CN213660499U - Power battery heating system and electric crane - Google Patents
Power battery heating system and electric crane Download PDFInfo
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- CN213660499U CN213660499U CN202022889743.2U CN202022889743U CN213660499U CN 213660499 U CN213660499 U CN 213660499U CN 202022889743 U CN202022889743 U CN 202022889743U CN 213660499 U CN213660499 U CN 213660499U
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The utility model provides a power battery heating system and electric crane, wherein the power battery heating system comprises a battery pack heating loop, a hydraulic cooling loop and a battery system controller, and the battery pack heating loop comprises a battery pack internal temperature adjusting pipeline, a first pump body, a first heat exchange side of a heat exchanger and a heater which are connected in series; a second heat exchange side of the heat exchanger is connected in parallel to the hydraulic cooling circuit through a first switch valve so as to introduce the hydraulic medium before cooling into a second heat exchange side of the heat exchanger; the first pump body, the heater and the first switch valve are all in signal connection with the battery system controller. The power battery heating system combines the heating and warming modes of the heater and the waste heat warming mode of the hydraulic transmission system, and the battery pack is rapidly heated by the aid of the multiple loops, so that the warming time of the battery pack is shortened, the electric energy consumption is reduced, and the working performance of the power battery system at a low temperature is improved.
Description
Technical Field
The utility model relates to an electronic hoisting equipment technical field especially relates to a power battery heating system and electric crane.
Background
The engineering crane is an indispensable device widely applied to modern industrial production of lifting, transporting, loading and unloading, mounting, personnel conveying and the like of various materials, and plays an important role in reducing labor intensity, saving manpower, reducing construction cost, improving construction quality, accelerating construction speed and realizing engineering construction mechanization. With the increasing demand for environmental protection, electric cranes are becoming an increasingly multi-user choice.
The electric crane uses a power battery as a power source, converts electric energy into mechanical energy through a motor, and then drives a corresponding working mechanism to execute various execution actions through a mechanical transmission device or a hydraulic transmission device. Because the performance of the power battery is related to the temperature, the discharge capacity of the battery is reduced at low temperature, for example, the battery capacity is reduced by about 30 percent at minus 20 ℃, and the discharge power is also reduced, so that the working time of the whole machine is shortened, and even the whole machine can not work normally under full load. In order to enable the power battery to work normally in a low-temperature environment, the current mainstream treatment method is to raise the temperature of the battery by utilizing self-heating during the working of the power battery or an external electric heating method, so as to improve the performance. However, the heating by the self-heating of the power battery during operation is time-consuming and difficult to meet the use requirement of the crane, and the battery power is still required to be consumed by the external electric heating mode, which affects the cruising ability of the battery.
SUMMERY OF THE UTILITY MODEL
The utility model provides a power battery heating system and electric crane for solve the defect that power battery heating system heating among the prior art is consuming time longer, consume too much electric energy.
The utility model provides a power battery heating system, which comprises a battery pack heating loop, a hydraulic cooling loop and a battery system controller, wherein the battery pack heating loop comprises a battery pack internal temperature adjusting pipeline, a first pump body, a first heat exchange side of a heat exchanger and a heater which are connected in series; the second heat exchange side of the heat exchanger is connected into the hydraulic cooling loop in parallel through a first switch valve so as to introduce the hydraulic medium before cooling into the second heat exchange side of the heat exchanger; the first pump body, the heater and the first switch valve are in signal connection with the battery system controller.
According to the utility model provides a pair of power battery heating system, hydraulic pressure cooling circuit is including the hydraulic transmission system hydraulic medium pipeline, first radiator and the hydraulic pump that meet in proper order, heat exchanger's second heat transfer side parallel connection in the both ends of first radiator.
According to the utility model provides a pair of power battery heating system, the import of hydraulic transmission system hydraulic medium pipeline is equipped with first temperature sensor, the export of hydraulic transmission system hydraulic medium pipeline is equipped with second temperature sensor, first temperature sensor with the equal signal connection of second temperature sensor in battery system controller.
