CN209184281U - A kind of charger preventing overcharge - Google Patents
A kind of charger preventing overcharge Download PDFInfo
- Publication number
- CN209184281U CN209184281U CN201822152434.XU CN201822152434U CN209184281U CN 209184281 U CN209184281 U CN 209184281U CN 201822152434 U CN201822152434 U CN 201822152434U CN 209184281 U CN209184281 U CN 209184281U
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- charger
- circuit
- control circuit
- charging
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Abstract
The utility model discloses the chargers that one kind can prevent overcharge, the charger body includes output end, the output end is connected with battery, the charger body further includes control circuit, Acquisition Circuit and power-down circuit, the Acquisition Circuit is connected with the output end of charger, for acquiring the charging voltage signal of charger output and the size of charging current signal, the Acquisition Circuit is connected with control circuit, for collected signal to be sent to control circuit, the control circuit is used to carry out calculation process to the signal that acquisition comes, judge just rising in value Δ I whether constant voltage charging phase charging current occurs.The utility model so that battery in constant voltage charging phase, increases electric current and just rising in value Δ I control, can effectively prevent battery overcharge by the design of Acquisition Circuit, control circuit and power-down circuit.
Description
Technical field
The utility model relates to charger technologies field, especially a kind of charger that can prevent overcharge.
Background technique
Zinc-nickel cell charging generally turns constant voltage mode charging using constant current, is gradually reduced in constant voltage charging phase electric current, directly
Stop charging to after dropping to cut-off current, but with the increase of battery, inside battery electrolyte will appear reallocation
And consumption, the internal resistance of cell will increase, charging polarization is reinforced, and charge efficiency reduces, and the gas that anode generates will increase, due to electro-hydraulic
Reallocation and reduction, gas reach cathode compounding machine will increase, charging the temperature rise of later period battery it is obvious, cause battery in constant pressure
In charging process, due to battery temperature rise, voltage is reduced, and charging current increases, and electric current can not continue the control for being reduced to cut-off current
It is processed, it will cause battery overcharge, thermal runaway occur.The utility model passes through Acquisition Circuit, control circuit and power-down circuit
Design can effectively prevent battery overcharge so that battery in constant voltage charging phase, increases electric current and just rising in value Δ I control.
Utility model content
In view of the deficiencies of the prior art, the utility model provides a kind of charger that can prevent overcharge, passes through acquisition
The design of circuit, control circuit and power-down circuit, so that battery in constant voltage charging phase, increases electric current and is just rising in value Δ I control,
It can effectively prevent battery overcharge.
The utility model solves its technical problem and adopts the following technical solutions to achieve:
A kind of charger preventing overcharge, including charger body, the charger body includes output end, described
Output end is connected with battery, and the charger body further includes control circuit, Acquisition Circuit and power-down circuit, the Acquisition Circuit
It is connected with the output end of charger, for acquiring the charging voltage signal of charger output and the size of charging current signal, institute
Acquisition Circuit is stated to be connected with control circuit, for collected signal to be sent to control circuit, the control circuit for pair
It acquires the signal that comes and carries out calculation process, judge just rising in value Δ I whether constant voltage charging phase charging current occurs, the control
Circuit processed includes timing circuit and comparison circuit, for determining the situation of change of the charging current within certain a period of time, the control
Circuit processed is connected with power-down circuit, and the power-down circuit other end is connected with the output end of charger, for when in constant-voltage charge
Stage occur charging current just rising in value Δ I when, the control circuit can control power-down circuit execute power operation, make charger sheet
Body stops powering to output end.
Preferably, the charger body further includes voice warning circuit, the voice warning circuit and control circuit phase
Even, for carrying out voice prompting after charging complete.
Preferably, the charger body further includes input terminal, and the input terminal is connected with control circuit, is used for electric energy
It is sent to control circuit.
Preferably, the other end of the input terminal is connected with external power supply.
Preferably, the control circuit includes control chip, and the control chip can carry out charging electricity by internal processes
The setting of the positive increment Δ I of stream.
Preferably, the power-down circuit includes cut-off switch.
Compared with prior art, the utility model embodiment bring it is following the utility model has the advantages that
The output end of charger body is connected with external cell, and input terminal is connected with external power supply, for passing through external electricity
Source charges the battery；Charger body includes control circuit, Acquisition Circuit and power-down circuit, Acquisition Circuit and charger
Output end is connected, and for acquiring the charging voltage signal of charger output and the size of charging current signal, control circuit is used for
Calculation process is carried out to the signal that comes of acquisition, judges just rising in value Δ I whether constant voltage charging phase charging current occurs, when
Constant voltage charging phase occur charging current just rising in value Δ I when, control circuit can control power-down circuit execute power operation, make to charge
Device ontology stops powering to output end；The utility model passes through the design of Acquisition Circuit, control circuit and power-down circuit, so that electric
Pond increases electric current and is just rising in value Δ I control, can effectively prevent battery overcharge in constant voltage charging phase.
