CN104569836B - Method and device for measuring heat generation power of battery under variable current working condition - Google Patents
Method and device for measuring heat generation power of battery under variable current working condition Download PDFInfo
- Publication number
- CN104569836B CN104569836B CN201410784794.5A CN201410784794A CN104569836B CN 104569836 B CN104569836 B CN 104569836B CN 201410784794 A CN201410784794 A CN 201410784794A CN 104569836 B CN104569836 B CN 104569836B
- Authority
- CN
- China
- Prior art keywords
- battery
- under
- heat power
- discharge
- operating mode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 30
- 230000020169 heat generation Effects 0.000 title abstract 7
- 238000007599 discharging Methods 0.000 claims abstract description 33
- 230000036962 time dependent Effects 0.000 claims description 23
- 238000005259 measurement Methods 0.000 claims description 21
- 238000004422 calculation algorithm Methods 0.000 claims description 13
- 230000005611 electricity Effects 0.000 claims description 6
- 238000012360 testing method Methods 0.000 abstract description 17
- 238000004364 calculation method Methods 0.000 abstract description 5
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 61
- 229910052744 lithium Inorganic materials 0.000 description 61
- 238000010586 diagram Methods 0.000 description 8
- 210000004027 cell Anatomy 0.000 description 4
- 239000000178 monomer Substances 0.000 description 4
- 238000000205 computational method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 210000000352 storage cell Anatomy 0.000 description 1
Landscapes
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The embodiment of the invention provides a method and a device for measuring heat generation power of a battery under a variable current working condition. The method comprises the following steps: measuring temperature rise data of the battery under different multiplying powers for charging and/or discharging, and calculating heat generation power of the battery under different multiplying powers according to the temperature rise data for charging and/or discharging; and generating a relation between the charging and/or discharging heat generation power and the current value of the battery by curve fitting according to the current value corresponding to the charging and/or discharging heat generation power under different multiplying powers. The embodiment of the invention realizes that the relation among the heat generation power, the current and the time of the battery under the working current working condition of change can be obtained by only carrying out simple temperature rise data test of the battery under the fixed multiplying power and carrying out theoretical calculation according to the test result, the test equipment is simple, the implementation is convenient, the cost is low, and the scheme for effectively measuring the heat generation power of the battery in the charging and discharging processes under the working current working condition is provided.
Description
Technical field
The present invention relates to power battery technology field, more particularly to a kind of heat power for measuring battery under time-dependent current operating mode
Method and apparatus.
Background technology
As new energy industry requires more and more higher, the heat management of lithium battery group to the performance and cycle life of lithium battery group
Scheme is more and more paid attention to, and thermal management scheme needs to be designed according to the caloric value of ion battery.Lithium at present
The caloric value majority of battery is described with temperature rise curve, and what this method obtained is temperature gap, it is impossible to is specifically given birth to
Thermal power and heat.
At present, prior art is generally tested the caloric value of lithium battery by accelerating calorimeter, but test equipment and
Somewhat expensive, most enterprises do not possess corresponding financial resources.And what test obtained in most cases is lithium battery in constant-current charge
Or the temperature rise curve of electric discharge, this operating mode of electric current changed with lithium battery under actual working state, discharge and recharge alternately
It is not consistent.
Therefore, the scheme for developing the heat power of battery under a kind of effectively measuring time-dependent current operating mode is one urgently to be resolved hurrily
The problem of.
The content of the invention
The embodiment provides it is a kind of measure time-dependent current operating mode under battery heat power method and apparatus, with
Realize the heat power of battery under effectively measuring time-dependent current operating mode.
According to an aspect of the invention, there is provided a kind of method for measuring the heat power of battery under time-dependent current operating mode,
Including：
The temperature rise data of charging and/or electric discharge of the battery under different multiplying are measured, according to the charging and/or electric discharge
Temperature rise data calculate the heat power that the battery charges and/or discharged under different multiplying；
According to current value corresponding to the heat power for charging and/or discharging under the different multiplying, given birth to by curve matching
Relational expression between the heat power and current value of charging and/or the electric discharge of the battery.
Preferably, the temperature rise data of charging and/or electric discharge of the described measurement battery under different multiplying, fill according to described
Electricity and/or the temperature rise data of electric discharge calculate the heat power that the battery charges and/or discharged under different multiplying, including:
Measure the temperature rise data of charging and/or electric discharge of the battery under different multiplying under natural environment；
If the discharge time that the battery is discharged to blanking voltage under discharge-rate V is tv, then battery is in the electric discharge work
Average heat power P under conditionvIt is calculated as follows formula：
If the discharge time that the battery charges to blanking voltage under rate of charge U is tU, then battery is in the battery charger
Average heat power P under conditionUIt is calculated as follows formula：
Wherein, QconIt is battery outer surface and natural convection air heat exchange amount Qsurf, upper surface and natural convection air exchange heat
Measure QupSum, QradIt is battery surface to the Radiant exothermicity in the external world, QstoIt is the heat of battery itself storage；
Calculate average heat power of the battery under different discharge-rates and/or rate of charge.
