WO2023216417A1 - 汇流构件、电池及用电装置 - Google Patents

汇流构件、电池及用电装置 Download PDF

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Publication number
WO2023216417A1
WO2023216417A1 PCT/CN2022/107101 CN2022107101W WO2023216417A1 WO 2023216417 A1 WO2023216417 A1 WO 2023216417A1 CN 2022107101 W CN2022107101 W CN 2022107101W WO 2023216417 A1 WO2023216417 A1 WO 2023216417A1
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WO
WIPO (PCT)
Prior art keywords
main body
connection
bus
battery
present application
Prior art date
Application number
PCT/CN2022/107101
Other languages
English (en)
French (fr)
Inventor
刘少钟
冯驰骋
郑陈铃
王冲
方郑宇
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.)
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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 EP22940513.9A priority Critical patent/EP4322311A1/en
Priority to US18/228,998 priority patent/US20230378615A1/en
Publication of WO2023216417A1 publication Critical patent/WO2023216417A1/zh

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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
    • H01M50/50—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
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/514—Methods for interconnecting adjacent batteries or cells
    • H01M50/516—Methods for interconnecting adjacent batteries or cells by welding, soldering or brazing
    • 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
    • H01M50/514—Methods for interconnecting adjacent batteries or cells
    • H01M50/517—Methods for interconnecting adjacent batteries or cells by fixing means, e.g. screws, rivets or bolts
    • 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
    • H01M50/521—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the material
    • H01M50/522—Inorganic material
    • 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
    • H01M50/521—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the material
    • H01M50/526—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the material having a layered structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
    • H01M50/529—Intercell connections through partitions, e.g. in a battery casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—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
    • H01M50/588—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries outside the batteries, e.g. incorrect connections of terminals or busbars
    • 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

Definitions

  • the present application relates to the field of battery technology, and in particular to a bus component, a battery and an electrical device.
  • the battery usually includes multiple battery cells, which are connected in series or parallel to adjust to the required output voltage.
  • the high-voltage connection between multiple battery cells is usually achieved by using a bus component.
  • the bus component spans between adjacent and spaced battery cells. Therefore, part of the middle area of the bus component is unsupported. Set in the air, when relative vibration occurs between the two battery cells connected by each bus component, the bus component is prone to fatigue fracture due to stress concentration or repeated stress, resulting in failure of the high-voltage connection, ultimately affecting the output of the battery and reducing the module load. group reliability.
  • the present application provides a bus component, a battery and an electrical device, which can absorb vibration in the stacking direction and improve the fatigue fracture problem of the bus component.
  • the present application provides a bus component for connecting battery units, which has a predetermined length and thickness.
  • the bus component includes alternately distributed connecting parts and a main body part in its length direction, and the main part is on both sides in the length direction.
  • Each is connected with a connecting portion, which includes a connecting area that is electrically connected to the battery unit.
  • the main body In the thickness direction of the bus member, the main body is at least partially recessed and can deform under a preset stress to absorb vibration in the thickness direction.
  • the bus component used to form electrical connections between battery units is configured to include connecting portions and a main body portion alternately arranged along its length direction, wherein the connecting portion is connected to the battery units, and the main body
  • the main body part bridges between adjacent battery cells to conduct the battery cells on both sides.
  • the main body part In the thickness direction of the bus member itself, the main body part has a recessed partial area, which allows the main body part to have a certain degree of elasticity. At the same time, the main body can deform accordingly under the action of stress concentration to absorb vibration in the thickness direction.
  • the main body When relative vibration occurs along the thickness direction between the battery cells connected by the connecting parts on both sides, the main body can deform and absorb the vibration through the deformation and the elasticity of the recessed part, thereby avoiding fatigue fracture of the main body and improving the confluence component. Overall connection reliability.
  • the main body part and the connecting part are made of the same material, and the main body part and the connecting part are integrally formed.
  • the manifold components in the embodiments of the present application can be made of the same material and integrally formed from a single piece of material, which can simplify the process flow and reduce process costs.
  • connection portion includes multiple connection layers stacked in a thickness direction. By laminating multiple layers of materials to form the connection part, the strength of the connection part can be improved, making the connection with the battery unit more reliable.
  • connection part includes a reinforced plating layer
  • the reinforced plating layer is at least partially disposed in the connection area.
  • the bus component in the embodiment of the present application can also adopt a method of making a plating layer in a partial area connected to the battery unit to improve the strength of this area and make the electrical connection reliable.
  • the strength of the main body portion is less than the strength of the connection portion.
  • the main part can be made of materials with lower hardness and lower strength, which makes it easier for the main part to absorb vibration without affecting the connecting part.
  • the main body part and the connecting part are welded together.
  • the main part and the connecting part may be connected by welding so that the connection is stable and does not affect current conduction.
  • the connecting portion and the main body portion are at least partially overlapped in the thickness direction.
  • the connecting part and the main body part can also be partially overlapped to connect and fix through the overlapping parts, making the connection more stable.
  • the connecting portion is provided with a first fixing hole
  • the main body portion is provided with a second fixing hole
  • the confluence member further includes a fastener, and the first fixing hole and the second fixing hole cooperate through the fastener to facilitate the connection.
  • the main part and the main part are connected and fixed, and/or one of the main part and the connecting part is provided with a protruding end and the other is provided with a connecting hole.
  • the bus component also includes a stopper, and the protruding end passes through the connecting hole and Cooperate with the limiting piece to connect and fix the connecting part with the main part.
  • the two can also be connected by drilling holes and using fasteners or limiting parts. This connection method is simple, structurally stable, and easy to implement.
  • the connecting portion is riveted to the main body portion.
  • the connecting part and the main body part can also be fixedly connected by rivets. This connection method has high stability and low cost.
  • the present application provides a battery, which includes a plurality of battery cells and the bus member in the above embodiment, and adjacent battery cells are electrically connected through the bus member.
  • the present application provides an electrical device, including the battery provided in the embodiment of the second aspect.
  • Figure 1 is a schematic structural diagram of a vehicle provided by some embodiments of the present application.
  • FIG. 2 is an exploded schematic diagram of a battery provided by some embodiments of the present application.
  • FIG. 3 is a partial structural diagram of the battery shown in Figure 2;
  • Figure 4 is a schematic structural diagram of a bus component in some embodiments of the present application.
  • Figure 5 is an exploded view of the manifold component shown in Figure 4.
  • Figure 6 is an exploded view of a manifold component according to some embodiments of the present application.
  • Figure 7 is a schematic structural diagram of a bus component in some embodiments of the present application.
  • Figure 8 is an exploded view of the manifold component shown in Figure 7;
  • Figure 9 is a schematic structural diagram of a bus component in some embodiments of the present application.
  • Figure 10 is an exploded view of the manifold component shown in Figure 7;
  • Figure 11 is a schematic structural diagram of a bus component in some embodiments of the present application.
  • FIG. 12 is an exploded view of the manifold component shown in FIG. 11 .
  • 10-connection part 20-main part; 30-fastener; 40-protruding end; 50-connection hole; 60-limiter; 70-first box part; 80-second box part; 90 - Accommodation space;
  • an embodiment means that a particular feature, structure or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application.
  • the appearances of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those skilled in the art understand, both explicitly and implicitly, that the embodiments described herein may be combined with other embodiments.
  • multiple refers to more than two (including two).
  • multiple groups refers to two or more groups (including two groups), and “multiple pieces” refers to It is more than two pieces (including two pieces).
