CN201000908Y - Secondary battery having current voltage protection unit - Google Patents
Secondary battery having current voltage protection unit Download PDFInfo
- Publication number
- CN201000908Y CN201000908Y CNU200720118407XU CN200720118407U CN201000908Y CN 201000908 Y CN201000908 Y CN 201000908Y CN U200720118407X U CNU200720118407X U CN U200720118407XU CN 200720118407 U CN200720118407 U CN 200720118407U CN 201000908 Y CN201000908 Y CN 201000908Y
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- battery pack
- switch
- voltage
- battery
- circuit
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
When a secondary battery works unusual, the operating circuit of the battery is cut off to ensure the safety of the battery. The utility model discloses a secondary battery with current and voltage protection device, which comprises a battery casing (1), a battery group (2), a charging circuit, a releasing circuit and a security protection device (3). The battery group (2) is arranged in the battery casing (1), and formed by a plurality of series-wounded battery unit (21), and the charging circuit, the releasing circuit and the security protection device (3) are connected with the battery group (2), the security protection device (3) comprises a voltage and current monitoring device (5) which monitors the current of the battery group (2) and controls the on off of the circuit of the battery group (2); and a secondary voltage protection device (6) which cuts off the circuit of the battery group (2) when the circuit of the battery group (2) is unusual. Comparing with the existing art, the utility model adopts multiple times voltage and current protection, the reliability is higher, meanwhile, the circuit is relatively simple, and the cost is lower.
Description
Technical field
The utility model relates to a kind of secondary cell, relates in particular to a kind of secondary cell with two-stage voltage protection.
Background technology
In order to solve the problem of environmental pollution that electrokinetic cell uses lead-acid battery to cause, many producers have adopted lithium-ion-power cell, and lithium-ion-power cell forms by multiple batteries unit serial connection.In battery charging and discharging, may cause when discharging and recharging current/voltage unusual for various reasons, tend to damage battery this moment, and serious meeting causes the accident, and damages environment and property around the battery, even near the personal safety can injuring.
Chinese patent application CN200410096556.1 name is called " overvoltage protection in the portable set " and discloses the overvoltage protection in a kind of portable set.This device comprises the excess voltage detection signal generating unit, is used to detect the overvoltage and the output over-voltage detection signal of the power that applies from external equipment; By the overvoltage interrupt location that the excess voltage detection signal of overvoltage signal generating unit is controlled, it determines whether the power that is applied should be provided for main circuit; And overvoltage and back flow current interrupt location, be used for according to the power of determining transmit or to interrupt to be applied to main circuit of the overvoltage interrupt location electric current that flows back to from battery of interruption also.But also there is following defective in this method and apparatus: the peripheral circuit more complicated that this scheme adopts, and cost is higher, and reliability is lower.
The utility model content
The technical problems to be solved in the utility model is in the secondary cell operation irregularity, to cut off the operating circuit of battery, the safety of assurance battery.
In order to realize above technical purpose; the utility model provides a kind of secondary cell with current/voltage protective device; comprise: battery case, be arranged on battery pack and the charge circuit that is connected with this battery pack, discharge loop and safety guard that the battery unit that is connected in series mutually by more piece in the battery case is formed, described safety guard comprises:
Monitor the electric current of described battery pack and control the electric current and voltage supervising device of break-make of the circuit of described battery pack; And the secondary voltage protective device that in the time of the current anomaly of described battery pack, cuts off described battery circuit.
Described charge circuit comprises with lower part series connection formation: charging port, controlled fuse, battery pack, Thermal Cutoffs and charge switch;
Described discharge loop comprises with lower part series connection formation: discharge output port, switch lock, electric current fuse, battery pack, Thermal Cutoffs, resistance and discharge switch;
Serial connection charge switch in the described batteries charging loop, discharged in series switch in the described battery power discharge loop;
Described charge switch is a gate-controlled switch, adopts metal-oxide-semiconductor IRF5305;
Described discharge switch is a gate-controlled switch, adopts metal-oxide-semiconductor IRF3205.