Preferably, the current value according to corresponding to the heat power for charging and/or discharging under the different multiplying, leads to
The relational expression crossed between the heat power and current value of charging and/or electric discharge that curve matching generates the battery, including：
According to temperature rise data of the battery under different rate of charge, obtain each average raw under different rate of charge
Current value corresponding to thermal power, using heat power as ordinate, using current value as abscissa, in the ordinate and horizontal seat
Mark in the coordinate system formed and mark multiple points, each point corresponds to average heat power and average life under a rate of charge respectively
Current value corresponding to thermal power, battery heat power under the operating mode that charges is generated by curve matching according to the multiple point
Relational expression between charging current value；
And/or
According to temperature rise data of the battery under different discharge-rates, obtain each average raw under different discharge-rates
Current value corresponding to thermal power, using heat power as ordinate, using current value as abscissa, in the ordinate and horizontal seat
Mark in the coordinate system formed and mark multiple points, each point corresponds to average heat power and average life under a discharge-rate respectively
Current value corresponding to thermal power, battery heat under operating mode of discharging is generated by curve fitting algorithm according to the multiple point
Relational expression between power and discharge current value.
Preferably, described method also includes：
According to discharge time point corresponding to actual discharge current value of the battery under actual discharge operating mode, and it is described
Relational expression of the battery under operating mode of discharging between heat power and discharge current value, obtains the battery in the actual discharge work
Heat power and the relational expression between discharge time under condition；
And/or
The charging interval point according to corresponding to the battery in the actual charge current value actually to charge under operating mode, and it is described
Relational expression of the battery under the operating mode that charges between heat power and charging current value, obtains the battery in the actual battery charger
Heat power and the relational expression between the charging interval under condition.
Preferably, described method also includes：
By actual discharge electric current of the battery under actual discharge operating mode, battery heat under operating mode of discharging is substituted into
The relational expression of power and discharge current value, heat work(corresponding to the actual discharge electric current under the actual discharge operating mode is calculated
Rate；
And/or
By actual charge current of the battery under actually charging operating mode, battery heat under the operating mode that charges is substituted into
The relation curve of power and discharge current value, heat corresponding to the actual charge current under the actual charging operating mode is calculated
Power.
According to another aspect of the present invention, a kind of device for measuring the heat power of battery under time-dependent current operating mode, including：
Different multiplying temperature rise data measurement module, for measuring the temperature of charging and/or electric discharge of the battery under different multiplying
Rise data；
Different multiplying heat power computation module, for the temperature obtained according to the different multiplying temperature rise data measurement module
Rise data and calculate the heat power that the battery charges and/or discharged under different multiplying；
Heat power and current value relational expression acquisition module, for being obtained according to the different multiplying heat power computation module
Current value corresponding to the heat power for charging and/or discharging under the different multiplying arrived, the battery is generated by curve matching
Relational expression between the heat power and current value of charging and/or electric discharge.
Preferably, described different multiplying temperature rise data measurement module, for measuring battery different times under natural environment
The temperature rise data of charging and/or electric discharge under rate；
Described different multiplying heat power computation module, cut-off is discharged under discharge-rate V for setting the battery
The discharge time of voltage is tv, then average heat power P of the battery under the electric discharge operating modevIt is calculated as follows formula：
If the discharge time that the battery charges to blanking voltage under rate of charge U is tU, then battery is in the battery charger
Average heat power P under conditionUIt is calculated as follows formula：
Wherein, QconIt is battery outer surface and natural convection air heat exchange amount Qsurf, upper surface and natural convection air exchange heat
Measure QupSum, QradIt is battery surface to the Radiant exothermicity in the external world, QstoIt is the heat of battery itself storage；
Calculate average heat power of the battery under different discharge-rates and/or rate of charge.
Preferably, described heat power and current value relational expression acquisition module, for being filled according to the battery in difference
Temperature rise data under electric multiplying power, current value corresponding to each average heat power under different rate of charge is obtained, by heat work(
Using current value as abscissa, multiple points are marked in the coordinate system that the ordinate and abscissa are formed as ordinate for rate,
Each point corresponds to the average heat power under a rate of charge and current value averagely corresponding to heat power respectively, according to described
Multiple points generate relational expression of the battery under the operating mode that charges between heat power and charging current value by curve matching；
And/or
According to temperature rise data of the battery under different discharge-rates, obtain each average raw under different discharge-rates
Current value corresponding to thermal power, using heat power as ordinate, using current value as abscissa, in the ordinate and horizontal seat
Mark in the coordinate system formed and mark multiple points, each point corresponds to average heat power and average life under a discharge-rate respectively
Current value corresponding to thermal power, battery heat under operating mode of discharging is generated by curve fitting algorithm according to the multiple point
Relational expression between power and discharge current value.
Preferably, described device also includes：
Heat power and time history form acquisition module, for actually the putting under actual discharge operating mode according to the battery
Discharge time point corresponding to electric current value, and pass of the battery under operating mode of discharging between heat power and discharge current value
It is formula, obtains the battery heat power and relational expression between discharge time under the actual discharge operating mode；
And/or
The charging interval point according to corresponding to the battery in the actual charge current value actually to charge under operating mode, and it is described
Relational expression of the battery under the operating mode that charges between heat power and charging current value, obtains the battery in the actual battery charger
Heat power and the relational expression between the charging interval under condition.
Preferably, described device also includes：
Actual condition heat power computation module, for the actual discharge electricity by the battery under actual discharge operating mode
Stream, substitutes into battery relational expression of heat power and discharge current value under operating mode of discharging, the actual discharge is calculated
Heat power corresponding to actual discharge electric current under operating mode；
And/or
By actual charge current of the battery under actually charging operating mode, battery heat under the operating mode that charges is substituted into
The relation curve of power and discharge current value, heat corresponding to the actual charge current under the actual charging operating mode is calculated
Power.
