CN101499544A - Battery apparatus, protection circuit, temperature monitoring method and temperature sensor laying method - Google Patents
Battery apparatus, protection circuit, temperature monitoring method and temperature sensor laying method Download PDFInfo
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- CN101499544A CN101499544A CNA2008100570052A CN200810057005A CN101499544A CN 101499544 A CN101499544 A CN 101499544A CN A2008100570052 A CNA2008100570052 A CN A2008100570052A CN 200810057005 A CN200810057005 A CN 200810057005A CN 101499544 A CN101499544 A CN 101499544A
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Abstract
The invention discloses a battery device, a battery device protection circuit and a method of monitoring the temperature of the battery device. The battery device comprises a shell, an electric core unit and a central management unit; wherein, the electric core unit and the central management unit are arranged in the shell; and the electrical core unit comprises a or a plurality of electrical core(s). The battery device of the embodiment of the invention further comprises at least one outer temperature sensor which is connected with the shell and at least one inner temperature sensor which is connected with the electrical core unit(s); and the outer temperature sensor and the inner temperature sensor are both connected with the central management unit (BMU). Preferentially, the battery device comprises a warning module. The invention can effectively monitor the electrical core unit and even the decline performance of each electrical core. Due to the warning function, the invention can alarm before the safety-related incident of the battery occurs, thereby effectively reducing the risk of safety incidents.
Description
Technical field
The present invention relates to the monitoring of battery (especially lithium ion battery) and battery temperature, particularly, relate to the method for arranging of the temperature sensor of the temperature monitoring method of protective circuit, cell apparatus of a kind of cell apparatus, cell apparatus and cell apparatus.
Background technology
At present, the battery that the portable terminal such as notebook computer on the market uses is generally power brick (Battery Pack), and generally there are three to nine electric cores the inside of power brick.The protective circuit part of power brick inside is used for the electric core that the integral body string connects together is carried out overcurrent, overcharges, crosses and put inner certain some the monitoring temperature of monitoring and power brick.Below be that example is described with the battery of notebook computer.
Yet even if the monitoring and protection of protective circuit has been arranged, the security incident that the variation (decaying) owing to electric in-core portion causes still can take place in the power brick of notebook computer.The cell safety accident mainly is that the reason by electric in-core portion causes.Especially the short circuit of electric in-core portion, this is the principal element that causes the Notebook Battery security incident.When internal short-circuit takes place when, outer protection circuit complete failure (owing to do not have electric current to flow out, so external circuit is not worked), and then cause the generation of security incident.
The protective circuit of Notebook Battery bag inside has under the electric situation in running order all the time in battery pack, that is to say, as long as the lithium ion battery group also has electric energy, protective circuit is just in running order.And as long as power brick is inserted on the notebook computer, on the mainboard of notebook computer, also some circuit (Stand By Circuit) is worked all the time.Like this, even if the user closes notebook computer, because this two parts circuit is in running order all the time, the electrochemical reaction of inside lithium ion cell is also carried out all the time, and as long as the electrochemical reaction of inside lithium ion cell does not stop, lithium ion battery just has the possibility of causing danger so.
In other words, for a lithium ion battery bag that electricity is arranged,, the dangerous possibility of blasting is arranged too, even in transportation, also can cause danger though be not inserted on the portable terminal such as notebook computer.
The design of the cell safety protection of adopting at present mainly contains following several:
(1) based on the monitoring of absolute temperature, only limit to monitoring battery bag inside a bit or 2 points, and the position of temperature sensor is very random.And, only monitor real time temperature to the monitoring of temperature, when absolute temperature meets or exceeds predetermined threshold, cut off the electric current main line or the electric current main line is cut off in thermo-fuse (Thermal Fuse) fusing by central management device BMU control switch mosfet.
(2) use the thermoswitch array, with control unit each thermoswitch is patrolled and examined, when the temperature of certain electric core (Cell) surpassed assign thresholds, switch disconnected, thereby judges that certain Cell breaks down.This kind method belongs to a kind of method of absolute temperature information monitoring, promptly obtains the information that absolute temperature changes.
