CN105162236A - Composite energy power distribution system - Google Patents
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- CN105162236A CN105162236A CN201510627138.9A CN201510627138A CN105162236A CN 105162236 A CN105162236 A CN 105162236A CN 201510627138 A CN201510627138 A CN 201510627138A CN 105162236 A CN105162236 A CN 105162236A
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- 239000002131 composite material Substances 0.000 title claims abstract description 51
- 238000009826 distribution Methods 0.000 title claims abstract description 39
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 133
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 129
- 239000003990 capacitor Substances 0.000 claims abstract description 88
- 238000004891 communication Methods 0.000 claims abstract description 8
- 238000007599 discharging Methods 0.000 claims description 11
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- 238000011161 development Methods 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
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Abstract
The invention discloses a composite energy power distribution system, comprising a composite energy and a control device. The composite energy consists of a lithium battery group and a super capacitor module; the control device consists of a control unit, a first DC/DC converter and a second DC/DC converter; the lithium battery group is connected to the first DC/DC converter; the super capacitor module is connected to the second DC/DC converter; the first DC/DC converter is connected to the DC/DC converter and then both the first DC/DC converter and the second DC/DC converter are connected to a load; a control unit is connected to the lithium battery group, the super capacitor module, the first DC/DC converter, the second DC/DC converter and the load through a CAN communication network; the control unit obtains the power requirement of the load, the state data of the first DC/DC converter, the state data of the second DC/DC converter and the state data of the composite energy through the CAN communication network; the power distribution that is respectively born by the lithium battery group and the super capacitor module is calculated; and the power which is respectively born by the corresponding lithium battery group and the super capacitor module is controlled.
Description
Technical Field
The invention relates to a composite energy management technology, in particular to a composite energy power distribution system.
Background
The existing composite energy management system generally takes simple parallel connection as a main part and controls the on-off through some electronic switches, thereby achieving the control of composite energy. The composite energy system cannot regulate and control power distribution between the super capacitor and the lithium battery, and cannot make full use of the complementary advantages of the super capacitor and the lithium battery to form a more efficient and practical energy management system.
The national intellectual property office of the people's republic of China disclosed a patent application with the publication number of 203456930U, named as a composite energy system, in 2014, 2 month and 26 days. The composite energy system is composed of composite energy and a control system, a lithium battery pack and a super capacitor module of the composite energy are connected in parallel through some electronic switches, and then the control system controls the input and the output of the energy of the lithium battery pack and the super capacitor module by controlling the on-off of the electronic switches. In the patent application, the working voltages of the lithium battery pack and the super capacitor module of the composite energy are consistent, and the voltage deviation of the lithium battery pack and the super capacitor module is easy to cause and the service life of the lithium battery pack and the super capacitor module is influenced due to different characteristics of the lithium battery pack and the super capacitor module; power distribution cannot be performed, efficiency cannot be improved, and energy loss can be increased; in addition, the super capacitor is not fully utilized, the number of electronic components is large, and the structure is complex.
Disclosure of Invention
The invention provides a composite energy power distribution system, which is used for realizing fine control on power distribution of a lithium battery pack and a super capacitor module, protecting normal work of the lithium battery pack and the super capacitor module, improving working efficiency, reducing loss and prolonging service life.
In order to achieve the above object, an embodiment of the present invention provides a hybrid energy power distribution system, including: a hybrid energy and control device; the composite energy source consists of a lithium battery pack and a super capacitor module, and the control device consists of a control unit, a first DC/DC converter and a second DC/DC converter; wherein,
the lithium battery pack is connected with the first DC/DC converter, the super capacitor module is connected with the second DC/DC converter, and the first DC/DC converter and the second DC/DC converter are connected and then are connected to a load together; the control unit is respectively connected with the lithium battery pack, the super capacitor module, the first DC/DC converter, the second DC/DC converter and the load through a CAN communication network;
the control unit acquires the power requirement of the load, the state data of the first DC/DC converter, the state data of the second DC/DC converter and the state data of the composite energy source through a CAN communication network, calculates the power distribution required to be born by the lithium battery pack and the super capacitor module according to the power requirement of the load, the state data of the first DC/DC converter, the state data of the second DC/DC converter and the state data of the composite energy source, controls the first DC/DC converter and the second DC/DC converter to output corresponding power respectively according to the power distribution, and controls the lithium battery pack and the super capacitor module to bear the corresponding power respectively.
