18650 battery case 21700 battery case

20241224 Update:

The printing configuration for the 21700 battery pack standard version has been integrated into that of the 18650 battery standard version

20240721 Update:

Feedback indicated that the perimeter clasp was somewhat loose, possibly due to material shrinkage After testing various dimensions, a revised version with a tighter clasp has been uploaded for preferential download

(20240721更新：

有人反馈四周卡扣有点松，可能与材料收缩有关，验证了几组不同的尺寸，重新上传了紧密卡扣版本，可以优先下载这一版。)

18650 and 21700 battery box design highlights:
1) The edges feature grooved clasps allowing for flexible splicing and expansion, enabling versatile series and parallel configurations:

18650电池盒，21700电池盒 设计特色：

1）边缘设计有滑槽卡扣，可以自由拼接扩展，串并联自由发挥：

2) The electrode plate area incorporates a retaining clasp:

2）电极片位置设计有卡扣，卡住极片：

3) Screw holes are provided on the base for convenient mounting and securing Screw hole diameter 2.1mm, spacing 50mm, countersunk screw head diameter 4.5mm, depth 0.8mm; M2 countersunk screws are recommended; a 4mm screw head diameter is sufficient;

3）底部设计有螺丝孔，以方便安装固定。螺丝孔直径2.1mm，间距50mm，螺丝头凹槽直径4.5mm，深度0.8mm；推荐使用M2的沉头螺丝安装；螺丝头直径4mm即可；

4) 18.5mm wide electrode pads are utilized, costing 0.13 yuan per set on Taobao, offering affordability and ease of use Note the electrode pad dimensions, as other models may be incompatible

4）电极片使用18.5mm宽度的电极片，淘宝价格一套0.13元，便宜好用。注意电极片的尺寸，其他型号的电极片可能并不适用。

Link:【淘宝】https://m.tb.cn/h.giW3knA9dTDCDaV?tk=Uuqk3YkMBNj CZ8908 「18650电池弹片导电连接金属正负极弹簧片3.7V电池座一节两节三节」
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