WO2022017513A1 - 固定结构、电池箱和电池包 - Google Patents

固定结构、电池箱和电池包 Download PDF

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Publication number
WO2022017513A1
WO2022017513A1 PCT/CN2021/108225 CN2021108225W WO2022017513A1 WO 2022017513 A1 WO2022017513 A1 WO 2022017513A1 CN 2021108225 W CN2021108225 W CN 2021108225W WO 2022017513 A1 WO2022017513 A1 WO 2022017513A1
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WO
WIPO (PCT)
Prior art keywords
fixing structure
hole
box
box body
battery
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/CN2021/108225
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English (en)
French (fr)
Inventor
张万财
冯俊敏
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.)
Xiamen Haichen New Energy Technology Co Ltd
Original Assignee
Xiamen Haichen New Energy Technology Co Ltd
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 Xiamen Haichen New Energy Technology Co Ltd filed Critical Xiamen Haichen New Energy Technology Co Ltd
Priority to US17/918,781 priority Critical patent/US11749864B2/en
Priority to EP21846606.8A priority patent/EP4120445B1/en
Publication of WO2022017513A1 publication Critical patent/WO2022017513A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H01M50/244—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
    • H01M50/262—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present application relates to the field of power batteries, and in particular, to a fixed structure, a battery box and a battery pack.
  • Power batteries are power sources that provide power sources for various tools and equipment.
  • a power battery refers to a secondary battery that provides power for an electric vehicle, etc., to distinguish it from a starting battery for an automobile engine.
  • the power battery usually exists in the form of a battery pack, and the battery pack has a box for easy handling and installation.
  • the battery pack is usually composed of multiple battery packs, and is also equipped with a battery management system.
  • the battery pack is composed of a plurality of battery cells, which can provide relatively higher voltage and battery capacity.
  • the battery cell is the basic unit that constitutes the battery pack and the battery pack, and its voltage is generally 3 to 4V.
  • the battery pack has multiple battery cells combined in series and parallel, it is necessary to consider the stability of the installation and handling of the power battery in tools and equipment to avoid bumping or even damage to the battery due to shaking.
  • the present application proposes a fixed structure, a battery box and a battery pack.
  • the fixing structure is used for a battery pack
  • the battery pack includes a box body
  • the fixing structure is arranged on the outer wall of the box body
  • the fixing structure includes: a first connecting body, One end of the first connecting body is connected to the box body; a second connecting body, one end of the second connecting body is connected to the box body, and the second connecting body is spaced apart from the first connecting body ; a transition body, two ends of the transition body are respectively connected with one end of the first connecting body away from the box body and one end of the second connecting body away from the box body.
  • the first connecting body, the transition body and the second connecting body are connected in sequence to form an integral fixed structure. Therefore, the overall structure is highly stable and resistant to pulling and dragging.
  • the above-mentioned fixing structure has high strength. Therefore, after the box body is provided with the fixing structure, it can be moved or fixed to electrical equipment (such as electric vehicles) through the fixing structure, so that the box body can withstand relatively frequent and high-intensity motion operation, and at the same time, it is also beneficial for the battery to be stably fixed and relatively stationary with the electrical equipment to reduce battery shaking.
  • the fixing structure is a single piece.
  • the second connecting body has a plurality of connecting holes. This facilitates the handling of the box.
  • At least one of the plurality of connecting holes has a thread; and/or, at least one of the plurality of connecting holes is a smooth hole. Therefore, the fixed structure can be limited from both positive and negative directions, so that the installation operation is convenient and the flexibility is higher.
  • the transition body has through holes.
  • a portion of the through hole is opposite to the second connector in a direction from the first connector to the second connector.
  • connection hole includes a smooth hole, and the through hole is opposite to the smooth hole.
  • the through hole includes a first hole segment and a second hole segment that are connected in sequence, and the first hole segment is located at a portion of the second hole segment close to the first connecting body.
  • the width of the second hole segment is greater than the width of the first hole segment.
  • the transition body includes a first connecting portion, a bending portion, and a second connecting portion that are connected in sequence, wherein an end of the first connecting portion away from the bending portion is connected to the first connecting portion.
  • One end of the first connecting body that is far away from the box body is connected, and one end of the second connecting part that is far away from the bending part is connected to one end of the second connecting body that is far away from the box body.
  • a connecting portion and the second connecting portion form an angle with each other, the first connecting portion is opposite to the second connecting body, and the through hole extends from the first connecting portion to the second connecting portion.
  • the bending portion is arc-shaped.
  • the second connecting body is perpendicular to the second connecting portion.
  • the included angle formed by the first connecting portion and the second connecting portion is an obtuse angle.
  • the battery box according to the embodiment of the present application includes a box body with an inner cavity; the above-mentioned fixing structure is fixed to the outer wall of the box body.
  • the box body and the fixing structure are one piece.
  • the battery pack according to the embodiment of the present application includes the above-mentioned battery case.
  • the fixing structure provided by the embodiment of the present application has appropriate structural strength, therefore, the battery box provided with the fixing structure is easier to be firmly limited, thereby helping to ensure the stability of the batteries stored in the battery box It can avoid the slow movement of the battery in the process of carrying the battery with the battery box, and it is also beneficial to firmly combine it with the electrical equipment/power supply equipment.
  • FIG. 1 is a schematic structural diagram of a box in an example of the application.