Detailed description of the invention
Fig. 1 is the circuit connection block diagram that the utility model one kind can prevent charger body in the charger of overcharge；
Fig. 2 is that the utility model one kind can prevent charger body in the charger of overcharge to be connected with battery and power supply
Circuit connection block diagram；
Fig. 3 is that the utility model one kind can prevent battery normal constant-current in the charger of overcharge from turning constant-voltage charge curve
Figure；
Fig. 4 is that the utility model one kind can prevent from the charger of overcharge battery constant current to turn constant-voltage charge cut-off current not having
Onset time ends overcharge curve graph；
Fig. 5 is that the utility model one kind can prevent from the charger of overcharge battery constant current to turn constant-voltage charge cut-off current not having
Onset time cut-off overcharge causes thermal runaway curve graph；
Fig. 6 is that the utility model one kind can prevent from just rising in value in the charger of overcharge the setting of Δ I.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
Please refer to Fig. 1-6, a kind of embodiment provided by the utility model: one kind can prevent the charger of overcharge, including
Charger body, the charger body include output end, and the output end is connected with battery, and the charger body further includes
Control circuit, Acquisition Circuit and power-down circuit, the Acquisition Circuit is connected with the output end of charger, defeated for acquiring charger
The size of charging voltage signal and charging current signal out, the Acquisition Circuit are connected with control circuit, for that will collect
Signal be sent to control circuit, the control circuit is used to carry out calculation process to the signal that acquisition comes, and judges in constant pressure
Whether the charging stage, which charging current occurs, is just rising in value Δ I, and the control circuit includes timing circuit and comparison circuit, for determining
The situation of change of charging current within certain a period of time, wherein timing circuit is used for timing, and comparison circuit is for starting timing
After preceding and timing stops, the size of the charging current value at the two moment is compared, if timing start before charging current
The charging current value being worth after stopping than timing is small, then for explanation in the timing time section, positive increment Δ is had occurred in charging current value
I, the control circuit are connected with power-down circuit, and the power-down circuit other end is connected with the output end of charger, for working as
Constant voltage charging phase occur charging current just rising in value Δ I when, the control circuit can control power-down circuit execute power operation, make
Charger body stops powering to output end；The charger body further includes input terminal, the input terminal and control circuit phase
Even, for electric energy to be sent to control circuit, the other end of the input terminal is connected with external power supply.
The control circuit includes control chip, and the control chip can carry out charging current by internal processes and just rise in value
The setting of Δ I, electric current are just rising in value Δ I setting, and may be configured as constant-current charge value according to the difference of battery capacity and structure 1% arrives
5%, the power-down circuit includes cut-off switch, and the control chip in control circuit can control cut-off switch and be switched on or off,
To the electrical communication of the output end of on or off control circuit and charger body；Charger body is carrying out constant current to battery
During turning constant-voltage charge, increase the monitoring to electric current in constant voltage charging phase, when electric current occurs increasing phenomenon, charger sheet
It is reference point that the Acquisition Circuit of body, which will acquire electric current minimum point, stops charging when electric current rises to certain value, and protection battery is kept away
Exempt to overcharge and thermal runaway occurs；Charger body further includes voice warning circuit, and the voice warning circuit is connected with control circuit,
For carrying out voice prompting after charging complete；When constant voltage charging phase occur charging current just rising in value Δ I when, illustrate to have filled
Electricity is completed, at this point, on the one hand control power-down circuit executes power operation to control circuit, on the other hand, controls voice warning circuit
Issue the voice prompting of " charging complete ".
Working principle: the output end of charger body is connected with external cell, and input terminal is connected with external power supply, for leading to
External power supply is crossed to charge the battery；Charger body includes control circuit, Acquisition Circuit and power-down circuit, Acquisition Circuit with
The output end of charger is connected, for acquiring the charging voltage signal of charger output and the size of charging current signal, control
Circuit is used to carry out calculation process to the signal that acquisition comes, and judges just rising in value whether constant voltage charging phase charging current occurs
Δ I, when constant voltage charging phase occur charging current just rising in value Δ I when, control circuit can control power-down circuit execute power-off behaviour
Make, charger body is made to stop powering to output end；
Zinc-nickel cell charging generally turns constant voltage mode charging using constant current, is gradually reduced in constant voltage charging phase electric current, directly
Stop charging to after dropping to cut-off current, but with the increase of battery, inside battery electrolyte will appear reallocation
And consumption, the internal resistance of cell will increase, charging polarization is reinforced, and charge efficiency reduces, and the gas that anode generates will increase, due to electro-hydraulic
Reallocation and reduction, gas reach cathode compounding machine will increase, charging the temperature rise of later period battery it is obvious, cause battery in constant pressure
In charging process, due to battery temperature rise, voltage is reduced, and charging current increases, and electric current can not continue the control for being reduced to cut-off current
It is processed, it will cause battery overcharge, thermal runaway occur, the utility model passes through Acquisition Circuit, control circuit and power-down circuit
Design can effectively prevent battery overcharge so that battery in constant voltage charging phase, increases electric current and just rising in value Δ I control.
Being illustrated in figure 3 the utility model one kind can prevent battery normal constant-current in the charger of overcharge from turning constant-voltage charge
Curve graph, it is known that, early period constant-current charging phase, charging current is constant, and charging voltage is gradually increasing, in later period constant-voltage charge rank
Section, charging voltage is constant, and charging current is gradually reduced.
