JP2005166493A - Power storage device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an assembled power storage device for switching a circuit connecting a large number of power storage cells in series or in parallel without using a switching element or the like.
An assembled battery device (1) includes seven positive terminals (21) and seven negative terminals (22) connected to a positive electrode (11) and a negative electrode (12) of each electric storage cell (10), and the vicinity of the positive electrode terminal (11) of the electric storage cell (10). Six bypass conductive plates 31 extending in the vicinity of the negative electrode terminal 22 of the matching storage cell 10, and six slides supported so as to be slidable on the positive electrode terminals 21, the negative electrode terminals 22, and the bypass conductive plates 31. Conductive plates 23, 24 and parallel connection positions for connecting the respective storage conductive plates 23, 24 to each other, and connecting the respective storage cells 10 in parallel by connecting the adjacent positive electrode terminals 11 to each other and connecting the adjacent negative electrode terminals 12 to each other. In addition, a switching mechanism 40 is provided that switches each positive electrode terminal 21 and each negative electrode terminal 22 to each bypass conductive plate 31 and switches the storage cells 10 to a series connection position in series.
[Selection] Figure 1

Description

  The present invention relates to an assembled power storage device that connects a plurality of power storage cells by switching them in series or in parallel.

  Conventionally, as this type of assembled power storage device, high voltage is output by a circuit that connects each storage cell in series at the time of output, while each storage cell is evenly charged by switching to a circuit that connects each storage cell in parallel at the time of charging There is something to do.

An electric circuit element such as a switching element is used to switch between a circuit that connects each storage cell in series and a circuit that is connected in parallel.
Japanese Patent Laid-Open No. 11-7341 Japanese Patent Laid-Open No. 5-137265

  However, in such a conventional assembled power storage device, since the circuit is switched using a switching element or the like, when the number of power storage cells increases, the number of switching elements or the like also increases and the circuit becomes complicated. There was a problem of incurring a cost increase.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a combined power storage device that switches a circuit that connects a large number of power storage cells in series or in parallel without using a switching element or the like.

  1st invention is applied to the assembled electrical storage apparatus which switches and connects several electrical storage cells in series or parallel.

  And a plurality of bypass conductive plates extending in the vicinity of the positive electrode terminal and the negative electrode terminal of the adjacent storage cell, and a plurality of slide conductive plates supported so as to be slidable in contact with each positive electrode terminal, each negative electrode terminal, and each bypass conductive plate And a parallel connection position for connecting each storage cell in parallel by connecting each positive electrode terminal and each adjacent negative electrode terminal to each other, and each positive electrode terminal and each negative electrode terminal respectively. And a switching mechanism for switching to a series connection position for connecting each storage cell in series by conducting to the bypass conductive plate.

  A second invention is characterized in that, in the first invention, a positive electrode terminal and a negative electrode terminal are arranged at both ends of the storage cell, and each bypass conductive plate is linearly extended so as to be inclined with respect to each storage cell. To do.

  According to a third invention, in the first or second invention, a positive electrode terminal and a negative electrode terminal are arranged at both ends of the electric storage cell, and the switching mechanism is arranged in a row of the electric storage cells so as to sandwich the positive electrode terminal and the negative electrode terminal of each electric storage cell. A pair of rods extending in the direction is provided, a slide conductive plate is fixed to each rod, and each rod is moved in the column direction of each storage cell to switch between a parallel connection position and a series connection position. It was supposed to be.

  According to the first invention, the switching mechanism moves each slide conductive plate to switch between a series circuit that connects the storage cells in series and a parallel circuit that connects the storage cells in parallel. Even when the number of storage cells is increased without using an electric circuit element such as a switching element, the circuit can be easily handled without complication.

  According to the second invention, since each bypass conductive plate is inclined in a straight line to each storage cell and extends in a straight line, the positive electrode terminal and the negative electrode terminal of the adjacent storage cell are connected with the shortest distance to suppress the length of the series circuit. Therefore, the loss can be reduced.

