CN207957324U - 二次电池集流体的加工设备 - Google Patents

二次电池集流体的加工设备 Download PDF

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CN207957324U
CN207957324U CN201820356787.9U CN201820356787U CN207957324U CN 207957324 U CN207957324 U CN 207957324U CN 201820356787 U CN201820356787 U CN 201820356787U CN 207957324 U CN207957324 U CN 207957324U
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foil
current collector
composite current
process equipment
welder
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吴聪苗
林进伟
周龙
张喜冲
李克强
吴祖钰
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Contemporary Amperex Technology Co Ltd
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Contemporary Amperex Technology Co Ltd
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Priority to EP19152954.4A priority patent/EP3539772B1/en
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Abstract

本申请涉及二次电池集流体的加工设备。该加工设备包括：箔材放卷辊；复合集流体放卷辊；焊接装置；多个驱动辊；以及收卷辊，其中，箔材放卷辊和复合集流体放卷辊均设置于所述焊接装置的入料侧，所述焊接装置设置成将箔材焊接于复合集流体的局部，各所述驱动辊分别设置于所述焊接装置的入料侧和出料侧，且线速度相等，各所述驱动辊设置成带动重叠后的箔材与复合集流体向下游输送，所述收卷辊设置成收卷焊接后的所述箔材的复合集流体。该方案中，焊接装置可以将箔材焊接于复合集流体的局部，使得箔材可以作为复合集流体的极耳使用，通过箔材的转接，使得电芯中的电流得以被输送出来。

Description

二次电池集流体的加工设备
技术领域
本申请涉及储能器件加工技术领域，尤其涉及一种二次电池集流体的加工设备。
背景技术
锂电池中，通常采用铝箔作为阴极集流体，采用铜箔作为阳极集流体，随着电池行业的不断发展，可以采用具有更佳性能的集流体。
实用新型内容
随着电池行业的不断发展，出现了具有更佳性能的集流体，即，高分子与金属复合而成的复合集流体。复合集流体可以减小电池温升，降低热失控的发生风险，提高电池的安全性。但是，由于复合集流体包括由高分子材料形成的绝缘层，因此，复合集流体的极耳无法将电芯中的电流输出至电极端子，这就需要利用箔材(铝箔或铜箔)与复合集流体的极耳转接，以便将电芯中的电流输送出来。
本申请提供了一种二次电池集流体的加工设备，能够实现箔材与复合集流体的极耳的连接，以将电芯中的电流输送出来。
本申请提供了一种二次电池集流体的加工设备，包括：
箔材放卷辊；
复合集流体放卷辊；
焊接装置；
多个驱动辊；以及
收卷辊，
其中，所述箔材放卷辊和所述复合集流体放卷辊均设置于所述焊接装置的入料侧，所述焊接装置设置成将箔材焊接于复合集流体的局部，
各所述驱动辊分别设置于所述焊接装置的入料侧和出料侧，且线速度相等，各所述驱动辊设置成带动重叠后的箔材与复合集流体向下游输送，