The integrated more piece electricity of the described employing of electric current and voltage supervising device core protection chip S8254, the input of described integrated more piece electricity core protection chip connects the both positive and negative polarity of every batteries unit in the described battery pack and the two ends of described resistance, the output control discharge switch of described integrated more piece electricity core protection chip, output control charge switch;
Described secondary voltage protective device adopts integrated more piece electricity core protection chip S8244, and the input of described integrated more piece electricity core protection chip connects every batteries unit in the battery pack, and described integrated more piece electricity core protection chip output is controlled controlled fuse;
The fusing of described controlled fuse (14) is expendable.
By above technological means, the utility model is in battery charge and discharge process, and is unusual if electric current and voltage occurs, and will cut off charging or discharge loop, guaranteed the safety of battery and surrounding enviroment.
In order further to ensure the safety of battery, described safety guard also comprises:
Be used to regulate described battery cell voltage, and the battery cell voltage bascule that the voltage of each battery unit in the described battery pack is close;
And temperature protective device, described temperature protective device comprises: device for detecting temperature is connected with temperature switch with negative temperature coefficient resister in the gap that is placed on described battery pack, and controls described charge switch and discharge switch; And Thermal Cutoffs, be connected in the described discharge loop.
Compare with prior art, the utility model has adopted repeatedly the electric current and voltage protection, and reliability is higher, and circuit is also relatively simple simultaneously, and cost is lower.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is an electrical block diagram of the present utility model;
Fig. 3 is the operating circuit schematic diagram of battery cell voltage bascule of the present utility model;
Fig. 4 is the operating circuit schematic diagram of temperature protective device of the present utility model;
Fig. 5 is the operating circuit schematic diagram of electric current and voltage supervising device of the present utility model;
Fig. 6 is the operating circuit schematic diagram of secondary voltage protective device of the present utility model;
Fig. 7 is the circuit diagram of device for monitoring temperature of the present utility model.
Embodiment
A kind of as shown in Figure 1 secondary cell comprises: battery case 1, battery pack 2 and the safety guard 3 that is connected with described battery pack 2 by connection line 8.Described battery pack 2 is connected in series by multiple batteries unit 21 and forms.By described safety guard 3, can ensure that described battery pack 2 electric current, voltage and temperature in charge and discharge process are controlled in the certain limit, and can guarantee that the voltage between the battery unit in the described battery pack 2 is in more than the identical level.
This secondary cell also comprises: dump energy indicating circuit 17, discharge output port 18, charging input end mouth 19 and switch lock 16.Can indicate the electric weight of described battery pack by described dump energy knowledge circuit 17.Described switch lock 16 is connected in the discharge loop of described battery pack 2, can disconnect or connect described charging and discharging circuit by described switch lock 16.
Secondary cell circuit as shown in Figure 2.Battery pack 2 has two loops: by the discharge loop of discharge port 18 and the charge circuit by charging port 19.Charge circuit comprises with lower part series connection formation: charging port 19, controlled fuse 14, battery pack 2, Thermal Cutoffs 78, first charge switch 91 and second charge switch 92.Discharge loop comprises with lower part series connection formation: discharge output port 18, switch lock 16, electric current fuse 15, battery pack 2, Thermal Cutoffs 78, resistance 13 and discharge switch 10.
Excessive when the discharging current of described discharge loop, when surpassing the fusing value of described electric current fuse 15, described electric current fuse 15 fuses, and described discharge loop opens circuit.
Described first charge switch 91 and second charge switch 92 and discharge switch 10 are gate-controlled switch, and its state is normally closed, and when control end was sent into signal, then switch disconnected.
Described controlled fuse 14 states are normally closed, fusing immediately after its control end is received the fusing signal, and this fusing is irrecoverable.
