Uniform temperature device testing device

Abstract

The application provides a testing device for a uniform temperature piece, which is used for testing the uniform temperature piece. The uniform temperature piece comprises a body part and a phase change working medium. The body part has a containing cavity and an opening. The opening is communicated with the containing cavity. The phase change working medium is contained in the containing cavity. The testing device for the uniform temperature piece comprises a supporting part, a heating part, a temperature detecting element and a pumping and injecting mechanism. The supporting part is used for supporting the uniform temperature piece. The heating part is used for heat exchange with the uniform temperature piece. The temperature detecting element is used for connecting with the outer surface of the uniform temperature piece and detecting the temperature of at least two positions of the uniform temperature piece. The pumping and injecting mechanism is used for injecting the phase change working medium into the containing cavity through the opening and / or pumping out the phase change working medium from the containing cavity. The testing device for the uniform temperature piece provided by the application is favorable for reducing the cost of performance testing of the uniform temperature piece.

Description

Technical Field

[0001] This application relates to the field of heat exchanger testing technology, and in particular to a heat exchanger testing device. Background Technology

[0002] Batteries are being used more and more widely in daily life and industry. For example, new energy vehicles equipped with batteries are now widely used.

[0003] In batteries, temperature-sensing devices are typically used to regulate the properties of individual cells, ensuring greater consistency across them. Before mass production, temperature-sensing devices usually require testing to assess the impact of different parameters on their temperature-sensing performance. Related technologies often involve manufacturing multiple prototype temperature-sensing devices and testing them all, thus increasing testing costs. Utility Model Content

[0004] This application provides a temperature homogenizer testing device to reduce the testing cost of temperature homogenizers.

[0005] The temperature homogenizer testing device provided in this application embodiment is used to test the temperature homogenizer. The temperature homogenizer includes a body and a phase change working medium. The body has a receiving cavity and an opening. The opening communicates with the receiving cavity. The phase change working medium is contained in the receiving cavity. The temperature homogenizer testing device includes a support, a heating element, a temperature detection element, and an injection mechanism. The support is used to support the temperature homogenizer. The heating element is used to exchange heat with the temperature homogenizer. The temperature detection element is used to connect with the outer surface of the temperature homogenizer and detect the temperature at at least two locations of the temperature homogenizer. The injection mechanism is used to inject the phase change working medium into the receiving cavity through the opening and / or extract the phase change working medium from the receiving cavity.

[0006] The temperature homogenizer testing device provided in this application embodiment, by setting an injection mechanism, can inject or extract a phase change working medium into the receiving cavity of the temperature homogenizer, thereby changing the amount of phase change working medium in the temperature homogenizer. Using a single temperature homogenizer sample, the effect of different amounts of phase change working medium on the temperature homogenization performance of the temperature homogenizer can be tested. This is beneficial to saving the preparation cost of the temperature homogenizer sample and shortening the testing cycle, thus reducing the cost of performance testing of the temperature homogenizer.

[0007] In some embodiments, the temperature equalization testing device further includes a cover, which covers the heating element and is used to cover the heating element between the temperature equalization element and the cover.

[0008] In the above embodiments, by setting a cover to cover the heating element, the heat dissipation of the heating element is reduced, so that the heating element can more accurately reflect the heating temperature of the heat exchanger by the battery cells under operating conditions. This further helps to improve the accuracy of the heat exchanger testing device in testing the effect of different phase change working fluid injection amounts on the heat exchanger's heat exchanger performance, so as to more accurately test the optimal injection amount of phase change working fluid in the heat exchanger.

[0009] In some embodiments, the temperature equalization element includes a heating zone and a cooling zone. The heating element is used to heat the heating zone, and the temperature equalization element testing device also includes a cooling component, which is used to connect with the surface of the cooling zone and cool the cooling zone.

[0010] In the above embodiments, by setting up a cooling component to simulate the operating conditions of the heat exchange components in the battery cooling the heat exchange component, it is beneficial to more accurately test the impact of different phase change working fluid injection amounts on the heat exchange performance of the heat exchange component. This allows for more precise testing of the optimal injection amount of phase change working fluid in the heat exchange component, and the cooling temperature range or temperature value corresponding to the high cooling efficiency of the cooling component can be obtained through the heat exchange component testing device.

[0011] In some embodiments, the phase change working fluid is configured to switch between a gaseous and a liquid state. The body portion has a first portion and at least one second portion, the first and second portions being plate-shaped. The at least one second portion is connected to at least one end of the first portion along a first direction and extends upward relative to the first portion along a gravitational direction, the first direction intersecting the gravitational direction. The receiving cavity includes a first sub-cavity and a second sub-cavity that communicate with each other, the first portion having the first sub-cavity and the second portion having the second sub-cavity. The first portion includes a heating zone for heating at least a portion of the first portion, and the second portion includes a cooling zone for cooling at least a portion of the second portion.

[0012] In the above embodiments, while the heating element simulates the temperature equalization of the battery cells by the temperature equalization element, the cooling component can simulate the cooling of the battery cells by the temperature equalization element under operating conditions. The circulation of liquid phase change working fluid in the first and second sub-cavities simulates the cooling function of the battery cells, which helps to improve the heat exchange efficiency between the cooling component and the temperature equalization element. This allows for a more accurate test of the impact of different injection amounts of phase change working fluid on the temperature equalization performance of the temperature equalization element, so as to more accurately test the optimal injection amount of phase change working fluid in the temperature equalization element. Furthermore, the cooling temperature range or temperature value corresponding to the high cooling efficiency of the temperature equalization element can be obtained by testing the temperature equalization element using the temperature equalization element testing device.

