TW587359B - Multi-functional lead secondary battery charger - Google Patents

Abstract

The present invention relates to a multi-functional lead secondary battery charger, and especially to a lead secondary battery charger having intelligent recognition function. According to the present invention, the multi-functional lead secondary battery charger is formed of a power source to control the voltage and current, and a controller built-in with various charging characteristic curves. The controller is used to pre-detect the voltage of charged battery (or discharging capacity) before charging, so as to determine whether the battery is over-charged or not. When the battery is over-charged, the small current/fixed current repairing charge mode is applied to proceed repairing charge until the battery returns to the normal operation state, and then the general charging mode or equalization charging mode is employed. Also, the equalization charging mode is started by applying the general charging for a predetermined number of times, triggering from the battery system, initiating from the charger itself, or triggering manually, so as to perform equalization charging to the battery.

Description

587359

[Technical field to which the invention belongs] The present invention relates to a multifunctional lead-acid battery charger, and more particularly to an owner of a lead-acid battery charger having an intelligent identification function. [Previous technology] The charging mode of conventional battery chargers can only charge batteries within a limited range of conditions, and cannot save electricity that is already in an over-discharge state. As a result, once the battery is over-discharged, it can only be discarded and wasteful maintenance A battery that can still be used. w Most of the wrong battery packs sold in the market are composed of multiple single rounds. Because each single round has some slight differences, if the normal charging mode is used, the battery pack cannot be equalized, and each The difference between single rounds is gradually increased due to the cumulative number of charges, which eventually makes the battery charge and discharge function more likely to decay, and shortens the battery's cycle life. [Content] If the present invention belongs to a multifunctional lead-acid battery charger, it particularly has over-voltage protection function, and provides more than two charging modes, including two general charging modes and over-discharge charging modes. For example, the present invention belongs to a multifunctional lead-acid battery charger, which has an equalized charging function 'to provide more than two types of charging modes, including a charging mode and an equalizing charging mode. For example, the present invention belongs to a multifunctional lead-acid battery charger, which has an over-discharge repair function and an equalized charging function to provide two charging modes, including a general charging mode, an over-discharge charging mode, and an equalized charging mode.

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formula. [Embodiment] Please refer to the first diagram of the conventional general charging mode curve, which is composed of a charging current voltage of 10 and a charging time of 11. The charging mode of a general lead-acid battery is a constant (limit) current constant voltage (CICV), or Constant (limit) current constant voltage constant voltage (CICVCV) charging method. The first period of charge To-l of this charging mode is to charge the battery at a constant current of 15 at a constant current of 12, and when the voltage reaches a set voltage (to avoid generating a large amount of gas, the gasification voltage is generally not exceeded 16) , It will be changed to charge the second time period Ti-T2 constant voltage charge 13, and the charge ends after full charge, or the third time period of charging τ2_τ3 is triggered in different ways (timing or charging current 17 drops, etc.) to trigger charging The device turns from ^-^ to TfL constant voltage floating charge 14 state. The disadvantage is that it is impossible to perform over-discharge repair and charge for two groups of batteries and equalized charge between individual rounds. Please refer to the second, third, and fourth diagrams at the same time, all of which are equalized charging curves. Most lead-acid battery packs were originally composed of multiple single rounds, and the single single rounds of the mother were slightly different, so When the battery reaches 23 stages of constant voltage charging in the general charging mode (refer to the comparison of the first figure and the & second figure), although the total voltage is equal to the set upper limit voltage, each single round voltage is not the same, It will cause some single rounds to fail to be fully charged; in this way, the difference between each single round will gradually increase the difference due to the cumulative number of charge and discharge uses, which will cause the battery charge and discharge function to rapidly decay and shorten the battery cycle life. However, this problem must be solved by the equalization charging mode, and the method of equalization charging is to charge the battery with a charging voltage lower than the vaporization voltage 26, and then equalize the charging with a constant current 24. Although this stage Limit voltage is higher than gasification power

