阅读说明：本技术 一种水冷散热的纽扣电池控温测试装置 (Button cell temperature control testing arrangement of water-cooling heat dissipation ) 是由 张朋诚 单智伟 李洒 黄耀迪 刘征 于 2019-12-18 设计创作，主要内容包括：一种水冷散热的纽扣电池控温测试装置,包括温控器和温控腔室两部分；温控腔室分为结构相同的正、负极温控腔；温控器的散热监测模块监测流经温控腔室的正、负极水冷头的冷却循环水水流的流速及温度状态；温控器的制冷片控制模块连接温控腔的正、负极制冷片,通过变换电流方向控制正、负极制冷片工作为制冷模式或加热模式；制冷片控制模块与温控器的散热监测模块通讯,当散热监测模块监测到循环水的流量或温度异常时,制冷片控制模块停止向正、负极制冷片供电；温控器的感温模块与正、负极温度传感器相连,并与制冷片控制模块通讯,对比测量的温度与设定值是否相同,控制模块启动或停止制冷片工作；本发明体积小、成本低、控温准确稳定。(A button cell temperature control testing device with water cooling comprises a temperature controller and a temperature control chamber; the temperature control chamber is divided into a positive electrode temperature control chamber and a negative electrode temperature control chamber with the same structure; a heat dissipation monitoring module of the temperature controller monitors the flow speed and the temperature state of cooling circulating water flow flowing through the positive and negative water cooling heads of the temperature control chamber; a refrigerating piece control module of the temperature controller is connected with a positive refrigerating piece and a negative refrigerating piece of the temperature control cavity, and the positive refrigerating piece and the negative refrigerating piece are controlled to work as a refrigerating mode or a heating mode by changing the current direction; the refrigerating sheet control module is communicated with a heat dissipation monitoring module of the temperature controller, and when the heat dissipation monitoring module monitors that the flow or the temperature of circulating water is abnormal, the refrigerating sheet control module stops supplying power to the positive and negative refrigerating sheets; a temperature sensing module of the temperature controller is connected with the positive and negative temperature sensors and is communicated with the refrigerating sheet control module, and the control module starts or stops the refrigerating sheet to work by comparing whether the measured temperature is the same as a set value or not; the invention has small volume, low cost and accurate and stable temperature control.)

1. A button cell temperature control testing device with water cooling and heat dissipation is characterized by comprising a temperature controller (1) and a temperature control chamber; the temperature control chamber is divided into a positive temperature control chamber (2) and a negative temperature control chamber (3) which have the same structure;

the main body part of the positive temperature control cavity (2) is sequentially provided with a positive water cooling head water inlet/outlet (2-1), a positive water cooling head (2-2), a positive refrigerating sheet (2-3) and a positive cold storage block (2-4) from outside to inside; the cold surface of the positive refrigeration piece (2-3) is bonded with the positive cold storage block (2-4) through heat conduction silicone grease, the hot surface of the positive refrigeration piece (2-3) is bonded with the surface of the positive water cooling head (2-2) through heat conduction silicone grease, and a positive temperature sensor (2-7) and a positive electrical signal test point (2-8) are arranged on the side edge of the positive cold storage block (2-4);

the main body part of the negative temperature control body cavity (3) is sequentially provided with a negative water cooling head water inlet/outlet (3-1), a negative water cooling head (3-2), a negative refrigerating sheet (3-3) and a negative cold storage block (3-4) from outside to inside; the cold surface of the negative refrigeration piece (3-3) is bonded with the negative cold storage block (3-4) through heat conduction silicone grease, the hot surface of the negative refrigeration piece (3-3) is bonded with the surface of the negative water cooling head (3-2) through heat conduction silicone grease, and a negative temperature sensor (3-7) and a negative electrical signal test point (3-8) are arranged on the side edge of the negative cold storage block (3-4);

the temperature controller (1) comprises a refrigerating sheet control module (1-1), a temperature sensing module (1-2) and a heat dissipation monitoring module (1-3); the heat dissipation monitoring module (1-3) monitors the flow speed and the temperature state of the cooling circulating water flow flowing through the positive and negative water cooling heads (2-2, 3-2); the refrigerating piece control module (1-1) is connected with the pins of the positive and negative refrigerating pieces (2-3, 3-3) of the temperature control cavity through control lines; the refrigerating sheet control module (1-1) is communicated with the heat dissipation monitoring module (1-3); the acquisition line of the temperature sensing module (1-2) is connected with the pins of the positive and negative temperature sensors (2-7, 3-7) of the temperature control cavity and is communicated with the refrigerating sheet control module (1-1).

