CN112216904A - Self-heating device for charging and discharging battery and automobile - Google Patents
Self-heating device for charging and discharging battery and automobile Download PDFInfo
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- CN112216904A CN112216904A CN201910629023.1A CN201910629023A CN112216904A CN 112216904 A CN112216904 A CN 112216904A CN 201910629023 A CN201910629023 A CN 201910629023A CN 112216904 A CN112216904 A CN 112216904A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/615—Heating or keeping warm
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/657—Means for temperature control structurally associated with the cells by electric or electromagnetic means
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention provides a charging and discharging battery self-heating device, which comprises a charging and discharging battery, an IGBT module, a motor and a motor drive controller, wherein the charging and discharging battery is connected with the IGBT module; the IGBT module comprises three IGBT bridge arms connected in parallel, each IGBT bridge arm comprises two IGBT sub-modules connected in series, and each IGBT sub-module comprises an IGBT and a diode connected in reverse parallel; the three-phase alternating current output end of the motor is respectively connected between two IGBT sub-modules in each bridge arm; the motor driving controller is connected with the grid of each IGBT; the motor outputs three-phase alternating current in a preset current period loading mode, and generates high-frequency charging and discharging current to realize self-heating of the charging and discharging battery when the corresponding IGBT is switched on, and the IGBTs in the same IGBT bridge arm alternately participate in flow guiding work; the predetermined current cycle loading mode is that the current is loaded in 0-1/4 and 1/2-3/4 cycles but the direction is opposite, and the current is not loaded in 1/4-1/2 and 3/4-4/4 cycles. By implementing the invention, the self-heating of the charge-discharge battery is ensured, the current is reasonably distributed, the effective value of the IGBT participating in the flow guiding is reduced, and the power loss of the IGBT is reduced.
Description
Technical Field
The invention relates to the technical field of batteries and automobiles, in particular to a charging and discharging battery self-heating device and an automobile.
Background
The charge and discharge performance of charge and discharge batteries (such as lithium ion batteries) is greatly reduced in a low-temperature environment. In order to improve the low-temperature service performance, the charging and discharging battery needs to be heated under a low-temperature environment.
In the prior art, a related study has been made on the heat treatment of a charge and discharge battery in a low temperature environment. For example, in a charging and discharging battery heating method, a motor controller controls a motor inductor to repeatedly store energy and release energy, so that high-frequency alternating current is generated on a direct current bus, and current is distributed through an IGBT module, so that heating power is generated on the internal resistance of the battery, additional heating equipment is not needed, and the heating power is high.
However, in the existing charging and discharging battery heating method, because the IGBT module is formed by connecting three bridge arms in parallel, during the charging and discharging process, one part of the IGBTs in each bridge arm of the IGBT module participate in the flow guiding work, while the other part of the IGBTs do not participate in the flow guiding work, the IGBTs participating in the flow guiding work in a heating state for a long time, and the IGBTs not participating in the flow guiding work do not generate heat, so that the power of the IGBTs is lost.
Disclosure of Invention
The technical problem to be solved by the embodiments of the present invention is to provide a charging and discharging battery self-heating device and an automobile, which can ensure the charging and discharging battery self-heating and reasonably distribute current, and reduce the effective value of the IGBT participating in the flow guidance in the IGBT module, thereby achieving the purpose of reducing the power loss of the IGBT.
In order to solve the technical problem, an embodiment of the present invention provides a charging and discharging battery self-heating device, including a charging and discharging battery, an IGBT module, a motor, and a motor drive controller; the IGBT module comprises three IGBT bridge arms which are connected with two ends of the charge-discharge battery in parallel, each IGBT bridge arm comprises two IGBT sub-modules which are connected in series, and each IGBT sub-module comprises an IGBT and a diode which is connected with the IGBT in parallel in the reverse direction; a three-phase alternating current output end formed on the motor is respectively connected into three IGBT bridge arms and is connected between two IGBT sub-modules in each bridge arm; the motor driving controller is connected with the grid of the IGBT in each IGBT sub-module in each bridge arm;
the motor outputs three-phase alternating current in a preset current period loading mode, and when the motor drive controller controls the conduction of a corresponding IGBT in each IGBT submodule in each bridge arm, high-frequency charging and discharging current is generated to realize the self-heating of the charging and discharging battery, and the IGBTs on two IGBT submodules in the same IGBT bridge arm alternately participate in the flow guiding work to reduce the power loss of each IGBT; wherein the content of the first and second substances,
the predetermined current cycle loading mode is that the current is loaded in 0-1/4 and 1/2-3/4 cycles but the direction is opposite, and no current is loaded in 1/4-1/2 and 3/4-4/4 cycles.
Wherein, when positive current is loaded in 0-1/4 period, negative current is loaded in 1/2-3/4 period; or when negative current is applied in 0-1/4 cycle, positive current is applied in 1/2-3/4 cycle.
Wherein the forward current and the reverse current are equal in magnitude.
Wherein, the charge and discharge battery is a lithium battery.
Wherein the reduced power loss of each IGBT is 1/2.
The embodiment of the invention also provides an automobile which comprises the charging and discharging battery self-heating device.
The embodiment of the invention has the following beneficial effects:
the three-phase alternating current output by the motor is output in a preset current period loading mode (such as loading current in periods of 0-1/4 and 1/2-3/4 but opposite directions, and no current is loaded in periods of 1/4-1/2 and 3/4-4/4), so that the high-frequency charging and discharging current is ensured to meet self-heating of the charging and discharging battery, the current can be reasonably distributed, the effective value of the IGBT which participates in current guiding in the IGBT module is reduced, the power loss of the IGBT is reduced to be 1/2, and the service life of the IGBT is prolonged.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is within the scope of the present invention for a person skilled in the art to obtain other drawings based on the drawings without paying creative efforts.
Fig. 1 is a schematic circuit connection diagram of a charging/discharging battery self-heating device according to an embodiment of the present invention;
FIG. 2 shows a current i of a conventional predetermined current cycle loading manner for three-phase AC power of a motor in a self-heating device of a charging/discharging battery according to an embodiment of the present inventiondA schematic diagram; wherein a is positive current, and b is negative current;
FIG. 3 shows a current i used by a three-phase AC power of a motor in a self-heating device for charging and discharging a battery according to an embodiment of the present inventiondThe working principle diagram of an application scene of a traditional given current period loading mode;
FIG. 4 shows a current i used by a three-phase AC power of a motor in a self-heating device for charging and discharging a battery according to an embodiment of the present inventiondThe working principle diagram of another application scenario of the traditional given current period loading mode;
fig. 5 shows a current i of a three-phase ac power of a motor in a self-heating device for charging and discharging a battery according to an embodiment of the present invention, which is implemented in an improved current period loading mannerdSchematic representation.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.
The inventor has found that to generate high frequency ac power on the dc bus as shown in fig. 1, the motor drive controller M1 needs to control the IGBT modules to ensure that the high frequency ac power is generated while the motor M0 is free from vibration, i.e., the torque output approaches 0. For the vehicle-mounted motor M0, the output torque T iseAnd d, q axis currents Id、IqThe mathematical relationship of (1) is as follows:
wherein: n ispRepresents the number of pole pairs, Ld、LqRespectively representing d and q-axis equivalent inductances,. psifRepresenting the rotor permanent magnet flux linkage.
From the equation (1), to ensure a smaller output torque of the motor M0 and to satisfy the self-heating requirement of the charging and discharging battery U (generating high-frequency ac power on the dc bus), an ideal strategy at present is to make iq＝0， idThe high frequency changes to generate a high frequency alternating current on the direct current bus.
The ideal strategy described above is achieved by using the current i for the three-phase alternating current of the motor M0dThe conventional output of a given current periodic loading mode ensures three-phase alternating current i of the motor M0A、iB、iCIs changed in the direction of the current idThe same is true.
In FIG. 2, the current idIs a square wave with a constant amplitude and a period of 0.5 ms. Given current idThe constant positive value or the constant negative value is obtained in the whole process, and because the rotating speed of the motor M0 is 0, the partial inverse transformation and the Clark inverse transformation are carried out:
it can be derived that:
as shown in fig. 3 and 4, the operation principle of the charge/discharge battery self-heating device in fig. 1 will be described by taking one arm at the leftmost side of the IGBT module as an example. According to the current i shown in FIG. 2dGiven a scheme, when the three-phase current i of the motor M0AWhen the flow direction is the direction indicated by the arrow in fig. 3 (from right to left), that is, the charging and discharging battery U is in the charging process, the IGBT V1 and the diode D2 are always in the working state, and the IGBT V2 and the diode D1 do not participate in the working; when the three-phase current i of the motor M0AWhen the flow direction is the direction indicated by the arrow in fig. 4 (from left to right), that is, the charging and discharging battery U is in the discharging process, the IGBT V2 and the diode D1 are always in the working state, and the IGBT V1 and the diode D2 do not participate in the working.
