WO2021203691A1 - 铜巴组件、电池模组以及铜巴组件连接方法 - Google Patents

铜巴组件、电池模组以及铜巴组件连接方法 Download PDF

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Publication number
WO2021203691A1
WO2021203691A1 PCT/CN2020/126214 CN2020126214W WO2021203691A1 WO 2021203691 A1 WO2021203691 A1 WO 2021203691A1 CN 2020126214 W CN2020126214 W CN 2020126214W WO 2021203691 A1 WO2021203691 A1 WO 2021203691A1
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WO
WIPO (PCT)
Prior art keywords
copper bar
sleeve
bar assembly
battery
copper
Prior art date
Application number
PCT/CN2020/126214
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English (en)
French (fr)
Inventor
王典运
陈君奕
Original Assignee
赤壁银轮工业换热器有限公司
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Publication of WO2021203691A1 publication Critical patent/WO2021203691A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present disclosure relates to the technical field of new energy batteries, and in particular to a copper-bar assembly, a battery module, and a copper-bar assembly connection method.
  • the battery module of a new energy vehicle includes a circuit board and multiple batteries. Each battery needs to be electrically connected to the circuit board to realize charging or power transmission.
  • the copper bar component is connected between the battery and the circuit board to realize the electrical connection between the battery and the circuit board. connect.
  • the copper bar assembly includes a copper bar, a nut, and a sleeve.
  • the nut includes a nut body and a base.
  • the copper bar is provided with a through hole.
  • the nut body passes through the through hole on the copper bar so that the base and the nut body are located separately
  • the nut body is provided with external threads
  • the sleeve is provided with internal threads
  • the sleeve is screwed on the nut body, so that the copper bar, the nut and the sleeve are connected and fixed.
  • the copper bar is connected with the circuit board, the sleeve is electrically connected with the electrode of the battery, and the nut is connected and fixed with the battery by a bolt.
  • the problem is that, due to assembly errors in the above-mentioned connection method, the impedance value of the copper bar component is large.
  • the purpose of the present disclosure is, for example, to provide a copper-bar assembly, a battery module, and a copper-bar assembly connection method, so as to solve the technical problem of a large impedance value of the copper-bar assembly in the prior art.
  • the present disclosure provides a copper bar assembly, including: a copper bar and a battery connector, the copper bar is provided with a first connection part, the battery connector is provided with a second connection part, and the first connection part and the second connection part are arranged between the first connection part and the second connection part.
  • a solder layer is provided, and the solder layer covers the surface of the first connecting portion and the surface of the second connecting portion.
  • the first connecting portion is provided on the board surface of the copper bar.
  • the battery connector includes a sleeve
  • the first connecting portion includes a first welding surface disposed on the copper bar that abuts against one end of the sleeve
  • the second connecting portion includes a second welding formed by one end surface of the sleeve noodle.
  • an internal thread is provided in the sleeve to be configured to be threadedly connected with the battery; the sleeve is electrically connected with the electrode of the battery.
  • a positioning part configured as a positioning sleeve is provided on the copper bar, and the sleeve and the positioning part are in plug-in fit.
  • the positioning part is configured as a groove, and the sleeve is inserted into the groove.
  • the battery connector further includes a connecting sleeve, and the sleeve is sleeved outside the connecting sleeve;
  • the first connecting portion further includes a third welding surface disposed on the copper bar that abuts against one end of the connecting sleeve, and the second connecting portion further includes a fourth welding surface formed by one end surface of the connecting sleeve.
  • the third welding surface is connected to the fourth welding surface. The welding surface is welded and fixed.
  • a solder layer is provided between the third welding surface and the fourth welding surface, and the solder layer simultaneously covers the third welding surface and the fourth welding surface.
  • the connecting sleeve includes a base and a rod
  • the copper bar is provided with a through hole configured for the rod to pass through
  • the base abuts against the bottom surface of the copper bar
  • the rod protrudes from the top surface of the copper bar.
  • the three welding surfaces are located on the bottom surface of the copper bar
  • the fourth welding surface is located on the side of the base close to the copper bar
  • the sleeve is sleeved outside the rod.
  • the connecting sleeve is provided with a central hole, the central hole penetrates the base and the rod part at the same time, and the central hole extends along the extension direction of the rod part; the central hole is configured to be connected to the battery.
  • the hole wall of the central hole is provided with an internal thread configured to be connected to the battery.
  • a guide part is provided at one end of the rod part away from the base, and the outer diameter of the guide part gradually increases from an end away from the rod part to an end close to the rod part.
  • the copper bar is a flat plate, an L-shaped plate or a Z-shaped plate.
  • the copper bar includes a first plate portion, a second plate portion, and a third plate portion connected in sequence, the first plate portion and the third plate portion are parallel and located on opposite sides of the second plate portion, the first plate portion The extension direction of the side away from the second plate portion is opposite to the extension direction of the third plate portion away from the second plate portion;
  • the third plate part is connected with the battery connector.
  • the solder layer may be a silver-based solder paste layer or a copper-based solder paste layer.
  • the material of the solder layer is silver-based solder paste or copper-based solder paste.
  • the melting point temperature of the solder paste is 600°C-700°C.
  • the present disclosure provides a battery module, including a circuit board, a battery, and the above-mentioned copper bar assembly.
  • the copper bar in the copper bar assembly is connected to the circuit board, and the battery connector in the copper bar assembly is fixedly connected and electrically connected to the battery.
  • the present disclosure provides a method for connecting copper-bar components, including:
  • the solder is melted to cover the entire connection, thereby connecting the copper bar to the battery connector.
  • the battery connector includes a sleeve, and the joint between the copper bar and the sleeve is filled with solder.