The safety guard 3 that is connected with described battery pack 2 by connection line comprises battery cell voltage bascule 4, electric current and voltage supervising device 5, secondary voltage protective device 6 and temperature protective device.
Described battery cell voltage bascule 4 is connected with described battery pack 2 and wherein every batteries unit item by circuit.
Described temperature protective device comprises device for monitoring temperature 7 and Thermal Cutoffs 78, and the output of device for detecting temperature 7 connects the control end of first charge switch 91 and second charge switch 92 and the control end of discharge switch 10 respectively.
The resistance 13 of connecting in the electric core of the input of described electric current and voltage supervising device 5 and battery pack 2 and the discharge loop of described battery pack 2 is connected, and output connects the control end of second charge switch 92 and the control end of discharge switch 10 by lead.By monitoring the voltage on the described resistance 13, the linear electric current that is proportional to discharge loop of this voltage.Described electric current and voltage supervising device 5 can obtain the discharging current of described discharge loop.Described electric current and voltage supervising device 5 can be sent control signal to the control end of described second charge switch 92 or the control end of discharge switch 10, cuts off described charge circuit or discharge loop.
The input of secondary voltage protective device 6 links to each other with described battery pack 2 the two poles of the earth, monitors the voltage of described battery pack 2, and output links to each other with the control end of described controlled fuse 14 by guiding.
Described charge switch is a gate-controlled switch, adopts metal-oxide-semiconductor IR48; Described discharge switch is a gate-controlled switch, adopts metal-oxide-semiconductor IRF3205.
The control end of described first charge switch 91 and second charge switch 92 and discharge switch 10 is respectively the G utmost point of described metal-oxide-semiconductor.
As shown in Figure 5, described electric current and voltage supervising device 5 adopts integrated more piece electricity core protection chip 12.
The both positive and negative polarity of every batteries unit all is connected respectively to the input of described integrated more piece electricity core protection chip 12 in the described battery pack 2 by lead; the series connection of battery pack 2 discharge loops inserts resistance 13; described resistance 13 two ends are wired to the input of integrated more piece electricity core protection chip 12, in order to detect battery pack 2 discharge loop electric currents.
The output 122 control discharge switches 10 of described integrated more piece electricity core protection chip 12, output 121 controls second charge switch 92 of described integrated more piece electricity core protection chip 12.
Any batteries cell voltage surpasses certain limit in the described battery pack 2 when described integrated more piece electricity core protection chip 12 detects, and then this chip output 121 is sent level signal, cuts off described second charge switch 92, thereby cuts off charge circuit.
Any batteries cell voltage is lower than certain limit in the described battery pack 2 when described more piece electricity core protection chip 12 detects, and then this chip output 122 is sent level signal, cuts off described discharge switch 10, thereby cuts off discharge loop.
Described integrated more piece electricity core protection chip 12 adopts S8254.
As shown in Figure 6, described secondary voltage protective device 6 adopts integrated more piece electricity core protection chip 20.Described charging port 19 and 14 series connection of controlled fuse connect battery pack 2, and the input of integrated more piece electricity core protection chip 20 is used to detect the voltage of every batteries unit by every batteries unit in the wire connected battery group 2.Described integrated more piece electricity core protection chip 20 adopts S8244.
The voltage that detects any batteries unit in the described battery pack 2 when described integrated more piece electricity core protection chip 20 surpasses certain numerical value; be that electric current and voltage supervising device 5 lost efficacy; in the time of the overtension of battery unit; described integrated more piece electricity core protection chip 20 outputs send the fusing signal for controlled fuse 14 by lead, then controlled fuse 14 fusing.14 fusing of electric current fuse are irrecoverable.
