CN107681226B - Temperature control component, temperature control pipeline and thermal management system of lithium battery pack - Google Patents
Temperature control component, temperature control pipeline and thermal management system of lithium battery pack Download PDFInfo
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- CN107681226B CN107681226B CN201710905466.XA CN201710905466A CN107681226B CN 107681226 B CN107681226 B CN 107681226B CN 201710905466 A CN201710905466 A CN 201710905466A CN 107681226 B CN107681226 B CN 107681226B
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 45
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 45
- 239000007788 liquid Substances 0.000 claims abstract description 83
- 238000010438 heat treatment Methods 0.000 claims abstract description 81
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 67
- 238000001816 cooling Methods 0.000 claims abstract description 65
- 239000000945 filler Substances 0.000 claims abstract description 10
- 238000004806 packaging method and process Methods 0.000 claims abstract description 9
- 239000003292 glue Substances 0.000 claims abstract description 5
- 229920001971 elastomer Polymers 0.000 claims description 26
- 239000000110 cooling liquid Substances 0.000 claims description 10
- 230000017525 heat dissipation Effects 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 239000000306 component Substances 0.000 description 12
- 238000010586 diagram Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 8
- 239000010410 layer Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- 238000005496 tempering Methods 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 230000010354 integration Effects 0.000 description 3
- 239000000178 monomer Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 241000270295 Serpentes Species 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000002355 dual-layer Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
Classifications
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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
- H01M10/613—Cooling or keeping cold
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/615—Heating or keeping warm
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—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
- H01M10/63—Control systems
-
- 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
-
- 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
- H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/657—Means for temperature control structurally associated with the cells by electric or electromagnetic means
- H01M10/6571—Resistive heaters
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- 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)
- Automation & Control Theory (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a temperature control part, a temperature control pipeline and a thermal management system of a lithium battery pack, wherein the temperature control part is a multi-layer pipeline, an inner water pipe, a heat conduction filler, a PTC heating plate, a glue filler and a packaging shell are sequentially arranged from inside to outside, and a PTC heating control plate is arranged between the PTC heating plate and the packaging shell. The thermal management system comprises at least more than two liquid cooling plates which are oppositely arranged, and each liquid cooling plate is provided with a water inlet and a water outlet respectively; the water inlet pipeline and the water outlet pipeline are communicated, are arranged at the connecting parts of the liquid cooling plates which are arranged oppositely in parallel, are connected with the water inlet and the water outlet on the liquid cooling plates, and are provided with temperature control components of the lithium battery pack. The invention can effectively control the temperature of the temperature in the lithium battery pack, realize the consistency of the temperatures of the battery cells at different positions in the lithium battery pack and prolong the service life of the lithium battery pack.
Description
Technical Field
The invention belongs to the technical field of power lithium batteries for new energy electric vehicles, and more particularly to lithium battery pack temperature control components, temperature control conduits, and thermal management systems.
Background
The increasing production of automobiles has led to the need for ever more serious problems of air pollution and energy consumption on earth. How to reduce the damage of automobile exhaust emission and the like to the environment, the automobile industry in the world focuses on the direction of new energy electric automobiles, and corresponding research institutions and enterprise research centers are established in a dispute. In the direction of new energy electric automobiles, the power lithium battery is compliant to be one of the core components of the first research.
In the use process of the electric automobile loaded with the power lithium battery system, because of the conditions of frequent heavy current discharge in running, instant energy recovery due to emergency braking, heavy current charging adopted due to repeated use and the like, the temperature of the battery core of the battery can be continuously increased in the working conditions to generate temperature difference, unsafe conditions exist, the service life of the battery is further influenced and the like. In order to reduce the risks, at present, research institutions at home and abroad commonly adopt an air cooling and liquid cooling system as a cooling mode to control the temperature of an electric core in a power lithium battery system.
In the current air cooling mode, the heating function at low temperature cannot be solved, so that the normal use of the lithium battery system in a cold environment below-20 ℃ cannot be ensured; and the air cooling mode cannot ensure good consistency of temperature differences of the battery cores at different positions in the battery pack of the same box.
In the current liquid cooling mode, the heating function at low temperature can be solved, but because the heating liquid passes through different pipelines or because of the temperature difference brought by series connection, the difference of the temperature difference of the battery cores at different positions in the battery pack of the same box exceeding 8 ℃ is also brought, and along with the accumulation of the use process, the difference is also gradually increased.
Disclosure of Invention
The first objective of the present invention is to provide a temperature control component for a lithium battery pack, so as to solve the technical problem that the temperature in the lithium battery pack cannot be effectively controlled.