In one embodiment, when the hybrid energy source is in a discharging mode and the load requires a certain power, the control unit controls the supercapacitor module and the lithium battery pack to discharge with a first discharging power and a second discharging power respectively; wherein the first discharge power is greater than the second discharge power, and a sum of the first discharge power and the second discharge power is equal to the load demand power.
In an embodiment, when the state of charge of the supercapacitor module is lower than a first discharge setting value and the state of charge of the lithium battery pack is not lower than a second discharge setting value, the control unit controls the supercapacitor module to reduce the discharge power and controls the lithium battery pack to increase the discharge power.
In an embodiment, when the state of charge of the lithium battery pack is lower than a second discharge setting value and the state of charge of the supercapacitor module is not lower than a first discharge setting value, the control unit controls the supercapacitor module to increase the discharge power and controls the lithium battery pack to decrease the discharge power.
In an embodiment, when the state of charge of the super capacitor module is lower than a first discharge setting value and the state of charge of the lithium battery pack is lower than a second discharge setting value, the control unit controls the super capacitor module and the lithium battery pack to respectively reduce the discharge power.
In one embodiment, when the hybrid energy source is in a charging mode and a load requires a certain power, the control unit controls the supercapacitor module and the lithium battery pack to be charged with a first charging power and a second charging power respectively; wherein the first charging power is greater than the second charging power.
In an embodiment, when the state of charge of the super capacitor module is higher than a first charging setting value and the state of charge of the lithium battery pack is not higher than a second charging setting value, the control unit controls the super capacitor module to decrease the charging power and controls the lithium battery pack to increase the charging power.
In an embodiment, when the state of charge of the lithium battery pack is higher than a second charging setting value and the state of charge of the super capacitor module is not higher than a first charging setting value, the control unit controls the super capacitor module to increase the charging power and controls the lithium battery pack to decrease the charging power.
In an embodiment, when the state of charge of the super capacitor module is higher than a first charging setting value and the state of charge of the lithium battery pack is higher than a second charging setting value, the control unit controls the super capacitor module and the lithium battery pack to respectively reduce charging power.
In an embodiment, when the load is idle, and when the state of charge of the supercapacitor module is lower than a first preset minimum critical value, the control unit controls the lithium battery pack to charge the supercapacitor module.
In an embodiment, when the load is idle, and when the state of charge of the super capacitor module is higher than a first preset highest critical value, the control unit controls the super capacitor module to charge the lithium battery pack.
In an embodiment, when the load is idle, and when the state of charge of the lithium battery pack is lower than a second predetermined minimum threshold value, the control unit controls the supercapacitor module to charge the lithium battery pack.
In an embodiment, when the load is idle, and when the state of charge of the lithium battery pack is higher than a second preset highest critical value, the control unit controls the lithium battery pack to charge the supercapacitor module.
The embodiment of the invention has the beneficial effects that:
lithium group and ultracapacitor system module in the composite energy are connected through the DC/DC converter, can avoid both lug connection of lithium group and ultracapacitor system module to be in the same place and influence life.
According to different requirements of different composite energy power distribution systems, lithium battery packs and super capacitor modules with different voltage levels can be matched, so that the hybrid energy power distribution system is suitable for different working environments.
In the discharge mode of the composite energy, the discharge power of the super capacitor module and the discharge power of the lithium battery pack are regulated and controlled under different conditions, so that the quick discharge performance of the super capacitor module can be fully utilized, the composite energy is protected, and over-discharge is avoided.
In the charge mode of the composite energy, the charge power of the super capacitor module and the charge power of the lithium battery pack are regulated and controlled under different conditions, the quick charge performance of the super capacitor module can be fully utilized, the composite energy is protected, and overcharge is avoided.
The control unit preferentially distributes high power to the super capacitor module, so that the high power density of the super capacitor module is utilized, the overall working efficiency is improved, and the loss is reduced. And can also avoid the impact of heavy current to the lithium cell group to reach the purpose of protecting the complex energy, improve life.
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 for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a hybrid energy power distribution system according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the expressions "first", "second", etc. appearing several times in the specification are merely for distinguishing different terms and are not intended to limit the order between the different terms.