According to the utility model provides a power battery heating system, still include the automatically controlled cooling circuit of motor, the third heat transfer side of heat exchanger inserts in parallel into the automatically controlled cooling circuit of motor through the second ooff valve to introduce the automatically controlled coolant liquid of motor before cooling to the third heat transfer side of heat exchanger; the second switch valve is in signal connection with the battery system controller.
According to the utility model provides a pair of power battery heating system, the automatically controlled cooling circuit of motor is including the motor electrical system coolant liquid pipeline, the second radiator and the second pump body that meet in proper order, heat exchanger's third heat transfer side parallel connection in the both ends of second radiator.
According to the utility model provides a pair of power battery heating system, the import of motor electrical system coolant liquid pipeline is equipped with third temperature sensor, the export of motor electrical system coolant liquid pipeline is equipped with fourth temperature sensor, third temperature sensor with the equal signal connection of fourth temperature sensor in battery system controller.
According to the utility model provides a pair of power battery heating system still includes battery package cooling circuit, battery package cooling circuit passes through the both ends of third ooff valve parallel connection in the inside pipeline that adjusts the temperature of battery package, battery package cooling circuit includes the third pump body and the battery cooler that the series connection meets, the third ooff valve with the equal signal connection of the third pump body in battery system controller.
According to the utility model provides a pair of power battery heating system, be equipped with electric core temperature sensor in the battery package, electric core temperature sensor signal connection in battery system controller.
According to the utility model provides a pair of power battery heating system, the import of the inside pipeline that adjusts the temperature of battery package is equipped with fifth temperature sensor, the export of the inside pipeline that adjusts the temperature of battery package is equipped with sixth temperature sensor, fifth temperature sensor with the equal signal connection of sixth temperature sensor in battery system controller.
The utility model also provides an electric crane, include as above-mentioned power battery heating system.
The utility model provides a power battery heating system and electric crane, wherein power battery heating system heats the temperature adjusting pipeline inside the battery pack through the heater in the battery pack heating loop, and then rapidly raises the service temperature of the power battery; meanwhile, the characteristic that the hydraulic transmission system generates a large amount of heat energy to be cooled during working is utilized, and the waste heat of the hydraulic medium of the hydraulic transmission system is used for heating the power battery during low-temperature working, so that the energy utilization rate of the whole machine is improved; and according to different heating requirements of the power battery, the heater and/or the hydraulic cooling loop can be selectively used through the battery system controller, so that the energy is saved, and the efficiency is high. The power battery heating system combines the heating and warming modes of the heater and the waste heat warming mode of the hydraulic transmission system, and the battery pack is rapidly heated by the aid of the multiple loops, so that the warming time of the battery pack is shortened, the electric energy consumption is reduced, and the working performance of the power battery system at a low temperature is improved.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the following briefly introduces the drawings required for the embodiments or the prior art descriptions, and obviously, the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic system structure diagram of a power battery heating system provided by the present invention.
Reference numerals:
1. a battery pack; 2. A battery system controller; 3. A battery pack heating loop;
31. a first pump body; 32. A heat exchanger; 321. A first heat exchange side;
322. a second heat exchange side; 323. A third heat exchange side; 33. A heater;
34. a fifth temperature sensor; 35. A sixth temperature sensor; 4. A hydraulic cooling circuit;
41. a first on-off valve; 42. A first heat sink; 43. A hydraulic pump;
44. a first temperature sensor; 45. A second temperature sensor; 5. A hydraulic transmission system;
6. an electric control cooling loop of the motor; 61. A second on-off valve; 62. A second heat sink;
63. a second pump body; 64. A third temperature sensor; 65. A fourth temperature sensor;
7. and a motor electric control system.
