WO2023087552A1 - 一种电池、用电装置、焊偏检测装置及方法 - Google Patents

一种电池、用电装置、焊偏检测装置及方法 Download PDF

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Publication number
WO2023087552A1
WO2023087552A1 PCT/CN2022/074697 CN2022074697W WO2023087552A1 WO 2023087552 A1 WO2023087552 A1 WO 2023087552A1 CN 2022074697 W CN2022074697 W CN 2022074697W WO 2023087552 A1 WO2023087552 A1 WO 2023087552A1
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WIPO (PCT)
Prior art keywords
welding
poles
positioning hole
positions
positional relationship
Prior art date
Application number
PCT/CN2022/074697
Other languages
English (en)
French (fr)
Inventor
齐聪成
李健
曲树平
张旭
李鹏飞
李英俊
郑石雄
Original Assignee
江苏时代新能源科技有限公司
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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Publication date
Application filed by 江苏时代新能源科技有限公司 filed Critical 江苏时代新能源科技有限公司
Priority to EP22894099.5A priority Critical patent/EP4239281A4/en
Publication of WO2023087552A1 publication Critical patent/WO2023087552A1/zh
Priority to US18/337,063 priority patent/US20230330860A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
    • B25J9/00—Programme-controlled manipulators
    • B25J9/16—Programme controls
    • B25J9/1694—Programme controls characterised by use of sensors other than normal servo-feedback from position, speed or acceleration sensors, perception control, multi-sensor controlled systems, sensor fusion
    • B25J9/1697—Vision controlled systems
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
    • B25J11/00—Manipulators not otherwise provided for
    • B25J11/005—Manipulators for mechanical processing tasks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
    • B25J9/00—Programme-controlled manipulators
    • B25J9/16—Programme controls
    • B25J9/1679—Programme controls characterised by the tasks executed
    • B25J9/1687—Assembly, peg and hole, palletising, straight line, weaving pattern movement
    • 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
    • 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
    • B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
    • B23K31/12—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to investigating the properties, e.g. the weldability, of materials
    • B23K31/125—Weld quality monitoring
    • 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 embodiments of the present application relate to the technical field of battery manufacturing, and in particular to a battery, an electrical device, a welding deviation detection device and a method.
  • the embodiment of the present application provides a battery, an electrical device, a welding deviation detection device and a method, which can accurately weld the confluence component and multiple poles through the welding mechanism, and can also detect in a simple and timely manner through the post-welding detection mechanism. Welding deviation.
  • a welding deviation detection device includes a pre-welding addressing mechanism, a welding mechanism and a post-welding detection mechanism.
  • the pre-welding addressing mechanism is used to determine the relative positional relationship between the positioning hole and multiple poles in the battery, and send the relative positional relationship to the welding mechanism and the post-welding detection mechanism.
  • the positioning hole is arranged on the end plate of the battery along the first direction .
  • the welding mechanism is used to detect the first position of the positioning hole, determine the first positions of the plurality of poles based on the first position of the positioning hole and the received relative position relationship, and weld the bus assembly and the plurality of poles based on the first positions of the plurality of poles. poles to form multiple welds.
  • the post-weld detection mechanism is used to detect the second position of the positioning hole and the positions of the plurality of welding seams, and detect the welding of the bus assembly and the pole based on the second position of the positioning hole, the positions of the plurality of welding seams, and the received relative positional relationship. partial situation.
  • the pre-welding addressing mechanism can determine the relative positional relationship between the positioning hole in the battery and multiple poles, and send the relative positional relationship to the welding mechanism and the post-welding detection mechanism.
  • the welding mechanism can detect the first position of the positioning hole, and determine the first positions of multiple poles based on the first position of the positioning hole and the received relative position relationship, so the welding mechanism can accurately weld based on the first positions of multiple poles A confluence assembly with multiple poles to form multiple welds.
  • the post-weld detection mechanism can detect the second position of the positioning hole and the positions of multiple welding seams, and detect the welding deviation between the bus assembly and the pole based on the second position of the positioning hole, the positions of multiple welding seams, and the received relative positional relationship Condition.
  • the embodiment of the present application can not only accurately weld the confluence component and multiple poles through the welding mechanism, but also can detect the welding deviation in a simple and timely manner through the post-welding detection mechanism.
  • the pre-welding addressing mechanism includes a first visual camera for detecting the position of the positioning hole and the positions of the plurality of poles, and determining the relative positional relationship based on the position of the positioning hole and the positions of the plurality of poles, And send the relative positional relationship to the welding mechanism and the post-weld inspection mechanism.
  • the welding mechanism includes a second vision camera and a welding device.
  • the second visual camera is used to detect the first position of the positioning hole and receive the relative positional relationship, determine the first positions of the plurality of poles based on the first position of the positioning hole and the relative positional relationship, and compare the first positions of the plurality of poles Send to welding unit.
  • the welding device is used for receiving the first positions of the plurality of poles, and welding the bus assembly and the plurality of poles based on the first positions of the plurality of poles.
  • the second vision camera can accurately determine the first positions of the multiple poles in the welding mechanism, and the welding device can accurately weld the bus assembly and the multiple poles based on the first positions of the poles sent by the second vision camera. column to improve welding accuracy.
  • the post-weld detection mechanism includes a third vision camera for detecting the second position of the positioning hole and the positions of the plurality of welds, and receiving a relative positional relationship based on the second position of the positioning hole and the relative position The relationship determines the second positions of the plurality of poles, and detects the welding deviation between the bus assembly and the poles based on the second positions of the plurality of poles and the positions of the plurality of welding seams.
  • the third vision camera can accurately determine the second positions of the plurality of poles in the post-welding detection mechanism, and can detect the connection between the bus assembly and the poles based on the detected position of the weld seam and the second positions of the multiple poles.
  • the welding deviation of the column can be monitored to achieve a good monitoring of the welding quality.
  • the post-welding detection mechanism may also include an electronic measuring instrument for detecting the bonding gap between the pole and the bus assembly.
  • the welding quality of each pole and the bus assembly can be evaluated based on the bonding gap, so as to realize good monitoring of the welding quality.
  • a welding deviation detection method is provided, which can be applied to the welding deviation detection device in the first aspect.
  • the welding deviation detection method includes: determining the position in the battery through the pre-welding addressing mechanism The relative positional relationship between the hole and multiple poles, and send the relative positional relationship to the welding mechanism and the post-welding detection mechanism.
  • the first position of the positioning hole is detected by the welding mechanism, the first positions of the plurality of poles are determined based on the first position of the positioning hole and the received relative positional relationship, and the bus assembly and the plurality of poles are welded based on the first positions of the plurality of poles column to form multiple welds.
  • the welding deviation detection method may include: detecting the position of the positioning hole and the positions of the plurality of poles through the first visual camera, and determining the relative positional relationship based on the position of the positioning hole and the positions of the plurality of poles, And send the relative positional relationship to the welding mechanism and the post-weld inspection mechanism.
  • the welding deviation detection method may include: detecting the first position of the positioning hole and receiving the relative positional relationship through the second vision camera, and determining the positions of the plurality of poles based on the first position of the positioning hole and the relative positional relationship The first position, and send the first positions of the plurality of poles to the welding device; receive the first positions of the plurality of poles through the welding device, and weld the bus assembly and the plurality of poles based on the first positions of the plurality of poles .
  • the welding deviation detection method may include: detecting the second position of the positioning hole and the positions of the plurality of welding seams through a third visual camera, and receiving the relative positional relationship, based on the second position of the positioning hole and the relative The positional relationship determines the second positions of the multiple poles, and detects the welding deviation between the bus assembly and the poles based on the second positions of the multiple poles and the positions of the multiple welds.
  • the welding deviation detection method may include: detecting the lamination gap between the pole post and the bus assembly by using an electronic measuring instrument.
  • a battery including an end plate and a bus assembly.
  • the end plate is provided with a positioning hole along the first direction, and the positioning hole is used for positioning the poles of the plurality of battery cells.
  • the bus assembly is based on the positioning of the positioning holes and the pole welding, and the bus assembly is used to electrically connect multiple battery cells.
  • Positioning holes are set on the end plate, even if the confluence component covers multiple poles, multiple poles can be accurately positioned through the positioning holes, so as to provide a positioning reference for welding busbars and poles, which is convenient for accurate welding of confluence components and poles Pole.
  • the positioning hole can also provide a position reference for detecting the welding deviation between the bus assembly and the pole.
  • the number of positioning holes is set to two, and the two positioning holes are distributed along the second direction and the third direction, and the second direction, the third direction and the first direction are perpendicular to each other.
  • the two positioning holes can position the pole from different directions, which improves the accuracy of pole positioning.
  • a detection hole is provided at the part corresponding to the current collection assembly and the pole, and the detection hole is configured to allow detection of the bonding gap between the pole and the current collection assembly through the detection hole, and the diameter of the detection hole is 1.5 mm to 2 mm .
  • the detector it is convenient for the detector to detect the bonding gap between the pole and the bus assembly through the detection hole.
  • Setting the diameter of the detection hole to 1.5 mm to 2 mm can meet the detection requirements of the detector, and will not affect the welding quality due to the large diameter of the detection hole.
  • an electric device including the battery in the third aspect, and the battery is used to provide electric energy for the electric device.
  • FIG. 1 is a schematic structural diagram of an automobile provided in an embodiment of the present application.
  • FIG. 2 is a schematic structural diagram of a battery provided in an embodiment of the present application.
  • FIG. 3 is a schematic structural diagram of a battery cell provided in an embodiment of the present application.
  • Fig. 4 is a schematic structural diagram of another battery provided in the embodiment of the present application, wherein Fig. 4 does not show the bus assembly.
  • Fig. 5 is a schematic structural diagram of another battery provided in the embodiment of the present application, wherein Fig. 5 shows a bus assembly.
  • FIG. 6 is a schematic structural diagram of a welding deviation detection device provided in an embodiment of the present application.
  • FIG. 7 is a schematic flow chart of a welding offset detection method provided in an embodiment of the present application.
  • multiple means more than two (including two), and similarly, “multiple groups” means more than two (including two).
  • connection or “connection” of mechanical structures It may refer to a physical connection, for example, a physical connection may be a fixed connection, such as a fixed connection through a fixture, such as a fixed connection through screws, bolts or other fasteners; a physical connection may also be a detachable connection, such as Mutual clamping or clamping connection; the physical connection may also be an integral connection, for example, welding, bonding or integrally formed connection for connection.
  • connection or “connection” of the circuit structure may not only refer to a physical connection, but also an electrical connection or a signal connection, for example, it may be a direct connection, that is, a physical connection, or an indirect connection through at least one intermediate component, As long as the circuit is connected, it can also be the internal connection of two components; besides the signal connection through the circuit, the signal connection can also refer to the signal connection through the media medium, for example, radio waves.
  • bus assembly In the production process of power batteries, multiple battery cells are often assembled into a battery pack, and then the bus assembly is attached to the poles of multiple battery cells in the battery pack, and the bus assembly and the pole are welded according to the predetermined design , so as to conduct multiple poles through the bus assembly, so as to electrically connect multiple battery cells.
  • the battery pack is placed on the battery module welding positioning device, and the battery pack is positioned on the welding position by the battery module welding positioning device. Then, a cover plate is covered on the bus assembly of the battery pack on the welding position, so that the pressing cylinder on the cover plate is opposite to the pole, and a pressing force is applied to the bus assembly through the pressing cylinder, so as to press the bus assembly and the pole. tight. Afterwards, the confluence component and the pole are welded in the pressure cylinder.
  • the battery module welding positioning device of the related technology can improve the precise alignment between the pressure cylinder and the pole, so that the confluence component and the pole can be closely attached, thereby reducing welding deviation and voids when the confluence component and the pole are welded. probability of welding.
  • the cover plate pressing cylinder and the pole cannot be aligned well, resulting in low positioning accuracy, and also causing welding deviation, false positives, etc. Welding and other issues. It can be seen that the related technology can only improve the accuracy of the welding position from the positioning device, but cannot avoid the occurrence of welding deviation and cannot detect the welding condition.
  • an embodiment of the present application provides a welding deviation detection device, including: a pre-welding addressing mechanism, a welding mechanism and a post-welding detection mechanism.
  • the pre-welding addressing mechanism can determine the relative positional relationship between the positioning hole in the battery and multiple poles, and send the relative positional relationship to the welding mechanism and the post-welding detection mechanism.
  • the welding mechanism can detect the first position of the positioning hole, and determine the first positions of multiple poles based on the first position of the positioning hole and the received relative position relationship, so the welding mechanism can accurately weld based on the first positions of multiple poles A confluence assembly with multiple poles to form multiple welds.
  • the post-weld detection mechanism can detect the second position of the positioning hole and the positions of multiple welding seams, and detect the welding deviation between the bus assembly and the pole based on the second position of the positioning hole, the positions of multiple welding seams, and the received relative positional relationship Condition.
  • the embodiment of the present application can not only accurately weld the confluence component and multiple poles through the welding mechanism, but also can detect the welding deviation in a simple and timely manner through the post-welding detection mechanism.
  • the welding deviation detection device described in the embodiment of the present application can detect the welding deviation of the pole post and the bus assembly in the battery, so it is suitable for the battery and the electric device using the battery.
  • a battery refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity.
