JPH0714568A - Battery pack - Google Patents

Abstract

(57) [Summary] [Purpose] To obtain a predetermined voltage arbitrarily and effectively in an assembled battery formed by combining one or more cell batteries. [Structure] A negative electrode formed by applying a negative electrode active material 4 onto a negative electrode current collector 5 formed of a metal foil, and a positive electrode active material 2 applied onto a positive electrode current collector 3 formed of a metal foil. A plurality of sets of battery groups 11 are configured by one or a plurality of thin battery cells 1 each having a negative electrode and a separator 6 which are arranged to face each other, and are stacked.
One battery case 14 is stacked and accommodated, and the electrode lead 18 for taking out the output is drawn out from the battery case 14 for each battery group 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention constitutes a plurality of battery groups by stacking one or a plurality of thin cell batteries, and combining a plurality of battery groups from these battery groups. Regarding assembled battery.

[0002]

2. Description of the Related Art In a small electronic device using a battery as a driving source, an alkaline aqueous battery such as a thin and high-performance silver oxide battery, an alkaline manganese battery, a nickel zinc battery, an air battery is generally used. There is. In this alkaline aqueous solution type battery, zinc powder is commonly used as a negative electrode active material, and 30% to 50% potassium hydroxide (KOH) and sodium hydroxide (NaOH) are commonly used as an electrolytic solution. Various soluble metal oxides are used.

For example, a silver oxide battery widely used as a so-called button battery is (−) Zn (Hg) / KO.
It has a structure of H or NaOH, H ₂ O / Ag ₂ O (C) (+), has a flat discharge curve of the discharge duration of a terminal voltage of 1.5 V, has excellent low-temperature characteristics, and has a large energy density. It has various characteristics. Further, in the alkaline manganese battery, electrolytic MnO ₂ is used as the positive electrode active material,
(−) Zn (Hg) / KOH or NaOH, H ₂ O / M
nO ₂ (C) (+) configuration, nominal voltage 1.5V,
It is widely used as a substitute for silver oxide batteries because of its excellent large current characteristics and low temperature characteristics and its low cost.

On the other hand, in small electronic devices using these batteries as drive sources, many have different voltage specifications due to higher performance, more complex functions, etc. To accommodate this, a transformer circuit is provided. Therefore, the voltage of one power supply battery is transformed into a predetermined voltage by this transformer circuit to deal with it, but there is a problem that the device becomes large.

Therefore, for example, one or a plurality of cell batteries having a voltage of 1.5 V are combined in a stacked state to form a battery pack, and the electrode leads for taking out the output of the battery pack have a specified voltage of electronic equipment. There is also provided an electronic device configured so as to be compatible with various voltage specifications by appropriately selecting it.

[0006]

However, in an electronic device using such an assembled battery as a drive source, the assembled battery is
Since a plurality of cell batteries are combined in a stacked state, when one of the stacked plurality of cell batteries becomes insufficient in capacity, other cell batteries have sufficient capacity. Therefore, there arises a problem that a predetermined capacity cannot be taken out. Furthermore, when the capacity of one of the plurality of stacked cell batteries becomes extremely small, the voltage of the other cell battery is applied to this cell battery, resulting in an overdischarge state and the positive and negative potentials are reversed. A reversal phenomenon may occur.

By the way, in a so-called button type battery, a positive electrode can and a negative electrode cup are arranged in a sealing die via a sealing packing, and a positive electrode can and a negative electrode cup are provided by a knockout member protruding from above and below the sealing die. The opening edge portion of the positive electrode can is caulked to the peripheral edge of the negative electrode cup while holding. Therefore, in such a button type battery, when the electrode lead is directly taken out from each of the positive electrode and negative electrode current collectors, the shield of the taken out portion of the electrode lead becomes insufficient, and the electrode lead may be broken due to caulking. is there. Therefore, the button type battery does not employ a structure in which the electrode leads are directly taken out.

Therefore, the present invention has been proposed for the purpose of providing an assembled battery in which one or a plurality of cell batteries are combined, and a predetermined voltage can be taken out arbitrarily and effectively. Is.

[0009]

Means for Solving the Problems An assembled battery according to the present invention, which has achieved this object, is a negative electrode and a positive electrode active material formed by applying a negative electrode active material onto a negative electrode current collector formed of a metal foil. 1 is a thin cell battery in which a positive electrode formed by coating on a positive electrode current collector formed in
A plurality of sets of battery groups are configured with one or a different number of stacked batteries, and these battery groups are stacked and housed in one battery case, and electrode leads for output extraction are provided for each battery group. It is characterized in that each of them is configured to be pulled out from the battery case.

