Battery Thermal Management Test System

Abstract

The present application relates to a battery thermal management test system, including a compressor, a condenser, a first heat exchanger and a first throttle valve; the outflow port of the first throttle valve is used to connect with the inflow port of the heat exchange channel of the cold plate in the battery to be tested, and the return port of the compressor is used to connect with the outflow port of the heat exchange channel of the cold plate in the battery to be tested; the first heat exchanger includes a first flow channel and a second flow channel; the outflow port of the condenser is connected to the inflow port of the first flow channel, and the outflow port of the first flow channel is connected to the inflow port of the first throttle valve; the battery thermal management test system also includes a temperature control mechanism, the outflow port of the temperature control mechanism is connected to the inflow port of the second flow channel, and the return port of the temperature control mechanism is connected to the outflow port of the second flow channel; the second heat exchange medium flowing through the second flow channel can cool down the first heat exchange medium flowing through the first flow channel. The above-mentioned battery thermal management test system is convenient for studying the influence of the first pure liquid heat exchange medium of different temperatures on the diversion effect of the heat exchange flow channel of the cold plate in the battery to be tested.

Description

Technical Field

[0001] The present application relates to the technical field of battery testing, and in particular to a battery thermal management testing system. Background Art

[0002] After the battery is produced, it is usually necessary to perform a thermal management test. In the related art, the battery thermal management test system usually includes a compressor, a condenser and a throttle valve connected in sequence, and the cold plate of the battery to be tested is connected between the outflow port of the throttle valve and the return port of the compressor to form a circulation loop.

[0003] However, after the heat exchange medium output by the compressor is condensed by the condenser, it usually enters the throttle valve in a two-phase state with dryness. Therefore, it is not convenient to study the influence of the pure liquid heat exchange medium on the diversion effect of the heat exchange flow channel of the cold plate of the battery to be tested. Utility Model Content

[0004] In view of the above problems, the present application provides a battery thermal management test system, which can input a pure liquid first heat exchange medium of different temperatures into the inlet of the first throttle valve, so as to facilitate the study of the influence of the pure liquid first heat exchange medium of different temperatures on the diversion effect of the heat exchange flow channel of the cold plate in the battery to be tested.

[0005] A battery thermal management test system provided by an embodiment of the present application includes a compressor, a condenser, a first heat exchanger and a first throttle valve connected in sequence through pipelines; an outflow port of the first throttle valve is used to connect with an inflow port of a heat exchange channel of a cold plate in a battery to be tested, and a return port of the compressor is used to connect with an outflow port of a heat exchange channel of a cold plate in a battery to be tested, so as to form a first circulation loop for circulating a first heat exchange medium;

[0006] Wherein, the first heat exchanger comprises a first flow channel and a second flow channel isolated from each other;

[0007] The outflow port of the condenser is connected to the inflow port of the first flow channel, and the outflow port of the first flow channel is connected to the inflow port of the first throttle valve;

[0008] The battery thermal management test system also includes a temperature regulating mechanism, the flow outlet of the temperature regulating mechanism is connected to the flow inlet of the second flow channel, and the return port of the temperature regulating mechanism is connected to the flow outlet of the second flow channel to form a temperature regulating loop for circulating the second heat exchange medium;

[0009] The temperature regulating mechanism is used to cool the second heat exchange medium so that the second heat exchange medium flowing through the second flow channel can reduce the temperature of the first heat exchange medium flowing through the first flow channel.

[0010] In the process of heat dissipation test of the battery under test in the above-mentioned battery thermal management test system, the first heat exchange medium flowing out of the compressor passes through the condenser, the first flow channel of the first heat exchanger and the first throttle valve in sequence, and the temperature and pressure drop, and then enters the heat exchange flow channel of the cold plate in the battery under test from the inlet, flows out through the outlet of the heat exchange flow channel of the cold plate and flows back into the compressor. The first heat exchange medium dissipates heat and cools the battery under test in the process of flowing through the heat exchange flow channel of the cold plate in the battery under test.

[0011] Compared with the traditional battery thermal management test system, the battery thermal management test system of the embodiment of the present application has a first heat exchanger added between the condenser and the first throttle valve. The second heat exchange medium flowing through the second flow channel of the first heat exchanger can cool down the first heat exchange medium flowing through the first flow channel, thereby further cooling down the first heat exchange medium after passing through the condenser, so that the first heat exchange medium can become a pure liquid before entering the first throttle valve. The temperature of the second heat exchange medium output to the second flow channel can be accurately and stably controlled by the temperature regulating mechanism, thereby accurately and stably controlling the temperature of the first heat exchange medium flowing through the first flow channel, and then inputting the pure liquid first heat exchange medium of different temperatures into the inlet of the first throttle valve, so as to facilitate the study of the influence of the pure liquid first heat exchange medium of different temperatures on the diversion effect of the heat exchange flow channel of the cold plate in the battery to be tested.

