CN114122565B - Battery management system and device in low-temperature environment - Google Patents
Battery management system and device in low-temperature environment Download PDFInfo
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- CN114122565B CN114122565B CN202111328289.6A CN202111328289A CN114122565B CN 114122565 B CN114122565 B CN 114122565B CN 202111328289 A CN202111328289 A CN 202111328289A CN 114122565 B CN114122565 B CN 114122565B
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- battery
- temperature
- processing module
- low
- heating
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Links
- 238000010438 heat treatment Methods 0.000 claims abstract description 62
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 62
- 229910052744 lithium Inorganic materials 0.000 claims description 62
- 238000001514 detection method Methods 0.000 claims description 26
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 18
- 230000009466 transformation Effects 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 229910052799 carbon Inorganic materials 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- QHGJSLXSVXVKHZ-UHFFFAOYSA-N dilithium;dioxido(dioxo)manganese Chemical compound [Li+].[Li+].[O-][Mn]([O-])(=O)=O QHGJSLXSVXVKHZ-UHFFFAOYSA-N 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
- H01M10/63—Control systems
-
- 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 relates to a battery management system and a device in a low-temperature environment, wherein the system comprises a signal acquisition module, a data processing module and a heating processing module; the signal acquisition module is used for acquiring charge and discharge information and battery temperature information; the data processing module is used for judging whether to send a heating instruction according to the charge and discharge information and the battery temperature information; and the heating processing module is used for heating the battery after receiving the heating instruction. The battery management system and the device in the low-temperature environment reduce the production cost of the battery system.
Description
Technical Field
The present invention relates to the field of battery systems, and in particular, to a battery management system and device under a low-temperature environment.
Background
Because the intelligent automobile industry carries out carbon peak and carbon neutralization, many automobile manufacturing enterprises replace the original internal combustion engine drive with a motor drive and adopt a battery to supply power. In the prior art, the working environment temperature of most battery systems is-20 ℃ to 60 ℃, and even if part of battery systems can be charged and discharged at the working environment temperature of-50 ℃ to 60 ℃, the production cost is high and the battery systems are not suitable for large-scale manufacturing.
The prior art can also improve the performance of the battery system, such as the performance of a lithium manganate battery system, and the improved lithium manganate battery system can adapt to the working environment of minus 30 ℃, but has higher production cost and poorer recycling degree, and is not suitable for large-scale manufacturing.
Disclosure of Invention
In view of the foregoing, it is necessary to provide a battery management system and a device under a low-temperature environment, so as to solve the problem of high production cost of the battery system under the low-temperature environment in the prior art.
In order to solve the above problems, the present invention provides a battery management system in a low temperature environment, including a signal acquisition module, a data processing module, and a heating processing module;
the signal acquisition module is used for acquiring charge and discharge information and battery temperature information;
the data processing module is used for judging whether to send a heating instruction according to the charge and discharge information and the battery temperature information;
and the heating processing module is used for heating the battery after receiving the heating instruction.
Further, the data processing module comprises a charge and discharge information judging module, and the charge and discharge information judging module is used for judging whether the battery is in a charging state or a power supply state according to the charge and discharge information.
Further, the data processing module further comprises a charging state processing module and a power supply state processing module;
the charging state processing module is used for judging whether to send a heating instruction according to the battery temperature information when the battery is in a charging state;
and the power supply state processing module is used for judging whether the battery voltage detection is required according to the battery temperature information when the battery is in a power supply state, acquiring a detected battery voltage value if the battery voltage detection is required, and judging whether to send a heating instruction according to the battery voltage value.
Further, the charge state processing module comprises a temperature judging unit;
the temperature judging unit is used for not sending a heating instruction when the temperature of the battery is greater than or equal to a first preset value;
and when the temperature of the battery is smaller than a first preset value, sending a heating instruction.
Further, the power supply state processing module comprises a temperature and voltage judging unit;
the temperature and voltage judging unit is used for not detecting the battery voltage when the battery temperature is greater than a second preset value;
when the battery temperature is smaller than or equal to a second preset value, battery voltage detection is needed, and according to the detected battery voltage value, a battery SOC state is obtained, and if the battery SOC state is smaller than a set proportion, a heating instruction is sent.
The invention also provides a battery management device under the low-temperature environment, which comprises the battery management system under the low-temperature environment according to any one of the technical schemes.
Further, the device also comprises a voltage detection device and a temperature detection device;
the voltage detection device is used for detecting the voltage value of the battery;
the temperature detection device is used for detecting the temperature of the battery.
Further, the device also comprises a voltage transformation device, wherein the voltage transformation device is used for boosting and reducing voltage.