(3) by hot good conductor one or more or whole at least electric core heat is associated together, and monitors real time temperature, remain at the processing method of temperature and report to the police after absolute temperature surpasses some assign thresholds with a transducer.
(4) increase temperature sensor on the accumulator housing of Cai Yonging, when internal storage battery absolute temperature surpassed assign thresholds, signal gave the alarm.
In realizing process of the present invention, the inventor finds that there are the following problems at least in the prior art: (1) only monitors real-time absolute temperature, under the situation of the electric in-core of generation portion short circuit, and protective effect complete failure; (2) only monitor absolute temperature and do not have warning function; (3) judge that as the early warning temperature early-warning conditions is abundant inadequately with absolute temperature; (4) the monitoring temperature point is provided with more arbitrarily, causes power brick inner space Temperature Distribution monitoring low precision.
Summary of the invention
Consider the problems referred to above that exist in the correlation technique and propose the present invention.For this reason, the present invention aims to provide a kind of cell apparatus, and the protective circuit of cell apparatus and temperature monitoring method, judges the performance condition of cell apparatus by the inside/outside temperature of real-time monitoring cell apparatus.
According to an aspect of the present invention, at first provide a kind of cell apparatus.
Cell apparatus according to the embodiment of the invention comprises housing, electric core unit, central management device, and wherein, electric core unit and central management device are contained in the housing, and electric core unit is made of one or more electric cores.Cell apparatus according to the embodiment of the invention further comprises: at least one external temperature sensor, be connected to housing, and be used for the external temperature of sensing cell apparatus; At least one internal temperature sensor is connected to electric core unit, is used for the temperature of sensing electricity core unit; Wherein, external temperature sensor and internal temperature sensor all are connected to central management device (BMU).
Preferably, the central management device also comprises: acquisition module is used to obtain the sensing temperature of external temperature sensor and internal temperature sensor; Logging modle, be used for according to the initial phase of sensing temperature record cell apparatus under the different operating state that obtains temperature curve or curved surface data and process relative temperature curve or curved surface data, wherein, the operating state of cell apparatus comprises: charged state, discharge condition, resting state.
Further preferably, also comprise according to the cell apparatus of the embodiment of the invention: alarm module, be connected to the central management device, be used for producing alarm signal satisfying under the situation of predetermined condition; Wherein, alarm module can be positioned at enclosure interior or outside.
Preferably, above-mentioned predetermined condition be following any: exist its process temperature distribution map amplitude of variation to surpass the monitoring point of the first changes in amplitude threshold value; Exist its process temperature to be higher than the monitoring point of second temperature threshold; The number of times that exists its process temperature to be higher than the 3rd temperature threshold in the given time surpasses the monitoring point of first frequency threshold value; Exist its process temperature rising speed to surpass the monitoring point of temperature rise speed threshold value; The sensing temperature of external temperature sensor surpasses the 4th temperature threshold; Wherein, each temperature sensor is all corresponding to a monitoring point.
Preferably, above-mentioned internal temperature sensor is specially the transducer that can the sensing two-dimension temperature distributes.
Preferably, exist under the situation of a plurality of internal temperature sensors, a plurality of internal temperature sensors are evenly distributed on the included electric core of electric core unit.
Preferably, on each electric core of electric core unit, be distributed with at least one internal temperature sensor respectively.
A kind of protective circuit of cell apparatus is provided according to a further aspect in the invention.
Protective circuit according to the cell apparatus of the embodiment of the invention comprises: at least one external temperature sensor is connected to the housing of cell apparatus; At least one internal temperature sensor is connected to the electric core unit of cell apparatus; The central management device, be connected with internal temperature sensor with external temperature sensor, obtain the sensing temperature of external temperature sensor and internal temperature sensor, and according to the initial phase of sensing temperature record cell apparatus under the different operating state that obtains to temperature curve or curved surface data and process relative temperature curve or curved surface data, wherein, the operating state of cell apparatus comprises: charged state, discharge condition, resting state.
Preferably, further comprise according to the protective circuit of the cell apparatus of the embodiment of the invention: alarm module, be connected to the central management device, be used for producing alarm signal satisfying under the situation of predetermined condition.
A kind of temperature monitoring method of cell apparatus is provided in accordance with a further aspect of the present invention.
