CN219017760U - Thermal management system based on battery pack and gear box - Google Patents
Thermal management system based on battery pack and gear box Download PDFInfo
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- CN219017760U CN219017760U CN202223178160.4U CN202223178160U CN219017760U CN 219017760 U CN219017760 U CN 219017760U CN 202223178160 U CN202223178160 U CN 202223178160U CN 219017760 U CN219017760 U CN 219017760U
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E60/10—Energy storage using batteries
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Abstract
The utility model provides a thermal management system based on a battery pack and a gear box, wherein the gear box is in oil connection with a heat exchanger through an oil pipeline; a cooling coil is arranged in the battery pack; the cooling coil is connected with a shunt valve, and the shunt valve is connected with the heat exchanger through a shunt pipeline; the diverter valve passes through the cooling loop and the radiator; and the control device controls the operation of the diverter valve according to the acquired temperature information. The utility model can realize the heat exchange control between the cooling fluid in the battery pack cooling loop and the gear box lubricating oil through the split flow pipeline, the split flow valve, the heat exchanger and the control device which are communicated with the battery pack cooling loop, realize the mutual heating and cooling between the battery pack cooling fluid and the gear box lubricating oil, and keep the battery drive gear box and the battery pack to work under proper temperature conditions.
Description
Technical Field
The utility model relates to the technical field of vehicle thermal management, in particular to a thermal management system based on a battery pack and a gear box.
Background
Thermal management is a key measure to improve the operational reliability and transmission efficiency of electric drive systems. For the battery pack, maintaining proper operation temperature is necessary guarantee for guaranteeing safe and efficient charging and driving discharging, and the problem that the battery pack is charged, discharged efficiency is reduced and even the battery pack is in fault due to abnormal temperature; especially for fast charging processes of high voltage platforms, the cooling demand power of the battery pack may be as high as 15-20kw. For a gear box, the transmission efficiency is greatly reduced due to the fact that the operation temperature is too high or too low, and the reliability of the gear box is adversely affected; especially in the initial stage of starting, the stirring loss is higher due to the excessive viscosity of the low-temperature lubricating oil, and the like, so that the mechanical transmission efficiency is 1-5% lower than that at the normal operating temperature.
At present, the temperature control scheme of the battery pack mainly comprises two types of high-temperature cooling and low-temperature heating, and two working conditions of charging and driving. High temperature cooling typically uses a water-cooled radiator and low temperature heating uses a water heater. The temperature control scheme of the gear box mainly comprises two types of high-temperature cooling and low-temperature heating, wherein the high-temperature cooling generally adopts three types of shell natural cooling, air-cooled oil cooler cooling and liquid-cooled oil cooler cooling, and the low-temperature heating comprises various patent schemes such as electric heater heating, engine oil heating, engine cooling fluid heating, engine cylinder heating, waste gas recovery heating and the like. In many studies, the battery pack and the gear case are typically temperature controlled via a completely separate cooling circuit.
Chinese patent application publication No. CN112977168A discloses a thermal management system for battery packs and other electrically driven components (electric motor or inverter system controller) of an electrically powered vehicle. Enhanced cooling of the electrically driven components using the battery cooling circuit under certain conditions is achieved. The disclosed scheme can realize the comprehensive heat management of the battery and the electric driving part, but can only realize the cooling of the battery cooling circuit to the electric driving part, and the system has single function; the electric drive cooling circuit is needed to realize the control of the electric drive temperature based on the electric drive cooling circuit and the fluid control of the battery cooling circuit; the control unit only monitors the current temperature of the electric drive system, but cannot monitor the battery pack cooling circuit, and adverse effects of weakening the battery pack cooling capacity can be caused under the conditions that the working load of the battery pack cooling circuit is large and the temperature of the electric drive component cooling circuit is high; furthermore, it requires a cooling circuit of the electric drive system to effect cooling of the electric drive components, which is not possible for an electric drive gearbox without the associated cooling system.