The second objective of the present invention is to provide a temperature control pipe to solve the technical problem of inconsistent temperatures of battery cells at different positions in a lithium battery pack.
A third objective of the present invention is to provide a thermal management system, so as to solve the technical problem that the service life of a lithium battery pack is short due to use in a cold environment.
The technical scheme adopted by the invention is as follows.
A temperature control component of a lithium battery pack is a multilayer pipeline, an internal water pipe, a heat conducting filler, a PTC heating plate, a glue filler and a packaging shell are sequentially arranged from inside to outside, and a PTC heating control plate is arranged between the PTC heating plate and the packaging shell.
In a further specific embodiment, the PTC heating plate comprises a plurality of heating plates forming polygonal pipes for wrapping the inner water pipe, each heating plate is located at a corresponding tangential position of the pipe, and the PTC heating control plate is attached to one of the heating plates.
The heating plate of the invention not only enlarges the heating area but also does not enlarge the whole volume;
in a still further embodiment of the present invention, the PTC heating control board is controlled by the BMS battery management system.
The invention provides a temperature control pipeline of a lithium battery pack, which is characterized in that an inner water pipe is provided with a straight pipe and an outer spiral surrounding spiral pipe, the joint of the two sections of temperature control pipelines is connected by adopting a rubber connecting pipe, the spiral pipe and the straight pipe of the two sections of temperature control pipelines are switched inside the rubber connecting pipe, one section of straight pipe is connected with the other section of spiral pipe, and one section of spiral pipe is connected with the other section of straight pipe. To solve the switching function of the straight pipe and the spiral pipe.
In a further specific embodiment, the rubber connecting pipe is connected and comprises a rubber pipe clamp and a sealing rubber pipe. The rubber pipe clamp is used for fixing two sections of pipelines, and internal switching of the spiral pipe and the straight pipe is realized.
The invention provides a thermal management system of a lithium battery pack, which comprises at least more than two liquid cooling plates which are oppositely arranged, wherein each liquid cooling plate is provided with a water inlet and a water outlet respectively; the water inlet pipeline and the water outlet pipeline are communicated, are arranged at the connecting parts of the liquid cooling plates which are arranged oppositely in parallel, are connected with the water inlet and the water outlet on the liquid cooling plates, and are provided with temperature control components of the lithium battery pack.
In a further specific embodiment, the lithium battery pack temperature control component is arranged on a water inlet pipeline, and temperature control pipelines are used on the water inlet pipeline and the water outlet pipeline.
In a further specific embodiment, the liquid cooling plates are double-layer liquid cooling plates, and are relatively fixed through fixing plates.
In a further specific embodiment, the double-layer cooling plate is communicated through a Y-shaped pipe, two ports of the Y-shaped pipe are connected with a water inlet or a water outlet of the liquid cooling plate, and the other port is correspondingly connected with a water inlet pipeline or a water outlet pipeline.
In a further specific embodiment, the water inlet pipeline and the water outlet pipeline are fixedly connected through a water inlet and outlet connector.
The invention has the technical effects.
(1) The lithium battery pack temperature control component can effectively control the temperature of the internal temperature of the lithium battery pack and prolong the service life. The temperature adjusting device is suitable for adjusting the temperature of the temperature adjusting liquid injected into different cold plates by the liquid injection pipeline, and avoids the temperature difference of the temperature adjusting liquid injected into different cold plates due to heat loss in the circulation process of the temperature adjusting liquid which is output from the liquid storage tank and heated by the heater along the liquid injection pipeline.
(2) The temperature control pipeline can realize good consistency of the temperatures of the battery units at different positions in the lithium battery pack.
(3) The thermal management system can prolong the service life of the lithium battery pack. When the temperature of the battery unit is too high, cooling effect on the battery unit is achieved through injecting cooling liquid, and overheat use of the battery unit is avoided. But also can realize the heating effect to the battery unit when the temperature of the battery unit is too high, avoid the supercooling use of the battery unit and play a role in preheating. The lithium battery pack is used in a better state due to the dual effects of temperature reduction and temperature rise.
Drawings
Fig. 1 is a structural view of a heating control member of the present invention.
Fig. 2 is a schematic diagram of a connection structure of a temperature control pipe according to the present invention.
Fig. 3 is a schematic diagram of the internal structure of the temperature control pipe connection of the present invention.
FIG. 4 shows a temperature control pipeline according to the present invention internal spiral pipes and straight pipes schematic diagrams.