[0012] In one embodiment, the battery thermal management test system further includes a throttling pipeline, the throttling pipeline includes a first throttling main path, a second throttling main path and a plurality of throttling branches, the inlets of all throttling branches are connected to the outlet of the first flow channel through the first throttling main path, and the outlets of all throttling branches are connected to the inlet of the heat exchange channel of the cold plate in the battery to be tested through the second throttling main path;

[0013] There are multiple first throttle valves, and each throttle branch is provided with a corresponding first throttle valve;

[0014] Each throttling branch can selectively connect or disconnect the first throttling main path with the second throttling main path, so that the first throttling main path and the second throttling main path can be connected through any number of throttling branches.

[0015] In actual use, the required number of first throttle valves can be flexibly selected according to the load size of the battery to be tested, and the throttling branches corresponding to the required number of first throttle valves can be connected between the first throttling main path and the second throttling main path, so that the required number of first throttle valves can simultaneously throttle and reduce the pressure of the first heat exchange medium between the outflow outlet of the first channel of the first heat exchanger and the inflow inlet of the heat exchange flow channel of the cold plate in the battery to be tested. When it is not necessary to use the full number of first throttle valves, the throttling branches corresponding to a part of the first throttle valves can be cut off from the first throttling main path and the second throttling main path. In this way, the battery thermal management test system can be compatible with batteries to be tested with different loads.

[0016] In one embodiment, the battery thermal management test system further includes a plurality of first on-off valves, and each throttling branch is provided with a corresponding first on-off valve.

[0017] In one embodiment, a battery thermal management test system includes a throttling pipeline, an inlet of the throttling pipeline is connected to an outlet of a first flow channel, and an outlet of the throttling pipeline is connected to an inlet of a heat exchange channel of a cold plate in a battery to be tested; a first throttle valve is arranged on the throttling pipeline; and the number of the first throttle valve is one.

[0018] In this embodiment, by providing corresponding first on-off valves on each throttling branch, each throttling branch can be connected or disconnected between the first throttling main path and the second throttling main path in a convenient and flexible manner.

[0019] In one embodiment, the battery thermal management test system further includes a second throttle valve, the inlet of the second throttle valve is used to connect with the outlet of the heat exchange channel of the cold plate in the battery to be tested, and the outlet of the second throttle valve is used to connect with the return port of the compressor.

[0020] The pressure of the first heat exchange medium flowing out of the outlet of the battery to be tested can be flexibly adjusted through the second throttle valve, so that the influence of the first throttle valve on the pressure of the first heat exchange medium can be offset as much as possible through the adjustment of the second throttle valve, and the pressure of the first heat exchange medium flowing out of the outlet of the battery to be tested can be kept in the pressure operation comfort zone of the suction state of the compressor as much as possible.

[0021] In one embodiment, the battery thermal management test system further includes a second heat exchanger, the second heat exchanger including a third flow channel and a fourth flow channel isolated from each other;

[0022] The inlet of the third flow channel is connected to the outlet of the heat exchange flow channel of the cold plate in the battery to be tested, and the outlet of the third flow channel is connected to the return port of the compressor;

[0023] The fourth flow channel is used for the flow of the third heat exchange medium, and the third heat exchange medium is used for heating the first heat exchange medium flowing through the third flow channel.

[0024] In this embodiment, a second heat exchanger is arranged, and the third flow channel of the second heat exchanger is arranged between the return port of the compressor and the flow outlet of the heat exchange flow channel of the cold plate in the battery to be tested, and the first heat exchange medium flowing through the third flow channel is heated by the third heat exchange medium flowing through the fourth flow channel, so that the temperature of the first heat exchange medium in the third flow channel can be increased before entering the return port of the compressor, which is convenient for adjusting the temperature of the first heat exchange medium entering the return port of the compressor, and thus the suction state of the compressor can be kept in the temperature operating comfort zone as much as possible.

[0025] In one embodiment, the battery thermal management test system also includes a heating mechanism, the outlet of the heating mechanism is connected to the inlet of the fourth flow channel, and the return port of the heating mechanism is connected to the outlet of the fourth flow channel to form a heating circuit; the heating mechanism is used to heat the third heat exchange medium.

[0026] The third heat exchange medium is heated by the heating mechanism, so the outlet of the heating mechanism can output the third heat exchange medium with a higher temperature. During the process of the third heat exchange medium with a higher temperature flowing through the fourth flow channel, it can exchange heat with the first heat exchange medium flowing through the third flow channel, thereby heating and raising the temperature of the first heat exchange medium flowing through the third flow channel, thereby increasing the temperature of the first heat exchange medium after flowing through the third flow channel.

[0027] In one embodiment, the heating mechanism includes: a heating circulation pipeline, the outflow outlet of the heating circulation pipeline is connected to the inflow inlet of the fourth flow channel, and the reflux port of the heating circulation pipeline is connected to the outflow outlet of the fourth flow channel; a liquid storage container, the liquid storage container is arranged on the heating circulation pipeline and is used to store the third heat exchange medium; a heater, used to heat the third heat exchange medium in the liquid storage container; and a power component, used to drive the third heat exchange medium to circulate in the heating circuit.

[0028] In this embodiment, the heater can heat the third heat exchange medium in the liquid storage container in real time, and the power component can drive the third heat exchange medium to circulate in the heating circuit, so as to facilitate the accurate and stable control of the temperature of the third heat exchange medium through the heating mechanism, and then facilitate the accurate and stable control of the temperature of the first heat exchange medium that flows through the fourth flow channel and enters the return port of the compressor, so as to facilitate the suction state of the compressor to be in the temperature operating comfort zone.

[0029] In one embodiment, the battery thermal management test system further includes a second throttle valve, which is disposed on a connecting pipeline between an inlet of the third flow channel and an outlet of the heat exchange flow channel of the cold plate in the battery to be tested.

[0030] In this embodiment, not only a second heat exchanger is arranged between the outflow port of the heat exchange channel of the cold plate in the battery to be tested and the return port of the compressor, but also a second throttle valve is arranged between the outflow port of the heat exchange channel of the cold plate in the battery to be tested and the second heat exchanger. Therefore, for the first heat exchange medium before entering the return port of the compressor, not only the temperature can be adjusted by the second heat exchanger, but also the pressure can be adjusted by the second throttle valve, so that the suction state of the return port of the compressor can be better adjusted to be in the operating comfort zone.

[0031] In one embodiment, the temperature adjustment mechanism is a water cooler.

[0032] In one embodiment, the condenser is an air-cooled condenser.

[0033] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0035] Figure 1 Schematic diagram of a heat dissipation test loop of a battery thermal management test system according to some embodiments of the present application.

[0036] The reference numerals in the specific implementation manner are as follows:

[0037] 10. Battery to be tested;

[0038] 110. Compressor;

[0039] 120. Condenser;

[0040] 130. A first heat exchanger;

[0041] 140, first throttle valve;

[0042] 150, second throttle valve;

[0043] 160, second heat exchanger;

[0044] 170, throttling pipeline; 171, first throttling main road; 172, second throttling main road; 173, throttling branch road; 1731, first on-off valve;

[0045] 181, first pipeline; 182, second pipeline; 183, third pipeline; 184, fourth pipeline;

[0046] 210. Temperature regulating mechanism;

[0047] 220. Heating mechanism; 221. Heating circulation pipeline; 222. Liquid storage container; 223. Heater; 224. Power part. DETAILED DESCRIPTION

[0048] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0050] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0051] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0052] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0053] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0054] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0055] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0056] At present, from the perspective of market development, the application of batteries is becoming more and more extensive. Batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of battery application areas, its market demand is also constantly expanding.

[0057] After the battery is produced, it is usually necessary to perform a thermal management test. The battery thermal management test system in the related art usually includes a compressor, a condenser, and a throttle valve connected in sequence, and the cold plate of the battery to be tested is connected between the outflow port of the throttle valve and the return port of the compressor to form a circulation loop.

[0058] However, after the heat exchange medium output by the compressor is condensed by the condenser, it usually enters the throttle valve in a two-phase state with dryness, so it is not convenient to study the influence of the pure liquid heat exchange medium on the diversion effect of the heat exchange flow channel of the cold plate of the battery to be tested. The reason is that the condenser of the battery thermal management test system in the related technology generally adopts an air-cooled condenser, and the cooling capacity of the air-cooled condenser is limited. After the heat exchange medium output by the compressor passes through the air-cooled condenser, it can generally only output a heat exchange medium in a two-phase state with dryness. Therefore, it is impossible to input a pure liquid heat exchange medium into the inlet of the throttle valve, which makes it inconvenient to study the influence of the pure liquid heat exchange medium on the diversion effect of the heat exchange flow channel of the cold plate in the battery to be tested.

[0059] Based on the above considerations, the embodiment of the present application provides a battery thermal management test system, which outputs a second heat exchange medium with a lower temperature through a temperature regulating mechanism. The process of the second heat exchange medium flowing through the second flow channel cools the first heat exchange medium flowing through the first flow channel, so that the first heat exchange medium becomes a pure liquid after flowing through the first flow channel. Since the second heat exchange medium is cooled by the temperature regulating mechanism, and the first heat exchange medium is thermally cooled by the heat exchange between the second heat exchange medium and the first heat exchange medium, it is convenient to control the temperature of the first heat exchange medium before entering the first throttle valve, and then the pure liquid first heat exchange medium of different temperatures can be input to the inlet of the first throttle valve, which is convenient for studying the influence of the pure liquid first heat exchange medium of different temperatures on the diversion effect of the heat exchange flow channel of the cold plate in the battery to be tested.

[0060] Please refer to Figure 1 , Figure 1 A schematic diagram of a heat dissipation test circuit of a battery thermal management test system according to some embodiments of the present application is shown. A battery thermal management test system provided by an embodiment of the present application comprises a compressor 110, a condenser 120, a first heat exchanger 130 and a first throttle valve 140 connected in sequence through pipelines.

[0061] The outflow port of the first throttle valve 140 is used to be connected to the inflow port 11 of the heat exchange channel of the cold plate in the battery under test 10, and the return port of the compressor 110 is used to be connected to the outflow port 12 of the heat exchange channel of the cold plate in the battery under test 10, so as to form a first circulation loop for circulating the first heat exchange medium.