  • the application scale of power batteries is gradually increasing, and they are widely used in energy storage systems of power stations, power sources of transportation and even aerospace machinery.
  • the demand for power batteries in the market is also increasing. gradually increase.
  • the battery In order to achieve a certain output power or output voltage, in some cases, the battery is usually composed of multiple battery cells connected in series or parallel. High-voltage connections between these battery cells usually require the use of bus components for electrical connection.
  • the inventor of the present application noticed that during the use of the battery, when the battery is affected by the external environment and vibrates, there is usually a certain difference between the vibration amplitudes of adjacent battery units or adjacent batteries, resulting in phase differences.
  • Relative vibration occurs between adjacent battery cells or adjacent batteries, and considering the installation direction of the battery cells, the relative vibration is usually relative vibration along the thickness direction of the bus member itself.
  • a certain gap is usually set between adjacent battery units or batteries to form an expansion margin.
  • the middle part of the bus member corresponding to the gap forms a gap that spans both sides and has no support below. structure, and in order to form an electrical connection, the bus components are usually made of wear-resistant hard metal materials. After this part of the bridging bus component is subjected to the force exerted by the aforementioned relative vibration, it is easy to cause fatigue fracture due to repeated stress concentration, and eventually There is a problem of high-voltage sampling failure.
  • the inventor of the present application proposes a bus component and the corresponding battery, which absorbs the stress at both ends of the bus component in the direction of its thickness by changing the hardness of the bus component itself. Relative vibration on the bus, thus improving the fatigue fracture problem of bus components.
  • the electrical devices can be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys and power tools, etc.
  • Vehicles can be fuel vehicles, gas vehicles or new energy vehicles, and new energy vehicles can be pure electric vehicles, hybrid vehicles or extended-range vehicles, etc.
  • spacecraft include aircraft, rockets, space shuttles, spaceships, etc.
  • electric toys include fixed Type or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric airplane toys, etc.
  • electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools and railway electric tools, for example, Electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, planers and more.
  • Electric drills Electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, planers and more.
  • the batteries disclosed in the embodiments of the present application can be used in, but are not limited to, the aforementioned electrical devices such as vehicles, ships, or aircrafts.
  • a power supply system including bus components, batteries, etc. disclosed in this application can be used to form the electrical device.
  • the bus component is arranged between adjacent battery units as an example for description.
  • the present application is not limited to this, and the embodiments of the present application may also be used.
  • the bus components provided are used in other situations where there is relative vibration and electrical connections are required, and to protect them together.
  • the following embodiments take the electrical device as a vehicle as an example.
  • FIG. 1 is a schematic structural diagram of a vehicle provided by some embodiments of the present application.
  • a battery 2000 is disposed inside the vehicle 1000 .
  • the battery 2000 may be disposed at the bottom, head, or tail of the vehicle 1000 .
  • the battery 2000 may be used to power the vehicle 1000 , for example, the battery 2000 may serve as an operating power source for the vehicle 1000 .
  • the vehicle 1000 may also include a controller 3000 and a motor 4000.
  • the controller 3000 is used to control the battery 2000 to provide power to the motor 4000, for example, to meet the power requirements for starting, navigation and driving of the vehicle 1000.
  • the battery 2000 can not only be used as an operating power source for the vehicle 1000 , but can also be used as a driving power source for the vehicle 1000 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000 .
  • Figure 2 is an exploded schematic diagram of a battery provided by some embodiments of the present application.
  • Figure 3 is a partial structural schematic diagram of the battery shown in Figure 2.
  • Figure 4 is a schematic structural diagram of a bus component of some embodiments of the present application.
  • the battery 2000 may include a case 300 , a battery unit 200 , and a bus member 100 .
  • the bus member 100 is used to electrically connect at least two battery units 200 .
  • the bus member 100 has a connecting part 10 and a main body part. 20.
  • the connection part 10 is electrically connected to the battery unit 200.
  • the box 300 is used to accommodate the battery unit, and the box 300 can be of various structures.
  • the box body 300 may include a first box body part 70 and a second box body part 80 , the first box body part 70 and the second box body part 80 cover each other, the first box body part 70 and the second box body part 80
  • the two box parts 80 jointly define an accommodation space 90 for accommodating the battery unit 200 .
  • the second box part 80 may be a hollow structure with one end open, and the first box part 70 is a plate-shaped structure, and the first box part 70 is covered with the opening side of the second box part 80 to form a receiving space 90
  • the box 300; the first box part 70 and the second box part 80 can also be a hollow structure with one side open, and the open side of the first box part 70 is covered with the open side of the second box part 80 , to form a box 300 having an accommodation space 90 .
  • the first box part 70 and the second box part 80 can be in various shapes, such as cylinder, rectangular parallelepiped, etc.
  • a sealing member may also be provided between the first box part 70 and the second box part 80 , such as sealant, sealing ring, etc. .
  • the first box part 70 can also be called an upper box cover, and the second box part 80 can also be called a lower box.
  • the battery 2000 there may be a plurality of battery units 200.
  • the multiple battery units 200 may be connected in series, in parallel, or in mixed connection.
  • Mixed connection means that the multiple battery units 200 are connected in series and in parallel.
  • Multiple battery units 200 can be directly connected in series, parallel, or mixed together.
  • multiple battery units 200 can also be connected in series, parallel, or mixed to form a battery module, and then multiple battery modules can be connected in series, parallel, or mixed.
  • the mixed connection forms a whole and is accommodated in the box 300 .
  • FIGS. 2 and 3 there are multiple battery units 200 , and the multiple battery units 200 are first connected in series, parallel, or mixed to form a battery module. Multiple battery modules are connected in series, parallel or mixed to form a whole.
  • the multiple battery units 200 in the battery module can be electrically connected through the bus member 100 to achieve parallel, series or mixed connection of the multiple battery units 200 in the battery module.
  • There may be one or more bus members 100 and each bus member 100 is used to electrically connect at least two battery units 200 .
  • Figure 3 is a partial structural diagram of the battery shown in Figure 2.
  • Figure 4 is a structural schematic diagram of the bus component of some embodiments of the present application.
  • Figure 5 is an explosion of the bus component shown in Figure 4. picture.
  • This application provides a bus component 100 for connecting battery cells 200, which has a predetermined length and thickness.
  • the bus component 100 includes alternately distributed connecting parts 10 and a main body part 20 in the length direction Connecting portions 10 are respectively connected to both sides of Deformation is used to absorb vibration in the thickness direction Y.
  • the bus component 100 provided in the embodiment of the present application is erected between the battery units 200, and the bus component 100 includes alternately distributed connecting parts 10 and main body parts 20, where the connecting parts 10 are used to electrically connect with the cells of the battery units 200.
  • the main body part 20 is connected between two adjacent connection parts 10 and conducts the two connection parts 10 so that the required electrical connection is formed between the battery units 200 .
  • Each connection part 10 includes at least one connection area 11 that is electrically connected to the battery unit 200.
  • the connection area 11 may be welded to the pole of the battery unit 200. In this case, there are certain requirements for the strength of the connection area 11.
  • the main body portion 20 spans the gap area between two adjacent battery units 200 and bridges between the connecting portions 10 that are respectively connected to the two battery units 200 .
  • the main body part 20 in the embodiment of the present application is made of a material with low hardness, so that when relative vibration occurs between the battery units 200 on both sides, that is, when relative vibration occurs between the connecting parts 10 on both sides of the main body part 20 At this time, the manifold member 100 may be subjected to a stress exceeding a predetermined level. At this time, the main body 20 is first deformed, and the stress generated by the vibration is concentrated somewhere on the unsupported main body 20 and causes the main body 20 to break. problem, and at the same time, it can also reduce the impact of relative vibration on the connection part 10, thereby ensuring a stable and reliable connection between the connection part 10 and the battery unit 200, improving the overall reliability of the battery 2000, and enabling it to operate in severe situations of frequent vibrations. environment to work normally.
