Temperature control system for testing service life of high-magnification battery

Abstract

The invention discloses a temperature control system for testing the service life of a high-magnification battery, which comprises a liquid cooling assembly, a battery cooling testing device, a control computer (28) and a controller (1), the control computer (28) is connected with the controller (1), the high-magnification battery (14) is arranged in a battery placing area (15) of the battery cooling testing device, and the controller (1) is connected with the liquid cooling assembly. A temperature monitoring system is arranged on the battery cooling test device, a signal output end of the temperature monitoring system is connected with an I / O port of the controller (1), a control bus port of the controller (1) is connected with a control port of the liquid cooling equipment, and the liquid cooling assembly is correspondingly connected with the battery cooling test device. According to the invention, the temperature of the battery subjected to high-rate charging and discharging can be controlled, and the cycle life test of the battery is ensured to be continuously carried out.

Description

Technical Field

[0001] The invention relates to a temperature control system suitable for battery testing, in particular to a temperature control system used for high-rate battery life testing. Background Art

[0002] With the support of national policies for many years, the new energy battery industry has developed rapidly. With the development of the battery industry, batteries with high-rate charge and discharge performance have attracted a large market development space. High-rate batteries can significantly reduce charging time, improve the utilization rate of charging equipment, and improve the grid regulation capacity of energy storage systems. However, the current battery standards evaluate battery life at low rates and cannot be applied to high-rate battery cycle life evaluation. This is mainly because continuous high-rate charging and discharging of the battery during the test will significantly increase the battery temperature, affecting the existing battery cycle life and failing to correctly evaluate the battery. Therefore, it is necessary to develop a temperature control system to control the battery temperature so that the battery can continue to charge and discharge at high rates to meet the requirements of cycle life testing. Summary of the invention

[0003] The present invention provides a temperature control system for high-rate battery life test, which can control the temperature of a battery performing high-rate charge and discharge, and ensure the continuous performance of the battery cycle life test.

[0004] The present invention adopts the following technical scheme: a temperature control system for high-rate battery life testing, which includes a liquid cooling assembly, a battery cooling test device, a control computer and a controller. The high-rate battery is installed in the battery placement area of ​​the battery cooling test device, the control computer is connected to the controller, a temperature monitoring system is provided on the battery cooling test device, the signal output end of the temperature monitoring system is connected to the I / O port of the controller, the control bus port of the controller is connected to the control port of the liquid cooling device, and the liquid cooling assembly is connected to the battery cooling test device accordingly.

[0005] Furthermore, the present invention also includes a dehumidifier, a humidity sensor is provided near the battery cooling test device, a signal output end of the humidity sensor is connected to the I / O port of the controller through a signal harness, and the control bus port of the controller is connected to the control port of the dehumidifier through a CAN communication bus I.

[0006] Further, the battery cooling test device described in the present invention includes a cooling fastening plate I and a cooling fastening plate II, a cooling water chamber I is provided inside the cooling fastening plate I and a cooling water chamber II is provided inside the cooling fastening plate II, a water inlet I and a water outlet I are provided at one end of the cooling fastening plate I, both the water inlet I and the water outlet I are communicated with the liquid cooling pipeline inside the cooling water chamber I, a water inlet II and a water outlet II are also provided at one end of the cooling fastening plate II, both the water inlet II and the water outlet II are communicated with the liquid cooling pipeline inside the cooling water chamber II, a high-rate battery is placed in a battery placement area formed between the cooling fastening plate I and the cooling fastening plate II, and after the cooling fastening plate I and the cooling fastening plate II are tightened by a fastening device, the high-rate battery is clamped and fixed, and the temperature monitoring system includes a temperature sensor I, a temperature sensor II and a temperature sensor III, and the temperature sensor I and the temperature sensor II are respectively installed in the cooling The temperature sensor III is installed on the clamping plate I and the cooling clamping plate II, and the temperature sensor III is installed on the high-rate battery. The temperature sensor I, the temperature sensor II and the temperature sensor III are all connected to the I / O port of the controller through the signal harness. The liquid cooling assembly includes a water inlet tank, a chiller and a drain pump. The control bus port of the controller is respectively connected to the control port of the chiller and the control port of the drain pump through the CAN communication bus II. The water outlet I of the cooling fastening plate I and the water outlet II of the cooling fastening plate II are connected to the water inlet of the water inlet tank through a pipeline, the water outlet of the water inlet tank is connected to the water inlet of the chiller, the water outlet of the chiller is connected to the inlet of the drain pump, and the outlet of the drain pump is divided into branch I and branch II. The outlet of the drain pump is connected to the water inlet I of the cooling fastening plate I through branch I, and the outlet of the drain pump is connected to the water inlet II of the cooling fastening plate II through branch II.

