CN110712359B - Battery shell, forming method thereof and stamping device - Google Patents

Battery shell, forming method thereof and stamping device Download PDF

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Publication number
CN110712359B
CN110712359B CN201911147399.5A CN201911147399A CN110712359B CN 110712359 B CN110712359 B CN 110712359B CN 201911147399 A CN201911147399 A CN 201911147399A CN 110712359 B CN110712359 B CN 110712359B
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Prior art keywords
punching
groove
area
pit
processed
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CN110712359A (en
Inventor
金虎权
李根雨
朴镇奎
周滢杰
孙威
曹启飞
郭恒志
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Hengyang Gaopai New Energy Technology Co ltd
Hunan Lingpai Energy Storage Technology Co ltd
Hunan Lingpai Lithium Energy Co ltd
Hunan Lingpai New Energy Research Institute Co ltd
Hunan Lingpai Technology Group Co ltd
Original Assignee
Hunan Lingpai Energy Storage Technology Co ltd
Hunan Lingpai New Energy Research Institute Co ltd
Hunan Lingpai New Energy Technology Co Ltd
Hengyang Lingpai New Energy Technology Co Ltd
Hunan Lead Power Dazhi Technology Inc
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/26Component parts, details or accessories; Auxiliary operations
    • B29C51/30Moulds
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/26Component parts, details or accessories; Auxiliary operations
    • B29C51/42Heating or cooling
    • B29C51/421Heating or cooling of preforms, specially adapted for thermoforming
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/26Component parts, details or accessories; Auxiliary operations
    • B29C51/46Measuring, controlling or regulating
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

The present disclosure relates to battery technology, and particularly to a battery case, a method for forming the battery case, and a stamping device for forming the battery case. The shell is formed by a diaphragm to be processed through sectional punching, and is provided with a preset processing area which is sequentially defined as a peripheral blank pressing area, a middle pressing area and a punching contact area from outside to inside; the sectional type punching pit comprises a first section of punching pit and a second section of punching pit, wherein the first section of punching pit is used for compacting the peripheral edge pressing area, and the punching contact area is punched to form a groove with a first preset depth; and the second section of punching pit is used for continuously punching the punching contact area and gradually compacting the middle compacting area to form a target groove. Four bight thickness of casing that obtain through the multistage towards hole of this application are thicker to can avoid towards the fish scale pattern that the hole in-process produced, fold scheduling problem, make the shells inner wall after the shaping level and smooth.

Description

电池壳体及其成型方法、冲压装置Battery case, forming method and stamping device thereof

技术领域Technical field

本申请涉及电池领域,特别涉及一种电池壳体及其成型方法、用于电池壳体成型的冲压装置。The present application relates to the field of batteries, and in particular to a battery case and a forming method thereof, and a stamping device for forming the battery case.

背景技术Background technique

随着电动汽车的快速发展,对锂离子电池的能量密度的要求越来越高。这促使锂离子动力电池向高体积、高质量密度的方向发展。铝塑膜作为软包电池的核心材料,对电池的性能具有至关重要的作用。铝塑膜一般采用冲坑成型的方法,随着锂离子电池技术的发展趋势,对铝塑膜冲坑质量的要求越来越高,不但要求更大尺寸的冲坑深度,而且要求冲坑过程中对铝塑膜的损伤要非常小。With the rapid development of electric vehicles, the requirements for the energy density of lithium-ion batteries are getting higher and higher. This has prompted the development of lithium-ion power batteries in the direction of high volume, high quality and density. As the core material of soft-pack batteries, aluminum-plastic film plays a vital role in battery performance. Aluminum-plastic films generally adopt the method of punching and forming. With the development trend of lithium-ion battery technology, the requirements for the quality of punching aluminum-plastic films are getting higher and higher. Not only does it require a larger punching depth, but also requires a punching process. The damage to the aluminum-plastic film should be very small.

目前,铝塑膜冲坑主要是通过冲压机带动冲坑模具运动来实现。首先通过压料机构将铝塑膜固定,然后通过凸凹模配合冲坑成形,使铝塑膜的四周产生延伸,形成一定深度的的凹坑形结构,在冲坑成形过程中,被压料机构定位的部分不能参加成型的形变,只有模具冲头部位接触的部分延伸成形,成形部分厚度不均一,极易破裂。铝塑膜冲深深度以及冲坑角部铝层厚度称为限制铝塑膜使用的瓶颈。At present, aluminum-plastic film punching is mainly achieved by using a punching machine to drive the punching mold movement. First, the aluminum-plastic film is fixed by a pressing mechanism, and then the convex and concave molds are used to cooperate with the punching and forming process, so that the surroundings of the aluminum-plastic film are extended to form a pit-shaped structure with a certain depth. During the punching and forming process, the pressing mechanism The positioned part cannot participate in the deformation of the molding. Only the part in contact with the die punch part extends and forms. The thickness of the formed part is uneven and it is easy to break. The punching depth of aluminum-plastic film and the thickness of the aluminum layer at the corners of the punched pit are called bottlenecks that limit the use of aluminum-plastic film.

发明内容Contents of the invention

本申请要解决的是现有铝塑膜冲坑成型冲深深度以及冲坑角部铝层厚度低的技术问题。This application aims to solve the technical problems of the existing aluminum-plastic film punching depth and the low thickness of the aluminum layer at the corners of the punching pit.

为解决上述技术问题,第一方面,本申请公开了一种电池壳体,所述壳体由一待加工膜片经分段式冲坑成型,所述壳体具有至少一个目标凹槽,每个所述目标凹槽分别对应有所述待加工膜片的预设加工区域,所述预设加工区域由外向内依次定义为外围压边区域、中间压紧区域和冲压接触区域;In order to solve the above technical problems, in the first aspect, the present application discloses a battery case. The case is formed by segmented punching from a diaphragm to be processed. The case has at least one target groove, each of which has at least one target groove. Each of the target grooves corresponds to a preset processing area of the diaphragm to be processed, and the preset processing area is defined from outside to inside as a peripheral edge pressing area, a middle pressing area and a stamping contact area;

所述分段式冲坑包括第一段冲坑和第二段冲坑,其中,所述第一段冲坑为压紧所述外围压边区域,并冲压所述冲压接触区域形成具有第一预设深度的凹槽;所述第二段冲坑为继续冲压所述冲压接触区域,并同时逐渐压紧所述中间压紧区域形成所述目标凹槽。The segmented punching pit includes a first punching pit and a second punching pit, wherein the first punching pit is to compress the peripheral edge blanking area and punch the punching contact area to form a first punching pit. A groove with a preset depth; the second punching pit is to continue punching the punching contact area, and at the same time gradually compress the intermediate pressing area to form the target groove.

进一步的,所述待加工膜片进行所述分段式冲坑之前具有预设温度。Furthermore, the membrane to be processed has a preset temperature before the segmented punching.

进一步的,所述预设温度为30℃-60℃。Further, the preset temperature is 30°C-60°C.

进一步的,所述第一预设深度为所述目标凹槽深度的0.25-0.35倍。Further, the first preset depth is 0.25-0.35 times of the target groove depth.

进一步的,所述目标凹槽为圆形槽或多边形槽,所述目标凹槽的底部边缘具有圆角。Further, the target groove is a circular groove or a polygonal groove, and the bottom edge of the target groove has rounded corners.

第二方面,本申请公开了一种电池壳体,所述壳体由一待加工膜片经分段式冲坑成型,所述壳体具有至少一个目标凹槽,每个所述目标凹槽分别对应有所述待加工膜片的预设加工区域,所述预设加工区域由外向内依次定义为外围压边区域、中间压紧区域和冲压接触区域;In a second aspect, the present application discloses a battery case. The case is formed by segmented punching from a diaphragm to be processed. The case has at least one target groove, each of the target grooves. Each corresponds to a preset processing area of the diaphragm to be processed, and the preset processing area is defined from outside to inside as a peripheral edge pressing area, a middle pressing area and a stamping contact area;

所述分段式冲坑包括第一段冲坑、第二段冲坑和第三段冲坑,其中,所述第一段冲坑为压紧所述外围压边区域,并冲压所述冲压接触区域形成具有第一预设深度的凹槽;所述第二段冲坑为继续冲压所述冲压接触区域,并同时逐渐压紧所述中间压紧区域形成第二预设深度的凹槽;所述第三段冲坑为继续冲压所述冲压接触区域形成所述目标凹槽。The segmented punching pit includes a first-stage punching pit, a second-stage punching pit and a third-stage punching pit, wherein the first-stage punching pit is for pressing the peripheral edge pressing area and punching the punching contact area to form a groove with a first preset depth; the second-stage punching pit is for continuing to punch the punching contact area and gradually pressing the middle pressing area to form a groove of a second preset depth; the third-stage punching pit is for continuing to punch the punching contact area to form the target groove.

