A simulation test device for immersion liquid-cooled energy storage systems

Abstract

This invention discloses a simulation testing device for an immersion liquid-cooled energy storage system, comprising a housing, a coolant disposed within the housing, and condenser tubes for cooling the coolant. Several battery cells are immersed in the coolant. Several pinholes are provided on the upper side of the housing, and sealing plates are disposed within each pinhole for sealing the pinholes. The sealing plates have pinholes. A probe extending vertically above each pinhole for measuring the coolant temperature is disposed thereon. The simulation testing device also includes a lifting device for raising and lowering the probe. This invention proposes a simulation testing device for an immersion liquid-cooled energy storage system that minimizes coolant disturbance and improves testing accuracy.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of simulation test devices, in particular to a simulation test device for an immersed liquid-cooled energy storage system. BACKGROUND

[0002] The existing liquid-cooled energy storage system includes a shell, the shell is filled with cooling liquid, the cooling liquid is immersed without a condenser pipe and a plurality of battery cells, the condenser pipe is connected with a compressor, the cooling liquid absorbs the heat of the battery cells to cool the battery cells when the battery cells work, and the condenser pipe cools the cooling liquid. Compared with the air-cooled cooling energy storage system, the cooling effect of the energy storage system is better, the battery cells can always maintain a lower temperature, thereby improving the service life of the battery cells. When designing such an energy storage system, the uniformity of the temperature in the shell needs to be considered, that is, the temperature difference between different positions in the shell needs to be small, so that the degradation rate of each battery cell is consistent. When simulating and testing the designed energy storage system, the existing technology often needs to set temperature sensors at different positions of the battery cells, the temperature sensors are immersed in the cooling liquid from the beginning to the end, and the number of temperature sensors is large. These temperature sensors will affect the flow of the cooling liquid, and the environment of the cooling liquid in the actual working condition of the energy storage system is quite different, which will affect the conduction of the temperature in the shell, thereby affecting the accuracy of the simulation test. SUMMARY

[0003] The present application is to solve the problem of the prior art that the cooling liquid is disturbed too much, thereby affecting the accuracy of the test, and proposes a simulation test device for an immersed liquid-cooled energy storage system, which has little disturbance to the cooling liquid and improves the accuracy of the test.

[0004] To achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0005] A simulation test device for an immersed liquid-cooled energy storage system, comprising a shell, the shell is provided with cooling liquid and a condenser pipe for cooling the cooling liquid, the cooling liquid is immersed without a plurality of battery cells, the upper side of the shell is provided with a plurality of pinholes, the pinholes are provided with sealing pieces for sealing the pinholes, the sealing pieces are provided with pinholes, the upper side of the pinholes is provided with a probe extending vertically for measuring the temperature of the cooling liquid, the simulation test device further comprises a lifting device for lifting the probe.

[0006] By the above setting, the shell, the cooling liquid, the battery cell and the condenser tube simulate the energy storage system to be tested. Before the test, the temperature of the cooling liquid is uniform. Under the action of the lifting device, the probe moves downward through the needle hole and enters the cooling liquid, the initial temperature of the cooling liquid is measured and recorded, and the initial temperature can be used as the initial temperature of each measuring point of the cooling liquid. The material of the sealing sheet can be rubber, which has good elasticity. When the probe passes through the needle hole, the needle hole expands, and the sealing sheet prevents the heat in the shell from leaving the shell through the needle hole, thereby simulating the sealing characteristics of the shell of the real energy storage system. After the probe measures the initial temperature, the probe moves upward and leaves the shell under the action of the lifting device, and the sealing sheet restores, that is, the needle hole is closed by the needle hole. During the upward movement of the probe, the sealing sheet can scrape off the cooling liquid on the surface of the probe, thereby preventing the loss of the cooling liquid in the shell, and further maintaining the variable control principle, that is, improving the accuracy of the test. After the test starts, the battery cell is powered on, the cooling liquid absorbs the heat of the battery cell, and the condenser tube cools the cooling liquid, thereby simulating the normal operation of the energy storage system. In this process, the probe is not immersed in the cooling liquid, that is, the environment of the cooling liquid is consistent with that in the real energy storage system. After one hour, the probe moves downward and inserts into the cooling liquid under the action of the lifting device, the temperature of each measuring point of the cooling liquid is measured and recorded, and after the measurement is completed, the probe leaves the cooling liquid under the action of the lifting device. Subsequently, the temperature of each measuring point of the cooling liquid is measured and recorded every half hour by using the probe, a total of five times, and the probe leaves the cooling liquid after each measurement. After the above measurement, the measured temperature is finally arranged, and a time-temperature curve is drawn for each measuring point, so that the temperature change of each measuring point can be known, and the uniformity of the temperature of the energy storage system can be known by comparing the temperatures of each measuring point.

[0007] Further, the lower end of the probe is in the shape of a cone with the vertex downward.

[0008] By the above setting, the probe has smaller disturbance to the cooling liquid when it is inserted downward into the cooling liquid.

[0009] Further, the simulation test device further comprises a plurality of lifting seats, the lower side of each lifting seat is fixedly connected with a probe, and the lifting device is connected with the lifting seats and used to drive the lifting seats to move up and down.

[0010] By the above setting, the lifting seat is used for connecting the probe, and the lifting device can control different lifting seats to move downward in sequence, that is, the lifting device can control different probes to move downward in sequence to measure the temperature. Specifically, the number of lifting seats is four, and each lifting seat is fixedly connected with a plurality of probes on the lower side. The four lifting seats are sequentially named as the first seat, the second seat, the third seat and the fourth seat. The four lifting seats can be lifted or lowered by the lifting device to measure the temperature of the cooling liquid at the corresponding measuring point through the corresponding probe. Before testing, the first seat is lowered to measure the initial temperature of the cooling liquid, which can be used as the initial temperature of each measuring point. After the measurement is completed, the first seat moves upward, and the probe leaves the shell. After the test starts, the battery is powered on, the cooling liquid absorbs the heat of the battery, and the condenser pipe cools the cooling liquid, thereby simulating the normal operation of the energy storage system. After one hour, an alternating measurement is performed. The specific steps of the alternating measurement are as follows: first, the first seat moves downward, the temperature of the corresponding measuring point is measured and recorded, and after the measurement is completed, the first seat moves upward and leaves the shell; then, in the same way, the second seat moves downward, the temperature of the corresponding measuring point is measured and recorded, and after the measurement is completed, the second seat moves upward and leaves the shell; the third seat moves downward, the temperature of the corresponding measuring point is measured and recorded, and after the measurement is completed, the third seat moves upward and leaves the shell; the fourth seat moves downward, the temperature of the corresponding measuring point is measured and recorded, and after the measurement is completed, the fourth seat moves upward and leaves the shell. After that, every half hour, an alternating measurement is performed, and a total of five alternating measurements are performed. Through the above steps, a plurality of time-temperature discrete points of each measuring point are obtained, and the computer is used to fit these discrete points to obtain the time-temperature curve of each measuring point. By comparing the shape and similarity of the time-temperature curves of each measuring point, the temperature consistency of each measuring point at any time during the test can be obtained. According to the test results, the designed energy storage system can be optimized and adjusted. Through the alternating measurement method, the number of probes entering the cooling liquid is greatly reduced each time, which can effectively reduce the disturbance of the probe to the cooling liquid, and thereby improve the measurement accuracy.

[0011] Further, the upper end of the probe is threadedly connected with the lifting seat.

[0012] By the above setting, the installation and replacement of the probe are facilitated.

[0013] Further, the lifting device comprises a base arranged above the shell, the lower side of the base is provided with an open downward chute, the upper side of the lifting seat is fixedly connected with a plunger slidingly connected in the chute, the base is provided with a rotating groove extending in the horizontal direction, the rotating groove is rotatably connected with a rotating shaft, the base is provided with a driving device for driving the rotating shaft to rotate along the axis of the rotating shaft, the rotating shaft is provided with a first air channel extending along the axis direction of the rotating shaft, the first air channel is communicated with an air pump, the lower side of the rotating groove is provided with a plurality of second air channels, the second air channels are sequentially arranged along the extension direction of the rotating groove, the number of the second air channels is consistent with the number of the chute and corresponds to the chute one by one, the rotating groove and the chute are communicated through the second air channels, the upper side of each second air channel is provided with a third air channel, the third air channel is arranged on the rotating shaft and communicated with the first air channel, when any one second air channel is communicated with the corresponding third air channel, the other second air channels are staggered with the corresponding third air channels.

[0014] Through the above arrangement, when the third air channel on the upper side of the first seat is communicated with the second air channel, the third air channels on the upper sides of the other lifting seats are staggered with the second air channels. The air pump transports air to the chute of the first seat through the first air channel, the third air channel and the second air channel, at this time, the first seat will move downward under the action of air pressure; when the air pump exhausts air outward, the first seat will move upward under the action of air pressure. Under the action of the driving device, the rotating shaft rotates, the second air channel on the upper side of the first seat is staggered with the third air channel, and the second air channel on the upper side of the second seat is communicated with the third air channel, at this time, the lifting of the second seat can be controlled by the air pump. Similarly, different second air channels and third air channels can be communicated by the driving device to control the lifting of different lifting seats. The present application only needs one driving device and one air pump to control the lifting of multiple lifting seats, which is simple in structure and convenient to maintain.

[0015] Further, the rotating groove penetrates both ends of the base, and the driving device is a motor, one end of the rotating shaft is connected with the motor.

[0016] Through the above arrangement, the motor can be easily obtained from the market, and the production and maintenance of the present application are facilitated.

[0017] Further, one end of the rotating shaft away from the motor is provided with a connecting head, the connecting head is rotatably sealed with the rotating shaft, and the air pump is communicated with the first air channel through the connecting head.

[0018] Through the above arrangement, the connecting head is fixedly connected with the base, when the rotating head is rotatably sealed with the rotating shaft, the air pump can inflate or exhaust air to the first air channel when the rotating shaft rotates. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a top view of the shell of the embodiment of the present application.

[0020] Figure 2 It is a sectional view of the shell of the embodiment of the present application.

[0021] Figure 3 is a schematic view of an embodiment of the application.

[0022] Figure 4 is a schematic view of a pivot of an embodiment of the application.

[0023] Figure 5 is a schematic view of a first seat of an embodiment of the application moving downwards. Figure 3 is an enlarged view of A of Fig.

[0024] Figure 6 is a schematic view of a first seat of an embodiment of the application moving downwards.

[0025] Figure 7 is a schematic view of a second seat of an embodiment of the application moving downwards. DETAILED DESCRIPTION

[0026] The technical solutions of the application are further specifically described below by embodiments and in conjunction with the drawings.

[0027] Referring to Figures 1 to 7 A simulation test device for an immersion liquid cooling energy storage system comprises a shell 11, a cooling liquid and a condenser pipe 12 for cooling the cooling liquid are arranged in the shell 11, the cooling liquid immerses a plurality of battery cells 13, a plurality of needle holes 111 are arranged on the upper side of the shell 11, a sealing sheet 112 for sealing the needle holes 111 is arranged in the needle holes 111, the sealing sheet 112 is provided with a needle eye 113, the upper side of the needle holes 111 is provided with a probe 14 extending vertically for measuring the temperature of the cooling liquid, the simulation test device further comprises a lifting device 15 for lifting the probe 14.

[0028] The housing 11, coolant, battery cell 13, and condenser tube 12 simulate the energy storage system to be tested. Before testing, the coolant temperature is uniform. Under the action of the lifting device 15, the probe 14 moves downward, passes through the needle hole 113, and enters the coolant to measure and record the initial temperature of the coolant. This initial temperature can be used as the initial temperature of each measurement point of the coolant. The sealing plate 112 can be made of rubber, which has good elasticity. When the probe 14 passes through the needle hole 113, the needle hole 113 expands, and the sealing plate 112 prevents heat from leaving the housing 11 through the needle hole 111, thus simulating the sealing characteristics of the outer shell of a real energy storage system. After the probe 14 measures the initial temperature, under the action of the lifting device 15, the probe 14 moves upward and leaves the housing 11, the sealing plate 112 returns to its original position, that is, the needle hole 113 shrinks and closes the needle hole 111. During the ascent of probe 14, the sealing plate 112 scrapes off the coolant from the surface of probe 14, preventing coolant leakage from the housing 11 and further upholding the variable control principle, thus improving test accuracy. After the test begins, cell 13 is energized, and the coolant absorbs heat from cell 13, while the condenser tube 12 cools the coolant, simulating normal operation of the energy storage system. During this process, probe 14 is not immersed in the coolant, meaning the environment of the coolant is consistent with its environment in a real energy storage system. After one hour, under the action of the lifting device 15, probe 14 moves downward and inserts into the coolant, measuring and recording the temperature at each measurement point. After the measurement is completed, probe 14 leaves the coolant under the action of the lifting device 15. Subsequently, every half hour, probe 14 is used to measure and record the temperature at each measurement point of the coolant, for a total of five measurements and records. After each measurement, probe 14 leaves the coolant. After the above measurements, the measured temperatures are processed and time-temperature curves are plotted for each measurement point. This allows us to know the temperature changes at each measurement point, and by comparing the temperatures at each measurement point, we can determine the temperature uniformity of the energy storage system.

[0029] The lower end of probe 14 is a cone shape with the apex pointing downwards.

[0030] With the above settings, the probe 14 causes less disturbance to the coolant when it is inserted downwards into the coolant.

[0031] The simulation testing device also includes several lifting seats 16, with probes 14 fixedly connected to the lower side of each lifting seat 16. The lifting device 15 is connected to the lifting seat 16 and is used to drive the lifting seat 16 to move up and down.

[0032] The lifting seat 16 is used to connect the probe 14. The lifting device 15 can sequentially control different lifting seats 16 to move downwards, that is, the lifting device 15 can sequentially control different probes 14 to move downwards for temperature measurement. Specifically, there are four lifting seats 16, and several probes 14 are fixedly connected to the lower side of each lifting seat 16. The four lifting seats 16 are named the first seat, the second seat, the third seat, and the fourth seat, respectively. The four lifting seats 16 can be raised and lowered individually by the lifting device 15 to measure the temperature of the corresponding measurement point of the coolant through the corresponding probe 14. See also Figure 6 Before the test, the first probe descends to measure the initial temperature of the coolant. This initial temperature can be used as the initial temperature for each measurement point. After the measurement is completed, the first probe moves upward, and probe 14 leaves the housing 11. After the test begins, the battery cell 13 is energized, the coolant absorbs the heat from the battery cell 13, and the condenser tube 12 cools the coolant, thus simulating the normal operation of the energy storage system. One hour later, an alternating measurement is performed. The specific steps of the alternating measurement are as follows: first, the first probe moves downward, measures and records the temperature at the corresponding measurement point, and after the measurement is completed, the first probe moves upward and leaves the housing 11; see [link to relevant documentation]. Figure 7 Then, in the same manner, the second probe moves downwards, measures and records the temperature at the corresponding measurement point, and after the measurement is completed, the second probe moves upwards and leaves the housing 11; the third probe moves downwards, measures and records the temperature at the corresponding measurement point, and after the measurement is completed, the third probe moves upwards and leaves the housing 11; the fourth probe moves downwards, measures and records the temperature at the corresponding measurement point, and after the measurement is completed, the fourth probe moves upwards and leaves the housing 11. Afterwards, an alternating measurement is performed every half hour, for a total of five alternating measurements. Through the above steps, several time-temperature discrete points are obtained for each measurement point. These discrete points are then fitted using a computer to obtain the time-temperature curve for each measurement point. By comparing the shape and similarity of the time-temperature curves for each measurement point, the temperature consistency at any time during the test can be determined. Based on the test results, the designed energy storage system can be optimized and adjusted. By using the alternating measurement method, the number of probes 14 entering the coolant each time is greatly reduced, which can effectively reduce the disturbance of the coolant by the probes 14, thereby improving the accuracy of the measurement.

[0033] The upper end of probe 14 is threadedly connected to the lifting seat 16.

[0034] The above settings facilitate the installation and replacement of probe 14.

[0035] The lifting device 15 includes a base 151 disposed above the housing 11. A downward-opening groove 1511 is provided on the lower side of the base 151. A plunger 161, slidably connected within the groove 1511, is fixedly connected to the upper side of the lifting seat 16. The base 151 has a horizontally extending rotating groove 1512. A rotating shaft 1513 is rotatably connected within the rotating groove 1512. The base 151 is equipped with a driving device 1514 for driving the rotating shaft 1513 to rotate along its axis. A first air passage 15131, extending along the axis of the rotating shaft 1513, is provided within the rotating shaft 1513. The first air passage 15131 is connected to an air pump 15132. The rotating groove 1511... A plurality of second air passages 15121 are provided on the lower side of 12. The second air passages 15121 are arranged sequentially along the extension direction of the rotating groove 1512. The number of second air passages 15121 and the number of sliding grooves 1511 are the same and correspond one-to-one with the sliding grooves 1511. The rotating groove 1512 and the sliding groove 1511 are connected through the second air passages 15121. A third air passage 15122 is provided on the upper side of each second air passage 15121. The third air passage 15122 is arranged on the rotating shaft 1513 and is connected to the first air passage 15131. When any second air passage 15121 is connected to the corresponding third air passage 15122, the other second air passages 15121 and the corresponding third air passages 15122 are staggered.

[0036] When the third air passage 15122 and the second air passage 15121 on the upper side of the first seat are connected, the third air passage 15122 and the second air passage 15121 on the upper side of the other lifting seats 16 are all staggered. The air pump 15132 supplies air to the slide groove 1511 of the first seat through the first air passage 15131, the third air passage 15122, and the second air passage 15121. At this time, the first seat will move downward under the action of air pressure; and when the air pump 15132 draws air outward, the first seat will move upward under the action of air pressure. Under the action of the drive device 1514, the rotating shaft 1513 rotates, the second air passage 15121 and the third air passage 15122 on the upper side of the first seat are staggered, while the second air passage 15121 and the third air passage 15122 on the upper side of the second seat are connected. At this time, the lifting and lowering of the second seat can be controlled by the air pump 15132. Similarly, the lifting and lowering of different lifting seats 16 can be controlled by switching the connection between different second air passages 15121 and third air passages 15122 through the drive device 1514. This application only requires one drive device 1514 and one air pump 15132 to control the lifting and lowering of multiple lifting seats 16, which is simple in structure and easy to maintain.

[0037] The rotating groove 1512 passes through both ends of the base 151, the driving device 1514 is a motor, and one end of the rotating shaft 1513 is connected to the motor.

[0038] The motor is readily available from the market, which facilitates the production and maintenance of this application.

[0039] A connector 15133 is provided at the end of the rotating shaft 1513 away from the motor. The connector 15133 and the rotating shaft 1513 are rotated and sealed. The air pump 15132 is connected to the first air passage 15131 through the connector 15133.

[0040] The connector 15133 and the base 151 are fixedly connected. When the rotating head and the rotating shaft 1513 rotate and seal, the air pump 15132 can pressurize or evacuate the first air passage 15131 through the connector 15133 when the rotating shaft 1513 rotates.

[0041] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A simulation test device for an immersed liquid-cooled energy storage system, characterized in that, The utility model provides a simulation test device of battery, including the shell is arranged with cooling liquid and the condenser pipe for cooling the cooling liquid in, the cooling liquid is immersed without a plurality of electric core, the upper side of shell is provided with a plurality of needle hole, the needle hole is provided with the sealing sheet for sealing the needle hole in, the sealing sheet is provided with the needle eye, the upper side of needle hole is provided with the probe for measuring cooling liquid temperature along the vertical extension, the simulation test device still includes the lifting device for lifting the probe, still include a plurality of lifting seat, the lower side of lifting seat is all fixedly connected with probe, lifting device and lifting seat are connected and are used for driving lifting seat to move up and down, lifting device includes the pedestal that sets up above shell, the lower side of pedestal is provided with the open downward sliding slot, the upper side of lifting seat is fixedly connected with the plunger that slides in sliding slot, pedestal is provided with the rotary groove that extends along the horizontal direction, rotary groove is rotatably connected with the rotating shaft in, pedestal is provided with the drive arrangement for driving rotating shaft rotates along the axis of rotating shaft, the first air channel that extends along the axis direction of rotating shaft is arranged in the rotating shaft, first air channel is communicated with air pump, the lower side of rotary groove is provided with a plurality of second air channels, second air channels are sequentially arranged along the extension direction of rotary groove, the number of second air channel and sliding slot is consistent and is one to one corresponding with sliding slot, rotary groove and sliding slot are communicated through second air channel, the upper side of second air channel is all provided with third air channel, third air channel sets up on rotating shaft and is communicated with first air channel, when any one second air channel and corresponding third air channel are communicated, other second air channels and corresponding third air channel are staggered.

2. The simulation test device for the submerged liquid-cooled energy storage system according to claim 1, wherein, The lower end of the probe is in the shape of a cone with the apex pointing downwards.

3. The simulation test device for the submerged liquid-cooled energy storage system according to claim 1, wherein, The upper end of the probe is threadedly connected with the lifting seat.

4. The simulation test device for the submerged liquid-cooled energy storage system according to claim 1, wherein, The rotary groove penetrates through both ends of the pedestal, and the drive device is a motor.

5. The simulation test device for the submerged liquid-cooled energy storage system according to claim 4, characterized in that, The end of the rotating shaft away from the motor is provided with a connecting head, the connecting head and the rotating shaft are rotationally sealed, and the air pump is communicated with the first air channel through the connecting head. The lower end of the probe is in the shape of a cone with the apex pointing downwards. The upper end of the probe is threadedly connected with the lifting seat. The rotary groove penetrates through both ends of the pedestal, and the drive device is a motor. The end of the rotating shaft away from the motor is provided with a connecting head, the connecting head and the rotating shaft are rotationally sealed, and the air pump is communicated with the first air channel through the connecting head.

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