所述收卷辊设置成收卷焊接后的所述箔材的复合集流体。
可选地，所述加工设备还包括同步传动装置，各所述驱动辊均与所述同步传动装置传动连接。
可选地，所述加工设备还包括多个从动辊，所述驱动辊与所述从动辊一一对应设置，所述驱动辊和所述从动辊之间供重叠后的箔材与复合集流体通过，所述驱动辊带动所述从动辊转动以共同输送箔材与复合集流体。
可选地，多个所述驱动辊中的至少两者沿水平方向排布，且所述焊接装置位于沿水平方向排布的两个所述驱动辊之间。
可选地，所述焊接装置设置成将所述箔材连续焊接于所述复合集流体的局部。
可选地，所述焊接装置设置成超声波滚动焊接装置，
所述超声波滚动焊接装置包括超声波焊头和砧座，所述超声波焊头和所述砧座在焊接过程中滚动接触。
可选地，所述加工设备还包括驱动装置，所述超声波焊头与所述砧座中的一者与所述驱动装置传动连接，以调节焊接时两者的接触力。
可选地，所述加工设备还包括将所述箔材与所述复合集流体中的一者压向另一者以使两者叠置的压辊，所述压辊设置在所述焊接装置的入料侧。
可选地，所述加工设备还包括用于纠正所述箔材与所述复合集流体位置偏移的纠偏装置，所述纠偏装置设置于所述压辊的入料侧。
可选地，所述加工设备还包括张力调节装置，所述张力调节装置活动设置以调节所述箔材与所述复合集流体的张力。
本申请提供的技术方案可以达到以下有益效果：
本申请提供了一种二次电流集流体的加工设备，其中，焊接装置的出料侧和入料侧分别设置有驱动辊，各驱动辊的线速度相等，焊接装置可以将箔材焊接于复合集流体的局部，使得箔材可以作为复合集流体的极耳使用，通过箔材的转接，使得电芯中的电流得以被输送出来。
应当理解的是，以上的一般描述和后文的细节描述仅是示例性的，并不能限制本申请。
附图说明
图1为本申请实施例提供的二次电池集流体的加工设备的示意图。
附图标记：
10-箔材放卷辊；
20-复合集流体放卷辊；
30-焊接装置；
302-超声波焊头；
304-砧座；
40-驱动辊；
50-收卷辊；
60-从动辊；
70-驱动装置；
80-压辊；
90-纠偏装置；
100-张力调节装置；
110-输送辊。
此处的附图被并入说明书中并构成本说明书的一部分，示出了符合本申请的实施例，并与说明书一起用于解释本申请的原理。
具体实施方式
下面通过具体的实施例并结合附图对本申请做进一步的详细描述。
需要注意的是，本申请实施例所描述的“上”、“下”、“左”、“右”等方位词是以附图所示的角度来进行描述的，不应理解为对本申请实施例的限定。此外，在上下文中，还需要理解的是，当提到一个元件连接在另一个元件“上”或者“下”时，其不仅能够直接连接在另一个元件“上”或者“下”，也可以通过中间元件间接连接在另一个元件“上”或者“下。
本申请提供了一种二次电池集流体的加工设备，该加工设备用于加工二次电池集流体，二次电池集流体可以作为极片基材使用。
具体地，如图1所示，该加工设备包括箔材放卷辊10、复合集流体放卷辊20、焊接装置30、多个驱动辊40以及收卷辊50。其中，箔材放卷辊10用于放卷箔材，复合集流体放卷辊20用于放卷复合集流体，其中，箔材放卷辊10和复合集流体放卷辊20均设置于焊接装置30的入料侧，焊接装置30设置成将箔材焊接于复合集流体的局部。
多个驱动辊40分别设置于焊接装置30的入料侧和出料侧，多个驱动辊40可以带动重叠后的箔材与复合集流体输送至焊接装置30，并且在焊接后将箔材与复合集流体输送至下游。
多个驱动辊40设置成线速度均相等，这样，在焊接前后，箔材和复合集流体的输送速度的差异减小，则箔材和复合集流体在焊接时速度的波动较小，焊接质量得以提高。
收卷辊50设置于该加工设备的流水线的末端，用于收卷焊接后的箔材和复合集流体，焊接后的箔材和复合集流体可以作为极片基材，其中，箔材可以用作极耳。
根据以上的描述，焊接装置30可以将箔材焊接于复合集流体的局部，使得箔材可以作为复合集流体的极耳使用，并通过箔材的转接，使得电芯中的电流得以被输送出来。
