CN209880695U - Power battery box of gas-electricity hybrid power bus - Google Patents
Power battery box of gas-electricity hybrid power bus Download PDFInfo
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- CN209880695U CN209880695U CN201920809539.XU CN201920809539U CN209880695U CN 209880695 U CN209880695 U CN 209880695U CN 201920809539 U CN201920809539 U CN 201920809539U CN 209880695 U CN209880695 U CN 209880695U
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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 discloses a power battery box of a gas-electric hybrid power bus, which comprises a box body, an air inlet and an air outlet, wherein an air outlet fan is arranged at the air outlet; the battery box comprises a box body, a plurality of battery monomers, an air inlet channel, an air outlet channel, an air inlet, an air outlet, an air inlet channel, an air outlet channel and a plurality of air outlets, wherein the plurality of battery monomers are arranged in the box body, gaps between two sides inside the box body and two sides of the battery monomers form the air inlet channel and the air outlet channel respectively; gaps among the plurality of battery monomers in the box body form a transition air duct; along the flowing direction of air at air inlet channel, air inlet channel's clearance dwindles gradually, along the flowing direction of air at air outlet channel, air outlet channel's clearance dwindles gradually. The utility model discloses a gas-electricity hybrid power passenger train's power battery box's radiating effect is good to can reduce the difference in temperature between each battery monomer.
Description
Technical Field
The utility model relates to a passenger train battery equipment, concretely relates to power battery box of gas-electricity hybrid power passenger train.
Background
The gas-electric hybrid power bus uses natural gas or liquefied petroleum gas as engine energy source, and matches with motor to drive vehicle together, and several domestic cities are already in use, and it has good endurance mileage and higher gas-saving rate, so that it is the preferential choice of urban bus.
Because the battery of the passenger car is frequently charged and discharged, the battery generates a large amount of heat due to the intense electrochemical action in the battery, so that the battery of the passenger car is overheated occasionally, and the overheating of the battery can seriously restrict the improvement of the power performance and the energy saving rate of the battery; more importantly, when the heat cannot be transmitted in time, the charge retention capacity and the charge and discharge performance of the battery are reduced, the service life of the battery is shortened, meanwhile, the heat cannot be distributed in time, the heat is easy to accumulate in a battery box, and the engine deflagration can be caused by overhigh working temperature. Therefore, the method is particularly important for reducing the heat in the battery box and reducing the temperature of the battery monomer; in addition, the temperature difference between the battery cells is limited, because according to related researches, when the temperature difference between the battery cells is higher than 6 ℃, the battery management system can give an alarm to influence the normal running of the passenger car.
Therefore, a heat dissipation system is generally arranged in a battery box in a battery compartment at the rear part of the gas-electric hybrid power bus to perform heat dissipation treatment on the battery, so that the temperature of the battery is reduced. Referring to fig. 1-2, four battery boxes 6a are disposed in a general battery compartment, each battery box 6a is provided with a plurality of battery cells 1a arranged at equal intervals, two battery cells are generally disposed, an air outlet channel 4a is reserved between two battery cells 1a, an air inlet channel 3a is reserved between each battery cell 1a and the inner wall of the battery box 6a, an air inlet 2a is disposed in front of the air inlet channel 3a, an air outlet fan 5a is disposed behind the air outlet channel 4a, and a gap is formed between the battery cells 1 a. When the battery box is in work, under the suction action of the air outlet fan 5a, air outside the battery box 6a enters the battery box 6a from the air inlet 2a in front of the two air inlet channels 3a, flows to the air outlet channel 4a in the middle from gaps among the plurality of battery monomers 1a, is discharged out of the battery box 6a through the air outlet fan 5a, and is finally discharged to the outside through the exhaust fan at the rear part of the battery compartment, so that the heat dissipation of the battery is realized; the following problems still remain:
1. after the air enters the battery box 6a through the air inlet 2a, a large amount of air directly flows to the rear part of the battery box 6a, and then is directly discharged through the air outlet fan 5a, so that the heat generated by the battery monomer 1a in the battery box 6a cannot be sufficiently taken away, and the heat dissipation effect is poor.