2. The temperature control testing device for the water-cooled heat dissipation button cell as claimed in claim 1, wherein the positive cold storage block (2-4) is made of a metal material with good thermal and electrical conductivity, including but not limited to copper and aluminum.

3. The temperature control testing device for the water-cooling heat dissipation button cell as claimed in claim 1, wherein a 1mm depression is formed on the surface of the positive cold storage block (2-4), a 1mm protrusion is formed on the surface of the negative cold storage block (3-4), and button cells (4) to be tested with various sizes are mounted between the two cold storage blocks.

4. The temperature control testing device for the button cell with the water-cooling heat dissipation function as recited in claim 1, wherein a heat insulation layer (5) is further arranged between the positive pole cold storage blocks (2-4) and the negative pole cold storage blocks (3-4).

5. The temperature control testing device for the button cell with the water-cooling heat dissipation function as recited in claim 1, wherein the outer layer of the main body part of the temperature control chamber is provided with a positive insulating layer (2-5) and a negative insulating layer (3-5).

6. The temperature control testing device for the water-cooled heat dissipation button cell as recited in claim 5, wherein the positive and negative outer shells (2-6, 3-6) are arranged outside the positive and negative heat insulation layers (2-5, 3-5), and mounting holes are arranged on the positive and negative outer shells (2-6, 3-6) for fixing the whole device.

7. The temperature control testing device for the water-cooled heat dissipation button cell as recited in claim 1, wherein the side length of the positive and negative electrode refrigerating sheets (2-3, 3-3) is 4 cm, and the thickness is 5 mm.

Technical Field

The invention relates to the technical field of battery testing, in particular to a button battery temperature control testing device with water cooling and heat dissipation functions.

Background

In the rapidly developing new energy field, lithium ion batteries are distinguished from various secondary batteries due to the characteristic of high specific energy, become a hot energy storage device, and are widely applied to electric vehicles, electric tools and power grid energy storage. The united states is that the electrode materials, electrolyte and separator that make up a lithium ion battery can generally only operate over a narrow temperature window, beyond which serious damage can occur. For example, at lower temperatures, the negative electrode can undergo severe lithium precipitation, and the resulting lithium dendrites can puncture the separator, causing internal short circuits; at high temperatures, the electrode material may undergo a phase change, the electrolyte may volatilize or oxidize, and the separator may fail. Lithium ion batteries need to be able to accommodate a wide range of temperatures in an application. For example, in an electric vehicle in an extremely cold region, the battery needs to be able to maintain sufficient electric quantity at-20 ℃; in tropical regions, or the heat generated during the operation of the battery itself, the battery is required to be able to maintain normal operation at a temperature of +50 ℃. Therefore, the method has important practical significance for the temperature characteristic research of the lithium ion battery and the practical application of the lithium ion battery.

In a laboratory, the most common way for testing the performance of the lithium battery is to test the lithium ion button battery, so that the process is simple, the cost is low, and the period is short. Among the current technical scheme, to button cell's temperature test, adopt the mode of putting into large-scale thermostatic chamber with button cell to go on always, thermostatic chamber uses compressor and cold wind to cool down usually, thermostatic chamber's price is high, bulky, adjust the temperature slower, operation requirement height, leads to the efficiency of test lower, brings inconvenience for the in-service use. Therefore, the temperature test problem of the button cell is compared and researched, and through keyword retrieval, the patents listed in the patent number CN105700587A belong to the constant temperature cavity test type, so that the existing problems cannot be solved; the lithium ion temperature control device shown in patent CN103487761 is actually only a temperature sensing chamber of a lithium ion battery, and cannot realize real-time temperature control; CN107887672 and CN206180060 contain contents, which are a control strategy for battery thermal management, and are not temperature control devices for button cells.

