, the through hole is a plurality of through holes, the plurality of through holes are uniformly arranged on the PCB in the area corresponding to the second series part, and the plurality of through holes are used for soldering the second series part to the second battery; the second end of the fuse is electrically connected with the second series part through the through hole, and specifically: the second end of the fuse is electrically connected to the second series portion through one of the perforations. And providing stable and reliable electric connection between the series connection piece and the second battery by welding.
In an alternative embodiment, the inner wall of the plurality of through holes is provided with a conductive layer, and the electrical connection between the second end of the fuse and the second series portion through one of the through holes is specifically: the second end of the fuse is electrically connected to the second series portion through the conductive layer of the inner wall of one of the through holes.
In an optional embodiment, the second series portion is a metal ring, and a center of the metal ring coincides with a center of the bottom surface of the PCB.
in an alternative embodiment, the outer radius of the metal ring is less than or equal to the radius of the second cell. The metal ring is located in the range of the connecting end face of the second battery, so that materials are saved while electric connection with the second battery is guaranteed.
In an alternative embodiment, the fuse is a patch fuse. The patch type fuse has strong shock resistance and high reliability.
A second aspect of an embodiment of the present invention provides a battery, including a battery body and the series connection member as described above; and one polar end part of the battery body is provided with a connecting terminal matched with the first series part, and the other polar end part of the battery body is electrically connected with the second series part.
a third aspect of an embodiment of the present invention provides a battery pack, including a plurality of batteries as described above; a number of the cells are connected in series.
Compared with the prior art, the embodiment of the invention has the beneficial effects that: the embodiment of the invention provides a series connection piece, a battery and a battery pack, wherein the series connection piece comprises: the battery pack comprises a PCB, a fuse, a first series part and a second series part, wherein the first series part is used for being electrically connected with a first battery; the first series part and the second series part are respectively arranged on the top surface and the bottom surface of the PCB; the PCB is provided with a through hole; the first series portion is electrically connected to a first end of the fuse, and a second end of the fuse is electrically connected to the second series portion through the penetration hole. Through the structure, the fuse is arranged between the first series part and the second series part, so that effective protection is provided for each battery, when the battery has overvoltage, overcurrent, overheating or short-circuit faults, the fuse is fused, the first series part is disconnected from the second series part, the electric connection relation between the faulty battery and peripheral batteries is timely disconnected, the safety of the power battery pack is improved, the situation that the faulty battery affects the performance of the whole power battery pack and even causes accidents is avoided, and the personal safety of passengers is guaranteed.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is an elevation view of a tandem connection provided by an embodiment of the present invention;
FIG. 2 is a rear view of a series connection provided by an embodiment of the present invention;
FIG. 3 is a schematic diagram of a series connection provided by an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a battery provided in an embodiment of the present invention;
Fig. 5 is a schematic structural diagram of a battery pack according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 2 and fig. 3, wherein fig. 1 is a front view of a series connection element 100 according to an embodiment of the present invention, fig. 2 is a rear view of the series connection element 100 according to the embodiment of the present invention, and fig. 3 is a schematic structural diagram of the series connection element 100 according to the embodiment of the present invention. A first aspect of the embodiments of the present invention provides a series connection element 100, including: a PCB board 101, a fuse 102, a first series portion 103 for electrically connecting with a first battery, and a second series portion 104 for electrically connecting with a second battery;
The first series part 103 and the second series part 104 are respectively arranged on the top surface and the bottom surface of the PCB 101;
A through hole 105 is formed in the PCB 101; the first series portion 103 is electrically connected to a first end of the fuse 102, and a second end of the fuse 102 is electrically connected to the second series portion 104 through the through hole 105.
The working principle of the embodiment of the invention is as follows:
The first series connection part 103 is electrically connected to the second series connection part 104 through the fuse 102, and constitutes an electrical connection relationship of the series connection member itself; when the first battery and the second battery are connected to the first series portion 103 and the second series portion 104, respectively, the first battery and the second battery are in a series electrical connection relationship by the series connection connector. When the first battery and the second battery work normally, the current value flowing through the fuse 102 is smaller than the fusing current value of the fuse 102, and two ends of the fuse 102 are electrically connected, so that the first series connection part 103 and the second series connection part 104 are electrically connected, and further the first battery and the second battery are electrically connected, and the first battery and the second battery are connected in series; when the first battery or the second battery has overvoltage, overcurrent, overheat or short-circuit faults, the current value flowing through the fuse 102 reaches the fusing current value of the fuse 102, the fuse 102 fuses, the electrical connection of the two ends of the fuse 102 is broken, namely, the electrical connection of the first series connection part 103 and the second series connection part 104 is broken, the electrical connection of the first battery and the second battery is broken, namely, the fault battery is isolated, the peripheral battery electrically connected with the fault battery is protected, and the peripheral battery fault and the power battery pack fault are avoided.