Further, the lithium titanate battery also comprises an external power supply, a high-capacity lithium titanate battery and a power lithium battery pack;
the external power supply is used for supplying power to the high-capacity lithium titanate battery, the power lithium battery pack and the device comprising the battery management system in a low-temperature environment when the battery is in a charging state;
the high-capacity lithium titanate battery is used for supplying power to a device comprising a battery management system in a low-temperature environment through a voltage transformation device when the battery is in a power supply state;
the power lithium battery pack is used for supplying power to an external power supply when the battery is in a power supply state.
Further, the device also comprises a protection element device and a heating device;
the protection element device is used for controlling the external power supply, the high-capacity lithium titanate battery and the power lithium battery pack to charge and discharge;
the heating device is used for heating the power lithium battery pack.
The beneficial effects of adopting the embodiment are as follows: according to the battery management system in the low-temperature environment, the battery is heated after the heating instruction is received by the heating processing module, so that the battery can normally work in the working environment below-20 ℃, and the production cost of the battery system is reduced.
Drawings
Fig. 1 is a block diagram of a battery management system in a low-temperature environment according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a battery management device in a low-temperature environment according to an embodiment of the present invention.
Detailed Description
Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form a part hereof, and together with the description serve to explain the principles of the invention, and are not intended to limit the scope of the invention.
The embodiment of the invention provides a battery management system in a low-temperature environment, which is shown in fig. 1 and comprises a signal acquisition module 110, a data processing module 120 and a heating processing module 130;
the signal acquisition module 110 is configured to acquire charge and discharge information and battery temperature information;
the data processing module 120 is configured to determine whether to send a heating instruction according to the charge and discharge information and the battery temperature information;
the heat treatment module 130 is configured to perform heat treatment on the battery after receiving the heating instruction.
It is understood that the charge and discharge information may be acquired by a sensor, a circuit, or the like capable of recognizing the charge and discharge condition of the battery, and the battery temperature information may be acquired by a sensor or the like capable of recognizing the battery temperature.
As a preferred embodiment, the data processing module includes a charge and discharge information judging module, where the charge and discharge information judging module is configured to judge whether the battery is in a charging state or a power supply state according to the charge and discharge information.
As a preferred embodiment, the data processing module further includes a charge state processing module and a power supply state processing module;
the charging state processing module is used for judging whether to send a heating instruction according to the battery temperature information when the battery is in a charging state;
and the power supply state processing module is used for judging whether the battery voltage detection is required according to the battery temperature information when the battery is in a power supply state, acquiring a detected battery voltage value if the battery voltage detection is required, and judging whether to send a heating instruction according to the battery voltage value.
It should be noted that, the battery system is divided into a charging state and a power supply state, and the processing modes corresponding to different states are different, so that the charging and discharging efficiency of the battery system can be greatly improved.
As a preferred embodiment, the state of charge processing module includes a temperature judgment unit;
the temperature judging unit is used for not sending a heating instruction when the temperature of the battery is greater than or equal to a first preset value;
and when the temperature of the battery is smaller than a first preset value, sending a heating instruction.
In a specific embodiment, the first preset value is 0 ℃, and when the temperature T of the battery is more than or equal to 0 ℃, the battery is in a general charging state and does not send a heating instruction;
when the temperature T of the battery is less than 0 ℃, the battery is in a low-temperature charging state, and a heating instruction is sent to heat the battery.
As a preferred embodiment, the power supply state processing module includes a temperature voltage judging unit;
the temperature and voltage judging unit is used for not detecting the battery voltage when the battery temperature is greater than a second preset value;
when the battery temperature is smaller than or equal to a second preset value, battery voltage detection is needed, and according to the detected battery voltage value, a battery SOC state is obtained, and if the battery SOC state is smaller than a set proportion, a heating instruction is sent.
In a specific embodiment, the second preset value is C ℃, C is more than or equal to 0 and less than or equal to 10, the set proportion is D percent, D is more than or equal to 50 and less than or equal to 100, and when the temperature of the battery is T & gtC ℃, the battery is in a general power supply state and no battery voltage detection is needed;
when the temperature of the battery is below minus 20 ℃ and T is less than or equal to C ℃, the battery is in a low-temperature power supply state, battery voltage detection is needed, and according to the detected battery voltage value, a battery SOC state is obtained, and if the battery SOC state is smaller than a set proportion, a heating instruction is sent;
when the temperature of the battery is more than or equal to minus 50 ℃ and less than or equal to 20 ℃, the battery is in an ultralow temperature power supply state, a heating instruction is required to be sent to heat the battery, the battery is heated to be in a low temperature power supply state, and the battery is subjected to treatment when the battery is in the low temperature power supply state.