  • the battery connector further includes a connecting sleeve, and the joint between the copper bar and the connecting sleeve is filled with solder paste.
  • an intermediate frequency welding machine is used to weld the copper-bar component with a set current, and the set current is 15kA-30kA.
  • the beneficial effects of the embodiments of the present disclosure include, for example:
  • the copper bar assembly provided by the present disclosure includes a copper bar and a battery connector, the copper bar is provided with a first connection part, the battery connector is provided with a second connection part, and the first connection part and the second connection part are provided between The solder layer covers the surface of the first connection part and the surface of the second connection part.
  • connection between the copper bar and the battery connector is realized by connecting the first connection portion on the copper bar with the second connection portion on the battery connector, and the battery connector is configured to be fixedly connected to the battery and capable of being electrically connected to the battery.
  • a solder layer is provided between the first connection part and the second connection part, the first connection part and the second connection part are welded by the solder layer, and the solder layer covers the entire surface of the first connection part and the second connection During the soldering process, the melting of the solder can fill the gap between the first connection part and the second connection part, thereby reducing the impedance value of the battery connector and the copper-bar connection, thereby reducing the impedance of the copper-bar assembly value.
  • Fig. 1 is a schematic structural diagram of a copper bar assembly according to an embodiment of the present disclosure
  • FIG. 2 is another schematic diagram of the structure of the copper bar assembly shown in FIG. 1;
  • Fig. 3 is a schematic structural diagram of a copper bar assembly according to another embodiment of the present disclosure.
  • Fig. 4 is another schematic diagram of the structure of the copper bar assembly shown in Fig. 3.
  • the terms “the bottom surface of the copper bar 10" and “the top surface of the copper bar 10" are just to distinguish the two opposite sides of the copper bar 10, and do not limit the two sides of the copper bar 10 Which of the faces is the top face and which is the bottom face.
  • the copper bar 10 is usually a part made of copper sheets to realize the electrical connection between the battery and the circuit board. It can be a straight plate or a flat plate, and can also be an L-shaped plate or a Z-shaped plate, etc., which can be set according to specific needs.
  • the copper bar 10 is a Z-shaped plate as an example for description.
  • the copper bar 10 includes a first plate portion 13, a second plate portion 14 and a third plate portion 15 connected in sequence.
  • the first plate portion 13 and the third plate portion 15 are parallel, and the second plate portion 14 is perpendicular to the first plate portion 13
  • the third plate portion 15, the first plate portion 13 and the third plate portion 15 are located on opposite sides of the second plate portion 14, and the extension direction of the side of the first plate portion 13 away from the second plate portion 14 is the same as that of the third plate portion.
  • the extending direction of the side of the plate portion 15 away from the second plate portion 14 is opposite.
  • the present disclosure provides a copper bar assembly, including: a copper bar 10 and a battery connector 50.
  • the copper bar 10 is provided with a first connection portion
  • the battery connector 50 is provided with a second connection.
  • a solder layer 20 is provided between the first connection portion and the second connection portion.
  • the solder layer 20 covers the surface of the first connection portion and the surface of the second connection portion.
  • the first connection portion and the second connection portion are both connected to the solder layer 20Fixed connection.
  • the first connection part on the copper bar 10 is connected to the second connection part on the battery connector 50 to realize the connection between the copper bar 10 and the battery connector 50, and the battery connector 50 is configured to be fixedly connected to the battery And can be electrically connected with the battery.
  • a solder layer 20 is provided between the first connection portion and the second connection portion, and the soldering of the first connection portion and the second connection portion is realized by the solder layer 20, and the solder layer 20 covers the entire first connection portion and the second connection portion.
  • the connection part during the soldering process, a solder is placed between the first connection part and the second connection part, and the solder is heated to melt it. The molten solder can fill the gap between the first connection part and the second connection part.
  • the welding method is adopted, and the connection strength between the copper bar 10 and the battery connector 50 is high, so that the strength of the battery module is high.
  • the plane where the solder layer 20 is located can be intersected with the board surface of the copper bar 10 (such as the top or bottom surface of the copper bar), that is to say, the first connection part can be provided on the side of the copper bar. Coated with solder on the sides.
  • the first connecting portion is arranged on the board surface of the copper bar, that is to say, the plane where the solder layer 20 is located is substantially parallel to the board surface of the copper bar 10.
  • the solder can be directly coated on the board surface of the copper bar 10, and the board surface of the copper bar 10 has a large working space and a large space for solder coating, which facilitates the installation of the solder layer 20.
  • the battery connector 50 can have a variety of structural forms, for example: the battery connector 50 includes a connecting plate, one end of the connecting plate is welded to the copper bar 10, and the other end is connected to the battery; or the battery connector 50 includes a connecting frame, One end is welded to the copper bar 10, and the other end is connected to the battery.
  • the battery connector 50 is connected to the third connection part of the copper bar 10.
  • the battery connector 50 includes a sleeve 30, and the first connecting portion includes a first connecting portion disposed on the copper bar 10 and configured to abut one end of the sleeve 30.
  • the second connecting portion includes a second welding surface 31 formed by one end surface of the sleeve 30.
  • the battery connector 50 includes a sleeve 30, one end of the sleeve 30 abuts against the plate surface of the copper bar 10, and the portion of the copper bar 10 that is arranged to abut one end of the sleeve 30 forms the first welding surface 11.
  • One end of the sleeve 30 (the end of the sleeve 30 configured to abut the copper bar 10) forms a second welding surface 31, and a solder layer 20 is provided between the first welding surface 11 and the second welding surface 31 to realize the first welding The welding between the surface 11 and the second welding surface 31 realizes the welding of the sleeve 30 and the copper bar 10.
