CN102299509A - Improved battery protection circuit with a plurality of serially connected battery units and system - Google Patents
Improved battery protection circuit with a plurality of serially connected battery units and system Download PDFInfo
- Publication number
- CN102299509A CN102299509A CN2011102636893A CN201110263689A CN102299509A CN 102299509 A CN102299509 A CN 102299509A CN 2011102636893 A CN2011102636893 A CN 2011102636893A CN 201110263689 A CN201110263689 A CN 201110263689A CN 102299509 A CN102299509 A CN 102299509A
- Authority
- CN
- China
- Prior art keywords
- display unit
- battery
- circuit
- battery unit
- output
- 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.)
- Pending
Links
Images
Abstract
The invention provides an improved battery protection circuit with a plurality of serially connected battery units and a battery protection circuit system. The battery protection circuit comprises a plurality of protection units for detecting the corresponding battery unit to output a first signal which indicates whether the corresponding battery unit is abnormal or not, and a plurality of transmission display units corresponding to the protection units, wherein each transmission display unit receives the first signal output by the corresponding protection unit and a second signal output by a previous-stage transmission display unit, outputs the second signal indicating abnormality as long as one of the received first signal and second signal is abnormal, and comprises a display circuit for indicating whether the second signal output by the transmission display unit is abnormal or not. Therefore, an abnormal signal is transmitted upwards or downwards when any one section of battery unit is abnormal, so that a plurality of sections of serially connected battery units can be protected; in addition, the specific battery unit which is abnormal can be known according to the indication of the display unit.
Description
[technical field]
The present invention relates to a kind of electric power management circuit, particularly relate to a kind of battery protecting circuit and system of multiple batteries units in series.
[background technology]
Lithium ion battery because have energy height, cell voltage height, advantage such as operating temperature range is wide, storage life is long, be widely used in the military and civilian compact electric apparatus, as mobile phone, portable computer, video camera, camera etc., part has replaced conventional batteries.But because of its physical characteristic, in use, lithium battery is very strict to charging current, discharging current, voltage and temperature requirement, will produce serious consequence on the safety He on the life-span in case surpass.Therefore, lithium ion battery need be pressed its overcharged voltage, overdischarge, key parameters such as charging restriction electric current and discharge restriction electric current monitor and control in discharging and recharging the course of work, to prevent the safety of battery excessive loss in guaranteeing simultaneously to use.At present the protective circuit of single lithium battery is very ripe, but for the lithium battery group of multi-section serial, and the protective circuit of setting up with its coupling has certain degree of difficulty.The battery of accurately protecting for the needs of other types also needs to be provided with protective circuit protection.
Fig. 1 shows a kind of circuit diagram of battery protection system 100 of existing multiple batteries units in series.Please refer to shown in Figure 1ly, described battery protection system 100 comprises four batteries unit B 1, B2, B3 and B4, the battery protecting circuit 110 of series connection and is connected in the negative pole of battery unit B1 and the switch combination circuit 120 between the cathode output end U-.Described battery protecting circuit 110 comprises four protected locations 111 and the testing circuit 112 that is connected to corresponding battery unit positive and negative end.Whether described protected location 111 detects corresponding battery unit unusual, is unusually such as overcharge or overdischarge etc., and all the other be normal or non-unusual, and the output battery unit anomalous signals whether of representing correspondence.In the signal of described each protected location 111 outputs of testing circuit 112 detections whether abnormal signal is arranged, be not damaged with protection series connected battery unit if abnormal signal is arranged then control described switch combination circuit 120 cut-out charge or discharge loops.
Though being, the output of each protected location 111 whether represents anomalous signals; such as high level represent unusually, low level represents normally; but the current potential of the signal of each protected location 111 outputs is different; such as the high level of protected location 1 output and the current potential of the high level of protected location 2 outputs is different, and the low level of protected location 3 outputs is different with the low level current potential of protected location 4 outputs.In addition, along with increasing of series-connected cell, the design of described testing circuit 112 can become increasingly complex, and its voltage that need tolerate also can be more and more higher.Therefore, the battery protecting circuit of existing multiple batteries units in series generally all can only save series-connected cell protection at 4-6.
Therefore, be necessary to propose a kind of improved technical scheme and solve the problems referred to above.
[summary of the invention]
One of purpose of the present invention is to provide a kind of battery protecting circuit, and it can realize the protection of multiple batteries units in series.
Two of purpose of the present invention is to provide a kind of battery protection system, and it can realize the protection of multiple batteries units in series.
To achieve these goals, according to an aspect of the present invention, the present invention proposes a kind of battery protecting circuit of multiple batteries units in series, it comprises: a plurality of protected locations, the corresponding battery unit of each protected location, whether unusual described protected location detect with this corresponding battery unit of output expression first signal the battery unit of correspondence; A plurality of transmission display units; each transmits display unit corresponding to a protected location and to battery unit that should the protected location correspondence; first signal and upper level that described transmission display unit receives corresponding protected location output transmit the secondary signal of display unit output; as long as and in first signal that receives and secondary signal, have a unusual secondary signal of output expression when unusual, wherein said transmission display unit to include to be used to a whether unusual display circuit of secondary signal of indicating its output.
Further, the battery unit that final stage is transmitted the display unit correspondence is the battery unit that has the battery unit of maximum potential in the series connected battery unit or have potential minimum, and the battery unit of a transmission display unit correspondence transmits between the battery unit of display unit correspondence and the battery unit that next stage transmits the display unit correspondence and adjacent with them at upper level.
Further, the reference potential of the secondary signal of described transmission display unit output is the current potential of its corresponding battery unit, and the reference potential of first signal of described protected location output is the current potential of its corresponding battery unit.Described transmission display unit also comprises the change-over circuit with an input and an output and has the logical circuit of two inputs and an output.The input of described change-over circuit receives the secondary signal that described upper level transmits display unit output, and the reference potential that described upper level is transmitted the secondary signal of the display unit output current potential that transmits the battery unit of display unit correspondence by upper level is converted to the current potential of the battery unit of the transmission display unit correspondence under it, and the secondary signal after the reference potential conversion passed to an input of described logical circuit.Another input of described logical circuit receives first signal of corresponding protective circuit output; its output is as the output of described transmission display unit; in first signal of its reception and secondary signal, there is one when unusual, then the secondary signal of output abnormality.Described display circuit includes light-emitting diode, described light-emitting diode bright and secretly indicate the whether unusual of described secondary signal.
Further; described protected location is by its corresponding battery unit power supply; described logical block is by the battery unit power supply of the transmission display unit correspondence under it; described display circuit is by the power supply of the battery unit of the transmission display unit correspondence under it, and described change-over circuit is by the battery unit power supply of the transmission display unit correspondence of the battery unit of the transmission display unit correspondence under it and upper level.
Further again, described display circuit also includes switching device, described switching device is series between the negative pole and positive pole of the corresponding battery unit of affiliated transmission display unit with described light-emitting diode, and the control end of described switching device is controlled by described secondary signal.
Further again, described change-over circuit comprises current source between the negative or positive electrode of battery unit of transmission display unit correspondence of the negative pole of the battery unit that is connected on the transmission display unit correspondence under it or positive pole and upper level and switching circuit and by the inverter of the battery unit power supply of the transmission display unit correspondence under it, the control end of described switching circuit is as the input of described change-over circuit, the described current source of input termination of described inverter and the intermediate node of described switching circuit, the output of described inverter is as the output of described change-over circuit.Described switching circuit is nmos pass transistor or PMOS transistor.When described switching circuit was no abnormal in the secondary signal of its reception, it was in conducting state, and when its secondary signal that receives was unusual for having, it was in by state.
According to another aspect of the present invention, the present invention proposes a kind of battery protecting circuit system, and it comprises: the battery unit of multi-section serial; A plurality of protected locations, the corresponding battery unit of each protected location, whether unusual described protected location detect with this corresponding battery unit of output expression first signal the battery unit of correspondence; A plurality of transmission display units; each transmits display unit corresponding to a protected location and to battery unit that should the protected location correspondence; first signal and upper level that described transmission display unit receives corresponding protected location output transmit the secondary signal of display unit output; as long as and in first signal that receives and secondary signal, have a unusual secondary signal of output expression when unusual, wherein said transmission display unit to include to be used to a whether unusual display circuit of secondary signal of indicating its output.
Further, described battery protecting circuit system also comprises: the switch combination circuit, cut off the charge or discharge loop when its secondary signal of transmitting display unit output in final stage is unusual.