Chinese patent application publication No. CN113193260a discloses a thermal management method based on an electrically driven thermal management system and a battery thermal management system. The heating of the vehicle battery based on the electrically driven cooling water and the battery heating water is realized. The disclosed scheme can realize the comprehensive heat management of the battery pack and the electric drive component, but can only realize the heating of the electric drive cooling water to the battery pack, and the system has single function; it requires an electrically driven cooling circuit and is controlled with the heated water circulation circuit of the battery thermal management system; the method only monitors the external environment temperature of the vehicle and the water inlet temperature of a cooling water circulation loop of the electric drive system of the vehicle, but cannot monitor a cooling loop of the battery pack, and cannot accurately meet the heating requirement of the battery pack; furthermore, it requires a cooling circuit of the electric drive system to effect heating of the battery pack, which is not possible for an electric drive gearbox without the associated cooling system.
Disclosure of Invention
In order to overcome the defects in the prior art, the utility model provides a thermal management system based on a battery pack and a gear box, and the system has the advantages of simple structure, stable control and high reliability.
The thermal management system between the battery pack and the gear case comprises: control device, diverter valve, radiator, heat exchanger, battery pack with cooling fluid and gear box with lubricating oil;
the output end of the gear box is connected with the oil input end of the heat exchanger through an oil pipeline, and the oil output end of the heat exchanger is connected with the input end of the gear box through an oil pipeline;
a cooling coil is arranged in the battery pack;
the output end of the cooling coil is connected with the input end of the flow dividing valve, and the first output end of the flow dividing valve is connected with the exchange input end of the heat exchanger through a flow dividing pipeline; the exchange output end of the heat exchanger is connected with the first input end of the cooling coil pipe through a shunt pipeline;
the second output end of the diverter valve is connected with the input end of the radiator through the cooling loop, and the output end of the radiator is connected with the second input end of the cooling coil;
the control device is used for acquiring the target upper limit value of the cooling fluid temperature of the battery pack, the target temperature range of the lubricating oil of the gear box, the temperature of the lubricating oil of the gear box and the temperature of the cooling fluid of the battery pack, and controlling the operation of the diverter valve according to the acquired temperature information.
It should be further noted that the input end and the output end of the gear box are respectively provided with a first temperature sensor;
the input end and the output end of the cooling coil are respectively provided with a second temperature sensor;
the control device is connected with the first temperature sensor to acquire temperature information of lubricating oil of the gear box;
the control device is connected with the second temperature sensor to acquire temperature information of the cooling fluid of the cooling coil.
It is further noted that the upper limit value of the target temperature of the battery pack cooling fluid obtained by the control device is 28 ℃ to 30 ℃.
Further, the control device includes: the device comprises a microcontroller, a data input module and a display screen;
the microcontroller is connected with the data input module and is used for acquiring a target temperature upper limit value of cooling fluid of the motor and a target temperature range of lubricating oil of the gear box, which are set by a user;
the microcontroller compares the temperature of the gear box lubricating oil with the target temperature range of the gear box lubricating oil, compares the temperature of the battery pack cooling fluid with the target temperature upper limit value of the battery pack cooling fluid, and controls the operation of the diverter valve according to the comparison result.
It should be further noted that the gearbox may take the form of an electric drive axle, or wheel drive.
It should be further noted that the oil line is provided with a lubricant driving pump and a filter.
It is further noted that the heat exchanger is mounted within the gearbox housing, or outside the gearbox housing, or on the frame.
From the above technical scheme, the utility model has the following advantages:
according to the thermal management system between the battery pack and the gear box, which is provided by the utility model, the heat exchange control between the battery pack cooling fluid and the gear box lubricating oil can be realized through the split flow pipeline, the split flow valve, the heat exchanger and the control device which are communicated with the battery pack cooling loop, so that the battery pack cooling fluid and the gear box lubricating oil can be mutually heated and cooled, and the battery drive gear box and the battery pack can be kept to work under a proper temperature condition.
