JPH08182210A - Charging apparatus of pack battery - Google Patents

Abstract

PURPOSE: To provide a small size and low price battery charging apparatus which can eliminate centralized deterioratioin of single battery of small capacity. CONSTITUTION: A charging apparatus 100 of a pack battery 11 consisting of a plurality of connected single battries 11a to 11f comprises a remaining capacity detecting means 101 for detecting remaining capacity of each battery block consisting of one or a plurality of single batteries, a charging means 102 for charging each battery block of single battery, a charging sequence control means 103 for controlling the charging sequence by the charging means 102 to the sequence of lower remaining capacity, and a time control means 104 for controlling the charging time by the charging means 102 to the specified time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery pack charging device. The present invention relates to an assembled battery (battery) charging device adopted as the motor driving power source in a power assisted bicycle in which an auxiliary driving force corresponding to a pedaling force input to a crankshaft is supplied from a motor to rear wheels, for example. The power assisted bicycle will be described below as an example.

[0002]

2. Description of the Related Art A power assisted bicycle is configured to detect a pedaling force applied to a crankshaft and supply an auxiliary driving force obtained by multiplying the pedaling force by a predetermined ratio from a motor to rear wheels. In the case of auxiliary driving by such a motor, it is necessary to periodically charge the battery of the motor.

The motor battery as described above is usually composed of a plurality of cells connected in series or in parallel, or an assembled battery formed by connecting in series and parallel. If all of these assembled batteries are charged at one time, the amount of charge may be excessive or insufficient, resulting in performance deterioration.

As a charging device capable of avoiding the above-mentioned performance deterioration, for example, there is a charging device which was previously announced at the Symposium on Automotive Engineering (No. 9405, February 1994). This is configured so that the voltage is managed for each unit cell and each unit cell is sequentially fully charged. That is, when the assembled battery connected in series is charged by the main charger, the terminal voltage of each unit cell is monitored, and when any one of the batteries reaches the charge completion voltage, charging by the main charger is performed. Stop. After that, charging is sequentially repeated for each battery unit by the battery charger for each battery, and all the battery cells are fully charged.

[0005]

However, the above-mentioned conventional charging device requires a battery charger for a single battery and a main battery charger for charging the entire battery pack, which makes the device large and expensive. There is a problem that becomes.

[0006] When the charging is stopped before use and the battery pack is used, the entire battery pack is unevenly charged.
Insufficient charging causes concentrated deterioration of battery performance.

The present invention has been made in view of the above conventional problems, and an object of the present invention is to provide a small-sized and inexpensive battery charger which can avoid concentration of deterioration of a single cell having a small capacity.

[0008]

According to a first aspect of the present invention, there is provided a battery pack charging apparatus comprising a plurality of unit cells connected to each other.
Remaining capacity detecting means for detecting the remaining capacity of each battery block consisting of one or a plurality of single cells, charging means for charging the single battery for each battery block, and the charging order by the charging means is such that the remaining capacity is low. It is characterized in that it is provided with a charging order control means for controlling in sequence and a time control means for controlling the charging time by the charging means to a predetermined time.

According to a second aspect of the present invention, in the first aspect, the charging means is of a pulse charging type, and the charging time control means is configured to charge each battery block by a plurality of pulses. It has a feature.

The battery block in the present invention is composed of one or a plurality of unit cells, and the number of the unit cells is preferably as small as possible from the viewpoint of uniformly charging the entire assembled battery.
Most preferably, one cell is used as one battery block.

[0011]

According to the battery pack charging apparatus of the present invention, the remaining capacity is detected for each battery block composed of one or a plurality of preset unit cells, and the remaining capacity is charged for a predetermined period of time in ascending order. Then, the remaining capacity is detected again, the batteries are charged again for a predetermined time in the ascending order of the remaining capacity, and this operation is repeated.

As described above, according to the present invention, since the charging is repeated for a certain period of time in the ascending order of the remaining capacity, even when the remaining capacity of the unit cells varies, each unit cell is viewed as a whole battery pack. The battery is charged substantially evenly, and concentration of deterioration on a specific battery block is avoided. Further, since the battery block having a small remaining capacity is charged first, even if the charging is terminated before the completion of charging, the battery blocks are charged relatively evenly.

Further, since it is a method of charging each battery block consisting of one or a plurality of unit cells, a small-sized charging device having a smaller output than a case where the entire assembled battery is charged at once.