Detailed Description
To make the objects, technical solutions and advantages of the present invention clearer, the drawings of the present invention are combined to clearly and completely describe the technical solutions of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the embodiments of the present invention, it should be noted that the terms "first", "second", "third", "fourth", "fifth" and sixth "are used for the sake of clarity in describing the numbering of the product parts and do not represent any substantial difference, unless explicitly stated or limited otherwise. "upper", "lower", "left", "right", and the like are used only to indicate relative positional relationships, and when the absolute position of the object to be described is changed, the relative positional relationships may also be changed accordingly. The specific meaning of the above terms in the embodiments of the present invention can be understood by those skilled in the art according to specific situations.
It is to be understood that, unless otherwise expressly specified or limited, the term "coupled" is used broadly, and may, for example, refer to directly coupled devices or indirectly coupled devices through intervening media. The specific meaning of the above terms in the embodiments of the present invention can be understood in specific cases by those skilled in the art.
As shown in fig. 1, the embodiment of the present invention provides a power battery heating system, including battery pack heating circuit 3, hydraulic cooling circuit 4 and battery system controller 2, battery pack heating circuit 3 includes the temperature regulating pipeline inside battery pack 1 that the series connection meets, first pump body 31, first heat exchange side 321 of heat exchanger 32 and heater 33. The second heat exchanging side 322 of the heat exchanger 32 is connected in parallel to the hydraulic cooling circuit 4 via the first switching valve 41, so that the hydraulic medium before cooling is introduced into the second heat exchanging side 322 of the heat exchanger 32. The first pump body 31, the heater 33, and the first on-off valve 41 are all signal-connected to the battery system controller 2. The signal connection may be a wired connection, such as a communication line or an electric wire, or a wireless connection, such as WiFi, bluetooth, etc.
Specifically, the battery pack heating circuit 3 heats the electric core inside the battery pack 1 mainly by heating the temperature adjusting medium inside the temperature adjusting pipeline inside the battery pack 1. In addition, along with the increase of the operation time of the battery pack 1, the temperature of the battery pack can rise, and the normal working temperature of the battery core is neither too low nor too high, so that the temperature regulating medium in the temperature regulating pipeline inside the battery pack 1 can be cooled through another battery pack cooling loop (not shown in the figure). More specifically, the temperature regulating medium in the temperature regulating pipeline inside the battery pack 1 may be water, heat conducting oil or other medium capable of regulating temperature, and is not limited herein.
As shown in fig. 1 (note that, the solid line in fig. 1 represents a pipeline connection, and the dotted line represents a signal connection), the first pump body 31 in the battery pack heating circuit 3 is used for providing kinetic energy for the circulation flow of the battery pack temperature-regulating medium, and the heater 33 directly heats the battery pack temperature-regulating medium by an electric heating method, so as to increase the temperature-rising speed. Meanwhile, the heat exchanger 32 can also introduce a hydraulic medium before cooling in the hydraulic cooling loop 4, and heat exchange is carried out between a high-temperature hydraulic medium in the second heat exchange side 322 (tube side) and a low-temperature battery pack temperature regulating medium in the first heat exchange side 321 (shell side), so that the hydraulic medium can be cooled to maintain a reasonable working temperature, the battery pack temperature regulating medium can be heated, a large amount of waste heat released when the hydraulic transmission system 5 works is fully utilized, the energy utilization efficiency of the whole machine is improved, and the battery pack 1 can still keep efficient electric energy output in a low-temperature environment. The hydraulic medium in the hydraulic cooling circuit 4 may be hydraulic oil, water-based hydraulic fluid, or hydraulic fluid of other components, as long as it can transmit motion and power, and is not limited herein.
