CN121164956A - Battery pack liquid cooling plate circulating pressure testing system and method - Google Patents
Battery pack liquid cooling plate circulating pressure testing system and methodInfo
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- CN121164956A CN121164956A CN202511085720.7A CN202511085720A CN121164956A CN 121164956 A CN121164956 A CN 121164956A CN 202511085720 A CN202511085720 A CN 202511085720A CN 121164956 A CN121164956 A CN 121164956A
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Abstract
本发明提供一种电池包液冷板循环压力测试系统及方法，测试系统包括：充放电测试仪，用于对动力电池包进行充放电；动力电池包，包括电池模组、液冷板、电池管理模块、第一压力传感器和第二压力传感器，液冷板设有第一进液口和第一出液口，第一压力传感器靠近第一进液口设置，第二压力传感器靠近第一出液口设置，第一压力传感器和第二压力传感器均与电池管理模块通讯连接；压力输出设备，用于向液冷板提供多种压力值的循环液并接收来自液冷板的回液，设有第二进液口和第二出液口，第二出液口与第一进液口连通，第一出液口与第二进液口连通；工控机，用于接收电池管理模块获取的数据。本发明可提升液冷板使用安全性和可靠性。
This invention provides a battery pack liquid-cooled plate cyclic pressure testing system and method. The testing system includes: a charge/discharge tester for charging and discharging a power battery pack; a power battery pack including a battery module, a liquid-cooled plate, a battery management module, a first pressure sensor, and a second pressure sensor; the liquid-cooled plate has a first inlet and a first outlet, the first pressure sensor is positioned near the first inlet, and the second pressure sensor is positioned near the first outlet; both the first and second pressure sensors are communicatively connected to the battery management module; a pressure output device for providing circulating liquid with various pressure values to the liquid-cooled plate and receiving return liquid from the liquid-cooled plate, having a second inlet and a second outlet, the second outlet being connected to the first inlet, and the first outlet being connected to the second inlet; and an industrial control computer for receiving data acquired by the battery management module. This invention can improve the safety and reliability of the liquid-cooled plate.
Description
Technical Field
The invention relates to the technical field of power batteries of new energy automobiles, in particular to a system and a method for testing the circulating pressure of a liquid cooling plate of a battery pack.
Background
Along with the development of new energy automobiles to high energy density and ultra-fast charging, the requirements of the battery pack on the refrigeration of a liquid cooling system are becoming severe, and the refrigeration effect has a close relationship with the liquid pressure in the liquid cooling plate. The liquid cooling plate is an indispensable component in the liquid cooling system of the battery pack of the electric automobile. In the charge and discharge working process of the battery pack, heat generated by the battery is directly contacted with the surface of the liquid cooling plate through the battery module and then is taken away by low-temperature circulating liquid in the liquid cooling plate. The liquid cooling plate is used as a heat management core heat dissipation component, and the pressure test technology of the liquid cooling plate synchronously goes through the process of continuously updating and iterating. The battery pack liquid cooling plate is selected from materials, so that the waterproof performance is considered, and the pressure impact durability is also important. In order to ensure the reliability of the liquid cooling plate in actual use, the liquid cooling plate needs to be subjected to strict pressure alternating cycle test before being put into use.
However, in the related art, researches on the liquid cooling plate of the battery pack are mostly focused on the researches on the temperature, the flow rate or the flow resistance of the liquid in the liquid cooling plate so as to judge the influence of flow change on heat dissipation of the battery pack and detect the heat dissipation performance or the sealing performance of the liquid cooling plate, and researches on the impact on the inner wall of the liquid cooling plate caused by continuous change of the liquid pressure in the liquid cooling plate due to road condition change in real vehicle operation have few findings, and the liquid cooling plate is subjected to different pressure impacts to have certain influence on the safety of the liquid cooling plate, so that the researches on the impact durability of the liquid cooling plate by circulating liquid with different pressures have important practical significance.
Disclosure of Invention
The invention provides a system and a method for testing the circulating pressure of a liquid cooling plate of a battery pack, which are used for solving the defects that the prior art is limited to researching the heat dissipation performance or the sealing performance of the liquid cooling plate and lacks research on the impact durability of the liquid cooling plate, realizing the research on the safety of the circulating impact of the liquid cooling plate under different liquid pressures in a charging and discharging mode on the premise of simulating the actual running condition of a vehicle, providing an optimized reference for the research and development and manufacturing stages of the liquid cooling plate, and improving the safety and reliability of the liquid cooling plate after the liquid cooling plate is put into use.
