KR980012771A - Charging device - Google Patents

Abstract

The present invention relates to a charging device that can charge a primary battery by a mistake, leak a large amount of electrolyte from the primary battery, and avoid firing and firing at low cost without installing a special circuit even when the charging is continued. Which is provided with a charging circuit for charging a secondary battery by inputting a commercial power supply, an engine provided with an input terminal for connecting the commercial power supply to the charging circuit, and a battery accommodating portion for accommodating the secondary battery An opening is provided in the substrate portion of an area sandwiched between the input terminals on at least the substrate.

Description

Charging device

FIG. 1 is a plan view, a side view, and a bottom view of a charging apparatus according to an embodiment of the present invention;

FIG. 2 is a side sectional view of the filling device,

FIG. 3 is a block diagram showing a configuration example of a charging circuit in the charging device. FIG.

4 is a cross-sectional view of a main part of the filling apparatus,

FIG. 5 is a cross-sectional view of a main part of the filling apparatus,

6 is a block diagram showing a configuration of a pulse charging circuit according to another embodiment of the present invention;

FIG. 7 is a block diagram showing the signal waveforms at each point of the pulse charging circuit according to the embodiment,

Fig. 8 is a power waveform diagram of a pulse charging circuit according to the embodiment; Fig.

FIG. 9 is a block diagram showing a configuration of a pulse charge circuit according to another embodiment of the present invention;

FIG. 10 is a block diagram showing a configuration of a conventional pulse charging circuit;

FIG. 11 is a current waveform and signal waveform at each point of the pulse charging circuit of FIG. 10,

FIG. 12 is a power wave form for a conventional constant current charger and a conventional pulse charge pump.

Description of the Related Art [0002]

10: Charging device 11: Upper case

12: Lower case 13: Battery compartment

14: Power input part 15:

16, 23: Flux storage part 17:

18: Charging terminal + side 19: Charging terminal - side

20: Display LED element 21: Flux connection terminal

22: transformer 24a, 24b: power input terminal

25: openings 26a and 26b of the power input terminal region: connecting terminal

27a, 27b: wiring 28: opening for storing a flux

29: opening in the area between terminals for connection 40:

41, 42: secondary battery 43, 44: switch circuit

45: pulse generating circuit 46, 47: AND circuit

48: NOT circuit 49: T-type flip-flop

51, 52: charge control circuit 53, 54: temperature detection element

The present invention relates to a charging apparatus for charging a secondary battery. Currently, rechargeable secondary batteries have been actively used in place of primary batteries that are used and discarded. In conjunction with this, the charging device for charging the secondary battery has been improved in terms of function, performance and price. As another improvement point of the charging apparatus, it is important to mention about safety in addition to the above. According to the results of experiments conducted under a harsh environment for the charging device of the chestnut, according to the conditions such as the charged state of the battery, the number of times of use, the environmental temperature, etc., when the primary battery of the battery is charged incorrectly, There is something to be done. The leaked electrolytic solution intrudes into the charging device from the charging terminal portion in the battery accommodating portion and becomes friendly to the substrate on which the charging circuit is mounted. If the electrolytic solution leaks a large amount, the electrolytic solution contacts between the terminals connected to the commercial power source provided on the substrate or between the terminals of the transformer primary in the charging circuit of the type in which the transformer primary side on the substrate is connected to the commercial power source, Thereby lowering the insulation resistance. If the operation of the charging device is continued in this state, heat may be generated due to insulation failure, and the substrate between terminals may be fumed, resulting in fuming. Also, depending on the conditions such as leakage of a very large amount of electrolyte, the possibility of ignition can not be totally excluded. It is common practice for the manufacturer to warn the user not to charge the primary battery by inserting a note on the instruction manual or the main body of the charging apparatus. However, it is inevitable that a user consciously or unconsciously charges the primary battery only by leaving it to the user's attention. Therefore, a method of judging whether a battery set in the charging apparatus is a primary battery or a secondary battery is a method of notifying the battery type discriminating circuit that the charging circuit itself is not operated when a non-rechargeable primary battery is set. However, in this method, a complicated battery type discrimination circuit is required and the charging apparatus becomes expensive. As described above, in the conventional charging apparatus, when the primary battery such as a dry battery is charged, the electrolytic solution may leak from the primary battery, and the insulation failure between the power input terminals directly connected to the commercial power source Resulting in fuming and ignition. In addition, if a battery type discriminating circuit for discriminating whether the battery set in the charging device is a primary battery or a secondary battery is provided and the charging circuit is not operated in the case of the primary battery, a battery type discriminating circuit is required There is a drawback that the charging device becomes an expensive value. The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide an apparatus and a method for charging and discharging a battery, which is capable of avoiding fuming and ignition even when electrolytic solution leaks from the primary battery by charging the primary battery by a mistake, And a charging device that can be realized with a high reliability. According to an aspect of the present invention, there is provided a plasma display apparatus comprising: a substrate having a charging circuit for charging a secondary battery by receiving power from a commercial power source, and a plurality of power input terminals connected to the commercial power source; Wherein a battery accommodating portion for accommodating the secondary battery is provided in the same optical packing body, wherein an opening is provided in a region between the plurality of power input terminals of the substrate. In addition, a charging circuit for charging a secondary battery is provided by receiving a power supply from a commercial power supply, and a plurality of power input terminals connected to the commercial power supply, wiring from a power input terminal of the corresponding cooking water and wiring from the charging circuit And a battery accommodating portion for accommodating the secondary battery is provided in the same optical fiber. And openings are provided in regions between the plurality of power input terminals of the engine and regions between the plurality of connection terminals. In the charging apparatus thus configured, an opening is provided in a region between the power input terminals connected to the commercial power source on the board, so that when the primary battery is charged by a mistake, the electrolyte solution leaked from the primary battery is discharged from the battery accommodating portion The chip is discharged through the opening, so that the contact between the power input terminals by the electrolytic solution is prevented. Therefore, even if the charging state continues in this state, the occurrence of the heat due to the insulation failure is frozen, thereby eliminating the possibility that the substrate between the power input terminals is ignited by firing. When an opening is provided in a region between a plurality of power input terminals on the board and a plurality of connection terminals for connecting the wirings from the charging circuit, if the primary battery is charged by a mistake, Even if the electrolytic solution intrudes into the charging apparatus from the battery housing, even if the electrolytic solution gets into the charging apparatus from the battery accommodating portion through the opening, the electrolytic solution is discharged through the opening, so that the connection between the power input terminals by the electrolytic solution is prevented . Therefore, even if the charging device continues to operate in this state, the occurrence of heat due to the insulation failure can be avoided due to the possibility that the substrate between the power input terminals is burned and ignited. Further, according to the present invention, a special circuit such as a battery type discriminating circuit for determining whether the battery set in the charging apparatus is a rechargeable secondary battery can be achieved only by providing an opening in the substrate, The charging device can be realized simply and inexpensively. The charging circuit in the charging apparatus of the present invention preferably comprises a charging power supply for receiving a power supply from a commercial power supply and outputting a constant current and a plurality of charging circuits for charging the secondary battery with a constant current from the charging power supply, And control means for controlling the pulse charging means so that the timings of the ON states of the pulse charging waveforms outputted by the plurality of pulse charging means do not overlap each other. Still more preferably, the plurality of pulse charging means are configured to simultaneously charge two or more two batteries of the same number. And the control means exclusively selects the pulse charging means in which the pulse charging waveform becomes the ON state. The plurality of pulse charging means may include full charge detecting means for detecting full charge of the secondary battery and control of the control means when the full charge is detected by the full charge detecting means And means for completing the charging. As described above, in the charging circuit of the present invention, when a plurality of secondary batteries are pulse-charged, a plurality of secondary batteries are provided for the pulse charging means, and the control means controls the ON state of the pulse charging waveform output from the pulse charging means of each system It is possible to reduce the amount of the secondary battery charged at a certain time from the total number of the secondary batteries on the charging base, so that the increase in the maximum power consumption can be suppressed. That is, in this charging circuit, it is possible to charge the same number of secondary batteries at the same time as the conventional one without increasing the maximum power consumption, thereby avoiding enlargement of the main body of the charging apparatus. In addition, since the same number of secondary batteries can be charged in the same time as the conventional one for increasing the maximum power consumption, the number of secondary batteries that can be charged at the same time when the maximum power consumption is equal to that of the conventional pulse charging circuit Can be increased. Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a plan view of a charging apparatus according to an embodiment of the present invention. FIG. 1 (a) is a plan view, FIG. 1 (b) is a side view, and FIG. The photoreceptor of the charging apparatus 10 is composed of two parts: an upper case 11 and a lower case 12. The upper case 11 is provided with an opening for receiving a secondary battery in the battery accommodating portion 13. [ The lower case 12 is provided with an opening for rotating the movable type of the float 15 accommodated in the flock receiving portion 16. The battery accommodating portion 13 is provided with a leaktight charging terminal 18 and a -charging terminal 19 to which wired lines are connected from an uncharged charging circuit. The display case 11 is provided with a display LED element 20 as a parking lamp. In this embodiment, a charging device for charging a single-type secondary battery and a single-phase secondary battery at two concurrently is exemplified. 2 is a side sectional view of the charging apparatus of the present embodiment. 2, the movable block 15 is accommodated in the main body of the charging device 17 when the filling device 10 is not in use. When the charging apparatus 10 is used, the movable type of the float 15 is rotated around an axis not shown and taken out of the body as shown in FIG. 1 (b). The movable block 15 is electrically coupled to the plug connection terminal 21 in the state of FIG. 1 (b) and is connected to an internal circuit such as the transformer 22 via wiring (not shown) on the substrate 17. That is, the power supply of the commercial power source is supplied to the primary pole of the transformer 22 from the movable type flux 15 inserted in the power outlet through the flux connection terminal 21 and the wiring (not shown) on the substrate 17 do. The transformer 22 lowers the commercial power supply voltage to a predetermined voltage and supplies it to the charging circuit from the secondary side. When the movable block 15 is inserted into a power outlet (not shown) and the secondary battery is set in the battery accommodating portion 13, the LED drive circuit for turning on or off the display LED element 20 such as red Off) to indicate that the battery is being charged. Thereafter, when the charging is completed, the display LED element 20 is turned off (or lighted) to indicate completion of charging. As shown in Figs. 1 and 2, the charging device 17 of the embodiment has a battery accommodating portion 13, movable flexible 15, flush connection terminals 21, The power input unit 14 including