  • the battery mentioned in this application may include a battery module or a battery pack, and the like.
  • the battery mentioned in this application may be a cylindrical battery.
  • Batteries generally include a battery case for enclosing one or more battery cells. The battery box can prevent liquid or other foreign objects from affecting the charging or discharging of the battery cells.
  • Electric devices can be cars, mobile phones, portable devices, laptops, ships, spacecraft, electric toys and power tools, and so on.
  • Cars 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 airplanes, rockets, space shuttles and spacecraft, etc.
  • electric toys include fixed Type or mobile electric toys, such as game consoles, electric car toys, electric boat 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, electric planers, and more.
  • the embodiments of the present application do not impose special limitations on the above-mentioned electrical devices.
  • FIG. 1 is a schematic structural diagram of a car 00 provided by some embodiments of the present application.
  • the vehicle 00 can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc.
  • the car 00 includes a battery 1 , a controller 2 and a motor 3 .
  • the battery 1 is used to supply power to the controller 2 and the motor 3 as the operating power and driving power of the car 00 , for example, the battery 1 is used for starting, navigating and running the car 00 .
  • the battery 1 supplies power to the controller 2, and the controller 2 controls the battery 1 to supply power to the motor 3, and the motor 3 receives and uses the power of the battery 1 as the driving power of the car 00, replacing or partially replacing fuel oil or natural gas to drive the car 00 power.
  • FIG. 2 is a schematic explosion diagram of the battery 1 provided by some embodiments of the present application.
  • the battery 1 includes a case 11 and battery cells 12 .
  • the box body 11 is used to accommodate the battery cells 12 , and the box body 11 may have various structures.
  • the box body 11 may include a first box body part 11a and a second box body part 11b, the first box body part 11a and the second box body part 11b cover each other, the first box body part 11a and the second box body part 11b
  • the two box parts 11b jointly define an inner space 11c for accommodating the battery cells 12 .
  • the second box part 11b can be a hollow structure with an opening at one end, the first box part 11a is a plate-shaped structure, and the first box part 11a covers the opening side of the second box part 11b to form an inner space 11c
  • the box body 11; the first box body portion 11a and the second box body portion 11b can also be a hollow structure with one side opening, and the opening side of the first box body portion 11a is covered on the opening side of the second box body portion 11b , to form a box 11 having an inner space 11c.
  • the first box body part 11a and the second box body part 11b can be in various shapes, such as a cylinder, a cuboid, and the like.
  • the first box part 11a covers the top of the second box part 11b
  • the first box part 11a can also be called an upper box cover
  • the second box part 11b can also be called a lower box.
  • the plurality of battery cells 12 may be connected in series, in parallel or in parallel.
  • the mixed connection means that the plurality of battery cells 12 are both in series and in parallel.
  • a plurality of battery cells 12 can be directly connected in series or in parallel or mixed together, and then the whole of the plurality of battery cells 12 is accommodated in the box 11; of course, a plurality of battery cells 12 can also be connected in series first
  • a battery module is formed by connecting in parallel or in series, and multiple battery modules are connected in series or in parallel or in series to form a whole, and are housed in the case 11 .
  • there are multiple battery cells 12 and the multiple battery cells 12 are connected in series, in parallel or in parallel to form a battery module.
  • a plurality of battery modules are connected in series, in parallel or in combination to form a whole, and are accommodated in the case 11 .
  • FIG. 3 is a schematic structural diagram of a battery cell 12 provided in some embodiments of the present application.
  • FIG. 3 is a schematic diagram of an exploded structure of a battery cell 12 provided by some embodiments of the present application.
  • the battery cell 12 refers to the smallest unit constituting a battery. As shown in FIG. 3 , the battery cell 12 includes an end cover 121 , a casing 122 and an electrode assembly 123 .
  • the end cap 121 refers to a component that covers the opening of the casing 122 to isolate the internal environment of the battery cell 12 from the external environment.
  • the shape of the end cap 121 can be adapted to the shape of the housing 122 to fit the housing 122 .
  • the end cap 121 can be made of a material (such as aluminum alloy) with a certain hardness and strength, so that the end cap 121 is not easy to deform when being squeezed and collided, so that the battery cell 12 can have a higher Structural strength and safety performance can also be improved.
  • the end cover 121 may be provided with functional components such as poles 121 a and the like.
  • the pole 121 a can be used for electrical connection with the electrode assembly 123 for outputting or inputting electric energy of the battery cell 12 .
  • the end cover 121 may also be provided with a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell 12 reaches a threshold value.
  • the material of the end cap 121 may also be various, for example, copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not particularly limited in this embodiment of the present application.
  • an insulator can also be provided inside the end cover 121, and the insulator can be used to isolate the electrical connection components in the housing 122 from the end cover 121, so as to reduce the risk of short circuit.
  • the insulating member may be plastic, rubber or the like.
  • the casing 122 is a component for mating with the end cap 121 to form the internal environment of the battery cell 12 , wherein the formed internal environment can be used to accommodate the electrode assembly 123 , electrolyte (not shown in the figure) and other components.
  • the housing 122 and the end cover 121 can be independent components, and an opening can be provided on the housing 122 , and the internal environment of the battery cell 12 can be formed by making the end cover 121 cover the opening at the opening.
  • the end cover 121 and the housing 122 can also be integrated. Specifically, the end cover 121 and the housing 122 can form a common connection surface before other components are inserted into the housing.
  • the housing 122 can be in various shapes and sizes, such as cuboid, cylinder, hexagonal prism and so on. Specifically, the shape of the casing 122 may be determined according to the specific shape and size of the electrode assembly 123 .
  • the housing 122 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not particularly limited in this embodiment of the present application.
  • the electrode assembly 123 is a part where the electrochemical reaction occurs in the battery cell 12 .
  • One or more electrode assemblies 123 may be contained within the case 122 .
  • the electrode assembly 123 is mainly formed by winding or stacking the positive electrode sheet and the negative electrode sheet, and usually a separator is provided between the positive electrode sheet and the negative electrode sheet.
  • the part of the positive electrode sheet and the negative electrode sheet with the active material constitutes the main body of the cell assembly, and the parts of the positive electrode sheet and the negative electrode sheet without the active material each constitute tabs (not shown in the figure).
  • the positive pole tab and the negative pole tab can be located at one end of the main body together or at two ends of the main body respectively.
  • the positive electrode active material and the negative electrode active material react with the electrolyte, and the tabs are connected to the pole 121a to form a current loop.
  • the battery 1 provided by the embodiment of the present application will be explained in detail below in conjunction with the accompanying drawings, and then the welding deviation detection device provided in the present application will be explained in combination with the structure of the battery 1 . It should be noted here that the battery 1 provided in the embodiment of the present application can detect the welding deviation of the pole 121a and the bus assembly 14 in the battery 1 through the welding deviation detection device and the welding deviation detection method in the following embodiments.
  • Fig. 4 is a schematic structural diagram of a battery 1 provided in the embodiment of the present application
  • Fig. 5 is a schematic structural diagram of another battery 1 provided in the embodiment of the present application, wherein Fig. 4 does not show the bus assembly 14, and Fig. 5 shows The bus assembly 14 is provided.
  • the battery 1 includes an end plate 13 and a bus assembly 14 .
  • the end plate 13 is provided with a positioning hole 131 along the first direction X, and the positioning hole 131 is used for positioning the poles 121a of the plurality of battery cells 12 .
  • the bus assembly 14 is welded to the pole 121 a based on the positioning of the positioning hole 131 , and the bus assembly 14 is used to electrically connect a plurality of battery cells 12 .
  • the battery 1 provided in the embodiment of the present application includes two opposite end plates 13 , and the structures of the two end plates 13 may be the same or different. After a plurality of battery cells 12 are stacked along the length direction of the battery 1, two end plates 13 are located at both ends of the plurality of battery cells 12 along the length direction of the battery 1, so as to connect the plurality of batteries along the length direction of the battery 1.
  • the monomer 12 is limited. After the two end plates 13 limit the plurality of battery cells 12, the relative position between the positioning hole 131 on the end plate 13 and the pole 121a of each battery cell 12 is fixed.
  • the poles 121 a of the plurality of battery cells 12 are positioned through the holes 131 , in other words, the positions of the poles 121 a are determined by the positions of the positioning holes 131 .
  • the positioning hole 131 may be a round hole, a square hole, etc., and the positioning hole 131 may be a through hole provided on the end plate 13 along the first direction X, or a blind hole provided on the end plate 13 along the first direction X.
  • the position of the positioning hole 131 can be the position coordinate of the positioning hole 131 in the plane coordinate system
  • the position of the pole 121a can be the position coordinate of the pole 121a in the same plane coordinate system
  • the plane coordinate system can be the length of the battery 1
  • the direction is the horizontal axis/vertical axis
  • the coordinate system is established with the width direction of the battery 1 as the vertical axis/horizontal axis, and any point in the plane where the end of the battery 1 facing the bus assembly 14 is located as the origin.
  • At least one end plate 13 of the two end plates 13 may be provided with a positioning hole 131 along the first direction X, through any positioning hole 131 , the pole posts 121a of the plurality of battery cells 12 may be positioned.
  • positioning holes 131 may be provided on the first end plate 13 only along the first direction X, and the plurality of poles 121a may be positioned through the positioning holes 131 on the first end plate 13; or, it may be only along the first direction X sets positioning holes 131 on the second end plate 13, through which a plurality of poles 121a are positioned through the positioning holes 131 on the second end plate 13; or, it can also be positioned on the two end plates 13 along the first direction X Both positioning holes 131 are provided, and the plurality of poles 121 a are positioned through the positioning holes 131 on the two end plates 13 .
  • the first direction X is the height direction of the battery 1
  • the label of the first direction X can refer to FIG. 6 .
  • the bus assembly 14 is roughly in the shape of a rectangular plate. After multiple battery cells 12 are stacked, the poles 121a of the multiple battery cells 12 are not connected to each other. If the bus assembly 14 is welded to the poles 121a, the poles of the adjacent multiple battery cells 12 can be connected. 121a, so that a plurality of adjacent battery cells 12 are electrically connected. When welding the bus assembly 14 and the poles 121a, the bus assembly 14 covers multiple poles 121a, making it difficult for the welding device 52 to find the positions of the poles 121a.
  • the bus assembly 14 since the bus assembly 14 only covers the pole 121a and does not cover the end plate 13, the covered pole 121a can be positioned based on the positioning hole 131 on the end plate 13, thereby facilitating the welding device 52 to accurately connect the bus assembly 14 to a plurality of poles.
  • the post 121a is welded.
  • positioning holes 131 are provided on the end plate 13. Since the relative positions of the end plate 13 and the plurality of battery cells 12 that are limited are fixed, the positioning holes 131 on the end plate 13 are aligned with the plurality of battery cells 12. The relative positions of the poles 121 a of the battery cells 12 are fixed, so the poles 121 a of a plurality of battery cells 12 can be positioned through the positioning holes 131 . Even if the bus assembly 14 covers multiple poles 121a, the multiple poles 121a can be accurately positioned through the positioning hole 131, thereby providing a positioning reference for welding the bus bar and the poles 121a, which facilitates accurate welding of the bus assembly 14 and the poles 121a.
  • the positioning hole 131 may subsequently provide a position reference for detecting the welding deviation between the bus assembly 14 and the pole 121a.
  • the setting of the positioning hole 131 can make the pole 121a not need to open a hole, so that the surface of the pole 121a is complete, and can provide a larger solderable area.
  • the battery 1 flows from the previous station to the next station of the assembly line 7 on the conveyor belt, and the battery 1 will inevitably rotate on the conveyor belt due to vibration and other reasons during the conveyor belt transmission process.
  • the number of positioning holes 131 can be set to two, and the two positioning holes 131 are dislocated along the second direction Y and the third direction Z, and the second direction Y, the third direction Z and the first direction X's are perpendicular to each other.
  • the second direction Y and the third direction Z may be the length direction and the width direction of the battery 1 respectively.
  • the second direction Y is the length direction of the battery 1
  • the third direction Z is the width direction of the battery 1 .
  • the number of positioning holes 131 provided on the end plate 13 can be two.
  • the two positioning holes 131 can be distributed along the second direction Y and the third direction Z.
  • the abscissa and ordinate of the two positioning holes 131 are different.
  • the two positioning holes 131 on the first end plate 13 can be dislocated along the second direction Y and the third direction Z, and the second end plate The two positioning holes 131 on 13 can also be distributed along the second direction Y and the third direction Z. Further, the four positioning holes 131 on the two end plates 13 can be misaligned along the second direction Y and the third direction Z. In this case, when the second direction Y and the third direction Z are used as coordinate axes In the established coordinate system of the same plane, the four positioning holes 131 have different abscissas and different ordinates. In this way, the pole post 121a can be positioned from four directions, which improves the positioning accuracy of the pole post 121a.
  • the number of positioning holes 131 provided on the end plate 13 may also be more than three, and the embodiment of the present application does not limit the number of positioning holes 131 on the end plate 13 .
  • too many positioning holes 131 are provided on the end plate 13, which will easily affect the structural strength of the end plate 13, and will increase the workload of determining the position of the pole 121a based on the positions of the positioning holes 131. Therefore, according to the strength of the end plate 13
  • the number of positioning holes 131 is set reasonably according to requirements and other actual conditions. For example, preferably, the number of positioning holes 131 on one end plate 13 can be set to two.
