CN203632310U - External charge equalization device for lithium battery - Google Patents

External charge equalization device for lithium battery Download PDF

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Publication number
CN203632310U
CN203632310U CN201320829208.5U CN201320829208U CN203632310U CN 203632310 U CN203632310 U CN 203632310U CN 201320829208 U CN201320829208 U CN 201320829208U CN 203632310 U CN203632310 U CN 203632310U
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CN
China
Prior art keywords
relay
lithium battery
battery group
parallel
electrically connected
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Expired - Fee Related
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CN201320829208.5U
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Chinese (zh)
Inventor
吴祖榆
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TIANYU COMMUNICATIONS TECHNOLOGY (KUNSHAN) Co Ltd
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TIANYU COMMUNICATIONS TECHNOLOGY (KUNSHAN) Co Ltd
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Priority to CN201320829208.5U priority Critical patent/CN203632310U/en
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  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The utility model discloses an external charge equalization device for a lithium battery. The lithium battery is composed of a plurality of lithium battery cells connected in series. The charge equalization device comprises a micro processor and a plurality of relay control circuits to cooperate with the lithium battery cells. The micro processor detects voltage signals of the plurality of lithium battery cells, and controls the connection and disconnection of the plurality of the relay control circuits. The connection and disconnection of the plurality of relay control circuits correspondingly control the connection and disconnection between the plurality of lithium battery cells and a charger. According to the utility model, the external charge equalization device, which is separated from a protection control board, is used for equalization adjustment of the lithium battery cells, so that the cost of the circuit is reduced, and the charge equalization device is reasonable in structure and simple in operation, and is capable of carrying out equalization adjustment on every lithium battery cell, thereby prolonging the service life of the lithium battery.

