CN106885993A - A kind of cryogenic test equipment and its control method for battery - Google Patents
A kind of cryogenic test equipment and its control method for battery Download PDFInfo
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- CN106885993A CN106885993A CN201710152405.0A CN201710152405A CN106885993A CN 106885993 A CN106885993 A CN 106885993A CN 201710152405 A CN201710152405 A CN 201710152405A CN 106885993 A CN106885993 A CN 106885993A
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- 238000012360 testing method Methods 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 10
- 239000004065 semiconductor Substances 0.000 claims abstract description 35
- 238000005057 refrigeration Methods 0.000 claims abstract description 22
- 238000009413 insulation Methods 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 4
- 239000011229 interlayer Substances 0.000 claims description 4
- 239000004519 grease Substances 0.000 claims description 3
- 239000012774 insulation material Substances 0.000 claims description 3
- 229920001296 polysiloxane Polymers 0.000 claims description 2
- 239000012634 fragment Substances 0.000 claims 2
- 238000010030 laminating Methods 0.000 claims 1
- 238000003032 molecular docking Methods 0.000 claims 1
- 238000001816 cooling Methods 0.000 abstract description 41
- 238000007789 sealing Methods 0.000 abstract description 16
- 230000017525 heat dissipation Effects 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/385—Arrangements for measuring battery or accumulator variables
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/1919—Control of temperature characterised by the use of electric means characterised by the type of controller
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Abstract
本发明公开了一种用于电池的低温试验装置及其控制方法，包括箱体、密封盖，箱体内设有温度传感器，箱体的中空腔内设有夹持座；夹持座包括第一夹持部和与第一夹持部对接紧贴的第二夹持部，二者接触面位置处设有用于放置电池的容置腔；密封盖与第一夹持部固定连接，两根电极柱一端伸入第一夹持部实体内并直达容置腔，电极柱另一端穿出密封盖；两根电极柱位于第一夹持部内的一端分别与正、负极弹片电连接；箱体壁上安装有制冷模组；箱体外设有温度控制系统，该温度控制系统分别与温度传感器、半导体制冷片、散热风扇电连接。该试验装置具有体积小、成本低、结构紧凑、温度分布均匀、密闭性好、适用性广等优点。
The invention discloses a low-temperature test device for batteries and a control method thereof, comprising a box body and a sealing cover, a temperature sensor is arranged in the box body, and a clamping seat is arranged in a hollow cavity of the box body; the clamping seat includes a first A clamping part and a second clamping part which is docked and closely attached to the first clamping part, a storage cavity for placing batteries is provided at the contact surface of the two; the sealing cover is fixedly connected with the first clamping part, and two One end of the electrode column extends into the first clamping part entity and directly reaches the accommodating cavity, and the other end of the electrode column passes through the sealing cover; the ends of the two electrode columns located in the first clamping part are respectively electrically connected to the positive and negative shrapnel; the box body A refrigeration module is installed on the wall; a temperature control system is provided outside the box, and the temperature control system is electrically connected to a temperature sensor, a semiconductor refrigeration sheet, and a cooling fan. The test device has the advantages of small size, low cost, compact structure, uniform temperature distribution, good airtightness, and wide applicability.
Description
技术领域technical field
本发明属于电池试验装置领域，具体涉及一种用于电池的低温试验装置及其控制方法。The invention belongs to the field of battery testing devices, and in particular relates to a low-temperature testing device for batteries and a control method thereof.
背景技术Background technique
电池的容量特性、内阻数值等参数是反映电池基本性能的重要特性指标，而这些指标受温度影响尤其是受低温影响较大，所以模拟其低温环境对电池各性能参数进行测试，显得尤为重要。Parameters such as battery capacity characteristics and internal resistance value are important characteristic indicators reflecting the basic performance of the battery, and these indicators are greatly affected by temperature, especially low temperature, so it is particularly important to test various performance parameters of the battery by simulating its low temperature environment .