  • the number of positioning holes 131 is set to two, and the two positioning holes 131 are dislocated along the second direction Y and the third direction Z, so that the two positioning holes 131 can position the pole 121a from different directions, improving The accuracy of the positioning of the pole 121a is improved.
  • a detection hole 141 is provided at the part corresponding to the pole 121a of the current collection assembly 14 , and the detection hole 141 is configured to allow detection of the connection between the pole 121a and the current collection assembly 14 through the detection hole 141 .
  • the diameter of the detection hole 141 is 1.5mm-2mm.
  • the bus assembly 14 covers the pole 121a along the first direction X. After the bus assembly 14 and the pole 121a are welded along the first direction X, there may be a gap between the bus assembly 14 and the pole 121a, that is, a fitting gap. If the size of the gap exceeds a certain range, it is considered that the welding quality does not meet the requirements. Therefore, it is necessary to detect the bonding gap between the pole 121 a and the bus assembly 14 .
  • the detection hole 141 may be a round hole, a square hole or the like.
  • the detection holes 141 are arranged on the bus assembly 14 corresponding to the positions of the poles 121a, the number of the detection holes 141 is the same as the number of the poles 121a, and the positions of the detection holes 141 correspond to the positions of the poles 121a.
  • the diameter of the detection hole 141 can be set according to the detection requirements of the detector, for example, the diameter of the detection hole 141 can be 1.5mm-2mm.
  • the aperture diameter of the detection hole 141 can be set smaller.
  • a detection hole 141 is provided at the position corresponding to the pole 121a of the bus assembly 14 , so that the detector can detect the bonding gap between the pole 121a and the bus assembly 14 through the detection hole 141 .
  • Setting the diameter of the detection hole 141 to 1.5 mm to 2 mm can meet the detection requirements of the detector, and will not affect the welding quality due to the large diameter of the detection hole 141 .
  • FIG. 6 is a structural schematic diagram of a welding deviation detection device provided by the embodiment of the present application.
  • the welding deviation detection device includes a pre-welding addressing mechanism 4 , a welding mechanism 5 and a post-welding detection mechanism 6 .
  • the pre-welding addressing mechanism 4 is used to determine the relative positional relationship between the positioning hole 131 and the plurality of poles 121a in the battery 1, and send the relative positional relationship to the welding mechanism 5 and the post-welding detection mechanism 6.
  • the positioning hole 131 is along the first direction X is provided on the end plate 13 of the battery 1 .
  • the welding mechanism 5 is used to detect the first position of the positioning hole 131, determine the first position of the plurality of poles 121a based on the first position of the positioning hole 131 and the received relative positional relationship, and perform welding based on the first position of the plurality of poles 121a.
  • the bus assembly 14 and the plurality of poles 121a form a plurality of welding seams.
  • the post-weld detection mechanism 6 is used to detect the second position of the positioning hole 131 and the positions of the plurality of welds, and detect the connection between the bus assembly 14 and Welding deviation of pole 121a.
  • the pre-welding addressing mechanism 4 is located upstream of the welding mechanism 5 on the assembly line 7
  • the post-welding detection mechanism 6 is located downstream of the welding mechanism 5 on the assembly line 7 .
  • the pre-welding addressing mechanism 4, the welding mechanism 5, and the post-welding detection mechanism 6 are equivalent to three stations from upstream to downstream on the assembly line 7.
  • the pole 121a in the pre-welding addressing mechanism 4 does not cover the confluence component 14, and the pole 121a and the end plate 13 are exposed, so the pre-weld detection mechanism can determine the relative positional relationship between the positioning hole 131 and the plurality of poles 121a.
  • the pole 121a of the welding mechanism 5 and the post-welding detection mechanism 6 is covered with a confluence component 14, and only the end plate 13 is exposed outside the pole 121a and the end plate 13, so the welding mechanism 5 and the post-weld detection mechanism 6 can only detect the end plate 13, the position of each pole 121a cannot be directly detected.
  • the welding mechanism 5 receives the relative positional relationship sent by the pre-welding addressing mechanism 4, it can determine the position of each pole 121a in the welding mechanism 5 according to the detected position of the positioning hole 131 and the received relative positional relationship.
  • the post-weld detection mechanism 6 When the post-weld detection mechanism 6 receives the relative positional relationship sent by the pre-weld addressing mechanism 4, it can determine each post in the post-weld detection mechanism 6 according to the detected position of the positioning hole 131 and the received relative positional relationship. The location of 121a.
  • the position of the positioning hole 131 in the welding mechanism 5 is marked as the first position of the positioning hole 131, and the position of the pole 121a in the welding mechanism 5 is marked as the first position of the pole 121a;
  • the position of the central positioning hole 131 is recorded as the second position of the positioning hole 131, and the position of the pole 121a in the post-welding detection mechanism 6 is recorded as the second position of the pole 121a.
  • At least one end plate 13 of the battery 1 may be provided with a positioning hole 131
  • one end plate 13 may be provided with at least one positioning hole 131
  • the pre-welding addressing mechanism 4 can determine the relative positional relationship between any positioning hole 131 on each end plate 13 and the plurality of poles 121a.
  • the pre-welding addressing mechanism 4 can determine The relative positional relationship between the positioning hole 131 on the first end plate 13 and the six poles 121a can also determine the relative position between the first positioning hole 131 on the second end plate 13 and the six poles 121a. positional relationship, and determine the relative positional relationship between the second positioning hole 131 on the second end plate 13 and the six poles 121a. Afterwards, the pre-welding addressing mechanism 4 can send the determined relative positional relationship between each positioning hole 131 and each pole 121 a to the welding mechanism 5 and the post-welding detection mechanism 6 .
  • the welding mechanism 5 can detect the first position of each positioning hole 131 on each end plate 13 in the welding mechanism 5, and determine the first position of each pole 121a based on the first position of each positioning hole 131 and the received relative positional relationship. A position, so as to accurately weld the bus assembly 14 and each pole 121a based on the determined first position of each pole 121a. Every time the bus assembly 14 is welded to a pole 121a, a weld can be obtained. It can be seen that the number of welds is the same as the number of poles 121a, and the positions of the welds correspond to the positions of poles 121a.
  • the bus assembly 14 has been welded to all poles 121a, and the post-weld detection mechanism 6 can detect the second position of each positioning hole 131 on each end plate 13 in the post-welding mechanism, based on the position of each positioning hole The second position of 131 and the received relative position relationship determine the second position of each pole 121a.
  • the post-weld detection mechanism 6 can also detect the position of each weld seam. Afterwards, the post-weld detection mechanism 6 can detect the welding deviation between the bus assembly 14 and the pole 121a based on the second position of each pole 121a and the position of each welding seam.
  • the pre-welding addressing mechanism 4 can determine the relative positional relationship between the positioning hole 131 in the battery 1 and the plurality of poles 121a, and send the relative positional relationship to the welding mechanism 5 and the post-welding detection mechanism 6 .
  • the welding mechanism 5 can detect the first position of the positioning hole 131, and determine the first position of the plurality of poles 121a based on the first position of the positioning hole 131 and the received relative position relationship, so the welding mechanism 5 can be based on the first position of the plurality of poles 121a
  • the first position is accurately welded to the bus assembly 14 and the plurality of poles 121a to form a plurality of welding seams.
  • the post-weld detection mechanism 6 can detect the second position of the positioning hole 131 and the positions of the plurality of welding seams, and detect the connection between the bus assembly 14 and the electrode based on the second position of the positioning hole 131, the positions of the plurality of welding seams, and the received relative positional relationship. Welding deviation of column 121a.
  • the embodiment of the present application can not only accurately weld the bus assembly 14 and the multiple poles 121 a through the welding mechanism 5 , but also detect the welding deviation in a simple and timely manner through the post-welding detection mechanism 6 .
  • the pre-welding addressing mechanism 4 includes a first visual camera 41 for detecting the position of the positioning hole 131 and the positions of the poles 121a, based on the position of the positioning hole 131 and The positions of the plurality of poles 121a determine the relative positional relationship, and send the relative positional relationship to the welding mechanism 5 and the post-welding detection mechanism 6 .
  • the first visual camera 41 can be any device that can perform visual shooting and positioning, for example, it can be a CCD (charge coupled device, charge coupled device) camera.
  • the first visual camera 41 can take pictures of the positioning holes 131 and poles 121a on the end plates 13, and detect each positioning hole 131 on each end plate 13 and the position of each pole 121a.
  • the first visual camera 41 can detect the positions of the m positioning holes 131 and the n poles 121a, and can based on The positions of the m positioning holes 131 and the n poles 121a determine m*n relative positional relationships. Afterwards, the m*n relative positional relationships can be sent to the welding mechanism 5 and the post-welding detection mechanism 6 .
  • the first visual camera 41 can take the second direction Y as the horizontal axis/longitudinal axis, take the third direction Z as the vertical axis/horizontal axis, and take any point in the plane where the end of the battery 1 toward the bus assembly 14 is located as the origin to establish a plane Coordinate System.
  • the pre-welding addressing mechanism 4 detect the position coordinates of the positioning hole 131 in the plane coordinate system and the position coordinates of each pole 121a in the plane coordinate system; calculate each pole 121a and the positioning hole 131 in The distance between the second direction Y and the third direction Z.
  • the relative positional relationship between the positioning hole 131 and the poles 121 a includes the distance between the positioning hole 131 and the poles 121 a in the second direction Y and the third direction Z.
  • the position coordinates of the first positioning hole 131 are (X1, Y1)
  • the position coordinates of the second positioning hole 131 are (X2, Y2)
  • the position coordinates of the first pole 121a are ( M1, N1)
  • the position coordinates of the second pole 121a are (M2, N2).
  • the positional relationship between the first positioning hole 131 and the first pole 121a includes: the distance between the first positioning hole 131 and the first pole 121a in the second direction Y is M1-X1, the first positioning hole The distance between 131 and the first pole 121a in the third direction Z is N1-Y1.
  • the positional relationship between the first positioning hole 131 and the second pole 121a includes: the distance between the first positioning hole 131 and the second pole 121a in the second direction Y is M2-X1, the first positioning hole 131 The distance from the second pole 121a in the third direction Z is N2-Y1.
  • the positional relationship between the second positioning hole 131 and the first pole 121a includes: the distance between the second positioning hole 131 and the first pole 121a in the second direction Y is M1-X2, and the second positioning hole 131 The distance from the first pole 121a in the third direction Z is N1-Y2.
  • the positional relationship between the second positioning hole 131 and the second pole 121a includes: the distance between the second positioning hole 131 and the second pole 121a in the second direction Y is M2-X2, and the second positioning hole 131 The distance from the first pole 121a in the third direction Z is N2-Y2.
  • the position of the positioning hole 131 and the positions of the plurality of poles 121a can be detected in the pre-welding addressing mechanism 4, and the relative positional relationship can be determined based on the position of the positioning hole 131 and the positions of the plurality of poles 121a , and send the relative position relationship to the welding mechanism 5 and the post-weld detection mechanism 6, which can facilitate the welding mechanism 5 and the post-weld detection mechanism 6 to accurately determine the position of each pole 121a.
  • the welding mechanism 5 includes a second visual camera 51 and a welding device 52 .
  • the second vision camera 51 is used to detect the first position of the positioning hole 131 and receive the relative positional relationship, determine the first position of the plurality of poles 121a based on the first position of the positioning hole 131 and the relative positional relationship, and place the plurality of poles
  • the first position of the column 121 a is sent to the welding device 52 .
  • the welding device 52 is used for receiving the first positions of the plurality of poles 121a, and welding the bus assembly 14 and the plurality of poles 121a based on the first positions of the plurality of poles 121a.
  • the structure of the second visual camera 51 may be the same as that of the first visual camera 41 .
  • the second visual camera 51 may be electrically connected to the first visual camera 41 so as to receive the relative positional relationship sent by the first visual camera 41 .
  • the second visual camera 51 can take the second direction Y as the horizontal axis/longitudinal axis, take the third direction Z as the vertical axis/horizontal axis, and take any point in the plane where the end of the battery 1 toward the bus assembly 14 is located as the origin to establish a plane Coordinate System.
  • the second visual camera 51 can take pictures of the positioning holes 131 on the end plate 13, and detect the position of each positioning hole 131 in the plane coordinate system in the welding mechanism 5 coordinates, that is, the first position of the positioning hole 131 .
  • the position coordinates of each pole 121a in the plane coordinate system are calculated based on the first position of the positioning hole 131 and the received relative position relationship, that is, the first position of the pole 121a.
  • the second vision camera 51 can also be electrically connected with the welding device 52 so as to send the first position of each pole 121 a to the welding device 52 .
  • the welding device 52 may be a laser welding oscillating head, which is used to realize the collimation and focusing of the laser, and realize the welding of the pole 121 a and the bus assembly 14 .
  • the second vision camera 51 can detect the first positions of the m positioning holes 131, and based on the position of the m positioning holes 131 The first position and the m*n relative positional relationships determine the first position of the n poles 121a. Afterwards, the first positions of the n poles 121 a may be sent to the welding device 52 .
  • the first position of the positioning hole 131 can be detected in the welding mechanism 5 and the relative positional relationship sent by the first visual camera 41 can be received, based on the first position of the positioning hole 131 and the relative positional relationship to determine more the first position of each pole 121a, and send the first positions of multiple poles 121a to the welding device 52.
