WO2024124635A1 - 电池包、车辆及电池包的制作方法 - Google Patents

电池包、车辆及电池包的制作方法 Download PDF

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Publication number
WO2024124635A1
WO2024124635A1 PCT/CN2022/143884 CN2022143884W WO2024124635A1 WO 2024124635 A1 WO2024124635 A1 WO 2024124635A1 CN 2022143884 W CN2022143884 W CN 2022143884W WO 2024124635 A1 WO2024124635 A1 WO 2024124635A1
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WO
WIPO (PCT)
Prior art keywords
battery
battery pack
built
box
pack according
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2022/143884
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English (en)
French (fr)
Inventor
温盛德
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eve Power Co Ltd
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Eve Power Co Ltd
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Filing date
Publication date
Application filed by Eve Power Co Ltd filed Critical Eve Power Co Ltd
Publication of WO2024124635A1 publication Critical patent/WO2024124635A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • B60L50/64—Constructional details of batteries specially adapted for electric vehicles
    • 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
    • H01M10/04—Construction or manufacture in general
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present application relates to the field of battery technology, and in particular to a battery pack, a vehicle, and a method for manufacturing a battery pack.
  • the battery pack includes a box body and multiple battery modules arranged in the box body. During assembly, it is divided into two assembly lines, namely the module assembly production line and the battery pack assembly production line.
  • the battery module includes a battery cell, an end plate and a side plate. During assembly, the battery cell is placed between the end plate and the side plate, and then the end plate and the side plate are welded to form a battery module, and then the battery module is assembled into the box body.
  • the battery pack produced by the above method requires the investment of two production lines and the installation of welding equipment, which increases the cost, and the steps are complicated, the production efficiency is low, and it is difficult to meet production needs.
  • the purpose of this application is to provide a battery pack, a vehicle and a method for manufacturing a battery pack to reduce costs and improve production efficiency.
  • the present application provides a battery pack, comprising an outer shell assembly and an internal box body, a connecting assembly and a plurality of battery cell blocks arranged in the outer shell assembly, wherein the outer shell assembly comprises an upper shell and a lower shell, the connecting assembly connects the internal box body and the lower shell, the internal box body is provided with a plurality of cavities, and the plurality of battery cell blocks are respectively accommodated in the plurality of cavities.
  • the present application provides a vehicle comprising the above-mentioned battery pack.
  • the present application provides a method for manufacturing a battery pack, which is used to manufacture the above-mentioned battery pack, comprising the following steps:
  • the plurality of battery cells are respectively installed into the plurality of cavities of the built-in box;
  • the upper shell is connected to the lower shell.
  • the present application provides a battery pack, a vehicle, and a method for manufacturing a battery pack, in which the battery cells are directly loaded into a built-in box, eliminating the module structure, avoiding welding and other steps in the traditional structure, speeding up the production rhythm, improving production efficiency, and meeting production capacity requirements.
  • the built-in box and the outer shell assembly are connected by a connecting assembly, and then assembled through the connecting assembly, which improves the connection reliability.
  • the built-in box and the outer shell assembly are supplied separately to avoid overly complex structures, reduce production difficulties, and improve structural reliability.
  • FIG1 is an exploded view of a battery pack provided in a specific embodiment of the present application.
  • FIG2 is a schematic diagram of a battery core block provided in a lower shell and a built-in box according to a specific embodiment of the present application;
  • FIG3 is a schematic diagram of a first voltage operating mode of a battery pack provided in a specific embodiment of the present application.
  • FIG4 is a schematic diagram of a second voltage operating mode of a battery pack provided in a specific embodiment of the present application.
  • FIG. 5 is a schematic diagram of a third voltage operating mode of a battery pack provided in a specific embodiment of the present application.
  • Shell assembly 11. Upper shell; 12. Lower shell; 121. Mounting beam; 13. Sheet metal panel; 14. Buffer cotton; 15. Mounting seat; 16. Glue ring;
  • Battery core block 41. First electrode connection terminal; 42. Second electrode connection terminal;
  • connection should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements.
  • connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements.
  • a first feature being “above” or “below” a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them.
  • a first feature being “above”, “above” and “above” a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature.
  • a first feature being “below”, “below” and “below” a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.