[0013] In some embodiments, the heating element includes a heating film attached to the surface of the first part. Alternatively, the heating element includes a battery cell assembly comprising a plurality of battery cells arranged at least along a first direction, and the battery cell assembly is supported on the first part.

[0014] In the above embodiments, by providing a heating element including a heating film, it is convenient to flexibly set the area for heat exchange between the heating film and the first part, and the heating temperature of the heating film on the battery cell can be flexibly controlled.

[0015] In some embodiments, the heating element includes a battery cell assembly, which includes at least a plurality of battery cells arranged along a first direction, and the battery cell assembly is supported on the first part.

[0016] In the above embodiments, by including a battery cell assembly in the heating element, it is beneficial to improve the accuracy of the temperature homogenization performance of the temperature homogenization element under different injection amounts of phase change working fluid in the temperature homogenization element testing device, so as to obtain a more accurate optimal injection amount of phase change working fluid for the temperature homogenization element through testing.

[0017] In some embodiments, the cooling assembly includes an air duct and an air supply component, the air duct being supported on a support and fitting against a second part, the air duct having an air duct, and the air supply component for supplying air to the air duct.

[0018] In the above embodiments, by setting the cooling component to include air ducts and air supply components, it is beneficial to simplify the structure of the cooling component and facilitate the adjustment of the cooling temperature of the cooling component to the second part according to actual needs, so as to improve the accuracy of the temperature homogenization performance of the temperature homogenizer under different phase change working fluid injection amounts, so as to obtain a more accurate optimal injection amount of phase change working fluid for the temperature homogenizer through testing.

[0019] In some embodiments, the temperature detection element includes multiple temperature sensors, which are arranged at intervals along a first direction and a second direction. The first direction, the second direction, and the gravity direction intersect each other but are not coplanar. The multiple temperature sensors are used to detect the temperature of the first part.

[0020] In the above embodiments, by setting up multiple temperature sensors arranged in an array along the first and second directions, the temperature at multiple locations of the temperature homogenizer can be collected during the testing of the temperature homogenizer. This can more accurately reflect the quality of the temperature homogenization performance of the temperature homogenizer and facilitate obtaining the optimal injection amount of the phase change working fluid of the temperature homogenizer more accurately through testing.

[0021] In some embodiments, the temperature equalization element testing device further includes a first valve element for connection to the body portion to block or open the opening.

[0022] In the above embodiments, by setting a first valve, it is easier to open and close the opening as needed, thereby improving the convenience of the temperature equalization component testing device in the process of testing the temperature equalization component.

[0023] In some embodiments, the temperature equalization testing device further includes a temperature constant element having a temperature constant chamber, in which at least a heating element and a temperature sensing element are housed, and the temperature constant chamber is also used to house the temperature equalization element.

[0024] In the above embodiments, it is beneficial to reduce the risk that changes in ambient temperature will affect the accuracy of test results of the temperature homogenizer testing device. Furthermore, the effect of different ambient temperatures on the temperature homogenization performance of the temperature homogenizer can be simulated by changing only the temperature of the isothermal element without changing the amount of phase change working fluid injected into the temperature homogenizer.

[0025] In some embodiments, the temperature equalization testing device further includes a pressure testing element, which is at least partially disposed within the receiving cavity and detects the pressure within the receiving cavity.

[0026] In the above embodiments, a pressure testing element is set to detect the pressure inside the containment cavity, so that the operator can understand the pressure on the main body in a timely manner. If the pressure inside the containment cavity exceeds the bearing capacity of the main body, corresponding response measures can be taken in a timely manner to reduce the risk of damage to the main body, leakage of the phase change working fluid, and the risk of test failure. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the temperature equalization component testing device provided in the embodiments of this application; Figure 2 A cross-sectional view of the temperature equalization testing device provided in the embodiments of this application; Figure 3 An exploded view of the temperature equalization testing device provided in the embodiments of this application; Figure 4 A cross-sectional view of the temperature equalization component being measured; Figure 5 This is a diagram showing the distribution of temperature sensors on the temperature homogenizer in the temperature homogenizer testing device provided in the embodiments of this application.

[0028] The accompanying drawings are not necessarily drawn to scale.

[0029] Explanation of reference numerals in the attached figures: 1. Temperature equalization component testing device; 10. Support components; 20. Heating element; 20a. Heating film; 30. Temperature sensing element; 31. Temperature sensor; 40. Irrigation and dispensing organization; 50. Cover components; 60. Cooling components; 61. Air duct components; 61a. Air duct; 62. Air supply components; 2. Temperature equalization element; 2a. Heating zone; 2b. Cooling zone; 21. Body part; 21a. Receiving cavity; 21b. Opening; 211. First part; 211a. First sub-cavity; 212. Second part; 212a. Second sub-cavity; X, the first direction; Y, the second direction; G, the direction of gravity. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings. The described embodiments should not be regarded as limitations on this application. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this application; the terms “comprising” and “having”, and any variations thereof, in the specification and the foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0032] In the description of the embodiments of this application, the technical terms "first," "second," "third," etc., are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0033] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0034] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects are in an "or" relationship.

[0035] In the description of the embodiments of this application, the technical terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "top", "bottom", "inner", "outer", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0036] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0037] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical term "contact" should be interpreted broadly, and can be direct contact, contact through an intermediate medium layer, contact between two contacting parties with substantially no interaction force, or contact between two contacting parties with interaction force.

[0038] In the embodiments of this application, "parallel" includes not only the case of absolute parallelism, but also the case of approximate parallelism as commonly understood in engineering; similarly, "perpendicular" also includes not only the case of absolute perpendicularity, but also the case of approximate perpendicularity as commonly understood in engineering. Specifically, if the angle between two directions is 85°-90°, the two directions can be considered perpendicular; if the angle between two directions is 0°-5°, the two directions can be considered parallel.

