CN203983969U - A kind of based on balanced trigger-type lithium battery physical protection device - Google Patents
A kind of based on balanced trigger-type lithium battery physical protection device Download PDFInfo
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- CN203983969U CN203983969U CN201420416193.4U CN201420416193U CN203983969U CN 203983969 U CN203983969 U CN 203983969U CN 201420416193 U CN201420416193 U CN 201420416193U CN 203983969 U CN203983969 U CN 203983969U
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Abstract
The utility model discloses a kind of based on balanced trigger-type lithium battery physical protection device, comprise and be subject to temperature controlled break protective switch and battery detecting module, battery detecting module comprises a voltage acquisition unit, voltage acquisition unit respectively with the grid of metal-oxide-semiconductor, first, the base stage of the second triode connects, the drain electrode of metal-oxide-semiconductor be connected voltage acquisition unit positive pole, the source electrode of metal-oxide-semiconductor connects voltage acquisition unit negative pole by heat-generating units, heat-generating units is fitted in a side of break protective switch, first, the emitter of the second triode interconnects, first, between the collector electrode of the second triode, series connection is by first, the second resistance, first, the collector electrode of the second triode is connected with controller or charger.The utility model unites two into one cell balancing and protection triggering technique, forms simple and reliablely, and portfolio effect is outstanding; the li-ion cell protection device that safeguard protection is thorough; can effectively control temperature anomaly, significantly promote the useful life of battery, ensure the capacity of battery.
Description
Technical field
The utility model relates to a kind of li-ion cell protection device, relates in particular to a kind of based on balanced trigger-type lithium battery physical protection device.
Background technology
Its mechanism of balancing disk that tradition lithium battery is provided with is roughly divided into two kinds:
One is passive equilibrium, and its principle is simple, is widely used, and cost is low.In battery pack series connection is used, due to the problem of battery consistency, in the charging process of being everlasting, certain battery core voltage can reach in advance and overcharge point (as 4.2v), by electronic switch, this economize on electricity core is carried out to low discharging current, when battery core voltage low when the normal point (as 4.1v), stopcock, at this moment the battery core voltage of series connection is progressively with to overcharge battery core consistent on the same group, and this balanced mode can be repaired whole Battery pack, extend battery, and ensure the capacity of whole Battery pack.
But the shortcoming of this passive equilibrium is:
1, euqalizing current is very little, and generally at 20-50mA, portfolio effect is not good, even there is no effect, and equilibrium is carried out in the charging that often will lead in a few days.
2, the heat that equalizing resistance produces is difficult to process, even if electric current is very little, also accumulation of heat causes battery performance to decline in a large number, and even because of the overheated potential safety hazard that causes, the difficulty of heat management is to cause designing complicated reason.
3, because of poor effect, this balanced mode is seldom in depth studied, and in order to reduce costs, extremely uses low cost device, and reliability can not be guaranteed, and device reliability in motive use of milliampere level is not high simultaneously, often occurs the problem of battery core emptying.
The second is active equalization, and its principle is by complicated circuit theory, and the power conversion of high voltage battery core is realized to equilibrium in low-voltage battery core, and effect is relatively good in theory, but also can have following problem:
1, active equalization Current Control difficulty is large, and former battery core is in series connection, and energy is exchanged in the in fact similar parallel connection of transfer process, very risky.
2, need complicated monitoring and judged high-low pressure and implemented conversion by software, its system is too complicated, and reliability is low, and cost is high, at present except very high-end application, cannot promote.
The larger dispute of the balanced existence at present of lithium battery, main cause is exactly the defect of above-mentioned these two kinds of traditional lithium battery balanced mode, cannot on portfolio effect and heat management, realize balance.
Utility model content
For overcoming the defect of traditional lithium battery equilibrium, it is a kind of based on balanced trigger-type lithium battery physical protection device that the utility model is intended to provide.
