CN101192750A - Battery pack/system and method with embedded cell monitor - Google Patents
Battery pack/system and method with embedded cell monitor Download PDFInfo
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- CN101192750A CN101192750A CNA2007101947687A CN200710194768A CN101192750A CN 101192750 A CN101192750 A CN 101192750A CN A2007101947687 A CNA2007101947687 A CN A2007101947687A CN 200710194768 A CN200710194768 A CN 200710194768A CN 101192750 A CN101192750 A CN 101192750A
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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
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- Y02E60/10—Energy storage using batteries
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Abstract
The invention discloses a battery pack system with an embedded cell monitor and a method thereof. The battery pack includes a battery cell and a cell monitor embedded in to each cell of the battery pack. The cell monitor inspects corresponding cell respectively. When an abnormal status (such as, an overtemperature status and/or an excessive pressure status) is inspected, the corresponding cell monitor generates an alert signal to the battery pack. The receiver in the battery pack receives the alert signal and generates a drive signal to the battery manage unit. The battery manage unit perform a corresponding protection action to protect the battery pack from being damaged in an abnormal status. Comparing with prior art, monitor precision of the cell in the battery pack is increased and the abnormal status of the cell is responded rapidly.
Description
Technical field
The invention relates to a kind of power-supply system, especially about a kind of battery system that has embedded battery unit monitors device.
Background technology
In the prior art, battery has been widely used in electronic equipments such as notebook computer, mobile phone, for these electronic equipments provide energy.Yet when battery is in the process of charge or discharge, the temperature of battery can increase.When exothermic reaction became the auto-excitation type heat release, lithium ion battery, the particularly battery of cobalt negative electrode chemical type can reach a critical temperature (for example, spending between 145 degree Celsius Celsius 135).Too high temperature will make the mis-behave of battery.
In conditional electronic equipment, can adopt the temperature of single thermistor with the monitoring battery group.Yet, when battery unit when the battery unit of thermistor is far away, thermistor just can't reflect the condition of overhigh temperature that this battery unit occurs apace.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of battery system, can improve the monitoring precision to battery unit, and the unusual condition that occurs at battery unit has response speed faster.
For solving the problems of the technologies described above; the invention provides a kind of battery pack; this battery pack comprises battery unit and embeds the battery unit watch-dog of described battery unit; wherein; described battery unit watch-dog; be used to monitor described battery unit; in case (for example detect unusual condition; overtemperature situation and/or overpressure conditions); described battery unit watch-dog produces an alarm signal to battery pack, and the receiver in the described battery pack can receive described alarm signal, and produces a drive signal to battery management unit; described battery management unit takes corresponding protection action with the protection battery pack at once, thereby avoids it to be damaged in unusual condition.
Compared with prior art, the present invention adopts and embed the battery unit watch-dog in each battery unit of battery pack, monitors the corresponding battery unit separately.In a single day the battery unit watch-dog detects unusual condition in the respective battery unit, can inform that unusual condition appears in battery pack.Therefore, can improve the accuracy of battery unit watch-dog and can have response speed faster at unusual condition.
Description of drawings
Below, can further understand purpose of the present invention, specific structural features and advantage by to the description of some embodiments of the present invention in conjunction with its accompanying drawing.
Figure 1 shows that the structured flowchart of the battery unit that has embedded battery unit monitors device of one embodiment of the present of invention;
Fig. 2 A is depicted as the circuit diagram of the battery unit that has embedded battery unit monitors device of one embodiment of the present of invention;
Fig. 2 B is depicted as the circuit diagram of the battery unit that has embedded battery unit monitors device of another embodiment of the present invention;
Figure 3 shows that the structured flowchart of the battery system of one embodiment of the present of invention;
Figure 4 shows that the structured flowchart of the battery system of another embodiment of the present invention;
Figure 5 shows that brilliant first profile of the embedded battery unit monitors device of one embodiment of the present of invention;
Figure 6 shows that brilliant first profile of the embedded battery unit monitors device of another embodiment of the present invention;
Figure 7 shows that the brilliant unit of the embedded battery unit monitors device of one embodiment of the present of invention;
Figure 8 shows that the structured flowchart of the electronic system of one embodiment of the present of invention;
Figure 9 shows that the method flow diagram by the battery system execution of one embodiment of the present of invention.