[0039] Currently, new energy batteries are being used more and more widely in daily life and industry. They are not only used in energy storage systems for hydropower, thermal power, wind power, and solar power plants, but also extensively in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in aerospace and other fields. With the continuous expansion of the application areas of new energy batteries, the market demand is also constantly increasing.

[0040] A battery device comprises multiple battery cells, which are connected in series, parallel, or mixed configurations. A mixed configuration refers to a combination of series and parallel connections among the battery cells. A battery cell is the smallest independent unit capable of being charged and discharged independently. A battery cell can be a rechargeable battery, meaning it can be reused after discharge by recharging to reactivate its active materials. Battery cells can be lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-metal hydride batteries, nickel-cadmium batteries, lead-acid batteries, etc.

[0041] During normal operation, battery cells cycle through charging and discharging, generating heat during these processes. In some cases, heat exchangers are installed to transfer heat from hotter cells to other locations, thus equalizing the temperature of multiple cells and improving their performance stability. For example, in an energy storage container, part of the heat exchanger contacts multiple battery cells, while another part contacts the container's body. This ensures temperature uniformity across the cells and transfers heat generated by the cells to the container, allowing it to dissipate into the external environment.

[0042] A phase change medium (PCC) can be incorporated into a temperature homogenizer. This PCC can interconvert between at least two of the gaseous, liquid, and solid states, cyclically absorbing and releasing heat through phase changes, thereby transferring heat. The amount of PCC in the temperature homogenizer significantly affects its temperature homogenization performance. Therefore, before mass production, temperature homogenizers are typically tested to determine the impact of different PCC amounts on their performance, ultimately identifying the optimal PCC content.

[0043] In related technologies, it is often necessary to prepare multiple isothermal sample pieces with different phase change working fluids and test multiple different isothermal sample pieces. This increases the cost of isothermal sample preparation and the testing cycle is long, which increases the cost of isothermal sample performance testing.

[0044] In view of this, such as Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the temperature homogenizer testing device 1 provided in this application embodiment is used to test the temperature homogenizer 2. The temperature homogenizer 2 includes a body part 21 and a phase change working medium. The body part 21 has a receiving cavity 21a and an opening 21b. The opening 21b communicates with the receiving cavity 21a. The phase change working medium is contained in the receiving cavity 21a. The temperature homogenizer testing device 1 includes a support member 10, a heating member 20, a temperature detection element 30, and an injection mechanism 40. The support member 10 is used to support the temperature homogenizer 2. The heating member 20 is used to exchange heat with the temperature homogenizer 2. The temperature detection element 30 is used to connect with the outer surface of the temperature homogenizer 2 and detect the temperature at at least two locations of the temperature homogenizer 2. The injection mechanism 40 is used to inject the phase change working medium into the receiving cavity 21a through the opening 21b, and / or to extract the phase change working medium from the receiving cavity 21a.

[0045] The phase change working fluid in the temperature equalization element 2 includes, but is not limited to, paraffin wax, water, ammonia, or acetone. At room temperature, the phase change working fluid can be in a liquid state. During the operation of the battery device, the battery cells generate heat, which heats the phase change working fluid. The liquid phase change working fluid can absorb heat and vaporize to form a gaseous phase change working fluid. The gaseous phase change working fluid flows within the receiving cavity 21a. When the gaseous phase change working fluid flows to the area of ​​the temperature equalization element 2 corresponding to the lower-temperature battery cell, the gaseous phase change working fluid heats the lower-temperature battery cell and releases heat, thus converting the gaseous phase change working fluid into a liquid phase change working fluid. This cycle continues, and the phase change working fluid absorbs heat from the higher-temperature battery cells and heats the lower-temperature battery cells through the conversion between liquid and gaseous states, thereby equalizing the temperature of different battery cells.

[0046] Alternatively, at room temperature, the phase change working fluid can be solid. During battery operation, the individual battery cells generate heat, which heats the solid phase change working fluid. The solid phase change working fluid absorbs heat and liquefies into a liquid phase change working fluid. The liquid phase change working fluid flows within the receiving cavity 21a. When the liquid phase change working fluid flows to the region of the temperature equalization element 2 corresponding to the lower-temperature battery cell, it heats the lower-temperature battery cell and releases heat, thus converting the liquid phase change working fluid into a solid phase change working fluid. This cycle repeats, with the phase change fluid absorbing heat from the higher-temperature battery cell and heating the lower-temperature battery cell through the conversion between solid and liquid states, thereby equalizing the temperature of different battery cells.

[0047] The amount of phase change medium in the temperature homogenizer 2 has a significant impact on its temperature homogenization performance. If the amount of phase change medium is too small, insufficient medium will participate in the heat absorption and release processes of the cycle, leading to reduced heat transfer efficiency. Heat from the hotter battery cells cannot be transferred to the cooler battery cells in a timely manner, resulting in poor temperature homogenization performance of the temperature homogenizer 2. Conversely, if the amount of phase change medium is too large, the flow space of the liquid phase change medium after absorbing heat and transitioning from solid to liquid will be small, affecting its fluidity and heat transfer efficiency. Alternatively, the flow space of the gaseous phase change medium after absorbing heat and transitioning from liquid to gaseous will also be small, affecting its fluidity and thus heat transfer efficiency. Therefore, it can be seen that if the amount of phase change working fluid in the temperature equalizer 2 is too high or too low, it will affect the temperature equalization performance of the temperature equalizer 2. The temperature equalizer testing device 1 provided in the embodiment of this application can be used to test the effect of the content of different phase change working fluids on the temperature equalization performance of the temperature equalizer 2, so as to obtain the optimal amount of phase change working fluid required for the temperature equalizer 2.