Compared with prior art; the battery protecting circuit that the present invention proposes; whether unusual by each batteries unit being detected to determine this batteries unit; when then this abnormal signal is transmitted up or down when unusual appears in arbitrary batteries unit, can realize like this battery unit of multi-section serial is protected.In addition, can learn it specifically is which battery unit occurs unusually according to the indication of display circuit.
[description of drawings]
In order to be illustrated more clearly in the technical scheme of the embodiment of the invention, the accompanying drawing of required use is done to introduce simply in will describing embodiment below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.Wherein:
Fig. 1 is the schematic diagram of the battery protecting circuit system of multiple batteries units in series in the prior art;
Fig. 2 is the battery protecting circuit system circuit diagram in one embodiment of multiple batteries units in series among the present invention;
Fig. 3 is the transmission display unit circuit diagram in one embodiment among Fig. 2;
Fig. 4 is the battery protecting circuit system circuit diagram in another embodiment of multiple batteries units in series among the present invention; With
Fig. 5 is the transmission display unit circuit diagram in one embodiment among Fig. 4.
[embodiment]
Detailed description of the present invention is mainly come the running of direct or indirect simulation technical solution of the present invention by program, step, logical block, process or other symbolistic descriptions.Be the thorough the present invention that understands, in ensuing description, stated a lot of specific detail.And when not having these specific detail, the present invention then may still can realize.Affiliated those of skill in the art use these descriptions herein and state that the others skilled in the art in affiliated field effectively introduce their work essence.In other words, be the purpose of the present invention of avoiding confusion, because the understanding easily of method of knowing and program, so they are not described in detail.
Alleged herein " embodiment " or " embodiment " are meant special characteristic, structure or the characteristic that can be contained at least one implementation of the present invention.Different in this manual local " in one embodiment " that occur not are all to refer to same embodiment, neither be independent or optionally mutually exclusive with other embodiment embodiment.In addition, represent the sequence of modules in method, flow chart or the functional block diagram of one or more embodiment and revocablely refer to any particular order, also be not construed as limiting the invention.N can be for greater than 2 natural number herein, a plurality of expressions two or more.Connection in the literary composition, join, speech such as series connection all can be understood as indirectly or directly and connects, joins, connects.
Fig. 2 is battery protecting circuit system 200 circuit diagram in one embodiment of multiple batteries units in series among the present invention.Described battery protecting circuit system 200 comprise n series connected battery unit B 1, B2 ..., Bn, battery protecting circuit 210 that n battery unit protected and the switch combination circuit 220 between negative pole that is connected in battery unit B1 and the cathode output end U-.
Any one described switch combination circuit 220 occurs then controlling when unusual and cuts off the charge or discharge loops and be not damaged with protection series connected battery unit described battery protecting circuit 210 in detecting n battery unit.Please refer to shown in Figure 2ly, described battery protecting circuit 210 comprises n protected location (or claim protective circuit) 211, a n-1 transmission display unit 212 and control circuit 213.N protected location 211 be respectively protected location 1, protected location 2 ..., protected location n-1 and protected location n; n-1 transmission display unit 212 be respectively transmit display unit 2 ..., transmit display unit n-1 and transmit display unit n; wherein protected location n transmits display unit n corresponding to protected location n and battery unit Bn corresponding to battery unit Bn.
Whether unusual the battery unit of 211 pairs of correspondences of each protected location detect with this corresponding battery unit of output expression first signal, and described can be to overcharge or overdischarge unusually.First signal and upper level that described transmission display unit 212 receives 211 outputs of corresponding protected location transmit the secondary signal of display unit 212 outputs; and whether the output expression has unusual secondary signal; as long as wherein said transmission display unit 212 has one when unusual in first signal that receives and secondary signal, then the secondary signal of output abnormality.The secondary signal of transmission display unit 212 outputs can represent whether the battery unit of this transmission display unit correspondence and series connected battery unit, front have unusually, and is unusual for unusually then representing to have a battery unit among the battery unit B1 to Bn-1 at least such as the secondary signal of transmitting display unit n-1 output.In addition, whether unusual wherein said transmission display unit 212 include secondary signal the display circuit that is used to indicate its output.