  • the present embodiment provides a battery pack, as shown in Figures 1 and 2, including an outer shell assembly 1 and an internal box body 2, a connecting assembly 3 and a plurality of battery cells 4 arranged in the outer shell assembly 1, the outer shell assembly 1 includes an upper shell 11 and a lower shell 12, the connecting assembly 3 connects the internal box body 2 and the lower shell 12, the internal box body 2 is provided with a plurality of cavities 2A, and the plurality of battery cells 4 are respectively accommodated in the plurality of cavities 2A.
  • the battery cells in this application are directly loaded into the built-in box 2, which cancels the module structure, avoids the welding steps in the traditional structure, speeds up the production rhythm, improves production efficiency, and meets production capacity requirements. There is no need to invest in a module production line, avoid end and side panel welding equipment, and save costs.
  • the built-in box 2 and the outer shell component 1 in this application are connected by a connecting component 3, and then assembled by the connecting component 3, which improves the connection reliability.
  • the built-in box 2 and the outer shell component 1 in this application are separately supplied, which avoids the structure being too complicated, reduces the production difficulty, and improves the structural reliability.
  • the built-in box 2 and the outer shell component 1 can be provided by different suppliers respectively.
  • the outer shell component 1 is made of sheet metal, and the outer shell component 1 can be provided by a supplier specializing in making sheet metal boxes.
  • the built-in box 2 includes an outer frame 21, a bottom plate 22 and a middle beam 23.
  • the outer frame 21 and the bottom plate 22 are connected to form a accommodating cavity.
  • the middle beam 23 is arranged in the accommodating cavity and divides the accommodating cavity into a plurality of cavities 2A.
  • the outer frame 21 and the middle beam 23 can be made of aluminum profile structure, and the three are fixed by welding or other connection methods, which can be provided by an aluminum profile supplier.
  • the battery pack further includes a liquid cooling plate 5, which is disposed on the upper end of the battery cell block 4 facing the side of the upper shell 11 to prevent the bottom of the battery pack from being hit by a ball, causing the liquid cooling plate 5 to be scrapped, thereby improving product reliability.
  • the battery pack further includes a waterproof rivet nut 6, which connects the liquid cooling plate 5 and the built-in box 2 to prevent condensed water from extending into the battery from the mounting hole at the top of the liquid cooling plate 5, and the upper shell 11 is connected to the waterproof rivet nut 6, which provides a mounting position for the upper shell 11 to facilitate assembly.
  • a structural adhesive layer 7 is provided between the battery block 4 and the bottom plate 22 of the built-in box 2, and a structural adhesive layer 7 is provided between the battery block 4 and the liquid cooling plate 5, so that the battery block 4 is reliably bonded to the liquid cooling plate 5 and the built-in box 2 through the structural adhesive layer 7, respectively, to prevent the battery block 4 from shaking.
  • a glue groove 221 is provided on the bottom plate 22, which is configured to be filled with glue to form a structural adhesive layer 7.
  • the battery pack also includes a temperature detection component, which is provided between the built-in box 2 and the battery block 4, and is configured to detect the temperature of the battery block 4 to avoid causing a fire.
  • the structural adhesive is first applied to the bottom plate 22 of the built-in box 2, and a temperature detection component such as a temperature sensor is installed, and then the battery block 4 is bonded to the built-in box 2 through the structural adhesive layer 7.
  • the length direction of the battery cell is the X direction
  • the thickness direction is the Y direction
  • the width direction is the Z direction.
  • the battery cell block 4 includes a plurality of battery cells, the plurality of battery cells are arranged along the thickness direction, and one side of the plurality of battery cells along the width direction faces the liquid cooling plate 5, and the plurality of battery cells are in contact with the liquid cooling plate 5, so that the heat dissipation of the plurality of battery cells is uniform.
  • a plurality of core blocks 4 are divided into two parts, and a plurality of core blocks 4 in each part are connected in series respectively.
  • the first part of the core blocks 4 is provided with two first electrode connection terminals 41
  • the second part of the core blocks 4 is provided with two second electrode connection terminals 42.
  • Each free first electrode connection terminal 41 and a corresponding second electrode connection terminal 42 can be electrically connected.
  • the two core blocks 4 located on the upper side are the first part
  • the two core blocks 4 located on the lower side are the second part.