Embodiment
The invention discloses a kind of battery pack/system that has embedded battery unit monitors device.Because embodiment shown in the drawings is a purpose for example, for simplicity's sake, some sub-components and/or the peripheral assembly that should comprise usually among the present invention will omit explanation herein.When describing, used some specific terms in the hope of clear with most preferred embodiment of the present invention.Yet the content that specification of the present invention disclosed is not limited in the used term and the embodiment of indication.Obviously, every content has all comprised all equivalent technologies of carrying out in a similar manner.
In one embodiment, provide a kind of battery pack, comprised one or more battery units.The battery unit watch-dog is embedded in each battery unit, be used to monitor the corresponding battery unit, when predetermined state appears in described battery unit, produce alarm signal (for example, unusual condition or fault state).Each battery unit watch-dog comprises sensor circuit, is used to detect the predetermined state of corresponding battery unit and produces detection signal.Each battery unit watch-dog also comprises conveyer, is used for producing alarm signal according to the detection signal of battery unit watch-dog.Battery pack also comprises receiver and battery management unit, and wherein receiver is used for the receiving alarm signal, and battery management unit is then according to a kind of protection action (for example, stop batteries charging or termination battery power discharge) of alarm signal triggering to battery pack.
Figure 1 shows that the structured flowchart that has the battery unit 100 of embedded battery unit monitors device 101 according to an embodiment of the invention.Wherein, battery unit 100 is arranged in a battery pack (for simplicity's sake, not shown in Fig. 1).Battery unit watch-dog 101 embeds in the battery unit 100 and is coupled between the positive pole 131 and negative pole 133 of battery unit 100, is used for monitoring battery unit 100, when predetermined state (for example, unusual condition) appears in battery unit 100, produces alarm signal 191.In one embodiment, described unusual condition can include, but are not limited to overpressure conditions or overtemperature situation.In one embodiment, battery unit watch-dog 101 comprises sensor circuit 104, is used to detect the unusual condition of battery unit 100 appearance and produce the unusual condition that detection signal 103 detects with expression.Battery unit watch-dog 101 also comprises conveyer 135, is used to receive detection signal 103, and produces alarm signal 191 according to the detection signal 103 from sensor circuit 104.Advantageously, battery pack can obtain alarm signal 191, and execution corresponding protection action (for example, stopping batteries charging or termination battery power discharge) is damaged in unusual condition to prevent battery pack.
Fig. 2 A is depicted as the detailed circuit diagram that has the battery unit 100A of embedded battery unit monitors device 101 according to an embodiment of the invention.The unit identical with mark among Fig. 1 has similar function, for brevity, will not carry out repeatability to it at this and describe.In one embodiment, sensor circuit 104 is used to detect the unusual condition of battery unit 100A appearance and produce detection signal 103.Conveyer 135A is used for producing alarm signal 191 according to the detection signal 103 from sensor circuit 104.
More particularly, sensor circuit 104 comprises voltage sensor 111, comparator 117 and logic OR (OR) door 121.In one embodiment, voltage sensor 111 can be a resistor.Voltage sensor 111 is used for the voltage of monitoring battery unit 110A.Comparator 117 will be compared by voltage and the reference voltage 113 that voltage sensor 111 monitors.Reference voltage 113 can be a reservation threshold voltage.If the voltage of battery unit 110A is higher than reference voltage 113, then the overvoltage situation appears in expression, and comparator 117 produces a signal (for example, high level signal) to logic sum gate 121.