  According to the third invention, since the switching mechanism is configured to move each slide conductive plate via each rod, the assembled power storage device can be reduced in size.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  As shown in FIGS. 1 and 2, the assembled power storage device 1 is mounted as, for example, a secondary battery of an electric scooter, and is charged from an external power source while the vehicle is stopped, and is output to a load such as a motor while traveling. The assembled power storage device 1 includes seven power storage cells 10 as one module, and is used by combining any number of modules according to required power. The number of power storage cells 10 and the like housed in the assembled power storage device 1 is not limited to this and is arbitrarily set.

  The battery assembly 1 includes seven positive terminals 21 and seven negative terminals 22 connected to the positive electrode 11 and the negative electrode 12 of each electric storage cell 10, and the electric storage cell 10 adjacent to the vicinity of the positive electrode terminal 21 of the electric storage cell 10. Six bypass conductive plates 31 extending in the vicinity of the negative electrode terminal 22, six positive electrode terminals 21, six negative electrode terminals 22, and six slide conductive plates 23 supported to be slidably contacted with the bypass conductive plates 31, As shown in FIG. 1, each slide conductive plate 23 is electrically connected to each adjacent positive electrode terminal 11, and each slide conductive plate 24 is electrically connected to each adjacent negative electrode terminal 12 to connect each storage cell 10 in parallel. As shown in FIG. 2, each slide conductive plate 23, 24 is moved, and each positive electrode terminal 21 and each negative electrode terminal 22 are electrically connected to each bypass conductive plate 31, respectively. 0 and a switching mechanism 40 for switching the series connection positions connected in series.

  These power storage cells 10 have a cylindrical shape, and have a positive electrode 11 and a negative electrode 12 at both ends thereof. The storage cell 10 is charged and discharged through the positive electrode 11 and the negative electrode 12. For example, a lead acid battery, a nickel cadmium battery, a nickel hydride battery, a chemical secondary battery such as a lithium ion battery, or an electric double layer capacitor (capacitor) is used as the storage cell 10.

  In addition, each storage cell 10 is housed in a casing (not shown), and the positive electrode 11 and the negative electrode 12 are arranged so as to be aligned on the straight line at equal intervals.

  Each positive electrode terminal 21, each negative electrode terminal 22, and each bypass conductive plate 31 are each made of a conductive material and fixed to the casing.

  Each positive electrode terminal 21 and each negative electrode terminal 22 are disposed on two straight lines extending in parallel, and are in contact with the positive electrode 11 and the negative electrode 12 of each storage cell 10 housed in the casing. A gap is provided between each adjacent positive electrode terminal 21 and each adjacent negative electrode terminal 22 so as to be insulated from each other.

  Each bypass conductive plate 31 is formed in a flat plate shape that is inclined with respect to each storage cell 10 and extends linearly. One end 32 of each bypass conductive plate 31 is arranged in the vicinity of the positive electrode terminal 21, and the other end 33 of each bypass conductive plate 31 is arranged in the vicinity of the negative electrode terminal 22. The positive electrode terminal 21 and the negative electrode terminal 22 in which both ends 32 and 33 of the bypass conductive plate 31 are adjacent to each other are adjacent to each other in the storage cell 10.

  The switching mechanism 40 includes a pair of rods 41 and 42, and each rod 41 and 42 extends in the column direction of each storage cell 10 so as to sandwich the positive electrode terminal 21 and the negative electrode terminal 22 of each storage cell 10. Each rod 41, 42 is slidably supported in the casing.

  The slide conductive plates 23 and 24 are made of a conductive material and are fixed to the rods 41 and 42 of the switching mechanism 40. The slide conductive plates 23 and 24 are aligned and arranged so as to be arranged at equal intervals.

  The rods 41 and 42 are driven by an actuator 43 to move the slide conductive plates 23 and 24 to switch between the parallel connection position shown in FIG. 1 and the series connection position shown in FIG. As the actuator 43, for example, a motor, a solenoid or the like is used.

  The switching mechanism 40 may not include the actuator 43, and the rods 41 and 42 may be moved manually.

  Next, the operation will be described.

  At the time of output of the battery pack 1, as shown in FIG. 2, the slide conductive plates 23 and 24 are switched to the serial connection position, and the positive electrode terminals 21 and the negative electrode terminals 22 are electrically connected to the bypass conductive plates 31. A series circuit in which the storage cells 10 are connected in series is configured, and a load is connected to the series circuit to output a high voltage.