  • the sleeve 30 has a simple structure and is convenient for processing and manufacturing.
  • the positioning portion may be a groove 16, and the sleeve 30 is clamped in the groove 16 so as to limit the position of the sleeve 30.
  • the cross section of the sleeve 30 is annular
  • the groove 16 is an annular groove
  • one end of the sleeve 30 is inserted into the annular groove.
  • the first welding surface 11 on the copper bar 10 may include at least one of the groove bottom wall and the groove peripheral wall of the annular groove.
  • the end surface of the sleeve 30 is welded to the bottom wall of the groove, and the outer peripheral surface of the sleeve is welded to the peripheral wall of the groove.
  • the positioning part may also have other structures.
  • an internal thread 45 is provided in the sleeve 30, and fasteners such as bolts or screws are used to connect the battery to the sleeve 30; and the sleeve 30 It is also electrically connected to the electrode of the battery.
  • a conductive connecting sleeve can be arranged at the electrode of the battery, and the connecting sleeve is sleeved with the sleeve 30, so as to realize the electrical connection between the sleeve 30 and the electrode of the battery.
  • the battery connector 50 further includes a connecting sleeve 40, and the sleeve 30 is sleeved outside the connecting sleeve 40; the first connecting portion further includes a copper bar 10 The third welding surface 12 abuts against one end of the connecting sleeve 40, and the second connecting portion further includes a fourth welding surface 43 formed by one end surface of the connecting sleeve 40.
  • the connecting sleeve 40 fixedly connected to the battery and the sleeve 30 electrically connected to the electrode of the battery are arranged independently of each other.
  • the sleeve 30 and the connecting sleeve 30 can be processed separately without interference with each other, which is convenient for processing and manufacturing.
  • a solder layer 20 is provided between the third welding surface 12 and the fourth welding surface 43, and the third welding surface 12 and the fourth welding surface 43 are welded through the solder layer 20, so that the connecting sleeve 40 and the copper bar 10 are welded together.
  • the solder can fill the gap between the connecting sleeve 40 and the copper bar 10 after melting, avoiding the gap between the connecting sleeve 40 and the copper bar 10, thereby avoiding the impedance between the connecting sleeve 40 and the copper bar 10 Great value.
  • the sleeve 30 and the connecting sleeve 40 are respectively connected to the copper bar 10, and at the same time, the sleeve 30 is sleeved outside the connecting sleeve 40, the sleeve 30 and the connecting sleeve 40 are tightly combined, the sleeve 30, the connecting sleeve 40 and
  • the structure of the three components of the copper bar 10 is more firm and reliable.
  • the connecting sleeve 40 may have a variety of structural forms.
  • the connecting sleeve 40 may be a straight structure.
  • one end of the connecting sleeve 40 abuts against one side of the copper bar 10, and the side of the copper bar 10 can also abut the sleeve 30.
  • the sleeve 30 and the connecting sleeve 40 can be held against and welded to one plate surface of the copper bar 10 at the same time.
  • the sleeve 30 and the connecting sleeve 40 can be respectively opposite to the two plate surfaces of the copper bar 10 ( The top and bottom surfaces of the copper bar 10) resist and weld.
  • the connecting sleeve 40 includes a base 41, a rod 42 and a guide 46.
  • the rod 42 is fixed on the base 41, and the guide 46 is fixed on the rod 42 away from the base.
  • One end of 41, the base 41, the rod 42 and the guide 43 may be integrally formed.
  • the rod portion 42 may be located at the center of a board surface of the base 41, and the rod portion 42 extends in a direction perpendicular to the board surface of the base 41.
  • the projection of the rod 42 on the plate surface of the base 41 along its extending direction is located in the base 41. In other words, the outer peripheral surface of the rod 42 is spaced from the outer edge of the base 41.
  • the base 41 can resist the copper bar 10 so as to prevent the connecting sleeve 40 from falling out of the through hole 17.
  • the outer diameter of the guide portion 46 gradually increases from the end away from the rod portion 42 to the end closer to the rod portion 42, which facilitates the insertion of the rod portion 46 on the copper bar 10, and also facilitates the sleeve 30 to be sleeved on the rod portion from the guide portion 43 42 outside.
  • the connecting sleeve 40 is provided with a central hole 44, which penetrates the rod 42 and the base 41 at the same time in a direction perpendicular to the plate surface of the base 41, and the through hole 17 may be arranged coaxially with the rod.
  • an internal thread 45 can be provided in the central hole 44, and the connection between the rod 42 and the battery is realized through the internal thread 45.
  • the copper bar 10 is provided with a through hole 17 configured to allow the rod 42 to pass through.
  • the shape of the through hole 17 matches the shape of the rod 42.
  • the base 41 is in contact with the bottom surface of the copper bar 10, the rod 42 extends out of the top surface of the copper bar 10, the third welding surface 12 is located on the bottom surface of the copper bar 10, and the fourth welding surface 43 is located near the copper bar of the base 41
  • the sleeve 30 is sleeved outside the rod 42, and the copper bar 10 is clamped between the sleeve 30 and the base 41.
  • Center hole 44
  • the base 41 and the rod 42 of the connecting sleeve 40 are respectively located on both sides of the copper bar 10, and the base 41 is arranged such that the side opposite to the copper bar 10 forms a fourth welding surface 43, and the copper bar 10
  • the position corresponding to the base 41 is the third welding surface 12.
  • the fourth welding surface 43 and the second welding surface 31 are respectively located on both sides of the copper bar 10, which can ensure that the solder layer 20 is coated in sufficient quantity to avoid occurrence of Interruption and leakage phenomenon.
