Liquid temperature detection device and method, energy storage device, energy storage system, chip, medium and program product

Abstract

The embodiment of the invention provides a liquid temperature detection device and method, an energy storage device, an energy storage system, a chip, a medium and a program product, one end of a liquid inlet pipe is connected with a liquid outlet of a liquid cooling unit, the other end of the liquid inlet pipe is connected with a liquid inlet of a battery device, one end of a liquid outlet pipe is connected with a liquid inlet of the liquid cooling unit, and the other end of the liquid outlet pipe is connected with a liquid outlet of the battery device. The communicating pipe is used for communicating the liquid outlet pipe with the liquid inlet pipe, and the temperature sensing connecting pipe is arranged on a pipeline of the liquid inlet pipe, the liquid outlet pipe and the communicating pipe and used for obtaining the temperature value of the pipeline; and the on-off device is used for controlling on-off of at least one of the liquid outlet pipe, the liquid inlet pipe and the communicating pipe according to the temperature value. The temperature of liquid in the pipeline in the liquid temperature detection device can be quickly calibrated, and the accuracy and reliability of liquid temperature detection in the pipeline are improved.

Description

Technical Field

[0001] The present application relates to the field of energy storage, and more specifically, to a liquid temperature detection device, method, energy storage device, energy storage system, chip, medium and program product. Background Art

[0002] As the world increases its support for the development of new energy technologies, various technologies related to energy storage have been widely used. In order to meet the needs of large-capacity energy storage devices, temperature control of energy storage devices is also particularly important. Therefore, how to accurately control the temperature of energy storage systems is an urgent problem to be solved. Summary of the invention

[0003] The embodiments of the present application provide a liquid temperature detection device, method, energy storage device, energy storage system, chip, medium and program product, which can quickly calibrate the temperature of the liquid in the pipeline in the liquid temperature detection device and improve the accuracy and reliability of liquid temperature detection in the pipeline.

[0004] In the first aspect, the present application provides a liquid temperature detection device, including: a liquid inlet pipe, one end of which is connected to the liquid outlet of a liquid cooling unit, and the other end is connected to the liquid inlet of a battery device, a liquid outlet pipe, one end of which is connected to the liquid inlet of the liquid cooling unit, and the other end is connected to the liquid outlet of the battery device, a connecting pipe, which is used to connect the liquid outlet pipe and the liquid inlet pipe, a temperature-sensing connecting pipe, which is arranged on the pipes of the liquid inlet pipe, the liquid outlet pipe and the connecting pipe, and is used to obtain the temperature value of the pipe; and an on-off device, which is used to control the on-off of at least one of the liquid outlet pipe, the liquid inlet pipe and the connecting pipe according to the temperature value.

[0005] In the technical solution of the embodiment of the present application, the on-off of the liquid outlet pipe, the liquid inlet pipe and the connecting pipe is controlled by an on-off device, and the temperature of the liquid between the various pipes is quickly adjusted so that the temperature of the liquid in the pipes remains consistent. More specifically, the liquid inlet pipe is relatively long, and the temperature of the liquid may change during the transmission process, or the temperature of the liquid between the input port and the output port of the battery device may change. Through the control of the on-off device, the temperature of the liquid in the pipe can be kept consistent. In addition, by controlling and adjusting the temperature of the pipe through the on-off device, the accuracy and reliability of the liquid temperature detection in the pipe can be improved.

[0006] In some embodiments, the on-off device includes a first on-off device, which is arranged on the pipe of the connecting pipe, a second on-off device, which is arranged on the pipe of the liquid outlet pipe close to the battery device, and a third on-off device, which is arranged on the pipe of the liquid inlet pipe close to the battery device.

[0007] In the technical solution of the embodiment of the present application, three on-off devices are used to respectively control the on-off of the liquid outlet pipe, the liquid inlet pipe and the connecting pipe, and adjust the temperature of the liquid between the various pipes, so that the temperature of the liquid in the pipes of the liquid outlet pipe and the liquid inlet pipe remains consistent. In addition, the temperature of the pipes is respectively controlled and adjusted by the three on-off devices, and the temperature of the liquid in the pipe in the liquid temperature detection device can be quickly calibrated through the reflux of the connecting pipe, thereby improving the accuracy and reliability of the liquid temperature detection in the pipes of the liquid outlet pipe and the liquid inlet pipe.