The heater 33 and/or the hydraulic cooling circuit 4 may also be selectively used by the battery system controller 2, depending on the different heating requirements of the power cell. When the battery pack 1 needs to be heated, the first pump body 31 is started, so that the temperature-regulating medium of the battery pack flows through the heat exchanger 32 and the heater 33; when heating using the heater 33 is required, the heater 33 is turned on by the battery system controller 2; when the waste heat of the hydraulic medium needs to be utilized, the first switching valve 41 is opened by the battery system controller 2, and the heat exchanger 32 is connected to the hydraulic cooling circuit 4. The heater 33 and the hydraulic cooling circuit 4 may be used individually or simultaneously, and may be determined according to the heating requirement of the battery pack 1.
Generally, a plurality of Battery modules in the Battery pack 1 are controlled or managed by a Battery Management System (BMS System), and each Battery module is generally formed by a plurality of Battery cells in a serial-parallel connection manner. The main functions of the BMS system include battery parameter monitoring, battery state estimation, online fault diagnosis, charge control, automatic equalization, etc., and the thermal management of the battery pack 1 is also one of the main functions of the BMS system to ensure the performance and life span of the battery system by operating the power battery within a proper temperature range. Therefore, the battery system controller 2 in this embodiment can directly adopt the BMS integrated in the battery pack 1, maintain the consistency of the control mode, and realize centralized regulation.
The power battery heating system provided by the embodiment heats the temperature adjusting pipeline inside the battery pack 1 through the heater 33 in the battery pack heating loop 3, so as to quickly raise the service temperature of the power battery; meanwhile, the characteristic that the hydraulic transmission system 5 generates a large amount of heat energy to be cooled during working is utilized, and the waste heat of the hydraulic medium of the hydraulic transmission system 5 is used for heating the power battery during low-temperature working, so that the energy utilization rate of the whole machine is improved; and according to different heating requirements of the power battery, the heater 33 and/or the hydraulic cooling circuit 4 can be selectively used by the battery system controller 2, so that the energy is saved, and the efficiency is high. The power battery heating system combines the heating and temperature rising of the heater 33 and the waste heat temperature rising of the hydraulic transmission system 5, and adopts a plurality of loops to rapidly heat the battery pack, so that the temperature rising time of the battery pack is shortened, the power consumption is reduced, and the working performance of the power battery system at low temperature is improved.
Further, as shown in fig. 1, the hydraulic cooling circuit 4 includes a hydraulic medium pipeline of the hydraulic transmission system 5, a first radiator 42 and a hydraulic pump 43 which are connected in sequence, the second heat exchanging side 322 of the heat exchanger 32 is connected in parallel to both ends of the first radiator 42, that is, a first bypass branch is provided between an outlet of the hydraulic medium pipeline of the hydraulic transmission system 5 and an inlet of the first radiator 42, and the first bypass branch is connected to the second heat exchanging side 322 of the heat exchanger 32 through a first switching valve 41.
Specifically, the hydraulic transmission system 5 mainly executes the execution of large loads such as various moving weights through the hydraulic mechanism, and since the hydraulic mechanism generates a large amount of heat during operation, the hydraulic medium is rapidly oxidized and deteriorated at high temperature, and meanwhile, the sealing ring is easily aged due to too high temperature of the hydraulic medium, which affects the service life and the working safety of the hydraulic mechanism, the hydraulic cooling circuit 4 is usually required to cool the hydraulic medium. The hydraulic pump 43 is used for providing kinetic energy for the circulating flow of the hydraulic medium, and the first radiator 42 is used for cooling the hydraulic medium. Set up first bypass branch road between the export of hydraulic medium pipeline of hydraulic transmission system 5 and the import of first radiator 42, and then can introduce the high temperature hydraulic medium before the cooling to heat exchanger 32 in the second heat exchange side 322, the hydraulic medium of high temperature is with heat transfer to microthermal battery package temperature regulating medium in heat exchanger 32, and then realizes cooling, at last returns to hydraulic cooling circuit 4 through the return line again, the backward flow fulcrum can be located between the export of first radiator 42 to the import of hydraulic pump 43.