In the present embodiment, secondary signal is transmitted to the transmission display unit of the battery unit of corresponding high potential by the transmission display unit of the battery unit of corresponding electronegative potential, therefore the battery unit of final stage transmission display unit 212 correspondences is the battery unit that has maximum potential in the series connected battery unit, such as transmitting display unit n is that final stage is transmitted display unit, battery unit Bn is the battery unit with maximum potential, and the transfer mode of this kind signal can upwards be transmitted by simple appellation.It is the transmission display unit of exporting to this transmission display unit secondary signal that the upper level of a transmission display unit 212 transmits display unit, the next stage of a transmission display unit transmits display unit for receiving the transmission display unit that this transmits the secondary signal of display unit output, transmit display unit for transmitting display unit n such as the next stage that transmits display unit n-1, the upper level that transmits display unit n-1 transmits display unit for transmitting display unit n-2.Obviously, the battery unit of a transmission display unit correspondence transmits between the battery unit of display unit correspondence and the battery unit that next stage transmits the display unit correspondence and adjacent with them at upper level.
Need to prove that in the present embodiment, the display unit output of secondary signal transmit to(for) last one of elementary transmission display unit 2 its receptions is exactly in fact first signal of protective circuit 1 output.Owing to do not had the series connected battery unit below the battery unit B1, thus first signal of protective circuit 1 output whether whether unusual battery unit B1 and the battery unit before (nothing) just represented own has unusually, promptly the implication of representing with secondary signal is identical.Therefore, first signal of the first segment battery unit corresponding protective circuit output here can be considered to the upper level that the transmission display unit 2 of the second batteries unit correspondence receives and transmits the secondary signal of display unit output.
In another embodiment; can and transmit between the display unit 2 in protective circuit 1 a transmission display unit 1 can also be set; first signal and perseverance that this transmission display unit 1 receives protective circuit 1 output are non-unusual secondary signal (owing to no series connected battery unit under the battery unit B1), and whether the output expression has unusual secondary signal to give transmission display unit 2.
Like this, any batteries unit unusual all can making progress by the transmission display unit of its correspondence occur and transmits, and finally cause the secondary signal of final stage transmission display unit n output to show as unusually, whether only directly just can judge by the secondary signal of final stage transmission display unit n output has the battery unit appearance unusual.There is being battery unit to occur when unusual, then cutting off the charge or discharge loops and be not damaged with protection series connected battery unit by the described switch combination circuit 220 of control circuit 213 controls.Increase along with battery unit series connection joint number; circuit only need increase corresponding transmission display unit 212 and get final product; therefore can realize comparatively easily the multiple batteries unit is protected, and the joint number of series connected battery unit can reach tens, even tens.
In addition, whether the display circuit of described transmission display unit can show so that the user observes unusually to the secondary signal of oneself exporting, in case there is the display circuit of a transmission display unit to show that the secondary signal of its output is for unusual, the display circuit of the transmission display unit of its back all can display abnormality, so just can know that specifically to be which battery unit occurs unusual.
Fig. 3 is the circuit diagram of transmission display unit n in an embodiment 300 among Fig. 2, and all the other transmit display units and also can join with transmitting the such circuit structure of display unit 300.Described transmission display unit 300 comprises the change-over circuit 310 with an input and an output, the logical circuit 320 with two inputs and an output and a display circuit 330.In conjunction with reference to shown in figure 2 and 3, each protected location 211 provides power supply such as protected location 2 by its corresponding battery unit B2 by its corresponding battery unit power supply.Described logical block 320 is by the battery unit power supply of the transmission display unit correspondence under it, provide power supply such as the logical block 320 of transmitting display unit n by its corresponding battery unit Bn, concrete, the anodal Bn+ of one termination battery unit Bn of logical block 320, the negative pole Bn-of another termination battery unit Bn.Described display circuit 330 is by the battery unit power supply of the transmission display unit correspondence under it, provide power supply such as the display unit 320 that transmits display unit n by its corresponding battery unit Bn, concrete, the anodal Bn+ of one termination battery unit Bn of display unit 320, the negative pole Bn-of another termination battery unit Bn.Described change-over circuit 310 is by the battery unit power supply of the transmission display unit correspondence of the battery unit of the transmission display unit correspondence under it and upper level, provide power supply such as the change-over circuit that transmits display unit n jointly by the battery unit Bn-1 of the transmission display unit correspondence of its corresponding battery unit Bn and upper level, concrete, the anodal Bn+ of one termination battery unit Bn of the power supply of change-over circuit, the negative pole Bn-1-of another termination battery unit Bn-1.