[0014]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 8 are views for explaining a battery charger for a power assisted bicycle according to an embodiment of the present invention, and FIG. 1 is a left side view of a bicycle including a battery charged by the battery charger of the embodiment. 2, FIG. 2 is a partial sectional left side view of the auxiliary drive unit, FIG. 3 is a sectional view taken along the line III-III of FIG. 2, FIG. 4 is a sectional left side view of the pedaling force detection unit, and FIG. 5 is the overall structure of the drive mechanism. 6 is a characteristic diagram showing the relationship between the amount of spring displacement, sensor output, and auxiliary driving force, FIG. 7 is a block diagram of the charging device, and FIG. 8 is a flowchart for explaining the charging operation.

In the figure, reference numeral 1 is a power assisted bicycle to which the device of this embodiment is applied, and a body frame 2 of the power assisted bicycle.
Is a front fork 4 having a front wheel 3 rotatably supported.
Head pipe 2a for rotatably supporting the down pipe 2 and a down tube 2 extending rearward and obliquely downward from the head pipe 2a.
b, a seat tube 2c connected to the lower portion of the down tube 2b via a middle lug 5, a pair of left and right chain stays 2d connected to the lower end of the down tube 2b via a hanger lug 6, and the seat described above. It is composed of a pair of left and right seat stays 2e connecting the upper portion of the tube 2c and the rear end portion of the chain stay 2d. The chain stay 2d and the seat stay 2e are integrally connected via a rear wheel bracket 2f, and the rear wheel 8 is rotatably supported by the rear wheel bracket 2f.

A steering handle 7 is mounted on the upper end of the front fork 4, and the seat tube 2 is also attached.
A seat pillar tube 77, to which a saddle 75 is attached, is vertically movably inserted at the upper end of c. The seat pillar tube 77 is fixed by tightening a seat pin 78 arranged at the upper end of the seat tube 2c.

A crank shaft 13 is rotatably supported at the lower end of the down tube 2b, and pedals 17 are attached to both ends of the crank shaft 13 via cranks 16. A chain sprocket 15 is connected to the crankshaft 13 via a planetary gear type speed increasing mechanism 24, which will be described later, and the sprocket 15 is connected to a free wheel (not shown) of the rear wheel 8 via a chain 20. Has been done. As a result, the crankshaft 1
A human-powered drive mechanism that rotationally drives the rear wheel 8 by the pedaling force input to the vehicle 3 is configured. In addition, 20a is a chain cover.

An auxiliary drive device 9 is arranged on the vehicle body frame 2. The auxiliary drive device 9 supplies the rotational driving force to the rear wheels 8 via the power unit 14 by the motor 1.
2 and two batteries 1 for supplying power to the motor 12
1, 11 and a controller 21 that controls the driving force of the motor 12, and the power unit 14 combines the driving force of the motor 12 and the pedaling force of human power to transmit the resultant to the rear wheel 8. It is integrally connected to the motor 12.

The battery 11 is housed in a rectangular parallelepiped battery case 10 and is connected in series in the longitudinal direction of the case 10. The battery case 10 is disposed behind the seat tube 2c along the tube 2c, and the lower end of the battery case 10 is located at the lower end of the seat tube 2c.
It is fitted in a bottomed cylindrical support box 72 fixed to the. The upper end portion of the battery case 10 passes between the left and right seat stays 2e, 2e and projects upward, and is supported by the seat tube 2c, the left and right seat stays 2e, and the pair of left and right auxiliary seat stays 71. It can only be attached to and detached from. The battery case 1
A charging plug (not shown) is attached to 0.

The controller 21, the motor 12, and the power unit 14 are arranged below the down tube 2b along the tube, and the power unit 14 is fixed to the middle lug 5 and the hanger lug 6 via brackets 18 and 19. The controller 21 and the motor 12 are connected to the down tube 2 by a bracket (not shown).
It is fixed to b. This motor 12, controller 2
1 is covered with a cover member 79, and the cover member 79 extends along the down tube 2b.
It has a two-part structure in which the lower cover 81 is detachably attached.