The battery pack according to the present invention is characterized in that a plurality of battery groups housed in a stacked state in a battery case are such that at least adjacent battery groups are insulated from each other. The case is characterized by being cylindrical. Further, the electrode lead for taking out the output of each battery group is led out along the inner peripheral surface of the battery case and is connected to the terminal while being shielded by the insulating resin at the lead-out portion. Item 1. The assembled battery according to item 1.

Furthermore, the assembled battery according to the present invention is an assembled battery formed by combining a plurality of battery groups in a stacked state, and the terminal portions of each battery group are concentrically arranged on an insulating substrate. It is characterized by In addition, a plurality of battery groups are configured by applying a negative electrode active material on a negative electrode current collector formed of a metal foil and forming a negative electrode and a positive electrode active material on a positive electrode current collector formed of a metal foil. And a laminated battery in which different numbers of thin cell batteries are stacked so as to face each other with a positive electrode interposed therebetween, and these battery groups are stacked and housed in one battery case. In addition, each of the battery groups is configured so that the leads for taking out the output drawn out from the battery case are selected and connected to the terminal portions arranged concentrically on the insulating substrate.

[0012]

According to the assembled battery of the present invention having the above-described structure, a plurality of battery groups are constituted by one cell battery or a laminated battery formed by stacking different numbers of cells, and these battery groups are formed into one battery group. Since the electrode leads for output extraction are taken out from each battery group while being stacked and stored in a battery case while maintaining insulation, the electrode leads for each output extraction are appropriately selected. By connecting them in parallel, it is possible to take out a desired plurality of types of voltages from one assembled battery.

Further, according to the assembled battery of the present invention, a plurality of battery groups are combined in a laminated state, and an insulating substrate is provided through the electrode leads for taking out the output which hold the terminals of these battery groups in an insulated state from each other. By arranging them concentrically above, by appropriately selecting and connecting the terminal portions, it becomes possible to take out a desired plurality of types of voltages from one assembled battery.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the present invention will be described below in detail with reference to the drawings. In the assembled battery 10 of FIG. 1 shown as the first embodiment, for example, a silver oxide battery 1 having a voltage of 1.5 V is used as a cell battery, and this cell battery may be one or a different number as described later. A plurality of sets of battery groups 11A to 11C are combined in a stacked state, and these battery groups 11A to 11C are combined in a stacked state and housed in the battery case 14.

As shown in FIG. 2, the silver oxide battery 1 constituting each cell battery of the battery groups 11A to 11C has a silver oxide (A
g ₂ O) as a main component, a positive electrode active material 2 is applied or vapor-deposited on a positive electrode current collector 3 made of a metal foil to form a positive electrode, and a negative electrode active material 4 containing zinc powder as a main component is used as a metal foil. A negative electrode is formed by coating or vapor deposition on the negative electrode current collector 5 consisting of. The positive electrode current collector 3 and the negative electrode current collector 5 are arranged to face each other with a separator 6 having a two-layer structure in which an ethylene film and a cellophane film are laminated, and the periphery thereof is covered with a polypropylene base film on both sides. It is sealed with an insulating sealing packing 7 in which a hot melt having a thickness of 20 to 30 mm is laminated.

Further, potassium hydroxide (KOH) is contained in the positive electrode current collector 3 and the negative electrode current collector 5 which are held in an insulated state by sealing the outer periphery with the sealing packing 7.
Alternatively, by dropping an electrolytic solution containing sodium hydroxide (NaOH), a silver oxide battery (cell battery) 1
Is configured.

Six cell batteries 1 configured as described above
A to 1F are composed of one cell battery 1A.
A first battery group 11A that outputs a voltage of 5V and a second battery group 11 that outputs a voltage of 3.0V by stacking two cell batteries 1B and 1C so as to be connected in series
B and three cell batteries 1D, cell batteries 1E and 1F are stacked so as to be respectively connected in series, and a third battery group 11C that outputs a voltage of 4.5 V is configured. In addition, the cell battery 1B and the cell battery 1C that form the second battery group 11B are integrated by covering the entire peripheral portion with the heat-shrinkable tube 12, and the cell battery that forms the third electrode group 11C. The 1D, the cell battery 1E, and the cell battery 1F are also integrated by covering the entire peripheral portion with the heat-shrinkable tube 13.

The first to third electrode groups 11A to 11C configured as described above have the second electrode group 11B with respect to the positive electrode collector 3 which constitutes the positive electrode terminal of the first electrode group 11A.
The negative electrode current collector 5 of the upper cell battery 1B that constitutes the negative electrode terminal of the
A and the second electrode group 11B are combined in a laminated state. Further, the negative electrode current collector of the upper cell battery 1D constituting the negative electrode terminal of the third electrode group 11C is opposed to the positive electrode collector 3 of the lower cell battery 1C constituting the positive electrode terminal of the second electrode group 11B. The second electrode group 11B and the third electrode group 11C are combined in a stacked state such that the body 5 is abutted.

