WO2020088358A1 - 一种电池模组及制造方法 - Google Patents

一种电池模组及制造方法 Download PDF

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Publication number
WO2020088358A1
WO2020088358A1 PCT/CN2019/113221 CN2019113221W WO2020088358A1 WO 2020088358 A1 WO2020088358 A1 WO 2020088358A1 CN 2019113221 W CN2019113221 W CN 2019113221W WO 2020088358 A1 WO2020088358 A1 WO 2020088358A1
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WO
WIPO (PCT)
Prior art keywords
battery
management unit
battery management
middle plate
accommodating groove
Prior art date
Application number
PCT/CN2019/113221
Other languages
English (en)
French (fr)
Inventor
黄爱芳
Original Assignee
宁德时代新能源科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 宁德时代新能源科技股份有限公司 filed Critical 宁德时代新能源科技股份有限公司
Priority to EP19880246.4A priority Critical patent/EP3796459A4/en
Publication of WO2020088358A1 publication Critical patent/WO2020088358A1/zh
Priority to US17/125,941 priority patent/US11769920B2/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M10/4257—Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
    • H01M50/24—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries from their environment, e.g. from corrosion
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/262—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks
    • H01M50/264—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks for cells or batteries, e.g. straps, tie rods or peripheral frames
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M6/00—Primary cells; Manufacture thereof
    • H01M6/50—Methods or arrangements for servicing or maintenance, e.g. for maintaining operating temperature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
    • 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 battery module contains a plurality of battery cells.
  • a battery management unit is usually provided in the battery module.
  • the battery management unit is usually installed on one end plate of the battery module, or together with the bus line on the wire harness isolation plate above the unit cell.
  • the single battery will squeeze the end plate when it expands, if the battery management unit is installed on the end plate, there is a risk of the battery management unit being deformed under pressure and failing.
  • the single battery and the bus line generate a lot of heat during operation, if the battery management unit is installed on the wiring harness isolation plate, there is a technical problem that the battery management unit is heated, resulting in a high temperature.
  • this application provides a battery module, including:
  • More than two sets of battery packs each of which includes more than two single cells
  • the module frame includes an end plate and a side plate, and the end plate and the side plate surround a receiving cavity for fixing the battery pack;
  • a middle plate, the middle plate is arranged between the two battery packs, and an accommodating groove is arranged inside;
  • the accommodating groove is recessed from the top to the bottom of the middle plate.
  • the battery management unit includes a battery management circuit board and a casing, and the battery management circuit board is disposed in the casing.
  • the housing is provided with fixing ears, and the fixing ears are fixed to the top of the middle plate by fasteners.
  • an elastic pad is arranged at the bottom of the middle plate.
  • grooves are respectively provided on both sides of the bottom of the middle plate, and the top of the elastic pad is fixed in the groove.
  • sampling line of the single battery is connected to the top of the battery management unit.
  • the bottom of the side plate is provided with an L-shaped flange, and the bottom of the unit cell is located on the L-shaped flange.
  • the output electrode of the battery module is disposed on the upper surface of the middle plate.
  • Another aspect of the present application provides a method for manufacturing a battery module, wherein the manufacturing method includes:
  • the middle plate is arranged between the two battery packs; the middle plate is provided with an accommodating groove;
  • the manufacturing method further includes:
  • the manufacturing method further includes:
  • the battery pack is arranged in the accommodating cavity of the module frame.
  • the disposing the battery management unit in the accommodating groove of the midplane includes:
  • the battery management circuit board and the casing are arranged in the accommodating groove of the middle plate; the battery management circuit board is arranged in the casing.
  • the housing is provided with a fixing ear
  • the manufacturing method further includes:
  • the above technical solution includes more than two sets of battery packs, the middle plate is provided between the two sets of battery packs, and the battery management unit is provided in a receiving slot inside the middle plate to prevent the single battery
  • the battery management unit fails due to the expansion pressure; and the battery management unit is installed in the middle plate can also prevent the excessive temperature caused by the heating of the single battery and the bus line, thereby greatly improving the reliability of the battery management unit Sex.
  • FIG. 1 is a schematic structural diagram of a battery module according to a specific embodiment
  • FIG. 2 is an exploded view of the battery module according to the specific embodiment
  • Figure 3 is a partial enlarged view of part A in Figure 1;
  • FIG. 4 is a schematic diagram of FIG. 3 when no battery management unit is provided
  • FIG. 5 is a top view of the battery management unit and the middle plate after being assembled in a specific embodiment
  • FIG. 6 is a schematic diagram of the assembly of the battery management unit and the elastic pad in the specific embodiment
  • FIG. 9 is a schematic view of the connection between the side plate and the middle plate in a specific embodiment (viewed from the bottom up);
  • this embodiment provides a battery module.