In one embodiment, sensor circuit 104 also comprises temperature sensor 115 and comparator 119.In one embodiment, temperature sensor 115 can be a thermistor.Temperature sensor 115 is used for the temperature of monitoring battery unit 110A, and produces the temperature of a signal with expression battery unit 110A, and this temperature signal has level Vt.Comparator 119 compares level Vt and reference voltage 113.If level Vt is higher than reference voltage 113, then the overtemperature situation appears in expression, and comparator 119 produces a signal (for example, high level signal) to logic sum gate 121.
In one embodiment, voltage and the temperature of voltage sensor 111 and temperature sensor 115 difference persistent surveillance battery unit 110A.If unusual condition (for example, overvoltage situation and/or overtemperature situation), logic sum gate 121 can produce detection signal 103 (for example, high level signal) to conveyer 135A.If unusual condition, conveyer 135A can produce alarm signal 191 to battery pack according to detection signal 103.More particularly, be higher than pre-set threshold value, will produce alarm signal 191 if the voltage of battery unit 110A is higher than the temperature of pre-set threshold value and/or battery unit 110A.Then, can carry out corresponding protection action with the protection battery pack.
In one embodiment, the conveyer 135A switch 107 (for example transistor) that comprises pulse generator 105, resistance 109 and be coupled in pulse generator 105.When pulse generator 105 was received the detection signal 103 of expression unusual condition, pulse generator 105 can produce a series of pulses to switch 107 according to detection signal 103.In one embodiment, pulse generator 105 can be in response to detection signal 103, and produces the high-order current impulse that a series of frequencies are f0 (for example, duty ratio is 1% pulse-width signal).Switch 107 is used to receive the pulse train from pulse generator 105, and produces alarm signal 191.In one embodiment, by pulse with periodically conducting and disconnections of switch 107.Therefore, in one embodiment alarm signal 191 is expressed as the AC signal that frequency is f0.When switch 107 conductings, the battery cell voltage of battery unit 110A descends.So in one embodiment, in response to alarm signal 191, the battery cell voltage between positive pole 131 and the negative pole 133 can be expressed as the alternating voltage that frequency is f0.
Fig. 2 B is depicted as the detailed circuit diagram of the battery unit 100B with embedded battery unit monitors device 101 according to another embodiment of the invention.The unit identical with mark among Fig. 2 A with Fig. 1 has similar function, for brevity, will not carry out repeatability to it at this and describe.In one embodiment, battery unit watch-dog 101 comprises conveyer 135B, is used to receive detection signal 103, and produces alarm signal 191 according to detection signal 103.More particularly, conveyer 135B comprises oscillator 205 and the electric capacity 207 that is coupled in oscillator 205 in one embodiment.In one embodiment, oscillator 205 can be a radiofrequency signal single-tone oscillator.In another embodiment, oscillator 205 can be a radio frequency double tone oscillator.
According to above description at Fig. 2 A and Fig. 2 B, alarm signal 191 can reflect the unusual condition that battery unit 100 occurs, for example overtemperature and/or overpressure conditions.Therefore, in response to alarm signal 191, in the battery unit a kind of alternating voltage can appear.Below will at how detecting this alarm signal, and if how unusual condition will carry out aspects such as related measure sets forth in conjunction with Fig. 3.
Figure 3 shows that the structured flowchart of battery system 300 according to an embodiment of the invention (for example, battery pack).Battery pack 300 comprises one or more stacks of cells 310 that are the serial or parallel connection coupling, and each battery unit can adopt structure as shown in Figure 1.In each battery unit in the battery unit watch-dog embedding stacks of cells 310.Therefore, by each embedded battery unit monitors device each battery unit in the monitoring battery unit group 310 independently.Battery pack 300 also comprises positive pole 331, negative pole 333, receiver 301, battery management unit 305 and the switch of being controlled by battery management unit 305 307.According to above description at Fig. 2 A and Fig. 2 B, when detecting battery unit when a kind of unusual condition (for example, overtemperature situation and/or overpressure conditions) occurring, battery unit is in response to alarm signal, and battery unit produces a kind of alternating voltage.In one embodiment, receiver 301 is coupled between the positive pole 331 and negative pole 333 of battery pack 300, by the detecting positive pole 331 of battery pack 300 and the alternating voltage between the negative pole 333 to receive alarm signal from the battery unit watch-dog.Receiver 301 also can produce drive signal 303 according to alarm signal.