In the temperature control of a small range, particularly in the refrigeration of the small range, a semiconductor refrigeration piece is a suitable technical means, the semiconductor refrigeration piece is also called a thermoelectric refrigeration piece and is divided into a cold side and a hot side, the temperature difference of about 40 ℃ can be realized on the two sides after the semiconductor refrigeration piece is electrified, the effect similar to heat transportation is generated by continuously electrifying, the current direction is changed, and one side of the refrigeration piece can be controlled to heat or refrigerate. For the application of the semiconductor refrigeration piece in the related field, such as CN106486719A, the power battery control system is based on the semiconductor refrigeration piece, but is not used for button battery testing. CN203689188U is a refrigerating device for semiconductor devices, but does not need to electrify semiconductor materials, only needs to control the temperature of a single surface of a material to be tested, and cannot be used for testing button cells. The device described in CN106876824 is improved to some extent, but the electrical test of the device on the battery is complicated and is not easy to implement; the provision of an insulating layer may actually result in distortion of the temperature measurement of the battery; the device has no heat preservation measures, so the temperature is difficult to reduce and maintain; and the refrigeration piece is not protected by heat dissipation, and is easy to damage, so that the whole practicability of the device is not strong. Therefore, it is necessary to design a button cell testing device with high efficiency, small size, wide temperature control range, accurate and stable temperature control, and simple and easy testing.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide a water-cooling heat dissipation button cell temperature control testing device which has the characteristics of small volume, low cost, accurate and stable temperature control, wide temperature range, easy electrical test and high working stability, and can keep the electrode shell of the button cell at a temperature of-30-60 ℃ or even wider range by utilizing water-cooling heat dissipation and realize larger temperature difference between the positive electrode shell and the negative electrode shell of the button cell.

In order to achieve the purpose, the technical scheme of the invention is as follows:

a button cell temperature control testing device with water cooling comprises a temperature controller 1 and a temperature control chamber; the temperature control chamber is divided into a positive temperature control cavity 2 and a negative temperature control cavity 3 which have the same structure;

the main body part of the positive temperature control cavity 2 is sequentially provided with a positive water cooling head water inlet/outlet 2-1, a positive water cooling head 2-2, a positive refrigerating sheet 2-3 and a positive cold storage block 2-4 from outside to inside; the cold surface of the positive refrigeration piece 2-3 is bonded with the positive cold storage block 2-4 through heat conduction silicone grease, the hot surface of the positive refrigeration piece 2-3 is bonded with the surface of the positive water cooling head 2-2 through heat conduction silicone grease, and a positive temperature sensor 2-7 and a positive electrical signal test point 2-8 are arranged on the side edge of the positive cold storage block 2-4;

the main body part of the negative temperature control body cavity 3 is sequentially provided with a negative water cooling head water inlet/outlet 3-1, a negative water cooling head 3-2, a negative refrigerating plate 3-3 and a negative cold storage block 3-4 from outside to inside; the cold surface of the negative refrigeration piece 3-3 is bonded with the negative cold storage block 3-4 through heat conduction silicone grease, the hot surface of the negative refrigeration piece 3-3 is bonded with the surface of the negative water cooling head 3-2 through heat conduction silicone grease, and a negative temperature sensor 3-7 and a negative electrical signal test point 3-8 are arranged on the side edge of the negative cold storage block 3-4;

the temperature controller 1 comprises a refrigerating sheet control module 1-1, a temperature sensing module 1-2 and a heat dissipation monitoring module 1-3; the heat dissipation monitoring module 1-3 monitors the flow speed and the temperature state of cooling circulating water flow flowing through the positive and negative water cooling heads 2-2 and 3-2; the refrigerating piece control module 1-1 is connected with the pins 2-3 and 3-3 of the positive and negative refrigerating pieces of the temperature control cavity through control lines; the refrigerating sheet control module 1-1 is communicated with the heat dissipation monitoring module 1-3; the acquisition line of the temperature sensing module 1-2 is connected with the pins of the positive and negative temperature 2-7, 3-7 sensors of the temperature control cavity and is communicated with the refrigerating sheet control module 1-1.