目前，进行电池低温试验时，一般采用市面上的高低温试验箱或者高精度恒温试验箱来进行。但这些试验箱主要存在如下缺陷：At present, when conducting battery low temperature tests, it is generally carried out by using high and low temperature test chambers or high-precision constant temperature test chambers on the market. However, these test chambers mainly have the following defects:
1.价格较高、体积较大、温度调节速度较慢，内部温度分布不均匀。1. The price is high, the volume is large, the temperature adjustment speed is slow, and the internal temperature distribution is uneven.
2.在进行电池试验时，电池难以固定。并且，由于连接设备时需将导线引出，试验箱中开设有专门的通道用以穿过导线，导致其密闭性差。2. During the battery test, the battery is difficult to fix. Moreover, since the wires need to be led out when connecting the equipment, a special channel is provided in the test box for passing the wires, resulting in poor airtightness.
3.在结构上不满足电池单体这种小型的试验对象，试验对象及其组件的放置位置离试验箱壳体存在间隔空间，电池在试验过程中所产生的热量不能及时传导出去。3. The structure is not suitable for small test objects such as battery cells. There is a space between the test object and its components and the test box shell, and the heat generated by the battery during the test cannot be conducted in time.
本项目受“中南大学中央高校基本科研业务费专项资金(2016zzts361)”资助。This project is funded by "Central South University Special Fund for Basic Scientific Research Operation Expenses of Central Universities (2016zzts361)".
发明内容Contents of the invention
针对上述问题，本发明旨在提供一种体积小、成本低、结构紧凑、温度分布均匀、密闭性好、适用性广、热传导快的用于电池的低温试验装置。In view of the above problems, the present invention aims to provide a low-temperature test device for batteries with small volume, low cost, compact structure, uniform temperature distribution, good airtightness, wide applicability and fast heat conduction.
本发明解决问题的技术方案是：一种用于电池的低温试验装置，包括由保温壳体构成的中空箱体，箱体顶部敞开，敞开处设有用于密封箱体的密封盖，箱体内设有温度传感器，所述箱体的中空腔内设有与箱体形状相同且可导热的夹持座；The technical scheme for solving the problem of the present invention is: a low-temperature test device for batteries, including a hollow box made of an insulating shell, the top of the box is open, and a sealing cover for sealing the box is provided at the opening. A temperature sensor is provided, and the hollow cavity of the box body is provided with a clamping seat that is the same shape as the box body and can conduct heat;
所述夹持座包括第一夹持部和与第一夹持部对接紧贴的第二夹持部，二者接触面位置处设有用于放置电池的容置腔，容置腔内设有正、负极弹片；The clamping seat includes a first clamping portion and a second clamping portion that is butted against the first clamping portion. A storage cavity for placing batteries is provided at the contact surface of the two, and a storage cavity is provided in the storage cavity. Positive and negative shrapnel;
所述密封盖与第一夹持部固定连接；The sealing cover is fixedly connected with the first clamping part;
还包括两根电极柱，两根电极柱一端伸入第一夹持部实体内并直达容置腔，电极柱另一端穿出密封盖；It also includes two electrode columns, one end of the two electrode columns extends into the first clamping part entity and directly reaches the accommodating cavity, and the other end of the electrode column passes through the sealing cover;
两根电极柱位于第一夹持部内的一端分别与正、负极弹片电连接；One end of the two electrode columns located in the first clamping part is electrically connected to the positive and negative shrapnel respectively;
所述箱体壁上安装有制冷模组，该制冷模组包括紧贴箱体壁上的半导体制冷片、贴覆在半导体制冷片背面的散热片、以及安装于散热片位置处的散热风扇；A refrigeration module is installed on the box wall, and the refrigeration module includes a semiconductor cooling sheet close to the box wall, a heat sink attached to the back of the semiconductor cooling sheet, and a cooling fan installed at the position of the cooling fin;
所述箱体外设有温度控制系统，该温度控制系统分别与温度传感器、半导体制冷片、散热风扇电连接。A temperature control system is provided outside the box, and the temperature control system is electrically connected to a temperature sensor, a semiconductor cooling chip, and a cooling fan.