驱动辊40可以通过驱动机构例如电机驱动，一种实施例，每个驱动辊40配备一个电机。
本实施例中，为了简化结构，该加工设备还包括同步传动装置(图中未示出)，同步传动装置与各驱动辊40传动连接，以实现各驱动辊40的同步转动。这样，各驱动辊40的直径相等时，在同一个电机的带动下，各驱动辊40的线速度也趋于一致，且结构更加紧凑。
同步传动装置可以采用齿条、链条以及齿形带等，相应的，各驱动辊40需设置与之相配合的齿轮、链轮以及带轮等。
为了对箔材和复合集流体实现更加稳定的输送，该加工设备还可以包括多个从动辊60，从动辊60与驱动辊40一一对应设置，从动辊60和驱动辊40之间供箔材与复合集流体通过，从动辊60可以向箔材和复合集流体施加压力，并且在驱动辊40的带动下共同输送箔材和复合集流体，以减小箔材和复合集流体的速度差。
根据一个示例性的实施例，如图1所示，驱动辊40可以设置为两个，并且，两个驱动辊40沿水平方向排布，焊接装置30设置在两个驱动辊40之间，这样，在焊接装置30的入料侧和出料侧，箔材与复合集流体就可以沿着水平方向以恒定的速度输送，避免由于输送方向的改变而造成箔材与复合集流体之间相对错位，提高焊接质量。
当然，驱动辊40的数量不仅限于两个，还可以是更多个，此时，可以将分别设置于焊接装置30的入料侧和出料侧且与焊接装置30相邻的两个驱动辊40设置成沿水平方向排布。
需要说明的是，入料时需保证驱动辊40上有一定的包角，以增大走带的摩擦力而不至于打滑，箔材与复合集流体应紧贴于驱动辊40，不容易跑偏，使焊接的尺寸精度得以保证。
箔材与复合集流体可以采用激光焊接，即，焊接装置30为激光焊接装置，但不仅限于此。本实施例中，箔材与复合集流体采用超声波焊接。当箔材与复合集流体到达超声波焊接工位后，焊接装置可以通过振动向箔材与复合集流体施加作用力，箔材与复合集流体相互摩擦并熔合在一起。
超声波焊接可以有效穿透复合集流体中间的塑料层，将箔材分别与塑料层两侧的金属层熔合，以增加金属厚度，使得电芯中的电流能够可靠的从熔合部分输送出来。
另外，在焊接过程中，为了提高焊接效率，还可以将箔材连续地焊接于复合集流体。也就是说，箔材与复合集流体在输送的过程中即被焊接，并在两者上形成连续的焊印，输送过程无需停顿。
根据一种示例性的实施例，本申请设置焊接装置30为超声波滚动焊接装置。具体的，超声波滚动焊接装置包括超声波焊头302和砧座304，两者分别设置成圆柱体，以便两者可以相对转动，实现滚动接触。这样，在焊接过程中，箔材和复合集流体就可以连续不断地被输送至超声波焊头302和砧座304之间，并可以对箔材与复合集流体进行连续的超声波焊接。
应当理解的是，实现连续焊接的方式不仅限于上述所描述的，还有其它实施例可供选择，此处不作详细描述。
进一步，超声波焊头302的圆周面上还可以布设多个挤压焊齿(图中未示出)，挤压焊齿可以设置为锥齿结构，类似齿轮结构。砧座304可以做表面光滑处理，以减少焊接时对箔材和复合集流体的损伤。此时，超声波焊头302作为焊齿部分，砧座304作为无焊齿部分。
在焊接的过程中，挤压焊齿挤压箔材与复合集流体，并穿透复合集流体的塑料层，箔材在挤压焊齿的挤压力的作用下延展，分别与塑料层上下两侧的金属层熔合，从而可以将箔材与复合集流体更加充分的焊接在一起。
当然，挤压焊齿不仅限于设置在超声波焊头302的圆周面上，可选择的，挤压焊齿也可以设置在砧座304的圆周面上，相应的，超声波焊头302可以做表面光滑处理。在此情况下，砧座304作为焊齿部分，超声波焊头302作为无焊齿部分。
如图1所示，该加工设备还可以包括驱动装置70，超声波焊头302和砧座304中的一者可以与驱动装置70传动连接，以此可以调节超声波焊头302与砧座304接触时的接触力，保证焊接时箔材与复合集流体的熔合度，提高焊接质量。本实施例中，驱动装置70选用气缸，但不仅限于此。
容易理解的，箔材与复合集流体均为薄材，其强度不高且无法承受较大的撕扯力，因此，要求箔材与复合集流体在焊接时要保持相对位置固定，减小两者之间的速度差，否则焊接后将会出现裂纹，严重时产生断带无法连续生产。