Therefore, no matter the charging and discharging battery U is in a charging or discharging process, only the fixed IGBT and the fixed diode participate in the work of the same bridge arm, and the other IGBT and the fixed diode do not participate in the flow guiding work, so that only the IGBT and the diode participating in the flow guiding generate heat due to loss, the current loads of the IGBT and the diode in the IGBT module cannot be effectively balanced, the IGBT participating in the flow guiding is in a heat-generating state for a long time, and the IGBT not participating in the work does not generate heat, so that the power loss of the IGBT is caused.
Therefore, in the first embodiment of the present invention, the inventor proposes a charging and discharging battery self-heating device, which includes a charging and discharging battery 1, an IGBT module 2, a motor 3, and a motor driving controller 4 as shown in fig. 1; the IGBT module 2 comprises three IGBT bridge arms 21 which are connected in parallel at two ends of the charge-discharge battery, each IGBT bridge arm comprises two IGBT sub-modules 221 which are connected in series, and each IGBT sub-module 221 comprises an IGBT (V1-V6) and diodes (D1-D6) which are connected in parallel in an opposite direction; a three-phase alternating current output end formed on the motor 3 is respectively connected into three IGBT bridge arms 21 and is connected between two IGBT sub-modules 221 in each bridge arm 21; the motor driving controller 3 is connected with the grid of the IGBT in each IGBT submodule 221 in each bridge arm 21;
the motor 3 outputs three-phase alternating current in a preset current period loading mode, and when the motor drive controller 4 controls the corresponding IGBT in each IGBT submodule 221 in each bridge arm 21 to be switched on, high-frequency charging and discharging current is generated to realize self-heating of the charging and discharging battery 1, and the IGBTs on two IGBT submodules 221 in the same IGBT bridge arm 21 alternately participate in flow guiding work to reduce the power loss of each IGBT; wherein the content of the first and second substances,
the predetermined current cycle loading manner is that the current is loaded in 0-1/4 and 1/2-3/4 cycles but the direction is opposite, and no current is loaded in 1/4-1/2 and 3/4-4/4 cycles.
In the first embodiment of the present invention, when a positive current is applied for 0-1/4 cycles, a negative current is applied for 1/2-3/4 cycles, as shown in FIG. 5; or when negative current is loaded in 0-1/4 period, positive current is loaded in 1/2-3/4 period; wherein the forward current and the reverse current have equal amplitude; the charge-discharge battery 1 is a lithium battery; the reduced power loss for each IGBT is 1/2.
Taking the leftmost arm 221 of the IGBT module 2 as an example and the modified current i in fig. 5dThe operation principle of the self-heating device for charging and discharging batteries in fig. 1, that is, the operation principle of the self-heating device for charging and discharging batteries in the first embodiment of the present invention, will be described.
Within a period of 0-1/4 (namely 0-t 1), the three-phase current iAThe flow direction is the direction shown by the arrow in the figure 3 (from right to left), and within 1/2-3/4 periods (i.e. t 2-t 3), the three-phase current iAThe flow direction is the direction of the arrow in FIG. 4 (from left to right), and three-phase currents in the periods of 1/4-1/2 (i.e., t 1-t 2) and 3/4-4/4 (i.e., t 3-t 4)iAAnd the value is 0, namely no current is loaded, so that the two IGBTs (V1 and V2) and the two diodes (D1 and D2) of the same bridge arm all participate in the work in the whole period (0-t 4).
Assuming a given current idIf the amplitude is I, the given current I in the whole period is adopteddFor an IGBT which participates in the current conduction in the same direction (as shown in FIG. 2), the effective value is Im, and a given current i is improveddWhen the effective value of the current of the same IGBT participating In the current guiding is In (as shown In FIG. 5), the current can be obtained
Assuming that the on-resistance of the IGBT is r, when Im、InThe power losses occurring at the IGBT are respectively
Namely, it is
The loss that same IGBT produced has effectually been reduced, when making to satisfy charge-discharge battery self-heating, can reduce the power loss of every IGBT to original 1/2, is favorable to prolonging IGBT's life.
The second embodiment of the present invention further provides an automobile including the charging and discharging battery self-heating device in the first embodiment of the present invention, and the charging and discharging battery self-heating device in the first embodiment of the present invention has the same structure and connection relationship as the charging and discharging battery self-heating device in the first embodiment of the present invention, and implements the same function.
The embodiment of the invention has the following beneficial effects:
the three-phase alternating current output by the motor is output in a preset current period loading mode (such as loading current in periods of 0-1/4 and 1/2-3/4 but opposite directions, and no current is loaded in periods of 1/4-1/2 and 3/4-4/4), so that the high-frequency charging and discharging current is ensured to meet self-heating of the charging and discharging battery, the current can be reasonably distributed, the effective value of the IGBT which participates in current guiding in the IGBT module is reduced, the power loss of the IGBT is reduced to be 1/2, and the service life of the IGBT is prolonged.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the invention is not limited by the scope of the appended claims.
