WO2017147821A1 - 电池模组 - Google Patents

电池模组 Download PDF

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Publication number
WO2017147821A1
WO2017147821A1 PCT/CN2016/075353 CN2016075353W WO2017147821A1 WO 2017147821 A1 WO2017147821 A1 WO 2017147821A1 CN 2016075353 W CN2016075353 W CN 2016075353W WO 2017147821 A1 WO2017147821 A1 WO 2017147821A1
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WO
WIPO (PCT)
Prior art keywords
battery
terminal
hole
monitoring unit
connection
Prior art date
Application number
PCT/CN2016/075353
Other languages
English (en)
French (fr)
Inventor
陈传炼
项延火
王德荣
Original Assignee
宁德时代新能源科技股份有限公司
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 宁德时代新能源科技股份有限公司 filed Critical 宁德时代新能源科技股份有限公司
Priority to JP2018517280A priority Critical patent/JP6640338B2/ja
Priority to EP16892012.2A priority patent/EP3425694B1/en
Priority to PCT/CN2016/075353 priority patent/WO2017147821A1/zh
Priority to CN201680054463.3A priority patent/CN108140765B/zh
Publication of WO2017147821A1 publication Critical patent/WO2017147821A1/zh
Priority to US15/986,110 priority patent/US10714717B2/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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/20—Bonding
    • B23K26/21—Bonding by welding
    • B23K26/24—Seam welding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • 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
    • H01M50/271—Lids or covers for the racks or secondary casings
    • 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
    • H01M50/507—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising an arrangement of two or more busbars within a container structure, e.g. busbar modules
    • 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
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
    • 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
    • H01M50/552—Terminals characterised by their shape
    • H01M50/553—Terminals adapted for prismatic, pouch 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/569—Constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R11/00—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts
    • H01R11/11—End pieces or tapping pieces for wires, supported by the wire and for facilitating electrical connection to some other wire, terminal or conductive member
    • H01R11/28—End pieces consisting of a ferrule or sleeve
    • H01R11/281—End pieces consisting of a ferrule or sleeve for connections to batteries
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/50—Fixed connections
    • H01R12/51—Fixed connections for rigid printed circuits or like structures
    • H01R12/55—Fixed connections for rigid printed circuits or like structures characterised by the terminals
    • H01R12/58—Fixed connections for rigid printed circuits or like structures characterised by the terminals terminals for insertion into holes
    • H01R12/585—Terminals having a press fit or a compliant portion and a shank passing through a hole in the printed circuit board
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R2201/00—Connectors or connections adapted for particular applications
    • H01R2201/26—Connectors or connections adapted for particular applications for vehicles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/06—Riveted connections
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
    • H01R4/62—Connections between conductors of different materials; Connections between or with aluminium or steel-core aluminium conductors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/02—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for soldered or welded connections
    • H01R43/0221—Laser welding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/16—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for manufacturing contact members, e.g. by punching and by bending
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to the field of battery technologies, and in particular, to a battery module.
  • the difficulty in increasing the energy of the battery pack is an important factor limiting the development of battery pack technology.
  • One method is to improve the integration of the internal components of the battery pack, and to increase the integration of the components in a limited space to increase the energy density of the battery pack.
  • CMC Cell Module Controler
  • BMU Battery Management Unit
  • the battery monitoring unit collects the voltage temperature signal of the battery inside the battery module, and transmits the signal to the battery management system, and then the battery management system performs charging and discharging control on the battery.
  • a battery monitoring unit is usually integrated inside a battery pack.
  • the number of battery monitoring units generally corresponds to the number of battery modules.
  • the volume occupied by the battery monitoring unit will reduce the energy density of the battery pack.
  • the battery monitoring unit is placed outside the battery module, and the connection between the battery monitoring unit and the battery module is mainly through the wire harness connection.
  • the wire harness connection is simple and easy to implement, the installation is complicated, highly labor-dependent, low in efficiency, easy to install, and high in risk.
  • the wiring harness is easily damaged and there may be a short circuit, which will increase the danger of the battery in extreme situations. Therefore, there is a need for a new, more efficient and safer connection between the battery monitoring unit and the battery module.