[0048] The support member 10 supports the temperature equalization member 2, providing support for the temperature equalization member 2. The heating member 20 can be supported on the temperature equalization member 2. The heating member 20 can be any structure capable of heating different areas of the support member 10. For example, the heating member 20 can be a heating film 20a, or it can include multiple battery cells. The heating member 20 can simulate the operating conditions of the temperature equalization member 2 under conditions where different battery cells heat the temperature equalization member 2 as their temperatures rise.

[0049] The temperature sensing element 30 can detect the temperature at at least two locations on the temperature equalization element 2. The temperature sensing element 30 can be located on the side of the temperature equalization element 2 opposite to the heating element 20. The temperature sensing element 30 may include components such as sheet-like or wire-like temperature sensors, and is attached to the outer surface of at least two locations on the temperature equalization element 2. Optionally, the temperature sensing element 30 can detect the temperature at two, three, four, or more locations on the temperature equalization element 2. After the temperature equalization element testing device 1 has been running for a period of time, i.e., after the temperature equalization element 20 has been heated for a period of time, the heat absorption and release of the phase change working fluid, as well as the gas-liquid or solid-liquid conversion, will reach equilibrium. The flow of the refrigerant towards liquid will tend to stabilize, and the temperature at each location on the temperature equalization element 2 will also tend to stabilize. At this time, by detecting the temperature at different locations on the temperature equalization element 2, the temperature difference at different locations can be obtained.

[0050] The amount of phase change working fluid in the temperature homogenizer 2 was changed multiple times, and the temperature homogenizer testing device 1 was run multiple times to detect the temperature difference at different locations of the temperature homogenizer 2 under different amounts of phase change working fluid using the temperature sensing element 30. The temperature difference at different locations of the temperature homogenizer 2 under different amounts of phase change working fluid was compared. The smaller the temperature difference, the better the temperature homogenization effect of the temperature homogenizer 2 under the corresponding amount of phase change working fluid.

[0051] It is understandable that when the temperature sensing element 30 only detects the temperature at two locations on the temperature equalizer 2, the temperature difference can be the difference between the temperatures at the two locations. However, when the temperature sensing element 30 detects the temperature at multiple locations on the temperature equalizer 2, the average temperature at multiple locations can be calculated first, and then the difference between the temperature at each location and the average value can be calculated. The smaller the difference, the smaller the temperature difference between different locations, and the better the temperature equalization effect of the temperature equalizer 2. Of course, other calculation methods that can reflect the magnitude of the temperature difference between different locations are also possible. Other suitable methods for calculating the temperature difference can be used without violating the testing purpose of the temperature equalizer testing device 1 provided in this application.

[0052] The amount of phase change working fluid in the temperature equalization element 2 can be changed by the injection mechanism 40. Specifically, after each test, all the phase change working fluid in the temperature equalization element 2 can be extracted, and then a different amount of phase change working fluid can be injected. Alternatively, a larger amount of phase change working fluid can be injected into the temperature equalization element 2 first, and then after each test, a portion of the phase change working fluid can be extracted from the temperature equalization element 2 using the injection mechanism 40. Of course, a smaller amount of phase change working fluid can also be injected into the temperature equalization element 2 first, and then after each test, a corresponding amount of phase change working fluid can be injected into the receiving cavity 21a.

[0053] In this way, by using a sample of temperature homogenizer 2, the temperature homogenization performance of temperature homogenizer 2 corresponding to different amounts of phase change working fluid can be tested, which is beneficial to reducing the sample cost of temperature homogenizer 2 and shortening the test cycle.

[0054] The injection mechanism 40 injects phase change working fluid into the receiving cavity 21a through the opening 21b, or extracts phase change working fluid from the receiving cavity 21a, thereby changing the amount of phase change working fluid in the receiving cavity 21a. During the extraction or injection of phase change working fluid by the injection mechanism 40, the opening 21b can be left open, meaning the receiving cavity 21a can communicate with the outside. After the extraction or injection by the injection mechanism 40 is completed, the opening 21b can be sealed using sealing components or valves to reduce the risk of phase change working fluid leakage.

[0055] The temperature homogenizer testing device 1 provided in this application embodiment, by setting an injection mechanism 40, injects a phase change working medium into the receiving cavity 21a of the temperature homogenizer 2, or extracts a phase change working medium from the receiving cavity 21a of the temperature homogenizer 2, thereby changing the amount of phase change working medium in the temperature homogenizer 2. Using a single temperature homogenizer 2 sample, the influence of different amounts of phase change working medium on the temperature homogenization performance of the temperature homogenizer 2 can be tested, which is beneficial to saving the preparation cost of the temperature homogenizer 2 sample and shortening the testing cycle. In this way, it is beneficial to reduce the cost of performance testing of the temperature homogenizer 2.

[0056] In some embodiments, such as Figure 1 and Figure 2 As shown, the temperature equalization component testing device 1 also includes a cover component 50, which covers the heating component 20 and is used to cover the heating component 20 between the temperature equalization component 2 and the cover component 50.

[0057] By setting the heating power of the heating element 20, the specific heating temperature of the heating element 20 on the heat spreader 2 can be set, so as to more accurately simulate the heating temperature of the battery cell on the heat spreader 2 under actual working conditions.