As shown in Figure 3, described battery pack 2 is connected in series by several battery units 21 and forms.Described battery unit 21 and described battery cell voltage bascule 4 are connected in parallel.Described battery unit 21 and resistance 44 and gate-controlled switch 43 are connected in series and are the loop, and the control end of described gate-controlled switch 43 is connected with the output of comparator 42.The end of just comparing of described comparator 42 links to each other with the positive pole of described battery unit 21, is the voltage of described battery unit 21; The negative sense of described comparator is relatively held with the average voltage level of all battery units of described battery pack 2 and is connected.
Described gate-controlled switch 43 is open circuit when being low level at its control end.When the voltage of described battery unit 21 is higher than the average voltage of all battery units of battery pack 2, the output of described comparator 42 sends high level for the control of gate-controlled switch 43, described gate-controlled switch 43 is connected, then described battery unit 21 discharges by described resistance 44, equals up to battery unit 21 voltages till the average voltage level of all battery units of described battery pack 2.
Described gate-controlled switch 43 can adopt metal-oxide-semiconductor, and described gate-controlled switch 43 control ends are the G utmost point of this COMS pipe.Described comparator 42 can adopt operational amplifier integrated circuit LM324.
The average voltage level of all battery units of described battery pack 2 can obtain in the following manner: described battery pack 2 is connected in series by N batteries unit 21, then can be identical with N resistance and be connected to independent loop greater than the resistance series connection of 100M ohm in described battery pack 2, then can on this single resistance, obtain the average voltage level of all battery units of described battery pack 2.
As shown in Figure 4, a kind of temperature protective device is connected in battery pack 2 charge circuits and the discharge loop, comprises device for detecting temperature 7 and Thermal Cutoffs 78.
Described device for detecting temperature 7 is connected with temperature switch 71 with negative temperature coefficient resister 72 in the gap that is placed on described battery pack 2, and controls described first charge switch 91 and second charge switch 92 and discharge switch 10.
The signal of described negative temperature coefficient resister 72 change in resistance is imported operational amplifier in the described device for detecting temperature 7 by lead, and the output of this operational amplifier connects first charge switch 91 and second charge switch, 92 control ends by lead.Described operational amplifier adopts LM358.
Described first charge switch 91 and second charge switch 92 adopt metal-oxide-semiconductor IR48, and described discharge switch 10 adopts metal-oxide-semiconductor IRF5305.
When the temperature of described negative temperature coefficient resister 72 is lower than 0 degree centigrade or when being higher than 50 degrees centigrade, described operational amplifier is sent level signal and cut off described first charge switch 91, stops the charging of described battery pack 2.
Described temperature switch 71 is a temperature memory alloy switch, and the actuating signal of described temperature switch 71 is sent into described device for detecting temperature 7.When the temperature of described battery pack 2 surpasses certain value A, the action of described temperature switch 71, this actuating signal is by described device for detecting temperature 7 described charge switch 92 of control and discharge switches 10.After the temperature in the described battery pack 2 returned to certain limit, described charge switch 92 and discharge switch 10 recovered closed.Described A value is greater than 50 degrees centigrade.
When the temperature of described battery pack 2 rises when reaching a certain temperature value B then described Thermal Cutoffs 78 fusing, the charge circuit and the discharge loop that cut off described battery pack 2.Described B value is higher than described A value.
The fusing of described Thermal Cutoffs 78 is expendable.
As shown in Figure 7, the voltage of negative temperature coefficient resister 72 will change with variation of temperature, use bridge circuit as figure can detect as described in the change in voltage of negative temperature coefficient resister 72 just can detect the variation of temperature amount.The voltage of negative temperature coefficient resister 72 connects the negative input of operational amplifier 76 and the positive input of operational amplifier 77.The positive input of the voltage input operational amplifier 76 of resistance 74, the negative input of the voltage input operational amplifier 77 of resistance 75, the voltage with temperature coefficient of resistance 72 compares respectively.The output of operational amplifier 76 outputs and operational amplifier 77 is by the closed and disconnected of voltage transitions 79 controls first charge switch 91.