  • the invention provides a battery module to overcome the high installation risk of using the wire harness to connect the battery monitoring unit and the battery module in the background art, and the battery is in danger in extreme situations. The problem.
  • the invention provides a battery module, comprising: a power battery, a module shell, a partition board, a battery connecting strip, a detecting terminal and a battery monitoring unit;
  • the power battery is placed in the module housing, the isolation plate is disposed above the power battery, and the pole of the power battery is provided with a through hole corresponding to the pole of the power battery, the battery connection bar Provided above the isolation plate, and connected to the poles of the power battery through the through holes, and electrically connect all the power batteries,
  • the battery monitoring unit is disposed above the isolation plate, and the battery monitoring unit is provided with a pressing hole, the battery connecting bar is provided with a terminal connecting portion, and the detecting terminal is located at the separating plate and the Between the battery monitoring units, one end of the detecting terminal is connected to the terminal connecting portion, and the other end of the detecting terminal is provided with a press-fit joint, and the press-fit joint is press-fitted with the press-fit hole.
  • the detecting terminal is made of the same material as the terminal connecting portion, and the detecting terminal and the end of the terminal connecting portion are connected by laser welding.
  • the switch block further includes a first connecting hole, and the detecting terminal is provided with a second connecting hole away from an end of the pressing joint.
  • One end of the adapter block extends into the first connection hole and is connected to the terminal connection portion, and the other end of the adapter block extends into the second connection hole and is connected to the detection terminal.
  • the transition block is made of the same material as the terminal connection portion, and the detection terminal is different from the material of the terminal connection portion and the transition block.
  • the adapter block and the terminal connecting portion are fixed by a laser welding seam, and the adapter block and the detecting terminal are fixed by riveting or ultrasonic welding.
  • two ends of the transition block are respectively provided with a first boss and a second boss, the first boss protrudes into the first connecting hole, and an edge of the first boss
  • the first connecting hole abuts
  • the second boss protrudes into the second connecting hole
  • an edge of the second boss abuts the second connecting hole.
  • the terminal connecting portion is an extended strip, one end of the extending strip is connected to the battery connecting strip, and the other end of the extending strip extends away from the battery connecting strip, and the detecting terminal connection.
  • the terminal connection portion has a Z-shaped structure.
  • the detecting terminal portion is located inside the isolation plate and is fixedly connected to the isolation plate, and the detection terminal is connected to a lower side of the connection terminal portion.
  • the battery connecting strips are arranged along opposite sides of the longitudinal direction of the separating plate, and a gap is left between the two rows of the battery connecting strips, and the connecting terminal portions extend into the gap.
  • the battery monitoring unit is disposed above the gap.
  • the battery connecting strip comprises a bulging portion and two connecting pieces, and the two connecting pieces are connected by the arching portion, and each of the connecting pieces is respectively connected to a pole of the different power battery. .
  • the battery module provided by the invention eliminates the wire harness, integrates the battery monitoring unit into the battery module, and directly connects the terminal connection portion on the battery connecting strip with the detecting terminal, and adopts a Press-fit process.
  • the method of providing a press-fit joint at the other end of the detecting terminal and connecting with the pressing hole on the battery monitoring unit greatly shortens the distance between the detecting component and the battery connecting strip, and simplifies the connection structure, thereby reducing the installation risk. It also weakens the danger of the battery in extreme cases.
  • FIG. 1 is an exploded view of a battery module according to an embodiment of the present application.
  • FIG. 2 is a schematic overall structural diagram of a battery monitoring unit according to an embodiment of the present application.
  • FIG. 3 is a schematic structural diagram of a first connection manner of a battery connecting strip and a detecting terminal according to an embodiment of the present application
  • FIG. 4 is a front structural view showing a second connection manner of a battery connecting strip and a detecting terminal according to an embodiment of the present application
  • FIG. 5 is an exploded view of a second connection manner of a battery connecting strip and a detecting terminal according to an embodiment of the present application
  • FIG. 6 is a second connection manner of a battery connecting strip and a detecting terminal according to an embodiment of the present application Schematic diagram of the reverse structure
  • FIG. 7 is a schematic structural diagram of a third connection manner of a battery connecting strip and a detecting terminal according to an embodiment of the present application.