In the prior art, a single battery energy source always has the problems of low power density, limited cycle life, poor low-temperature performance and the like. Over ten years, the price of the super capacitor is reduced by 99 percent, and the battery is reduced by 30 to 40 percent. In addition, the composite energy system in the prior art has the problems that the power cannot be distributed, the high power density and the quick discharge performance of the super capacitor are not fully utilized, the battery pack cannot be fully protected, the structure is complex and the like. In view of the above problems, the present invention provides a composite energy management system with controllable power distribution.
As shown in fig. 1, an embodiment of the present invention provides a hybrid energy power distribution system, including: the hybrid energy source comprises a lithium battery pack and a super capacitor module, and the control device comprises a control unit, a first DC/DC converter and a second DC/DC converter.
As shown in fig. 1, the lithium battery pack is connected to the first DC/DC converter, the super capacitor module is connected to the second DC/DC converter, and the first DC/DC converter and the second DC/DC converter are connected to a load. The first DC/DC converter and the second DC/DC converter may be different in model, and the specific model may be determined according to the voltage of the hybrid energy source (supercapacitor module or lithium battery pack) connected thereto and the voltage of the load. The lithium battery pack, the super capacitor module, the first DC/DC converter, the second DC/DC converter and the load are connected in a hardware mode.
Lithium group and ultracapacitor system module in the composite energy are connected through the DC/DC converter, can avoid both lug connection of lithium group and ultracapacitor system module to be in the same place and influence life.
The control unit is connected with the lithium battery pack, the super capacitor module, the first DC/DC converter, the second DC/DC converter and the load through the CAN communication network respectively. The control unit may be a CPU, MCU, FPGA, etc., but the invention is not limited thereto.
During concrete implementation, the voltage levels of the lithium battery pack and the super capacitor module in the composite energy can be different, the voltages of the lithium battery pack and the super capacitor module can be freely matched according to the required capacities, and the voltage adjustable range is wide. According to different requirements of different composite energy power distribution systems, lithium battery packs and super capacitor modules with different voltage levels can be matched, so that the hybrid energy power distribution system is suitable for different working environments.
The control unit CAN acquire information such as power demand of the load, state data of the first DC/DC converter, state data of the second DC/DC converter, state data of the composite energy source and the like through the CAN communication network. According to the power requirement of the load, the state data of the first DC/DC converter, the state data of the second DC/DC converter and the state data of the composite energy, the control unit can calculate the power distribution which needs to be borne by the lithium battery pack and the super capacitor module respectively, then controls the first DC/DC converter and the second DC/DC converter to output corresponding power respectively according to the power distribution, and further controls the lithium battery pack and the super capacitor module to bear corresponding power respectively. In other words, according to the power demand of the load, the state data of the first DC/DC converter, the state data of the second DC/DC converter, and the state data of the hybrid energy, the control unit may generate a power distribution instruction that needs to be borne by each of the lithium battery pack and the supercapacitor module, and control the first DC/DC converter and the second DC/DC converter to output corresponding power through the power distribution instruction, so as to control each of the lithium battery pack and the supercapacitor module to bear corresponding power.
The load according to the invention may be a motor vehicle, the power requirement of which may be assumed and determined empirically. The status data of the first DC/DC converter and the second DC/DC converter may include whether there is a fault, whether there is overheating, etc. The state data of the lithium battery pack and the super capacitor module in the hybrid energy includes the charge states of the lithium battery pack and the super capacitor module, and the like, which is not limited in the invention.
The control strategy of the control unit is different under different working modes, and the different working modes comprise a discharging mode of the composite energy source, a charging mode of the composite energy source and a load idle mode. The control unit can reasonably distribute the charging and discharging power of the composite energy source when the composite energy source works in various different modes and monitor the working states of all parts of the composite energy source system. The following describes the control and monitoring of the first DC/DC converter, the second DC/DC converter, the lithium battery pack and the super capacitor module by the control unit in different operating modes.
Discharge mode of the composite energy source:
in the first case: when the composite energy source is in a discharging mode and the load demand power is constant, the control unit controls the super capacitor module to discharge with the first discharging power and controls the lithium battery pack to discharge with the second discharging power; wherein the first discharge power is greater than the second discharge power, and the sum of the first discharge power and the second discharge power is equal to the load demand power.
The first discharge power is larger than the second discharge power, and the control unit preferentially distributes high power to the super capacitor module, so that the high power density of the super capacitor module is utilized, the overall working efficiency is improved, and the loss is reduced. And can also avoid the impact of heavy current to the lithium cell group to reach the purpose of protecting the complex energy, improve life.