  • the battery pack 4 is composed of more than two unit batteries 41 arranged in front and rear, and the adjacent two unit batteries 41 are arranged with their large surfaces facing each other.
  • the single battery 41 is an energy storage unit of the battery module, and is used to store electrical energy and provide external electrical energy.
  • the unit cells 41 in the battery pack 4 may be connected in series or parallel, and each group of the battery pack 4 may be provided with an input positive output electrode and an output negative output electrode, respectively.
  • the battery pack 4 may form a rectangular parallelepiped structure in which the large surfaces of the unit cells 41 face both ends.
  • the coordinate system Z1 is the X axis, which is the length direction
  • Z2 is the Y axis, which is the width direction
  • Z3 is the Z axis, which is the height direction.
  • the module frame 1 includes two oppositely disposed end plates 11 and two oppositely disposed side plates 12.
  • the end plates 11 and the side plates 12 are connected to each other end to end to surround the battery pack
  • the accommodating cavity of 4 that is, the position where the battery pack 4 is placed.
  • the module frame 1 can play a role of fixing and protecting the battery pack 4 to prevent the battery pack 4 and the unit battery 41 from being displaced or being hit or scratched by external objects.
  • the module frame 1 may be formed by connecting metal sheets such as aluminum alloy or steel sheet.
  • the module frame 1 may further include a cover plate 13, which is disposed above the battery pack 4 and plays a role of top protection.
  • the two sets of the battery packs 4 can be accommodated in the accommodating cavity of the battery pack 4 at the same time, and the two sets of battery packs 4 are arranged back and forth along the length direction.
  • the middle plate 2 is disposed between the two sets of battery packs 4, the two large faces of the middle plate 2 are respectively opposite to one end faces of the two sets of battery packs 4, and the other of the two sets of battery packs 4 One end is opposite to the two end plates 11 respectively.
  • the end plate 11 can limit the positions of the battery pack 4 and the unit battery 41 on the one hand, and can absorb the stress when the unit battery 41 expands on the other hand to prevent the unit battery 41 from expanding and breaking.
  • the end of the module frame refers to an end in the longitudinal direction of the module frame.
  • the middle plate 2 and the end plate 11 are arranged parallel to each other between the two end plates 11, and an accommodation groove 21 is provided inside the middle plate 2.
  • the middle plate 2 may be disposed at the middle position of the two end plates 11 or at a non-intermediate position between the two end plates 11, that is, the distance between the middle plate 2 and the two end plates 11 may be Are not equal.
  • the middle plate 2 may be made of metal material or other hard materials.
  • the battery management unit 3 is disposed in the accommodating groove 21 of the midplane 2, and the battery management unit 3 is connected to the sampling line 5 of the unit battery 41 to collect the unit battery 41 Temperature, voltage and other data.
  • the battery management unit 3 is used to collect data such as the voltage and temperature of the single cell 41, and send the collected data to a battery management system outside the battery module.
  • the battery management unit 3 is disposed in the accommodating groove 21 inside the middle plate 2, and the battery management unit 3 is connected to the sampling line 5 of the single battery 41.
  • the sampling line 5 may be electrically connected to the pole of the single battery 41 to collect voltage data of the battery cell, and the sampling line 5 may also be connected to a temperature sensor, and the temperature sensor may be connected to the single battery
  • the casing or pole of 41 is in contact with each other to collect temperature data of the single battery 41.
  • the accommodating groove 21 inside the middle plate 2 means that the interior of the middle plate 2 is partially hollowed out, so as to form a groove body or a cavity capable of accommodating the battery management unit 3.
  • the accommodating groove 21 only needs to be able to accommodate the battery management unit 3 so that the surface of the battery management unit 3 does not exceed the front and rear large surfaces of the middle plate 2.
  • the accommodating groove 21 is disposed inside the middle plate 2, and the surface of the battery management unit 3 does not exceed the two front and rear surfaces of the middle plate 2, so that the battery management unit 3 does not The end faces of the battery pack 4 are in contact. Therefore, the pressure during the expansion of the unit battery 41 directly acts on the middle plate 2 without acting on the battery management unit 3, thereby preventing the battery management unit 3 caused by the expansion pressure of the unit battery 41 Deformation failure. Since the middle plate 2 is located between the two battery packs 4, its temperature is lower than that of the unit battery 41, so that the temperature of the battery management unit 3 can be prevented from being too high.
  • an isolation plate 6 may be provided on the top of the battery pack 4, the sampling line 5 of the unit cell 41 may be a flexible circuit board, and the isolation plate provided on the top of the battery pack 4 The upper surface of the board 6.
  • the flexible circuit board is also called FPC, which has the advantages of thin thickness and bending, so it basically does not occupy the space on the top of the battery module, which is beneficial to protect the energy density of the battery module. At the same time, the flexible circuit board can be bent It is convenient for wiring of sampling line 5.
  • the accommodating groove 21 inside the middle plate 2 may be formed by being recessed from the top of the middle plate 2 toward the bottom, that is, the opening of the accommodating groove 21 is provided in the On the top of the middle plate 2, the battery management unit 3 is inserted into the accommodating groove 21 from the top of the middle plate 2.
  • the sockets of the battery management unit 3 and the sampling line 5 may also be provided on the upper part of the battery management unit 3.
  • Adopting such a structure of the accommodating groove 21 facilitates the disassembly and assembly of the battery management unit 3, and at the same time facilitates the connection of the sampling line 5 to the battery management unit 3;
  • the expansion pressure and temperature of the group 4 will not directly act on the battery management unit 3 (the opening of the accommodating groove 21 is disposed on the side of the middle plate 2 and has better heat insulation and anti-expansion performance).
  • the output electrode of the battery module may be provided on the upper surface of the middle plate 2.
  • a positive output electrode 43 and a negative output electrode 42 are provided on both sides of the top of the middle plate 2, wherein the positive output electrode 43 and the negative output electrode 42 on both sides of the middle plate 2 are on the corresponding side
  • the output electrode of the battery pack 4, the positive output electrode 43 and the negative output electrode 42 are correspondingly connected to the positive output electrode post and the negative output electrode post of the battery pack 4. Setting the output electrode on the top of the middle plate 2 can make full use of the space in the middle of the battery module, save the positions of both ends of the battery module, and help to improve the energy density of the battery module.
  • positioning structures 211 are provided on both sides of the accommodating groove 21, wherein the positioning structures 211 are in contact with both sides of the battery management unit 3 to fix the The position of the battery management unit 3 in the accommodating groove 21 prevents the battery management unit 3 from shaking in the accommodating groove 21.
  • the battery management unit 3 is restricted from shaking in the thickness direction of the accommodating groove 21 (that is, the Z1 axis direction in the figure), so that the front and rear surfaces of the battery management unit 3 and the inner wall of the accommodating groove 21 There is a gap between them.
  • the positioning structure 211 has different structural forms. As shown in FIG. 4, the positioning structure 211 is a groove-shaped structure, that is, another groove (that is, the position indicated by the 211) is provided on the left and right sides of the accommodating groove 21 respectively, and the width of the groove It is equivalent to the thickness of the battery management unit 3, so that both sides of the battery management unit 3 can be stably stuck in the grooves, so as not to shake. And the width of the groove is smaller than the width of the accommodating groove 21, so that there is a gap between the front and rear surfaces of the battery management unit 3 and the inner wall of the accommodating groove 21, wherein the gap is at least 1mm.
  • the positioning structure 211 is provided in the accommodating groove 21, there is a gap between the front and rear surfaces of the battery management unit 3 and the inner wall of the accommodating groove 21, which is The deformation caused by the expansion of the body battery 41 reserves space so that it does not squeeze the battery management unit 3. Moreover, the positioning structure 211 also has a guiding effect. When the battery management unit 3 is installed, the battery management unit 3 can be inserted into the accommodating groove 21 along the positioning structure 211, and there is no need to adjust the battery management unit 3 again after insertion s position.
  • the positioning structure 211 may adopt a structure such as a positioning column or a positioning block.
  • the positioning posts or positioning blocks may be provided in pairs on the left and right sides of the accommodating groove 21, and the spacing between the positioning posts or positioning blocks provided in pairs is equivalent to the thickness of the battery management unit 3, so The end of the post or positioning block is just pressed against the two large surfaces of the battery management unit 3, so as to fix the battery management unit 3 in the accommodating groove 21.
  • the battery management unit 3 may include a battery management circuit board 31 and a housing 32.
  • the battery management circuit board 31 is disposed in the housing 32.