  • FIG. 8 is a schematic diagram of an overall structure of a battery module according to an embodiment of the present application.
  • a battery module provided in this embodiment includes a power battery 10 , a module housing 20 , a partition plate 30 , a battery connecting strip 40 , a detecting terminal 50 , and a battery monitoring unit 60 .
  • the power battery 10 is disposed in the module housing 20, and the isolation plate 30 is disposed above the power battery 20 to enclose the power battery 20 in the module housing 20 and the isolation panel 30.
  • Inside the chamber. A through hole is provided on the partition plate 30 corresponding to the pole position of the power battery 20 for the pole to protrude.
  • the battery connecting strip 40 is disposed above the partition plate 30, and is connected to the pole of the power battery 20 through the through hole, and passes through the battery.
  • the connecting strip 40 can connect all of the power batteries 20 together to form an electric circuit, and these power batteries 20 can be connected in series to each other or in parallel with each other.
  • the battery monitoring unit 60 is disposed above the isolation plate 30. As shown in FIG. 2, the battery monitoring unit 60 is provided with a pressing hole 600.
  • the battery connecting bar 40 is provided with a terminal connecting portion 400, a pressing hole 600 and a terminal connection.
  • the sections 400 are each used to detect the connection of the terminals 50.
  • the detecting terminal 50 is located between the isolating plate 30 and the battery monitoring unit 60, one end of the detecting terminal 50 is connected to the terminal connecting portion 400, and the other end of the detecting terminal 50 is provided with a press fitting 500, and the pressing joint 500 is The press-fit hole 600 is press-fitted. During the pressing process, the press-fit joint 500 is deformed, so that the connection ensures a certain holding force, and the electrical signal transmission of the battery connecting strip 40 and the battery monitoring unit 60 is realized.
  • the battery module provided in this embodiment cancels the wire harness, and by integrating the battery monitoring unit 60 into the battery module, the distance between the battery monitoring unit 60 and the battery connecting bar 40 is greatly shortened, so that the battery monitoring unit 60 occupies The battery pack has less space, so the battery pack can leave more room to accommodate more battery modules, making the battery pack more energy efficient.
  • the detecting terminal 50 is directly connected to the terminal connecting portion 400 on the battery connecting strip 40, and at the other end of the detecting terminal 50, a press fitting 500 is provided and connected to the pressing hole 600 on the battery monitoring unit 60.
  • the connection structure between the battery monitoring unit 60 and the battery connecting strip 40 is also simplified, thereby reducing the installation risk and weakening the danger of the battery under extreme conditions, thereby improving the safety and reliability of the battery module. It also improves the production efficiency of the battery module.
  • Method 1 As shown in FIG. 3, if the detection terminal 50 and the terminal connection portion 400 are made of the same material, the detection terminal 50 can be directly connected to the end portion of the terminal connection portion 400 by laser welding to form a laser weld seam.
  • Method 2 As shown in FIGS. 4 to 6, it can be disposed between the terminal connecting portion 400 and the detecting terminal 50.
  • a transition block 70 is disposed, and a first connection hole 402 is disposed on the terminal connection portion 400, and a second connection hole 502 is disposed at an end of the detection terminal 50 away from the press-fit joint 500.
  • one end of the adapter block 70 extends into the first connection hole 402 and is connected to the terminal connection portion 400.
  • the other end of the adapter block 70 extends into the second connection hole 502 and is connected to the detection terminal 50.
  • the adapter block 70 can be manufactured by using the same material as the terminal connection portion 400.
  • the adapter block 70 and the detection terminal 50 are made of different materials, so that the two can be fixed by riveting, and if there is sufficient space, Ultrasonic welding is performed to form an ultrasonic weld joint, or in order to further improve the firmness of the joint, a welded joint is formed by welding after riveting and fixing to strengthen the joint.
  • the adapter block 70 is connected to the detection terminal 50, since the adapter block 70 and the terminal connection portion 400 are made of the same material, they can be fixed by laser welding.
  • the two ends of the adapter block 70 in this embodiment are respectively The first boss 700 and the second boss 702 are disposed.
  • the second boss 702 can extend into the second connecting hole 502, and the edge of the second boss 702 can be opposite to the second connecting hole 502.
  • a snap-like structure is also formed.
  • the second boss 702 is riveted to the detecting terminal 50 to form a boring head 703, which further improves the firmness of the connection, and a weld bead can be formed by welding at the boring head 703 to strengthen the joint.
  • the first boss 700 can also protrude into the first connecting hole 402, and after extending, the edge of the first boss 702 can also abut the first connecting hole 402, so that the first boss 700 and the first connecting hole A snap-like structure is formed between the 402s, and then the gap between the first boss 700 and the first connecting hole 402 is welded by laser welding.
  • Manner 3 As shown in FIG. 7, when the distance between the battery connecting strip 40 and the pressing hole 600 corresponding to the detecting terminal 50 is long, the length of the terminal connecting portion 400 can be extended to become an extension strip for the convenience of connection. One end of the extension strip is connected to the battery connecting strip 40, and the other end of the extension strip extends up to the vicinity of the press-fit hole 600 to be connected to the detecting terminal 50.
  • the terminal connection portion 400 can be arranged in a Z-shaped structure to increase its elastic deformation ability, thereby absorbing the stress generated during the connection process, and making the connection structure more stable. Meanwhile, in the first and second connection methods, since the length of the terminal connecting portion 400 is short, the battery connecting strip 40 can be directly designed in an integrated structure to simplify the manufacturing and assembling method. In the third connection mode, since the terminal connection portion 400 needs to extend a long distance, Its own length is large, so it can be made of a stronger material alone.
  • a part of the detecting terminal 50 may be inserted into the inside of the spacer 30 and fixed, so that the detecting terminal 50 is directly fixed to the spacer 30.
  • both ends of the detecting terminal 50 have the partitioning plate 30 protruding upward, one end of which extends below the connecting terminal portion 400 and is connected to the lower side surface of the connecting terminal portion 400, and one end with the press-fit joint 500 It has also been in a fixed position.
  • the position of the press fitting 500 is ensured to correspond exactly to the position of the press-fit hole 600 on the battery monitoring unit 60, all the press-fit joints can be made by holding the battery monitoring unit 60 above the spacer 30. 500 is inserted into the corresponding nip hole 600.
  • the battery connecting strips 40 in this embodiment are arranged along opposite sides of the longitudinal direction of the partitioning plate 30, and the battery is connected in two rows. A certain gap is left between the strips 40, and all of the connecting terminal portions 400 extend into the gap.
  • the size of the gap is substantially the same as the size and shape of the battery monitoring unit, and the battery monitoring unit 60 is disposed above the gap. In this way, the battery connection unit 60 does not have the battery connection bar 40, so that the distance between the battery monitoring unit 60 and the isolation plate 30 can be further reduced, thereby improving the integration of the battery module and reducing the volume.
  • the battery connecting strip 40 may face the connection stress due to the height difference when connecting the power batteries 10, in order to eliminate The stress, as shown in FIGS. 3 to 6, the battery connecting strip 40 in this embodiment includes a bulging portion 404 and two connecting pieces 406.
  • the two connecting pieces 406 are connected by the arching portion 404, and the elastic shape of the arching portion 404
  • the variable is large, so that when each of the connecting pieces 406 is respectively connected to a pole of a different power battery 10, the stress can be absorbed by the elastic deformation of the arching portion 404, thereby connecting the connecting piece 406 and the power battery 10 more stable.
  • the battery module provided in this embodiment reduces the installation risk and weakens the danger of the battery under extreme conditions, thereby improving the safety and reliability of the battery module and improving the production efficiency of the battery module.
  • the appearance of the battery module also reduces the space occupied by the battery detection original, thereby increasing the energy density of the battery pack.