The output of described logical block 320 is as the output output secondary signal of transmitting display unit under it.Like this, the reference potential of the secondary signal of described logical block 320 outputs is the current potential of its corresponding battery unit, such as the current potential of the secondary signal of the logical block output of transmitting display unit n between the both positive and negative polarity current potential of battery unit Bn, be described logical block 320 with the both positive and negative polarity current potential of battery unit Bn be that reference potential generates described secondary signal, concrete, the high level of secondary signal can be the anodal current potential of battery unit Bn, and the low level of secondary signal can be the negative pole current potential of battery unit Bn.The reference potential of first signal of described protected location 211 outputs is the current potential of its corresponding battery unit; high level such as first signal of protected location n output can be the anodal current potential of battery unit Bn, and low level can be the negative pole current potential of battery unit Bn.
Described display circuit 330 includes Light-Emitting Diode (also can be referred to as indicator light) and switching device, between the negative pole and positive pole of the battery unit that the transmission display unit that described switching device and described light-emitting diode are direct or indirect under being series at is corresponding, the control end of described switching device is by the secondary signal control of the output output of described logical block 320, the bright of described light-emitting diode shown the whether unusual of described secondary signal with inferring, such as can be unusual, also can indicate unusual with not working with bright indication.
The input 302 of described change-over circuit 310 receives the secondary signal that described upper level transmits display unit output, and the reference potential that described upper level is transmitted the secondary signal of the display unit output current potential that transmits the battery unit of display unit correspondence by upper level is converted to the current potential of the battery unit of the transmission display unit correspondence under it, and the secondary signal after the reference potential conversion passed to an input of described logical circuit 320.What for instance, transmit that change-over circuit 310 among the display unit n receives it be that the secondary signal of reference potential converts to battery unit Bn with battery unit Bn-1 is the secondary signal of reference potential.Another input 301 of described logical circuit 320 receives first signal of corresponding protected location output; and carry out logic determines according to reference potential identical first signal and secondary signal; as long as when having one to be unusual in first signal and secondary signal, described logical circuit 320 is by the secondary signal of output 303 output abnormalities.
Like this, because transmitting display unit 300 is connected between the two adjacent batteries unit, therefore the requirement of withstand voltage that transmits display unit 300 also can be lower, and along with the increase of the number of battery unit series connection, also do not need to increase the voltage endurance capability that each transmits display unit.
Please continue with reference to shown in Figure 3, described change-over circuit 310 comprises current source Is between the negative pole (such as Bn-1-) of battery unit of transmission display unit correspondence of the positive pole (such as Bn+) of the battery unit that is connected on the transmission display unit correspondence under it and upper level and switching circuit 311 and the inverter INV that is powered by the battery unit of the transmission display unit correspondence under it, the control end of described switching circuit 311 is as the input 302 of described change-over circuit 310, the intermediate node of described current source Is of the input termination of described inverter INV and described switching circuit 311, the output of described inverter INV is as the output of described change-over circuit 310.Among the figure, one of current source Is connects termination Bn+, and one of switching circuit connects termination Bn-1-.Described switching circuit 311 can be switching transistor, such as NMOS (N-type Metal Oxide Semiconductor) or PMOS (P-type Metal Oxide Semiconductor) transistor, transistorized grid is the control end of described switching circuit 311.
In a preferred embodiment, when described switching circuit 311 was no abnormal in the secondary signal of its reception, it was in conducting state, and when its secondary signal that receives was unusual for having, it was in by state.Like this since other circuit of battery protecting circuit 210 unusually also can start battery protection, broken down such as the reason of switching circuit 311 owing to itself, equally also abnormal signal can be reported up, make battery protection safer like this.