The invention provides a battery pack liquid cooling plate circulating pressure test system, which comprises:
the charge-discharge tester is used for simulating the charge-discharge working condition of the new energy automobile and charging and discharging the power battery pack;
The power battery pack comprises a battery module, a liquid cooling plate, a battery management module, a first pressure sensor and a second pressure sensor, wherein the liquid cooling plate is provided with a first liquid inlet and a first liquid outlet, the first pressure sensor is arranged close to the first liquid inlet, the second pressure sensor is arranged close to the first liquid outlet, and the first pressure sensor and the second pressure sensor are both in communication connection with the battery management module;
The pressure output device is used for providing circulating liquid with various pressure values for the liquid cooling plate and receiving liquid return from the liquid cooling plate, and is provided with a second liquid inlet and a second liquid outlet, wherein the second liquid outlet is communicated with the first liquid inlet, and the first liquid outlet is communicated with the second liquid inlet;
And the industrial personal computer is in communication connection with the battery management module and is used for receiving the data acquired by the battery management module.
The battery pack liquid cooling plate circulating pressure testing system provided by the invention further comprises a pressure control cabinet which is in communication connection with the industrial personal computer and the pressure output equipment, wherein the pressure control cabinet is used for transmitting pressure values with different waveforms to the pressure output equipment.
The battery pack liquid cooling plate circulating pressure testing system provided by the invention further comprises alarm equipment, wherein the pressure control cabinet is used for receiving an alarm instruction from the industrial personal computer and controlling the alarm equipment to work.
According to the battery pack liquid cooling plate circulating pressure testing system provided by the invention, the alarm equipment comprises at least one of an alarm lamp and a buzzer.
According to the battery pack liquid cooling plate circulating pressure testing system provided by the invention, the pressure output equipment comprises a pressure pump set, a refrigerating unit and a water tank for storing circulating liquid, and the pressure output equipment is used for providing the circulating liquid with corresponding pressure for the liquid cooling plate through the pressure pump set according to the instruction of the pressure control cabinet.
The invention also provides a battery pack liquid cooling plate circulating pressure testing method, which uses the battery pack liquid cooling plate circulating pressure testing system and comprises the following steps:
Charging and discharging the power battery pack through the charging and discharging tester;
Circulating liquid with different pressures corresponding to different road conditions is introduced into the liquid cooling plate through the pressure output equipment;
And acquiring liquid pressure data detected by the first pressure sensor and the second pressure sensor, and providing a control strategy according to the liquid pressure data.
According to the method for testing the circulating pressure of the liquid cooling plate of the battery pack, which is provided by the invention, the step of providing a control strategy according to the liquid pressure data comprises the following steps:
and when the acquired liquid pressure data is in the first-stage range, the industrial personal computer sends out a warning indication.
According to the method for testing the circulating pressure of the liquid cooling plate of the battery pack, which is provided by the invention, the step of providing a control strategy according to the liquid pressure data comprises the following steps:
And when the acquired liquid pressure data is in the second-stage range, the industrial personal computer controls the alarm equipment to alarm.
The battery pack liquid cooling plate circulating pressure testing method provided by the invention further comprises the step that the industrial personal computer cuts off the charge and discharge actions of the charge and discharge tester on the power battery pack, and stops charging and discharging the power battery pack.
According to the battery pack liquid cooling plate circulating pressure testing method provided by the invention, the industrial personal computer controls the alarm equipment to alarm, and the method specifically comprises the following steps:
the industrial personal computer controls at least one alarm with sound effect or light effect to alarm.
According to the battery pack liquid cooling plate circulating pressure testing system and method, the power battery pack is charged and discharged through the charging and discharging tester, the actual running condition of a vehicle can be simulated, the battery pack liquid cooling plate circulating pressure testing system and method are more suitable for the use condition of a new energy vehicle in actual road conditions than the static (non-charging and discharging) liquid cooling plate single pressure testing based on the charging and discharging mode, testing accuracy and reliability can be improved, various waveform circulating pressures are tested on the liquid cooling plate, the conditions of various pressure liquid impacts suffered by the battery pack in actual use by the liquid cooling plate are covered, the impact effect of various pressures can be tested on the liquid cooling plate in the research and development stage, the safety of drivers and passengers and vehicles is guaranteed, the safety of the liquid cooling plate is improved, the liquid pressure of the liquid cooling plate is monitored in real time, the pressure data value is transmitted to an industrial personal computer, and once the pressure value suddenly changes and exceeds a preset range, processing such as alarming can be timely carried out, so that operators can be prompted to conduct timely processing, and risks of accidents are reduced.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a simplified schematic structure diagram of a battery pack liquid cooling plate circulation pressure test system provided by the invention.
