What is the structure and characteristics of the laminated cell?
2022 Jan 24 By admin 0 comment

1. Structure of Laminated cells
1) How to combine batteries
In actual work, according to the use requirements of different occasions, several batteries are often used in combination in a certain way. There are usually two ways to use batteries in combination.
(1) The single cells of the same type are used in series, which is called a combined battery, or a battery pack for short.
(2) The single cells of the same type are combined in series and parallel, which is called a mixed combination, and the combined battery is called a duplex battery.

2) The structure of square Laminated cells
The exact meaning of Laminated cells is: connect multiple flat cells of the same type in series to form a battery pack, and then encapsulate them as a whole to form Laminated cells. Figure 1 shows two types of square Laminated cells.

What is the structure and characteristics of the laminated cell?
Figure 1 Graphics of laminated cells

Shown in Figure 1(a) is a square Laminated cell with a 10F20 cap-type copper electrode, which is rated at 15V.
Shown in Figure 1(b) is a square Laminated cell with a 6F22 snap-on copper electrode, which is rated at 9V.
The internal structure of such square Laminated cells is composed of flat single cells connected in series as shown in Figure 2(a). The flat single battery is actually an ordinary zinc-manganese dry battery, but the shape is square. It is still composed of zinc shell negative electrode, manganese dioxide carbon coating, diaphragm, electrolyte zinc paste, copper sheet positive electrode, etc. Its rated voltage is 1.5V. 10 such batteries are connected in series as shown in Figure 2(b), and then packaged as a whole and labeled with a trademark, that is, a 10F20 type Laminated cells product.
Since the voltage of a single cell is 1.5V, after 10 Laminated cells are connected in series, its rated voltage is 15V, as shown in Figure 1(a). If 6 single cells are connected in series, its rated voltage is 9V, as shown in Figure 1(b).
It should also be pointed out that from the perspective of common Laminated cells, some lead out the positive and negative poles from both ends, and some lead out the positive and negative poles from the same end. As shown in Figure 1(a)(b), respectively.

What is the structure and characteristics of the laminated cell?
Figure 2 Schematic diagram of the structure of the laminated cell

3) Structure of circular Laminated cells
According to different requirements of electrical appliances, Laminated cells can also be made into a cylindrical shape. As shown in Figure 3(a), it is a Super L1028 (GP-23A12V) cylindrical Laminated cells. Its structure is described below.

What is the structure and characteristics of the laminated cell?
Figure 3 Structure of L1028 Alkaline Laminated cell

In order to recognize the structure of L1028 type Laminated cells, we list its anatomical diagram in Figure 3, so that readers can understand more intuitively.
As shown in Figure 3(a), the shape of L1028 type Laminated cells is p10mm×28.2mm.
As shown in Figure 3(b), after dismantling the label of the outer iron shell of the battery and prying off the top cover, the white insulating adhesive layer inside is exposed.
As shown in Figure 3(c), after removing the insulating layer of the battery, the interior is composed of 8 1.5V LR932 alkaline zinc-manganese button batteries in series, so its rated voltage is 12V. It can also be seen from Figure 3(c) that the top is the insulating layer and the iron shell, the bottom left and right are the metal accessories of the positive and negative electrodes of the Laminated cells, and the rest are 8 button batteries.
As shown in Figure 3(d), the positive and negative surfaces of the button cell are LR932 alkaline manganese dry batteries, and the size of the button cell is φ9mm×3.2mm.
Figure 3(e) shows the appearance of the positive end of L1028 type Laminated cells.
It can be seen from the above structure that it is composed of button-type alkaline zinc-manganese single cells connected in series, so it belongs to alkaline zinc-manganese Laminated cells and is a kind of dry battery.

2. Models and characteristics of Laminated cells
1) Naming method of Laminated cells model
Laminated cells are composed of multiple ordinary batteries in series or parallel, or a combination of series and parallel in a lamination or wire connection process. Therefore, the model naming of Laminated cells is also similar to that of ordinary batteries.
Laminated cells Standard model consists of five parts. The first part uses numbers to indicate the number of batteries (or battery packs) in series; the second part uses a letter to indicate the battery’s manufacturing material (type); the third part uses a letter to indicate the shape of the battery; the fourth part uses numbers to indicate the battery Specification number (dimension); the fifth part uses numbers to indicate the number of parallel batteries.
The common letters and their meanings in the second part of the Laminated cells model are shown in Table 1.

Common lettersSB or CPLTM or N
meaningOrdinary zinc manganese paste batteryHigh-capacity cardboard battery or lithium manganese batteryHigh Power Zinc Chloride BatteryHigh specific energy alkaline zinc manganese batterySilver zinc batteryZinc mercury battery
Table 1 The common letters and their meanings in the second part of the laminated battery model are shown in the table

See Table 2 for the letter E and its meaning in the third part of the laminated battery model.

Common lettersRSF
meaningcylindricalflatsquare
Table 2 Common letters and their meanings in the third part of the laminated battery model are shown in the table

The 3R20-4 model shown in Figure 4(b) indicates that the Laminated cells are composed of 3 R20 batteries connected in series to form a battery group, and then composed of the same 4 groups of batteries in parallel.

What is the structure and characteristics of the laminated cell?
Figure 4 Laminated cell model naming components and their meanings

Model 6F22, which means Laminated cells composed of 6 F22 square cells in series.
It needs to be explained: ① When actually marking the model of Laminated cells, if there is no parallel form in the composition of Laminated cells, then the model will not mark the fifth part, such as the 4LR55 model. ②When actually marking the model of Laminated cells, the abbreviation method is often used. For example, in the 3R20-4 model, the letter in front of the R indicating the type of Laminated cells is omitted.
Such Laminated cells are generally ordinary (S) zinc-manganese batteries. ③The serial number of the fourth part of the model of Laminated cells indicates the order number of similar batteries arranged from small to large. The ordinal number corresponds to the size of the battery.
By the way, the commonly used Laminated cells are mostly ordinary zinc-manganese Laminated cells as shown in Figure 1 and alkaline zinc-manganese Laminated cells as shown in Figure 3. In addition, there are silver zinc Laminated cells and cadmium nickel Laminated cells and so on.

2) Characteristics of Laminated cells
Laminated cells mainly reflect the use of batteries in series. No matter how many single cells are connected in series, the output voltage of Laminated cells can be improved. This shows that the voltage of Laminated cells is generally higher, which is an integer multiple of the voltage of the series-connected cells.
Usually the voltage of a single battery is 1.5V, two batteries in series are 3V, three batteries in series are 4.5V, and so on. The voltages of common Laminated cells are 6V, 9V, 12V, 15V, 22.5V and other specifications.
It can be seen from the above that Laminated cells are composed of small-volume, small-capacity single cells packaged, not bulk battery packs. This determines that the capacity of Laminated cells is small and the internal resistance is large, and they are only suitable for small current discharge occasions. However, Laminated cells have the advantages of high voltage, long storage life, high specific energy (electricity per unit mass or volume) during low current discharge, and little maintenance. It is widely used in portable electronic products that require high voltage power supply. Such as multimeters, cameras, toys, etc. are commonly used Laminated cells.