进一步的,所述待加工膜片进行所述分段式冲坑之前具有预设温度。Further, the diaphragm to be processed has a preset temperature before undergoing the segmented punching.

进一步的,所述预设温度为30℃-60℃。Further, the preset temperature is 30°C-60°C.

进一步的,所述第一预设深度为所述目标凹槽深度的0.25-0.35倍;和/或,所述第二预设深度为所述目标凹槽深度的0.9-0.95倍。Further, the first preset depth is 0.25-0.35 times the target groove depth; and/or the second preset depth is 0.9-0.95 times the target groove depth.

进一步的,所述目标凹槽为圆形槽或多边形槽,所述目标凹槽的底部边缘具有圆角。Furthermore, the target groove is a circular groove or a polygonal groove, and the bottom edge of the target groove has a rounded corner.

第三方面,本申请公开了一种电池壳体成型方法,包括:In a third aspect, this application discloses a battery case forming method, including:

对待加工膜片进行第一段冲坑,其中,所述待加工膜片具有预设加工区域,所述预设加工区域由外向内依次定义为外围压边区域、中间压紧区域和冲压接触区域,所述第一段冲坑为压紧外围压边区域,并冲压所述冲压接触区域形成具有第一预设深度的凹槽;The diaphragm to be processed is punched in the first stage, wherein the diaphragm to be processed has a preset processing area, and the preset processing area is defined from outside to inside as a peripheral edge pressing area, a middle pressing area and a stamping contact area. , the first punching pit is to press the peripheral edge area, and punch the punching contact area to form a groove with a first preset depth;

对待加工膜片进行第二段冲坑,所述第二段冲坑为继续冲压所述冲压接触区域,并逐渐压紧中间压紧区域形成具有第二预设深度的凹槽或目标凹槽。A second stage of punching is performed on the diaphragm to be processed. The second stage of punching is to continue punching the punching contact area and gradually compress the intermediate pressing area to form a groove or target groove with a second preset depth.

进一步的,当所述第二段冲坑为形成具有所述第二预设深度的凹槽时,所述成型方法还包括:对待加工膜片进行第三段冲坑,所述第三段冲坑为继续冲压所述冲压接触区域形成目标凹槽。Furthermore, when the second stage of punching is to form a groove having the second preset depth, the forming method further comprises: performing a third stage of punching on the membrane to be processed, wherein the third stage of punching is to continue punching the punching contact area to form a target groove.

进一步的,所述第一预设深度为所述目标凹槽深度的0.25-0.35倍。Further, the first preset depth is 0.25-0.35 times of the target groove depth.

进一步的,所述目标凹槽为圆形槽或多边形槽,所述目标凹槽的底部边缘具有圆角。Further, the target groove is a circular groove or a polygonal groove, and the bottom edge of the target groove has rounded corners.

进一步的,所述对待加工膜片进行第一段冲坑之前还包括:将所述待加工膜片经过温度调节装置达到预设温度。Further, before performing the first stage of punching the diaphragm to be processed, the step further includes: passing the diaphragm to be processed through a temperature adjustment device to reach a preset temperature.

进一步的,所述温度调节装置采用的加热方式为辐射加热或接触式加热。Furthermore, the heating method adopted by the temperature adjustment device is radiation heating or contact heating.

进一步的,所述预设温度为30℃-60℃。Further, the preset temperature is 30°C-60°C.

进一步的,所述温度调节装置采用的加热方式为辐射加热,所述待加工膜片与所述温度调节装置之间的距离为50mm-200mm。Furthermore, the heating method adopted by the temperature adjustment device is radiant heating, and the distance between the diaphragm to be processed and the temperature adjustment device is 50mm-200mm.

第四方面,本申请公开了一种用于电池壳体成型的冲压装置,包括:In a fourth aspect, the present application discloses a punching device for forming a battery housing, comprising:

冲坑凸模;Punching punch;

下凹模板,所述下凹模板上设有凹陷,所述凹陷的轮廓为规则形状或不规则形状,所述凹陷与所述冲坑凸模相匹配;A concave template, the concave template is provided with a depression, the outline of the depression is a regular shape or an irregular shape, and the depression matches the punching punch;

第一压紧模板,所述第一压紧模板设置在所述下凹模板的上部,用于压紧待加工膜片的外围压边区域;A first compression template, the first compression template is arranged on the upper part of the concave template and is used to compress the peripheral edge pressing area of the diaphragm to be processed;

第二压紧模板,所述第二压紧模板设置在所述第一压紧模板的上部,用于压紧待加工膜片的中间压紧区域。The second pressing template is arranged on the upper part of the first pressing template and is used to compress the middle pressing area of the diaphragm to be processed.

进一步的,所述冲压装置还包括驱动电机,所述第二压紧模板与驱动电机连接,所述驱动电机用于驱动所述第二压紧模板的升降。Further, the stamping device further includes a driving motor, the second pressing template is connected to the driving motor, and the driving motor is used to drive the lifting and lowering of the second pressing template.

采用上述技术方案,本申请所述的电池壳体及其成型方法、用于电池壳体成型的冲压装置具有如下有益效果:Adopting the above technical solution, the battery case, its forming method, and the stamping device for forming the battery case described in this application have the following beneficial effects:

本申请实施例所述的电池壳体,通过多段冲坑成型,第一段冲坑过程中仅压紧外围压边区域,中间压紧区域和冲压接触区域为未压紧区,此时未压紧部位面积大,冲坑部分厚度与未压紧部位充分分担张力,使未压紧部分与冲坑四个角部厚度均匀。第二段冲坑过程会逐渐压紧中间压紧区域,冲坑完毕后壳体整体厚度差异不大,较以往成型方法冲坑四个角部厚度更厚,并可以很好的避免冲坑过程中产生的鱼鳞纹,褶皱等问题,使成型后的壳体内壁平整光滑。The battery case described in the embodiment of the present application is formed through multi-stage punching. In the first stage of punching, only the peripheral edge pressing area is pressed. The middle pressing area and the punching contact area are unpressed areas. At this time, there is no pressing. The area of the tight part is large, and the thickness of the punched pit part fully shares the tension with the un-pressed part, so that the thickness of the un-pressed part and the four corners of the punched pit is even. The second stage of the punching process will gradually compress the middle compression area. After the punching is completed, the overall thickness of the shell is not much different. Compared with the previous molding method, the thickness of the four corners of the punching hole is thicker, and the punching process can be well avoided. The fish scales, wrinkles and other problems caused by the molding are eliminated to make the inner wall of the molded shell smooth and smooth.

附图说明BRIEF DESCRIPTION OF THE DRAWINGS

为了更清楚地说明本申请实施例中的技术方案,下面将对实施例描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本申请的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without exerting creative efforts.

图1为本申请一个实施例的电池壳体成型示意图;FIG1 is a schematic diagram of a battery housing molding according to an embodiment of the present application;

图2为本申请一个实施例的电池壳体成型示意图;Figure 2 is a schematic diagram of the battery case molding according to one embodiment of the present application;

图3为本申请一个实施例的电池壳体冲坑过程示意图;FIG3 is a schematic diagram of a battery housing punching process according to an embodiment of the present application;

图4为本申请一个实施例的电池壳体冲坑过程示意图;FIG4 is a schematic diagram of a battery housing punching process according to an embodiment of the present application;

图5为本申请一个实施例的待加工膜片加热的示意图;Figure 5 is a schematic diagram of heating the film to be processed according to an embodiment of the present application;

图6为本申请另一个实施例的冲压装置的结构示意图。Figure 6 is a schematic structural diagram of a stamping device according to another embodiment of the present application.

以下对附图作补充说明:The following is a supplementary explanation of the accompanying drawings:

11-冲坑凸模;12-下凹模板;13-第一压紧模板;14-第二压紧模板;15-驱动电机;20-温度调节装置;30-待加工膜片。11-punch punch; 12-concave template; 13-first pressing template; 14-second pressing template; 15-driving motor; 20-temperature adjustment device; 30-diaphragm to be processed.

具体实施方式Detailed ways

下面将结合本申请实施例中的附图,对本申请实施例中的技术方案进行清楚、完整地描述。显然,所描述的实施例仅仅是本申请一部分实施例,而不是全部的实施例。基于本申请中的实施例,本领域普通技术人员在没有作出创造性劳动的前提下所获得的所有其他实施例,都属于本申请保护的范围。The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of this application.

在本申请的描述中,需要理解的是,术语“上”、“下”、“顶”、“底”等指示的方位或位置关系为基于附图所示的方位或位置关系,仅是为了便于描述本申请和简化描述,而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作,因此不能理解为对本申请的限制。此外,术语“第一”、“第二”仅用于描述目的,而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此,限定有“第一”、“第二”的特征可以明示或者隐含的包括一个或者更多个该特征。而且,术语“第一”、“第二”等是用于区别类似的对象,而不必用于描述特定的顺序或先后次序。应该理解这样使用的数据在适当情况下可以互换,以便这里描述的本申请的实施例能够以除了在这里图示或描述的那些以外的顺序实施。In the description of this application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "top", "bottom", etc. are based on the orientation or positional relationship shown in the drawings and are only for the purpose of To facilitate the description of the present application and to simplify the description, it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present application. In addition, the terms “first” and “second” are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Therefore, features defined as “first” and “second” may explicitly or implicitly include one or more of these features. Furthermore, the terms "first", "second", etc. are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances so that the embodiments of the application described herein can be practiced in sequences other than those illustrated or described herein.

为解决现有的铝塑膜冲坑成型厚度不均,成型后角部铝层薄,且极易破裂。本申请公开了一种电池壳体,如图1所示,壳体由一待加工膜片30经分段式冲坑成型,壳体具有至少一个目标凹槽,每个目标凹槽分别对应有待加工膜片30的预设加工区域,预设加工区域由外向内依次定义为外围压边区域、中间压紧区域和冲压接触区域;分段式冲坑包括第一段冲坑和第二段冲坑,其中,第一段冲坑为压紧外围压边区域,并冲压上述冲压接触区域形成具有第一预设深度的凹槽;第二段冲坑为继续冲压上述冲压接触区域,并同时逐渐压紧中间压紧区域形成目标凹槽。In order to solve the problem of uneven thickness of existing aluminum-plastic film punching and pit forming, the aluminum layer at the corners after forming is thin and easily broken. This application discloses a battery case. As shown in Figure 1, the case is formed by segmented punching of a diaphragm 30 to be processed. The case has at least one target groove, and each target groove corresponds to the target groove to be processed. The preset processing area for processing the diaphragm 30 is defined from the outside to the inside as the peripheral edge pressing area, the middle pressing area and the punching contact area; the segmented punching pit includes the first punching pit and the second punching zone. The first section of the punching pit is to press the peripheral edge area and punch the above-mentioned stamping contact area to form a groove with a first preset depth; the second section of the punching pit is to continue to punch the above-mentioned stamping contact area, and at the same time gradually Press the middle pressing area to form the target groove.

本申请实施例所述的电池壳体,经过两段冲坑成型,第一段冲坑过程中,仅压紧外围压边区域,中间压紧区域和冲压接触区域为未压紧区,此时未压紧部位面积大,冲坑部分厚度与未压紧部位充分分担张力,使未压紧部分与冲坑四个角部厚度均匀。第二段冲坑过程会逐渐压紧中间压紧区域,直至第二段冲坑完成。可选的,在压紧中间压紧区域过程中,压力随冲坑深度呈线性变化,也可以为非线性变化。在一些实施例中,压紧中间压紧区域的方法还可以为从外围压边区域逐渐向内压紧中间压紧区域。由于第二段冲坑过程中为逐渐压紧中间压紧区域,故冲坑完毕后整体厚度差异不大,较以往成型方法冲坑四个角部厚度更厚,并可以很好的避免冲坑过程中产生的鱼鳞纹,褶皱等问题,使成型后的壳体内壁平整光滑。可选的,电池壳体的材质为铝塑膜、高强度钢、镁合金、铝合金、高性能塑料或碳纤维复合材料等。The battery case described in the embodiment of this application is formed through two stages of punching. During the first stage of punching, only the peripheral edge pressing area is pressed, and the middle pressing area and the stamping contact area are unpressed areas. At this time, The area of the uncompressed part is large, and the thickness of the punched pit part fully shares the tension with the uncompressed part, so that the thickness of the uncompressed part and the four corners of the punched pit is even. The second stage of pit punching will gradually compress the middle compression area until the second stage of pit punching is completed. Optionally, during the process of compressing the intermediate compression area, the pressure changes linearly with the depth of the punching pit, or it can also change nonlinearly. In some embodiments, the method of compressing the middle pressing area may also be to gradually compress the middle pressing area inwardly from the peripheral edge pressing area. Since the middle compression area is gradually compressed during the second stage of punching, there is not much difference in the overall thickness after the punching is completed. Compared with the previous forming method, the thickness of the four corners of the punching hole is thicker, and the punching can be well avoided. The fish scales, wrinkles and other problems generated during the process make the inner wall of the molded shell smooth and smooth. Optional, the battery shell is made of aluminum plastic film, high-strength steel, magnesium alloy, aluminum alloy, high-performance plastic or carbon fiber composite materials, etc.

本申请实施例中,待加工膜片30进行分段式冲坑之前具有预设温度。In the embodiment of the present application, the diaphragm 30 to be processed has a preset temperature before being punched in a segmented manner.

具体地,待加工膜片30在经过冲坑成型前可以通过预加热的方式来提高可塑性,使冲坑成型效果更好,冲坑成型后的电池壳体不会有内应力导致壳体发生形变,壳体品质更高。Specifically, the plasticity of the diaphragm 30 to be processed can be improved by preheating before punching and molding, so that the punching and molding effect is better, and the battery case after punching and molding will not have internal stress that causes the case to deform. , the shell quality is higher.

在可能的实施方式中,预设温度为30℃-60℃。优选的,上述预设温度可以为45℃。In a possible implementation, the preset temperature is 30°C-60°C. Preferably, the above-mentioned preset temperature may be 45°C.

本申请实施例中,对待加工膜片30的预热温度可根据待加工膜片30的材质等因素实际选择确定。In the embodiment of the present application, the preheating temperature of the diaphragm 30 to be processed can be selected and determined based on factors such as the material of the diaphragm 30 to be processed.

在可能的实施方式中,第一预设深度为目标凹槽深度的0.25-0.35倍。例如,所述第一预设深度为目标凹槽深度的0.3倍。In a possible implementation, the first preset depth is 0.25-0.35 times the target groove depth. For example, the first preset depth is 0.3 times the target groove depth.

本申请实施例中,冲坑的过程为连续不间断的过程,冲坑过程中对边部的压紧压力根据冲坑深度来分段变化。可选的,在冲坑深度为目标深度的0.25-0.35倍时选择定压力压紧外围压边区域,然后选择变压力逐渐压紧中间压紧区域,同时进行第二段冲坑。In the embodiment of the present application, the process of punching the pit is a continuous and uninterrupted process. During the process of punching the pit, the pressing pressure on the edge changes in stages according to the depth of the pit. Optionally, when the punching depth is 0.25-0.35 times the target depth, select constant pressure to compress the peripheral edge area, and then select variable pressure to gradually compress the middle compression area while performing the second stage of punching.

在可能的实施方式中,目标凹槽为圆形槽或多边形槽,目标凹槽的底部边缘具有圆角。例如,目标凹槽为方形槽。In a possible implementation, the target groove is a circular groove or a polygonal groove, and the bottom edge of the target groove has rounded corners. For example, the target groove is a square groove.

本申请实施例中,目标凹槽的形状可根据电池壳体实际使用时的需求来确定,可选的,目标凹槽为圆形槽,也可以为规则多边形凹槽或异形凹槽。优选的,无论什么形状的凹槽,其底部的边缘均为圆角,圆角可保证边缘的厚度,同时分散应力,使壳体成型质量更好。In the embodiment of the present application, the shape of the target groove can be determined according to the actual use requirements of the battery case. Optionally, the target groove can be a circular groove, or it can also be a regular polygonal groove or a special-shaped groove. Preferably, regardless of the shape of the groove, the edges at the bottom are rounded. The rounded corners can ensure the thickness of the edges and at the same time disperse stress, making the shell molding quality better.