The power unit 14 includes a planetary roller type speed reduction mechanism 2 in a fixed case 23 made of aluminum die cast.
5, a planetary gear type speed increasing mechanism 24, and a pedaling force detection device 44 which is a feature of this embodiment are housed. The fixed case 23 includes a case body 23a having a substantially bottomed cylindrical shape,
A lid member 23d for closing an opening formed on the left side wall of the case main body 23a, and the lid member 23d is detachably fastened to the case main body 23a by a mounting screw 23b. A cover 26 having a substantially circular shape in a side view is attached to the outside of the lid member 23d. Also, the case body 23
The flange portion of the motor 12 is fastened to the inside of the front end opening of a by a bolt 61.
a projects into the case body 23a.

The crankshaft 13 is inserted in the fixed case 23 in the vehicle width direction, and both ends of the crankshaft 13 project outside the case. This crankshaft 1
The left end of 3 is rotatably supported by the boss of the lid member 23d via a bearing 23c. A substantially cylindrical output shaft 31 is rotatably mounted on the right end of the crankshaft 13 via a bearing 42. The output shaft 31 is mounted on the boss portion of the case body 23a via the bearing 41. It is rotatably supported by. The chain sprocket 15 is splined to the outer end of the output shaft 31.

The planetary gear type speed increasing mechanism 24 is mounted on the central portion of the crankshaft 13 in the axial direction. This is a sun gear 29 rotatably supported by the crankshaft 13.
And a plurality of planetary gears 27 mounted around the sun gear 29 so as to freely rotate and revolve, and an outer peripheral gear 30 meshing with the planetary gears 27. The sun gear 29 functions as a torque plate that rotates according to the magnitude of the pedal effort. The planetary gears 27 are rotatably mounted on the crankshaft 13 via a one-way clutch 28. The one-way clutch 28 includes an inner ring 32 splined to the crankshaft 13 and the planetary gear 27. A claw piece 35 is provided between the outer ring 34 and a support shaft 27a that is rotatably supported, and the claw piece 35 is formed on the inner peripheral surface of the outer ring 34 by an urging spring 36. The structure is biased to 33.

The outer peripheral gear 30 has a substantially bowl shape, and the bottom wall of the outer peripheral gear 30 is fixed together with a ring gear 40, which will be described later, to the output shaft 31 by rivets. As a result, the pedaling force input to the crankshaft 13 by human power is transmitted to the output shaft 31 via the outer peripheral gear 30 of the planetary gear type speed increasing mechanism 24, and the chain sprocket 15,
It is transmitted to the rear wheel 8 via the chain 20. In the planetary gear type speed increasing mechanism 24, when the outer ring 34 rotates together with the inner ring 32, the outer gear 30 is prevented from rotating with respect to these members, so that the outer peripheral gear 30 is rotated in the same rotational direction at a predetermined speed ratio. Will be accelerated.

The planetary roller type reduction mechanism 25 is mounted on the rotary shaft 12a of the motor 12. This is a large-diameter cylindrical outer ring 53 fixed so as to be coaxial with the rotating shaft 12a, and a plurality of planets arranged between the outer ring 53 and the rotating shaft 12a and abutting on both of them 12a, 53. A roller 54 and a pin 55 that rotatably supports the planetary roller 54 via a bearing 62 are provided. Guide plates 57 and 58 for restricting the axial movement of the planetary rollers 54 are provided on both end surfaces of the outer ring 53. The guide plates 57 and 58 are attached to the flange portion of the motor 12 by bolts 59. Both are tightened and fixed.

Each of the pins 55 has a cylindrical carrier 5 with a bottom.
6 is fixed, and the shaft portion of the output gear member 52 is inserted into the shaft core of the carrier 56. The output gear member 52 is rotatably supported by the case main body 23a via a bearing 63, and the output gear member 52 meshes with the ring gear 40. The shaft portion of the output gear member 52 and the carrier 56 are connected to each other with a one-way clutch 51 interposed therebetween.
Prevents the pedaling force from being transmitted to the motor 12 when traveling by only human power. As a result, the driving force of the motor 12 is reduced by the planetary roller reduction mechanism 25 and the carrier 56 is reduced.
Is transmitted to the ring gear 40 via the output gear member 52, where it is combined with the pedaling force from the crankshaft 13 and transmitted to the rear wheel 8. It should be noted that 64 and 65 indicate that when an axial force is applied to the carrier 56, the carrier 56 rotates the rotary shaft 12
It is a ball for preventing the contact with the a or the output gear member 52.