Being illustrated in figure 4 the utility model one kind can prevent battery constant current in the charger of overcharge from turning constant-voltage charge cut-off
Electric current does not have the onset time to end overcharge curve graph, it is known that, with the increase of battery, after charge cutoff, by
In battery temperature rise, charging voltage has some reductions, and charging current can not continue the control point for being reduced to cut-off current, charging
Electric current continues to increase.
Being illustrated in figure 5 the utility model one kind can prevent battery constant current in the charger of overcharge from turning constant-voltage charge cut-off
Electric current does not have onset time cut-off overcharge to cause thermal runaway curve graph, since charging current can not continue to be reduced to cut-off current
Control point, cause charge the temperature rise of later period battery it is obvious, cause battery during constant-voltage charge, due to battery temperature rise, voltage
It reduces, charging current increases, and causes battery overcharge, thermal runaway occurs.
Being illustrated in figure 6 the utility model one kind can prevent from just rising in value in the charger of overcharge the setting of Δ I, and turn in constant current
During constant-voltage charge, increase the monitoring to electric current in constant voltage charging phase, but when electric current appearance increase phenomenon, charger body
Acquisition Circuit will acquire electric current minimum point be reference point power-off electric is controlled by control circuit when electric current rises to certain value
Road executes power operation, stops charging, and protection battery avoids thermal runaway phenomenon occur because of overcharge.
Finally, it should be noted that embodiment described above, only specific embodiment of the present utility model, to illustrate this
The technical solution of utility model, rather than its limitations, the protection scope of the utility model is not limited thereto, although referring to aforementioned
The utility model is described in detail in embodiment, those skilled in the art should understand that: it is any to be familiar with this skill
The technical staff in art field within the technical scope disclosed by the utility model, still can be to skill documented by previous embodiment
Art scheme modify or can readily occur in variation or equivalent replacement of some of the technical features；And these modifications,
Variation or replacement, the spirit and model of the utility model embodiment technical solution that it does not separate the essence of the corresponding technical solution
It encloses, should be covered within the scope of the utility model.Therefore, the protection scope of the utility model should be wanted with the right
Subject to the protection scope asked.
Claims (6)
1. one kind can prevent the charger of overcharge, including charger body, which is characterized in that the charger body includes defeated
Outlet, the output end are connected with battery, and the charger body further includes control circuit, Acquisition Circuit and power-down circuit, institute
It states Acquisition Circuit to be connected with the output end of charger, for acquiring the charging voltage signal and charging current signal of charger output
Size, the Acquisition Circuit is connected with control circuit, for collected signal to be sent to control circuit, the control electricity
Road is used to carry out calculation process to the signal that comes of acquisition, judges just rise in value Δ whether constant voltage charging phase charging current occurs
I, the control circuit includes timing circuit and comparison circuit, for determining the variation feelings of the charging current within certain a period of time
Condition, the control circuit are connected with power-down circuit, and the power-down circuit other end is connected with the output end of charger, for working as
Constant voltage charging phase occur charging current just rising in value Δ I when, the control circuit can control power-down circuit execute power operation, make
Charger body stops powering to output end.
2. the charger that one kind according to claim 1 can prevent overcharge, which is characterized in that the charger body is also
Including voice warning circuit, the voice warning circuit is connected with control circuit, for carrying out voice prompting after charging complete.
3. the charger that one kind according to claim 1 can prevent overcharge, which is characterized in that the charger body is also
Including input terminal, the input terminal is connected with control circuit, for electric energy to be sent to control circuit.
4. the charger that one kind according to claim 3 can prevent overcharge, which is characterized in that the input terminal it is another
End is connected with external power supply.
5. the charger that one kind according to claim 1 can prevent overcharge, which is characterized in that the control circuit includes
Control chip, the control chip can be carried out charging current by internal processes and just rised in value the setting of Δ I.
6. the charger that one kind according to claim 1 can prevent overcharge, which is characterized in that the power-down circuit includes
Cut-off switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822152434.XU CN209184281U (en) | 2018-12-19 | 2018-12-19 | A kind of charger preventing overcharge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822152434.XU CN209184281U (en) | 2018-12-19 | 2018-12-19 | A kind of charger preventing overcharge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209184281U true CN209184281U (en) | 2019-07-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822152434.XU Active CN209184281U (en) | 2018-12-19 | 2018-12-19 | A kind of charger preventing overcharge |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111211610A (en) * | 2020-02-21 | 2020-05-29 | 森克创能(天津)新能源科技有限公司 | Intelligent charger for zinc-nickel battery and battery pack |
-
2018
- 2018-12-19 CN CN201822152434.XU patent/CN209184281U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111211610A (en) * | 2020-02-21 | 2020-05-29 | 森克创能(天津)新能源科技有限公司 | Intelligent charger for zinc-nickel battery and battery pack |
| CN111211610B (en) * | 2020-02-21 | 2022-01-25 | 森克创能(天津)新能源科技有限公司 | Intelligent charger for zinc-nickel battery and battery pack |
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