the transformer 22 and the like is constituted by the same optical axis. The battery accommodating portion 13 and the charge inputting portion 14 are spatially connected by holes or the like in the vicinity of the charging terminal portions 18 and 19 without being partitioned for exchange. FIG. 3 is a view showing a configuration example of a charging circuit mounted on the substrate 17. FIG. In the figure, reference numerals 30a and 30b denote connection terminals for commercial power, 31 denotes a power supply, 32 denotes a rectifier circuit, 33 denotes a constant current circuit, 34 denotes a timer, . "36" is a single cell, and "37" is a single cell. The power supply section 21, the rectification circuit 32, the constant current circuit 33, the timer section 34 and the resistor 35 are mounted on the substrate 7 of the second degree. The power supply unit 31 includes a transformer 22 in the second stage and drops commercial power supply voltage to a predetermined voltage. The charging time is set in advance in the timer section 34 and the timer section 34 starts the revelation by the set of the secondary batteries 36 and 37. [ When the charging time has elapsed, the operation of the constant current circuit 33 is stopped by the operation of the timer section 34, and the charging is completed. It is also possible to control the interruption of the charging operation by using a well-known means for detecting whether or not the charging has actually been completed. The main part of the charging apparatus according to the present embodiment shows a configuration example in FIG. In the figure, "23" is the flux number of the upper case 11, "24a", "24b" is the power input terminal. Reference numeral 25 denotes an opening between the front input terminals 24a and 24b and reference numerals 26a and 26b denote connection terminals for a charging circuit not shown and reference numerals 27a and 27b denote power input terminals 24a and 24b And connecting terminals 26a and 26b, and 28 denotes a plug receiving opening. In FIG. 4, the movable type float 15 is shown in a state in which it is housed in the float storage portion 23. The power input terminals 24a and 24b on the substrate 17 are connected to the movable pulley 15 by the flock connecting terminals 21 when the movable type float 15 is rotated to be usable as in the second aspect. The terminals 24a and 24b are connected to the connection terminals 26a and 26b by a pair of wiring lines 27a and 27b which are installed by tilting the plug receiving opening 28. [ Commercial power supply electric power is supplied from the connection terminals 26a and 26b to a power supply circuit (not shown) in the charging circuit. Here, the opening 25 provided in the area between the power input terminals 24a and 24b on the substrate 17 is characterized by the present invention, and at least a part of the part thereof on the shortest line between the power input terminals 24a and 24b As shown in Fig. As described above, in the charging apparatus 10, the battery accommodating section 13 and the power input section 14 are formed of the same optical element, and their spaces are not completely partitioned. In such a charging device 10, when a primary battery such as a non-rechargeable battery is charged, the electrolyte may leak from the primary battery due to manufacturing conditions such as the charged state, the use frequency, and the environmental temperature of the primary battery . The leaked electrolytic solution penetrates into the charging device 10 from the battery accommodating portion 13 and fits on the charging circuit mounting board 17. Conventionally, when a terminal connected to the commercial power source is filled with the leaked electrolyte, The resistance is deteriorated and the substrate between the terminals rises and fires, possibly leading to ignition. On the other hand, in the charging apparatus 10 of the present embodiment, even if a large amount of electrolyte is leaked, since the opening 25 for removing the substrate 17 is provided between the power input terminals 24a and 24b, (24a) and (24b). Therefore, the insulation resistance between the power input terminals 24a and 24b is not deteriorated by the electrolytic solution. Even if the charging device 10 continues to operate in this state, heat due to the leading edge failure occurs or the substrate 17 rises The possibility of causing fumes or ignition can be excluded. According to the present embodiment, since the desired purpose can be achieved only by providing the opening 25 in the substrate 17, it is possible to determine whether the battery set in the charging device 10 is a rechargeable secondary battery or a primary battery It is very simple and does not require a battery type discrimination circuit to be discriminated, and it is possible to prevent firing ignition at an inexpensive value. Next, another embodiment of the present invention will be described with reference to FIG. The present embodiment is most suitable for a charging circuit in which the primary side of the transformer 22 is connected to the commercial power supply as in the case of the case of the serialise regulator method. In the present embodiment, an opening 25 is provided in a region between the power input terminals 24a and 74b of the substrate 17, and the same reference numerals are given to the same portions as in the fourth embodiment, In addition, the present embodiment is different from the previous embodiment in that an opening 29 is also provided in a region between the connection terminals 26a and 26b. The opening 29 is provided so as to occupy at least a portion on the shortest line between the connection terminals 26a and 26b. The connection terminals 26a and 26b are connected to the primary side of the transformer 22. These contact terminals 26a and 26b