The utility model can realize thermal management in various scenes, such as pre-increasing the temperature of the lubricating oil of the gear box in the charging stage, improving the transmission efficiency of the gear box in the initial operation stage (cold stage), reducing the working load of a battery pack cooling system and improving the charging reliability of the battery pack.
In the driving stage, the temperature of the lubricating oil of the gear box is increased under the low-temperature working condition of the gear box, and the transmission efficiency of the gear box is improved; the temperature of the gearbox lubricating oil is reduced under the high-temperature working condition, the transmission efficiency of the gearbox is improved, the service life of the gearbox lubricating oil is prolonged, and the working reliability of the gearbox is improved; and the temperature of the cooling fluid of the battery pack is reduced under the high-temperature working condition of the battery pack, and meanwhile, the working load of a cooling system of the battery pack is reduced, so that the working reliability of the battery pack is ensured. Compared with the existing battery-driven gear box thermal management technology, the method provided by the application can realize comprehensive thermal management of the battery pack and the gear box, realize functions of charging and driving temperature adjustment of the gear box and the battery pack such as gear box charging and preheating, and has the advantages of simple structure and reliable operation.
Drawings
In order to more clearly illustrate the technical solutions of the present utility model, the drawings that are needed in the description will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a thermal management system between a battery pack and a gearbox.
Detailed Description
In order to make the objects, features and advantages of the present utility model more obvious and understandable, the technical solutions of the present utility model will be clearly and completely described below with reference to the drawings in this specific embodiment, and it is apparent that the embodiments described below are only some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, based on the embodiments in this patent, which would be within the purview of one of ordinary skill in the art without the particular effort to make the utility model are intended to be within the scope of the patent protection.
The utility model provides a thermal management system based on a battery pack and a gear box, as shown in fig. 1, the system comprises: a control device, a flow dividing valve 5, a radiator 3, a heat exchanger 4, a battery pack 1 with cooling fluid, and a gear box 2 with lubricating oil; wherein the gearbox 2 takes the form of an electric drive axle, or wheel drive. The heat exchanger 4 is installed in the gear box 2, or outside the gear box 2, or on the frame.
The output end of the gear box 2 is connected with the oil input end of the heat exchanger 4 through an oil pipeline 7, and the oil output end of the heat exchanger 4 is connected with the input end of the gear box 2 through the oil pipeline 7; a cooling coil is arranged in the battery pack 1; the cooling coil may dissipate heat from the battery pack 1. The cooling coil may be mounted inside the battery pack 1. Or may be attached to the outer walls of the cells of the battery pack 1. The output end of the cooling coil is connected with the input end of the flow dividing valve 5, and the first output end of the flow dividing valve 5 is connected with the exchange input end of the heat exchanger 4 through a flow dividing pipeline 8; the exchange output end of the heat exchanger 4 is connected with the first input end of the cooling coil pipe through a shunt pipeline 8; the second output end of the diverter valve 5 is connected with the input end of the radiator 3 through the cooling loop 6, and the output end of the radiator 3 is connected with the second input end of the cooling coil;
heat exchange between the gear box 2 and the battery pack 1 can be achieved through the shunt pipeline 8 and the heat exchanger 4. The shunt line 8 may be in parallel relationship with the radiator 3.
The input end and the output end of the gear box 2 are respectively provided with a first temperature sensor; the input end and the output end of the cooling coil are respectively provided with a second temperature sensor; the control device is connected with the first temperature sensor to acquire temperature information of lubricating oil of the gear box 2; the control device is connected with the second temperature sensor to acquire temperature information of the cooling fluid of the cooling coil.
The control device is used for acquiring the upper limit value of the target temperature of the cooling fluid of the battery pack 1, the target temperature range of the lubricating oil of the gear box 2, the temperature of the lubricating oil of the gear box 2 and the temperature of the cooling fluid of the battery pack 1, and controlling the operation of the flow dividing valve 5 according to the acquired temperature information.