2. When the air-out fan 5a works, the air-out fan 5a at the tail end of the air-out channel 4a generates negative pressure to drive air to enter from the air inlet 2a and flow to the air-out fan 5a, because the flow resistance of the two air inlet channels 3a is small, most of air directly flows from the two air inlet channels 3a to the battery monomer 1a near the air-out fan 5a and flows through the gap, and is discharged from the rear of the air-out channel 4a, and the flow resistance of the gap at the battery monomer 1a near the air inlet 2a is large, so only a small part of air flows through the gap and enters the air-out channel 4a, and the heat dissipation effect at the rear side of the battery box 6a is good, while the heat dissipation effect at the front side is poor, and further the difference of the heat dissipation effects of the battery monomers 1a at the front side.
In addition, referring to fig. 5, it can be found from the flow trace diagram of the air flowing inside the battery box 6a after reaching the stable state that the air passing through the air outlet duct 4a from the gaps between the first four battery cells a of the battery box 6a does not completely and directly flow along the outlet direction, but has a part of air flow flowing back, sinks to the bottom of the air outlet duct 4a in a vortex manner, and then flows to the outlet together with the air flow passing through the air outlet duct 4a from the gaps between the other battery cells behind, and is discharged by the air outlet fan 5 a; meanwhile, researches show that the air velocity sinking to the bottom of the air outlet channel 4a is very low (the velocity is less than 0.2m/s), close to stagnation and long in flowing distance, so that the air absorbing the heat of the battery monomer 1a cannot be taken out of the battery box 6a in time; on the other hand, the air flow rate near the air inlet 2a is low and tends to be static, so that the convection heat exchange effect of the single battery at the position can be reduced, and the heat dissipation effect is poor. And the air flow rate that is close to air outlet fan 5a department obviously compares in the air flow rate that is close to air intake 2a department fast, can in time take away the heat to the radiating effect that leads to the battery monomer 1a at battery box 6a both ends has very big difference, and then leads to the battery monomer 1a of the inside front and back side of battery box 6a to form too big difference in temperature, causes the warning of battery management system easily.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome prior art's is not enough, provides a power battery box of gas-electricity hybrid passenger train, and this battery box is good to the free radiating effect of battery to can reduce the difference in temperature between each battery monomer.
The purpose of the utility model is realized through the following technical scheme:
a power battery box of a gas-electricity hybrid power bus is characterized by comprising a box body, an air inlet and an air outlet, wherein an air outlet fan is arranged at the air outlet; the battery box comprises a box body, a plurality of battery monomers, an air inlet channel, an air outlet channel, an air inlet, an air outlet, an air inlet channel, an air outlet channel and a plurality of air outlets, wherein the plurality of battery monomers are arranged in the box body, gaps between two sides inside the box body and two sides of the battery monomers form the air inlet channel and the air outlet channel respectively; gaps among the plurality of battery monomers in the box body form a transition air duct; along the flowing direction of air at air inlet channel, air inlet channel's clearance dwindles gradually, along the flowing direction of air at air outlet channel, air outlet channel's clearance dwindles gradually.
The working principle of the power battery box of the gas-electric hybrid power bus is as follows:
during operation, the air outlet fan runs, air outside the box body enters the box body, moves to the rear end of the box body from front to back along the air inlet channel and moves to the rear end of the air outlet channel in a transition mode, meanwhile, partial air directly moves to the air outlet channel from the transition air channel between the battery monomers, and finally is discharged out of the box body under the action of the air outlet fan. Because along the flow direction of air, inlet air channel reduces gradually, because inlet air channel has the guide effect to the flow of air to the inlet air channel that reduces gradually makes the flow velocity of air faster and faster, especially the rear end of box has increased the flow velocity of the radiating air who keeps away from the inlet area promptly, is favorable to improving the free radiating effect of battery of the inside rear end of box. Meanwhile, the air outlet channel is gradually reduced along the flowing direction of air in the air outlet channel and forms reverse matching with the air inlet channel, so that the air pressure difference at two ends of the gap between the battery monomers is adjusted, the pressure difference at two sides of the inlet and the outlet of the gap between the battery monomers is ensured to be consistent, the heat dissipation effect of the battery monomers is consistent, and the temperature difference between the battery monomers is reduced.
