An anti-condensation system for the battery compartment of an integrated bus roof and its control method

Abstract

The present invention discloses a dew condensation prevention system for a battery compartment of an integrated bus roof and a control method thereof, which relates to the technical field of electric buses. It includes a battery compartment integrally arranged on the bus roof, and a plurality of battery modules are arranged at intervals in the battery compartment; the battery compartment is provided with an air inlet and an air outlet, and a first one-way valve and a second one-way valve are respectively arranged at the air inlet and the air outlet; the dew condensation prevention system includes an air pump, a dryer and a vehicle control module arranged outside the battery compartment; the vehicle control module is controllably connected to the air pump; the air pump is sequentially connected to the dryer and the first one-way valve through a ventilation circuit. During operation, if the air humidity in the battery compartment is relatively high, dry air can be regularly injected into the battery compartment through the air pump and the dryer, so that the moist air is discharged to the outside of the vehicle through the second one-way valve from the air outlet, thereby ensuring that the air in the battery compartment remains dry and preventing dew condensation from occurring when the temperature difference between the inside and outside of the compartment is relatively large, effectively overcoming the problems existing in the prior art.

Description

Technical Field

[0001] The present invention relates to the technical field of electric buses, and in particular to a dew condensation prevention system for a battery compartment of an integrated bus roof and a control method therefor. Background Art

[0002] According to different arrangement positions, the power batteries of electric buses can be roughly divided into top-mounted batteries, rear-mounted batteries, and bottom-mounted batteries. Among them, top-mounted batteries refer to arranging the batteries on the bus roof. In the prior art, the assembled battery pack is usually used as an independent component and directly assembled onto the bus roof through a mounting bracket. This arrangement has problems such as low integration degree and large occupied space, and cannot make full use of the roof space, and the number of battery packs carried is also limited.

[0003] MTV technology (Module to Vehicle) means setting a battery compartment on the bus roof and using the roof as the box body of the battery pack, and directly arranging the battery modules in the battery compartment, thereby overcoming the defects of the prior art and realizing the high integration of the battery pack and the roof. However, after integration using MTV technology, dew condensation is likely to occur in the battery compartment, which may cause insulation problems. This is because: on the one hand, after integration, the space of the battery compartment on the roof greatly increases, and there is also more gas in the compartment. Therefore, when the temperature difference between the inside and outside is large, dew condensation is likely to occur in the battery compartment; on the other hand, after integration, the liquid cooling plates of each battery module are all arranged in the battery compartment, so it will increase the temperature difference degree between the inside and outside of the compartment, and thus dew condensation is more likely to occur.

[0004] Based on this, we provide a dew condensation prevention system for a battery compartment of an integrated bus roof and a control method therefor. Summary of the Invention

[0005] The present invention provides a dew condensation prevention system for a battery compartment of an integrated bus roof and a control method therefor, and its main purpose is to solve the problems existing in the prior art.

[0006] The present invention adopts the following technical solutions:

[0007] A dew condensation prevention system for a battery compartment of an integrated bus roof, including a battery compartment integrally arranged on the bus roof, and a plurality of battery modules are arranged in the battery compartment at intervals; the battery compartment is provided with an air inlet and an air outlet, and a first one-way valve and a second one-way valve are respectively provided at the air inlet and the air outlet; the dew condensation prevention system includes a gas pump, a dryer and a vehicle control module arranged outside the battery compartment; the vehicle control module is controllably connected to the gas pump; the gas pump is sequentially connected to the dryer and the first one-way valve through a ventilation circuit.

[0008] Further, the anti-condensation system further includes a first humidity sensor, a second humidity sensor, and a third humidity sensor that are controllably connected to the vehicle control module; the first humidity sensor is disposed beside the air inlet in the battery compartment; the second humidity sensor is disposed beside the air outlet in the battery compartment; the third humidity sensor is disposed between the dryer and the first one-way valve.

[0009] Furthermore, the air pump is disposed on the bus chassis; the anti-condensation system further includes a three-way valve and vehicle-use air components; three interfaces of the three-way valve are respectively connected to the air pump, the dryer, and the vehicle-use air components, and the three-way valve is controllably connected to the vehicle control module.

[0010] Still further, the anti-condensation system further includes a first solenoid valve and a second solenoid valve that are controllably connected to the vehicle control module; the first solenoid valve is disposed between the vehicle-use air components and the three-way valve; the second solenoid valve is disposed between the three-way valve and the dryer.

[0011] A control method for the anti-condensation system of the battery compartment of the integrated bus roof as described above includes the following steps:

[0012] (1) After the vehicle is powered on, if the vehicle control module detects that the real-time humidity value X in the battery compartment exceeds the preset humidity value X1, the second solenoid valve and the air pump are turned on, thereby starting the air exchange process for the battery compartment;

[0013] (2) The vehicle control module accumulates the current air exchange into the total air exchange times Z, simultaneously times the working time of the air pump, and continuously monitors the real-time humidity value X in the battery compartment;

[0014] (3) Within the preset time Y2, if the real-time humidity value X in the battery compartment does not exceed the preset humidity value X1, the air exchange is stopped, and the recorded total air exchange times Z are cleared;

[0015] (4) If the preset time Y2 is exceeded and the real-time humidity value X in the battery compartment still exceeds the preset humidity value X1, the vehicle control module determines whether the recorded total air exchange times Z exceed the preset times Z1. If the preset times Z1 are exceeded, the current air exchange is stopped, and a fault alarm is issued to remind the user to detect the sealing and insulation conditions of the battery compartment; if the preset times Z1 are not exceeded, the current air exchange is stopped, and the above steps are repeated after the next power-on, and so on in a cycle.

[0016] Furthermore, the vehicle control module records the ventilation time of each ventilation at the end of each ventilation; in step (4), if the total number of ventilations Z does not exceed the preset number Z1, it is judged whether the time interval between the previous ventilation and the current ventilation exceeds the preset time interval Y3. If it exceeds the preset time interval Y3, the recorded total number of ventilations Z is cleared; if it does not exceed the preset time interval Y3, the recorded total number of ventilations Z is not cleared.

[0017] Furthermore, in step (2), when the working time of the air pump exceeds the preset time Y1, the vehicle control module first judges whether the humidity value of the third humidity sensor exceeds the preset humidity value X2. If it exceeds the preset humidity value X2, the vehicle instrument is used to remind that the dryer is abnormal and the ventilation is stopped; if it does not exceed the preset humidity value X2, within the time period of Y1 - Y2, the vehicle control module continuously monitors the real-time humidity value X in the battery compartment.

[0018] Furthermore, in step (1), the vehicle control module simultaneously obtains the humidity values of the first humidity sensor and the second humidity sensor, and takes the maximum value of the two as the real-time humidity value X in the battery compartment.

[0019] Furthermore, in step (1), the vehicle air-using components and the battery compartment share an air pump. After the vehicle is powered on, the vehicle control module first judges whether the vehicle air-using components need to use the air pump. If so, the air pump is given priority to inflate the vehicle air-using components. After the inflation work is completed, the ventilation work of the battery compartment is started.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] 1. The battery compartment with an integrated top cover of the present invention is provided with an independent anti-condensation system. When the air humidity in the battery compartment is relatively high, dry air is regularly injected into the battery compartment through the air pump and the dryer, so that the moist air is discharged to the outside of the vehicle through the second one-way valve from the air outlet, thereby ensuring that the air in the battery compartment remains dry and preventing the condensation phenomenon when the temperature difference between the inside and outside of the compartment is relatively large, effectively overcoming the problems existing in the prior art.

[0022] 2. The control method of the anti-condensation system of the present invention introduces control parameters such as the pipeline humidity value, the real-time humidity value in the compartment, the working time of the air pump, the total number of ventilations, and the time interval between the previous and the current ventilations, thereby making the control method more reasonable, safe and intelligent, effectively optimizing the control process, and improving the reliability and stability of the control method. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is the overall structural block diagram of the present invention.

[0024] Figure 2 is the control flow schematic diagram of the present invention.

[0025] In the figure: 1. Battery compartment; 10. Battery module; 11. First one-way valve; 12. Second one-way valve; 20. Vehicle air-using components; 21. Air pump; 22. Dryer; 23. Vehicle control module; 24. First humidity sensor; 25. Second humidity sensor; 26. Third humidity sensor; 27. Three-way valve; 28. First solenoid valve; 29. Second solenoid valve. Specific embodiments

[0026] The specific embodiments of the present invention will be described below with reference to the accompanying drawings. To fully understand the present invention, many details are described below, but for those skilled in the art, the present invention can be implemented without these details.

[0027] Refer to Figure 1 , this embodiment discloses a dew condensation prevention system for the battery compartment of an integrated bus roof, including a battery compartment 1 integrally arranged on the bus roof. A number of battery modules 10 are arranged at intervals in the battery compartment 1; the battery compartment 1 is provided with an air inlet and an air outlet, and a first one-way valve 11 and a second one-way valve 12 are respectively provided at the air inlet and the air outlet. The dew condensation prevention system includes an air pump 21, a dryer 22 and a vehicle control module 23 arranged outside the battery compartment 1; the vehicle control module 23 is controllably connected to the air pump 21; the air pump 21 is sequentially connected to the dryer 22 and the first one-way valve 11 through a ventilation circuit. The present invention provides an independent dew condensation prevention system for the battery compartment of the integrated roof. When the air humidity in the battery compartment 1 is relatively high, dry air is regularly injected into the battery compartment 1 through the air pump 21 and the dryer 22, so that the moist air is discharged to the outside of the vehicle through the second one-way valve 12 at the air outlet, thereby ensuring that the air in the battery compartment 1 remains dry and preventing dew condensation when the temperature difference between the inside and outside of the compartment is large, thus overcoming the problems existing in the prior art.

[0028] Refer to Figure 1, the anti-condensation system further includes a first humidity sensor 24, a second humidity sensor 25, and a third humidity sensor 26 that are controlled and connected to the vehicle control module 23; the first humidity sensor 24 is disposed beside the air inlet in the battery compartment 1; the second humidity sensor 25 is disposed beside the air outlet in the battery compartment 1; the third humidity sensor 26 is disposed between the dryer 22 and the first one-way valve 11. In this embodiment, the first humidity sensor 24 and the second humidity sensor 25 are used to simultaneously detect the air humidity in the battery compartment 1. When judging the real-time humidity value X in the compartment, the maximum value of the two is used as the judgment criterion, thereby ensuring that the air humidity in each area of the battery compartment 1 meets the safety requirements. The third humidity sensor 26 is used to detect the humidity value of the pipeline, thereby detecting whether the drying performance of the dryer 22 is normal, so as to prevent the abnormal ventilation effect of the battery compartment 1 caused by the failure of the dryer 22. Preferably, in this embodiment, the dryer 22 includes a container and a desiccant installed in the container. When the abnormal drying performance is detected, the desiccant can be replaced to quickly handle it, thereby improving work efficiency.

[0029] Referring to Figure 1 , preferably, the air pump 21 in this embodiment is an existing air pump disposed on the bus chassis for inflating vehicle air components 20 such as the vehicle airbag and the door of the whole vehicle. Thus, the existing components of the whole vehicle can be fully utilized, and the space and production cost of the whole vehicle can be saved. Based on this, the anti-condensation system further includes a three-way valve 27 and the vehicle air component 20. The three interfaces of the three-way valve 27 are respectively connected to the air pump 21, the dryer 22, and the vehicle air component 20, and the three-way valve 27 is controlled and connected to the vehicle control module 23. When the vehicle is running, the air pump 21 preferentially inflates the vehicle air components 20 such as the vehicle airbag or the door of the whole vehicle, and ventilates the battery compartment 1 through the ventilation circuit during the idle time. Of course, in other embodiments, if the cost or layout space requirements are not considered, an air pump dedicated for ventilation can also be separately provided outside the battery compartment 1 on the bus roof, thereby optimizing the control program to ensure that the ventilation of the battery compartment and the inflation of the vehicle air components do not interfere with each other.

[0030] Referring to Figure 1 , the anti-condensation system further includes a first solenoid valve 28 and a second solenoid valve 29 that are controlled and connected to the vehicle control module 23. The first solenoid valve 28 is disposed between the vehicle air component 20 and the three-way valve 27, and the second solenoid valve 29 is disposed between the three-way valve 27 and the dryer 22. The vehicle control module 23 controls the opening and closing states of the first solenoid valve 28 and the second solenoid valve 29, thereby controlling the on or off states of the ventilation circuit and the vehicle inflation circuit, and thus realizing intelligent control.

[0031] Referring to Figure 1 and Figure 2 , in order to more clearly introduce the above anti-condensation system, the following details the specific control method of this embodiment, which includes the following control steps:

[0032] After the vehicle is powered on, if the vehicle control module 23 detects that the real-time humidity value X in the battery compartment 1 exceeds the preset humidity value X1, the second solenoid valve 29 and the air pump 21 are turned on, and thus the air exchange process for the battery compartment 1 is started;

[0033] The vehicle control module 23 adds the current air exchange to the total air exchange times Z, simultaneously times the working time of the air pump 21, and continuously monitors the real-time humidity value X in the battery compartment 1;

[0034] Within the preset time Y2, if the real-time humidity value X in the battery compartment 1 does not exceed the preset humidity value X1, the air exchange is stopped, and the recorded total air exchange times Z are cleared;

[0035] If the preset time Y2 is exceeded and the real-time humidity value X in the battery compartment 1 still exceeds the preset humidity value X1, the vehicle control module 23 determines whether the recorded total air exchange times Z exceed the preset times Z1. If the preset times Z1 are exceeded, the current air exchange is stopped, and a fault alarm is issued to remind the user to detect the sealing and insulation conditions of the battery compartment 1; if the preset times Z1 are not exceeded, the current air exchange is stopped, and the above steps are repeated after the next power-on, and so on in a cycle.

[0036] Refer to Figure 1 and Figure 2 , specifically, the setting of the preset time Y2 is mainly considered that the space in the battery compartment 1 is large, while the volume of the air pump 21 is limited, and the moist air in the battery compartment 1 cannot be completely replaced at one time. Therefore, in order to avoid damage caused by the long-term operation of the air pump 21, it is necessary to set the single working time Y2 and complete the air exchange work in multiple times, thereby fully protecting the air pump 21. In order to clearly record the air exchange situation of the battery compartment 1, each air exchange is accumulated into the total air exchange times Z. After multiple air exchanges, when the real-time humidity value X in the battery compartment 1 meets the ideal humidity requirement, the total air exchange times Z are cleared. However, when the total air exchange times Z exceed the preset times Z1 and the real-time humidity value X in the battery compartment 1 still does not meet the ideal humidity requirement, it indicates that there may be a problem with the sealing and insulation performance of the battery compartment 1, and it is necessary to immediately conduct detection and treatment. The setting of the preset times Z1 can be comprehensively considered according to factors such as the air injection volume of the air pump 21, the volume of the battery compartment 1, and the allowable air exchange time.

[0037] Refer to Figure 1 and Figure 2, specifically, the vehicle control module 23 records the ventilation time of each ventilation at the end of each ventilation; in step (4), if the total number of ventilations Z does not exceed the preset number Z1, it is determined whether the time interval between the previous ventilation and the current ventilation exceeds the preset time interval Y3. If it exceeds the preset time interval Y3, the recorded total number of ventilations Z is cleared; if it does not exceed the preset time interval Y3, the recorded total number of ventilations Z is not cleared. The setting of the time interval Y3 mainly takes into account that if the vehicle has been parked for a long time without starting, the humidity in the battery compartment 1 will increase, and the ventilation effects accumulated previously may be affected. Therefore, if the time interval between two consecutive ventilations exceeds Y3, the total number of ventilations Z is cleared to start a new round of ventilation accumulation when the vehicle is powered on next time.

[0038] Refer to Figure 1 and Figure 2 , specifically, in step (2), when the working time of the air pump 21 exceeds the preset time Y1, the vehicle control module 23 first determines whether the humidity value of the third humidity sensor 26 exceeds the preset humidity value X2. If it exceeds the preset humidity value X2, the vehicle instrument is used to remind of the abnormal dryer and the ventilation is stopped; if it does not exceed the preset humidity value X2, within the time period of Y1 - Y2, the vehicle control module 23 continuously monitors the real-time humidity value X in the battery compartment 1. When the pipeline humidity value exceeds the preset humidity value X2, it indicates that the dryer is abnormal and needs to be repaired. The dryer in this embodiment uses a conventional desiccant, so only the desiccant needs to be replaced. The preset time Y1 is set to ensure that the air pump 21 has been working continuously for a period of time to avoid misjudgment when determining the pipeline humidity value X2. In this embodiment, the value of Y1 is preferably 1 - 3 min.

[0039] Refer to Figure 1 and Figure 2 , specifically, in step (1), the vehicle control module 23 simultaneously obtains the humidity values of the first humidity sensor 24 and the second humidity sensor 25, and takes the maximum value of the two as the real-time humidity value X in the battery compartment 1, thereby ensuring that the air humidity in each area of the battery compartment 1 meets the safety requirements.

[0040] Refer to Figure 1 and Figure 2 , specifically, in step (1), the vehicle air-using component 20 and the battery compartment 1 share an air pump. After the vehicle is powered on, the vehicle control module 23 first determines whether the vehicle air-using component 20 needs to use the air pump 21. If so, the air pump 21 is used to inflate the vehicle air-using component 20 first. After the inflation work is completed, the ventilation work of the battery compartment 1 is started.

[0041] Refer to Figure 2 , the following describes the specific working process of the above anti-condensation system:

[0042] Step S1: Start. The vehicle is powered on for self-check. Determine whether vehicle air-consuming components such as vehicle airbags or doors, etc., 20 need to be inflated. If inflation is required, execute Step S2; if inflation is not required, execute Step S4.

[0043] Step S2: The vehicle control module 23 turns on the first solenoid valve 28, thereby controlling the conduction of the vehicle inflation circuit and controlling the air pump 21 to start working.

[0044] Step S3: After inflation is completed, the vehicle control module 23 turns off the air pump 21 and the first solenoid valve 28, thereby controlling the closing of the vehicle inflation circuit.

[0045] Step S4: The vehicle control module 23 obtains the real-time humidity value X in the battery compartment 1, and determines whether the real-time humidity value X exceeds the preset humidity value X1. If it does not exceed, execute Step S10; if it exceeds, execute Step S5.

[0046] Step S5: The vehicle control module 23 turns on the second solenoid valve 29, thereby controlling the conduction of the ventilation circuit and controlling the air pump 21 to work; at the same time, the vehicle control module 23 records this ventilation into the total battery ventilation times Z and times the working time of the air pump 21.

[0047] Step S6: When the working time of the air pump 21 exceeds the preset time Y1, the vehicle control module 23 determines whether the working time of the air pump 21 exceeds the preset time Y2. If it does not exceed Y2, execute Step S7; if it exceeds Y2, execute Step S11.

[0048] Step S7: The vehicle control module 23 determines whether the humidity value of the third humidity sensor 26 exceeds the preset humidity value X2. If it does not exceed X2, execute Step S8; if it exceeds X2, display replacing the desiccant through the vehicle instrument and execute Step S9;

[0049] Step S8: The vehicle control module 23 determines whether the real-time humidity value X in the battery compartment 1 is less than the preset humidity value X1. If it does not exceed, repeat Step S6; if it exceeds, execute Step S9.

[0050] Step S9: The vehicle control module 23 controls the air pump 21 and the second solenoid valve 29 to close, thereby controlling the closing of the ventilation circuit.

[0051] Step S10: The vehicle control module 23 clears the total recorded ventilation times Z, records this ventilation time, and ends the control process.

[0052] Step S11: The vehicle control module 23 determines whether the total recorded battery ventilation times Z exceed the preset times Z1. If it does not exceed, execute Step S12; if it exceeds, execute Step S13.

[0053] Step S12: The vehicle control module 23 determines whether the time interval between the previous air change and the current air change exceeds the preset time interval Y3. If it exceeds, step S9 is executed; if not, step S14 is executed.

[0054] Step S13: The vehicle control module 23 gives a fault alarm, prompting to detect the sealing and insulation condition of the battery compartment 1.

[0055] Step S14: The vehicle control module 23 turns off the air pump 21 and the second solenoid valve 29, thereby controlling the air change circuit to close. At the same time, the current air change time is recorded, and the control process ends.

[0056] The above is only the specific implementation manner of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantive modification made to the present invention using this concept shall fall within the scope of infringement of the protection scope of the present invention.