上述方案中，夹持座用于对电池进行固定，第一夹持部与密封盖固定后，拖拽密封盖就能将第一夹持部从箱体中取出。温度控制系统用于对箱体内温度进行控制。两根电极柱位于箱体外的一端用于与相应的测试仪器(如电阻测试仪)电连接。In the above solution, the clamping seat is used to fix the battery, and after the first clamping part and the sealing cover are fixed, the first clamping part can be taken out from the box by dragging the sealing cover. The temperature control system is used to control the temperature in the box. One end of the two electrode columns located outside the box is used for electrical connection with a corresponding testing instrument (such as a resistance tester).
为了更利于电池在试验过程中热量传导，所述夹持座与箱体中空腔内壁贴合。In order to be more conducive to the heat conduction of the battery during the test, the clamping seat is attached to the inner wall of the cavity in the box.
优选的，所述第一夹持部和第二夹持部接触位置的容置腔对称设置。Preferably, the accommodating cavities at the contact positions of the first clamping part and the second clamping part are arranged symmetrically.
具体的，所述保温壳体包括可导热的内板、外板、以及设置于内板和外板之间的保温材质的夹层；Specifically, the thermal insulation shell includes a thermally conductive inner panel, an outer panel, and an interlayer of thermal insulation material arranged between the inner panel and the outer panel;
所述制冷模组安装于箱体四周，制冷模组的半导体制冷片的正面紧贴内板，散热风扇置于箱体外部并用网罩封盖。The refrigeration module is installed around the box body, the front of the semiconductor refrigeration sheet of the refrigeration module is close to the inner plate, and the cooling fan is placed outside the box body and sealed with a mesh cover.
优选的，在第一夹持部朝向第二夹持部的侧面上设有凹槽或凸起，在第二夹持部朝向第一夹持部的侧面上对应设有凸起或凹槽，第一夹持部和第二夹持部上的凹槽和凸起相互嵌合。。Preferably, grooves or protrusions are provided on the side of the first clamping part facing the second clamping part, and protrusions or grooves are correspondingly provided on the side of the second clamping part facing the first clamping part, The grooves and protrusions on the first clamping part and the second clamping part fit into each other. .
进一步的，所述第一夹持部底部延伸设有朝向第二夹持部方向的承力板，第二夹持部底部置于承力板上表面。设置承力板的目的在于可以使得第二夹持部与第一夹持部同步向上运动，从而使得通过密封盖将第一夹持部拖出时顺势将第二夹持部拖出。Further, the bottom of the first clamping part is extended with a force bearing plate facing the direction of the second clamping part, and the bottom of the second clamping part is placed on the upper surface of the force bearing plate. The purpose of setting the bearing plate is to enable the second clamping part to move upward synchronously with the first clamping part, so that when the first clamping part is pulled out through the sealing cover, the second clamping part will be pulled out along the way.
为进一步便于热量传导，在内板与半导体制冷片、半导体制冷片与散热片、以及散热片与散热风扇之间都涂有导热硅脂，半导体制冷片的制冷方式采用多级制冷方式。In order to further facilitate heat conduction, thermal conductive silicone grease is applied between the inner panel and the semiconductor cooling sheet, the semiconductor cooling sheet and the heat sink, and the heat sink and the cooling fan. The cooling method of the semiconductor cooling sheet adopts a multi-stage cooling method.
具体的，所述温度控制系统包括单片机、温度设置与显示模块、制冷模组驱动模块、通信模块。Specifically, the temperature control system includes a single-chip microcomputer, a temperature setting and display module, a refrigeration module driver module, and a communication module.