It is understood that the battery temperature refers to the battery temperature of the power lithium battery pack.
The embodiment of the invention provides a battery management device in a low-temperature environment, and a schematic diagram of the device is shown in fig. 2, wherein the battery management device in the low-temperature environment comprises a battery management system in the low-temperature environment according to any one of the technical schemes. It will be appreciated that the battery management system in the low temperature environment is a software system that can operate within the hardware system of the battery management device in the low temperature environment.
In one specific embodiment, the battery management system in the low temperature environment operates within the BMS management system 10.
As a preferred embodiment, the battery management device in a low temperature environment further includes a voltage detection device 20 and a temperature detection device 30;
the voltage detection device 20 is used for detecting the voltage value of the battery;
the temperature detecting device 30 is used for detecting the temperature of the battery.
As a preferred embodiment, the battery management device in a low temperature environment further includes a voltage transformation device 40, and the voltage transformation device 40 is used for boosting and reducing voltage.
As a preferred embodiment, the battery management device in a low temperature environment further includes an external power source 70, a high capacity lithium titanate battery 80 and a power lithium battery pack 90;
the external power supply 70 is used for supplying power to the high-capacity lithium titanate battery 80, the power lithium battery pack 90 and the devices including the battery management system in the low-temperature environment when the battery is in a charged state;
the high-capacity lithium titanate battery 80 is used for supplying power to a device comprising a battery management system in a low-temperature environment through the voltage transformation device 40 when the battery is in a power supply state;
the power lithium battery pack 90 is used to supply power to the external power source 70 when the battery is in a powered state.
In one specific embodiment, the device including the battery management system in the low temperature environment is the BMS management system 10.
As a preferred embodiment, the battery management device in a low temperature environment further includes a protection element device 50 and a heating device 60;
the protection element device 50 is used for controlling the external power supply 70, the high-capacity lithium titanate battery 80 and the power lithium battery pack 90 to charge and discharge;
the heating device 60 is used for heating the power lithium battery pack 90.
In a specific embodiment, the external power source 70 sends a charging signal, the battery is in a charging state, the BMS management system 10 is powered by the high-capacity lithium titanate battery 80 or the external power source 70, the BMS management system 10 controls the temperature detection device 30 to detect the battery temperature of the power lithium battery pack 90, when the battery temperature T of the power lithium battery pack 90 is greater than or equal to 0 ℃, the battery is in a general charging state, and the high-capacity lithium titanate battery 80 and the power lithium battery pack 90 are charged by the external power source 70 through the protection element device 50;
when the battery temperature T of the power lithium battery pack 90 is less than 0 ℃, the battery is in a low-temperature charging state, the external power supply 70 is used for charging the high-capacity lithium titanate battery 80 through the protection element device 50, the high-capacity lithium titanate battery 80 is used for supplying power to the heating device 60, the heating device 60 is used for heating the power lithium battery pack 90, when the battery temperature of the power lithium battery pack 90 reaches A ℃, the temperature is more than or equal to 0 and less than or equal to A <5, the external power supply 70 is used for charging the power lithium battery pack 90 through the protection element device 50, and when the battery temperature of the power lithium battery pack 90 reaches B ℃, the temperature is more than or equal to 5 and less than or equal to 25, the heating of the power lithium battery pack 90 is stopped.
In another specific embodiment, the external power supply 70 sends a discharging signal, the battery is in a power supply state, the high-capacity lithium titanate battery 80 is used for supplying power to the BMS management system 10 through the voltage transformation device 40, the BMS management system 10 controls the temperature detection device 30 to detect the battery temperature of the power lithium battery pack 90, when the battery temperature T of the power lithium battery pack 90 is greater than C ℃, the battery is in a general power supply state, and the power lithium battery pack 90 is used for supplying power to the external power supply 70 through the protection element device 50;
when the battery temperature of the power lithium battery pack 90 is minus 20 ℃ and less than or equal to C ℃, the battery is in a low-temperature power supply state, battery voltage detection needs to be carried out on the power lithium battery pack 90, the BMS management system 10 controls the voltage detection device 20 to detect the battery voltage value of the power lithium battery pack 90, the battery SOC state is obtained according to the detected battery voltage value, when the battery SOC state of the power lithium battery pack 90 is more than or equal to D%, the power lithium battery pack 90 is used for supplying power to the external power supply 70 through the protection element device 50, when the battery SOC state of the power lithium battery pack 90 is less than or equal to D%, the heating device 60 is used for heating the power lithium battery pack 90, when the battery temperature of the power lithium battery pack 90 is E ℃ and less than or equal to-10 and less than or equal to 0, the power lithium battery pack 90 is used for supplying power to the external power supply 70 through the protection element device 50, and when the battery temperature of the power lithium battery pack 90 is F ℃ and 0<F and less than or equal to 10, the heating of the power lithium battery pack 90 is stopped;
when the battery temperature of the power lithium battery pack 90 is minus 50 ℃ to minus 20 ℃, the battery is in an ultralow temperature power supply state, the power lithium battery pack 90 is heated by the heating device 60 until the battery temperature of the power lithium battery pack 90 is minus 20 ℃ to minus C ℃, and the steps when the battery temperature of the power lithium battery pack 90 is minus 20 ℃ to minus C are repeated.