  • the main body 20 can be made of a material with high conductivity, softness, and corrosion resistance.
  • the main body 20 can be a soft aluminum sheet, but it should be understood that the present application is not limited thereto.
  • the main body 20 is also provided with a recessed portion 21 that is recessed along its thickness direction.
  • the recessed portion 21 is recessed in a direction closer to the battery unit 200 , that is, the recessed portion 21 is located between two adjacent battery units 200 . Therefore, the space for disposing the bus member 100 and the battery unit 200 can be saved.
  • the main body portion 20 can have a certain elasticity and buffering effect. When the main body portion 20 is subjected to external stress, a certain stress can be absorbed first through the angle change between the bottom of the recessed portion 21 and the side wall. When the stress exceeds the preset value, the main body 20 will undergo further deformation without breaking due to the soft material.
  • the combination of the material itself and the structure of the recessed portion 21 can effectively increase the upper limit of the stress that the main body portion 20 can withstand, further increasing the reliability of the connection.
  • each bus component 100 in the embodiment of the present application may include multiple connecting parts 10 and multiple main parts 20 , and the connecting parts 10 may be designed according to the location and number of battery units 20 that need to be connected. , it is only necessary to ensure that each main body part 20 is provided with connection parts 10 on both sides in the length direction X, that is, there may be multiple adjacent connection parts 10.
  • these connecting portions 10 and the main portions 20 can be alternately extended along the same direction, or can be connected to one of the battery units 200 as needed. The relative positions between them cause the extension direction of the converging member 100 to bend or shift accordingly.
  • the present application takes a structure in which two connecting parts 10 and one main body part 20 are connected between two adjacent battery units 200 as an example for description.
  • the application is not limited to this.
  • the main body part 20 and the connecting part 10 are made of the same material, and the main body part 20 and the connecting part 10 are integrally formed.
  • the bus component 100 in the embodiment of the present application can be made of the same material as a whole, so that the connecting part 10 and the main part 20 can be completely and integrally formed. That is, the connecting portion 10 and the main body portion 20 can be integrally made of a material with low hardness and capable of deforming under a predetermined amount of stress, thereby eliminating the need for connecting the connecting portion 10 to the main body portion 20 . required processes, thereby saving costs.
  • the bus component 100 is composed of a connecting portion 10 and a main body portion 20 , where the connecting portion 10 is connected to the battery unit 200 , and usually, the connection method can be welding.
  • the connection part 10 at this time needs to have a certain strength and a certain size, that is, the connection part 10 needs to meet the prerequisites for welding processing, so that it can form a stable connection with the battery unit 200. Therefore, when selecting the material of the connecting portion 10, it is necessary to ensure the strength of the material itself used for integral molding.
  • connection portion 10 includes multiple connection layers 12 stacked along the thickness direction Y.
  • connection part 10 in the bus component 100 needs to be electrically connected to the battery unit 200.
  • This connection can be achieved by welding, so there are certain requirements for the strength of the connection part 10 itself.
  • the connecting portion 10 and the main body portion 20 are integrally formed using a material with lower hardness, the material of the connecting portion 10 itself may not meet the required welding conditions.
  • the connecting portion 10 can be strengthened to improve the welding quality.
  • the overall strength of the connection part 10 can be, for example, formed by laminating multiple layers of materials, that is, multiple layers of connection layers 12 are provided, and the multi-layer connection layers 12 are pressed together to form the connection part 10 to improve the connection part 10 The strength makes the connection between it and the battery unit 200 more stable and reliable.
  • the outline shape and size of the multi-layer connection layers 12 can be the same, or of course they can be different.
  • the shapes of the multi-layer connection layers 12 are different, among every two adjacent connection layers 12 , the orthographic projection outline of the connection layer 12 far away from the battery unit 200 on the connection layer 12 close to the battery unit 200 can be Within the latter contour, that is, along the direction closer to the battery unit 200 , the area of the connection layer 12 may be gradually increased to first ensure a stable connection with the battery unit 200 .
  • the main body part 20 can also be formed by a multi-layered configuration, that is, using a multi-layer thin layer structure and hot pressing processing.
  • the number of thin layers in the main body 20 and the number of connecting layers 12 in the connecting part 10 can be the same or different, as long as the overall hardness of the main body 20 is ensured to enable it to vibrate along the thickness direction Y. It suffices that deformation occurs instead of fracture, and this application does not specifically limit this.
  • connection part 10 includes a reinforced plating layer, and the reinforced plating layer is at least partially disposed on the connection area 11 .
  • the bus component 100 in the embodiment of the present application can also use a method of making a reinforced plating layer to improve the strength of the connecting portion 10.
  • the wear resistance and corrosion resistance of the connecting portion 10 can also be correspondingly improved according to the material of the reinforcing plating layer.
  • the reinforced plating layer may be provided to cover the entire connection part 10 , or the reinforced plating layer may be provided only in the connection area 11 to increase the strength of the connection area 11 , enable soldering connection, and improve the reliability of the electrical connection.
  • the material for reinforcing the plating layer may be corrosion-resistant metal materials such as tin, chromium, nickel or zinc.
  • the strength of the main body part 20 is less than the strength of the connection part 10 .
  • the main part 20 can be made of a material with lower hardness and lower strength than the connecting part 10 , that is, the main part 20 and the connecting part 10 can also be made of different materials. Processed. At this time, the main body part 20 is more easily deformed, and unlike the connection part 10 connected to one side surface of the battery unit 200, the main body part 20 is bridged between the connection parts 10 on both sides, that is, there is no support underneath the main body part 20. The combination of factors allows the main body 20 to deform first when the battery unit 200 is affected by vibration, which can absorb the relative vibration between adjacent battery units 200 and is not easily broken, thereby eliminating vibration while maintaining electrical connection. influence on the connection between the connecting part 10 and the battery unit 200 , thereby ensuring the overall stability of the electrical connection between the battery units 200 .
  • the main body part 20 and the connecting part 10 are welded.
  • the main part 20 and the connecting part 10 can be connected by welding.
  • the main part 20 and the connecting part can be connected by welding.
  • the parts 10 can be arranged in the same plane, and the edges that need to be connected are butted and then welded and fixed, thereby reducing the overall thickness of the bus component 100, further saving space, and ensuring smooth electrical connections.
  • the connecting portion 10 and the main body portion 20 are at least partially overlapped.
  • connection portion 10 and the main body portion 20 can also be partially overlapped and connected and fixed through the overlapping portion.
  • the form of connection and fixation can be by drilling holes in the overlapping partial areas and fixing them with fasteners, bonding, hot pressing, or welding in the overlapping partial areas.
  • This application There is no specific limitation on this. Using overlapping partial areas for connection and fixation can further make the connection between the main body part 20 and the connection part 10 more stable and reliable.
  • the connecting part 10 is provided with a first fixing hole 13
  • the main body part 20 is provided with a second fixing hole 22
  • the confluence member 100 further includes a fastener 30 , and the first fixing hole 13 and the second fixing hole 22 pass through
  • the fastener 30 cooperates to connect and fix the connecting part 10 with the main body part 20, and/or one of the main part 20 and the connecting part 10 is provided with a protruding end 40 and the other is provided with a connecting hole 50
  • the member 100 also includes a limiting piece 60 , and the protruding end 40 passes through the connecting hole 50 and cooperates with the limiting piece 60 to connect and fix the connecting part 10 with the main body part 20 .