In a specific embodiment; in conjunction with reference to shown in figure 2 and 3; if described switching circuit 311 is a nmos pass transistor; be unusual during the first signal low level; the secondary signal low level is unusual; the bright expression of the indicator light of display circuit is unusual; if each battery unit is all normal; then each protective circuit is all exported high level; the nmos pass transistor conducting of transmitting in the display unit 2 makes change-over circuit export high level, and logical circuit also will be exported high level, next transmits display unit 3; 4 all can export high level until n; each indicator light that transmits the display circuit of display unit all is dark, and this shows does not have battery unit to occur unusually.If battery unit 1 has occurred unusually; protective circuit 1 output low level; nmos pass transistor is by making the change-over circuit output low level in the transmission display unit 2; logical circuit also will output low level; the indicator light of its display circuit will brighten; next transmitting display unit 3,4 all can output low level until n, and the indicator light of their display circuit all can brighten, and this shows has battery unit 1 to occur unusually.All the other battery units occur unusual, also can cause the transmission display unit and the subordinate of its correspondence to transmit the display unit output low level, the indicator light that occurs the display circuit of the indicator light of display circuit of transmission display unit of unusual battery unit correspondence and transmission display unit afterwards simultaneously all can brighten, and specifically is which battery has occurred unusually with indication.So just realized upwards transmitting and demonstration of abnormal signal.
Fig. 4 is battery protecting circuit system 400 circuit diagram in one embodiment of multiple batteries units in series among the present invention.Described battery protecting circuit system 400 comprise n series connected battery unit B 1, B2 ..., Bn, battery protecting circuit 410 that n battery unit protected and the switch combination circuit 420 between negative pole that is connected in battery unit B1 and the cathode output end U-.Described battery protecting circuit 410 comprises n protected location (or claiming protective circuit) 411, a n-1 transmission display unit 412 and control circuit 413.The difference of the battery protecting circuit system 200 among the battery protecting circuit system 400 among Fig. 4 and Fig. 2 is: 1) to transmit the corresponding battery unit Bn of display unit n be the battery unit that has potential minimum in the series connected battery unit to the final stage among Fig. 4, and the transfer mode of this kind signal can be transmitted downwards by simple appellation; 2) battery unit of the maximum potential among Fig. 4 is B1, and the battery unit of potential minimum is Bn.About protected location 411, transmit display unit 412 and control circuit 413 operation principle and embodiment shown in Fig. 2 in the operation principle of corresponding module identical, specifically can consult counterpart.
Fig. 5 is the circuit diagram of transmission display unit n in an embodiment 500 among Fig. 4, and all the other transmit display units and also can join with transmitting the such circuit structure of display unit 500.Described transmission display unit 500 comprises the change-over circuit 510 with an input and an output, the logical circuit 520 with two inputs and an output and a display circuit 530.The difference of transmission display unit n among transmission display unit n among Fig. 5 and Fig. 3 is: 1) the current source Is of the change-over circuit among Fig. 5 510 and switching circuit are connected between the positive pole of the corresponding battery unit of the transmission display unit of the negative pole of the corresponding battery unit of transmission display unit under it and upper level; 2) battery unit of the high potential among Fig. 5 is Bn-1, and the battery unit of electronegative potential is Bn.Operation principle about the corresponding module among the operation principle of change-over circuit 510, logical circuit 520 and display circuit 530 and the embodiment shown in Fig. 3 is identical, specifically can consult counterpart.
Same; in another embodiment; also can and transmit between the display unit 2 a transmission display unit 1 can also be set in protective circuit 1; this first signal and perseverance of transmitting 1 output of display unit 1 reception protective circuit is non-unusual secondary signal (owing to battery unit B1 goes up no series connected battery unit), and whether export expression has unusual secondary signal to give transmission display unit 2.
In a specific embodiment; in conjunction with reference to shown in the Figure 4 and 5; if switching circuit is the PMOS transistor; be unusual during the first signal high level; the secondary signal high level is unusual; the bright expression of the indicator light of display circuit is unusual; if each battery unit is all normal; the equal output low level of each protective circuit then; transmit the change-over circuit output low level in the display unit 2, logical circuit also will output low level, transmits display unit 3 like this; 4 all can output low level until n; each indicator light that transmits the display circuit of display unit all is dark, and this shows does not have battery unit to occur unusually.If battery unit 1 has occurred unusually; protective circuit 1 output high level; transmit the change-over circuit output high level in the display unit 2; logical circuit also will be exported high level; the indicator light of its display circuit will brighten; transmit display unit 3,4 like this and all can export high level until n, the indicator light of their display circuit all can brighten, and this shows that battery unit 1 has occurred unusually.All the other battery units occur unusual, also can cause the transmission display unit and the subordinate of its correspondence to transmit display unit output high level, the indicator light that occurs the display circuit of the indicator light of display circuit of transmission display unit of unusual battery unit correspondence and transmission display unit afterwards simultaneously all can brighten, with indication specifically is which battery has occurred unusually, has so just realized the downward transmission and the demonstration of abnormal signal.
