CN115556437A - 一种电池包用的底护板及电池包 - Google Patents

一种电池包用的底护板及电池包 Download PDF

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CN115556437A
CN115556437A CN202211223403.3A CN202211223403A CN115556437A CN 115556437 A CN115556437 A CN 115556437A CN 202211223403 A CN202211223403 A CN 202211223403A CN 115556437 A CN115556437 A CN 115556437A
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metal wire
unit
metal
battery pack
plate
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CN115556437B (zh
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郑琳
刘勇
程国阳
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Shanghai Lanjun New Energy Technology Co Ltd
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Shanghai Lanjun New Energy Technology Co Ltd
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    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/02—Layer formed of wires, e.g. mesh
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
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    • B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
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    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • B60L50/66—Arrangements of batteries
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    • H01—ELECTRIC ELEMENTS
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    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
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    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
    • H01M50/24—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries from their environment, e.g. from corrosion
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    • H01—ELECTRIC ELEMENTS
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    • 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
    • H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
    • H01M50/242—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries against vibrations, collision impact or swelling
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    • H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
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Abstract

本发明提供了一种电池包用的底护板及电池包，所述的底护板包括金属丝单元和非金属材料单元；所述非金属材料单元用于包裹所述金属丝单元，并与所述金属丝单元复合为一体结构；使得金属的强度和非金属材料的密度小且有一定弹性能力的性能有效地结合起来，可以有效地降低底护板的重量，其强度又能满足底部碎石及石块的冲击。

