CN2175488Y - Arrangement for charging Ni-Cd cell - Google Patents
Arrangement for charging Ni-Cd cell Download PDFInfo
- Publication number
- CN2175488Y CN2175488Y CN 93215957 CN93215957U CN2175488Y CN 2175488 Y CN2175488 Y CN 2175488Y CN 93215957 CN93215957 CN 93215957 CN 93215957 U CN93215957 U CN 93215957U CN 2175488 Y CN2175488 Y CN 2175488Y
- Authority
- CN
- China
- Prior art keywords
- circuit
- control
- battery
- panel
- rechargeable battery
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model relates to a charger for a Ni-Cd cell, which is characterized in that the utility model can charge and discharge for a secondary battery by the sampling, the comparison, the control, the constant current output of a control circuit in a casing, and the charge and the discharge processes can be displayed on a panel. The utility model has the advantages of simple structure, small size, more convenient carryover and convenient use. The utility model also has the advantages that the memory point can be effectively eliminated, the service life of the battery can be lengthened, and the charging effect is good. Thus, the utility model is an optimal charger at present and is particularly suitable for the Ni-Cd cell of a video camera.
Description
This practicality newly relates to Ni-Cd battery charger, especially the employed a kind of Ni-Cd battery charger of video camera.
Present employed nickel-cadmium cell, its voltage descends with the consumption of energy.When voltage drops to certain value, need charging again, and repeatedly on charger, charge, battery produces memory effect in this value (voltage of video camera rechargeable battery is at 11 volts) easily.The generation of this memory effect has had a strong impact on the useful life of battery and the battery service time after each charging, even can cause scrapping of battery.
The purpose of this utility model be to overcome the deficiency of prior art and provide a kind of simple in structure, can eliminate memory effect and charging is satisfactory, prolong the battery Ni-Cd battery charger in useful life.
The purpose of this utility model realizes by following measure:
Constitute by housing, the control device, demonstration, the interface that are installed in control circuit, panel and panel surface in the housing, the interface grafting rechargeable battery interface of panel surface, sampling, comparison, control, constant current output through the housing inner control circuit, rechargeable battery is discharged and recharged, and show charge and discharge process in the display unit of panel surface.
Advantage of the present utility model and good effect are:
1, that the electronic component that relates to is arranged is compact, circuit is simple, and therefore also compact of whole device is easy to carry;
2, the controlling of sampling circuit can be analyzed comparison to rechargeable battery, determines which kind of operating state this battery is in, and makes it to discharge and recharge targetedly, eliminates memory point effectively, makes battery charge satisfactory;
3, clock circuit was regulated the state of a control time of carrying out, and especially when charging, the charging in 25 seconds of every interval has 5 seconds interval, is beneficial to the chemical reaction of battery, can fully improve battery capacity and useful life; In addition, also can control the charging interval, when charging surpassed 12 hours, circuit automatically shut down;
4, be charged as constant current charge, battery is not had damage;
5, has quick-charge function;
6, can carry out independent or the multichannel charging;
Various operating states when 7, discharging and recharging show with display that all the user is directly perceived, convenient.
Description of drawings:
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is a block diagram of the present utility model;
Fig. 3 is a panel schematic diagram of the present utility model;
Below in conjunction with accompanying drawing the utility model is implemented further to describe in detail:
That the utility model power circuit A selects for use is commercially available 20-25V, the DC power supply of 5A.
The total power switch 2(K that the break-make of being used for 220 power supplys are arranged on the panel 3
1), also be equipped with charging display 4(D on the panel
7), discharge display 5(D
6), battery interface D
6(B), fill button 7(K soon
2) and fill display 8(D soon
5).What present embodiment was selected for use is 4 tunnel chargings.Control circuit places in the housing 1.
Control circuit is by 220V power supply power supply, supply power circuit A at first, by A to other circuit supply.
Reference power circuit is by integrated package 7815, filter capacitor C
1, C
2, resistance R
1, voltage-stabiliser tube D
8Constitute.Filtering capacitor C
1, C
2In parallel with integrated package 7815, provide the working power of 15V, with it Chuan Lian resistance R
1With voltage-stabiliser tube D
8For providing, comparator LM339 gives the accent power supply.
The controlling of sampling circuit is by comparator LM339, divider resistance R
2, R
3, adjustable divider resistance w
1, w
2, w
3, sampling divider resistance R
4, R
5, lift resistance R
6, R
7, R
8, R
9, postpone capacitor C
3, C
4, trigger 4044, with door 4073, reverser Q
1, Q
2, resistance R
14, and D
1(Vmos40BT) constitute.Voltage-stabiliser tube D
5Provide 10V voltage to w
1, w
2, w
3And R
2, R
3, 5,6,10,8 pin that are respectively comparator LM339 provide the reference voltage of 7.5V, 5V, 6V, 1.8V.Rechargeable battery interface 6(B) feedback voltage is through divider resistance R
4, R
5After the dividing potential drop, to LM339 4,7,, 11 pin provide sampled voltage.Sampled voltage through and reference voltage relatively, 14,2,1,13 pin by LM339 send control signal to trigger 4044.Very faint because of this signal, be provided with and lift resistance R
6, R
7, R
8Strengthen each output signal, this lifts resistance and is powered by the 15V power supply.14 pin of LM339 are connected to a delay capacitor C
3, its effect is that time-delay resetted all control chips in 0.5 second; 13 pin of LM339 are connected to another delay capacitor C
4, its effect is to eliminate virtual potential, and delays time 2 seconds, utilizes reverser Q
1By controlling D with door 4073
1
The feedback voltage of rechargeable battery is through resistance R
4, R
5After the dividing potential drop, arrive LM339, divide the comparison of sampling of 4 kinds of situations:
1, sampled voltage through with reference voltage relatively less than 1.8V, battery might be connect instead, do not connect, battery short circuit, at this moment circuit does not carry out various work to battery.
