CN208674326U - Electric automobile power battery temperature management system - Google Patents
Electric automobile power battery temperature management system Download PDFInfo
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- CN208674326U CN208674326U CN201821754698.6U CN201821754698U CN208674326U CN 208674326 U CN208674326 U CN 208674326U CN 201821754698 U CN201821754698 U CN 201821754698U CN 208674326 U CN208674326 U CN 208674326U
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- 238000009423 ventilation Methods 0.000 claims abstract description 19
- 238000005192 partition Methods 0.000 claims abstract description 5
- 230000001105 regulatory effect Effects 0.000 claims description 13
- 238000003825 pressing Methods 0.000 claims description 8
- 239000011159 matrix material Substances 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 4
- 238000001816 cooling Methods 0.000 abstract description 16
- 238000004378 air conditioning Methods 0.000 abstract description 4
- 235000019628 coolness Nutrition 0.000 abstract 1
- 239000003570 air Substances 0.000 description 97
- 238000007726 management method Methods 0.000 description 60
- 238000000034 method Methods 0.000 description 10
- 239000000178 monomer Substances 0.000 description 9
- 239000012080 ambient air Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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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
- 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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Abstract
The utility model provides a kind of electric automobile power battery temperature management system, including motor compressor, compressor controller, high-voltage relay, power battery, battery management control modules, 12V power supply, the first ventilation shaft, the second ventilation shaft and Battery case；Wherein, the inside of Battery case is separated into different sections by partition, is separately installed with battery in each section, temperature sensor is provided with around battery；Second ventilation shaft is separately mounted in each section, second ventilation shaft is connected to the first ventilation shaft, first ventilation shaft is connected to the air outlet of motor compressor, the air inlet of motor compressor is connected to by air-conditioning duct with air conditioning for automobiles, it is equipped in air-conditioning duct by the solenoid valve of solenoid valve controller control opening and closing, temperature-sensing wax type volume damper is installed in the second ventilation shaft.The consistency of battery temperature after the utility model is cooled down using the synchronism and holding for realizing different battery pack coolings.
Description
Technical Field
The utility model relates to an electric automobile power battery thermal management technical field, more specifically relates to an electric automobile power battery temperature management system.
Background
The consistency of the power batteries of the electric automobile is a main factor for ensuring the discharge performance and the service life of the batteries, and has obvious influence on the power performance and the economical efficiency of the electric automobile. Although the power battery leaves the factory and is screened in strict consistency, in the actual use process of loading, frequent heavy current discharge operation exists for a long time due to driving requirements, the temperature rise of individual batteries is obvious, temperature imbalance exists among battery monomers, and the discharge performance, safety and service life are difficult to guarantee.
At present, the power battery thermal management methods for the electric automobile are researched more, and thermal management schemes are different, but the purpose of the thermal management methods is to establish a cooling system in a battery box, take away heat released by the battery through the work of the cooling system, reduce the temperature of the battery, ensure that the battery is maintained in a normal working temperature range, improve the consistency and ensure the discharge performance, the service life and the safety.
More public data show that the temperature of battery monomers is different, the difference between the discharge capacity, the cycle life and the safety of the battery monomers is larger, and the larger the temperature difference of the battery monomers is, the larger the performance difference of the battery monomers is, so that the temperature consistency of the battery monomers in the working process of the battery pack of the electric automobile is a main factor for ensuring the discharge capacity, the safety and other similar performances of the battery monomers, and therefore, the aim of thermal management development of the power battery of the electric automobile is to realize the temperature reduction of the battery, more importantly, the control of the temperature consistency of the battery monomers is realized, including the temperature consistency of the battery monomers after thermal management and the synchronization of the.
Although the existing power battery thermal management method can effectively solve the problem of temperature rise in the battery discharging process, the existing battery thermal management system mainly has two management methods by neglecting whether the cooling system can realize the temperature consistency or uniformity of all single batteries:
the first method is a centralized cooling method, when the battery management control module detects that part of the battery temperature rises to the upper safety threshold (for example, 50 ℃), the cooling system is turned on, cold air directly enters the whole battery box, and the temperature in the battery box is reduced to below the lower safety threshold (for example, 35 ℃), and the method has the disadvantage that the consistency of the battery temperature rise is not considered, for example: in the temperature rise process, some of the battery cells reach 50 ℃ and some of the battery cells only reach 30 ℃, after the heat management, although the temperature of all the battery cells can be reduced to a normal working range (below 35 ℃), due to the difference of the temperature rise of the battery cells, the temperature range span between the battery cells after the heat management is very large, for example, the temperature of some of the battery cells is reduced to 20 ℃, and the temperature consistency of the battery cells after the heat management is not realized.
The second method is to perform grouping thermal management on the batteries in the battery box, and control the cooling of each group of batteries through an electromagnetic valve, so that the battery pack with high temperature is cooled, and the battery pack with low temperature is not cooled. Although the method can solve the problem of the consistency of the battery temperature after thermal management, the synchronism of temperature reduction in the thermal management process is ignored, for example, the temperature of the battery pack I and the battery pack II reaches 50 ℃ at the same time, but the temperature rise of the battery pack II is fast, because the electromagnetic valve only controls whether each branch is thermally managed or not, the cooling air volume adjusting capacity is not available, and the cooling capacities of the branch I and the branch II are the same, the temperature reduction of the branch I is fast obviously, the temperature reduction of the branch II is slow, and the asynchronization of temperature reduction occurs in the temperature reduction process of the.
SUMMERY OF THE UTILITY MODEL
In view of the above problem, the utility model aims at providing an electric automobile power battery temperature management system to solve the problem that the uniformity of battery temperature and the synchronism that can't guarantee the temperature reduction after current power battery thermal management method can't realize the thermal management.
The utility model provides an electric automobile power battery temperature management system, include: the system comprises an electric compressor, a compressor controller, a high-voltage relay, a power battery, a battery management control module, a 12V power supply, a first ventilating duct, a second ventilating duct and a battery box body; the battery box body is internally divided into different sections through partitions, the two ends of each section are respectively provided with an air inlet and an air outlet, batteries which are arranged in a matrix manner are respectively arranged in each section, and a temperature sensor is arranged between two adjacent columns of batteries; the second ventilation pipelines are respectively arranged in each section of the battery box body, each second ventilation pipeline respectively comprises a second main pipeline and a second branch pipeline communicated with the second main pipeline, the outlet of each second branch pipeline is positioned at the front end of the first row of batteries, the second main pipeline penetrates through the air inlet and extends out of the battery box body, and a temperature-sensing wax type air volume regulating valve is arranged in each second main pipeline; the first ventilation pipeline comprises a first main pipeline and a first branch pipeline communicated with the first main pipeline, the first branch pipeline is communicated with a second main pipeline, the first main pipeline is communicated with an air outlet of the electric compressor, an air inlet of the electric compressor is communicated with an automobile air conditioner through an air conditioner pipeline, and an electromagnetic valve controlled to be opened and closed by an electromagnetic valve controller is installed in the air conditioner pipeline; the battery management control module comprises n sensor pins, an electromagnetic valve controller pin, two compressor controller pins, a high-voltage relay pin and two power supply pins, wherein n is the number of the temperature sensors, the n sensor pins are respectively connected with one temperature sensor, and the two power supply pins are respectively connected with the positive electrode and the negative electrode of a 12V power supply; the electromagnetic valve controller comprises five pins, wherein a first pin is connected with a pin of the electromagnetic valve controller, a second pin is connected with the positive electrode of the 12V power supply, a third pin is connected with the negative electrode of the 12V power supply, and a fourth pin and a fifth pin are connected with the electromagnetic valve; the compressor controller comprises nine pins, a first pin is connected with the anode of a 12V power supply after being connected with an automobile air conditioner switch in series, the first pin is connected with the cathode of the 12V power supply, a third pin and a sixth pin are connected with two compressor controller pins, a fifth pin is connected with the cathode of a power battery, and seventh to ninth pins are respectively connected with the electric compressor; the high-voltage relay comprises two coil pins and two relay pins, wherein one coil pin is connected with the negative electrode of the 12V power supply, and the other coil pin is connected with the high-voltage relay pin; one of the relay pins is connected with a fourth pin of the compressor controller, and the relay pin is connected with the positive electrode of the power battery.
Further, it is preferable that the temperature sensitive wax type air volume adjusting valve includes: the upper valve body, the lower valve body, the push rod, the valve clack and the temperature sensing bulb; the temperature sensing bulb is sealed at the bottom of the lower valve body through a sealing cover, and temperature sensing wax is sealed in the temperature sensing bulb; the upper valve body is buckled on the lower valve body, the interior of the upper valve body is divided into two cavities through the inner wall according to the air inlet direction, an opening is formed in the inner wall, the valve clack is sleeved at the top end of the push rod, the bottom end of the push rod downwards penetrates through the opening to be inserted into the temperature sensing wax, and the valve clack at the top end of the push rod opens or closes the opening; the middle position of push rod is protruded with a circle of boss, the push rod is sleeved with a pre-pressing spring, and the pre-pressing spring is limited between the boss and the lower valve body.
Compared with the prior art, the utility model provides an electric automobile power battery temperature management system is through the intake of the dual independent control each branch cold wind of each branch temperature sensing wax formula air regulation valve of each branch and temperature sensor to realize the synchronism of different group battery cooling and keep the uniformity of cooling back battery temperature.
To the accomplishment of the foregoing and related ends, one or more aspects of the invention comprise the features hereinafter fully described. The following description and the annexed drawings set forth in detail certain illustrative aspects of the invention. These aspects are indicative, however, of but a few of the various ways in which the principles of the invention may be employed. Moreover, the present invention is intended to include all such aspects and their equivalents.
Drawings
Other objects and results of the invention will be more apparent and readily appreciated by reference to the following description taken in conjunction with the accompanying drawings, and as the invention is more fully understood. In the drawings:
fig. 1 is a schematic structural diagram of a temperature management system for a power battery of an electric vehicle according to an embodiment of the present invention;
fig. 2 is an electrical schematic diagram of an electric vehicle power battery temperature management system according to an embodiment of the present invention;
fig. 3 is a schematic structural view of a temperature-sensitive wax type air volume adjusting valve according to an embodiment of the present invention.
Wherein the reference numerals include: the air conditioner comprises an electric compressor A, a compressor controller B, a high-voltage relay C, an automobile air conditioner switch D, a power battery E, a battery management control module F, a 12V power supply G, an electromagnetic valve controller H, a first ventilation pipeline 1, a second ventilation pipeline 2, a battery box body 3, a partition 31, an air inlet 32, an air outlet 33, a battery 4, a temperature sensor 5, an air conditioning pipeline 6, a temperature-sensitive wax type air volume adjusting valve 7, an upper valve body 71, a lower valve body 72, a push rod 73, a boss 731, a valve clack 74, a temperature-sensitive bag 75, temperature-sensitive wax 76, a pre-pressing spring 77, a sealing cover 78 and an electromagnetic valve 8.
Detailed Description
For better illustration of the technical solution of the present invention, the following detailed description is made with reference to the accompanying drawings.
Fig. 1 and fig. 2 show the structure and the electric principle of an electric vehicle power battery temperature management system according to an embodiment of the present invention.
As shown in fig. 1 and fig. 2 together, the utility model provides an electric automobile power battery temperature management system, include: the system comprises an electric compressor A, a compressor controller B, a high-voltage relay C, an automobile air conditioner switch D, a power battery E, a battery management control module F, a 12V power supply G, a first ventilation pipeline 1, a second ventilation pipeline 2 and a battery box body 3; the inside of the battery box 3 is partitioned into different sections by partitions 31, three sections are shown in fig. 1, an air inlet 32 and an air outlet 33 are respectively formed at two ends of each section, batteries 4 arranged in a matrix are respectively installed in each section, batteries 4 arranged in a 4 × 3 matrix are installed in each section in fig. 1 (the batteries 4 arranged in a 4 × 3 matrix are explained below), a temperature sensor 5 is arranged between two adjacent columns of batteries 4, that is, two temperature sensors 5 are arranged in each section, and the temperature sensor 5 is preferably located in the middle.
The second vent pipes 2 are respectively arranged in each section of the battery box body 3, each second vent pipe 2 respectively comprises a second main pipeline and second branch pipelines communicated with the second main pipeline, the number of the second branch pipelines is the same as that of the sections, the outlets of the second branch pipelines are positioned at the front ends of the batteries in the first row near the air inlet 32, the second main pipeline penetrates through the air inlet 32 and extends out of the battery box body 3, cold air is introduced into the sections from the second main pipeline to cool the batteries 4, and hot air after heat exchange is discharged from the air outlet 33, a temperature sensing wax type air volume adjusting valve 7 is respectively arranged in each second main pipeline, the temperature sensing wax type air volume adjusting valve 7 is automatically opened or closed according to a preset initial expansion critical temperature value, and the opening degree of the temperature-sensitive wax type air volume adjusting valve 7 is adaptively adjusted according to the temperature of the battery 4 in the interval, so that the air volume adjusting function of the second branch pipeline is realized.
Taking two sections in fig. 1 as an example, the batteries 4 in the two sections are independent from each other, and independent thermal management can be realized in each section, if the temperature in the section 1 is higher than the temperature rise in the section 2 during the running of the vehicle, the temperature sensing wax of the temperature sensing wax type air volume adjusting valve 7 in the section 1 is in an environment with relatively high temperature, the expansion amount of the temperature sensing wax is large, the opening degree of the temperature sensing wax type air volume adjusting valve 7 in the section 2 is also large, the opening degree of the temperature sensing wax type air volume adjusting valve 7 in the section 2 is smaller than the opening degree of the temperature sensing wax type air volume adjusting valve 7 in the section 1, and the flow rate of cold air entering the section 1 is larger than that of cold air entering the section 2, so that. The temperature sensing wax type air volume adjusting valve 7 can automatically realize that the flow of cold air entering the interval with large temperature rise is large, and the flow of cold air entering the interval with small temperature rise is small, thereby realizing the synchronism of different temperature rises and cooling, and avoiding the problem of obvious time difference of cooling in each interval.
The first ventilation duct 1 comprises a first main duct and first branch ducts communicating with the first main duct, the number of the first branch ducts being the same as the number of the second main ducts, and the two are in one-to-one correspondence, a first branch pipeline is communicated with a second main pipeline, the first main pipeline is communicated with an air outlet of the electric compressor A, an air inlet of the electric compressor A is communicated with an automobile air conditioner through an air conditioner pipeline 6, the automobile air conditioner is characterized in that an electromagnetic valve 8 is installed in an air conditioner pipeline, the electromagnetic valve 8 controls the opening and closing of the electromagnetic valve through an electromagnetic valve controller H, the electromagnetic valve is used for controlling the opening or closing of the air conditioner pipeline 6, cold air of the automobile air conditioner is dispersed into a second air duct 2 through a first air duct 1 by an electric compressor A, and then is introduced into each interval of a battery box body 3 through each temperature-sensitive wax type air volume adjusting valve 7 to cool batteries in each interval. Whether the batteries 4 in each section need to be cooled and the flow of the cold air needed are dually controlled by the temperature-sensing wax type air volume adjusting valves 7 and the temperature sensors 5 (whether heat management is needed or not and the heat management capacity is needed is only controlled by the temperature-sensing wax type air volume adjusting valves 7 when the air conditioner is started), the cold air exchanges heat with the air around the batteries 4 and takes away the hot air, and the temperature of the air around the batteries 4 is reduced.
The battery management control module F includes: 1. 2 … 2n +6 pins, wherein the pins 1-2n are sensor pins and are respectively connected with 2n temperature sensors 5, n is the number of the divided sections of the battery box body 3, and because two temperature sensors 5 are arranged in one section, the total number of the temperature sensors 5 is 2 n; the pin 2n +1 is a pin of the solenoid valve controller and is connected with the solenoid valve controller H; the pin 2n +2 and the pin 2n +3 are compressor controller pins respectively and are connected with a compressor controller B; the pin 2n +4 is a high-voltage relay pin and is connected with the high-voltage relay C; and the pin 2n +5 and the pin 2n +6 are two power supply pins and are respectively connected with the positive electrode and the negative electrode of the 12V power supply G.
The solenoid valve controller H comprises pins 1-5, wherein pin 1 is connected with pin 2n +1 of the battery management control module F, pin 2 is connected with the positive electrode of the 12V power supply G, pin 3 is connected with the negative electrode of the 12V power supply G, and pins 4 and 5 are respectively connected with the solenoid valve 8.
The compressor controller B comprises pins 1-9, the pin 1 is connected with the anode of a 12V power supply G after being connected with an automobile air conditioner switch D in series, the first pin is connected with the cathode of the 12V power supply G, the pin 3 is connected with the 2n +3 pin of a battery management control module F, the pin 5 is connected with the cathode of a power battery E, the pin 6 is connected with the 2n +2 pin of the battery management control module F, and the pins 7-9 are respectively connected with the electric compressor A.
The high-voltage relay C comprises a pin 30 and pins 85-87, the pin 30 and the pin 87 are relay pins, the pins 85 and 86 are coil pins, the pin 30 is connected with a pin 4 of the compressor controller B, the pin 85 is connected with the negative electrode of the 12V power supply G, the pin 86 is connected with a pin 2n +4 of the battery management control module F, and the pin 87 is connected with the negative electrode of the power battery E.
When the air conditioner needs to be started, the automobile air conditioner switch D is manually opened, the pin 1 of the compressor controller B is electrified by 12V +, so that the pins 1 and 2 of the compressor controller B form a 12V power supply, the pin 6 of the compressor controller B sends a 0V low level signal to the pin 2n +2 of the battery management control module F, the pin 2n +1 of the battery management control module F sends a 0V low level enable signal, the solenoid valve controller H works, the solenoid valve 8 is opened, then the pin 2n +4 of the battery management control module sends a 12V + high level signal to the coil pin 86 of the high-voltage relay C, the coil pins 85 and 86 are electrified by 12V, the relay pins 30 and 87 are switched on, the pins 4 and 5 of the electric compressor A obtain the electric power of the power battery E, the electric compressor A starts to work, and the air conditioner system runs.
When the air conditioner is operated, if the temperature rise of a certain battery branch exceeds a preset threshold (assumed to be 50 ℃), the temperature-sensitive wax type air volume regulating valve 7 of the branch is automatically opened, the temperature sensor 5 is not needed to participate in the work at the moment, cold air enters the branch to cool the ambient air of the battery 4, and when the temperature of the branch air is reduced to 35 ℃, the temperature-sensitive wax type air volume regulating valve 7 is automatically closed.
When the air conditioner is in a stop state, the electric compressor A does not work, the battery management control module F monitors the temperature of the battery 4 in real time through the temperature sensor 5, wherein the temperature sensors 1 and 2 are responsible for monitoring the temperature of the battery 4 in the first branch, the temperature sensors 2n-1 and 2n are responsible for monitoring the temperature of the battery 4 in the second branch, when the temperature of the air near any branch battery (taking the first branch as an example) is monitored to exceed 50 ℃, the battery management control module F receives a corresponding temperature sensor signal and inputs the temperature sensor signal to exceed a safety threshold (a sensor signal is 0-5V, 3V is set to correspond to 50 ℃), the pin 2n +4 of the battery management control module F sends a 12V + high-level signal to the coil pin 86 of the high-voltage relay C, the coil pins 85 and 86 are electrified by 12V, the relay pins 30 and 87 are switched on, and the pin 4, 5 obtaining the power of the power battery E, the electric compressor A works, because the air conditioner does not need to be started, the pin 2n +1 of the battery management control module F does not send out a 0V low level enable signal, the battery management control module F controls the electromagnetic valve 8 not to work at the moment, the air outlet of the air conditioner has no air, cold air completely enters the first ventilation pipeline 1, because the temperature exceeds 50 ℃, the temperature sensing wax type air quantity regulating valve 7 of the branch I is opened, the branch I carries out battery cooling, because the ambient air temperature of the branch II and III batteries is lower than 50 ℃, only the temperature sensing wax type air quantity regulating valve 7 of the branch I is opened, finally the heat management of the branch I battery is realized, when the battery management control module F receives the output signal of the ambient temperature sensor 5 of the branch I battery 4 and is lower than 35 ℃, the pin 2n +4 of the battery management control module F sends out a 0V low level signal to the coil pin 86, the 12V power is lost at coil pins 85 and 86, relay pins 30 and 87 are disconnected, pins 4 and 5 of the electric compressor A are unpowered, the electric compressor A stops working, and the thermal management of the battery in branch one is finished.
When the air conditioner is not started and the thermal management of the battery has special conditions, if the battery management control module F receives an output signal of the temperature sensor 5 around the battery 4 of the branch I, the output signal is higher than 50 ℃, and the temperature sensing wax of the temperature sensing wax type air volume regulating valve 7 of the branch I fails to work, so that the temperature sensing wax type air volume regulating valve 7 is closed, the electric compressor A still works at the moment, the air pressure in the pipeline rises, when the air pressure safety threshold is reached, the pin 3 of the compressor controller B sends a 0V low level signal to the pin 2n +3 of the battery management control module F, the pin 2n +4 of the battery management control module F sends a 0V low level signal to the coil pin 86 of the high-voltage relay C, the coil pins 85 and 86 lose 12V, the relay pins 30 and 87 are disconnected, the pins 4 and 5 of the electric compressor A do not have power electricity, the electric compressor A stops working, and the battery management control module F reports the fault of the temperature sensing, therefore, system protection when the temperature sensing wax fails is realized.
Fig. 3 shows the structure of the temperature-sensitive wax type air volume adjusting valve according to the embodiment of the present invention.
As shown in fig. 3, the temperature sensitive wax type air volume adjusting valve includes: an upper valve body 71, a lower valve body 72, a push rod 73, a valve clack 74, a temperature sensing bulb 75 and a pre-pressing spring 77; wherein, the temperature sensing bulb 75 is sealed at the bottom of the lower valve body 72 through a sealing cover 78, the temperature sensing wax 76 is sealed in the temperature sensing bulb 75, and the temperature sensing wax 76 is characterized by thermal expansion and cooling retraction; the upper valve body 71 is buckled on the lower valve body 72, the interior of the upper valve body 71 is divided into two cavities through the inner wall according to the air inlet direction, an opening is formed in the inner wall, the valve clack 74 is sleeved at the top end of the push rod 73, the bottom end of the push rod 73 downwards penetrates through the opening of the inner wall and is inserted into the temperature sensing wax 76, when the temperature sensing wax 76 is heated and expanded, the push rod 73 is pushed to move upwards, the valve clack 74 at the top end of the push rod 73 opens the opening, the more serious the temperature sensing wax 76 is heated, the larger the opening degree of the opening is, and when the temperature sensing wax 76 is cooled and retracted; a circle of boss 731 protrudes from the middle of the push rod 73, the pre-pressing spring 77 is sleeved on the push rod 73 and is limited between the boss 731 and the lower valve body 72, the pre-pressing spring 77 is used for providing a downward elastic force to the push rod 73, and when the temperature-sensitive wax 76 is not heated to expand or pushes the push rod 3 downward, the valve clack 74 can close the opening.
The initial expansion critical temperature of the temperature sensing wax 76 is set to 35 ℃ (different critical temperatures can be realized by proportioning the temperature sensing wax 76 according to different requirements), when the temperature in the section where a certain branch battery is located exceeds 50 ℃ (the temperature can be set according to the actual requirement of the battery), the battery management control module F controls the electric compressor A to start, because the air temperature around the branch battery 4 is 50 ℃ (the temperature exceeds the initial expansion critical temperature by 35 ℃), the branch temperature sensing wax type air volume regulating valve 7 is opened before the electric compressor A starts, cold air enters the branch, when the temperature in the section is less than or equal to 35 ℃, the battery management control module F controls the electric compressor A to close, because the temperature in the section is reduced to the initial expansion critical temperature by 35 ℃, the branch temperature sensing wax type air volume regulating valve 7 is closed.
If more than two branches reach 50 ℃, taking the first branch and the second branch as an example, the battery management control module F controls the electric compressor A to start, and because the temperatures of the first branch and the second branch exceed 35 ℃ before the electric compressor A starts, the temperature-sensitive wax type air volume regulating valves 7 of the first branch and the second branch are both opened, cold air respectively enters the first branch and the second branch, if the temperature rise difference of the first branch and the second branch is extremely large, namely, the temperature rise of the first branch is obviously higher than that of the second branch, in the cooling process, because the temperature of the first branch is higher than that of the second branch, the opening degree of the temperature-sensing wax type air volume regulating valve 7 of the first branch is larger than that of the temperature-sensing wax type air volume regulating valve 7 of the second branch, and the air intake quantity of the first branch is larger than that of the second branch, the temperature reduction of the first branch and the temperature reduction of the second branch tend to be synchronous, the problems that the temperature reduction of the first branch is slow and the temperature reduction of the second branch is fast are avoided, and the temperature reduction synchronism is improved through the. And when the first branch and the second branch reach 35 ℃, the battery management control module F controls the electric compressor A to be closed.
The above embodiments are only specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention, and all should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (2)
1. The utility model provides an electric automobile power battery temperature management system which characterized in that includes: the system comprises an electric compressor, a compressor controller, a high-voltage relay, a power battery, a battery management control module, a 12V power supply, a first ventilating duct, a second ventilating duct and a battery box body; wherein,
the battery box is divided into different sections by partitions, the two ends of each section are respectively provided with an air inlet and an air outlet, batteries arranged in a matrix manner are respectively arranged in each section, and a temperature sensor is arranged between two adjacent columns of batteries;
the second ventilation pipelines are respectively arranged in each section of the battery box body, each second ventilation pipeline respectively comprises a second main pipeline and a second branch pipeline communicated with the second main pipeline, the outlet of each second branch pipeline is positioned at the front end of the first row of batteries, the second main pipeline penetrates through the air inlet and extends out of the battery box body, and a temperature-sensing wax type air volume regulating valve is arranged in each second main pipeline;
the first ventilation pipeline comprises a first main pipeline and a first branch pipeline communicated with the first main pipeline, the first branch pipeline is communicated with the second main pipeline, the first main pipeline is communicated with an air outlet of the electric compressor, an air inlet of the electric compressor is communicated with an automobile air conditioner through an air conditioner pipeline, and an electromagnetic valve controlled to be opened and closed by an electromagnetic valve controller is installed in the air conditioner pipeline;
the battery management control module comprises n sensor pins, an electromagnetic valve controller pin, two compressor controller pins, a high-voltage relay pin and two power supply pins; the number n is equal to the number of the temperature sensors, the n sensor pins are respectively connected with one temperature sensor, and the two power supply pins are respectively connected with the positive electrode and the negative electrode of the 12V power supply;
the electromagnetic valve controller comprises five pins, wherein a first pin is connected with the pin of the electromagnetic valve controller, a second pin is connected with the positive electrode of the 12V power supply, a third pin is connected with the negative electrode of the 12V power supply, and a fourth pin and a fifth pin are connected with the electromagnetic valve;
the compressor controller comprises nine pins, a first pin is connected with a positive electrode of the 12V power supply after being connected with an automobile air conditioner switch in series, the first pin is connected with a negative electrode of the 12V power supply, a third pin and a sixth pin are connected with two compressor controller pins, a fifth pin is connected with a negative electrode of the power battery, and seventh to ninth pins are respectively connected with the electric compressor;
the high-voltage relay comprises two coil pins and two relay pins, wherein one coil pin is connected with the negative electrode of the 12V power supply, and the other coil pin is connected with the high-voltage relay pin; one of the relay pins is connected with a fourth pin of the compressor controller, and the relay pin is connected with the positive electrode of the power battery.
2. The temperature management system for the power battery of the electric vehicle according to claim 1, wherein the temperature-sensitive wax type air volume adjusting valve comprises: the upper valve body, the lower valve body, the push rod, the valve clack and the temperature sensing bulb; the temperature sensing bulb is sealed at the bottom of the lower valve body through a sealing cover, and temperature sensing wax is sealed in the temperature sensing bulb; the upper valve body is buckled on the lower valve body, the interior of the upper valve body is divided into two cavities through an inner wall according to the air inlet direction, an opening is formed in the inner wall, the valve clack is sleeved at the top end of the push rod, the bottom end of the push rod downwards penetrates through the opening to be inserted into the temperature sensing wax, and the valve clack at the top end of the push rod opens or closes the opening; the middle position of the push rod is provided with a circle of boss in a protruding mode, the push rod is sleeved with a pre-pressing spring, and the pre-pressing spring is limited between the boss and the lower valve body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821754698.6U CN208674326U (en) | 2018-10-29 | 2018-10-29 | Electric automobile power battery temperature management system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821754698.6U CN208674326U (en) | 2018-10-29 | 2018-10-29 | Electric automobile power battery temperature management system |
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| Publication Number | Publication Date |
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| CN208674326U true CN208674326U (en) | 2019-03-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821754698.6U Expired - Fee Related CN208674326U (en) | 2018-10-29 | 2018-10-29 | Electric automobile power battery temperature management system |
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| CN (1) | CN208674326U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20230095011A (en) * | 2021-12-21 | 2023-06-28 | 주식회사 엘지에너지솔루션 | Battery pack, and ESS and Vehicle comprising the battery pack |
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2018
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20230095011A (en) * | 2021-12-21 | 2023-06-28 | 주식회사 엘지에너지솔루션 | Battery pack, and ESS and Vehicle comprising the battery pack |
| KR102664449B1 (en) * | 2021-12-21 | 2024-05-10 | 주식회사 엘지에너지솔루션 | Battery pack, and ESS and Vehicle comprising the battery pack |
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| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
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| CF01 | Termination of patent right due to non-payment of annual fee |