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

Abstract

本申请提供一种电池模组，包括：动力电池、模组外壳、隔离板、电池连接条、检测端子以及电池监控单元；动力电池放置在模组外壳内，隔离板设置在动力电池的上方，且隔离板上对应动力电池的极柱设置有通孔，电池连接条设置在隔离板的上方，且通过通孔与动力电池的极柱连接，并使所有动力电池电连接，电池监控单元设置在隔离板的上方，且电池监控单元上设置有压合孔，电池连接条上设置有端子连接部，检测端子位于隔离板以及电池监控单元之间，检测端子的一端与端子连接部相连，检测端子的另一端设置有压合接头，压合接头与压合孔压合连接。本申请所提供的电池模组降低了安装风险，也弱化了电池在极端情况下的危险程度。

Description

电池模组 技术领域
本发明涉及电池技术领域，尤其涉及一种电池模组。
背景技术
随着国家相关油耗限制法律法规的提出，如何降低车辆的油耗已经是众多厂商全力解决的问题，其中提高新能源汽车的产量已经成为了厂商解决油耗问题的重要途径，这就需要电池包技术的发展和提高。
电池包的能量难以提高是限制电池包技术发展的重要因素。提高电池包能量密度有许多方法，其中一种方法就是提高电池包内部元器件的集成度，在有限的空间内，尽量提高各部件的集成度，来提高电池包的能量密度。目前，大部分电池包内部会有电池模块，电池监控单元(Cell Module Controler；CMC)、电池管理系统(Battery Management Unit；BMU)等相关部件。其中电池监控单元采集电池模组内部电池的电压温度信号，并将信号传输至电池管理系统，再由电池管理系统对电池进行充放电控制。一个电池包内部通常会集成多个电池监控单元，电池监控单元的数量一般会与电池模组的数量相对应，电池监控单元占用的体积将降低电池包的能量密度。
目前大多数的电池监控单元置于电池模组之外，其体积大，数量多，占用电池包的空间多，不利于提高电池包的能量密度。
同时现有的大部分方案中电池监控单元置于电池模组之外，电池监控单元与电池模组之间的连接就主要是通过线束连接。线束连接虽然简单、容易实现，但是安装复杂，高度依赖人工，效率低，且容易安装出错，风险高。在电池出现极端情况时，线束容易受损，有可能出现短接，将加剧电池在极端情况的危险程度。所以在电池监控单元至电池模组之间需要一种新型的、效率更高，更安全的连接方式。
发明内容
本发明提供一种电池模组，以克服背景技术中采用线束连接电池监控单元以及电池模组所具有的安装风险高以及会加剧电池在极端情况下危险程度 的问题。
本发明提供一种电池模组，包括：动力电池、模组外壳、隔离板、电池连接条、检测端子以及电池监控单元；
所述动力电池放置在所述模组外壳内，所述隔离板设置在所述动力电池的上方，且所述隔离板上对应所述动力电池的极柱设置有通孔，所述电池连接条设置在所述隔离板的上方，且通过所述通孔与所述动力电池的极柱连接，并使所有所述动力电池电连接，
所述电池监控单元设置在所述隔离板的上方，且所述电池监控单元上设置有压合孔，所述电池连接条上设置有端子连接部，所述检测端子位于所述隔离板以及所述电池监控单元之间，所述检测端子的一端与所述端子连接部相连，所述检测端子的另一端设置有压合接头，所述压合接头与所述压合孔压合连接。
优选地，所述检测端子与所述端子连接部的材质相同，所述检测端子与所述端子连接部的端部通过激光焊接相连。
优选地，还包括转接块，所述端子连接部上设置有第一连接孔，所述检测端子远离所述压合接头的一端设置有第二连接孔，
所述转接块的一端伸入所述第一连接孔，并与所述端子连接部连接，所述转接块的另一端伸入所述第二连接孔，并与所述检测端子连接。
优选地，所述转接块与所述端子连接部的材质相同，所述检测端子与所述端子连接部以及所述转接块的材质不同，
所述转接块与所述端子连接部通过激光焊缝相固定，所述转接块与所述检测端子通过铆接或超声波焊缝相固定。
优选地，所述转接块的两端分别设置有第一凸台以及第二凸台，所述第一凸台伸入所述第一连接孔内，且所述第一凸台的边缘与所述第一连接孔相抵，所述第二凸台伸入所述第二连接孔内，且所述第二凸台的边缘与所述第二连接孔相抵。