Claims

1. Control method for anti-condensation system of battery compartment of integrated bus roof, characterized in that: It includes a battery compartment integrally arranged on the bus roof, and a number of battery modules are arranged at intervals in the battery compartment; the battery compartment is provided with an air inlet and an air outlet, and a first one-way valve and a second one-way valve are respectively provided at the air inlet and the air outlet; The anti-condensation system includes an air pump, a dryer and a vehicle control module arranged outside the battery compartment; the vehicle control module is controllably connected to the air pump; the air pump is sequentially connected to the dryer and the first one-way valve through a ventilation circuit; it also includes a first humidity sensor, a second humidity sensor and a third humidity sensor controllably connected to the vehicle control module; the first humidity sensor is arranged beside the air inlet in the battery compartment; the second humidity sensor is arranged beside the air outlet in the battery compartment; the third humidity sensor is arranged between the dryer and the first one-way valve; the air pump is arranged on the bus chassis; The anti-condensation system also includes a three-way valve and vehicle-use air components; the three interfaces of the three-way valve are respectively connected to the air pump, the dryer and the vehicle-use air components, and the three-way valve is controllably connected to the vehicle control module; it also includes a first solenoid valve and a second solenoid valve controllably connected to the vehicle control module, the first solenoid valve is arranged between the vehicle-use air components and the three-way valve, and the second solenoid valve is arranged between the three-way valve and the dryer; The control method for the anti-condensation system of the battery compartment includes the following steps: (1) After the vehicle is powered on, if the vehicle control module detects that the real-time humidity value X in the battery compartment exceeds the preset humidity value X1, the second solenoid valve and the air pump are turned on, so as to start the ventilation process for the battery compartment; (2) The vehicle control module accumulates the current ventilation to the total ventilation times Z, and at the same time times the working time of the air pump, and continuously monitors the real-time humidity value X in the battery compartment; (3) Within the preset time Y2, if the real-time humidity value X in the battery compartment does not exceed the preset humidity value X1, the ventilation is stopped, and the recorded total ventilation times Z are cleared; (4) If the preset time Y2 is exceeded and the real-time humidity value X in the battery compartment still exceeds the preset humidity value X1, the vehicle control module judges whether the recorded total ventilation times Z exceed the preset times Z1. If it exceeds the preset times Z1, the current ventilation is stopped and a fault alarm is issued to remind the user to detect the sealing and insulation conditions of the battery compartment; if it does not exceed the preset times Z1, the current ventilation is stopped, and the above steps are repeated after the next power-on, and so on in a cycle; the vehicle control module records the ventilation time of each ventilation at the end of each ventilation; in step (4), if the total ventilation times Z do not exceed the preset times Z1, it is judged whether the time interval between the previous ventilation and the current ventilation exceeds the preset time interval Y3. If it exceeds the preset time interval Y3, the recorded total ventilation times Z are cleared; if it does not exceed the preset time interval Y3, the recorded total ventilation times Z are not cleared.

2. The control method of the anti-condensation system for the battery compartment of an integrated bus roof cover according to claim 1, characterized in that: In step (2), when the working time of the air pump exceeds the preset time Y1, the vehicle control module first determines whether the humidity value of the third humidity sensor exceeds the preset humidity value X2. If it exceeds the preset humidity value X2, the vehicle instrument is used to remind of the abnormal dryer and the ventilation is stopped; if it does not exceed the preset humidity value X2, within the time period of Y1 - Y2, the vehicle control module continuously monitors the real-time humidity value X in the battery compartment.

3. The control method of the anti-condensation system for the battery compartment of an integrated bus roof cover according to claim 1, characterized in that: In step (1), the vehicle control module simultaneously obtains the humidity values of the first humidity sensor and the second humidity sensor, and takes the maximum value of the two as the real-time humidity value X in the battery compartment.

4. The control method of the anti-condensation system for the battery compartment of an integrated bus roof cover according to claim 1, characterized in that: In step (1), the pneumatic components of the vehicle and the battery compartment share an air pump. After the vehicle is powered on, the vehicle control module first determines whether the pneumatic components of the vehicle need to use the air pump. If so, the air pump is used to inflate the pneumatic components of the vehicle first. After the inflation work is completed, the ventilation work of the battery compartment is then started.

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