The embodiment of the present invention is existed by measuring battery it can be seen from the technical scheme provided by embodiments of the invention described above
Temperature rise data under different multiplying, and calculate the heat power under different multiplying, so obtain heat power and current value it
Between relational expression.Realizing only needs to carry out temperature rise data test of the simple battery under fixed multiplying power, according to test result
Carry out theoretical calculation and can be obtained by battery under the operating current operating mode of change, heat power and the pass between electric current and time
It is formula, test equipment is simple, convenient to carry out, and cost is low, there is provided charge, discharged under a kind of effectively measuring time-dependent current operating mode
The scheme of the heat power of battery in journey.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, required use in being described below to embodiment
Accompanying drawing be briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for this
For the those of ordinary skill of field, without having to pay creative labor, other can also be obtained according to these accompanying drawings
Accompanying drawing.
Fig. 1 is the place of the method for the heat power of battery under a kind of measurement time-dependent current operating mode that the embodiment of the present invention one provides
Manage flow chart；
Fig. 2 is a kind of outline structural diagram for lithium battery that the embodiment of the present invention one provides；
Fig. 3 is a kind of some electric current of lithium battery monomer under actual condition of the offer of the embodiment of the present invention two with the time
Change schematic diagram；
Fig. 4, which is that the relational expression between a kind of heat power P that the embodiment of the present invention two provides and discharge current I is corresponding, to close
It is curve synoptic diagram；
A kind of heat power for some lithium battery monomer finally calculated that Fig. 5 embodiment of the present invention two provides is with the time
Change curve schematic diagram；
Fig. 6 is the tool of the device of the heat power of battery under a kind of measurement time-dependent current operating mode that the embodiment of the present invention three provides
Body realizes structure, wherein, different multiplying temperature rise data measurement module 61, different multiplying heat power computation module 62, heat work(
Rate and current value relational expression acquisition module 63, heat power and time history form acquisition module 64, actual condition heat power meter
Calculate module 65.
Embodiment
For ease of the understanding to the embodiment of the present invention, done further by taking several specific embodiments as an example below in conjunction with accompanying drawing
Explanation, and each embodiment does not form the restriction to the embodiment of the present invention.
Embodiment one
In order to overcome the shortcomings of the difficulties such as the electrokinetic cell caloric value computational methods such as current lithium battery and testing cost costliness,
The embodiment of the present invention proposes a kind of battery under continually changing operating current operating mode, and heat power is with test electric current, time
Change computational methods.
Above-mentioned electrokinetic cell can be the electrokinetic cells such as lithium battery, lead-acid accumulator and cadmium-nickel storage cell, below with lithium electricity
Illustrate the embodiment of the present invention exemplified by pond.
This embodiment offers a kind of handling process such as Fig. 1 for measuring the method for the heat power of battery under time-dependent current operating mode
Shown including following processing step：
Step S110, the temperature rise data of charging and/or electric discharge of the lithium battery under different multiplying are measured.
Discharge-rate refers to battery and current value required for its rated capacity is released within the defined time, and rate of charge refers to electricity
Pond is filled with the current value required for its rated capacity within the defined time, and discharge-rate and rate of charge are equal on data value
The multiple of battery rated capacity, is generally represented with letter C.Nominal rating capacity such as battery is that 600mAh is 1C (1 multiplying power),
300mAh is then 0.5C, 6A (600mAh) be 10C. by that analogy.
The embodiment of the present invention measures lithium battery under large space free convection environment first, under different charge and discharge multiplying powers
Temperature rise data, a kind of outline structural diagram for lithium battery that the embodiment of the present invention one provides as shown in Fig. 2 in test process,
Computational accuracy is reduced in order to prevent the heat of lithium battery electric core from being conducted from battery core to experimental bench, lithium battery lower surface and experimental bench
Between to be isolated using heat-barrier material, charge and discharge multiplying power is needed according to charge and discharge electric current of the lithium battery under actual condition
Formulated, charge and discharge electric current of the lithium battery under actual condition need the minimum and maximum charge and discharge multiplying power tested it
Between.
A kind of corresponding relation such as table 1 below institute between charge and discharge multiplying power and temperature rise data provided in an embodiment of the present invention
Show, the charge and discharge multiplying power of test is not limited to the multiplying power in table, in the current range of covering lithium battery actual condition, to the greatest extent may be used
Charge and discharge multiplying power test more than the selection of energy：
Step S120, the lithium battery is calculated under different multiplying according to the temperature rise data of the charging and/or electric discharge
Charging and/or the heat power of electric discharge.
If the discharge time that the lithium battery is discharged to blanking voltage under discharge-rate V is tv, then lithium battery put at this
Average heat power P under electrician's conditionvIt is calculated as follows formula：
Formula 1
If the discharge time that the lithium battery charges to blanking voltage under rate of charge U is tU, then lithium battery filled at this
Average heat power P under electrician's conditionUIt is calculated as follows formula：
Formula 2
Wherein, QconIt is lithium battery outer surface and natural convection air heat exchange amount Qsurf, upper surface and natural convection air change
Heat QupSum,
Formula 3
Wherein, hsurfIt is NATURAL CONVECTION COEFFICIENT OF HEAT of the lithium battery outer surface to air, hupIt is lithium battery upper surface to sky
The NATURAL CONVECTION COEFFICIENT OF HEAT of gas, t are the battery testing time, Asurf、AupIt is the area of lithium battery outer surface, upper surface respectively,
TwIt is the temperature on lithium battery surface, T∞It is environment temperature.