如图2所示,本申请公开了一种电池壳体,壳体由一待加工膜片30经分段式冲坑成型,壳体具有至少一个目标凹槽,每个目标凹槽分别对应有待加工膜片30的预设加工区域,预设加工区域由外向内依次定义为外围压边区域、中间压紧区域和冲压接触区域;分段式冲坑包括第一段冲坑、第二段冲坑和第三段冲坑,其中,第一段冲坑为压紧外围压边区域,并冲压上述冲压接触区域形成具有第一预设深度的凹槽;第二段冲坑为继续冲压上述冲压接触区域,并同时逐渐压紧中间压紧区域形成第二预设深度的凹槽;第三段冲坑为继续冲压上述冲压接触区域形成目标凹槽。As shown in Figure 2, this application discloses a battery case. The case is formed by segmented punching of a diaphragm 30 to be processed. The case has at least one target groove, and each target groove corresponds to the target groove to be processed. The preset processing area for processing the diaphragm 30 is defined from the outside to the inside as the peripheral edge pressing area, the middle pressing area and the stamping contact area; the segmented punching pit includes the first punching pit, the second punching pit The first punching pit is to press the peripheral edge area and punch the above-mentioned punching contact area to form a groove with a first preset depth; the second punching pit is to continue punching the above-mentioned punching contact area, and at the same time gradually compress the middle pressing area to form a groove with a second preset depth; the third punching pit is to continue punching the above-mentioned punching contact area to form a target groove.

本申请实施例所述的电池壳体,经过三段冲坑成型,第一段冲坑过程中,仅压紧外围压边区域,中间压紧区域和冲压接触区域为未压紧区,此时未压紧部位面积大,冲坑部分厚度与未压紧部位充分分担张力,使未压紧部分与冲坑四个角部厚度均匀。第二段冲坑过程会逐渐压紧中间压紧区域,直至第二段冲坑完成。可选的,在压紧中间压紧区域过程中,压力随冲坑深度呈线性变化,也可以为非线性变化。在一些实施例中,压紧中间压紧区域的方法还可以为从外围压边区域逐渐向内压紧中间压紧区域。第三段冲坑为在压紧外围压边区域和中间压紧区域的情况下,对冲压壳体的进一步修整,提高成型质量。由于第二段冲坑过程中为逐渐压紧中间压紧区域,故冲坑完毕后整体厚度差异不大,较以往成型方法冲坑四个角部厚度更厚,并可以很好的避免冲坑过程中产生的鱼鳞纹,褶皱等问题,使成型后的壳体内壁平整光滑。可选的,电池壳体的材质为铝塑膜、高强度钢、镁合金、铝合金、高性能塑料或碳纤维复合材料等。The battery case described in the embodiment of this application is formed through three stages of punching. During the first stage of punching, only the peripheral edge pressing area is pressed, and the middle pressing area and the stamping contact area are unpressed areas. At this time The area of the uncompressed part is large, and the thickness of the punched pit part fully shares the tension with the uncompressed part, so that the thickness of the uncompressed part and the four corners of the punched pit is even. The second stage of pit punching will gradually compress the middle compression area until the second stage of pit punching is completed. Optionally, during the process of compressing the intermediate compression area, the pressure changes linearly with the depth of the punching pit, or it can also change nonlinearly. In some embodiments, the method of compressing the middle pressing area may also be to gradually compress the middle pressing area inwardly from the peripheral edge pressing area. The third stage of punching is to further trim the stamped shell and improve the molding quality while pressing the outer edge pressing area and the middle pressing area. Since the middle compression area is gradually compressed during the second stage of punching, there is not much difference in the overall thickness after the punching is completed. Compared with the previous forming method, the thickness of the four corners of the punching hole is thicker, and the punching can be well avoided. The fish scales, wrinkles and other problems generated during the process make the inner wall of the molded shell smooth and smooth. Optional, the battery shell is made of aluminum plastic film, high-strength steel, magnesium alloy, aluminum alloy, high-performance plastic or carbon fiber composite materials, etc.

本申请实施例中,待加工膜片30进行分段式冲坑之前具有预设温度。In the embodiment of the present application, the diaphragm 30 to be processed has a preset temperature before being punched in a segmented manner.

具体地,待加工膜片30在经过冲坑成型前可以通过预加热的方式来提高可塑性,使冲坑成型效果更好,冲坑成型后的电池壳体不会有内应力导致壳体发生形变,壳体品质更高。Specifically, the plasticity of the diaphragm 30 to be processed can be improved by preheating before punching and molding, so that the punching and molding effect is better, and the battery case after punching and molding will not have internal stress that causes the case to deform. , the shell quality is higher.

在可能的实施例中,预设温度为30℃-60℃。优选的,上述预设温度可以为45℃。In a possible embodiment, the preset temperature is 30°C-60°C. Preferably, the above-mentioned preset temperature may be 45°C.

本申请实施例中,对待加工膜片30的预热温度可根据待加工膜片30的材质等因素实际选择确定。In the embodiment of the present application, the preheating temperature of the diaphragm 30 to be processed can be selected and determined based on factors such as the material of the diaphragm 30 to be processed.

在可能的实施例中,第一预设深度为目标凹槽深度的0.25-0.35倍。例如,第一预设深度可以为目标凹槽深度的0.3倍。In a possible embodiment, the first preset depth is 0.25-0.35 times the target groove depth. For example, the first preset depth may be 0.3 times the target groove depth.

在可能的实施例中,第二预设深度为目标凹槽深度的0.9-0.95倍。例如,第二预设深度为目标凹槽深度的0.93倍。In a possible embodiment, the second preset depth is 0.9-0.95 times the target groove depth. For example, the second preset depth is 0.93 times the target groove depth.

本申请实施例中,冲坑的过程为连续不间断的过程,冲坑过程中对边部的压紧压力根据冲坑深度来分段变化。可选的,在冲坑深度为目标深度的0.25-0.35倍时选择定压力压紧外围压边区域,然后选择变压力逐渐压紧中间压紧区域,同时进行第二段冲坑。第二段冲坑结束时,外围压边区域和中间压紧区域均被压紧,此时压力不在变化,进行第三段冲坑对成型壳体进行修整。可选的,第二段冲坑完成时,冲坑深度达到目标深度的0.9-0.95倍。In the embodiment of the present application, the process of punching the pit is a continuous and uninterrupted process. During the process of punching the pit, the pressing pressure on the edge changes in stages according to the depth of the pit. Optionally, when the punching depth is 0.25-0.35 times the target depth, select constant pressure to compress the peripheral edge area, and then select variable pressure to gradually compress the middle compression area while performing the second stage of punching. At the end of the second stage of punching, both the peripheral edge pressing area and the middle pressing area are compressed. At this time, the pressure no longer changes, and the third stage of punching is carried out to trim the molded shell. Optional, when the second stage of pit punching is completed, the pit punching depth reaches 0.9-0.95 times the target depth.

在可能的实施例中,目标凹槽为圆形槽或多边形槽,目标凹槽的底部边缘具有圆角。例如,目标凹槽为方形槽。In a possible embodiment, the target groove is a circular groove or a polygonal groove, and the bottom edge of the target groove has rounded corners. For example, the target groove is a square groove.

本申请实施例中,目标凹槽的形状可根据电池壳体实际使用时的需求来确定,可选的,目标凹槽为圆形槽,也可以为规则多边形凹槽或异形凹槽。优选的,无论什么形状的凹槽,其底部的边缘均为圆角,圆角可保证边缘的厚度,同时分散应力,使壳体成型质量更好。In the embodiment of the present application, the shape of the target groove can be determined according to the actual use requirements of the battery case. Optionally, the target groove can be a circular groove, or it can also be a regular polygonal groove or a special-shaped groove. Preferably, regardless of the shape of the groove, the edges at the bottom are rounded. The rounded corners can ensure the thickness of the edges and at the same time disperse stress, making the shell molding quality better.

如图3和图4所示,并结合图1和图2,本申请公开了一种电池壳体成型方法,包括:对待加工膜片30进行第一段冲坑,其中,所述待加工膜片具有预设加工区域,所述预设加工区域由外向内依次定义为外围压边区域、中间压紧区域和冲压接触区域,第一段冲坑为压紧外围压边区域,并冲压上述冲压接触区域形成具有第一预设深度的凹槽;对待加工膜片30进行第二段冲坑,第二段冲坑为继续冲压上述冲压接触区域,并逐渐压紧中间压紧区域形成具有第二预设深度的凹槽或直接形成目标凹槽。As shown in Figures 3 and 4, and in combination with Figures 1 and 2, the present application discloses a battery shell forming method, including: performing a first stage of punching a diaphragm 30 to be processed, wherein the diaphragm to be processed has a preset processing area, and the preset processing areas are defined as a peripheral edge pressing area, an intermediate pressing area and a stamping contact area from the outside to the inside, and the first stage of punching is to press the peripheral edge pressing area, and to punch the above-mentioned stamping contact area to form a groove with a first preset depth; performing a second stage of punching a diaphragm 30 to be processed, and the second stage of punching is to continue punching the above-mentioned stamping contact area, and gradually press the intermediate pressing area to form a groove with a second preset depth or directly form a target groove.