  • FIG. 2 shows a schematic structural diagram of the fixing structure in the example of the present application and the box body of FIG. 1;
  • FIG. 3 shows a partially enlarged structural schematic diagram of the E part of FIG. 2;
  • FIG. 4 shows a schematic structural diagram of the fixing structure in the embodiment of the present application from a first perspective
  • FIG. 5 shows a schematic structural diagram of the fixing structure in the embodiment of the present application from a second viewing angle
  • FIG. 6 shows a schematic structural diagram of the fixing structure in the embodiment of the present application from a third viewing angle
  • FIG. 7 shows a schematic diagram of the structure of the fixing device and the box body.
  • Icons 100-box; 101-internal cavity; 102-outer wall; 200-battery box; 201-suspension; 202-bolt connection; 300-fixed structure; 301-first connection body; 302-second connection 303-transition body; 3031-connection hole; 3032-thread; 3033-through hole; 401-first connection part; 402-bending part; 403-second connection part; 501-first hole segment; The second hole segment; 601 - the first part; 602 - the second part.
  • Electric vehicles usually use a power battery as a power source, and generally use a battery pack formed by a combination of multiple single cells. In order to fix the battery pack, the battery pack is placed in the battery box, and then the battery box is installed in the vehicle body.
  • the battery box Because the car is often in high-speed motion and starts and stops quickly, the battery box is subjected to a great momentary force. Therefore, it is necessary for the battery box to be stable relative to the car to ensure the stability of the battery pack. In addition, during the process of installing the battery pack, the battery box may also need to be moved (eg, hoisted, etc.) frequently, and therefore, it is also necessary to maintain a smooth movement during the movement.
  • the box body is generally a flat cuboid structure with a space/cavity inside for storing the battery.
  • various appropriate structural parts are welded on its outer wall, and then the box is operated through the structural parts.
  • these structural parts have low structural strength and are easily damaged, especially after being transported for many times.
  • an example of the present application provides a fixing structure 300 , please refer to FIG. 4 to FIG. 6 .
  • the structural member for fixing and the structural member for hoisting it is an integral structure, and the fixing structure 300 and the box body 100 can form multiple binding sites, strength higher.
  • the box body 100 is at risk of being burned through by the high temperature of the welding operation, and the heat generated by the welding may affect the size and shape of the box body 100 .
  • the difficulty of the welding operation is relatively high, and the operation remains unchanged, resulting in a low product yield and a long production cycle.
  • the fixing structure 300 proposed in the examples of the present application, it is integrally formed (eg, extruded) with the box body 100 as a single piece. Therefore, welding of the case body 100 can be avoided, thereby overcoming the influence and damage to the case body 100 .
  • the fixing structure 300 is chosen to be integrally formed with the case 100 .
  • this does not mean that the fixing structure 300 in the example of the present application can only be formed with the box body 100 by means of integral molding. Regardless of the adverse effects of the welding operation or due to material selection and process adjustments, the welding operation will not have adverse effects or the effects will be compared with the advantages brought by the welding operation.
  • the fixing structure 300 can also be selectively welded to the box body 100 .
  • FIG. 1 shows a schematic structural diagram of a box body 100 .
  • the box body 100 is generally a flat rectangular parallelepiped structure. It has a bottom wall, a surrounding wall (including a front wall, a rear wall, a left wall and a right wall) and a top wall (not shown in the figure).
  • the box 100 is composed of a bottom wall, a front wall, and a rear wall. , the left wall plate, the right wall plate and the bottom wall are enclosed together, and the interior of the box body 100 forms an internal cavity 101 for accommodating the battery.
  • the inner wall of the case 100 may be provided with various suitable fixing structures such as grooves, holes, protrusions and the like.
  • structures such as holes can also be arranged in the box according to the design requirements.
  • the fixing structure 300 in the present application is used for a battery pack.
  • the battery pack includes the box body 100 described above.
  • the fixing structure 300 is disposed on the outer wall 102 of the box body 100 , which may be a bottom wall, or a surrounding wall and a top wall.
  • the fixing structure 300 in the embodiment of the present application is disposed on the outer surface of the surrounding wall in the box body 100 , that is, the portion of the outer wall 102 corresponding to the surrounding wall. It should be pointed out that, although the fixing structure 300 is described and shown based on the case 100 of the battery pack in this application, this is not intended to limit the fixing structure 300 to only the case 100 of the battery pack.
  • the fixing structure 300 can also be applied to other fields, rather than being limited to the battery field. In other fields with fixing, handling, and moving requirements, the fixing structure 300 can still have corresponding applications. And for different application scenarios, it can be modified appropriately, for example, size specifications, production materials, production methods and so on.
  • the fixing structure 300 can be applied to the motherboard installation, the graphics card installation, the hard disk installation and so on of the computer.
  • FIG. 2 is a schematic structural diagram of a battery case 200 formed by cooperating with the case body 100 of FIG. 1 and the fixing structure 300 in the example of the present application.
  • FIG. 2 discloses three fixing structures 300 disposed on the outer wall 102 of the box body 100 .
  • the three fixing structures 300 are arranged at intervals along the outer wall 102 of the box body 100 so as to substantially cover the outer wall 102 provided.
  • the three fixing structures 300 are also beneficial to exert a more uniform force on the box body 100, so as to avoid the hidden danger of damage caused by too large local force.
  • the fixing part can be set with different structural parts correspondingly, so as to connect it with other parts and limit the relative position.
  • a pin shaft, a bearing seat, etc. may also be provided.
  • the fixing structure 300 in the present application will be described in detail below with reference to the accompanying drawings ( FIG. 4 , FIG. 5 , and FIG. 6 ).
  • the fixing structure 300 is a roughly "U"-shaped structure, or it can also be considered as a roughly "C"-shaped structure structure. Therefore, in terms of structural appearance, it generally has an opening, and the opening side is combined/connected with the above-mentioned box body 100 .