Claims (6)
1. A self-heating device for a charge-discharge battery comprises the charge-discharge battery, an IGBT module, a motor and a motor drive controller; the IGBT module comprises three IGBT bridge arms which are connected with two ends of the charge-discharge battery in parallel, each IGBT bridge arm comprises two IGBT sub-modules which are connected in series, and each IGBT sub-module comprises an IGBT and a diode which is connected with the IGBT in parallel in the reverse direction; a three-phase alternating current output end formed on the motor is respectively connected into three IGBT bridge arms and is connected between two IGBT sub-modules in each bridge arm; the motor driving controller is connected with the grid of the IGBT in each IGBT sub-module in each bridge arm;
the self-heating charging and discharging device is characterized in that the motor outputs three-phase alternating current in a preset current period loading mode, and when the motor driving controller controls the corresponding IGBT in each IGBT submodule in each bridge arm to be switched on, high-frequency charging and discharging current is generated to realize the self-heating of the charging and discharging battery, and the IGBTs on the two IGBT submodules in the same IGBT bridge arm alternately participate in the flow guiding work to reduce the power loss of each IGBT; wherein the content of the first and second substances,
the predetermined current cycle loading mode is that the current is loaded in 0-1/4 and 1/2-3/4 cycles but the direction is opposite, and no current is loaded in 1/4-1/2 and 3/4-4/4 cycles.
2. The self-heating device for charging/discharging battery as claimed in claim 1, wherein when a positive current is applied for 0-1/4 cycles, a negative current is applied for 1/2-3/4 cycles; or when negative current is applied in 0-1/4 cycle, positive current is applied in 1/2-3/4 cycle.
3. The charging-discharging battery self-heating device according to claim 2, wherein the magnitude of the forward current and the reverse current are equal.
4. The charging and discharging battery self-heating device according to claim 1, wherein the charging and discharging battery is a lithium battery.
5. The charging-discharging battery self-heating device according to claim 1, wherein each IGBT reduces power loss of 1/2.
6. An automobile, characterized by comprising the charging and discharging battery self-heating device according to any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910629023.1A CN112216904A (en) | 2019-07-12 | 2019-07-12 | Self-heating device for charging and discharging battery and automobile |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910629023.1A CN112216904A (en) | 2019-07-12 | 2019-07-12 | Self-heating device for charging and discharging battery and automobile |
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| CN201910629023.1A Pending CN112216904A (en) | 2019-07-12 | 2019-07-12 | Self-heating device for charging and discharging battery and automobile |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013097961A (en) * | 2011-10-31 | 2013-05-20 | Toyota Motor Corp | Temperature control device for battery and vehicle |
| CN104538701A (en) * | 2014-11-28 | 2015-04-22 | 富奥汽车零部件股份有限公司 | Battery heating structure built into motor driven system, and method thereof |
| CN105762434A (en) * | 2016-05-16 | 2016-07-13 | 北京理工大学 | Power supply system with self-heating function and vehicle |
| CN109823234A (en) * | 2019-04-23 | 2019-05-31 | 上海汽车集团股份有限公司 | A kind of control method of drive system, drive system and new-energy automobile |
-
2019
- 2019-07-12 CN CN201910629023.1A patent/CN112216904A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013097961A (en) * | 2011-10-31 | 2013-05-20 | Toyota Motor Corp | Temperature control device for battery and vehicle |
| CN104538701A (en) * | 2014-11-28 | 2015-04-22 | 富奥汽车零部件股份有限公司 | Battery heating structure built into motor driven system, and method thereof |
| CN105762434A (en) * | 2016-05-16 | 2016-07-13 | 北京理工大学 | Power supply system with self-heating function and vehicle |
| CN109823234A (en) * | 2019-04-23 | 2019-05-31 | 上海汽车集团股份有限公司 | A kind of control method of drive system, drive system and new-energy automobile |
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Effective date of registration: 20220106 Address after: 511434 No. 36, Longying Road, Shilou Town, Panyu District, Guangzhou City, Guangdong Province Applicant after: GAC AIAN New Energy Vehicle Co.,Ltd. Address before: 23rd floor, Chengyue building, No. 448-458, Dongfeng Middle Road, Yuexiu District, Guangzhou City, Guangdong Province 510030 Applicant before: GUANGZHOU AUTOMOBILE GROUP Co.,Ltd. |
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Application publication date: 20210112 |