Description

The external charging equalization apparatus of lithium battery group
Technical field
The utility model relates to the balanced way technical field of lithium battery group, and a kind of external charging equalization apparatus of lithium battery group is specifically provided.
Background technology
Multi-series lithium battery group is widely used in the multiple occasions such as electric automobile, electric bicycle, memory device.But lithium battery is in charge and discharge cycles process, may be due to the property difference between serial lithium battery core, can shine in use for some time unbalanced phenomena: first part lithium cell core fills full in charging process, make protective circuit enter the state of overcharging, part lithium cell core is first emptying in discharge process, makes lithium battery group enter the state of putting; Such state just can cause the reduction in going down of lithium battery group overall performance and useful life through long-term use.
In order to solve above-mentioned drawback, existing lithium battery group conventionally arranges an equalizing circuit lithium cell core is carried out to equilibrium adjusting on protection control board, makes lithium battery group entirety reach balanced effect.But such design has but increased circuit cost, and euqalizing current is also less, greatly reduce the charge and discharge circulation life of lithium battery group.
Summary of the invention
In order to overcome above-mentioned defect, the utility model provides a kind of external charging equalization apparatus of lithium battery group, this charging equalization apparatus is simple to operate, not only can carry out well balanced adjusting to the multiple lithium cell cores in lithium battery group, but also extend the useful life of lithium battery group.
The utility model for the technical scheme that solves its technical problem and adopt is: a kind of external charging equalization apparatus of lithium battery group, this lithium battery group is connected in series and is formed by multiple lithium cell cores, this charging equalization apparatus comprises microprocessor and multiple control relay circuit matching with lithium cell core, described microprocessor can be detected the voltage signal of the plurality of lithium cell core, and control the open and close of the plurality of control relay circuit simultaneously, and the open and close of the plurality of control relay circuit can be controlled accordingly the plurality of lithium cell core and disconnects and connect in charger.
As further improvement of the utility model, described microprocessor is mainly integrated with AD detecting module, voltage comparison module and main control module, described AD detecting module has the sense terminal that multichannel is in parallel, the output of described AD detecting module is electrically connected on the input of described voltage comparison module, and the output of described voltage comparison module is electrically connected on the input of described main control module.
As further improvement of the utility model, the plurality of control relay circuit respectively includes one first relay and one second relay, and described the first relay and the second relay are open type relay; And a contact of the plurality of the first relay is the corresponding positive pole that is electrically connected on the plurality of lithium cell core respectively, and another contact of the plurality of the first relay is in parallel and is connected in the positive pole of described charger;
One contact of the plurality of the second relay is the corresponding negative pole that is electrically connected on the plurality of lithium cell core respectively, and another contact of the plurality of the second relay is in parallel and is connected in the negative pole of described charger.
As further improvement of the utility model, another contact of the plurality of the first relay and another contact of the plurality of the second relay are also connected in parallel in the control end of described main control module simultaneously.
As further improvement of the utility model, also be provided with an overcharge protection circuit, this overcharge protection circuit comprises pulse-width modulation voltage-dropping type DC/DC converter and the 3rd relay, the input of described pulse-width modulation voltage-dropping type DC/DC converter is electrically connected on the positive pole of described charger, and another contact of the plurality of the first relay is in parallel and is connected in the output of described pulse-width modulation voltage-dropping type DC/DC converter; Described the 3rd relay is closed type relay, and described the 3rd relay is connected in parallel between the input and output of described pulse-width modulation voltage-dropping type DC/DC converter.
As further improvement of the utility model, also be provided with a DC/DC pressurizer, the input of described DC/DC pressurizer is electrically connected on the control end of described main control module, and another contact of the plurality of the first relay is also connected in parallel in the output of described DC/DC pressurizer simultaneously.
As further improvement of the utility model, be also provided with a LCD display module, this LCD display module is electrically connected on described main control module.
The beneficial effects of the utility model are: depart from the external charging equalization apparatus of protection control board lithium cell core is carried out to equilibrium adjusting by arranging one; not only reduce circuit cost; and this charging equalization apparatus is rational in infrastructure, simple to operate; can carry out well balanced adjusting to each lithium cell core, extend the useful life of lithium battery group.
Accompanying drawing explanation
Fig. 1 is operation principle schematic diagram of the present utility model;
Fig. 2 is the operation principle schematic diagram of microprocessor described in the utility model.
By reference to the accompanying drawings, make the following instructions:
1---microprocessor 2---charger
10---AD detecting module 11---voltage comparison module
12---main control module 3---DC/DC pressurizer
4---LCD display module 5---DC/DC converter
Embodiment
Below with reference to figure, preferred embodiment of the present utility model is elaborated.
The external charging equalization apparatus of a kind of lithium battery group described in the utility model, this lithium battery group is connected in series and is formed by multiple lithium cell cores, this charging equalization apparatus comprises microprocessor 1 and multiple control relay circuit matching with lithium cell core, described microprocessor 1 can be detected the voltage signal of the plurality of lithium cell core, and control the open and close of the plurality of control relay circuit according to voltage signal, and the open and close of the plurality of control relay circuit can be controlled accordingly the plurality of lithium cell core and disconnects and connect in charger 2 simultaneously.
In the present embodiment, described microprocessor 1 is mainly integrated with AD detecting module 10, voltage comparison module 11 and main control module 12, described AD detecting module 10 has the sense terminal that multichannel is in parallel, the output of described AD detecting module 10 is electrically connected on the input of described voltage comparison module 11, and the output of described voltage comparison module 11 is electrically connected on the input of described main control module 12.
In the present embodiment, the plurality of control relay circuit respectively includes one first relay R Y1 and one second relay R Y2, and described the first relay R Y1 and the second relay R Y2 are open type relay; And a contact of the plurality of the first relay R Y1 is the corresponding positive pole that is electrically connected on the plurality of lithium cell core respectively, and another contact of the plurality of the first relay R Y1 is in parallel and is connected in the positive pole of described charger 2;
A contact of the plurality of the second relay R Y2 is the corresponding negative pole that is electrically connected on the plurality of lithium cell core respectively, and another contact of the plurality of the second relay R Y2 is in parallel and is connected in the negative pole of described charger 2.
In the present embodiment, another contact of another contact of the plurality of the first relay R Y1 and the plurality of the second relay R Y2 is also connected in parallel in the control end of described main control module 12 simultaneously.
In the present embodiment, also be provided with an overcharge protection circuit, this overcharge protection circuit comprises pulse-width modulation voltage-dropping type DC/DC converter 5 and the 3rd relay R Y3, the input of described pulse-width modulation voltage-dropping type DC/DC converter 5 is electrically connected on the positive pole of described charger 2, and another contact of the plurality of the first relay R Y1 is in parallel and is connected in the output of described pulse-width modulation voltage-dropping type DC/DC converter 5; Described the 3rd relay R Y3 is closed type relay, and described the 3rd relay R Y3 is connected in parallel between the input and output of described pulse-width modulation voltage-dropping type DC/DC converter 5.
In the present embodiment, also be provided with a DC/DC pressurizer 3, the input of described DC/DC pressurizer is electrically connected on the control end of described main control module 12, and another contact of the plurality of the first relay R Y1 is also connected in parallel in the output of described DC/DC pressurizer simultaneously.
In the present embodiment, also be provided with a LCD display module 4, this LCD display module is electrically connected on described main control module 12, and this LCD display module is for showing voltage, electric current, the temperature information of the plurality of lithium cell core, be convenient to user the use state of understanding lithium battery group.

Claims (7)

1. the external charging equalization apparatus of a lithium battery group, this lithium battery group is connected in series and is formed by multiple lithium cell cores, it is characterized in that: this charging equalization apparatus comprises microprocessor (1) and multiple control relay circuit matching with lithium cell core, described microprocessor (1) can be detected the voltage signal of the plurality of lithium cell core, and control the open and close of the plurality of control relay circuit, and the open and close of the plurality of control relay circuit can be controlled accordingly the plurality of lithium cell core and disconnects and connect in charger (2) simultaneously.
2. the external charging equalization apparatus of lithium battery group according to claim 1, it is characterized in that: described microprocessor (1) is mainly integrated with AD detecting module (10), voltage comparison module (11) and main control module (12), described AD detecting module (10) has the sense terminal that multichannel is in parallel, the output of described AD detecting module (10) is electrically connected on the input of described voltage comparison module (11), and the output of described voltage comparison module (11) is electrically connected on the input of described main control module (12).
3. the external charging equalization apparatus of lithium battery group according to claim 2, it is characterized in that: the plurality of control relay circuit respectively includes one first relay (RY1) and one second relay (RY2), and described the first relay (RY1) and the second relay (RY2) are open type relay; And a contact of the plurality of the first relay (RY1) is the corresponding positive pole that is electrically connected on the plurality of lithium cell core respectively, and another contact of the plurality of the first relay (RY1) is in parallel and is connected in the positive pole of described charger (2);
One contact of the plurality of the second relay (RY2) is the corresponding negative pole that is electrically connected on the plurality of lithium cell core respectively, and another contact of the plurality of the second relay (RY2) is in parallel and is connected in the negative pole of described charger (2).
4. the external charging equalization apparatus of lithium battery group according to claim 3, is characterized in that: another contact of another contact of the plurality of the first relay (RY1) and the plurality of the second relay (RY2) is also connected in parallel in the control end of described main control module (12) simultaneously.
5. the external charging equalization apparatus of lithium battery group according to claim 3, it is characterized in that: be also provided with an overcharge protection circuit, this overcharge protection circuit comprises pulse-width modulation voltage-dropping type DC/DC converter (5) and the 3rd relay (RY3), the input of described pulse-width modulation voltage-dropping type DC/DC converter (5) is electrically connected on the positive pole of described charger (2), and another contact of the plurality of the first relay (RY1) is in parallel and is connected in the output of described pulse-width modulation voltage-dropping type DC/DC converter (5); Described the 3rd relay (RY3) is closed type relay, and described the 3rd relay (RY3) is connected in parallel between the input and output of described pulse-width modulation voltage-dropping type DC/DC converter (5).
6. the external charging equalization apparatus of lithium battery group according to claim 4, it is characterized in that: be also provided with a DC/DC pressurizer (3), the input of described DC/DC pressurizer is electrically connected on the control end of described main control module (12), and another contact of the plurality of the first relay (RY1) is also connected in parallel in the output of described DC/DC pressurizer simultaneously.
7. the external charging equalization apparatus of lithium battery group according to claim 2, is characterized in that: be also provided with a LCD display module (4), this LCD display module is electrically connected on described main control module (12).
CN201320829208.5U 2013-12-16 2013-12-16 External charge equalization device for lithium battery Expired - Fee Related CN203632310U (en)

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CN201320829208.5U CN203632310U (en) 2013-12-16 2013-12-16 External charge equalization device for lithium battery

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103633710A (en) * 2013-12-16 2014-03-12 天宇通讯科技(昆山)有限公司 External charge equalizing device of lithium battery pack

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103633710A (en) * 2013-12-16 2014-03-12 天宇通讯科技(昆山)有限公司 External charge equalizing device of lithium battery pack

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C14 Grant of patent or utility model
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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20140604

Termination date: 20171216

CF01 Termination of patent right due to non-payment of annual fee