For example, the load demand power is 1, the control unit may control the output power of the supercapacitor module to be 70% of the load demand power, and control the output power of the lithium battery pack to be 30% of the load demand power.
It should be noted that, in the first case, the state of charge of the supercapacitor module needs to be not lower than a first discharge setting value, and the state of charge of the lithium battery pack needs to be not lower than a second discharge setting value. In one embodiment, the first discharge setting value represents that the remaining capacity of the super capacitor module is 40%, and the second discharge setting value represents that the remaining capacity of the lithium battery pack is 30%.
The control unit can periodically acquire the working charge states of the lithium battery pack and the super capacitor module when the composite energy source is in a discharge mode.
In the second case: when the control unit learns that the charge state of the supercapacitor module is lower than the first discharge set value and the charge state of the lithium battery pack is not lower than the second discharge set value, the control unit can control the supercapacitor module to reduce discharge power and control the lithium battery pack to increase discharge power. For example, the discharge power of the supercapacitor module is controlled to be reduced to 60%, and the discharge power of the lithium battery module is increased to 40% or 30%, which is not limited by the invention. At the moment, the sum of the discharge power of the super capacitor module and the increased discharge power of the lithium battery pack is less than or equal to the load demand power.
In the third case: when the charge state of the lithium battery pack is lower than the second discharge set value and the charge state of the super capacitor module is not lower than the first discharge set value, the control unit can control the super capacitor module to increase discharge power and control the lithium battery pack to decrease discharge power. For example, the discharge power of the supercapacitor module is controlled to be increased to 80%, and the discharge power of the lithium battery module is reduced to 20% or 10%, which is not limited by the invention. At the moment, the sum of the discharge power of the super capacitor module and the increased discharge power of the lithium battery pack is less than or equal to the load demand power.
In a fourth case: when the state of charge of the supercapacitor module is lower than the first discharge set value and the state of charge of the lithium battery pack is lower than the second discharge set value, the control unit can control the supercapacitor module and the lithium battery pack to respectively reduce discharge power. For example, the discharge power of the supercapacitor module is controlled to be reduced to 60%, and the discharge power of the lithium battery module is reduced to 20%, which is not limited by the present invention. At the moment, the sum of the discharge power of the super capacitor module and the increased discharge power of the lithium battery pack is smaller than the load demand power.
In the discharge mode of the composite energy, the discharge power of the supercapacitor module and the increased discharge power of the lithium battery pack are regulated and controlled under different conditions, the quick discharge performance of the supercapacitor module can be fully utilized, the composite energy is protected, and over-discharge is avoided.
Charging mode of the composite energy source:
in the first case: when the composite energy source is in a charging mode and the load demand power is constant, the control unit can control the super capacitor module and the lithium battery pack to be charged with first charging power and second charging power respectively; the first charging power is larger than the second charging power, and the sum of the first charging power and the second charging power is equal to the load demand power.
The first charging power is larger than the second charging power, and the control unit preferentially distributes high power to the super capacitor module, so that the high power density of the super capacitor module is utilized, the overall working efficiency is improved, and the loss is reduced. And can also avoid the impact of heavy current to the lithium cell group to reach the purpose of protecting the complex energy, improve life.
For example, the load demand power is 1, the control unit may control the charging power of the super capacitor module to be 70% of the load demand power, and control the charging power of the lithium battery pack to be 30% of the load demand power, which is not limited in the present invention.
It should be noted that, in the first case, the state of charge of the supercapacitor module needs to be not lower than a first charging setting value, and the state of charge of the lithium battery pack needs to be not lower than a second charging setting value. In an embodiment, the first charging setting value represents that the remaining capacity of the super capacitor module is 80%, and the second charging setting value represents that the remaining capacity of the lithium battery pack is 80%, which is not limited herein.
The control unit can periodically acquire the working charge states of the lithium battery pack and the super capacitor module when the composite energy source is in a charging mode.
In the second case: when the control unit learns that the charge state of the supercapacitor module is higher than the first charging set value and the charge state of the lithium battery pack is not higher than the second charging set value, the control unit can control the supercapacitor module to reduce charging power and control the lithium battery pack to increase charging power. For example, the control unit may control the charging power of the super capacitor module to be 60% and control the charging power of the lithium battery pack to be 40% or 35%, which is not limited in the disclosure. At this time, the sum of the charging power of the super capacitor module and the increased charging power of the lithium battery pack is less than or equal to the load demand power.