  • the fixing structure 300 in the present application is a one-piece structure, therefore, there are no parts that are not substantially connected to each other.
  • the three fixing structures 300 are respectively arranged on the box body 100 at a distance from each other, that is, it can be considered that the three fixing structures 300 are not connected to each other.
  • FIG. 7 shows a fitting relationship between a split type fixing device and the outer wall 102 of the box body 100 (only a part is drawn).
  • the device includes a first part 601 and a second part 602, and the two parts are independent of each other, and the two parts are not connected. Therefore, the device can also be considered as a split-type fixture comprising independent components.
  • the fixing structure 300 of the example of the present application adopts a one-piece structure, so its structural strength is relatively higher, and thus it can withstand greater force.
  • the fixing structure 300 and the box body 100 in the present application form at least two interconnected connection positions, therefore, compared with the two independent connection positions of the two parts in FIG. The connection between the structure 300 and the box body 100 is stronger.
  • the fixing structure 300 mainly includes three parts, which are a first connecting body 301 , a transition body 303 and a second connecting body 302 , and the three parts are connected in sequence. It can be understood that one end of the first connecting body 301 is connected to the box body 100 , the first connecting body 301 and the second connecting body 302 are generally arranged opposite to each other, one end of the second connecting body 302 is connected to the box body 100 , and the second connecting body 302 is connected to the box body 100 .
  • the connecting body 302 and the first connecting body 301 are spaced apart, and two ends of the transition body 303 are respectively connected with one end of the first connecting body 301 away from the box body 100 and one end of the second connecting body 302 away from the box body 100 .
  • the fixing structure 300 is respectively connected to different parts of the box body 100 through the first connecting body 301 and the second connecting body 302, that is, the first connecting body 301 is combined with the first position of the box body 100; the second connecting body 302 is combined with the box The second position of the body 100, and the first position and the second position are adjacent to each other.
  • the fixing structure 300 is in the shape of a curved plate, which has a relatively large length and a relatively small thickness. Thus, for example, it can be considered to be constructed from a flat plate by suitable bending. In actual production, it can be produced together with the box body 100 by means of injection molding, extrusion molding, or the like.
  • the fixing structure 300 also has a plurality of connecting holes 3031 , such as at least two, disposed on the second connecting body 302 . This facilitates the installation of the battery pack. Further, at least one connection hole 3031 in the plurality of connection holes 3031 has threads; and/or, at least one connection hole 3031 in the plurality of connection holes 3031 is a smooth hole. For example, in the connecting holes 3031 provided in the second connecting body 302, there are at least two holes with different purposes. For example, one of the connection holes 3031 is provided with a thread 3032 , so that the connection hole 3031 with the thread 3032 can be connected with other structures through bolts, studs, etc., in all the connection holes 3031 .
  • one of the unthreaded holes is a smooth hole. Therefore, when the box body 100 is connected to other structures, a threaded hole and an unthreaded hole can be correspondingly provided in the other structures mentioned above. Therefore, when the box 100 is connected with the "other structures", the bolts can be connected from the front or the back.
  • the front connection is, for example, a bolt passing through the unthreaded hole of the second connecting body 302 , while the threaded hole on other structures is threaded for connection.
  • the reverse connection is, for example, a bolt passing through an unthreaded hole of other structures to be threadedly connected with a threaded hole on the second connecting body 302 .
  • connection hole 3031 with the thread 3032 provided on the second connection body 302 can be implemented by making threads on the inner wall of the connection hole 3031 , or by installing or fixing a nut/nut in the connection hole 3031 .
  • the nut may be buried in the connection hole 3031 , or partially buried in the connection hole 3031 while part of it is exposed from the connection hole 3031 .
  • the transition body 303 is provided with a through hole 3033 extending from the inner surface to the outer surface, that is, the through hole 3033 is arranged through the thickness direction of the transition body 303 .
  • the through hole 3033 can be used not only to cooperate with the suspension part 201 , but also to be used as a passage through which the connection hole 3031 of the bolt connection part 202 cooperates with the second connection body 302 , so as to facilitate the cooperation with the fixing structure 300 through other structural parts. , so that the battery box equipped with the fixing structure 300 can be more firmly limited, see FIG. 2 and FIG. 3 , and at the same time, the quality of the fixing structure 300 can be reduced to a certain extent.
  • the through hole 3033 is opposite to the second connection body 302 in the direction from the first connection body 301 to the second connection body 302 . Therefore, it is convenient for the bolt connecting piece 202 to pass through the through hole 3033 to fit with the connecting hole 3031 .
  • the connecting hole 3031 includes a smooth hole, and the through hole 3033 is opposite to the smooth hole.
  • the bolt connector 202 matched with the smooth hole needs to pass through the smooth hole to match with threaded holes or nuts on other structures, so a larger space is required for the bolt connector 202 to pass through the smooth hole.
  • the through hole 3033 and the smooth hole In contrast, an installation space can be provided for the bolted joint 202 .
  • the through hole 3033 includes a first hole segment 501 and a second hole segment 502 connected in sequence, and the first hole segment 501 is located close to the second hole segment 502 On one side of the first connecting body 301 , the width of the second hole segment 502 is greater than the width of the first hole segment 501 . Therefore, the through hole 3033 has a substantially "T" shape.
  • the suspension member 201 also a T-shaped structure
  • the transition body 303 includes a first connecting portion 401 , a bending portion 402 and a second connecting portion 403 that are connected in sequence, wherein an end of the first connecting portion 401 away from the bending portion 402 is away from the first connecting portion 301 .
  • the first connecting part 401 is opposite to the second connecting body 302 , and the through hole 3033 can be provided in either the first connecting part 401 of the transition body 303 or the second connecting part 403 of the transition body 303 , according to the requirements of different connection methods. choose.
  • the through hole 3033 extends from the first connecting portion 401 to the second connecting portion 403 through the bending portion 402 . Therefore, the through holes 3033 are provided in most areas of the entire transition body 303 , which can provide a larger space for movement, which facilitates the cooperation of other structural members as mentioned above, and can simultaneously perform the suspension member 201 and The arrangement of the bolt connections 202 can also reduce the mass of the fixing structure 300 to a certain extent. Further, the configuration form of the through hole 3033 can also be adjusted.
  • the through hole 3033 is selected and configured to have a first hole segment 501 located at the first connecting portion 401 and the transition portion 402 and a second hole segment 502 located at the second connecting portion 403, and the width of the first hole segment 501 is smaller than that of the second hole segment 501.
  • the width of the hole section 502 can form a snap-fit structure with other structural components to improve the convenience of use.
  • the second connecting body 302 of the fixing structure 300 is provided with the connecting hole 3031 , when the above-mentioned through hole 3033 is provided, the position of the through hole 3033 can be adjusted correspondingly considering the usage of the connecting hole 3031 .
  • the first hole there are two connecting holes 3031 , and one is an unthreaded hole (the first hole) and the other is a hole with threads 3032 (the second hole).
  • the first hole may face the aforementioned through hole 3033, so that the bolt connector 202 can pass through and be inserted into the first hole.
  • the second hole is for bolts to be inserted from other structures (such as the frame on which the battery box 200 is installed) and screwed together, the position of the fixing structure 300 corresponding to the second hole does not need to open the aforementioned through hole 3033 .
  • the through hole 3033 may not be opposite to the second hole.
  • the transition body 303 of the fixing structure 300 may be straight or bent.
  • the bent shape is selected.
  • the structural dimensions of the first connecting body 301 and the second connecting body 302 may need to be additionally increased, for example, relative to the outer wall 102 of the box body 100 length.
  • the transition body 303 in the bent shape can improve the structural strength of the fixing structure 300 and enhance the impact resistance of the fixing structure.
  • the transition body 303 includes a first connecting portion 401 , a bending portion 402 and a second connecting portion 403 that are connected in sequence.
  • the first connecting portion 401 is connected to the first connecting body 301
  • the second connecting portion 403 is connected to the second connecting body 302
  • the first connecting portion 401 and the second connecting portion 403 form an angle with each other.
  • the bending method of the transition body 303 can also be selectively controlled by controlling the shape of the bending portion 402 and changing the positions of the two ends relative to the bending portion 402 .
  • the transition body 303 is bent in an arc-shaped manner, that is, the bending portion 402 is arc-shaped. Accordingly, the arc-shaped region of the transition body 303 is located at the bending portion 402 of the transition body 303 . In this way, the transition smoothness of the surface can be improved, the transition smoothness between the first connection part and the second connection part can be improved, and the problem of local stress can be avoided to a certain extent, and the life of the bending part can be improved.
  • the bending method of the transition body 303 can be described by the arrangement of the first connecting portion 401 and the second connecting portion 403.
  • the second connecting body 302 and the second connecting portion 403 are arranged in a criss-cross pattern, that is, the first connecting portion 401 and the second connecting portion 403 are arranged in a crisscross pattern.
  • the two connecting bodies 302 are perpendicular to the second connecting portion 403 .
  • the installation convenience of the fixing structure 300 can be provided.
  • the second connecting body 302 generally extends in the horizontal direction
  • the second connecting portion 403 generally extends in the vertical direction, that is, the two are arranged at a right angle A.
  • the first connecting body 301 can be arranged obliquely upward, and the first connecting part 401 can be inclined downward, and the two can be arranged at an acute angle B.
  • the angle C between the first connecting part 401 and the second connecting part 403 is The obtuse angle, as shown in FIG. 4 , combined with the curved bending portion 402 can further improve the smoothness of its surface.
  • the surface transition can be made smoother and more natural, so that the excessive internal stress concentration can be reduced, so that the It is less prone to damage.
  • the usage mode of the transition body 303 can also be changed.
  • the first connecting body 301 and the first connecting part 401 are arranged in an inclined shape, so they can be used as the basis for other structures to hang; the second connecting body 302 and the second connecting part 403 are arranged in a criss-cross pattern, so , which can be used for fixing with fasteners such as bolts.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

一种固定结构（300），固定结构（300）用于电池包，电池包包括箱体（100），固定结构（300）设于所述箱体（100）的外壁，包括：第一连接体（301），第一连接体（301）的一端连接于箱体（100）；第二连接体（302），第二连接体（302）的一端连接于箱体（100），第二连接体（302）与第一连接体（301）间隔开；过渡体（303），过渡体（303）的两端分别与第一连接体（301）的远离箱体（100）的一端和第二连接体（302）的远离箱体（100）的一端连接。

Description

固定结构、电池箱和电池包
相关申请的交叉引用
本申请基于申请号为202010725247.5，申请日为2020年7月24日的中国专利申请提出，并要求该中国专利申请的优先权，该中国专利申请的全部内容在此引入本申请作为参考。
技术领域
本申请涉及动力电池领域，具体而言，涉及一种固定结构、电池箱和电池包。
背景技术
动力电池是为各种工具、设备提供动力来源的电源。一般地，动力电池指为电动汽车等提供动力的二次电池，以区别于汽车发动机的启动电池。
考虑到动力电池的使用场景以及电池的能量密度，动力电池通常是以电池包的形式存在，并且电池包具有箱体，以便进行搬运、安装。电池包通常是由多个电池组集合而成，同时还配备电池管理系统等。而电池组由多个电池单体集合而成，其能提供相对更高的电压和电池容量。其中，电池单体是构成电池包和电池组的基本单元，其电压一般为3至4V。
由于电池包中具有串并联结合的多个电池单体，因此，需要考虑动力电池在工具、设备中的安装、搬运的稳定性，避免电池晃动而发生磕碰，甚至损坏。
发明内容
为改善、甚至解决动力电池的安装、搬运的稳定性问题，本申请提出了固定结构、电池箱和电池包。
根据本申请实施例的固定结构，所述固定结构用于电池包，所述电池包包括箱体，所述固定结构设于所述箱体的外壁，所述固定结构包括：第一连接体，所述第一连接体的一端连接于所述箱体；第二连接体，所述第二连接体的一端连接于所述箱体，所述第二连接体与所述第一连接体间隔开；过渡体，所述过渡体的两端分别与所述第一连接体的远离所述箱体的一端和所述第二连接体的远离所述箱体的一端连接。
第一连接体、过渡体以及第二连接体依次连接形成整体式的固定结构，因此，其整体结构稳定高、抗拉扯和拖拽。换言之，上述固定结构具有较高的强度，因此，箱体设置该固定结构之后，可以通过该固定结构对其进行移动或固定于用电设备(如电动汽车)， 从而使箱体能够承受相对频繁和高强度的运动操作，同时还利于电池被稳定地固定、与用电设备保持相对静止，以减轻电池晃动。
在本申请的一些实施例中，所述固定结构为一体件。
在本申请的一些实施例中，所述第二连接体上具有多个连接孔。由此便于对箱体进行搬运。
在本申请的一些实施例中，多个所述连接孔中存在至少一个所述连接孔具有螺纹；和\或，多个所述连接孔中存在至少一个所述连接孔为光滑孔。因此，可以从正、反两个方向对固定结构进行限位，使安装操作便利且灵活性更高。
在本申请的一些实施例中，所述过渡体具有通孔。
在本申请的一些实施例中，所述通孔的部分在所述第一连接体至所述第二连接体的方向上与所述第二连接体相对。
在本申请的一些实施例中，所述连接孔包括光滑孔，所述通孔与所述光滑孔相对。
在本申请的一些实施例中，所述通孔包括依次连接的第一孔段和第二孔段，所述第一孔段位于所述第二孔段的靠近所述第一连接体的一侧，所述第二孔段的宽度大于所述第一孔段的宽度。
在本申请的一些实施例中，所述过渡体包括依次连接的第一连接部、弯折部以及第二连接部，其中，所述第一连接部的远离所述弯折部的一端与所述第一连接体的远离所述箱体的一端连接，所述第二连接部的远离所述弯折部的一端与所述第二连接体的远离所述箱体的一端连接，所述第一连接部和所述第二连接部互成角度，所述第一连接部与所述第二连接体相对，所述通孔由所述第一连接部延伸至所述第二连接部。
在本申请的一些实施例中，所述弯折部为弧形。
在本申请的一些实施例中，所述第二连接体与所述第二连接部垂直。
在本申请的一些实施例中，所述第一连接部与所述第二连接部所形成的的夹角为钝角。
根据本申请实施例的电池箱，包括箱体，具有内部空腔；上述的固定结构，所述固定结构固定于所述箱体的外壁。
在本申请的一些实施例中，所述箱体和所述固定结构为一体件。
根据本申请实施例的电池包，包括上述电池箱。
在以上实现过程中，本申请实施例提供的固定结构具有适当的结构强度，因此，设置有该固定结构的电池箱更易于被牢固地限位，从而有利于确保存放于电池箱中的电池稳定性，避免电池随同电池箱的搬运过程中的缓动，也利于将其与用电设备/供电设备 牢固结合。
附图说明
为了更清楚地说明本申请实施例的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，应当理解，以下附图仅示出了本申请的某些实施例，因此不应被看作是对范围的限定，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他相关的附图。
图1为本申请示例中的箱体的结构示意图；
图2示出了本申请示例中的固定结构与图1箱体配合的结构示意图；
图3示出了图2的E部的局部放大的结构示意图；
图4示出了本申请实施例中的固定结构在第一视角的结构示意图；
图5示出了本申请实施例中的固定结构在第二视角的结构示意图；
图6示出了本申请实施例中的固定结构在第三视角的结构示意图；
图7示出了一种固定器与箱体配合的结构示意图。
图标：100-箱体；101-内部空腔；102-外壁；200-电池箱；201-悬挂件；202-螺栓连接件；300-固定结构；301-第一连接体；302-第二连接体；303-过渡体；3031-连接孔；3032-螺纹；3033-通孔；401-第一连接部；402-弯折部；403-第二连接部；501-第一孔段；502-第二孔段；601-第一部分；602-第二部分。
具体实施方式
电动汽车通常使用动力电池作为动力来源，并且使用的一般是多个单体电池组合形成的电池包。而为了将电池包固定，将电池包放置于电池箱中，然后将电池箱安装在车体内。
由于汽车经常处于高速运动中，并且还会快速启停，从而会使电池箱承受极大的瞬间作用力。因此，电池箱相对汽车稳定，以确保电池包的稳定是很有必要的。此外，在安装电池包的过程中，可能也需要经常地移动(如吊起等)电池箱，因此，也有必要保持其移动过程中平稳运动。
一般地，箱体大致扁平的长方体结构，其内部具有空间/内部空腔用以储放电池。为了对其进行吊装、固定，目前多通过在其外壁焊接各种适当的结构件，再通过结构件对箱体进行操作。但是，这些结构件的结构强度低，容易损坏，尤其是在多次搬运后更 容易造成损坏。
针对于此，本申请实例中提供了一种固定结构300，参阅图4至图6。相比于现有的设置用于固定的结构件和用于吊装的结构件两个结构件而言，是一种整体式结构，固定结构300与箱体100可以形成多个结合位点、强度更高。
此外，由于存在前述的焊接操作，因此，箱体100存在被焊接操作的高温烧穿的风险，且焊接产生的热量会影响箱体100的尺寸形状。同时，焊接操作的难度较高，不变操作，导致产品的成品率偏低、制作周期较长。有鉴于此，结合本申请实例中所提出的固定结构300，其与箱体100一体成型(如挤出成型)为一体件。因此，可以免于对箱体100进行焊接，从而克服对箱体100的影响和损伤。
应当指出的是，虽然焊接操作可能导致对箱体100的伤害，因此，示例中选择将固定结构300与箱体100一体成型。但是，这并非意味着，本申请实例中的固定结构300只能通过一体成型的方式与箱体100结构。在不考虑焊接操作所带来的不利影响或者由于材料的选择和工艺的调整使焊接操作不会带来不利影响或所带来的影响相比于焊接操作所带来的优势可以忽略的情况下，该固定结构300也可以选择与箱体100焊接连接。
为了便于本申请示例方案中的固定结构300的理解，以下就示例中与之配合的箱体100的结构进行简述。
图1给出了一种箱体100的结构示意图。如图1所示，箱体100大体上呈扁平的长方体结构。其具有底壁、围壁(包括前壁板、后壁板、左壁板和右壁板)以及顶壁(图未予以绘示)，箱体100由底壁、前壁板、后壁板、左壁板和右壁板和底壁共同围合，箱体100的内部形成用以容纳电池的内部空腔101。基于固定电池的需要，箱体100的内壁可以设置各种适当的固定结构如槽、孔、凸起物等等。另外，为方便走线、电缆排布，箱体内还可以根据设计所需设置孔洞等结构。
本申请中的固定结构300用于电池包，电池包包括上述箱体100，固定结构300设置在箱体100的外壁102，可以是底壁、或者也可以是围壁和顶壁。本申请实施例中的固定结构300设置在箱体100中的围壁的外表面，即外壁102的与围壁对应的部分上。需要指出的是，虽然，本申请中该固定结构300是基于电池包的箱体100进行说明和展示，但是，这并非意在限制该固定结构300只能应用电池包的箱体100。基于本申请示例中所阐明的固定结构300及其应用方式，应当理解，其也可以应用于其他领域，而非限制于电池领域。在其他具有固定、搬运、挪动需求的领域中，该固定结构300仍然能够具有相应的应用。并且针对不同的应用场景，可以对其进行适当的修改，例如，尺寸规格、制作材料、制作方法等等。例如，可以将该固定结构300应用于电脑的主板安装、 显卡安装、硬盘安装等等。
图2给出了基于图1的箱体100与本申请实例中的固定结构300配合形成的电池箱200的结构示意图。图2中公开了三个固定结构300设置于箱体100的外壁102结构。该三个固定结构300沿箱体100的外壁102间隔地布置，从而大致上遍及所设置的外壁102。且三个固定结构300也有利于对箱体100施加更均匀的作用力，避免因局部作用力太大导致损坏的隐患发生。
另外，在位于两端的两个固定结构300之间的固定结构300上，对应地还设置由上下两个结构件，例如位于上部的悬挂件201以及位于下部的螺栓连接件202，参阅图2和图3。根据不同的情况，固定件可以对应选择设置不同的结构件，以便将其与其他部件进行连接和相对限位。例如，除了上述的悬挂件201以及螺栓连接件202之外，也可以设置销轴、轴承座等。
以下将结合附图(图4、图5以及图6)，对本申请中的固定结构300进行详述。
图4至图6分别从不同的视角展示了固定结构300，从整体而言，固定结构300的外型呈大致的“U”字型结构，或者，也可以认为是大致的“C”字型结构。因此，从结构外型而言，其大体上具有一个开口，并且以此开口侧与上述的箱体100结合/连接。
本申请中的固定结构300为一体式结构，因此，并无在实质上未彼此连接的部分。例如，在图2中，三个固定结构300分别彼此间隔地布置在箱体100，即可认为三个固定结构300之间并未彼此连接。为了更清楚地展示，具有实质上未彼此连接的部分的非一体式结构，可以参阅图7。图7表示一种分体式固定用装置与箱体100(仅绘出了部分)的外壁102配合关系。该装置包括第一部分601和第二部分602，且该两部分彼此独立，而该两部分并未连接。因此，该装置也可以认为是一种包含彼此独立的部件的分体式的固定器。
有别于图7所示的分体式的固定器，如图4至图6中的本申请示例的固定结构300，由于采用了一体式结构，因此，其结构上强度相对更高，从而能够承受更大的作用力。另外，由于本申请中的固定结构300与箱体100形成至少两处相互联系的连接位置，因此，相比于图7中的两部分所具有的相互独立的两个连接位置，本申请的固定结构300与箱体100之间的连接更牢固。
参阅图4，整体上，固定结构300主要包括三部分，分别为第一连接体301、过渡体303以及第二连接体302，且三者依次连接。可以理解的是，第一连接体301的一端连接于箱体100，第一连接体301和第二连接体302还是大致相对布置的，第二连接体302的一端连接于箱体100，第二连接体302和第一连接体301间隔开，过渡体303的 两端分别与第一连接体301的远离箱体100的一端和第二连接体302的远离箱体100的一端连接。固定结构300分别通过第一连接体301和第二连接体302分别连接于箱体100的不同部位，即第一连接体301结合于箱体100的第一位置；第二连接体302结合于箱体100的第二位置，并且，该第一位置和第二位置是相互邻近。示例图中，固定结构300为弯曲的板状，其具有相对较大的长度和相对较小的厚度。因此，例如，其可以被认为是用平面板通过适当的弯曲而构成。在实际的制作生产中，其可以与箱体100一并通过注塑、挤塑等方式而制作。
该固定结构300还具有设置于第二连接体302的多个连接孔3031，例如至少是两个。由此便于电池包的安装。进一步地，多个连接孔3031中存在至少一个连接孔3031具有螺纹；和\或，多个连接孔3031中存在至少一个连接孔3031为光滑孔。例如，设置于第二连接体302的连接孔3031中，至少有两个不同用途的孔。例如，其中一个连接孔3031设置有螺纹3032，由此，具有螺纹3032的连接孔3031可以通过螺栓、螺柱等与其它结构连接，全部的连接孔3031中。同时，其中有一个无螺纹为光滑孔，因此，当箱体100与其它结构连接时，可以对应在前述的其他结构对应设置一个有螺纹的孔，一个无螺纹的孔。因此，箱体100和所述的“其他结构”连接时，螺栓可以从正面或反面进行连接。其中，正面连接例如是螺栓穿过第二连接体302的无螺纹孔，而其它结构上的有螺纹孔进行螺纹连接。相应地，反面连接例如是螺栓穿过其他结构的无螺纹孔，而与第二连接体302上的有螺纹孔进行螺纹连接。
设置于第二连接体302上的具有螺纹3032的连接孔3031，可以通过在连接孔3031的内壁制作螺纹而实施，或者通过在该连接孔3031内安装或固定一个螺帽/螺母。螺帽可以是下沉埋设在连接孔3031中，或者部分埋设在连接孔3031中同时一部分从连接孔3031中露出。
对应于此，基于方便操作的考量，过渡体303贯穿设置有由内侧表面至外侧表面延伸的通孔3033，即通孔3033沿过渡体303的厚度方向贯穿设置。该通孔3033既可以用以与悬挂件201配合，也可以用以作为螺栓连接件202与第二连接体302配合的连接孔3031所经过的通道，便于通过其他结构件与固定结构300进行配合，从而使配置固定结构300的电池箱可以被更牢固地限位，参阅图2和图3，同时还可以在一定程度减轻固定结构300的质量。
进一步地，通孔3033的部分在第一连接体301至第二连接体302的方向上与第二连接体302相对。由此便于螺栓连接件202穿过通孔3033与连接孔3031配合。更进一步地，连接孔3031包括光滑孔，通孔3033与光滑孔相对。与光滑孔配合的螺栓连接件 202需要穿过该光滑孔与其他结构上的螺纹孔或螺母配合，因此需要较大的空间供螺栓连接件202穿设在光滑孔内，通孔3033与光滑孔相对，可以给螺栓连接件202提供安装空间。
在本申请的一些实施例中，如图4-图6所示，通孔3033包括依次连接的第一孔段501和第二孔段502，第一孔段501位于第二孔段502的靠近第一连接体301的一侧，第二孔段502的宽度大于第一孔段501的宽度。因此，通孔3033大致为“T”字型结构。悬挂件201(同样为T字形结构)可以从第二孔段502处插入到通孔3033内，然后再于第一孔段501处被限位卡住。
具体的，过渡体303包括依次连接的第一连接部401、弯折部402以及第二连接部403，其中，第一连接部401的远离弯折部402的一端与第一连接体301的远离箱体100的一端连接，第二连接部403的远离弯折部402的一端与第二连接体302的远离箱体100的一端连接，第一连接部401和第二连接部403互成角度，第一连接部401与第二连接体302相对，通孔3033既可以设置在过渡体303的第一连接部401，也可以设置在过渡体303的第二连接部403，根据不同连接方式要求进行选择。
在一些示例中，通孔3033由第一连接部401经过弯折部402延伸至第二连接部403。因此，通孔3033设置在整个过渡体303的大部分区域，可以提供更大的活动空间，从而有利于如前述的其他结构件与之配合，并且能够在固定结构300上同时进行悬挂件201以及螺栓连接件202的布置，同时还可以在一定程度减轻固定结构300的质量。进一步地，还可以对通孔3033的构成形式进行调整。例如示例中选择配置通孔3033具有位于第一连接部401和过渡部402的第一孔段501以及位于第二连接部403的第二孔段502，并且第一孔段501的宽度小于第二孔段502的宽度，其可以与其它结构件形成卡接结构，提高使用的便利性。
另外，由于固定结构300的第二连接体302设置连接孔3031，因此，在设置上述的通孔3033时，可以考虑连接孔3031的使用方式而对应调整通孔3033的位置。例如，参阅图2，连接孔3031具有两个，且一个为无螺纹的孔(第一孔)，另一个为有螺纹3032的孔(第二孔)。其中第一孔可以正对前述的通孔3033，以便于螺栓连接件202穿过，而插入到该第一孔中。同时，由于第二孔是供螺栓从其他结构(如安装电池箱200的车架)插入，并进行螺纹连接，因此，固定结构300的与第二孔对应的位置，可以不用开设前述通孔3033。或者说，通孔3033可以不与第二孔相对。