The utility model discloses a preferred scheme, wherein, the middle part position of air-out passageway is equipped with the air outlet. Through the setting in air outlet, can in time discharge the hot-blast after the absorption heat that is located the inside rear end of box, avoid the heat to stop for a long time in the box, be favorable to reducing the temperature of whole battery box fast to simple structure, design benefit.
In a preferred scheme of the utility model, the end part of the box body is provided with an air inlet connecting part and an air outlet connecting part which are convex outwards; the air inlet connecting part is arranged at the tail end of the air inlet channel along the flowing direction of air in the air inlet channel; the air outlet connecting part is arranged at the front end of the air outlet channel along the flowing direction of air in the air outlet channel; the air inlet is arranged on the air inlet connecting portion, and the air outlet is arranged on the air outlet connecting portion. Through the setting of air inlet connecting portion and air inlet connecting portion, the setting of air intake and air-out fan of being convenient for.
According to the preferred scheme of the utility model, the air inlet is provided with the cooling fan, and through the arrangement of the cooling fan, the air outside the box body is sucked and enters the box body, so that the air flow rate in the box body is increased, especially the air flow rate of the front end part of the air inlet channel can be increased, and the air flow rate can be matched with the air flow rate of the tail end of the air outlet channel, the integral pressure difference in the box body is kept, the heat dissipation effect is improved, and the temperature difference between the battery monomers is reduced; in addition, the cooling fan can reduce the temperature of air when entering the box body, and the radiating effect is favorably improved.
The utility model discloses a preferred scheme, battery monomer in the box has two rows, and vertical range sets up.
Preferably, the air inlet and the air outlet are both arranged between the two rows of battery cells.
Compared with the prior art, the utility model following beneficial effect has:
1. the utility model discloses a gas-electricity hybrid power passenger train's power battery box's radiating effect is good to can reduce the difference in temperature between each battery monomer.
2. The utility model discloses set up into diminishing gradually with inlet air channel's clearance, have the guide effect to the flow of air to inlet air channel that the clearance reduces gradually makes the flow speed of air faster and faster, especially in the inside rear end of box, thereby has increased the flow speed of the radiating air who keeps away from the air intake region, is favorable to improving the free radiating effect of battery of the inside rear end of box.
3. Along the air at the flow direction of air-out passageway, the utility model discloses set up the clearance of air-out passageway into dwindling gradually, realize reverse the matching with inlet air channel's clearance size to the air pressure differential of each battery monomer both sides has been adjusted, and it is unanimous to guarantee every free radiating effect of battery, and then has reduced the difference in temperature between the battery monomer.
4. The air inlet and the air outlet fan are arranged at the same end part of the box body, and air pressure difference between the battery monomers can be kept consistent after the air inlet channel and the air outlet channel are matched with each other to change gaps, so that the battery monomers in the box body can be uniformly cooled, and the temperature difference is reduced. If set up air intake and air-out fan at the power battery box at box both ends, can lead to the air flow velocity that is close to the regional of air-out fan in the box fast, and the air flow velocity of the region of keeping away from the air-out fan is slow, and both ends form great air pressure differential in the box, can lead to the free radiating effect of battery inconsistent. Obviously, the utility model discloses with air intake and air-out fan setting at the same tip of box, with inlet air channel and air-out passageway cooperation, it is better to reduce the difference in temperature effect between the battery monomer.
Drawings
Fig. 1-2 are schematic structural diagrams of a power battery box of a gas-electric hybrid electric bus in the prior art, wherein fig. 1 is a front view, and fig. 2 is a side view.