[0058] By covering the heating element 20 with a cover 50, the heat dissipated from the heating element 20 to the environment outside the temperature equalizer 2 is reduced, allowing more heat generated by the heating element 20 to be dissipated onto the temperature equalizer 2. This allows the heating element 20 to more accurately reflect the heating temperature of the temperature equalizer 2 by the battery cells under operating conditions, further improving the accuracy of the temperature equalizer testing device 1 in testing the effect of different injection amounts of phase change working fluid on the temperature equalization performance of the temperature equalizer 2, thus enabling more precise testing of the optimal injection amount of phase change working fluid in the temperature equalizer 2.

[0059] In some embodiments, such as Figure 1 , Figure 2 and Figure 3 As shown, the temperature equalization element 2 includes a heating zone 2a and a cooling zone 2b. The heating element 20 is used to heat the heating zone 2a. The temperature equalization element testing device 1 also includes a cooling component 60, which is used to connect to the surface of the cooling zone 2b and cool the cooling zone 2b.

[0060] When the temperature-equalizing element 2 is assembled in the battery device, a cooling plate or other heat exchange components may be used to cool the temperature-equalizing element 2, thereby cooling the individual battery cells. By setting up a cooling component 60 to cool the cooling zone 2b of the temperature-equalizing element 2, the working condition of using a cooling plate or other means to cool the temperature-equalizing element 2 in the battery is simulated.

[0061] Optionally, the cooling component 60 can cool the cooling zone 2b of the heat exchanger 2 using either air cooling or liquid cooling. The cooling component 60 can be in close contact with the cooling zone 2b, or the cooling component 60 can be spaced apart from the cooling zone 2b, and the heat transfer between them can be through thermal radiation, thermal conduction, or thermal convection.

[0062] When the temperature-equalizing element 2 is used in a battery device, the battery cells and cooling plates, among other heat exchange components, correspond to different areas of the temperature-equalizing element 2. Based on the actual working conditions, the specific locations of the heating zone 2a and cooling zone 2b of the temperature-equalizing element 2 can be rationally divided. The heating element 20 heats the heating zone 2a to simulate heat exchange between the battery cells and the temperature-equalizing element 2, while the cooling element 60 cools the cooling zone 2b to simulate heat exchange between the relevant heat exchange components and the temperature-equalizing element 2, thereby cooling the temperature-equalizing element 2.

[0063] In addition, during the test, while keeping the phase change working fluid in the temperature homogenizer 2 constant, the cooling temperature of the cooling component 60 on the temperature homogenizer 2 is changed to test the effect of different cooling temperatures of the cooling component 60 on the temperature homogenization performance of the temperature homogenizer 2, or on the cooling efficiency of the temperature homogenizer 2, so as to test and determine the optimal temperature or optimal temperature value for the cooling component 60 to cool the temperature homogenizer 2.

[0064] Therefore, by setting up the cooling component 60 to simulate the operating conditions of the heat exchange components in the battery device cooling the heat exchange component 2, it is beneficial to more accurately test the influence of different phase change working fluid injection amounts on the heat exchange performance of the heat exchange component 2, so as to more accurately test the optimal injection amount of phase change working fluid in the heat exchange component 2, and the cooling temperature range or temperature value corresponding to the high cooling efficiency of the cooling component 60 on the heat exchange component 2 can be obtained by testing the heat exchange component testing device 1.

[0065] In some embodiments, such as Figure 3 and Figure 4As shown, the phase change working fluid is configured to switch between a gaseous and a liquid state. The body portion 21 has a first portion 211 and at least one second portion 212. The first portion 211 and the second portion 212 are respectively plate-shaped. At least one second portion 212 is connected to at least one end of the first portion 211 along a first direction X and extends upward relative to the first portion 211 along the gravitational direction G. The first direction X intersects the gravitational direction G. The receiving cavity 21a includes a first sub-cavity 211a and a second sub-cavity 212a that are interconnected. The first portion 211 has the first sub-cavity 211a, and the second portion 212 has the second sub-cavity 212a. The first portion 211 includes a heating zone 2a, and a heating element 20 is used to heat at least a portion of the first portion 211. The second portion 212 includes a cooling zone 2b, and a cooling assembly 60 is used to cool at least a portion of the second portion 212.

[0066] Optionally, the main body 21 may include one or two second parts 212, which are connected to at least one end of the first part 211 along the first direction X and extend upward relative to the first part 211 along the gravitational direction G. For example, the two second parts 212 are respectively connected to both ends of the first part 211 along the first direction X. Thus, each of the two second parts 212 has a second sub-cavity 212a, which is respectively connected to both ends of the first sub-cavity 211a along the first direction X. After the liquid phase change working fluid in the first sub-cavity 211a vaporizes, it can flow to the two second sub-cavities 212a, which is beneficial to improving the cooling efficiency of the cooling assembly 60 on the temperature equalization element 2.

[0067] Since the first part 211 includes a heating zone 2a, the heating element 20 is used to heat at least a portion of the first part 211, and since the second part 212 includes a cooling zone 2b, the cooling assembly 60 is used to cool at least a portion of the second part 212. Furthermore, since the second part 212 extends upward relative to the first part 211 along the gravitational direction G, the second sub-cavity 212a extends upward relative to the first sub-cavity 211a along the gravitational direction G.

[0068] At room temperature, the phase change working fluid is in a liquid state. After being heated by the heating element 20, at least a portion of the liquid phase change working fluid in the first sub-cavity 211a converts into a gaseous state. Under the influence of buoyancy, it floats upward along the direction of gravity G and flows into the second sub-cavity 212a. In the second sub-cavity 212a, the gaseous phase change working fluid exchanges heat with the cooling component 60, releasing heat and converting back into a liquid state. The liquid phase change working fluid automatically flows back into the first sub-cavity 211a under the influence of gravity and exchanges heat with the heating element 20 again. This cycle continues. The flow of the phase change working fluid in the first sub-cavity 211a provides a certain temperature equalization function for the heating element 20. The back-and-forth flow of the phase change medium in the first sub-cavity 211a and the second sub-cavity 212a allows the cooling component 60 to provide a certain cooling function for the heating element 20 through the temperature equalization element 2, simulating the cooling condition of the battery cell by the temperature equalization element 2.

[0069] Furthermore, the cooling component 60 and the temperature equalizer 2 have high heat exchange efficiency. With the injection amount of phase change working fluid in the temperature equalizer 2 remaining constant, for example, the injection amount of phase change working fluid in the temperature equalizer 2 can be the amount yielded by the test to achieve the optimal temperature equalization performance. By changing the cooling temperature of the cooling component 60 on the temperature equalizer 2, and detecting the average temperature value at different locations on the temperature equalizer 2 using the temperature detection element 30, it can be understood that the lower the average temperature value at different locations on the temperature equalizer 2, the better the cooling effect of the cooling component 60 on the temperature equalizer 2; and the smaller the temperature difference between different locations, the better the temperature equalization performance of the temperature equalizer 2. In this way, the cooling temperature range or temperature value corresponding to a high cooling efficiency of the cooling component 60 on the temperature equalizer 2, or a good temperature equalization performance of the temperature equalizer 2, can be more accurately tested.

[0070] Thus, while the heating element 20 simulates the temperature equalization of the battery cells by the temperature equalization element 2, the cooling component 60 can simulate the cooling of the battery cells by the temperature equalization element 2 under operating conditions. The circulation of liquid phase change working fluid in the first sub-cavity 211a and the second sub-cavity 212a simulates the cooling function of the battery cells, which helps to improve the heat exchange efficiency between the cooling component 60 and the temperature equalization element 2. This allows for a more accurate test of the impact of different injection amounts of phase change working fluid on the temperature equalization performance of the temperature equalization element 2, so as to more accurately test the optimal injection amount of phase change working fluid in the temperature equalization element 2. Furthermore, the cooling temperature range or temperature value corresponding to the high cooling efficiency of the cooling component 60 on the temperature equalization element 2 can be obtained by testing with the temperature equalization element testing device 1.

[0071] In some embodiments, such as Figure 2 and Figure 3As shown, the heating element 20 includes a heating film 20a, which is attached to the surface of the first part 211; or, the heating element 20 includes a battery cell assembly, which includes a plurality of battery cells arranged at least along the first direction X, and the battery cell assembly is supported on the first part 211.

[0072] The portion where the heating film 20a is attached to the first part 211 can be the area where the heat exchanger 2 corresponds to the battery cell during actual use, while other areas are not covered by the heating film 20a. Optionally, a single heating film 20a can be integrally attached to the surface of the first part 211. Alternatively, to improve the realism of the heating film 20a simulating heat exchange between the battery cell and the heat exchanger 2, multiple heating films 20a can be attached to different areas of the first part 211, and each heating film 20a can be set to a different heating temperature.

[0073] By providing a heating element 20 including a heating film 20a, it is convenient to flexibly set the area for heat exchange between the heating film 20a and the first part 211, and the heating temperature of the heating film 20a on the battery cell can be flexibly controlled.

[0074] In some embodiments, the heating element 20 includes a battery cell assembly, which includes a plurality of battery cells arranged at least along a first direction X, and the battery cell assembly is supported on the first part 211.

[0075] The battery cell can be a battery cell used in a battery device and exchange heat with the heat exchanger 2. Two or more sets of battery cell assemblies can be arranged along a direction intersecting the first direction X to more realistically simulate the heat exchange scenario between the battery cell and the heat exchanger 2 under operating conditions.

[0076] By including a battery cell assembly in the heating element 20, the accuracy of the temperature uniformity performance of the temperature uniformity element 2 under different injection amounts of phase change working fluid is improved by the temperature uniformity element testing device 1, so as to obtain a more accurate optimal injection amount of phase change working fluid for the temperature uniformity element 2 through testing.

[0077] In some embodiments, such as Figure 3 and Figure 4 As shown, the cooling assembly 60 includes an air duct 61 and an air supply component 62. The air duct 61 is supported on the support member 10 and is in contact with the second part 212. The air duct 61 has an air duct 61a, and the air supply component 62 is used to supply air to the air duct 61a.

[0078] The air supply component 62 can be a fan or the like. Air is supplied into the air duct 61a through the air supply component 62 to accelerate the airflow on the surface of the second part 212, thereby achieving the purpose of cooling the second part 212. The cooling effect of the cooling component 60 on the second part 212 can be adjusted by adjusting the air supply intensity of the air supply component 62 to the air duct 61a.

[0079] Therefore, by setting the cooling component 60 to include the air duct 61a and the air supply component 62, it is beneficial to simplify the structure of the cooling component 60 and to make it easier to adjust the cooling temperature of the cooling component 60 on the second part 212 according to actual needs, so as to improve the accuracy of the temperature uniformity performance of the temperature uniformity component 2 under different phase change working fluid injection amounts by the temperature uniformity component testing device 1, so as to obtain a more accurate optimal injection amount of phase change working fluid for the temperature uniformity component 2 through testing.

[0080] In some embodiments, such as Figure 3 and Figure 5 As shown, the temperature detection element 30 includes a plurality of temperature sensors 31, which are arranged at intervals along the first direction X and the second direction Y. The first direction X, the second direction Y and the gravity direction G intersect each other but are not coplanar. The plurality of temperature sensors 31 are used to detect the temperature of the first part 211.