  • the welding device 52 can receive the first positions of the multiple poles 121a, and weld the bus assembly 14 and the multiple poles 121a based on the first positions of the multiple poles 121a, and the welding device 52 can accurately weld the bus assembly 14 With a plurality of poles 121a.
  • the post-weld detection mechanism 6 includes a third visual camera 61, which is used to detect the second position of the positioning hole 131 and the positions of the plurality of welds, and receive the relative positional relationship, based on The second position of the positioning hole 131 and the relative positional relationship determine the second position of the plurality of poles 121a, and detect the welding of the bus assembly 14 and the poles 121a based on the second position of the plurality of poles 121a and the positions of the plurality of welds. partial situation.
  • the structure of the third visual camera 61 may be the same as that of the first visual camera 41 and the second visual camera 51 .
  • the third visual camera 61 may be electrically connected to the first visual camera 41 so as to receive the relative positional relationship sent by the first visual camera 41 .
  • the third visual camera 61 can take the second direction Y as the horizontal axis/longitudinal axis, take the third direction Z as the vertical axis/horizontal axis, and take any point in the plane where the end of the battery 1 toward the bus assembly 14 is located as the origin to establish a plane Coordinate System.
  • the third visual camera 61 can check the position The holes 131 are photographed, and the position coordinates of each positioning hole 131 in the plane coordinate system are detected in the post-welding detection mechanism 6 , that is, the second position of the positioning hole 131 .
  • the position coordinates of each pole 121a in the plane coordinate system are calculated based on the second position of the positioning hole 131 and the received relative position relationship, that is, the second position of the pole 121a.
  • the third visual camera 61 can also detect the position of each weld seam in the post-weld detection mechanism 6, and then compare the second position of each pole 121a with the position of the corresponding weld seam to detect the connection between the current collector assembly 14 and the pole pole. Welding deviation of 121a. Wherein, when the welding seam is circular, the position of a certain welding seam may be the position coordinates of the center of the welding seam.
  • the third vision camera 61 can detect the second positions of the m positioning holes 131, and can locate the m positioning holes based on the m positioning holes. The second position of the hole 131 and the m*n relative positional relationships determine the second position of the n poles 121a.
  • the third visual camera 61 can also detect the positions of n welds in the post-weld detection mechanism 6, and then can detect the connection between the bus assembly 14 and the position of the n welds based on the second positions of the n poles 121a and the n welds. Welding deviation of the n poles 121a.
  • the first distance threshold in the second direction Y between the position of the pole 121 a and the position of the weld seam, and the second distance threshold in the third direction Z can be pre-stored in the third vision camera 61 .
  • the third vision camera 61 compares the second position of each pole 121a with the position of the corresponding weld seam to detect the welding deviation of the bus assembly 14 and the pole 121a, it uses a certain pole 121a and the corresponding weld seam
  • the first distance between the second position of the pole 121a and the position of the corresponding weld in the second direction Y can be determined, and the distance between the second position of the pole 121a and the position of the corresponding weld in the third direction Z can be determined.
  • the second spacing on is
  • first spacing exceeds the first spacing threshold, and/or the second spacing exceeds the second spacing threshold, it is determined that the pole 121a deviates from the corresponding welding seam, so that it can be determined that there is a welding deviation between the bus assembly 14 and the pole 121a . On the contrary, it can be determined that there is no welding offset between the bus assembly 14 and the pole 121a.
  • the second position of the positioning hole 131 and the positions of a plurality of welding seams can be detected in the post-welding detection mechanism 6, and the relative positional relationship sent by the first visual camera 41 can be received, based on the positioning hole 131
  • the second position and the relative positional relationship of the multiple poles 121a determine the second position, and based on the second position of the multiple poles 121a and the position of the welding seam, detect the welding deviation between the bus assembly 14 and the poles 121a, so as to realize Very good monitoring of welding quality.
  • the post-weld detection mechanism 6 may further include an electronic measuring instrument 62 for detecting the bonding gap between the pole 121 a and the bus assembly 14 through the detection hole 141 .
  • the electronic measuring instrument 62 may be a three-dimensional profiler or the like. Taking the three-dimensional profiler as an example, the three-dimensional profiler has a signal transmitting end and a signal receiving end, and the signal transmitting end and the signal receiving end have a certain angle, and the signal transmitting end of the three-dimensional profiler can send the signal to the signal receiving end Afterwards, the bonding gap between the pole 121a and the bus assembly 14 is determined through feedback from the signal receiving end. Wherein, the bonding gap refers to the distance between the pole 121 a and the bus assembly 14 in the first direction X. Each pole 121 a and the bus assembly 14 have a bonding gap in the first direction X, so the number of bonding gaps is consistent with the number of poles 121 a.
  • n bonding gaps between the n poles 121 a and the bus assembly 14 .
  • the electronic measuring instrument 62 can respectively detect n bonding gaps between the n poles 121a and the bus assembly 14 through the n detection holes 141 on the bus assembly 14 . Afterwards, the n bonding gaps can be evaluated, and then the welding quality between the n poles 121 a and the bus assembly 14 can be evaluated.
  • the threshold value of the gap between the pole 121 a and the bus assembly 14 may be pre-stored in the electronic measuring instrument 62 .
  • the electronic measuring instrument 62 respectively detects the n bonding gaps between the n poles 121a and the bus assembly 14 through the n detection holes 141 on the bus assembly 14, take a certain pole 121a and the bus assembly 14 as an example
  • the bonding gap between the pole 121a and the bus assembly 14 can be compared with the gap threshold. If the fitting gap between the pole 121a and the bus assembly 14 is greater than the gap threshold, it is considered that the fitting gap between the pole 121a and the bus assembly 14 is relatively large, and the welding quality of the pole 121a and the bus assembly 14 is determined. bad. On the contrary, it can be determined that the welding quality between the pole post 121a and the bus assembly 14 is relatively good.
  • each pole 121a and the current flow assembly 14 can be detected through the detection hole 141 in the post-welding detection mechanism 6, and then each pole 121a and the current flow assembly can be evaluated based on the bonding gap. 14 welding quality, to achieve a very good monitoring of welding quality.
  • the embodiment of the present application also provides a welding deviation detection method, which can be applied to the welding deviation detection device in the previous embodiment, as shown in Figure 7, the method includes:
  • S1 Determine the relative positional relationship between the positioning hole 131 in the battery 1 and the plurality of poles 121a through the pre-welding addressing mechanism 4, and send the relative positional relationship to the welding mechanism 5 and the post-welding detection mechanism 6.
  • the relative positional relationship between the positioning hole 131 and the plurality of poles 121a in the battery 1 can be determined by the pre-welding addressing mechanism 4 , and the relative positional relationship is sent to the welding mechanism 5 and the post-welding detection mechanism 6 .
  • the first position of the positioning hole 131 can be detected by the welding mechanism 5, and the first position of the plurality of poles 121a can be determined based on the first position of the positioning hole 131 and the received relative positional relationship, so the welding mechanism 5 can be based on a plurality of poles
  • the first position of 121a accurately welds the bus assembly 14 and the plurality of poles 121a to form a plurality of welding seams.
  • the second position of the positioning hole 131 and the positions of the plurality of welding seams can be detected by the post-welding detection mechanism 6, based on the second position of the positioning hole 131, the positions of the plurality of welding seams, and the received relative positional relationship between the bus assembly 14 and the Welding deviation of pole 121a.
  • the embodiment of the present application can not only accurately weld the bus assembly 14 and the multiple poles 121 a through the welding mechanism 5 , but also detect the welding deviation in a simple and timely manner through the post-welding detection mechanism 6 .
  • the welding deviation detection method may include: detecting the position of the positioning hole 131 and the position of the plurality of poles 121a by the first visual camera 41 position, based on the position of the positioning hole 131 and the positions of the plurality of poles 121a to determine the relative positional relationship, and send the relative positional relationship to the welding mechanism 5 and the post-weld detection mechanism 6 .
  • the welding deviation detection method may include: detecting the first position and receiving the relative position of the positioning hole 131 by the second vision camera 51 relationship, based on the first position of the positioning hole 131 and the relative positional relationship to determine the first position of a plurality of poles 121a, and send the first position of a plurality of poles 121a to the welding device 52; receive a plurality of poles through the welding device 52
  • the first position of the column 121a is based on the first position of the plurality of poles 121a, and the bus assembly 14 is welded to the plurality of poles 121a.
  • the welding deviation detection method may include: using the third vision camera 61 to detect the second position of the positioning hole 131 and the positions of the plurality of welding seams, And receiving the relative positional relationship, determining the second position of the plurality of poles 121a based on the second position of the positioning hole 131 and the relative positional relationship, and detecting the bus assembly based on the second position of the plurality of poles 121a and the positions of the plurality of welds 14 and pole 121a welding deviation.
  • the welding deviation detection method may include: detecting the bonding gap between the pole 121 a and the bus assembly 14 through the detecting hole 141 of the electronic measuring instrument 62 .
  • the above-mentioned welding deviation detection method corresponds to the welding deviation detection device in the previous embodiment.
  • the details of each step in the welding deviation detection method have been described in detail in the corresponding welding deviation detection device embodiment.
  • For the welding deviation detection method For the explanation of each step, reference may be made to the relevant description in the embodiment of the welding deviation detection device, and details are not repeated here.
  • the embodiment of the present application further provides an electric device, including the battery 1 in the foregoing embodiments, and the battery 1 is used to provide electric energy for the electric device.
  • the electric device may be any of the aforementioned devices or systems using the battery 1 .
  • the electrical device can detect the welding deviation between the pole 121a and the bus assembly 14 in the battery 1 through the welding deviation detection device and the welding deviation detection method in the previous embodiments.
  • the present application provides a welding deviation detection device, which includes a pre-welding addressing mechanism 4 , a welding mechanism 5 and a post-welding detection mechanism 6 .
  • the pre-welding addressing mechanism 4 includes a first visual camera 41
  • the welding mechanism 5 includes a second visual camera 51 and a welding device 52
  • the post-welding detection mechanism 6 includes a third visual camera 61 and an electronic measuring instrument 62 . Both the second vision camera 51 and the third vision camera 61 are electrically connected to the first vision camera 41
  • the second vision camera 51 is electrically connected to the welding device 52 .
  • the first visual camera 41 can detect the position of the positioning hole 131 and the positions of the plurality of poles 121a, determine the relative positional relationship based on the position of the positioning hole 131 and the positions of the plurality of poles 121a, and send the relative positional relationship to the welding mechanism 5 and post-weld detection mechanism 6.
  • the second visual camera 51 can detect the first position of the positioning hole 131 and receive the relative positional relationship, determine the first position of the plurality of poles 121a based on the first position of the positioning hole 131 and the relative positional relationship, and place the plurality of poles
  • the first position of 121 a is sent to the welding device 52 .
  • the welding device 52 can receive the first positions of the plurality of poles 121a, and weld the bus assembly 14 and the plurality of poles 121a based on the first positions of the plurality of poles 121a.
  • the third visual camera 61 can detect the second position of the positioning hole 131 and the positions of the plurality of welding seams, and receive the relative positional relationship, and determine the second position of the plurality of poles 121a based on the second position of the positioning hole 131 and the relative positional relationship. position, and based on the second positions of the multiple poles 121a and the positions of the multiple welds, detect the welding deviation between the bus assembly 14 and the poles 121a.
  • the electronic measuring instrument 62 can detect the bonding gap between the pole 121 a and the bus assembly 14 through the detection hole 141 .