On the bottom of the fixed case 23, the pedaling force detecting device 44 is arranged. This pedal force detection device 44
Is a torque plate 29a formed integrally with the sun gear 29,
A lever 46 that swings with the rotation of the sun gear 29
a, a potentiometer (pedal force detection means) 46b for detecting the turning angle of the lever 46a, and a pressurizing mechanism 47 for urging the lever 46a in a direction opposite to the turning direction of the torque plate.

A protrusion is formed on the torque plate 29a integrally formed with the sun gear 29. A wide pressing member 45 is attached and fixed to the protruding portion by a rivet, and the pressing member 45 has one end edge 46f of the lever 46a.
Is in sliding contact with. A stopper 43 screwed to the case body 23a is in contact with the protruding portion of the torque plate 29a, and the stopper 43 restricts the clockwise rotation of the sun gear 29. An input shaft 46c is bolted and fixed to the base of the lever 46a.
c is axially supported by the case body 23a by a bearing 46e. The potentiometer 4 is attached to the end of the input shaft 46c.
6b is connected, and the potentiometer 46b detects the rotation angle of the input shaft 46c.
The data is output to the controller 21 via 6d.

In the pressurizing mechanism 47, a support plate 47b is bolted and fixed to the case body 23a, and a piston portion 47a is inserted into a cylinder portion 47d fixed to the support plate 47b so that the piston portion 47a can move back and forth. A first coil spring 47c and a second coil spring 47e located inside the first coil spring 47c are arranged between the support plate 47b and the support plate 47b. The first coil spring 47c has a larger wire diameter and a shorter free length than the second coil spring 47e. The first coil spring 47c is positioned in the axial direction by fitting and fixing the left end portion in the figure to the stepped portion 47g of the piston portion 47a, and when the pedaling force is zero, the first coil spring 47c and the right end portion in the figure are positioned. A gap is provided between the support plate 47b. Further, the other end edge 46g of the lever 36a is in sliding contact with the flange portion 47f of the piston portion 47a. Thus, the piston portion 47a biases the torque plate 29a in the clockwise direction via the lever 46a.

Here, the first coil spring 47c
Is set to a spring constant corresponding to a large pedaling force of, for example, several tens of kgf, and the second coil spring 4
7e is smaller than the spring constant of the first coil spring 47c, for example, is set to a spring constant corresponding to a pedaling force of about several Kgf. As a result, as shown in Fig. 6 (a),
In a region where the pedaling force is as small as f or less, the second coil spring 4
Since only 7e is compressed and displaced, the spring constant of the pressure mechanism 47 as a whole is small, and both the second coil spring 47e and the first coil spring 47c are compressed in the region where the pedaling force is larger than f and is large. Due to the displacement, the spring constant of the entire pressurizing mechanism 44 is large. Incidentally, the alternate long and short dash line in FIG. 6 (a) shows the case of the conventional device.

As shown in FIG. 2, a vehicle speed sensor 48 is screwed into the case body 23a, and the detection portion of the vehicle speed sensor 48 is a tooth portion 40a formed at the end of the ring gear 40. They are facing each other with a small gap. The vehicle speed sensor 48 detects a change in the magnetic resistance of the tooth portion 40a associated with the rotation of the ring gear 40, and detects the change in the lead wire 4a.
It is adapted to output to the controller 21 via 8a.

The controller 21 functions as an auxiliary driving force control means, and is a potentiometer 46b.
The magnitude of the pedaling force applied to the pedal 17 is obtained from the detected value of the vehicle speed, the rotational speed is obtained from the detected value of the vehicle speed sensor 48, and the auxiliary driving force is calculated based on the built-in map.
The battery 11 is configured to supply a current corresponding to the auxiliary driving force to the motor 12. This auxiliary driving force is set to less than 1 with respect to the pedal effort 1 of the occupant, and gradually decreases when the rotation speed exceeds, for example, 15 km / h, and becomes zero when it reaches 24 km / h. It has been set. In addition, the controller 2
1, a main switch 22 and a warning lamp (not shown) for displaying a battery voltage drop and a system abnormality are provided.