For realizing above-mentioned technical purpose, reach above-mentioned technique effect, the utility model is achieved through the following technical solutions:
A kind of based on balanced trigger-type lithium battery physical protection device, comprise and be subject to temperature controlled break protective switch and battery detecting module, in the loop at the each lithium battery module place in lithium battery, be provided with a described break protective switch, on each described lithium battery module, be provided with a described battery detecting module, one end of described battery detecting module is connected with the both positive and negative polarity of described lithium battery module, the other end is connected with charger or controller, described battery detecting module comprises a heat-generating units, described heat-generating units is fitted in a side of described break protective switch,
In each described battery detecting module, also include respectively voltage acquisition unit, metal-oxide-semiconductor, the first triode and the second triode, described voltage acquisition unit is provided with and overcharges signal output part, crosses discharge signal output, zero voltage signal output, for connecting the positive terminal of described lithium battery module positive pole and negative pole end for being connected described lithium battery module negative pole; The signal output part that overcharges of described voltage acquisition unit is connected with the grid of described metal-oxide-semiconductor, the positive terminal of described voltage acquisition unit is connected with the drain electrode of described metal-oxide-semiconductor, the negative pole end of described voltage acquisition unit is connected with the source electrode of described metal-oxide-semiconductor by described heat-generating units, the zero voltage signal output of described voltage acquisition unit is connected with the base stage of described the first triode by the first diode, and the discharge signal output of crossing of described voltage acquisition unit is connected with the base stage of described the second triode by the second diode; The emitter of described the first triode is connected with the emitter of described the second triode, the collector electrode of described the first triode is connected with the collector electrode of described the second triode with the second resistance by the first resistance, and the collector electrode of described first, second triode is connected with controller or charger.
Further, described break protective switch is memory metal switch, expansion of metal formula switch or other temperature switches; Described protective switch of the short circuit is made up of movable contact end and stationary contact end, and described movable contact end contacts with described stationary contact end.
Preferably, described protective switch of the short circuit is memory metal switch, and described movable contact end is made up of marmem, and described movable contact end and described stationary contact end top layer are silver-plated.
Preferably, described protective switch of the short circuit is expansion of metal formula switch, and described movable contact end is made up of bimetal leaf.
Under normal temperature, the contact of break protective switch both sides contacts, while reaching memory temperature, and the contact separation of both sides.
Operation principle of the present utility model is as follows:
In the time of certain economize on electricity core overvoltage in certain lithium battery module, metal-oxide-semiconductor is opened loop, by overcharging output line, the electric current that exceedes charging current is input into heat-generating units, for heating, directly suppresses the generation of over-charging of battery.Because the switch module in each lithium battery module loop is memory metal break protective switch; this size that overcharges electric current can be carried out free selection as requested; only need to adjust the specification of signal cable, all can accept at 1A-100A, guarantee that lithium battery thoroughly stops the generation overcharging.The utility model converts e-management to heat management, and the heat producing when heat-generating units reaches set point, and memory metal break protective switch is triggered, and directly carries out open circuit protection.After heat leaves, battery is returned to normal temperature, and memory metal break protective switch relies on its physical characteristic automatically to be recovered; connect circuit; when again run into repeat while overcharging before work, whole process produces the measure that is interrupted protection, can effectively control temperature anomaly.
In voltage acquisition unit, be provided with no-voltage monitoring, can and charger (or controller) carry out information interaction.Under extremely abnormal, in the time there is 0v in battery core, the akinesia of traditional protection circuit; and the utility model can be informed charger (or controller), charger (or controller) carries out alarm, and stops at once charging; also to overhaul battery if needed, avoid security incident.
The euqalizing current of ampere level is the optimal euqalizing current of lithium battery, and its effect is far above traditional protection circuit.The interruption control of heat management can be played effective protection to battery overheated again, significantly promotes the useful life of battery, ensures the capacity of battery.
Compared with prior art, the beneficial effects of the utility model are:
Feature of the present utility model is that cell balancing and protection triggering technique are united two into one, and forms simple and reliablely, and portfolio effect is outstanding, the li-ion cell protection device that safeguard protection is thorough.The utility model utilizes the shape memory characteristic of metal heat-expansion shrinkage, by the ingenious structure of bimetal leaf, as the protection switch of temperature triggered.The utility model recycling charge balancing, by the inhibition electric current that first charges, carries out equilibrium; and will suppress the function of current in memory metal switch, by produce heat accumulation at restriceted envelope, when accumulation of heat arrive memory temperature; trigger memory metal switch and disconnect protection, after temperature sheds, memory metal switch recovers; proceed charging; repeatedly like this, whole process produces the measure that is interrupted protection, can effectively control temperature anomaly; significantly promote the useful life of battery, ensured the capacity of battery.
Above-mentioned explanation is only the general introduction of technical solutions of the utility model, in order to better understand technological means of the present utility model, and can be implemented according to the content of specification, below with preferred embodiment of the present utility model and coordinate accompanying drawing to be described in detail as follows.Embodiment of the present utility model is provided in detail by following examples and accompanying drawing thereof.
Brief description of the drawings
Accompanying drawing described herein is used to provide further understanding of the present utility model, forms the application's a part, and schematic description and description of the present utility model is used for explaining the utility model, does not form improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is overall structure block diagram of the present utility model;
Fig. 2 is the circuit theory diagrams of battery detecting module of the present utility model;
Fig. 3 is the structural representation of memory metal protective switch of the short circuit under normal temperature;
Fig. 4 is the structural representation of memory metal protective switch of the short circuit under design temperature.