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Abstract

一种焊偏检测装置，包括焊前寻址机构（4）可以确定电池（1）中定位孔（131）与多个极柱（121a）的相对位置关系，将相对位置关系发送给焊接机构（5）和焊后检测机构（6）。焊接机构（5）可以检测定位孔（131）的第一位置，基于定位孔（131）的第一位置和相对位置关系确定多个极柱（121a）的第一位置，因此焊接机构（5）可以基于多个极柱（121a）的第一位置准确焊接汇流组件（14）与多个极柱（121a），以形成多个焊缝。焊后检测机构（6）可以检测定位孔（131）的第二位置和多个焊缝的位置，基于定位孔（131）的第二位置、多个焊缝的位置，以及相对位置关系检测汇流组件（14）与极柱（121a）的焊偏情况。不仅可以通过焊接机构（5）准确焊接汇流组件（14）与多个极柱（121a），还可以通过焊后检测机构（6）简便、及时检测出焊偏情况。此外，还提出了一种焊偏检测方法、电池和用电装置。

Description

一种电池、用电装置、焊偏检测装置及方法
本申请要求于2021年11月16日提交中国专利局、申请号为202111358262.1、发明名称为“一种电池、用电装置、焊偏检测装置及方法”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请实施例涉及电池制造技术领域，尤其涉及一种电池、用电装置、焊偏检测装置及方法。
背景技术
在动力电池的生产过程中，需要将电池中多个电池单体的多个极柱与汇流组件焊接在一起，实现多个电池单体的电连接。如果汇流组件与极柱焊偏，将影响电池的安全性能。相关技术针对如何提高焊接位置的精准度研究较多，很少有对焊接质量进行检测的研究，因此，亟需一种焊偏检测装置，来对汇流组件与极柱的焊偏情况进行检测，从而实现对焊接质量的监控。
发明内容
鉴于上述问题，本申请实施例提供了一种电池、用电装置、焊偏检测装置及方法，可以通过焊接机构准确焊接汇流组件与多个极柱，还可以通过焊后检测机构简便、及时检测出焊偏情况。
根据本申请实施例的第一个方面，提供了一种焊偏检测装置。该焊偏检测装置包括焊前寻址机构、焊接机构和焊后检测机构。焊前寻址机构用于确定电池中定位孔与多个极柱的相对位置关系，并将相对位置关系发送给焊接机构和焊后检测机构，定位孔沿第一方向设置于电池的端板上。焊接机构用于检测定位孔的第一位置，基于定位孔的第一位置和接收的相对位置关系确定多个极柱的第一位置，基于多个极柱的第一位置焊接汇流组件与多个极柱，以形成多个焊缝。焊后检测机构用于检测定位孔的第二位置和多个焊缝的位置，基于定位孔的第二位置、多个焊缝的位置，以及接收的相对位置关系检测汇流组件与极柱的焊偏情况。
通过上述方案，焊前寻址机构可以确定电池中定位孔与多个极柱的相对位置关系，并将相对位置关系发送给焊接机构和焊后检测机构。焊接机构可以检测定位孔的第一位置，基于定位孔的第一位置和接收的相对位置关系确定出多个极柱的第一位置，因此焊接机构可以基于多个极柱的第一位置准确焊接汇流组件与多个极柱，以形成多个焊缝。焊后检测机构可以检测定位孔的第二位置和多个焊缝的位置，基于定位孔的第二位置、多个焊缝的位置，以及接收的相对位置关系检测汇流组件与极柱的焊偏情况。本申请实施例不仅可以通过焊接机构准确焊接汇流组件与多个极柱，还可以通过焊后检测机构简便、及时检测出焊偏情况。
在一些实施例中，焊前寻址机构包括第一视觉拍摄器，用于检测定位孔的位置和多个极柱的位置，基于定位孔的位置和多个极柱的位置确定相对位置关系，并将相对位置关系发送给焊接机构和焊后检测机构。
通过上述方案，可以便于焊接机构和焊后检测机构准确确定每个极柱的位置。
在一些实施例中，焊接机构包括第二视觉拍摄器和焊接装置。第二视觉拍摄器用于检测定位孔的第一位置和接收相对位置关系，基于定位孔的第一位置和相对位置关系确定多个极柱的第一位置，并将多个极柱的第一位置发送给焊接装置。焊接装置用于接收多个极柱的第一位置，并基于多个极柱的第一位置焊接汇流组件与多个极柱。
通过上述方案，第二视觉拍摄器可以准确确定出焊接机构中多个极柱的第一位置，焊接装置可以基于第二视觉拍摄器发送的极柱的第一位置准确焊接汇流组件与多个极柱，提高焊接精准度。
在一些实施例中，焊后检测机构包括第三视觉拍摄器，用于检测定位孔的第二位置和多个焊缝的位置，以及接收相对位置关系，基于定位孔的第二位置和相对位置关系确定多个极柱的第二位置，并基于多个极柱的第二位置和多个焊缝的位置检测汇流组件与极柱的焊偏情况。
通过上述方案，第三视觉拍摄器可以准确确定出焊后检测机构中多个极柱的第二位置，并可以基于检测的焊缝的位置和多个极柱的第二位置检测汇流组件与极柱的焊偏情况，从而实现对焊接质量的很好监控。
在一些实施例中，焊后检测机构还可以包括电子测量仪，用于检测极 柱与汇流组件之间的贴合间隙。
通过上述方案，可以基于该贴合间隙评价每个极柱与汇流组件的焊接质量，从而实现对焊接质量的很好监控。
根据本申请实施例的第二个方面，提供了一种焊偏检测方法，可以应用于第一方面中的焊偏检测装置，该焊偏检测方法包括：通过焊前寻址机构确定电池中定位孔与多个极柱的相对位置关系，并将相对位置关系发送给焊接机构和焊后检测机构。通过焊接机构检测定位孔的第一位置，基于定位孔的第一位置和接收的相对位置关系确定多个极柱的第一位置，基于多个极柱的第一位置焊接汇流组件与多个极柱，以形成多个焊缝。通过焊后检测机构检测定位孔的第二位置和多个焊缝的位置，基于定位孔的第二位置、多个焊缝的位置，以及接收的相对位置关系检测汇流组件与极柱的焊偏情况。
在一些实施例中，该焊偏检测方法可以包括：通过第一视觉拍摄器检测定位孔的位置和多个极柱的位置，基于定位孔的位置和多个极柱的位置确定相对位置关系，并将相对位置关系发送给焊接机构和焊后检测机构。
在一些实施例中，该焊偏检测方法可以包括：通过第二视觉拍摄器检测定位孔的第一位置和接收相对位置关系，基于定位孔的第一位置和相对位置关系确定多个极柱的第一位置，并将多个极柱的第一位置发送给焊接装置；通过焊接装置接收多个极柱的第一位置，并基于多个极柱的第一位置焊接汇流组件与多个极柱。
在一些实施例中，该焊偏检测方法可以包括：通过第三视觉拍摄器检测定位孔的第二位置和多个焊缝的位置，以及接收相对位置关系，基于定位孔的第二位置和相对位置关系确定多个极柱的第二位置，并基于多个极柱的第二位置和多个焊缝的位置检测汇流组件与极柱的焊偏情况。
在一些实施例中，该焊偏检测方法可以包括：通过电子测量仪检测极柱与汇流组件之间的贴合间隙。
根据本申请实施例的第三个方面，提供了一种电池，包括端板和汇流组件。端板沿第一方向设置有定位孔，定位孔用于定位多个电池单体的极柱。汇流组件基于定位孔的定位与极柱焊接，汇流组件用于将多个电池单体电连接。
在端板上设置定位孔，即便汇流组件覆盖在多个极柱上，通过定位孔 也可以准确定位多个极柱，从而可以为焊接汇流排与极柱提供定位参考，便于准确焊接汇流组件与极柱。定位孔后续还可以为检测汇流组件与极柱的焊偏情况提供位置参考。
在一些实施例中，定位孔的数量设置为两个，两个定位孔沿第二方向和第三方向均错位分布，第二方向、第三方向与第一方向相互垂直。
通过上述方案，两个定位孔可以从不同方位对极柱进行定位，提高了极柱定位的准确度。
在一些实施例中，汇流组件与极柱对应的部位设置有检测孔，检测孔被配置为允许通过检测孔检测极柱与汇流组件之间的贴合间隙，检测孔的孔径为1.5mm～2mm。
通过上述方案，便于检测仪通过检测孔检测极柱与汇流组件之间的贴合间隙。将检测孔的孔径设置为1.5mm～2mm，既可以满足检测仪的检测要求，也不至于因检测孔的孔径过大而影响焊接质量。
根据本申请实施例的第四个方面，提供了一种用电装置，包括第三方面中的电池，并且电池用于为用电装置提供电能。
上述说明仅是本申请实施例技术方案的概述，为了能够更清楚了解本申请实施例的技术手段，而可依照说明书的内容予以实施，并且为了让本申请实施例的上述和其它目的、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
为了更清楚地说明本申请实施例的技术方案，下面将对实施例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申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其它的附图。
图1为本申请实施例提供的一种汽车的结构示意图。
图2为本申请实施例提供的一种电池的结构示意图。
图3为本申请实施例提供的一种电池单体的结构示意图。
图4为本申请实施例提供的另一种电池的结构示意图，其中，图4未示出汇流组件。
图5为本申请实施例提供的又一种电池的结构示意图，其中，图5示出了汇流组件。
图6为本申请实施例提供的一种焊偏检测装置的结构示意图。
图7为本申请实施例提供的一种焊偏检测方法的流程示意图。
附图标记说明：
00-汽车，1-电池，11-箱体，11a-第一箱体部，11b-第二箱体部，11c-内部空间，12-电池单体，121-端盖，121a-极柱，122-壳体，123-电极组件，13-端板，131-定位孔，14-汇流组件，141-检测孔，2-控制器，3-马达，4-焊前寻址机构，41-第一视觉拍摄器，5-焊接机构，51-第二视觉拍摄器，52-焊接装置，6-焊后检测机构，61-第三视觉拍摄器，62-电子测量仪，7-流水线，X-第一方向，Y-第二方向，Z-第三方向。
具体实施方式
为使本申请实施例的目的、技术方案和优点更加清楚，下面将结合本申请实施例中的附图，对本申请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申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，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它实施例，都属于本申请保护的范围。
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；本文中在申请的说明书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，意图在于覆盖而不排除其它的内容。单词“一”或“一个”并不排除存在多个。
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“实施例”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。
本文中术语“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。
下述描述中出现的方位词均为图中示出的方向，并不是对本申请的电池、用电装置和焊偏检测装置的具体结构进行限定。例如，在本申请的描述中，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的限制。
此外，诸如X方向、Y方向以及Z方向等用于说明本实施例的电池、用电装置和焊偏检测装置的各构件的操作和构造的指示方向的表述不是绝对的而是相对的，且尽管当电池包的各构件处于图中所示的位置时这些指示是恰当的，但是当这些位置改变时，这些方向应有不同的解释，以对应所述改变。
此外，本申请的说明书和权利要求书或上述附图中的术语“第一”、“第二”等是用于区别不同对象，而不是用于描述特定顺序，可以明示或者隐含地包括一个或者更多个该特征。
在本申请的描述中，除非另有说明，“多个”的含义是指两个以上(包括两个)，同理，“多组”指的是两组以上(包括两组)。
在本申请的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，机械结构的“相连”或“连接”可以是指物理上的连接，例如，物理上的连接可以是固定连接，例如通过固定件固定连接，例如通过螺丝、螺栓或其它固定件固定连接；物理上的连接也可以是可拆卸连接，例如相互卡接或卡合连接；物理上的连接也可以是一体地连接，例如，焊接、粘接或一体成型形成连接进行连接。电路结构的“相连”或“连接”除了可以是指物理上的连接，还可以是指电连接或信号连接，例如，可以是直接相连，即物理连接，也可以通过中间至少一个元件间接相连，只要达到电路相通即可，还可以是两个元件内部的连通； 信号连接除了可以通过电路进行信号连接外，也可以是指通过媒体介质进行信号连接，例如，无线电波。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本申请中的具体含义。
在动力电池的生产过程中，常将多个电池单体组装成电池组，然后将汇流组件贴在电池组中多个电池单体的极柱上，按照预定设计将汇流组件与极柱焊接起来，以通过汇流组件导通多个极柱，从而将多个电池单体电连接。
相关技术中，将电池组置于电池模组焊接定位装置上，通过电池模组焊接定位装置将电池组定位在焊接位上。然后，将一块盖板覆盖至焊接位上电池组的汇流组件上，使盖板上的压筒与极柱对端，通过压筒向汇流组件施加压紧力，以将汇流组件与极柱压紧。之后，在压筒内对汇流组件与极柱进行焊接。
发明人发现，通过相关技术的电池模组焊接定位装置可以提高压筒与极柱的精准对位，使得汇流组件与极柱紧密贴合，从而减少汇流组件与极柱焊接时出现焊偏、虚焊的几率。然而，由于电池模组焊接定位装置中各工件的制造误差、装配误差等因素均会导致盖板压筒和极柱无法很好对准，致使定位精确度不高，也会引发焊偏、虚焊等问题。可见，相关技术只能从定位装置上来改善焊接位置的精准度，但无法避免焊偏情况的发生，也无法对焊接情况进行检测。
基于此，本申请实施例提供一种焊偏检测装置，包括：焊前寻址机构、焊接机构和焊后检测机构。焊前寻址机构可以确定电池中定位孔与多个极柱的相对位置关系，并将相对位置关系发送给焊接机构和焊后检测机构。焊接机构可以检测定位孔的第一位置，基于定位孔的第一位置和接收的相对位置关系确定出多个极柱的第一位置，因此焊接机构可以基于多个极柱的第一位置准确焊接汇流组件与多个极柱，以形成多个焊缝。焊后检测机构可以检测定位孔的第二位置和多个焊缝的位置，基于定位孔的第二位置、多个焊缝的位置，以及接收的相对位置关系检测汇流组件与极柱的焊偏情况。本申请实施例不仅可以通过焊接机构准确焊接汇流组件与多个极柱，还可以通过焊后检测机构简便、及时检测出焊偏情况。
本申请实施例描述的焊偏检测装置可以对电池中极柱与汇流组件的焊偏情况进行检测，因此适用于电池以及使用电池的用电装置。
电池是指包括一个或多个电池单体以提供更高的电压和容量的单一的物理模块。例如，本申请中所提到的电池可以包括电池模块或电池包等。且本申请中所提到的电池可以是圆柱电池。电池一般包括用于封装一个或多个电池单体的电池箱体。电池箱体可以避免液体或其他异物影响电池单体的充电或放电。
用电装置可以是汽车、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。汽车可以是燃油汽车、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。
以下实施例为了方便说明，以用电装置为汽车为例进行说明。
请参见图1，图1为本申请一些实施例提供的汽车00的结构示意图。
如图1所示，汽车00可以为燃油汽车、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。汽车00包括电池1、控制器2和马达3。电池1用于向控制器2和马达3供电，作为汽车00的操作电源和驱动电源，例如，电池1用于汽车00的启动、导航和运行时的工作用电需求。例如，电池1向控制器2供电，控制器2控制电池1向马达3供电，马达3接收并使用电池1的电力作为汽车00的驱动电源，替代或部分地替代燃油或天然气为汽车00提供驱动动力。
请参见图2，图2为本申请一些实施例提供的电池1的爆炸示意图。
如图2所示，电池1包括箱体11和电池单体12。箱体11用于容纳电池单体12，箱体11可以是多种结构。在一些实施例中，箱体11可以包括第一箱体部11a和第二箱体部11b，第一箱体部11a与第二箱体部11b相互盖合，第一箱体部11a和第二箱体部11b共同限定出用于容纳电池单体12的内部空间11c。第二箱体部11b可以是一端开口的空心结构，第一箱体部11a为板状结构，第一箱体部11a盖合于第二箱体部11b的开口侧，以形成具有内部空 间11c的箱体11；第一箱体部11a和第二箱体部11b也均可以是一侧开口的空心结构，第一箱体部11a的开口侧盖合于第二箱体部11b的开口侧，以形成具有内部空间11c的箱体11。当然，第一箱体部11a和第二箱体部11b可以是多种形状，比如，圆柱体、长方体等。
假设第一箱体部11a盖合于第二箱体部11b的顶部，第一箱体部11a亦可称之为上箱盖，第二箱体部11b亦可称之为下箱体。
在图2中，电池单体12为多个。多个电池单体12之间可串联或并联或混联，混联是指多个电池单体12中既有串联又有并联。多个电池单体12之间可直接串联或并联或混联在一起，再将多个电池单体12构成的整体容纳于箱体11内；当然，也可以是多个电池单体12先串联或并联或混联组成电池模块，多个电池模块再串联或并联或混联形成一个整体，并容纳于箱体11内。在一些实施例中，电池单体12为多个，多个电池单体12先串联或并联或混联组成电池模块。多个电池模块再串联或并联或混联形成一个整体，并容纳于箱体11内。
请参见图3，图3为本申请一些实施例提供的电池单体12的结构示意图。
图3为本申请一些实施例提供的电池单体12的分解结构示意图。电池单体12是指组成电池的最小单元。如图3，电池单体12包括有端盖121、壳体122和电极组件123。
端盖121是指盖合于壳体122的开口处以将电池单体12的内部环境隔绝于外部环境的部件。不限地，端盖121的形状可以与壳体122的形状相适应以配合壳体122。可选地，端盖121可以由具有一定硬度和强度的材质(如铝合金)制成，这样，端盖121在受挤压碰撞时就不易发生形变，使电池单体12能够具备更高的结构强度，安全性能也可以有所提高。端盖121上可以设置有如极柱121a等的功能性部件。极柱121a可以用于与电极组件123电连接，以用于输出或输入电池单体12的电能。在一些实施例中，端盖121上还可以设置有用于在电池单体12的内部压力或温度达到阈值时泄放内部压力的泄压机构。端盖121的材质也可以是多种的，比如，铜、铁、铝、不锈钢、铝合金、塑胶等，本申请实施例对此不作特殊限制。在一些实施例中，在端盖121的内侧还可以设置有绝缘件，绝缘件可以用于隔离壳体122内的 电连接部件与端盖121，以降低短路的风险。示例性的，绝缘件可以是塑料、橡胶等。
壳体122是用于配合端盖121以形成电池单体12的内部环境的组件，其中，形成的内部环境可以用于容纳电极组件123、电解液(在图中未示出)以及其他部件。壳体122和端盖121可以是独立的部件，可以于壳体122上设置开口，通过在开口处使端盖121盖合开口以形成电池单体12的内部环境。不限地，也可以使端盖121和壳体122一体化，具体地，端盖121和壳体122可以在其他部件入壳前先形成一个共同的连接面，当需要封装壳体122的内部时，再使端盖121盖合壳体122。壳体122可以是多种形状和多种尺寸的，例如长方体形、圆柱体形、六棱柱形等。具体地，壳体122的形状可以根据电极组件123的具体形状和尺寸大小来确定。壳体122的材质可以是多种，比如，铜、铁、铝、不锈钢、铝合金、塑胶等，本申请实施例对此不作特殊限制。
电极组件123是电池单体12中发生电化学反应的部件。壳体122内可以包含一个或更多个电极组件123。电极组件123主要由正极片和负极片卷绕或层叠放置形成，并且通常在正极片与负极片之间设有隔膜。正极片和负极片具有活性物质的部分构成电芯组件的主体部，正极片和负极片不具有活性物质的部分各自构成极耳(在图中未示出)。正极极耳和负极极耳可以共同位于主体部的一端或是分别位于主体部的两端。在电池的充放电过程中，正极活性物质和负极活性物质与电解液发生反应，极耳连接极柱121a以形成电流回路。
为了便于对焊偏检测装置的描述，下面先结合附图对本申请实施例提供的电池1进行详细解释说明，后面再结合电池1的结构对本申请提供的焊偏检测装置进行解释说明。在这里需要说明的是，本申请实施例提供的电池1可以通过后面实施例中的焊偏检测装置及焊偏检测方法对该电池1中极柱121a与汇流组件14的焊偏情况进行检测。
图4为本申请实施例提供的一种电池1的结构示意图，图5为本申请实施例提供的另一种电池1的结构示意图，其中图4未示出汇流组件14，而图5示出了汇流组件14。如图4和图5所示，该电池1包括端板13和汇流组件14。端板13沿第一方向X设置有定位孔131，定位孔131用于定位多 个电池单体12的极柱121a。汇流组件14基于定位孔131的定位与极柱121a焊接，汇流组件14用于将多个电池单体12电连接。
本申请实施例提供的电池1包括两个位置相对的端板13，这两个端板13的结构可以相同，也可以不相同。多个电池单体12沿电池1的长度方向堆叠后，两个端板13沿电池1的长度方向位于该多个电池单体12的两端，以沿电池1的长度方向对该多个电池单体12进行限位。在这两个端板13对多个电池单体12限位之后，端板13上的定位孔131与每个电池单体12的极柱121a之间的相对位置固定不变，因此可以通过定位孔131来定位多个电池单体12的极柱121a，换句话说，通过定位孔131的位置来确定多个极柱121a的位置。其中，定位孔131可以是圆孔、方孔等，定位孔131可以是端板13沿第一方向X设置的通孔，也可以是端板13沿第一方向X设置的盲孔。定位孔131的位置可以是定位孔131在平面坐标系中的位置坐标，极柱121a的位置可以是极柱121a在同一平面坐标系中的位置坐标，该平面坐标系可以是以电池1的长度方向为横轴/纵轴，以电池1的宽度方向为纵轴/横轴，以电池1朝汇流组件14的一端所在的平面中任意一点为原点建立的坐标系。
两个端板13中至少一个端板13沿第一方向X可以设置有定位孔131，通过任一定位孔131均可以定位多个电池单体12的极柱121a。示例地，可以仅沿第一方向X在第一个端板13上设置定位孔131，通过第一个端板13上的定位孔131定位多个极柱121a；或者，可以仅沿第一方向X在第二个端板13上设置定位孔131，通过第二个端板13上的定位孔131定位多个极柱121a；或者，还可以沿第一方向X在这两个端板13上均设置定位孔131，同时通过这两个端板13上的定位孔131定位多个极柱121a。其中，第一方向X是电池1的高度方向，第一方向X的标注可以参考图6。
汇流组件14大致呈矩形板状。多个电池单体12堆叠后，这多个电池单体12的极柱121a互相没有连接，如果将汇流组件14与极柱121a焊接起来，可以导通相邻多个电池单体12的极柱121a，从而使相邻多个电池单体12电连接。在焊接汇流组件14与极柱121a时，汇流组件14覆盖在多个极柱121a上，使得焊接装置52很难找到极柱121a的位置。但由于汇流组件14仅覆盖极柱121a而不覆盖端板13，因此可以基于端板13上的定位孔131定位被覆盖的极柱121a，从而便于焊接装置52准确将汇流组件14与多个极柱 121a焊接起来。
本申请实施例中，在端板13上设置定位孔131，由于端板13与所限位的多个电池单体12的相对位置固定不变，所以端板13上定位孔131与该多个电池单体12中极柱121a的相对位置固定不变，因此可以通过定位孔131来定位多个电池单体12的极柱121a。即便汇流组件14覆盖在多个极柱121a上，通过定位孔131也可以准确定位多个极柱121a，从而可以为焊接汇流排与极柱121a提供定位参考，便于准确焊接汇流组件14与极柱121a。定位孔131后续还可以为检测汇流组件14与极柱121a的焊偏情况提供位置参考。另外，定位孔131的设置，可以让极柱121a无需开孔，使得极柱121a表面完整，可以提供更大的可焊面积。
一般地，电池1在传送皮带上从流水线7的上一工位流至下一工位，在传送皮带传送过程中，电池1难免由于振动等原因在传送皮带上发生旋转。为避免仅在一个端板13上设置定位孔131，且仅设置一个定位孔131，电池1在流至焊接工位前发生旋转时，通过一个定位孔131无法对多个极柱121a准确定位，在一些实施例中，可以将定位孔131的数量设置为两个，两个定位孔131沿第二方向Y和第三方向Z均错位分布，第二方向Y、第三方向Z与第一方向X相互垂直。
这里需要说明的是，第二方向Y和第三方向Z可以分别为电池1的长度方向和宽度方向。例如，第二方向Y为电池1的长度方向，第三方向Z为电池1的宽度方向。
对于任意一个端板13，端板13上设置的定位孔131的数量均可以是两个。
当只有一个端板13上设置有两个定位孔131时，这两个定位孔131沿第二方向Y和第三方向Z均可以错位分布，这种情况下，在以第二方向Y和第三方向Z为坐标轴建立的同一平面坐标系中，这两个定位孔131的横坐标不相同，纵坐标也不相同。
当两个端板13上均设置有两个定位孔131时，第一个端板13上的两个定位孔131沿第二方向Y和第三方向Z均可以错位分布，第二个端板13上的两个定位孔131沿第二方向Y和第三方向Z也可以错位分布。进一步地，这两个端板13上的四个定位孔131沿第二方向Y和第三方向Z均可以错位 分布，这种情况下，在以第二方向Y和第三方向Z为坐标轴建立的同一平面坐标系中，这四个定位孔131的横坐标不相同，纵坐标也不相同。这样，可以从四个方位对极柱121a进行定位，提高了极柱121a定位的准确度。
可以理解的是，对于任意一个端板13，端板13上设置的定位孔131的数量也可以是三个以上，本申请实施例对端板13上定位孔131的数量不作限定。但是，端板13上设置的定位孔131过多，容易影响端板13的结构强度，且会增加基于定位孔131的位置确定极柱121a位置的工作量，因此，可以根据端板13的强度要求，以及其他实际情况合理设置定位孔131的数量，例如，优选地，可以将一个端板13上的定位孔131的数量设置为两个。
将定位孔131的数量设置为两个，且两个定位孔131沿第二方向Y和第三方向Z均错位分布，这样，两个定位孔131可以从不同方位对极柱121a进行定位，提高了极柱121a定位的准确度。
在一些实施例中，如图5所示，汇流组件14与极柱121a对应的部位设置有检测孔141，检测孔141被配置为允许通过检测孔141检测极柱121a与汇流组件14之间的贴合间隙，检测孔141的孔径为1.5mm～2mm。