[0062] The first heat exchanger 130 includes a first flow channel and a second flow channel that are isolated from each other. The first flow channel and the second flow channel can perform heat exchange.

[0063] The battery thermal management test system also includes a temperature regulating mechanism 210, the outlet of the temperature regulating mechanism 210 is connected to the inlet of the second flow channel, and the return port of the temperature regulating mechanism 210 is connected to the outlet of the second flow channel to form a temperature regulating loop for circulating the second heat exchange medium. The temperature regulating mechanism 210 is used to cool the second heat exchange medium so that the second heat exchange medium flowing through the second flow channel can cool the first heat exchange medium flowing through the first flow channel.

[0064] It can be understood that the heat exchange channel of the cold plate in the battery under test 10 has an inlet 11 and an outlet 12. During the heat dissipation test of the battery under test by the above battery thermal management test system, the inlet 11 is used for the first heat exchange medium to flow in, and the outlet 12 is used for the first heat exchange medium to flow out.

[0065] The process of heat dissipation of the battery 10 under test by the above-mentioned battery thermal management test system is as follows: the compressor 110 outputs a gaseous first heat exchange medium; after being reduced in pressure and temperature by the condenser 120, the first heat exchange medium forms a two-phase state; after being cooled by the first heat exchanger 130, the first heat exchange medium becomes a pure liquid; after being reduced in pressure and temperature by the first throttle valve 140, the first heat exchange medium enters through the inlet 11 of the heat exchange channel of the cold plate in the battery 10 under test, and the temperature of the first heat exchange medium after flowing through the heat exchange flow channel of the cold plate of the battery 10 under test rises, and flows out through the outlet 12 of the heat exchange flow channel of the cold plate to flow back to the compressor 110, thereby realizing the circulation of the first heat exchange medium in the first circulation loop.

[0066] The first flow channel is used for the flow of a first heat exchange medium, and the second flow channel is used for the flow of a second heat exchange medium.

[0067] The outlet of the condenser 120 is connected to the inlet of the first flow channel, and the outlet of the first flow channel is connected to the inlet of the first throttle valve 140. Therefore, the first heat exchange medium flowing out of the condenser 120 flows through the first flow channel of the first heat exchanger 130 and then flows into the first throttle valve 140.

[0068] Specifically, Figure 1 As shown, the compressor 110 is connected to the condenser 120 via a first pipe 181. The outflow port of the condenser 120 is connected to the inflow port of the first flow channel via a second pipe 182.

[0069] The temperature regulating mechanism 210 is used to cool the second heat exchange medium. Therefore, the outlet of the temperature regulating mechanism 210 can output the second heat exchange medium at a relatively low temperature. When the second heat exchange medium at a relatively low temperature flows through the second flow channel, it can exchange heat with the first heat exchange medium flowing through the first flow channel, thereby cooling the first heat exchange medium flowing through the first flow channel, and further making the first heat exchange medium become a pure liquid after flowing through the first flow channel. Since the second heat exchange medium is cooled by the temperature regulating mechanism 210, and the first heat exchange medium is cooled by heat exchange between the second heat exchange medium and the first heat exchange medium, it is convenient to control the temperature of the first heat exchange medium before entering the first throttle valve 140.

[0070] Since the second heat exchange medium with a lower temperature cools the first heat exchange medium flowing through the first flow channel when flowing through the second flow channel, the temperature of the second heat exchange medium rises when flowing out from the flow outlet of the second flow channel, and flows back to the reflux port of the temperature control mechanism 210, and is cooled again by the temperature control mechanism 210 for recycling.

[0071] The first heat exchanger 130 is, for example, a plate heat exchanger, a shell and tube heat exchanger, etc. The temperature control mechanism 210 is, for example, a water chiller, which is a cooling water device that can provide constant temperature, constant flow, and constant pressure, so it can accurately control the temperature, pressure, and flow of the output cooling water.

[0072] In the process of heat dissipation test of the battery under test in the above-mentioned battery thermal management test system, the first heat exchange medium flowing out of the compressor 110 passes through the condenser 120, the first flow channel of the first heat exchanger 130 and the first throttle valve 140 in sequence, and the temperature and pressure drop, and then enters the heat exchange flow channel of the cold plate in the battery under test 10 from the inlet 11, flows out through the outlet 12 of the heat exchange flow channel of the cold plate and flows back into the compressor 110. In the process of flowing through the heat exchange flow channel of the cold plate in the battery under test 10, the first heat exchange medium dissipates heat and cools down the battery under test 10.

[0073] Compared with the traditional battery thermal management test system, the battery thermal management test system of the embodiment of the present application has a first heat exchanger 130 added between the condenser 120 and the first throttle valve 140. The second heat exchange medium flowing through the second flow channel of the first heat exchanger 130 can cool down the first heat exchange medium flowing through the first flow channel, thereby further cooling down the first heat exchange medium after passing through the condenser 120, so that the first heat exchange medium can become a pure liquid before entering the first throttle valve 140. The temperature control mechanism 210 can accurately and stably control the temperature of the second heat exchange medium output to the second flow channel, thereby accurately and stably controlling the temperature of the first heat exchange medium flowing through the first flow channel, and then inputting the pure liquid first heat exchange medium of different temperatures into the inlet of the first throttle valve 140, so as to facilitate the study of the influence of the pure liquid first heat exchange medium of different temperatures on the diversion effect of the heat exchange flow channel of the cold plate in the battery to be tested.

[0074] In one embodiment, the condenser 120 is an air-cooled condenser.

[0075] The air-cooled condenser condenses the first heat exchange medium by air cooling, thereby facilitating the control of the pressure of the first heat exchange medium before entering the first throttle valve 140 .

[0076] The first heat exchanger 130 facilitates controlling the temperature of the first heat exchange medium before the first throttle valve 140. Thus, the pressure and temperature of the first heat exchange medium before entering the first throttle valve 140 can be controlled by the condenser 120 and the first heat exchanger 130 respectively, and the pressure control and temperature control of the first heat exchange medium can be decoupled to a certain extent.

[0077] Please refer to Figure 1In one embodiment, the battery thermal management test system also includes a throttling pipeline 170, which includes a first throttling main path 171, a second throttling main path 172 and a plurality of throttling branches 173, the inlets of all throttling branches 173 are connected to the outlet of the first flow channel through the first throttling main path 171, and the outlets of all throttling branches 173 are connected to the inlet 11 of the heat exchange channel of the cold plate in the battery 10 to be tested through the second throttling main path 172.

[0078] Specifically, a plurality of throttling branches 173 are connected in parallel between the first throttling main path 171 and the second throttling main path 172. Figure 1 In the embodiment shown, two throttling branches 173 are connected in parallel. It is understandable that three, four or more throttling branches 173 may be connected in parallel.

[0079] There are multiple first throttle valves 140 , and each throttle branch 173 is provided with a corresponding first throttle valve 140 . Therefore, multiple first throttle valves 140 can be connected in parallel through their corresponding throttle branches 173 .

[0080] Each throttling branch 173 can selectively connect or disconnect the first throttling main path 171 and the second throttling main path 172 , so that the first throttling main path 171 and the second throttling main path 172 can be connected through any number of throttling branches 173 among the multiple throttling branches 173 .

[0081] Specifically, for any throttling branch 173, the throttling branch 173 can selectively connect or disconnect between the first throttling main path 171 and the second throttling main path 172. When a throttling branch 173 connects between the first throttling main path 171 and the second throttling main path 172, the first heat exchange medium from the outlet of the first channel of the first heat exchanger 130 can flow to the battery under test through the first throttling main path 171, the throttling branch 173 and the second throttling main path 172 in sequence, that is, it can flow to the battery under test after being reduced in pressure and temperature by the first throttling valve 140 on the throttling branch 173; on the contrary, when the throttling branch 173 disconnects between the first throttling main path 171 and the second throttling main path 172, the first heat exchange medium from the outlet of the first channel of the first heat exchanger 130 cannot flow to the battery under test through the throttling branch 173.

[0082] In actual use, the required number of first throttle valves 140 can be flexibly selected according to the load size of the battery 10 to be tested, and the throttling branches 173 corresponding to the required number of first throttle valves 140 can be connected between the first throttling main path 171 and the second throttling main path 172, so that the required number of first throttle valves 140 can simultaneously throttle and reduce the pressure of the first heat exchange medium between the outlet of the first channel of the first heat exchanger 130 and the inlet 11 of the heat exchange flow channel of the cold plate in the battery 10 to be tested. When it is not necessary to use the full number of first throttle valves 140, the throttling branches 173 corresponding to a part of the first throttle valves 140 can be cut off from the first throttling main path 171 and the second throttling main path 172. In this way, the battery thermal management test system can be compatible with batteries 10 to be tested with different loads.

[0083] Exemplarily, the plurality of throttling branches 173 and the plurality of first throttling valves 140 are arranged in a one-to-one correspondence.

[0084] In other optional embodiments, multiple first throttle valves 140 may also be arranged on one throttling branch 173 .

[0085] Please refer to Figure 1 In one embodiment, the battery thermal management test system further includes a plurality of first on-off valves 1731 , and each throttling branch 173 is provided with a corresponding first on-off valve 1731 .

[0086] Specifically, the throttling branch 173 corresponding to the first on-off valve 1731 can be opened or closed to achieve conduction or blocking, thereby achieving connection or disconnection of the throttling branch 173 corresponding to the first on-off valve 1731 between the first throttling main path 171 and the second throttling main path 172.

[0087] In this embodiment, by providing corresponding first on-off valves 1731 on each throttling branch 173 , each throttling branch 173 can be conveniently and flexibly connected or disconnected between the first throttling main path 171 and the second throttling main path 172 .

[0088] In other optional embodiments, the throttling branch 173 may not be provided with the first on-off valve 1731. For example, the two ends of each throttling branch 173 are detachably connected to the first throttling main path 171 and the second throttling main path 172. When the number of throttling branches 173 is actually selected, the excess number of throttling branches 173 can be removed from the first throttling main path 171 and the second throttling main path 172, so that the required number of throttling branches 173 can be conveniently selected.