In the third case: when the charge state of the lithium battery pack is higher than the second charging set value and the charge state of the super capacitor module is not higher than the first charging set value, the control unit can control the super capacitor module to increase the charging power and control the lithium battery pack to decrease the charging power. For example, the charging power of the supercapacitor module is controlled to be increased to 75%, and the charging power of the lithium battery module is reduced to 20% or 25%, which is not limited by the invention. At this time, the sum of the charging power of the super capacitor module and the increased charging power of the lithium battery pack is less than or equal to the load demand power.
In a fourth case: when the charge state of the super capacitor module is higher than the first charging set value and the charge state of the lithium battery pack is higher than the second charging set value, the control unit can control the super capacitor module and the lithium battery pack to respectively reduce charging power. For example, the charging power of the supercapacitor module is controlled to be reduced to 60%, and the charging power of the lithium battery module is reduced to 20%, which is not limited by the invention. At the moment, the sum of the charging power of the super capacitor module and the increased charging power of the lithium battery pack is smaller than the load demand power.
In the charge mode of above-mentioned compound energy, adjust and control the charge power of ultracapacitor system module and the increase charge power of lithium cell group under the circumstances of difference, can make full use of the quick charge performance of ultracapacitor system module to protect the compound energy, avoid overcharging.
Load idle mode:
in the first case: when the load is idle, if the charge state of the super capacitor module is lower than a first preset minimum critical value (namely, the charge state of the super capacitor module is too low), the control unit can control the lithium battery pack to charge the super capacitor module. In an embodiment, the first predetermined minimum threshold may be set to 20%, but the invention is not limited thereto.
In the second case: when the load is idle, when the charge state of the super capacitor module is higher than a first preset highest critical value, the control unit can control the super capacitor module to charge the lithium battery pack. In an embodiment, the first predetermined minimum threshold may be set to 90%, but the invention is not limited thereto.
In the third case: when the load is idle, and when the charge state of the lithium battery pack is lower than a second preset minimum critical value, the control unit can control the super capacitor module to charge the lithium battery pack. In an embodiment, the second predetermined minimum threshold may be set to 15%, and the invention is not limited thereto.
In a fourth case: when the load is idle, and when the state of charge of the lithium battery pack is higher than a second preset highest critical value, the control unit can control the lithium battery pack to charge the supercapacitor module. In an embodiment, the second predetermined minimum threshold may be set to 85%, which is not limited in the present invention.
The invention utilizes the advantages of low temperature, high power density, ultra-long cycle use times and the like of the super capacitor to make up the disadvantages of the lithium battery, and forms a more efficient and more environment-friendly composite energy management system.
The composite energy power distribution system can be used for occasions such as electric buses, electric cars, energy storage and the like, and can also be used for improving the starting performance of the existing fuel vehicle and improving the fuel economy. The national energy-saving and new energy automobile industry development planning clearly indicates that pure electric driving is the main strategic orientation of new energy automobile development and automobile industry transformation, the industrialization of pure electric automobiles and plug-in hybrid electric automobiles is mainly promoted at present, non-plug-in hybrid electric automobiles and energy-saving internal combustion engine automobiles are popularized and popularized, and the overall technical level of the automobile industry in China is improved. In 2015, the accumulated output and sales volume of the pure electric vehicle and the plug-in hybrid electric vehicle strives to reach 50 thousands of vehicles; in 2020, the production capacity of pure electric vehicles and plug-in hybrid electric vehicles reaches 200 thousands, the accumulated output and sales volume exceeds 500 thousands, and the hydrogen energy industry of fuel cell vehicles and vehicles is synchronously developed with the world. In addition, the research report of market situation and development prospect of Chinese Battery Management System (BMS) in 2013 and 2018 indicates that the market capacity of the BMS reaches 360 hundred million in 2020. Therefore, the electric automobile energy management industry has wide prospect and is expected. The implementation of the invention meets the policy requirements, and by utilizing the advanced hybrid energy management technology, a standardized and standardized research and development system and an industrialization system are gradually formed in the field of energy management of electric vehicles, and the invention is popularized and applied in a large scale.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The principle and the implementation mode of the invention are explained by applying specific embodiments in the invention, and the description of the embodiments is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (13)
1. A hybrid energy power distribution system, comprising: a hybrid energy and control device; the composite energy source consists of a lithium battery pack and a super capacitor module, and the control device consists of a control unit, a first DC/DC converter and a second DC/DC converter; wherein,
the lithium battery pack is connected with the first DC/DC converter, the super capacitor module is connected with the second DC/DC converter, and the first DC/DC converter and the second DC/DC converter are connected and then are connected to a load together; the control unit is respectively connected with the lithium battery pack, the super capacitor module, the first DC/DC converter, the second DC/DC converter and the load through a CAN communication network;
the control unit acquires the power requirement of the load, the state data of the first DC/DC converter, the state data of the second DC/DC converter and the state data of the composite energy source through a CAN communication network, calculates the power distribution required to be born by the lithium battery pack and the super capacitor module according to the power requirement of the load, the state data of the first DC/DC converter, the state data of the second DC/DC converter and the state data of the composite energy source, controls the first DC/DC converter and the second DC/DC converter to output corresponding power respectively according to the power distribution, and controls the lithium battery pack and the super capacitor module to bear the corresponding power respectively.
