An overhead battery installation structure for a rail vehicle and a rail vehicle

Abstract

The present invention relates to a battery installation structure for rail transit vehicles, in particular to an overhead battery installation structure for rail vehicles and a rail vehicle, which comprises a vehicle body. An air-conditioning duct (9) is installed inside the top cover of the vehicle body. A sunken cavity (2) is provided on the top cover of the vehicle body. A battery box (1) is arranged in the sunken cavity. An air inlet communicating with the sunken cavity is provided on the side wall of the sunken cavity. The air inlet is connected to the air-conditioning duct through a fire damper (8). When the vehicle is not activated, the fire damper is in a closed state. Only after the vehicle is activated and passes the self-check procedure, the fire damper is normally opened. The present invention can make up for the shortage of equipment installation space of the vehicle and avoid the risk of thermal runaway during the operation of the battery.

Description

Technical Field

[0001] The present invention relates to a battery box for rail transit vehicles, in particular to an overhead battery installation structure for rail vehicles and a rail vehicle. Background Art

[0002] With the rapid development of hybrid power technology, energy storage devices (super capacitors, lithium batteries, diesel generator sets) have currently been added to rail vehicles to meet the needs of various transportation environments. Generally, these devices are configured on the vehicle underframe. However, there are usually devices such as traction inverters, power packs, and braking resistors configured on the vehicle underframe. The power pack itself has a large mass and occupies a large amount of space under the vehicle underframe, resulting in limited space on the vehicle underframe and being unable to meet the installation of these devices. In addition, the vehicle interior is mainly for installing control devices and passenger information systems. Arranging the battery box inside the vehicle will occupy a large amount of passenger space and cannot meet the relevant standard requirements for fire safety.

[0003] The roof layout of existing rail vehicles mainly consists of current collection devices (if any) and air-conditioning units. The remaining space in the vehicle running direction is not used. Therefore, it is possible to consider overhead installation of auxiliary devices with relatively small mass such as batteries to relieve the bottom space of hybrid vehicles.

[0004] However, for rail transit vehicles (multiple units, maglev vehicles) on elevated lines, the overhead battery box or equipment box works under the high temperature of solar radiation for a long time, which will not only affect the service life of on-vehicle devices or batteries, but more seriously, the battery will experience thermal runaway and pose risks such as fire. Summary of the Invention

[0005] The technical problem to be solved by the present invention is, aiming at the problem that the space of existing rail vehicles is limited and the battery box cannot be arranged, the present invention provides an overhead battery installation structure for rail vehicles and a rail vehicle.

[0006] To solve the above technical problem, the present invention adopts the following technical solutions:

[0007] An overhead battery installation structure for rail vehicles, including a vehicle body. An air-conditioning air duct is installed inside the top cover of the vehicle body. A sunken cavity is provided on the top cover of the vehicle body. A battery box is arranged in the sunken cavity. An air inlet communicating with the sunken cavity is provided on the side wall of the sunken cavity. At the same time, the air inlet is connected to the air-conditioning air duct through a fire damper. When the vehicle is not activated, the fire damper is in a closed state. Only when the vehicle is activated and passes the self-check program, the fire damper opens normally.

[0008] The present invention provides a sunken cavity on the top cover of the car body of a rail vehicle, and a battery box is arranged in the sunken cavity. By providing an air inlet on the side wall of the sunken cavity that communicates with the air-conditioning duct, not only is the top-mounted storage of the battery box realized, but also the vehicle gauge is not affected, and the risk of thermal runaway during the operation of the battery can be avoided.

[0009] Preferably, a temperature-sensing cable and a temperature sensor are arranged inside the box body of the battery box, and the signal output ends of the temperature-sensing cable and the temperature sensor are connected to the train control and management system. In this way, the temperature of the battery box is sensed by both the temperature-sensing cable and the temperature sensor and is connected to the train control and management system TCMS, so that the activation of the battery box can be automatically controlled to avoid safety accidents caused by high temperature of the battery.

[0010] Preferably, the temperature-sensing cable is mainly laid at the battery pack body and the electrical connection copper busbar to detect the temperature change of the battery box in the first time.

[0011] Preferably, the temperature-sensing cable is laid in an S-shaped path on the upper part of the battery pack body so that the temperature-sensing cable can fully cover the battery pack.

[0012] Preferably, one end of an air duct is connected to the side of the air inlet near the battery box, and the other end of the air duct is connected to the battery box to ensure the ventilation and cooling inside the battery box.

[0013] Preferably, battery box mounting seats are arranged on both sides of the sunken cavity, and an installation C-shaped groove is arranged on the upper part of the battery box mounting seat, and the lower part is the longitudinal beam of the vehicle side wall.

[0014] Preferably, drain holes are reserved on both sides of the bottom of the sunken cavity, and there is an installation gap between the bottom surface of the battery box and the bottom surface of the sunken cavity to ensure the drainage of the sunken cavity.

[0015] Preferably, an air inlet grille is arranged on the side of the battery box, and an air outlet grille is arranged on the top surface, and the air outlet grille is far away from the air inlet grille.

[0016] Based on the same inventive concept, the present invention also provides a battery box ventilation and fire prevention method for the top-mounted battery installation structure of the rail vehicle, which includes:

[0017] When the detected temperature T1 of the temperature-sensing cable < 120 °C and the detected temperature T2 of the temperature sensor < 45 °C after the train is activated, the on-vehicle charger normally charges the battery pack, the train control and management system outputs an enable signal = 1, the fire damper is powered on and in an activated state, and continuously opens, and the air-conditioning air passes through the battery box, that is, the ventilation and cooling mode is turned on;

[0018] When the detected temperature T1 of the temperature sensing cable < 120°C and the detected temperature T2 of the temperature sensor ≥ 45°C after the train is activated, the on-board charger floats the battery pack, and at the same time the train control and management system outputs an enable signal = 1, the fire damper is activated and continuously opened, and air conditioning air is passed through the battery box, that is, the ventilation and cooling mode is turned on;

[0019] When the detected temperature T1 of the temperature sensing cable ≥ 120°C and the detected temperature T2 of the temperature sensor is abnormally high or there is no signal, that is, when a fire breaks out, the train control and management system outputs an enable signal = 0, the fire damper closes, and ventilation into the battery box stops to prevent the spread of fire. At the same time, an alarm signal is input to the driver's display HMI, and the driver takes emergency measures to travel to the next station or wait for emergency rescue.

[0020] Based on the same inventive concept, the present invention also provides a rail vehicle, which includes the above-mentioned overhead battery installation structure for rail vehicles. Compared with the prior art, the present invention has the following advantages:

[0021] a), The present invention solves the problem of insufficient layout space for underframe equipment of rail vehicles. At the same time, by connecting the air duct of the vehicle air conditioner, the integrated cooling of overhead equipment is realized, the high temperature impact caused by solar radiation on elevated lines is solved, and the thermal runaway of the battery is avoided.

[0022] b), The present invention arranges a temperature sensing cable and a temperature sensor inside the box body of the battery box, and the signal output ends of the temperature sensing cable and the temperature sensor are connected to the train control and management system, so as to realize the ventilation and fire prevention control strategy for the overhead battery box by using the train control and management system, and prevent the spread of fire caused by the ventilation of the battery box. This ventilation and fire prevention control strategy meets the European fire protection standard of EN45545, and finally realizes the lightweight technology improvement of the energy storage hybrid rail vehicle.

[0023] c), The present invention can be widely applied to rail vehicles such as urban rail vehicles, EMUs, and maglev vehicles, and has good application effects. Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

[0025] Figure 1 Schematic diagram of the installation structure of the overhead battery box for the rail vehicle of the present invention (state where the battery box is separated from the vehicle);

[0026] Figure 2 Side view schematic diagram of the installation structure of the overhead battery box for rail transit vehicles of the present invention;

[0027] Figure 3 is Figure 2 the enlarged view at position I in

[0028] Figure 4 Detail height schematic diagram of the installation structure of the overhead battery box for rail transit vehicles of the present invention;

[0029] Figure 5 Inlet and outlet air layout diagram inside the battery box of the present invention;

[0030] Figure 6 Schematic diagram of the laying of the temperature-sensitive cable in the battery box of the present invention;

[0031] Figure 7 is the ventilation and fire prevention logic diagram of the battery box. Specific embodiments

[0032] The present invention will be further described below in conjunction with specific preferred embodiments, but the protection scope of the present invention is not limited thereby.

[0033] For the convenience of description, the relative position relationships of the components, such as: up, down, left, right, etc., are all described according to the layout direction of the drawings in the specification, and do not limit the structure of this patent.

[0034] Please refer to Figure 1 - Figure 7 , an embodiment of the installation structure of the overhead battery box for the rail vehicle of the present invention includes a vehicle body, an air-conditioning duct 9 is installed inside the top cover 10 of the vehicle body, and a sunken cavity 2 is provided on the top cover 10 of the vehicle body.

[0035] The battery box 1 is accommodated in the sunken cavity 2, and the top of the battery box 1 is flush with the roof cover, ensuring that the top of the battery box 1 does not exceed the boundary. The specific installation method of the battery box 1 is as follows: Battery box mounting seats 3 are welded and provided on both sides of the sunken cavity 2; an installation C-shaped groove 4 is welded and provided on the upper part of the battery box mounting seat 3, and the mounting base of the battery box 1 is installed on the C-shaped groove 4 through T-shaped bolts to ensure that the installation of the battery box 1 has an adjustment amount; the lower part of the battery box mounting seat 3 is the longitudinal beam of the vehicle side wall, so as to utilize the longitudinal beam of the vehicle side wall as the bearing longitudinal beam of the battery box 1.