Number in the figure explanation: 1, lithium battery module; 2, break protective switch; 3, battery detecting module; 4, voltage acquisition unit; 5, charger or controller; 6, heat-generating units; M, metal-oxide-semiconductor; Q1, the first triode; Q2, the second triode; CO, overcharge signal output part; DO, mistake discharge signal output; 0V, zero voltage signal output; B+, positive terminal; B-, negative pole end; D1, the first diode; D2, the second diode; R1, the first resistance; R2, the second resistance; Q1, the first triode; Q2, the second triode; 201, moving contact; 202, stationary contact end.
Embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the utility model in detail.
Shown in Figure 1, a kind of based on balanced trigger-type lithium battery physical protection device, comprise and be subject to temperature controlled break protective switch 2 and battery detecting module 3, in the loop at each lithium battery module 1 place in lithium battery, be provided with a described break protective switch 2, on each described lithium battery module 1, be provided with a described battery detecting module 3, one end of described battery detecting module 3 is connected with the both positive and negative polarity of described lithium battery module 1, the other end is connected with charger or controller 5, described battery detecting module 3 comprises a heat-generating units 6, described heat-generating units 6 is fitted in a side of described break protective switch 2,
Shown in Figure 2, in each described battery detecting module 3, also include respectively voltage acquisition unit 4, metal-oxide-semiconductor M, the first triode Q1 and the second triode Q2, described voltage acquisition unit 4 is provided with and overcharges signal output part CO, crosses discharge signal output DO, zero voltage signal output 0V, for connecting the positive terminal B+ of described lithium battery module 1 positive pole and negative pole end B-for being connected described lithium battery module 1 negative pole; The signal output part CO that overcharges of described voltage acquisition unit 4 is connected with the grid of described metal-oxide-semiconductor M, the positive terminal B+ of described voltage acquisition unit 4 is connected with the drain electrode of described metal-oxide-semiconductor M, the negative pole end B-of described voltage acquisition unit 4 is connected with the source electrode of described metal-oxide-semiconductor M by described heat-generating units 6, the zero voltage signal output 0V of described voltage acquisition unit 4 is connected with the base stage of described the first triode Q1 by the first diode D1, and the discharge signal output DO that crosses of described voltage acquisition unit 4 is connected with the base stage of described the second triode Q2 by the second diode D2; The emitter of described the first triode Q1 is connected with the emitter of described the second triode Q2, the collector electrode of described the first triode Q1 is connected with the collector electrode of described the second triode Q2 with the second resistance R 2 by the first resistance R 1, described first, second triode Q1, the collector electrode of Q2 is connected with controller or charger 5.
Further, shown in Fig. 3, Fig. 4, described break protective switch 2 is memory metal switch, expansion of metal formula switch or other temperature switches; Described protective switch of the short circuit 2 is made up of movable contact end 201 and stationary contact end 202, and described movable contact end 201 contacts with described stationary contact end 202.
Preferably, described protective switch of the short circuit 2 is memory metal switch, and described movable contact end 201 is made up of marmem, and described movable contact end 201 and described stationary contact end 202 top layers are silver-plated.
Preferably, described protective switch of the short circuit 2 is expansion of metal formula switch, and described movable contact end 201 is made up of bimetal leaf.
Taking memory metal switch switch as example, in the time of certain economize on electricity core overvoltage in certain lithium battery module, metal-oxide-semiconductor is opened loop, by overcharging output line, the electric current that exceedes charging current is input into heat-generating units, for heating, directly suppresses the generation of over-charging of battery.Because the switch module in each lithium battery module loop is memory metal switch, this size that overcharges electric current can be carried out free selection as requested, only need to adjust the specification of signal cable, all can accept at 1A-100A, guarantee that lithium battery thoroughly stops the generation overcharging.The utility model converts e-management to heat management, and the heat producing when heat-generating units reaches set point, and memory metal switch is triggered, and directly carries out open circuit protection.After heat leaves, battery is returned to normal temperature, and memory metal switch relies on its physical characteristic automatically to be recovered, and connects circuit, when again run into repeat while overcharging before work, whole process produces the measure that is interrupted protection, can effectively control temperature anomaly.
In voltage acquisition unit, be provided with no-voltage monitoring, can and charger (or controller) carry out information interaction.Under extremely abnormal, in the time there is 0v in battery core, the akinesia of traditional protection circuit; and the utility model can be informed charger (or controller), charger (or controller) carries out alarm, and stops at once charging; also to overhaul battery if needed, avoid security incident.