The positive cold storage blocks 2-4 are made of metal materials with good heat conductivity and electric conductivity, including but not limited to copper and aluminum materials.

The surface of the positive pole cold storage block 2-4 is provided with a 1mm depression, the surface of the negative pole cold storage block 3-4 is provided with a 1mm protrusion, and button batteries 4 to be tested with various sizes are arranged between the two cold storage blocks.

And a heat preservation layer 5 is also arranged between the positive pole cold storage blocks 2-4 and the negative pole cold storage blocks 3-4.

The outer layer of the main body part of the temperature control chamber is provided with a positive insulating layer 2-5 and a negative insulating layer 3-5.

The positive and negative outer shell layers 2-6, 3-6 are arranged outside the positive and negative heat insulation layers 2-5, 3-5, and mounting holes are arranged on the positive and negative outer shell layers 2-6, 3-6 for fixing and mounting the whole device.

The side length of the positive and negative refrigeration pieces 2-3 and 3-3 is 4 cm, and the thickness is 5 mm.

The invention has the advantages that:

the side length of the refrigerating sheet is only centimeter magnitude, the required cavity is very small, and the refrigerating sheet has heating and refrigerating capabilities. The battery performance measurement is more direct and accurate, the cooling sheet can be effectively protected by the arranged heat dissipation monitoring function, the overheating damage is prevented, the safety and the stability of the device are better, and the stable-30 ℃ testing environment can be achieved only by circulating water.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a schematic sectional view of the temperature-controlled chamber of the present invention.

Detailed Description

The invention will be further described with reference to the accompanying drawings.

Referring to fig. 1, a button cell temperature control testing device with water cooling includes a temperature controller 1 and a temperature control chamber.

Referring to fig. 2, the temperature control chamber is divided into a positive temperature control chamber 2 and a negative temperature control chamber 3 having the same structure.

The main body part of the positive temperature control cavity 2 is sequentially provided with a positive water cooling head water inlet/outlet 2-1, a positive water cooling head 2-2, a positive refrigerating sheet 2-3 and a positive cold storage block 2-4 from outside to inside; the cold surface of the positive refrigeration piece 2-3 is bonded with the positive cold storage block 2-4 through heat conduction silicone grease, the hot surface of the positive refrigeration piece 2-3 is bonded with the surface of the positive water cooling head 2-2 through heat conduction silicone grease, cooling circulating water flows through the water cooling head water inlet/outlet 2-1 to take away the heat of the water cooling head 2-2, and a positive temperature sensor 2-7 and a positive electrical signal test point 2-8 are arranged on the side edge of the positive cold storage block 2-4.

The structure of the negative temperature control body cavity 3 is the same as that of the positive temperature control cavity 2, namely the main body part sequentially comprises a negative water cooling head water inlet/outlet 3-1, a negative water cooling head 3-2, a negative refrigerating sheet 3-3 and a negative cold storage block 3-4 from outside to inside; the cold surface of the negative refrigeration piece 3-3 is bonded with the negative cold storage block 3-4 through heat conduction silicone grease, the hot surface of the negative refrigeration piece 3-3 is bonded with the surface of the negative water cooling head 3-2 through heat conduction silicone grease, and the side edge of the negative cold storage block 3-4 is provided with a negative temperature sensor 3-7 and a negative electrical signal test point 3-8.

The temperature controller 1 comprises a refrigerating sheet control module 1-1, a temperature sensing module 1-2 and a heat dissipation monitoring module 1-3; the heat dissipation monitoring module 1-3 monitors the flow speed and the temperature state of cooling circulating water flow flowing through the positive and negative water cooling heads 2-2 and 3-2; the refrigerating piece control module 1-1 is connected with the pins 2-3 and 3-3 of the positive and negative refrigerating pieces of the temperature control cavity through a control line, and controls the positive and negative refrigerating pieces 2-3 and 3-3 to work in a refrigerating mode or a heating mode by changing the current direction; the refrigerating sheet control module 1-1 is communicated with the heat dissipation monitoring module 1-3, and when the heat dissipation monitoring module 1-3 monitors that the flow or the temperature of circulating water is abnormal, the refrigerating sheet control module 1-1 stops supplying power to the positive and negative refrigerating sheets 2-3 and 3-3; the acquisition line of the temperature sensing module 1-2 is connected with pins of positive and negative temperature sensors 2-7, 3-7 of the temperature control cavity, and is communicated with the refrigerating sheet control module 1-1, and the measured temperature is compared with a set value to judge whether the measured temperature is the same or not, so that the control module 1-1 starts or stops the working of the refrigerating sheets 2-3, 3-3.