  • the housing 32 includes a front cover and a back cover, and the front cover and the back cover cooperate to form a cavity for accommodating the battery management circuit board 31.
  • the battery management circuit board 31 is disposed in a cavity formed by the front cover and the rear cover.
  • the casing 32 can protect the battery management circuit board 31, and can prevent the circuit management circuit board 31 from contacting with the middle board 2 to cause a fault such as a circuit short circuit.
  • the number of the fixing ears 321 is four, and the four fixing ears 321 are disposed on the middle and upper parts of the two large surfaces of the housing 32, The surfaces of the two large faces protrude outward.
  • the number of the fixing ears 321 may be 2, 3, etc., and the fixing ears 321 may also be directly provided on the top surface of the housing 32 and protrude in the lateral direction.
  • an elastic pad 33 is provided at the bottom of the middle plate 2, and the elastic pad 33 may be made of elastic materials such as rubber and silicone.
  • the number of the elastic pads 33 may be two, and they are respectively disposed on both sides of the bottom of the casing 32.
  • the battery management unit 3 is in contact with the bottom of the battery module through the elastic pad 33.
  • the bolt 7 locks the battery management unit 3
  • the battery management unit 3 moves down to make the elastic pad 33 presses the bottom of the battery module, so the assembly error of the battery management unit 3 in the vertical direction can be eliminated.
  • the bottom of the side plate 12 is provided with an L-shaped flange 121, and the L-shaped flange 121 may be directed from the bottom of the side plate 12 to the inner side (ie, the The unit cell 41 is bent).
  • the L-shaped flange 121 is bent to the side, so the bottom of the unit battery 41 and the middle plate 2 can be located on the upper surface of the L-shaped flange 121, so that the unit battery 41 and all
  • the bottom of the middle plate 2 plays a limiting role.
  • An embodiment of the present application also provides a method for manufacturing a battery module, including:
  • the middle plate 2 is installed between the two battery packs 4; the middle plate 2 is provided with an accommodating groove 21 therein.
  • the manufacturing method further includes:
  • the battery management unit 3 is connected to the sampling line 5 of the unit battery 41.
  • the manufacturing method further includes:
  • the battery pack 4 is installed in the accommodating cavity of the module frame 1.
  • Installing the battery management unit 3 in the accommodating slot 21 of the midplane 2 includes:
  • the battery management circuit board 31 and the housing 32 are installed in the accommodating groove 21 of the middle board 2; the battery management circuit board 31 is disposed in the housing 32.
  • the housing 32 is provided with a fixing ear 321, and the manufacturing method further includes:

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

Abstract

本申请涉及电池技术领域，提供了一种电池模组及制造方法，电池模组，包括：两组以上的电池组，每组所述电池组包括两个以上的单体电池；模组框架，包括端板和侧板，所述端板与所述侧板围成固定所述电池组的容置腔；中板，所述中板设置于两个所述电池组之间，内部设置有容置槽；电池管理单元，设置于所述中板的所述容置槽内，与所述单体电池的采样线连接。电池管理单元设置于中板内部的容置槽内，可防止单体电池膨胀压力而导致的电池管理单元失效；并且将所述电池管理单元设置于所述中板内还可防止单体电池与汇流线路发热而导致的温度过高，从而大大提高了电池管理单元的可靠性。

Description

一种电池模组及制造方法
本申请要求于2018年10月30日提交中国专利局、申请号为201821773716.5、发明名称为“一种电池模组”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
本申请涉及电池技术领域，特别是涉及一种电池模组及制造方法。
背景技术
电池模组中包含有多个单体电池，为了监测各单体电池的电压、温度等参数，通常在电池模组内设置有电池管理单元。在现有技术中,所述电池管理单元通常是设置于所述电池模组的其中一端板上，或与汇流线路一同设置于所述单体电池上方的线束隔离板上。
由于单体电池膨胀时会挤压所述端板，因此若所述电池管理单元设置于所述端板上，则存在电池管理单元受压变形而失效的风险。而由于单体电池和汇流线路在工作时会产生大量的热量，若所述电池管理单元设置于所述线束隔离板上，则存在电池管理单元受热，导致温度偏高的技术问题。
申请内容
为此，需要提供一种新的电池模组及制造方法，用于解决上述技术存在的电池管理单元易受压失效的技术问题。
为实现上述目的，本申请一方面提供了一种电池模组，包括：
两组以上的电池组，每组所述电池组包括两个以上的单体电池；
模组框架，包括端板和侧板，所述端板与所述侧板围成固定所述电池组的容置腔；
中板，所述中板设置于两个所述电池组之间，内部设置有容置槽；
电池管理单元，设置于所述中板的所述容置槽内，与所述单体电池的 采样线连接。
进一步的，所述容置槽由所述中板的顶部向底部方向凹陷。
进一步的，所述容置槽的两侧设置有定位结构，所述电池管理单元的两侧与所述定位结构接触，所述电池管理单元的前、后表面与所述容置槽的内壁之间具有间隙。
进一步的，所述电池管理单元包括电池管理电路板和壳体，所述电池管理电路板设置于所述壳体内。
进一步的，所述的壳体设置有固定耳，所述固定耳通过紧固件与所述中板的顶部固定。
进一步的，所述中板的底部设置有弹性垫。
进一步的，所述中板的底部的两侧分别设置有凹槽，所述弹性垫的顶部固定于所述凹槽内。
进一步的，所述单体电池的采样线与所述电池管理单元的顶部连接。
进一步的，所述侧板的底部设置有L形翻边，所述单体电池的底部位于所述L形翻边上。
进一步的，所述电池模组的输出电极设置于所述中板的上表面。
本申请另一方面提供了一种电池模组的制造方法，其中，所述制造方法包括：
将中板设置于两个电池组之间；所述中板内部设置有容置槽；
