CN108459277A - A kind of acquisition methods, device and the measuring apparatus of electrical connection internal resistance - Google Patents

A kind of acquisition methods, device and the measuring apparatus of electrical connection internal resistance Download PDF

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Publication number
CN108459277A
CN108459277A CN201810413417.9A CN201810413417A CN108459277A CN 108459277 A CN108459277 A CN 108459277A CN 201810413417 A CN201810413417 A CN 201810413417A CN 108459277 A CN108459277 A CN 108459277A
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internal resistance
inflection point
resistance
point data
data
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CN108459277B (en
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赵亮
穆宝
黄荣
陈宇
杨重科
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Beijing Electric Vehicle Co Ltd
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Beijing Electric Vehicle Co Ltd
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/389Measuring internal impedance, internal conductance or related variables

Abstract

The present invention provides a kind of acquisition methods, device and the measuring apparatus of electrical connection internal resistance, wherein the acquisition methods for being electrically connected internal resistance include:Obtain the first DC internal resistance of battery system;First DC internal resistance includes the first ohmic internal resistance and the first polarization resistance;According to the first polarization resistance, the second DC internal resistance of the battery core in battery system is obtained;Second DC internal resistance includes the second ohmic internal resistance;According to the first ohmic internal resistance and the second ohmic internal resistance, the electrical connection internal resistance of battery system is obtained.This programme can realize indirectly measurement, uncap without battery pack, do not have to electricity piece and disassemble;And not the acquisition of electrical connection internal resistance is directly carried out using the internal resistance value of some battery core, eliminate battery core internal resistance consistency influences caused by measurement result, ensure that accuracy of measurement;Meanwhile the measurement result in this programme not only includes the internal resistance of electrical fitting itself, also includes the contact internal resistance of electricity piece, further improves accuracy of measurement height.

Description

A kind of acquisition methods, device and the measuring apparatus of electrical connection internal resistance
Technical field
The present invention relates to field of measuring technique, particularly relate to a kind of acquisition methods, device and the measurement of electrical connection internal resistance Equipment.
Background technology
Currently, electrical connection internal resistance accounts for the significant proportion of the total internal resistance of electrokinetic cell system, electrical connection internal resistance includes electricity Connection resistance between core-battery core, the connection resistance between module-module, electric fittings resistance, high-voltage wiring harness resistance etc. are directly right It measures relatively difficult;Also a kind of measurement method is to measure total internal resistance of battery system, then measure the internal resistance of battery core, is pressed According to electrical connection internal resistance required result is obtained equal to the relationship of the difference of the total internal resistance of electrokinetic cell system and the total internal resistance of battery core.But It is the presence of problem in this way:The internal resistance distribution discreteness of battery core is bigger, and the internal resistance measurement result of the battery core exemplar of finite number is difficult To represent the level of all battery core internal resistances in entire battery system, obtained result can cover the actual value of electrical connection internal resistance, The value of the electrical connection internal resistance obtained is inaccurate.
Invention content
The purpose of the present invention is to provide a kind of acquisition methods, device and the measuring apparatus of electrical connection internal resistance, solve existing There is the problem for the measurement result inaccuracy that internal resistance is electrically connected in technology.
In order to solve the above-mentioned technical problem, the embodiment of the present invention provides a kind of acquisition methods of electrical connection internal resistance, including:
Obtain the first DC internal resistance of battery system;First DC internal resistance includes the first ohmic internal resistance and the first polarization Internal resistance;
According to first polarization resistance, the second DC internal resistance of the battery core in battery system is obtained;Second direct current Internal resistance includes the second ohmic internal resistance;
According to first ohmic internal resistance and the second ohmic internal resistance, the electrical connection internal resistance of battery system is obtained.
Optionally, the step of first DC internal resistance for obtaining battery system includes:
The predetermined DC pulse for applying the first preset duration to battery system, obtains first voltage response data;
Obtain first inflection point data, second inflection point data and the third inflection point in the first voltage response data Data;
According to the electric current of the predetermined DC pulse, first inflection point data and second inflection point data, described is obtained One ohmic internal resistance;
According to the electric current of the predetermined DC pulse, second inflection point data and third inflection point data, described is obtained One polarization resistance;
Wherein, first voltage response data includes time point and voltage value corresponding with time point.
