CN103995236A - Capacity loss measuring method for battery system and battery system - Google Patents
Capacity loss measuring method for battery system and battery system Download PDFInfo
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- CN103995236A CN103995236A CN201410239031.2A CN201410239031A CN103995236A CN 103995236 A CN103995236 A CN 103995236A CN 201410239031 A CN201410239031 A CN 201410239031A CN 103995236 A CN103995236 A CN 103995236A
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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
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Abstract
The invention discloses a capacity loss measuring method for a battery system. The capacity loss measuring method comprises the following steps: in a first temperature range, when the battery system is in a full charge state, discharging the battery system into an empty electricity state from the full charge state, and recording a first discharge capacity when discharging is finished; keeping the first temperature range unchanged and charging the battery system into the full charge state from the empty electricity state; keeping the first temperature range unchanged, arranging the battery system for preset time in a first humidity range, and after the first preset time is due, stopping discharging and recording a second discharge capacity when the battery system is discharged till the battery system is in the empty electricity state again; the capacity loss rate of the battery system in the first temperature range is obtained according to the first discharge capacity and the second discharge capacity. According to the capacity loss measuring method for the battery system, the capacity loss situation of the battery system can be objectively, comprehensively and accurately reflected. The Invention further discloses the battery system.
Description
Technical field
The present invention relates to automobile technical field, particularly a kind of capacitance loss method of testing and battery system of battery system.
Background technology
Battery system, depositing in process, use procedure, all exists capacitance loss phenomenon, and the energy of battery system does not enter external circuit by electric discharge but the phenomenon of losing by alternate manner.In correlation technique, for the detection of the capacitance loss of battery system, normally by detecting the capacitance loss of battery core of cell, reflect the capacitance loss of battery system with the capacitance loss of the battery core of cell.
There is following shortcoming in aforesaid way: the capacitance loss of battery system is not merely the capacitance loss of the battery core of cell, therefore, reflects the capacitance loss of battery system with the capacitance loss of the battery core of cell, is inaccurate.
Summary of the invention
The present invention is intended at least one of solve the problems of the technologies described above.
For this reason, one object of the present invention is to propose a kind of capacitance loss method of testing of battery system.The capacitance loss situation that the method can be objective, reflect battery system comprehensively, exactly.
Another object of the present invention is to propose a kind of battery system.
To achieve these goals, the embodiment of a first aspect of the present invention discloses a kind of capacitance loss method of testing of battery system, comprise the following steps: A: under the first temperature range and described battery system in the time of full power state, described battery system is discharged to sky electricity condition by full power state, and records the first discharge capacity in the time that electric discharge finishes; B: keep described the first temperature range constant, described battery system is charged to full power state by empty electricity condition; C: keep described the first temperature range constant, described battery system was placed for first schedule time under the first humidity range, and after described first schedule time arrives again to the electric discharge of described battery system until described battery system stop discharging and record the second discharge capacity while being empty electricity condition; D: obtain the capacitance loss rate of described battery system under described the first temperature range according to described the first discharge capacity and described the second discharge capacity.
According to the method for the embodiment of the present invention, 4 aspects such as micro-short circuit consumption and the electric quantity balancing consumption of battery management system to power brick that can staticly consume from the chip of the battery core capacitance loss of the cell such as power brick, cell tube system, be assembled into power brick by cell are analyzed the capacity loss of battery system all sidedly, thereby can be objective, the capacitance loss situation that reflects comprehensively, exactly battery system.
In addition, the capacitance loss method of testing of battery system according to the above embodiment of the present invention can also have following additional technical characterictic:
In some instances, after described step B, also comprise: described battery system is placed to described first schedule time under the second temperature range and described the first humidity range; After described first schedule time arrives, described battery system is placed to second schedule time under described the first temperature range and the first humidity range; After described second schedule time arrives, again to the electric discharge of described battery system until described battery system stop discharging and record the 3rd discharge capacity while being empty electricity condition; Obtain the capacitance loss rate of described battery system under described the second temperature range according to described the first discharge capacity and described the 3rd discharge capacity, wherein, the lower limit temperature of described the second temperature range is higher than the ceiling temperature of described the first temperature range.
In some instances, also comprise: carrying out in the process of described steps A and described step B, detect described battery system and whether occur extremely; If there is extremely,, after described abnormal elimination, return to described steps A.