FIG. 5 is a schematic diagram of a thermal management system according to the present invention.
FIG. 6 is a schematic diagram of another thermal management system of the present invention.
Fig. 7 is a schematic diagram of a dual-layer liquid cooling structure according to the present invention.
Fig. 8 is a schematic diagram of a stacked combination of multiple battery packs according to the present invention.
Fig. 9 is a logic structure diagram of a thermal management system of a lithium battery pack of the present invention.
Reference numerals illustrate: the solar cell comprises a liquid cooling plate 1, a water inlet pipeline 2, a water inlet and outlet connector 3, a PTC heating system 4, a rubber pipe clamp 5, a sealing rubber pipe 6, a Y-shaped pipe 7, a battery module 8, a water inlet 9, a rubber connecting pipe 11, a PTC heating control plate 12, a heat conducting filler 13, an inner water pipe 14, a PTC heating plate 15, a glue filler 16, a packaging shell 17 and a water outlet pipeline 18.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention.
Example 1
As shown in fig. 1, the temperature control component of the lithium battery pack provided by the invention is a multi-layer pipeline, an internal water pipe 14, a heat conducting filler 13, a PTC heating plate 15, a glue filler 16, a packaging shell 17 are sequentially arranged from inside to outside, and a PTC heating control plate 12 is arranged between the PTC heating plate 15 and the packaging shell 17. The temperature control component of the lithium battery pack has the advantages of constant temperature heating, energy conservation, good safety performance and long service life.
The PTC heating plate 15 is formed by a plurality of heating plates to wrap the inner water pipe 14 of the polygonal pipeline, each heating plate is positioned at the corresponding tangential position of the pipeline, and the PTC heating control plate 12 is attached to one of the heating plates. In this embodiment, a hexagonal heating pipe is used, so that the heating area is enlarged and the whole volume is not enlarged. As shown in fig. 9, the PTC heating control board 12 in the present embodiment is controlled by the BMS battery management system. The BMS is used for collecting the temperature of each battery cell 8 in the battery pack module in real time and is adapted to be connected with an on-board control assembly. The BMS is preset with a battery thermal management strategy, can make judgment of the current temperature condition according to the preset battery thermal management strategy according to temperature data acquired in real time, and sends corresponding signals to the vehicle-mounted control assembly.
Examples
As shown in fig. 2-4, the present invention provides a temperature control pipe for a lithium battery pack, using the temperature control component, wherein an inner water pipe 14 is provided with a straight pipe and an outer spiral surrounding spiral pipe, the connection of the two sections of temperature control pipes is connected by a rubber connecting pipe 11, the spiral pipe and the straight pipe of the two sections of temperature control pipes are switched inside the rubber connecting pipe, one section of straight pipe is connected with the other section of spiral pipe, and one section of spiral pipe is connected with the other section of straight pipe. The rubber connecting pipe is connected and comprises a rubber pipe clamp 5 and a sealing rubber pipe 6. Wherein the rubber pipe clamp 5 is used for fixing two sections of pipes and realizing the internal switching of the spiral pipe and the straight pipe.
When radiating, the cooling liquid enters from the straight pipe of the left pipeline and reaches the right pipeline spiral pipe through the spiral pipeline rubber connecting pipe. The structure is characterized in that: when the heat is dissipated, the liquid flows between the pipelines to dissipate the heat further, and the cooling liquid can dissipate the heat better due to the characteristics of the spiral pipeline, so that the cooling capacity is better ensured when the liquid enters the liquid cooling plate of the next battery module, and the cooling performance of the system is greatly improved.
During heating, the cooling liquid enters from the spiral pipe of the left pipeline and reaches the right pipeline straight pipe through the spiral pipe rubber connecting pipe. The structure is characterized in that: when the liquid passes through the PTC heating system, the liquid is positioned in the spiral pipeline, so that the heating surface is larger, the heating time is longer, and a better heating effect is achieved; and when passing through the transmission pipeline between the cooling plates, the system is influenced by the characteristics of straight pipe transmission, the transmission speed is higher, the heat loss of the liquid is smaller, and the heating performance of the system is greatly improved.
The invention fuses the two good heat treatment strategies, so that the system gives consideration to various conditions, provides a better treatment scheme for body integration and achieves the expected aim, and greatly improves the feasibility of the system.
The cooling liquid conveying pipe is a multi-layer pipeline structure consisting of spiral pipes, straight pipes and outer-covered pipelines. The spiral pipe is used for system heat dissipation, and during heat dissipation, the control system firstly injects cooling liquid into the straight pipe, and because the straight pipe is adopted, the cooling liquid can quickly reach the rear spiral pipe (improve the transmission speed), and meanwhile, the cooling liquid is injected into the wrapping pipe, so that the system is quickly cooled in a working mode similar to a snake-shaped cold pipe. According to the characteristics of the snake cooling pipe, the heat dissipation capacity of the system can be greatly enhanced, and the temperature of each battery pack in the system can be rapidly reduced, so that the requirement of rapid cooling is met. The straight pipe is used for system heating, and heating liquid is injected into the spiral pipe by the control system firstly during heating, and due to the spiral pipe, the heating area of the glass pipe can be fully increased when the PTC heating system is used, so that the heating liquid is rapidly heated, then the heating liquid reaches the rear conveying straight pipe through the connecting rubber pipe, and the heated liquid is rapidly conveyed to the periphery of the heating bag through the straight pipe, so that the system is heated. The heating system can improve the heating efficiency of the system during heating, and meets the design requirements of energy conservation and high efficiency; when in conveying, the liquid is quickly transferred into the straight pipe for quick conveying, thereby greatly reducing the heat loss of the heating liquid in the conveying process and achieving the design goal of fully utilizing energy.
The whole heating (radiating) system is integrated, so that the space utilization can be effectively reduced, and the design goal of high integration is achieved. In addition, the heating system is formed by combining a plurality of sections of heating pipelines, and a plurality of rubber hoses are connected between the heating pipelines, so that the heating system can adapt to the arrangement modes of battery packs with different forms, and is more convenient to detach, replace and reorganize.
The set of heating (radiating) system is adaptable to the system, and the spiral tube is designed for achieving better radiating or heating effects, is relatively slim, and has certain requirements on the working environment. The flow, flow speed and performance effect required by the integrated system are the best environment for the operation of the heating (radiating) system, so that the system can fully exert the performance advantages under the environment of the system, if the system is placed in other large heating systems, the slender pipeline is not guaranteed to reach the best performance requirement, and if the pipeline is forcibly enlarged, the effect is not superior to that of the conventional heating (radiating) system.
Example 3
The heat management system of the lithium battery pack provided by the invention as shown in fig. 5 comprises at least more than two liquid cooling plates 1 which are oppositely arranged, wherein a water inlet 9 and a water outlet are respectively arranged on each liquid cooling plate 1, the liquid cooling plates 1 are aluminum plates, grooves are formed in the aluminum plates, copper pipes suitable for injecting temperature regulating liquid are embedded in the grooves, and the aluminum and the copper have high heat conductivity.
The water inlet pipeline 2 and the water outlet pipeline 18 are communicated, are arranged at the connecting parts of the liquid cooling plates 1 which are arranged oppositely in parallel, are connected with the water inlet 9 and the water outlet on the liquid cooling plates, and are provided with temperature control components of the lithium battery pack. In order to realize insulation between the liquid cooling plate 1 and the battery module 8, a heat conducting insulation plate is arranged between the liquid cooling plate 1 and the battery module 8. The heat conducting insulating board is made of heat conducting silicon rubber.
Example 4
Further, on the basis of embodiment 3, as shown in fig. 6, the lithium battery pack temperature control part is provided on the water inlet pipe 2, and the temperature control pipes of embodiment 2 are used on the water inlet pipe 2 and the water outlet pipe 18.
As shown in fig. 7, the liquid cooling plate 1 is a double-layer liquid cooling plate, and is relatively fixed by a fixing plate.
As shown in fig. 6-7, the double-layer cooling plate is communicated through a Y-shaped pipe 7, two ports of the Y-shaped pipe 7 are connected with a water inlet or a water outlet of the liquid cooling plate 1, and the other port is correspondingly connected with a water inlet pipeline 2 or a water outlet pipeline 18.
As shown in fig. 6, the water inlet pipeline 2 and the water outlet pipeline 18 are fixedly connected through the water inlet and outlet connector 3.
In order to enable the integrated system to be more highly integrated and suitable for a narrower environment, as shown in fig. 8, the battery packs are placed in a cooling box in a group of three, and the cooling pipes and the cooling plates are covered after the battery packs are laid, so that a battery module is formed. Then fix every two battery modules back to back, form a group battery, according to the specific demand, we can lay the group battery as much as possible, can not be limited by the constraint of surrounding environment (extremely high system flexibility) like conventional system, connect with pipeline between the group battery, because pipeline is also for this structure is custom-made, can adapt to the group battery distribution condition of various forms, so can really improve the system flexibility, can not have such condition of pseudo-flexible system.
The integration mode selection of the invention is regarded as the special design of the system, and aims at small, medium and small or narrow spaces. The volume of the integrated battery pack is compressed, so that the battery pack can be arranged more flexibly, and the battery pack is provided with a special pipeline with extremely high flexibility, and the battery pack has the performances of high flexibility, high adaptability, low energy consumption, high efficiency, high resource utilization rate and the like which are not possessed by other heating systems.
The thermal management system of the lithium battery pack works as follows:
the BMS battery management system preset with the battery thermal management strategy collects the temperature of each battery module 8 in real time, and makes a judgment of the current temperature condition according to the preset battery thermal management strategy after collecting the temperature data in real time.
When the temperature data who gathers is higher than BMS battery management system and sets for the value according to the thermal management tactics, BMS battery management system sends cooling signal to on-vehicle control module, after on-vehicle control module received the cooling signal that BMS battery management system sent, control the suction pump of opening temperature regulating module, the temperature regulating liquid lets in annotates liquid pipeline 5 after import and export the connector, reach every liquid cooling board 1 again, utilize the heat exchange of liquid cooling board 1 and battery module 8, and the flow of the interior temperature regulating liquid of liquid cooling board 1, can take away battery monomer 1's heat and with battery monomer 1's heat conduction to liquid cooling board 1 on, with take away battery monomer 1's heat, thereby guarantee the timely transfer of whole battery module's heat and guarantee that whole battery module is in preferred operating temperature.
When the collected temperature data is higher than a value set by the BMS battery management system according to a thermal management strategy, for example, the early ambient temperature of a new energy electric vehicle used in a cold region in winter may be lower than minus 20 degrees, or the temperature of the new energy electric vehicle may be lower than minus 20 degrees when the new energy electric vehicle just starts to charge. At this moment, when the temperature data that BMS battery management system gathered in real time can be less than BMS battery management system and set for the value according to the thermal management tactics, BMS battery management system can send heating signal to on-vehicle control module, on-vehicle control module receives the heating signal that BMS battery management system sent back, on-vehicle control module control opens the heater work that the liquid reserve tank corresponds the configuration, in order to heat the tempering liquid, when the temperature of the tempering liquid of liquid reserve tank reaches required temperature, open the suction pump, the tempering liquid lets in the liquid filling pipeline after import and export the connector, reach every liquid cooling board 1 again, utilize the heat exchange of liquid cooling board 1 and battery module, and the flow of tempering liquid in the liquid cooling board 1 heats battery module 8, thereby guarantee that the temperature of whole group battery module risees and guarantee that whole group battery module is in preferred operating temperature.
In the process, heat loss exists, after the temperature-adjusting liquid after heat loss is injected into different liquid cooling plates 1, the temperature-increasing effect of the different liquid cooling plates 1 on corresponding battery modules 8 is inconsistent, so after a suction pump is started, a vehicle-mounted control assembly can intelligently control the PTC heaters arranged on the liquid injection pipelines corresponding to the liquid cooling plates 1 of different blocks to start heating, the temperature of the temperature-adjusting liquid injected into the liquid cooling plates 1 of different blocks by the liquid injection pipelines is adjusted, and the consistency of the temperature adjustment of the battery modules 8 at different positions in the lithium battery pack is improved.
Specifically, in the control process of the PTC heater controlled by the vehicle-mounted control assembly, when the difference Δv between the average temperature of the whole unit of the battery module 8 collected by the BMS battery management system and the average temperature of the battery cells of the whole battery module reaches 3 ℃ or more, the vehicle-mounted control assembly controls the PTC heater of the liquid cooling plate 1 corresponding to the battery module 8 of the present invention to be started for heating; when the difference Δv between the average temperature of the whole unit of the battery module 8 collected by the BMS battery management system and the average temperature of the battery cells of the whole battery module is less than or equal to 1 ℃, the vehicle-mounted control assembly controls the PTC heater of the liquid cooling plate 1 corresponding to the battery module 8 of the present invention to stop heating. Specific references are shown in the following table:
| sequence number | PTC heater | Judgment condition |
| 1 | Opening the valve | ΔV≥3 °C |
| 2 | Closing | ΔV≤1 °C |
Δv=v1-V2 in the above table;
v1 is the average temperature after the accumulated total value of the temperatures of the battery cells of the battery pack module is divided by the total number of temperature points;
v2 is the average temperature of the sum of the temperatures of the cells of the battery module 8 that need to be heated divided by the total number of temperature points in the unit.
The above examples are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above examples, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principle of the present invention should be made in the equivalent manner, and the embodiments are included in the protection scope of the present invention.
In the description of the present invention, it should be understood that the terms "orientation" or "positional relationship" are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and to simplify the description, rather than to indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, may be a communication between two elements or an interaction between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal," "vertical," "overhang," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the present invention, unless expressly stated or limited otherwise, a first feature may include first and second features directly contacting each other, either above or below a second feature, or through additional features contacting each other, rather than directly contacting each other. Moreover, the first feature being above, over, and on the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being below, beneath, and beneath the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is less level than the second feature.
Claims (7)
1. The temperature control pipeline of the lithium battery pack is characterized in that a temperature control component is used, the temperature control component is a multi-layer pipeline, an inner water pipe (14), a heat conduction filler (13), a PTC heating plate (15), a glue filler (16) and a packaging shell (17) are sequentially arranged from inside to outside, and a PTC heating control plate (12) is arranged between the PTC heating plate (15) and the packaging shell (17);
the PTC heating plates (15) are formed by a plurality of heating plates, polygonal pipelines wrap internal water pipes (14), each heating plate is positioned at a corresponding tangential position of the pipeline, and the PTC heating control plates (12) are attached to one heating plate;
the PTC heating control panel (12) is controlled by a BMS battery management system;
the inner water pipe (14) is provided with a straight pipe and an external spiral surrounding spiral pipe, the joint of the two sections of temperature control pipelines is connected by adopting a rubber connecting pipe (11), the spiral pipe and the straight pipe of the two sections of temperature control pipelines are switched inside the rubber connecting pipe, one section of the straight pipe is connected with the other section of the spiral pipe, and one section of the spiral pipe is connected with the other section of the straight pipe;
during heat dissipation, the control system firstly injects cooling liquid into the straight pipe, and the cooling liquid rapidly reaches the rear spiral pipe; during heating, the control system firstly injects heating liquid into the spiral pipe, and then the heating liquid reaches the rear conveying straight pipe through the connecting rubber pipe.
2. The temperature control pipeline of the lithium battery pack according to claim 1, wherein the rubber connecting pipe is connected, the rubber connecting pipe comprises a rubber pipe clamp (5) and a sealing rubber pipe (6).
3. A thermal management system for a lithium battery pack, comprising: at least more than two liquid cooling plates (1) which are oppositely arranged, wherein a water inlet (9) and a water outlet are respectively arranged on each liquid cooling plate (1); the water inlet pipeline (2) is communicated with the water outlet pipeline (18), is arranged at the connecting part of the liquid cooling plates (1) which are arranged oppositely in parallel, is connected with the water inlet (9) and the water outlet (10) on the liquid cooling plates, and is provided with the temperature control pipeline of the lithium battery pack according to claim 1.
4. The thermal management system of a lithium battery pack of claim 3, wherein: the lithium battery pack temperature control pipeline is arranged on the water inlet pipeline (2).
5. The thermal management system of a lithium battery pack of claim 3, wherein: the liquid cooling plate (1) is a double-layer liquid cooling plate, and the liquid cooling plates are relatively fixed through a fixing plate.
6. The thermal management system of a lithium battery pack of claim 5, wherein: the double-layer liquid cooling plate is communicated through a Y-shaped pipe (7), two ports of the Y-shaped pipe (7) are connected with a water inlet or a water outlet of the liquid cooling plate (1), and the other port is correspondingly connected with a water inlet pipeline (2) or a water outlet pipeline (18).
7. The thermal management system of a lithium battery pack of claim 3, wherein: the water inlet pipeline (2) and the water outlet pipeline (18) are fixedly connected through the water inlet and outlet connector (3).
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| CN201710905466.XA CN107681226B (en) | 2017-09-29 | 2017-09-29 | Temperature control component, temperature control pipeline and thermal management system of lithium battery pack |
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| CN201710905466.XA CN107681226B (en) | 2017-09-29 | 2017-09-29 | Temperature control component, temperature control pipeline and thermal management system of lithium battery pack |
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| CN112582728A (en) * | 2020-12-03 | 2021-03-30 | 章春元 | Wind-liquid integrated thermal management battery system of electric motorcycle |
| CN114360187A (en) * | 2022-03-21 | 2022-04-15 | 湖北晟盾建设工程有限公司 | Fire alarm convenient to installation |
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