CN201726162U - Lithium ion power battery guard plate - Google Patents

Lithium ion power battery guard plate Download PDF

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Publication number
CN201726162U
CN201726162U CN2010201883771U CN201020188377U CN201726162U CN 201726162 U CN201726162 U CN 201726162U CN 2010201883771 U CN2010201883771 U CN 2010201883771U CN 201020188377 U CN201020188377 U CN 201020188377U CN 201726162 U CN201726162 U CN 201726162U
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CN
China
Prior art keywords
ion
lithium
voltage
power cell
lithium ion
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
Application number
CN2010201883771U
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Chinese (zh)
Inventor
邢松柏
李新丽
胡巍
孙蕾
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TIANJIN SHENLU ENERGY CO., LTD.
Original Assignee
BEIJING TECROAD ENERGY Co Ltd
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Priority to CN2010201883771U priority Critical patent/CN201726162U/en
Application granted granted Critical
Publication of CN201726162U publication Critical patent/CN201726162U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model discloses a lithium ion power battery guard plate. The guard plate comprises an equalization control circuit and is used for receiving and consuming the charging current which exceeds the upper limit of safety voltage of the lithium ion power battery. The equalization control circuit comprises a controller, a first load resistance R1, a second load resistance R2, a voltage stabilizing tube ZD and a triode Q. The base electrode of the triode Q is connected with the positive electrode of the voltage stabilizing tube ZD through the second load resistance R2. The negative electrode of the voltage stabilizing tube ZD is directly connected with the controller. The emitting electrode of the triode Q is respectively connected with the positive electrode of the lithium ion power battery and the controller. The collecting electrode of the triode Q is respectively connected with the negative electrode of the lithium ion power battery and the controller through the first load resistance R1. The lithium ion power battery is switched into a charging circuit in parallel to partake the over-charged charging circuit. The utility model improves the capability of the lithium ion power battery guard plate to partake the charging current, ensures that large capacity lithium ion power battery can be charged safely, and prolongs the service life of the battery.