and the power supply input terminals 24a and 24b connected to the commercial power supply are connected by the wiring lines 27a and 27b. Also in the present embodiment, the battery accommodating section 13 and the power input section 14 are formed of the same optical axis, and the spaces are not completely partitioned. In such a charging device, when a primary battery such as a non-rechargeable battery is charged, the electrolyte may leak from the primary battery due to conditions such as the charged state, the number of times of use, and the ambient temperature of the primary battery All. The leaked electrolytic solution penetrates the inside of the charging device from the battery accommodating portion 13 and travels on the substrate 17 on which the charging circuit is mounted. In the circuit in which the primary side of the transformer on the engine side is connected to the commercial power source, if the insulation between the terminals connected to the commercial power source and the terminal of the primary side of the transformer is filled with the leaked electrolyte, the insulation resistance will deteriorate, Or, in some cases, to ignition. Insulation resistance deteriorated and heat generated, resulting in fuming of the substrate between the terminals. In some cases, there was a fear of ignition. On the other hand, in the charging apparatus of the present embodiment, even if a large amount of electrolyte is leaked, the region between the power input terminals 24a and 24b of the substrate 17 and the region between the connecting terminals 26a and 26b are removed, It is prevented that the electrolyte leaked by the provision of the openings 25 and 29 makes contact between the power input terminals 24a and 24b or between the connection terminals 26a and 26b. The insulation resistance does not deteriorate between the input terminals 24a and 24b and the connection terminals 26a and 26b and even if the operation of the charging device 10 is continued in this state, It is possible to exclude the possibility that the substrate 17 is burned and ignited. Although the above embodiment has been described as an example of the charging device having the movable type float 15, It is equally applicable to non-movable flocks. In the above embodiment, the charging device for charging the secondary 3-type secondary battery and the secondary 4-phase secondary battery at the same time is exemplified. However, any number of batteries can be charged at one time. Next, a preferred embodiment of the charging circuit according to the present invention will be described. As a charging method of a secondary battery such as an alkaline battery or a nickel cadmium battery, there is known a constant current charging method, a constant voltage charging method, a pulse charging method, or a charging method combining these methods. Among them, the pulse charging method is a method of charging the secondary battery by the constant current pulse as shown by the waveform of FIG. 11 (e), and is mainly used for reducing the burden on the battery at the time of rapid charging Or used for charge control. Before describing the pulse charging circuit used as the charging circuit of the present invention, the conventional pulse charging circuit will be described with reference to the schematic configuration of FIG. 10 and the waveform diagram of FIG. The constant current 5101 output from the charging power source 101 is a waveform as shown in Fig. 11 (a), which is input to the switch circuit 106. Fig. The pulse generating circuit 103 outputs a pulse signal 5102 as shown by the waveform of FIG. 11 (b). The charging control circuit 102 senses the charged state by the output of the temperature detecting element 107 provided in the vicinity of the secondary battery 104 or the terminal voltage of the secondary battery 104, And outputs a signal 5103 indicating the level of the ON state while being charged and the level of OFF when the completion of charging is detected as shown by the waveform of FIG. 11 (c). The AND circuit 105 takes an AND operation of both the signals 5102 and 5103 output from the pulse generator 103 and the charge control circuit 102 and outputs a signal as shown by the waveform of FIG. (5104) to the switch circuit (105). The switch circuit 106 for inputting the output current 5101 of the charging power supply 101 is turned on and off by the signal 5104 from the AND circuit 105 and is shown by the waveform of FIG. A constant current pulse 5105 as shown in Fig. This electrostatic pulse 5105 is applied to the secondary battery 104, and pulse charging is performed accordingly. As such a conventional pulse charging circuit, for example, in Japanese Patent Laid-Open Publication No. 89-81628, In order to suppress the occurrence of this phenomenon, a method of performing charging by a constant current that forms a pulse waveform with a conduction time of 0.1 to 0.5 seconds and a pause time of 0.1 to 1 second is shown. In addition, in Japanese Patent Application Laid-Open No. 90-254931, A method of controlling charging based on the difference between the battery voltage at the time of charging and the battery voltage at the time of pulse OFF is indicated. However, according to the above-described conventional pulse charging circuit, since the amount of electric power required to charge the till secondary battery to complete the charging of the secondary battery with the same charging time as the constant current charging type is the same, the maximum consumption power of the pulse charging type Which is disadvantageous in comparison with the constant current charging system. For example, if the amount of power required to fully charge the secondary battery is B and the charging time (T) is fixed, the amount of power (I) and the maximum power consumption (p.pmax) in the constant-

I = VXlxT = VIT

P77 = VXI = Vl

. Figure 12 (a) shows the time variation of the maximum power consumption (p.H) in the constant current charging mode. On the other hand, in the pulse charging method, when the duty ratio of the charging time and the stopping time at the time of pulse charging is set to 50%, the total charging time is half as compared with the constant current charging method. Therefore, by doubling the charging current, (B) and the maximum power consumption (Pr.pm ax)

I = VX (2Xl) X (2 / T) = VIT

Pr.pa ax = VX (2Xl) = 2Vl = 2Ppa ax

. Figure 12 (b) shows the time variation of the maximum power consumption (Ppm, ax) in the pulse charging system. As described above, when the duty ratio is 50%, the maximum power consumption (Pm.ax) is doubled in the pulse charging method as compared with the constant current method. According to the same consideration, when the duty ratio is (1 / d) X100%, the maximum power consumption (Pmax) of the pulse charging system is doubled in comparison with the constant current system. Also, when n secondary batteries are charged with the charging time equal to the time required for charging one secondary battery, since either of the charging methods can supply n times as much current, The number of the secondary batteries can be set to any number. In addition, the fact that the maximum power consumption is increased necessarily results in an increase in the size of each electronic component constituting the charging circuit. Therefore, the pulse charging system tends to be larger in size than the constant current system. The pulse charging circuit of the present embodiment described below enables charging of the same number of secondary batteries at the same time in the conventional art in which the maximum power consumption is increased. FIG. 6 shows the main part of the pulse charging circuit according to the present embodiment, and FIG. 7 shows waveforms of signals at respective points in FIG. In the present embodiment, it is assumed that the duty ratio of the pulse charging is set to 50% for convenience of explanation and the two systems of the charging circuits are provided. First, the secondary batteries 41 and 42 to be charged are respectively installed between charging terminals (not shown). The secondary batteries 41 and 42 may be a plurality of secondary batteries of the same number. The charging power supply 40 is a circuit that receives the supply of the commercial AC power outputted from the other two sides of the transformer 22 in the second stage and outputs the constant current 51. The constant current 51 has a waveform as shown in FIG. 7 (a), which is input to the switch circuits 43 and 44. The pulse signal 52 shown by the paragraph in FIG. 7 (b) is outputted from the pulse generating circuit 45. [ The pulse signal 52 is input to the AND circuit 47 as it is and inverted to the waveform 53 as shown in FIG. 7 (c) by the NOT circuit 48 and then inputted to the AND circuit 47 . The charging control circuit 51 monitors the state of charge by the output of the temperature detecting element 53 provided in the vicinity of the secondary battery 41 and / or the terminal voltage of the secondary battery 41, OFF control of charging. As shown by the wave form of FIG. 6 (d), a signal 54 which is at the ON level while the charging is completed and a signal 54 which becomes the OFF level when the completion of charging is detected. Likewise, the charging control circuit 52 monitors the charging state by the output of the temperature detecting element 54 provided in the vicinity of the secondary battery 42 and / or the terminal voltage of the secondary battery 42, OFF control of charging. As shown by the waveform of FIG. 6 (D), a signal 55 which is at the ON level during charging and a signal OFF at the level of OFF when charging is detected is output. In addition, temperature detection and terminal voltage detection of the secondary battery used for charging control may be used in combination. You can use either one or the other. Another widely known method may be used. However, it is preferable that the charging control circuits 51 and 52 use two methods. The AND circuit 46 takes the AND of the signals 52 and 54 respectively outputted from the pulse generating circuit 45 and the charge control circuit 51 and outputs the signal of the pseudo signal as shown in FIG. (56) to the switch circuit (43). Likewise, the AND circuit 47 performs AND of the signals 53 and 55 output from the NOT circuit 48 and the jumping control circuit 52, and outputs the signal of the waveform shown in FIG. 6 (d) (57) to the switch circuit (44). The switch circuit 43 performs a switching operation in response to the signal 56 from the AND circuit 46 with respect to the charging current 51 output from the charging power supply 40, The constant current pulse 58 is output to pulse charge the secondary battery 41. [ Likewise, the switching circuit 44 performs a switching operation on the charging current 51 output from the charging power supply 40 in accordance with the signal 57 from the AND circuit 47, and as shown in FIG. 6 (h) The secondary battery 42 is pulse-charged by outputting a constant-current pulse 59 that is low. Here, referring to the constant current pulse 58 shown in Fig. 6 (g) and the constant current flow 59 shown in Fig. 6 (h), in this embodiment, while one system is being charged, It can be seen that the system of the side is in the charging period. Fig. 8 (a) is a view showing the form of the power supply. The charging of the A series by the constant current pulse 59 and the charging of the B series by the constant current gauge 58 are alternately performed exclusively. By thus reducing the secondary battery which is actually charged at a certain time from the total number of the secondary batteries to be charged, it is possible to suppress the increase of the maximum power consumption. Comparing the figure 8 (a) with the figure 12 (b) showing the conventional pulse charging system, according to the pulse charging circuit of the present embodiment, the secondary battery of the equal number is charged It can be seen that the maximum power consumption can be halved. Therefore, according to the pulse charging circuit of the present embodiment, when the maximum power consumption is made equal to that of the conventional pulse charging circuit, the number of secondary batteries that can be charged at the same time can be doubled. In this embodiment, the two-system charging circuit is used and the duty ratio of the pulse charging is set to 50%. However, the charging circuit having n systems (n is an arbitrary integer of 2 or more) 1 / n) X100%. In this case, instead of the pulse generating circuit 45 and the NOT circuit 48 shown in FIG. 5, a control circuit for outputting control signals for n systems exclusively turning ON the respective switch circuits by a quantity corresponding to a predetermined duty ratio It is good to install. Fig. 8 (b) shows a form of power supply to each system when four types of charging circuits are provided and the duty ratio of pulse charging is 75%. In this case, the same effect as described above can be obtained. That is, according to the pulse charging circuit of the present embodiment, the maximum power consumption can be suppressed to 1 / n when the secondary battery of the water flow is charged in the same time period as the conventional pulse charging circuit. In addition, when the maximum power consumption is made equal to that of the conventional pulse charging circuit, the number of secondary batteries that can be charged at the same time can be increased to n times. The same effect can be obtained even if the duty ratio of pulse charge per system is smaller than (1 / n) x100%. As described above, according to the embodiment of the present invention, it is possible to charge the same number of secondary batteries at the same time as the conventional one without increasing the maximum power consumption, and further, the size of the main body of the charging apparatus can be avoided. In addition, since the same number of secondary batteries can be charged in the same time as the conventional one without increasing the maximum power consumption, the secondary battery can be charged at the same time when the maximum power consumption is made equal to that of the conventional pulse charging circuit You can increase the number of frames. FIG. 9 shows a main configuration of a pulse charging circuit according to another embodiment of the present invention. This embodiment uses the T-type flip-flop 49 instead of the N7T circuit 48 in FIG. The signal waveform diagram at each point in FIG. 9 will be referred to FIG. 10. First, a secondary battery to be charged is installed between charging terminals not shown. The constant current 51 outputted from the charging power source 1 has a wave length as shown in Fig. 6 (a), which is input to the switch circuits 43 and 44. [ A pulse signal 52 as shown in Fig. 7 (c) is outputted from the pulse generating circuit 45. [ The pulse signal 52 is input to the T-type flip-flop 49. The T flip flop 49 outputs a signal 512 as indicated by the waveform of the sixth (o) diagram from the non-inverting output terminal 7 and supplies it to the AND circuit 46 and from the inverting output terminal P And outputs a signal 53 shown by the waveform of FIG. 6 (b) to the AND circuit 47. The charging control circuit 51 monitors the state of charge by the output of the temperature detecting element 53 provided in the vicinity of the secondary battery 41 and / or the terminal voltage of the secondary battery 41, OFF control of charging. As shown by the waveform in FIG. 6 (d), the signal 54 is turned ON when charging is completed, and when the completion of charging is detected, the signal 54 is turned OFF. Likewise, the charging control circuit 52 monitors the state of charge by the output of the temperature detecting element 54 provided in the vicinity of the secondary battery 42 and / or the terminal voltage of the secondary battery 42, OFF control of charging. As shown by the waveform of FIG. 6 (d), when the completion of charging of the ON level is detected during charging, a signal 55 which becomes the OFF level is outputted. The temperature detection and the terminal voltage detection of the secondary battery used for charge control may be performed in combination, or either one of them may be used. Another widely known method may be used. However, it is preferable that any method is used in two lines of the filler circuit 51 (52). The AND circuit 46 takes the AND of the signals 52 and 54 output from the gull generating circuit 45 and the charge control circuit 51 and outputs a signal having a wave length as shown in FIG. 56 to the switch circuit 43. The AND circuit 47 takes the AND of the signals 53 and 55 respectively outputted from the NOT circuit 47 and the charge control circuit 52 and outputs the AND of the waveforms shown in FIG. And gives the signal 57 to the switch circuit 44. [ According to the present embodiment, it can be seen that the maximum power consumption can be halved when two batteries of equal number are charged at the same time in comparison with the conventional pulse charging circuit as in the embodiment of FIG. 5. Therefore, according to the pulse charging circuit of the present embodiment, when the maximum power consumption is made equal to that of the conventional pulse charging circuit, the number of secondary batteries that can be charged at the same time can be doubled. It is also possible to have the n-system (where n is an arbitrary integer of 2 or more) charging circuits and to set the duty ratio of pulse charging per system to (1 / n) xloo% or less as in the embodiment of FIG. 5 The same effect as that of the first embodiment can be obtained. As described above, according to the present embodiment, it is possible to charge the same number of secondary batteries at the same time as in the prior art without increasing the maximum power consumption, and further, the size of the main body of the charging apparatus can be avoided. In addition, since the same number of secondary batteries can be charged at the same time without increasing the maximum power consumption, the number of secondary batteries that can be charged at the same time when the maximum power consumption is equal to that of the conventional pulse charging circuit . In the above-described embodiment, the constant current pulse is used for convenience in comparison with the constant current charging. However, the present invention is not limited to this, and the present invention is also applicable to the case of charging using current pulses other than the constant current pulses . The present invention is not limited to the above-described embodiments, and various modifications may be made without departing from the scope of the present invention. According to the present invention, in the substrate in the main body of the charging apparatus, the area between the power input terminals connected to the commercial power source, and furthermore, the area between the wiring from the power input terminal and the plurality of connection terminals for connecting the wiring from the charging circuit The electrolytic solution leaks from the primary battery charged by a mistake or the like, and when the electrolytic solution leaks into the charging device, the electrolytic solution does not communicate between the terminals, Can be excluded. Further, according to the present invention, since only the opening portion is provided on the substrate, it is possible to prevent fuming and ignition at a very low cost without requiring a special circuit. According to the present invention, since a plurality of pulse charging means for pulse-charging the secondary battery are provided and the timing of the ON state of the pulse charging waveform outputted from the pulse charging means of each system is not overlapped with each other, the maximum power consumption is increased It is possible to charge the same number of secondary batteries at the same time as in the prior art. As a result, it becomes possible to avoid enlargement of the charging device.