In one embodiment, also make progress transmission and displaying scheme and downward transmission and displaying scheme shown in Figure 4 shown in Figure 2 can be applied in the same application, can realize safer protection to the series connected battery group like this.
Above-mentioned explanation has fully disclosed the specific embodiment of the present invention.It is pointed out that and be familiar with the scope that any change that the person skilled in art does the specific embodiment of the present invention does not all break away from claims of the present invention.Correspondingly, the scope of claim of the present invention also is not limited only to previous embodiment.
Claims (10)
1. the battery protecting circuit of a multiple batteries units in series is characterized in that, it comprises:
A plurality of protected locations, the corresponding battery unit of each protected location, whether unusual described protected location detect with this corresponding battery unit of output expression first signal the battery unit of correspondence,
A plurality of transmission display units; each transmits display unit corresponding to a protected location and to battery unit that should the protected location correspondence; first signal and upper level that described transmission display unit receives corresponding protected location output transmit the secondary signal of display unit output; as long as and a unusual secondary signal of output expression when unusual arranged in first signal that receives and secondary signal
Whether unusual wherein said transmission display unit include secondary signal the display circuit that is used to indicate its output.
2. battery protecting circuit according to claim 1; it is characterized in that: the battery unit that final stage is transmitted the display unit correspondence is the battery unit that has the battery unit of maximum potential in the series connected battery unit or have potential minimum, and the battery unit of a transmission display unit correspondence transmits between the battery unit of display unit correspondence and the battery unit that next stage transmits the display unit correspondence and adjacent with them at upper level.
3. according to the arbitrary described battery protecting circuit of claim 1-2; it is characterized in that: the reference potential of the secondary signal of described transmission display unit output is the current potential of its corresponding battery unit; the reference potential of first signal of described protected location output is the current potential of its corresponding battery unit
Described transmission display unit also comprises change-over circuit with an input and an output and the logical circuit with two inputs and an output,
The input of described change-over circuit receives the secondary signal that described upper level transmits display unit output, and the reference potential that described upper level is transmitted the secondary signal of the display unit output current potential that transmits the battery unit of display unit correspondence by upper level is converted to the current potential of the battery unit of the transmission display unit correspondence under it, and the secondary signal after the reference potential conversion is passed to an input of described logical circuit
Another input of described logical circuit receives first signal of corresponding protective circuit output; its output is as the output of described transmission display unit; in first signal of its reception and secondary signal, there is one when unusual, then the secondary signal of output abnormality
Described display circuit includes light-emitting diode, described light-emitting diode bright and secretly indicate the whether unusual of described secondary signal.
4. battery protecting circuit according to claim 3; it is characterized in that: described protected location is by its corresponding battery unit power supply; described logical block is by the battery unit power supply of the transmission display unit correspondence under it; described display circuit is by the power supply of the battery unit of the transmission display unit correspondence under it, and described change-over circuit is by the battery unit power supply of the transmission display unit correspondence of the battery unit of the transmission display unit correspondence under it and upper level.
5. battery protecting circuit according to claim 4; it is characterized in that: described display circuit also includes switching device; described switching device is series between the negative pole and positive pole of the corresponding battery unit of affiliated transmission display unit with described light-emitting diode, and the control end of described switching device is controlled by described secondary signal.
6. battery protecting circuit according to claim 4; it is characterized in that: described change-over circuit comprises current source between the negative or positive electrode of battery unit of transmission display unit correspondence of the negative pole of the battery unit that is connected on the transmission display unit correspondence under it or positive pole and upper level and switching circuit and by the inverter of the battery unit power supply of the transmission display unit correspondence under it; the control end of described switching circuit is as the input of described change-over circuit; the described current source of input termination of described inverter and the intermediate node of described switching circuit, the output of described inverter is as the output of described change-over circuit.
7. battery protecting circuit according to claim 6 is characterized in that: described switching circuit is nmos pass transistor or PMOS transistor.
8. battery protecting circuit according to claim 6 is characterized in that: when described switching circuit was no abnormal in the secondary signal of its reception, it was in conducting state, and when its secondary signal that receives was unusual for having, it was in by state.