  • FIG. 7 is a schematic structural diagram of the bus component of some embodiments of the present application
  • FIG. 8 is an exploded view of the bus component shown in FIG. 7
  • the connection part 10 and the main body part 20 in the bus member 100 have a partial overlapping area
  • the first fixing hole 13 and the second fixing hole 22 can be respectively opened in the overlapping arrangement area of the connecting part 10 and the main body part 20 so that the two fixing holes are aligned in the thickness direction Y.
  • the connecting portion 10 and the main body portion 20 can be connected and fixed by passing the fasteners 30 through the two fixing holes and locking them.
  • the fasteners 30 may be screws and nuts.
  • the embodiment of the present application does not specifically limit the shapes of the first fixing hole 13 and the second fixing hole 22, and they can be in the form of round holes, square holes, triangular holes, etc., and can be adjusted accordingly according to the shape of the holes.
  • the shape of the fastener 30 only needs to match the shape of the final two fixing holes and the fastener 30 .
  • FIG. 9 is a schematic structural diagram of the bus component of some embodiments of the present application
  • FIG. 10 is an exploded view of the bus component shown in FIG. 9
  • one of the connecting part 10 and the main body part 20 may be provided with a connecting hole 50, and the other may be provided with a protruding end 40, and the protruding end 40 is close to the former from the overlapping area of the latter.
  • the protruding end 40 and the connecting hole 50 are arranged facing each other in the thickness direction Y, so that the protruding end 40 can pass through the connecting hole 50 during assembly, and the After the protruding end 40 passes through the connecting hole 50 , the exposed portion cooperates with the limiting member 60 , so that the connecting portion 10 and the main body portion 20 can be connected and fixed.
  • the outer circumferential surface of the protruding end 40 can be provided with threads, and the limiting member 60 can be a nut; or the protruding end 40 can be a fixed pin, and the limiting member 60 can be a buckle; or, the protruding end 40 can be a fixing pin, and the limiting member 60 can be a buckle;
  • the end 40 may be provided with a through hole extending parallel to the plane of the connecting portion 10 , and the limiting member 60 may be a positioning pin and pass through the aforementioned through hole.
  • the specific connection method is not specifically limited in this application.
  • the two can also be connected by drilling holes and using fasteners or limiters.
  • This type of connection method is simple and the structure is stable. And easy to implement.
  • FIG. 11 is a schematic structural diagram of the bus component of some embodiments of the present application
  • FIG. 12 is an exploded view of the bus component shown in FIG. 11 .
  • the connecting part 10 and the main part 20 are riveted.
  • connection part 10 and the main body part 20 in the busbar member 100 have a partial overlapping area
  • the connection part 10 and the main body part 20 may also be riveted, and the connection part 10 and the main body part 20 may be separately connected in the overlapping area.
  • Riveting holes are provided, and rivets are passed through both riveting holes at the same time, and force is applied to make the rivets form nail heads, so that the connecting part 10 and the main body part 20 are stacked and fixedly connected together.
  • the rivet can also be fixedly connected to one of the connecting portion 10 and the main body 20 in advance, and then pass through the other one. The pre-made holes finally form the nail heads.
  • the riveting process equipment is simple, and the connection is strong and resistant to earthquakes and impacts. Therefore, it is frequently used in situations where vibration loads are received.
  • Using riveting to connect the main part 20 and the connecting part 10 can provide a stable and reliable connection relationship, and the cost is low.
  • the present application provides a battery 2000, which includes a plurality of battery cells 200 and the bus member 100 in the above embodiment. Adjacent battery cells 200 are electrically connected through the bus member 100. .
  • each battery unit 200 may include one or more battery cells.
  • each battery core is electrically connected to the connecting portion 10 , and a main body portion 20 is provided between two adjacent battery units 200 to connect the connecting portions 10 on both sides.
  • the number of cells in each battery unit 200 may be the same or different, and the length of the connection part 10 and the location of the connection area 11 may be changed accordingly, which is not specifically limited in this application.
  • the plurality of battery units 200 in the battery 2000 can be arranged extending in the same direction, extending along a fold line, or arranged in multiple rows, columns, etc., where the extension direction of the connecting portion 10 needs to be consistent with the connected battery unit 200 itself.
  • the extension direction remains consistent, and the extension direction of the main body 20 is set according to the relative position between adjacent battery units 200, and the circuit design is planned according to the output power or output voltage requirements.
  • the battery 2000 provided in the embodiment of the present application may also include an isolation plate.
  • the isolation plate may be arranged on the same layer as the bus component 100 , that is, between the upper cover of the battery box and the plurality of battery units 200 .
  • the isolation plate is made of insulating material, and is provided with a plurality of holes with the same shape as the bus components 100.
  • the present application also provides an electrical device, which includes the battery 2000 provided in the embodiment of the second aspect.
  • the battery 2000 can be used as a driving power source or a control power source of the electrical device 1000. .
  • the bus component 100 provided by the embodiment of the present application may include two spaced apart connecting parts 10 and a main body part 20 connected between the two connecting parts 10, wherein the main body part 20 and the two connecting parts 10 are respectively There is provision for at least partial area overlap, and it is possible to weld connections in the overlapping areas.
  • the hardness of the main body part 20 in the bus member 100 is lower than the hardness of the connecting part 10, and the main body part 20 can deform when subjected to vibration perpendicular to the overlapping direction. This can prevent the main body part 20 from being broken by vibration, and effectively improves the bus component. 100% connection reliability.
  • the main body part 20 may have a recessed part 21. When the bus member 100 is connected between the battery units 200, the recessed part 21 is recessed in a direction close to the battery unit 200. The elasticity formed by the recessed part 21 and the main body part 20 are utilized. Less hard materials absorb vibration more effectively without breaking.

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Abstract

本申请公开了一种汇流构件、电池及用电装置。本申请实施例的汇流构件具有预定的长度以及厚度，汇流构件在自身长度方向包括交替分布的连接部以及主体部，主体部在长度方向的两侧分别连接有连接部，连接部包括与电池单元电连接的连接区，在汇流构件的厚度方向，主体部至少部分凹陷设置且在预设应力下能够产生形变，用于吸收厚度方向上的振动。本申请实施例提供的汇流构件能够改善振动导致电池单元之间的连接受损、断裂的问题。

Description

汇流构件、电池及用电装置
相关申请的交叉引用
本申请要求享有于2022年05月12日提交的名称为“汇流构件、电池及用电装置”的中国专利申请202221127326.7的优先权，该申请的全部内容通过引用并入本文中。
技术领域
本申请涉及电池技术领域，特别是涉及一种汇流构件、电池及用电装置。
背景技术
在一些情况下，电池中通常包括多个电池单元，通过串、并联调整至所需的输出电压。在这样的电池中，多个电池单元之间的高压连接通常采用汇流构件来达成，汇流构件跨接于相邻且间隔设置的电池单元之间，因此，汇流构件中部的部分区域为没有支撑的悬空设置，在每个汇流构件连接的两个电池单元之间发生相对振动时，汇流构件易因为应力集中或反复受力而发生疲劳断裂，导致高压连接失效，最终影响电池的输出，降低了模组的可靠性。
因此，亟需一种能够提高电池的连接可靠性的汇流构件及相应的电池和用电装置。
发明内容
本申请提供一种汇流构件、电池及用电装置，其能吸收在层叠方向上的振动，改善汇流构件的疲劳断裂问题。
第一方面，本申请提供一种汇流构件，用于连接电池单元，其具有预定的长度以及厚度，汇流构件在自身长度方向包括交替分布的连接部以及主体部，主体部在长度方向的两侧分别连接有连接部，连接部包括与电池单元电连接的连接区，在汇流构件的厚度方向，主体部至少部分凹陷设置且在预设应力下能够产生形变，用于吸收厚度方向上的振动。
本申请实施例提供的技术方案中，将用于在电池单元之间形成电连接的汇流构件设置为包括沿自身长度方向交替设置的连接部和主体部，其中连接部与电池单元连 接设置，主体部则跨接于相邻的电池单元之间，将两侧的电池单元导通，在汇流构件自身厚度方向上，主体部具有凹陷设置的部分区域，由此能够使主体部具有一定的弹性，同时主体部能够在应力集中的作用下相应地产生形变，以吸收在厚度方向上的振动。当两侧的连接部所连接的电池单元之间产生沿厚度方向的相对振动时，主体部能够产生形变并通过形变以及凹陷部的弹性将振动吸收，以避免主体部产生疲劳断裂，提高汇流构件整体连接的可靠性。
在一些实施例中，主体部与连接部的材质相同，且主体部与连接部一体成型设置。本申请实施例中的汇流构件可以为采用相同的材质、由整块材料一体成型地制作而成，可以简化工艺流程、降低工艺成本。
在一些实施例中，连接部包括多层沿厚度方向层叠设置的连接层。通过采用多层材料压合形成连接部能够提高连接部的强度，使其与电池单元之间的连接更加可靠。
在一些实施例中，连接部包括加强镀层，加强镀层至少部分设置于连接区。本申请实施例中的汇流构件还可以为采用在与电池单元连接的部分区域制作镀层的方法来提高该区域的强度，使得电连接可靠。
在一些实施例中，主体部的强度小于连接部的强度。与连接部相比，主体部可以采用硬度更低、强度更小的材料，由此更便于主体部吸收振动，而不会对连接部造成影响。
在一些实施例中，主体部与连接部焊接连接。在主体部强度低于连接部的实施例中，主体部与连接部之间可以为通过焊接连接，以使其连接稳固，且不影响电流导通。
在一些实施例中，厚度方向上，连接部与主体部至少部分重叠设置。除对接并焊接之外，连接部与主体部还可以部分重叠设置，以通过重叠部分进行连接固定，使得连接更加稳固。
在一些实施例中，连接部设置有第一固定孔，主体部设置有第二固定孔，汇流构件还包括紧固件，第一固定孔与第二固定孔通过紧固件配合，以使连接部与主体部连接固定，和/或，主体部和连接部中的一者设置有凸出端且另一者设置有连接孔，汇流构件还包括限位件，凸出端穿过连接孔并与限位件配合，以使连接部与主体部连接固定。在连接部和主体部部分重叠设置的实施例中，这两者还可以为通过打孔并使用紧固件或限位件进行连接，该连接方法简单、结构稳定且便于实施。
在一些实施例中，连接部与主体部铆接。连接部与主体部还可以为通过铆钉固 定连接，该连接方法稳定性高且成本较低。
第二方面，本申请提供了一种电池，其包括多个电池单元和上述实施例中的汇流构件，相邻的电池单元之间通过汇流构件电连接。
第三方面，本申请提供了一种用电装置，包括第二方面实施例中提供的电池。
上述说明仅是本申请技术方案的概述，为了能够更清楚了解本申请的技术手段，而可依照说明书的内容予以实施，并且为了让本申请的上述和其它目的、特征和优点能够更明显易懂，以下特举本申请的具体实施方式。
附图说明
通过阅读对下文优选实施方式的详细描述，各种其他的优点和益处对于本领域普通技术人员将变得清楚明了。附图仅用于示出优选实施方式的目的，而并不认为是对本申请的限制。而且在全部附图中，用相同的附图标号表示相同的部件。在附图中：
图1为本申请一些实施例提供的车辆的结构示意图；
图2为本申请一些实施例提供的电池的爆炸示意图；
图3为图2所示的电池的局部结构示意图；
图4为本申请一些实施例的汇流构件的结构示意图；
图5为图4所示汇流构件的爆炸图；
图6为本申请一些实施例的汇流构件的爆炸图；
图7为本申请一些实施例的汇流构件的结构示意图；
图8为图7所示汇流构件的爆炸图；
图9为本申请一些实施例的汇流构件的结构示意图；
图10为图7所示汇流构件的爆炸图；
图11为本申请一些实施例的汇流构件的结构示意图；
图12为图11所示汇流构件的爆炸图。
具体实施方式中的附图标号如下：
1000-车辆；2000-电池；3000-控制器；4000-马达；
100-汇流构件，200-电池单元；300-箱体；
10-连接部；20-主体部；30-紧固件；40-凸出端；50-连接孔；60-限位件；70-第一箱体部；80-第二箱体部；90-容纳空间；
11-连接区；12-连接层；13-第一固定孔；21-凹陷部；22-第二固定孔；
X-长度方向；Y-厚度方向。
具体实施方式
下面将结合附图对本申请技术方案的实施例进行详细的描述。以下实施例仅用于更加清楚地说明本申请的技术方案，因此只作为示例，而不能以此来限制本申请的保护范围。
除非另有定义，本文所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同；本文中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本申请；本申请的说明书和权利要求书及上述附图说明中的术语“包括”和“具有”以及它们的任何变形，意图在于覆盖不排他的包含。
在本申请实施例的描述中，技术术语“第一”“第二”等仅用于区别不同对象，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量、特定顺序或主次关系。在本申请实施例的描述中，“多个”的含义是两个以上，除非另有明确具体的限定。
在本文中提及“实施例”意味着，结合实施例描述的特定特征、结构或特性可以包含在本申请的至少一个实施例中。在说明书中的各个位置出现该短语并不一定均是指相同的实施例，也不是与其它实施例互斥的独立的或备选的实施例。本领域技术人员显式地和隐式地理解的是，本文所描述的实施例可以与其它实施例相结合。
在本申请实施例的描述中，术语“和/或”仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
在本申请实施例的描述中，术语“多个”指的是两个以上(包括两个)，同理，“多组”指的是两组以上(包括两组)，“多片”指的是两片以上(包括两片)。
在本申请实施例的描述中，技术术语“中心”“纵向”“横向”“长度”“宽度”“厚度”“上”“下”“前”“后”“左”“右”“竖直”“水平”“顶”“底”“内”“外”“顺时针”“逆时针”“轴向”“径向”“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请实施例和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请实施例的限制。
在本申请实施例的描述中，除非另有明确的规定和限定，技术术语“安装”“相连”“连接”“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；也可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请实施例中的具体含义。
在电池领域中，动力电池的应用规模逐渐增大，广泛应用于发电站的能源储存系统、交通工具的动力源乃至航空航天机械等领域中，由此，市场中对动力电池的需求量也在逐渐增大。为了达到一定的输出功率或输出电压，在一些情况下，电池通常是由多个串联或并联的电池单元连接组成的，这些电池单元之间进行高压连接时通常需要用到汇流构件进行电连接。
本申请的发明人注意到，在电池的使用过程中，当电池受到外界环境影响而产生了振动时，相邻的电池单元或相邻的电池的振动幅度之间通常具有一定的差异，导致相邻的电池单元或相邻的电池之间产生相对振动，而考虑到电池单元的安装方向，该相对振动通常是沿汇流构件自身厚度方向的相对振动。在此基础上，相邻的电池单元或电池之间通常设置有一定的间隙以形成膨胀余量，此时汇流构件的中部对应该间隙的部分区域就形成了跨接于两侧、下方无支撑的结构，且为了形成电连接，汇流部件通常采用耐磨损的硬质金属材料，该部分跨接的汇流构件受到前述相对振动施加的作用力后，易由于应力反复集中而导致疲劳断裂，最终出现高压采样失效的问题。
基于以上考虑，为了解决电池使用过程中汇流构件受应力导致断裂的问题，本申请的发明人提出一种汇流构件及相应的电池，通过改变汇流构件自身的硬度来吸收其两端在自身厚度方向上的相对振动，从而改善汇流构件疲劳断裂的问题。
本申请实施例描述的技术方案适用于电池以及使用该电池的用电装置。
其中的用电装置可以是车辆、手机、便携式设备、笔记本电脑、轮船、航天器、电动玩具和电动工具等等。车辆可以是燃油汽车、燃气汽车或新能源汽车，新能源汽车可以是纯电动汽车、混合动力汽车或增程式汽车等；航天器包括飞机、火箭、航天飞机和宇宙飞船等等；电动玩具包括固定式或移动式的电动玩具，例如，游戏机、电动汽车玩具、电动轮船玩具和电动飞机玩具等等；电动工具包括金属切削电动工具、研磨电动工具、装配电动工具和铁道用电动工具，例如，电钻、电动砂轮机、电动扳手、电动螺丝刀、电锤、冲击电钻、混凝土振动器和电刨等等。本申请实施例对上述用电装置不做特殊限制。
可以理解的是，本申请实施例公开的电池可以但不限用于前述车辆、船舶或飞行器等用电装置中。可以使用具备本申请公开的汇流构件、电池等组成该用电装置的电源系统，这样，能够在频繁振动的较恶劣环境中提供可靠的电连接关系以及相应可靠的电源。在此基础上，本申请以下实施例以及附图中以将该汇流构件设置于相邻的电池单元之间为例进行说明，但应理解本申请并不限于此，还可以将本申请实施例提供的汇流构件应用于其他具有相对振动且需要进行电连接的场合，并一同对其进行保护。
以下实施例为了方便说明，以用电装置为车辆为例进行说明。
图1为本申请一些实施例提供的车辆的结构示意图。如图1所示，车辆1000的内部设置有电池2000，电池2000可以设置在车辆1000的底部或头部或尾部。电池2000可以用于车辆1000的供电，例如，电池2000可以作为车辆1000的操作电源。
车辆1000还可以包括控制器3000和马达4000，控制器3000用来控制电池2000为马达4000供电，例如，用于车辆1000的启动、导航和行驶时的工作用电需求。
在本申请一些实施例中，电池2000不仅仅可以作为车辆1000的操作电源，还可以作为车辆1000的驱动电源，代替或部分地代替燃油或天然气为车辆1000提供驱动动力。
图2为本申请一些实施例提供的电池的爆炸示意图，图3为图2所示的电池的局部结构示意图，图4为本申请一些实施例的汇流构件的结构示意图。
如图2至图4所示，电池2000可以包括箱体300、电池单元200、汇流构件100，汇流构件100用于将至少两个电池单元200电连接，汇流构件100具有连接部10和主体部20，连接部10与电池单元200电连接。
可选地，箱体300用于容纳电池单元，箱体300可以是多种结构。在一些实施例中，箱体300可以包括第一箱体部70和第二箱体部80，第一箱体部70与第二箱体部80相互盖合，第一箱体部70和第二箱体部80共同限定出用于容纳电池单元200的容纳空间90。第二箱体部80可以是一端开口的空心结构，第一箱体部70为板状结构，第一箱体部70盖合于第二箱体部80的开口侧，以形成具有容纳空间90的箱体300；第一箱体部70和第二箱体部80也均可以是一侧开口的空心结构，第一箱体部70的开口侧盖合于第二箱体部80的开口侧，以形成具有容纳空间90的箱体300。当然，第一箱体部70和第二箱体部80可以是多种形状，比如，圆柱体、长方体等。
为提高第一箱体部70与第二箱体部80连接后的密封性，第一箱体部70与第 二箱体部80之间也可以设置密封件，比如，密封胶、密封圈等。
假设第一箱体部70盖合于第二箱体部80的顶部，第一箱体部70亦可称之为上箱盖，第二箱体部80亦可称之为下箱体。
可选地，在电池2000中，电池单元200可以是多个。若电池单元200为多个，多个电池单元200之间可串联或并联或混联，混联是指多个电池单元200中既有串联又有并联。多个电池单元200之间可直接串联或并联或混联在一起，当然，也可以是多个电池单元200先串联或并联或混联组成电池模组，多个电池模组再串联或并联或混联形成一个整体，并容纳于箱体300内。
在一些实施例中，如图2、图3所示，电池单元200为多个，多个电池单元200先串联或并联或混联组成电池模组。多个电池模组再串联或并联或混联形成一个整体。
电池模组中的多个电池单元200之间可通过汇流构件100实现电连接，以实现电池模组中的多个电池单元200的并联或串联或混联。汇流构件100可为一个或多个，各汇流构件100用于将至少两个电池单元200电连接。
请一并参阅图3至图5，图3为图2所示的电池的局部结构示意图，图4为本申请一些实施例的汇流构件的结构示意图，图5为图4所示汇流构件的爆炸图。
本申请提供一种汇流构件100，用于连接电池单元200，其具有预定的长度以及厚度，汇流构件100在自身长度方向X包括交替分布的连接部10以及主体部20，主体部20在长度方向X的两侧分别连接有连接部10，连接部10包括与电池单元200电连接的连接区11，在汇流构件100的厚度方向Y，主体部20至少部分凹陷设置且在预设应力下能够产生形变，用于吸收厚度方向Y上的振动。
本申请实施例提供的汇流构件100架设于电池单元200之间，且汇流构件100中包括交替分布的连接部10和主体部20，其中连接部10用于与电池单元200的电芯电连接，主体部20则连接于相邻的两个连接部10之间并将两个连接部10导通，使得电池单元200之间形成所需的电连接。每个连接部10中包括至少一个与电池单元200进行电连接的连接区11，该连接区11可以为与电池单元200的极柱焊接连接，此时对连接区11的强度具有一定的要求。同时，主体部20跨过相邻两个电池单元200之间的空隙区，并桥接于分别与前述两个电池单元200相连接的连接部10之间。