Claims (6)

A board on which a charging circuit for charging a secondary battery is received by receiving power from a commercial power supply and a plurality of power input terminals are mounted on the commercial power supply and a battery accommodating portion for accommodating the secondary battery are installed in the same copier body In the charging device. And an opening in an area is provided between the plurality of power input terminals of the substrate. A charging circuit for charging a secondary battery by receiving power from a commercial power source is mounted and a plurality of power input terminals connected to the commercial power source and a plurality of power input terminals for connecting wirings from a plurality of power input terminals and wirings from the charging circuit A charging apparatus provided with a plurality of connection terminals on a board and a battery accommodating section for accommodating the secondary battery in the same photocoupler, characterized in that a region between the plurality of power input terminals of the board, Characterized in that an opening is provided in a region between the terminals The charging circuit according to claim 1 or 2, wherein the charging circuit comprises: a charging power supply for receiving a power supply from the commercial power supply and outputting a constant current; and a controller for inputting a constant current from the charging power supply to pulse-charge the secondary battery And a control means for controlling the pulse charging means so that the timings of the ON states of the pulse charging waveforms outputted by the plurality of pulse charging means do not overlap each other, The charging apparatus according to claim 3, wherein the plurality of pulse charging means simultaneously charge two or more two-phase batteries of the same number. 4. The charging apparatus according to claim 3, wherein the control cigarette exclusively selects the pulse charging means in which the pulse charging waveform becomes the ON state. 4. The apparatus according to claim 3, wherein the plurality of pulse charging means comprises full charge detecting means for detecting full charge of the secondary battery, and means for invalidating the control of the control means when full charge is detected by the charge detecting means And means for completing the charging operation. ※ Note: It is disclosed by the contents of the first application.