[0081] The first direction X, the second direction Y, and the gravity direction G can be perpendicular to each other. Multiple temperature sensors 31 are arranged in an array along the first direction X and the second direction Y to detect the temperature at more locations of the temperature equalizer 2. For example, the multiple temperature sensors 31 can be symmetrically arranged relative to the first part 211 of the temperature equalizer 2 along the center lines of the first direction X and the second direction Y, respectively.

[0082] During the test, with other parameters unchanged, only the amount of phase change working fluid in the temperature equalizer 2 was changed, and multiple sets of tests were conducted. The temperature values ​​of multiple sensors were recorded, and the temperature equalization performance of the temperature equalizer 2 in the multiple sets of tests was judged based on the temperature detected by multiple sensors, so as to obtain the amount of deformation working fluid corresponding to the best temperature equalization performance.

[0083] Therefore, by setting up multiple temperature sensors 31 arranged in an array along the first direction X and the second direction Y, the temperature at multiple locations of the temperature equalizer 2 can be collected during the testing of the temperature equalizer 2. This can more accurately reflect the quality of the temperature equalization performance of the temperature equalizer 2, and facilitate obtaining the optimal injection amount of the phase change working fluid of the temperature equalizer 2 more accurately through testing.

[0084] In some embodiments, the temperature equalization element testing device 1 further includes a first valve element, which is used to connect to the body part 21 to block or open the opening 21b.

[0085] Specifically, when the phase change working fluid is injected into the receiving cavity 21a by the injection mechanism 40, or when the phase change working fluid in the receiving cavity 21a is extracted, the opening 21b is opened to allow the extraction device to communicate with the receiving cavity 21a via the opening 21b. During the testing of the temperature equalizer 2, the first valve blocks the opening 21b to reduce the risk of the phase change working fluid in the temperature equalizer 2 flowing out through the opening 21b.

[0086] Therefore, by setting the first valve, it is easier to open and close the opening 21b more flexibly as needed, thereby improving the convenience of the temperature equalizer testing device 1 in the process of testing the temperature equalizer 2.

[0087] In some embodiments, the temperature equalization testing device 1 further includes a temperature constant element, which has a temperature constant chamber, in which at least the heating element 20 and the temperature sensing element 30 are housed, and the temperature constant chamber is also used to house the temperature equalization element 2.

[0088] The temperature control component can be a temperature control chamber or similar structure. The temperature of the temperature control component can be changed to simulate different ambient temperatures while keeping other parameters constant, so as to test the effect of ambient temperature on the temperature uniformity performance of the temperature uniformity component 2.

[0089] Optionally, the support member 10, heating member 20, temperature sensing element 30, and injection mechanism 40 can all be located within the constant temperature chamber of the constant temperature component. Alternatively, only the heating member 20 and temperature sensing element 30 can be housed within the constant temperature chamber, and the temperature homogenizer 2 can also be housed within the constant temperature chamber during testing. In embodiments where the temperature homogenizer testing device 1 further includes a cover member 50, the cover member 50 can also be located within the constant temperature chamber.

[0090] During the testing of the constant temperature component, the heating element 20 and the temperature equalization component 2 exchange heat. When the flow of the phase change working fluid in the temperature equalization component 2 is relatively stable, the temperature of different positions of the temperature equalization component 2 is detected by the temperature detection element 30 to simulate the effect of the injection amount of the phase change working fluid on the temperature equalization performance of the phase change working fluid under a specific ambient temperature.

[0091] This helps reduce the risk that changes in ambient temperature will affect the accuracy of the test results of the temperature homogenizer testing device 1. Furthermore, the temperature of the isothermal element can be changed without altering the amount of phase change working fluid injected into the temperature homogenizer 2 to simulate the effect of different ambient temperatures on the temperature homogenization performance of the temperature homogenizer 2.

[0092] In some embodiments, the temperature equalization testing device 1 further includes a pressure testing element, which is at least partially disposed within the receiving cavity 21a and detects the pressure within the receiving cavity 21a.

[0093] During operation, the phase change working fluid in the temperature equalization component 2 may cause pressure changes in the cavity 21a. Since the load-bearing capacity of the main body 21 is limited, if the pressure in the cavity 21a exceeds the load-bearing capacity of the main body 21, it may cause the main body 21 to crack, thus leading to test failure.

[0094] The pressure testing element is used to detect the pressure inside the receiving cavity 21a. Depending on the structural type of the pressure testing element, during the test, all or part of the pressure testing element can be located inside the receiving cavity 21a.

[0095] By setting up a pressure testing element to detect the pressure inside the receiving cavity 21a, the operator can promptly understand the pressure that the main body 21 is subjected to. If the pressure inside the receiving cavity 21a exceeds the bearing capacity of the main body 21, corresponding response measures can be taken in a timely manner to reduce the risk of damage to the main body 21, leakage of the phase change working fluid, and test failure.

[0096] The following description, in conjunction with the accompanying drawings, illustrates a specific embodiment of this application.