The controller 21 has a low pedaling force map for calculating an auxiliary driving force corresponding to a low pedaling force region of f or less and a high pedaling force map for calculating an auxiliary driving force corresponding to a high pedaling force region of f or more. Built in types. As shown in FIG. 6 (b), the sensor output is proportional to the turning angle of the lever 46a, and thus to the displacement amount of the coil spring. However, in this embodiment, the spring constant is small in the low pedaling force range, so the spring displacement amount is small. As shown in Fig. 6 (a), changes significantly in the low pedaling range than in the high pedaling range. Therefore, the sensor output changes more greatly in the low pedaling range than in the high pedaling range as shown in FIG. 6 (c). Therefore, it is configured to switch to either the low pedaling force map or the high pedaling force map depending on whether the sensor output is smaller or larger than the point a (see FIG. 6 (d)).

In FIG. 7, reference numeral 100 denotes a charging device for the battery (assembled battery) 11, which is a 12V battery consisting of six cells (unit cells) 11a to 11f, and the cells 11a at both ends. , 11f are connected to the external connection terminals 12a and 12b, and five intermediate terminals 12c ... 12c connected between the cells are provided. In this embodiment, each cell is one battery block. There is.

The charging device 100 has the function shown in FIG. 7, and specifically, as shown in FIG.
Remaining capacity detection function 101 for detecting the remaining capacity for each of a to 11f
And a charging function 102 that performs pulse charging for each cell,
A charging order control function 103 for controlling the charging order by the charging function 102 from the detected cells having smaller remaining capacities to larger cells in sequence, and the charging time by the charging functions 102 is a preset predetermined time. As described above, specifically, a charging time control function 10 for controlling a plurality of pulses as one unit to be charged one unit at a time
4 and.

Next, the function and effect of this embodiment will be described. The auxiliary driving device 9 of the present embodiment supplies a larger auxiliary driving force as the pedestrian's pedal effort increases when the speed is below a predetermined value (for example, 15 km / h), and increases when the speed exceeds the above-mentioned predetermined value. The auxiliary driving force is decreased as the speed increases, and the auxiliary driving force becomes zero when the speed exceeds the maximum value (for example, 24 Km / h). In this way, it is possible to reduce labor during uphill driving, head wind, and starting.

Specifically, in the motor drive circuit, a current corresponding to the auxiliary driving force is supplied from the battery 11 to the motor 12 by the control pulse signal from the controller 21. Then, when the vehicle travels a predetermined traveling distance, the battery 11 is charged by the charging device 100.

The charging operation will be described with reference to the flowchart of FIG. When the battery 11 is charged, when the external connection terminals 12a, 12b and all the intermediate terminals 12c of the battery 11 are connected to the charging device 100, the battery blocks (cells) are switched and the remaining capacity thereof is detected, The detected capacity is stored in the memory (step S
1 to S4), it is determined whether or not the number of battery blocks (the number of cells) for which the remaining capacity has been detected has reached a preset number n (for example, 6) (step S5). Switching, remaining capacity detection, and memory operation are repeated.

When the remaining capacity detected battery block number becomes n, it is judged whether or not there is a defective battery block, for example, a battery block having a preset remaining capacity or less (step S6). Is displayed abnormally (step S7), and the charging operation is terminated.

If there is no defective block, it is judged whether or not the charging is completed depending on whether or not the remaining capacities of all the battery blocks are equal to or more than a preset capacity (step S9). Indicates completion (step S10), and the charging operation ends.

When the charging is not completed, the charging order 1st to mth (1st to 6th in this embodiment) is determined in the ascending order of the detected remaining capacity. The charging order is stored in the memory (steps S11 and S12).
One unit of pulse charging is performed on the determined first battery block of the charging order, and battery block switching and one unit of pulse charging are repeated until the sixth battery block is sequentially charged (step S13). ~ S1
5).

When all the battery blocks of the first to sixth charging orders are charged in this way, the process returns to step S2, and the remaining capacity of each battery block (cell) is detected again, the charging order is determined, and one unit is determined. Each of the pulse charging operations is repeated until the remaining capacities of all the battery blocks reach the preset capacities.

As described above, in the present embodiment, pulse charging is performed for each unit of a plurality of pulses for each battery block (cell) having a small remaining capacity, so that the battery can be charged even when the remaining capacity of the cell varies. The battery is charged almost evenly as a whole, and the concentration of deterioration on a specific cell is avoided. In addition, since cells with a small remaining capacity are charged first, even if the charging is terminated before the completion of charging, the cells will be charged relatively evenly.

Since the battery block is charged for each battery block consisting of one cell, a small charger with a small output is sufficient.