In some instances, the capacitance loss of described battery system comprises: micro-short circuit consumption and described battery management system that the battery core capacitance loss of the cell of described power brick, the chip of described cell tube system be static to be consumed, be assembled into described power brick by cell consume the electric quantity balancing of described power brick.
In some instances, described the first temperature range is [20 degree, 30 degree], described the second temperature range is [43 degree, 60 degree], described the first humidity range is [5%RH, 95%RH], described the first Preset Time is [25 days, 35 days], described full power state refers to that the state-of-charge SOC of described battery system is 100%, and described empty electricity condition refers to that the state-of-charge SOC of described battery system is the SOC lower threshold of demarcating.
The embodiment of second aspect present invention discloses a kind of battery system, comprise: power brick and cell tube system, described battery management system is used for: A: under the first temperature range and described battery system in the time of full power state, described battery system is discharged to sky electricity condition by full power state, and records the first discharge capacity in the time that electric discharge finishes; B: keep the first temperature range constant, battery system is charged to full power state by empty electricity condition; C: keep the first temperature range constant, and place under the first humidity range at described battery system after first schedule time, again to described battery system electric discharge until described battery system stop discharging and record the second discharge capacity while being empty electricity condition; D: obtain the capacitance loss rate of described battery system under described the first temperature range according to described the first discharge capacity and described the second discharge capacity.。
According to the battery system of the embodiment of the present invention, 4 aspects such as micro-short circuit consumption and the electric quantity balancing consumption of battery management system to power brick that can staticly consume from the chip of the battery core capacitance loss of the cell such as power brick, cell tube system, be assembled into power brick by cell are analyzed the capacity loss of battery system all sidedly, thereby can be objective, the capacitance loss situation that reflects comprehensively, exactly battery system.
In addition, battery system according to the above embodiment of the present invention can also have following additional technical characterictic:
In some instances, described constant in described the first temperature range of maintenance, after described battery system is charged to full power state by empty electricity condition, described battery management system also for: when described battery system is placed after described first schedule time under the second temperature range and described the first humidity range, and place after second schedule time under described the first temperature range and the first humidity range at described battery system thereupon, again to the electric discharge of described battery system until described battery system stop discharging and record the 3rd discharge capacity while being empty electricity condition; Obtain the capacitance loss rate of described battery system under described the second temperature range according to described the first discharge capacity and described the 3rd discharge capacity, wherein, the lower limit temperature of described the second temperature range is higher than the ceiling temperature of described the first temperature range.
In some instances, described battery management system also for: in the process of carrying out described A and described B, detect described battery system and whether occur extremely, if there is extremely,, after described abnormal elimination, return to described A.
In some instances, the capacitance loss of described battery system comprises: micro-short circuit consumption and described battery management system that the battery core capacitance loss of the cell of described power brick, the chip of described cell tube system be static to be consumed, be assembled into described power brick by cell consume the electric quantity balancing of described power brick.
In some instances, described the first temperature range is [20 degree, 30 degree], described the second temperature range is [43 degree, 60 degree], described the first humidity range is [5%RH, 95%RH], described the first Preset Time is [25 days, 35 days], described full power state refers to that the state-of-charge SOC of described battery system is 100%, and described empty electricity condition refers to that the state-of-charge SOC of described battery system is the SOC lower threshold of demarcating.
Additional aspect of the present invention and advantage in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Brief description of the drawings
Above-mentioned and/or additional aspect of the present invention and advantage accompanying drawing below combination is understood becoming the description of embodiment obviously and easily, wherein:
Fig. 1 is the process flow diagram of the capacitance loss method of testing of battery system according to an embodiment of the invention;
Fig. 2 is the structured flowchart of battery system according to an embodiment of the invention; And
Fig. 3 is the schematic diagram of battery system according to an embodiment of the invention.
Embodiment
Describe embodiments of the invention below in detail, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of identical or similar functions from start to finish.Be exemplary below by the embodiment being described with reference to the drawings, only for explaining the present invention, and can not be interpreted as limitation of the present invention.
In description of the invention, it will be appreciated that, term " " center ", " longitudinally ", " laterally ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end ", " interior ", orientation or the position relationship of instructions such as " outward " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of device or the element of instruction or hint indication must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as limitation of the present invention.In addition, term " first ", " second " be only for describing object, and can not be interpreted as instruction or hint relative importance.
In description of the invention, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and for example, can be to be fixedly connected with, and can be also to removably connect, or connect integratedly; Can be mechanical connection, can be also electrical connection; Can be to be directly connected, also can indirectly be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, can concrete condition understand above-mentioned term concrete meaning in the present invention.
Describe according to capacitance loss method of testing and the battery system of the battery system of the embodiment of the present invention below in conjunction with accompanying drawing.
Before describing according to the capacitance loss method of testing of the battery system of the embodiment of the present invention, first the battery system in the embodiment of the present invention is described.As shown in Figure 3, battery system comprises battery management system (BATTERY MANAGEMENT SYSTEM, be called for short BMS) and power brick, the electrokinetic cell that power brick is for example used for electric automobile, electrokinetic cell can further comprise multiple battery modules, as shown in Figure 3, the multiple cells that are connected with cell Management Controller LECU1 consist of a battery module, the multiple cells that are connected with cell Management Controller LECU2 consist of a battery module, the multiple cells that are connected with cell Management Controller LECUn consist of a battery module.Further, each battery module can comprise multiple cells.Battery management system comprises cell Management Controller (as LECU1 to LECUn) and battery management unit BMU.
Before the capacitance loss method of testing of battery system that uses the embodiment of the present invention is tested the capacitance loss rate of battery system; first battery system is carried out to pre-service; some Protection parameters of BMS are for example set; include but not limited to: power brick charge and discharge cycles Protection parameters; as overcharge, cross put, overcurrent, excess temperature, the parameters such as battery system charging, discharge cut-off voltage, state-of-charge SOC operating voltage range.For different power brick etc., its parameter also can be different.
The method is the method for the comprehensive evaluation of the system-level capacitance loss situation of battery system, and concrete capacitance loss situation can be evaluated from the following aspects, for example: the capacitance loss of cell in battery system; BMS equalizing circuit leakage current in battery system; The static consumption of chip such as the interior BMS of battery system; The micro-short circuit of introducing in the process of module or power brick is processed in cell assembling.The capacitance loss that is battery system includes but not limited to: micro-short circuit consumption and battery management system that the battery core capacitance loss of the cell of power brick, the chip of cell tube system be static to be consumed, be assembled into power brick by cell consume the electric quantity balancing of power brick.Above-mentioned four aspects have caused the main capacitance loss of battery system.
The capacitance loss method of testing of the battery system to the embodiment of the present invention is described below.As shown in Figure 1, the capacitance loss method of testing of battery system, comprises the steps: according to an embodiment of the invention
Step S101: under the first temperature range and battery system in the time of full power state, battery system is discharged to sky electricity condition by full power state, and records the first discharge capacity in the time that electric discharge finishes.
As a concrete example, the first temperature range is for example room temperature, is generally but is not limited to [20 degree, 30 degree].Full power state refers to that the state-of-charge SOC of battery system is 100%, and empty electricity condition refers to that the state-of-charge SOC of battery system is the SOC lower threshold of demarcating, for example: SOC lower threshold is 15%.Therefore, it (is SOC lower threshold that battery system is discharged into sky electricity condition by full power state, as monomer battery core voltage reaches 2.5V or power supply total voltage value lower than 240V, now, for example correspond to the SOC lower threshold of demarcation, battery management system BMS can initiatively cut off contactor, stops the electric discharge to power brick), and the record electric weight of emitting, i.e. the first discharge capacity C1.Certainly also can record state-of-charge SOC numerical value SOC1 now.
It should be noted that, in this step, to battery system discharge be at battery system in the first temperature range, and battery system carries out under full power state.Therefore, if battery system is not in the first temperature range before, need battery system to be placed on as the regular hour at 20 DEG C～30 DEG C, after 4 hours, discharge.If battery system not in full power state, is charged to battery system full power state (be SOC to 100%, BMS initiatively cuts off contactor, stops charging), also can record the electric weight C0, the SOC numerical value SOC0 that are filled with.
Step S102: keep the first temperature range constant, battery system is charged to full power state by empty electricity condition.That is: battery system is charged to full power state (be SOC while being 100%, BMS initiatively cuts off contactor, stops charging) by empty electricity condition, and can records the electric weight C2, the current state-of-charge SOC numerical value SOC2 etc. that are filled with.
Step S103: keep the first temperature range constant, battery system was placed for first schedule time under the first humidity range, and after first schedule time arrived again to battery system electric discharge until battery system stop discharging and record the second discharge capacity while being empty electricity condition.As a concrete example, the first humidity range is for example [5%RH, 95%RH].First schedule time can be made as about 1 month, for example [25 days, 35 days].