本申请实施例中,待加工膜片30通过冲坑成型得到电池壳体,冲坑过程分为多段。对待加工膜片30进行预处理后进行冲坑,预处理包括对膜片的尺寸、形状设计等,然后进行第一段冲坑。膜片的加工区域由外向内依次为外围压边区域、中间压紧区域和冲压接触区域。第一段冲坑过程中,首先对外围压边区域进行压紧,进行第一段冲坑。第一段冲坑达到预设深度后开始进行第二段冲坑,此时开始对中间压紧区域逐渐压紧,可选的,在压紧中间压紧区域过程中,压力随冲坑深度呈线性变化,也可以为非线性变化。在一些实施例中,压紧中间压紧区域的方法还可以为从外围压边区域逐渐向内压紧中间压紧区域。第二段冲坑过程可直接达到目标冲坑深度得到电池壳体。在一些实施例中,还可以对完成第二段冲坑的壳体进行进一步的修整,是成型的电池壳体质量更稳定。In the embodiment of the present application, the diaphragm 30 to be processed is formed into a battery case by punching, and the punching process is divided into multiple stages. The diaphragm 30 to be processed is pre-processed and then punched. The pre-processing includes designing the size and shape of the diaphragm, etc., and then the first stage of punching is carried out. The processing area of the diaphragm is the peripheral edge pressing area, the middle pressing area and the stamping contact area from the outside to the inside. During the first stage of pit punching, the peripheral edge pressing area is first pressed and the first stage of pit punching is carried out. After the first stage of punching reaches the preset depth, the second stage of punching begins. At this time, the middle compression area begins to be gradually compressed. Optionally, during the process of compressing the middle compression area, the pressure increases with the depth of the punching hole. Linear changes can also be non-linear changes. In some embodiments, the method of compressing the middle pressing area may also be to gradually compress the middle pressing area inwardly from the peripheral edge pressing area. In the second stage of the pit punching process, the target punching depth can be directly reached to obtain the battery case. In some embodiments, the casing that has been punched in the second stage can be further trimmed to make the quality of the formed battery casing more stable.

当所述第二段冲坑为形成具有所述第二预设深度的凹槽时,成型方法还包括:对待加工膜片30进行第三段冲坑,第三段冲坑为继续冲压上述冲压接触区域形成目标凹槽。When the second punching step is to form a groove having the second preset depth, the forming method further comprises: performing a third punching step on the diaphragm 30 to be processed, wherein the third punching step is to continue punching the above-mentioned punching contact area to form a target groove.

本申请实施例中,在完成第二段冲坑后,外围压紧区域和中间压紧区域均被压紧,此时还可以进行第三段冲坑对成型壳体进行修整。In the embodiment of the present application, after the second stage of punching is completed, both the peripheral pressing area and the middle pressing area are pressed. At this time, the third stage of punching can also be carried out to trim the molded shell.

在可能的实施例中,第一预设深度为目标凹槽深度的0.25-0.35倍。例如,第一预设深度为目标凹槽深度的0.3倍。In a possible embodiment, the first preset depth is 0.25-0.35 times the target groove depth. For example, the first preset depth is 0.3 times the target groove depth.

本申请实施例中,在第一段冲坑过程中,只有外围压紧区域被压紧,此时可以完成冲坑目标深度的0.25至0.35,然后开始压紧中间压紧区域,同时进行第二段冲坑。第二段冲坑可直接达到目标冲坑深度。在一些实施例中,第二段冲坑完成时,冲坑深度达到目标深度的0.9至0.95,然后再进行第三段冲坑对整个成型壳体进行修整,以保证成型质量。In the embodiment of the present application, during the first stage of pit punching, only the peripheral compaction area is compacted. At this time, the target depth of 0.25 to 0.35 of the pit punch can be completed, and then the middle compaction area starts to be compacted, while the second Duan Chongkeng. The second stage of punching can directly reach the target punching depth. In some embodiments, when the second stage of punching is completed, the depth of the hole reaches 0.9 to 0.95 of the target depth, and then the third stage of punching is performed to trim the entire molded shell to ensure the molding quality.

在可能的实施方式中,目标凹槽可以为圆形槽或多边形槽,目标凹槽的底部边缘具有圆角。例如,所述目标凹槽为方形槽。In a possible implementation, the target groove may be a circular groove or a polygonal groove, and the bottom edge of the target groove has a rounded corner. For example, the target groove is a square groove.

本申请实施例中,目标凹槽的形状可根据电池壳体实际使用时的需求来确定,可选的,目标凹槽为圆形槽,也可以为规则多边形凹槽或异形凹槽,目标凹槽的底部边缘具有圆角。冲坑的槽型及底部的圆角均可通过设计冲坑凸模11的形状在冲坑过程中得到,无须后期再进行加工,降低工艺成本。In the embodiment of the present application, the shape of the target groove can be determined according to the actual use requirements of the battery case. Optionally, the target groove can be a circular groove, or it can also be a regular polygonal groove or a special-shaped groove. The bottom edge of the slot has rounded corners. The groove shape of the punching pit and the rounded corners at the bottom can be obtained during the punching process by designing the shape of the punching punch 11, eliminating the need for subsequent processing, thereby reducing process costs.

在可能的实施方式中,对待加工膜片30进行第一段冲坑之前还包括:将待加工膜片30经过温度调节装置20达到预设温度。In a possible implementation, before the first stage of punching the diaphragm 30 to be processed, the process further includes: passing the diaphragm 30 to be processed through the temperature adjustment device 20 to reach a preset temperature.

本申请实施例中,在对待加工膜片30冲坑之前,还有对膜片的预热过程,对待加工膜片30预热能够提高待加工膜片30的可塑性,是成型质量更好。In the embodiment of the present application, before punching the diaphragm 30 to be processed, there is a preheating process for the diaphragm. Preheating the diaphragm 30 to be processed can improve the plasticity of the diaphragm 30 to be processed, resulting in better molding quality.

在可能的实施方式中,温度调节装置20采用的加热方式为辐射加热或接触式加热。In a possible implementation, the heating method adopted by the temperature adjustment device 20 is radiation heating or contact heating.

本申请实施例中,温度调节装置20对待加工膜片30的加热方式可选为辐射式加热或接触式加热,辐射式加热可使待加工膜片30受热更均匀,接触式加热可以提高热传递效率,具体可根据实际生产情况确定。In the embodiment of the present application, the heating method of the temperature regulating device 20 for the diaphragm 30 to be processed can be selected as radiant heating or contact heating. Radiant heating can make the diaphragm 30 to be processed more evenly heated, and contact heating can improve heat transfer. Efficiency can be determined based on actual production conditions.

在可能的实施方式中,预设温度为30℃-60℃。优选的,上述预设温度可以为45℃。In a possible implementation, the preset temperature is 30°C-60°C. Preferably, the above-mentioned preset temperature may be 45°C.

本申请实施例中,可根据温度调节装置20以及待加工膜片30的材质,选择合适的预加热温度。In the embodiment of the present application, a suitable preheating temperature can be selected according to the material of the temperature regulating device 20 and the film 30 to be processed.

如图5所示,温度调节装置20采用的加热方式为辐射加热,待加工膜片30与温度调节装置20之间的距离为50mm-200mm。As shown in Figure 5, the heating method used by the temperature regulating device 20 is radiant heating, and the distance between the diaphragm 30 to be processed and the temperature regulating device 20 is 50mm-200mm.

本申请实施例中,预热过程可选为辐射式加热,在待加工膜片30传送过程中进行,对生产效率无延迟,且冲坑过程也是连贯一次成型,保证生产效率,生产的良率更高,生产成本更低。待加工膜片30与温度调节装置20的距离可根据环境以及装置的加热能力灵活调整。可选的,温度调节装置20为红外线辐射加热装置,其安装位置为红外线辐射加热面板平行于铝塑膜,加热装置包括控制器,控制器可以控制加热时间和加热温度。In the embodiment of the present application, the preheating process can be selected as radiant heating, which is carried out during the transfer process of the diaphragm 30 to be processed, without delaying the production efficiency, and the punching process is also a continuous one-time forming, ensuring production efficiency and production yield. Higher and lower production costs. The distance between the diaphragm 30 to be processed and the temperature adjustment device 20 can be flexibly adjusted according to the environment and the heating capacity of the device. Optionally, the temperature adjustment device 20 is an infrared radiation heating device, which is installed in a position where the infrared radiation heating panel is parallel to the aluminum plastic film. The heating device includes a controller, and the controller can control the heating time and heating temperature.