The euqalizing current of ampere level is the optimal euqalizing current of lithium battery, and its effect is far above traditional protection circuit.The interruption control of heat management can be played effective protection to battery overheated again, significantly promotes the useful life of battery, ensures the capacity of battery.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection range of the present utility model.
Claims (4)
1. one kind based on balanced trigger-type lithium battery physical protection device, it is characterized in that: comprise and be subject to temperature controlled break protective switch (2) and battery detecting module (3), in the loop at each lithium battery module (1) place in lithium battery, be provided with a described break protective switch (2), on each described lithium battery module (1), be provided with a described battery detecting module (3), one end of described battery detecting module (3) is connected with the both positive and negative polarity of described lithium battery module (1), the other end is connected with charger or controller (5), described battery detecting module (3) comprises that the described heat-generating units of a heat-generating units (6) (6) is fitted in a side of described break protective switch (2),
In each described battery detecting module (3), also include respectively voltage acquisition unit (4), metal-oxide-semiconductor (M), the first triode (Q1) and the second triode (Q2), described voltage acquisition unit (4) is provided with and overcharges signal output part (CO), crosses discharge signal output (DO), zero voltage signal output (0V), for connecting the anodal positive terminal (B+) of described lithium battery module (1) and negative pole end (B-) for being connected described lithium battery module (1) negative pole, the signal output part (CO) that overcharges of described voltage acquisition unit (4) is connected with the grid of described metal-oxide-semiconductor (M), the positive terminal (B+) of described voltage acquisition unit (4) is connected with the drain electrode of described metal-oxide-semiconductor (M), the negative pole end (B-) of described voltage acquisition unit (4) is connected with the source electrode of described metal-oxide-semiconductor (M) by described heat-generating units (6), the zero voltage signal output (0V) of described voltage acquisition unit (4) is connected with the base stage of described the first triode (Q1) by the first diode (D1), the discharge signal output (DO) of crossing of described voltage acquisition unit (4) is connected with the base stage of described the second triode (Q2) by the second diode (D2), the emitter of described the first triode (Q1) is connected with the emitter of described the second triode (Q2), the collector electrode of described the first triode (Q1) is connected with the collector electrode of described the second triode (Q2) with the second resistance (R2) by the first resistance (R1), the collector electrode of described first, second triode (Q1, Q2) is connected with controller or charger (5).
2. according to claim 1 based on balanced trigger-type lithium battery physical protection device, it is characterized in that: described break protective switch (2) is memory metal switch, expansion of metal formula switch or other temperature switches; Described protective switch of the short circuit (2) is made up of movable contact end (201) and stationary contact end (202), and described movable contact end (201) contacts with described stationary contact end (202).
3. according to claim 2 based on balanced trigger-type lithium battery physical protection device; it is characterized in that: described protective switch of the short circuit (2) is memory metal switch; described movable contact end (201) is made up of marmem, and described movable contact end (201) and described stationary contact end (202) top layer are silver-plated.
4. according to claim 2 based on balanced trigger-type lithium battery physical protection device, it is characterized in that: described protective switch of the short circuit (2) is expansion of metal formula switch, and described movable contact end (201) is made up of bimetal leaf.
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| CN201420416193.4U CN203983969U (en) | 2014-07-28 | 2014-07-28 | A kind of based on balanced trigger-type lithium battery physical protection device |
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| CN201420416193.4U CN203983969U (en) | 2014-07-28 | 2014-07-28 | A kind of based on balanced trigger-type lithium battery physical protection device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104092190A (en) * | 2014-07-28 | 2014-10-08 | 中投仙能科技（苏州）有限公司 | Trigger type lithium battery physical protector based on equalization |
| CN110212597A (en) * | 2019-05-05 | 2019-09-06 | 深圳市山河动力电子有限公司 | Adaptive repairing type equalizing circuit in a kind of lithium battery charging process |
-
2014
- 2014-07-28 CN CN201420416193.4U patent/CN203983969U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104092190A (en) * | 2014-07-28 | 2014-10-08 | 中投仙能科技（苏州）有限公司 | Trigger type lithium battery physical protector based on equalization |
| CN110212597A (en) * | 2019-05-05 | 2019-09-06 | 深圳市山河动力电子有限公司 | Adaptive repairing type equalizing circuit in a kind of lithium battery charging process |
| CN110212597B (en) * | 2019-05-05 | 2024-03-19 | 深圳市山河动力电子有限公司 | Self-adaptive repair type equalizing circuit in lithium battery charging process |
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