The first to third electrode groups 11A to 11C combined in the three-layer state as described above are housed in the battery case 14. The battery case 14 is formed of a metal material into a cylindrical shape having a bottom, and has a third portion on the bottom thereof.
The positive electrode current collector 3 forming the positive electrode terminal of the cell battery 1F positioned in the lowermost layer of the electrode group 11C comes into contact with the entire battery cell 10 to form the positive electrode terminal.

Further, the first to third electrode groups 11A to 1
In the opening of the battery case 14 accommodating 1C in a stacked state, a sealing plate 15 is incorporated through a sealing packing member 16 fitted in the inner circumference of the battery case 14. Sealing plate 15
Is formed of a conductive plate such as a metal plate into an overall disc shape having a diameter slightly smaller than the inner diameter of the battery case 14, and the first battery group 1
When the negative electrode current collector 5 constituting the negative electrode of the cell battery 1A constituting 1A is brought into contact with the battery pack 1A, the battery pack 1 as a whole is assembled.
Configure the negative electrode terminal of 0.

The sealing packing member 16 is an entire ring-shaped member whose outer diameter is substantially the same as the inner diameter of the opening of the battery case 14 and whose inner diameter is slightly smaller than the outer diameter of the sealing plate 15, and which is insulated. It is formed of a nylon-based synthetic resin having properties. The sealing packing member 16 has a first
The cell battery 1A constituting the battery group 11A is fitted along the inner peripheral wall from the opening of the battery case 14 so as to hold the outer peripheral portion. The sealing packing member 16 is provided with first to fourth electrode lead lead-out holes 17A to 17D at different positions in the circumferential direction at its peripheral portion. These electrode lead drawing holes 17A to 1
First to fourth electrode leads 18A to 18D are drawn out from the inside of the battery case 14 to 7D, respectively, as described later.

The sealing plate 15 has the sealing packing member 16 fitted to the inner peripheral wall of the battery case 14, and the cell battery 1A constituting the first battery group 11A as described above.
The negative electrode current collector 5 that constitutes the negative electrode of
The battery case 14 is press-fitted into the inner hole of the sealing packing member 16 from the opening portion to be assembled. In order to maintain the press-fitted combined state of the sealing member 15, the inner peripheral wall of the battery case 14 is filled with a sealing agent made of epoxy resin or the like in a state of straddling the sealing member 15 and the sealing packing member 16. The seal portion 19 is configured.

The assembled battery 10 of the embodiment configured as described above.
In, the electrode leads are respectively drawn from the first to third battery groups 11A to 11C assembled in the battery case 14 in a stacked state. That is, regarding the first electrode group 11A, the other end side of the first electrode lead 18A having one end connected to the side portion of the positive electrode current collector 3 of the cell battery 1A is formed into the sealing packing member 16 at the other end side. The positive electrode side lead is formed by pulling out from the first electrode lead lead hole 17A to the outside of the battery case 14. The negative electrode side of the first electrode group 11A is connected to the first electrode group 1A.
Since the negative electrode current collector 5 of the cell battery 1A constituting 1A comes into contact with the sealing member 15 to form a negative electrode exposed to the outside of the battery case 14, no electrode lead is required.

Regarding the second electrode group 11B, one end of the second electrode lead 18B is connected to the side portion of the negative electrode current collector 5 of the cell battery 1B stacked on the upper side. The other end of the lead 18B is pulled out to the outside of the battery case 14 from the second electrode lead lead-out hole 17B formed in the sealing packing member 16 to form the negative electrode side lead. Similarly, the cell battery 1 stacked on the lower side
One end of the third electrode lead 18C is connected to the side portion of the C positive electrode current collector 3, and the other end of the third electrode lead 18C is provided in the sealing packing member 16 as a third end. The positive electrode side lead is formed by pulling it out of the battery case 14 through the electrode lead lead hole 17C.

Regarding the third electrode group 11C, the other end of the fourth electrode lead 18D having one end connected to the side portion of the negative electrode current collector 5 of the cell battery 1D stacked on the upper side is connected to the sealing packing member. Fourth electrode lead extraction hole 1 formed in 16
A negative electrode side lead is formed by pulling out from 7D to the outside of the battery case 14. A positive electrode exposed to the outside is formed on the positive electrode side of the third electrode group 11C by exposing the positive electrode current collector 3 of the cell battery 1F constituting the third electrode group 11C to the battery case 14. Therefore, the electrode lead is unnecessary.