It is understood that T represents the battery temperature of the power lithium battery pack 90.
In summary, the invention discloses a battery management system and a device under a low-temperature environment, wherein charge and discharge information and battery temperature information are acquired through a signal acquisition module, a data processing module judges whether to send a heating instruction according to the charge and discharge information and the battery temperature information, and the heating processing module carries out heating processing on a battery after receiving the heating instruction, so that the battery can normally work in a working environment below-20 ℃, and the production cost of a battery system is reduced.
The present invention is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention.
Claims (8)
1. The battery management system in the low-temperature environment is characterized by comprising a signal acquisition module, a data processing module and a heating processing module;
the signal acquisition module is used for acquiring charge and discharge information and battery temperature information;
the data processing module is used for judging whether to send a heating instruction according to the charge and discharge information and the battery temperature information;
the heating processing module is used for heating the battery after receiving the heating instruction;
the data processing module comprises a charge and discharge information judging module, wherein the charge and discharge information judging module is used for judging whether the battery is in a charge state or a power supply state according to the charge and discharge information;
the data processing module further comprises a charging state processing module and a power supply state processing module;
the charging state processing module is used for judging whether to send a heating instruction according to the battery temperature information when the battery is in a charging state;
and the power supply state processing module is used for judging whether the battery voltage detection is required according to the battery temperature information when the battery is in a power supply state, acquiring a detected battery voltage value if the battery voltage detection is required, and judging whether to send a heating instruction according to the battery voltage value.
2. The battery management system under a low-temperature environment according to claim 1, wherein the state-of-charge processing module includes a temperature judgment unit;
the temperature judging unit is used for not sending a heating instruction when the temperature of the battery is greater than or equal to a first preset value;
and when the temperature of the battery is smaller than a first preset value, sending a heating instruction.
3. The battery management system under a low-temperature environment according to claim 1, wherein the power supply state processing module includes a temperature-voltage judging unit;
the temperature and voltage judging unit is used for not detecting the battery voltage when the battery temperature is greater than a second preset value;
when the battery temperature is smaller than or equal to a second preset value, battery voltage detection is needed, and according to the detected battery voltage value, a battery SOC state is obtained, and if the battery SOC state is smaller than a set proportion, a heating instruction is sent.
4. A battery management apparatus in a low temperature environment, comprising the battery management system in a low temperature environment as claimed in any one of claims 1 to 3.
5. The battery management device in a low-temperature environment according to claim 4, further comprising a voltage detection device and a temperature detection device;
the voltage detection device is used for detecting the voltage value of the battery;
the temperature detection device is used for detecting the temperature of the battery.
6. The battery management device in a low temperature environment according to claim 4, further comprising a voltage transformation device for boosting and reducing voltage.
7. The battery management device in a low temperature environment according to claim 6, further comprising an external power source, a high capacity lithium titanate battery, and a power lithium battery pack;
the external power supply is used for supplying power to the high-capacity lithium titanate battery, the power lithium battery pack and the device comprising the battery management system in a low-temperature environment when the battery is in a charging state;
the high-capacity lithium titanate battery is used for supplying power to a device comprising a battery management system in a low-temperature environment through a voltage transformation device when the battery is in a power supply state;
the power lithium battery pack is used for supplying power to an external power supply when the battery is in a power supply state.
8. The battery management device in a low-temperature environment according to claim 7, further comprising a protection element device and a heating device;
the protection element device is used for controlling the external power supply, the high-capacity lithium titanate battery and the power lithium battery pack to charge and discharge;
the heating device is used for heating the power lithium battery pack.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111328289.6A CN114122565B (en) | 2021-11-10 | 2021-11-10 | Battery management system and device in low-temperature environment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111328289.6A CN114122565B (en) | 2021-11-10 | 2021-11-10 | Battery management system and device in low-temperature environment |
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| CN114122565B true CN114122565B (en) | 2024-03-29 |
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| CN114122565A (en) | 2022-03-01 |
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