Fig. 3-4 are graphs showing the effect of temperature detection on a power battery box of a gas-electric hybrid passenger car in the prior art, wherein fig. 3 is a schematic diagram of a steady-state temperature field (in degrees c) of a Z-axis central section in a box body, and fig. 4 is a schematic diagram of a steady-state core temperature (in degrees c) of a Z-axis central section battery in the box body.
Fig. 5 is a schematic diagram of a flow trajectory of air flowing inside a battery case in a prior art to reach a steady state.
Fig. 6-8 are schematic structural views of a power battery box of a gas-electric hybrid power bus according to the present invention, in which fig. 6 is a front view, fig. 7 is a left view, and fig. 8 is a top view.
Fig. 9-10 are diagrams illustrating the temperature detection effect of the power battery box of the gas-electric hybrid power bus according to the present invention, fig. 9 is a schematic diagram illustrating the steady-state temperature field (unit ℃) of the Z-axis central cross section in the box, and fig. 10 is a schematic diagram illustrating the steady-state core temperature (unit ℃) of the Z-axis central cross section battery in the box and the amplitude reduction of the steady-state core temperature relative to the battery box of the prior art.
Detailed Description
The present invention will be further described with reference to the following examples and drawings, but the embodiments of the present invention are not limited thereto.
Referring to fig. 6 to 8, the power battery box of the gas-electric hybrid electric bus of the embodiment includes a box body 9, an air inlet 3 and an air outlet 11, wherein an air outlet fan 5 is arranged at the air outlet 11; the battery units 1 are arranged in the box body 9, gaps between two sides of the interior of the box body 9 and two sides of the battery units 1 form an air inlet channel 4 and an air outlet channel 6 respectively, the air inlet 3 and the air outlet 11 are arranged at the same end of the box body 9, the air inlet 3 is arranged at a position corresponding to the end of the air inlet channel 4, and the air outlet 11 is arranged at a position corresponding to the end of the air outlet channel 6; a transition air duct 12 is formed in the gap between the plurality of battery monomers 1 in the box body 9; along the flowing direction of air at inlet air channel 4, the clearance of inlet air channel 4 reduces gradually, along the flowing direction of air at outlet air channel 6, the clearance of outlet air channel 6 reduces gradually.
Referring to fig. 6-8, an air outlet 2 is provided at the middle position of the air outlet channel 6. Through the setting in air outlet 2, can in time discharge the hot-blast after the absorption heat that is located the inside rear end of box 9, avoid the heat to stop for a long time in box 9, be favorable to reducing the temperature of whole battery box fast to simple structure, design benefit.
Referring to fig. 8, an air inlet connecting portion 7 and an air outlet connecting portion 8 protruding outwards are arranged at an end of the box 9; the air inlet connecting part 7 is arranged at the tail end of the air inlet channel 4 along the flowing direction of air in the air inlet channel 4; the air outlet connecting part 8 is arranged at the front end of the air outlet channel 6 along the flowing direction of air in the air outlet channel 6; the air inlet 3 is arranged on the air inlet connecting portion 7, and the air outlet 11 is arranged on the air outlet connecting portion 8. Through the setting of air inlet connecting portion 7 and air inlet connecting portion 8, the setting of air intake 3 and air outlet fan 5 of being convenient for.
Referring to fig. 8-10, a cooling fan 10 is disposed at the air inlet 3, and the arrangement of the cooling fan 10 is favorable for sucking air outside the case 9 into the case 9, so as to increase the air flow rate in the case 9, especially, the air flow rate at the front end of the air inlet channel 4 can be increased, so as to match with the air flow rate at the tail end of the air outlet channel 6, maintain the overall pressure difference in the case 9, and be favorable for improving the heat dissipation effect and reducing the temperature difference between the battery cells 1; in addition, the cooling fan 10 can reduce the temperature of air entering the case 9, which is advantageous for improving the heat radiation effect.