By the way, each of the above-mentioned electrode leads 18A to 18D is made of a copper alloy wire which is insulation-coated with Teflon.

The assembled battery 10 of the embodiment configured as described above.
Battery case 14, sealing member 15 and each electrode lead 18
It is possible to output five types of voltages by appropriately selecting. That is, by selecting the battery case 14 (+) and the sealing member 15 (-) as the output terminals as the first connection example, the first to third electrode groups 11A to 11C, in other words, 1.5 V Cell batteries 1A to 1F
Can be connected in series to obtain a voltage output of 9V.

As a second connection example, the battery case 14
By selecting and connecting (+) and the second electrode lead 18B (-), the second and third electrode groups 11B, 1
1C, in other words, the voltage output of 7.5V obtained by connecting the cell batteries 1B to 1F in series can be obtained. Further, as a third connection example, the battery case 14 (+) and the fourth case
The third electrode group 11C, in other words, the cell battery 1D by selecting and connecting the electrode lead 18D (−) of
It is possible to obtain a voltage output of 4.5 V obtained by connecting 1 to 1F in series.

On the other hand, as a fourth connection example, the sealing member 15
By selecting and connecting the (−) and the third electrode lead 18C (+), the first electrode 18C (+) is connected in the same manner as in the third connection example.
Also, it is possible to obtain a voltage output of 4.5 V obtained by connecting the second electrode groups 11A and 11B, in other words, the cell batteries 1A to 1C in series. Further, as a fifth connection example, the sealing member 15 (-) and the first electrode lead 18A (+) are selected and connected, whereby the first electrode group 11A,
In other words, a voltage output of 1.5V for one cell battery 1A can be obtained. Further, as a sixth connection example, a second electrode lead 18B (-) and a third electrode lead 18C are provided.
A voltage output of 3.0 V of the second electrode group 11B can be obtained by selecting and connecting (+).

In the battery pack 10 of the first embodiment, the output voltage obtained by connecting the battery case 14, the sealing member 15 and the electrode leads 18 one by one has been described. For example, a positive battery case. When a terminal in which the negative electrode side is commonly connected to the sealing member 15 and the fourth electrode lead 18D is selected for 14, the first electrode group 11A and the third electrode group 11C, in other words, the cell battery It is also possible to obtain a voltage output of 6V obtained by connecting 1A and the cell batteries 1D to 1F in series, which makes it possible to obtain six types of output voltages as a whole.

Referring to FIG. 5, the assembled battery 20 shown as the second embodiment of the present invention comprises a first electrode group 21 consisting of one cell battery 21A and two cell batteries 22A and 22B connected in series. It is composed of a second electrode group 22 which is connected. The individual cell batteries 21A and 22A, 22B constituting the electrode groups 21, 22 are the same as the cell battery 1 constituting the above-mentioned first embodiment assembled battery 10, and the same members are designated by the same reference numerals. Therefore, the description of the configuration, operation, etc. is omitted.

In the battery pack 20 according to the second embodiment, the first electrode group 21 and the second electrode group 22 described above are connected to the positive electrode current collector 3 constituting the positive electrode terminal of the first electrode group 21. Second to
Cell battery 22 forming the negative electrode terminal of the electrode group 22 of
The negative electrode current collector 5 of A is abutted against each other and is assembled in series in the battery case 23 in a stacked state. Then, on the bottom of the battery case 23, which is formed of a metal material in the shape of a cylinder with a bottom, the positive electrode current collector 3 that constitutes the positive electrode terminal of the cell battery 22B positioned below the second electrode group 22.
The battery case 23 as a whole constitutes a positive electrode terminal of the assembled battery 20 by contacting with each other.

A sealing plate 26 is incorporated in the opening of the battery case 23 via a sealing packing member 24.
The sealing plate 26 is used for the cell battery 2 that constitutes the first battery group 21.
The negative electrode current collector 5 that constitutes the negative electrode of 1 A contacts the negative electrode terminal of the battery pack 20 as a whole. The sealing packing member 24 is provided with first and second electrode lead lead-out holes 27A and 27B at different positions in the circumferential direction on the peripheral edge thereof. First
The other end side of the first electrode lead 28A (positive electrode) whose one end is connected to the side portion of the positive electrode current collector 3 of the cell battery 21A is inserted into the electrode lead extraction hole 27A of the battery case 23.
Be pulled out of.

Further, in the second electrode lead lead-out hole 27B formed in the sealing packing member 24, the side portion of the negative electrode current collector 5 of the lower cell battery 22B constituting the second electrode group 22 is formed. The other end of the second electrode lead 28B (negative electrode) whose one end is connected to is inserted and is drawn out of the battery case 23.