将电池管理单元设置于所述中板的所述容置槽内。
进一步的，所述制造方法还包括：
将所述电池管理单元与单体电池的采样线连接。
进一步的，所述制造方法还包括：
将所述电池组设置于模组框架的容置腔。
进一步的，所述将电池管理单元设置于所述中板的所述容置槽内包括：
将电池管理电路板和壳体设置于所述中板的所述容置槽内；所述电池管理电路板设置于所述壳体内。
进一步的，所述壳体上设置有固定耳，所述制造方法还包括：
将所述固定耳与所述中板的顶部固定。
区别于现有技术，上述技术方案包括两组以上的电池组，两组电池组之间设置有所述中板，将电池管理单元设置于中板内部的容置槽内，可防止单体电池膨胀压力而导致的电池管理单元失效；并且将所述电池管理单元设置于所述中板内还可防止单体电池与汇流线路发热而导致的温度过高，从而大大提高了电池管理单元的可靠性。
附图说明
图1为具体实施方式所述电池模组的结构示意图；
图2为具体实施方式所述电池模组的爆炸图；
图3为图1中A部分的局部放大图；
图4为图3中未设置电池管理单元时的示意图；
图5为具体实施方式中所述电池管理单元与所述中板装配好后的俯视图；
图6为具体实施方式中所述电池管理单元与弹性垫的装配示意图；
图7为具体实施方式中所述电池管理单元与所述中板的装配示意图；
图8为具体实施方式中所述电池管理单元的爆炸图；
图9为具体实施方式中所述侧板与中板的连接示意图(由底部往上观看)；
附图标记说明：
1、模组框架；
11、端板；
12、侧板；
121、翻边；
13、盖板；
2、中板；
21、容置槽；
211、定位结构；
3、电池管理单元；
31、电池管理电路板；
32、壳体；
321、固定耳；
322、凹槽；
33、弹性垫；
4、电池组；
41、单体电池；
42、负极输出电极；
43、正极输出电极；
5、采样线；
6、隔离板；
7、螺栓。
此处的附图被并入说明书中并构成本说明书的一部分，示出了符合本申请的实施例，并与说明书一起用于解释本申请的原理。
具体实施方式
为详细说明技术方案的技术内容、构造特征、所实现目的及效果，以下结合具体实施例并配合附图详予说明。
请参阅图1至图9，本实施例提供了一种电池模组。
如图1所示和图2所示，所述电池模组包括：模组框架1、两个以上的电池组4、中板2和电池管理单元3。
其中，所述电池组4由两个以上的单体电池41前后排列组成，相邻 的两个所述单体电池41的壳体大面相对设置。所述单体电池41是电池模组的储能单元，用于存储电能并对外提供电能。电池组4中的所述单体电池41可采用串联或并联等方式连接，并且，每组所述电池组4可分别设置有输入正极输出电极与输出负极输出电极。当所述电池组4内有多个所述单体电池41时，所述电池组4可形成单体电池41的壳体大面朝向两端的长方体结构。图1中坐标系Z1为X轴，即长度方向，Z2为Y轴，即宽度方向，Z3为Z轴，即高度方向。
所述模组框架1包括两个相对设置的端板11以及两个相对设置的侧板12，所述端板11与所述侧板12首尾相互连接，围成用于容置所述电池组4的容置腔(即所述电池组4放置的位置)。所述模组框架1可以起到固定和保护所述电池组4的作用，防止电池组4以及所述单体电池41移位或被外部物体撞击或划破。所述模组框架1可以由铝合金或钢片等金属片材连接而成。如图1和图2所示，所述模组框架1还可包括盖板13，所述盖板13设置于所述电池组4上的上方，起到顶部防护的作用。
如图2所示，所述电池组4的容置腔内至少可同时容置两组所述电池组4，并且所述两组电池组4沿长度方向前后设置。所述中板2设置于所述两组电池组4之间，所述中板2的两个大面分别与所述两组电池组4的一端面相对，所述两组电池组4的另一端分别与两个所述端板11相对。所述端板11一方面可限位所述电池组4以及单体电池41的位置，另一方面可吸收单体电池41膨胀时的应力，防止单体电池41膨胀破裂。其中，所述模组框架的端部是指模组框架长度方向的一端。
所述中板2与所述端板11相互平行的设置于两个所述端板11之间，所述中板2的内部设置有容置槽21。其中，所述中板2可设置于两个端板11的中间位置，也可以设置于两个端板11之间的非中间位置，即所述中板2到两个端板11的距离可以是不相等的。所述中板2可以由金属材料或其他硬质材料制成。所述电池管理单元3设置于所述中板2的所述容置 槽21内，并且所述电池管理单元3与所述单体电池41的采样线5连接，从而采集所述单体电池41的温度、电压等数据。
所述电池管理单元3用于采集所述单体电池41的电压、温度等数据，并将采集的数据发送给电池模组外的电池管理系统。其中，所述电池管理单元3设置于所述中板2内部的容置槽21内，所述电池管理单元3与所述单体电池41的采样线5连接。所述采样线5可以与所述单体电池41的极柱电连接，从而采集电芯的电压数据，所述采样线5还可连接有温度传感器，所述温度传感器可以与所述单体电池41的壳体或极柱相接触，从而采集单体电池41的温度数据。
其中，所述中板2内部的所述容置槽21是指在所述中板2内部被部分挖空，从而形成具有能够容置所述电池管理单元3的槽体或空腔。所述容置槽21只要能够容置所述电池管理单元3，并使所述电池管理单元3的表面不超出所述中板2的前后两个大面即可。