Referring to fig. 8-9, there are two rows of the battery cells 1 in the box 9, and the two rows are vertically arranged.
Referring to fig. 8 and 10, the air inlet 3 and the air outlet are both disposed between two rows of battery cells 1. Two rows of vertically arranged battery monomers 1 are arranged in the box body 9, the air inlet 3 and the air outlet 11 are arranged between the two rows of battery monomers 1, namely, in the vertical direction, the air inlet 3 and the air outlet 11 are both arranged in the middle of the end part of the box body 9, so that air can move from the gap between the two rows of battery monomers 1 to the upper side and the lower side respectively after entering the box body 9, the air is favorably and uniformly distributed between the two rows of battery monomers 1, the two rows of battery monomers 1 can be favorably kept to obtain the same heat dissipation effect, and the temperature difference between the battery monomers 1 is reduced; in addition, the heat that battery monomer 1 sent generally will pile up gradually and remove to the clearance in the box 9, and the air directly flows to between two rows of battery monomer 1 after getting into box 9, is favorable to improving the radiating effect.
Referring to fig. 6-8, the working principle of the power battery box of the gas-electric hybrid electric bus of the embodiment is as follows:
during operation, air outlet fan 5 moves, and the outside air of box 9 gets into inside the box 9 to along inlet channel 4 from the front to the back remove the rear end of box 9, and the transition removes the rear end to air outlet channel 6, and partial air directly removes air outlet channel 6 from transition passageway 12 between each battery monomer 1 simultaneously, and the box 9 is outside discharging under air outlet fan 5's effect at last. Because along the flow direction of air, inlet air duct 4 dwindles gradually, because inlet air duct 4 has the guide effect to the flow of air to the inlet air duct 4 that gradually dwindles makes the flow velocity of air faster and faster, especially the rear end of box 9 has increased the flow velocity of the regional heat dissipation air of keeping away from air intake 3 promptly, is favorable to improving the radiating effect of the battery monomer 1 of the inside rear end of box 9. Meanwhile, the air outlet channel 6 is gradually reduced along the flowing direction of air in the air outlet channel 6 and forms reverse matching with the air inlet channel 4, so that the air pressure difference at two ends of the gap between the battery monomers 1 is adjusted, the pressure difference at two sides of the inlet and the outlet of the gap between the battery monomers 1 is ensured to be consistent, the heat dissipation effect of the battery monomers 1 is consistent, and the temperature difference between the battery monomers 1 is reduced.
Referring to fig. 3 and 4, in the prior art, the air in the battery box 6a and the single battery cells 1a are subjected to grid division, initial conditions and boundary conditions are set, flow field simulation analysis in the battery box 6a is performed by FLUENT, and a steady-state temperature field of the central section of the axis of the battery box 6az is obtained by performing constant-current charge and discharge work cycle on the single battery cells 1a of LiFePO4 at 2C (40A), as shown in fig. 3. As can be seen from fig. 3 and 4, the temperature of the battery cell 1a near the air inlet 2a is highest, reaching 44.5 ℃. As the x-axis coordinate increases, the temperature of the battery cell 1a decreases closer to the outlet fan 5 a. The temperature of the single battery 1a near the air outlet fan 5a is reduced to about 28.9 ℃, and the temperature difference of the single battery 1a reaches 15.6 ℃. It can be seen that in the battery box structure of the prior art, the unreasonable fan position and air duct design cause the temperature of the battery cell 1a to be too high and the temperature difference to be too high, which affects the service life of the power battery and the performance of the HEB.
