CN108736109B - Battery thermal management system and battery temperature adjusting method - Google Patents

Battery thermal management system and battery temperature adjusting method Download PDF

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Publication number
CN108736109B
CN108736109B CN201810344811.1A CN201810344811A CN108736109B CN 108736109 B CN108736109 B CN 108736109B CN 201810344811 A CN201810344811 A CN 201810344811A CN 108736109 B CN108736109 B CN 108736109B
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temperature
battery
value
output flow
heat exchanger
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CN108736109A (en
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陆群
王世宇
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CH Auto Technology Co Ltd
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CH Auto Technology Co Ltd
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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
    • H01M10/617—Types of temperature control for achieving uniformity or desired distribution of temperature
    • 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
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6567—Liquids
    • 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

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Secondary Cells (AREA)

Abstract

The invention discloses a battery thermal management system and a battery temperature adjusting method, relates to the technical field of electric automobiles, improves the working efficiency of a power battery, and can exert the maximum use performance of the power battery. The main technical scheme of the invention is as follows: each heat exchanger is arranged on the corresponding battery box, the input end of each heat exchanger is provided with a control valve, and the output end of each heat exchanger is provided with a flow sensor; the heat source equipment is arranged outside the battery box, the input end of the heat source equipment is connected to the output end of each heat exchanger, and the output end of the heat source equipment is connected to the input end of each heat exchanger; and the controller is arranged outside the battery box, the input end of the controller is respectively connected to the output end of each flow sensor, and the output end of the controller is respectively connected to the input end of each control valve. The invention is suitable for the process of carrying out temperature regulation treatment on a plurality of battery boxes.

Description

Battery thermal management system and battery temperature adjusting method
Technical Field
The invention relates to the technical field of electric automobiles, in particular to a battery thermal management system and a battery temperature adjusting method.
Background
With the continuous development of society, the living standard of people is continuously improved, the demand of people for automobiles is also larger and larger, and electric automobiles using electric energy as power are produced due to the shortage of energy and the increasingly serious problem of environmental pollution caused by traditional automobiles. On the basis of meeting the requirement of the dynamic property of the electric automobile, the guarantee of the endurance mileage of the electric automobile is particularly important, and because the working efficiency of the power battery is influenced by the temperature of the power battery, the maximum use performance of the power battery can be exerted and the endurance mileage of the electric automobile can be improved only by ensuring that the power battery works at a proper temperature in the running process of the electric automobile.
At present, a power battery of an electric vehicle is composed of a plurality of battery boxes, as shown in fig. 1, the plurality of battery boxes are connected in parallel in a water circuit, and when temperature adjustment processing needs to be performed on the plurality of battery boxes, a heat source device inputs cooling liquid with appropriate temperature to a heat exchanger corresponding to each battery box, so that the heat exchanger performs heat exchange with the battery devices in the corresponding battery boxes, and an effect of heating or cooling the battery boxes is achieved.
In the process of implementing the invention, the inventor finds that in the prior art, when the battery boxes are subjected to temperature adjustment processing by using the cooling liquid, because the lengths of the branch pipes between the output end of the heat source device and the input end of the heat exchanger corresponding to each battery box are different, the flow of the cooling liquid flowing through each heat exchanger is also different, so that the heat exchange effects of the plurality of battery boxes cannot be ensured to be the same, and a temperature difference exists between the plurality of battery boxes, so that the working efficiency of the power battery is low, and the maximum use performance of the power battery cannot be exerted.
Disclosure of Invention
In view of the above, the present invention provides a battery thermal management system and a battery temperature adjusting method, and mainly aims to ensure that heat exchange effects of a plurality of battery boxes constituting a power battery are the same when the plurality of battery boxes are subjected to temperature adjustment processing, so as to improve working efficiency of the power battery and exert maximum use performance of the power battery.
In order to solve the above problems, the present invention mainly provides the following technical solutions:
in a first aspect, the present invention provides a battery thermal management system, comprising:
the heat exchangers are arranged on the corresponding battery boxes and used for adjusting the temperature of battery equipment in the battery boxes, a control valve is arranged at the input end of each heat exchanger and used for adjusting the input flow value of cooling liquid flowing into the heat exchangers, and a flow sensor is arranged at the output end of each heat exchanger and used for detecting the output flow value of the cooling liquid flowing out of the heat exchangers;
the heat source equipment is arranged outside the battery box, the input end of the heat source equipment is respectively connected to the output end of each heat exchanger, the output end of the heat source equipment is respectively connected to the input end of each heat exchanger, and the heat source equipment is used for respectively inputting the cooling liquid into each heat exchanger to enable the heat exchangers to exchange heat with the battery equipment in the battery box;
the controller is arranged outside the battery box, the input end of the controller is connected to the output end of each flow sensor, the output end of the controller is connected to the input end of each control valve, the controller is used for obtaining the output flow value detected by each flow sensor, the difference value between the maximum output flow value and the minimum output flow value in the output flow values is the maximum output flow difference value between the heat exchangers, and when the maximum output flow difference value is larger than or equal to a preset flow threshold value, the controller adjusts the control valves to enable the maximum output flow difference value between the heat exchangers to be smaller than the preset flow threshold value.
Optionally, the heat source device includes a driving pump and a cold and heat source, an input end of the driving pump is connected to an output end of the cold and heat source, an output end of the driving pump is connected to an input end of each heat exchanger, an input end of the cold and heat source is connected to an output end of each heat exchanger, the driving pump is configured to provide power for the plurality of heat exchangers to input the cooling liquid, and the cold and heat source is configured to perform heat exchange processing on the cooling liquid to adjust the temperature of the cooling liquid.
Optionally, the controller includes an information acquisition module and a control module, an input end of the information acquisition module is connected to each output end of the flow sensor, an output end of the information acquisition module is connected to an input end of the control module, an output end of the control module is connected to each input end of the control valve, the information acquisition module is used for acquiring each output flow value detected by the flow sensor and sending the output flow values to the control module, and the control module is used for adjusting the control valves according to the output flow values when a maximum output flow difference between the output flow values is greater than or equal to the preset flow threshold value, so that the maximum output flow difference between the heat exchangers is smaller than the preset flow threshold value.
Optionally, a temperature detection module is arranged in each battery box, an output end of each temperature detection module is connected to an input end of the information acquisition module, the temperature detection module is configured to detect a temperature value of battery equipment in the battery box, and the information acquisition module is further configured to acquire the temperature value detected by each temperature detection module and send the temperature values to the control module; the output end of the control module is further connected to the input end of the driving pump, the control module is further used for judging whether the battery boxes are subjected to temperature regulation according to a plurality of temperature values, and when the control module determines that the battery boxes are subjected to temperature regulation according to judgment, the control module controls the driving pump to be started.
Optionally, the output end of the control module is further connected to the input end of the cold and heat source, and the control module is further configured to control the cold and heat source to perform heat exchange treatment on the cooling liquid according to the plurality of temperature values.
Optionally, the cold and heat source is a heat exchanger.
Optionally, the temperature detection module is a temperature sensor.
Optionally, the battery thermal management system further includes:
the alarm, the input of alarm connect in the output of controller, the controller is still used for when the maximum output flow difference is greater than or equal to and predetermines the flow threshold value, control the alarm sends the warning.