  When charging the battery pack 1, as shown in FIG. 1, the slide conductive plates 23, 24 are switched to the parallel connection position so that the slide conductive plates 23 are electrically connected to each other adjacent positive electrode terminals 11. 24 constitutes a parallel circuit in which the negative electrode terminals 12 adjacent to each other are electrically connected to connect the storage cells 10 in parallel, and charging is performed by connecting an external power source to the parallel circuit. Thus, by charging the storage cells 10 connected in parallel, the storage cells 10 are charged evenly, and the charging efficiency is improved. When charging is performed with the storage cells 10 connected in series, there is a variation during charging due to individual differences of the storage cells 10, for example, capacitance or discharge difference. However, according to the assembled storage device 1 of the present invention. This problem can be solved.

  The assembled battery device 1 moves to the series circuit that connects the battery cells 10 in series and the parallel circuit that connects the battery cells 10 in parallel by moving the slide conductive plates 23 and 24. Thus, the use of an electric circuit element such as a switching element avoids the complexity of the circuit. And also when increasing the number of the electrical storage cells 10, it can respond easily, without complicating a circuit.

  Since each bypass conductive plate 31 is formed in a flat plate shape that is inclined with respect to each storage cell 10 and extends linearly, the positive electrode terminal 21 and the negative electrode terminal 22 of the adjacent storage cell 10 are connected in the shortest distance, and a series circuit It is possible to reduce the loss by suppressing the length.

  Since the switching mechanism 40 has a structure in which the slide conductive plates 23 and 24 are moved via the rods 41 and 42, the battery pack 1 can be downsized.

  Since each power storage cell 10 and each plate-like bypass conductive plate 31 are arranged side by side, an increase in the size of the assembled power storage device 1 can be avoided.

  The present invention is not limited to the above-described embodiment, and it is obvious that various modifications can be made within the scope of the technical idea.

  The assembled power storage device of the present invention can be used, for example, in power storage devices mounted on electrical products such as cameras, videos, and portable personal computers, and transportation equipment such as electric vehicles, hybrid vehicles, and electric scooters.

(A) is a side view of the assembled power storage device in parallel connection showing an embodiment of the present invention, and (b) is a plan view of the same. (A) is a side view of the assembled power storage device at the time of series connection similarly showing the embodiment of the present invention, (b) is a plan view, and (c) is a front view.

Explanation of symbols

1 set power storage device 10 storage cell 11 positive electrode 12 negative electrode 21 positive electrode terminal 22 negative electrode terminal 23, 24 slide conductive plate 31 bypass conductive plate 40 switching mechanism 41, 42 rod 43 actuator

Claims (3)

In a battery assembly that connects a plurality of power storage cells by switching in series or in parallel,
A plurality of bypass conductive plates extending across the vicinity of the positive electrode terminal and the negative electrode terminal of the adjacent storage cell;
A plurality of slide conductive plates supported in a slidable contact with each positive electrode terminal, each negative electrode terminal, and each bypass conductive plate;
Each slide conductive plate is electrically connected to each other adjacent positive electrode terminals, and each adjacent negative electrode terminal is electrically connected to each other to connect each storage cell in parallel, and each positive electrode terminal and each negative electrode terminal is connected to each bypass conductive material. A battery assembly comprising: a switching mechanism configured to switch to a serial connection position where the power storage cells are connected in series by being electrically connected to a plate. The positive electrode terminal and the negative electrode terminal are arranged at both ends of the storage cell,
The assembled power storage device according to claim 1, wherein each of the bypass conductive plates is linearly extended so as to be inclined with respect to each of the power storage cells. The positive electrode terminal and the negative electrode terminal are arranged at both ends of the storage cell,
The switching mechanism includes a pair of rods extending in the column direction of each storage cell so as to sandwich the positive electrode terminal and the negative electrode terminal of each storage cell,
Fix the slide conductive plate to each rod,
3. The battery assembly according to claim 1, wherein each rod is moved in the column direction of each power storage cell to switch between a parallel connection position and a series connection position.

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