Fig. 2 is a schematic flow chart of a method for testing the circulating pressure of a liquid cooling plate of a battery pack.
Reference numerals:
10. The device comprises a charge and discharge tester, 11, a power battery pack, 12, a battery module, 13, a liquid cooling plate, 14, a battery management module, 15, a first pressure sensor, 16, a second pressure sensor, 17, a first liquid inlet, 18, a first liquid outlet, 19, a pressure output device, 20, a second liquid inlet, 21, a second liquid outlet, 22, an industrial personal computer, 23, a positive cable, 24, a negative cable, 25, a first communication line, 26, a second communication line, 27, a third communication line, 28, a liquid inlet pipe, 29, a liquid outlet pipe, 30, a CAN communication interface, 31, a fourth communication line, 32, a pressure control cabinet, 33, a pressure data file, 34, a fifth communication line, 35, a sixth communication line, 36, a seventh communication line, 37, a warning lamp, 38 and a buzzer.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the terms "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, or in communication, directly connected, or indirectly connected via an intervening medium, or in communication between two elements or in an interaction relationship between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
During actual driving of the vehicle, different types of road conditions and traffic flows can lead to continuous charging and discharging of the vehicle-mounted power battery pack, which can lead to rapid rise of the temperature of the battery in the battery pack. In order to ensure safety, the liquid cooling plate is required to provide low-temperature liquid with certain pressure and temperature to timely take away heat. However, due to the change of the actual road conditions, the heat generated by the battery pack is continuously changed, and the internal liquid pressure of the liquid cooling plate is further continuously changed. The pressure change condition tends to cause certain pressure waveform impact on the liquid cooling plate, so that the influence of the actual pressure condition on the strength and the tightness of the liquid cooling plate needs to be simulated.
As shown in fig. 1, the present invention provides a battery pack liquid cooling plate circulation pressure test system, comprising:
The charge and discharge tester 10 is used for simulating the charge and discharge working conditions of the new energy automobile and for charging and discharging the power battery pack 11;
The power battery pack 11, the power battery pack 11 comprises a battery module 12, a liquid cooling plate 13, a battery management module 14, a first pressure sensor 15 and a second pressure sensor 16, wherein the liquid cooling plate 13 is provided with a first liquid inlet 17 and a first liquid outlet 18, the first pressure sensor 15 is arranged close to the first liquid inlet 17, the second pressure sensor 16 is arranged close to the first liquid outlet 18, and the first pressure sensor 15 and the second pressure sensor 16 are both in communication connection with the battery management module 14;
a pressure output device 19, configured to provide a circulating liquid with various pressure values to the liquid cooling plate 13 and receive a return liquid from the liquid cooling plate 13, where the pressure output device 19 is provided with a second liquid inlet 20 and a second liquid outlet 21, the second liquid outlet 21 is communicated with the first liquid inlet 17, and the first liquid outlet 18 is communicated with the second liquid inlet 20;
The industrial personal computer 22 is communicatively connected to the battery management module 14, and is configured to receive data acquired by the battery management module 14.
According to the battery pack liquid cooling plate circulating pressure testing system, the charge-discharge tester 10 is connected with the positive electrode and the negative electrode of the power battery pack 11 through the positive electrode cable 23 and the negative electrode cable 24 and is used for charging and discharging the power battery pack 11 so as to simulate the processes of acceleration (discharging) and deceleration or braking (charging and energy recovery) of the vehicle when the vehicle runs under actual road conditions. The specific charging or discharging action is controlled by a program instruction in the upper computer software of the industrial personal computer 22, and the charging and discharging tester 10 is connected with the industrial personal computer 22 through CAN communication.