  • the solder can be copper-based solder paste, preferably silver-based solder paste.
  • silver-based solder paste has good electrical conductivity and can be used with a silver content of more than 50%.
  • Silver-based solder paste has good electrical conductivity and can be used with a silver content of more than 50%.
  • the melting point temperature of the solder paste between 600°C-700°C, for example: 600°C, 615°C, 630°C, 648°C, 665°C, 680°C or 700°C, etc.
  • the soldering node formed by the solder paste within this temperature range The strength is high, and it can prevent the copper bar 10, the sleeve 30 or the connecting sleeve 40 from changing when the melting point is too high and the welding temperature is too high.
  • the present disclosure also provides a battery module, including a circuit board, a battery, and the above-mentioned copper-bar assembly.
  • the copper-bar 10 of the copper-bar assembly is connected to the circuit board.
  • the battery connector 50 is fixedly and electrically connected to the battery.
  • the battery connector 50 is configured to be fixedly connected to the battery and capable of being electrically connected to the battery.
  • a solder layer 20 is provided between the first connection part and the second connection part, and the soldering of the first connection part and the second connection part is realized by the solder layer 20, and the solder layer 20 covers the entire first connection part and the second connection part, During the soldering process, the solder can fill up the gap between the first connection part and the second connection part after melting, thereby reducing the resistance value of the connection between the battery connector 50 and the copper bar 10, thereby reducing the resistance value of the copper bar assembly , Thereby reducing the heat of the battery, and the battery module works stably.
  • the present disclosure also provides a copper-bar assembly connection method, including:
  • the solder is melted to cover the entire connection, thereby connecting the copper bar 10 and the battery connector 50.
  • solder is applied between the battery connector 50 and the copper bar 10, and then the copper bar 10 and the battery connector 50 are placed in the soldering equipment. During the soldering process, when the temperature reaches the solder melting temperature, the solder melts , The solder fills the entire contact portion to avoid a gap between the battery connector 50 and the copper bar 10, thereby reducing the impedance value between the battery connector 50 and the copper bar 10, thereby reducing the impedance value of the copper bar assembly, thereby reducing The calorific value of the small battery makes the performance of the battery module more stable.