2. The hybrid energy power distribution system of claim 1, wherein when the hybrid energy source is in a discharging mode and a load demands power, the control unit controls the ultracapacitor module and the lithium battery pack to discharge at a first discharging power and a second discharging power respectively; wherein the first discharge power is greater than the second discharge power, and a sum of the first discharge power and the second discharge power is equal to the load demand power.
3. The hybrid energy power distribution system of claim 2, wherein the control unit controls the ultracapacitor module to decrease the discharge power and controls the lithium battery pack to increase the discharge power when the state of charge of the ultracapacitor module is lower than a first discharge setting and the state of charge of the lithium battery pack is not lower than a second discharge setting.
4. The hybrid energy power distribution system of claim 2, wherein the control unit controls the ultracapacitor module to increase the discharge power and controls the lithium battery pack to decrease the discharge power when the state of charge of the lithium battery pack is lower than a second discharge setting and the state of charge of the ultracapacitor module is not lower than a first discharge setting.
5. The hybrid energy power distribution system of claim 2, wherein the control unit controls the ultracapacitor module and the lithium battery pack to respectively reduce the discharge power when the state of charge of the ultracapacitor module is lower than a first discharge setting and the state of charge of the lithium battery pack is lower than a second discharge setting.
6. The hybrid energy power distribution system of claim 1, wherein when the hybrid energy source is in a charging mode and a load demands power, the control unit controls the ultracapacitor module and the lithium battery pack to be charged with a first charging power and a second charging power respectively; wherein the first charging power is greater than the second charging power.
7. The hybrid energy power distribution system of claim 2, wherein the control unit controls the ultracapacitor module to decrease the charging power and controls the lithium battery pack to increase the charging power when the state of charge of the ultracapacitor module is higher than a first charging setting and the state of charge of the lithium battery pack is not higher than a second charging setting.
8. The hybrid energy power distribution system of claim 2, wherein the control unit controls the ultracapacitor module to increase the charging power and controls the lithium battery pack to decrease the charging power when the state of charge of the lithium battery pack is higher than a second charging setting and the state of charge of the ultracapacitor module is not higher than a first charging setting.
9. The hybrid energy power distribution system of claim 2, wherein the control unit controls the ultracapacitor module and the lithium battery pack to respectively reduce charging power when the state of charge of the ultracapacitor module is higher than a first charging set value and the state of charge of the lithium battery pack is higher than a second charging set value.
10. The hybrid energy power distribution system of claim 1, wherein the control unit controls the lithium battery pack to charge the supercapacitor module when the load is idle and the state of charge of the supercapacitor module is lower than a first predetermined minimum threshold.
11. The hybrid energy power distribution system of claim 1, wherein the control unit controls the ultracapacitor module to charge the lithium battery pack when the state of charge of the ultracapacitor module is higher than a first preset maximum threshold value when the load is idle.
12. The hybrid energy power distribution system of claim 1, wherein the control unit controls the ultracapacitor module to charge the lithium battery pack when the load is idle and the state of charge of the lithium battery pack is below a second predetermined minimum threshold.
13. The hybrid energy power distribution system of claim 1, wherein the control unit controls the lithium battery pack to charge the supercapacitor module when the load is idle and the state of charge of the lithium battery pack is higher than a second predetermined maximum threshold.
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