本申请中，为了保证焊接质量，该加工设备还包括压辊80，压辊80设置在焊接装置30的入料侧，压辊80可以将箔材与复合集流体中的一者压向另一者，以使得两者在压辊80处重叠。其中，压辊80转动设置。
进一步，压辊80设置在驱动辊40的入料侧，这样，在输送至驱动辊40之前，箔材与复合集流体可以叠置在一起，从而进一步减小箔材与复合集流体的速度差。
较佳的，该加工设备还可以包括纠偏装置90，纠偏装置90设置在压辊80的入料侧，纠偏装置90用于纠正箔材相对于复合集流体的重叠位置，避免两者重叠时产生较大的位置偏移。
根据一个示例性的实施例，纠偏装置90可以设置成纠偏辊，箔材与复合集流体在输送的过程中包绕于纠偏辊，纠偏辊可以通过程序控制带动箔材和复合集流体在不同于输送方向的方向上做微量移动，以纠正箔材和复合集流体在输送过程中的偏移，使得叠置后的箔材与复合集流体能够在预设的位置处重叠，以满足重叠时的尺寸要求。
此外，还可以在收卷辊50的入料侧设置纠偏装置90，以纠正绕卷于收卷辊50的极片基材的偏移量。
放料过程中，还需对箔材和复合集流体的张力进行控制，因此，该加工设备还可以包括张力调节装置100，张力调节装置100可以设置为张力调节辊，张力调节辊活动设置于箔材和复合集流体的输送路径中，张力调节辊可以通过程序控制动作，从而可以达到调节张力的目的。
该加工设备还包括输送辊110，输送辊110可以改变箔材和复合集流体的输送方向，以便合理布置该加工设备的占用空间。
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 (10)

1.一种二次电池集流体的加工设备，其特征在于，包括：
箔材放卷辊；
复合集流体放卷辊；
焊接装置；
多个驱动辊；以及
收卷辊，
其中，所述箔材放卷辊和所述复合集流体放卷辊均设置于所述焊接装置的入料侧，所述焊接装置设置成将箔材焊接于复合集流体的局部，
各所述驱动辊分别设置于所述焊接装置的入料侧和出料侧，且线速度相等，各所述驱动辊设置成带动重叠后的箔材与复合集流体向下游输送，
所述收卷辊设置成收卷焊接后的所述箔材的复合集流体。
2.根据权利要求1所述的加工设备，其特征在于，所述加工设备还包括同步传动装置，各所述驱动辊均与所述同步传动装置传动连接。
3.根据权利要求1所述的加工设备，其特征在于，所述加工设备还包括多个从动辊，所述驱动辊与所述从动辊一一对应设置，所述驱动辊和所述从动辊之间供重叠后的箔材与复合集流体通过，所述驱动辊带动所述从动辊转动以共同输送箔材与复合集流体。
4.根据权利要求3所述的加工设备，其特征在于，多个所述驱动辊中的至少两者沿水平方向排布，且所述焊接装置位于沿水平方向排布的两个所述驱动辊之间。
5.根据权利要求1所述的加工设备，其特征在于，所述焊接装置设置成将所述箔材连续焊接于所述复合集流体的局部。
6.根据权利要求5所述的加工设备，其特征在于，所述焊接装置设置成超声波滚动焊接装置，
所述超声波滚动焊接装置包括超声波焊头和砧座，所述超声波焊头和所述砧座在焊接过程中滚动接触。
7.根据权利要求6所述的加工设备，其特征在于，所述加工设备还包括驱动装置，所述超声波焊头与所述砧座中的一者与所述驱动装置传动连接，以调节焊接时两者的接触力。
8.根据权利要求1-7任一项所述的加工设备，其特征在于，所述加工设备还包括将所述箔材与所述复合集流体中的一者压向另一者以使两者叠置的压辊，所述压辊设置在所述焊接装置的入料侧。
9.根据权利要求8所述的加工设备，其特征在于，所述加工设备还包括用于纠正所述箔材与所述复合集流体位置偏移的纠偏装置，所述纠偏装置设置于所述压辊的入料侧。
10.根据权利要求1-7任一项所述的加工设备，其特征在于，所述加工设备还包括张力调节装置，所述张力调节装置活动设置以调节所述箔材与所述复合集流体的张力。
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