  • solder with relatively good ductility can be used, and an appropriate amount of solder can be applied to the contact part by calculating the amount, which can satisfy the requirement that the solder melts to cover the entire contact part.
  • the contact part may be a part of the copper bar 10 configured to be connected to the battery connector 50, the contact part may also be a part of the battery connector 50 configured to be connected to the copper bar 10, and the contact part may also be a part of the copper bar 10 The part configured to be connected to the battery connector 50 and the part of the battery connector 50 configured to be connected to the copper bar 10.
  • the battery connector 50 includes a sleeve 30, and the joint between the copper bar 10 and the sleeve 30 is filled with solder.
  • the position on the copper bar 10 that is configured to correspond to the sleeve 30 can be coated with solder, and the end surface of the sleeve 30 that is configured to be connected to the copper bar 10 can also be coated with solder.
  • the position on the sleeve 10 is filled with solder at a position corresponding to the sleeve 30, and the end surface of the sleeve 30 where it is arranged to be connected to the copper bar 10 is filled with solder.
  • the battery connector 50 further includes a connecting sleeve 40, and the contact part of the copper bar 10 and the connecting sleeve 40 is coated with solder paste.
  • the position on the copper bar 10 that is configured to correspond to the connection sleeve 40 can be coated with solder, and the end surface of the connection sleeve 40 that is configured to be connected to the copper bar 10 can also be coated with solder.
  • the position on the 10 is configured to be filled with solder at the position corresponding to the connecting sleeve 40, and the end surface of the connecting sleeve 40 which is configured to be connected to the copper bar 10 is covered with solder.
  • an intermediate frequency welding machine is used to weld the copper-bar component with a set current, and the set current is 15-30kA.
  • the current is 15-30kA, for example, the current is 15kA, 18kA, 22kA, 25kA, 27kA, or 30kA.
  • the present disclosure provides a copper-bar component, a battery module, and a copper-bar component connection method, which has low resistance value, low heat generation of the battery, and stable performance.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

一种铜巴（10）组件、电池模组以及铜巴（10）组件连接方法，涉及新能源电池技术领域。所述铜巴（10）组件，包括铜巴（10）和电池连接件（50），所述铜巴（10）上设有第一连接部，所述电池连接件（50）上设有第二连接部，所述第一连接部和所述第二连接部之间设有焊料层（20），所述焊料层（20）覆盖所述第一连接部的表面和所述第二连接部的表面。在第一连接部和第二连接部之间设置焊料层（20），通过焊料层（20）实现第一连接部和第二连接部的焊接，且焊料层（20）覆盖整个第一连接部和第二连接部，在焊接过程中，焊料熔化可以填满第一连接部和第二连接部之间的间隙，从而能够降低电池连接件（50）和铜巴（10）连接处的阻抗值，进而降低铜巴（10）组件的阻抗值。

Description

铜巴组件、电池模组以及铜巴组件连接方法
相关申请的交叉引用
本公开要求于2020年04月10日提交中国专利局的申请号为2020102769201、名称为“铜巴组件、电池模组以及铜巴组件连接方法”的中国专利申请的优先权。
技术领域
本公开涉及新能源电池技术领域，具体而言，涉及一种铜巴组件、电池模组以及铜巴组件连接方法。
背景技术
新能源汽车的电池模组包括电路板和多个电池，每个电池需要与电路板电连接以实现充电或者送电，铜巴组件连接在电池和电路板之间以实现电池与电路板的电连接。