如图6所示,依据上述电池壳体成型方法,本申请还公开了一种用于电池壳体成型的冲压装置,包括:冲坑凸模11;下凹模板12,下凹模板12上设有凹陷,凹陷的轮廓为规则形状或不规则形状,凹陷与冲坑凸模11相匹配;第一压紧模板13,第一压紧模板13设置在下凹模板12的上部,用于压紧待加工膜片30的外围压边区域;第二压紧模板14,第二压紧模板14设置在第一压紧模板13的上部,用于压紧待加工膜片30的中间压紧区域。As shown in Figure 6, based on the above-mentioned battery case forming method, this application also discloses a stamping device for battery case forming, including: a punching punch 11; a concave template 12, and a concave template 12 with a There is a depression, and the outline of the depression is a regular shape or an irregular shape, and the depression matches the punching punch 11; the first pressing template 13 is arranged on the upper part of the concave template 12 for pressing the to-be-processed punch. The peripheral pressing area of the diaphragm 30 is processed; the second pressing template 14 is arranged on the upper part of the first pressing template 13 and is used to press the middle pressing area of the diaphragm 30 to be processed.

本申请实施例中,冲压装置包括从上至下依次设置的冲坑凸模11及下凹模板12;冲坑凸模11与下凹模之间从上至下依次设置的第二压紧模板14和第一压紧模板13。下凹模板12为″回″字型模板,下凹模板12,下凹模板12上设有凹陷,凹陷的轮廓为规则形状或不规则形状,凹陷与冲坑凸模11相匹配。第一压紧模板13设置在下凹模板12的上部,第一压紧模板13用于压紧待加工膜片30,第一压紧模板13上设有第一凹坑,第一凹坑的轮廓与冲坑凸模11匹配;第二压紧模板14设置在第一压紧模板13的上部,第二压紧模板14上设有第二凹坑,第二凹坑的轮廓与冲坑凸模11匹配。第一凹坑的的轮廓距第一压紧模板13的边沿具有最大距离,最大距离为5mm-30mm。第二压紧模板14的外轮廓在水平面上的投影与凹陷的轮廓在水平面上的投影距离为0.1mm-5mm。冲坑凸模11与第二凹坑间隙配合,第二凹坑与冲坑凸模11配合时的间隙距离为1mm-5mm。冲坑凸模11的表面粗糙度为1.0s-5.0s。内压紧凹模板的表面粗糙度为3.0s。In the embodiment of the present application, the punching device includes a punching punch 11 and a lower concave template 12 arranged sequentially from top to bottom; a second pressing template 14 and a first pressing template 13 are arranged sequentially from top to bottom between the punching punch 11 and the lower concave template. The lower concave template 12 is a "Hu"-shaped template, and the lower concave template 12 is provided with a depression, and the contour of the depression is a regular shape or an irregular shape, and the depression matches the punching punch 11. The first pressing template 13 is arranged on the upper part of the lower concave template 12, and the first pressing template 13 is used to press the membrane 30 to be processed, and the first pressing template 13 is provided with a first concave, and the contour of the first concave matches the punching punch 11; the second pressing template 14 is arranged on the upper part of the first pressing template 13, and the second pressing template 14 is provided with a second concave, and the contour of the second concave matches the punching punch 11. The contour of the first concave has a maximum distance from the edge of the first pressing template 13, and the maximum distance is 5mm-30mm. The projection distance between the outer contour of the second pressing template 14 on the horizontal plane and the projection distance between the concave contour on the horizontal plane is 0.1mm-5mm. The punching punch 11 and the second concave are matched with each other in a clearance, and the clearance distance between the second concave and the punching punch 11 is 1mm-5mm. The surface roughness of the punching punch 11 is 1.0s-5.0s. The surface roughness of the inner pressing concave template is 3.0s.

工作时,第一压紧模板13首先配合下凹模板12压紧待加工膜片30的最外圈。冲坑凸模11为冲坑成型模头,工作时,待第一压紧模板13和下凹模板12压紧后,开始进行第一段冲坑。此第一段过程起止为冲坑凸模11从原位开始至接触待加工膜片30进行冲坑至目标深度的0.25至0.35倍为止。第二段过程起止为第一段冲压完成的深度开始至距离目标深度。在一些实施例中,第二段过程起止为第一段冲压完成的深度开始至距离目标深度的0.9至0.95。第三段过程起止为第二段过程冲坑深度至目标深度。第二压紧模板14同为″回″字型模板,工作时为第二段冲坑时起,第二压紧模板14开始下降,第二段冲坑完成时第二压紧模板14与下凹模板12加紧。During operation, the first pressing template 13 first cooperates with the concave template 12 to compress the outermost ring of the diaphragm 30 to be processed. The punching punch 11 is a punching forming die. When working, after the first pressing template 13 and the concave template 12 are pressed, the first stage of punching begins. This first stage of the process starts and ends when the punching punch 11 starts from the original position until it contacts the diaphragm 30 to be processed and punches to 0.25 to 0.35 times the target depth. The second stage of the process starts and ends from the depth at which the first stage of stamping is completed to the target depth. In some embodiments, the second stage of the process starts and ends from the depth at which the first stage of stamping is completed to 0.9 to 0.95 from the target depth. The third stage of the process starts and ends from the depth of the second stage of the process to the target depth. The second compression template 14 is also a "return" shaped template. When working, the second compression template 14 starts to descend when the second stage of punching is completed. When the second stage of punching is completed, the second compression template 14 and the lower The concave template 12 is tightened.

冲压装置还包括驱动电机15,第二压紧模板14与驱动电机15连接,驱动电机15用于驱动第二压紧模板14的升降。The stamping device also includes a driving motor 15. The second pressing template 14 is connected to the driving motor 15. The driving motor 15 is used to drive the lifting and lowering of the second pressing template 14.

本申请实施例中,第二压紧模板14与驱动电机15连接,驱动电机15用于驱动第二压紧模板14的升降,第二压紧模板14在竖直面上的最大行程与第一压紧模板13的上表面干涉。可选的,第一压紧模板13包括底板和侧板,驱动电机15设置在侧板上。驱动电机15还可以设置咋其他安装结构上。待加工膜片30冲坑装置还包括控制系统,控制系统用于控制待加工膜片30冲坑装置的各个组成结构运动及配合。In the embodiment of the present application, the second clamping template 14 is connected to the driving motor 15, and the driving motor 15 is used to drive the lifting of the second clamping template 14, and the maximum stroke of the second clamping template 14 on the vertical plane interferes with the upper surface of the first clamping template 13. Optionally, the first clamping template 13 includes a bottom plate and a side plate, and the driving motor 15 is arranged on the side plate. The driving motor 15 can also be arranged on other mounting structures. The punching device for the diaphragm 30 to be processed also includes a control system, which is used to control the movement and coordination of each component structure of the punching device for the diaphragm 30 to be processed.

如图3和图4所示,本申请实施例结合上述冲压装置,对电池壳体的冲坑成型方法进行举例说明。如图5所示,首先采用温度调节装置20装置对铝塑膜进行预加热,温度调节装置20装置为红外线热辐射装置,在铝塑膜输送过程中被加热,加热装置由时间继电器和温度继电器双重控制,加热时间为5秒,辐射后待加工膜片30温度要求为45℃。As shown in Figures 3 and 4, the embodiment of the present application illustrates the punching and forming method of the battery case in combination with the above-mentioned stamping device. As shown in Figure 5, the aluminum-plastic film is first preheated by using the temperature adjustment device 20. The temperature adjustment device 20 is an infrared heat radiation device, which is heated during the transportation process of the aluminum-plastic film. The heating device consists of a time relay and a temperature relay. Dual control, heating time is 5 seconds, and the temperature requirement of the diaphragm to be processed after irradiation is 45°C.