Specifically, first battery system is placed on to the first temperature range, in the environment of room temperature (as 23～30 DEG C), and humidity is within the scope of 5～95%RH, cut off battery system and outside any electrical connection, the power supply that cuts off BMS, ensure that BMS is in off working state.Ready rear beginning timing, places a period of time (time is 28～30 days).Then battery system is discharged, being discharged to sky electricity condition (is SOC lower threshold, as monomer battery core voltage reaches 2.5V or power supply total voltage value lower than 240V, and BMS system is initiatively cut off contactor, stop electric discharge), and record the second discharge capacity C3 (electric weight of emitting), certain state-of-charge SOC numerical value SOC3 now that also can record.
Step S104: obtain the capacitance loss rate of battery system under the first temperature range according to the first discharge capacity and the second discharge capacity.In one embodiment of the invention, can obtain the capacitance loss rate of battery system under the first temperature range by following formula, this formula is: (C1-C3)/C1*100%.Utilize this formula, for example obtained the at room temperature capacitance loss rate of battery system.
According to the method for the embodiment of the present invention, 4 aspects such as micro-short circuit consumption and the electric quantity balancing consumption of battery management system to power brick that can staticly consume from the chip of the battery core capacitance loss of the cell such as power brick, cell tube system, be assembled into power brick by cell are analyzed the capacity loss of battery system all sidedly, thereby can be objective, the capacitance loss situation that reflects comprehensively, exactly battery system.
In the above description, the method can be to such as under room temperature (as 23～30 DEG C), that the capacitance loss of battery system carries out is objective, comprehensively, evaluate exactly, but embodiments of the invention are not limited to this, also can be capable objective, comprehensively, evaluate exactly to the capacitance loss of long-term battery system under hot environment.For example realize in the following way.That is: after step S102, also comprise:
1, battery system is placed to first schedule time under the second temperature range and the first humidity range.Wherein, the second temperature range is for example hot environment, and for example the second temperature range is [43 degree, 60 degree].
Specifically, battery system is placed in hot environment (as 43 DEG C～60 DEG C), and humidity is within the scope of 5～95%RH.Afterwards, cut off battery system and outside any electrical connection, the power supply that cuts off BMS, ensure that BMS is in off working state.Ready rear beginning timing, places a period of time (time is 28～30 days).
2, after first schedule time arrived, battery system is placed to second schedule time under the first temperature range and the first humidity range; For example: under room temperature (as 23～30 DEG C) environment, battery system place some hours (as 4 hours, i.e. the second Preset Time), and the medial temperature of battery system and ambient temperature roughly the same.The object of doing is like this to make the temperature of battery system return to the temperature such as room temperature by high temperature.
3, after second schedule time arrived, again to battery system electric discharge until battery system stop discharging and record the 3rd discharge capacity while being empty electricity condition.For example: after above-mentioned condition is set up, battery system is discharged, being discharged to sky electricity condition (is SOC lower threshold, as the battery core voltage of cell reaches 2.5V or power supply total voltage value lower than 240V, BMS initiatively cuts off contactor, stop electric discharge), and record the 3rd discharge capacity C4, the electric weight of emitting etc.
4, obtain the capacitance loss rate of battery system under the second temperature range according to the first discharge capacity and the 3rd discharge capacity, wherein, the lower limit temperature of the second temperature range is higher than the ceiling temperature of the first temperature range.For example: pass through formula: (C1-C4)/C1*100% obtains the capacitance loss rate of battery system under high temperature (as 43 DEG C～60 DEG C) environment.Thus, can reflect objective, comprehensively, exactly the capacitance loss situation of battery system under hot environment.
For the capacitance loss that ensures the battery system detecting by the method for the embodiment of the present invention more accurately and reliably, whether the method also comprises: in the process of execution step S101 and step S102, detect battery system and occur extremely; If there is extremely,, after abnormal elimination, return to step S101.Ensureing that battery system does not break down under warning, battery system reference performance discharges and recharges battery system, and records related data.
It should be noted that, the prerequisite of method of carrying out the embodiment of the present invention be battery under the first temperature range and battery system in full power state.If do not meet above-mentioned precondition, the method first should be under room temperature (as the first temperature range, 23～30 DEG C), and it (is SOC automatic calibration to 100% that battery system is charged to full power state, BMS system is initiatively cut off contactor, stops charging).Thereby ensure the smooth execution of the method, ensure the reliability of testing result.