In the embodiment of the present invention, the first series part 103 and the second series part 104 are respectively disposed on the top surface and the bottom surface of the PCB 101, and are electrically connected through the fuse 102, so that the first series part 103 can be electrically connected to the second series part 104 only through the fuse 102, which effectively ensures that when the fuse 102 is fused, the first series part 103 and the second series part 104 do not have an electrical connection relationship any more.
In an optional implementation manner, the PCB 101 is made of an epoxy resin material with high flame retardant grade and high melting point, so that the PCB 101 is effectively prevented from melting due to overheating, and the safety is improved.
In an alternative embodiment, the first series portion 103 is a screw connection member disposed at a central position of the top surface of the PCB board. The first series connection part 103 is electrically connected with the first battery by means of screw connection, so that the connection between the series connection member 100 and the first battery is detachable, and the assembly is facilitated.
in an alternative embodiment, the threaded connection is a metal nut.
In an alternative embodiment, the through hole 105 is a plurality of through holes 105, the plurality of through holes 105 are uniformly arranged on the PCB 101 in an area corresponding to the second series part 104, and the plurality of through holes 105 are used for soldering the second series part 104 to the second battery; the second end of the fuse 102 is electrically connected to the second series portion 104 through the through hole 105, specifically: the second end of the fuse 102 is electrically connected to the second series connection 104 through one of the through holes 105. A stable and reliable electrical connection is provided between the series connection member 100 and the second battery by means of welding.
In an alternative embodiment, the inner wall of the through holes 105 is provided with a conductive layer, and the second end of the fuse 102 is electrically connected to the second series part 104 through one of the through holes 105 specifically: the second end of the fuse 102 is electrically connected to the second series portion 104 through a conductive layer of an inner wall of one of the through holes 105.
Preferably, the number of the perforations 105 is 4.
Preferably, the material of the second series portion 104 is nickel. Nickel is a commonly used spot welding material, and the second series portion 104 is welded to the second battery by spot welding, so that the operation is simple and the electric conductivity is good.
In an alternative embodiment, the second serial portion 104 is a metal ring, and the center of the metal ring coincides with the center of the bottom surface of the PCB 101.
In an alternative embodiment, the outer radius of the metal ring is less than or equal to the radius of the second cell. The metal ring is located in the range of the connecting end face of the second battery, so that materials are saved while electric connection with the second battery is guaranteed.
In an alternative embodiment, the fuse 102 is a patch fuse. The patch type fuse has strong shock resistance and high reliability.
In an alternative embodiment, a solder layer 106 is disposed on the top surface of the PCB 101, the first series portion 103 is disposed on the solder layer 106, and the electrically connecting the first series portion 103 and the first end of the fuse 102 is specifically: the first series portion 103 is electrically connected to a first end of the fuse 102 through the solder layer 106.
Preferably, the material of the solder layer 106 is tin.
A second aspect of an embodiment of the present invention provides a battery. Please refer to fig. 4, which is a schematic structural diagram of a battery 200 according to an embodiment of the present invention. The battery 200 includes the battery body 201 and the series connection member 100 as described above; one polar end of the battery body 201 is provided with a connection terminal 202 that is engaged with the first series portion 103, and the other polar end of the battery body 201 is electrically connected to the second series portion 104.
in an alternative embodiment, the positive electrode of the battery body 201 is provided with a connection terminal 202 matched with the first series connection part 103, and the negative electrode of the battery body 201 is electrically connected with the second series connection part 104.
A third aspect of embodiments of the present invention provides a battery pack. Please refer to fig. 5, which is a schematic structural diagram of a battery pack according to an embodiment of the present invention. The battery pack includes a plurality of the batteries 200 as described above; several of the batteries 200 are connected in series.
it is understood that a plurality of the batteries 200 are connected in series by means of the connection terminals 202 cooperating with the first series portion 103 of the series connection member 100.
Compared with the prior art, the embodiment of the invention has the beneficial effects that: the embodiment of the invention provides a series connection piece, a battery and a battery pack, wherein the series connection piece comprises: the battery pack comprises a PCB, a fuse, a first series part and a second series part, wherein the first series part is used for being electrically connected with a first battery; the first series part and the second series part are respectively arranged on the top surface and the bottom surface of the PCB; the PCB is provided with a through hole; the first series portion is electrically connected to a first end of the fuse, and a second end of the fuse is electrically connected to the second series portion through the penetration hole. Through the structure, the fuse is arranged between the first series part and the second series part, so that effective protection is provided for each battery, when the battery has overvoltage, overcurrent, overheating or short-circuit faults, the fuse is fused, the first series part is disconnected from the second series part, the electric connection relation between the faulty battery and peripheral batteries is timely disconnected, the safety of the power battery pack is improved, the situation that the faulty battery affects the performance of the whole power battery pack and even causes accidents is avoided, and the personal safety of passengers is guaranteed.
while the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.

Claims (10)

1. A series connection, comprising: the battery pack comprises a PCB, a fuse, a first series part and a second series part, wherein the first series part is used for being electrically connected with a first battery;
The first series part and the second series part are respectively arranged on the top surface and the bottom surface of the PCB;
The PCB is provided with a through hole, and the second series part is welded with the second battery through the through hole; the first series portion is electrically connected to a first end of the fuse, and a second end of the fuse is electrically connected to the second series portion through the penetration hole.
2. The series connection of claim 1, wherein the first series portion is a screw connection member disposed at a central position of a top surface of the PCB board.
3. the series connection of claim 2, wherein the threaded connection is a metal nut.
4. The series connection of claim 1, wherein the perforation is a plurality of perforations uniformly arranged on the PCB board in a region corresponding to the second series portion; the second end of the fuse is electrically connected with the second series part through the through hole, and specifically: the second end of the fuse is electrically connected to the second series portion through one of the perforations.
5. the series connection of claim 4, wherein the inner walls of the plurality of perforations are provided with a conductive layer, and wherein the electrical connection of the second end of the fuse to the second series portion through one of the perforations is embodied as: the second end of the fuse is electrically connected to the second series portion through the conductive layer of the inner wall of one of the through holes.
6. the series connection of claim 4 or 5, wherein the second series portion is a metal ring having a center coinciding with a center of the bottom surface of the PCB board.
7. The series connection of claim 6, wherein the outer radius of the metal toroid is less than or equal to the radius of the second cell.
8. The series connection of claim 1, wherein the fuse is a patch fuse.
9. A battery comprising a battery body and the series connection member according to any one of claims 1 to 8; and one polar end part of the battery body is provided with a connecting terminal matched with the first series part, and the other polar end part of the battery body is electrically connected with the second series part.
10. A battery comprising a plurality of cells according to claim 9; a number of the cells are connected in series.
CN201711095024.XA 2017-11-08 2017-11-08 Series connection spare, battery and group battery Active CN107910488B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711095024.XA CN107910488B (en) 2017-11-08 2017-11-08 Series connection spare, battery and group battery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201711095024.XA CN107910488B (en) 2017-11-08 2017-11-08 Series connection spare, battery and group battery

Publications (2)

Publication Number Publication Date
CN107910488A CN107910488A (en) 2018-04-13
CN107910488B true CN107910488B (en) 2019-12-17

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111293267B (en) * 2020-03-17 2022-03-15 先进储能材料国家工程研究中心有限责任公司 Battery module with fusing protection function

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0963553A (en) * 1995-08-22 1997-03-07 Sanyo Electric Co Ltd Battery pack
US6862164B2 (en) * 2001-05-08 2005-03-01 Tyco Electronics Raychem K.K. Circuit protection arrangement
CN202772215U (en) * 2012-07-24 2013-03-06 深圳市雄韬电源科技股份有限公司 Battery pack connecting device, battery system and electric equipment
CN203631653U (en) * 2013-12-20 2014-06-04 普天新能源车辆技术有限公司 Battery with automatic switch-off function
CN205564863U (en) * 2016-01-22 2016-09-07 东莞市云帆电子科技有限公司 Easy dismouting banked battery's parallelly connected structure of PCB board electricity core

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