Description

一种电池包用的底护板及电池包
技术领域
本发明涉及电池包技术领域，尤其涉及一种电池包用的底护板及电池包。
背景技术
电池包置于电动汽车底部之下，在汽车行驶过程中，经常会受到地下飞溅的碎石冲击，或者被较高的石块等异物磕碰，从而导致电池包底壳破裂，甚至电池变形等安全风险。
现有技术一般在电池包底部加一块钢板，结合PVC涂层或一块复合材料作为底部防护板进行一定的防护；钢板结合PVC涂层的方案重量较重，成本较高且没有较好的缓冲性能；复合材料底板强度略低，重量优势不明显，且成本也较高。
发明内容
为了解决现有技术中的问题，本发明提供了一种电池包用的底护板及电池包，具体是：
第一方面提供一种电池包用的底护板，
所述的底护板包括金属丝单元和非金属材料单元，所述非金属材料单元的密度小于所述金属丝单元的密度；
所述非金属材料单元用于包裹所述金属丝单元，并与所述金属丝单元复合为一体结构。
进一步地，所述金属丝层单元由横向排布的金属丝和纵向排布的金属丝层交错布置而成；其中，所述横向排布的金属丝层和纵向排布的金属丝层内任意相邻的两根金属丝沿横向或纵向的间距为5～50mm。
进一步地，所述横向排布的金属丝层和纵向排布的金属丝层之间的固定连接方式选自捆绑、焊接和粘接中的一种或两种以上的组合。
进一步地，所述金属丝单元体积的70％以上包裹在非金属材料单元内。
进一步地，所述金属丝单元中的金属丝呈平直、平面弯曲或立体弯曲结构；
所述金属丝单元中的金属丝的截面为圆形、椭圆、方形或菱形，金属丝的截面积在0.03～1mm^2之间。
进一步地，所述金属丝单元中的金属丝为钢合金或铝合金；
所述非金属材料单元中的材料选自塑胶、橡胶、树脂或纤维复合材料中的一种或两种以上组合。
进一步地，所述非金属材料单元与所述金属丝单元经模压或注塑工艺复合。
进一步地，所述底护板的厚度为1-10mm。
进一步地，所述金属丝单元为单层的金属丝网。
第二方面提供一种电池包，所述电池包包括电池组、电池箱体，以及第一方面所述的底护板；
所述底护板还具有第一表面和第二表面，所述第一表面位于所述底护板远离所述电池组的一侧表面，所述第二表面位于所述底护板靠近所述电池组的一侧表面；
所述底护板的第一表面至第二表面的方向为所述底护板的厚度方向，由所述底护板厚度方向的中轴线所在的横截面至所述底护板的第一表面设置有一层以上的第一金属丝层，所述第一金属丝层的全部被包裹于所述非金属材料单元内。
进一步地，由所述底护板厚度方向的中轴线所在的横截面至所述底护板的第二表面设置有一层以上的第二金属丝层，所述第二金属丝层的至少一部分被包裹于所述非金属材料单元内。
本发明提供的电池包用底护板及电池包具有的有益效果是：
本发明利用金属丝单元高密度、高强度的特点，非金属丝层低密度、强度低韧性好的特点，利用非金属材料单元包裹所述金属丝层单元，并与所述金属丝层单元复合为一体结构，使得金属的强度和非金属材料的密度小且有一定弹性能力的性能有效地结合起来，可以有效地降低底护板的重量，又能满足底部碎石及石块的冲击；本发明的制作过程可以采用模压、注塑等简单高效的工艺，与金属底部对比，无需另外喷涂PVC涂层，有效地降低了成本。
附图说明
通过阅读下文优选实施方式的详细描述，各种其他的优点和益处对于本领域普通技术人员将变得清楚明了。附图仅用于示出优选实施方式的目的，而并不认为是对本发明的限制。而且在整个附图中，用相同的参考符号表示相同的部件。在附图中：
图1为底护板的一种结构示意图；
图2为底护板的另一种结构示意图；
图3为图2在A处的放大示意图；
图4(a)为底护板俯视图；
图4(b)为图4(a)中沿着B-B线得到的剖视图；
图4(c)为图4(b)中C处对应的一种底护板剖视图放大示意图；
图4(d)为图4(b)中C处对应的另一种底护板剖视图放大示意图；
图5为一种电池包示意图。
具体实施方式
现将详细参考本申请的实施例，在图中说明本申请的实施例的一个或多个实例。每个实例是为了解释本申请而提供，而非限制本申请。实际上，所属领域的技术人员将清楚，在不脱离本申请的范围或精神的情况下可在本申请中进行各种修改和变化。举例来说，说明或描述为一个实施例的一部分的特征可与另一实施例一起使用以产生再一实施例。因此，希望本申请涵盖此类修改和变化，所述修改和变化处于所附权利要求书及其等效物的范围内。如本说明书中所使用，术语“第一”、“第二”等可互换使用以区分一部件与另一部件而并非意图表示各个部件的位置或重要性。如说明书中所使用，除非上下文另外明确指出，否则术语“一”，“一个”、“该”和“所述”旨在表示存在一个或多个元件。术语“包括”，“包括”和“具有”旨在是包括性的，并且意味着除列出的要素外可能还有其他要素。其中在所有附图中相同的数字表示相同的元件，下面结合具体的实施方式对本发明做进一步的解释说明。
本实施例提供了一种电池包用的底护板，所述的底护板包括金属丝单元和非金属材料单元，所述非金属材料单元的密度小于所述金属丝单元的密度；所述非金属材料单元用于包裹所述金属丝单元，并与所述金属丝单元复合为一体结构。。
对于非金属材料单元包裹金属丝单元，一种可行的实施方式中，所述金属丝单元体积的70％以上包裹在非金属材料单元内，比如80％的体积被包裹。