Description

A kind of lithium-ion-power cell baffle
Technical field
The utility model relates to power technique fields, relates in particular to a kind of lithium-ion-power cell baffle.
Background technology
Along with the development of twentieth century microelectric technique, various portable type electronic products are increasing, therefore for these electronic products provide the power supply of power increasing performance requirement just arranged also.In many power supply products, lithium-ion-power cell has higher energy storage, more long-life, and light weight, environmental protection, therefore extensive use in every field.
At present, lithium-ion-power cell is reusable rechargeable battery as a kind of novel energy of environmental protection; Its charging method roughly has two kinds, i.e. constant current charge and constant-potential charge.In existing charging device, its charging circuit adopts the charging modes of constant current mostly.So-called constant current charge is meant that charging current is invariable in charging process, and along with the carrying out of charging, active material is resumed, and the electrode reaction area constantly dwindles, and the polarization of battery is increased gradually, thereby reaches the purpose to the lithium-ion-power cell charging.Carry out in the process of constant current charge at lithium-ion-power cell (or lithium-ion-power cell group), surpassed upper limit safe voltage (being 3.65V), just show that over-charging of battery has taken place lithium-ion-power cell if the voltage of cell is full of amount; Over-charging of battery not only reduces the useful life of battery, and has the danger of blast.The phenomenon of over-charging of battery occurs for fear of lithium-ion-power cell (or lithium-ion-power cell group), prior art has mainly adopted the method for shunting power consumption; So-called shunting power consumption is meant charging circuit is linked to each other with the lithium-ion-power cell baffle; when the voltage of lithium-ion-power cell (or the monomer lithium-ion-power cell in the lithium-ion-power cell group) is full of amount and reaches upper limit safe voltage; the lithium-ion-power cell baffle just starts the shunting function; consume the charging current (being the output current of charging circuit) that exceeds upper limit safe voltage, thereby guarantee that lithium-ion-power cell (or lithium-ion-power cell group) can carry out constant current charge safely.
In the technique scheme, there are the following problems at least:
The first, existing shunting power consumption method only can be shared the electric current of firm discharge, can not change along with the variation that exceeds upper limit safe voltage part voltage, so shunting effect is not very desirable;
The second, the output current of existing lithium-ion-power cell charging circuit is 2A to 30A, and the charging current that existing lithium-ion-power cell baffle can be shared consumption is 200MA; Its shunting ability only is 1/10th of a charging current, can't satisfy the needs that jumbo power-type lithium ion electrokinetic cell (or large-capacity power type lithium ion power battery pack) carries out safe charging.
Summary of the invention
The purpose of this utility model provides a kind of lithium-ion-power cell baffle; so that improve the shunting energy dissipation capacity of lithium-ion-power cell baffle; thereby jumbo power-type lithium ion electrokinetic cell (or large-capacity power type lithium ion power battery pack) can be charged safely, and guarantee that the voltage of every monomer power-type lithium ion electrokinetic cell in the large-capacity power type lithium ion power battery pack can both be balanced consistent.
The purpose of this utility model is achieved through the following technical solutions:
A kind of lithium-ion-power cell baffle, comprise balancing control circuit, be used to control charging circuit lithium-ion-power cell is charged, described balancing control circuit comprises: controller, first load electricity R1, the second load resistance R2, voltage-stabiliser tube ZD and triode Q;
The base stage of described triode Q links to each other with the positive pole of voltage-stabiliser tube ZD by the second load resistance R2, and the negative pole of described voltage-stabiliser tube ZD directly joins with described controller;
The emitter of described triode Q joins with the negative pole and the described controller of described lithium-ion-power cell respectively;
The collector electrode of described triode Q joins by the positive pole and the described controller of first load electricity R1 and described lithium-ion-power cell.
Preferably, described controller comprises the high accuracy low power consuming voltage checking chip of the magnitude of voltage that is used to the negative pole that detects the voltage of lithium-ion-power cell and control described voltage-stabiliser tube ZD.
Preferably, the burning voltage of described voltage-stabiliser tube ZD is between 2.8V to 3.6V.
Preferably, the burning voltage of described voltage-stabiliser tube ZD is 2.8V, 3.0V, 3.2V or 3.6V.
A kind of lithium-ion-power cell baffle comprises one or more balancing control circuits, and each balancing control circuit all connects a lithium-ion-power cell.
The technical scheme that is provided by above-mentioned the utility model as can be seen, lithium-ion-power cell baffle that the utility model embodiment provides adopt make triode Q base stage successively by the second load resistance R2 that connecting and voltage-stabiliser tube ZD again with the controller ways of connecting, the shunting ability of lithium-ion-power cell baffle can be changed along with the variation that exceeds upper limit safe voltage part voltage, and its maximum shunt ability has been brought up to 2A; That is to say that the utility model embodiment improves the shunting ability that the lithium-ion-power cell baffle is shared charging current, thereby jumbo power-type lithium ion electrokinetic cell can be charged safely, and then prolonged battery useful life.
Description of drawings
In order to be illustrated more clearly in the technical scheme of the utility model embodiment, the accompanying drawing of required use is done to introduce simply in will describing embodiment below, apparently, accompanying drawing in describing below only is embodiment more of the present utility model, for those of ordinary skill in the art, under the prerequisite of not paying creative work, can also obtain other accompanying drawings according to these accompanying drawings.
Fig. 1 is the principle schematic of existing lithium-ion-power cell baffle;
The principle schematic one of the lithium-ion-power cell baffle that Fig. 2 provides for the utility model embodiment;
Fig. 3 is the performance chart of existing lithium-ion-power cell baffle;
The performance chart of the lithium-ion-power cell baffle that Fig. 4 provides for the utility model embodiment;
The principle schematic two of the lithium-ion-power cell baffle that Fig. 5 provides for the utility model embodiment.
Embodiment
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on embodiment of the present utility model, those of ordinary skills belong to protection range of the present utility model not making the every other embodiment that is obtained under the creative work prerequisite.
Embodiment one
As shown in Figure 1, Figure 2, Figure 3 and Figure 4, a kind of lithium-ion-power cell baffle comprises balancing control circuit, is used to receive and consume the charging current that exceeds after the lithium-ion-power cell upper limit safe voltage, and the control charging circuit charges to lithium-ion-power cell; The specific implementation structure of described balancing control circuit comprises: controller, first load electricity R1, the second load resistance R2, voltage-stabiliser tube ZD and triode Q;
The base stage of described triode Q links to each other with the positive pole of voltage-stabiliser tube ZD by the second load resistance R2, and the negative pole of described voltage-stabiliser tube ZD directly joins with described controller;
The emitter of described triode Q joins with the negative pole and the described controller of described lithium-ion-power cell respectively;
The collector electrode of described triode Q joins by the positive pole and the described controller of first load electricity R1 and described lithium-ion-power cell;
The lithium-ion-power cell charging circuit that inserts in parallel is realized charging process.
Wherein, the operation principle of corresponding controllers is as follows: described controller comprises high accuracy low power consuming voltage checking chip, be used for detecting in real time the voltage of lithium-ion-power cell, to be higher than upper limit safe voltage (should be certain value between the 3.6V to 4.2V when the voltage of lithium-ion-power cell is full of amount, concrete numerical value is different because of different product) time, the negative pole of voltage-stabiliser tube ZD transfers high level to by low level; When the difference that surpasses voltage-stabiliser tube ZD puncture voltage when the voltage of lithium-ion-power cell reaches 0.7V, begin to shunt.
Particularly; as depicted in figs. 1 and 2; the balancing control circuit that the lithium-ion-power cell baffle adopts now lacks a voltage-stabiliser tube ZD than the balancing control circuit that provides in the utility model; its burning voltage is between 2.8V to 3.6V; but be preferably 2.8V, 3.0V, 3.2V or 3.6V, can select the suitable voltage-stabiliser tube ZD of voltage stabilizing value according to the upper voltage limit (3.6-4.2V) of different product lithium-ion-power cell.
As shown in Figure 3, the balancing control circuit that the lithium-ion-power cell baffle adopts now, when voltage begins to start the shunting function during for 3.6V, but its maximum shunt ability only is 200MA;
As shown in Figure 4, the balancing control circuit that provides in the utility model, when voltage begins to start the shunting function during for 3.65V, its electric current of sharing rises to the 2A of maximum shunt ability gradually from less 200MA, and it is 2.80V that its lower limit is closed voltage; In charging process, this balancing control circuit can according to the voltage that cell voltage surpasses upper limit safe voltage control share the size of electric current, the electric current shared of many equilibriums is big more more for the voltage that surpasses, the electric current shared of few equilibrium is more little more for the voltage that surpasses, thereby shares the optimization efficiency of electric current when having promoted charging.
Need to prove; as shown in Figure 5; described lithium-ion-power cell baffle also can comprise one or more balancing control circuits; each balancing control circuit all connects a lithium-ion-power cell, so just can adopt a plurality of balancing control circuits to carry out equalizing charge for a plurality of lithium-ion-power cells simultaneously.
As seen, the realization of the utility model embodiment can change the shunting ability of lithium-ion-power cell baffle according to the amount of charged voltage that surpasses upper limit safe voltage, and its maximum shunt ability has been brought up to 2A; That is to say that the utility model embodiment improves the shunting ability that the lithium-ion-power cell baffle is shared charging current, thereby jumbo power-type lithium ion electrokinetic cell can be charged safely and fast, and then prolonged battery useful life.
The above; it only is the preferable embodiment of the utility model; but protection range of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the variation that can expect easily or replacement all should be encompassed within the protection range of the present utility model.Therefore, protection range of the present utility model should be as the criterion with the protection range of claims.