本申请实施例中的主体部20采用硬度较低的材质制成，由此能够在两侧的电池单元200之间发生相对振动时，即主体部20两侧的连接部10之间发生相对振动时，汇流构件100可能会受到超过预设大小的应力，此时由主体部20首先随之发生形 变，改善振动产生的应力集中于未受到支撑的主体部20某处并导致主体部20断裂的问题，同时也能够减小相对振动对连接部10造成的影响，从而保证连接部10与电池单元200之间的连接稳定可靠，提高电池2000整体的可靠性，使其能够在频繁振动的较恶劣环境下正常工作。作为一种示例，主体部20可以采用导电性高、质软、不易腐蚀的材料制成，例如，主体部20可以为软铝片，但应理解本申请并不限于此。
在此基础上，主体部20还设置有沿自身厚度方向凹陷的凹陷部21，可选地，凹陷部21向靠近电池单元200的方向凹陷，即凹陷部21位于相邻两个电池单元200之间的空隙区内，由此能够节省设置汇流构件100和电池单元200的空间。通过设置凹陷部21能够使得主体部20具有一定的弹性和缓冲作用，在主体部20受到外界应力时，可以通过凹陷部21的底部与侧壁的角度变化首先吸收一定的应力，在所受的应力超过预设值时，由于材质较软，主体部20会产生进一步的形变而不会发生断裂。由本身材质与凹陷部21结构的组合作用，可以有效地提高主体部20能够承受的应力作用上限，进一步增加连接的可靠性。
可以理解的是，本申请实施例中的每个汇流构件100中可以包括多个连接部10和多个主体部20，其中的连接部10可以根据需要连接的电池单元20的位置及数量进行设计，只需保证每个主体部20在长度方向X上的两侧均设置有连接部10即可，即可以存在多个相邻设置的连接部10。同时，在设置有多个连接部10和多个主体部20的实施例中，这些连接部10和主体部20可以为均沿同一方向交替延伸设置，也可以根据需要进行连接的电池单元200之间的相对位置使汇流构件100的延伸方向相应地拐折或偏移。
在此基础上，本申请在以下实施例及附图中以相邻设置的两个电池单元200之间连接设置有两个连接部10、一个主体部20的结构为示例进行说明，但应理解本申请并不限于此。
在一些实施例中，主体部20与连接部10的材质相同，且主体部20与连接部10一体成型设置。
本申请实施例中的汇流构件100可以为整体采用相同的材质制成，由此能够将连接部10和主体部20使用完整地、一体成型地制作而成。即连接部10和主体部20可以整体采用硬度较低、能够在预设大小的应力下发生形变的材料一体成型地制作而成，由此能够省去将连接部10与主体部20进行连接所需的工序，从而节约成本。
在此实施例中需要注意的是，汇流构件100由连接部10和主体部20构成，其中连接部10与电池单元200进行连接，通常情况下，该连接方式可以为焊接。受限于 焊接条件的要求，此时的连接部10需要具有一定的强度和一定的尺寸，即连接部10需要符合焊接加工的前置条件，由此才能够与电池单元200形成稳定的连接，因此，在挑选连接部10的材料时需要保证用于一体成型的材料本身的强度。
请参阅图6，图6为本申请一些实施例的汇流构件的爆炸图。在一些实施例中，连接部10包括多层沿厚度方向Y层叠设置的连接层12。
如前所述地，汇流构件100中的连接部10需要与电池单元200进行电连接，该连接可以通过焊接的方式达成，因此对连接部10本身的强度具有一定的要求。在连接部10与主体部20共同采用硬度较低的材料一体成型的实施例中，连接部10自身的材质可能无法达到所需的焊接条件，此时可以采用对连接部10进行强化的手段提高其整体强度，例如，可以将连接部10设置为通过采用多层材料压合而成，即设置多层连接层12，并将多层连接层12压合形成连接部10，以提高连接部10的强度，使其与电池单元200之间的连接更加稳固可靠。
可以理解的是，多层连接层12的轮廓形状及大小可以相同，当然也可以不同，在将多层连接层12进行连接时，应当首先保证连接区11的位置层叠设置有最多层的连接层12，以首先将连接区11的强度提高到达到与电池单元200进行连接的标准。可选地，当多层连接层12的形状不相同时，每两层相邻的连接层12中，远离电池单元200的连接层12在靠近电池单元200的连接层12上的正投影轮廓可以位于后者的轮廓内，即沿着靠近电池单元200的方向，连接层12的面积可以为逐渐增大，以首先保证与电池单元200之间的连接稳固。
可以理解的是，在连接部10包括多层层叠设置的连接层12的实施例中，主体部20也可以相应地为多层层叠设置构成，即采用多层较薄的层结构热压加工而成，此时主体部20中薄层的层数与连接部10中连接层12的层数可以相同或不同，只需保证主体部20整体的硬度能够使其在发生沿厚度方向Y的振动时产生形变而非断裂即可，本申请对此不做特定的限定。
在一些实施例中，连接部10包括加强镀层，加强镀层至少部分设置于连接区11。
本申请实施例中的汇流构件100还可以为采用制作加强镀层的方法来提高连接部10的强度，同时，根据加强镀层的材料还能够相应提高连接部10的耐磨性和抗腐蚀性等参数。加强镀层可以为覆盖整个连接部10设置，或者，加强镀层也可以为仅设置于连接区11，以提高连接区11的强度，使其能够进行焊接连接，并提高电连接的可靠性。可选地，加强镀层的材料可以为锡、铬、镍或锌等耐腐蚀的金属材料。
在一些实施例中，主体部20的强度小于连接部10的强度。
在本申请实施例提供的汇流构件100中，与连接部10相比，主体部20可以采用硬度更低、强度更小的材料，即主体部20和连接部10也可以为采用不同的材料分别加工制成。此时主体部20更容易变形，且与连接于电池单元200一侧表面的连接部10不同，主体部20桥接于两侧的连接部10之间，即主体部20下方无支撑，这两种因素相结合，使得在电池单元200受到震动影响时，主体部20首先发生形变，能够将相邻电池单元200之间的相对振动吸收且不易断裂，由此能够在保持电连接的前提下消除振动对连接部10与电池单元200之间的连接的影响，从而保证电池单元200之间电连接的整体稳定性。
在一些实施例中，主体部20与连接部10焊接连接。
在本申请的汇流构件100中的连接部10和主体部20为采用不同材质分别加工制成的实施例中，主体部20和连接部10之间可以采用焊接连接，此时主体部20与连接部10可以为设置于同一平面内，并将需要进行连接的边缘对接，随后进行焊接固定，由此能够减小汇流构件100整体的厚度，进一步节省空间，同时也能够保证电连接的顺畅。
在一些实施例中，厚度方向Y上，连接部10与主体部20至少部分重叠设置。
与前述对接并焊接的连接方式相对应地，连接部10与主体部20也可以为部分重叠设置，并通过重叠部分进行连接固定。例如，连接固定的形式可以为通过在重叠设置的部分区域打孔并使用紧固件固定，可以为粘接、热压，或者，还可以为在重叠设置的部分区域进行焊接等方式，本申请对此不作特定的限定。利用重叠设置的部分区域进行连接固定，能够进一步使得主体部20与连接部10之间的连接更加稳定可靠。
在一些实施例中，连接部10设置有第一固定孔13，主体部20设置有第二固定孔22，汇流构件100还包括紧固件30，第一固定孔13与第二固定孔22通过紧固件30配合，以使连接部10与主体部20连接固定，和/或，主体部20和连接部10中的一者设置有凸出端40且另一者设置有连接孔50，汇流构件100还包括限位件60，凸出端40穿过连接孔50并与限位件60配合，以使连接部10与主体部20连接固定。
请一并参阅图7和图8，图7为本申请一些实施例的汇流构件的结构示意图，图8为图7所示汇流构件的爆炸图。在汇流构件100中的连接部10和主体部20具有部分重叠区域的实施例中，如前所述地，连接部10和主体部20之间可以存在多种连接方法。作为一些可选的示例，可以在连接部10的重叠设置区域和主体部20的重叠设 置区域中分别开设第一固定孔13和第二固定孔22，并使得这两个固定孔在厚度方向Y上正对设置，再将紧固件30同时穿过这两个固定孔并锁紧即可将连接部10与主体部20连接固定。示例性地，其中的紧固件30可以为螺钉和螺母。