Optionally, described according to first polarization resistance, obtain the second DC internal resistance of the battery core in battery system Step includes:
Default battery core into battery system applies the predetermined DC pulse of the first preset duration, obtains second voltage response Data;
Obtain first inflection point data, second inflection point data and the third inflection point in the second voltage response data Data;
According to the electric current of the predetermined DC pulse, first inflection point data and second inflection point data, default electricity is obtained The third ohmic internal resistance of core;
According to the electric current of the predetermined DC pulse, second inflection point data and third inflection point data, default electricity is obtained The third polarization resistance of core;
According to first polarization resistance, third ohmic internal resistance and third polarization resistance, second ohmic internal resistance is obtained;
Wherein, second voltage response data includes time point and voltage value corresponding with time point.
Optionally, described according to first polarization resistance, third ohmic internal resistance and third polarization resistance, obtain described The step of two ohmic internal resistances includes:
Obtain the ratio between first polarization resistance and third polarization resistance;
According to the product of the third ohmic internal resistance and ratio, second ohmic internal resistance is obtained.
Optionally, described according to first ohmic internal resistance and the second ohmic internal resistance, obtain the electrical connection of battery system The step of internal resistance includes:
The difference between first ohmic internal resistance and the second ohmic internal resistance is obtained, the electrical connection internal resistance is obtained.
Optionally, the data when predetermined DC pulse starts correspond to first inflection point data, described default straight Stream pulse starts the data after the second preset duration and corresponds to second inflection point data, when the predetermined DC end-of-pulsing Data correspond to the third inflection point data;
Wherein, second preset duration in 0.001s between 0.1s.
The embodiment of the present invention additionally provides a kind of acquisition device of electrical connection internal resistance, including:
First acquisition module, the first DC internal resistance for obtaining battery system;First DC internal resistance includes first Ohmic internal resistance and the first polarization resistance;
First processing module, for according to first polarization resistance, obtaining the second direct current of the battery core in battery system Internal resistance;Second DC internal resistance includes the second ohmic internal resistance;
Second processing module, for according to first ohmic internal resistance and the second ohmic internal resistance, obtaining the electricity of battery system Gas connects internal resistance.
Optionally, first acquisition module includes:
First processing submodule, the predetermined DC pulse for applying the first preset duration to battery system obtain first Voltage responsive data;
First acquisition submodule, for obtain first inflection point data in the first voltage response data, second Inflection point data and third inflection point data;
Second processing submodule, for according to the electric current of the predetermined DC pulse, first inflection point data and second Inflection point data obtain first ohmic internal resistance;
Third handles submodule, for according to the electric current of the predetermined DC pulse, second inflection point data and third Inflection point data obtain first polarization resistance;
Wherein, first voltage response data includes time point and voltage value corresponding with time point.
Optionally, the first processing module includes:
Fourth process submodule applies the predetermined DC arteries and veins of the first preset duration for the default battery core into battery system Punching, obtains second voltage response data;
Second acquisition submodule, for obtain first inflection point data in the second voltage response data, second Inflection point data and third inflection point data;
5th processing submodule, for according to the electric current of the predetermined DC pulse, first inflection point data and second Inflection point data obtain the third ohmic internal resistance of default battery core;
6th processing submodule, for according to the electric current of the predetermined DC pulse, second inflection point data and third Inflection point data obtain the third polarization resistance of default battery core;
7th processing submodule, for according to first polarization resistance, third ohmic internal resistance and third polarization resistance, obtaining To second ohmic internal resistance;
Wherein, second voltage response data includes time point and voltage value corresponding with time point.
Optionally, the 7th processing submodule includes:
First acquisition unit, for obtaining the ratio between first polarization resistance and third polarization resistance;
First processing units are obtained for the product according to the third ohmic internal resistance and ratio in described second ohm Resistance.