QradIt is lithium battery surface to the Radiant exothermicity in the external world, QradCalculation formula it is as follows：
Formula 4
Wherein, AAlwaysIt is the gross area on lithium battery surface, ε is the radiance of battery container, and σ is this formula fence-Boltzmann
(Stefan-Boltzmann) constant.
QstoBe lithium battery itself storage heat, QstoCalculation formula it is as follows：
Qsto=CpM Δ T=CpM (Tw-T∞) formula 5
Wherein Cp is the specific heat capacity of lithium battery, and M is the quality of lithium battery.
According to above-mentioned formula 1-5, it is flat under different discharge-rates and/or rate of charge that the lithium battery can be calculated
Equal heat power.
So that 0.1C discharges as an example, illustrate the average heat power calculation algorithms under fixed charge and discharge multiplying power.Assuming that lithium battery
The discharge time that 0.1C is discharged to blanking voltage is t0.1, then average heat power P of the lithium battery under the electric discharge operating mode0.1's
It is calculated as follows formula：
Process is repeated the above, using above-mentioned formula 1 and 2, lithium battery can be calculated under different discharge-rates
Average heat power P0.2、P0.5、P1..., the average heat power P under different rate of charge-0.1、P-0.2、P-0.5、
P-1、……；
Step S130, the current value according to corresponding to the heat power for charging and/or discharging under the different multiplying, passes through song
Relation curve between the heat power and current value of charging and/or electric discharge that line fitting generates the lithium battery.
According to temperature rise data of the lithium battery under different rate of charge, obtain each average under different rate of charge
Current value corresponding to heat power.Using heat power as ordinate, using current value as abscissa, in the ordinate and horizontal stroke
Multiple points are marked in the coordinate system that coordinate is formed, each point corresponds to average heat power under a rate of charge and average respectively
Current value corresponding to heat power, lithium battery heat under the operating mode that charges is generated by curve matching according to the multiple point
Relational expression between power and charging current value, corresponding relation curve in coordinate system can be drawn out according to the relational expression；
And/or
According to temperature rise data of the lithium battery under different discharge-rates, obtain each average under different discharge-rates
Current value corresponding to heat power.Using heat power as ordinate, using current value as abscissa, in the ordinate and horizontal stroke
Multiple points are marked in the coordinate system that coordinate is formed, each point corresponds to average heat power under a discharge-rate and average respectively
Current value corresponding to heat power, the lithium battery is generated under operating mode of discharging by curve fitting algorithm according to the multiple point
Relational expression between heat power and discharge current value, it is bent that corresponding relation in coordinate system can be drawn out according to the relational expression
Line.
Above-mentioned curve fitting algorithm can include linear algorithm, multinomial algorithm, power function algorithm, exponential function algorithm or
Person's logarithmic function algorithm.But this several function is not limited to, as long as the mathematics of heat power and current relationship can correctly be given expression to
Form can.
For example relational expression of the lithium battery under the operating mode that charges between heat power and charging current value can be expressed as：
Pcha=fcha(I)；
Relational expression under operating mode of discharging between heat power and charging current value can be expressed as：：
Pdis=fdis(I)
In actual applications, the electric discharge according to corresponding to actual discharge current value of the lithium battery under actual discharge operating mode
Time point, and relational expression of the lithium battery under operating mode of discharging between heat power and discharge current value, institute can be obtained
State lithium battery heat power and relational expression between discharge time under the actual discharge operating mode；
And/or
The charging interval point according to corresponding to the lithium battery in the actual charge current value actually to charge under operating mode, Yi Jisuo
Relational expression of the lithium battery under the operating mode that charges between heat power and charging current value is stated, the lithium battery can be obtained described
Heat power and the relational expression between the charging interval under actual charging operating mode.
Step S140, the actual discharge electric current by the lithium battery under actual discharge operating mode, substitute into the lithium battery and exist
The relational expression of heat power and discharge current value under operating mode of discharging, can be calculated actually putting under the actual discharge operating mode
Heat power corresponding to electric current；
And/or
By actual charge current of the lithium battery under actually charging operating mode, the lithium battery is substituted under the operating mode that charges
The relation curve of heat power and discharge current value, it can calculate corresponding to the actual charge current under the actual charging operating mode
Heat power.
Embodiment two
Certain a kind of electric current of lithium battery monomer under actual condition that the embodiment provides changes with time schematic diagram
As shown in figure 3, to calculate certain above-mentioned lithium battery in the heat power of actual condition with the change of electric current, this can be first measured
Electric discharge temperature rise data under the different multiplying of lithium battery, measurement result is as described in Table 1：
Table 1
| time(s) | 0.5C | 1C | 2C |
| 120 | 26.87 | 26.17 | 26.23 |
| 240 | 26.90 | 26.17 | 26.27 |
| 360 | 26.97 | 26.30 | 28.43 |
| 480 | 27.03 | 27.03 | 31.83 |
| 600 | 27.17 | 27.77 | 34.67 |
| 900 | 27.50 | 29.33 | 39.43 |
| 1200 | 27.83 | 30.23 | 42.60 |
| 1500 | 28.07 | 30.80 | 44.90 |
| 1800 | 28.20 | 31.40 | 45.67 |
| 2100 | 28.30 | 31.90 | 47.73 |
| 2400 | 28.40 | 32.17 | |
| 2700 | 28.47 | 32.47 | |
| 3000 | 28.53 | 32.90 | |
| 3300 | 28.47 | 33.40 | |
| 3600 | 28.43 | 34.03 | |
| 3900 | 28.33 | 35.00 | |
| 4200 | 28.30 | ||
| 4500 | 28.33 | ||
| 4800 | 28.27 | ||
| 5100 | 28.30 | ||
| 5400 | 28.37 | ||
| 5700 | 28.40 | ||
| 6000 | 28.50 | ||
| 6300 | 28.57 | ||
| 6600 | 28.77 |
| 6900 | 29.03 | ||
| 7200 | 29.43 |
Using the data in above-mentioned table 1, the computational methods in above-described embodiment one calculate the life under different multiplying
Thermal power is as shown in table 2 below：
Table 2
Using the data in above-mentioned table 2, the heat power P and discharge current of the lithium battery can be obtained by curve matching
Relational expression between I is as follows：
P=0.0232I2+0.0421I+0.0032
The corresponding relation curve of relational expression between above-mentioned heat power P and discharge current I is as described in Figure 4.It will be somebody's turn to do in Fig. 3
The electric current of operating mode different time points substitutes into above-mentioned relation formula, you can the heat work(of some the lithium battery monomer finally calculated
Rate versus time curve schematic diagram is as shown in Figure 5.
