Battery module

A battery module and battery cell technology, applied in the field of energy storage, can solve the problems of distortion and deformation of the battery cell, poor wettability of the electrolyte, and influence on the cycle performance of the battery, so as to reduce the expansion rate, excellent cycle performance, and prevent distortion and deformation. Effect

A battery module and battery cell technology, applied in the field of energy storage, can solve the problems of distortion and deformation of the battery cell, poor wettability of the electrolyte, and influence on the cycle performance of the battery, so as to reduce the expansion rate, excellent cycle performance, and prevent distortion and deformation. Effect

CN110265591AActive Publication Date: 2019-09-20CONTEMPORARY AMPEREX TECH CO
4 Cites 11 Cited by

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Battery module
  • Battery module
  • Battery module

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0080] Preparation of positive electrode sheet

[0081] The cathode active material LiNi 0.8 co 0.1 mn 0.1 o 2, conductive carbon black and binder polyvinylidene fluoride (PVDF) are dispersed in the solvent N-methylpyrrolidone (NMP) according to the weight ratio of 8:1:1, and stirred evenly to obtain the positive electrode slurry; the positive electrode slurry Evenly coated on the aluminum foil of the positive electrode current collector, after drying, cold pressing, slitting, and cutting into pieces, the positive electrode sheet is obtained.

[0082] Preparation of negative electrode sheet

[0083] Negative electrode active material artificial graphite, conductive carbon black, thickener carboxymethyl cellulose (CMC) and binder styrene-butadiene rubber (SBR) are dispersed in solvent deionized water according to the weight ratio 89:6:3:2, stir Evenly, the negative electrode slurry is obtained; the negative electrode slurry is evenly coated on the copper foil of the ne...

Embodiment 2～10

[0091] The difference from Example 1 is that the relevant parameters of the separator are adjusted, see Table 1 for details.

Embodiment 11

[0093] The difference from Example 2 is that a separator is provided between every two adjacent battery cells, each battery cell includes two single batteries, and the relevant parameters of the separator are adjusted, see Table 1 for details.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
thermal conductivityaaaaaaaaaa
pore sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a battery module and belongs to the technical field of energy storage. The battery module includes: a frame having a receiving space; a plurality of battery units which are successively arranged in the receiving space of the frame along the thickness direction of the battery units, wherein separating plates are disposed between adjacent battery units and have compressibility, and a compression ratio [delta]1 of the separating plates at a pressure less than or equal to 2MPa satisfies a condition of C0*[delta]1 <= A0*0.2, wherein C0 is the initial thickness of the separating plates, and A0 is the initial thickness of the battery units. The battery module provided by the invention has excellent cycle performance.

Description

technical field [0001] The present application belongs to the technical field of energy storage, and in particular relates to a battery module. Background technique [0002] Batteries can convert chemical energy into electrical energy, have stable voltage and current, reliable performance, environmental friendliness, simple structure and easy portability, and have become the main power source of electric vehicles. In order to meet the requirements of high power and long-duration battery life, a battery module is usually composed of a plurality of single cells, or a battery pack is further composed of a plurality of battery modules. [0003] During the charging and discharging process of the single battery of the battery module, the electrode pole piece will expand in volume due to the different delithiation or lithium intercalation states of the active material. The volume expansion of the electrode pole piece will inevitably lead to stress in the single battery. These stre...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
20 Sep 2019
Publication
CN110265591A
IPC
H01M2/10; H01M10/658; H01M50/209; H01M50/293
CPC
H01M10/658; H01M2220/20; H01M50/209; H01M50/293; H01M10/0481; H01M10/613; H01M10/625; H01M10/647
Inventors
赵丰刚; 凃俊达