The power battery pack 11 is a vehicle-mounted battery pack for new energy automobiles, is a to-be-tested sample, and comprises a battery module 12, wherein the battery module is formed by combining a plurality of battery monomers in different serial-parallel connection modes, and the liquid cooling plate 13 is generally arranged at the bottom of a battery pack box body and mainly used for receiving cooling liquid with different pressures from liquid cooling equipment to cool each battery monomer of the battery module 12 in the battery pack. The liquid cooling panel 13 is also subjected to constant impact from the liquid pressure during operation of the vehicle. The battery management module 14, i.e., the BMS, is mainly responsible for monitoring and managing the battery energy storage unit, and ensuring the safe use of the battery during the charge and discharge processes. The main functions of the BMS include measurement of battery terminal voltage, energy balance among unit cells, estimation of state of charge and state of health, limitation of power input and output, control of a charging curve, isolation of a battery pack from a load, and the like. The battery management module 14 is configured to monitor parameters such as temperature, voltage, current, equilibrium state of the battery module 12, and temperature and pressure of the liquid in the liquid cooling plate 13, and transmit these data to the host computer software of the industrial personal computer 22 in real time through the CAN communication line, and through intelligent management of each battery cell in the battery module 12, the situation of overcharge, overdischarge, or over-temperature of the battery cell CAN be prevented, so as to prolong the service life of the power battery pack 11, and improve the use safety thereof. As shown in fig. 1, the battery management module 14 is connected with the battery module 12 through a first communication line 25, the first pressure sensor 15 is connected with the battery management module 14 through a second communication line 26, the second pressure sensor 16 is connected with the battery management module 14 through a third communication line 27, and the first pressure sensor 15 and the second pressure sensor 16 are used for transmitting detected real-time pressure data in the liquid cooling plate 13 to the battery management module 14 so as to judge whether the pressure value of circulating liquid in the liquid cooling plate 13 is in a normal range or not.
The purpose of the liquid cooling plate 13 is to take away the heat generated by the battery module 12 in the charge and discharge process, so as to ensure that the highest temperature and the lowest temperature of the battery module 12 are both in a reasonable temperature range for battery operation. The liquid cooling plate 13 is provided with a certain circulation flow channel, and can take away heat by introducing circulation liquid (such as mixed liquid of glycol and water), thereby achieving the purpose of reducing the temperature of the battery module 12. The liquid cooling plate 13 is provided with a first liquid inlet 17 and a first liquid outlet 18, the first liquid inlet 17 and the second liquid outlet 21 are connected through a liquid inlet pipe 28, the first liquid outlet 18 and the second liquid inlet 20 are connected through a liquid outlet pipe 29, the pressure output device 19 is used for feeding circulating liquid with different pressures into the liquid cooling plate 13 through the second liquid outlet 21, the liquid inlet pipe 28 and the first liquid inlet 17, and after the circulating liquid with pressure circulates in the liquid cooling plate 13, heat with the battery module 12 returns to a water tank of the pressure output device 19 from the first liquid outlet 18, the liquid outlet pipe 29 and the second liquid inlet 20.
The industrial personal computer 22 is provided with upper computer software, various charge and discharge test programs CAN be compiled through the upper computer software, and data such as voltage, current and temperature of the battery module 12 and pressure data of the liquid cooling plate 13, which are related to the battery module 14, are received through the CAN communication interface 30 and the fourth communication line 31.
The invention not only focuses on the different waveform modes of simulating the internal pressure of the liquid cooling plate 13 in the daily new energy vehicle operation, but also simulates and restores the operation change condition of the internal pressure of the liquid cooling plate 13 of the vehicle in the battery pack charge-discharge mode in actual operation of the new energy vehicle based on the test of the liquid pressure of the battery pack in the charge-discharge mode, so as to provide more effective and real pressure data of the liquid cooling plate 13.
As a preferred embodiment of the invention, the battery pack liquid cooling plate circulation pressure testing system further comprises a pressure control cabinet 32 which is in communication connection with the industrial personal computer 22 and the pressure output device 19, wherein the pressure control cabinet 32 is used for transmitting pressure values with different waveforms to the pressure output device 19.