[0089] In some other embodiments, the number of the first throttle valve 140 may also be one. The battery thermal management test system includes a throttle pipeline 170, the inlet of the throttle pipeline 170 is connected to the outlet of the first flow channel, and the outlet of the throttle pipeline 170 is connected to the inlet of the heat exchange channel of the cold plate in the battery to be tested 10. The first throttle valve 140 is arranged on the throttle pipeline 170.

[0090] In this way, the first heat exchange medium from the outlet of the first channel of the first heat exchanger 130 can pass through the first throttle valve 140 while flowing along the throttling pipeline 170, so that the first heat exchange medium can flow to the battery to be tested after being reduced in pressure and temperature by the first throttle valve 140.

[0091] Please refer to Figure 1 In one embodiment, the battery thermal management test system also includes a second throttle valve 150, the inlet of the second throttle valve 150 is used to connect with the outlet of the heat exchange channel of the cold plate in the battery 10 to be tested, and the outlet of the second throttle valve 150 is used to connect with the return port of the compressor 110.

[0092] The outflow port 12 of the battery to be tested 10 is connected to the return port of the compressor 110 via a pipeline, and the second throttle valve 150 is arranged on the pipeline.

[0093] The pressure of the first heat exchange medium flowing out of the outlet 12 of the battery to be tested 10 can be flexibly adjusted through the second throttle valve 150, so that the influence of the first throttle valve 140 on the pressure of the first heat exchange medium can be offset as much as possible through the adjustment of the second throttle valve 150, and the pressure of the first heat exchange medium flowing out of the outlet 12 of the battery to be tested 10 can be made to be in the pressure operation comfort zone of the suction state of the compressor 110 as much as possible.

[0094] Especially when there are multiple first throttle valves 140, the adjustment of the second throttle valve 150 can be adjusted according to the number of operating first throttle valves 140, so that the adjustment pressure of the second throttle valve 150 can offset the influence of multiple simultaneously operating first throttle valves 140 on the pressure of the first heat exchange medium as much as possible.

[0095] Please refer to Figure 1 In one embodiment, the battery thermal management test system further includes a second heat exchanger 160 , and the second heat exchanger 160 includes a third flow channel and a fourth flow channel isolated from each other.

[0096] The inlet of the third flow channel is connected to the outlet 12 of the heat exchange flow channel of the cold plate in the battery under test 10, and the outlet of the third flow channel is connected to the return port of the compressor 110. Therefore, the first heat exchange medium flowing out of the outlet 12 of the heat exchange flow channel of the cold plate in the battery under test 10 flows through the third flow channel of the second heat exchanger 160, and then flows back to the compressor 110 from the outlet of the third flow channel.

[0097] The fourth flow channel is used for the flow of the third heat exchange medium, and the third heat exchange medium is used to heat the first heat exchange medium flowing through the third flow channel. By continuously passing the third heat exchange medium in and out of the fourth flow channel, the third heat exchange medium flowing through the fourth flow channel heats the first heat exchange medium flowing through the third flow channel.

[0098] In this embodiment, a second heat exchanger 160 is provided, and the third flow channel of the second heat exchanger 160 is provided between the return port of the compressor 110 and the outflow port 12 of the heat exchange flow channel of the cold plate in the battery 10 to be tested, and the first heat exchange medium flowing through the third flow channel is heated by the third heat exchange medium flowing through the fourth flow channel, so that the temperature of the first heat exchange medium in the third flow channel can be increased before entering the return port of the compressor 110, so that the temperature of the first heat exchange medium entering the return port of the compressor 110 can be conveniently adjusted, and the suction state of the compressor 110 can be kept in the temperature operating comfort zone as much as possible.

[0099] Compared with the pressure, the temperature of the first heat exchange medium has a greater impact on the intake state of the compressor 110. In this embodiment, since the second heat exchanger 160 is arranged between the return port of the compressor 110 and the outflow port 12 of the heat exchange flow channel of the cold plate in the battery 10 to be tested, the first heat exchange medium before entering the return port of the compressor 110 can be adjusted according to the different loads of the battery 10 to be tested, so that the battery thermal management test system can be in the temperature operation comfort zone of the intake state for the batteries 10 to be tested with different loads.

[0100] Please refer to Figure 1 In one embodiment, the battery thermal management test system further includes a second throttle valve 150. The second throttle valve 150 is disposed on a connecting pipeline between the outlet 12 of the heat exchange channel of the cold plate in the battery 10 to be tested and the inlet of the third channel of the second heat exchanger 160.

[0101] Specifically, Figure 1 As shown, the pipeline between the outflow port 12 of the battery to be tested 10 and the return port of the compressor 110 includes a third pipeline 183 and a fourth pipeline 184 .

[0102] The outlet 12 of the heat exchange channel of the cold plate in the battery under test 10 is connected to the inlet of the third channel of the second heat exchanger 160 via the third pipeline 183. The second throttle valve 150 is disposed on the third pipeline 183.