In one embodiment, receiver 301 comprises a high pass filter by electric capacity 313 and resistance 315 series coupled, is used for the noise that battery pack 300 is followed in filtering.In one embodiment, if from the frequency f 0 of the alarm signal (for example, AC signal) of stacks of cells 310 be higher than high pass filter by frequency, receiver 301 can produce drive signal 303.Battery management unit 305 can receive from the drive signal 303 of receiver 301 and according to drive signal 303 and produce switching signal 391.Battery management unit 305 can be carried out corresponding protection action with protection battery pack 300 in response to switching signal 391.For example, be damaged for fear of battery pack 300, switching signal 391 disconnects switch 307 to stop cell charging.
In one embodiment, battery management unit 305 comprises circuit for detecting 340, is used to detect the drive signal 303 from receiver 301.This structure only is for its purposes being described, also can adopting other structures in battery management unit 305.In one embodiment, circuit for detecting 340 comprises rectifier 341 and comparator 345.Rectifier 341 can be a hf rectifier, is used to receive drive signal 303 and drive signal 303 is carried out rectification.In one embodiment, rectifier 341 produces a voltage signal according to drive signal 303, and comparator 345 compares this voltage signal and reference signal 343.In one embodiment, if be higher than the level of reference signal 343 from the level of the voltage signal of rectifier 341, comparator 345 signals of output (for example, high level signal) are to battery management unit 305.Afterwards, Power Management Unit 305 can produce switching signal 391 to trigger the protection action to battery pack 300 according to comparative result.For example, switching signal 391 can disconnect the switch 307 that is coupled in battery pack 300 positive poles 331.Therefore, disconnect the connection between battery pack 300 and load or charger (for simplicity's sake, not shown in Fig. 3), and can protect battery pack 300 in overtemperature situation and/or overpressure conditions, to be damaged to avoid it.
Figure 4 shows that the structured flowchart of battery system 400 according to an embodiment of the invention (for example, battery pack).The unit identical with mark among Fig. 3 has similar function, for brevity, will not carry out repeatability to it at this and describe.Battery pack 400 comprises receiver 401, is similar to the receiver 301 among Fig. 3.Receiver 401 detectings are from the alarm signal of stacks of cells 310, and generation drive signal 303 is to battery management unit 305.In one embodiment, receiver 401 comprises by the band pass filter of electric capacity 313, inductance 417 and resistance 315 series coupled, is used for the noise that battery pack 400 is followed in filtering.In one embodiment, resonance frequency that can band pass filter is set to equal the frequency of alarm signal 191 among Fig. 2 A and Fig. 2 B, so alarm signal can be passed through band pass filter.Like this; receiver 401 receives from the high frequency alarm signal of stacks of cells 310 and produces drive signal 303; according to drive signal 303; battery management unit 305 can produce switching signal 391; this switching signal 391 can trigger by control switch 307 protection of battery pack 400 is moved; for example, under the control of battery management unit 305, can switch 307 be disconnected by switching signal 391.Therefore, disconnect the connection between battery pack 400 and load or charger (for simplicity's sake, not shown in Fig. 4), and can protect battery pack 400 in unusual condition, to be damaged to avoid it.