As shown in fig. 1, the battery pack liquid cooling plate circulation pressure test system further includes a pressure data file 33, which stores various waveforms and pressure data corresponding to time, and the waveforms of different pressures include built-in waveforms, such as sine waves, cosine waves, square waves, triangular waves, pulse waves, saw-tooth waves, mixed waves, etc., and the user can also import custom waveforms edited by himself, so as to meet the pressure test requirements of various waveforms of the user. The pressure control cabinet 32 is connected to the pressure data file 33 via a fifth communication line 34, to the pressure output device 19 via a sixth communication line 35, and to the industrial personal computer 22 via a seventh communication line 36, for receiving data from the pressure data file 33 and for transmitting pressure waveform data to the pressure output device 19. The upper computer software of the industrial personal computer 22 can send start and stop commands of the pressure liquids with different waveforms to the pressure control cabinet 32 through the seventh communication line 36, and record various pressure data from the pressure control cabinet 32 through the seventh communication line 36. The upper computer software is installed on the industrial personal computer 22, and the industrial personal computer 22 is mainly used for communicating with the battery management module 14 of the battery pack and transmitting data such as voltage, current and temperature of the battery pack to the upper computer software. The upper computer software can not only write different testing programs according to the demands of users and control other accessory equipment in linkage communication with the upper computer software to start and stop and the like, but also can receive various battery parameter data from the battery pack and record the data.
Further, the battery pack liquid cooling plate circulation pressure testing system further comprises an alarm device, and the pressure control cabinet 32 is used for receiving an alarm instruction from the industrial personal computer 22 and controlling the alarm device to work.
According to the invention, a set of pressure monitoring and alarming system is designed in consideration of the condition that pressure fluctuation in the liquid cooling plate 13 possibly occurs in actual running of a vehicle, so that the running safety of a new energy automobile is improved, and the condition that the liquid cooling plate 13 leaks due to the pressure abnormality in the running process, so that the cooling liquid flows into a battery pack to cause short circuit, fire or even explosion is avoided. The pressure monitoring and alarming design of the invention not only can improve the working safety of the liquid cooling plate 13, but also can ensure the safety of a battery pack, a vehicle and drivers and passengers.
By setting the alarm device, when the pressure value detected by the first pressure sensor 15 and/or the second pressure sensor 16 is abnormal and is in a preset abnormal range, the industrial personal computer 22 sends an alarm command to the pressure control cabinet 32 through the upper computer software so as to trigger the alarm device on the pressure output device 19 to work, and the on-site operator can be prompted to timely process, so that the safety of personnel and a test platform is ensured.
Further, the alarm device includes at least one of an alarm lamp 37 and a buzzer 38, the alarm lamp 37 provides a visual alarm effect, the buzzer 38 provides an audible alarm effect, the alarm lamp 37 can use a multi-color alarm lamp 37, for example, different colors can be used for distinguishing pressure abnormality grades, for example, when the alarm lamp 37 flashes a yellow lamp, an early warning state indicating that the pressure fluctuation reaches 1 P+/-0.2P is displayed, when the alarm lamp 37 flashes a red lamp, an emergency warning state indicating that the pressure fluctuation reaches 1 P+/-0.5P is displayed, and a field person can perform corresponding treatment according to the pressure abnormality grades. The generation of the light signal by the alarm lamp 37 is advantageous in providing a reliable alarm signal in a noisy environment, enabling the operator to react in time and take effective countermeasures. The buzzer 38 is beneficial to breaking through the limitation of visual attention, reminding the operator of abnormality through special sound effect, and facilitating the operator to quickly react. Buzzing alarm can also provide different effects, for example, intermittent buzzing indicates that the pressure fluctuation reaches an early warning state, continuous high-frequency buzzing indicates that the pressure fluctuation reaches an emergency warning state, and operators can perform different treatments according to actual conditions. Wherein, different types of alarms can form redundant alarms, thereby improving reliability. Preferably, the alarm equipment comprises alarm devices of different types, the alarm recognition rate can be improved through visual and audible dual channels, the accident rate can be reduced, and the problem that the alarm light is difficult to distinguish due to the defects of achromatopsia, color weakness and the like of operators or the alarm sound is difficult to distinguish under a noisy environment so as to influence the operators to make quick response is avoided.
In some embodiments, the pressure output device 19 includes a pressure pump set, a refrigerating unit, and a water tank for storing the circulating fluid, and the pressure output device 19 is configured to provide the circulating fluid with a corresponding pressure to the liquid cooling plate 13 through the pressure pump set according to an instruction of the pressure control cabinet 32.
The main function of the pressure output device 19 is to match different pressure pump sets to generate circulating liquid with corresponding pressure according to the time-pressure set value transmitted by the pressure control cabinet 32, and send the circulating liquid with different pressure into the liquid cooling plate 13 through the second liquid outlet 21, the liquid inlet pipe 28 and the first liquid inlet 17, and after the circulating liquid with pressure circulates in the liquid cooling plate 13, heat with the battery module 12 returns to the water tank of the pressure output device 19 from the first liquid outlet 18, the liquid outlet pipe 29 and the second liquid inlet 20.
Preferably, as shown in fig. 1, the pressure output device 19 is configured with an alarm device, and the alarm device comprises a multicolor alarm lamp 37 and a buzzer 38, for example, when the liquid pressure in the liquid cooling plate 13 has abrupt change, an alarm instruction is generated by the industrial personal computer 22 and is transmitted to the pressure control cabinet 32, and the multicolor alarm lamp 37 and the buzzer 38 are controlled in time to generate an audible and visual alarm, so that an operator can be prompted to process in time, and the safety of personnel, equipment and samples is ensured.
As shown in fig. 2, the invention further provides a method for testing the circulating pressure of the liquid cooling plate of the battery pack, which uses the system for testing the circulating pressure of the liquid cooling plate of the battery pack in the embodiment and the example, and comprises the following steps:
s100, charging and discharging the power battery pack 11 through the charging and discharging tester 10;
S200, circulating liquid with different pressures corresponding to different road conditions is introduced into the liquid cooling plate 13 through the pressure output equipment 19;
and S300, acquiring liquid pressure data detected by the first pressure sensor 15 and the second pressure sensor, and providing a control strategy according to the liquid pressure data.
Specifically, in step S100, the charge/discharge tester 10 is connected to the positive and negative interfaces of the power battery pack 11 through the positive cable 23 and the negative cable 24, and is used for charging/discharging the power battery pack 11 to simulate the acceleration (discharging) and deceleration or braking (charging, energy recovery) processes of the vehicle when the vehicle is running under actual road conditions.
In step S200, the pressure control cabinet 32 controls the pressure output device 19 to output the circulated liquid with pressure to the liquid cooling plate 13 according to the formulated pressure waveform according to the different pressure waveform data corresponding to the different road conditions, so as to take away the heat generated in the charging and discharging process of the battery module 12.
The power battery pack 11 is provided with a first pressure sensor 15 and a second pressure sensor 16 at positions of the liquid cooling plate 13 near the first liquid inlet 17 and the first liquid outlet 18, and the first pressure sensor 15 and the second pressure sensor 16 are used for transmitting detected real-time pressure data in the liquid cooling plate 13 to the battery management module 14 so as to judge whether the pressure value of circulating liquid in the liquid cooling plate 13 is in a normal range.
In step S300, when the liquid pressure in the liquid cooling plate 13 is detected to be within the normal range (for example, 1p±0.1p), the pressure value transmitted from the pressure sensor to the battery management module 14 is recorded, and the pressure monitoring system is not triggered to alarm, so that the whole rack operates normally. When the abnormal liquid pressure in the liquid cooling plate 13 is detected, the system can give an alarm or give an alarm prompt to remind operators to process in time, so that the safety of the system operation and personnel is ensured.
In some embodiments, the step of providing a control strategy based on the fluid pressure data specifically comprises:
when the acquired liquid pressure data is in the first level range, the industrial personal computer 22 sends out a warning indication.
When the liquid with different waveforms of pressure continuously circulates and impacts the liquid cooling plate 13, once the pressure sensor detects that the pressure of the battery pack at the first liquid inlet 17 or the first liquid outlet 18 suddenly changes instantly, for example, the pressure of the liquid is in the first stage range of 1 P+/-0.2P, the battery management module 14 receives the data of the pressure sensor, and finds that the pressure changes, but still is in an acceptable range, the industrial personal computer 22 only gives a warning indication, and the pressure output device 19 is in the Level A-warning stage and cannot trigger various alarms.
In some embodiments, the step of providing a control strategy based on the fluid pressure data specifically comprises:
When the acquired liquid pressure data is in the second level range, the industrial personal computer 22 controls the alarm device to alarm.
When the pressure sensor detects that the pressure of the battery pack at the first liquid inlet 17 or the first liquid outlet 18 suddenly changes instantly, for example, the liquid pressure is in the second-stage range of 1 P+/-0.5P, the battery management module 14 receives the data of the pressure sensor, and detects that the pressure changes, the Level B, the alarm Level, is immediately sent out, and the industrial personal computer 22 sends an alarm command to the pressure control cabinet 32 through the upper computer software, so as to trigger the alarm equipment on the pressure output equipment 19, prompt on-site operators to timely process, and ensure the safety of the personnel and the test platform.
Further, when the battery management module 14 receives that the liquid pressure data is in the second level range, the upper computer software of the industrial personal computer 22 cuts off the charging and discharging actions of the charging and discharging tester 10 on the power battery pack 11, and stops charging and discharging the power battery pack 11, so as to avoid the power battery pack 11 from being failed, causing safety accidents, and the like.
In a preferred embodiment, the alarm device comprises at least one of an alarm lamp 37 and a buzzer 38, and the step of controlling the alarm device to alarm by the industrial personal computer 22 specifically comprises the step of controlling at least one alarm with sound effect or light effect by the industrial personal computer 22 to alarm. With reference to fig. 1, the industrial personal computer 22 can send an alarm command to the pressure control cabinet 32 through the software of the upper computer to trigger the alarm devices such as the multicolor alarm lamp 37 and the buzzer 38 on the pressure output device 19 to alarm simultaneously, and the alarm recognition rate is improved through the visual and audible dual channels, so that an operator can react quickly and perform corresponding processing. Wherein, the multicolor alarm lamp 37 can distinguish abnormal pressure grades through different colors, so that operators can quickly judge according to different colors. The buzzer 38 may sound intermittently or continuously, or may provide sounds of different decibels for the purpose of differentiating between abnormal levels of pressure. The alarm lamp 37 and the buzzer 38 can work simultaneously or alternately during the alarm, and are arranged according to actual demands.
According to the battery pack liquid cooling plate circulating pressure testing system and method, the power battery pack 11 is charged and discharged through the charging and discharging tester 10, the actual running condition of a vehicle can be simulated, the single pressure test of the liquid cooling plate 13 under the charging and discharging mode is more consistent with the use condition of a new energy vehicle under the actual road condition than that of the liquid cooling plate 13 under the static (non-charging and discharging mode), the testing accuracy and reliability can be improved, the liquid cooling plate 13 is tested to cover the conditions of various pressure liquid impacts suffered by the liquid cooling plate 13 in the actual use of the battery pack, the impact effect of various pressures can be tested by the liquid cooling plate 13 in the research and development stage, the liquid cooling plate 13 is ensured to be reused under the safe and reliable condition, the safety of drivers and passengers and the vehicle is improved, the liquid pressure data value is monitored in real time and transmitted to the industrial personal computer 22, and the alarm can be processed in time once the pressure value suddenly changes and exceeds the preset range, so that an operator can be prompted to process in time, and the accident risk is reduced.
According to the battery pack liquid cooling plate circulating pressure testing system and method, the liquid pressure of the liquid cooling plate 13 is monitored in real time, the pressure data value is transmitted to the upper computer software of the industrial personal computer 22, and once the pressure value is suddenly changed and exceeds the early warning value, the pressure output device 19 can give out audible and visual alarms to prompt operators to timely process, so that the risk of accidents is reduced. Based on the system operation is carried out under the condition of simulating the actual operation working condition of the vehicle, the liquid pressure of the liquid cooling plate 13 is monitored in the vehicle-mounted operation through the battery pack, an alarm is given under the condition that the liquid cooling plate 13 is abnormal in pressure, the current condition of the liquid cooling plate 13 of a driver and a passenger is prompted, the driver and the passenger are facilitated to process the abnormal condition in time, the accident occurrence risk is reduced, and the safety of the vehicle and the personnel is improved. The test system provided by the invention tests the deformation and whether the liquid cooling plate 13 leaks under the condition of continuously impacting circulating pressure, provides an evaluation for the liquid cooling plate 13 before being put into use, enables research and development enterprises to further optimize the liquid cooling plate 13 according to test results or put into market use under the condition that the performance meets the standards, and is put into use again under the condition that the safety and reliability of the liquid cooling plate 13 are ensured and the strength and welding tightness of the liquid cooling plate 13 are ensured, so that the safety of new energy vehicles and drivers and passengers is greatly improved, the risk of liquid leakage or breakage of the liquid cooling plate 13 is reduced, and the casualties are reduced.
It should be noted that the above-mentioned embodiments are merely for illustrating the technical solution of the present invention, and not for limiting the same, and although the present invention has been described in detail with reference to the above-mentioned embodiments, it should be understood by those skilled in the art that the technical solution described in the above-mentioned embodiments may be modified or some technical features may be equivalently replaced, and these modifications or substitutions do not make the essence of the corresponding technical solution deviate from the spirit and scope of the technical solution of the embodiments of the present invention.
Claims (10)
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