Further, in the present embodiment, when the pedal effort is detected, only the second coil spring 47e having a small spring constant is displaced in the area where the pedal effort is as small as f or less, and the spring is further provided in the area where the pedal effort is not less than f. Since the first coil spring 47c having a large constant is also displaced, the detection accuracy in the low pedaling force region can be improved without narrowing the detection range in the high pedaling force region, and the assist to the pedaling force can be smoothly performed. As a result, the assist does not suddenly work as in the case where the spring constant is constant, and the variation in the auxiliary driving force can be reduced to improve the assist feeling.

Further, in the conventional apparatus, there is a phenomenon in which the motor driving current becomes large at the time of a pulse when it is detected only when the pedaling force becomes larger than a certain amount, and as a result, the durability of the battery is shortened by the rapid change of the motor driving current. There was a problem of lowering. In the present embodiment, the pedaling force can be reliably detected even in the region where the pedaling force is small, and the pulse-like change of the motor drive current is suppressed, and as a result, the durability of the battery can be improved.

Furthermore, in the present embodiment, the low pedaling force map for calculating the auxiliary driving force corresponding to the low pedaling force region and the high pedaling force map for calculating the auxiliary driving force for the high pedaling force region are provided. The assist ratio can be controlled to a constant value in response to variations in sensor output characteristics in the pedaling force range and high pedaling force range.
From this point as well, the assist feeling can be improved.

That is, when the spring displacement characteristic is changed between the low pedaling force range and the high pedaling force region as in the present embodiment, there is a concern that the auxiliary driving force may change significantly in the low pedaling force region due to a slight change in the pedaling force. However, in this embodiment, since the two sensor output (varied position) -auxiliary driving force maps are provided, the assist characteristic can be made constant even if the spring displacement characteristic changes.

In the above embodiment, each of the six cells of the 12V battery is used as a battery block to detect the remaining capacity of each battery block, determine the charging order, and perform pulse charging. Alternatively, it may be composed of a plurality of cells (single cells), and of course, it can be applied to charging a battery having a higher voltage and a larger capacity.

[0050]

As described above, according to the battery pack charging apparatus of the present invention, the remaining capacity is detected for each preset battery block consisting of one or a plurality of single cells, and each of the batteries is detected. Since the blocks are charged for a predetermined time in the ascending order of remaining capacity, even if the remaining capacity of a single battery varies, the entire battery pack can be charged almost equally and the specific battery block can be charged. This has the effect of avoiding deterioration and concentration.

Further, since the battery block having a small remaining capacity is charged first, there is an effect that even if the charging is stopped before the completion of charging, the battery pack can be charged relatively uniformly as a whole.

Furthermore, since charging is performed for each battery block consisting of one or a plurality of cells, there is an effect that the charging device can be a small one with a small output.

[Brief description of drawings]

FIG. 1 is a left side view of a power-assisted bicycle including a battery charged by a charging device according to an embodiment of the present invention.

FIG. 2 is a partial cross-sectional side view of an auxiliary drive device portion of the bicycle of the above embodiment.

FIG. 3 is a sectional plan view of the auxiliary drive device (II-II in FIG. 2).
It is a line sectional view).

FIG. 4 is a partial cross-sectional side view showing a main part of the auxiliary drive device.

FIG. 5 is a block diagram of a drive system of the bicycle according to the embodiment.

FIG. 6 is a characteristic diagram of the pedal effort detection device portion of the bicycle of the above-described embodiment.

FIG. 7 is a block diagram of the apparatus of the above embodiment.

FIG. 8 is a flow chart for explaining the operation of the apparatus of the above embodiment.

[Explanation of symbols]

 Reference Signs List 11 battery packs (batteries) 11a to 11f battery blocks (cells-cells) 100 charging device 101 remaining amount detection function (remaining amount detection means) 102 charging function (charging means) 103 charging order control function (charging order control means) 104 Charging time control function (charging time control means)

Claims (2)

[Claims] 1. A battery pack charging apparatus comprising a plurality of unit cells connected to each other, and a remaining amount detecting means for detecting a remaining capacity of each battery block formed of one or a plurality of unit cells. Charging means for charging each battery block, charging order control means for controlling the charging order by the charging means so that the remaining capacity is in ascending order, and charging time control means for controlling the charging time by the charging means to a predetermined time. An assembled battery charging device comprising: 2. The assembled battery according to claim 1, wherein the charging means is of a pulse charging type, and the charging time control means is configured to charge each battery block by a plurality of pulses. Charging device.