Embodiment three
This embodiment offers a kind of device for measuring the heat power of battery under time-dependent current operating mode, and it implements structure
As shown in fig. 6, it can specifically include following module：
Different multiplying temperature rise data measurement module 61, for measuring charging and/or electric discharge of the battery under different multiplying
Temperature rise data；
Different multiplying heat power computation module 62, for what is obtained according to the different multiplying temperature rise data measurement module
Temperature rise data calculate the heat power that the battery charges and/or discharged under different multiplying；
Heat power and current value relational expression acquisition module 63, for according to the different multiplying heat power computation module
Current value corresponding to the heat power for charging and/or discharging under obtained different multiplying, the battery is generated by curve matching
Charging and/or electric discharge heat power and current value between relational expression.
Preferably, described different multiplying temperature rise data measurement module 62, for measuring battery difference under natural environment
The temperature rise data of charging and/or electric discharge under multiplying power；
Described different multiplying heat power computation module, cut-off is discharged under discharge-rate V for setting the battery
The discharge time of voltage is tv, then average heat power P of the battery under the electric discharge operating modevIt is calculated as follows formula：
If the discharge time that the battery charges to blanking voltage under rate of charge U is tU, then battery is in the battery charger
Average heat power P under conditionUIt is calculated as follows formula：
Wherein, QconIt is battery outer surface and natural convection air heat exchange amount Qsurf, upper surface and natural convection air exchange heat
Measure QupSum, QradIt is battery surface to the Radiant exothermicity in the external world, QstoIt is the heat of battery itself storage；
Calculate average heat power of the battery under different discharge-rates and/or rate of charge.
Preferably, described heat power and current value relational expression acquisition module 33, for according to the battery in difference
Temperature rise data under rate of charge, current value corresponding to each average heat power under different rate of charge is obtained, by heat
Power, using current value as abscissa, marks multiple as ordinate in the coordinate system that the ordinate and abscissa are formed
Point, each point correspond to the average heat power under a rate of charge and current value averagely corresponding to heat power respectively, according to
The multiple point generates relation of the battery under the operating mode that charges between heat power and charging current value by curve matching
Formula；
And/or
According to temperature rise data of the battery under different discharge-rates, obtain each average raw under different discharge-rates
Current value corresponding to thermal power, using heat power as ordinate, using current value as abscissa, in the ordinate and horizontal seat
Mark in the coordinate system formed and mark multiple points, each point corresponds to average heat power and average life under a discharge-rate respectively
Current value corresponding to thermal power, battery heat under operating mode of discharging is generated by curve fitting algorithm according to the multiple point
Relational expression between power and discharge current value.
Further, described device also includes：
Heat power and time history form acquisition module 64, for the reality according to the battery under actual discharge operating mode
Discharge time point corresponding to discharge current value, and the battery is under operating mode of discharging between heat power and discharge current value
Relational expression, obtain the battery heat power and relational expression between discharge time under the actual discharge operating mode；
And/or
The charging interval point according to corresponding to the battery in the actual charge current value actually to charge under operating mode, and it is described
Relational expression of the battery under the operating mode that charges between heat power and charging current value, obtains the battery in the actual battery charger
Heat power and the relational expression between the charging interval under condition.
Actual condition heat power computation module 65, for the actual discharge electricity by the battery under actual discharge operating mode
Stream, substitutes into battery relational expression of heat power and discharge current value under operating mode of discharging, the actual discharge is calculated
Heat power corresponding to actual discharge electric current under operating mode；
And/or
By actual charge current of the battery under actually charging operating mode, battery heat under the operating mode that charges is substituted into
The relation curve of power and discharge current value, heat corresponding to the actual charge current under the actual charging operating mode is calculated
Power.
The detailed process of the heat power of battery under time-dependent current operating mode is measured with before with the device of the embodiment of the present invention
It is similar to state embodiment of the method, here is omitted.
In summary, the embodiment of the present invention is by measuring temperature rise data of the battery under different multiplying, and calculates difference
Heat power under multiplying power, and then obtain the relational expression between heat power and current value.Realizing only needs to carry out simply
Temperature rise data test of the battery under fixed multiplying power, theoretical calculation is carried out according to test result and can be obtained by battery in change
Under operating current operating mode, heat power and the relational expression between electric current and time, test equipment is simple, convenient to carry out, and cost is low,
Provide a kind of scheme of the heat power of battery in charging, discharge process under effectively measuring time-dependent current operating mode.