In a second aspect, the present invention further provides a method for adjusting a battery temperature, where the method is applied to the battery thermal management system, and the method includes:
when the heat source equipment carries out temperature regulation treatment on the plurality of battery boxes, the plurality of flow sensors respectively detect the output flow value of the cooling liquid flowing out of each heat exchanger;
the controller acquires an output flow value corresponding to each heat exchanger and calculates a maximum output flow difference value among the heat exchangers according to the output flow values, wherein the maximum output flow difference value is the difference value between the maximum output flow value and the minimum output flow value in the output flow values;
when the maximum output flow difference value is larger than or equal to a preset flow threshold value, the controller adjusts the control valve corresponding to each heat exchanger, so that the maximum output flow difference value among the plurality of heat exchangers is smaller than the preset flow threshold value.
Optionally, a temperature detection module is arranged in each battery box, the heat source device includes a driving pump, and the controller includes an information acquisition module and a control module; before the plurality of flow sensors respectively detect the output flow values of the coolant flowing out of each heat exchanger when the heat source device performs the temperature adjustment process on the plurality of battery boxes, the method further includes:
the temperature detection modules detect the temperature value corresponding to each battery box;
the information acquisition module acquires a temperature value corresponding to each battery box and sends the temperature values to the control module;
the control module judges whether to regulate the temperature of the battery boxes according to the temperature values;
if yes, the control module controls the driving pump to be started, so that the cooling liquid flows into each heat exchanger to exchange heat with the battery equipment in each battery box.
Optionally, the control module determines whether to adjust the temperature of the plurality of battery boxes according to the plurality of temperature values, including:
the control module calculates average temperature values corresponding to the battery boxes according to the temperature values, and calculates maximum temperature difference values among the battery boxes according to the maximum temperature value and the minimum temperature value in the temperature values;
judging whether the average temperature value is less than or equal to a first preset temperature threshold value or not;
if the average temperature value is smaller than or equal to the first preset temperature threshold value, determining to perform temperature adjustment processing on the plurality of battery boxes;
if the average temperature value is greater than the first preset temperature threshold value, judging whether the average temperature value is greater than or equal to a second preset temperature threshold value;
if the average temperature value is greater than or equal to a second preset temperature threshold value, determining to perform temperature adjustment processing on the plurality of battery boxes;
if the average temperature value is smaller than the second preset temperature threshold value, judging whether the maximum temperature difference value is larger than or equal to a third preset temperature threshold value;
if the maximum temperature difference value is larger than or equal to the third preset temperature threshold value, determining to perform temperature adjustment processing on the plurality of battery boxes;
wherein the second preset temperature threshold is greater than the first preset temperature threshold.
Optionally, the obtaining, by the controller, an output flow value corresponding to each heat exchanger, and calculating a maximum output flow difference value between the plurality of heat exchangers according to the plurality of output flow values includes:
the information acquisition module acquires an output flow value corresponding to each heat exchanger and sends the output flow values to the control module;
and the control module calculates the maximum output flow difference value among the heat exchangers according to the maximum output flow value and the minimum output flow value in the output flow values.
Optionally, the adjusting, by the controller, the control valve corresponding to each heat exchanger so that the maximum output flow difference between the plurality of heat exchangers is smaller than the preset flow threshold includes:
the control module calculates average output flow values corresponding to the heat exchangers according to the output flow values;
the control module determines a heat exchanger corresponding to the maximum output flow value;
the control module controls the control valve corresponding to the heat exchanger, and adjusts the input flow value corresponding to the heat exchanger to the average output flow value, so that the maximum output flow difference value among the heat exchangers is smaller than the preset flow threshold value.
Optionally, the heat source device further comprises a cold and heat source; before the control module controls the driving pump to be started to enable the cooling liquid to flow into each heat exchanger to exchange heat with the battery equipment in each battery box, the method further comprises the following steps:
the control module controls the cold and hot sources to carry out heat exchange treatment on the cooling liquid according to the plurality of temperature values.
By the technical scheme, the technical scheme provided by the invention at least has the following advantages:
the invention provides a battery thermal management system and a battery temperature adjusting method, which are used for avoiding the problem that the heat exchange effects of a plurality of battery boxes are different due to the fact that the flow of cooling liquid flowing through a heat exchanger corresponding to each battery box is unbalanced. Compared with the prior art that when temperature regulation treatment needs to be carried out on a plurality of battery boxes, cooling liquid with proper temperature is input into the heat exchanger corresponding to each battery box by the heat source equipment, so that heat exchange is carried out between the heat exchanger and the battery equipment in the corresponding battery box, the battery heat management system provided by the invention comprises: a plurality of heat exchangers, a heat source device, and a controller; each heat exchanger is arranged on a corresponding battery box, the input end of each heat exchanger is provided with a control valve, the output end of each heat exchanger is provided with a flow sensor, the input end of heat source equipment is respectively connected with the output end of each heat exchanger, the output end of the heat source equipment is respectively connected with the input end of each heat exchanger, the input end of a controller is respectively connected with the output end of each flow sensor, and the output end of the controller is respectively connected with the input end of each control valve; when the heat source equipment inputs cooling liquid into each heat exchanger and carries out temperature regulation treatment on a plurality of battery boxes, firstly, detecting the output flow value of the cooling liquid flowing out of each heat exchanger through a plurality of flow sensors respectively; then, the output flow value corresponding to each heat exchanger is obtained through the controller, when the controller judges that the maximum output flow difference value between the heat exchangers is larger than or equal to the preset flow threshold value, the controller changes the input flow value corresponding to each heat exchanger by adjusting the opening of the control valve corresponding to each heat exchanger, so that the maximum output flow value between the heat exchangers is smaller than the preset flow threshold value, the heat exchange effect of the battery boxes can be guaranteed to be the same, the working efficiency of the power battery is improved, and the maximum use performance of the power battery is exerted.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 is a schematic diagram illustrating a battery thermal management system provided in the prior art;
fig. 2 is a schematic structural diagram illustrating a battery thermal management system according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of another battery thermal management system according to an embodiment of the present invention;
fig. 4 is a flowchart illustrating a method for adjusting a battery temperature according to an embodiment of the present invention;
FIG. 5 is a flow chart illustrating another method for regulating the temperature of a battery according to an embodiment of the present invention;
fig. 6 is a flowchart illustrating an operation principle of a battery thermal management system according to an embodiment of the present invention to perform temperature adjustment processing on a plurality of battery boxes.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The present invention provides a battery thermal management system, as shown in fig. 2, including: a plurality of heat exchangers 1, a heat source device 2, and a controller 3;
the heat exchanger comprises a plurality of heat exchangers 1, wherein each heat exchanger 1 is installed on a corresponding battery box 4, the input end of each heat exchanger 1 is provided with a control valve 5, and the output end of each heat exchanger 1 is provided with a flow sensor 6, wherein the heat exchangers 1 are used for adjusting the temperature of battery equipment in the battery boxes 4, the control valves 5 are used for adjusting the input flow value of cooling liquid flowing into the heat exchangers 1, and the flow sensors 6 are used for detecting the output flow value of the cooling liquid flowing out of the heat exchangers 1;
the heat source equipment 2 is arranged outside the battery box 4, the input end of the heat source equipment 2 is respectively connected with the output end of each heat exchanger 1, and the output end of the heat source equipment 2 is respectively connected with the input end of each heat exchanger 1, wherein the heat source equipment 2 is used for respectively inputting cooling liquid into each heat exchanger 1 so as to enable the heat exchangers 1 to exchange heat with the battery equipment in the corresponding battery box 4;
the controller 3 is arranged outside the battery box 4, an input end of the controller 3 is connected to an output end of each flow sensor 6, an output end of the controller 3 is connected to an input end of each control valve 5, the controller 3 is used for obtaining output flow values detected by each flow sensor 6, the difference value between the maximum output flow value and the minimum output flow value in the plurality of output flow values is the maximum output flow difference value among the plurality of heat exchangers 1, and when the maximum output flow difference value among the plurality of heat exchangers 1 is larger than or equal to a preset flow threshold value, the controller 3 adjusts the plurality of control valves 5 to enable the maximum output flow difference value among the plurality of heat exchangers 1 to be smaller than the preset flow threshold value.
Wherein, power battery among the electric automobile is constituteed to a plurality of battery boxes 4, power battery is used for providing power and electric energy for electric automobile, in order to exert power battery's maximum performance, need guarantee that a plurality of battery boxes 4 all work under the suitable temperature to need heat source equipment 2 to the coolant liquid of the suitable temperature of heat exchanger 1 input that every battery box 4 corresponds, make heat exchanger 1 carry out heat exchange with the battery equipment among the battery box 4 that corresponds rather than, and then reach the effect for the battery equipment in battery box 4 intensifies or cools down. Because the lengths of the branch pipes between the output end of the heat source device 2 and the input end of each heat exchanger 1 are different, the flow of the cooling liquid flowing through each heat exchanger 1 is different, so that when the controller 3 determines that the maximum output flow difference value between the plurality of heat exchangers 1 is greater than or equal to the preset flow threshold value, the controller 3 changes the input flow value corresponding to each heat exchanger 1 by adjusting the opening degree of the control valve 5 corresponding to each heat exchanger 1, so that the maximum output flow value between the plurality of heat exchangers 1 is smaller than the preset flow threshold value, and the situation that the heat exchange effects of the plurality of battery boxes 4 are different due to unbalanced flow of the cooling liquid flowing through each heat exchanger 1 can be avoided.
The battery thermal management system in the embodiment of the present invention is specifically described below by using the working process and principle of the battery thermal management system in the embodiment of the present invention:
firstly, when the heat source equipment 2 inputs cooling liquid to each heat exchanger 1 and carries out temperature regulation treatment on a plurality of battery boxes 4, respectively detecting the output flow value of the cooling liquid flowing out of each heat exchanger 1 through a plurality of flow sensors 6;
then, the controller 3 obtains the output flow value corresponding to each heat exchanger 1, and when the controller 3 determines that the maximum output flow difference value among the plurality of heat exchangers 1 is greater than or equal to the preset flow threshold value, the controller 3 adjusts the opening degree of the control valve 5 corresponding to each heat exchanger 1 to change the input flow value corresponding to each heat exchanger 1, so that the maximum output flow value among the plurality of heat exchangers 1 is smaller than the preset flow threshold value.
The embodiment of the invention provides a battery thermal management system, which is used for avoiding the problem that the heat exchange effects of a plurality of battery boxes are different due to the fact that the flow of coolant flowing through a heat exchanger corresponding to each battery box is unbalanced. Compared with the prior art that when temperature regulation processing needs to be performed on a plurality of battery boxes, cooling liquid with proper temperature is input into the heat exchanger corresponding to each battery box by the heat source equipment, so that heat exchange is performed between the heat exchanger and the battery equipment in the corresponding battery box, the battery heat management system provided by the embodiment of the invention comprises: a plurality of heat exchangers, a heat source device, and a controller; each heat exchanger is arranged on a corresponding battery box, the input end of each heat exchanger is provided with a control valve, the output end of each heat exchanger is provided with a flow sensor, the input end of heat source equipment is respectively connected with the output end of each heat exchanger, the output end of the heat source equipment is respectively connected with the input end of each heat exchanger, the input end of a controller is respectively connected with the output end of each flow sensor, and the output end of the controller is respectively connected with the input end of each control valve; when the heat source equipment inputs cooling liquid into each heat exchanger and carries out temperature regulation treatment on a plurality of battery boxes, firstly, detecting the output flow value of the cooling liquid flowing out of each heat exchanger through a plurality of flow sensors respectively; then, the output flow value corresponding to each heat exchanger is obtained through the controller, when the controller judges that the maximum output flow difference value between the heat exchangers is larger than or equal to the preset flow threshold value, the controller changes the input flow value corresponding to each heat exchanger by adjusting the opening of the control valve corresponding to each heat exchanger, so that the maximum output flow value between the heat exchangers is smaller than the preset flow threshold value, the heat exchange effect of the battery boxes can be guaranteed to be the same, the working efficiency of the power battery is improved, and the maximum use performance of the power battery is exerted.
Further, as shown in fig. 3, the heat source device 2 includes a driving pump 21 and a cold-heat source 22, an input end of the driving pump 21 is connected to an output end of the cold-heat source 22, an output end of the driving pump 21 is connected to an input end of each heat exchanger 1, an input end of the cold-heat source 22 is connected to an output end of each heat exchanger 1, wherein the driving pump 21 is configured to provide power for inputting the cooling liquid into the plurality of heat exchangers 1, and the cold-heat source 22 is configured to perform a heat exchange process on the cooling liquid to adjust the temperature of the cooling liquid. In the embodiment of the present invention, when temperature adjustment processing needs to be performed on the plurality of battery boxes 4, heat exchange processing is performed on the coolant by the cold/heat source 22, that is, temperature increase processing or temperature decrease processing is performed on the coolant by the cold/heat source 22, after the heat exchange processing is performed on the coolant by the cold/heat source 22, the driving pump 21 is started, and the coolant at an appropriate temperature flows into each heat exchanger 1 under the driving of the driving pump 21, and exchanges heat with the battery devices in each battery box 4, thereby performing temperature adjustment processing on the plurality of battery boxes 4.
Further, as shown in fig. 3, the controller 3 includes an information obtaining module 31 and a control module 32, an input end of the information obtaining module 31 is connected to an output end of each flow sensor 6, an output end of the information obtaining module 31 is connected to an input end of the control module 32, and an output end of the control module 32 is connected to an input end of each control valve 5, wherein the information obtaining module 31 is configured to obtain an output flow value detected by each flow sensor 6, and send the obtained plurality of output flow values to the control module 32, and the control module 32 is configured to adjust the plurality of control valves 5 according to the plurality of output flow values when a maximum output flow difference between the plurality of output flow values is greater than or equal to a preset flow threshold, so that the maximum output flow difference between the plurality of heat exchangers 1 is smaller than the preset flow threshold. In the embodiment of the present invention, when a plurality of flow sensors 6 detect an output flow value corresponding to each heat exchanger 1, an information obtaining module 31 obtains the output flow value detected by each flow sensor 6, and sends a plurality of obtained output flow values to a control module 32, the control module 32 determines whether the flow of the cooling liquid flowing through each heat exchanger is balanced after receiving the plurality of output flow values sent by the information obtaining module 31, and when the control module 32 determines that the maximum output flow difference between the plurality of heat exchangers 1 is greater than or equal to a preset flow threshold, the control module 32 changes the input flow value corresponding to each heat exchanger 1 by adjusting the opening of a control valve 5 corresponding to each heat exchanger 1, so that the maximum output flow value between the plurality of heat exchangers 1 is less than the preset flow threshold, thereby ensuring that the heat exchange effects of the plurality of battery boxes 4 are the same, the plurality of battery boxes 4 are each operated at an appropriate temperature.
Further, as shown in fig. 3, a temperature detection module 7 is disposed in each battery box 4, and an output end of each temperature detection module 7 is connected to an input end of the information acquisition module 31; the output of the control module 32 is also connected to the input of the drive pump 21. In the embodiment of the present invention, the temperature values of the battery devices in each battery box 4 are detected by the plurality of temperature detection modules 7, when the plurality of temperature detection modules 7 detect the temperature value corresponding to each battery box 4, the information acquisition module 31 respectively acquires the temperature value detected by each temperature detection module 7, and sends the acquired plurality of temperature values to the control module 32, after receiving the plurality of temperature values sent by the information acquisition module 31, the control module 32 determines whether to perform temperature adjustment processing on the plurality of battery boxes 4 according to the received plurality of temperature values, for example, when the temperature values corresponding to the plurality of battery boxes 4 are too high, too low, or the temperature difference between the plurality of battery boxes 4 is too large, the control module 32 determines to perform temperature adjustment processing on the plurality of battery boxes 4. When the control module 32 determines that the temperature adjustment processing is performed on the plurality of battery boxes 4 through judgment, the control module 32 controls the driving pump 21 to start, and at this time, the cooling liquid with the appropriate temperature is driven by the driving pump 21 to flow into each heat exchanger 1 respectively to perform heat exchange with each battery box 4, so that the temperature adjustment processing is performed on the plurality of battery boxes 4.
Further, as shown in fig. 3, the output end of the control module 32 is also connected to the input end of the cold heat source 22. In the embodiment of the present invention, after receiving the temperature value corresponding to each battery box 4, the control module 32 controls the cold and heat source 22 to perform heat exchange processing on the cooling liquid according to the received multiple temperature values, for example, when the temperature values corresponding to the multiple battery boxes 4 are too high, the control module 32 controls the cold and heat source 22 to perform cooling processing on the cooling liquid; when the temperature values corresponding to the plurality of battery boxes are too low, the control module 32 controls the cold and heat source 22 to heat the cooling liquid, but is not limited thereto.
Further, as shown in fig. 3, the cold heat source 22 is a heat exchanger. In the embodiment of the present invention, when the control module 32 controls the heat exchanger to cool the cooling water, the heat exchanger takes away heat of the cooling water when the cooling water flows through the heat exchanger; when the control module 32 controls the heat exchanger to heat up the cooling water, the heat exchanger provides heat for the cooling water in the process of flowing through the heat exchanger. Classes of heat exchangers include, but are not limited to: dividing wall type heat exchanger, hybrid heat exchanger and regenerative heat exchanger.
Further, as shown in fig. 3, the temperature detection module 7 is a temperature sensor. In the embodiment of the present invention, the temperature detection module 7 is generally a thermal resistance temperature sensor, and the working principle thereof is as follows: the resistance value of the thermal resistor in the thermal resistor temperature sensor can change along with the temperature change of a measuring object, so that the thermal resistor temperature sensor can deduce the temperature value of battery equipment in the battery box according to the change of the resistance value of the thermal resistor, and further the physical quantity is converted into an electric signal to be output.
Further, the battery thermal management system further includes: the input end of the alarm is connected to the output end of the controller 3, wherein the controller 3 is further used for controlling the alarm to give an alarm when the maximum output flow difference value is larger than or equal to the preset flow threshold value. In the embodiment of the invention, when the controller 3 determines that the maximum output flow difference value among the plurality of heat exchangers 1 is greater than or equal to the preset flow threshold value, the controller 3 controls the alarm to give an alarm to remind a user that the flow of the cooling liquid flowing through each heat exchanger is unbalanced. Wherein, the alarm can be but not limited to: an optical alarm, etc., which are not limited in this embodiment of the present invention.
An embodiment of the present invention provides a method for adjusting a battery temperature, where the method is applied to a battery thermal management system as shown in fig. 2 or fig. 3, where the battery thermal management system includes a plurality of heat exchangers, a heat source device, and a controller, and specifically as shown in fig. 4, the method includes:
201. when the heat source device performs temperature adjustment processing on the plurality of battery boxes, the plurality of flow sensors respectively detect an output flow value of the coolant flowing out of each heat exchanger.
Wherein, electric automobile's power battery comprises a plurality of battery boxes, in order to exert power battery's maximum performance, need guarantee that a plurality of battery boxes that constitute power battery all work under the suitable temperature, because, the heat transfer area of the heat exchanger that different battery boxes correspond is the same, consequently, when the flow of coolant liquid flow through every heat exchanger is balanced, alright guarantee that the heat transfer effect of a plurality of battery boxes is the same, thereby can guarantee that a plurality of battery boxes all work under the suitable temperature, exert power battery's maximum performance.
In the embodiment of the invention, when the controller controls the heat source equipment to input the cooling liquid to the heat exchanger corresponding to each battery box and performs temperature regulation treatment on the plurality of battery boxes, the flow sensor arranged at the output end of each heat exchanger can detect the output flow value of the cooling liquid flowing out of the heat exchanger corresponding to the flow sensor, so that the subsequent controller can regulate the control valve corresponding to each heat exchanger according to the output flow value corresponding to each heat exchanger, thereby balancing the flow of the cooling liquid flowing through each heat exchanger and ensuring that the heat exchange effects of the plurality of battery boxes are the same.
202. The controller obtains the output flow value corresponding to each heat exchanger, and calculates the maximum output flow difference value among the heat exchangers according to the output flow values.
In the embodiment of the invention, when the plurality of flow sensors detect the output flow values corresponding to each heat exchanger, the controller respectively obtains the output flow values detected by each flow sensor, and calculates the maximum output flow difference value among the plurality of heat exchangers according to the obtained plurality of output flow values, wherein the maximum output flow difference value is the difference value between the maximum output flow value and the minimum output flow value in the plurality of output flow values detected by the plurality of flow sensors.
203. When the maximum output flow difference value is larger than or equal to the preset flow threshold value, the controller adjusts the control valve corresponding to each heat exchanger, so that the maximum output flow difference value among the plurality of heat exchangers is smaller than the preset flow threshold value.
The preset flow threshold is a standard for judging whether the flow of the cooling liquid flowing through each heat exchanger is balanced, and may be but not limited to be set as: 0.03L/min, 0.05L/min, 0.1L/min, and the like.
In the embodiment of the invention, when the maximum output flow difference value among the plurality of heat exchangers is smaller than the preset flow threshold value, the flow balance of the cooling liquid flowing through each heat exchanger can be judged; when the maximum output flow difference value among the plurality of heat exchangers is larger than or equal to the preset flow threshold value, the imbalance of the flow of the cooling liquid flowing through each heat exchanger can be judged, at the moment, the controller can adjust the opening degree of the control valve corresponding to each heat exchanger and change the input flow value corresponding to each heat exchanger, so that the maximum output flow difference value among the plurality of heat exchangers is smaller than the preset flow threshold value, namely, the flow of the cooling liquid flowing through each heat exchanger is balanced.
Compared with the prior art that when temperature adjustment processing is required to be performed on a plurality of battery boxes, a heat source device inputs cooling liquid with appropriate temperature to a heat exchanger corresponding to each battery box, so that the heat exchanger performs heat exchange with the battery device in the corresponding battery box, the embodiment of the invention can detect the output flow value corresponding to each heat exchanger through a plurality of flow sensors when the heat source device performs temperature adjustment processing on the plurality of battery boxes, a controller calculates the maximum output flow difference value among the plurality of heat exchangers according to the output flow value corresponding to each heat exchanger, and when the controller determines that the maximum output flow difference value among the plurality of heat exchangers is larger than or equal to a preset flow threshold value, the controller adjusts a control valve corresponding to each heat exchanger, so that the maximum output flow difference value among the plurality of heat exchangers is smaller than the preset flow threshold value, the flow of the cooling liquid flowing through each heat exchanger is balanced, so that the heat exchange effect of the battery boxes can be ensured to be the same, the battery boxes can work at a proper temperature, the working efficiency of the power battery is improved, and the maximum use performance of the power battery is exerted.
For the purpose of more detailed description, another method for adjusting the temperature of a battery is provided in an embodiment of the present invention, and is applied to a battery thermal management system as shown in fig. 3, where the battery thermal management system includes a plurality of heat exchangers, a heat source device, and a controller, and specifically as shown in fig. 5, the method includes:
301. the controller judges whether to carry out temperature regulation processing on the plurality of battery boxes according to the temperature value corresponding to each heat exchanger.
Each battery box is provided with a temperature detection module, and the temperature detection module can be a temperature sensor; the heat source equipment comprises a driving pump and a cold and heat source; the controller comprises an information acquisition module and a control module.
In the embodiment of the invention, in order to exert the maximum use performance of the power battery, it is required to ensure that a plurality of battery boxes forming the power battery all work at an appropriate temperature, so that the controller needs to acquire the temperature value corresponding to each battery box in real time and judge whether to perform temperature adjustment processing on the plurality of battery boxes according to the temperature value corresponding to each battery box. The following describes in detail how the controller determines whether to perform the temperature adjustment process on the plurality of battery boxes based on the temperature value corresponding to each battery box.
(1) A plurality of temperature detection modules detect the temperature value that each battery box corresponds.
In the embodiment of the invention, the temperature detection module arranged in each battery box can detect the temperature value of the battery equipment in the corresponding battery box in real time, so that the subsequent control module can judge whether to regulate the temperature of the plurality of battery boxes according to the temperature value corresponding to each battery box.
(2) The information acquisition module acquires the temperature value corresponding to each battery box and sends the temperature values to the control module.
In the embodiment of the invention, when the plurality of temperature detection modules detect the temperature value corresponding to each battery box, the information acquisition module respectively acquires the temperature value detected by each temperature detection module and sends the acquired plurality of temperature values to the control module.
(3) The control module judges whether to carry out temperature regulation processing on the plurality of battery boxes according to the plurality of temperature values.
In the embodiment of the invention, after receiving the plurality of temperature values sent by the information acquisition module, the control module judges whether to perform temperature adjustment processing on the plurality of battery boxes according to the plurality of received temperature values. Specifically, the control module may determine whether to perform the temperature adjustment process on the plurality of battery boxes in the following manner:
1. after receiving the plurality of temperature values sent by the information acquisition module, the control module calculates average temperature values corresponding to the plurality of battery boxes according to the plurality of received temperature values, and calculates a maximum temperature difference value between the plurality of battery boxes according to a maximum temperature value and a minimum temperature value in the plurality of temperature values. The average temperature value obtained by calculation is used for judging whether the temperature values corresponding to the plurality of battery boxes are too high or too low; and the maximum temperature difference value obtained by calculation is used for judging whether the temperature among the plurality of battery boxes is balanced or not.
2. After the average temperature values corresponding to the plurality of battery boxes are obtained through calculation, the control module judges whether the average temperature values corresponding to the plurality of battery boxes are smaller than or equal to a first preset temperature threshold value or not, and if the average temperature values corresponding to the plurality of battery boxes are smaller than or equal to the first preset temperature threshold value, the plurality of battery boxes are determined to be subjected to temperature adjustment; if the average temperature values corresponding to the plurality of battery boxes are greater than a first preset temperature threshold value, judging whether the average temperature values corresponding to the plurality of battery boxes are greater than or equal to a second preset temperature threshold value, and if the average temperature values corresponding to the plurality of battery boxes are greater than or equal to the second preset temperature threshold value, determining to perform temperature adjustment processing on the plurality of battery boxes; if the average temperature values corresponding to the plurality of battery boxes are smaller than a second preset temperature threshold value, whether the maximum temperature difference value among the plurality of battery boxes is larger than or equal to a third preset temperature threshold value or not is judged, and if the maximum temperature difference value among the plurality of battery boxes is larger than or equal to the third preset temperature threshold value, the plurality of battery boxes are determined to be subjected to temperature adjustment processing. Namely, when the control module determines that the average temperature values corresponding to the plurality of battery boxes are smaller than or equal to a first preset temperature threshold value, or the average temperature values corresponding to the plurality of battery boxes are larger than or equal to a second preset temperature threshold value, or the maximum temperature difference value between the plurality of battery boxes is larger than or equal to a third preset temperature threshold value through judgment, the control module determines to perform temperature adjustment processing on the plurality of battery boxes. Wherein, the first preset temperature threshold may be set to, but is not limited to: 0 ℃, 3 ℃, 5 ℃ and the like; the second preset temperature threshold may be set, but is not limited to: 30 ℃, 35 ℃, 40 ℃ and the like; the third preset temperature threshold may be set, but is not limited to: 5 ℃, 6 ℃, 7 ℃, etc.
It should be noted that, for different types of battery boxes, the corresponding temperature characteristics are different, and thus the corresponding first preset temperature threshold, second preset temperature threshold, and third preset temperature threshold are also different. Therefore, in the practical application process, a first preset temperature threshold, a second preset temperature threshold, and a third preset temperature threshold corresponding to a plurality of battery boxes need to be preset according to the temperature characteristics of the plurality of battery boxes constituting the power battery.
(3) If yes, the control module controls the cold and hot sources to carry out heat exchange treatment on the cooling liquid according to the plurality of temperature values.
In the embodiment of the invention, when the control module determines to perform temperature adjustment processing on the plurality of battery boxes, the control module controls the cold and hot sources to perform heat exchange processing on the cooling liquid according to the temperature values corresponding to the plurality of battery boxes, that is, the controller controls the cold and hot sources to perform heating processing or cooling processing on the cooling liquid according to the temperature values corresponding to the plurality of battery boxes. Specifically, in this step, the control module may control the cold heat source to perform heat exchange treatment on the cooling liquid according to the average temperature values corresponding to the plurality of battery boxes, but is not limited thereto.
(4) The control module controls the driving pump to be started, so that the cooling liquid flows into each heat exchanger to exchange heat with the battery equipment in each battery box.
In the embodiment of the invention, after the cold and hot sources perform heat exchange treatment on the cooling liquid, the control module can control the driving pump to start, and the cooling liquid with proper temperature respectively flows into each heat exchanger under the driving of the driving pump to perform heat exchange with the battery equipment in each battery box, so that the temperature regulation treatment on the plurality of battery boxes is realized.
It should be noted that, for the embodiment of the present invention, after the step (4), the method further includes: when the control module receives the temperature value corresponding to each battery box again and judges that the temperature adjustment processing of the plurality of battery boxes is not needed according to the plurality of received temperature values again, the control module controls the driving pump to be closed, and therefore the operation of heat exchange between the cooling liquid and the plurality of battery boxes is stopped.
For the embodiment of the present invention, specific application scenarios may be as follows, but are not limited to these scenarios:
the power battery X is composed of a battery box A, a battery box B, a battery box C, a battery box D and a battery box E, wherein heat exchangers are installed on the battery boxes A-E, temperature sensors are arranged in the battery boxes A-E, and a first preset temperature threshold value, a second preset temperature threshold value and a third preset temperature threshold value are preset, wherein the first preset temperature threshold value is 0 ℃, the second preset temperature threshold value is 30 ℃ and the third preset temperature threshold value is 6 ℃. The temperature sensor arranged in each battery box detects the temperature value of the corresponding battery box in real time, and the temperature value corresponding to each battery box is detected in the first time, as shown in table 1:
TABLE 1
Battery box Temperature value
Battery box A 27℃
Battery box B 25℃
Battery box C 23℃
Battery box D 26℃
Battery box E 24℃
At this moment, the information acquisition module respectively acquires the temperature value detected by each temperature sensor, and sends the acquired temperature values to the control module, after receiving the temperature values sent by the information acquisition module, the control module calculates to acquire an average temperature value corresponding to a plurality of battery boxes of 25 ℃ and a maximum temperature difference value between the plurality of battery boxes of 4 ℃, determines that the average temperature value corresponding to the plurality of battery boxes is greater than 0 ℃ and less than 30 ℃ through judgment, and determines that the maximum temperature difference value between the plurality of battery boxes is less than 6 ℃, so that the control module does not need to adjust the temperature of the plurality of battery boxes.
The temperature sensor disposed in each battery box detects a temperature value corresponding to each battery box at the second time, as shown in table 2:
TABLE 2
Battery box Temperature value
Battery box A 35℃
Battery box B 32℃
Battery box C 30℃
Battery box D 31℃
Battery box E 32℃
At this moment, the information acquisition module respectively acquires the temperature value detected by each temperature sensor, and sends the acquired temperature values to the control module, and after receiving the temperature values sent by the information acquisition module, the control module calculates to obtain an average temperature value corresponding to a plurality of battery boxes of 32 ℃ and a maximum temperature difference value between the plurality of battery boxes of 5 ℃. Because the average temperature value corresponding to the plurality of battery boxes is greater than 30 ℃, the control module determines to perform temperature adjustment processing on the plurality of battery boxes: the control module firstly controls the cold and hot sources to carry out heat exchange treatment on the cooling liquid, namely controls the cold and hot sources to carry out cooling treatment on the cooling liquid; then, the driving pump is controlled to be started, the cooling liquid subjected to cooling treatment flows into each heat exchanger respectively under the driving of the driving pump, and heat exchange is carried out between the cooling liquid and each battery box, so that the cooling treatment of the plurality of battery boxes is realized. In the subsequent process, when the control module receives the temperature value corresponding to each battery box again and judges that the temperature adjustment treatment of the plurality of battery boxes is not needed according to the plurality of received temperature values again, the control module controls the driving pump to be closed, and therefore the operation of heat exchange between the cooling liquid and the plurality of battery boxes is stopped.
302. When the heat source device performs temperature adjustment processing on the plurality of battery boxes, the plurality of flow sensors respectively detect an output flow value of the coolant flowing out of each heat exchanger.
In reference to 302, when the heat source device performs temperature adjustment processing on the plurality of battery boxes, the plurality of flow sensors respectively detect an output flow value of the coolant flowing out of each heat exchanger, which may refer to the description of the corresponding portion in fig. 4, and details of the embodiment of the present invention will not be repeated here.
303. The information acquisition module acquires the output flow value corresponding to each heat exchanger and sends the output flow values to the control module.
In the embodiment of the invention, when the plurality of flow sensors detect the output flow value corresponding to each heat exchanger, the information acquisition module respectively acquires the output flow value detected by each flow sensor and sends the acquired output flow values to the control module, so that the subsequent control module can judge whether the flow of the cooling liquid flowing through each heat exchanger is balanced or not according to the output flow value corresponding to each heat exchanger.
304. The control module calculates the maximum output flow difference value among the heat exchangers according to the maximum output flow value and the minimum output flow value in the output flow values.
In the embodiment of the present invention, after receiving the plurality of output flow values sent by the information obtaining module, the control module calculates a maximum output flow difference between the plurality of heat exchangers according to a maximum output flow value and a minimum output flow value of the plurality of received output flow values, that is, calculates a difference between the maximum output flow value and the minimum output flow value to obtain the maximum output flow difference between the plurality of heat exchangers.
305. When the maximum output flow difference value is larger than or equal to the preset flow threshold value, the controller adjusts the control valve corresponding to each heat exchanger, so that the maximum output flow difference value among the plurality of heat exchangers is smaller than the preset flow threshold value.
In the embodiment of the invention, in the process of adjusting the temperature of the plurality of battery boxes, in order to ensure that the heat exchange effects of the plurality of battery boxes are the same, the flow of the cooling liquid flowing through each heat exchanger needs to be ensured to be balanced. When the maximum output flow difference between the plurality of heat exchangers is greater than or equal to a preset flow threshold value, that is, the flow of the cooling liquid flowing through each heat exchanger is unbalanced, the controller needs to adjust the opening degree of the control valve corresponding to each heat exchanger, and the flow of the cooling liquid flowing through each heat exchanger is ensured to be balanced by changing the input flow value corresponding to each heat exchanger. The following will describe in detail how the controller adjusts the control valve corresponding to each heat exchanger so that the maximum output flow difference between the plurality of heat exchangers is smaller than the preset flow threshold.
(1) The control module calculates average output flow values corresponding to the heat exchangers according to the output flow values.
In the embodiment of the invention, when the control module determines that the maximum output flow difference between the plurality of heat exchangers is greater than or equal to the preset flow threshold, the control module calculates the average output flow values corresponding to the plurality of heat exchangers according to the received plurality of output flow values, that is, after the control module sums the plurality of output flow values, the average value of the output flow values is calculated, so that the average output flow values corresponding to the plurality of heat exchangers are obtained.
(2) The control module determines the heat exchanger corresponding to the maximum output flow value.
In the embodiment of the invention, when the information acquisition module respectively acquires the output flow values detected by each flow sensor, the information acquisition module records the mapping relation between each output flow value and the corresponding heat exchanger, and sends the recorded mapping relation and the plurality of output flow values to the control module, so that the control module can determine the heat exchanger corresponding to the maximum output flow value in the plurality of output flow values according to the mapping relation recorded by the information acquisition module.
(3) The control module controls the control valve corresponding to the heat exchanger, and adjusts the input flow value corresponding to the heat exchanger to the average output flow value, so that the maximum output flow difference value among the plurality of heat exchangers is smaller than a preset flow threshold value.
In the embodiment of the invention, after the control module determines the heat exchanger corresponding to the maximum output flow value, the control module adjusts the input flow value corresponding to the heat exchanger to the average output flow value corresponding to the plurality of heat exchangers by adjusting the opening degree of the control valve corresponding to the heat exchanger, so that the maximum output flow difference value corresponding to the plurality of heat exchangers is smaller than the preset flow threshold value, namely, the flow of the cooling liquid flowing through each heat exchanger is balanced.
For the embodiment of the present invention, as shown in fig. 6, the specific working principle of the battery thermal management system for performing the temperature adjustment process on the plurality of battery boxes may be as follows, but is not limited to this, and includes:
1. the temperature value corresponding to each battery box is detected through a plurality of temperature detection modules.
2. The information detection module respectively acquires the temperature value detected by each temperature detection module and sends the acquired temperature values to the control module, and the control module judges whether the temperature values are correct or not according to the received temperature valuesThe plurality of battery boxes are subjected to temperature adjustment, and if so, the step 3 is executed; if not, and the driving pump is in an on state, the control module controls the driving pump to be closed, and the step 1 is executed; if not, and the driving pump is in a closed state, then directly execute step 1, wherein the control module judges whether to carry out temperature adjustment processing on the plurality of battery boxes according to the plurality of temperature values, and specifically, the step can be as follows: the control module calculates average temperature values corresponding to the battery boxes according to the temperature values
Figure BDA0001631740100000181
Calculating the maximum temperature difference delta T between the plurality of battery boxes when the average temperature values corresponding to the plurality of battery boxes are
Figure BDA0001631740100000191
Less than or equal to a first preset temperature threshold value A or average temperature values corresponding to a plurality of battery boxes
Figure BDA0001631740100000192
When the temperature is greater than or equal to a second preset temperature threshold value B or the maximum temperature difference delta T between the multiple battery boxes is greater than or equal to a third preset temperature threshold value C, the control module determines to perform temperature adjustment processing on the multiple battery boxes; when the average temperature values corresponding to a plurality of battery boxes
Figure BDA0001631740100000193
Is greater than a first preset temperature threshold A and the average temperature values corresponding to the plurality of battery boxes
Figure BDA0001631740100000194
And when the maximum temperature difference delta T between the battery boxes is smaller than a second preset temperature threshold value B and the maximum temperature difference delta T between the battery boxes is smaller than a third preset temperature threshold value C, the control module determines that the temperature of the battery boxes is not required to be adjusted.
3. The control module is used for controlling the battery boxes according to the average temperature values corresponding to the plurality of battery boxes
Figure BDA0001631740100000195
Controlling a cold heat source to perform heat exchange treatment on the cooling liquid, andand controlling the driving pump to start, so that the cooling liquid with the proper temperature flows into each heat exchanger to exchange heat with the battery equipment in each battery box.
4. And detecting the output flow value corresponding to each heat exchanger through a plurality of flow sensors.
5. The information detection module respectively acquires output flow values detected by each flow sensor and sends the acquired output flow values to the control module, the control module judges whether the maximum output flow difference value delta F between the heat exchangers is larger than or equal to a preset flow threshold value D or not according to the received output flow values, and if yes, step 6 is executed; if not, go to step 7.
6. The control module calculates average output flow values corresponding to the heat exchangers according to the received output flow values
Figure BDA0001631740100000196
And adjusting the opening degree of the control valve corresponding to the maximum output flow value, and adjusting the input flow value of the heat exchanger corresponding to the control valve to the average output flow value
Figure BDA0001631740100000197
Steps 4, 5 are performed again.
7. And the control module controls each control valve to keep the current opening degree and executes the step 1 again.
Compared with the prior art that when temperature adjustment processing is required to be performed on a plurality of battery boxes, a heat source device inputs cooling liquid with appropriate temperature to a heat exchanger corresponding to each battery box, so that the heat exchanger performs heat exchange with the battery device in the corresponding battery box, the embodiment of the invention can detect the output flow value corresponding to each heat exchanger through a plurality of flow sensors when the heat source device performs temperature adjustment processing on the plurality of battery boxes, a controller calculates the maximum output flow difference value among the plurality of heat exchangers according to the output flow value corresponding to each heat exchanger, and when the controller determines that the maximum output flow difference value among the plurality of heat exchangers is larger than or equal to a preset flow threshold value, the controller adjusts a control valve corresponding to each heat exchanger, so that the maximum output flow difference value among the plurality of heat exchangers is smaller than the preset flow threshold value, the flow of the cooling liquid flowing through each heat exchanger is balanced, so that the heat exchange effect of the battery boxes can be ensured to be the same, the battery boxes can work at a proper temperature, the working efficiency of the power battery is improved, and the maximum use performance of the power battery is exerted. Meanwhile, the temperature value corresponding to each battery box can be detected through the plurality of temperature detection modules, when the controller determines to perform temperature adjustment processing on the plurality of battery boxes according to the temperature value corresponding to each battery box, the controller controls the cold and hot sources to perform heat exchange processing on the cooling liquid according to the temperature values corresponding to the plurality of battery boxes, and controls the driving pump to be started, so that the cooling liquid with the appropriate temperature flows into each heat exchanger to perform heat exchange with the battery equipment in each battery box, the temperature adjustment processing on the plurality of battery boxes can be performed in time, and the processing efficiency of the temperature adjustment processing on the plurality of battery boxes is improved.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
It will be appreciated that the relevant features of the method and apparatus described above are referred to one another. In addition, "first", "second", and the like in the above embodiments are for distinguishing the embodiments, and do not represent merits of the embodiments.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
The algorithms and displays presented herein are not inherently related to any particular computer, virtual machine, or other apparatus. Various general purpose systems may also be used with the teachings herein. The required structure for constructing such a system will be apparent from the description above. Moreover, the present invention is not directed to any particular programming language. It is appreciated that a variety of programming languages may be used to implement the teachings of the present invention as described herein, and any descriptions of specific languages are provided above to disclose the best mode of the invention.
In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be interpreted as reflecting an intention that: that the invention claimed requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.
Those skilled in the art will appreciate that the modules in the device in an embodiment may be adaptively changed and disposed in one or more devices different from the embodiment. The modules or units or components of the embodiments may be combined into one module or unit or component, and furthermore they may be divided into a plurality of sub-modules or sub-units or sub-components. All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or elements of any method or apparatus so disclosed, may be combined in any combination, except combinations where at least some of such features and/or processes or elements are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.
Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the following claims, any of the claimed embodiments may be used in any combination.
The various component embodiments of the invention may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. It will be appreciated by those skilled in the art that a microprocessor or Digital Signal Processor (DSP) may be used in practice to implement some or all of the functions of some or all of the components of the battery thermal management system and method of regulating battery temperature in accordance with embodiments of the present invention. The present invention may also be embodied as apparatus or device programs (e.g., computer programs and computer program products) for performing a portion or all of the methods described herein. Such programs implementing the present invention may be stored on computer-readable media or may be in the form of one or more signals. Such a signal may be downloaded from an internet website or provided on a carrier signal or in any other form.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.

Claims (14)

1. A battery thermal management system, comprising:
the heat exchangers are arranged on the corresponding battery boxes and used for adjusting the temperature of battery equipment in the battery boxes, a control valve is arranged at the input end of each heat exchanger and used for adjusting the input flow value of cooling liquid flowing into the heat exchangers, and a flow sensor is arranged at the output end of each heat exchanger and used for detecting the output flow value of the cooling liquid flowing out of the heat exchangers;
the heat source equipment is arranged outside the battery box, the input end of the heat source equipment is respectively connected to the output end of each heat exchanger, the output end of the heat source equipment is respectively connected to the input end of each heat exchanger, and the heat source equipment is used for respectively inputting the cooling liquid into each heat exchanger to enable the heat exchangers to exchange heat with the battery equipment in the battery box;
the controller is arranged outside the battery box, the input end of the controller is connected to the output end of each flow sensor, the output end of the controller is connected to the input end of each control valve, the controller is used for obtaining the output flow value detected by each flow sensor, the difference value between the maximum output flow value and the minimum output flow value in the output flow values is the maximum output flow difference value between the heat exchangers, and when the maximum output flow difference value is larger than or equal to a preset flow threshold value, the controller adjusts the control valves to enable the maximum output flow difference value between the heat exchangers to be smaller than the preset flow threshold value.
2. The battery thermal management system of claim 1,
the heat source equipment comprises a driving pump and a cold and heat source, wherein the input end of the driving pump is connected with the output end of the cold and heat source, the output end of the driving pump is respectively connected with the input end of each heat exchanger, the input end of the cold and heat source is respectively connected with the output end of each heat exchanger, the driving pump is used for providing power for the plurality of heat exchangers to input the cooling liquid, and the cold and heat source is used for carrying out heat exchange treatment on the cooling liquid so as to adjust the temperature of the cooling liquid.
3. The battery thermal management system of claim 2,
the controller comprises an information acquisition module and a control module, wherein the input end of the information acquisition module is connected to the output end of each flow sensor, the output end of the information acquisition module is connected to the input end of the control module, the output end of the control module is connected to the input end of each control valve, the information acquisition module is used for acquiring the output flow value detected by each flow sensor and sending the output flow values to the control module, and the control module is used for adjusting the control valves according to the output flow values when the maximum output flow difference between the output flow values is larger than or equal to the preset flow threshold value, so that the maximum output flow difference between the heat exchangers is smaller than the preset flow threshold value.
4. The battery thermal management system of claim 3,
each battery box is provided with a temperature detection module, the output end of each temperature detection module is connected to the input end of the information acquisition module, the temperature detection module is used for detecting the temperature value of the battery equipment in the battery box, and the information acquisition module is also used for acquiring the temperature value detected by each temperature detection module and sending the temperature values to the control module; the output end of the control module is further connected to the input end of the driving pump, the control module is further used for judging whether the battery boxes are subjected to temperature regulation according to a plurality of temperature values, and when the control module determines that the battery boxes are subjected to temperature regulation according to judgment, the control module controls the driving pump to be started.
5. The battery thermal management system of claim 4,
the output end of the control module is further connected to the input end of the cold and heat source, and the control module is further used for controlling the cold and heat source to perform heat exchange treatment on the cooling liquid according to the plurality of temperature values.
6. The battery thermal management system of claim 5,
the cold and heat source is a heat exchanger.
7. The battery thermal management system of claim 6,
the temperature detection module is a temperature sensor.
8. The battery thermal management system of any of claims 1-7, further comprising:
the alarm, the input of alarm connect in the output of controller, the controller is still used for when the maximum output flow difference is greater than or equal to and predetermines the flow threshold value, control the alarm sends the warning.
9. A method for regulating the temperature of a battery, wherein the method is applied to the battery thermal management system according to any one of claims 1 to 8, and the method comprises the following steps:
when the heat source equipment carries out temperature regulation treatment on the plurality of battery boxes, the plurality of flow sensors respectively detect the output flow value of the cooling liquid flowing out of each heat exchanger;
the controller acquires an output flow value corresponding to each heat exchanger and calculates a maximum output flow difference value among the heat exchangers according to the output flow values, wherein the maximum output flow difference value is the difference value between the maximum output flow value and the minimum output flow value in the output flow values;
when the maximum output flow difference value is larger than or equal to a preset flow threshold value, the controller adjusts the control valve corresponding to each heat exchanger, so that the maximum output flow difference value among the plurality of heat exchangers is smaller than the preset flow threshold value.
10. The method according to claim 9, wherein a temperature detection module is provided in each of the battery boxes, the heat source device includes a driving pump, and the controller includes an information acquisition module and a control module; before the plurality of flow sensors respectively detect the output flow values of the coolant flowing out of each heat exchanger when the heat source device performs the temperature adjustment process on the plurality of battery boxes, the method further includes:
the temperature detection modules detect the temperature value corresponding to each battery box;
the information acquisition module acquires a temperature value corresponding to each battery box and sends the temperature values to the control module;
the control module judges whether to regulate the temperature of the battery boxes according to the temperature values;
if yes, the control module controls the driving pump to be started, so that the cooling liquid flows into each heat exchanger to exchange heat with the battery equipment in each battery box.
11. The method of claim 10, wherein the determining, by the control module, whether to perform the temperature adjustment process on the plurality of battery boxes according to the plurality of temperature values comprises:
the control module calculates average temperature values corresponding to the battery boxes according to the temperature values, and calculates maximum temperature difference values among the battery boxes according to the maximum temperature value and the minimum temperature value in the temperature values;
judging whether the average temperature value is less than or equal to a first preset temperature threshold value or not;
if the average temperature value is smaller than or equal to the first preset temperature threshold value, determining to perform temperature adjustment processing on the plurality of battery boxes;
if the average temperature value is greater than the first preset temperature threshold value, judging whether the average temperature value is greater than or equal to a second preset temperature threshold value;
if the average temperature value is greater than or equal to a second preset temperature threshold value, determining to perform temperature adjustment processing on the plurality of battery boxes;
if the average temperature value is smaller than the second preset temperature threshold value, judging whether the maximum temperature difference value is larger than or equal to a third preset temperature threshold value;
if the maximum temperature difference value is larger than or equal to the third preset temperature threshold value, determining to perform temperature adjustment processing on the plurality of battery boxes;
wherein the second preset temperature threshold is greater than the first preset temperature threshold.
12. The method of claim 11, wherein the controller obtains an output flow value for each of the heat exchangers and calculates a maximum output flow difference between the plurality of heat exchangers based on the plurality of output flow values, comprising:
the information acquisition module acquires an output flow value corresponding to each heat exchanger and sends the output flow values to the control module;
and the control module calculates the maximum output flow difference value among the heat exchangers according to the maximum output flow value and the minimum output flow value in the output flow values.
13. The method of claim 12, wherein the controller adjusting the control valve associated with each heat exchanger such that the maximum output flow difference between the plurality of heat exchangers is less than the preset flow threshold comprises:
the control module calculates average output flow values corresponding to the heat exchangers according to the output flow values;
the control module determines a heat exchanger corresponding to the maximum output flow value;
the control module controls the control valve corresponding to the heat exchanger, and adjusts the input flow value corresponding to the heat exchanger to the average output flow value, so that the maximum output flow difference value among the heat exchangers is smaller than the preset flow threshold value.
14. The method of any one of claims 10-13, wherein the heat source device further comprises a cold heat source; before the control module controls the driving pump to be started to enable the cooling liquid to flow into each heat exchanger to exchange heat with the battery equipment in each battery box, the method further comprises the following steps:
the control module controls the cold and hot sources to carry out heat exchange treatment on the cooling liquid according to the plurality of temperature values.
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