Referring to fig. 8 to 9, the grid division is performed on the air and the single battery 1 in the power battery box of the gas-electric hybrid electric bus according to the embodiment, the initial condition and the boundary condition are set, the simulation analysis of the flow field in the battery box is performed by FLUENT, and the steady-state temperature field of the z-axis central section of the battery box is obtained by performing the constant-current charging and discharging work cycle of the single battery 1 of LiFePO4 at 2C (40A), as shown in fig. 7; it can be seen that the temperature of the battery cell 1 far away from the air inlet 3 and the air outlet fan 5 in the battery box is higher, and the temperature of the battery cell 1 near the air inlet and the air outlet fan is lower. Meanwhile, as can be seen from fig. 8, the temperature of the single battery 1 of the power battery box of the gas-electric hybrid power bus in the embodiment is reduced as a whole, the maximum temperature of the single battery 1 is 28 ℃, the minimum temperature is 26 ℃, and the temperature difference of the single battery in the box body 9 is obviously reduced.
The above is the preferred embodiment of the present invention, but the embodiment of the present invention is not limited by the above, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be equivalent replacement modes, and all are included in the scope of the present invention.
Claims (6)
1. A power battery box of a gas-electricity hybrid power bus is characterized by comprising a box body, an air inlet and an air outlet, wherein an air outlet fan is arranged at the air outlet; the battery box comprises a box body, a plurality of battery monomers, an air inlet channel, an air outlet channel, an air inlet, an air outlet, an air inlet channel, an air outlet channel and a plurality of air outlets, wherein the plurality of battery monomers are arranged in the box body, gaps between two sides inside the box body and two sides of the battery monomers form the air inlet channel and the air outlet channel respectively; gaps among the plurality of battery monomers in the box body form a transition air duct; along the flowing direction of air at air inlet channel, air inlet channel's clearance dwindles gradually, along the flowing direction of air at air outlet channel, air outlet channel's clearance dwindles gradually.
2. The power battery box of the gas-electric hybrid power bus as claimed in claim 1, wherein an air outlet is provided at a middle position of the air outlet channel.
3. The power battery box of the gas-electric hybrid power bus as claimed in claim 1 or 2, wherein the end of the box body is provided with an air inlet connecting part and an air outlet connecting part which are protruded outwards; the air inlet connecting part is arranged at the tail end of the air inlet channel along the flowing direction of air in the air inlet channel; the air outlet connecting part is arranged at the front end of the air outlet channel along the flowing direction of air in the air outlet channel; the air inlet is arranged on the air inlet connecting portion, and the air outlet is arranged on the air outlet connecting portion.
4. The power battery box of a gas-electric hybrid power bus as defined in claim 1, wherein a cooling fan is provided at the air inlet.
5. The power battery box of a gas-electric hybrid power bus as in claim 1, wherein the number of the battery cells in the box body is two, and the battery cells are vertically arranged.
6. The power battery box of the gas-electric hybrid power bus as recited in claim 5, wherein the air inlet and the air outlet are both disposed between two rows of battery cells.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920809539.XU CN209880695U (en) | 2019-05-30 | 2019-05-30 | Power battery box of gas-electricity hybrid power bus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920809539.XU CN209880695U (en) | 2019-05-30 | 2019-05-30 | Power battery box of gas-electricity hybrid power bus |
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| CN209880695U true CN209880695U (en) | 2019-12-31 |
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| CN201920809539.XU Active CN209880695U (en) | 2019-05-30 | 2019-05-30 | Power battery box of gas-electricity hybrid power bus |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111555001A (en) * | 2020-05-20 | 2020-08-18 | 长春光华学院 | Battery cooling system of hybrid electric vehicle and control method thereof |
| CN113611952A (en) * | 2021-08-25 | 2021-11-05 | 合肥召洋电子科技有限公司 | Battery package cooling system and heat dissipation channel |
-
2019
- 2019-05-30 CN CN201920809539.XU patent/CN209880695U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111555001A (en) * | 2020-05-20 | 2020-08-18 | 长春光华学院 | Battery cooling system of hybrid electric vehicle and control method thereof |
| CN113611952A (en) * | 2021-08-25 | 2021-11-05 | 合肥召洋电子科技有限公司 | Battery package cooling system and heat dissipation channel |
| CN113611952B (en) * | 2021-08-25 | 2023-12-05 | 合肥召洋电子科技有限公司 | Battery pack heat dissipation system and heat dissipation channel |
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