[0097] In some embodiments, such as Figures 1 to 5As shown, the temperature homogenizer testing device 1 provided in this embodiment of the application is used to test the temperature homogenizer 2. The temperature homogenizer 2 includes a body portion 21 and a phase change working fluid. The body portion 21 has a receiving cavity 21a and an opening 21b. The opening 21b communicates with the receiving cavity 21a, and the phase change working fluid is received in the receiving cavity 21a. The body portion 21 includes a first part 211 and two second parts 212. Both the second parts 212 and the first part 211 are plate-shaped, and the two second parts 212 are respectively connected to the two ends of the first part 211 along the first direction X. The second parts 212 extend upward relative to the first part 211 along the gravitational direction G. The receiving cavity 21a includes a first sub-cavity 211a and a second sub-cavity 212a that are interconnected. The first part 211 has the first sub-cavity 211a, and the second part 212 has the second sub-cavity 212a. The first part 211 includes a heating zone 2a, and the second part 212 includes a cooling zone 2b. The temperature homogenizer testing device 1 includes a support 10, a heating element 20, a temperature sensing element 30, an injection mechanism 40, a cover 50, a cooling assembly 60, a temperature control element, and a pressure testing element. The support 10 supports the temperature homogenizer 2. The heating element 20 exchanges heat with the heating zone 2a of the first part 211. The temperature sensing element 30 includes multiple temperature sensors 31, which are arranged at intervals along a first direction X and a second direction Y, and are connected to the surface of the first part 211 to detect the temperature of the first part 211. The first direction X, the second direction Y, and the gravitational direction G intersect each other but are not coplanar. The injection mechanism 40 is used to inject the phase change working medium into the receiving cavity 21a through the opening 21b, and / or to extract the phase change working medium from the receiving cavity 21a. A cover 50 covers the heating element 20, and the cover 50 is used to cover the heating element 20 between the temperature equalization element 2 and the cover 50. The cooling assembly 60 includes an air duct 61 and an air supply element 62. The air duct 61 is supported by the support 10 and is in contact with the second part 212. The air duct 61 has an air duct 61a, and the air supply element 62 is used to supply air to the air duct 61a. The cooling assembly 60 is used to cool the cooling zone 2b. A first valve is used to connect to the body part 21 to block or open the opening 21b. The temperature constant element has a temperature constant chamber, in which at least the heating element 20 and the temperature sensing element 30 are housed. The temperature constant chamber is also used to house the temperature equalization element 2, and a pressure testing element is used to detect the pressure in the housing 21a.

[0098] The temperature homogenizer testing device 1 provided in this application embodiment, by setting an injection mechanism 40, injects a phase change working medium into the receiving cavity 21a of the temperature homogenizer 2, or extracts a phase change working medium from the receiving cavity 21a of the temperature homogenizer 2, thereby changing the amount of phase change working medium in the temperature homogenizer 2. Using a single temperature homogenizer 2 sample, the influence of different amounts of phase change working medium on the temperature homogenization performance of the temperature homogenizer 2 can be tested, which is beneficial to saving the preparation cost of the temperature homogenizer 2 sample and shortening the testing cycle. In this way, it is beneficial to reduce the cost of performance testing of the temperature homogenizer 2.

[0099] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A temperature equalization component testing device, characterized in that, A device for testing a temperature homogenizer, the temperature homogenizer comprising a body and a phase change working fluid, the body having a receiving cavity and an opening, the opening communicating with the receiving cavity, the phase change working fluid being received within the receiving cavity, and the temperature homogenizer testing device comprising: Support member, used to support the temperature equalization member; Heating element, used for heat exchange with heat exchanger; A temperature sensing element is used to connect to the outer surface of the temperature equalization element and to detect the temperature at at least two locations on the temperature equalization element; An injection mechanism is used to inject the phase change working fluid into the receiving cavity through the opening, and / or to extract the phase change working fluid from the receiving cavity.

2. The temperature equalization component testing device according to claim 1, characterized in that, The temperature equalization component testing device further includes a cover component, which covers the heating component and is used to cover the heating component between the temperature equalization component and the cover component.

3. The temperature equalization component testing device according to claim 1, characterized in that, The temperature equalization element includes a heating zone and a cooling zone. The heating element is used to heat the heating zone. The temperature equalization element testing device also includes a cooling component, which is used to connect with the surface of the cooling zone and cool the cooling zone.

4. The temperature equalization component testing device according to claim 3, characterized in that, The phase change working fluid is configured to be able to switch between a gaseous state and a liquid state. The body portion has a first portion and at least one second portion, the first portion and the second portion being plate-shaped. At least one second portion is connected to at least one end of the first portion along a first direction and extends upward relative to the first portion along the direction of gravity. The first direction intersects the direction of gravity. The receiving cavity includes a first sub-cavity and a second sub-cavity that are interconnected. The first portion has the first sub-cavity, and the second portion has the second sub-cavity. The first part includes the heating zone, and the heating element is used to heat at least a portion of the first part. The second part includes the cooling zone, and the cooling assembly is used to cool at least a portion of the second part.

5. The temperature equalization component testing device according to claim 4, characterized in that, The heating element includes a heating film attached to the surface of the first part, or the heating element includes a battery cell assembly, which includes at least a plurality of battery cells arranged along the first direction and is supported on the first part.

6. The temperature equalization component testing device according to claim 4, characterized in that, The cooling assembly includes an air duct component and an air supply component. The air duct component is supported by the support component and is in contact with the second part. The air duct component has an air duct, and the air supply component is used to supply air to the air duct.

7. The temperature equalization component testing device according to claim 4, characterized in that, The temperature detection element includes multiple temperature sensors, which are arranged at intervals along the first direction and the second direction and are used to detect the temperature of the first part. The first direction, the second direction and the gravity direction intersect each other but are not coplanar.

8. The temperature equalization component testing apparatus according to any one of claims 1 to 7, characterized in that, The temperature equalization component testing device further includes a first valve, which is used to connect to the main body to block or open the opening.

9. The temperature equalization component testing apparatus according to any one of claims 1 to 7, characterized in that, The temperature equalization testing device further includes a temperature constant element, which has a temperature constant chamber. At least the heating element and the temperature detection element are housed in the temperature constant chamber, and the temperature constant chamber is also used to house the temperature equalization element.

10. The temperature equalization component testing apparatus according to any one of claims 1 to 7, characterized in that, The temperature equalization testing device further includes a pressure testing element, which is at least partially disposed within the receiving cavity and detects the pressure within the receiving cavity.

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