[0103] The outflow port of the third flow channel of the second heat exchanger 160 and the return port of the compressor 110 are connected via a fourth pipe 184 .

[0104] In this embodiment, not only is a second heat exchanger 160 provided between the outflow port 12 of the heat exchange channel of the cold plate in the battery 10 to be tested and the return port of the compressor 110, but a second throttle valve 150 is also provided between the outflow port 12 of the heat exchange channel of the cold plate in the battery 10 to be tested and the second heat exchanger 160. Therefore, the first heat exchange medium before entering the return port of the compressor 110 can be not only temperature-regulated by the second heat exchanger 160, but also pressure-regulated by the second throttle valve 150, thereby being able to better regulate the suction state of the return port of the compressor 110 to be in the operating comfort zone.

[0105] In some other optional embodiments, the battery thermal management test system may not include the second heat exchanger, and the battery thermal management system may not include the fourth pipeline. The outlet 12 of the heat exchange flow channel of the cold plate in the battery to be tested 10 is connected to the return port of the compressor 110 through the third pipeline, and the second throttle valve is arranged on the third pipeline.

[0106] In some other optional embodiments, the battery thermal management test system may not include the second throttle valve 150 , that is, the second throttle valve is not provided on the third pipeline.

[0107] Please refer to Figure 1 In one embodiment, the battery thermal management test system further includes a heating mechanism 220, the outlet of the heating mechanism 220 is connected to the inlet of the fourth flow channel, and the return port of the heating mechanism 220 is connected to the outlet of the fourth flow channel to form a heating loop. The heating mechanism 220 is used to heat the third heat exchange medium.

[0108] The third heat exchange medium is heated by the heating mechanism 220, so the outlet of the heating mechanism 220 can output the third heat exchange medium with a higher temperature. When the third heat exchange medium with a higher temperature flows through the fourth flow channel, it can exchange heat with the first heat exchange medium flowing through the third flow channel, so that the first heat exchange medium flowing through the third flow channel can be heated and heated, thereby increasing the temperature of the first heat exchange medium after flowing through the third flow channel. Since the third heat exchange medium with a higher temperature heats the first heat exchange medium flowing through the third flow channel when flowing through the fourth flow channel, the temperature of the third heat exchange medium decreases when it flows out of the outlet of the fourth flow channel, and flows back to the reflux port of the heating mechanism 220, and is heated again by the heating mechanism 220 for recycling.

[0109] In this embodiment, a heating mechanism 220 is provided to form a heating circuit. The heating mechanism 220 heats the third heat exchange medium and the third heat exchange medium can circulate in the heating circuit, thereby facilitating accurate control of the temperature of the third heat exchange medium flowing through the fourth flow channel, and further facilitating accurate control of the temperature of the first heat exchange medium flowing through the third flow channel.

[0110] Please refer to Figure 1In one embodiment, the heating mechanism 220 includes a heating circulation pipeline 221, a liquid storage container 222, a heater 223 and a power member 224. The outlet of the heating circulation pipeline 221 is connected to the inlet of the fourth flow channel, and the reflux port of the heating circulation pipeline 221 is connected to the outlet of the fourth flow channel.

[0111] The liquid storage container 222 is provided on the heating circulation pipeline 221 and is used to store the third heat exchange medium. The heater 223 is used to heat the third heat exchange medium in the liquid storage container 222. The power member 224 is provided on the heating circulation pipeline 221 and is used to drive the third heat exchange medium to circulate in the heating circuit.

[0112] For example, the heater 223 may be an electric heater that generates heat by powering on. The heater 223 may extend into the liquid storage container 222 to heat the third heat exchange medium, or may be a heater 223 that is coated on the outer wall of the liquid storage container 222. The power member 224 is, for example, a circulating pump.

[0113] Specifically, the liquid storage container 222 has an outflow port and a reflux port, and the outflow port and the reflux port of the liquid storage container 222 are respectively connected to the heating circulation pipeline 221. The liquid flow pressure provided by the power member 224 can make the third heat exchange medium in the liquid storage container 222 enter the heating circulation pipeline 221 from the outflow port of the liquid storage container 222, and then flow from the outflow port of the heating circulation pipeline 221 to the fourth flow channel, and then flow back to the reflux port of the heating circulation pipeline 221 after passing through the fourth flow channel.

[0114] In this embodiment, the third heat exchange medium in the liquid storage container 222 can be heated in real time by the heater 223, and the third heat exchange medium can be driven to circulate in the heating circuit by the power component 224, so as to facilitate the accurate and stable control of the temperature of the third heat exchange medium through the heating mechanism 220, and further facilitate the accurate and stable control of the temperature of the first heat exchange medium that flows through the fourth flow channel and enters the return port of the compressor 110, so as to facilitate the suction state of the compressor 110 to be in the temperature operating comfort zone.