  • the two core blocks 4 on the upper side are connected in series through the copper bar 8, and two first electrode connection terminals 41 are respectively led out, including a positive terminal and a negative terminal.
  • the two core blocks 4 on the lower side are connected in series through the copper bar 8, and two second electrode connection terminals 42 are respectively led out, including a positive terminal and a negative terminal.
  • a first electrode connection terminal 41 and a second electrode connection terminal 42 can be connected by a structure such as a relay. When a high voltage (600V) is required, as shown in FIG. 3 , the relay connects the two partial core blocks 4, and the other first electrode connection terminal 41 and the other second electrode connection terminal 42 are respectively connected to the outside for power supply.
  • the relay disconnects the two partial battery blocks 4, and selects the two first electrode connection terminals 41 or the two second electrode connection terminals 42 to connect to the outside for power supply.
  • the battery pack has two voltage working modes, and high and low voltages can be switched freely, which improves applicability.
  • the switching control is carried out through structures such as relays, and the operation is convenient and reliable.
  • the copper bus 8 is arranged between the battery blocks 4 to avoid structural interference.
  • the battery block 4 is connected with a wiring harness, which is configured to collect voltage, etc., and it can be referred to the prior art and will not be repeated.
  • the battery cell block 4 includes a plurality of battery cells, the positive and negative electrodes of the battery cells are located on both sides along the length direction, and the plurality of battery cells are arranged along the thickness direction.
  • the battery cell block 4 is provided with bars on both sides along the length direction of the battery cells, and the plurality of battery cells are connected by the bars, thereby realizing the series connection of the plurality of battery cells.
  • the bars are located on both sides of the battery cells to avoid interference with the structure of the liquid cooling plate 5.
  • a sealing layer is provided between the upper shell 11 and the lower shell 12 to protect the battery core block 4.
  • a mounting seat 15 is provided on the upper shell 11, which is configured to be connected to an external structure.
  • the mounting seat 15 is configured to be connected to a seat and an instrument panel.
  • the outer ring of the upper shell 11 is coated with glue to form a glue ring 16, which is configured to be bonded to the vehicle body.
  • the housing assembly 1 also includes a sheet metal panel 13, which is connected to the upper shell 11 and is configured to connect structures such as BMS and BDU.
  • BMS and BDU refer to the prior art and will not be described in detail.
  • connection assembly 3 includes a bonding structure and a fastener.
  • a structural glue is first applied to the lower shell 12 to form a bonding structure, and the built-in box 2 is bonded to the lower shell 12 through the bonding structure; thereafter, the built-in box 2 is connected to the lower shell 12 through fasteners such as screws or rivets.
  • the lower shell 12 is provided with a mounting beam 121, and the built-in box 2 is connected to the mounting beam 121 to prevent the lower shell 12 from being too thin and inconvenient to install.
  • the middle beam 23 is provided with an avoidance groove on one side facing the mounting beam 121, and the mounting beam 121 can pass through the avoidance groove to be connected to the middle beam 23, making the structure more compact.
  • a cushioning cotton 14 is laid inside the lower shell 12 to play a shock-absorbing role.
  • the mounting beam 121 is extended along the first direction to separate the bottom wall of the lower shell 12 into two parts along the second direction, the cushioning cotton 14 is extended along the second direction, and a plurality of cushioning cottons 14 are arranged along the first direction and laid on the bottom walls of the two parts of the lower shell 12.
  • the cushioning cotton 14 can also be laid in other ways, which are not limited.
  • This embodiment also provides a vehicle, including the above-mentioned battery pack, thereby reducing costs.
  • This embodiment also provides a method for manufacturing a battery pack, which is used to manufacture the above-mentioned battery pack, and includes the following steps:
  • the method for manufacturing a battery pack includes the following steps:
  • the built-in box 2, the upper shell 11, and the lower shell 12 are directly made of raw materials, and the battery block 4 is directly loaded into the built-in box 2, eliminating the battery module structure and battery module assembly, reducing the production difficulty, improving the production efficiency and reducing the production cost.
  • the assembly order of the built-in box 2, the lower shell 12 and the battery block 4 is not limited.
  • structural adhesive is firstly coated inside the lower shell 12 to form a bonding structure, the built-in box 2 is placed inside the lower shell 12 for bonding, and then the built-in box 2 is connected to the mounting beam 121 of the lower shell 12 by fasteners.
  • the liquid cooling plate 5 is bonded to the battery block 4 through the structural adhesive layer 7, and the liquid cooling plate 5 is fixed to the middle beam 23 and/or the outer frame 21 of the built-in box 2 through the waterproof rivet nuts 6;
  • the upper shell 11 is bonded to the sealant layer to achieve a sealed connection between the upper shell 11 and the lower shell 12; then, the upper shell 11 is fastened to the waterproof rivet nut 6 by a nut inserted through the upper shell 11; further, the upper shell 11 and the lower shell 12 are connected by a lock rivet connection (SPR) process;
  • SPR lock rivet connection

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  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Sustainable Development (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Energy (AREA)
  • Power Engineering (AREA)
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  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

本申请公开了一种电池包、车辆及电池包的制作方法。电池包包括外壳组件（1）和设于外壳组件（1）内的内置箱体（2）、连接组件（3）和多个电芯块（4），外壳组件（1）包括上壳和下壳，连接组件（3）连接内置箱体（2）和下壳，内置箱体（2）设有多个腔体（2A），多个电芯块（4）分别容置于多个腔体（2A）内。

Description

电池包、车辆及电池包的制作方法
本申请要求在2022年12月15日提交中国专利局、申请号为202211626230.X的中国专利申请的优先权，以上申请的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，尤其涉及一种电池包、车辆及电池包的制作方法。
 背景技术
电池包包括箱体和设于箱体内的多个电池模组，组装时分成两个组装线进行组装，即模组组装生产线和电池包组装生产线。电池模组包括电芯、端板和侧板，组装时，将电芯放置于端、侧板之间，再将端、侧板焊接形成电池模组，之后再将电池模组装入箱体内。然而，采用上述方法制作的电池包，需要投入两个生产线，设置焊接设备，提高了成本，并且步骤繁杂，生产效率低，难以满足生产需求。
 技术问题
本申请的目的在于提供一种电池包、车辆及电池包的制作方法，降低成本，提高生产效率。
 技术解决方案
第一方面，本申请提供一种电池包，包括外壳组件和设于所述外壳组件内的内置箱体、连接组件和多个电芯块，所述外壳组件包括上壳和下壳，所述连接组件连接所述内置箱体和所述下壳，所述内置箱体设有多个腔体，多个所述电芯块分别容置于多个所述腔体内。
第二方面，本申请提供一种车辆，包括上述的电池包。
第三方面，本申请提供一种电池包的制作方法，用于对上述的电池包进行制作，包括以下步骤：
将多个电芯块分别装入内置箱体的多个腔体内；
将内置箱体装入下壳内；
将上壳与所述下壳连接。
 有益效果
本申请的有益效果：本申请提供的一种电池包、车辆及电池包的制作方法，电芯直接装入内置箱体，取消了模组结构，避免了传统结构中的焊接等步骤，加快了生产节拍，提高了生产效率，满足产能需求。不需要投入模组生产线，避免端、侧板焊接设备，节约了成本。内置箱体和外壳组件通过连接组件连接，之后通过连接组件组装，提高了连接可靠性。内置箱体和外壳组件分别来料，避免结构过于复杂，降低了生产难度，提高了结构可靠性。
 附图说明
图1是本申请的具体实施方式提供的电池包的爆炸图；
图2是本申请的具体实施方式提供的电芯块设于下壳和内置箱体的示意图；
图3是本申请的具体实施方式提供的电池包的第一种电压工作模式示意图；
图4是本申请的具体实施方式提供的电池包的第二种电压工作模式示意图；
图5是本申请的具体实施方式提供的电池包的第三种电压工作模式示意图。
附图标记说明：
1、外壳组件；11、上壳；12、下壳；121、安装梁；13、钣金面板；14、缓冲棉；15、安装座；16、胶水圈；
2、内置箱体；21、外边框；22、底板；221、胶水槽；23、中间梁；2A、腔体；
3、连接组件；
4、电芯块；41、第一电极连接端；42、第二电极连接端；
5、液冷板；6、防水拉铆螺母；7、结构胶层；8、铜排。
 本发明的实施方式
在本申请的描述中，除非另有明确的规定和限定，术语“相连”、“连接”、“固定”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本申请中的具体含义。
在本申请中，除非另有明确的规定和限定，第一特征在第二特征之“上”或之“下”可以包括第一和第二特征直接接触，也可以包括第一和第二特征不是直接接触而是通过它们之间的另外的特征接触。而且，第一特征在第二特征“之上”、“上方”和“上面”包括第一特征在第二特征正上方和斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”包括第一特征在第二特征正下方和斜下方，或仅仅表示第一特征水平高度小于第二特征。
本实施例提供了一种电池包，如图1和图2所示，包括外壳组件1和设于外壳组件1内的内置箱体2、连接组件3和多个电芯块4，外壳组件1包括上壳11和下壳12，连接组件3连接内置箱体2和下壳12，内置箱体2设有多个腔体2A，多个电芯块4分别容置于多个腔体2A内。
本申请中的电芯直接装入内置箱体2，取消了模组结构，避免了传统结构中的焊接步骤，加快了生产节拍，提高了生产效率，满足产能需求。不需要投入模组生产线，避免端、侧板焊接设备，节约了成本。本申请中的内置箱体2和外壳组件1通过连接组件3连接，之后通过连接组件3组装，提高了连接可靠性。本申请中的内置箱体2和外壳组件1分别来料，避免结构过于复杂，降低了生产难度，提高了结构可靠性。
内置箱体2和外壳组件1可以分别由不同供应商提供。在一种实施例中，外壳组件1由钣金制成，外壳组件1可以由专门制作钣金箱体的供应商提供。在一种实施例中，内置箱体2包括外边框21、底板22和中间梁23，外边框21和底板22连接形成容纳腔，中间梁23设于容纳腔内，并将容纳腔分隔为多个腔体2A，外边框21和中间梁23可以采用铝型材结构，三者进行焊接等连接方式进行固定，其可以由铝型材供应商提供。
在一种实施例中，如图1所示，电池包还包括液冷板5，液冷板5设于电芯块4的上端朝向上壳11的一侧，避免电池包底部遭受球击，导致液冷板5报废，提高了产品可靠性。在一种实施例中，电池包还包括防水拉铆螺母6，防水拉铆螺母6连接液冷板5和内置箱体2，避免冷凝水从液冷板5顶部的安装孔伸入到电池内部，并且上壳11连接于防水拉铆螺母6，防水拉铆螺母6为上壳11提供安装位，方便组装。
在一种实施例中，如图1所示，电芯块4和内置箱体2的底板22之间设有结构胶层7，电芯块4和液冷板5之间设有结构胶层7，使电芯块4分别通过结构胶层7可靠地粘接连接在液冷板5和内置箱体2上，避免电芯块4晃动。进一步地，底板22上设有胶水槽221，设置为填充容纳胶水以形成结构胶层7。在一种实施例中，电池包还包括温度检测件，温度检测件设于内置箱体2和电芯块4之间，设置为检测电芯块4的温度，避免引发火灾。组装时，首先将结构胶涂覆在内置箱体2的底板22上，安装温度传感器等温度检测件，之后将电芯块4通过结构胶层7粘接在内置箱体2上。
如图1所示，电芯的长度方向为X向、厚度方向为Y向、宽度方向为Z向。在一种实施例中，电芯块4包括多个电芯，多个电芯沿厚度方向排列，且多个电芯沿宽度方向的一侧均朝向液冷板5，多个电芯均与液冷板5接触，使多个电芯散热一致。