固定结构300的过渡体303可以是平直的，也可以是弯折状的。本申请实例中选择为弯折状。当固定结构300的过渡体303选择为平直状时，为了预留操作空间，可能需 要额外地增加第一连接体301和第二连接体302的结构尺寸，例如相对于箱体100的外壁102的长度。相比于平直的形状，折弯形状的过渡体303能够提高固定结构300的结构强度、增强固定结构的抗冲击性。
弯折的过渡体303可以在制作时根据第一连接体301和第二连接体302的连接方式和位置而相对合理地调整其具体的最终结构和形态，因此，有利于释放内部应力，提高其抗疲劳性能。例如，过渡体303包括依次连接的第一连接部401、弯折部402以及第二连接部403。其中，第一连接部401与第一连接体301连接，第二连接部403与第二连接体302连接，第一连接部401和第二连接部403互成角度。
相应地，过渡体303的弯折方式，也可以对应通过控制弯折部402的形状，改变两个端部相对于弯折部402的位置而进行选择性的控制。
因此，在制作固定结构300时，过渡体303的第一连接部401和第二连接部403的布局方式可以进行适当的考量和调整。一些实例中，过渡体303是以弧形方式弯折的，即弯折部402为弧形，相应地，该过渡体303的弧形区域位于过渡体303的弯折部402。由此，可以提高表面的过渡平滑性，改善第一连接部和第二连接部之间的过渡平滑性，同时也能够在一定程度上避免局部的应力多大问题，可以提高弯折部的寿命。
对于过渡体303的弯折方式，可以通过对其第一连接部401和第二连接部403的排列方式进行说明，例如，第二连接体302与第二连接部403呈纵横交错布置，即第二连接体302与第二连接部403垂直。由此，能够提供固定结构300的安装便利性。以图2所示，第二连接体302大致上是在水平方向延伸，而第二连接部403则大致上是在竖直方向延伸，即两者大致呈直角A排布。同时，第一连接体301可以倾斜向上布置，而第一连接部401倾斜向下，两者之间大致可以呈锐角B排布，第一连接部401和第二连接部403的夹角C为钝角，如图4所示，结合弧形的弯折部402，可以进一步改善其表面的平滑性。
通过对过渡体303的第一连接部401、弯折部402以及第二连接部403之间的分布的控制，可以使其表面过渡更加平滑、自然，从而可以减少内部的应力过度集中，从而使其更不易损坏。另外，通过上述对过渡体303结构的控制，还可以改变其使用方式。例如，第一连接体301和第一连接部401是呈倾斜状布置，因此，其可以被用以作为其他结构悬挂的基础；第二连接体302和第二连接部403呈纵横交错布置，因此，其可以用以通过螺栓等紧固件进行固定。
以上所述仅为本申请的优选实施例而已，并不用于限制本申请，对于本领域的技术人员来说，本申请可以有各种更改和变化。凡在本申请的精神和原则之内，所作的任何 修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (15)

  1. 一种固定结构，其特征在于，所述固定结构用于电池包，所述电池包包括箱体，所述固定结构设于所述箱体的外壁，所述固定结构包括：
    第一连接体，所述第一连接体的一端连接于所述箱体；
    第二连接体，所述第二连接体的一端连接于所述箱体，所述第二连接体与所述第一连接体间隔开；
    过渡体，所述过渡体的两端分别与所述第一连接体的远离所述箱体的一端和所述第二连接体的远离所述箱体的一端连接。
  2. 根据权利要求1所述的固定结构，其特征在于，所述固定结构为一体件。
  3. 根据权利要求1所述的固定结构，其特征在于，所述第二连接体上具有多个连接孔。
  4. 根据权利要求3所述的固定结构，其特征在于，多个所述连接孔中存在至少一个所述连接孔具有螺纹；
    和\或，多个所述连接孔中存在至少一个所述连接孔为光滑孔。
  5. 根据权利要求3所述的固定结构，其特征在于，所述过渡体具有通孔。
  6. 根据权利要求5所述的固定结构，其特征在于，所述通孔的部分在所述第一连接体至所述第二连接体的方向上与所述第二连接体相对。
  7. 根据权利要求6所述的固定结构，其特征在于，所述连接孔包括光滑孔，所述通孔与所述光滑孔相对。
  8. 根据权利要求6所述的固定结构，其特征在于，所述通孔包括依次连接的第一孔段和第二孔段，所述第一孔段位于所述第二孔段的靠近所述第一连接体的一侧，所述第二孔段的宽度大于所述第一孔段的宽度。
  9. 根据权利要求8所述的固定结构，其特征在于，所述过渡体包括依次连接的第一连接部、弯折部以及第二连接部，其中，所述第一连接部的远离所述弯折部的一端与所述第一连接体的远离所述箱体的一端连接，所述第二连接部的远离所述弯折部的一端与所述第二连接体的远离所述箱体的一端连接，所述第一连接部和所述第二连接部互成角度，所述第一连接部与所述第二连接体相对，所述通孔由所述第一连接部延伸至所述第二连接部。
  10. 根据权利要求9所述的固定结构，其特征在于，所述弯折部为弧形。
  11. 根据权利要求9所述的固定结构，其特征在于，所述第二连接体与所述第二连接部垂直。
  12. 根据权利要求9所述的固定结构，其特征在于，所述第一连接部与所述第二连接部所形成的的夹角为钝角。
  13. 一种电池箱，其特征在于，包括：
    箱体，具有内部空腔；
    根据权利要求1至12中任意一项所述的固定结构，所述固定结构固定于所述箱体的外壁。
  14. 根据权利要求13所述的电池箱，其特征在于，所述箱体和所述固定结构为一体件。
  15. 一种电池包，其特征在于，包括根据权利要求13或14所述的电池箱。
PCT/CN2021/108225 2020-07-24 2021-07-23 固定结构、电池箱和电池包 Ceased WO2022017513A1 (zh)

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