目前，铜巴组件包括铜巴、螺母和套筒，螺母包括螺母本体和基座，铜巴上设有通孔，螺母本体穿过铜巴上的通孔，以使基座与螺母本体分别位于铜巴的两侧，螺母本体外设有外螺纹，套筒内设有内螺纹，套筒拧紧在螺母本体上，从而铜巴、螺母和套筒实现连接固定。铜巴与电路板连接，套筒与电池的电极电连接，螺母通过螺栓与电池连接固定。
存在的问题是，上述连接方式由于存在装配误差，导致铜巴组件的阻抗值 大。
发明内容
本公开的目的在于，例如，提供一种铜巴组件、电池模组以及铜巴组件连接方法，以解决现有技术中的铜巴组件阻抗值大的技术问题。
本公开的实施例是这样实现的：
本公开提供一种铜巴组件，包括：铜巴和电池连接件，铜巴上设有第一连接部，电池连接件上设有第二连接部，第一连接部和第二连接部之间设有焊料层，焊料层覆盖第一连接部的表面和第二连接部的表面。
可选地，第一连接部设置在铜巴的板面上。
可选地，电池连接件包括套筒，第一连接部包括设置在铜巴上的与套筒的一端相抵的第一焊接面，第二连接部包括由套筒的一端面形成的第二焊接面。
可选地，套筒内设有内螺纹，以配置成与电池螺纹连接；套筒与电池的电极电连接。
可选地，铜巴上设置有配置成定位套筒的定位部，套筒和定位部插接配合。
可选的，定位部设置为凹槽，套筒插接于凹槽内。
可选地，电池连接件还包括连接套，套筒套设在连接套外；
第一连接部还包括设置在铜巴上的与连接套的一端相抵的第三焊接面，第 二连接部还包括由连接套的一端面形成的第四焊接面，第三焊接面与第四焊接面焊接固定。
可选地，第三焊接面与第四焊接面之间设有焊料层，焊料层同时覆盖第三焊接面以及第四焊接面。
可选地，连接套包括基座和杆部，铜巴上设有配置成供杆部穿过的通孔，基座与铜巴的底面抵接，杆部伸出铜巴的顶面，第三焊接面位于铜巴的底面上，第四焊接面位于基座的靠近铜巴的一面上，套筒套设在杆部外。
可选的，连接套设置有中心孔，中心孔同时贯穿基座以及杆部，且中心孔沿杆部的延伸方向延伸；中心孔配置成与电池连接。
可选地，中心孔的孔壁上设有配置成与电池连接的内螺纹。
可选地，杆部远离基座的一端设有引导部，引导部的外径由其远离杆部的一端向靠近杆部的一端逐渐增大。
可选地，铜巴为平板、L型板或者Z型板。
可选地，铜巴包括依次连接的第一板部、第二板部和第三板部，第一板部与第三板部平行且位于第二板部的相对两侧，第一板部远离第二板部的一侧的延伸方向与第三板部远离第二板部的一侧的延伸方向相反；
第三板部与电池连接件连接。
可选地，焊料层可以是银基焊膏层或者铜基焊膏层。
可选地，焊料层的材质为银基焊膏或者铜基焊膏。
可选地，焊膏的熔点温度为600℃-700℃。
本公开提供一种电池模组，包括电路板、电池和上述铜巴组件，铜巴组件中的铜巴与电路板连接，铜巴组件中的电池连接件与电池固定连接且电连接。
本公开提供一种铜巴组件连接方法，包括：
在铜巴与电池连接件的连接处涂覆焊料；
使焊料熔化覆盖整个连接处，从而将铜巴和电池连接件连接。
可选地，电池连接件包括套筒，在铜巴与套筒的连接处涂满焊料。
可选地，电池连接件还包括连接套，在铜巴与连接套的连接处涂满焊膏。
可选地，采用中频焊机以设定电流对铜巴组件进行焊接，设定电流为15kA-30kA。
与现有技术相比，本公开实施例的有益效果包括，例如：
本公开提供的铜巴组件，包括铜巴和电池连接件，铜巴上设有第一连接部，电池连接件上设有第二连接部，第一连接部和第二连接部之间设有焊料层，焊料层覆盖第一连接部的表面和第二连接部的表面。
通过铜巴上的第一连接部与电池连接件上的第二连接部连接从而实现铜巴和电池连接件的连接，电池连接件配置成与电池固定连接且能够与电池电连 接。具体地，在第一连接部和第二连接部之间设置焊料层，通过焊料层实现第一连接部和第二连接部的焊接，且焊料层覆盖整个第一连接部的表面和第二连接部的表面，在焊接过程中，焊料熔化可以填满第一连接部和第二连接部之间的间隙，从而能够降低电池连接件和铜巴连接处的阻抗值，进而降低铜巴组件的阻抗值。
附图说明
构成本公开的一部分的附图用来提供对本公开的进一步理解，本公开的示意性实施例及其说明用于解释本公开，并不构成对本公开的不当限定。在附图中：
图1是根据本公开一实施例的铜巴组件的一结构示意图；
图2是图1所示的铜巴组件的另一结构示意图；
图3是根据本公开另一实施例的铜巴组件的结构示意图；
图4是图3所示的铜巴组件的另一结构示意图。
图中：10-铜巴；20-焊料层；30-套筒；40-连接套；41-基座；42-杆部；11-第一焊接面；12-第三焊接面；13-第一板部；14-第二板部；15-第三板部；16-凹槽；17-通孔；31-第二焊接面；43-第四焊接面；44-中心孔；45-内螺纹；46-引导部；50-电池连接件。
具体实施方式
需要说明的是，在不冲突的情况下，本公开中的实施例及实施例中的特征可以相互组合。下面将参考附图并结合实施例来详细说明本公开。
在本公开的描述中，需要说明的是，术语“铜巴10的底面”和“铜巴10的顶面”，只是为了区分铜巴10相对的两个面，不限定铜巴10的两个面中哪一个面是顶面，哪一个是底面。
铜巴10通常是采用铜片制成的零件，实现电池与电路板之间的电连接，可以为直板或者平板，还可以为L型板或者Z型板等，可根据具体需要设置。
本实施例中，可选的，以铜巴10为Z型板为例进行说明。铜巴10包括依次连接的第一板部13、第二板部14和第三板部15，第一板部13和第三板部15平行，第二板部14垂直于第一板部13和第三板部15，第一板部13和第三板部15位于第二板部14相对的两侧，且第一板部13远离第二板部14的一侧的延伸方向与第三板部15远离第二板部14的一侧的延伸方向相反。
如图1至图4所示，本公开提供一种铜巴组件，包括：铜巴10和电池连接件50，铜巴10上设有第一连接部，电池连接件50上设有第二连接部，第一连接部和第二连接部之间设有焊料层20，焊料层20覆盖第一连接部的表面和第二连接部的表面，第一连接部和第二连接部均与焊料层20固定连接。
本实施例中，通过铜巴10上的第一连接部与电池连接件50上的第二连接部连接从而实现铜巴10和电池连接件50的连接，电池连接件50配置成与电池固定连接且能够与电池电连接。具体地，在第一连接部和第二连接部之间设置焊料层20，通过焊料层20实现第一连接部和第二连接部的焊接，且焊料层 20覆盖整个第一连接部和第二连接部，在焊接过程中，在第一连接部和第二连接部之间设置焊料，加热焊料使其熔化，熔化后的焊料可以填满第一连接部和第二连接部之间的间隙，从而能够降低电池连接件50和铜巴10连接处的阻抗值(相对相同外形结构的铜巴组件)，进而降低铜巴组件的阻抗值，从而能够使电池的发热量小，使电池模组稳定。而且采用焊接方式，铜巴10和电池连接件50之间的连接强度高，从而使电池模组的强度高。
其中，焊料层20所在平面可以与铜巴10的板面(如铜巴的顶面或者底面)相交设置，也就是说第一连接部可设置在铜巴的侧面，焊接时，在铜巴10的侧面涂覆焊料。