在一种实施例中，如图3-图5所示，多个电芯块4分成两个部分，每个部分的多个电芯块4分别串联，第一部分电芯块4设有两个第一电极连接端41，第二部分电芯块4设有两个第二电极连接端42，每一个自由的第一电极连接端41和一个对应的第二电极连接端42能够电连接。以设有四个电芯块4为例进行示例性说明，位于上侧的两个电芯块4为第一部分，位于下侧的两个电芯块4为第二部分，上侧两个电芯块4通过铜排8串联，分别引出两个第一电极连接端41，包括正极端和负极端。下侧两个电芯块4通过铜排8串联，分别引出两个第二电极连接端42，包括正极端和负极端。一个第一电极连接端41和一个第二电极连接端42可以通过继电器等结构连接。当需要高电压(600V)时，如图3所示，继电器使两个部分电芯块4连接，另一个第一电极连接端41和另一个第二电极连接端42分别与外部连接进行供电。当需要低电压(300V)时，如图4和图5所示，继电器使两个部分电芯块4断开，选择两个第一电极连接端41或两个第二电极连接端42与外部连接进行供电。通过上述结构，实现了电池包具有两种电压工作模式，高低压自由切换，提高了适用性。通过如继电器等结构进行切换控制，操作方便可靠。具体地，铜排8设于电芯块4之间，避免结构干涉。进一步地，电芯块4上连接有线束，设置为采集电压等，参照现有技术即可，不再赘述。
在一种实施例中，电芯块4包括多个电芯，电芯的正极和负极位于沿长度方向的两侧，多个电芯沿厚度方向排列，电芯块4沿电芯长度方向的两侧分别设有巴片，多个电芯通过巴片连接，从而实现多个电芯串联，巴片位于电芯两侧，避免与液冷板5结构干涉。
在一种实施例中，如图1所示，上壳11和下壳12之间设有密封胶层，对电芯块4起到防护作用。具体地，上壳11上设有安装座15，设置为与外界结构连接，如电池包应用于车辆时，安装座15设置为与座椅以及仪表盘等连接。具体上壳11的外圈涂覆有胶水形成胶水圈16，设置为与车身粘接。在一种实施例中，外壳组件1还包括钣金面板13，钣金面板13连接于上壳11，设置为连接BMS及BDU等结构，具体BMS及BDU参照现有技术，不再赘述。在一种实施例中，连接组件3包括粘接结构和紧固件，组装时，先在下壳12上涂覆结构胶形成粘接结构，内置箱体2通过粘接结构粘接于下壳12；之后，内置箱体2通过如螺钉或铆钉等紧固件连接于下壳12。在一种实施例中，下壳12设有安装梁121，内置箱体2连接于安装梁121上，避免下壳12结构过薄，不便安装。在一种实施例中，中间梁23朝向安装梁121的一侧设有避让槽，安装梁121能够穿过避让槽以和中间梁23连接，使结构更紧凑。
进一步地，下壳12内铺设有缓冲棉14，起到减震作用。一种实施例中，安装梁121沿第一方向延伸设置，将下壳12的底壁分隔为沿第二方向的两个部分，缓冲棉14沿第二方向延伸设置，多个缓冲棉14沿第一方向排列铺设在下壳12两个部分的底壁上。其他实施例中，缓冲棉14也可以进行其他方式的铺设，不进行限定。
本实施例还提供一种车辆，包括上述的电池包，从而降低了成本。
本实施例还提供一种电池包的制作方法，用于对上述的电池包进行制作，包括以下步骤：
S11、将内置箱体2装入下壳12内；
S12、将多个电芯块4分别装入内置箱体2的多个腔体2A内；
S13、将上壳11与下壳12连接。
或者，另一种实施方式中，电池包的制作方法包括以下步骤：
S21、将多个电芯块4分别装入内置箱体2的多个腔体2A内；
S22、将内置箱体2装入下壳12内；
S23、将上壳11与下壳12连接。
通过以上步骤，内置箱体2、上壳11、下壳12直接来料，将电芯块4直接装入内置箱体2，取消了电池模组结构以及电池模组组装，降低了生产难度，提高了生产效率和降低了生产成本。具体，内置箱体2、下壳12和电芯块4的组装顺序不进行限定。
进一步地，先在下壳12内涂覆结构胶形成粘接结构，内置箱体2放入下壳12内进行粘接，之后，内置箱体2通过紧固件连接在下壳12的安装梁121上。
进一步地，在将上壳11与下壳12连接之前，还包括以下步骤：
S211、多个电芯通过巴片进行串联连接，并且内置箱体2打上结构胶形成结构胶层7，安装温度传感器；
S212、将电芯块4装入内置箱体2的腔体2A内
S213、多个电芯块4均装入腔体2A后，安装铜排8和线束，以便后续实现切换电压；
S214、电芯块4顶部打结构胶形成结构胶层7；
S215、液冷板5通过结构胶层7粘接在电芯块4上，通过防水拉铆螺母6将液冷板5固定在内置箱体2的中间梁23和/或外边框21上；
S216、在下壳12的折边处打上密封胶形成密封胶层；
S217、上壳11粘接在密封胶层上，实现上壳11和下壳12的密封连接；之后，通过螺母穿设于上壳11紧固连接在防水拉铆螺母6上；进一步地，采用锁铆连接(SPR)工艺连接上壳11和下壳12；
S218、将钣金面板13安装在上壳11上。

Claims (16)

  1. 一种电池包，其中，包括外壳组件（1）和设于所述外壳组件（1）内的内置箱体（2）、连接组件（3）和多个电芯块（4），所述外壳组件（1）包括上壳（11）和下壳（12），所述连接组件（3）连接所述内置箱体（2）和所述下壳（12），所述内置箱体（2）设有多个腔体（2A），多个所述电芯块（4）分别容置于多个所述腔体（2A）内。
  2. 根据权利要求1所述的电池包，其中，还包括液冷板（5），所述液冷板（5）设于所述电芯块（4）的上端朝向所述上壳（11）的一侧。
  3. 根据权利要求2所述的电池包，其中，所述电芯块（4）包括多个电芯，多个所述电芯沿厚度方向排列，且多个所述电芯沿宽度方向的一侧均朝向所述液冷板（5）。
  4. 根据权利要求2所述的电池包，其中，还包括防水拉铆螺母（6），所述防水拉铆螺母（6）连接所述液冷板（5）和所述内置箱体（2），所述上壳（11）连接于所述防水拉铆螺母（6）。
  5. 根据权利要求4所述的电池包，其中，所述电芯块（4）和所述内置箱体（2）的底板（22）之间设有结构胶层（7）；和/或所述电芯块（4）和所述液冷板（5）之间设有结构胶层（7）。
  6. 根据权利要求1所述的电池包，其中，多个所述电芯块（4）分成两个部分，每个部分的多个所述电芯块（4）分别串联，第一部分所述电芯块（4）设有两个第一电极连接端（41），第二部分所述电芯块（4）设有两个第二电极连接端（42），每一个自由的所述第一电极连接端（41）和一个对应的所述第二电极连接端（42）能够电连接。
  7. 根据权利要求1所述的电池包，其中，所述上壳（11）和所述下壳（12）之间设有密封胶层。
  8. 根据权利要求1所述的电池包，其特征在于，所述外壳组件（1）由钣金制成。
  9. 根据权利要求1所述的电池包，其中，所述内置箱体（2）包括外边框（21）、底板（22）和中间梁（23），所述外边框（21）和所述底板（22）连接形成容纳腔，所述中间梁（23）设于所述容纳腔内，并将所述容纳腔分隔为多个所述腔体（2A）。
  10. 根据权利要求1所述的电池包，其中，所述电芯块（4）包括多个电芯，所述电芯的正极和负极位于沿长度方向的侧面，多个所述电芯沿厚度方向排列，所述电芯块（4）沿所述电芯长度方向的侧面设有巴片，多个所述电芯通过巴片连接。
  11. 根据权利要求1所述的电池包，其中，所述连接组件（3）包括：
    粘接结构，所述内置箱体（2）通过所述粘接结构粘接于所述下壳（12）；和/或
    紧固件，所述内置箱体（2）通过所述紧固件连接于所述下壳（12）。
  12. 根据权利要求1-11任一项所述的电池包，其中，所述外壳组件（1）还包括钣金面板（13），所述钣金面板（13）连接于所述上壳（11）。
  13. 根据权利要求1-11任一项所述的电池包，其中，所述下壳（12）设有安装梁（121），所述内置箱体（2）连接于所述安装梁（121）上。
  14. 根据权利要求1-11任一项所述的电池包，其中，还包括温度检测件，所述温度检测件设于所述内置箱体（2）和所述电芯块（4）之间。
  15. 一种车辆，其中，包括权利要求1-14任一项所述的电池包。
  16. 一种电池包的制作方法，其中，用于对权利要求1-14任一项所述的电池包进行制作，包括以下步骤：
    将多个电芯块（4）分别装入内置箱体（2）的多个腔体（2A）内；
    将所述内置箱体（2）装入下壳（12）内；
    将上壳（11）与所述下壳（12）连接。
PCT/CN2022/143884 2022-12-15 2022-12-30 电池包、车辆及电池包的制作方法 Ceased WO2024124635A1 (zh)

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