The first bypass branch is provided with a first switch valve 41 to realize the connection and disconnection between the hydraulic cooling circuit 4 and the battery pack heating circuit 3, and then the hydraulic cooling circuit 4 can be selectively put into use according to the use requirement. The first switch valve 41 can be electrically driven by an electromagnetic valve, an electrically driven valve, or the like, so that rapid regulation and control are facilitated.
Further, as shown in fig. 1, the inlet of the hydraulic medium pipeline of the hydraulic transmission system 5 is provided with a first temperature sensor 44, the outlet of the hydraulic medium pipeline of the hydraulic transmission system 5 is provided with a second temperature sensor 45, and both the first temperature sensor 44 and the second temperature sensor 45 are in signal connection with the battery system controller 2. Furthermore, a hydraulic transmission system controller is arranged in the hydraulic transmission system 5, the first temperature sensor 44 and the second temperature sensor 45 CAN be powered and signal-collected nearby through the hydraulic transmission system controller, and then the temperature signal is transmitted to the battery system controller 2 by using a CAN bus (as shown by a dot-dash line in fig. 1). Distributed control and signal acquisition CAN be realized through a communication mode of the CAN bus, so that an expensive and heavy power distribution wiring harness is replaced.
Further, as shown in fig. 1, the power battery heating system further includes an electric motor electronically-controlled cooling circuit 6, and a third heat exchanging side 323 of the heat exchanger 32 is connected in parallel to the electric motor electronically-controlled cooling circuit 6 through a second switch valve 61, so as to introduce the electric motor electronically-controlled cooling liquid before cooling into the third heat exchanging side 323 of the heat exchanger 32. The second switching valve 61 is signal-connected to the battery system controller 2.
Specifically, similar to the hydraulic transmission system 5, the motor electronic control system 7 generates a large amount of heat during operation, and the electronic devices belong to temperature-sensitive devices and are prone to failure at high temperature, so that the usability and safety of the motor and the related electronic control system are affected, and therefore the motor electronic control cooling circuit 6 is generally required to cool the electronic devices in the motor electronic control system 7. The heat exchanger 32 is used for introducing the motor electric control cooling liquid before cooling in the motor electric control cooling loop 6, and the high-temperature cooling liquid in the third heat exchange side 323 (tube side) exchanges heat with the low-temperature battery pack temperature regulating medium in the first heat exchange side 321 (shell side), so that the motor electric control cooling liquid can be cooled, the battery pack temperature regulating medium can be heated, the waste heat released by the motor electric control system 7 during working is fully utilized, and the energy utilization efficiency of the whole machine is further improved. The electric control cooling liquid of the motor can adopt cooling water, heat conducting oil or other cooling media, and is not limited here.
Likewise, the electronically controlled cooling circuit 6 of the motor may be selectively used by the battery system controller 2 depending on the different heating requirements of the power cell. When the residual heat of the motor electric control cooling liquid is needed to be utilized, the second switch valve 61 is opened through the battery system controller 2, so that the heat exchanger 32 is connected with the motor electric control cooling loop 6. The motor electric control cooling circuit 6, the heater 33 and the hydraulic cooling circuit 4 can be used independently or simultaneously, and can be determined according to the heating requirement of the battery pack 1.
Further, as shown in fig. 1, the electric motor control cooling circuit 6 includes a cooling liquid pipeline of the electric motor control system 7, a second radiator 62 and a second pump 63 which are connected in sequence, the third heat exchanging side 323 of the heat exchanger 32 is connected in parallel to both ends of the second radiator 62, that is, a second bypass branch is arranged between an outlet of the cooling liquid pipeline of the electric motor control system 7 and an inlet of the second radiator 62, and the second bypass branch is connected to the third heat exchanging side 323 of the heat exchanger 32 through a second switch valve 61.