[0007] Furthermore, the branch I described in the present invention is provided with a solenoid valve I, the branch II is also provided with a solenoid valve II, and the control bus port of the controller is also connected to the solenoid valve I and the solenoid valve II.

[0008] Furthermore, the water inlet tank and the drainage pump described in the present invention are both connected to a heating device, the heating device is configured as an electric heater, the controller of the electric heater is connected to the control bus port of the controller, and the heating rod of the electric heater is respectively connected to the water inlet tank and the drainage pump.

[0009] Furthermore, the outer surfaces of the cooling fastening plates I and II described in the present invention are vertically distributed with a plurality of condensation water guide strips, and each condensation water guide strip is installed from top to bottom on the outer surfaces of the cooling fastening plates I and II.

[0010] The present invention has the following beneficial effects: after adopting the above technical scheme, the present invention adopts a liquid cooling assembly, a battery cooling test device, a control computer and a controller, so that the battery system is cooled according to the detected battery system temperature, not only realizing automatic control and rapid cooling, but also controlling the temperature fluctuation range of the battery for high-rate charge and discharge, realizing continuous detection of the battery cycle life, providing a basis for the life evaluation of the high-rate charge and discharge battery, and ensuring the continuous battery cycle life test. The liquid cooling assembly adopted by the present invention includes a water inlet tank, a chiller and a drainage pump, which not only has a large refrigeration capacity and a long life, but also has a relatively low refrigeration cost, does not require complex refrigeration equipment and materials, and has a high cost performance. The battery cooling test device of the present invention realizes automatic adjustment of the battery temperature through a controller, controls the temperature fluctuation during the battery test, realizes the collection of battery temperature information, cooling fastening plate temperature information, humidity information, and cooling equipment information, and when it is found that the battery temperature is low or high, the battery cooling test device is started to cool or heated by the heating device, thereby adjusting the cooling or heating capacity and flow rate to adjust the cooling and heating effects. The present invention adopts an electromagnetic valve to control the flow of cooling water to achieve the cooling adjustment effect. The present invention can also start a dehumidifier to dehumidify the test environment when the humidity is high. Condensate guide strips are vertically distributed on the outer surfaces of the cooling fastening plate I and the cooling fastening plate II of the present invention, and each condensate guide strip is installed from top to bottom on the outer surface of the cooling fastening plate I and the cooling fastening plate II, so that condensed water can be prevented from affecting the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0012] Figure 1 It is a schematic diagram of the structure of the present invention.

[0013] Figure 2 It is a system block diagram of the present invention. DETAILED DESCRIPTION

[0014] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0015] exist Figure 1 and Figure 2The present invention provides a temperature control system for high-rate battery life testing, which includes a liquid cooling assembly, a battery cooling test device, a control computer 28 and a controller 1. The high-rate battery 14 is installed in a battery placement area 15 of the battery cooling test device. The control computer 28 is connected to the controller 1. A temperature monitoring system is provided on the battery cooling test device. The signal output end of the temperature monitoring system is connected to the I / O port of the controller 1. The control bus port of the controller 1 is connected to the control port of the liquid cooling device. The liquid cooling assembly is connected to the battery cooling test device accordingly.The temperature control system for high-rate battery life test used in this embodiment also includes a dehumidifier 2. A humidity sensor 3 is provided near the battery cooling test device. The signal output end of the humidity sensor 3 is connected to the I / O port of the controller 1 through a signal harness. The control bus port of the controller 1 is connected to the control port 4 of the dehumidifier 2 through a CAN communication bus Ⅰ5. The battery cooling test device used in this embodiment includes a cooling fastening plate Ⅰ6 and a cooling fastening plate Ⅱ7. A cooling water chamber Ⅰ8 is provided inside the cooling fastening plate Ⅰ6 and a cooling water chamber Ⅱ9 is provided inside the cooling fastening plate Ⅱ7. One end of the fixing plate Ⅰ6 is provided with a water inlet Ⅰ10 and a water outlet Ⅰ11, and the water inlet Ⅰ10 and the water outlet Ⅰ11 are both communicated with the liquid cooling pipeline inside the cooling water chamber Ⅰ8. One end of the cooling fastening plate Ⅱ7 is also provided with a water inlet Ⅱ12 and a water outlet Ⅱ13, and the water inlet Ⅱ12 and the water outlet Ⅱ13 are both communicated with the liquid cooling pipeline inside the cooling water chamber Ⅱ9. The high-rate battery 14 is placed in the battery placement area 15 formed between the cooling fastening plate Ⅰ6 and the cooling fastening plate Ⅱ7, and the cooling fastening plate Ⅰ6 and the cooling fastening plate Ⅱ7 are tightened by the fastening device, so that the high-rate battery 14 is clamped and fixed, and the temperature monitoring The system includes a temperature sensor Ⅰ16, a temperature sensor Ⅱ17 and a temperature sensor Ⅲ18, wherein the temperature sensor Ⅰ16 and the temperature sensor Ⅱ17 are respectively mounted on the cooling clamping plate Ⅰ6 and the cooling clamping plate Ⅱ7, and the temperature sensor Ⅲ18 is mounted on the high-rate battery 15. The temperature sensor Ⅰ16, the temperature sensor Ⅱ17 and the temperature sensor Ⅲ18 are all connected to the I / O port of the controller 1 through a signal harness. The liquid cooling assembly includes a water inlet tank 19, a chiller 20 and a drainage pump 21. The control bus port of the controller 1 is respectively connected to the chiller 20 through a CAN communication bus Ⅱ22. The control port of the drain pump 21 is connected, the water outlet Ⅰ11 of the cooling fastening plate Ⅰ6 and the water outlet Ⅱ13 of the cooling fastening plate Ⅱ7 are connected with the water inlet of the water inlet tank 19 through a pipeline, the water outlet of the water inlet tank 19 is connected with the water inlet 20 of the chiller, the water outlet of the chiller 20 is connected with the inlet of the drain pump 21, the outlet of the drain pump 21 is divided into branch Ⅰ29 and branch Ⅱ23, the outlet of the drain pump 21 is connected with the water inlet Ⅰ of the cooling fastening plate Ⅰ6 through the branch Ⅰ29, and the outlet of the drain pump 21 is connected with the water inlet Ⅱ of the cooling fastening plate Ⅱ7 through the branch Ⅱ23.In this embodiment, a solenoid valve I24 is provided on branch I29, and a solenoid valve II25 is also provided on branch II23. The control bus port of the controller 1 is also connected to the solenoid valve I24 and the solenoid valve II25. The water inlet tank 19 and the drainage pump 21 of this embodiment are both connected to the heating device, and the heating device is set to an electric heater 26. The controller of the electric heater 26 is connected to the control bus port of the controller 1, and the heating rod of the electric heater 26 is respectively connected to the water inlet tank 19 and the drainage pump 12. In this embodiment, a plurality of condensation water guide strips 27 are vertically distributed on the outer surface of the cooling fastening plate I6 and the cooling fastening plate II7. In the optimal solution, two condensation water guide strips 27 are vertically distributed on the outer surface of the cooling fastening plate I6 and the cooling fastening plate II7. The two condensation water guide strips 27 are symmetrically arranged, and each condensation water guide strip 27 is installed from top to bottom on the outer surface of the cooling fastening plate I6 and the cooling fastening plate II7, so as to prevent condensation water from affecting the test results.

[0016] In the present invention, when the water inlet tank 19 and the water discharged by the drainage pump need to be heated, the electric heater 26 of the heating device can be used to heat the water, thereby achieving temperature heating. When the temperature sensor III 18 detects that the temperature of the high-rate battery 15 is relatively high, and sends the detected temperature to the controller 1, the controller 1 starts the drainage pump 12 and simultaneously starts the solenoid valve I 24 and the solenoid valve II 25 to open, and the cooling water in the chiller 20 is pumped into the cooling water chamber I 8 and the cooling water chamber II 9 through the drainage pump 12, so that the high-rate battery 15 can be cooled by the cooling water. During the cooling process, the controller can also control the switching amount of the solenoid valve I 24 and the solenoid valve II 25 to adjust the cooling capacity of the chiller 20 and the speed of the liquid flow in real time, and feedback the state of the cooling equipment to the controller 1. When the temperature sensor Ⅰ16 and the temperature sensor Ⅱ17 detect that the cooling water chamber Ⅰ8 and the cooling water chamber Ⅱ9 are unable to be cooled after the temperature rises, the controller 1 turns off the drainage pump 12, and opens the outlet Ⅰ11 of the cooling fastening plate Ⅰ6 and the outlet Ⅱ13 of the cooling fastening plate Ⅱ7, and discharges the used cooling water into the water inlet tank 19 for repeated recycling. When the humidity sensor 3 detects that the humidity in the environment is high, it can also send a humidity signal to the controller, and the controller starts the dehumidifier 2 to perform the dehumidification operation. The heating device used in the present invention is selected according to the needs of the user. The present invention can also analyze the cooling and heating action status and effect according to the collected data information, and adjust the output power and flow rate of the cold machine equipment in time.

[0017] Without limitation to this, any changes or substitutions that are not conceived through creative work should be covered within the protection scope of the present invention patent. Therefore, the protection scope of the present invention patent should be based on the protection scope defined in the claims.

Claims

1. A temperature control system for high rate battery life testing, characterized in that: The invention comprises a liquid cooling assembly, a battery cooling test device, a control computer (28) and a controller (1), wherein the control computer (28) is connected to the controller (1), a high-rate battery (14) is installed in a battery placement area (15) of the battery cooling test device, a temperature monitoring system is provided on the battery cooling test device, a signal output end of the temperature monitoring system is connected to an I / O port of the controller (1), a control bus port of the controller (1) is connected to a control port of the liquid cooling device, and the liquid cooling assembly is connected to the battery cooling test device accordingly.

2. The temperature control system for high rate battery life test according to claim 1, characterized in that: It also includes a dehumidifier (2), a humidity sensor (3) is provided near the battery cooling test device, a signal output end of the humidity sensor (3) is connected to an I / O port of a controller (1) via a signal harness, and a control bus port of the controller (1) is connected to a control port (4) of the dehumidifier (2) via a CAN communication bus I (5).

3. The temperature control system for high rate battery life test according to claim 1 or 2, characterized in that: The battery cooling test device comprises a cooling fastening plate I (6) and a cooling fastening plate II (7), wherein a cooling water chamber I (8) is provided inside the cooling fastening plate I (6) and a cooling water chamber II (9) is provided inside the cooling fastening plate II (7), a water inlet I (10) and a water outlet I (11) are provided at one end of the cooling fastening plate I (6), and both the water inlet I (10) and the water outlet I (11) are communicated with a liquid cooling pipeline inside the cooling water chamber I (8), and a water inlet II (12) and a water outlet II (13) are also provided at one end of the cooling fastening plate II (7), and the water inlet II (12) and the water outlet II (13) are communicated with a liquid cooling pipeline inside the cooling water chamber I (8). ) are connected to the liquid cooling pipeline inside the cooling water chamber II (9), the high-rate battery (14) is placed in the battery placement area (15) formed between the cooling fastening plate I (6) and the cooling fastening plate II (7), and the cooling fastening plate I (6) and the cooling fastening plate II (7) are tightened by the fastening device to clamp the high-rate battery (14). The temperature monitoring system includes a temperature sensor I (16), a temperature sensor II (17) and a temperature sensor III (18), and the temperature sensor I (16) and the temperature sensor II (17) are respectively installed on the cooling clamping plate I (6) and the cooling clamping plate The temperature sensor III (18) is mounted on the fastening plate II (7), the temperature sensor III (18) is mounted on the high-rate battery (15), the temperature sensor I (16), the temperature sensor II (17) and the temperature sensor III (18) are all connected to the I / O port of the controller (1) through a signal harness, the liquid cooling assembly includes a water inlet tank (19), a chiller (20) and a drainage pump (21), the control bus port of the controller (1) is connected to the control port of the chiller (20) and the control port of the drainage pump (21) through a CAN communication bus II (22), and the water outlet I (11) of the cooling fastening plate I (6) is connected to the control port of the chiller (20) and the control port of the drainage pump (21). ) and the water outlet II (13) of the cooling fastening plate II (7) are connected to the water inlet of the water inlet box (19) through a pipeline, the water outlet of the water inlet box (19) is connected to the water inlet of the chiller (20), the water outlet of the chiller (20) is connected to the inlet of the drainage pump (21), the outlet of the drainage pump (21) is divided into branch I (29) and branch II (23), the outlet of the drainage pump (21) is connected to the water inlet I of the cooling fastening plate I (6) through branch I (29), and the outlet of the drainage pump (21) is connected to the water inlet II of the cooling fastening plate II (7) through branch II (23).

4. The temperature control system for high rate battery life test according to claim 3, characterized in that: The branch I (29) is provided with a solenoid valve I (24), the branch II (23) is also provided with a solenoid valve II (25), and the control bus port of the controller (1) is also connected to the solenoid valve I (24) and the solenoid valve II (25).

5. The temperature control system for high rate battery life test according to claim 3, characterized in that: The water inlet tank (19) and the drainage pump (21) are both connected to a heating device, the heating device is configured as an electric heater (26), a controller of the electric heater (26) is connected to a control bus port of the controller (1), and a heating rod of the electric heater (26) is respectively connected to the water inlet tank (19) and the drainage pump (12).

6. The temperature control system for high rate battery life test according to claim 3, characterized in that: A plurality of condensation water guide strips (27) are vertically distributed on the outer surfaces of the cooling fastening plate I (6) and the cooling fastening plate II (7), and each condensation water guide strip (27) is installed from top to bottom on the outer surfaces of the cooling fastening plate I (6) and the cooling fastening plate II (7).

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