According to the battery pack 20 of the second embodiment configured as described above, the battery case 23 (+) and the sealing plate 26 are provided.
An output voltage of 4.5 V can be obtained by selecting and connecting (-) to the battery case 23 (+) and the second
An output voltage of 3V can be obtained by selecting and connecting the electrode lead 28B (-) of the. Further, by selecting and connecting the sealing plate 26 (-) and the first electrode lead 28A (+), an output voltage of 1.5V can be obtained.

In the assembled battery 30 shown as the third embodiment of the present invention in FIG. 6, a first electrode group 31 consisting of one cell battery 31A and two cell batteries 32A and 32B are connected in series. Second electrode group 32 formed by connection and three cell batteries 33
A third electrode group 33 formed by connecting A, 33B and 33C in series and four cell batteries 34A, 34B, 34C and 34
And a fourth electrode group 34 in which D is connected in series, and these electrode groups 31 to 34 are housed in a battery case 35 in a laminated state. In addition, these electrode groups 3
The individual cell batteries 31A and (3
2A, 32B) (33A to 33C) and (34A to 34D) are the above-described first and second embodiment assembled batteries 1
This is the same as the cell battery 1 that configures 0 and 20, and the same members are denoted by the same reference numerals and the description of the configuration, action, and the like is omitted.

In this third embodiment assembled battery 30, the above-mentioned first electrode group 31 and second electrode group 32 are combined with the positive electrode current collector 3 of the cell battery 31A constituting the first electrode group 31. On the other hand, the current collectors 5 of the cell battery 32A on the upper side, which constitutes the negative electrode terminal of the second electrode group 32, are laminated and connected in series so as to abut each other. In addition, the lower cell battery 3 of the second electrode group 32
The second electrode group 32 and the third electrode group 33 are arranged such that the negative electrode current collector 5 of the upper cell battery 33A forming the third electrode group 33 is abutted against the positive electrode current collector 3 of 2B. And are stacked and connected in series.

Further, the negative electrode current collector 5 of the upper cell battery 34A constituting the fourth electrode group 34 is butted against the positive electrode current collector 3 of the lower cell battery 33C of the third electrode group 33. In this way, the third electrode group 33 and the fourth electrode group 34 are laminated and connected in series, and the respective electrode groups 31 to 34 are connected.
Is the lower cell battery 34D that constitutes the fourth electrode group 34.
The positive electrode collector 3 of the battery case 3 is housed in a stacked state so as to come into contact with the bottom of the battery case 35.
5 constitutes the positive electrode terminal of this assembled battery 30 as a whole.

A sealing plate 36 is incorporated in the opening of the battery case 35 via a sealing packing member 37.
The sealing plate 36 is the cell battery 3 that constitutes the first battery group 31.
The negative electrode current collector 5 of 1 A comes into contact with the negative electrode current collector 5 to form the negative electrode terminal of the assembled battery 30 as a whole. The sealing packing member 24 has first to sixth electrode lead lead-out holes 38A to 4 at different positions in the circumferential direction on its peripheral portion.
3A is drilled. The first electrode lead lead-out hole 38A has a first end connected to a side portion of the positive electrode current collector 3 of the cell battery 31A forming the first electrode group 31.
The other end of the electrode lead 38 (positive electrode) is inserted and drawn out of the battery case 35.

Similarly, in the second electrode lead lead-out hole 39A, the cell battery 32 constituting the second electrode group 32 is formed.
The other end of the second electrode lead 39 (negative electrode) whose one end is connected to the side portion of the negative electrode current collector 5 of A is inserted into the battery case 3
5, and the cell battery 32 that constitutes the second electrode group 32 in the third electrode lead extraction hole 40A.
The other end side of the third electrode lead 40 (positive electrode) whose one end is connected to the side portion of the negative electrode current collector 5 of B is inserted into the battery case 3
5 is pulled out.

Further, the fourth electrode lead lead-out hole 41
In A, the other end of the fourth electrode lead 41 (negative electrode) whose one end is connected to the side portion of the negative electrode current collector 5 of the cell battery 33A forming the third electrode group 33 is inserted, and the battery case 35 is inserted. Of the fifth electrode lead lead-out hole 41
The other end side of the fifth electrode lead 42 (positive electrode) whose one end is connected to the side portion of the negative electrode current collector 5 of the cell battery 33C that constitutes the third electrode group 33 is inserted into A and the battery case 35 is inserted. Be pulled out of. Further, the sixth electrode lead lead-out hole 43A is provided with a sixth electrode lead 43 (negative electrode) whose one end is connected to a side portion of the negative electrode current collector 5 of the cell battery 34A forming the fourth electrode group 34. The other end is inserted and pulled out of the battery case 35.