相应的，本发明还提供一种上述用于电池的低温试验装置的控制方法，其特征在于包括以下步骤：Correspondingly, the present invention also provides a control method for the above-mentioned low-temperature test device for batteries, which is characterized by comprising the following steps:
1)用户设置温度目标值T0以及控温误差值Δδ(Δδ＞0)；1) The user sets the temperature target value T 0 and the temperature control error value Δδ (Δδ>0);
2)读取用户设置的温度目标值T0以及控温误差值Δδ，以此得到目标温度下限值为T0-Δδ，目标温度上限值为T0+Δδ；2) Read the temperature target value T 0 and the temperature control error value Δδ set by the user, so as to obtain the lower limit value of the target temperature T 0 -Δδ, and the upper limit value of the target temperature T 0 +Δδ;
3)读取箱内当前温度，记为T；3) Read the current temperature in the box and denote it as T;
4)若T＜T0-Δδ，则温度控制系统控制散热风扇工作，半导体制冷片停止工作，返回到步骤3)；4) If T<T 0 -Δδ, the temperature control system controls the cooling fan to work, the semiconductor cooling chip stops working, and returns to step 3);
5)若T0-Δδ≤T≤T0+Δδ，则温度控制系统控制散热风扇、半导体制冷片停止工作，返回到步骤3)；5) If T 0 -Δδ≤T≤T 0 +Δδ, the temperature control system controls the cooling fan and the semiconductor cooling chip to stop working, and returns to step 3);
6)若T＞T0+Δδ，则散热风扇、半导体制冷片均工作，不断对当前温度值进行读取，直到当前温度值小于或等于温度下限值，然后，散热风扇、半导体制冷片均停止工作，返回到步骤3)。6) If T>T 0 +Δδ, both the cooling fan and the semiconductor cooling sheet are working, and the current temperature value is continuously read until the current temperature value is less than or equal to the lower limit of the temperature, and then the cooling fan and the semiconductor cooling sheet are both working. Stop working and go back to step 3).
本发明的显著效果是：Notable effect of the present invention is:
1.该试验装置具有体积小、成本低、结构紧凑、温度分布均匀、密闭性好等优点。1. The test device has the advantages of small size, low cost, compact structure, uniform temperature distribution, and good airtightness.
2.适用于多种规格的电池进行低温性能试验，有效地保证了测试过程中的恒温，电池在试验过程中所产生的热量能快速传导。2. It is suitable for the low-temperature performance test of batteries of various specifications, which effectively ensures the constant temperature during the test process, and the heat generated by the battery during the test process can be quickly conducted.
3.控温误差可根据实际需求进行调整。3. The temperature control error can be adjusted according to actual needs.
附图说明Description of drawings
下面结合附图对本发明作进一步说明。The present invention will be further described below in conjunction with accompanying drawing.
图1为本发明试验装置主剖视示意图。Fig. 1 is a schematic cross-sectional view of the test device of the present invention.
图2为本发明试验装置俯视图。Fig. 2 is a top view of the test device of the present invention.
图3是本发明温度控制系统总体框图。Fig. 3 is an overall block diagram of the temperature control system of the present invention.
图中：1-保温壳体，2-箱体，3-密封盖,4-温度传感器,5-夹持座，51-第一夹持部,52-第二夹持部,53-承力板,6-容置腔，7-电极柱,8-制冷模组，9-凸起，11-内板，12-外板，13-夹层，81-半导体制冷片,82-散热片，83-散热风扇,84-网罩。In the figure: 1-Insulation shell, 2-Box body, 3-Sealing cover, 4-Temperature sensor, 5-Clamping seat, 51-First clamping part, 52-Second clamping part, 53-Bearing force Plate, 6-accommodating cavity, 7-electrode column, 8-cooling module, 9-protrusion, 11-inner plate, 12-outer plate, 13-interlayer, 81-semiconductor cooling sheet, 82-radiating fin, 83 -cooling fan, 84-grille.
具体实施方式detailed description
如图1～2所示，一种用于电池的低温试验装置，包括由保温壳体1构成的中空箱体2。所述保温壳体1包括可导热的内板11、外板12、以及设置于内板11和外板12之间的保温材质的夹层13。箱体2顶部敞开，敞开处设有用于密封箱体2的密封盖3，箱体2内设有温度传感器4。所述密封盖3上设有把手。As shown in FIGS. 1-2 , a low-temperature test device for batteries includes a hollow box 2 composed of a heat-insulating shell 1 . The thermal insulation shell 1 includes a thermally conductive inner panel 11 , an outer panel 12 , and an interlayer 13 of thermal insulation material disposed between the inner panel 11 and the outer panel 12 . The top of the box body 2 is open, and the opening is provided with a sealing cover 3 for sealing the box body 2 , and a temperature sensor 4 is arranged inside the box body 2 . The sealing cover 3 is provided with a handle.