铝塑膜被预加热后,被输送到冲压装置中。首先控制系统控制冲压机构整体下降至第一压紧模板13与下凹模板12压紧,压紧压力要求为1-5Mpa。然后冲坑凸模11开始下降,进行第一段冲坑。当冲坑成型深度至目标深度的1/3时,驱动电机15开始工作,驱动第二压紧模板14下降,下降速度较冲坑凸模11低,同时进行第二段冲坑。此时可直接冲坑至目标深度,也可以进行第三段冲坑对成型壳体进行修整。若进行第三段冲坑,则当冲坑成型深度距离目标深度0.5mm时,第二压紧模板14完成下降,与下凹模板12完成压紧,压力要求为1-5Mpa,此时完成第二段冲坑。此后进行第三段冲坑,冲坑凸模11继续下降至目标深度,冲坑凸模11板与下凹模板12压紧,压力要求为1-5Mpa,再延时0.1-5s后,冲坑凸模11板开始上升,在延时0.1s-5s后第二压紧模板14也开始上升至初始位置,完成冲坑。After the aluminum-plastic film is preheated, it is transported to the stamping device. First, the control system controls the stamping mechanism to descend as a whole until the first clamping template 13 and the concave template 12 are clamped, and the clamping pressure requirement is 1-5Mpa. Then the punching punch 11 starts to descend and the first stage of punching is performed. When the punching forming depth reaches 1/3 of the target depth, the drive motor 15 starts to work and drives the second clamping template 14 to descend. The descending speed is lower than that of the punching punch 11, and the second stage of punching is performed at the same time. At this time, the punching can be directly performed to the target depth, or the third stage of punching can be performed to trim the formed shell. If the third stage of punching is performed, when the punching forming depth is 0.5mm away from the target depth, the second clamping template 14 completes the descent and completes the clamping with the concave template 12. The pressure requirement is 1-5Mpa, and the second stage of punching is completed. After that, the third stage of punching is carried out, and the punching punch 11 continues to descend to the target depth. The punching punch 11 plate is pressed against the concave template 12 with a pressure requirement of 1-5Mpa. After a delay of 0.1-5s, the punching punch 11 plate begins to rise, and after a delay of 0.1s-5s, the second pressing template 14 also begins to rise to the initial position to complete the punching.

上述冲坑成型工艺为连续的冲坑过程,通过上述成型工艺对铝塑膜进行冲坑,完成第一段冲坑后,铝塑膜铝层的厚度为初始厚度的90%以上,完成第二段冲坑后,塑膜铝层的厚度为初始厚度的75%以上,完成第三段冲坑后,塑膜铝层的厚度为初始厚度的70%以上。The above-mentioned punching and forming process is a continuous punching process. The aluminum-plastic film is punched through the above-mentioned forming process. After completing the first step of punching, the thickness of the aluminum layer of the aluminum-plastic film is more than 90% of the initial thickness. After completing the second step, After the first stage of punching, the thickness of the plastic film aluminum layer is more than 75% of the initial thickness. After the third stage of punching, the thickness of the plastic film aluminum layer is more than 70% of the initial thickness.

综上所述,在阅读本详细公开内容之后,本领域技术人员可以明白,前述详细公开内容可以仅以示例的方式呈现,并且可以不是限制性的。尽管这里没有明确说明,本领域技术人员可以理解本申请意图囊括对实施例的各种合理改变,改进和修改。这些改变,改进和修改旨在由本公开提出,并且在本公开的示例性实施例的精神和范围内。In summary, after reading this detailed disclosure, those skilled in the art can understand that the foregoing detailed disclosure may be presented by way of example only, and may not be limiting. Although not explicitly stated herein, those skilled in the art will understand that this application is intended to cover various reasonable changes, improvements, and modifications to the embodiments. Such changes, improvements, and modifications are intended to be proposed by this disclosure and be within the spirit and scope of the exemplary embodiments of this disclosure.

此外,本申请中的某些术语已被用于描述本公开的实施例。例如,“一个实施例”,“实施例”和/或“一些实施例”意味着结合该实施例描述的特定特征,结构或特性可以包括在本公开的至少一个实施例中。因此,可以强调并且应当理解,在本说明书的各个部分中对“实施例”或“一个实施例”或“替代实施例”的两个或更多个引用不一定都指代相同的实施例。此外,特定特征,结构或特性可以在本公开的一个或多个实施例中适当地组合。Additionally, certain terms in this application have been used to describe embodiments of the present disclosure. For example, "one embodiment," "an embodiment," and/or "some embodiments" means that a particular feature, structure or characteristic described in connection with the embodiment may be included in at least one embodiment of the present disclosure. Therefore, it is emphasized and should be understood that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various parts of this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures or characteristics may be combined as appropriate in one or more embodiments of the present disclosure.

应当理解,在本公开的实施例的前述描述中,为了帮助理解一个特征,出于简化本公开的目的,本申请有时将各种特征组合在单个实施例、附图或其描述中。或者,本申请又是将各种特征分散在多个本申请的实施例中。然而,这并不是说这些特征的组合是必须的,本领域技术人员在阅读本申请的时候完全有可能将其中一部分特征提取出来作为单独的实施例来理解。也就是说,本申请中的实施例也可以理解为多个次级实施例的整合。而每个次级实施例的内容在于少于单个前述公开实施例的所有特征的时候也是成立的。It should be understood that in the foregoing description of embodiments of the present disclosure, in order to help understand a feature, and for the purpose of simplifying the disclosure, the present application sometimes combines various features in a single embodiment, drawing, or description thereof. Alternatively, the present application distributes various features in multiple embodiments of the present application. However, this does not mean that the combination of these features is necessary. It is entirely possible for those skilled in the art to extract some of the features as separate embodiments when reading this application. That is to say, the embodiments in this application can also be understood as the integration of multiple secondary embodiments. It is also true that each secondary embodiment resides in less than all features of a single previously disclosed embodiment.

在一些实施方案中,表达用于描述和要求保护本申请的某些实施方案的数量或性质的数字应理解为在某些情况下通过术语“约”,“近似”或“基本上”修饰。例如,除非另有说明,否则“约”,“近似”或“基本上”可表示其描述的值的±20%变化。因此,在一些实施方案中,书面描述和所附权利要求书中列出的数值参数是近似值,其可以根据特定实施方案试图获得的所需性质而变化。在一些实施方案中,数值参数应根据报告的有效数字的数量并通过应用普通的舍入技术来解释。尽管阐述本申请的一些实施方案列出了广泛范围的数值范围和参数是近似值,但具体实施例中都列出了尽可能精确的数值。In some embodiments, numbers expressing quantities or properties used to describe and claim certain embodiments of the present application are to be understood to be modified in some cases by the terms "about," "approximately," or "substantially." For example, unless otherwise specified, "about," "approximately," or "substantially" may mean a ±20% variation of the value it describes. Therefore, in some embodiments, the numerical parameters set forth in the written description and appended claims are approximations that may vary depending on the desired properties sought to be obtained by a particular embodiment. In some embodiments, numerical parameters should be interpreted in light of the number of reported significant digits and by applying ordinary rounding techniques. Although the numerical ranges and parameters set forth in the broad numerical ranges and parameters set forth in some embodiments of the present application are approximations, the specific examples are set forth to the most precise extent possible.

本文引用的每个专利,专利申请,专利申请的出版物和其他材料,例如文章,书籍,说明书,出版物,文件,物品等,可以通过引用结合于此。用于所有目的的全部内容,除了与其相关的任何起诉文件历史,可能与本文件不一致或相冲突的任何相同的,或者任何可能对权利要求的最宽范围具有限制性影响的任何相同的起诉文件历史。现在或以后与本文件相关联。举例来说,如果在与任何所包含的材料相关联的术语的描述、定义和/或使用与本文档相关的术语、描述、定义和/或之间存在任何不一致或冲突时,使用本文件中的术语为准。Each patent, patent application, publication of a patent application, and other material, such as articles, books, specifications, publications, documents, articles, etc., cited herein is hereby incorporated by reference. The entire contents for all purposes, except for the history of any prosecution documents related thereto, any identical prosecution documents that may be inconsistent or conflicting with this document, or any identical prosecution documents that may have a restrictive effect on the broadest scope of the claims. history. now or hereafter associated with this document. For example, if there is any inconsistency or conflict between the descriptions, definitions and/or use of terms associated with any included material, use of the terms, descriptions, definitions and/or use in this document terminology shall prevail.

最后,应理解,本文公开的申请的实施方案是对本申请的实施方案的原理的说明。其他修改后的实施例也在本申请的范围内。因此,本申请披露的实施例仅仅作为示例而非限制。本领域技术人员可以根据本申请中的实施例采取替代配置来实现本申请中的申请。因此,本申请的实施例不限于申请中被精确地描述过的哪些实施例。Finally, it is to be understood that the embodiments of the application disclosed herein are illustrative of the principles of embodiments of the application. Other modified embodiments are within the scope of this application. Therefore, the embodiments disclosed in this application are merely examples and not limitations. Those skilled in the art may adopt alternative configurations to implement the applications in this application based on the embodiments in this application. Therefore, the embodiments of the present application are not limited to those embodiments precisely described in the application.