如图1-2所示，图1为底护板的一种结构示意图，其中包括非金属材料单元 2和一层金属丝层1，图2为底护板的另一种结构示意图，其中包括非金属材料和两层金属丝层，两层金属丝层也就是上层金属丝层11和下层金属丝层12，上下两层金属丝层相邻；优选的分别位于非金属材料单元的两侧，金属丝层位于非金属材料两侧的方式，使得整体刚性更好。
一种可行的实施方式中，每层金属丝单元由横向排布的金属丝层和纵向排布的金属丝层交错布置而成；其中，所述横向排布的金属丝层和纵向排布的金属丝层内任意相邻的两根金属丝沿横向或纵向的间距为5～50mm。
一种可行的实施方式中，所述金属丝单元为单层的金属丝网；优选的是所述单层的金属丝网为钢板网或金属扩张网。
如图3所示，图3为图2在A点的放大示意图，其中的横向金属丝E和纵向金属丝F交错布置。
给予说明的是，交错布置方式不仅限于图3所示的垂直的横向和纵向，还可以是交错成其他角度的布置方式，只要两层网状金属丝层的交错设置，上述均在本实施例的范围之内。
一种可行的实施方式中，所述横向排布的金属丝层和纵向排布的金属丝层之间的固定连接方式选自捆绑、焊接和粘接中的一种或两种以上的组合。
一种可行的实施方式中，所述金属丝单元中的金属丝呈平直、平面弯曲或立体弯曲结构；
所述金属丝单元中的金属丝的截面为圆形、椭圆、方形或菱形，金属丝的截面积在0.03～1mm^2之间。
一种可行的实施方式中，所述金属丝单元中的金属丝为钢合金或铝合金；其中，若所述金属丝为铝合金，则其密度为2.63～2.85g/cm^3；所述非金属材料单元中的材料选自塑胶、橡胶、树脂或纤维复合材料中的一种或两种以上组合，其中非金属材料单元材料的密度小于2.63g/cm^3。
一种可行的实施方式中，所述非金属材料单元与所述金属丝单元单元经模压或注塑工艺复合。
一种可行的实施方式中，所述底护板的厚度为1-10mm。
其中，金属丝单元预嵌入在注塑模、模压等塑胶、树脂、复合材料等成型工艺模具内，通过注塑、模压等工艺将非金属材料填充满模具，从而将金属丝包裹起来；金属丝的间距是必要的，保证非金属材料能充分包裹住金属丝；金属丝的间距根据底护板尺寸，底护抗冲击要求，金属丝的直径以及对轻量化的要求匹配最合适的尺寸。
并且给予说明的是，上述连接方式、截面形状、金属丝材料、非金属丝材料，均不限于上述给出的方式，本领域技术人员能够想到的其他可替换方式、形状或材料均属于本实施例的范围。
本实施例提供一种电池包，所述电池包包括电池箱体4、电池组5，以及第一方面所述的底护板3，如图5所示；
所述底护板3还具有第一表面31和第二表面32，所述第一表面位于所述底护板远离所述电池组的一侧表面，所述第二表面位于所述底护板靠近所述电池组的一侧表面；
所述底护板的第一表面31至第二表面32的方向为所述底护板的厚度方向，由所述底护板厚度方向的中轴线D所在的横截面至所述底护板的第一表面31设置有一层以上的第一金属丝层，所述第一金属丝层全部被包裹于所述非金属材料单元内所述第一金属丝层全部被包裹于所述非金属材料单元内，从而保证电池包底护板底面的平整性，从而保障NVH(汽车行驶时经由底护板传来的噪声小)性能。
图4(a)为底护板3俯视图；图4(b)为图4(a)中沿着B-B得到的剖视图，其中C处为剖视图上的一区域；图4(c)为图4(b)对应的一种底护板剖视图，金属丝单元被非金属材料包裹，其中包括金属丝层1和金属丝层2组成的金属丝单元，以及非金属材料单元；图4(d)为图4(b)对应的另一种底护板剖视图，金属丝单元被非金属材料单元包裹，其中包括双层金属丝(上层金属丝层和下层金属丝层)和非金属材料单元。
进一步地，由所述底护板厚度方向中轴线D所在的横截面至所述底护板的第二表面设置有一层以上的第二金属丝层；也就是说，第二金属丝层的一部分金属丝可以突出于底护板的第二表面。
上述的第一表面31和第二表面32，比如图4(d)，图中左侧的表面可以为第一表面31，下层金属丝层3a的全部被包裹在非金属材料内；右侧的表面可以为第二表面32，上层金属丝层3b的至少部分乃至全部被包裹在非金属材料内 (上层金属丝层的部分被包裹在非金属材料内未图示)。
所述的底护板厚度为1-10mm，优选的厚度在1-4mm。
本发明提供的电池包用底护板及电池包具有的有益效果是：
本发明利用非金属材料单元包裹所述金属丝单元，并与所述金属丝单元复合为一体结构，使得金属的强度和非金属材料的密度小且有一定弹性能力的性能有效地结合起来，可以有效地降低底护板的重量，又能满足底部碎石及石块的冲击；本发明的制作过程可以采用模压、注塑等简单高效的工艺，与金属底部对比，无需另外喷涂PVC涂层，有效地降低了成本。
通过合适的匹配选择，在相同抗冲击能力下，与传统的钢底护板相比，重量可以轻25％以上，与高强度复合材料底护板对比，轻20％以上；外传统的电池包钢底护板NVH性能差，行驶噪音大；而本发明的底护板NVH性能好。
以上所述为本发明的优选实施方式，对于本领域的技术人员而言，基于本发明公开的技术方案和发明实质，还可以做出其它的变形和改进，但这些基于本发明的变形和改进，均应涵盖于本发明的保护范围。本说明书使用实施例来公开本申请，包括最佳实施例，并且还使所属领域的技术人员能够实践本申请，包括制造和使用任何装置或系统以及执行任何所并入的方法。本申请的可获专利的范围由权利要求书限定，且可包括所属领域的技术人员所想到的其它实施例。如果此类其它实施例包括并非不同于权利要求书的字面语言的结构要素，或如果它们包括与权利要求书的字面语言无实质差异的等效结构要素，那么它们既定在权利要求范围内。

Claims (10)

1.一种电池包用的底护板，其特征在于：
所述的底护板包括金属丝单元和非金属材料单元，所述非金属材料单元的密度小于所述金属丝单元的密度；
所述非金属材料单元用于包裹所述金属丝单元，并与所述金属丝单元复合为一体结构。
2.根据权利要求1所述的底护板，其特征在于：所述金属丝单元由横向排布的金属丝层和纵向排布的金属丝层交错布置而成；
其中，所述横向排布的金属丝层和纵向排布的金属丝层内任意相邻的两根金属丝沿横向或纵向的间距为5~50mm。
3.根据权利要求2所述的底护板，其特征在于：所述横向排布的金属丝层和纵向排布的金属丝层之间的固定连接方式选自捆绑、焊接和粘接中的一种或两种以上的组合。
4.根据权利要求1所述的底护板，其特征在于：所述金属丝单元体积的70%以上包裹在非金属材料单元内。
5.根据权利要求1所述的底护板，其特征在于：所述金属丝单元中的金属丝呈平直、平面弯曲或立体弯曲结构；
所述金属丝单元中的金属丝的截面为圆形、椭圆、方形或菱形，金属丝的截面积在0.03~1 mm^2之间。
6.根据权利要求1所述的底护板，其特征在于：所述金属丝单元中的金属丝为钢合金或铝合金；
所述非金属材料单元中的材料选自塑胶、橡胶、树脂或纤维复合材料中的一种或两种以上组合。
7.根据权利要求1所述的底护板，其特征在于：所述非金属材料单元与所述金属丝单元经模压或注塑工艺复合。
8.根据权利要求1所述的底护板，其特征在于：所述金属丝单元为单层的金属丝网。
9.一种电池包，其特征在于：所述电池包包括电池箱体、电池组，以及权利要求1-8任一项所述的底护板；
所述底护板还具有第一表面和第二表面，所述第一表面位于所述底护板远离所述电池组的一侧表面，所述第二表面位于所述底护板靠近所述电池组的一侧表面；
所述底护板的第一表面至第二表面的方向为所述底护板的厚度方向，由所述底护板厚度方向的中轴线所在的横截面至所述底护板的第一表面设置有一层以上的第一金属丝层，所述第一金属丝层的全部被包裹于所述非金属材料单元内。
10.根据权利要求9所述的电池包，其特征在于：
由所述底护板厚度方向的中轴线所在的横截面至所述底护板的第二表面设置有一层以上的第二金属丝层，所述第二金属丝层的至少一部分被包裹于所述非金属材料单元内。
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