汇流组件14沿第一方向X覆盖在极柱121a上，沿第一方向X焊接汇流组件14与极柱121a之后，汇流组件14与极柱121a之间可能留有间隙，即贴合间隙，当该间隙大小超过一定范围，则认为焊接质量不符合要求，因此，有必要对极柱121a与汇流组件14之间的贴合间隙进行检测。
检测孔141可以是圆孔、方孔等。检测孔141设置在汇流组件14上与极柱121a对应的位置，检测孔141的数量与极柱121a的数量相同，多个检测孔141与多个极柱121a的位置一一对应。检测孔141的孔径可以根据检测仪的检测要求来设置，例如，检测孔141的孔径可以是1.5mm～2mm。但是值得指出的是，检测孔141的孔径越大，汇流组件14与极柱121a的接触面越小，焊接时的焊接区面积越小，焊接质量越不好，因此检测孔141的孔径不宜过大，在保证检测要求的前提下，可以将检测孔141的孔径设置的较小。
在汇流组件14与极柱121a对应的部位设置检测孔141，便于检测仪通过检测孔141检测极柱121a与汇流组件14之间的贴合间隙。将检测孔141的孔径设置为1.5mm～2mm，既可以满足检测仪的检测要求，也不至于因检测孔141的孔径过大而影响焊接质量。
下面结合附图对本申请实施例提供的焊偏检测装置进行解释说明。
图6为本申请实施例提供的一种焊偏检测装置的结构示意图，如图6所示，该焊偏检测装置包括焊前寻址机构4、焊接机构5和焊后检测机构6。焊前寻址机构4用于确定电池1中定位孔131与多个极柱121a的相对位置关系，并将相对位置关系发送给焊接机构5和焊后检测机构6，定位孔131沿第一方向X设置于电池1的端板13上。焊接机构5用于检测定位孔131的第一位置，基于定位孔131的第一位置和接收的相对位置关系确定多个极柱121a的第一位置，基于多个极柱121a的第一位置焊接汇流组件14与多个极柱121a，以形成多个焊缝。焊后检测机构6用于检测定位孔131的第二位置和多个焊缝的位置，基于定位孔131的第二位置、多个焊缝的位置，以及接收的相对位置关系检测汇流组件14与极柱121a的焊偏情况。
焊前寻址机构4在流水线7上位于焊接机构5的上游，焊后检测机构6在流水线7上位于焊接机构5的下游。焊前寻址机构4、焊接机构5和焊后检测机构6相当于流水线7上从上游至下游的三个工位，焊前寻址机构4中极柱121a上没有覆盖汇流组件14，极柱121a和端板13均裸露在外，因此焊前检测机构可以确定定位孔131与多个极柱121a的相对位置关系。焊接机构5和焊后检测机构6中极柱121a上覆盖有汇流组件14，极柱121a和端板13中只有端板13裸露在外，所以焊接机构5和焊后检测机构6只能检测端板13上定位孔131的位置，无法直接检测每个极柱121a的位置。当焊接机构5接收到焊前寻址机构4发送的相对位置关系时，可以根据检测到的定位孔131的位置和接收的相对位置关系，确定出焊接机构5中每个极柱121a的位置。当焊后检测机构6接收到焊前寻址机构4发送的相对位置关系时，可以根据检测到的定位孔131的位置和接收的相对位置关系，确定出焊后检测机构6中每个极柱121a的位置。
为了便于描述，将焊接机构5中定位孔131的位置记为定位孔131的第一位置，将焊接机构5中极柱121a的位置记为极柱121a的第一位置；将焊后检测机构6中定位孔131的位置记为定位孔131的第二位置，将焊后检测机构6中极柱121a的位置记为极柱121a的第二位置。
基于上面实施例的描述可知，电池1中至少一个端板13上可以设置有定位孔131，且一个端板13上可以设置至少一个定位孔131。本实施例中， 焊前寻址机构4可以确定每个端板13上的任一定位孔131与多个极柱121a的相对位置关系。例如，当第一个端板13上设置有一个定位孔131，第二个端板13上设置有两个定位孔131，极柱121a的数量为6个时，焊前寻址机构4可以确定第一个端板13上的那个定位孔131与这6个极柱121a的相对位置关系，还可以确定第二个端板13上的第一个定位孔131与这6个极柱121a的相对位置关系，以及确定第二个端板13上的第二个定位孔131与这6个极柱121a的相对位置关系。之后，焊前寻址机构4可以将确定出的每个定位孔131与每个极柱121a的相对位置关系发送给焊接机构5和焊后检测机构6。
焊接机构5可以检测焊接机构5中每个端板13上每个定位孔131的第一位置，基于每个定位孔131的第一位置和接收的相对位置关系，确定每个极柱121a的第一位置，以便基于确定出的每个极柱121a的第一位置准确焊接汇流组件14与每个极柱121a。每将汇流组件14与一个极柱121a焊接起来，便可得到一个焊缝，可见焊缝的数量与极柱121a的数量相同，焊缝的位置与极柱121a的位置相对应。
焊后检测机构6中汇流组件14已经与所有极柱121a焊接完毕，焊后检测机构6可以检测焊后机构中每个端板13上每个定位孔131的第二位置，基于每个定位孔131的第二位置和接收的相对位置关系，确定每个极柱121a的第二位置。焊后检测机构6还可以检测每个焊缝的位置。之后，焊后检测机构6可以基于每个极柱121a的第二位置和每个焊缝的位置检测汇流组件14与极柱121a的焊偏情况。
本申请实施例中，焊前寻址机构4可以确定电池1中定位孔131与多个极柱121a的相对位置关系，并将相对位置关系发送给焊接机构5和焊后检测机构6。焊接机构5可以检测定位孔131的第一位置，基于定位孔131的第一位置和接收的相对位置关系确定出多个极柱121a的第一位置，因此焊接机构5可以基于多个极柱121a的第一位置准确焊接汇流组件14与多个极柱121a，以形成多个焊缝。焊后检测机构6可以检测定位孔131的第二位置和多个焊缝的位置，基于定位孔131的第二位置、多个焊缝的位置，以及接收的相对位置关系检测汇流组件14与极柱121a的焊偏情况。本申请实施例不仅可以通过焊接机构5准确焊接汇流组件14与多个极柱121a，还可以通过焊后检测机构6简便、及时检测出焊偏情况。
在一些实施例中，如图6所示，焊前寻址机构4包括第一视觉拍摄器41，用于检测定位孔131的位置和多个极柱121a的位置，基于定位孔131的位置和多个极柱121a的位置确定相对位置关系，并将相对位置关系发送给焊接机构5和焊后检测机构6。
第一视觉拍摄器41可以是任何可以进行视觉拍摄定位的器件，例如，可以是CCD(charge coupled device，电荷耦合器件)相机。当装配好的电池组进入焊前寻址机构4，第一视觉拍摄器41可以对端板13上的定位孔131和极柱121a进拍照，检测出每个端板13上每个定位孔131的位置和每个极柱121a的位置。当定位孔131的数量有m个，极柱121a的数量有n个，则第一视觉拍摄器41可以检测出这m个定位孔131的位置和这n个极柱121a的位置，并可以基于这m个定位孔131的位置和这n个极柱121a的位置确定出m*n个相对位置关系。之后，可以将这m*n个相对位置关系发送给焊接机构5和焊后检测机构6。
第一视觉拍摄器41可以以第二方向Y为横轴/纵轴，以第三方向Z为纵轴/横轴，以电池1朝汇流组件14的一端所在的平面中任意一点为原点建立平面坐标系。之后，在焊前寻址机构4中检测定位孔131在该平面坐标系中的位置坐标和每个极柱121a在该平面坐标系中的位置坐标；计算每个极柱121a与定位孔131在第二方向Y和第三方向Z上的间距。定位孔131与多个极柱121a的相对位置关系包括定位孔131与极柱121a在第二方向Y和第三方向Z上的间距。
以通过两个定位孔131定位两个极柱121a为例，假设以端板13上的某点为坐标原点，以第二方向Y为横轴，以第三方向Z为纵轴建立平面坐标系。在建立的坐标系中，第一个定位孔131的位置坐标为(X1，Y1)，第二个定位孔131的位置坐标为(X2，Y2)，第一个极柱121a的位置坐标为(M1，N1)，第二个极柱121a的位置坐标为(M2，N2)。
则第一个定位孔131与第一个极柱121a的位置关系包括：第一个定位孔131与第一个极柱121a在第二方向Y上的间距为M1-X1，第一个定位孔131与第一个极柱121a在第三方向Z上的间距为N1-Y1。第一个定位孔131与第二个极柱121a的位置关系包括：第一个定位孔131与第二个极柱121a在第二方向Y上的间距为M2-X1，第一个定位孔131与第二个极柱121a在 第三方向Z上的间距为N2-Y1。
第二个定位孔131与第一个极柱121a的位置关系包括：第二个定位孔131与第一个极柱121a在第二方向Y上的间距为M1-X2，第二个定位孔131与第一个极柱121a在第三方向Z上的间距为N1-Y2。第二个定位孔131与第二个极柱121a的位置关系包括：第二个定位孔131与第二个极柱121a在第二方向Y上的间距为M2-X2，第二个定位孔131与第一个极柱121a在第三方向Z上的间距为N2-Y2。
通过第一视觉拍摄器41，可以在焊前寻址机构4中检测定位孔131的位置和多个极柱121a的位置，基于定位孔131的位置和多个极柱121a的位置确定相对位置关系，并将相对位置关系发送给焊接机构5和焊后检测机构6，可以便于焊接机构5和焊后检测机构6准确确定每个极柱121a的位置。
在一些实施例中，如图6所示，焊接机构5包括第二视觉拍摄器51和焊接装置52。第二视觉拍摄器51用于检测定位孔131的第一位置和接收相对位置关系，基于定位孔131的第一位置和相对位置关系确定多个极柱121a的第一位置，并将多个极柱121a的第一位置发送给焊接装置52。焊接装置52用于接收多个极柱121a的第一位置，并基于多个极柱121a的第一位置焊接汇流组件14与多个极柱121a。
第二视觉拍摄器51的结构可以与第一视觉拍摄器41的结构相同。第二视觉拍摄器51可以与第一视觉拍摄器41电连接，以便接收第一视觉拍摄器41发送的相对位置关系。
第二视觉拍摄器51可以以第二方向Y为横轴/纵轴，以第三方向Z为纵轴/横轴，以电池1朝汇流组件14的一端所在的平面中任意一点为原点建立平面坐标系。当电池组随流水线7进入焊接机构5时，第二视觉拍摄器51可以对端板13上的定位孔131进拍照，在焊接机构5中检测每个定位孔131在该平面坐标系中的位置坐标，即定位孔131的第一位置。然后基于定位孔131的第一位置和接收的相对位置关系计算每个极柱121a在该平面坐标系中的位置坐标，即极柱121a的第一位置。第二视觉拍摄器51还可以与焊接装置52电连接，以便将每个极柱121a的第一位置发送给焊接装置52。其中，焊接装置52可以是激光焊接振镜头，用于实现激光的准直与聚焦，实现对极柱121a与汇流组件14的焊接。
当定位孔131的数量有m个，极柱121a的数量有n个，则第二视觉拍摄器51可以检测出这m个定位孔131的第一位置，并可以基于这m个定位孔131的第一位置和m*n个相对位置关系确定出这n个极柱121a的第一位置。之后，可以将这n个极柱121a的第一位置发送给焊接装置52。
通过第二视觉拍摄器51，可以在焊接机构5中检测定位孔131的第一位置和接收第一视觉拍摄器41发送的相对位置关系，基于定位孔131的第一位置和相对位置关系确定多个极柱121a的第一位置，并将多个极柱121a的第一位置发送给焊接装置52。相应地，焊接装置52可以接收多个极柱121a的第一位置，并基于多个极柱121a的第一位置焊接汇流组件14与多个极柱121a，通过焊接装置52可以准确焊接汇流组件14与多个极柱121a。
在一些实施例中，如图6所示，焊后检测机构6包括第三视觉拍摄器61，用于检测定位孔131的第二位置和多个焊缝的位置，以及接收相对位置关系，基于定位孔131的第二位置和相对位置关系确定多个极柱121a的第二位置，并基于多个极柱121a的第二位置和多个焊缝的位置检测汇流组件14与极柱121a的焊偏情况。
第三视觉拍摄器61的结构可以与第一视觉拍摄器41、第二视觉拍摄器51的结构相同。第三视觉拍摄器61可以与第一视觉拍摄器41电连接，以便接收第一视觉拍摄器41发送的相对位置关系。
第三视觉拍摄器61可以以第二方向Y为横轴/纵轴，以第三方向Z为纵轴/横轴，以电池1朝汇流组件14的一端所在的平面中任意一点为原点建立平面坐标系。在焊接机构5中将极柱121a与汇流组件14焊接之后，电池组随流水线7进入焊后检测机构6，在焊后检测机构6中，第三视觉拍摄器61可以对端板13上的定位孔131进拍照，在焊后检测机构6中检测每个定位孔131在该平面坐标系中的位置坐标，即定位孔131的第二位置。然后基于定位孔131的第二位置和接收的相对位置关系计算每个极柱121a在该平面坐标系中的位置坐标，即极柱121a的第二位置。第三视觉拍摄器61还可以在焊后检测机构6中检测每个焊缝的位置，之后将每个极柱121a的第二位置与对应焊缝的位置进行比较来检测汇流组件14与极柱121a的焊偏情况。其中，当焊缝是圆形时，某焊缝的位置可以是这个焊缝的圆心的位置坐标。
示例地，当定位孔131的数量有m个，极柱121a的数量有n个，则 第三视觉拍摄器61可以检测出这m个定位孔131的第二位置，并可以基于这m个定位孔131的第二位置和m*n个相对位置关系确定出这n个极柱121a的第二位置。第三视觉拍摄器61还可以在焊后检测机构6中检测n个焊缝的位置，之后，可以基于这n个极柱121a的第二位置和这n个焊缝的位置检测汇流组件14与这n个极柱121a的焊偏情况。