作为一种可选方案，如图2和图4所示，第一连接部设置在铜巴的板面上，也就是说焊料层20所在平面与铜巴10的板面大体平行。可直接在铜巴10的板面上涂覆焊料，铜巴10的板面工作空间大，可涂覆焊料的空间大，方便设置焊料层20。
电池连接件50的结构形式可以为多种，例如:电池连接件50包括连接板，连接板的一端与铜巴10焊接，另一端与电池连接；或者电池连接件50包括连接框架，连接框架的一端与铜巴10焊接，另一端与电池连接等。
可选的，电池连接件50与铜巴10的第三连接部连接。
作为一种可选方案，如图1和图2所示，电池连接件50包括套筒30，第一连接部包括设置在铜巴10上的且配置成与套筒30的一端相抵的第一焊接面11，第二连接部包括由套筒30的一端面形成的第二焊接面31。
本实施例中，电池连接件50包括套筒30，套筒30的一端与铜巴10的板面相抵，铜巴10的配置成与套筒30的一端相抵的部位形成第一焊接面11，套筒30的一端(套筒30配置成与铜巴10相抵的一端)形成第二焊接面31，在第一焊接面11和第二焊接面31之间设置焊料层20，以实现第一焊接面11和第二焊接面31之间的焊接，从而实现套筒30和铜巴10的焊接。套筒30的结构简单，方便加工制造。还可以在铜巴10上设置配置成定位套筒30的定位部，定位部可以是凹槽16，将套筒30卡在凹槽16内，从而能够对套筒30进行限位。
应当理解，套筒30的横截面为环形，凹槽16为环形槽，套筒30的一端插接在环形槽中。当铜巴10上设置环形槽以定位套筒30时，铜巴10上的第一焊接面11可以包括环形槽的槽底壁和槽周壁二者中的至少一个。为了提高稳定性，当套筒30插接在环形槽后，套筒30的端面和槽底壁焊接，且套筒的外周面与槽周壁焊接。
显然，定位部还可以是其他结构。
其中，实现铜巴组件与电池的固定连接的方式可以为多种，例如：在套筒30内设置内螺纹45，采用螺栓或者螺杆等紧固件将电池与套筒30连接；而且套筒30还与电池的电极电连接，具体可在电池的电极处设置可导电的连接套，连接套与套筒30套接，从而实现套筒30与电池的电极的电连接。
作为一种可选方案，如图3和图4所示，电池连接件50还包括连接套40，套筒30套设在连接套40外；第一连接部还包括设置在铜巴10上的与连接套40的一端相抵的第三焊接面12，第二连接部还包括由连接套40的一端面形成 的第四焊接面43。
本实施例中，将与电池固定连接的连接套40和与电池的电极电连接的套筒30相互独立设置，套筒30和连接套30可以分别加工，互不干扰，方便加工制造。在第三焊接面12和第四焊接面43之间设置焊料层20，通过焊料层20实现第三焊接面12和第四焊接面43的焊接，从而将连接套40与铜巴10焊接，同理，通过焊接，焊料熔化后可以填满连接套40与铜巴10之间的间隙，可避免连接套40与铜巴10之间存在间隙，从而避免连接套40与铜巴10之间的阻抗值大。通过焊接，套筒30和连接套40均分别与铜巴10连接，同时，套筒30套设在连接套40外，套筒30和连接套40的结合紧密，套筒30、连接套40和铜巴10三者构成的结构更加牢固可靠。
其中，连接套40的结构形式可以为多种，例如，连接套40可以为直筒结构。另外，连接套40的一端与铜巴10的一面相抵，铜巴10的该面也可以与套筒30相抵。
换句话说，套筒30与连接套40可以同时与铜巴10的一板面抵持并焊接，可选的，套筒30与连接套40可以分别与铜巴10相对的两个板面(铜巴10的顶面和底面)抵持并焊接。
作为一种可选方案，如图4所示，连接套40包括基座41、杆部42和引导部46，杆部42固定在基座41上，引导部46固定在杆部42远离基座41的一端，基座41、杆部42和引导部43可以一体成型。杆部42可以位于基座41的一板面上的中心位置处，杆部42沿垂直于基座41的板面方向延伸。杆部42沿其延伸方向在基座41的板面上的投影位于基座41内，换句话说，杆部 42的外周面与基座41的外边缘具有间距，当杆部42插接于通孔17后，基座41能够与铜巴10抵持，从而避免连接套40从通孔17中脱出。引导部46的外径由其远离杆部42的一端向靠近杆部42的一端逐渐增大，既便于杆部46插入铜巴10上，也便于套筒30从引导部43套接在杆部42外。
可选的，连接套40设置有中心孔44，中心孔44沿垂直于基座41的板面方向同时贯穿杆部42和基座41，通孔17可以与杆部同轴设置。同时，中心孔44内可设置内螺纹45，通过内螺纹45实现杆部42与电池的连接。
可选的，铜巴10上设有配置成供杆部42穿过的通孔17，可选的，通孔17位于第三板部15上，通孔17沿垂直于第三板部15的板面方向延伸；同时，通孔17的形状与杆部42的形状相匹配，杆部42插接在通孔17后，杆部42的外周面与通孔17的孔壁贴合，杆部42与通孔17的配合紧密，结构稳固。基座41与铜巴10的底面抵接，杆部42伸出铜巴10的顶面，第三焊接面12位于铜巴10的底面上，第四焊接面43位于基座41的靠近铜巴10的一面上，套筒30套设在杆部42外，铜巴10被夹持于套筒30和基座41之间。中心孔44
本实施例中，连接套40的基座41和杆部42的部分分别位于铜巴10的两侧，基座41的配置成与铜巴10相对的一面形成第四焊接面43，铜巴10的配置成与基座41相对应的位置为第三焊接面12，第四焊接面43和第二焊接面31分别位于铜巴10的两侧，能够保障焊料层20涂覆足量，避免出现断和漏现象。
在上述实施例基础之上，可选的，焊料可以采用铜基焊膏，较佳地采用银 基焊膏，相对而言，银基焊膏的导电性能好，可采用银含量50％以上的银基焊膏。
选择焊膏的熔点温度在600℃-700℃之间，例如：600℃、615℃、630℃、648℃、665℃、680℃或者700℃等，这个温度范围内的焊膏形成的焊接节点强度高，又能够避免熔点过高时导致焊接温度过高使铜巴10、套筒30或者连接套40发生变化。
在上述实施例基础之上，可选的，本公开还提供一种电池模组，包括电路板、电池和上述铜巴组件，铜巴组件中的铜巴10与电路板连接，铜巴组件中的电池连接件50与电池固定连接且电连接。
本实施例中，电池连接件50配置成与电池固定连接且能够与电池电连接。在第一连接部和第二连接部之间设置焊料层20，通过焊料层20实现第一连接部和第二连接部的焊接，且焊料层20覆盖整个第一连接部和第二连接部，在焊接过程中，焊料熔化后可以填满第一连接部和第二连接部之间的间隙，从而能够降低电池连接件50和铜巴10连接处的阻抗值，进而降低铜巴组件的阻抗值，从而减小电池的发热量，电池模组的工作稳定。
本公开还提供一种铜巴组件连接方法，包括：
在铜巴10与电池连接件50的连接处涂覆焊料；
使焊料熔化覆盖整个连接处，从而将铜巴10和电池连接件50连接。