Optionally, the Second processing module includes:
8th processing submodule is obtained for obtaining the difference between first ohmic internal resistance and the second ohmic internal resistance The electrical connection internal resistance.
Optionally, the data when predetermined DC pulse starts correspond to first inflection point data, described default straight Stream pulse starts the data after the second preset duration and corresponds to second inflection point data, when the predetermined DC end-of-pulsing Data correspond to the third inflection point data;
Wherein, second preset duration in 0.001s between 0.1s.
The embodiment of the present invention additionally provides a kind of measuring apparatus, including:The acquisition device of above-mentioned electrical connection internal resistance.
The above-mentioned technical proposal of the present invention has the beneficial effect that:
In said program, the acquisition methods for being electrically connected internal resistance pass through the first DC internal resistance for obtaining battery system; First DC internal resistance includes the first ohmic internal resistance and the first polarization resistance;According to first polarization resistance, battery is obtained Second DC internal resistance of the battery core in system;Second DC internal resistance includes the second ohmic internal resistance;According to described first ohm Internal resistance and the second ohmic internal resistance obtain the electrical connection internal resistance of battery system;It can realize indirectly measurement, be unwrapped without battery Lid does not have to electricity piece and disassembles;And not the acquisition that electrical connection internal resistance is directly carried out using the internal resistance value of some battery core, is excluded Battery core internal resistance consistency is influenced caused by measurement result, ensure that accuracy of measurement;Meanwhile the measurement result in this programme Not only include the internal resistance of electrical fitting itself, also includes the contact internal resistance of electricity piece, further improve accuracy of measurement height; In addition, this programme only need to battery core and battery system carry out it is simple measure can (for example being measured in laboratory), quick side Just, specific purpose tool is not needed, it is convenient to carry out.
Description of the drawings
Fig. 1 is the acquisition methods flow diagram of the electrical connection internal resistance of the embodiment of the present invention;
Fig. 2 is the 30s pulsed discharge curve synoptic diagrams of the default battery core of the embodiment of the present invention;
Fig. 3 is the 30s pulsed discharge curve synoptic diagrams of the battery system of the embodiment of the present invention;
Fig. 4 is the acquisition device structural schematic diagram of the electrical connection internal resistance of the embodiment of the present invention.
Specific implementation mode
To keep the technical problem to be solved in the present invention, technical solution and advantage clearer, below in conjunction with attached drawing and tool Body embodiment is described in detail.
The present invention in view of the prior art in electrical connection internal resistance measurement result inaccuracy problem, provide it is a kind of electrically The acquisition methods for connecting internal resistance, as shown in Figure 1, including:
Step 11:Obtain the first DC internal resistance of battery system;First DC internal resistance include the first ohmic internal resistance and First polarization resistance;
Step 12:According to first polarization resistance, second DC internal resistance of (all) battery cores in battery system is obtained; Second DC internal resistance includes the second ohmic internal resistance;
Step 13:According to first ohmic internal resistance and the second ohmic internal resistance, the electrical connection internal resistance of battery system is obtained.
The acquisition methods of the electrical connection internal resistance provided in an embodiment of the present invention are straight by obtain battery system first Flow internal resistance;First DC internal resistance includes the first ohmic internal resistance and the first polarization resistance;According to first polarization resistance, obtain To the second DC internal resistance of the battery core in battery system;Second DC internal resistance includes the second ohmic internal resistance;According to described One ohmic internal resistance and the second ohmic internal resistance obtain the electrical connection internal resistance of battery system;It can realize indirectly measurement, not electricity consumption Lid is unwrapped in pond, is not had to electricity piece and is disassembled;And not directly obtaining for electrical connection internal resistance is carried out using the internal resistance value of some battery core It takes, eliminate battery core internal resistance consistency influences caused by measurement result, ensure that accuracy of measurement;Meanwhile in this programme Measurement result not only includes the internal resistance of electrical fitting itself, also includes the contact internal resistance of electricity piece, further improves measurement Accuracy is high;In addition, this programme only needs to carry out simple measure to battery core and battery system (for example can to survey in laboratory Amount), it is efficient and convenient, specific purpose tool is not needed, it is convenient to carry out.