Page 6 587359 Voltage 2 8 'But each single round of the series can be fully charged, and the charging voltage of equalized charging is high, but because the current is very small and the time is short, its good impact on the battery can be reduced. To the minimum level; and whether the completion of equalization charging is possible; the timing method or the maximum value of the highest rising voltage can be used as a judgment; therefore, when waiting = the charging is completed or the charging can be terminated (see the second figure), Or it can be switched to constant voltage floating charge 29 (see the third and fourth figures). In this way, with the provision of the present invention, in addition to the lead battery charger having a general charging mode, it will have an equalized charging mode at the same time, and can be started at an appropriate timing (with time, general charge accumulation times, manual trigger) and other equalized charging Mode to equalize and charge the battery, and improve the battery charge and discharge performance, @ to extend the battery's cycle life. Refer to the fifth, sixth, and seventh diagrams at the time of the month, all of which are maintenance and charging curves. Depending on the characteristics of the lead-acid battery, it will vary with the depth of discharge. Especially its voltage and internal resistance. ㈣ Over-discharge causes great changes. Older fast-charge chargers only charge normal-use batteries. If the lead-acid battery discharged at the voltage of the general constant-voltage charging mode is charged, it is difficult to sink current into the battery in the initial period because the internal resistance of the lead-acid battery is excessive, and the initial high internal resistance is overcome due to the rapid decrease in internal resistance. Electricity & overload the charger and battery, cause damage to the charger or battery, and even damage it and make it unusable. Using the general fast charge constant current charging mode, it is easy to cause battery fluid, vaporization or outside due to high internal charge = the amount of ‘to make the battery temperature too high’: injury to the battery. For over-discharged lead-acid batteries, it is suitable to use a small j to repair and charge 32, and the battery's electrical resistance and internal resistance value return to normal work = (see Figure 5 'before comparing the connection between Figure 6 and Figure 7) Time course u 587359 case number 90125468 mmmmmmr ----

5. Description of the invention (4) That is clear). Please refer to Figure 8 and Figure 9 at the same time, which are the multifunctional lead storage of the present invention. The block diagram and circuit diagram of the battery charger are composed of a power source 51 that can control voltage and current and a controller 5 2 with various charging curves built-in. The multifunctional lead-acid battery charger 50 is formed, which can cooperate with the power supply 51 circuit area, the current signal line 58 area and the controller 52 circuit area with reference to the ninth figure to form a circuit diagram according to the present invention. The controller 5 2 is used in Before charging, the voltage (or discharge capacity) of the battery 5 3 is detected in advance to determine whether the battery 5 3 is over-discharged. If the battery 53 is over-discharged, use a small current and constant current to repair the charging mode, and the battery 53 Carry out maintenance and charging until the battery 53 returns to the normal working state, and then switch to the normal charging mode or the equalized charging mode; In addition, the activation of the equalized charging mode is based on the accumulation of general charging times reached the predetermined number, or by the battery 53 system Triggered either by the charger 50 itself or by manual triggering to equalize the battery 53. As described above, when the charger is connected to the battery, the battery is judged whether it is over-discharged before charging (based on the battery voltage or discharge capacity). If the battery is over-discharged, first use a different charging mode Small current and constant current repair and charge mode, repair and charge the battery until the battery is fully charged, or after the battery overcomes the initial high internal resistance value and returns to normal working state (you can use the repair charge time and / or) The charging voltage is judged) and then the state is changed to charge the battery in a normal charging mode or an equalized charging mode. As described above, the present invention is characterized by having any two of the following three charging modes, or a multifunctional lead-acid battery charger with three types of charging simultaneously: a general charging mode; an equalizing charging mode; and

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587359 _Case No. 90125468 丨: Π year;! Month 丨 day correction _; _______________________ Brief description of the drawing — [Illustration of the drawing] The first picture is a curve diagram of the general charging mode. The second graph is one of the equalization charge curve graphs (equalization-cutoff). The third figure is the second equalization charge curve (equalization-floating charge). The fourth graph is the third of the equalization charging curve (equalization-intermittent-floating charge). The fifth picture is one of the maintenance charging curve diagrams. The sixth figure is the second curve of maintenance charge (repair-general). The seventh picture is the third of the maintenance charge curve (repair-equalization).