可以理解的是，本申请实施例对第一固定孔13、第二固定孔22的形状不做特定的限定，可以为圆孔、方孔、三角孔等形式，并根据孔的形状相应调整紧固件30的形状，只需最终两个固定孔和紧固件30的形状能够相匹配即可。
请一并参阅图9和图10，图9为本申请一些实施例的汇流构件的结构示意图，图10为图9所示汇流构件的爆炸图。作为另一些可选的示例，连接部10和主体部20中可以为一者设置有连接孔50，另一者设置有凸出端40，该凸出端40由后者的重叠区域中靠近前者的一侧表面起始，向靠近前者的方向凸出设置，且凸出端40和连接孔50在厚度方向Y上正对设置，使得组装时凸出端40能够穿过连接孔50，并将凸出端40穿过连接孔50后暴露在外的部分与限位件60相配合，即可将连接部10与主体部20连接固定。
示例性地，凸出端40的外周面可以设置有螺纹，同时限位件60可以为螺母；或者，凸出端40可以为固定销，同时限位件60可以为卡扣；或者，凸出端40上可以设置有与连接部10所在平面平行延伸的贯穿孔，同时限位件60可以为定位销并穿过前述贯穿孔，本申请对具体连接方式不作特定的限定。
综上所述，在连接部10和主体部20部分重叠设置的实施例中，这两者还可以为通过打孔并使用紧固件或限位件进行连接，该类连接方法简单、结构稳定且便于实施。
请一并参阅图11和图12，图11为本申请一些实施例的汇流构件的结构示意图，图12为图11所示汇流构件的爆炸图。在一些实施例中，连接部10与主体部20铆接。
在汇流构件100中的连接部10和主体部20具有部分重叠区域的实施例中，连接部10与主体部20之间还可以为铆接，可以在连接部10和主体部20的重叠区域中分别设置铆接孔，并将铆钉同时穿过二者上的铆接孔，再施加作用力使得铆钉形成钉头，将连接部10和主体部20层叠固定连接在一起。可以理解的是，与前述凸出端40、连接孔50的设置方法相类似地，铆钉也可以为预先与连接部10及主体部20之中的一者固定连接，再穿过另一者上的预制孔，最后形成钉头。
铆接工艺设备简单，且连接牢固抗震、耐冲击，因此频繁应用于接受振动载荷的场合中，采用铆接的方法连接主体部20和连接部10能够提供稳定可靠的连接关 系，且成本较低。
请再次参阅图2，第二方面，本申请提供了一种电池2000，其包括多个电池单元200和上述实施例中的汇流构件100，相邻的电池单元200之间通过汇流构件100电连接。
本申请实施例还提供一种电池2000，其中包括多个如前所述的电池单元200，可以理解的是，每个电池单元200中可以包括有一个或多个电芯，当电池单元200中包括多个电芯时，每个电芯均与连接部10电连接，同时在相邻两个电池单元200之间设置主体部20以将两侧的连接部10导通。每个电池单元200中的电芯数量可以相同，也可以不同，只需相应改变连接部10的长度以及连接区11的设置位置即可，本申请对此不作特定的限定。同时，电池2000中的多个电池单元200可以为沿同一方向延伸排列、沿折线延伸排列或排成多行、多列等，其中连接部10的延伸方向需要与其所连接的电池单元200自身的延伸方向保持一致，同时主体部20的延伸方向则根据相邻电池单元200之间的相对位置进行设置，并根据输出功率或输出电压的需求规划电路设计。
同时，本申请实施例提供的电池2000还可以包括隔离板，隔离板可以与汇流构件100同层设置，即设置于电池箱体的上盖与多个电池单元200之间。此时，隔离板采用绝缘材质，且其中设置有多个与汇流构件100形状相同的孔，在对电池2000进行加工时，可以先将多个汇流构件100按照预设位置全部嵌设于隔离板中，再将隔离板统一与多个电池单元200中的多个电芯进行焊接连接，由此能够有效提高生产效率，且能够减小焊接时的对位误差。
请再次参阅图1，本申请还提供一种用电装置，其中包括第二方面实施例中提供的电池2000，如前所述地，该电池2000可以作为用电装置1000的驱动电源或控制电源。
示例性地，本申请实施例提供的汇流构件100可以为包括两个间隔设置的连接部10以及连接于两个连接部10之间的主体部20，其中主体部20与两个连接部10分别存在至少部分区域重叠设置，并可以为在重叠区域焊接连接。汇流构件100中的主体部20的硬度低于连接部10的硬度，且主体部20能够在受到垂直于重叠方向的振动时发生形变，由此能够避免主体部20受振动断裂，有效提高汇流构件100进行连接的稳定可靠性。进一步地，主体部20可以为具有凹陷部21，当汇流构件100连接于电池单元200之间时，凹陷部21向靠近电池单元200的方向凹陷设置，利用凹陷部21形成的弹性以及主体部20硬度较低的材质能够更有效地吸收振动而不断裂。
最后应说明的是：以上各实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述各实施例对本申请进行了详细的说明，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申请各实施例技术方案的范围，其均应涵盖在本申请的权利要求和说明书的范围当中。尤其是，只要不存在结构冲突，各个实施例中所提到的各项技术特征均可以任意方式组合起来。本申请并不局限于文中公开的特定实施例，而是包括落入权利要求的范围内的所有技术方案。

Claims (11)

  1. 一种汇流构件，用于连接电池单元，所述汇流构件具有预定的长度以及厚度，所述汇流构件在自身长度方向包括交替分布的连接部以及主体部，所述主体部在所述长度方向的两侧分别连接有所述连接部，所述连接部包括与所述电池单元电连接的连接区，在所述汇流构件的厚度方向，所述主体部至少部分凹陷设置且在预设应力下能够产生形变，用于吸收所述厚度方向上的振动。
  2. 根据权利要求1所述的汇流构件，其中，所述主体部与所述连接部的材质相同，且所述主体部与所述连接部一体成型设置。
  3. 根据权利要求1或2所述的汇流构件，其中，所述连接部包括多层沿所述厚度方向层叠设置的连接层。
  4. 根据权利要求1至3任意一项所述的汇流构件，其中，所述连接部包括加强镀层，所述加强镀层至少部分设置于所述连接区。
  5. 根据权利要求1所述的汇流构件，其中，所述主体部的强度小于所述连接部的强度。
  6. 根据权利要求5所述的汇流构件，其中，所述主体部与所述连接部焊接连接。
  7. 根据权利要求5所述的汇流构件，其中，在所述厚度方向上，所述连接部与所述主体部至少部分重叠设置。
  8. 根据权利要求7所述的汇流构件，其中，所述连接部设置有第一固定孔，所述主体部设置有第二固定孔，所述汇流构件还包括紧固件，所述第一固定孔与所述第二固定孔通过所述紧固件配合，以使所述连接部与所述主体部连接固定；
    和/或，所述主体部和所述连接部中的一者设置有凸出端且另一者设置有连接孔，所述汇流构件还包括限位件，所述凸出端穿过所述连接孔并与所述限位件配合，以使所述连接部与所述主体部连接固定。
  9. 根据权利要求7所述的汇流构件，其中，所述连接部与所述主体部铆接。
  10. 一种电池，其中，包括多个电池单元和如权利要求1至9中任一项所述的汇流构件，相邻所述电池单元之间通过所述汇流构件电连接。
  11. 一种用电装置，其中，包括如权利要求10所述的电池。
PCT/CN2022/107101 2022-05-12 2022-07-21 汇流构件、电池及用电装置 WO2023216417A1 (zh)

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CN206349433U (zh) * 2016-11-30 2017-07-21 比亚迪股份有限公司 一种电池连接片及电池模组
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