Specifically, the second pump 63 is configured to provide kinetic energy for the circulating flow of the coolant of the motor electronic control system 7, and the second radiator 62 is configured to dissipate heat and cool the coolant of the motor electronic control system 7. Set up second bypass branch road between the export of motor electrical system 7's coolant liquid pipeline and the import of second radiator 62, and then can introduce the coolant liquid of motor electrical system 7 of high temperature before the cooling to heat exchanger 32 in the third heat transfer side 323, the coolant liquid of high temperature is with heat transfer to microthermal battery package temperature regulating medium in heat exchanger 32, and then realize cooling, at last flow back to motor automatically controlled cooling circuit 6 through the return line again, the backward flow fulcrum can be located between the export of second radiator 62 to the import of second pump body 63.
The second bypass branch is provided with a second switch valve 61 to realize the on-off between the motor electric control cooling loop 6 and the battery pack heating loop 3, and then the motor electric control cooling loop 6 can be selectively put into use according to the use requirement. The second switch valve 61 can be electrically driven by an electromagnetic valve, an electrically driven valve or the like, so that rapid regulation and control are facilitated.
Further, as shown in fig. 1, a third temperature sensor 64 is disposed at an inlet of the cooling liquid pipeline of the motor electronic control system 7, a fourth temperature sensor 65 is disposed at an outlet of the cooling liquid pipeline of the motor electronic control system 7, and both the third temperature sensor 64 and the fourth temperature sensor 65 are in signal connection with the battery system controller 2. Furthermore, a motor electronic control system controller is arranged in the motor electronic control system 7, and the motor electronic control system controller CAN supply power and collect signals to the third temperature sensor 64 and the fourth temperature sensor 65, and then transmit the temperature signals to the battery system controller 2 by using a CAN bus (as shown by a dot-dash line in fig. 1). Distributed control and signal acquisition CAN be realized through a communication mode of the CAN bus, so that an expensive and heavy power distribution wiring harness is replaced.
Further, the system also comprises a battery pack cooling loop (not shown in the figure), the battery pack cooling loop is connected in parallel with two ends of the temperature adjusting pipeline in the battery pack 1 through a third on-off valve, the battery pack cooling loop comprises a third pump body and a battery cooler which are connected in series, and the third on-off valve and the third pump body are both connected with the battery system controller 2 through signals. Specifically, the battery cooler may employ an air-cooled radiator or a heat exchanger that exchanges heat with a vehicle refrigeration system, which is not limited herein. Can dispel the heat and cool down to the battery package 1 of long-time work through setting up battery package cooling circuit, avoid electric core overtemperature, utilize battery package cooling circuit and battery package heating circuit comprehensively, can guarantee that electric core maintains reasonable operating temperature throughout.
On the basis of the above embodiment, a cell temperature sensor is further arranged in the battery pack 1, and the cell temperature sensor is in signal connection with the battery system controller 2. The temperature of the battery core can be collected in real time by arranging the battery core temperature sensor, and then whether the battery pack heating circuit 3 needs to be put into operation or not is judged according to the actual working temperature of the battery core. Further, as shown in fig. 1, a fifth temperature sensor 34 is disposed at an inlet of the internal temperature adjusting pipeline of the battery pack 1, a sixth temperature sensor 35 is disposed at an outlet of the internal temperature adjusting pipeline of the battery pack 1, and both the fifth temperature sensor 34 and the sixth temperature sensor 35 are in signal connection with the battery system controller 2.
The control strategy of the power battery heating system will be specifically described below in conjunction with the temperature values of the respective circuits.
As shown in fig. 1, the real-time cell temperature detected by the cell temperature sensor is denoted Tba; the inlet temperature of the hydraulic medium line of the hydraulic transmission system 5 detected by the first temperature sensor 44 is denoted as Thin, and the outlet temperature of the hydraulic medium line of the hydraulic transmission system 5 detected by the second temperature sensor 45 is denoted as Thout; the inlet temperature of the cooling liquid line of the motor electronic control system 7 detected by the third temperature sensor 64 is denoted Tmin, and the outlet temperature of the cooling liquid line of the motor electronic control system 7 detected by the fourth temperature sensor 65 is denoted Tmout; the inlet temperature of the internal temperature adjusting pipe of the battery pack 1 detected by the fifth temperature sensor 34 is denoted Tbin, and the outlet temperature of the internal temperature adjusting pipe of the battery pack 1 detected by the sixth temperature sensor 35 is denoted Tbout.