The assembled battery 30 of the embodiment configured as described above.
Battery case 35, sealing member 36, and electrode leads 38
Eleven types of voltage outputs can be obtained by appropriately selecting the values from to 43. That is, when obtaining the first voltage output of 1.5 V, the voltage output of the first electrode group 31 is 1.5 V by selecting and connecting the sealing member 36 and the first electrode lead 38. obtain. In addition, in order to obtain the first voltage output of 3.0 V, the two cell batteries 32A and 32B are connected by selecting and connecting the second electrode lead 39 and the third electrode lead 40. A voltage output of 3.0 V of the second electrode group 32 which is connected in series is obtained.

To obtain the third voltage output of 4.5 V, the sealing member 36 and the third electrode lead 40 are selected and connected to each other, so that the first and second electrode groups 31,
Voltage output (1.5V + 3.0
V) or selecting and connecting the fourth electrode lead 42 and the fifth electrode lead 42 to connect the three cell batteries 33A to 33C in series.
The voltage output of the electrode group 33 of 4.5V is obtained.

To obtain the fourth voltage output of 6.0 V, the battery case 35 and the sixth electrode lead 43 are selected and connected to connect the four cell batteries 34A to 34D in series. The voltage output of 6.0 V of the connected fourth electrode group 34 is obtained, or the sealing member 36 and the fourth electrode lead 41 are connected in series, and this series circuit and the fifth electrode lead 42 are connected. By connecting, a voltage output (1.5V + 4.5V) in which the first electrode group 31 and the third electrode group 33 are connected in series is obtained.

In order to obtain the fifth voltage output of 7.5 V, the sealing member 36 for obtaining the voltage output of the first electrode group 31.
And the circuit of the first electrode lead 38, the battery case 35 for obtaining the voltage output of the fourth electrode group 34, and the sixth electrode lead 43.
Voltage output (1.5V + 6.0)
V) is obtained. Alternatively, a circuit of the second electrode lead 39 and the third electrode lead 40 that obtains the voltage output of the second electrode group 32, and a fourth electrode lead 41 and the fifth electrode lead 41 that obtains the voltage output of the third electrode group 33. A voltage output (3.0V + 4.5V) is obtained by connecting the circuit of the electrode lead 42 in series.

In order to obtain the sixth voltage output of 9.0 V, the circuit of the second electrode lead 39 and the third electrode lead 40 for obtaining the voltage output of the second electrode group 32, and the fourth circuit. Obtaining the voltage output of the electrode group 34 Obtaining the voltage output of the fourth electrode group 34 The voltage output (3.0V + 6.0V) in which the battery case 35 and the circuit of the sixth electrode lead 43 are connected in series is obtained. Alternatively, the circuit of the sealing member 36 and the first electrode lead 38 for obtaining the voltage output of the first electrode group 31, and the second electrode lead 39 and the third electrode lead for obtaining the voltage output of the second electrode group 32. The voltage output (1.5V + 3.0V +) in which the circuit of 40 and the circuit of the fourth electrode lead 41 and the circuit of the fifth electrode lead 42 for obtaining the voltage output of the third electrode group 33 are connected in series.
4.5 V) is obtained.

To obtain the seventh voltage output of 10.5 V, the circuit of the fourth electrode lead 41 and the fifth electrode lead 42 for obtaining the voltage output of the third electrode group 33, and the fourth electrode A voltage output (4.5V) in which the battery case 35 for obtaining the voltage output of the group 34 and the circuit of the sixth electrode lead 43 are connected in series
+6.0 V) is obtained. Alternatively, the circuit of the sealing member 36 and the first electrode lead 38 for obtaining the voltage output of the first electrode group 31, and the second electrode lead 39 and the third electrode lead 40 for obtaining the voltage output of the second electrode group 32. Circuit and the circuit of the sixth electrode lead 43 for obtaining the voltage output of the fourth electrode group 34 and the circuit of the sixth electrode lead 43 are connected in series (1.5 V
+ 3.0V + 6.0V) is obtained.

To obtain the eighth voltage output of 12.0 V, the sealing member 3 for obtaining the voltage output of the first electrode group 31.
6, the circuit of the first electrode lead 38, and the third electrode group 33.
A voltage in which a circuit of the fourth electrode lead 41 and the fifth electrode lead 42 for obtaining a voltage output and a battery case 35 and a circuit of the sixth electrode lead 43 for obtaining a voltage output of the fourth electrode group 34 are connected in series. Obtain the output (1.5V + 4.5V + 6.0V).