9. battery protecting circuit system is characterized in that it comprises:
The battery unit of multi-section serial;
As claim 1-8 arbitrary as described in battery protecting circuit.
10. battery protecting circuit according to claim 9 system is characterized in that it also comprises:
The switch combination circuit cuts off the charge or discharge loop when its secondary signal in the output of final stage transmission display unit is unusual.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102636893A CN102299509A (en) | 2011-09-07 | 2011-09-07 | Improved battery protection circuit with a plurality of serially connected battery units and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102636893A CN102299509A (en) | 2011-09-07 | 2011-09-07 | Improved battery protection circuit with a plurality of serially connected battery units and system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102299509A true CN102299509A (en) | 2011-12-28 |
Family
ID=45359753
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102636893A Pending CN102299509A (en) | 2011-09-07 | 2011-09-07 | Improved battery protection circuit with a plurality of serially connected battery units and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102299509A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08140278A (en) * | 1994-11-11 | 1996-05-31 | Nissan Motor Co Ltd | Charging/discharging protector for battery pack |
| CN1929188A (en) * | 2005-09-06 | 2007-03-14 | 富士通株式会社 | Anomaly detection method of battery pack, battery pack and electronic apparatus |
| US20090009133A1 (en) * | 2007-07-06 | 2009-01-08 | Yoshihisa Tange | Battery state monitoring circuit and battery apparatus |
| CN202231418U (en) * | 2011-09-07 | 2012-05-23 | 李嘉文 | Improved cell protection circuit and system for a plurality of serially connected cell units |
-
2011
- 2011-09-07 CN CN2011102636893A patent/CN102299509A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08140278A (en) * | 1994-11-11 | 1996-05-31 | Nissan Motor Co Ltd | Charging/discharging protector for battery pack |
| CN1929188A (en) * | 2005-09-06 | 2007-03-14 | 富士通株式会社 | Anomaly detection method of battery pack, battery pack and electronic apparatus |
| US20090009133A1 (en) * | 2007-07-06 | 2009-01-08 | Yoshihisa Tange | Battery state monitoring circuit and battery apparatus |
| CN202231418U (en) * | 2011-09-07 | 2012-05-23 | 李嘉文 | Improved cell protection circuit and system for a plurality of serially connected cell units |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9711977B2 (en) | Battery management system for transmitting secondary protection signal and diagnosis signal using a small number of insulation elements | |
| CN103532203B (en) | A kind of battery pack application node and matrix battery management system and implementation method | |
| EP3043188B1 (en) | Battery management system for outputting signal, capable of analyzing whether error has occured, and battery driving system including same | |
| CN101916983A (en) | Battery protection circuit and portable light | |
| US9013146B2 (en) | Secondary battery pack | |
| CN111600353A (en) | Lithium battery protection control ASIC chip system | |
| US10491013B2 (en) | Battery system having battery manager | |
| CN102067372A (en) | Secondary battery pack | |
| CN203377638U (en) | Switching-type battery pack charging discharging protection equalization circuit | |
| CN103259253A (en) | Cascaded battery protection circuit and system thereof | |
| CN204144974U (en) | The protection of lithium battery and inversion system | |
| CN104242374A (en) | Charge/discharge control circuit and battery device | |
| CN103078355A (en) | Battery discharging circuit system | |
| JP2011147203A (en) | Overcharge protection device of charging battery | |
| CN103094931A (en) | Power supply system and power protection circuit thereof | |
| CN202231418U (en) | Improved cell protection circuit and system for a plurality of serially connected cell units | |
| CN211377650U (en) | Control protection module of master-slave motor | |
| CN110391682B (en) | Battery charging and discharging circuit | |
| CN110994744A (en) | Multi-battery charging and discharging control device and system | |
| CN202178567U (en) | Battery protective circuit having multiple serially connected cell units and system | |
| CN203278206U (en) | Battery pack discharging protection circuit and device | |
| CN103855689B (en) | Cascaded battery protection circuit and system | |
| CN211830247U (en) | Multi-battery charging and discharging control device and system | |
| CN102299509A (en) | Improved battery protection circuit with a plurality of serially connected battery units and system | |
| CN101123364A (en) | Over charging/discharging protection circuit for charging/discharging system of multiple serial battery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20111228 |