In other words, battery unit watch-dog 101 in embedding battery unit 100 (for example detects a kind of predetermined state, overtemperature situation and/or overpressure conditions) time, wherein battery unit 100 is from stacks of cells 310, and battery unit watch-dog 101 can produce an alarm signal.In one embodiment, alarm signal can cause producing in the battery unit 100 alternating voltage.Therefore, in response to alarm signal, between the positive pole 331 of battery pack 300 (400) and the negative pole 333 alternating voltage can appear.Subsequently, receiver 301 (401) is detected alarm signals and is produced drive signal 303 to battery management unit 305.Battery management unit 305 can produce can control switch 307 switching signal 391.According to drive signal 303, under the control of battery management unit 305, switch 307 is disconnected with protection battery pack 300 (400).Advantageously, each battery unit in the stacks of cells 310 is monitored by independent embedded battery unit monitors device.If the some battery units in the stacks of cells 310 are in overtemperature and/or overpressure conditions, the battery unit watch-dog in this battery unit can send an alarm signal with warning battery pack 300 (400).Thus, thus carry out corresponding protection action protection battery pack 300 (400) to avoid it in unusual condition, to be damaged.
As described in Fig. 2 B, conveyer 135B comprises electric capacity 207, and the alarm signal that is used for the device of self-oscillation in the future 205 is passed to the positive pole 131 of battery unit 100B.With reference to figure 5 and Fig. 6, the embodiment of this electric capacity in manufacture process described below.
According to one embodiment of present invention, Figure 5 shows that the profile of the brilliant unit 500 that has made battery unit watch-dog (for example, the battery unit watch-dog 101 among Fig. 2 B) therein.As shown in Figure 5, brilliant unit 500 comprises metal level 503, metal level 505 and insulator 507.Insulator 507 is isolated metal level 503 and metal level 505.The circuit 501 that is coupled in metal level 503 and metal level 505 comprises sensor circuit 104 and the oscillator 205 among Fig. 2 B.In the manufacture process of brilliant unit 500, when making sensor circuit 104 and oscillator 205, form metal level 503 and metal level 505.Advantageously, insulator 507 is formed between metal level 503 and the metal level 505, so metal level 503, insulator 507 and metal level 505 can constitute the electric capacity 207 with big capacitance.So this structure can be avoided forming two-layer extra metal level for making electric capacity, can reduce the cost of brilliant unit 500 simultaneously.
According to one embodiment of present invention, Figure 6 shows that another profile of the brilliant unit 600 that has made battery unit watch-dog 101 therein.Brilliant unit 600 comprises the multiple layer metal layer, for example metal level 603, metal level 605 and metal level 607.By insulator 615 and insulator 617 these metal levels are isolated from each other.In one embodiment, metal level 603 is coupled by through hole 613 and metal level 607.In one embodiment, the circuit 601 that is coupled in metal level 605 and metal level 607 comprises sensor circuit 104 and the oscillator 205 among Fig. 2 B.In the manufacture process of brilliant unit 600, when making sensor circuit 104 and oscillator 205, form metal level 603, metal level 605 and metal level 607.Advantageously, the multiple layer metal layer can enlarge the perpendicular layers quantity of available electric capacity.Therefore, metal level 603, metal level 605 and separator 615 can constitute first electric capacity, and metal level 605, metal level 607 and separator 617 can constitute second electric capacity.As shown in Figure 6, first electric capacity and the second electric capacity parallel coupled.Advantageously, electric capacity 207 can comprise first electric capacity and second electric capacity in parallel.Therefore, the i.e. twice of the capacitance of electric capacity among Fig. 5 of the capacitance of shunt capacitance among Fig. 6.In one embodiment, do not need extra metal level to construct electric capacity and can reduce the cost of brilliant unit 600.
According to one embodiment of present invention, Figure 7 shows that the brilliant unit 700 of battery unit watch-dog of battery unit watch-dog 101.In one embodiment, battery unit watch-dog 101 is manufactured in the brilliant unit 700 of battery unit watch-dog.The brilliant unit 700 of battery unit watch-dog comprises bottom 705 (for example, substrates) and top 703 (for example, the metal level 603 among the metal level among Fig. 5 503 or Fig. 6).In one embodiment, because bottom 705 ground connection, bottom 705 can be coupled in the negative pole of battery unit 100.In one embodiment, top 703 is forward contacts, can be coupled via the positive pole 131 of single line and battery unit 100.Therefore, the brilliant unit of battery unit watch-dog can be embedded in the battery unit 100 by single line.Advantageously, the brilliant unit 700 of battery unit watch-dog can be integrated in the top cover of battery unit 100 in one embodiment, or in another embodiment the brilliant unit 700 of battery unit watch-dog be integrated in the center of battery unit 100.