所述箱体2的中空腔内设有与箱体2形状相同且可导热的金属夹持座5。所述夹持座5与箱体2中空腔内壁贴合。所述夹持座5包括第一夹持部51和与第一夹持部51对接紧贴的第二夹持部52，二者接触面位置处设有用于放置电池的容置腔6，容置腔6内设有正、负极弹片。所述第一夹持部51和第二夹持部52接触位置的容置腔6对称设置。The hollow cavity of the box body 2 is provided with a metal clamping seat 5 having the same shape as the box body 2 and capable of conducting heat. The clamping seat 5 is attached to the inner wall of the cavity in the box body 2 . The clamping seat 5 includes a first clamping portion 51 and a second clamping portion 52 that abuts closely against the first clamping portion 51, and an accommodating chamber 6 for placing a battery is provided at the position of the contact surface of the two, for accommodating The positive and negative shrapnels are arranged in the cavity 6 . The accommodating cavities 6 at the contact positions of the first clamping portion 51 and the second clamping portion 52 are arranged symmetrically.
在第一夹持部51朝向第二夹持部52的侧面上端和下端分别设有凸起9和凹槽，在第二夹持部52朝向第一夹持部51的侧面上端和下端对应设有凹槽和凸起9，第一夹持部51和第二夹持部52上的凹槽和凸起9相互嵌合。Protrusions 9 and grooves are respectively provided at the upper end and the lower end of the side of the first clamping part 51 towards the second clamping part 52, and correspondingly provided at the upper and lower ends of the side of the second clamping part 52 towards the first clamping part 51. There are grooves and protrusions 9 , and the grooves and protrusions 9 on the first clamping part 51 and the second clamping part 52 fit into each other.
所述第一夹持部51底部延伸设有朝向第二夹持部52方向的承力板53，第二夹持部52底部置于承力板53上表面。The bottom of the first clamping portion 51 is extended with a bearing plate 53 facing the direction of the second clamping portion 52 , and the bottom of the second clamping portion 52 is placed on the upper surface of the bearing plate 53 .
所述密封盖3与第一夹持部51固定连接。两根电极柱7一端伸入第一夹持部51实体内并直达容置腔6，电极柱7另一端穿出密封盖3。The sealing cover 3 is fixedly connected with the first clamping portion 51 . One ends of the two electrode posts 7 extend into the first clamping portion 51 and directly reach the accommodating cavity 6 , and the other ends of the electrode posts 7 pass through the sealing cover 3 .
两根电极柱7位于第一夹持部51内的一端分别与正、负极弹片电连接。One end of the two electrode columns 7 located in the first clamping portion 51 is electrically connected to the positive and negative elastic pieces respectively.
所述箱体2壁四周安装有制冷模组8，该制冷模组包括紧贴箱体壁上的半导体制冷片81、贴覆在半导体制冷片81背面的散热片82、以及安装于散热片82位置处的散热风扇83。半导体制冷片81的正面紧贴内板11，散热风扇83置于箱体2外部并用网罩84封盖。内板11与半导体制冷片81、半导体制冷片81与散热片82、以及散热片82与散热风扇83之间都涂有导热硅脂，半导体制冷片81的制冷方式采用多级制冷方式。A refrigeration module 8 is installed around the wall of the box body 2, and the refrigeration module includes a semiconductor refrigeration sheet 81 close to the casing wall, a heat sink 82 attached to the back of the semiconductor refrigeration sheet 81, and a heat sink installed on the heat dissipation sheet 82. The cooling fan 83 at the position. The front side of the semiconductor cooling plate 81 is close to the inner plate 11, and the cooling fan 83 is placed outside the casing 2 and sealed with a mesh cover 84. Thermally conductive silicon grease is coated between the inner plate 11 and the semiconductor cooling plate 81, the semiconductor cooling plate 81 and the heat sink 82, and the heat sink 82 and the cooling fan 83. The cooling method of the semiconductor cooling plate 81 adopts a multi-stage cooling method.