When obtaining the ninth voltage output of 13.5 V, the circuit of the second electrode lead 39 and the third electrode lead 40 for obtaining the voltage output of the second electrode group 32, and the third circuit. Electrode group 33 Fourth electrode lead 41 and fifth for obtaining voltage output
The voltage output (3.0V + 4.5V +) in which the circuit of the electrode lead 42 and the battery case 35 for obtaining the voltage output of the fourth electrode group 34 and the circuit of the sixth electrode lead 43 are connected in series.
6.0 V) is obtained.

To obtain the 10th voltage output of 15.0 V, the battery case 35 and the sealing member 36 are selected and connected, so that the first to fourth electrode groups 31 to 34 are connected in series. Connected, in other words, a voltage output is obtained in which all 10 cell batteries housed in the battery case 35 are connected in series.

FIGS. 7 and 8 show a fourth embodiment battery pack 50 in which the electrode leads 18A to 18D are easily connected to each other based on the first embodiment battery pack 10 described above. The battery pack 50 according to the fourth embodiment is characterized by the sealing member 51, and the same members as those in the battery pack 10 according to the first embodiment are designated by the same reference numerals and the description thereof will be omitted.
The sealing plate 51 incorporated into the opening of the battery case 14 accommodating the first to third electrode groups 11A to 11C in a stacked state via the sealing packing member 16 fitted to the inner periphery of the battery case 14 is Battery case 14 made of insulating material
It is formed in the shape of an entire disc with a diameter slightly smaller than the inner diameter of the.

Further, as shown in FIG. 8, ring-shaped first to fifth terminals 52A to 52E having different inner diameters are provided on the surface of the sealing plate 51 as insulating portions 53A to 53.
It is printed and formed in a concentric pattern through D. Although not shown, one end of the fifth terminal 52E printed and formed on the innermost peripheral side is the other end of the electrode lead drawn out from the negative electrode current collector 5 of the cell battery 1A constituting the first electrode group 11A. Are connected, whereby the fifth terminal 52E is configured as a negative electrode.

The first terminal 52A provided on the outermost peripheral portion of the sealing plate 51 has one end connected to the side portion of the positive electrode current collector 3 of the cell battery 1A constituting the first electrode group 11A. The other end side of the first electrode lead 18A drawn out from the first electrode lead drawing hole 17A formed in the packing member 16 is connected. In addition, the second terminal 52B located inside the first terminal 52A has a negative electrode current collector 5 of the cell battery 1B stacked on the upper side, which constitutes the second electrode group 11B.
The other end of the second electrode lead 18B that is connected to the side portion of the second electrode lead 18B that is connected to one side and is drawn out from the second electrode lead drawing hole 17B that is formed in the sealing packing member 16 is connected.

Further, at the third terminal 52C located inside the second terminal 52B, the side of the positive electrode current collector 3 of the cell battery 1C laminated on the lower side which constitutes the second electrode group 11B is provided. The third electrode lead-out hole 17C that is connected to one end and is formed in the sealing packing member 16
The other end of the electrode lead 18C is connected. Also, the third
The fourth terminal 52D located inside the terminal 52C of
One end is connected to the side portion of the negative electrode current collector 5 of the cell battery 1D stacked on the upper side that constitutes the third electrode group 11C, and is pulled out from the fourth electrode lead lead-out hole 17D formed in the sealing packing member 16. The other end of the separated fourth electrode lead 18D is connected.

As described above, since the electrode leads 18A to 18D are insulation-coated, the terminals 52A to 52D corresponding to the electrode leads 18A to 18D are provided.
When leading and connecting, the insulation coating at the tip is peeled off.

Since the battery pack 50 of the fourth embodiment is constructed as described above, by selecting the battery case 14 and the fifth terminal 52E as the output terminals, the first to third batteries can be obtained. Electrode groups 11A to 11C, in other words, 1.
It is possible to obtain a voltage output of 9V obtained by connecting all the 5V cell batteries 1A to 1F in series. Further, by selecting and connecting the battery case 14 and the second terminal 52B, the second and third electrode groups 11B and 11C, in other words, the cell batteries 1B to 1F can be connected in series to obtain 7. A voltage output of 0.5 V can be obtained.

Further, the battery case 14 and the fourth terminal 52
By selecting and connecting with D, the third electrode group 1
1C, in other words, a voltage output of 4.5V obtained by connecting the cell batteries 1D to 1F in series can be obtained. On the other hand, by selecting and connecting the fifth terminal 52E and the third terminal 52C, similar to the third connection example, the first and second electrode groups 11A and 11B, in other words, the cell battery. It is possible to obtain a voltage output of 4.5 V obtained by connecting 1A to 1C in series. In addition, by connecting the fifth terminal 52E and the first terminal 52A, the first electrode group 11A, in other words, 1.5V for one cell battery 1A.
Voltage output of the second terminal 52B and the third terminal 52B.
A voltage output of 3.0 V of the second electrode group 11B can be obtained by connecting the terminal 52C of the second electrode group 11B.