本实施例中，在电池连接件50和铜巴10之间涂覆焊料，然后将铜巴10 和电池连接件50放入焊接设备中，焊接过程中，当温度达到焊料熔化温度时，焊料熔化，焊料填满整个接触部，避免电池连接件50与铜巴10之间产生间隙，从而降低电池连接件50与铜巴10之间的阻抗值，从而降低铜巴组件的阻抗值，进而能够减小电池的发热量，使电池模组性能更加稳定。
其中，可以采用延展性比较好的焊料，通过计算用量，在接触部涂覆适量的焊料，能够满足焊料熔化后覆盖整个接触部。
可选的，焊料采用焊膏，在组装前，将焊膏涂满整个接触部，从而保障焊膏熔化后能够覆盖整个接触部。其中，接触部可以是铜巴10上配置成与电池连接件50连接的部分，接触部还可以是电池连接件50上配置成与铜巴10连接的部分，接触部还可以是铜巴10上配置成与电池连接件50连接的部分以及电池连接件50上配置成与铜巴10连接的部分。
具体地，电池连接件50包括套筒30，在铜巴10与套筒30的连接处涂满焊料。
其中，可以在铜巴10上的配置成与套筒30相对应的位置涂满焊料，还可以在套筒30的配置成与铜巴10连接的端面上涂满焊料，还可以既在铜巴10上的配置成与套筒30相对应的位置涂满焊料，又在套筒30的配置成与铜巴10连接的端面上涂满焊料。
电池连接件50还包括连接套40，在铜巴10与连接套40接触的接触部涂满焊膏。
其中，可以在铜巴10上的配置成与连接套40相对应的位置涂满焊料，还 可以在连接套40的配置成与铜巴10连接的端面上涂满焊料，还可以既在铜巴10上的配置成与连接套40相对应的位置涂满焊料，又在连接套40的配置成与铜巴10连接的端面上涂满焊料。
在上述实施例基础之上，可选的，采用中频焊机以设定电流对铜巴组件进行焊接，设定电流为15-30kA。
本实施例中，电流为15-30kA，如电流为15kA、18kA、22kA、25kA、27kA或者30kA等。
以上仅为本公开的较佳实施例而已，并不用以限制本公开，凡在本公开的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本公开的保护范围之内。
此外，本领域的技术人员能够理解，尽管上述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，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。另外，公开于该背景技术部分的信息仅仅旨在加深对本申请的总体背景技术的理解，而不应当被视为承认或以任何形式暗示该信息构成已为本领域技术人员所公知的现有技术。
工业实用性：
综上所述，本公开提供了一种铜巴组件、电池模组以及铜巴组件连接方法，抗阻值小，电池发热量小，性能稳定。

Claims (19)

  1. 一种铜巴组件，其特征在于，包括：铜巴和电池连接件，所述铜巴上设有第一连接部，所述电池连接件上设有第二连接部，所述第一连接部和所述第二连接部之间设有焊料层，所述焊料层覆盖所述第一连接部的表面和所述第二连接部的表面。
  2. 根据权利要求1所述的铜巴组件，其特征在于，所述第一连接部设置在所述铜巴的板面上。
  3. 根据权利要求1所述的铜巴组件，其特征在于，所述电池连接件包括套筒，所述第一连接部包括设置在所述铜巴上的与所述套筒的一端相抵的第一焊接面，所述第二连接部包括所述由套筒的一端面形成的第二焊接面。
  4. 根据权利要求3所述的铜巴组件，其特征在于，所述铜巴上设置有配置成定位所述套筒的定位部，所述套筒和所述定位部插接配合。
  5. 根据权利要求4所述的铜巴组件，其特征在于，所述定位部设置为凹槽，所述套筒插接于所述凹槽内。
  6. 根据权利要求3-5中任一项所述的铜巴组件，其特征在于，所述电池连接件还包括连接套，所述套筒套设在所述连接套外；
    所述第一连接部还包括设置在所述铜巴上的与所述连接套的一端相抵的第三焊接面，所述第二连接部还包括由所述连接套的一端面形成的第四焊接面，所述第三焊接面与所述第四焊接面焊接固定。
  7. 根据权利要求6所述的铜巴组件，其特征在于，所述第三焊接面与所述第四焊接面之间设有焊料层，所述焊料层同时覆盖所述第三焊接面以及所述第四焊接面。
  8. 根据权利要求6或者7所述的铜巴组件，其特征在于，所述连接套包括相连的基座和杆部，所述铜巴上设有配置成供所述杆部穿过的通孔，所述基座与所述铜巴的底面抵接，所述杆部伸出所述铜巴的顶面，所述第三焊接面位于所述铜巴的底面上，所述第四焊接面位于所述基座的靠近所述铜巴的一面上，所述套筒套设在所述杆部外。
  9. 根据权利要求8所述的铜巴组件，其特征在于，所述连接套设置有中心孔，所述中心孔同时贯穿所述基座以及所述杆部，且所述中心孔沿所述杆部的延伸方向延伸；所述中心孔配置成与电池连接。
  10. 根据权利要求9所述的铜巴组件，其特征在于，所述中心孔的孔壁上设有配置成与电池连接的内螺纹。
  11. 根据权利要求8-10中任一项所述的铜巴组件，其特征在于，所述杆部远离所述基座的一端设有引导部，所述引导部的外径由其远离所述杆部的一端向靠近所述杆部的一端逐渐增大。
  12. 根据权利要求1-11中任一项所述的铜巴组件，其特征在于，所述铜巴为平板、L型板或者Z型板。
  13. 根据权利要求1-11中任一项所述的铜巴组件，其特征在于，所述铜巴包括依次连接的第一板部、第二板部和第三板部，所述第一板部与所述第三板 部平行且位于所述第二板部的相对两侧，所述第一板部远离所述第二板部的一侧的延伸方向与所述第三板部远离所述第二板部的一侧的延伸方向相反；
    所述第三板部与所述电池连接件连接。
  14. 根据权利要求1-13中任一项所述的铜巴组件，其特征在于，所述焊料层可以是银基焊膏层或者铜基焊膏层。
  15. 一种电池模组，其特征在于，包括电路板、电池和如权利要求1-14中任一项所述的铜巴组件，所述铜巴组件中的铜巴与所述电路板连接，所述铜巴组件中的电池连接件与所述电池固定连接且电连接。
  16. 一种铜巴组件连接方法，其特征在于，包括：
    在铜巴与电池连接件的连接处涂覆焊料；
    使焊料熔化覆盖整个连接处，从而将铜巴和电池连接件连接。
  17. 根据权利要求16所述的铜巴组件连接方法，其特征在于，所述电池连接件包括套筒，在所述铜巴与所述套筒之间的连接处涂满所述焊料。
  18. 根据权利要求17所述的铜巴组件连接方法，其特征在于，所述电池连接件还包括连接套，在所述铜巴与所述连接套之间的连接处涂满所述焊料。
  19. 根据权利要求16-18中任一项所述的铜巴组件连接方法，其特征在于，采用中频焊机以设定电流对所述铜巴组件进行焊接，所述设定电流为15kA-30kA。
PCT/CN2020/126214 2020-04-10 2020-11-03 铜巴组件、电池模组以及铜巴组件连接方法 WO2021203691A1 (zh)

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