WO2023071271A1 - Structure de bloc-batterie inversée, groupe de corps de boîtier de bloc-batterie, dispositif électrique et armoire de stockage d'électricité - Google Patents

Structure de bloc-batterie inversée, groupe de corps de boîtier de bloc-batterie, dispositif électrique et armoire de stockage d'électricité Download PDF

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Publication number
WO2023071271A1
WO2023071271A1 PCT/CN2022/102939 CN2022102939W WO2023071271A1 WO 2023071271 A1 WO2023071271 A1 WO 2023071271A1 CN 2022102939 W CN2022102939 W CN 2022102939W WO 2023071271 A1 WO2023071271 A1 WO 2023071271A1
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WO
WIPO (PCT)
Prior art keywords
battery pack
battery
present application
inverted
pack structure
Prior art date
Application number
PCT/CN2022/102939
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English (en)
Chinese (zh)
Inventor
潘鑫
苗慧敏
可庆朋
陈智明
Original Assignee
宁德时代新能源科技股份有限公司
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Publication of WO2023071271A1 publication Critical patent/WO2023071271A1/fr

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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
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • 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
    • H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
    • 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
    • H01M50/251—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for stationary devices, e.g. power plant buffering or backup power supplies
    • 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
    • H01M50/262—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks
    • 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
    • H01M50/502—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
    • H01M50/531—Electrode connections inside a battery casing
    • 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 connecting piece is directly snapped into the installation groove on the box body, which improves the installation reliability of the battery cell.
  • the installation groove can also bear the expansion force of the battery cell.
  • the present application provides a power storage cabinet.
  • the power storage cabinet includes a battery pack box group, and the battery pack box group is used to provide electric energy for the power storage cabinet.
  • the connecting piece is welded with a boss that is crimped with the adapter, so that the battery cell and the connecting piece are directly assembled, which is convenient for installation and disassembly, and there will be no desoldering during use risks of.
  • Fig. 2 is a cross-sectional view of cells and connecting pieces of an inverted battery pack structure in some embodiments of the present application;
  • FIG. 7 is a schematic structural diagram of an electrical device in some embodiments of the present application.
  • association relationship describing associated objects, which means that there may be three kinds of relationships, such as A and/or B, which may mean: A exists alone, and A exists at the same time and B, there are three cases of B alone.
  • a and/or B which may mean: A exists alone, and A exists at the same time and B, there are three cases of B alone.
  • the character "/" in this application generally indicates that the contextual objects are an "or" relationship.
  • multiple refers to more than two (including two), similarly, “multiple groups” refers to more than two groups (including two), and “multiple pieces” refers to More than two pieces (including two pieces).
  • the safety of power battery pack directly affects the safety performance of the whole vehicle. Therefore, higher requirements are put forward for the design of the battery's strength, stiffness, waterproof sealing, insulation and anti-electromagnetic interference, especially for the waterproof sealing. Due to the high internal voltage of the battery pack, it is necessary to prevent the Risk of short circuit due to water.
  • sealing schemes include sheet metal boxes, die-cast aluminum boxes, etc.
  • the cross-sectional shape is mainly band-shaped rubber strips, which are pasted between the flange of the box body and the plane of the cover plate, and sealed by pressing up and down or left and right.
  • the edge of the box needs to be fully welded.
  • the tower edge tailor welding method usually used can greatly improve the structural strength and sealing performance.
  • the processing is very difficult, and the product consistency is not high;
  • the design fit clearance is difficult to control, and the sealing performance is difficult to achieve the expected effect;
  • the one-piece battery box that participates in the deformation of the frame, the warping deformation of the frame will cause relative displacement between the battery box and the cover plate, the sealing effect will be greatly affected, and there may even be a risk of leakage in the long-term.
  • the reuse of power lithium batteries is a new path to reduce battery costs.
  • Reuse of power lithium battery refers to the intermediate link between new energy vehicles and power lithium battery resource utilization. By dismantling, testing and classifying the power battery after the car is used for secondary use, the power battery cascade is realized, thereby realizing 30-60% cost reduction purpose of power battery.
  • the standard for new energy vehicles to scrap power lithium batteries is that the battery capacity is less than 80%. If the remaining capacity is still 70-80%, it is a great waste to recycle the battery directly. Do a good job of power lithium battery recycling. Utilization is particularly important to reduce battery costs.
  • the field of new energy vehicle power lithium battery reuse is mainly aimed at ICT (information and communication technology) fields, households, and renewable energy power generation and energy storage fields.
  • AC power can be used as the power source, or a battery pack composed of multiple cells connected in series can be used as the power source.
  • the advantage of using a battery pack as a power source is that the power source is portable and not limited to use in a fixed location.
  • Commonly used battery packs mainly include multiple battery modules and battery pack monitoring units. The battery modules are used to provide power, and the battery pack monitoring unit is electrically connected to the battery modules to detect the status of the battery modules, such as voltage, current and temperature etc.
  • a discrete operational amplifier is used for current collection, and after the voltage at both ends of the sampling resistor is scaled by the operational amplifier, the AD (AD) is collected through the MCU (micro control unit). It is an analog-to-digital conversion module) and the voltage value is converted into the corresponding current.
  • Cell refers to the smallest functional unit of a single electrochemical battery containing positive and negative electrodes. It is generally not used directly. It is different from a battery that contains a protective circuit and a shell and can be used directly. It must have a higher energy density. Store as much electric energy as possible, so that electric vehicles have a longer cruising range. In addition, the life of the battery cell is also the most critical factor. The damage of any battery cell will lead to the damage of the entire battery pack.
  • Battery module When multiple batteries are packaged together by the same shell frame and communicate with the outside through a unified boundary, this constitutes a battery module.
  • Battery Pack When several battery modules are jointly controlled or managed by the BMS and thermal management system, the unified whole is called a battery pack.
  • the difference between batteries, battery modules and battery packs is not only the number of batteries, but also whether there is an additional management system.
  • Battery Management System The battery management system is commonly known as the battery nanny or battery steward, mainly for intelligent management and maintenance of each battery unit, to prevent the battery from overcharging and overdischarging, to prolong the service life of the battery, and to monitor the state of the battery .
  • the battery management system unit includes a BMS battery management system, a control module, a display module, a wireless communication module, electrical equipment, a battery module for powering electrical equipment, and a collection module for collecting battery information of the battery module .
  • Beginning of Life BOL
  • EOL End of Life
  • High-Voltage Interlock When the low-voltage power is cut off, the high-voltage circuit can be cut off at the same time through the low-voltage signal control.
  • the Applicant has noticed that there may be a risk of desoldering due to expansion of the cells.
  • the applicant has found that it is possible to provide a Inverted battery pack structure, battery pack box group, electrical device and power storage cabinet.
  • the applicant has designed an inverted battery pack structure after in-depth research, including the battery cell 1, the box body 2 and the connecting piece 3; superior.