Cell apparatus temperature monitoring method according to the embodiment of the invention comprises following processing: the initial external temperature of sensing cell apparatus under the different operating state and the initial internal temperature of each monitoring point, according to initial internal temperature and initial external temperature initial phase to temperature curve or curved surface data, wherein, the operating state of cell apparatus comprises: charged state, discharge condition, resting state; The process external temperature of real-time sensing cell apparatus and the process internal temperature of each monitoring point are according to process internal temperature and process external temperature forming process relative temperature curve or curved surface data; For different operating states, contrast initial phase in real time to temperature curve or curved surface data and process relative temperature curve or curved surface data, produce alarm signal satisfying under the situation of predetermined condition.
Preferably, in said temperature method for supervising according to the embodiment of the invention, the formation initial phase is specially the operation of temperature curve or curved surface data: according to initial internal temperature and initial external temperature, obtain initial relative temperature by pre-defined algorithm, and obtain initial phase to temperature curve or curved surface data according to initial relative temperature; The operation of forming process relative temperature curve or curved surface data is specially: according to process internal temperature and process external temperature, come the procurement process relative temperature by pre-defined algorithm, and obtain process relative temperature curve or curved surface data according to the process relative temperature.
Preferably, above-mentioned predetermined condition be following any: exist its process temperature distribution map amplitude of variation to surpass the monitoring point of the first changes in amplitude threshold value; Exist its process temperature to be higher than the monitoring point of second temperature threshold; The number of times that exists its process temperature to be higher than the 3rd temperature threshold in the given time surpasses the monitoring point of first frequency threshold value; Exist its process temperature rising speed to surpass the monitoring point of temperature rise speed threshold value; The external procedure temperature of sensing surpasses the 4th temperature threshold in real time.
Preferably, in said temperature method for supervising according to the embodiment of the invention, at least one external temperature sensor of housing by being connected to cell apparatus comes initial external temperature of sensing and process external temperature, and at least one internal temperature sensor of the electric core unit by being connected to cell apparatus comes sensing initial internal temperature and process internal temperature.
Preferably, above-mentioned internal temperature sensor is specially the transducer that can the sensing two-dimension temperature distributes.And preferably, exist under the situation of a plurality of internal temperature sensors, a plurality of internal temperature sensors are evenly distributed on the included electric core of electric core unit.
A kind of method for arranging of internal temperature sensor of cell apparatus is provided according to a further aspect in the invention.
In the method: a plurality of internal temperature sensors are evenly distributed on the internal electrical core of cell apparatus; Perhaps, be distributed with at least one internal temperature sensor on the electric core of each of cell apparatus.
A kind of method for arranging of external temperature sensor of cell apparatus is provided according to a further aspect in the invention.
In the method, under the situation that has an external temperature sensor, external temperature sensor is connected to cell apparatus housing the center or near the position of the external heat source of cell apparatus, existing under the situation of a plurality of external temperature sensors, a plurality of external temperature sensors are connected to equably the housing of cell apparatus.
At least one technical scheme in the technique scheme has following beneficial effect: change the performance decline situation of effective monitoring electricity core unit or even each electric core by the analysis temperature distribution map; And by increasing alarm function, no matter which kind of user mode battery is in, and can report to the police before battery generation security incident, thereby can reduce the security incident risk effectively.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the structural representation according to the cell apparatus of the embodiment of the invention;
Fig. 2 is the schematic diagram according to the temperature sensor layout of the cell apparatus of the embodiment of the invention;
Fig. 3 is the schematic diagram according to the alarm condition (1) of the cell apparatus of the relative temperature curve of the cell apparatus of the embodiment of the invention and the embodiment of the invention;
Fig. 4 is the detailed structure schematic diagram according to the cell apparatus of the embodiment of the invention;
Fig. 5 is the schematic diagram according to the alarm condition of the cell apparatus of the embodiment of the invention (2);
Fig. 6 is the schematic diagram according to the alarm condition of the cell apparatus of the embodiment of the invention (3);
Fig. 7 is the schematic diagram according to the alarm condition of the cell apparatus of the embodiment of the invention (4);
Fig. 8 is the schematic diagram according to the alarm condition of the cell apparatus of the embodiment of the invention (5);
Fig. 9 is the schematic diagram according to the cell apparatus protective circuit of the embodiment of the invention;
Figure 10 is the flow chart according to the temperature monitoring method of the cell apparatus of the embodiment of the invention.