The embodiment of the present invention can be converted to heat power and the relational expression between electric current and time relation curve, and will
Relation curve is graphically shown in coordinate system, can be that user is best understood under time-dependent current operating mode in charging, discharge process
The heat power and the variation relation between electric current and time of battery.
The method and apparatus of the embodiment of the present invention go for the various electrokinetic cells such as lithium battery.
One of ordinary skill in the art will appreciate that：Accompanying drawing is the schematic diagram of one embodiment, module in accompanying drawing or
Flow is not necessarily implemented necessary to the present invention.
As seen through the above description of the embodiments, those skilled in the art can be understood that the present invention can
Realized by the mode of software plus required general hardware platform.Based on such understanding, technical scheme essence
On the part that is contributed in other words to prior art can be embodied in the form of software product, the computer software product
It can be stored in storage medium, such as ROM/RAM, magnetic disc, CD, including some instructions are causing a computer equipment
(can be personal computer, server, either network equipment etc.) performs some of each embodiment of the present invention or embodiment
Method described in part.
Each embodiment in this specification is described by the way of progressive, identical similar portion between each embodiment
Divide mutually referring to what each embodiment stressed is the difference with other embodiment.Especially for device or
For system embodiment, because it is substantially similar to embodiment of the method, so describing fairly simple, related part is referring to method
The part explanation of embodiment.Apparatus and system embodiment described above is only schematical, wherein the conduct
The unit that separating component illustrates can be or may not be it is physically separate, can be as the part that unit is shown or
Person may not be physical location, you can with positioned at a place, or can also be distributed on multiple NEs.Can root
Factually border needs to select some or all of module therein realize the purpose of this embodiment scheme.Ordinary skill
Personnel are without creative efforts, you can to understand and implement.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, the change or replacement that can readily occur in,
It should all be included within the scope of the present invention.Therefore, protection scope of the present invention should be with scope of the claims
It is defined.
Claims (8)
- A kind of 1. method for measuring the heat power of battery under time-dependent current operating mode, it is characterised in that including：The temperature rise data of charging and/or electric discharge of the battery under different multiplying are measured, according to the charging and/or the temperature rise of electric discharge Data calculate the heat power that the battery charges and/or discharged under different multiplying；According to current value corresponding to the heat power for charging and/or discharging under the different multiplying, institute is generated by curve matching The relational expression between the heat power and current value of charging and/or the electric discharge of battery is stated,Wherein, the temperature rise data of charging and/or electric discharge of the described measurement battery under different multiplying, according to it is described charging and/ Or the temperature rise data of electric discharge calculate the heat power that the battery charges and/or discharged under different multiplying, including:Measure the temperature rise data of charging and/or electric discharge of the battery under different multiplying under natural environment；If the discharge time that the battery is discharged to blanking voltage under discharge-rate V is tv, then battery is under the electric discharge operating mode Average heat power PvIt is calculated as follows formula：If the discharge time that the battery charges to blanking voltage under rate of charge U is tU, then battery is under the charging operating mode Average heat power PUIt is calculated as follows formula：Wherein, QconIt is battery outer surface and natural convection air heat exchange amount Qsurf, upper surface and natural convection air heat exchange amount Qup Sum, QradIt is battery surface to the Radiant exothermicity in the external world, QstoIt is the heat of battery itself storage；Calculate average heat power of the battery under different discharge-rates and/or rate of charge.
- 2. the method for the heat power of battery under measurement time-dependent current operating mode according to claim 1, it is characterised in that described The current value according to corresponding to the heat power for charging and/or discharging under the different multiplying, generated by curve matching described in Relational expression between the heat power and current value of charging and/or the electric discharge of battery, including：According to temperature rise data of the battery under different rate of charge, each average heat work(under different rate of charge is obtained Current value corresponding to rate, using heat power as ordinate, using current value as abscissa, in the ordinate and abscissa structure Into coordinate system in mark multiple points, each point corresponds to average heat power and average heat work(under a rate of charge respectively Current value corresponding to rate, according to the multiple point by curve matching generate the battery under the operating mode that charges heat power with filling Relational expression between electric current value；And/orAccording to temperature rise data of the battery under different discharge-rates, each average heat work(under different discharge-rates is obtained Current value corresponding to rate, using heat power as ordinate, using current value as abscissa, in the ordinate and abscissa structure Into coordinate system in mark multiple points, each point corresponds to average heat power and average heat work(under a discharge-rate respectively Current value corresponding to rate, battery heat power under operating mode of discharging is generated by curve fitting algorithm according to the multiple point Relational expression between discharge current value.
- 3. the method for the heat power of battery under measurement time-dependent current operating mode according to claim 2, it is characterised in that described Method also include：According to discharge time point corresponding to actual discharge current value of the battery under actual discharge operating mode, and the battery Relational expression under operating mode of discharging between heat power and discharge current value, the battery is obtained under the actual discharge operating mode Heat power and the relational expression between discharge time；And/orThe charging interval point according to corresponding to the battery in the actual charge current value actually to charge under operating mode, and the battery Relational expression under the operating mode that charges between heat power and charging current value, the battery is obtained under the actual charging operating mode Heat power and the relational expression between the charging interval.