  • Each battery cell 1 includes a positive battery pole column and a negative battery pole column, and the positive battery pole column and the negative battery pole column are respectively provided with adapters 101 .
  • the positive cell pole and the negative cell pole of each cell 1 should be respectively connected to different connecting pieces 3, and each connecting piece 3 is provided with a boss 301, The boss 301 is correspondingly fitted and crimped with the adapter 101 of the cell pole to which the connection piece 3 needs to be connected.
  • each battery 1 Since the positive and negative poles of each cell 1 should be connected to different connecting pieces 3, generally speaking, each battery 1 needs to be installed in the box through two connecting pieces 3. 2 on. In particular, when multiple battery cells 1 share the connection piece 3 (that is, the connection pieces 3 connected in series use the same connection piece 3), the multiple battery cells 1 need one connection piece more than the number of battery cells.
  • the number of the installation groove 201 may be one, and at this time, a plurality of connecting pieces 3 are all arranged in the installation groove 201 .
  • the number of installation grooves 201 may also be multiple, and at least one connecting piece is provided in each installation groove. In a specific implementation manner, the number of installation grooves 201 is set in one-to-one correspondence with the number of connecting pieces 3 .
  • the connecting piece 3 is directly snapped into the installation groove 201 on the box body 2, which improves the installation reliability of the battery cell 1.
  • the installation groove 201 not only facilitates the installation of the battery cell 1, but also can bear the expansion force of the battery cell 1.
  • the pole of the battery cell can be connected to the adapter 101 by welding, and the connecting piece 3 can be connected to the boss 301 by welding, and the welded boss 301 and the welded adapter 101 can be press-fitted, so as to realize the connection between the battery 1 and the connecting piece. 3 Direct assembly, easy to install and disassemble, and there is no risk of desoldering during use.
  • an inverted battery pack structure according to an embodiment of the present application is used for description.
  • Fig. 1 is a structural schematic diagram of the battery cell 1 and the connecting piece 3 of the inverted battery pack structure of some embodiments of the present application
  • Fig. 2 is the inverted battery pack of some embodiments of the present application The cross-sectional view of the battery cell 1 and the connection piece 3
  • FIG. 4 is a structural schematic diagram of an inverted battery pack according to some embodiments of the present application.
  • the adapter 101 is welded on the battery pole, and the connecting piece 3 is welded with a boss 301 which is press-fitted with the adapter 101, so as to realize the direct assembly of the battery 1 and the connecting piece 3, which is convenient for installation and disassembly, and There is no risk of desoldering during use.
  • the installation groove 201 and the box body 2 are formed by integral injection molding.
  • FIG. 5 is a second structural diagram of an inverted battery pack according to some embodiments of the present application.
  • the installation groove 201 and the box body 2 are integrally injected at the same time, saving the space of the battery pack and improving the efficiency of battery packs.
  • a locking groove 102 for locking the boss 301 is formed in the adapter 101 .
  • FIG. 3 is a partial enlarged view of part A in the cross-sectional view of the battery cell 1 and the connecting piece 3 of the inverted battery pack structure according to some embodiments of the present application.
  • the boss 301 is engaged in the engagement groove 102 of the adapter 101 to strengthen the stability between the battery cell 1 and the connection piece 3 .
  • the width of the engaging groove 102 is greater than that of the boss 301 ; the boss 301 is pressed against the inner wall of the engaging groove 102 .
  • the two sides of the clamping groove 102 form limit portions, which abut against the outer circumferential surface of the boss 301, which facilitates installation and ensures the stability of the clamping.
  • the connecting piece 3 is L-shaped. Specifically, the connecting piece 3 is L-shaped to facilitate fastening with the installation groove 201 .
  • the connecting piece 3 is directly snapped into the installation groove 201 on the box body 2, which improves the installation reliability of the battery cell 1.
  • the installation groove 201 can also carry The expansion force of cell 1.
  • the adapter 101 is welded on the pole of the battery core, the boss 301 on the connecting piece 3, and the boss 301 and the adapter 101 are press-fitted, so that the battery 1 and the connecting piece 3 can be assembled directly, which is convenient for installation and disassembly, and can be used during use. There is no risk of desoldering.
  • an elastic element is disposed in the adapter 101 .
  • the elastic element is connected to the adapter 101 , the elastic element is at least partially disposed in the locking groove 102 , and has elastic deformation along the locking direction of the boss 301 .
  • the connection piece 3 is in a normal connection state with the cell pole, the elastic element is compressed by the adapter 101 and the boss 301 .
  • the elastic element should have electrical conductivity, and specifically can be a conductive spring.
  • Fig. 6 is a schematic structural diagram of a battery pack case group in some embodiments of the present application; according to some embodiments of the present application, the present application also provides a battery pack case group, which is composed of The battery pack case group 4 composed of the inverted battery pack structure of any of the above embodiments.
  • the adapter 101 is welded on the battery pole, and the connecting piece 3 is welded with a boss 301 which is press-fitted with the adapter 101, so as to realize the direct assembly of the battery 1 and the connecting piece 3, which is convenient for installation and disassembly, and There is no risk of desoldering during use.
  • FIG. 7 is a schematic structural diagram of an electrical device according to some embodiments of the present application; according to some embodiments of the present application, the present application also provides an electrical device 5, which includes a battery pack box group 4.
  • the battery box group 4 is used to provide electric energy for the electrical device 5 .
  • the embodiment of the present application provides an electric device using a battery as a power source.
  • the electric device can be, but not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, and the like.
  • electric toys may include stationary or mobile electric toys, such as game consoles, electric car toys, electric boat toys, and electric airplane toys, etc.
  • Spacecraft may include airplanes, rockets, space shuttles, and spaceships.
  • FIG. 8 is a schematic structural diagram of a power storage cabinet according to some embodiments of the present application; according to some embodiments of the present application, the present application also provides a power storage cabinet, and the power storage cabinet 6 includes a battery pack box group 4 , the battery box group 4 is used to provide electric energy for the power storage cabinet 6 .
  • Fig. 1 is a schematic structural view of the battery cells and connecting pieces of the inverted battery pack structure of some embodiments of the present application
  • Fig. 2 is an inverted battery pack structure of some embodiments of the present application The cross-sectional view of the battery cell and the connecting piece of the battery pack structure
  • Figure 3 is a partial enlarged view of part A in Figure 2
  • Figure 4 is a schematic diagram of the inverted battery pack structure of some embodiments of the present application
  • Figure 5 is some embodiments of the present application Schematic diagram of the inverted battery pack structure II.
  • the application provides an inverted battery pack structure, including a battery cell 1, a box body 2 and a connecting piece 3; a plurality of battery cells 1 are respectively installed on the box body 2 through a plurality of connecting pieces 3;
  • the pole is provided with a plurality of adapters 101
  • the connecting piece 3 is provided with bosses 301 which can be fitted with the adapters 101 by crimping;
  • the installation groove 201 and the box body 2 are integrally formed by injection molding.
  • a locking slot 102 for locking the boss 301 is formed in the adapter 101 .
  • the locking groove 102 has a width greater than that of the boss 301 .
  • the boss 301 is pressed against the inner wall of the locking groove 102 .
  • the connecting piece 3 is L-shaped.
  • the present application welds the adapter 101 on the pole of the battery, and the connecting piece 3 is welded with a boss 301 that is press-fitted with the adapter 101, so that the battery 1 and the connecting piece 3 can be directly connected to each other. Assembly, easy to install and disassemble, and there is no risk of desoldering during use.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