The eighth figure is a block diagram of the multifunctional lead-acid battery charger of the present invention. The ninth figure is a circuit diagram of the multifunctional lead-acid battery charger of the present invention. [Illustration of drawing number] 10--charging current voltage 11--charging time Το-η--charging first period η-Α--charging second period T2 charging third period 1 2--constant current fast charging 1 3- -Constant voltage charging 14-Constant voltage floating charging 15-Constant current 16-Charging voltage <gasification voltage 17_-Charging current 20-Charging current voltage 21-Charging time

To-Ti--charging for the first period, charging for the second period, T2-T3--charging for the third period, T3-T4--charging for the fourth period, T4 ----- charging for the fifth period, 22--constant current fast charge, 23--constant voltage Charging 24-constant current equalization charging 25-intermittent 26-charging voltage <gasification voltage 27-charging current 28-limit voltage> gasification voltage 29-constant voltage floating charging 30-charging current voltage 31- Charging time

Page 10 587359 _Case No. 90125468 Amendment _ Simple illustration

To-Ti--charging first period Ti-L--charging second period T2-T3--charging third period T3-T4--charging fourth period T4-T5--charging fifth period T5--charging Six periods 32—small constant current maintenance and charging 33—charging voltage

34--small current repair charge 35--constant current fast charge 36 --- constant voltage charge 37--constant voltage floating charge 38--constant current equalization charge 39--intermittent 40--repair charge 4 Current 50-charger 5-power supply 52-controller 53-battery 54-switch 55-communication line 56-control signal line 57-voltage signal line 58-current signal line 5 9-ground

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Claims (1)

587Y1 · A "multifunctional lead-acid battery charger", according to the present invention, a multifunctional lead-acid battery charger is mainly composed of a power source that can control voltage and current and a controller with various charging curves built-in, of which: The device detects the voltage (or discharge capacity) of the charged battery in advance to determine whether the battery is over-discharged. If the battery is over-discharged, a small current is used to quantitatively repair the charging mode, and the battery is repaired and charged to After the battery returns to normal working state, it will switch to the normal charging mode or equalized charging mode. In addition, the start of the equalized charging mode is based on the accumulated number of general charging times, or triggered by the battery system or initiated by the charger. , Or by manual trigger to equalize the battery charge, and is its characteristic. 2 · A "multifunctional lead-acid battery charger" as described in the first item of the scope of patent application, where the equalization charging method is to charge the battery with a charging voltage lower than the vaporization voltage, and then equalize the charging with a constant current. Although the limit voltage after this stage is higher than the gasification voltage, each single round of the series can be fully charged, and the charging voltage of equalization charging is high, but because the current is small and the time is short, its The adverse effect of the battery should be minimized; and the completion of equalized charging can be judged in a timed manner or based on the maximum value of the highest rising voltage; therefore, after the equalized charging is completed, the charging can be terminated, or Can be switched to constant voltage floating charge. 3. A "multifunctional lead-acid battery charger" as described in the first item of the scope of patent application, where the charger is connected to the battery, and the battery is over-discharged before charging (based on the battery voltage or discharge capacity) ), If the battery is over-discharged, first use a small current setting different from the normal charging mode. 587359 Case No. 9012546 $ _ Amendment VI. Patent application scope Current repair charging mode 'repair and charge the battery until the battery is fully charged, or after the battery overcomes the initial high internal resistance value and returns to normal working condition (you can Judging by the repair charging time and / or the charging voltage), then the state is changed to charge the battery in a normal charging mode or an equalized charging mode. 4. A "multifunctional lead-acid battery charger" as described in the first item of the patent application scope, wherein the present invention has any two of the following three charging modes, or also has three kinds of multifunctional lead-acid battery chargers, including: General charging mode; equalized charging mode; and over-discharge repair charging mode. Page 13