CN117154314A - 一种电池包底护板及成型工艺 - Google Patents

一种电池包底护板及成型工艺 Download PDF

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Publication number
CN117154314A
CN117154314A CN202311056792.XA CN202311056792A CN117154314A CN 117154314 A CN117154314 A CN 117154314A CN 202311056792 A CN202311056792 A CN 202311056792A CN 117154314 A CN117154314 A CN 117154314A
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China
Prior art keywords
glass fiber
layer
fiber layer
battery pack
layer stack
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CN202311056792.XA
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丁江平
吕金泽
隋光
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Minth Automotive Technology Research and Development Co Ltd
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Minth Automotive Technology Research and Development Co Ltd
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Priority to CN202311056792.XA priority Critical patent/CN117154314A/zh
Publication of CN117154314A publication Critical patent/CN117154314A/zh
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D7/00—Producing flat articles, e.g. films or sheets
    • B29D7/01—Films or sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00—Shaping 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
    • B29C51/08—Deep drawing or matched-mould forming, i.e. using mechanical means only
    • B29C51/082—Deep drawing or matched-mould forming, i.e. using mechanical means only by shaping between complementary mould parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/45—Joining of substantially the whole surface of the articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
    • B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
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    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
    • B29C70/688—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks the inserts being meshes or lattices
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Abstract

本发明提供了一种电池包底护板及成型工艺，属于电池包技术领域，包括：电池包防护板板材，且该电池包防护板板材由上至下依次包括上面层堆栈、PP蜂窝层、钢板以及下面层堆栈，且上面层堆栈至少包括两层上玻璃纤维层，下面层堆栈至少包括两层下玻璃纤维层，并在两层下玻璃纤维层之间设置有金属网，其中，两层上玻璃纤维层中热塑性复合材料片材铺设角度相同，两层下玻璃纤维层中热塑性复合材料片材铺设角度相同。本发明通过在下面层堆栈中添加金属网，以此提高下玻璃纤维层的强度，使得成型后的电池包底护板具有较强的抗冲击力和抗刮蹭性能。

Description

一种电池包底护板及成型工艺
技术领域
本发明属于电池包技术领域，涉及一种电池包底护板及成型工艺。
背景技术
为了对汽车底盘进行保护，一般是安装有汽车底盘防护板。对于电动车辆来说，其动力电池包一般放置在车辆底盘的托盘上，为了防止电池收到外力损伤，托盘底部需要加设防护板。此时，汽车底盘防护板也是托盘底部防护板。
现有技术中，有些防护板直接采用钢板，但钢板基本对托盘基本没有缓冲作用，加上车辆颠簸，反而容易对托盘等造成损伤。而且厚度太薄的钢板强度低，厚度太厚的钢板重量大，也不适于用于电动车辆上。有些防护板采用铝合金，但铝合金的成本较高，还有些防护板采用上下层面为连续玻纤增强热塑性复合材料，芯材为PP蜂窝和钢板所组成的板材结构，但是在该种结构中，上下层面与芯层之间的结合力不足，冲击或者刮蹭后，容易分层。
发明内容
本发明的目的是针对现有的技术存在上述问题，提出了一种强度高、成本低、不易分层，以及具有较强抗冲击、抗刮蹭性能的电池包底护板。
本发明的目的可通过下列技术方案来实现：一种电池包底护板，包括：
电池包防护板板材，且该电池包防护板板材由上至下依次包括上面层堆栈、PP蜂窝层、钢板以及下面层堆栈，且上面层堆栈至少包括两层上玻璃纤维层，下面层堆栈至少包括两层下玻璃纤维层，并在两层下玻璃纤维层之间设置有金属网。
在上述的一种电池包底护板中，当上面层堆栈中的玻璃纤维层和下面层堆栈中的玻璃纤维层均为两层时，两层上玻璃纤维层中热塑性复合材料片材铺设角度相同，两层下玻璃纤维层中热塑性复合材料片材铺设角度相同；当上面层堆栈中的玻璃纤维层层数为四层时，由上至下依次为第一上玻璃纤维层、第二上玻璃纤维层、第三上玻璃纤维层以及第四上玻璃纤维层，其中，第一上玻璃纤维层中热塑性复合材料片材铺设角度与第四上玻璃纤维层中热塑性复合材料片材铺设角度相同；第二上玻璃纤维层中热塑性复合材料片材铺设角度与第三上玻璃纤维层中热塑性复合材料片材铺设角度相同；当下面层堆栈中的玻璃纤维层层数为四层时，由上至下依次设置有第一下玻璃纤维层、第二下玻璃纤维层、第三下玻璃纤维层以及第四下玻璃纤维层，且金属网位于第二下玻璃纤维层与第三下玻璃纤维层之间，其中，第一下玻璃纤维层中热塑性复合材料片材铺设角度与第四下玻璃纤维层中热塑性复合材料片材铺设角度相同；第二下玻璃纤维层中热塑性复合材料片材铺设角度与第三下玻璃纤维层中热塑性复合材料片材铺设角度相同。
在上述的一种电池包底护板中，在第二上玻璃纤维层与第三上玻璃纤维层之间设置有金属网。
在上述的一种电池包底护板中，第一上玻璃纤维层、第二上玻璃纤维层、第三上玻璃纤维层以及第四上玻璃纤维层由上至下依次叠加并通过加热加压的方式热融为一体，形成上面层堆栈；第一下玻璃纤维层、第二下玻璃纤维层、金属网、第三下玻璃纤维层以及第四下玻璃纤维层由上至下依次叠加并通过加热加压的方式形成下面层堆栈，其中，在钢板两侧覆盖胶膜，并与PP蜂窝层叠加设置，形成芯层堆栈。
在上述的一种电池包底护板中，上面层堆栈、芯层堆栈以及下面层堆栈依次叠加并通过加热加压的方式热融为一体，形成电池包防护板板材。
在上述的一种电池包底护板中，玻璃纤维层为单向带或者织物，且面重200GSM-800GSM；金属网为钢网或者铝网，且表面为平纹或者斜纹或者席型编织，目数为100-3500目；PP蜂窝层的密度为50-150。
在上述的一种电池包底护板中，当上面层堆栈中的玻璃纤维层层数和下面层堆栈中的玻璃纤维层层数均为两层时，两层上玻璃纤维层中热塑性复合材料片材铺设角度为0°或者90°，两层下玻璃纤维层中热塑性复合材料片材铺设角度为0°或者90°；当上面层堆栈中的玻璃纤维层层数和下面层堆栈中的玻璃纤维层层数均为四层时，第一上玻璃纤维层、第二上玻璃纤维层、第三上玻璃纤维层以及第四上玻璃纤维层中热塑性复合材料片材铺设角度依次为0°、90°、90°、0°，或者依次为90°、0°、0°、90°；第一下玻璃纤维层、第二下玻璃纤维层、第三下玻璃纤维层以及第四下玻璃纤维层中热塑性复合材料片材铺设角度依次为0°、90°、90°、0°，或者依次为90°、0°、0°、90°
本发明还提供一种电池包底护板的成型工艺，包括步骤：
S1：将玻璃纤维层按照角度层叠铺设，并将金属网夹持于对应角度的玻璃纤维层之间，并通过加热加压的方式，使之热融为一体，形成面层堆栈，分别为上面层堆栈和下面层堆栈；
S2：将钢板的两侧覆盖胶膜，并与PP蜂窝层叠加放置，形成芯层堆栈；
S3：将上面层堆栈、芯层堆栈以及下面层堆栈依次叠加放置，并通过加热加压的方式，使之热融为一体，形成电池包防护板板材；
S4：将电池包防护板板材放入加热工装中，进行局部加热；
S5：将加热后的电池包防护板板材放入成型模具中，并压制成型；
S6：将压制成型后的电池包防护板板材冷却，并进行切割制孔，形成法兰边孔，其中，在法兰边孔上增加钢套，形成电池包防护板。
在上述的一种电池包底护板的成型工艺中，步骤S1中的玻璃纤维层采用300GSM的连续玻纤单向带，并按照0°、90°、90°、0°进行铺设，并将平纹编织200目，孔径0.35的钢网布置于两个90°铺层中间，其中钢网距离玻纤层的边缘为80mm。
在上述的一种电池包底护板的成型工艺中，步骤S2中的钢板选用0.77mmDP90钢板，PP蜂窝层的密度选为115。
与现有技术相比，本发明的有益效果：
本发明提供的一种电池包底护板，通过在下面层堆栈中添加金属网，以此提高下玻璃纤维层的强度，使得成型后的电池包底护板具有较强的抗冲击力和抗刮蹭性能。
附图说明
图1是本发明一种电池包底护板的结构示意图。
图2是本发明一较佳实施例中电池防护板板材的剖视图。
图3是本发明一较佳实施例中上面层堆栈的剖视图。
图4是本发明一较佳实施例中下面层堆栈的剖视图。
图中，10、电池包防护板板材；11、上面层堆栈；111、第一上玻璃纤维层；112、第二上玻璃纤维层；113、第三上玻璃纤维层；114、第四上玻璃纤维层；12、PP蜂窝层；13、钢板；14、下面层堆栈；141、第一下玻璃纤维层；142、第二下玻璃纤维层；143、金属网；144、第三下玻璃纤维层；145、第四下玻璃纤维层；15、钢网区域；16、热压区域；161、法兰边孔。
具体实施方式
以下是本发明的具体实施例并结合附图，对本发明的技术方案作进一步的描述，但本发明并不限于这些实施例。
需要说明，本发明实施例中所有方向性指示(诸如上、下、左、右、前、后……)仅用于解释在某一特定姿态(如附图所示)下各部件之间的相对位置关系、运动情况等，如果该特定姿态发生改变时，则该方向性指示也相应地随之改变。
如图1至图4所示，本发明提供的一种电池包底护板，包括：电池包防护板板材10，且该电池包防护板板材10由上至下依次包括上面层堆栈11、PP蜂窝层12、钢板13以及下面层堆栈14，且上面层堆栈11由上至下依次设置有第一上玻璃纤维层111、第二上玻璃纤维层112、第三上玻璃纤维层113以及第四上玻璃纤维层114，下面层堆栈14由上至下依次设置有第一下玻璃纤维层141、第二下玻璃纤维层142、金属网143、第三下玻璃纤维层144以及第四下玻璃纤维层145，其中，第一上玻璃纤维层111、第四上玻璃纤维层114、第一下玻璃纤维层141以及第四下玻璃纤维层145为0°方向玻璃纤维层，第二上玻璃纤维层112、第三上玻璃纤维层113、第二下玻璃纤维层142以及第四下玻璃纤维层145为90°方向玻璃纤维层。
本发明提供的一种电池包底护板，通过在下面层堆栈14中添加金属网143，以此提高下玻璃纤维层的强度，使得成型后的电池包底护板具有较强的抗冲击力和抗刮蹭性能。
值得一提的是，为了进一步提高电池包防护板的性能，可在第二上玻璃纤维层112与第三上玻璃纤维层113之间设置金属网143，使得上面层堆栈11的组成结构与下面层堆栈14的组成结构相同，从而实现上面层堆栈11与下面层堆栈14之间的通用。
另外，本实施例中的玻璃纤维层不限于单向带或者织物，面重200GSM-800GSM；金属网143可以为钢网或者铝网，且表面为平纹或者斜纹或者席型编织，目数为100-3500目，材质不限于201/202/304/430等；PP蜂窝层12的密度为50-150；钢板13不限于DP590，DP780等。
其中，0°方向玻璃纤维层指的是该层玻璃纤维层中热塑性复合材料片材铺设角度为0°；90°方向玻璃纤维层指的是该层玻璃纤维层中热塑性复合材料片材铺设角度为90°。
进一步优选地，第一上玻璃纤维层111、第二上玻璃纤维层112、第三上玻璃纤维层113以及第四上玻璃纤维层114由上至下依次叠加并通过加热加压的方式热融为一体，形成上面层堆栈11；第一下玻璃纤维层141、第二下玻璃纤维层142、金属网143、第三下玻璃纤维层144以及第四下玻璃纤维层145由上至下依次叠加并通过加热加压的方式形成下面层堆栈14，其中，在钢板13两侧覆盖胶膜，并与PP蜂窝层12叠加设置，形成芯层堆栈。
值得一提的是，在成型电池包防护板板材10时，由上至下将上面层堆栈11、芯层堆栈以及下面层堆栈14依次叠加并通过加热加压的方式热融为一体，从而形成电池包防护板板材10。
在本实施例中，上面层堆栈11、芯层堆栈以及下面层堆栈14热融为一体，从而提高整个电池包防护板板材10的结合性，不易分层，进而提高整个电池包防护板的可靠性。
优选地，电池包防护板的中部形成钢网区域15，边缘形成热压区域16，且在热压区域16上设置法兰边孔161。
本发明还提供一种电池包防护板的成型工艺，包括步骤：
S1：将玻璃纤维层按照角度层叠铺设，并将金属网143夹持于对应角度的玻璃纤维层之间，并通过加热加压的方式，使之热融为一体，形成面层堆栈，分别为上面层堆栈11和下面层堆栈14；
S2：将钢板13的两侧覆盖胶膜，并与PP蜂窝层12叠加放置，形成芯层堆栈；
S3：将上面层堆栈11、芯层堆栈以及下面层堆栈14依次叠加放置，并通过加热加压的方式，使之热融为一体，形成电池包防护板板材10；
S4：将电池包防护板板材10放入加热工装中，进行局部加热；
S5：将加热后的电池包防护板板材10放入成型模具中，并压制成型；
S6：将压制成型后的电池包防护板板材10冷却，并进行切割制孔，形成法兰边孔161，其中，在法兰边孔161上增加钢套，形成电池包防护板。
进一步优选地，步骤S1中的玻璃纤维层采用300GSM的连续玻纤单向带，并按照0°、90°、90°、0°进行铺设，并将平纹编织200目，孔径0.35的钢网布置于两个90°铺层中间，其中钢网距离玻纤层的边缘为80mm。
进一步优选地，步骤S2中的钢板13选用0.77mmDP90钢板13，PP蜂窝层12的密度选为115。
本发明提供的一种电池包防护板的成型工艺，成型后的产品强度较高，刚度较大，且性能优异。
需要说明的是，在本发明中如涉及“第一”、“第二”、“一”等的描述仅用于描述目的，而不能理解为指示或暗示其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地包括至少一个该特征。在本发明的描述中，“多个”的含义是至少两个，例如两个，三个等，除非另有明确具体的限定。术语“连接”、“固定”等应做广义理解，例如，“固定”可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系，除非另有明确的限定。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本发明中的具体含义。
另外，本发明各个实施例之间的技术方案可以相互结合，但是必须是以本领域普通技术人员能够实现为基础，当技术方案的结合出现相互矛盾或无法实现时应当认为这种技术方案的结合不存在，也不在本发明要求的保护范围之内。
本文中所描述的具体实施例仅仅是对本发明精神作举例说明。本发明所属技术领域的技术人员可以对所描述的具体实施例做各种各样的修改或补充或采用类似的方式替代，但并不会偏离本发明的精神或者超越所附权利要求书所定义的范围。

Claims (10)

1.一种电池包底护板，其特征在于，包括：电池包防护板板材，且该电池包防护板板材由上至下依次包括上面层堆栈、PP蜂窝层、钢板以及下面层堆栈，且上面层堆栈至少包括两层上玻璃纤维层，下面层堆栈至少包括两层下玻璃纤维层，并在两层下玻璃纤维层之间设置有金属网。