Claims (5)

1. lithium-ion-power cell baffle, comprise balancing control circuit, be used to control charging circuit lithium-ion-power cell is charged, it is characterized in that, described balancing control circuit comprises: controller, first load electricity R1, the second load resistance R2, voltage-stabiliser tube ZD and triode Q;
The base stage of described triode Q links to each other with the positive pole of voltage-stabiliser tube ZD by the second load resistance R2, and the negative pole of described voltage-stabiliser tube ZD directly joins with described controller;
The emitter of described triode Q joins with the negative pole and the described controller of described lithium-ion-power cell respectively;
The collector electrode of described triode Q joins by the positive pole and the described controller of first load electricity R1 and described lithium-ion-power cell.
2. lithium-ion-power cell baffle according to claim 1 is characterized in that, described controller comprises the high accuracy low power consuming voltage checking chip of the magnitude of voltage that is used to the negative pole that detects the voltage of lithium-ion-power cell and control described voltage-stabiliser tube ZD.
3. lithium-ion-power cell baffle according to claim 1 and 2 is characterized in that the burning voltage of described voltage-stabiliser tube ZD is between 2.8V to 3.6V.
4. lithium-ion-power cell baffle according to claim 3 is characterized in that, the burning voltage of described voltage-stabiliser tube ZD is 2.8V, 3.0V, 3.2V or 3.6V.
5. a lithium-ion-power cell baffle is characterized in that, comprises one or more balancing control circuits, and each balancing control circuit all connects a lithium-ion-power cell.
CN2010201883771U 2010-05-12 2010-05-12 Lithium ion power battery guard plate Expired - Fee Related CN201726162U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010201883771U CN201726162U (en) 2010-05-12 2010-05-12 Lithium ion power battery guard plate

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Application Number Priority Date Filing Date Title
CN2010201883771U CN201726162U (en) 2010-05-12 2010-05-12 Lithium ion power battery guard plate

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CN201726162U true CN201726162U (en) 2011-01-26

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105552463A (en) * 2015-06-30 2016-05-04 宇龙计算机通信科技(深圳)有限公司 Storage battery assembly and terminal
WO2020107478A1 (en) * 2018-11-30 2020-06-04 北京比特大陆科技有限公司 Voltage equalization circuit, voltage equalization method and device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105552463A (en) * 2015-06-30 2016-05-04 宇龙计算机通信科技(深圳)有限公司 Storage battery assembly and terminal
CN105552463B (en) * 2015-06-30 2018-05-15 宇龙计算机通信科技(深圳)有限公司 A kind of accumulator cell assembly and terminal
WO2020107478A1 (en) * 2018-11-30 2020-06-04 北京比特大陆科技有限公司 Voltage equalization circuit, voltage equalization method and device

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C14 Grant of patent or utility model
GR01 Patent grant
C56 Change in the name or address of the patentee

Owner name: TIANJIN SHENLU ENERGY CO., LTD.

Free format text: FORMER NAME: BEIJING TECROAD ENERGY CO., LTD.

CP03 Change of name, title or address

Address after: 22 No. 300300 Tianjin District of Dongli City Huaming Road

Patentee after: TIANJIN SHENLU ENERGY CO., LTD.

Address before: 100176 Beijing City, Rongchang Economic Development Zone Industrial Park Longsheng Street No. 7 No. A1-101

Patentee before: Beijing Tecroad Energy Co., Ltd.

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

Granted publication date: 20110126

Termination date: 20180512

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