Described voltage transitions 79 can be according to the difference of the voltage of importing, output height or low level, and in the present embodiment, high level turn off charge switch (91), low level make charge switch (91) closure.
Described negative temperature coefficient resister 72 is in 0 to 50 degree centigrade of scope the time, and voltage is higher than institute's component voltage on the described resistance 75 on the described negative temperature coefficient resister 72, also is lower than institute's component voltage on the described resistance 74.At this moment, 77 outputs of described operational amplifier 76 and operational amplifier are sent to the control end of described charge switch 91 by this level signal by described voltage transitions 79, and charge circuit is communicated with.
When the temperature of described negative temperature coefficient resister 72 is lower than certain certain value, voltage on the described negative temperature coefficient resister 72 is higher than voltage on the described resistance 74, described operational amplifier 76 output low level signals, then described voltage transitions 79 output high level, cut off described charge switch 91, the charge circuit open circuit.When the temperature of described temperature coefficient of resistance 72 surpasses certain certain value, voltage on the described negative temperature coefficient resister 72 is lower than voltage on the described resistance 75, described operational amplifier 77 output low level signals, this level signal is cut off described charge switch 91 by described voltage transitions 79, the charge circuit open circuit.
Claims (7)
1, a kind of secondary cell with current/voltage protective device; comprise: battery case (1), be arranged on battery pack (2) that the battery unit (21) that is connected in series mutually by more piece in the battery case (1) formed and charge circuit, discharge loop and the safety guard (3) that is connected with this battery pack (2), it is characterized in that described safety guard (3) comprising:
Monitor the electric current of described battery pack (2) and control the electric current and voltage supervising device (5) of described battery pack (2) connecting and disconnecting of the circuit and the secondary voltage protective device (6) that when the current anomaly of described battery pack (2), cuts off described battery pack (2) circuit.
2, secondary cell according to claim 1 is characterized in that:
Described electric current and voltage supervising device (5) contains integrated more piece electricity core protection chip (12); the input of this integrated more piece electricity core protection chip (12) connects the two ends of the both positive and negative polarity and the described resistance (13) of every batteries unit (21) in the described battery pack (2); output (122) the control discharge switch (10) of described integrated more piece electricity core protection chip (12), its second output (121) control, first charge switch (91).
3, secondary cell according to claim 2 is characterized in that:
Described secondary voltage protective device (6) contains integrated more piece electricity core protection chip (20); the input of described integrated more piece electricity core protection chip (20) connects every batteries unit in the battery pack (2), and described integrated more piece electricity core protection chip (20) output is controlled controlled fuse (14).
4, secondary cell according to claim 3 is characterized in that: described integrated more piece electricity core protection chip (20) adopts S8244; Described integrated more piece electricity core protection chip (12) adopts S8254.
5, secondary cell according to claim 3 is characterized in that: the fusing of described controlled fuse (14) is expendable.
6,, it is characterized in that described safety guard (3) also comprises according to claim 1 or 3 described secondary cells:
Be used to regulate described battery unit (21) voltage, and the battery cell voltage bascule (4) that the voltage of each battery unit (21) in the described battery pack (2) is close;
And temperature protective device, described temperature protective device comprises: device for detecting temperature (7), be connected with temperature switch (71) with the negative temperature coefficient resister (72) in the gap that is placed on described battery pack (2), and control described first charge switch (91) and second charge switch (92) and discharge switch (10); And Thermal Cutoffs (78), be connected in the described discharge loop.