[0036] Part of the heat generated in the sinking cavity 2 comes from the heat generated during the charging and discharging process of the battery pack, and the other part directly comes from solar radiation. The heat generated by solar radiation is the main reason for the continuous increase in the temperature inside the sinking cavity 2. Therefore, in addition to adding heat-insulating materials to the vehicle top cover 10 for protection, the present invention needs to adopt forced ventilation measures for the sinking cavity 2 to meet the normal working temperature requirements of the battery pack. As Figure 2 , Figure 3 , Figure 5 shown, the air-conditioning duct 9 is installed at the lower part of the vehicle top cover 10 and runs through the entire vehicle. An air inlet communicating with the sinking cavity 2 is provided on the end face 5 of the sinking cavity 2 near the air-conditioning duct, and the end of the air inlet far from the battery box is connected to the air-conditioning duct 9 through a fire damper 8. At the same time, an air inlet grille 102 is provided on the side surface of the battery box 1, and an air outlet grille 101 is provided on the top surface, and the air outlet grille 101 is arranged away from the air inlet grille 102. The end of the air inlet near the battery box is connected to one end of an air duct 6, and the other end of the air duct 6 is connected to the air inlet grille 102 to ensure the cooling ventilation of the battery box 1. The air duct 6 is preferably a flexible air duct. When the vehicle is not activated, the fire damper 8 is in a closed state. Only when the vehicle is activated and passes the self-check program, the fire damper 8 is normally opened, and cold air is sent into the interior of the battery box 1 through the air duct 6.

[0037] The air inlet grille 102 is welded to the side panel of the battery box 1 and forms an angle of 35° with the side panel (this angle is a reference value, and the purpose is to ensure that the air outlet direction of the air inlet grille 102 is not blocked by the battery pack). The air outlet grilles 101 are evenly distributed on both sides of the top cover of the battery box 1 and are arranged away from the air inlet grille 102 to ensure that the air flow path covers the entire top of the battery pack and discharges the heat out of the battery box 1 in time.

[0038] As Figure 7 shown in the fire protection and ventilation control logic diagram, dual signals of a temperature sensor 105 and a temperature sensing cable 104 are input into the TCMS (train control and management system in the cab) for logic control. The specific logic control method is as follows:

[0039] When the detected temperature T1 of the temperature sensing cable < 120 °C and the detected temperature T2 of the temperature sensor < 45 °C after the train is activated, the on-vehicle charger normally charges the battery pack, the train control and management system outputs an enable signal = 1, the fire damper is powered on and in an activated state, and remains open continuously, and air-conditioning air is passed through the battery box, that is, the ventilation cooling mode is turned on (the train control and management system collects the T1 signal through the temperature sensing cable 104 and the T2 signal through the temperature sensor 105, and the entire signal sampling period can be controlled to be adjustable through a program);

[0040] When the detected temperature T1 of the temperature-sensing cable < 120°C and the detected temperature T2 of the temperature sensor ≥ 45°C after the train is activated, the on-vehicle charger conducts floating charging for the battery pack. Meanwhile, the train control and management system outputs an enable signal = 1, the fire damper is in an activated state and remains open continuously, and air-conditioning air is introduced into the battery box, that is, the ventilation and cooling mode is turned on.

[0041] When the detected temperature T1 of the temperature-sensing cable ≥ 120°C and the detected temperature T2 of the temperature sensor is abnormally high or there is no signal, that is, when a fire breaks out, the train control and management system outputs an enable signal = 0, the fire damper closes, the ventilation into the battery box stops to prevent the spread of the fire. Meanwhile, an alarm signal is input to the driver display HMI, and the driver takes emergency measures to travel to the next station or wait for emergency rescue.

[0042] To meet the fire protection standard requirements of EN45545, the fire resistance of the structure of the battery box 1 is the key to ensuring its own fire protection. As Figure 6 shown, the present invention arranges a temperature-sensing cable 104 and a temperature sensor 105 inside the box body of the battery box 1, and the signal output ends of the temperature-sensing cable 104 and the temperature sensor 105 are connected to the train control and management system (TCMS). In this way, through the double-signal confirmation of the temperature-sensing cable 104 and the temperature sensor 105 by the train control and management system (TCMS), once a fire occurs inside the battery box 1, the injection of fresh air into the battery box 1 can be avoided. During specific arrangement, the temperature-sensing cable 104 is mainly laid near the battery pack body and the electrical connection copper busbar, and is wound around the upper part of the battery pack body in an S-shaped path to ensure that the temperature-sensing cable 104 covers as much as possible the upper part of the battery pack.