Wherein, the step of first DC internal resistance for obtaining battery system includes:It is default to apply first to battery system The predetermined DC pulse of duration, obtains first voltage response data;First obtained in the first voltage response data turns Point data, second inflection point data and third inflection point data;According to the electric current of the predetermined DC pulse, first inflection point number According to second inflection point data, obtain first ohmic internal resistance;According to the electric current of the predetermined DC pulse, second inflection point Data and third inflection point data, obtain first polarization resistance;Wherein, first voltage response data include time point and Voltage value corresponding with time point.
Concretely:The voltage value in first voltage response data in first inflection point data is obtained to respond with first voltage The difference between voltage value in data in second inflection point data, then obtain between the difference and the electric current of predetermined DC pulse Ratio, which is the first ohmic internal resistance;
Obtain voltage value in first voltage response data in second inflection point data and in first voltage response data the The difference between voltage value in three inflection point data, then the ratio between the difference and the electric current of predetermined DC pulse is obtained, The ratio is the first polarization resistance.
Wherein, described according to first polarization resistance, obtain the step of the second DC internal resistance of the battery core in battery system Suddenly include:Default battery core into battery system applies the predetermined DC pulse of the first preset duration, obtains second voltage response Data;Obtain first inflection point data, second inflection point data and the third inflection point number in the second voltage response data According to;According to the electric current of the predetermined DC pulse, first inflection point data and second inflection point data, the of default battery core is obtained Three ohmic internal resistances;According to the electric current of the predetermined DC pulse, second inflection point data and third inflection point data, preset The third polarization resistance of battery core;According to first polarization resistance, third ohmic internal resistance and third polarization resistance, described is obtained Two ohmic internal resistances;Wherein, second voltage response data includes time point and voltage value corresponding with time point.
Concretely:The voltage value in second voltage response data in first inflection point data is obtained to respond with second voltage The difference between voltage value in data in second inflection point data, then obtain between the difference and the electric current of predetermined DC pulse Ratio, which is third ohmic internal resistance;
Obtain voltage value in second voltage response data in second inflection point data and in second voltage response data the The difference between voltage value in three inflection point data, then the ratio between the difference and the electric current of predetermined DC pulse is obtained, The ratio is third polarization resistance.
It is corresponding, it is described according to first polarization resistance, third ohmic internal resistance and third polarization resistance, obtain described The step of two ohmic internal resistances includes:Obtain the ratio between first polarization resistance and third polarization resistance;According to described The product of three ohmic internal resistances and ratio obtains second ohmic internal resistance.
Wherein, described according to first ohmic internal resistance and the second ohmic internal resistance, it obtains in the electrical connection of battery system The step of resistance includes:The difference between first ohmic internal resistance and the second ohmic internal resistance is obtained, is obtained in the electrical connection Resistance.
In the embodiment of the present invention, the data when predetermined DC pulse starts correspond to first inflection point data, institute It states predetermined DC pulse and starts the data after the second preset duration and correspond to second inflection point data, the predetermined DC pulse At the end of data correspond to the third inflection point data (the corresponding data of minimum voltage correspond to described at the end of concretely Third inflection point data);Wherein, second preset duration in 0.001s between 0.1s.
For the ease of measuring, first preset duration is in 5s between 120s.It is preferred that in 10s between 30s.
The acquisition methods of the electrical connection internal resistance provided in an embodiment of the present invention are further described below.
In view of the above technical problems, an embodiment of the present invention provides a kind of acquisition (measurement) battery systems to be electrically connected internal resistance Scheme, the program calculates in electrical connection indirectly by comparing the DC internal resistance of battery core and the DC internal resistance of battery system Resistance;Concrete example is as follows:
It is measured as basic calculation with the DC internal resistance of battery core and battery system and is electrically connected internal resistance.When measurement, to battery core or Person's battery system applies a DC pulse, and between 5s~120s, preferably 10s~30s is obtained the time range of DC pulse The voltage response curves of DC pulse extract ohmic internal resistance and polarization resistance information from voltage response curves.