优选地，所述端子连接部为延伸条，所述延伸条的一端与所述电池连接条连接，所述延伸条的另一端向远离所述电池连接条的方向延伸，且与所述检测端子连接。
优选地，所述端子连接部为Z形结构。
优选地，所述检测端子部分位于所述隔离板的内部，并与所述隔离板固定连接，所述检测端子与所述连接端子部的下侧连接。
优选地，所述电池连接条均沿着所述隔离板长度方向相对的两侧排布，两排所述电池连接条之间留有间隙，所述连接端子部均延伸至所述间隙内，所述电池监控单元设置在所述间隙的上方。
优选地，所述电池连接条包括拱起部以及两个连接片，两个所述连接片通过所述拱起部相连，每个所述连接片分别与不同的所述动力电池的极柱连接。
本发明所提供的电池模组取消了线束，通过将电池监控单元集成在电池模组内部，并采用检测端子直接与电池连接条上的端子连接部连接，同时采用Press-fit(压合工艺)，在检测端子的另一端设置压合接头并与电池监控单元上的压合孔相连接的方式，大幅缩短了检测部件与电池连接条的相隔距离，也简化了连接结构，因此降低了安装风险，也弱化了电池在极端情况下的危险程度。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作一简单地介绍，显而易见地，下面描述中的附图是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1为本申请实施例所提供的电池模组的爆炸图；
图2为本申请实施例所提供的电池监控单元整体结构示意图；
图3为本申请实施例所提供的电池连接条与检测端子的第一种连接方式的结构示意图；
图4为本申请实施例所提供的电池连接条与检测端子的第二种连接方式的正面结构示意图；
图5为本申请实施例所提供的电池连接条与检测端子的第二种连接方式的爆炸图；
图6为本申请实施例所提供的电池连接条与检测端子的第二种连接方式 的反面结构示意图；
图7为本申请实施例所提供的电池连接条与检测端子的第三种连接方式的结构示意图；
图8为本申请实施例所提供的电池模组的整体结构示意图。
附图标记：
10-动力电池
20-模组外壳
30-隔离板
40-电池连接条
400-端子连接部
402-第一连接孔
404-拱起部
406-连接片
50-检测端子
500-压合接头
502-第二连接孔
60-电池监控单元
600-压合孔
70-转接块
700-第一凸台
702-第二凸台
703-镦头
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
如图1和图6所示，本实施例所提供的一种电池模组，包括动力电池10、模组外壳20、隔离板30、电池连接条40、检测端子50以及电池监控单元60。其中，动力电池10的数量较多，且并排放置在模组外壳20内，隔离板30设置在这些动力电池20的上方，将动力电池20封闭在由模组外壳20以及隔离板30所构成的腔室内。在隔离板30上对应动力电池20的极柱位置设置有通孔供极柱伸出，电池连接条40设置在隔离板30的上方，并且通过通孔与动力电池20的极柱连接，通过电池连接条40能够将所有的动力电池20都连接在一起构成电路，这些动力电池20之间可以相互串联，也可以相互并联。电池监控单元60设置在隔离板30的上方，如图2所示，在电池监控单元60上设置有压合孔600，电池连接条40上设置有端子连接部400，压合孔600以及端子连接部400均用于检测端子50的连接。具体地，检测端子50位于隔离板30以及电池监控单元60之间，检测端子50的一端与端子连接部400相连，而检测端子50的另一端则设置有压合接头500，压合接头500与压合孔600压合连接。压合过程中，压合接头500会产生形变，使连接保证一定的保持力，实现电池连接条40与电池监控单元60的电信号传输。
本实施例所提供的电池模组取消了线束，通过将电池监控单元60集成在电池模组内部，大幅缩短了电池监控单元60与电池连接条40的相隔距离，使得电池监控单元60所占用的电池包空间更少，因此电池包能够留出更多的空间来容纳更多的电池模组，使得电池包的能量密度更高。并且，采用检测端子50直接与电池连接条40上的端子连接部400连接，同时在检测端子50的另一端设置压合接头500并与电池监控单元60上的压合孔600相连接的方式，也简化了电池监控单元60与电池连接条40之间的连接结构，因此降低了安装风险，也弱化了电池在极端情况下的危险程度，从而提高了电池模组的安全性、可靠性，同时也提高了电池模组的生产效率。
在本实施例中，根据不同情况，检测端子50与端子连接部400之间存在不同的连接方式。
方式一：如图3所示，若检测端子50与端子连接部400的材质相同，则检测端子50可以与端子连接部400的端部直接通过激光焊接形成激光焊缝相连。
方式二：如图4至6所示，可以在端子连接部400与检测端子50之间设 置一个转接块70，并在端子连接部400上设置第一连接孔402，在检测端子50远离压合接头500的一端设置第二连接孔502。装配时，转接块70的一端伸入第一连接孔402内，并与端子连接部400连接，转接块70的另一端则伸入第二连接孔502内，并与检测端子50连接。在检测端子50与端子连接部400的材质不同时，这种结构能够较好的实现二者的连接。具体地，可以采用与端子连接部400相同的材质制造转接块70，这样，转接块70与检测端子50的材质不同，因此二者可采用铆接方式进行固定，如果有足够的空间也可以进行超声波焊接形成超声波焊缝固定，或者为了进一步提高连接的牢固程度，在采用铆接固定后再通过焊接的方式形成焊缝来加固连接。转接块70与检测端子50连接后，由于转接块70与端子连接部400材质相同，因此可以通过激光焊接固定。
为了能够使转接块70与端子连接部400以及检测端子50之间的连接更为牢固，并且也能够简化装配工艺，如图5所示，本实施例中的转接块70的两端分别设置了第一凸台700以及第二凸台702，第二凸台702可以伸入第二连接孔502内，并且第二凸台702的边缘能够与第二连接孔502相抵，二者之间也形成类似卡接的结构。第二凸台702与检测端子50铆接后形成镦头703，进一步的提高连接的牢固程度，可在镦头703处焊接的方式形成焊缝来加固连接。第一凸台700也能够伸入第一连接孔402内，并且在伸入后，第一凸台702的边缘还能够与第一连接孔402相抵，使第一凸台700与第一连接孔402之间形成类似卡接的结构，之后再通过激光焊接将第一凸台700与第一连接孔402之间的缝隙焊接。
方式三：如图7所示，当电池连接条40与检测端子50所对应的压合孔600的距离较远时，为了便于连接，可以延长端子连接部400的长度，使其变为延伸条，将延伸条的一端与电池连接条40连接，而延伸条的另一端则可一直延伸至压合孔600的附近，与检测端子50进行连接。
在上边三种连接方式中，端子连接部400均可设置为Z形结构，以增加自身的弹性形变能力，从而吸收连接过程中所产生的应力，使连接结构更为稳固。同时，第一种以及第二种连接方式中，由于端子连接部400的长度较短，因此可以直接与电池连接条40采用一体式结构设计，以简化制造以及装配方法。而第三种连接方式中，由于端子连接部400需要延伸的距离较长， 自身的长度尺寸较大，因此可以单独使用强度更高的材质制造。
在本实施例中，为了进一步简化装配方法，提高装配精度，还可以将检测端子50的一部分伸入隔离板30的内部并固定，使检测端子50直接被固定在隔离板30上。此时，检测端子50的两端均有隔离板30向上伸出，其中一端延伸至连接端子部400的下方，并与连接端子部400的下侧表面连接，而带有压合接头500的一端则也一直处于固定的位置。只要保证压合接头500所处的位置正好与电池监控单元60上的压合孔600的位置相对应，便可通过将电池监控单元60扣放在隔离板30上方的同时使所有的压合接头500一并插入到对应的压合孔600内。
请参见图1和图6，为了进一步提高电池模组的集成度，减少体积，本实施例中的电池连接条40均沿着隔离板30长度方向相对的两侧排布，在两排电池连接条40之间留有一定的间隙，所有连接端子部400均延伸至间隙内，该间隙的尺寸与电池监控单元的尺寸以及形状基本一致，电池监控单元60则设置在间隙的上方。这样，电池监控单元60的下方便不会存在电池连接条40，使电池监控单元60与隔离板30之间的间距能够进一步缩小，从而提高电池模组的集成度，减少体积。
由于动力电池10高度方向存在公差，且各动力电池10在装配过程中也会存在高度差，因此电池连接条40在连接各动力电池10时可能面临因高度差异而带来的连接应力，为了消除应力，如图3至6所示，本实施例中的电池连接条40包括拱起部404以及两个连接片406，两个连接片406通过拱起部404相连，拱起部404的弹性形变量较大，因此当每个连接片406分别与不同的动力电池10的极柱连接时，能够通过拱起部404的弹性形变吸收应力，从而使连接片406与动力电池10之间的连接结构更加稳定。
本实施例所提供的电池模组降低了安装风险，也弱化了电池在极端情况下的危险程度，从而提高了电池模组的安全性、可靠性，同时也提高了电池模组的生产效率。此外，该电池模组的出现还同时减少了电池检测原件所占用的空间，因此提高了电池包的能量密度。
最后应说明的是：以上各实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述各实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进 行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的范围。

Claims (10)

  1. 一种电池模组，其特征在于，包括：动力电池、模组外壳、隔离板、电池连接条、检测端子以及电池监控单元；
    所述动力电池放置在所述模组外壳内，所述隔离板设置在所述动力电池的上方，且所述隔离板上对应所述动力电池的极柱设置有通孔，所述电池连接条设置在所述隔离板的上方，且通过所述通孔与所述动力电池的极柱连接，并使所有所述动力电池电连接，
    所述电池监控单元设置在所述隔离板的上方，且所述电池监控单元上设置有压合孔，所述电池连接条上设置有端子连接部，所述检测端子位于所述隔离板以及所述电池监控单元之间，所述检测端子的一端与所述端子连接部相连，所述检测端子的另一端设置有压合接头，所述压合接头与所述压合孔压合连接。
  2. 根据权利要求1所述的电池模组，其特征在于，所述检测端子与所述端子连接部的材质相同，所述检测端子与所述端子连接部的端部通过激光焊接相连。
  3. 根据权利要求1所述的电池模组，其特征在于，还包括转接块，所述端子连接部上设置有第一连接孔，所述检测端子远离所述压合接头的一端设置有第二连接孔，
    所述转接块的一端伸入所述第一连接孔，并与所述端子连接部连接，所述转接块的另一端伸入所述第二连接孔，并与所述检测端子连接。
  4. 根据权利要求3所述的电池模组，其特征在于，所述转接块与所述端子连接部的材质相同，所述检测端子与所述端子连接部以及所述转接块的材质不同，
    所述转接块与所述端子连接部通过激光焊缝相固定，所述转接块与所述检测端子通过铆接或超声波焊缝相固定。
  5. 根据权利要求3所述的电池模组，其特征在于，所述转接块的两端分别设置有第一凸台以及第二凸台，所述第一凸台伸入所述第一连接孔内，且所述第一凸台的边缘与所述第一连接孔相抵，所述第二凸台伸入所述第二连接孔内，且所述第二凸台的边缘与所述第二连接孔相抵。
  6. 根据权利要求1所述的电池模组，其特征在于，所述端子连接部为延 伸条，所述延伸条的一端与所述电池连接条连接，所述延伸条的另一端向远离所述电池连接条的方向延伸，且与所述检测端子连接。
  7. 根据权利要求1所述的电池模组，其特征在于，所述端子连接部为Z形结构。
  8. 根据权利要求1至7任一项所述的电池模组，其特征在于，所述检测端子部分位于所述隔离板的内部，并与所述隔离板固定连接，所述检测端子与所述连接端子部的下侧连接。
  9. 根据权利要求1至7任一项所述的电池模组，其特征在于，所述电池连接条均沿着所述隔离板长度方向相对的两侧排布，两排所述电池连接条之间留有间隙，所述连接端子部均延伸至所述间隙内，所述电池监控单元设置在所述间隙的上方。
  10. 根据权利要求1至7任一项所述的电池模组，其特征在于，所述电池连接条包括拱起部以及两个连接片，两个所述连接片通过所述拱起部相连，每个所述连接片分别与不同的所述动力电池的极柱连接。
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