- 4. the method for the heat power of battery, its feature under the measurement time-dependent current operating mode according to any one of claims 1 to 3 It is, described method also includes：By actual discharge electric current of the battery under actual discharge operating mode, battery heat power under operating mode of discharging is substituted into With the relational expression of discharge current value, heat power corresponding to the actual discharge electric current under the actual discharge operating mode is calculated；And/orBy actual charge current of the battery under actually charging operating mode, battery heat power under the operating mode that charges is substituted into With the relation curve of discharge current value, heat work(corresponding to the actual charge current under the actual charging operating mode is calculated Rate.
- A kind of 5. device for measuring the heat power of battery under time-dependent current operating mode, it is characterised in that including：Different multiplying temperature rise data measurement module, for measuring the temperature rise number of charging and/or electric discharge of the battery under different multiplying According to；Different multiplying heat power computation module, for the temperature rise number obtained according to the different multiplying temperature rise data measurement module The heat power for charging and/or discharging under different multiplying according to the battery is calculated；Heat power and current value relational expression acquisition module, for what is obtained according to the different multiplying heat power computation module Current value corresponding to the heat power for charging and/or discharging under different multiplying, the charging of the battery is generated by curve matching And/or the relational expression between the heat power and current value of electric discharge,Wherein, described different multiplying temperature rise data measurement module, for measuring battery under different multiplying under natural environment Charging and/or the temperature rise data of electric discharge；Described different multiplying heat power computation module, blanking voltage is discharged under discharge-rate V for setting the battery Discharge time be tv, then average heat power P of the battery under the electric discharge operating modevIt is calculated as follows formula：If the discharge time that the battery charges to blanking voltage under rate of charge U is tU, then battery is under the charging operating mode Average heat power PUIt is calculated as follows formula：Wherein, QconIt is battery outer surface and natural convection air heat exchange amount Qsurf, upper surface and natural convection air heat exchange amount Qup Sum, QradIt is battery surface to the Radiant exothermicity in the external world, QstoIt is the heat of battery itself storage；Calculate average heat power of the battery under different discharge-rates and/or rate of charge.
- 6. the device of the heat power of battery under measurement time-dependent current operating mode according to claim 5, it is characterised in that：Described heat power and current value relational expression acquisition module, for the temperature according to the battery under different rate of charge Data are risen, obtain current value corresponding to each average heat power under different rate of charge, using heat power as ordinate, Using current value as abscissa, multiple points are marked in the coordinate system that the ordinate and abscissa are formed, each point is right respectively Current value corresponding to answering average heat power and the average heat power under a rate of charge, passes through song according to the multiple point Line fitting generates relational expression of the battery under the operating mode that charges between heat power and charging current value；And/orAccording to temperature rise data of the battery under different discharge-rates, each average heat work(under different discharge-rates is obtained Current value corresponding to rate, using heat power as ordinate, using current value as abscissa, in the ordinate and abscissa structure Into coordinate system in mark multiple points, each point corresponds to average heat power and average heat work(under a discharge-rate respectively Current value corresponding to rate, battery heat power under operating mode of discharging is generated by curve fitting algorithm according to the multiple point Relational expression between discharge current value.
- 7. the device of the heat power of battery under measurement time-dependent current operating mode according to claim 6, it is characterised in that described Device also include：Heat power and time history form acquisition module, for the actual discharge electricity according to the battery under actual discharge operating mode Discharge time point corresponding to flow valuve, and relation of the battery under operating mode of discharging between heat power and discharge current value Formula, obtain the battery heat power and relational expression between discharge time under the actual discharge operating mode；And/orThe charging interval point according to corresponding to the battery in the actual charge current value actually to charge under operating mode, and the battery Relational expression under the operating mode that charges between heat power and charging current value, the battery is obtained under the actual charging operating mode Heat power and the relational expression between the charging interval.
- 8. the device of the heat power of battery, its feature under the measurement time-dependent current operating mode according to any one of claim 5 to 7 It is, described device also includes：Actual condition heat power computation module, for the actual discharge electric current by the battery under actual discharge operating mode, generation Enter battery relational expression of heat power and discharge current value under operating mode of discharging, be calculated under the actual discharge operating mode Actual discharge electric current corresponding to heat power；And/orBy actual charge current of the battery under actually charging operating mode, battery heat power under the operating mode that charges is substituted into With the relation curve of discharge current value, heat work(corresponding to the actual charge current under the actual charging operating mode is calculated Rate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410784794.5A CN104569836B (en) | 2014-12-16 | 2014-12-16 | Method and device for measuring heat generation power of battery under variable current working condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410784794.5A CN104569836B (en) | 2014-12-16 | 2014-12-16 | Method and device for measuring heat generation power of battery under variable current working condition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104569836A CN104569836A (en) | 2015-04-29 |
| CN104569836B true CN104569836B (en) | 2017-11-17 |
Family
ID=53086359
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410784794.5A Active CN104569836B (en) | 2014-12-16 | 2014-12-16 | Method and device for measuring heat generation power of battery under variable current working condition |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104569836B (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016187842A1 (en) * | 2015-05-27 | 2016-12-01 | 华为技术有限公司 | Charging method and mobile terminal |
| CN105404710A (en) * | 2015-10-20 | 2016-03-16 | 奇瑞汽车股份有限公司 | Simulation design method for vehicle-mounted charging system of electric vehicle |
| CN105954680B (en) * | 2016-05-03 | 2019-09-03 | 北京新能源汽车股份有限公司 | Device and method for testing heat generation power of power battery |
| CN106885990A (en) * | 2016-09-21 | 2017-06-23 | 蔚来汽车有限公司 | Battery cycle life testing method based on ambient temperature |
| CN108344946B (en) * | 2017-01-22 | 2023-12-15 | 中国科学院空间应用工程与技术中心 | Battery calorific value testing method and battery calorific value testing device |
| CN106768492B (en) * | 2017-01-24 | 2019-04-12 | 上海空间电源研究所 | A kind of measurement method of space battery calorific value |
| CN106989848B (en) * | 2017-03-05 | 2019-06-18 | 南昌大学 | A method for estimating the instantaneous heat generation rate of soft-pack batteries |
| CN109669141A (en) * | 2018-12-18 | 2019-04-23 | 成都纵横大鹏无人机科技有限公司 | A kind of discharge test method, device and equipment |
| CN113359038A (en) * | 2021-02-23 | 2021-09-07 | 万向一二三股份公司 | Lithium ion battery discharge and connecting piece heat production verification method |
| CN113378379B (en) * | 2021-06-08 | 2024-04-26 | 华中科技大学 | Lithium battery thermal management design method, system, and terminal based on critical heat transfer coefficient |
| CN115932600B (en) * | 2022-12-21 | 2024-08-02 | 国广顺能(上海)能源科技有限公司 | Battery heating power prediction method, storage medium and electronic equipment |
| CN115980591B (en) * | 2023-01-17 | 2024-05-07 | 昆山金鑫新能源科技股份有限公司 | Discharging safety synchronous early warning method and system for power battery |
| CN116706294A (en) * | 2023-07-05 | 2023-09-05 | 宁波甬能新能源科技有限公司 | Battery temperature management method for energy storage system |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102116846B (en) * | 2011-01-04 | 2013-01-23 | 武汉理工大学 | Method for measuring energy efficiencies of storage batteries |
| CN102121973B (en) * | 2011-01-04 | 2012-11-07 | 武汉理工大学 | Method for testing net energy of electrical vehicle power battery |
| US8449998B2 (en) * | 2011-04-25 | 2013-05-28 | Lg Chem, Ltd. | Battery system and method for increasing an operational life of a battery cell |
| CN102944575A (en) * | 2012-11-30 | 2013-02-27 | 天津力神电池股份有限公司 | Lithium ion battery thermal performance testing method |
| CN103018682A (en) * | 2012-12-20 | 2013-04-03 | 惠州市亿能电子有限公司 | Thermal field testing and analytical processing method for battery system |
| KR101448760B1 (en) * | 2013-03-04 | 2014-10-10 | 현대자동차 주식회사 | Method of utilizing power transistor of fuel cell stack diagnostic system |
| JP2014204571A (en) * | 2013-04-05 | 2014-10-27 | 株式会社マキタ | Electric-powered apparatus system and battery pack |
| CN103612570B (en) * | 2013-09-04 | 2016-03-23 | 奇瑞新能源汽车技术有限公司 | A kind of Pure electric vehicle thermal management control system and control method thereof |
| CN103713012A (en) * | 2013-12-20 | 2014-04-09 | 天津力神电池股份有限公司 | Method for testing specific heat capacity of lithium ion battery |
-
2014
- 2014-12-16 CN CN201410784794.5A patent/CN104569836B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN104569836A (en) | 2015-04-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104569836B (en) | Method and device for measuring heat generation power of battery under variable current working condition | |
| US20210328449A1 (en) | Battery charging method and apparatus | |
| CN106532187B (en) | A kind of battery heating means based on cell health state | |
| CN107145628B (en) | A method for predicting the cycle life of lithium batteries based on an electrochemical-thermal coupled model | |
| Li et al. | Physics-based CFD simulation of lithium-ion battery under the FUDS driving cycle | |
| CN105891730B (en) | A kind of computational methods of automobile power cell capacity | |
| CN107478999B (en) | Method and device for predicting remaining effective life of battery | |
| CN104635166A (en) | Evaluation method for health status of lithium batteries based on battery management system | |
| CN104535933B (en) | Battery remaining capacity measuring method and system | |
| CN109613445B (en) | Method and device for estimating state of health of power battery | |
| CN113030742B (en) | Method, device and equipment for estimating battery capacity | |
| CN113488110B (en) | Electrochemical-thermal coupling model and model-based simulation method for large-capacity lithium batteries | |
| CN109614662B (en) | A method and system for determining the heat dissipation mode of a lithium battery pack in a thermal simulation experiment | |
| KR101665566B1 (en) | Apparatus and method for estimating battery's state of health | |
| Zhang et al. | Thermal modeling and cooling analysis of high-power lithium ion cells | |
| CN113835031B (en) | Information processing method, apparatus, electronic device and storage medium | |
| US10037395B2 (en) | Systems and methods for improving battery performance | |
| CN103427429A (en) | Real-time power distribution system and method of user-side distributed energy storage device | |
| CN109690335A (en) | Apparatus and method for processing battery cell voltage data | |
| CN112531689A (en) | Source network load storage coordination control capability assessment method and equipment of receiving-end power system | |
| TWI512647B (en) | Battery charging method | |
| CN110276120A (en) | An equivalent method for an all-vanadium redox flow battery energy storage system based on electrothermal coupling | |
| Fink et al. | Electrothermal and electrochemical modeling of lithium-ion batteries: 3D simulation with experimental validation | |
| CN118944249B (en) | A method, device, battery and storage medium for calculating remaining charging time | |
| CN113125981B (en) | Battery standing method, battery standing device, electronic equipment and storage medium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |