Hybrid electric battery locomotive thermal management temperature control device

Abstract

The application discloses a kind of hybrid power battery pack locomotive thermal management temperature control device, including locomotive microcomputer, air conditioner controller, air conditioning system and power battery module;The temperature of the power battery module is obtained by the temperature sensor of the locomotive microcomputer, and the highest temperature, the lowest temperature and the average temperature of the power battery module are calculated, then the highest temperature, the lowest temperature and the average temperature of the power battery module calculated are sent to the air conditioner controller;The air conditioner controller controls the air conditioning system to enter corresponding operation mode and operating state according to the temperature information of the power battery module sent by the locomotive microcomputer, and the air conditioning system exchanges heat with the power battery module to adjust the temperature of the power battery module.The application can automatically, effectively and quickly realize battery thermal management, automatically control air conditioning mode using temperature sensor, so that battery thermal management is more energy-saving.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of locomotive thermal management, in particular to a hybrid power storage group locomotive thermal management temperature control device. BACKGROUND

[0002] The locomotive head has only one diesel engine to work; fuel burns in the cylinder, and the high-temperature and high-pressure gas generated expands in the cylinder to push the piston reciprocating motion, and the connecting rod drives the crankshaft to rotate to do work outside, and the heat energy of the fuel is converted into mechanical work. The power generated by the diesel engine is transmitted to the transmission device, and through the control and adjustment of the diesel engine and the transmission device, the output speed and torque suitable for the operating conditions of the locomotive are sent to each axle gear box to drive the driving wheel, and the wheel circumference traction force generated by the driving wheel is transmitted to the frame, and the traction force of the drawbar is changed by the drawbar at the end of the frame to pull or push the vehicle.

[0003] The locomotive adds two groups of high-power motors as additional work on the basis of a single diesel engine, and each group of motors is powered by two groups of large-capacity batteries. Since the overcooling of the battery will cause the loss of electricity, and the overheating will have the danger of fire, the temperature of the battery needs to be adjusted.

[0004] Therefore, a hybrid power storage group locomotive thermal management temperature control device is needed, which can automatically, effectively and quickly realize battery thermal management, automatically control the air conditioning mode by using a temperature sensor, and make the battery thermal management more energy-saving. SUMMARY

[0005] The present application aims to overcome the shortcomings of the prior art and provide a hybrid power storage group locomotive thermal management temperature control device, which can automatically, effectively and quickly realize battery thermal management, automatically control the air conditioning mode by using a temperature sensor, and make the battery thermal management more energy-saving.

[0006] To achieve the above-mentioned application purposes, the technical solutions adopted by the present application are as follows:

[0007] The present application provides a hybrid power storage group locomotive thermal management temperature control device: a hybrid power storage group locomotive thermal management temperature control device applied to a hybrid power storage group locomotive, which comprises a locomotive microcomputer, an air conditioner controller, an air conditioning system and a power battery module arranged on the locomotive, wherein the power battery module, the locomotive microcomputer, the air conditioner controller and the air conditioning system are connected in sequence.

[0008] The locomotive microcomputer obtains the temperature of the power battery module through a temperature sensor, calculates the maximum temperature, the minimum temperature and the average temperature of the power battery module, and then sends the calculated maximum temperature, the minimum temperature and the average temperature of the power battery module to the air conditioner controller.

[0009] The air conditioner controller controls the air conditioner system to enter corresponding operation mode and operation state according to the highest temperature, the lowest temperature and the average temperature of the power battery module sent by the locomotive microcomputer, and the air conditioner system exchanges heat with the power battery module to adjust the temperature of the power battery module.

[0010] Preferably, the air conditioner system comprises a first air conditioner unit and a second air conditioner unit, and the first air conditioner unit and the second air conditioner unit are connected with the air conditioner controller; the power battery module comprises a first battery pack, a second battery pack, a third battery pack and a fourth battery pack; the first battery pack and the second battery pack are connected with the first air conditioner unit through a pipeline to form an A heat exchange branch and a B heat exchange branch; the third battery pack is connected with the second air conditioner unit through a pipeline to form a C heat exchange branch and a D heat exchange branch.

[0011] Preferably, the locomotive microcomputer obtains the temperature of the battery pack corresponding to each heat exchange branch through a temperature sensor, calculates the highest temperature THn, the lowest temperature TLn and the average temperature Tavr_n of each battery pack, and then sends them to the air conditioner controller; the air conditioner controller controls the first air conditioner unit and the second air conditioner unit to enter corresponding operation mode and operation state according to the temperature information of each battery pack sent by the locomotive microcomputer; the first air conditioner unit exchanges heat with the first battery pack and the second battery pack through the A heat exchange branch and the B heat exchange branch to adjust the temperature of the first battery pack and the second battery pack; the second air conditioner unit exchanges heat with the third battery pack and the fourth battery pack through the C heat exchange branch and the D heat exchange branch to adjust the temperature of the third battery pack and the fourth battery pack.

[0012] Preferably, the locomotive microcomputer calculates the average temperature Tavr_n of the corresponding battery pack of each branch according to the highest temperature THn and the lowest temperature TLn of the corresponding battery pack of each heat exchange branch: assuming that the highest temperature of the A heat exchange branch is TH1 and the lowest temperature is TL1; the highest temperature of the B heat exchange branch is TH2 and the lowest temperature is TL2; the highest temperature of the C heat exchange branch is TH3 and the lowest temperature is TL3; the highest temperature of the D heat exchange branch is TH4 and the lowest temperature is TL4;

[0013] The average temperature of the battery pack corresponding to the A heat exchange branch is:

[0014] Tavr_1=(TH1+TL1) / 2;

[0015] The average temperature of the battery pack corresponding to the B heat exchange branch is:

[0016] Tavr_2=(TH2+TL2) / 2;

[0017] The average temperature of the battery group corresponding to the C heat exchange branch is:

[0018] Tavr_3 = (TH3 + TL3) / 2;

[0019] The average temperature of the battery group corresponding to the D heat exchange branch is:

[0020] Tavr_4 = (TH4 + TL4) / 2.

[0021] Preferably, the locomotive microcomputer compares the average temperatures of the battery groups corresponding to each heat exchange branch, calculates the maximum and minimum values among the average temperatures, i.e. the maximum average temperature Tavr_max and the minimum average temperature Tavr_min, and the specific calculation is as follows:

[0022] Tavr_max = MAX (Tavr_1, Tavr_2, Tavr_3, Tavr_4),

[0023] Tavr_min = MIN (Tavr_1, Tavr_2, Tavr_3, Tavr_4);

[0024] The locomotive microcomputer calculates the difference between the maximum average temperature Tavr_max and the minimum average temperature Tavr_min according to the obtained maximum average temperature Tavr_max and minimum average temperature Tavr_min.

[0025] Preferably, the initial control mode of the first air conditioning unit and the second air conditioning unit is an automatic control mode; the locomotive microcomputer performs air conditioning control mode judgment every 6 minutes according to the difference between the maximum average temperature and the minimum average temperature.

[0026] When TLn≤5℃, the air conditioning system enters the heating mode, and the air conditioning system heats;

[0027] When 27℃≤Tavr_max≤40℃, and Tavr_max-Tavr_min>3℃, the air conditioning system enters the balance mode;

[0028] When 27℃≤Tavr_max≤40℃, and Tavr_max-Tavr_min≤2.4℃, the air conditioning system enters the automatic control mode;

[0029] When 40℃<Tavr_max, the air conditioning system enters the forced cooling mode.

[0030] Preferably, when 35℃<Tavr_max<40℃, all four heat exchange branches are in the semi-cooling mode;

[0031] When THn≥39℃, the corresponding heat exchange branch starts the semi-cooling mode alone;

[0032] When Tavr_max < 28℃, then all the 4 heat exchange branches air conditioners exit the semi-cold mode and stop working;

[0033] When THn < 30℃, then the corresponding branch exits the semi-cold mode and stops working;

[0034] When 37℃ < Tavr_max < 40℃ and Tavr_n-Tavr_min ≥ 4℃, then the heat exchange branch enters the full-cold mode;

[0035] When 37℃ < Tavr_max < 40℃ and Tavr_n-Tavr_min ≤ 2℃, then the heat exchange branch exits the full-cold mode and enters the semi-cold mode;

[0036] When 32℃ ≤ Tavr_max ≤ 35℃ and (THn-TLn) > 4℃, then the air conditioning unit corresponding to the heat exchange branch is ventilated; when (THn-TLn) ≤ 3℃, then the air conditioning unit corresponding to the heat exchange branch stops being ventilated, or when Tavr_max < 31℃, all the air conditioning units corresponding to the heat exchange branches exit the ventilation and stop working.

[0037] Advantageous effects

[0038] Compared with the prior art, the application has the following advantageous effects: the application provides a hybrid power storage group locomotive thermal management temperature control device, which can automatically, effectively and quickly realize battery thermal management, automatically control the air conditioning mode by using a temperature sensor, make the battery thermal management more energy-saving, effectively improve the stability of the battery work and prolong the service life of the battery. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 is the schematic diagram of the application;

[0040] Figure 2 is the mode condition conversion diagram of the application;

[0041] Figure 3 is the balance mode condition conversion diagram of the application;

[0042] Figure 4 is the heating mode condition conversion diagram of the application;

[0043] Figure 5 is the part of the program diagram of the control algorithm of the application. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical scheme and advantages of the present application more clear, complete and detailed, the present application is further described in detail below in combination with embodiments. Obviously, the following described embodiments are some embodiments of the present application, but the scope of the present application claimed is not limited to the following specific embodiments.

[0045] As shown in Figures 1 to 5 A hybrid electric vehicle thermal management temperature control device applied to a hybrid electric vehicle, the device includes a vehicle microcomputer, an air conditioner controller, an air conditioning system and a power battery module arranged on the vehicle, the power battery module, the vehicle microcomputer, the air conditioner controller and the air conditioning system are connected in sequence; the air conditioning system includes a first air conditioning unit and a second air conditioning unit, the first air conditioning unit and the second air conditioning unit are connected with the air conditioner controller; the power battery module includes a first battery pack, a second battery pack, a third battery pack and a fourth battery pack; the first battery pack and the second battery pack are connected with the first air conditioning unit through a pipeline, forming A heat exchange branch and B heat exchange branch; the third battery pack is connected with the second air conditioning unit through a pipeline, forming C heat exchange branch and D heat exchange branch.

[0046] The vehicle microcomputer obtains the temperature of the battery pack corresponding to each heat exchange branch through a temperature sensor, and calculates the highest temperature THn, the lowest temperature TLn and the average temperature Tavr_n of each battery pack, and then sends the calculated highest temperature THn, the lowest temperature TLn and the average temperature Tavr_n of each battery pack to the air conditioner controller, the air conditioner controller controls the first air conditioning unit and the second air conditioning unit to enter the corresponding running mode and running state according to the temperature information of each battery pack sent by the vehicle microcomputer; the first air conditioning unit exchanges heat with the first battery pack and the second battery pack through A heat exchange branch and B heat exchange branch respectively to adjust the temperature of the first battery pack and the second battery pack; the second air conditioning unit exchanges heat with the third battery pack and the fourth battery pack through C heat exchange branch and D heat exchange branch respectively to adjust the temperature of the third battery pack and the fourth battery pack.

[0047] The vehicle microcomputer calculates the average temperature Tavr_n of the corresponding battery pack of each branch according to the highest temperature THn and the lowest temperature TLn of the corresponding battery pack of each heat exchange branch: assuming that the highest temperature of the A heat exchange branch is TH1 and the lowest temperature is TL1; the highest temperature of the B heat exchange branch is TH2 and the lowest temperature is TL2; the highest temperature of the C heat exchange branch is TH3 and the lowest temperature is TL3, the highest temperature of the D heat exchange branch is TH4 and the lowest temperature is TL4;

[0048] The average temperature of the battery pack corresponding to the A heat exchange branch is:

[0049] Tavr_1 = (TH1 + TL1) / 2;

[0050] The average temperature of the battery group corresponding to the B heat exchange branch is:

[0051] Tavr_2 = (TH2 + TL2) / 2;

[0052] The average temperature of the battery group corresponding to the C heat exchange branch is:

[0053] Tavr_3 = (TH3 + TL3) / 2;

[0054] The average temperature of the battery group corresponding to the D heat exchange branch is:

[0055] Tavr_4 = (TH4 + TL4) / 2.

[0056] The locomotive microcomputer compares the average temperatures of the battery groups corresponding to each heat exchange branch, calculates the maximum and minimum values among the average temperatures, i.e. the maximum average temperature Tavr_max and the minimum average temperature Tavr_min, and the specific calculation is as follows:

[0057] Tavr_max = MAX(Tavr_1, Tavr_2, Tavr_3, Tavr_4),

[0058] Tavr_min = MIN(Tavr_1, Tavr_2, Tavr_3, Tavr_4);

[0059] The locomotive microcomputer calculates the difference between the maximum average temperature Tavr_max and the minimum average temperature Tavr_min according to the obtained maximum average temperature Tavr_max and minimum average temperature Tavr_min.

[0060] As shown in Figure 2 The initial control mode of the first air conditioning unit and the second air conditioning unit is automatic control mode; the locomotive microcomputer performs air conditioning control mode judgment every 6 minutes according to the difference between the maximum average temperature and the minimum average temperature.

[0061] When TLn≤5℃, the air conditioning system enters the heating mode, and the air conditioner heats; the specific process is as follows:

[0062] When TL1≤5℃, the first air conditioning unit enters the heating mode, and the air conditioner heats;

[0063] When TL2≤5℃, the first air conditioning unit enters the heating mode, and the air conditioner heats;

[0064] When TL3≤5℃, the second air conditioning unit enters the heating mode, and the air conditioner heats;

[0065] When TL4≤5℃, the second air conditioning unit enters the heating mode, and the air conditioning heats;

[0066] When 27℃≤Tavr_max≤40℃, and Tavr_max-Tavr_min>3℃, the air conditioning system enters the balance mode;

[0067] When 27℃≤Tavr_max≤40℃, and Tavr_max-Tavr_min≤2.4℃, the air conditioning system enters the automatic control mode;

[0068] When 40℃<Tavr_max, the air conditioning system enters the forced refrigeration mode.

[0069] As shown in Figure 3 When 35℃<Tavr_max<40℃, the four heat exchange branches are all in the semi-cooling mode;

[0070] When THn≥39℃, the corresponding heat exchange branch starts the semi-cooling mode alone; specifically as follows:

[0071] When TH1≥39℃, the A heat exchange branch starts the semi-cooling mode alone;

[0072] When TH2≥39℃, the B heat exchange branch starts the semi-cooling mode alone;

[0073] When TH3≥39℃, the C heat exchange branch starts the semi-cooling mode alone;

[0074] When TH4≥39℃, the D heat exchange branch starts the semi-cooling mode alone;

[0075] When Tavr_max<28℃, the four heat exchange branches of the air conditioning all exit the semi-cooling mode and stop working;

[0076] When THn<30℃, the corresponding branch exits the semi-cooling mode and stops working;

[0077] When 37℃<Tavr_max<40℃ and Tavr_n-Tavr_min≥4℃, the heat exchange branch enters the full-cooling mode;

[0078] When 37℃<Tavr_max<40℃ and Tavr_n-Tavr_min≤2℃, the heat exchange branch exits the full-cooling mode and enters the semi-cooling mode;

[0079] When 32℃≤Tavr_max≤35℃, and (THn-TLn)>4℃, the heat exchange branch corresponding air conditioning unit ventilates;

[0080] When (TH1-TL1)≤3℃, the first air conditioning unit corresponding to the A heat exchange branch stops ventilating;

[0081] When (TH2-TL2)≤3℃, the first air conditioning unit corresponding to B heat exchange branch stops ventilation;

[0082] When (TH3-TL3)≤3℃, the second air conditioning unit corresponding to C heat exchange branch stops ventilation;

[0083] When (TH4-TL4)≤3℃, the second air conditioning unit corresponding to D heat exchange branch stops ventilation;

[0084] When Tavr_max<31℃, all air conditioning units corresponding to heat exchange branches exit ventilation and stop working.

[0085] If the power battery communication network fails, the return air temperature (Th) detected by the temperature sensor inside the first air conditioning unit and the second air conditioning unit is controlled. Since the automatic mode and the balance mode in the meta mode may have conditional coincidence, the sub-mode conversion conditions in the two modes may also have coincidence. If programmed according to the normal programming idea, multiple states may start together, causing program crashes. Therefore, the sequential programming in the Siemens PLC is used to simplify the number of programs and improve the efficiency of program operation.

[0086] As shown in Figure 4 and Figure 5 , Figure 4 is the sequential programming schematic diagram of the application, Figure 5 is part of the program diagram of the control algorithm of the application. The sequential programming principle of the application is as follows:

[0087] IF:Previous_State=S1&Transition

[0088] THEN:Current_State=S2

[0089] END_IF

[0090] IF:Previous_State=S1&Transition

[0091] THEN:Current_State=S3

[0092] END_IF

[0093] Previous_State=Current_State

[0094] The application provides a hybrid power storage group locomotive thermal management temperature control device, which can automatically, effectively and quickly realize battery thermal management, automatically control an air conditioning mode by using a temperature sensor, make the battery thermal management more energy-saving, effectively improve the stability of the power battery and prolong the service life of the power battery.

[0095] The above merely provides a specific implementation manner of the application, but the protection scope of the application is not limited to this, any change or replacement within the technical scope disclosed in the application should be covered in the protection scope of the application. According to the disclosure and teaching of the above description, the person skilled in the art can also change and modify the above implementation manners. Therefore, the application is not limited to the specific implementation manners disclosed and described above, and some modifications and changes of the application should fall into the protection scope of the claims of the application. In addition, although some specific terms are used in the specification, these terms are only used for convenience and do not constitute any limitation on the application.

Claims

1. A thermal management temperature control device for a hybrid power storage locomotive, applied to a hybrid power storage locomotive, characterized in that: The device includes a locomotive microcomputer, an air conditioning controller, an air conditioning system, and a power battery module installed on the locomotive, wherein the power battery module, the locomotive microcomputer, the air conditioning controller, and the air conditioning system are connected in sequence. The vehicle's microcomputer obtains the temperature of the power battery module through a temperature sensor, calculates the highest temperature, lowest temperature, and average temperature of the power battery module, and then sends the calculated highest temperature, lowest temperature, and average temperature of the power battery module to the air conditioning controller. The air conditioning controller controls the air conditioning system to enter the corresponding operating mode and operating state based on the highest temperature, lowest temperature and average temperature of the power battery module sent by the locomotive microcomputer. The air conditioning system regulates the temperature of the power battery module by exchanging heat with the power battery module. The air conditioning system includes a first air conditioning unit and a second air conditioning unit, which are connected to the air conditioning controller. The power battery module includes a first battery pack, a second battery pack, a third battery pack, and a fourth battery pack. The first and second battery packs are connected to the first air conditioning unit via pipes to form heat exchange branch A and heat exchange branch B. The third and fourth battery packs are connected to the second air conditioning unit via pipes to form heat exchange branch C and heat exchange branch D. The locomotive microcomputer acquires the temperature of the battery pack corresponding to each heat exchange branch through temperature sensors, calculates the highest temperature THn, lowest temperature TLn, and average temperature Tavr_n of each battery pack, and then sends this information to the air conditioning controller. Based on the temperature information of each battery pack sent by the locomotive microcomputer, the air conditioning controller controls the first and second air conditioning units to enter the corresponding operating modes and states. The first air conditioning unit exchanges heat with the first and second battery packs through heat exchange branches A and B, respectively, to regulate the temperatures of the first and second battery packs. The second air conditioning unit exchanges heat with the third and fourth battery packs through heat exchange branches C and D, respectively, to regulate the temperatures of the third and fourth battery packs. The locomotive microcomputer calculates the average temperature Tavr_n of the battery pack corresponding to each heat exchange branch based on the highest temperature THn and the lowest temperature TLn of the battery pack corresponding to each heat exchange branch: assuming that the highest temperature of heat exchange branch A is TH1 and the lowest temperature is TL1; the highest temperature of heat exchange branch B is TH2 and the lowest temperature is TL2; the highest temperature of heat exchange branch C is TH3 and the lowest temperature is TL3; and the highest temperature of heat exchange branch D is TH4 and the lowest temperature is TL4. The average temperature of the battery pack corresponding to heat exchange branch A is: Tavr_1=(TH1+TL1) / 2; The average temperature of the battery pack corresponding to heat exchange branch B is: Tavr_2=(TH2+TL2) / 2; The average temperature of the battery pack corresponding to the C heat exchange branch is: Tavr_3=(TH3+TL3) / 2; The average temperature of the battery pack corresponding to the D heat exchange branch is: Tavr_4=(TH4+TL4) / 2; The locomotive microcomputer compares the average temperature of the battery packs corresponding to each heat exchange branch and calculates the maximum and minimum values ​​of each average temperature, that is, it calculates the maximum average temperature Tavr_max and the minimum average temperature Tavr_min. The specific calculation is as follows: Tavr_max=MAX(Tavr_1, Tavr_2, Tavr_3, Tavr_4), Tavr_min=MIN(Tavr_1, Tavr_2, Tavr_3, Tavr_4); The locomotive microcomputer calculates the difference between the maximum average temperature Tavr_max and the minimum average temperature Tavr_min, i.e., Tavr_max - Tavr_min. When 35℃ < Tavr_max < 40℃, all four heat exchange branches are in semi-cold mode; When THn≥39℃, the corresponding heat exchange branch will start semi-cooling mode separately. When Tavr_max < 28℃, all four heat exchange branch air conditioners will exit the semi-cooling mode and stop working. When THn < 30℃, the corresponding heat exchange branch will exit the semi-cooling mode and stop working; When 37℃ < Tavr_max < 40℃ and Tavr_n - Tavr_min ≥ 4℃, the corresponding heat exchange branch enters the full cooling mode. When 37℃ < Tavr_max < 40℃ and Tavr_n - Tavr_min ≤ 2℃, the corresponding heat exchange branch exits the full cooling mode and enters the semi-cooling mode. When 32℃≤Tavr_max≤35℃ and (THn- TLn)>4℃, the air conditioning unit corresponding to the heat exchange branch will ventilate; when (THn- TLn)≤3℃, the air conditioning unit corresponding to the heat exchange branch will stop ventilating; or when Tavr_max<31℃, all air conditioning units corresponding to the heat exchange branches will stop ventilating and cease operation.

2. The hybrid power storage locomotive thermal management temperature control device according to claim 1, characterized in that: The first and second air conditioning units are initially controlled in automatic mode; the locomotive microcomputer determines the air conditioning control mode every 6 minutes based on the difference between the maximum and minimum average temperatures. When TLn ≤ 5℃, the air conditioning system enters heating mode and the air conditioner starts heating. When 27℃≤Tavr_max≤40℃ and Tavr_max-Tavr_min>3℃, the air conditioning system enters the balance mode. When 27℃≤Tavr_max≤40℃ and Tavr_max-Tavr_min≤2.4℃, the air conditioning system enters automatic control mode. When 40℃ < Tavar_max, the air conditioning system enters forced cooling mode.

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