2.根据权利要求1所述的一种电池包底护板，其特征在于，当上面层堆栈中的玻璃纤维层和下面层堆栈中的玻璃纤维层均为两层时，两层上玻璃纤维层中热塑性复合材料片材铺设角度相同，两层下玻璃纤维层中热塑性复合材料片材铺设角度相同；当上面层堆栈中的玻璃纤维层层数为四层时，由上至下依次为第一上玻璃纤维层、第二上玻璃纤维层、第三上玻璃纤维层以及第四上玻璃纤维层，其中，第一上玻璃纤维层中热塑性复合材料片材铺设角度与第四上玻璃纤维层中热塑性复合材料片材铺设角度相同；第二上玻璃纤维层中热塑性复合材料片材铺设角度与第三上玻璃纤维层中热塑性复合材料片材铺设角度相同；当下面层堆栈中的玻璃纤维层层数为四层时，由上至下依次设置有第一下玻璃纤维层、第二下玻璃纤维层、第三下玻璃纤维层以及第四下玻璃纤维层，且金属网位于第二下玻璃纤维层与第三下玻璃纤维层之间，其中，第一下玻璃纤维层中热塑性复合材料片材铺设角度与第四下玻璃纤维层中热塑性复合材料片材铺设角度相同；第二下玻璃纤维层中热塑性复合材料片材铺设角度与第三下玻璃纤维层中热塑性复合材料片材铺设角度相同。
3.根据权利要求2所述的一种电池包底护板，其特征在于，在第二上玻璃纤维层与第三上玻璃纤维层之间设置有金属网。
4.根据权利要求2所述的一种电池包底护板，其特征在于，第一上玻璃纤维层、第二上玻璃纤维层、第三上玻璃纤维层以及第四上玻璃纤维层由上至下依次叠加并通过加热加压的方式热融为一体，形成上面层堆栈；第一下玻璃纤维层、第二下玻璃纤维层、金属网、第三下玻璃纤维层以及第四下玻璃纤维层由上至下依次叠加并通过加热加压的方式形成下面层堆栈，其中，在钢板两侧覆盖胶膜，并与PP蜂窝层叠加设置，形成芯层堆栈。
5.根据权利要求4所述的一种电池包底护板，其特征在于，上面层堆栈、芯层堆栈以及下面层堆栈依次叠加并通过加热加压的方式热融为一体，形成电池包防护板板材。
6.根据权利要求1所述的一种电池包底护板，其特征在于，玻璃纤维层为单向带或者织物，且面重200GSM-800GSM；金属网为钢网或者铝网，且表面为平纹或者斜纹或者席型编织，目数为100-3500目；PP蜂窝层的密度为50-150。
7.根据权利要求2所述的一种电池包底护板，其特征在于，当上面层堆栈中的玻璃纤维层层数和下面层堆栈中的玻璃纤维层层数均为两层时，两层上玻璃纤维层中热塑性复合材料片材铺设角度为0°或者90°，两层下玻璃纤维层中热塑性复合材料片材铺设角度为0°或者90°；当上面层堆栈中的玻璃纤维层层数和下面层堆栈中的玻璃纤维层层数均为四层时，第一上玻璃纤维层、第二上玻璃纤维层、第三上玻璃纤维层以及第四上玻璃纤维层中热塑性复合材料片材铺设角度依次为0°、90°、90°、0°，或者依次为90°、0°、0°、90°；第一下玻璃纤维层、第二下玻璃纤维层、第三下玻璃纤维层以及第四下玻璃纤维层中热塑性复合材料片材铺设角度依次为0°、90°、90°、0°，或者依次为90°、0°、0°、90°。
8.一种电池包底护板的成型工艺，其特征在于，包括步骤：
S1：将玻璃纤维层按照角度层叠铺设，并将金属网夹持于对应角度的玻璃纤维层之间，并通过加热加压的方式，使之热融为一体，形成面层堆栈，分别为上面层堆栈和下面层堆栈；
S2：将钢板的两侧覆盖胶膜，并与PP蜂窝层叠加放置，形成芯层堆栈；
S3：将上面层堆栈、芯层堆栈以及下面层堆栈依次叠加放置，并通过加热加压的方式，使之热融为一体，形成电池包防护板板材；
S4：将电池包防护板板材放入加热工装中，进行局部加热；
S5：将加热后的电池包防护板板材放入成型模具中，并压制成型；
S6：将压制成型后的电池包防护板板材冷却，并进行切割制孔，形成法兰边孔，其中，在法兰边孔上增加钢套，形成电池包防护板。
9.根据权利要求6所述的一种电池包底护板的成型工艺，其特征在于，步骤S1中的玻璃纤维层采用300GSM的连续玻纤单向带，并按照0°、90°、90°、0°进行铺设，并将平纹编织200目，孔径0.35的钢网布置于两个90°铺层中间，其中钢网距离玻纤层的边缘为80mm。
10.根据权利要求6所述的一种电池包底护板的成型工艺，其特征在于，步骤S2中的钢板选用0.77mmDP90钢板，PP蜂窝层的密度选为115。
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