Battery pack 300 (400) can be applicable in the various electronic.According to one embodiment of present invention, Figure 8 shows that a kind of electronic equipment 800, for example electric motor car, computer etc.In one embodiment, electronic system 800 can comprise battery pack 804 and the load 806 that is coupled in battery pack 804.In one embodiment, load 806 can include, but are not limited to, vehicular engine, computer system etc.In one embodiment, electronic system 800 comprises input 802, and it can be coupled in an adapter (for simplicity's sake, not shown in Fig. 8).Adapter can be battery pack 804 chargings under certain conditions.Battery pack 804 can be load 806 power supplies.In one embodiment, the structure of battery pack 804 employings as shown in Fig. 3/Fig. 4.Battery pack 804 comprises one or more battery units, and each battery unit all is embedded into a battery unit watch-dog with the monitoring battery unit.Therefore, can accurately monitor and protect battery pack 804 to avoid battery pack 804 owing to any unusual condition that occurs on wherein each the battery unit is damaged.
Figure 9 shows that the method flow diagram of carrying out by battery system 900 according to an embodiment of the invention.In one embodiment, battery system adopts as Fig. 3/structure shown in Figure 4.Below with reference to Fig. 1, Fig. 2 A and Fig. 2 B are described Fig. 9.In square frame 902, each battery unit in the battery pack is monitored by corresponding battery unit monitors device 101 respectively, produce alarm signal 191 when predetermined state appears in the associated batteries unit, wherein, battery unit watch-dog 101 is to embed in each battery unit.In one embodiment, the temperature that temperature sensor 115 can the monitoring battery unit, when the temperature of battery unit is higher than reservation threshold, battery unit watch-dog 101 will produce alarm signal 191; Voltage sensor 111 can the monitoring battery unit voltage, when the voltage of battery unit is higher than reservation threshold, battery unit watch-dog 101 will produce alarm signal 191.In square frame 904, battery unit watch-dog 101 produces alarm signal 191 when predetermined state appears in battery unit.In one embodiment, predetermined state can be a kind of unusual condition (for example, overvoltage and/or an overtemperature situation).In square frame 906, can trigger a kind of protection action (for example, stopping cell charging) to battery unit according to alarm signal 191.In one embodiment, in response to alarm signal 191, can disconnect being connected between battery unit and load or charger.
Therefore, provide a kind of battery pack in the present invention.The battery unit watch-dog is embedded in each battery unit of battery pack, be used to monitor the corresponding battery unit.In case detect unusual condition (for example, overtemperature situation and/or overpressure conditions) in battery unit, corresponding battery unit monitors device can produce an alarm signal to battery pack.Receiver in the battery pack can the receiving alarm signal and is produced a drive signal to battery management unit.Thereby battery management unit can take corresponding protection action to avoid it to be damaged in unusual condition with the protection battery pack, for example, disconnects being connected between battery pack and other Circuits System.
As mentioned above, each battery unit in the battery pack comprises the battery unit watch-dog, monitors the corresponding battery unit separately.In a single day the battery unit watch-dog detects unusual condition in the respective battery unit, can inform that unusual condition appears in battery pack.Therefore, can improve the accuracy of battery unit watch-dog and can have response speed faster at unusual condition.
Yet embodiment described herein is many some that utilize in the embodiments of the invention, and sets forth by the mode of explanation rather than restriction here.It will be apparent to one skilled in the art that it should be apparent that, do not break away from itself under the prerequisite of the spirit and scope of the invention that appended claims limits, can make many other embodiment.In addition, although element of the present invention be described or require to be singulative, unless clearly statement is limited to singulative, otherwise also comprise plural form.
Claims (24)
1. battery pack is characterized in that comprising:
Battery unit; And
Embed the battery unit watch-dog of described battery unit, be used to monitor described battery unit, when predetermined state appears in described battery unit, produce an alarm signal.
2. battery pack according to claim 1, it is characterized in that described battery unit watch-dog comprises temperature sensor, be used to monitor the temperature of described battery unit, when the temperature of described battery unit was higher than reservation threshold, described battery unit watch-dog produced described alarm signal.
3. battery pack according to claim 1, it is characterized in that described battery unit watch-dog comprises voltage sensor, be used to monitor the voltage of described battery unit, when the voltage of described battery unit was higher than reservation threshold, described battery unit watch-dog produced described alarm signal.
4. battery pack according to claim 1 is characterized in that described battery unit watch-dog comprises:
Sensor circuit is used to detect the described predetermined state of described battery unit, and produces detection signal; And
Conveyer receives described detection signal, and produces described alarm signal according to described detection signal.
5. battery pack according to claim 4 is characterized in that described conveyer comprises:
Pulse generator is used to receive described detection signal, and produces a plurality of pulses according to described detection signal; And
Be coupled in the switch of described pulse generator, be used to receive described a plurality of pulse, and produce described alarm signal.
6. battery pack according to claim 4 is characterized in that described transmitter comprises:
Oscillator is used to receive described detection signal, and produces described alarm signal according to described detection signal; And
Be coupled in the electric capacity of described oscillator, be used for described alarm signal is passed to described battery unit.
7. battery pack according to claim 1 is characterized in that also comprising:
Be coupled in the positive pole of described battery pack and the receiver between the negative pole, be used to receive described alarm signal, and produce drive signal according to described alarm signal; And
Battery management unit is used to receive described drive signal, and produces switching signal according to described drive signal, and wherein said switching signal can trigger the protection action to described battery pack.
8. battery pack according to claim 7 is characterized in that described receiver comprises high pass filter.
9. battery pack according to claim 7 is characterized in that described receiver comprises band pass filter.
10. battery pack according to claim 7 is characterized in that described battery management unit comprises:
Rectifier is used to receive described drive signal, and produces voltage signal; And
Comparator is used for described voltage signal and reference signal are compared, and produces described switching signal according to the result of described comparison.
11. an electronic system is characterized in that comprising:
Load; And
Battery pack is used to described electric, and wherein said battery pack comprises:
Battery unit; And
Embed the battery unit watch-dog of described battery unit, be used to monitor described battery unit, when predetermined state appears in described battery unit, produce alarm signal.
12. electronic system according to claim 11, it is characterized in that described battery unit watch-dog comprises temperature sensor, be used to monitor the temperature of described battery unit, when the described temperature of described battery unit was higher than reservation threshold, described battery unit watch-dog produced described alarm signal.
13. electronic system according to claim 11, it is characterized in that described battery unit watch-dog comprises voltage sensor, be used to monitor the voltage of described battery unit, when the described voltage of described battery unit was higher than reservation threshold, described battery unit watch-dog produced described alarm signal.
14. electronic system according to claim 11 is characterized in that described battery unit watch-dog comprises:
Sensor circuit is used to detect the described predetermined state of described battery unit, and produces detection signal; And
Conveyer is used to receive described detection signal, and according to producing described alarm signal from described detection signal.
15. electronic system according to claim 14 is characterized in that described conveyer comprises:
Pulse generator is used to receive described detection signal, and produces a plurality of pulses according to described detection signal; And
Be coupled in the switch of described pulse generator, be used to receive described a plurality of pulse and produce described alarm signal.
16. electronic system according to claim 14 is characterized in that described transmitter comprises:
Oscillator is used to receive described detection signal, and produces described alarm signal according to described detection signal; And
Be coupled in the electric capacity of described oscillator, be used for described alarm signal is passed to described battery unit.
17. electronic system according to claim 11 is characterized in that also comprising:
Be coupled in the positive pole of described battery pack and the receiver between the negative pole, be used to receive described alarm signal, and produce drive signal according to described alarm signal; And
Battery management unit is used to receive described drive signal, and produces switching signal according to described drive signal, and wherein said switching signal can trigger the protection action to described battery pack.
18. electronic system according to claim 17 is characterized in that described battery management unit comprises:
Rectifier is used to receive described drive signal, and produces voltage signal; And
Comparator is used for described voltage signal and reference signal are compared.
19. electronic system according to claim 11 is characterized in that described load is a vehicular engine.
20. electronic system according to claim 11 is characterized in that described load is a computer system.
21. a method is used for monitor battery pack, it is characterized in that comprising:
Employing battery unit watch-dog monitors the battery unit in the described battery pack, and wherein said battery unit watch-dog is embedded in the described battery unit; And
When predetermined state appears in described battery unit, produce alarm signal.
22. method according to claim 21 is characterized in that comprising:
Monitor the temperature of described battery unit; And
When the temperature of described battery unit is higher than reservation threshold, produce described alarm signal.
23. method according to claim 21 is characterized in that comprising:
Monitor the voltage of described battery unit; And
When the voltage of described battery unit is higher than reservation threshold, produce described alarm signal.
24. method according to claim 21 is characterized in that comprising:
According to the protection action of described alarm signal triggering to described battery pack.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US87207706P | 2006-12-01 | 2006-12-01 | |
| US60/872,077 | 2006-12-01 | ||
| US11/998,579 | 2007-11-30 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110209067.2A Division CN102290617B (en) | 2006-12-01 | 2007-12-03 | Battery, electric system and method for monitoring battery |
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| Publication Number | Publication Date |
|---|---|
| CN101192750A true CN101192750A (en) | 2008-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101947687A Pending CN101192750A (en) | 2006-12-01 | 2007-12-03 | Battery pack/system and method with embedded cell monitor |
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| CN (1) | CN101192750A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101807732A (en) * | 2009-02-17 | 2010-08-18 | 索尼公司 | Battery pack and detection method |
| CN103185866A (en) * | 2011-12-28 | 2013-07-03 | 凹凸电子（武汉）有限公司 | Battery detection circuit, battery detection method and battery detection system |
| CN105826896A (en) * | 2015-01-06 | 2016-08-03 | 海洋王照明科技股份有限公司 | Overvoltage and temperature protection circuit |
| CN105993086A (en) * | 2014-02-18 | 2016-10-05 | 罗伯特·博世有限公司 | Switching device for a battery, and battery comprising said switching device |
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2007
- 2007-12-03 CN CNA2007101947687A patent/CN101192750A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101807732A (en) * | 2009-02-17 | 2010-08-18 | 索尼公司 | Battery pack and detection method |
| CN103185866A (en) * | 2011-12-28 | 2013-07-03 | 凹凸电子（武汉）有限公司 | Battery detection circuit, battery detection method and battery detection system |
| CN103185866B (en) * | 2011-12-28 | 2015-09-23 | 凹凸电子（武汉）有限公司 | Battery detection circuit, detection method and detection system |
| CN105993086A (en) * | 2014-02-18 | 2016-10-05 | 罗伯特·博世有限公司 | Switching device for a battery, and battery comprising said switching device |
| US10224531B2 (en) | 2014-02-18 | 2019-03-05 | Robert Bosch Gmbh | Switching device for a battery, and battery comprising said switching device |
| CN105826896A (en) * | 2015-01-06 | 2016-08-03 | 海洋王照明科技股份有限公司 | Overvoltage and temperature protection circuit |
| CN105826896B (en) * | 2015-01-06 | 2019-01-15 | 海洋王照明科技股份有限公司 | over-voltage and temperature protection circuit |
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