In the above-mentioned embodiment, the assembled battery is exemplified in which the battery group formed by stacking one or different number of cell batteries is further stacked in two layers or three layers, respectively.
The assembled battery according to the present invention may of course be combined in multiple layers, and the number of cell batteries constituting each battery group may be set arbitrarily. Although a silver oxide battery is used as the cell battery, other alkaline aqueous solution type battery or other battery may be used.

[0059]

As described in detail above, according to the assembled battery of the present invention, it is possible to take out a plurality of voltage outputs from one assembled battery mounted in an electronic device using the battery as a driving source. Therefore, it is not necessary to mount a transformer circuit on the electronic device to obtain a desired voltage, and the electronic device can be downsized and the cost can be reduced. Further, since the voltage output is taken out from each of the battery groups forming the assembled battery by the electrode lead, a stable voltage output can be taken out.

Further, since the electrode lead is shielded by the insulating resin at the opening of the cylindrical battery case accommodating a plurality of battery groups in a stacked state, the electrode lead is pulled out at the extraction portion. The occurrence of inconvenience such as short circuit of the electrode lead is surely prevented.

Further, according to the assembled battery of the present invention, a plurality of voltage outputs can be taken out and the terminals for these voltage outputs are formed concentrically on the insulating substrate, so that the terminals can be easily connected. And it becomes possible to do it accurately.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an assembled battery according to the present invention.

FIG. 2 is a vertical cross-sectional view showing an enlarged main part of the battery pack.

FIG. 3 is an enlarged vertical cross-sectional view showing an extended portion of an electrode lead of the battery pack.

FIG. 4 is a horizontal cross-sectional view showing a cross section of an opening of a battery case of the battery pack.

FIG. 5 is a vertical cross-sectional view of the assembled battery according to the second embodiment of the assembled battery according to the present invention.

FIG. 6 is a vertical cross-sectional view of an assembled battery according to a third embodiment of the assembled battery according to the present invention.

FIG. 7 is a longitudinal sectional view of an essential part of an assembled battery according to a fourth embodiment of the assembled battery according to the present invention.

FIG. 8 is a plan view illustrating a connection state between a terminal portion formed on the surface of a sealing member and an electrode lead in the same assembled battery.

[Explanation of symbols]

 1 ... Cell battery (silver oxide battery) 2 ... Positive electrode active material 3 ... Positive electrode current collector 4 ... Negative electrode active material 5 ... Negative electrode current collector 6 ... Separator 7 ... Sealing packing 10 ... Assembly battery 11 ... Battery group 14 ... Battery case 15 ... Sealing plate 16 ... Sealing packing member 17 ... Electrode lead drawing hole 18 ... Electrode lead

Claims (6)

[Claims] 1. A negative electrode formed by applying a negative electrode active material onto a negative electrode current collector formed of a metal foil, and a positive electrode formed by applying a positive electrode active material onto a positive electrode current collector formed of a metal foil. A plurality of sets of battery groups are configured by one or a plurality of thin cell batteries, which are arranged opposite to each other with a separator interposed therebetween, and these battery groups are stacked in one battery case. An assembled battery, which is configured to be housed and to draw out electrode leads for taking out an output from a battery case for each battery group. 2. The assembled battery according to claim 1, wherein a plurality of battery groups housed in a stacked state in a battery case have at least adjacent battery groups insulated from each other. 3. The assembled battery according to claim 1, wherein the battery case has a cylindrical shape. 4. The electrode lead for taking out the output of each battery group is led out along the inner peripheral surface of the battery case and is connected to the terminal while being shielded by an insulating resin at the lead-out portion. The assembled battery according to claim 1. 5. An assembled battery formed by combining a plurality of battery groups in a stacked state, wherein the terminal portions of each battery group are concentrically arranged on an insulating substrate. 6. A plurality of battery groups comprises a negative electrode formed by applying a negative electrode active material onto a negative electrode current collector formed of a metal foil, and a positive electrode active material applied onto a positive electrode current collector formed of a metal foil. And a laminated battery formed by laminating a plurality of thin cell batteries, which are arranged to face each other with a positive electrode interposed therebetween via a separator. These battery groups are laminated in one battery case. It is characterized in that the electrode leads for taking out the output, which are drawn out from the battery case for each battery group, are selected and connected to the terminal portions arranged concentrically on the insulating substrate. The assembled battery according to claim 5.