Embodiment
Need to prove that at first cell apparatus of hereinafter mentioning or power brick preferably are applicable to the application scenario of using the many lithium-ion electric cores of connection in series-parallel, can be applied to all multiagents such as portable terminal such as notebook computer, video camera, electric motor car.For convenience of description, below will be that example describes with the notebook computer, should be appreciated that this explanation only is exemplary, carries out any restriction and be not used in to the present invention.Hereinafter with reference to accompanying drawing the embodiment of the invention is described.
Because the performance degradation of lithium ion battery all can cause its electric core internal resistance in use to increase, and then the internal resistance in use of electric core is increased, cause the temperature of electric core housing to raise.Same, the abnormal response of lithium-ion electric core inside also can make electric core temperature raise.Therefore, in the technical scheme that the embodiment of the invention provides, be provided with more than two temperature sensors,, and judge its performance by contrast relative temperature curve by the temperature of real-time monitoring lithium ion battery at the cell apparatus place.
Embodiment one
According to the embodiment of the invention, at first provide a kind of cell apparatus.
As shown in Figure 1, cell apparatus according to the embodiment of the invention comprises housing 102, electric core unit 104, central management device 106, wherein, electricity core unit 104 and central management device 106 are contained in the housing 102, the electricity core unit is made of one or more electric cores (Cell), exemplarily shows four electric cores (Cell 1～Cell 4) among Fig. 1.
As shown in Figure 1, the cell apparatus according to the embodiment of the invention further comprises: at least one external temperature sensor 108 (exemplarily showing among Fig. 1) is connected to housing 102; At least one internal temperature sensor 110 is connected to electric core unit 104; In addition, external temperature sensor 108 and internal temperature sensor 110 all are connected to central management device 106.
In order accurately to monitor in real time the Temperature Distribution of cell apparatus, a plurality of temperature sensors can be set as far as possible.For example, can on each face of housing 102, external temperature sensor 108 be set, also can on the Cell of electric core unit 104 or between the adjacent C ell internal temperature sensor 110 be set equably, preferably, on each Cell, be respectively provided to few internal temperature sensor 110.Can be understood as all corresponding monitoring point of each internal temperature sensor.But the present invention for the quantity of temperature sensor with and distribution mode there is no strict restriction, all within protection scope of the present invention.
Wherein, Fig. 2 shows a kind of exemplary layout of temperature sensor.As shown in Figure 2, external temperature sensor (TSensor 7) is connected to (that is, being arranged at) housing, and six internal temperature sensors (TSensor 1～TSensor 6) are connected to six electric cores respectively; And TSensor1～TSensor7 all is connected to the central management device BMU of cell apparatus.
Preferably, external temperature sensor 108 is used for the external temperature of sensing cell apparatus, and internal temperature sensor 110 is used for the temperature of sensing electricity core unit.
Preferably, central management device 106 further comprises acquisition module and logging modle, and wherein, acquisition module is used to obtain the sensing temperature of external temperature sensor 108 and internal temperature sensor 110; Logging modle is used for according to the sensing temperature that obtains, and obtains and the record relative temperature by pre-defined algorithm, and writes down initial phase accordingly to temperature curve or curved surface data and process relative temperature curve or curved surface data according to the relative temperature that obtains.
Need to prove that in an embodiment of the present invention, when internal temperature sensor was point sensor, relative temperature curve or curved surface data were specially the relative temperature curve data; When internal temperature sensor was dimension sensor, relative temperature curve or curved surface data were specially the relative temperature curved surface data.Hereinafter, will be that example describes with relative temperature curve data (being called for short the relative temperature curve down).