When 2, sampled voltage warp and reference voltage relatively were between the 1.8V-5V, battery had not had electricity, can directly send control signal, implemented charging.
3, sampled voltage through and reference voltage when relatively being between the 5V-6V, illustrate that battery capacity is approaching to use up, should at first eliminate memory point, at this moment reverser Q
1Turn-off D
1, D
2Connect, implement discharge, eliminate memory point.After eliminating memory point, when sampled voltage is between the 1.8V-5V, charge again.
When 4, sampled voltage warp and reference voltage relatively are between the 6V-7.3V, illustrate that battery remaining power is more, can directly carry out boost charge, up to arriving ceiling voltage 7.3V.
Clock circuit is via clock integrated package 555, resistance R
11, R
12, R
10, capacitor C
5, reverser Q
3, Q
4, counter 4040 constitutes, and the ginseng control signal is carried out time control.Integrated package 555 and resistance R
11, R
12, R
10, C
5The element circuit that forms can obtain 25 seconds cycles, the time wide 20 seconds square wave.R
11, R
12Be duty ratio resistance.Counter 4040 was counted for the time of control circuit, especially when the charging interval surpasses 12 hours, the signal breaking circuit took place.
Constant current output circuit is by D
3(Vmos9630), diode D
4, current-limiting resistance R
20With FEEDBACK CONTROL optocoupler 4n25, resistance R
19, adjustable resistance w
4, w
5Constitute.w
5, R
19Be current-limiting resistance R
2Obtain control voltage on 0.The pause control utmost point of N25 of output current adjustment, the effect of its 4N25 is to be used for adjusting D
3The output potential of operating current, to reach the purpose of constant current.Diode D
4To D
3Implement protection.
Eliminate memory circuit D
2(2RF500), R
20, R
18Constitute R
18, R
20Be current-limiting resistance.
Operation principle of the present utility model is: at interface 6(B) connect the rechargeable battery interface after, connect master switch 2(K
1), the feedback voltage of this battery is through divider resistance R
4, R
5Arrive comparator LM339.By analysis relatively after, if sampled voltage less than 1.8V, then circuit is failure to actuate, display does not work.Should check whether battery connects anti-this moment, short circuit, situation such as not connect; If when sampled voltage was between 1.8V-5V and the 6V-7.3V, explanation should directly be charged, this moment, comparator LM339 sent signal, reverser Q
1Open D
1, D
3Connect simultaneously, constant current output circuit charges to rechargeable battery.With resistance R
15The display 4(D of series connection
7) bright.During charging, under clock circuit control, rechargeable battery is implemented every charging intermittently charging control in 5 seconds in 25 seconds.Be beneficial to the effect of battery charge.If sampled voltage is between the 5V-6V, reverser Q then
1Turn-off D
1, constant current output circuit is not exported, and rechargeable battery is at first through D
2Discharge is with resistance R
17The discharge of series connection shows 105(D
6) bright, after discharge finishes, turn-off D
2, while Q
1Open D
1, D
3Connect, implement charging again.
The utility model also has quick-charge function.Promptly fill button 7(K soon when connecting
2) time, because of parallel resistor R
21With R
20-Resistance descend, output current is increased, realize filling soon function.Fill display 8(D this moment soon
5) bright.
Claims (3)
1, a kind of Ni-Cd battery charger, it is characterized in that: constitute by housing, the control device, display unit, the interface that are installed in control circuit, panel and panel surface in the housing, the interface grafting rechargeable battery interface of panel, the sampling of the control circuit in housing, comparison, control constant current output, rechargeable battery is discharged and recharged, and show charge and discharge process in the display unit of panel surface.
2, Ni-Cd battery charger according to claim 1, it is characterized in that: the control circuit of described shell is made of power circuit, reference power circuit, clock circuit, controlling of sampling circuit, constant current output circuit, elimination memory circuit, the controlling of sampling circuit receives the feedback voltage of rechargeable battery, through with the comparison of reference voltage, send control signal, this signal at constant current output circuit, is implemented charging to rechargeable battery by the time control of clock.Eliminate memory circuit rechargeable battery is implemented discharge, the display unit of panel shows charge and discharge process.
3, Ni-Cd battery charger according to claim 1 and 2 is characterized in that: the control device of panel is for filling button, mains switch soon; Display unit is the charging display, the discharge display, fills display soon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93215957 CN2175488Y (en) | 1993-06-12 | 1993-06-12 | Arrangement for charging Ni-Cd cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93215957 CN2175488Y (en) | 1993-06-12 | 1993-06-12 | Arrangement for charging Ni-Cd cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2175488Y true CN2175488Y (en) | 1994-08-24 |
Family
ID=33796283
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93215957 Expired - Fee Related CN2175488Y (en) | 1993-06-12 | 1993-06-12 | Arrangement for charging Ni-Cd cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2175488Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102723747A (en) * | 2011-03-30 | 2012-10-10 | 海洋王照明科技股份有限公司 | A battery charging circuit and an illuminating lamp |
-
1993
- 1993-06-12 CN CN 93215957 patent/CN2175488Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102723747A (en) * | 2011-03-30 | 2012-10-10 | 海洋王照明科技股份有限公司 | A battery charging circuit and an illuminating lamp |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |