CN114976372A - Battery energy storage system and electric automobile - Google Patents
Battery energy storage system and electric automobile Download PDFInfo
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- CN114976372A CN114976372A CN202110199884.8A CN202110199884A CN114976372A CN 114976372 A CN114976372 A CN 114976372A CN 202110199884 A CN202110199884 A CN 202110199884A CN 114976372 A CN114976372 A CN 114976372A
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- 238000004146 energy storage Methods 0.000 title claims abstract description 75
- 238000001514 detection method Methods 0.000 claims description 10
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- 230000000694 effects Effects 0.000 description 10
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- 230000036541 health Effects 0.000 description 6
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
- B60L58/26—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by cooling
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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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/63—Control systems
- H01M10/635—Control systems based on ambient temperature
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6561—Gases
- H01M10/6566—Means within the gas flow to guide the flow around one or more cells, e.g. manifolds, baffles or other barriers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6567—Liquids
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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Abstract
The application provides a battery energy storage system and an electric automobile. The battery energy storage system comprises a shell, a battery module, a temperature control assembly and a flow guide part. The inner part of the shell is provided with a spoiler which divides the inner space of the shell into a first space and a second space which are independent mutually. The battery module includes module casing and electric core, and the both ends of module casing have respectively with the first opening of first space intercommunication and with the second opening of second space intercommunication, the module casing sets up on the spoiler. The temperature control component is arranged on the shell, a temperature control channel and a heat exchange device located inside the temperature control channel are arranged inside the temperature control component, two ends of the temperature control channel are respectively provided with a first circulation port communicated with the first space and a second circulation port communicated with the second space, and the first space, the inner space of the module shell, the second space and the temperature control channel form a circulation channel. The flow guide part is arranged in the circulating channel and used for guiding the heat exchange medium in the circulating channel to flow along the first direction or the second direction.
Description
Technical Field
The application relates to the technical field of battery energy storage, in particular to a battery energy storage system and an electric automobile.
Background
The battery energy storage has the characteristics of high flexibility, high reliability and high energy density, and is rapidly developed on the power utilization side and the power generation side along with the rapid reduction of the battery cost, wherein the installed capacity is greatly improved, and the cruising ability is increasingly enhanced. In large-scale commercial energy storage, the heat dissipation space must be compressed in order to pursue high power density of the product. Embody in battery system and pile up for a plurality of battery module and arrange, battery module inside electric core also piles up and arranges, this will have inevitable heat accumulation, leads to the difference in temperature between the inside electric core of battery module too big. After long-term operation, there is obvious difference in the battery health degree (state of health, SOH) of the electric core of high temperature and microthermal electric core, and the capacity of battery module is restricted in the electric core that its inside battery health degree is minimum, and this just leads to the usable capacity of battery module to reduce, and then leads to the whole income of battery system to descend thereupon.
Disclosure of Invention
The application provides a battery energy storage system and electric automobile to reduce the temperature difference between the inside electric core of battery module.
In a first aspect, the present application provides a battery energy storage system, including a housing, a battery module, a temperature control assembly, and a flow guide part; a spoiler is arranged in the shell and divides the inner space of the shell into a first space and a second space which are independent of each other; the battery module comprises a module shell and a battery cell arranged in the module shell, wherein a first opening and a second opening are respectively arranged at two ends of the module shell, the module shell is arranged on the spoiler, the first opening is communicated with the first space, and the second opening is communicated with the second space; the temperature control assembly is arranged on the shell, a temperature control channel and a heat exchange device are arranged in the temperature control assembly, the heat exchange device is positioned in the temperature control channel, a first circulation port and a second circulation port are respectively arranged at two ends of the temperature control channel, the first circulation port is communicated with the first space, the second circulation port is communicated with the second space, and the first space, the inner space of the module shell, the second space and the temperature control channel form a circulation channel; the flow guide part is arranged in the circulating channel and used for guiding the heat exchange medium in the circulating channel to flow along a first direction or a second direction, and the first direction is opposite to the second direction.
According to the technical scheme provided by the application, a heat exchange medium flows into the inner space of the module shell to exchange heat with the electric core in the module shell, so as to realize temperature regulation and control of the electric core in the module shell, the flow direction of the heat exchange medium is variable under the drive of the flow guide part, the flow direction of the heat exchange medium in the circulating channel is a first direction, the first direction can be the direction of sequentially flowing through a temperature control channel, a first space, the inner space of the module shell, a second space and a temperature control channel, the flow direction of the heat exchange medium in the circulating channel can be a second direction, the second direction is opposite to the first direction, the second direction can be the direction of sequentially flowing through the temperature control channel, the second space, the inner space of the module shell, the first space and the temperature control channel, namely, the heat exchange medium can be changed to flow in the opposite direction in the circulating channel under the drive of the flow guide part, can strengthen the holistic cooling effect to the inside electric core of battery module, effectively reduce the temperature difference between the inside electric core of battery module, promote the temperature homogeneity between the electric core, alleviate high temperature electric core heat accumulation to extension electric core life promotes the capacity in the battery module life cycle, guarantees the holistic energy storage income of battery system.
In a specific embodiment, the flow guide is arranged in the temperature-controlled channel. The water conservancy diversion portion can more directly guide heat transfer medium to flow out or flow in the control by temperature change passageway for heat transfer medium flows through the speed of control by temperature change passageway, provides heat transfer medium for the battery module fast, improves the heat exchange efficiency of the inside electric core of battery module.
In a particular embodiment, the flow guide is arranged at the first opening. The water conservancy diversion portion can more directly guide heat transfer medium to flow out or flow in module casing inner space for heat transfer medium flows through the speed of module casing inner space, provides heat transfer medium for electric core fast, can make the heat exchange efficiency of electric core effectively improve.
In a specific embodiment, the first and second flow ports are located on the same side of the spoiler; the battery energy storage system further comprises a flow guide channel, one end of the flow guide channel is communicated with the first circulation port, and the other end of the flow guide channel is communicated with the first space. When the first circulation opening and the first space of control by temperature change passageway were located the different sides of spoiler respectively, can communicate the first circulation opening and the first space of control by temperature change passageway through the water conservancy diversion passageway, the setting of water conservancy diversion passageway for first circulation opening and second circulation opening can be located the same one side of spoiler, and the control by temperature change passageway of being convenient for designs the structural style for side-mounted air conditioner together with heat transfer device and other relevant components.
When the flow guide channel is arranged specifically, the flow guide channel comprises at least one flow guide plate, the at least one flow guide plate is enclosed into a channel-shaped structure, and the flow guide channel is convenient to form; or/and more than one guide plate and the inner wall of the shell form a channel-shaped structure in a surrounding mode, the guide plates and the inner wall of the shell can jointly form a guide channel, the material consumption of the guide plates can be saved, and the guide plates can be flexibly combined with the shell structure.
Besides the above-mentioned way of arranging the flow guide part, other ways can be adopted, such as arranging the flow guide part in the flow guide channel. The water conservancy diversion portion can more directly guide heat transfer medium to flow out or flow in first space, can improve the heat exchange efficiency of the inside electric core of battery module.
In a specific embodiment, the first and second vents are located on either side of the spoiler. The temperature control channel, the heat exchange device and other related components are designed into a structural form of a top-mounted air conditioner conveniently.
In a specific implementation scheme, the number of the battery modules is multiple, so that the overall capacity of the battery energy storage system can be improved, the battery modules are arranged at intervals, and the heat dissipation interference among the battery modules is small.
When the internal structure of the module shell is specifically arranged, a first module channel, a second module channel and a third module channel are arranged in the module shell; one end of the first module channel is communicated with the first space, and the other end of the first module channel is closed; one end of the second module channel is communicated with the second space, the other end of the second module channel is closed, and the second module channel and the first module channel are arranged in parallel; the both ends of third module passageway communicate with first module passageway and second module passageway respectively, and third module passageway sets up between adjacent electric core. First module passageway, second module passageway and a plurality of third module passageway form the inside heat transfer passageway network of module casing, and the heat transfer medium temperature that flows into every third module passageway is close relatively, can reduce the difference in temperature between the electric core.
Except the above mode of setting up module casing inner structure, can also adopt other modes, like the inside fourth module passageway that is provided with of module casing, the both ends of fourth module passageway communicate with first space and second space respectively, and fourth module passageway sets up between adjacent electric core. Being provided with of fourth module passageway does benefit to heat transfer medium's quick flow, can reduce near module casing first end and near module casing second end near the heat transfer medium difference in temperature to reduce the difference in temperature between the electric core that is close to module casing first end and the electric core that is close to module casing second end.
In a specific possible embodiment, the battery energy storage system further comprises a control part and a temperature detection device; the temperature detection device is arranged in the module shell and used for detecting the temperature difference between the battery cores at the two ends of the module shell; the control part is arranged on the shell and connected with the temperature detection device and used for controlling the flow guide part to guide the heat exchange medium in the circulating channel to flow along the first direction or the second direction according to the temperature difference between the battery cores. Temperature-detecting device can detect the difference in temperature between the electric core that is located module casing both ends, and the control part can receive the difference in temperature information that temperature-detecting device detected to according to predetermineeing condition control water conservancy diversion portion corotation or reversal, the heat transfer medium of guide circulation in the passageway flows along first direction or second direction, realizes the initiative accuse temperature to the inside electric core of module casing, promotes battery energy storage system's intelligent degree.
In a second aspect, the present application provides an electric vehicle, which includes the battery energy storage system as described above, and a power system, where the battery energy storage system is used to supply power to the power system, and the power system is used to drive the electric vehicle to run. The battery energy storage system has stable capacity and long service life, can reliably supply power to the power system, and improves the reliability and safety of the work of the electric automobile.
Drawings
Fig. 1 is a schematic structural diagram of a battery energy storage system according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a first opening in a battery energy storage system according to an embodiment of the present disclosure;
fig. 3 is another schematic structural diagram of a first opening in a battery energy storage system according to an embodiment of the present disclosure;
fig. 4 is a schematic view of a flow direction of a heat exchange medium of a battery energy storage system provided in an embodiment of the present application;
fig. 5 is a schematic view illustrating another flow direction of a heat exchange medium of a battery energy storage system according to an embodiment of the present application;
fig. 6 is another schematic structural diagram of a battery energy storage system according to an embodiment of the present disclosure;
fig. 7 is another schematic structural diagram of a battery energy storage system according to an embodiment of the present disclosure;
fig. 8 is another schematic structural diagram of a battery energy storage system according to an embodiment of the present disclosure;
fig. 9 is another schematic structural diagram of a battery energy storage system according to an embodiment of the present disclosure;
fig. 10 is another schematic structural diagram of a battery energy storage system according to an embodiment of the present disclosure;
fig. 11 is another schematic structural diagram of a battery energy storage system according to an embodiment of the present disclosure;
fig. 12 is a schematic side view of a battery energy storage system according to an embodiment of the present disclosure;
fig. 13 is another schematic structural diagram of a battery energy storage system according to an embodiment of the present disclosure;
fig. 14 is a schematic view illustrating another flow direction of a heat exchange medium of the battery energy storage system according to the embodiment of the present application;
fig. 15 is a schematic diagram illustrating an internal structure of a module housing in a battery energy storage system according to an embodiment of the present disclosure;
fig. 16 is a schematic view illustrating a flow direction of a heat exchange medium of the battery energy storage system in the module housing according to the embodiment of the present application;
fig. 17 is a schematic view of another internal structure of a module housing in a battery energy storage system according to an embodiment of the present disclosure.
Reference numerals:
100-a housing; 200-a spoiler; 300-a module housing; 400-a temperature control assembly; 500-a flow guide part; 600-a flow guide channel; 700-electric core; 800-a control section; 101-a first space; 102-a second space; 301-a first opening; 302-a second opening; 303-a first module channel; 304-a second module channel; 305-a third module channel; 306-a fourth module channel; 401-a first circulation port; 402-a second flow port; 403-temperature control channel; 404-heat exchange means; 405-a deflector plate; 601-baffle.
Detailed Description
For convenience of understanding, an application scenario of the battery energy storage system related to the embodiment of the present application is first described. The battery energy storage system that this application embodiment provided can be applied to the electric automobile field, provides the electric energy for electric automobile whole car, realizes that electric automobile traveles. In order to improve the power density, the battery energy storage system generally includes a plurality of battery modules, and a plurality of battery modules are stacked and arranged, and each battery module includes a plurality of cells stacked and arranged inside, and the heat dissipation space of the system is compressed relatively, so that there is inevitably a cascading effect of heat, thereby resulting in a temperature difference between different cells. Due to heat accumulation, the temperature of the high-temperature battery cell continuously rises along with the time, the temperature difference between the high-temperature battery cell and the low-temperature battery cell is continuously increased, and the difference between the high-temperature battery cell and the low-temperature battery cell in the aspect of the health degree of the battery is more and more obvious. The available capacity of the battery module is restricted by the electric core with the lowest battery health degree, so that the available capacity of the battery module is reduced, and the whole capacity of the battery energy storage system is reduced.
Based on this, this application embodiment provides a battery energy storage system, and this battery energy storage system can reduce the temperature difference between the inside electric core of battery module, and then reduces the difference of each electric core health degree, guarantees the capacity of battery module in life cycle. The embodiments of the present application will be described in detail below with reference to the accompanying drawings.
Referring to fig. 1 first, fig. 1 shows a schematic structural diagram of a battery energy storage system provided in an embodiment of the present application. As shown in fig. 1, the battery energy storage system provided by the embodiment includes a housing 100, and a spoiler 200 is disposed inside the housing 100, and the spoiler 200 divides an internal space of the housing 100 into a first space 101 and a second space 102 that are independent of each other. Be provided with one or more battery module on the spoiler 200, the battery module includes module casing 300 and sets up the electric core inside module casing 300. The first end of the module case 300 may be provided with a first opening, the second end of the module case 300 may be provided with a second opening, and the inner space of the module case 300 is communicated with the outer space of the module case 300 through the first opening and the second opening, and in particular, the first opening may be communicated with the first space 101, and the second opening may be communicated with the second space 102.
With continuing reference to fig. 2 and fig. 3, fig. 2 shows a schematic structural diagram of the first opening in the battery energy storage system provided in the embodiment of the present application, and fig. 3 shows another schematic structural diagram of the first opening in the battery energy storage system provided in the embodiment of the present application. As shown in fig. 2, the first opening 301 of the module case 300 may have a hole structure. Alternatively, as shown in fig. 3, the first opening 301 may have a grid-like structure. It is understood that the first opening 301 may have other structures capable of circulating the heat exchange medium. The second openings may also have a hole-like structure, a grid-like structure, or the like. The holes, or the grid structure, etc. may be formed on the module housing 300 by a material removing process. In particular, the first opening 301 may be located in the first space and the second opening may be located in the second space, so that the first space and the second space can communicate with each other through the inner space of the module case 300. The module case 300 may further include other openings besides the first opening 301 and the second opening to increase the flow rate of the heat exchange medium, and the other openings may be disposed on the side surface of the module case 300 near the end of the module case 300, and the other openings may be disposed in the first space or the second space.
Referring again to fig. 1, the spoiler 200 of the present embodiment may be vertically disposed within the casing 100 such that the first space 101 and the second space 102 are located at left and right sides of the spoiler 200, respectively. When the spoiler 200 is provided with a plurality of battery modules, the plurality of battery modules may be arranged at intervals in the length direction or the width direction of the spoiler 200, and in addition, the plurality of battery modules may be arranged in one row or in a plurality of rows spaced from each other. For example, when the spoiler 200 is vertically disposed within the housing 100, a plurality of battery modules may be vertically stacked and arranged in a line, or stacked and arranged in a plurality of lines spaced apart from each other.
The battery module can be installed inside the casing 100 through the mounting bracket, and the spoiler 200 can be arranged on the mounting bracket, i.e. the spoiler 200 is integrated with the mounting bracket, and the spoiler 200 cooperates with the mounting bracket to divide the internal space of the casing 100 into the first space 101 and the second space 102 which are independent of each other. In a specific implementation, the mounting bracket may be of a columnar structure, and the columnar mounting brackets may be arranged in close proximity to divide the internal space of the casing 100 into the first space 101 and the second space 102 which are independent from each other, so that it is not necessary to separately provide another baffle plate 200; alternatively, the mounting bracket may have a plate-shaped structure, and the plate-shaped mounting bracket divides the inner space of the casing 100 into the first space 101 and the second space 102, which are independent of each other, and in this case, it is not necessary to separately provide the baffle plate 200.
The housing 100 of this embodiment is further provided with a temperature control assembly 400, the temperature control assembly 400 has a temperature control channel 403 therein, a first end of the temperature control channel 403 may be provided with a first through hole 401, and a second end of the temperature control channel 403 may be provided with a second through hole 402. In one embodiment, the first communication port 401 may be in communication with the first space 101, and the second communication port 402 may be in communication with the second space 102, such that the first space 101 and the second space 102 can communicate with each other through the temperature controlled channel 403. The first space 101 and the second space 102 described above in conjunction can communicate with each other through the internal space of the module case 300, and as a whole, the first space 101, the internal space of the module case 300, the second space 102, and the temperature control passage 403 together constitute a closed circulation passage. The circulating channel is filled with a heat exchange medium which can circulate in the circulating channel.
In which the casing 100 is closed and the temperature controlled passage 403 is also closed, so that the circulation passage is closed as a whole. The circulation channel is not communicated with the outside, so that the heat exchange reliability can be improved, the heat exchange energy consumption is reduced, and in addition, the phenomenon that external dirty impurities and the like enter the circulation channel to influence the performance of the battery cell can be avoided. The heat exchange medium can be air or other gases or a mixture of air and other gases. When the heat exchange medium is gas, a reversible axial fan or the like may be used as the guide part 500.
A heat exchanging device 404 is arranged in the temperature control channel 403 of the embodiment, and the heat exchanging device 404 may have a refrigerating function or a heating function. The refrigeration function is used for cooling heat transfer medium, and then makes heat transfer medium cool down the inside electric core of battery module when the circulation flows. The heating function is used for heating heat transfer medium, and then makes heat transfer medium heat up the inside electric core of battery module when the circulation flows, for example when external environment temperature is lower, if the battery module has stood a period of time, then the temperature of the inside electric core of battery module is lower, and the inside electric core of battery module can work more reliably after suitable heating. In a specific implementation, when the heat exchange medium is a gas, the heat exchange device 404 may be an evaporator, a thermoelectric cooling device, or the like. The heat exchange devices 404 in the temperature control channel 403 may be multiple, and the multiple heat exchange devices 404 may be selectively opened according to the temperature conditions of the battery core, for example, when the temperature of the battery core is very high, multiple or all of the heat exchange devices 404 may be opened to cool the battery core, and when the temperature of the battery core is relatively high, one or more of the heat exchange devices 404 may be opened to cool the battery core, so that the overall energy consumption of the battery system is reduced on the premise of ensuring the heat exchange effect.
In some embodiments, the temperature-controlled channel 403 may be fixedly connected to a side of the housing 100, and the first communication port 401 and the second communication port 402 of the temperature-controlled channel 403 may be located on the same side of the spoiler 200, for example, the first communication port 401 and the second communication port 402 are both located in the second space 102, wherein the first communication port 401 may communicate with the first space 101 through the diversion channel 600, and the second communication port 402 may communicate with the second space 102 directly. In specific implementation, the temperature control channel 403, the heat exchanging device 404 and other related components may be designed as an air conditioning module and integrated with the casing 100. In combination with the position of the temperature control channel 403 on the casing 100, when the temperature control channel 403 is fixedly connected to the side of the casing 100, the temperature control channel 403, together with the heat exchanging device 404 and other related components, can be designed as a side-mounted air conditioner.
The flow guiding channel 600 of this embodiment may be a channel-shaped structure, the flow guiding channel 600 may be defined by one or more flow guiding plates 601, the flow guiding channel 600 may also be defined by one or more flow guiding plates 601 and the inner wall of the casing 100, the flow guiding channel 600 may also be defined by one or more flow guiding plates 601 in a partial section, and the partial section is defined by one or more flow guiding plates 601 and the inner wall of the casing 100. During specific implementation, the guide plate 601 can be made of metal plates.
It should be noted that, the diversion channel 600 may also adopt a closed pipeline, the first circulation port 401 of the temperature control assembly and the first opening of the battery module may be directly connected through a closed pipeline, the second circulation port of the battery module and the temperature control assembly may also be directly connected through a closed pipeline, so that the temperature control channel is directly communicated with the internal space of the battery module through a closed pipeline, the temperature control channel, the closed pipeline and the internal space of the battery module form a closed circulation channel, the heat exchange medium does not flow through the first space 101 and the second space 102, and the heat exchange efficiency and the heat exchange strength of the internal electric core of the battery module can be improved.
The circulation channel of this embodiment is provided with water conservancy diversion portion 500 in, and water conservancy diversion portion 500 can set up the optional position in circulation channel, and water conservancy diversion portion 500 during operation can drive heat transfer medium and flow in circulation channel. The heat transfer medium flows into the internal space of the module shell 300, flows through the gap between the battery cells, exchanges heat with the internal battery cell of the module shell 300, and realizes temperature regulation and control of the internal battery cell of the module shell 300. In addition, the flow guide part 500 is capable of changing the direction of the heat transfer medium, so that the flow direction of the heat transfer medium in the circulation channel can be a first direction, the first direction can be specifically the direction of the heat transfer medium flowing through the "temperature control channel 403-the first space 101-the internal space of the module case 300-the second space 102-the temperature control channel 403" in sequence, and the flow direction of the heat transfer medium can be defined as the forward direction; the flow guide part 500 may also allow the heat exchange medium to flow in the circulation channel in a second direction, which may specifically be a direction sequentially passing through the "temperature control channel 403, the second space 102, the internal space of the module case 300, the first space 101, and the temperature control channel 403", which may define that the flow direction of the heat exchange medium is reverse, that is, the heat exchange medium may flow in the circulation channel in a forward direction or in a reverse direction under the driving of the flow guide part 500. Compared with the design that the heat exchange medium can only flow in a single direction, the scheme that the heat exchange medium can flow in a reversing manner in the embodiment can avoid the defect that the battery cell at the downstream of the flow direction of the heat exchange medium can not be effectively heat exchanged all the time. From this, can strengthen the cooling effect to the inside electric core of battery module, effectively reduce the temperature difference between the inside electric core of battery module, promote the temperature homogeneity between the electric core, alleviate high temperature electric core heat accumulation to extension electric core life-span.
It can be understood that when the battery module quantity that sets up on spoiler 200 is a plurality of, can reach the purpose that reduces the difference in temperature between the inside electric core of battery module equally. If the temperature control conditions of the temperature control assembly 400 are the same, the temperature difference between the battery cores in the battery module is reduced, the capacity of the battery module in the life cycle can be improved, and the overall energy storage benefit of the battery system is effectively ensured; if guarantee that the capacity in the battery module life cycle is unchangeable basically, reduce the temperature difference between the inside electric core of battery module, can reduce the battery module energy consumption, and then reduce the whole energy consumption of battery system to reduce initial investment.
In some embodiments, the flow guide 500 may be provided on the module case 300. In an implementation, the flow guiding portion 500 may be disposed at the second opening of the module housing 300. Flow guide portion 500 is closer to the inside electric core of module casing 300, can comparatively effectively, directly guide heat transfer medium forward or backward flow through the inside space of module casing 300, carries out the heat transfer with the inside electric core of module casing 300.
In some embodiments, the battery energy storage system further includes a control part 800 and a temperature detection device, the control part 800 is disposed on the temperature control assembly 400, the housing 100 or the battery module, and the temperature detection device is disposed inside the module housing 300 or in the circulation channel. The temperature detection device can detect the temperature of the heat exchange medium, the control part 800 receives temperature information detected by the temperature detection device, controls the flow guide part 500 to rotate forwards or backwards according to preset conditions, guides the heat exchange medium in the circulation channel to flow forwards or backwards, and achieves active temperature control.
In specific implementation, when temperature-detecting device sets up inside module casing 300, temperature-detecting device can also be used to detect electric core temperature, can set up temperature-detecting device simultaneously at the both ends of module casing 300 this moment to real-time supervision is close to the difference in temperature between the electric core at module casing 300 both ends, and when the difference in temperature was greater than the default, control portion 800 controls the action of water conservancy diversion portion 500, changes heat transfer medium's flow direction. For example, when heat transfer medium forward flow was cooled down to the inside electric core of module casing 300 in circulation channel, under the effect of water conservancy diversion portion 500, heat transfer medium can be by the first end flow direction module casing 300's of module casing 300 the second end, because the electric core that is close to the first end of module casing 300 is in the upper reaches of heat transfer medium flow direction, heat transfer medium cools off the electric core of the first end that is close to module casing 300 earlier, the temperature has risen relatively when flowing to the second end that is close to module casing 300, the cooling effect to the electric core of the second end that is close to module casing 300 will weaken, the event is close to the temperature of the electric core of the second end of module casing 300 and can be higher than the electric core that is close to the first end of module casing 300; based on the temperature information that the temperature-detecting device who sets up in the first end of module casing 300 and second end detected, control portion 800 calculates the difference in temperature between the first end that draws close to module casing 300 and the electric core of second end, and when judging whether the difference in temperature is greater than the default, when the difference in temperature is greater than the default, control portion 800 controls the reversal of water conservancy diversion portion 500, make heat transfer medium reverse flow in circulation channel, that is, heat transfer medium's flow direction becomes to be held to flow direction module casing 300 first end by module casing 300 second, thereby realize the control to the difference in temperature.
As shown in fig. 4, fig. 4 is a schematic view illustrating a flow direction of a heat exchange medium of a battery energy storage system provided by an embodiment of the present application. When the heat exchange medium flows in the circulation channel in the forward direction, the heat exchange medium can flow into the first space 101 through the first circulation port 401 of the temperature control channel 403, flow through the internal space of the module housing 300, and perform heat exchange with the electric core inside the module housing 300, so that the electric core is heated or cooled, the heat exchange medium after heat exchange flows into the second space 102 again, and then flows back to the temperature control channel 403 through the second circulation port 402 of the temperature control channel 403, and the heat exchange medium is cooled or heated under the action of the heat exchange device, thereby completing one circulation.
As shown in fig. 5, fig. 5 is a schematic view illustrating another flow direction of a heat exchange medium of a battery energy storage system provided by an embodiment of the present application. When the heat exchange medium flows in the circulation channel in the reverse direction, the heat exchange medium may flow into the second space 102 through the second circulation port 402 of the temperature control channel 403, flow through the internal space of the module casing 300, and perform heat exchange with the electrical core inside the module casing 300, so as to heat or cool the electrical core, the heat exchange medium after heat exchange flows into the first space 101 again, and then flows back to the temperature control channel 403 through the first circulation port 401 of the temperature control channel 403, and the heat exchange medium is cooled or heated under the action of the heat exchange device, thereby completing one cycle.
With continued reference to fig. 6, fig. 6 shows another schematic structural diagram of the battery energy storage system provided by the embodiment of the present application. As shown in fig. 6, in some embodiments, the flow guide part 500 may be disposed in the temperature control channel 403, and the flow guide part 500 may guide the heat exchange medium to flow out of or into the temperature control channel 403 more directly. During specific implementation, the area near the first circulation port 401 inside the temperature control channel 403 may be provided with a turning plate 405, the turning plate 405 may form an included angle with the first circulation port 401, and the turning plate 405 may have a certain distance from the first circulation port 401 to form a turning space, which plays a role in adjusting the flow direction of the heat transfer medium, and ensures that the heat transfer medium can smoothly flow through the first circulation port 401. When the flow guide part 500 is disposed in the temperature control channel 403, the flow guide part 500 may be disposed in an included angle region between the turning plate 405 and the first circulation port 401.
With continued reference to fig. 7, fig. 7 shows another structural schematic diagram of the battery energy storage system provided in the embodiment of the present application. As shown in fig. 7, in some embodiments, the flow guiding part 500 may also be arranged in the flow guiding channel 600, and with this arrangement, the flow guiding part 500 may also guide the heat exchange medium to flow out of or into the first space 101 more directly.
It should be understood that, when the flow guide part 500 is disposed in one of the temperature control channel 403, the flow guide channel 600 or the module case 300, the flow guide part 500 may be a relatively strong type to effectively overcome the flow resistance, so that the heat exchange medium can reliably flow through the internal space of the module case 300, and thus can reliably exchange heat with the battery cell inside the module case 300. In addition, the number of the flow guide parts 500 may be plural, and the plural flow guide parts 500 may be arranged in parallel to enhance the flow guide effect, for example, when the flow guide part 500 adopts the above-mentioned reversible axial flow fan, the plural axial flow fans are arranged in parallel to form a fan wall.
In other embodiments, multiple ones of the circulation channel-constituting components may be provided with flow guides at the same time, for example:
referring to fig. 8, fig. 8 shows another schematic structural diagram of the battery energy storage system provided by the embodiment of the present application. In this embodiment, the number of the flow guiding parts 500 may be plural, wherein part of the flow guiding parts 500 may be disposed on the module case, and the other part of the flow guiding parts 500 may be disposed in the temperature control channel 403;
referring to fig. 9, fig. 9 shows another schematic structural diagram of the battery energy storage system provided by the embodiment of the present application. In this embodiment, the number of the flow guide parts 500 may be plural, wherein a part of the flow guide parts 500 may be disposed on the module case 300, and another part of the flow guide parts 500 may be disposed in the flow guide passage 600;
referring to fig. 10, fig. 10 shows another structural schematic diagram of the battery energy storage system provided in the embodiment of the present application. In this embodiment, the number of the flow guide parts 500 may be plural, wherein part of the flow guide parts 500 may be disposed in the temperature control passage 403, and another part of the flow guide parts 500 may be disposed in the flow guide passage 600;
referring to fig. 11, fig. 11 shows another schematic structural diagram of the battery energy storage system provided in the embodiment of the present application. In this embodiment, the number of the flow guide parts 500 may be plural, wherein a part of the flow guide parts 500 may be disposed on the module case 300, and another part of the flow guide parts 500 may be disposed in the temperature controlled passage 403 and the flow guide passage 600, respectively. When many places are provided with water conservancy diversion portion 500 in the circulation passage, can strengthen the guide effect to heat transfer medium, improve heat transfer medium's flow efficiency, can also make heat transfer medium's switching-over flow realize fast.
In addition, when the second opening of the module housing 300 is provided with the flow guiding portion 500, the first opening of the module housing 300 may also be provided with the flow guiding portion 500 at the same time, so as to guide the heat exchange medium to flow through the internal space of the module housing 300, thereby enhancing the heat exchange of the battery cell inside the module housing 300.
With continued reference to fig. 12, fig. 12 shows a schematic side view of the battery energy storage system provided by the embodiment of the present application. As shown in fig. 12, the number of the temperature control assemblies 400 may be multiple, so as to enhance the temperature control capability of the battery cells inside the battery module. In this embodiment, the plurality of temperature control modules 400 may share the first space, the internal space of the module case 300, and the second space constituting the circulation passage. In a specific implementation, the first vents 401 of the plurality of temperature control elements 400 may be connected in parallel to the first space, and the second vents 402 of the plurality of temperature control elements 400 may be connected in parallel to the second space. When the first communication port 401 communicates with the first space through the flow guide channel, the first communication ports 401 of the plurality of temperature control elements 400 may be connected in parallel to the flow guide channel.
With continued reference to fig. 13, fig. 13 shows another schematic structural diagram of the battery energy storage system provided by the embodiment of the present application. In some embodiments, as shown in fig. 13, the temperature-controlled channel 403 may be fixedly connected to the upper side of the casing 100, the first communication port 401 and the second communication port 402 may be respectively located at two sides of the spoiler 200, the first communication port 401 may directly communicate with the first space 101, and the second communication port 402 may directly communicate with the second space 102. In practical implementation, when the temperature control channel 403 is fixedly connected to the upper portion of the casing 100, the temperature control channel 403, together with the heat exchange device and other related components, may be designed as a top-loading air conditioner.
Fig. 13 shows a flow direction of the heat exchange medium, which can flow into the first space 101 from the first circulation port 401 of the temperature controlled channel 403, flow through the internal space of the module case 300, then flow into the second space 102, and flow back to the temperature controlled channel 403 from the second circulation port 402 of the temperature controlled channel 403. Fig. 14 shows another schematic flow direction of the heat exchange medium of the battery energy storage system provided by the embodiment of the application. As shown in fig. 13, the heat exchange medium can flow into the second space 102 through the second communication port 402 of the temperature control channel 403, flow through the internal space of the module case 300, flow into the first space 101, and flow back to the temperature control channel 403 through the first communication port 401 of the temperature control channel 403.
The following description is made with respect to the flow of the heat exchange medium in the internal space of the module case:
heat transfer medium flows into the internal space of the module shell and flows through the gap between the battery cores inside the battery module. In specific implementation, the heat exchange medium can directly flow through the surface of the battery cell and directly exchange heat with the battery cell. Or, the space between the electric cores is provided with a module channel, the module channel is abutted to the surface of the electric core, and a heat exchange medium flows through the module channel and exchanges heat with the electric core through the module channel.
Referring to fig. 15, fig. 15 shows an internal structural schematic diagram of a module housing in a battery energy storage system provided by an embodiment of the present application. In some embodiments, as shown in fig. 15, a first module passage 303 extending from a first end to a second end of the module housing 300 may be disposed inside the module housing 300, and a second module passage 304 may be disposed, wherein the second module passage 304 may be arranged in parallel with the first module passage 303. Wherein a first end of the first module channel 303 is communicated with the first space, and a second end of the first module channel 303 is closed; the first end of the second module passage 304 is closed and the second end of the second module passage 304 communicates with the second space. In addition, the first module passage 303 and the second module passage 304 may be communicated through the third module passage 305, the number of the third module passage 305 may be plural, both ends of each third module passage 305 are respectively connected to the first module passage 303 and the second module passage 304, when the heat exchange medium flows into the first module passage 303 from the first space, the heat exchange medium is divided in the first module passage 303, flows through the plural third module passages 305, is merged in the second module passage 304, and then flows into the second space, that is, the first space and the second space are communicated through the first module passage 303, the second module passage 304, and the third module passage 305. From this, first module passageway 303, second module passageway 304 and a plurality of third module passageway 305 form the inside heat transfer passageway network of module casing 300, and the heat transfer medium temperature that flows into every third module passageway 305 is close relatively, can reduce the difference in temperature between electric core 700, for example reduce the difference in temperature between electric core 700 that is close to the first end of module casing 300 and the electric core 700 that is close to the second end of module casing 300, realize samming between the electric core 700.
Fig. 15 shows a flowing direction of the heat exchange medium inside the module housing, and the heat exchange medium may flow into the internal space of the module housing 300 from the first end of the module housing 300, sequentially flow through the first module channel 303, the third module channel 305 and the second module channel 304, exchange heat with the battery cell 700, and then flow out from the second end of the module housing 300. Fig. 16 shows another schematic flow direction of the heat exchange medium of the battery energy storage system in the module housing according to the embodiment of the present application, the heat exchange medium may flow into the internal space of the module housing 300 from the second end of the module housing 300, sequentially flow through the second module channel 304, the third module channel 305, and the first module channel 303, exchange heat with the battery cell 700, and then flow out from the first end of the module housing 300.
The first module channel 303 of this embodiment may be arranged in a gap between the first side inner wall of the module case 300 and the battery cell 700, the second module channel 304 may be arranged in a gap between the first side opposite side inner wall of the module case 300 and the battery cell 700, and the third module channel 305 may be arranged in a gap between the battery cell 700 and the battery cell 700. In specific implementation, the first module channel 303 and the second module channel 304 may be mounted on the inner wall of the module housing 300 through mounting structural members such as pins, or may adopt a mounting manner of welding and bonding, a first end of the first module channel 303 may be in butt joint with the first opening 301, and a second end of the second module channel 304 may be in butt joint with the second opening 302. When module casing 300 inside electric core 700 piles up arranges into the multilayer, can correspond every layer and set up a set of foretell heat transfer passageway network to lead heat transfer medium to each layer electric core 700, realize heat transfer medium and all electric cores 700 carry out the heat transfer simultaneously, make and to reach similar heat transfer effect between the different layers electric core 700, reduce the difference in temperature between the different electric cores 700. It can be understood that the third module channels 305 of the multi-layer heat exchange channel network may share one first module channel 303 and one second module channel 304, and the heat exchange with the multi-layer battery core 700 is realized through the layered arrangement of the third module channels 305.
Referring to fig. 17, fig. 17 shows another schematic internal structural diagram of a module housing in a battery energy storage system provided by the embodiment of the present application. In other embodiments, as shown in fig. 17, a fourth module passage 306 extending from the first end to the second end of the module housing 300 may be disposed inside the module housing 300, and both ends of the fourth module passage 306 are respectively communicated with the first space and the second space. Heat transfer medium flows into fourth module passageway 306 by first space, with the inside electric core 700 of module casing 300 heat transfer, continue to flow into the second space by fourth module passageway 306, being provided with of fourth module passageway 306 does benefit to heat transfer medium's quick flow, can reduce near the first end of module casing 300 and near the heat transfer medium difference in temperature of near module casing 300 second end, thereby reduce the electric core 700 that is close to the first end of module casing 300 and the difference in temperature between the electric core 700 that is close to the second end of module casing 300. Fourth module passageway 306 can arrange the space between electric core 700 and electric core 700, and in addition, fourth module passageway 306 can be a plurality of to the inside heat transfer medium flow of battery module is got into to the increase at the same moment, promotes the heat transfer effect, reduces the difference in temperature between electric core 700. During specific implementation, the fourth module channel 306 may be welded, bonded or installed on the inner wall of the module housing 300 by using a rod-like installation structure, two ends of the fourth module channel 306 may be respectively butted with the first opening 301 and the second opening 302 of the module housing 300, so as to communicate with the first space and the second space, and the number of the fourth module channels 306 may be multiple, so that the heat exchange medium may flow through the channels at the same time. When the inside electric core 700 of module casing 300 piles up to arrange into the multilayer, fourth module passageway 306 has all been arranged to each layer electric core 700 to lead heat transfer medium to each layer electric core 700, realize heat transfer medium and carry out the heat transfer with each layer electric core 700 simultaneously, reduce the difference in temperature between different layers electric core 700.
The first module channel 303, the second module channel 304, the third module channel 305 and the fourth module channel 306 in the above solution can all adopt a pipe-shaped structure, and the shape and specification thereof can be specifically determined according to the installation position.
It should be noted that the heat exchange medium may be a liquid medium, such as water, engine oil, etc., and correspondingly, the diversion portion 500 may be a reversible axial-flow impeller, etc., and the heat exchange device may be a liquid cooling device and system, such as a plate heat exchanger, etc. In the embodiment, when the heat exchange medium is a non-insulating liquid, it is necessary to ensure that the heat exchange medium does not directly contact with the battery cell, so the module housing 300 needs to adopt the structural form of the first module channel 303, the second module channel 304, the third module channel 305 and the fourth module channel 306, and each module channel needs to adopt a closed pipeline, thereby isolating the heat exchange medium and the cells inside the module case 300, and, in addition, when the module case 300 adopts a non-closed structure having other openings in addition to the first opening 301 and the second opening 302, the temperature control channel is connected with the module channel through a closed pipeline, so that the heat exchange medium does not directly flow through the first space and the second space, thereby also keep apart heat transfer medium and electric core outside module casing 300, can understand, when module casing 300 adopted the enclosed construction, heat transfer medium then can directly flow through first space and second space.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (12)
1. A battery energy storage system, comprising:
the air conditioner comprises a shell, wherein a spoiler is arranged inside the shell and divides the inner space of the shell into a first space and a second space which are independent of each other;
the battery module comprises a module shell and a battery cell arranged in the module shell, two ends of the module shell are respectively provided with a first opening and a second opening, the module shell is arranged on the spoiler, the first opening is communicated with the first space, and the second opening is communicated with the second space;
the temperature control assembly is arranged on the shell, a temperature control channel and a heat exchange device are arranged in the temperature control assembly, the heat exchange device is positioned in the temperature control channel, a first circulation port and a second circulation port are respectively arranged at two ends of the temperature control channel, the first circulation port is communicated with the first space, the second circulation port is communicated with the second space, and the first space, the inner space of the module shell, the second space and the temperature control channel form a circulation channel;
the flow guide part is arranged in the circulating channel and used for guiding the heat exchange medium in the circulating channel to flow along a first direction or a second direction, and the first direction is opposite to the second direction.
2. The battery energy storage system of claim 1, wherein the flow guide is disposed within the temperature controlled passage.
3. The battery energy storage system of claim 1 or 2, wherein the flow guide is disposed at the first opening.
4. The battery energy storage system of any of claims 1-3, wherein the first vent and the second vent are located on a same side of the spoiler;
the battery energy storage system further comprises a flow guide channel, one end of the flow guide channel is communicated with the first circulation port, and the other end of the flow guide channel is communicated with the first space.
5. The battery energy storage system of claim 4, wherein the flow guide channel comprises at least one flow guide plate, at least one flow guide plate defines a channel-like structure, or/and more than one flow guide plate and the inner wall of the housing define a channel-like structure.
6. The battery energy storage system of claim 4 or 5, wherein the flow guide is disposed within the flow guide channel.
7. The battery energy storage system of any of claims 1-3, wherein the first vent and the second vent are located on opposite sides of the spoiler, respectively.
8. The battery energy storage system according to any one of claims 1 to 7, wherein the number of the battery modules is plural, and the plural battery modules are arranged at intervals.
9. The battery energy storage system of any of claims 1-8, wherein a first module channel, a second module channel, and a third module channel are disposed within the module housing;
one end of the first module channel is communicated with the first space, and the other end of the first module channel is closed;
one end of the second module channel is communicated with the second space, the other end of the second module channel is closed, and the second module channel and the first module channel are arranged in parallel;
the two ends of the third module channel are respectively communicated with the first module channel and the second module channel, and the third module channel is arranged between the adjacent electric cores.
10. The battery energy storage system of any one of claims 1-8, wherein a fourth module channel is disposed inside the module housing, two ends of the fourth module channel are respectively communicated with the first space and the second space, and the fourth module channel is disposed between adjacent battery cells.
11. The battery energy storage system of any one of claims 1-10, further comprising a control portion and a temperature detection device;
the temperature detection device is arranged in the module shell and used for detecting the temperature difference between the battery cores at two ends of the module shell;
the control part is arranged on the shell and connected with the temperature detection device and used for controlling the flow guide part to guide the heat exchange medium in the circulating channel to flow along a first direction or a second direction according to the temperature difference between the battery cores.
12. An electric vehicle, characterized by comprising the battery energy storage system according to any one of claims 1 to 11 and a power system, wherein the battery energy storage system is used for supplying power to the power system, and the power system is used for driving the electric vehicle to run.
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| CN202110199884.8A CN114976372A (en) | 2021-02-22 | 2021-02-22 | Battery energy storage system and electric automobile |
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| CN202110199884.8A CN114976372A (en) | 2021-02-22 | 2021-02-22 | Battery energy storage system and electric automobile |
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