For example, can be when cell apparatus production be finished, by external temperature sensor 108 records (for example, at last procedure of production line or before dispatching from the factory) external temperature sensor of cell apparatus under the room temperature normal operating conditions, and the internal temperature by cell apparatus under the internal temperature sensor 110 online record room temperature normal operating conditionss, wherein, all be distributed with under the situation of internal temperature sensor, can record the temperature of each electric core at each electric core; The acquisition module of central management device 106 is used to obtain the sensing temperature of external temperature sensor and internal temperature sensor; Logging modle is used for obtaining relative temperature by pre-defined algorithm, and writes down the initial phase of cell apparatus to temperature curve (solid line as shown in Figure 3) according to relative temperature.
Again for example, under other situations such as the transportation of cell apparatus, use, the Temperature Distribution of monitoring battery device changes in real time.Particularly, by the external temperature sensor of external temperature sensor 108 real time record cell apparatus, and the internal temperature by internal temperature sensor 110 real time record cell apparatus.
Acquisition module also is used to obtain the sensing temperature of external temperature sensor and internal temperature sensor; The sensing temperature that logging modle also is used for obtaining according to acquisition module writes down the process relative temperature curve (as shown in Figure 3 dotted line) of cell apparatus under the different operating state.
Wherein, the temperature of each monitoring point relative temperature preferably on the relative temperature curve uses the purpose of relative temperature to be to get rid of extraneous factor, thereby whether the situation that obtains the cell self-heating is normal to judge that cell self works.Can obtain relative temperature by pre-defined algorithm, for example, a kind of pre-defined algorithm that obtains relative temperature is that internal temperature is deducted external temperature, that is, and and each monitoring point relative temperature=each monitoring point temperature-external temperature.In fact, subtraction only is shirtsleeve operation, for example, under many circumstances, also need to get rid of the heat that the miscellaneous part such as the device of notebook computer produces, other cell need to use more complicated and accurate algorithm get rid of the influence that extraneous factor is brought the cell temperature to the temperature effect of tested cell etc. this moment.
Need to prove, be under the situation of transducer that can sensing two-dimension temperature calibration at the said temperature transducer, and the central management device will obtain the temperature distribution information of two dimension.Need to prove still do not have dimension sensor at present on the market, can realize, perhaps realize by infrared technique by the mode of a plurality of internal temperature sensors of closely arranging successively.
Need to prove, no matter be that initial phase is to temperature curve or process relative temperature curve, the capital is different because of the difference of the operating state of cell apparatus, in other words, and initial/process relative temperature curve that cell apparatus can be corresponding different under different operating states.For example, can write down the initial/process relative temperature curve of cell apparatus under charging, discharge, resting state respectively.Like this, just can judge temperature curve by comparison process relative temperature curve and initial phase the performance or the state of cell apparatus certainly, before this, needs to judge earlier the operating state of battery, checks corresponding relative temperature curve according to operating state then.
Preferably, as shown in Figure 4, further comprise alarm module 112 according to the cell apparatus of the embodiment of the invention, it is connected to central management device 106, is used for producing alarm signal satisfying under the situation of predetermined condition; Wherein, alarm module can be positioned at housing 102 inner or outside (Fig. 4 shows the situation that is positioned at outside, and Fig. 2 shows the situation that is positioned at enclosure interior).Alarm module can be reported to the police in the mode of sounding, for example, can realize by buzzer shown in Figure 2; Be applied to have under the situation of Presentation Function equipment at cell apparatus, can also report to the police by the mode of display alarm information on the host window screen; Can also pass through network linking, warning message is passed to back-end server; As long as realize reminding user's cell apparatus to have the purpose of potential potential safety hazard.