Certainly, passing through such as above-mentioned steps S103, after battery system electric discharge, for fear of battery system power shortage excessively and the serviceable life of reducing battery system, the method of the embodiment of the present invention also can be carried out charging more or less by empty electricity condition by battery system, as charges to half electricity condition (if state-of-charge SOC is certain parameter value between 40%～70%).Thereby effectively promote the serviceable life of battery system.
According to the method for the embodiment of the present invention, can be objective, the capacitance loss situation that reflects comprehensively, exactly battery system.
Further embodiment of the present invention provides a kind of battery system.As shown in Figure 2, according to the battery system 200 of the embodiment of the present invention, comprising: power brick 210 and cell tube system BMS.
Wherein, battery management system BMS is for A: under the first temperature range and battery system in the time of full power state, battery system is discharged to sky electricity condition by full power state, and records the first discharge capacity in the time that electric discharge finishes; B: keep the first temperature range constant, battery system is charged to full power state by empty electricity condition; C: keep the first temperature range constant, and place under the first humidity range at battery system after first schedule time, again to battery system electric discharge until battery system stop discharging and record the second discharge capacity while being empty electricity condition; D: obtain the capacitance loss rate of battery system under described the first temperature range according to the first discharge capacity and described the second discharge capacity.
Keeping, the first temperature range is constant, after battery system is charged to full power state by empty electricity condition, described battery management system BMS also for: when battery system is placed after first schedule time under the second temperature range and the first humidity range, and place after second schedule time under the first temperature range and the first humidity range at battery system thereupon, again to battery system electric discharge until battery system stop discharging and record the 3rd discharge capacity while being empty electricity condition; Obtain the capacitance loss rate of battery system under the second temperature range according to the first discharge capacity and the 3rd discharge capacity, wherein, the lower limit temperature of the second temperature range is higher than the ceiling temperature of the first temperature range.
In one embodiment of the invention, battery management system BMS also for: in the process of carrying out A and B, detect battery system and whether occur extremely, if there is extremely,, after abnormal elimination, return to A.
In one embodiment of the invention, the capacitance loss of battery system comprises: micro-short circuit consumption and battery management system that the battery core capacitance loss of the cell of power brick, the chip of cell tube system be static to be consumed, be assembled into power brick by cell consume the electric quantity balancing of power brick.
In one embodiment of the invention, the first temperature range is [20 degree, 30 degree], the second temperature range is [43 degree, 60 degree], the first humidity range is [5%RH, 95%RH], the first Preset Time is [25 days, 35 days], full power state refers to that the state-of-charge SOC of battery system is 100%, and empty electricity condition refers to that the state-of-charge SOC of described battery system is the SOC lower threshold of demarcating.
It should be noted that, the implementation of the specific implementation of the battery system of the embodiment of the present invention and method part is similar, specifically refers to the description of method part.In order to reduce redundancy, do not repeat.
According to the battery system of the embodiment of the present invention, 4 aspects such as micro-short circuit consumption and the electric quantity balancing consumption of battery management system to power brick that can staticly consume from the chip of the battery core capacitance loss of the cell such as power brick, cell tube system, be assembled into power brick by cell are analyzed the capacity loss of battery system at room temperature (as 23 to 30 degree) or high temperature (as 43 to 60 degree) all sidedly, thereby can be objective, the capacitance loss situation that reflects comprehensively, exactly battery system.
In the description of this instructions, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present invention or example in conjunction with specific features, structure, material or the feature of this embodiment or example description.In this manual, the schematic statement of above-mentioned term is not necessarily referred to identical embodiment or example.And specific features, structure, material or the feature of description can be with suitable mode combination in any one or more embodiment or example.
Although illustrated and described embodiments of the invention, those having ordinary skill in the art will appreciate that: in the situation that not departing from principle of the present invention and aim, can carry out multiple variation, amendment, replacement and modification to these embodiment, scope of the present invention is by claim and be equal to and limit.