[0043] As Figure 1 shown, drain holes 7 are reserved on both sides of the bottom of the sunken cavity 2 to ensure that the rainwater inside the sunken cavity 2 can be quickly drained when it rains. There is an installation gap between the bottom surface of the battery box 1 and the bottom surface of the sunken cavity 2. As Figure 4 shown, the distance from the installation base mounting surface of the battery box 1 to the bottom surface of the battery box 1 is H1, and the distance to the bottom surface of the sunken cavity 2 is H2, and H2 - H1 ≥ 10 mm, so that a 10-mm installation gap is reserved between the bottom surface of the battery box 1 and the bottom surface of the sunken cavity 2. The purpose of reserving this installation gap is on the one hand to prevent the bottom of the battery box 1 from blocking the drain holes 7, which is not conducive to the drainage of rainwater, and on the other hand to ensure the reliable connection of the installation base of the battery box 1 and the battery box mounting seat 3 provided in the sunken cavity 2 through bolts.

[0044] As described above, it is only the specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can make many possible changes and modifications to the technical solution of the present invention by using the technical content disclosed above, or modify it into an equivalent embodiment with equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. An overhead battery installation structure for a rail vehicle, including a car body, wherein an air-conditioning duct (9) is installed inside the top cover of the car body, and it is characterized in that: A sunken cavity (2) is arranged on the top cover of the car body, a battery box (1) is arranged in the sunken cavity, a temperature sensing cable (104) and a temperature sensor (105) are arranged inside the box body of the battery box, the signal output ends of the temperature sensing cable and the temperature sensor are connected to the train control and management system, and an air inlet communicating with the sunken cavity is arranged on the side wall of the sunken cavity, and the air inlet is connected to the air-conditioning duct through a fire damper (8). When the vehicle is not activated, the fire damper is in a closed state, and only when the vehicle is activated and passes the self-check program, the fire damper opens normally.

2. The overhead battery mounting structure for rail vehicles according to claim 1, wherein The temperature sensing cable is mainly laid at the battery pack body and the electrical connection copper busbar.

3. The overhead battery installation structure for a rail vehicle according to claim 2, characterized in that, The temperature sensing cable is laid in an S-shaped path on the upper part of the battery pack body.

4. The overhead battery mounting structure for rail vehicles according to claim 1, wherein, One end of an air duct (6) is connected to the side of the air inlet near the battery box, and the other end of the air duct is connected to the battery box.

5. The overhead battery mounting structure for a rail vehicle according to claim 1, characterized in that, Battery box mounting seats are arranged on both sides of the sunken cavity, and an installation C-shaped groove (4) is arranged on the upper part of the battery box mounting seat, and the lower part is the longitudinal beam of the vehicle side wall.

6. The overhead battery installation structure for a rail vehicle according to claim 1, characterized in that, Drain holes (7) are reserved on both sides of the bottom of the sunken cavity (2), and there is an installation gap between the bottom surface of the battery box and the bottom surface of the sunken cavity.

7. The overhead battery mounting structure for a rail vehicle according to claim 4, characterized in that, An air inlet grille (102) is arranged on the side surface of the battery box, and an air outlet grille (101) is arranged on the top surface, and the air outlet grille is far away from the air inlet grille.

8. A ventilation and fire prevention method for the battery box of the overhead battery installation structure for a rail vehicle according to any one of claims 2-7, characterized in that: When the detected temperature T1 of the temperature sensing cable < 120 °C and the detected temperature T2 of the temperature sensor < 45 °C after the train is activated, the on-vehicle charger normally charges the battery pack, the train control and management system outputs an enable signal = 1, the fire damper is powered on and in an activated state, and continuously opens, and the battery box is ventilated with air-conditioning air, that is, the ventilation and cooling mode is turned on; When the detected temperature T1 of the temperature sensing cable < 120 °C and the detected temperature T2 of the temperature sensor ≥ 45 °C after the train is activated, the on-vehicle charger performs floating charge on the battery pack, and at the same time the train control and management system outputs an enable signal = 1, the fire damper is in an activated state, and continuously opens, and the battery box is ventilated with air-conditioning air, that is, the ventilation and cooling mode is turned on; When the detected temperature T1 of the temperature sensing cable ≥ 120 °C and the detected temperature T2 of the temperature sensor is abnormally high or there is no signal, that is, when a fire occurs, the train control and management system outputs an enable signal = 0, the fire damper closes, stops ventilating the battery box, avoids the spread of fire, and at the same time an alarm signal is input to the driver display screen HMI, and the driver takes emergency measures to travel to the next station or wait for emergency rescue.

9. An orbital vehicle, characterized in that Including the overhead battery installation structure for a rail vehicle according to any one of claims 1-8.

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