[0115] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery thermal management test system, characterized in that: The battery thermal management test system comprises a compressor (110), a condenser (120), a first heat exchanger (130) and a first throttle valve (140) which are connected in sequence through pipelines; the outflow port of the first throttle valve (140) is used to connect to the inflow port (11) of the heat exchange channel of the cold plate in the battery to be tested (10), and the return port of the compressor (110) is used to connect to the outflow port (12) of the heat exchange channel of the cold plate in the battery to be tested (10), so as to form a first circulation loop for circulating a first heat exchange medium; Wherein, the first heat exchanger (130) comprises a first flow channel and a second flow channel isolated from each other; The outflow port of the condenser (120) is connected to the inflow port of the first flow channel, and the outflow port of the first flow channel is connected to the inflow port of the first throttle valve (140); The battery thermal management test system further comprises a temperature regulating mechanism (210), an outflow port of the temperature regulating mechanism (210) being connected to an inflow port of the second flow channel, and a reflux port of the temperature regulating mechanism (210) being connected to an outflow port of the second flow channel, so as to form a temperature regulating loop for circulating a second heat exchange medium; The temperature adjustment mechanism (210) is used to cool the second heat exchange medium, so that the second heat exchange medium flowing through the second flow channel can reduce the temperature of the first heat exchange medium flowing through the first flow channel.

2. The battery thermal management test system according to claim 1, characterized in that: The battery thermal management test system further comprises a throttling pipeline (170), wherein the throttling pipeline (170) comprises a first throttling main path (171), a second throttling main path (172) and a plurality of throttling branches (173), wherein the inlets of all the throttling branches (173) are connected to the outlet of the first flow channel via the first throttling main path (171), and the outlets of all the throttling branches (173) are connected to the inlet (11) of the heat exchange channel of the cold plate in the battery (10) to be tested via the second throttling main path (172); There are a plurality of the first throttle valves (140), and each of the throttle branches (173) is provided with a corresponding first throttle valve (140); Each of the throttling branches (173) can selectively connect or disconnect the first throttling main path (171) and the second throttling main path (172), so that the first throttling main path (171) and the second throttling main path (172) can be connected through any number of the throttling branches (173).

3. The battery thermal management test system according to claim 2, characterized in that: The battery thermal management test system further comprises a plurality of first on-off valves (1731), and each of the throttling branches (173) is provided with a corresponding first on-off valve (1731).

4. The battery thermal management test system according to claim 1, characterized in that: The battery thermal management test system comprises a throttling pipeline (170), the inlet of the throttling pipeline (170) being connected to the outlet of the first flow channel, and the outlet of the throttling pipeline (170) being connected to the inlet (11) of the heat exchange channel of the cold plate in the battery to be tested (10); the first throttling valve (140) being arranged on the throttling pipeline (170); and the number of the first throttling valve (140) is one.

5. The battery thermal management test system according to claim 1, characterized in that: The battery thermal management test system further comprises a second throttle valve (150), wherein an inlet of the second throttle valve (150) is used to be connected to an outlet of a heat exchange channel of a cold plate in a battery to be tested (10), and an outlet of the second throttle valve (150) is used to be connected to a return port of the compressor (110).

6. The battery thermal management test system according to claim 1, characterized in that: The battery thermal management test system further comprises a second heat exchanger (160), wherein the second heat exchanger (160) comprises a third flow channel and a fourth flow channel isolated from each other; The inlet of the third flow channel is connected to the outlet (12) of the heat exchange flow channel of the cold plate in the battery to be tested (10), and the outlet of the third flow channel is connected to the return port of the compressor (110); The fourth flow channel is used for a third heat exchange medium to flow, and the third heat exchange medium is used to heat the first heat exchange medium flowing through the third flow channel.

7. The battery thermal management test system according to claim 6, characterized in that: The battery thermal management test system further comprises a heating mechanism (220), the outlet of the heating mechanism (220) being connected to the inlet of the fourth flow channel, and the return port of the heating mechanism (220) being connected to the outlet of the fourth flow channel to form a heating loop; the heating mechanism (220) is used to heat the third heat exchange medium.

8. The battery thermal management test system according to claim 7, characterized in that: The heating mechanism (220) comprises: A heating circulation pipeline (221), wherein the outflow outlet of the heating circulation pipeline (221) is connected to the inflow outlet of the fourth flow channel, and the reflux outlet of the heating circulation pipeline (221) is connected to the outflow outlet of the fourth flow channel; a liquid storage container (222), the liquid storage container (222) being arranged on the heating circulation pipeline (221) and being used to store the third heat exchange medium; a heater (223), used to heat the third heat exchange medium in the liquid storage container (222); and A power component (224) is used to drive the third heat exchange medium to circulate in the heating circuit.

9. The battery thermal management test system according to claim 6, characterized in that: The battery thermal management test system further comprises a second throttle valve (150), the second throttle valve (150) being arranged on a connecting pipeline between an inlet of the third flow channel and an outlet (12) of a heat exchange flow channel of a cold plate in the battery to be tested (10).

10. The battery thermal management test system according to claim 1, characterized in that: The temperature adjustment mechanism (210) is a water cooler.

11. The battery thermal management test system according to claim 1, characterized in that: The condenser (120) is an air-cooled condenser.

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