Claims (10)
1. a capacitance loss method of testing for battery system, is characterized in that, comprises the following steps:
A: under the first temperature range and described battery system in the time of full power state, described battery system is discharged to sky electricity condition by full power state, and records the first discharge capacity in the time that electric discharge finishes;
B: keep described the first temperature range constant, described battery system is charged to full power state by empty electricity condition;
C: keep described the first temperature range constant, described battery system was placed for first schedule time under the first humidity range, and after described first schedule time arrives again to the electric discharge of described battery system until described battery system stop discharging and record the second discharge capacity while being empty electricity condition;
D: obtain the capacitance loss rate of described battery system under described the first temperature range according to described the first discharge capacity and described the second discharge capacity.
2. method according to claim 1, is characterized in that, after described step B, also comprises:
Described battery system is placed to described first schedule time under the second temperature range and described the first humidity range;
After described first schedule time arrives, described battery system is placed to second schedule time under described the first temperature range and the first humidity range;
After described second schedule time arrives, again to the electric discharge of described battery system until described battery system stop discharging and record the 3rd discharge capacity while being empty electricity condition;
Obtain the capacitance loss rate of described battery system under described the second temperature range according to described the first discharge capacity and described the 3rd discharge capacity,
Wherein, the lower limit temperature of described the second temperature range is higher than the ceiling temperature of described the first temperature range.
3. method according to claim 1 and 2, is characterized in that, also comprises:
Carrying out in the process of described steps A and described step B, detect described battery system and whether occur extremely;
If there is extremely,, after described abnormal elimination, return to described steps A.
4. method according to claim 1, it is characterized in that, the capacitance loss of described battery system comprises: micro-short circuit consumption and described battery management system that the battery core capacitance loss of the cell of described power brick, the chip of described cell tube system be static to be consumed, be assembled into described power brick by cell consume the electric quantity balancing of described power brick.
5. method according to claim 2, it is characterized in that, described the first temperature range is [20 degree, 30 degree], described the second temperature range is [43 degree, 60 degree], described the first humidity range is [5%RH, 95%RH], described the first Preset Time is [25 days, 35 days], described full power state refers to that the state-of-charge SOC of described battery system is 100%, described empty electricity condition refers to that the state-of-charge SOC of described battery system is the SOC lower threshold of demarcating.
6. a battery system, is characterized in that, comprising: power brick and cell tube system, and described battery management system is used for:
A: under the first temperature range and described battery system in the time of full power state, described battery system is discharged to sky electricity condition by full power state, and records the first discharge capacity in the time that electric discharge finishes;
B: keep the first temperature range constant, battery system is charged to full power state by empty electricity condition;
C: keep the first temperature range constant, and place under the first humidity range at described battery system after first schedule time, again to described battery system electric discharge until described battery system stop discharging and record the second discharge capacity while being empty electricity condition;
D: obtain the capacitance loss rate of described battery system under described the first temperature range according to described the first discharge capacity and described the second discharge capacity.
7. battery system according to claim 6, is characterized in that, described keep described the first temperature range constant, after described battery system is charged to full power state by empty electricity condition, described battery management system also for:
When described battery system is placed after described first schedule time under the second temperature range and described the first humidity range, and place after second schedule time under described the first temperature range and the first humidity range at described battery system thereupon, again to the electric discharge of described battery system until described battery system stop discharging and record the 3rd discharge capacity while being empty electricity condition;
Obtain the capacitance loss rate of described battery system under described the second temperature range according to described the first discharge capacity and described the 3rd discharge capacity,
Wherein, the lower limit temperature of described the second temperature range is higher than the ceiling temperature of described the first temperature range.
8. according to the battery system described in claim 6 or 7, it is characterized in that, described battery management system also for: in the process of carrying out described A and described B, whether detect described battery system occurs extremely, if there is extremely,, after described abnormal elimination, return to described A.
9. battery system according to claim 6, it is characterized in that, the capacitance loss of described battery system comprises: micro-short circuit consumption and described battery management system that the battery core capacitance loss of the cell of described power brick, the chip of described cell tube system be static to be consumed, be assembled into described power brick by cell consume the electric quantity balancing of described power brick.
10. battery system according to claim 7, it is characterized in that, described the first temperature range is [20 degree, 30 degree], described the second temperature range is [43 degree, 60 degree], described the first humidity range is [5%RH, 95%RH], described the first Preset Time is [25 days, 35 days], described full power state refers to that the state-of-charge SOC of described battery system is 100%, described empty electricity condition refers to that the state-of-charge SOC of described battery system is the SOC lower threshold of demarcating.
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| CN201410239031.2A CN103995236B (en) | 2014-05-30 | 2014-05-30 | The capacitance loss method of testing and battery system of battery system |
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