The condition of reporting to the police for alarm module then can be provided with as required flexibly.For example, can under following situation, report to the police:
(1) exist its process relative temperature curvilinear motion amplitude (for example, the temperature of temperature curve being compared) with initial phase surpass the first changes in amplitude threshold value () monitoring point for example, 3 ℃, illustrate certain/the temperature rise amplitude of variation of some Cell is excessive; For example, the temperature sensor sequence number among Fig. 3 is the monitoring point of 4 transducer correspondence;
(2) exist its process temperature to be higher than the monitoring point of second temperature threshold (for example, shown in Figure 5 80 ℃), illustrate certain/temperature of some Cell is too high; For example, the temperature sensor sequence number among Fig. 5 is the monitoring point of 4 transducer correspondence;
(3) exist its process temperature at the fixed time (for example, 10 minutes) in (for example be higher than the 3rd temperature threshold, 77 ℃ shown in Figure 6) number of times surpass first frequency threshold value () monitoring point for example, 2 times, illustrate certain/temperature of some Cell (electric core) frequent near default high temperature;
(4) exist its process temperature rising speed surpass the temperature rise speed threshold value () monitoring point for example, △ T/ △ t shown in Figure 7, illustrate certain/temperature of some Cell raises too fast;
(5) sensing temperature of external temperature sensor surpasses the 4th temperature threshold (for example, shown in Figure 8 40 ℃), illustrates that external environment condition is higher, and wherein, No. 7 monitoring points among Fig. 8 are corresponding to external sensor.
Wherein, above-mentioned monitoring point be with temperature sensor one to one, that is, all corresponding monitoring point (for example, 7 sensing points corresponding with 7 transducers of Fig. 2 being shown among Fig. 5) of each temperature sensor.Under above-mentioned listed various situations, illustrate and be not suitable for using monitored cell apparatus this moment, the user need pull up battery or change environment for use, perhaps there is potential safety hazard in this cell apparatus, the user should be noted that, should not continue to use, therefore, can avoid the generation of security incident undoubtedly by the warning reminding user.
Embodiment two
According to the embodiment of the invention, provide a kind of protective circuit of cell apparatus.
As shown in Figure 9, this protective circuit comprises: at least one external temperature sensor 902 (among the figure exemplary show) is connected to the housing of cell apparatus; At least one internal temperature sensor 904 (among the figure exemplary show one) is connected to the electric core unit of cell apparatus; Central management device 906, be connected with internal temperature sensor 904 with external temperature sensor 902, obtain the sensing temperature of external temperature sensor 902 and internal temperature sensor 904, and according to the sensing temperature that obtains, by pre-defined algorithm (for example, can be subtraction) obtain relative temperature, write down initial phase to temperature curve or curved surface data and process relative temperature curve or curved surface data according to relative temperature again.
Preferably, shown in the frame of broken lines among Fig. 9, further comprise according to the protective circuit of the cell apparatus of the embodiment of the invention: alarm module 908, be connected to central management device 906, be used for producing alarm signal satisfying under the situation of predetermined condition.
The alarm operation of alarm module can be understood and implements with reference to the associated description of embodiment one.
Embodiment three
According to the embodiment of the invention; a kind of temperature monitoring method of cell apparatus is provided; this method for supervising preferably can use the cell apparatus of embodiment one and the protective circuit of embodiment two to realize, also can use other suitable devices to realize that the present invention is not particularly limited this.
As shown in figure 10, the cell apparatus temperature monitoring method according to the embodiment of the invention comprises following processing:
Step S1002, the initial external temperature of each monitoring point of sensing cell apparatus under the different operating state or initial internal temperature, obtain initial relative temperature according to initial internal temperature and initial external temperature by pre-defined algorithm, and form initial phase under the different operating state to temperature curve or curved surface data according to initial relative temperature, wherein, the operating state of cell apparatus includes but not limited to: charged state, discharge condition, resting state;
Step S1004, the process external temperature or the process internal temperature of each monitoring point of real-time sensing cell apparatus, pass through pre-defined algorithm procurement process relative temperature according to process internal temperature and process external temperature, and according to process relative temperature forming process relative temperature curve or curved surface data;
Step S1006, for different operating states, the contrast initial phase is to temperature curve and process relative temperature curve in real time, produce alarm signal (promptly satisfying under the situation of predetermined condition, in this step, before contrast relative temperature curve or curved surface data, at first need to judge the operating state of battery, and then contrast corresponding relative temperature curve).
Preferably, in step S1002, can obtain initial relative temperature by the initial internal temperature is deducted initial external temperature, and obtain initial phase to temperature curve or curved surface data according to initial relative temperature; And in step S1004, can come the procurement process relative temperature, and obtain process relative temperature curve or curved surface data according to the process relative temperature by the process internal temperature being deducted the process external temperature.