The DC internal resistance of battery core includes ohmic internal resistance and polarization resistance two parts, since pulse (by taking 30s pulses as an example) Ohmic internal resistance Ro_cell is corresponded to the voltage drop part between 0.001s~0.1s, and A0 points are to the electricity between A1 points in corresponding diagram 2 Pressure, the voltage drop part of the minimum voltage (A2 points) when from A1 points to end-of-pulsing correspond to polarization resistance Rp_cell.Battery system DC internal resistance also include ohmic internal resistance and polarization resistance two parts, since pulse (by taking 30s pulses as an example) to 0.001s~ Voltage drop part between 0.1s corresponds to ohmic internal resistance Ro_pack, and the B0 points in corresponding diagram 3 are to the voltage between B1 points, from B1 The voltage drop part of minimum voltage (B2 points) when point is to end-of-pulsing corresponds to polarization resistance Rp_pack.
The internal resistance of battery system is made of battery core and electrical connection two parts, and wherein battery core had not only been contributed ohmic internal resistance but also contributed Polarization resistance, electrical connection only have ohmic internal resistance not have polarization resistance.Therefore, according to battery core and battery system in the embodiment of the present invention The respective ratio of ohmic internal resistance and polarization resistance of system relatively calculates electrical connection internal resistance:
(1) DC internal resistance for measuring battery core, decomposes ohmic internal resistance and polarization resistance, respectively Ro_cell and Rp_ Cell, concretely:
The voltage value that A1 points are subtracted using the voltage value of A0 points in Fig. 2, obtains the first difference, utilizes the first difference divided by arteries and veins Electric current is rushed, Ro_cell is obtained;
The voltage value that A2 points are subtracted using the voltage value of A1 points in Fig. 2, obtains the second difference, utilizes the second difference divided by arteries and veins Electric current is rushed, Rp_cell is obtained;
(2) DC internal resistance for measuring battery system, decomposes ohmic internal resistance and polarization resistance, respectively Ro_pack and Rp_ Pack, concretely;
The voltage value that B1 points are subtracted using the voltage value of B0 points in Fig. 3, obtains third difference, utilizes third difference divided by arteries and veins Electric current is rushed, Ro_pack is obtained;
The voltage value that B2 points are subtracted using the voltage value of B1 points in Fig. 3, obtains the 4th difference, utilizes the 4th difference divided by arteries and veins Electric current is rushed, Rp_pack is obtained;
(3) electrical connection internal resistance Re is calculated:
From the foregoing, it will be observed that scheme provided in an embodiment of the present invention proposes the DC internal resistance of battery core and battery system being decomposed into Europe Nurse internal resistance and polarization resistance two parts;Further, the ohmic internal resistance of battery system is divided into the total ohmic internal resistance and electricity of battery core The ohmic internal resistance of gas connection;It is proposed that the ohmic internal resistance of battery system is contributed by battery core and electrical connection two parts, and polarization resistance It is only contributed by battery core, therefore the electrical of battery system can be calculated by the ohmic internal resistance and polarization resistance of battery core and battery system and connected Connect internal resistance;Algorithm can also be embedded into battery management system by this programme by the laboratory measurement to battery core and battery system System software is realized that real-time online calculates, is not limited herein.
To sum up, scheme provided in an embodiment of the present invention can realize indirectly measurement, uncap without battery pack, not have to electrical Part is disassembled;The proportionate relationship of battery core ohmic internal resistance and polarization resistance is used, rather than directly uses internal resistance value, eliminates electricity In-core resistance consistency is influenced caused by result.Meanwhile measurement result may include not only the internal resistance of electrical fitting itself, also May include the contact internal resistance of electricity piece, accuracy is high;And this programme can carry out letter to battery core and battery system in laboratory It is single to measure, it is efficient and convenient, specific purpose tool is not needed, it is convenient to carry out.
The embodiment of the present invention additionally provides a kind of acquisition device of electrical connection internal resistance, as shown in figure 4, including:
First acquisition module 41, the first DC internal resistance for obtaining battery system;First DC internal resistance includes the One ohmic internal resistance and the first polarization resistance;
First processing module 42, for according to first polarization resistance, obtain the battery core in battery system second to be straight Flow internal resistance;Second DC internal resistance includes the second ohmic internal resistance;
Second processing module 43, for according to first ohmic internal resistance and the second ohmic internal resistance, obtaining battery system It is electrically connected internal resistance.
The acquisition device of the electrical connection internal resistance provided in an embodiment of the present invention is straight by obtain battery system first Flow internal resistance;First DC internal resistance includes the first ohmic internal resistance and the first polarization resistance;According to first polarization resistance, obtain To the second DC internal resistance of the battery core in battery system;Second DC internal resistance includes the second ohmic internal resistance;According to described One ohmic internal resistance and the second ohmic internal resistance obtain the electrical connection internal resistance of battery system;It can realize indirectly measurement, not electricity consumption Lid is unwrapped in pond, is not had to electricity piece and is disassembled;And not directly obtaining for electrical connection internal resistance is carried out using the internal resistance value of some battery core It takes, eliminate battery core internal resistance consistency influences caused by measurement result, ensure that accuracy of measurement;Meanwhile in this programme Measurement result not only includes the internal resistance of electrical fitting itself, also includes the contact internal resistance of electricity piece, further improves measurement Accuracy is high;In addition, this programme only needs to carry out simple measure to battery core and battery system (for example can to survey in laboratory Amount), it is efficient and convenient, specific purpose tool is not needed, it is convenient to carry out.
Wherein, first acquisition module includes:First processing submodule, when being used for default to battery system application first Long predetermined DC pulse, obtains first voltage response data;First acquisition submodule, for obtaining the first voltage response First inflection point data, second inflection point data in data and third inflection point data;Second processing submodule is used for basis The electric current of the predetermined DC pulse, first inflection point data and second inflection point data, obtain first ohmic internal resistance;The Three processing submodules, for according to the electric current of the predetermined DC pulse, second inflection point data and third inflection point data, obtaining To first polarization resistance;Wherein, first voltage response data includes time point and voltage value corresponding with time point.
Specifically, the first processing module includes:Fourth process submodule, for the default battery core into battery system The predetermined DC pulse for applying the first preset duration, obtains second voltage response data;Second acquisition submodule, for obtaining State first inflection point data, second inflection point data and the third inflection point data in second voltage response data;5th processing Submodule, for according to the electric current of the predetermined DC pulse, first inflection point data and second inflection point data, being preset The third ohmic internal resistance of battery core;6th processing submodule, for electric current, the second inflection point number according to the predetermined DC pulse According to third inflection point data, obtain the third polarization resistance of default battery core;7th processing submodule, for according to described first Polarization resistance, third ohmic internal resistance and third polarization resistance obtain second ohmic internal resistance;Wherein, second voltage number of responses According to including time point and voltage value corresponding with time point.
Corresponding, the 7th processing submodule includes:First acquisition unit, for obtain first polarization resistance with Ratio between third polarization resistance;First processing units are obtained for the product according to the third ohmic internal resistance and ratio Second ohmic internal resistance.
Wherein, the Second processing module includes:8th processing submodule, for obtaining first ohmic internal resistance and the Difference between two ohmic internal resistances obtains the electrical connection internal resistance.
In the embodiment of the present invention, the data when predetermined DC pulse starts correspond to first inflection point data, institute It states predetermined DC pulse and starts the data after the second preset duration and correspond to second inflection point data, the predetermined DC pulse At the end of data correspond to the third inflection point data;Wherein, second preset duration in 0.001s between 0.1s.
For the ease of measuring, first preset duration is in 5s between 120s.It is preferred that in 10s between 30s.
Wherein, the realization embodiment of the acquisition methods of above-mentioned electrical connection internal resistance is suitable for the electrical connection internal resistance Acquisition device embodiment in, can also reach identical technique effect.
The embodiment of the present invention additionally provides a kind of measuring apparatus, including:The acquisition device of above-mentioned electrical connection internal resistance.
Wherein, the realization embodiment of the acquisition device of above-mentioned electrical connection internal resistance is suitable for the reality of the measuring apparatus It applies in example, can also reach identical technique effect.
It should be noted that this many functional component described in this description is all referred to as module/submodule/unit, Specifically to emphasize the independence of its realization method.
In the embodiment of the present invention, module/submodule/unit can use software realization, so as to by various types of processors It executes.For example, one mark executable code module may include computer instruction one or more physics or Logical block, for example, it can be built as object, process or function.Nevertheless, the executable code of institute's mark module It needs not be physically located together, but may include the different instructions being stored in different positions, when in these command logics When being combined together, constitutes module and realize the regulation purpose of the module.
In fact, executable code module can be the either many item instructions of individual instructions, and can even be distributed It on multiple and different code segments, is distributed in distinct program, and is distributed across multiple memory devices.Similarly, it grasps Making data can be identified in module, and can be realized according to any form appropriate and be organized in any appropriate class In the data structure of type.The operation data can be collected as individual data collection, or can be distributed on different location (including in different storage device), and can only be present in system or network as electronic signal at least partly.
When module can utilize software realization, it is contemplated that the level of existing hardware technique, it is possible to implemented in software Module, in the case where not considering cost, those skilled in the art can build corresponding hardware circuit to realize correspondence Function, the hardware circuit includes conventional ultra-large integrated (VLSI) circuit or gate array and such as logic core The existing semiconductor of piece, transistor etc either other discrete elements.Module can also use programmable hardware device, such as The realizations such as field programmable gate array, programmable logic array, programmable logic device.
Above-described is the preferred embodiment of the present invention, it should be pointed out that the ordinary person of the art is come It says, under the premise of not departing from principle of the present invention, can also make several improvements and retouch, these improvements and modifications should also regard For protection scope of the present invention.

Claims (13)

1. a kind of acquisition methods of electrical connection internal resistance, which is characterized in that including:
Obtain the first DC internal resistance of battery system;First DC internal resistance includes in the first ohmic internal resistance and the first polarization Resistance;
According to first polarization resistance, the second DC internal resistance of the battery core in battery system is obtained;Second DC internal resistance Including the second ohmic internal resistance;
According to first ohmic internal resistance and the second ohmic internal resistance, the electrical connection internal resistance of battery system is obtained.
2. acquisition methods according to claim 1, which is characterized in that first DC internal resistance for obtaining battery system Step includes:
The predetermined DC pulse for applying the first preset duration to battery system, obtains first voltage response data;
Obtain first inflection point data, second inflection point data and the third inflection point number in the first voltage response data According to;
According to the electric current of the predetermined DC pulse, first inflection point data and second inflection point data, first Europe is obtained Nurse internal resistance;
According to the electric current of the predetermined DC pulse, second inflection point data and third inflection point data, first pole is obtained Change internal resistance;
Wherein, first voltage response data includes time point and voltage value corresponding with time point.
3. acquisition methods according to claim 2, which is characterized in that it is described according to first polarization resistance, obtain electricity The step of second DC internal resistance of the battery core in cell system includes:
Default battery core into battery system applies the predetermined DC pulse of the first preset duration, obtains second voltage number of responses According to;
Obtain first inflection point data, second inflection point data and the third inflection point number in the second voltage response data According to;
According to the electric current of the predetermined DC pulse, first inflection point data and second inflection point data, default battery core is obtained Third ohmic internal resistance;
According to the electric current of the predetermined DC pulse, second inflection point data and third inflection point data, default battery core is obtained Third polarization resistance;
According to first polarization resistance, third ohmic internal resistance and third polarization resistance, second ohmic internal resistance is obtained;
Wherein, second voltage response data includes time point and voltage value corresponding with time point.