(1) When the cell temperature Tba is less than Tbk, the first pump body 31 and the heater 33 are controlled to operate by the BMS system. Tbk represents a first threshold of the cell operating temperature, and this value may be modified and set according to a user requirement, and in a specific embodiment, Tbk is 0 ℃. In this case, it means that the current cell temperature is too low, and heating is required.
At this time, if thuut > Tbout, it means that the waste heat of the hydraulic transmission system 5 can be utilized, and thus the first switching valve 41 is controlled to be opened by the BMS system, otherwise the first switching valve 41 is closed. If Tmout > Tbout, it means that the waste heat of the motor electric control system 7 can be utilized, and thus the second switching valve 61 is controlled to be opened by the BMS system, otherwise the second switching valve 61 is closed.
(2) When the cell temperature Tbk is less than or equal to Tba and less than Tbx, Tmout is greater than Tbout, and thuut is greater than Tbout, the first pump body 31 is controlled to operate by the BMS system, the heater 33 does not operate, and the first switching valve 41 and the second switching valve 61 are opened. Wherein Tbx represents a second threshold of the cell operating temperature, and the value may be modified and set according to a user requirement, and in a specific embodiment, Tbx is 10 ℃. In this case, it is indicated that the current cell temperature is low, and only the waste heat is needed for heating, and the heater 33 may not be used.
(3) When the cell temperature Tba reaches the set temperature Tbx or Tbout ≧ Tbin, the first switch valve 41 and the second switch valve 61 are closed by the BMS system, and the first pump body 31 and the heater 33 are both controlled to stop working. Under the condition, the current battery core temperature meets the use requirement, and heating and temperature rising are not needed.
Through the good control strategy, the first pump body 31, the heater 33, the first switch valve 41 and the second switch valve 61 are controlled to be reasonably started or stopped by combining the temperature of each loop and the temperature of the battery cell, and energy conservation and high efficiency can be further realized.
The utility model also provides an electric crane, include as above-mentioned power battery heating system. The electric crane can comprise various types of cranes such as an electric crawler crane, an electric truck crane, an electric tire crane and the like.
As can be seen from the above embodiments, the power battery heating system and the electric crane provided by the utility model have the advantages that the power battery heating system heats the temperature adjusting pipeline inside the battery pack through the heater 33 in the battery pack heating loop 3, so as to rapidly increase the service temperature of the power battery; meanwhile, the characteristic that the hydraulic transmission system 5 generates a large amount of heat energy to be cooled during working is utilized, and the waste heat of the hydraulic medium of the hydraulic transmission system 5 is used for heating the power battery during low-temperature working, so that the energy utilization rate of the whole machine is improved; and according to different heating requirements of the power battery, the heater 33 and/or the hydraulic cooling circuit 4 can be selectively used by the battery system controller 2, so that the energy is saved, and the efficiency is high. The power battery heating system combines the heating and temperature rising of the heater 33 and the waste heat temperature rising of the hydraulic transmission system 5, and adopts a plurality of loops to rapidly heat the battery pack, so that the temperature rising time of the battery pack is shortened, the power consumption is reduced, and the working performance of the power battery system at low temperature is improved.