7, according to claim 1 or 3 described secondary cells, it is characterized in that described charge circuit comprises with lower part series connection formation: charging port (19), controlled fuse (14), battery pack (2), Thermal Cutoffs (78) and first charge switch (91) and second charge switch (92);
Described discharge loop comprises with lower part series connection formation: discharge output port (18), switch lock (16), electric current fuse (15), battery pack (2), Thermal Cutoffs (78), resistance (13) and discharge switch (10);
Series connection first charge switch (91) and second charge switch (92) in described battery pack (2) charge circuit, discharged in series switch (10) in described battery pack (2) discharge loop;
Described first charge switch (91) and second charge switch (92) are gate-controlled switch, adopt metal-oxide-semiconductor IRF5305;
Described discharge switch (10) is a gate-controlled switch, adopts metal-oxide-semiconductor IRF3205.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720118407XU CN201000908Y (en) | 2007-01-30 | 2007-01-30 | Secondary battery having current voltage protection unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720118407XU CN201000908Y (en) | 2007-01-30 | 2007-01-30 | Secondary battery having current voltage protection unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201000908Y true CN201000908Y (en) | 2008-01-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200720118407XU Expired - Lifetime CN201000908Y (en) | 2007-01-30 | 2007-01-30 | Secondary battery having current voltage protection unit |
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| CN (1) | CN201000908Y (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102208696A (en) * | 2011-04-28 | 2011-10-05 | 常州格力博工具有限公司 | High-capacity lithium battery pack |
| CN102299276A (en) * | 2010-06-23 | 2011-12-28 | 电能有限公司 | Assembled battery |
| CN103166274A (en) * | 2011-12-15 | 2013-06-19 | 东莞钜威新能源有限公司 | Battery management system and corresponding electronic system |
| CN103985834A (en) * | 2014-05-28 | 2014-08-13 | 中投仙能科技（苏州）有限公司 | Lithium battery module based on metal expansion memory switch protector |
| CN104051700A (en) * | 2014-07-07 | 2014-09-17 | 中投仙能科技（苏州）有限公司 | Stacking-type lithium battery system |
| CN104578239A (en) * | 2014-10-20 | 2015-04-29 | 丘映莹 | Charge/discharge protection circuit of dual-redundancy lithium battery |
| CN106208218A (en) * | 2016-08-09 | 2016-12-07 | 安顺学院 | A kind of charging and discharging lithium battery bascule |
| CN107305935A (en) * | 2016-04-19 | 2017-10-31 | 罗伯特·博世有限公司 | Housing for the energy storage device of electrochemistry |
| CN108258183A (en) * | 2016-12-19 | 2018-07-06 | Sk新技术株式会社 | Cell safety equipment |
-
2007
- 2007-01-30 CN CNU200720118407XU patent/CN201000908Y/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102299276A (en) * | 2010-06-23 | 2011-12-28 | 电能有限公司 | Assembled battery |
| CN102299276B (en) * | 2010-06-23 | 2014-04-02 | 电能有限公司 | Assembled battery |
| CN102208696A (en) * | 2011-04-28 | 2011-10-05 | 常州格力博工具有限公司 | High-capacity lithium battery pack |
| CN103166274A (en) * | 2011-12-15 | 2013-06-19 | 东莞钜威新能源有限公司 | Battery management system and corresponding electronic system |
| CN103985834A (en) * | 2014-05-28 | 2014-08-13 | 中投仙能科技（苏州）有限公司 | Lithium battery module based on metal expansion memory switch protector |
| CN104051700A (en) * | 2014-07-07 | 2014-09-17 | 中投仙能科技（苏州）有限公司 | Stacking-type lithium battery system |
| CN104578239A (en) * | 2014-10-20 | 2015-04-29 | 丘映莹 | Charge/discharge protection circuit of dual-redundancy lithium battery |
| CN107305935A (en) * | 2016-04-19 | 2017-10-31 | 罗伯特·博世有限公司 | Housing for the energy storage device of electrochemistry |
| CN106208218A (en) * | 2016-08-09 | 2016-12-07 | 安顺学院 | A kind of charging and discharging lithium battery bascule |
| CN108258183A (en) * | 2016-12-19 | 2018-07-06 | Sk新技术株式会社 | Cell safety equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080102 |