The positive cold storage blocks 2-4 are made of metal materials with good heat conductivity and electric conductivity, including but not limited to copper and aluminum materials. The positive cold storage blocks 2-4 play three roles, one of which is to uniformly conduct the temperature of the cold surface of the positive refrigeration piece 2-3 to the shell of the button cell 4 to be tested, so that the temperature distribution is more uniform and the temperature change is smoother; secondly, a temperature sensor 1-2 mounting port is preset on the positive pole cold storage block 2-4, and the temperature of the shell of the button cell 4 to be measured can be accurately measured by measuring the temperature of the positive pole cold storage block 2-4 because the temperature of the positive pole cold storage block 2-4 is consistent with that of the shell of the button cell 4 to be measured; and thirdly, the test electrode is used as a test electrode of the button cell 4 to be tested, the test electrode is in good electrical contact with the shell of the button cell 4 to be tested in a pressing mode, and an electric signal test line can be directly clamped on the positive cold storage block 2-4.

The surface of the positive cold storage block 2-4 is provided with a 1mm depression, the surface of the cold storage block negative electrode 3-4 is provided with a protrusion with the diameter of about 1mm, and button batteries 4 to be tested with various sizes are arranged between the two cold storage blocks.

An insulating layer 5 is arranged between the anode cold storage blocks 2-4 and the cathode cold storage blocks 3-4, and the temperature of the anode and cathode shells can be set independently.

The outer layer of the main body part of the temperature control chamber is provided with a positive insulating layer 2-5 and a negative insulating layer 3-5 which are used for reducing the heat transfer between the test cavity and the outside.

The positive and negative outer shell layers 2-6, 3-6 are arranged outside the positive and negative heat insulation layers 2-5, 3-5, and mounting holes are arranged on the positive and negative outer shell layers 2-6, 3-6 for fixing and mounting the whole device.

The side length of the positive and negative refrigeration pieces 2-3 and 3-3 is 4 cm, and the thickness is 5 mm.

The working principle of the invention is as follows: when the button battery is used, the positive temperature control cavity 2 and the negative temperature control cavity 3 are opened, the positive electrode of the button battery 4 to be tested is attached to the concave platform of the positive cold storage block 2-4, the negative temperature control cavity is covered on the positive temperature control cavity, the convex platform of the negative cold storage block 3-4 of the negative temperature control cavity is attached to the negative electrode of the battery, the upper fixing screw and the lower fixing screw are screwed, and the sponge foam type heat preservation layer 5 can be compressed to different heights according to the thickness of the battery, so that the button battery can be installed.

And (3) opening the temperature controller 1, reading the temperature values of the cold storage blocks of the positive and negative electrodes, setting the temperature of the required refrigeration piece, opening circulating water and setting a proper temperature, wherein the cooling water flows through the positive and negative water cooling heads 2-2 and 3-2, and the positive and negative refrigeration pieces 2-3 and 3-3 start to work after the heat dissipation monitoring module 1-3 is normal. The practical use proves that the device can realize the low temperature of-30 ℃ at the ambient working temperature of 25 ℃. Due to the fact that the heat insulation layer exists between the anode and the cathode, temperature difference of the anode and the cathode of the button cell can be achieved, different sensitivities of anode materials and cathode materials to temperature can be studied respectively, and temperature control of a plurality of chambers cannot be achieved. After the temperature of the button cell is stable, the performance of the button cell at a specific temperature can be measured through the four-electrode cell test lines 2-8 and 3-8.