4. acquisition methods according to claim 3, which is characterized in that described according to first polarization resistance, third Europe Nurse internal resistance and third polarization resistance, the step of obtaining second ohmic internal resistance include:
Obtain the ratio between first polarization resistance and third polarization resistance;
According to the product of the third ohmic internal resistance and ratio, second ohmic internal resistance is obtained.
5. acquisition methods according to claim 4, which is characterized in that described according to first ohmic internal resistance and the second Europe Nurse internal resistance, the step of obtaining the electrical connection internal resistance of battery system include:
The difference between first ohmic internal resistance and the second ohmic internal resistance is obtained, the electrical connection internal resistance is obtained.
6. acquisition methods according to claim 2 or 3, which is characterized in that the data when predetermined DC pulse starts Corresponding first inflection point data, the predetermined DC pulse start the data after the second preset duration and correspond to described second Inflection point data, the data when predetermined DC end-of-pulsing correspond to the third inflection point data;
Wherein, second preset duration in 0.001s between 0.1s.
7. a kind of acquisition device of electrical connection internal resistance, which is characterized in that including:
First acquisition module, the first DC internal resistance for obtaining battery system;First DC internal resistance includes first ohm Internal resistance and the first polarization resistance;
First processing module, for according to first polarization resistance, obtaining the second DC internal resistance of the battery core in battery system; Second DC internal resistance includes the second ohmic internal resistance;
Second processing module, for according to first ohmic internal resistance and the second ohmic internal resistance, obtaining the electrical of battery system and connecting Connect internal resistance.
8. acquisition device according to claim 7, which is characterized in that first acquisition module includes:
First processing submodule, the predetermined DC pulse for applying the first preset duration to battery system obtain first voltage Response data;
First acquisition submodule, for obtaining first inflection point data in the first voltage response data, second inflection point Data and third inflection point data;
Second processing submodule, for according to the electric current of the predetermined DC pulse, first inflection point data and second inflection point Data obtain first ohmic internal resistance;
Third handles submodule, for according to the electric current of the predetermined DC pulse, second inflection point data and third inflection point Data obtain first polarization resistance;
Wherein, first voltage response data includes time point and voltage value corresponding with time point.
9. acquisition device according to claim 8, which is characterized in that the first processing module includes:
Fourth process submodule applies the predetermined DC pulse of the first preset duration for the default battery core into battery system, Obtain second voltage response data;
Second acquisition submodule, for obtaining first inflection point data in the second voltage response data, second inflection point Data and third inflection point data;
5th processing submodule, for according to the electric current of the predetermined DC pulse, first inflection point data and second inflection point Data obtain the third ohmic internal resistance of default battery core;
6th processing submodule, for according to the electric current of the predetermined DC pulse, second inflection point data and third inflection point Data obtain the third polarization resistance of default battery core;
7th processing submodule, for according to first polarization resistance, third ohmic internal resistance and third polarization resistance, obtaining institute State the second ohmic internal resistance;
Wherein, second voltage response data includes time point and voltage value corresponding with time point.
10. acquisition device according to claim 9, which is characterized in that the described 7th, which handles submodule, includes:
First acquisition unit, for obtaining the ratio between first polarization resistance and third polarization resistance;
First processing units obtain second ohmic internal resistance for the product according to the third ohmic internal resistance and ratio.
11. acquisition device according to claim 10, which is characterized in that the Second processing module includes:
8th processing submodule obtains described for obtaining the difference between first ohmic internal resistance and the second ohmic internal resistance It is electrically connected internal resistance.
12. acquisition device according to claim 8 or claim 9, which is characterized in that the data when predetermined DC pulse starts Corresponding first inflection point data, the predetermined DC pulse start the data after the second preset duration and correspond to described second Inflection point data, the data when predetermined DC end-of-pulsing correspond to the third inflection point data;
Wherein, second preset duration in 0.001s between 0.1s.
13. a kind of measuring apparatus, which is characterized in that including:As claim 7 to 12 any one of them is electrically connected internal resistance Acquisition device.
CN201810413417.9A 2018-05-03 2018-05-03 Method and device for acquiring electrical connection internal resistance and measuring equipment Active CN108459277B (en)

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