Preferably, the predetermined condition of mentioning in step S1006 can include but not limited to following situation: (1) exists its process relative temperature curvilinear motion amplitude to surpass the monitoring point of the first changes in amplitude threshold value; (2) exist its process temperature to be higher than the monitoring point of second temperature threshold; (3) number of times that exists its process temperature to be higher than the 3rd temperature threshold in the given time surpasses the monitoring point of first frequency threshold value; (4) exist its process temperature rising speed to surpass the monitoring point of temperature rise speed threshold value; (5) the external procedure temperature of sensing surpasses the 4th temperature threshold in real time.
Preferably, in step S1002 and step S1004, at least one external temperature sensor of housing that can be by being connected to cell apparatus comes initial external temperature of sensing and process external temperature, and at least one internal temperature sensor of the electric core unit by being connected to cell apparatus comes sensing initial internal temperature and process internal temperature.
Preferably, above-mentioned internal temperature sensor can be the transducer that can the sensing two-dimension temperature distributes.And can on each electric core of electric core unit, at least one internal temperature sensor be set all.
Embodiment four
According to the embodiment of the invention, provide a kind of method for arranging of internal temperature sensor of cell apparatus.
In the method: a plurality of internal temperature sensors are evenly distributed on the internal electrical core of cell apparatus; Perhaps, be distributed with at least one internal temperature sensor on the electric core of each of cell apparatus.(as shown in Figure 2)
Embodiment five
According to the embodiment of the invention, provide a kind of method for arranging of external temperature sensor of cell apparatus.
In the method, under the situation that has an external temperature sensor, external temperature sensor is connected to cell apparatus housing the center or near the position of the external heat source of cell apparatus, existing under the situation of a plurality of external temperature sensors, a plurality of external temperature sensors are connected to equably the housing of cell apparatus.For example, exist under the situation of two temperature sensors, can be connected in the surface of shell that contacts with air with one, another is connected in the surface of the housing that contacts with the system that uses cell apparatus.
By means of technique scheme of the present invention, change the performance decline situation of effective monitoring electricity core unit or even each electric core by the analysis temperature distribution curve; And by increasing alarm function, no matter which kind of user mode battery is in, and can report to the police under there is the situation of potential safety hazard in battery, thereby can reduce the security incident risk effectively.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (15)
1. a cell apparatus comprises housing, electric core unit, central management device, and wherein, described electric core unit and described central management device are contained in the described housing, and described electric core unit is made of one or more electric cores, it is characterized in that, further comprises:
At least one external temperature sensor is connected to described housing, is used for the external temperature of the described cell apparatus of sensing;
At least one internal temperature sensor is connected to described electric core unit, is used for the temperature of the described electric core unit of sensing;
Wherein, described external temperature sensor and described internal temperature sensor all are connected to described central management device.
2. cell apparatus according to claim 1 is characterized in that, described central management device also comprises:
The temperature acquisition module is used to obtain the sensing temperature of described external temperature sensor and described internal temperature sensor;
Logging modle, be used for writing down the initial phase of described cell apparatus under the different operating state to temperature curve or curved surface data and process relative temperature curve or curved surface data according to the described sensing temperature that described temperature acquisition module obtains, wherein, the operating state of described cell apparatus comprises: charged state, discharge condition, resting state.
3. cell apparatus according to claim 1 further comprises:
Alarm module is connected to described central management device, is used for producing alarm signal satisfying under the situation of predetermined condition; Wherein, described alarm module is positioned at described enclosure interior or outside.
4. cell apparatus according to claim 3 is characterized in that, described predetermined condition be following any:
There is the monitoring point of the distribution map amplitude of variation of its process temperature above the first changes in amplitude threshold value;
Exist its process temperature to be higher than the monitoring point of second temperature threshold;
The number of times that exists its process temperature to be higher than the 3rd temperature threshold in the given time surpasses the monitoring point of first frequency threshold value;
Exist its process temperature rising speed to surpass the monitoring point of temperature rise speed threshold value;
The sensing temperature of described external temperature sensor surpasses the 4th temperature threshold;
Wherein, each described temperature sensor is all corresponding to a monitoring point.
5. according to each described cell apparatus in the claim 1 to 4, it is characterized in that described internal temperature sensor is specially: the transducer that can the sensing two-dimension temperature distributes.
6. according to each described cell apparatus in the claim 1 to 4, it is characterized in that exist under the situation of a plurality of internal temperature sensors, described a plurality of internal temperature sensors are evenly distributed on the included electric core of described electric core unit.
7. according to each described cell apparatus in the claim 1 to 4, on each electric core of described electric core unit, be distributed with at least one internal temperature sensor respectively.
8. the protective circuit of a cell apparatus is characterized in that, comprising:
At least one external temperature sensor is connected to the housing of cell apparatus;
At least one internal temperature sensor is connected to the electric core unit of described cell apparatus;
The central management device, be connected with described internal temperature sensor with described external temperature sensor, obtain the sensing temperature of described external temperature sensor and described internal temperature sensor, and obtain and write down the initial phase of described cell apparatus under the different operating state temperature curve or curved surface data and process relative temperature curve or curved surface data according to the described sensing temperature that obtains, wherein, the operating state of described cell apparatus comprises: charged state, discharge condition, resting state.
9. protective circuit according to claim 8 is characterized in that, further comprises:
Alarm module is connected to described central management device, is used for producing alarm signal satisfying under the situation of predetermined condition.
10. a cell apparatus temperature monitoring method is characterized in that, comprising:
The initial external temperature of each monitoring point of sensing cell apparatus under the different operating state and initial internal temperature, form initial phase under the different operating state to temperature curve or curved surface data according to described initial internal temperature and described initial external temperature, wherein, the operating state of described cell apparatus comprises: charged state, discharge condition, resting state;
The process external temperature and the process internal temperature of described each monitoring point of the real-time described cell apparatus of sensing are according to described process internal temperature and described process external temperature forming process relative temperature curve or curved surface data;
For in different operating states, contrast described initial phase in real time to temperature curve or curved surface data and described process relative temperature curve or curved surface data, produce alarm signal satisfying under the situation of predetermined condition.
11. cell apparatus temperature monitoring method according to claim 10 is characterized in that,
Forming described initial phase is specially the operation of temperature curve or curved surface data: according to described initial internal temperature and described initial external temperature, obtain initial relative temperature by pre-defined algorithm, and obtain described initial phase to temperature curve or curved surface data according to described initial relative temperature;
The operation that forms described process relative temperature curve or curved surface data is specially: according to described process internal temperature and described process external temperature, come the procurement process relative temperature by described pre-defined algorithm, and obtain described process relative temperature curve or curved surface data according to described process relative temperature.
12. cell apparatus temperature monitoring method according to claim 11 is characterized in that, described predetermined condition be following any:
Exist its process temperature distribution map amplitude of variation to surpass the monitoring point of the first changes in amplitude threshold value;
Exist its process temperature to be higher than the monitoring point of second temperature threshold;
The number of times that exists its process temperature to be higher than the 3rd temperature threshold in the given time surpasses the monitoring point of first frequency threshold value;
Exist its process temperature rising speed to surpass the monitoring point of temperature rise speed threshold value;
The described external procedure temperature of sensing surpasses the 4th temperature threshold in real time.
13. according to each described cell apparatus temperature monitoring method in the claim 10 to 12, it is characterized in that, at least one external temperature sensor of housing by being connected to described cell apparatus comes described initial external temperature of sensing and described process external temperature, and at least one internal temperature sensor of the electric core unit by being connected to described cell apparatus comes described initial internal temperature of sensing and described process internal temperature.
14. the method for arranging of the internal temperature sensor of a cell apparatus is characterized in that: a plurality of internal temperature sensors are evenly distributed on the internal electrical core of cell apparatus; Perhaps, be distributed with at least one internal temperature sensor on the electric core of each of cell apparatus.
15. the method for arranging of the external temperature sensor of a cell apparatus, it is characterized in that: under the situation that has an external temperature sensor, described external temperature sensor is connected to described cell apparatus housing the center or near the position of the external heat source of cell apparatus, exist under the situation of a plurality of external temperature sensors, described a plurality of external temperature sensors are being connected to equably the housing of described cell apparatus.
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