第三视觉拍摄器61中可以预存有极柱121a的位置与焊缝的位置在第二方向Y上的第一间距阈值，以及在第三方向Z上的第二间距阈值。第三视觉拍摄器61在将每个极柱121a的第二位置与对应焊缝的位置进行比较来检测汇流组件14与极柱121a的焊偏情况时，以某个极柱121a与对应焊缝为例，可以确定该极柱121a的第二位置与对应焊缝的位置在第二方向Y上的第一间距，确定该极柱121a的第二位置与对应焊缝的位置在第三方向Z上的第二间距。如果第一间距超过第一间距阈值，和/或，第二间距超过第二间距阈值，则确定该极柱121a与对应焊缝偏离，从而可以确定汇流组件14与该极柱121a存在焊偏情况。反之，可以确定汇流组件14与该极柱121a不存在焊偏情况。
通过第三视觉拍摄器61，可以在焊后检测机构6中检测定位孔131的第二位置和多个焊缝的位置，以及接收第一视觉拍摄器41发送的相对位置关系，基于定位孔131的第二位置和相对位置关系确定多个极柱121a的第二位置，并基于多个极柱121a的第二位置和焊缝的位置检测汇流组件14与极柱121a的焊偏情况，从而实现对焊接质量的很好监控。
在一些实施例中，如图6所示，焊后检测机构6还可以包括电子测量仪62，用于通过检测孔141检测极柱121a与汇流组件14之间的贴合间隙。
电子测量仪62可以是三维轮廓仪等。以三维轮廓仪为例，三维轮廓仪具有信号发射端和信号接收端，信号发射端和信号接收端有一定的夹角，三维轮廓仪的信号发射端可以将信号通过检测孔141发送至信号接收端，之后通过信号接收端的反馈确定极柱121a与汇流组件14之间的贴合间隙。其中，贴合间隙指的是极柱121a与汇流组件14在第一方向X上的间距。每个极柱121a与汇流组件14在第一方向X上均具有贴合间隙，因此贴合间隙的数量与极柱121a的数量一致。
示例地，当极柱121a的数量有n个，n个极柱121a与汇流组件14之间具有n个贴合间隙。电子测量仪62可以通过汇流组件14上的n个检测孔 141分别检测这n个极柱121a与汇流组件14之间的n个贴合间隙。之后，可以对这n个贴合间隙进行评价，进而评价这n个极柱121a与汇流组件14的焊接质量。
电子测量仪62中可以预存有极柱121a与汇流组件14之间的间隙阈值。电子测量仪62在通过汇流组件14上的n个检测孔141分别检测这n个极柱121a与汇流组件14之间的n个贴合间隙时，以某个极柱121a与汇流组件14为例，可以将该极柱121a与汇流组件14之间的贴合间隙与间隙阈值进行比较。如果该极柱121a与汇流组件14之间的贴合间隙大于间隙阈值，则认为该极柱121a与汇流组件14之间的贴合间隙较大，确定该极柱121a与汇流组件14的焊接质量不佳。反之，可以确定该极柱121a与汇流组件14的焊接质量较好。
通过电子测量仪62可以在焊后检测机构6中通过检测孔141检测每个极柱121a与汇流组件14之间的贴合间隙，继而可以基于该贴合间隙评价每个极柱121a与汇流组件14的焊接质量，实现对焊接质量的很好监控。
本申请实施例还提供了一种焊偏检测方法，可以应用于前面实施例中的焊偏检测装置，如图7所示，该方法包括：
S1：通过焊前寻址机构4确定电池1中定位孔131与多个极柱121a的相对位置关系，并将相对位置关系发送给焊接机构5和焊后检测机构6。
S2：通过焊接机构5检测定位孔131的第一位置，基于定位孔131的第一位置和接收的相对位置关系确定多个极柱121a的第一位置，基于多个极柱121a的第一位置焊接汇流组件14与多个极柱121a，以形成多个焊缝。
S3：通过焊后检测机构6检测定位孔131的第二位置和多个焊缝的位置，基于定位孔131的第二位置、多个焊缝的位置，以及接收的相对位置关系检测汇流组件14与极柱121a的焊偏情况。
本申请实施例中，通过焊前寻址机构4可以确定电池1中定位孔131与多个极柱121a的相对位置关系，并将相对位置关系发送给焊接机构5和焊后检测机构6。通过焊接机构5可以检测定位孔131的第一位置，基于定位孔131的第一位置和接收的相对位置关系确定出多个极柱121a的第一位置，因此焊接机构5可以基于多个极柱121a的第一位置准确焊接汇流组件14与多个极柱121a，以形成多个焊缝。通过焊后检测机构6可以检测定位孔131 的第二位置和多个焊缝的位置，基于定位孔131的第二位置、多个焊缝的位置，以及接收的相对位置关系检测汇流组件14与极柱121a的焊偏情况。本申请实施例不仅可以通过焊接机构5准确焊接汇流组件14与多个极柱121a，还可以通过焊后检测机构6简便、及时检测出焊偏情况。
在一些实施例中，当焊前寻址机构4包括第一视觉拍摄器41时，该焊偏检测方法可以包括：通过第一视觉拍摄器41检测定位孔131的位置和多个极柱121a的位置，基于定位孔131的位置和多个极柱121a的位置确定相对位置关系，并将相对位置关系发送给焊接机构5和焊后检测机构6。
在一些实施例中，当焊接机构5包括第二视觉拍摄器51和焊接装置52时，该焊偏检测方法可以包括：通过第二视觉拍摄器51检测定位孔131的第一位置和接收相对位置关系，基于定位孔131的第一位置和相对位置关系确定多个极柱121a的第一位置，并将多个极柱121a的第一位置发送给焊接装置52；通过焊接装置52接收多个极柱121a的第一位置，并基于多个极柱121a的第一位置焊接汇流组件14与多个极柱121a。
在一些实施例中，当焊接机构5包括第三视觉拍摄器61时，该焊偏检测方法可以包括：通过第三视觉拍摄器61检测定位孔131的第二位置和多个焊缝的位置，以及接收相对位置关系，基于定位孔131的第二位置和相对位置关系确定多个极柱121a的第二位置，并基于多个极柱121a的第二位置和多个焊缝的位置检测汇流组件14与极柱121a的焊偏情况。
在一些实施例中，当焊接机构5包括电子测量仪62时，该焊偏检测方法可以包括：通过电子测量仪62检测孔141检测极柱121a与汇流组件14之间的贴合间隙。
上述焊偏检测方法与前面实施例中的焊偏检测装置相对应，该焊偏检测方法中各步骤的细节已经在对应的焊偏检测装置实施例中进行了详细的描述，对于焊偏检测方法中各步骤的解释，可以参考焊偏检测装置实施例中的相关描述，此处不再赘述。
根据本申请的一些实施例，本申请实施例还提供一种用电装置，包括前面实施例中的电池1，并且电池1用于为用电装置提供电能。
用电装置可以是前述任一应用电池1的设备或系统。并且，用电装置可以通过前面实施例中的焊偏检测装置和焊偏检测方法对电池1中极柱121a 与汇流组件14的焊偏情况进行检测。
根据本申请的一些实施例，参见图6，本申请提供了一种焊偏检测装置，包括焊前寻址机构4、焊接机构5和焊后检测机构6。其中焊前寻址机构4包括第一视觉拍摄器41，焊接机构5包括第二视觉拍摄器51和焊接装置52，焊后检测机构6包括第三视觉拍摄器61和电子测量仪62。第二视觉拍摄器51和第三视觉拍摄器61均与第一视觉拍摄器41电连接，第二视觉拍摄器51与焊接装置52电连接。
第一视觉拍摄器41可以检测定位孔131的位置和多个极柱121a的位置，基于定位孔131的位置和多个极柱121a的位置确定相对位置关系，并将相对位置关系发送给焊接机构5和焊后检测机构6。
第二视觉拍摄器51可以检测定位孔131的第一位置和接收相对位置关系，基于定位孔131的第一位置和相对位置关系确定多个极柱121a的第一位置，并将多个极柱121a的第一位置发送给焊接装置52。焊接装置52可以接收多个极柱121a的第一位置，并基于多个极柱121a的第一位置焊接汇流组件14与多个极柱121a。
第三视觉拍摄器61可以检测定位孔131的第二位置和多个焊缝的位置，以及接收相对位置关系，基于定位孔131的第二位置和相对位置关系确定多个极柱121a的第二位置，并基于多个极柱121a的第二位置和多个焊缝的位置检测汇流组件14与极柱121a的焊偏情况。电子测量仪62可以通过检测孔141检测极柱121a与汇流组件14之间的贴合间隙。
本领域的技术人员能够理解，尽管在此的一些实施例包括其它实施例中所包括的某些特征而不是其它特征，但是不同实施例的特征的组合意味着处于本申请的范围之内并且形成不同的实施例。例如，在权利要求书中，所要求保护的实施例的任意之一都可以以任意的组合方式来使用。
以上所述，以上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精神和范围。

Claims (14)

  1. 一种焊偏检测装置，其特征在于，包括：
    焊前寻址机构，用于确定电池中定位孔与多个极柱的相对位置关系，并将所述相对位置关系发送给焊接机构和焊后检测机构，所述定位孔沿第一方向设置于所述电池的端板上；
    焊接机构，用于检测所述定位孔的第一位置，基于所述定位孔的第一位置和接收的所述相对位置关系确定多个所述极柱的第一位置，基于多个所述极柱的第一位置焊接汇流组件与多个所述极柱，以形成多个焊缝；
    焊后检测机构，用于检测所述定位孔的第二位置和多个所述焊缝的位置，基于所述定位孔的第二位置、多个所述焊缝的位置，以及接收的所述相对位置关系检测所述汇流组件与所述极柱的焊偏情况。
  2. 根据权利要求1所述的焊偏检测装置，其特征在于，所述焊前寻址机构包括第一视觉拍摄器，用于检测所述定位孔的位置和多个所述极柱的位置，基于所述定位孔的位置和多个所述极柱的位置确定所述相对位置关系，并将所述相对位置关系发送给所述焊接机构和所述焊后检测机构。
  3. 根据权利要求1所述的焊偏检测装置，其特征在于，所述焊接机构包括：
    第二视觉拍摄器，用于检测所述定位孔的第一位置和接收所述相对位置关系，基于所述定位孔的第一位置和所述相对位置关系确定多个所述极柱的第一位置，并将多个所述极柱的第一位置发送给焊接装置；
    焊接装置，用于接收多个所述极柱的第一位置，并基于多个所述极柱的第一位置焊接所述汇流组件与多个所述极柱。
  4. 根据权利要求1所述的焊偏检测装置，其特征在于，所述焊后检测机构包括第三视觉拍摄器，用于检测所述定位孔的第二位置和多个所述焊缝的位置，以及接收所述相对位置关系，基于所述定位孔的第二位置和所述相对位置关系确定多个所述极柱的第二位置，并基于多个所述极柱的第二位置和多个所述焊缝的位置检测所述汇流组件与所述极柱的焊偏情况。
  5. 根据权利要求1所述的焊偏检测装置，其特征在于，所述焊后检测机构还包括电子测量仪，用于检测所述极柱与所述汇流组件之间的贴合间隙。
  6. 一种焊偏检测方法，应用于如权利要求1-5任一项所述的焊偏检测装 置，其特征在于，包括：
    通过焊前寻址机构确定电池中定位孔与多个极柱的相对位置关系，并将所述相对位置关系发送给焊接机构和焊后检测机构；
    通过焊接机构检测所述定位孔的第一位置，基于所述定位孔的第一位置和接收的所述相对位置关系确定多个所述极柱的第一位置，基于多个所述极柱的第一位置焊接汇流组件与多个所述极柱，以形成多个焊缝；
    通过焊后检测机构检测所述定位孔的第二位置和多个所述焊缝的位置，基于所述定位孔的第二位置、多个所述焊缝的位置，以及接收的所述相对位置关系检测所述汇流组件与所述极柱的焊偏情况。
  7. 根据权利要求6所述的焊偏检测方法，其特征在于，所述焊偏检测方法包括：
    通过第一视觉拍摄器检测所述定位孔的位置和多个所述极柱的位置，基于所述定位孔的位置和多个所述极柱的位置确定所述相对位置关系，并将所述相对位置关系发送给所述焊接机构和所述焊后检测机构。
  8. 根据权利要求6所述的焊偏检测方法，其特征在于，所述焊偏检测方法包括：
    通过第二视觉拍摄器检测所述定位孔的第一位置和接收所述相对位置关系，基于所述定位孔的第一位置和所述相对位置关系确定多个所述极柱的第一位置，并将多个所述极柱的第一位置发送给焊接装置；
    通过焊接装置接收多个所述极柱的第一位置，并基于多个所述极柱的第一位置焊接所述汇流组件与多个所述极柱。
  9. 根据权利要求6所述的焊偏检测方法，其特征在于，所述焊偏检测方法包括：
    通过第三视觉拍摄器检测所述定位孔的第二位置和多个所述焊缝的位置，以及接收所述相对位置关系，基于所述定位孔的第二位置和所述相对位置关系确定多个所述极柱的第二位置，并基于多个所述极柱的第二位置和多个所述焊缝的位置检测所述汇流组件与所述极柱的焊偏情况。
  10. 根据权利要求6所述的焊偏检测方法，其特征在于，所述焊偏检测方法包括：
    通过电子测量仪检测所述极柱与所述汇流组件之间的贴合间隙。
  11. 一种电池，用于通过如权利要求1-5任一项所述的焊偏检测装置对所述电池中极柱与汇流组件的焊偏情况进行检测，其特征在于，包括：
    端板，沿第一方向设置有定位孔，所述定位孔用于定位多个电池单体的极柱；
    汇流组件，基于所述定位孔的定位与所述极柱焊接，所述汇流组件用于将所述多个电池单体电连接。
  12. 根据权利要求11所述的电池，其特征在于，所述定位孔的数量为两个，两个所述定位孔沿第二方向和第三方向均错位分布，所述第二方向、所述第三方向与所述第一方向相互垂直。
  13. 根据权利要求11或12所述的电池，其特征在于，所述汇流组件与所述极柱对应的部位设置有检测孔，所述检测孔被配置为允许通过所述检测孔检测所述极柱与所述汇流组件之间的贴合间隙，所述检测孔的孔径为1.5mm～2mm。
  14. 一种用电装置，其特征在于，包括如权利要求11至13任一项所述的电池。
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