When the power battery heating system works at low temperature, the power battery heating system is more energy-saving compared with the traditional external heating mode, is shorter in time use compared with a self-heating mode through battery working, is beneficial to heat dissipation of the hydraulic transmission system 5 and the motor electric control system 7, and is more energy-saving. In addition, a good control strategy is set, so that the first pump body 31, the heater 33, the first switch valve 41 and the second switch valve 61 are controlled to be reasonably started or stopped, and energy conservation and high efficiency are realized.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. A power battery heating system is characterized by comprising a battery pack heating loop, a hydraulic cooling loop and a battery system controller, wherein the battery pack heating loop comprises a battery pack internal temperature adjusting pipeline, a first pump body, a first heat exchange side of a heat exchanger and a heater which are connected in series; the second heat exchange side of the heat exchanger is connected into the hydraulic cooling loop in parallel through a first switch valve so as to introduce the hydraulic medium before cooling into the second heat exchange side of the heat exchanger; the first pump body, the heater and the first switch valve are in signal connection with the battery system controller.
2. The power battery heating system of claim 1, wherein the hydraulic cooling circuit comprises a hydraulic transmission system hydraulic medium pipeline, a first radiator and a hydraulic pump which are connected in sequence, and the second heat exchange side of the heat exchanger is connected to two ends of the first radiator in parallel.
3. The power battery heating system of claim 2, wherein a first temperature sensor is arranged at an inlet of the hydraulic transmission system hydraulic medium pipeline, a second temperature sensor is arranged at an outlet of the hydraulic transmission system hydraulic medium pipeline, and the first temperature sensor and the second temperature sensor are both in signal connection with the battery system controller.
4. The power battery heating system according to claim 1, further comprising a motor electrically-controlled cooling loop, wherein a third heat exchange side of the heat exchanger is connected in parallel to the motor electrically-controlled cooling loop through a second switching valve, so that motor electrically-controlled cooling liquid before cooling is introduced to a third heat exchange side of the heat exchanger; the second switch valve is in signal connection with the battery system controller.
5. The power battery heating system of claim 4, wherein the motor electronic control cooling loop comprises a motor electronic control system cooling liquid pipeline, a second radiator and a second pump body which are sequentially connected, and the third heat exchange side of the heat exchanger is connected to two ends of the second radiator in parallel.
6. The power battery heating system according to claim 5, wherein a third temperature sensor is arranged at an inlet of the motor electric control system cooling liquid pipeline, a fourth temperature sensor is arranged at an outlet of the motor electric control system cooling liquid pipeline, and the third temperature sensor and the fourth temperature sensor are both in signal connection with the battery system controller.
7. The power battery heating system according to claim 1, further comprising a battery pack cooling loop, wherein the battery pack cooling loop is connected in parallel to two ends of the temperature regulating pipeline inside the battery pack through a third on-off valve, the battery pack cooling loop comprises a third pump body and a battery cooler which are connected in series, and the third on-off valve and the third pump body are both in signal connection with the battery system controller.
8. The power battery heating system of any one of claims 1-7, wherein a cell temperature sensor is disposed within the battery pack, the cell temperature sensor being in signal connection with the battery system controller.
9. The power battery heating system according to claim 8, wherein a fifth temperature sensor is arranged at an inlet of the temperature regulating pipeline inside the battery pack, a sixth temperature sensor is arranged at an outlet of the temperature regulating pipeline inside the battery pack, and the fifth temperature sensor and the sixth temperature sensor are both in signal connection with the battery system controller.
10. An electric crane, characterized in that it comprises a power battery heating system according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202022889743.2U CN213660499U (en) | 2020-12-03 | 2020-12-03 | Power battery heating system and electric crane |
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| CN202022889743.2U CN213660499U (en) | 2020-12-03 | 2020-12-03 | Power battery heating system and electric crane |
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| CN213660499U true CN213660499U (en) | 2021-07-09 |
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| CN202022889743.2U Active CN213660499U (en) | 2020-12-03 | 2020-12-03 | Power battery heating system and electric crane |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114261255A (en) * | 2021-12-03 | 2022-04-01 | 中联重科土方机械有限公司 | Thermal management system of vehicle and excavator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114261255A (en) * | 2021-12-03 | 2022-04-01 | 中联重科土方机械有限公司 | Thermal management system of vehicle and excavator |
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