Claims (15)

1.一种电池壳体,其特征在于,所述壳体由一待加工膜片经分段式冲坑成型,所述壳体具有至少一个目标凹槽,每个所述目标凹槽分别对应有所述待加工膜片的预设加工区域,所述预设加工区域由外向内依次定义为外围压边区域、中间压紧区域和冲压接触区域;1. A battery casing, characterized in that the casing is formed by segmented punching from a diaphragm to be processed, the casing has at least one target groove, and each of the target grooves corresponds to There is a preset processing area for the diaphragm to be processed, and the preset processing area is defined from outside to inside as a peripheral edge pressing area, a middle pressing area and a stamping contact area; 所述分段式冲坑包括第一段冲坑和第二段冲坑,其中,所述第一段冲坑为压紧所述外围压边区域,并冲压所述冲压接触区域形成具有第一预设深度的凹槽;所述第二段冲坑为继续冲压所述冲压接触区域,并同时逐渐压紧所述中间压紧区域形成所述目标凹槽;所述待加工膜片进行所述分段式冲坑之前具有预设温度。The segmented punching pit includes a first punching pit and a second punching pit, wherein the first punching pit is to compress the peripheral edge blanking area and punch the punching contact area to form a first punching pit. A groove with a preset depth; the second punching pit is to continue punching the punching contact area, and at the same time gradually compress the intermediate pressing area to form the target groove; the diaphragm to be processed is processed as described There is a preset temperature before segmented pit punching. 2.根据权利要求1所述的电池壳体,其特征在于,所述预设温度为30℃-60℃。2. The battery case according to claim 1, wherein the preset temperature is 30°C-60°C. 3.根据权利要求2所述的电池壳体,其特征在于,所述第一预设深度为所述目标凹槽深度的0.25-0.35倍。3 . The battery case according to claim 2 , wherein the first preset depth is 0.25-0.35 times the target groove depth. 4.根据权利要求3所述的电池壳体,其特征在于,所述目标凹槽为圆形槽或多边形槽,所述目标凹槽的底部边缘具有圆角。4. The battery case according to claim 3, wherein the target groove is a circular groove or a polygonal groove, and the bottom edge of the target groove has rounded corners. 5.一种电池壳体,其特征在于,所述壳体由一待加工膜片经分段式冲坑成型,所述壳体具有至少一个目标凹槽,每个所述目标凹槽分别对应有所述待加工膜片的预设加工区域,所述预设加工区域由外向内依次定义为外围压边区域、中间压紧区域和冲压接触区域;5. A battery case, characterized in that the case is formed by segmented punching from a diaphragm to be processed, the case has at least one target groove, and each target groove corresponds to There is a preset processing area for the diaphragm to be processed, and the preset processing area is defined from outside to inside as a peripheral edge pressing area, a middle pressing area and a stamping contact area; 所述分段式冲坑包括第一段冲坑、第二段冲坑和第三段冲坑,其中,所述第一段冲坑为压紧所述外围压边区域,并冲压所述冲压接触区域形成具有第一预设深度的凹槽;所述第二段冲坑为继续冲压所述冲压接触区域,并同时逐渐压紧所述中间压紧区域形成第二预设深度的凹槽;所述第三段冲坑为继续冲压所述冲压接触区域形成所述目标凹槽;所述待加工膜片进行所述分段式冲坑之前具有预设温度。The segmented punching pit includes a first section punching pit, a second section punching pit and a third section punching pit, wherein the first section punching pit is to compress the peripheral blanking area and punch the punching pit The contact area forms a groove with a first preset depth; the second punching pit is to continue punching the punching contact area, and at the same time gradually compress the middle pressing area to form a groove with a second preset depth; The third stage of punching is to continue punching the punching contact area to form the target groove; the diaphragm to be processed has a preset temperature before the segmented punching. 6.根据权利要求5所述的电池壳体,其特征在于,所述预设温度为30℃-60℃。6. The battery case according to claim 5, wherein the preset temperature is 30°C-60°C. 7.根据权利要求6所述的电池壳体,其特征在于,所述第一预设深度为所述目标凹槽深度的0.25-0.35倍;和/或,所述第二预设深度为所述目标凹槽深度的0.9-0.95倍。7. The battery case according to claim 6, wherein the first preset depth is 0.25-0.35 times the target groove depth; and/or the second preset depth is the target groove depth. 0.9-0.95 times the target groove depth. 8.根据权利要求7所述的电池壳体,其特征在于,所述目标凹槽为圆形槽或多边形槽,所述目标凹槽的底部边缘具有圆角。8. The battery case according to claim 7, wherein the target groove is a circular groove or a polygonal groove, and the bottom edge of the target groove has rounded corners. 9.一种电池壳体成型方法,其特征在于,包括:9. A battery case forming method, characterized by comprising: 对待加工膜片进行第一段冲坑,其中,所述待加工膜片具有预设加工区域,所述预设加工区域由外向内依次定义为外围压边区域、中间压紧区域和冲压接触区域,所述第一段冲坑为压紧外围压边区域,并冲压所述冲压接触区域形成具有第一预设深度的凹槽;The diaphragm to be processed is punched in the first stage, wherein the diaphragm to be processed has a preset processing area, and the preset processing area is defined from outside to inside as a peripheral edge pressing area, a middle pressing area and a stamping contact area. , the first punching pit is to press the peripheral edge area, and punch the punching contact area to form a groove with a first preset depth; 对待加工膜片进行第二段冲坑,所述第二段冲坑为继续冲压所述冲压接触区域,并同时逐渐压紧中间压紧区域形成具有第二预设深度的凹槽或目标凹槽;所述对待加工膜片进行第一段冲坑之前还包括:将所述待加工膜片经过温度调节装置达到预设温度。The membrane to be processed is subjected to a second stage of punching, wherein the second stage of punching is to continue punching the punching contact area and gradually press the middle pressing area to form a groove or a target groove with a second preset depth; before the first stage of punching is performed on the membrane to be processed, it also includes: passing the membrane to be processed through a temperature regulating device to reach a preset temperature. 10.根据权利要求9所述的电池壳体成型方法,其特征在于,当所述第二段冲坑为形成具有所述第二预设深度的凹槽时,所述成型方法还包括:对待加工膜片进行第三段冲坑,所述第三段冲坑为继续冲压所述冲压接触区域形成目标凹槽。10. The battery case forming method according to claim 9, characterized in that when the second section of punching pit is to form a groove with the second preset depth, the forming method further includes: The diaphragm is processed to perform a third stage of punching, and the third stage of punching is to continue punching the punching contact area to form a target groove. 11.根据权利要求10所述的电池壳体成型方法,其特征在于,所述第一预设深度为所述目标凹槽深度的0.25-0.35倍。11. The battery case forming method according to claim 10, wherein the first preset depth is 0.25-0.35 times of the target groove depth. 12.根据权利要求11所述的电池壳体成型方法,其特征在于,所述目标凹槽为圆形槽或多边形槽,所述目标凹槽的底部边缘具有圆角。12. The battery case forming method according to claim 11, wherein the target groove is a circular groove or a polygonal groove, and the bottom edge of the target groove has rounded corners. 13.根据权利要求9所述的电池壳体成型方法,其特征在于,所述温度调节装置采用的加热方式为辐射加热或接触式加热。13. The battery case forming method according to claim 9, wherein the heating method used by the temperature adjustment device is radiation heating or contact heating. 14.根据权利要求13所述的电池壳体成型方法,其特征在于,所述预设温度为30℃-60℃。14. The battery case forming method according to claim 13, wherein the preset temperature is 30°C-60°C. 15.根据权利要求14所述的电池壳体成型方法,其特征在于,所述温度调节装置采用的加热方式为辐射加热,所述待加工膜片与所述温度调节装置之间的距离为50mm-200mm。15 . The battery shell forming method according to claim 14 , characterized in that the heating method adopted by the temperature regulating device is radiation heating, and the distance between the film to be processed and the temperature regulating device is 50 mm-200 mm.
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Address after: 421681 Jinwei Road, Guiyang Industrial Park, Qidong County, Hengyang City, Hunan Province

Patentee after: Hunan Lingpai Technology Group Co.,Ltd.

Country or region after: China

Patentee after: Hunan Lingpai Lithium Energy Co.,Ltd.

Patentee after: Hengyang Gaopai New Energy Technology Co.,Ltd.

Patentee after: Hunan Lingpai New Energy Research Institute Co.,Ltd.

Patentee after: Hunan Lingpai Energy Storage Technology Co.,Ltd.

Address before: Jinwei Road, Guiyang Industrial Park, Qidong County, Hengyang City, Hunan Province

Patentee before: Hunan lingpaidazhi Technology Co.,Ltd.

Country or region before: China

Patentee before: Hunan Lingpai Lithium Energy Co.,Ltd.

Patentee before: Hengyang Gaopai New Energy Technology Co.,Ltd.

Patentee before: Hunan Lingpai New Energy Research Institute Co.,Ltd.

Patentee before: Hunan Lingpai Energy Storage Technology Co.,Ltd.