所述容置槽21设置于所述中板2的内部，所述电池管理单元3的表面不会超出所述中板2的前后两个大面，从而使所述电池管理单元3不与所述电池组4的端面相接触。因此所述单体电池41膨胀时的压力直接作用于所述中板2上，而不会作用于所述电池管理单元3上，从而可防止单体电池41膨胀压力而导致的电池管理单元3变形失效。由于所述中板2是位于两个电池组4之间，其温度要低于单体电池41的上方，从而可避免电池管理单元3的温度过高。
如图2所示，在所述电池组4的顶部可设置有隔离板6，所述单体电池41的采样线5可以为柔性电路板，并且设置于所述电池组4顶部的所述隔离板6的上表面。所述柔性电路板又称为FPC，具有厚度薄、可弯折等优点，因此基本不会占用电池模组顶部的空间，有利保障电池模组的能量密度，同时，柔性电路板可弯折也便于采样线5布线。
如图3和图4所示，所述中板2内部的所述容置槽21可以由所述中 板2的顶部向底部方向凹陷形成，即所述容置槽21的开口设置于所述中板2的顶部，所述电池管理单元3由所述中板2的顶部插入至所述容置槽21内。并且所述电池管理单元3与采样线5的接插口也可设置于电池管理单元3的上部。采用这样的容置槽21结构，一方面便于电池管理单元3拆装，同时也便于采样线5与电池管理单元3连接；另一方面可使电池管理单元3与电池组4的端面隔离，电池组4的膨胀压力以及温度均不会直接作用于电池管理单元3上(相对于容置槽21开口设置于中板2侧面，具有更好的隔热和抗膨胀性能)。
如图3和图4所示，所述电池模组的输出电极可设置于所述中板2的上表面。其中，在所述中板2顶部的两侧均设置了正极输出电极43和负极输出电极42，其中，所述中板2两侧的所述正极输出电极43与负极输出电极42为对应侧的所述电池组4的输出电极，所述正极输出电极43与负极输出电极42对应连接于所述电池组4的正极输出电极柱与负极输出电极柱。将所述输出电极设置于所述中板2的顶部，可充分利用电池模组中部的空间，节省电池模组两端的位置，有利于提高电池模组的能量密度。
如图4至图7所示，在所述容置槽21的两侧设置有定位结构211，其中，所述定位结构211与所述电池管理单元3的两侧相接触，用于固定所述电池管理单元3在所述容置槽21内的位置，其使电池管理单元3在所述容置槽21内不会晃动。特别是限制所述电池管理单元3在容置槽21的厚度方向(即图中的Z1轴方向)晃动，从而使所述电池管理单元3的前、后表面与所述容置槽21的内壁之间具有间隙。
在不同的实施方式中，所述定位结构211具有不同结构形式。如图4所示，所述定位结构211为槽状结构，即在所述容置槽21的左右两侧分别设置了另一凹槽(即所述211所指位置)，该凹槽的宽度与所述电池管理单元3的厚度相当，从而可使所述电池管理单元3的两侧稳稳的卡在所述凹槽内，从而不会晃动。并且所述凹槽的宽度小于所述容置槽21的宽 度，使所述电池管理单元3的前、后表面与所述容置槽21的内壁之间具有间隙，其中，所述间隙至少为1mm。
由于在容置槽21内设置了所述定位结构211，使所述电池管理单元3的前、后表面与所述容置槽21的内壁之间具有间隙，从而为所述中板2因单体电池41膨胀而导致的变形预留空间，使其不会挤压到所述电池管理单元3。并且所述定位结构211还具有导向作用，当安装所述电池管理单元3时，所述电池管理单元3可沿所述定位结构211插入容置槽21内，插入后无需再次调整电池管理单元3的位置。
在其他实施方式中，所述定位结构211可采用定位柱或定位块等结构。其中，定位柱或定位块可成对设置于所述容置槽21的左右两侧，并且成对设置的定位柱或定位块之间的间距与所述电池管理单元3的厚度相当，使定位柱或定位块的末端正好顶压于所述电池管理单元3的两个大面，从而将所述电池管理单元3固定在容置槽21内。
如图8所示，所述电池管理单元3可包括电池管理电路板31和壳体32，所述电池管理电路板31设置于所述壳体32内。所述壳体32包括前盖和后盖，所述前盖和后盖配合形成容置所述电池管理电路板31的空腔。所述电池管理电路板31设置于所述前盖和后盖所组成围成的空腔内。壳体32对所述电池管理电路板31可起到防护作用，可防止所述电池管理电路板31与中板2接触而导致的电路短路等故障。
在所述的壳体32上还设置有固定耳321，所述固定耳321通过螺栓7等紧固件与所述中板2的顶部固定。通过所述固定耳321可将所述电池管理单元3固定于所述中板2上，防止电池管理单元3在所述容置槽21内沿竖直方向上下移动。
在图5所示实施方式中，所述固定耳321的个数为四个，四个所述固定耳321设置于所述壳体32的两个大面的中上部，由所述壳体32两个大面的表面向外凸出。当然，在其他实施方式中，所述固定耳321的个数可 以为2个、3个等，所述固定耳321也可直接设置于所述壳体32的顶面并向侧面方向凸出。
如图6所示，所述中板2的底部设置有弹性垫33，所述弹性垫33可以由橡胶、硅胶等弹性材料制成。所述弹性垫33的个数可以为2个，并分别设置于所述壳体32底部的两侧。所述电池管理单元3通过所述弹性垫33与所述电池模组的底部相接触，当所述螺栓7将所述电池管理单元3锁紧时，电池管理单元3下移使所述弹性垫33压紧电池模组底部，因此，可消除电池管理单元3在竖直方向上的装配误差。