所述箱体2外设有温度控制系统，所述温度控制系统包括单片机、温度设置与显示模块、制冷模组驱动模块、通信模块。该温度控制系统分别与温度传感器4、半导体制冷片81、散热风扇83电连接。A temperature control system is provided outside the box body 2, and the temperature control system includes a single-chip microcomputer, a temperature setting and display module, a refrigeration module drive module, and a communication module. The temperature control system is electrically connected with the temperature sensor 4, the semiconductor cooling chip 81, and the cooling fan 83 respectively.
如图3所示，所述温度控制系统的工作原理是：以单片机为处理中心，接收当前温度值以及用户设置的温度目标值、控温误差值，经过单片机内部控制算法处理，单片机IO口输出控制信号，通过控制功率调整电路的通断来控制制冷模组8，达到控温的目的。在单片机的外围电路中，通过按键设置控制系统的温度目标值以及控温误差值，通过显示屏显示温度目标值、控温误差值以及当前温度值，通过指示灯指示制冷模组的工作状态。As shown in Figure 3, the working principle of the temperature control system is: take the single-chip microcomputer as the processing center, receive the current temperature value, the temperature target value and the temperature control error value set by the user, and process through the internal control algorithm of the single-chip microcomputer, and the IO port of the single-chip microcomputer outputs The control signal is used to control the refrigeration module 8 by controlling the power adjustment circuit on and off, so as to achieve the purpose of temperature control. In the peripheral circuit of the single-chip microcomputer, the temperature target value and temperature control error value of the control system are set through the buttons, the temperature target value, temperature control error value and current temperature value are displayed on the display screen, and the working status of the refrigeration module is indicated through the indicator light.
可以通过通信模块接口将温度控制系统连接到上位机，一方面可以将试验装置内的实际温度反馈给上位机并显示，另一方面可以通过上位机设置目标温度值以及控温误差值，这样便于电池各项参数都可通过上位机软件进行设置、读取与显示。The temperature control system can be connected to the host computer through the communication module interface. On the one hand, the actual temperature in the test device can be fed back to the host computer and displayed. On the other hand, the target temperature value and temperature control error value can be set through the host computer. This is convenient All parameters of the battery can be set, read and displayed through the host computer software.
本实施例还提供一种上述用于电池的低温试验装置的控制方法，其特征在于包括以下步骤：This embodiment also provides a control method for the above-mentioned low-temperature test device for batteries, which is characterized by comprising the following steps:
1)用户设置温度目标值T0以及控温误差值Δδ(Δδ＞0)；1) The user sets the temperature target value T 0 and the temperature control error value Δδ (Δδ>0);
2)读取用户设置的温度目标值T0以及控温误差值Δδ，以此得到目标温度下限值为T0-Δδ，目标温度上限值为T0+Δδ；2) Read the temperature target value T 0 and the temperature control error value Δδ set by the user, so as to obtain the lower limit value of the target temperature T 0 -Δδ, and the upper limit value of the target temperature T 0 +Δδ;
3)读取箱内当前温度，记为T；3) Read the current temperature in the box and denote it as T;
4)若T＜T0-Δδ，则温度控制系统控制散热风扇83工作，半导体制冷片81停止工作，返回到步骤3)；4) If T<T 0 -Δδ, the temperature control system controls the cooling fan 83 to work, and the semiconductor cooling chip 81 stops working, and returns to step 3);
5)若T0-Δδ≤T≤T0+Δδ，则温度控制系统控制散热风扇83、半导体制冷片81停止工作，返回到步骤3)；5) If T 0 -Δδ≤T≤T 0 +Δδ, the temperature control system controls the cooling fan 83 and the semiconductor cooling plate 81 to stop working, and returns to step 3);
6)若T＞T0+Δδ，则散热风扇83、半导体制冷片81均工作，不断对当前温度值进行读取，直到当前温度值小于或等于温度下限值，然后，散热风扇83、半导体制冷片81均停止工作，返回到步骤3)。6) If T>T 0 +Δδ, then the heat dissipation fan 83 and the semiconductor cooling sheet 81 are all working, and the current temperature value is continuously read until the current temperature value is less than or equal to the temperature lower limit value, and then the heat dissipation fan 83, the semiconductor refrigeration sheet Refrigerating sheet 81 all stops working, returns to step 3).
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