Sont divulgués dans la présente demande une structure de bloc-batterie inversée, un groupe de corps de boîtier de bloc-batterie, un dispositif électrique et une armoire de stockage d'électricité. La structure de bloc-batterie comprend des cellules, un corps de boîtier et des pièces de raccordement, la pluralité de cellules étant respectivement montées sur le corps de boîtier au moyen de la pluralité de pièces de raccordement ; une pluralité de joints d'adaptateur sont disposés sur des pôles d'électrode de cellule des cellules ; et des bossages, qui peuvent être ajustés par pression avec les joints d'adaptateur, sont agencés sur les pièces de raccordement ; et le corps de boîtier est pourvu d'une pluralité de rainures de montage pour venir en prise avec les pièces de raccordement. La structure de bloc-batterie de la présente demande peut résoudre les risques existants de la structure de bloc-batterie provoqués par le soudage, de telle sorte que les pôles d'électrode de cellule sont plus pratiques à monter et à démonter, et il n'y a aucun risque de dessoudage pendant l'utilisation.
PCT/CN2022/102939 2021-10-25 2022-06-30 Structure de bloc-batterie inversée, groupe de corps de boîtier de bloc-batterie, dispositif électrique et armoire de stockage d'électricité WO2023071271A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202122568462.1 2021-10-25
CN202122568462.1U CN216850220U (zh) 2021-10-25 2021-10-25 倒置式电池包结构、电池包箱体组、用电装置及储电柜

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WO2023071271A1 true WO2023071271A1 (fr) 2023-05-04

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Publication number Priority date Publication date Assignee Title
CN216850220U (zh) * 2021-10-25 2022-06-28 宁德时代新能源科技股份有限公司 倒置式电池包结构、电池包箱体组、用电装置及储电柜
CN217788693U (zh) * 2022-07-01 2022-11-11 比亚迪股份有限公司 储能装置和储能装置控制系统
CN117957583A (zh) 2022-08-26 2024-04-30 宁德时代新能源科技股份有限公司 检测图像中的目标点的方法、装置和计算机存储介质

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JP2001028260A (ja) * 1999-07-13 2001-01-30 Nec Saitama Ltd 携帯電話無線機のバッテリー嵌合構造
CN102064397A (zh) * 2010-12-08 2011-05-18 高萌 电池及用于与所述电池连接的电池连接装置
CN103208656A (zh) * 2012-01-16 2013-07-17 微宏动力系统（湖州）有限公司 电池组系统及其漏液检测方法
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CN216850220U (zh) * 2021-10-25 2022-06-28 宁德时代新能源科技股份有限公司 倒置式电池包结构、电池包箱体组、用电装置及储电柜
CN216389613U (zh) * 2021-11-08 2022-04-26 宁德时代新能源科技股份有限公司 电池包、车辆

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