为了便于安装所述弹性垫33，在所述壳体32的底部的两侧分别设置有凹槽322，所述弹性垫33的顶部固定于所述凹槽322内，从而使所述弹性垫33固定于所述壳体32的底部。通过设置所述凹槽322可保证所述弹性垫33的在连接强度，防止其脱落。当然，在其他实施方式中，所述弹性垫33个数可以为3个以上，并且所述弹性垫33还可通过胶粘或螺栓固定等其他方式固定所述所示壳体32的底部。
如图9所示，在一实施方式中，所述侧板12的底部设置有L形翻边121，所述L形翻边121可以由所述侧板12的底部向内侧方向(即所述单体电池41所在方向)弯折形成。所述L形翻边121向侧弯折，因此所述单体电池41以及所述中板2的底部可位于所述L形翻边121的上表面，从而对所述单体电池41以及所述中板2底部起到限位作用。
本申请实施例还提供了一种电池模组的制造方法，包括：
将中板2安装于两个电池组4之间；中板2内部设置有容置槽21。
将电池管理单元3安装于中板2的容置槽21内。
进一步的，制造方法还包括：
将电池管理单元3与单体电池41的采样线5连接。
进一步的，制造方法还包括：
将电池组4安装于模组框架1的容置腔。
将电池管理单元3安装于中板2的容置槽21内包括：
将电池管理电路板31和壳体32安装于中板2的容置槽21内；电池管理电路板31设置于壳体32内。
进一步的，壳体32上设置有固定耳321，该制造方法还包括：
将固定耳321与中板2的顶部固定。
需要说明的是，在本申请的描述中，除非另有明确的规定和限定，术语“第一”、“第二”、仅用于描述的目的，而不能理解为指示或暗示相对重要性；除非另有规定或说明，术语“多个”是指两个或两个以上；术语“连接”、“固定”等均应做广义理解，例如，“连接”可以是固定连接，也可以是可拆卸连接，或一体地连接，或电连接；可以是直接相连，也可以通过中间媒介间接相连。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本发明中的具体含义。
本说明书的描述中，需要理解的是，本申请实施例所描述的“上”、“下”、“左”、“右”等方位词是以附图所示的角度来进行描述的，不应理解为对本申请实施例的限定。此外，在上下文中，还需要理解的是，当提到一个元件连接在另一个元件“上”或者“下”时，其不仅能够直接连接在另一个元件“上”或者“下”，也可以通过中间元件间接连接在另一个元件“上”或者“下”。

Claims (15)

  1. 一种电池模组，包括：
    两组以上的电池组，每组所述电池组包括两个以上的单体电池；
    模组框架，包括端板和侧板，所述端板与所述侧板围成固定所述电池组的容置腔；
    中板，所述中板设置于两个所述电池组之间，内部设置有容置槽；
    电池管理单元，设置于所述中板的所述容置槽内，与所述单体电池的采样线连接。
  2. 根据权利要求1所述的电池模组，所述容置槽由所述中板的顶部向底部方向凹陷。
  3. 根据权利要求2所述的电池模组，所述容置槽的两侧设置有定位结构，所述电池管理单元的两侧与所述定位结构接触，所述电池管理单元的前、后表面与所述容置槽的内壁之间具有间隙。
  4. 根据权利要求1所述的电池模组，所述电池管理单元包括电池管理电路板和壳体，所述电池管理电路板设置于所述壳体内。
  5. 根据权利要求4所述的电池模组，所述的壳体设置有固定耳，所述固定耳通过紧固件与所述中板的顶部固定。
  6. 根据权利要求1所述的电池模组，所述中板的底部设置有弹性垫。
  7. 根据权利要求6所述的电池模组，所述中板的底部的两侧分别设置有凹槽，所述弹性垫的顶部固定于所述凹槽内。
  8. 根据权利要求1所述的电池模组，所述单体电池的采样线与所述电池管理单元的顶部连接。
  9. 根据权利要求1所述的电池模组，所述侧板的底部设置有L形翻边，所述单体电池的底部位于所述L形翻边上。
  10. 根据权利要求1所述的电池模组，所述电池模组的输出电极设置于所述中板的上表面。
  11. 一种电池模组的制造方法，其特征在于，所述制造方法包括：
    将中板设置于两个电池组之间；所述中板内部设置有容置槽；
    将电池管理单元设置于所述中板的所述容置槽内。
  12. 根据权利要求11所述的制造方法，其特征在于，所述制造方法还包括：
    将所述电池管理单元与单体电池的采样线连接。
  13. 根据权利要求11所述的制造方法，其特征在于，所述制造方法还包括：
    将所述电池组放置于模组框架的容置腔。
  14. 根据权利要求11-13任一项所述的制造方法，其特征在于，所述将电池管理单元设置于所述中板的所述容置槽内包括：
    将电池管理电路板和壳体设置于所述中板的所述容置槽内；所述电池管理电路板设置于所述壳体内。
  15. 根据权利要求14所述的制造方法，其特征在于，所述壳体上设置有固定耳，所述制造方法还包括：
    将所述固定耳与所述中板的顶部固定。
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