In order to enable the flow of fluid inside the system, a shunt drive pump is provided on the shunt line 8. The cooling circuit 6 is provided with a cooling drive pump. The oil pipeline 7 is provided with a lubricating oil driving pump and a filter.
In the present utility model, the control device includes: the device comprises a microcontroller, a data input module and a display screen; the microcontroller is connected with the data input module and is used for acquiring the upper limit value of the target temperature of the cooling fluid of the motor and the target temperature range of the lubricating oil of the gear box 2, which are set by a user;
the microcontroller compares the temperature of the lubricating oil of the gear box 2 with the target temperature range of the lubricating oil of the gear box 2, compares the temperature of the cooling fluid of the battery pack 1 with the upper limit value of the target temperature of the cooling fluid of the battery pack 1, and controls the operation of the flow dividing valve 5 according to the comparison result.
As an embodiment of the present utility model, in step S10, the system is automatically started, and the battery pack cooling fluid flows through the radiator via the battery pack cooling circuit, and does not flow through the shunt line.
Step S20, determining a battery pack target temperature range. The control device acquires a battery pack target temperature range. Wherein the battery pack cooling fluid target temperature lower limit value T Lower limit of electricity Upper limit value T of target temperature of battery pack cooling fluid Upper limit of electricity The temperature of the battery pack is set based on the optimal level for the specific application scenario. Specifically, a preferred target temperature range is 28℃to 30 ℃.
Step S30, the control device continuously acquires the temperature T of the battery pack Electric power Battery pack cooling fluid temperature T Water and its preparation method And gearbox lube temperature T Oil (oil) 。
Step S40, comparing the temperature value monitored in step S30 with the target temperature range set in step S20, specifically as follows:
when the battery pack temperature T Electric power Above the upper limit T of the target temperature range Upper limit of electricity And the temperature T of the lubricating oil of the gear box Oil (oil) Lower than the battery pack cooling fluid temperature T Water and its preparation method When passing to step S50, the battery pack cooling fluid is directed through a heat exchanger.
According to the application scene of the utility model, when the battery pack is charged, the battery pack cooling fluid is used for heating the gear box lubricating oil so as to reduce the working load of a battery pack cooling system, and meanwhile, the gear box lubricating oil is preheated, so that the transmission efficiency of the gear box is improved. The effect of simultaneously reducing the working energy consumption of the battery-driven gear box in two aspects of reducing the power consumption of the battery pack cooling system and improving the transmission efficiency of the gear box is achieved.
When the battery pack temperature T Electric power Below the target temperature range lower limit T Lower limit of electricity And the temperature T of the lubricating oil of the gear box Oil (oil) Higher than the battery pack cooling fluid temperature T Water and its preparation method When passing to step S50, the battery pack cooling fluid is directed through a heat exchanger.
The utility model also relates to an application scene, when the battery pack discharges under the light-load high-speed working condition in the cold region, the gear box lubricating oil is used for heating the battery pack cooling fluid, and the battery pack heating system is assisted to work so as to reduce the power consumption of the battery pack heating system and improve the discharge efficiency of the battery pack.
In the rest, turning to step S60, the battery pack cooling fluid does not pass through the heat exchanger.
Step S50, the battery pack cooling fluid flows through the gearbox heat exchanger via the split line;
in step S60, the battery pack cooling fluid flows only through the battery pack cooling circuit and does not flow through the gearbox heat exchanger.
The utility model can realize the heat exchange control between the cooling fluid in the battery pack cooling loop and the gear box lubricating oil through the split flow pipeline, the split flow valve, the heat exchanger and the control device which are communicated with the battery pack cooling loop, realize the mutual heating and cooling between the battery pack cooling fluid and the gear box lubricating oil, and keep the battery drive gear box and the battery pack to work under proper temperature conditions.
The control means described in the present utility model may be implemented in hardware, software, firmware or any combination thereof. The various features described are modules, units, or components that may be implemented together in an integrated logic device or separately as discrete but interoperable logic devices or other hardware devices. In some cases, various features of the electronic circuit may be implemented as one or more integrated circuit devices, such as an integrated circuit chip or chipset.
The control device may be implemented as a processor or as an integrated circuit device, such as an integrated circuit chip or chip set. Alternatively or additionally, if implemented in software or firmware, the techniques may implement a data storage medium readable at least in part by a computer comprising instructions that, when executed, cause a processor to perform one or more of the methods described above. For example, a computer-readable data storage medium may store instructions such as those executed by a processor.
The terms "first," "second," "third," "fourth" and the like in the description and in the claims and in the above drawings, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the utility model described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. A thermal management system between a battery pack and a gearbox, comprising: control device, diverter valve, radiator, heat exchanger, battery pack with cooling fluid and gear box with lubricating oil;
the output end of the gear box is connected with the oil input end of the heat exchanger through an oil pipeline, and the oil output end of the heat exchanger is connected with the input end of the gear box through an oil pipeline;
a cooling coil is arranged in the battery pack;
the output end of the cooling coil is connected with the input end of the flow dividing valve, and the first output end of the flow dividing valve is connected with the exchange input end of the heat exchanger through a flow dividing pipeline; the exchange output end of the heat exchanger is connected with the first input end of the cooling coil pipe through a shunt pipeline;
the second output end of the diverter valve is connected with the input end of the radiator through the cooling loop, and the output end of the radiator is connected with the second input end of the cooling coil;
the control device is used for acquiring the target upper limit value of the cooling fluid temperature of the battery pack, the target temperature range of the lubricating oil of the gear box, the temperature of the lubricating oil of the gear box and the temperature of the cooling fluid of the battery pack, and controlling the operation of the diverter valve according to the acquired temperature information.
2. The battery pack and gearbox based thermal management system of claim 1, wherein,
the input end and the output end of the gear box are respectively provided with a first temperature sensor;
the input end and the output end of the cooling coil are respectively provided with a second temperature sensor;
the control device is connected with the first temperature sensor to acquire temperature information of lubricating oil of the gear box;
the control device is connected with the second temperature sensor to acquire temperature information of the cooling fluid of the cooling coil.
3. The battery pack and gearbox based thermal management system of claim 1, wherein,
the upper limit value of the target temperature of the battery pack cooling fluid obtained by the control device is 28-30 ℃.
4. The battery pack and gearbox based thermal management system of claim 1, wherein,
the control device comprises: the device comprises a microcontroller, a data input module and a display screen;
the microcontroller is connected with the data input module and is used for acquiring a target temperature upper limit value of cooling fluid of the motor and a target temperature range of lubricating oil of the gear box, which are set by a user;
the microcontroller compares the temperature of the gear box lubricating oil with the target temperature range of the gear box lubricating oil, compares the temperature of the battery pack cooling fluid with the target temperature upper limit value of the battery pack cooling fluid, and controls the operation of the diverter valve according to the comparison result.
5. The battery pack and gearbox based thermal management system of claim 1, wherein,
the gear box adopts an electric drive axle or wheel side drive mode.
6. The battery pack and gearbox based thermal management system of claim 1, wherein,
the oil pipeline is provided with a lubricating oil driving pump and a filter.
7. The battery pack and gearbox based thermal management system of claim 1, wherein,
the heat exchanger is installed in the gear box body, or outside the gear box body, or on the frame.
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| CN202223178160.4U CN219017760U (en) | 2022-11-30 | 2022-11-30 | Thermal management system based on battery pack and gear box |
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| CN202223178160.4U CN219017760U (en) | 2022-11-30 | 2022-11-30 | Thermal management system based on battery pack and gear box |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024114323A1 (en) * | 2022-11-30 | 2024-06-06 | 中国重汽集团济南动力有限公司 | Thermal management system and method for electric drive gearbox |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024114323A1 (en) * | 2022-11-30 | 2024-06-06 | 中国重汽集团济南动力有限公司 | Thermal management system and method for electric drive gearbox |
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