[0008] In some embodiments, the temperature sensing connecting tube includes: a first temperature sensing connecting tube, which is arranged on a pipe of the liquid inlet pipe close to the battery device, and is used to obtain a first temperature value; a second temperature sensing connecting tube, which is arranged on a pipe of the liquid inlet pipe close to the liquid cooling unit, and is used to obtain a second temperature value.

[0009] In the technical solution of the embodiment of the present application, by arranging multiple temperature-sensing connecting tubes near the liquid outlet pipe and the liquid inlet pipe close to the battery device and the liquid cooling unit, and detecting the temperature of the pipeline through multiple temperature-sensing connecting tubes, the temperature of the liquid in the pipeline can be detected more accurately, thereby improving the accuracy and reliability of the liquid temperature detection in the pipeline.

[0010] In some embodiments, when the first temperature value and the second temperature value are different, the first on-off device is used to control the conduction of the connecting pipe, the second on-off device is used to control the disconnection of the liquid outlet pipe, and the third on-off device is used to control the disconnection of the liquid inlet pipe; or, when the first temperature value and the second temperature value are the same, the first on-off device is used to control the disconnection of the connecting pipe, the second on-off device is used to control the conduction of the liquid outlet pipe, and the third on-off device is used to control the conduction of the liquid inlet pipe.

[0011] In the technical solution of the embodiment of the present application, when the first temperature value and the second temperature value are different, that is, when there is liquid residual in the water cooling plate in the battery device, the connecting pipe is controlled to be conductive, the liquid outlet pipe and the liquid inlet pipe are disconnected, and the liquid quickly refluxes so that the first temperature value and the second temperature value are the same.

[0012] In some embodiments, the temperature sensing connecting tube further includes: a third temperature sensing connecting tube, which is disposed on a pipe of the liquid outlet pipe close to the battery device and is used to obtain a third temperature value.

[0013] In some embodiments, when the first temperature value and the third temperature value are different, the first on-off device is used to control the disconnection of the connecting pipe, the second on-off device is used to control the conduction of the liquid outlet pipe, and the third on-off device is used to control the conduction of the liquid inlet pipe.

[0014] In the technical solution of the embodiment of the present application, when the first temperature value and the third temperature value are different, that is, when there is residual liquid in the pipeline of the liquid inlet pipe, the connecting pipe is controlled to be disconnected, the liquid outlet pipe and the liquid inlet pipe are connected, and the liquid refluxes so that the first temperature value and the third temperature value are the same.

[0015] In some embodiments, the temperature sensing connecting tube includes: a straight tube, a first matching part and a second matching part connected to the pipeline, which are arranged at both ends of the straight tube, and the tube diameters of the first matching part and the second matching part gradually increase in the axial direction of the straight tube. The temperature sensor is arranged on the inner wall of the straight tube to detect the temperature of the liquid flowing through the straight tube.

[0016] In the technical solution of the embodiment of the present application, by setting a first matching part and a second matching part at both ends of the straight pipe, a quick-plug connection can be made with soft and hard pipes of various diameters of the liquid temperature detection device, thereby improving the flexibility of the liquid temperature detection process and allowing the temperature sensor to be replaced when a failure occurs.

[0017] In some embodiments, the straight tube, the first matching portion, and the second matching portion in the temperature sensing connecting tube are made of polyvinyl chloride.

[0018] In the technical solution of the embodiment of the present application, the material of the temperature sensing connecting pipe is set to polyvinyl chloride, so that the temperature sensing connecting pipe has good flexibility and can be easily bent, and can be matched and connected with different pipelines.

[0019] In some embodiments, the on-off device includes: a hollow tube for liquid to flow through the pipeline; a closure for limiting the flow of liquid through the pipeline; a driver, which is arranged between the hollow tube and the closure and rotates around the axis of the driver to connect the hollow tube or the closure to the pipeline.

[0020] In the technical solution of the embodiment of the present application, the driver in the conversion control module drives the switching of the hollow tube and the closure member, thereby controlling the on-off of the pipeline and adjusting the temperature of the liquid between the pipelines, so that the temperature of the liquid in the pipeline remains consistent. In addition, the accuracy and reliability of the liquid temperature detection in the pipeline can be improved by controlling and adjusting the temperature of the pipeline through the on-off device.

[0021] In the second aspect, the present application provides a liquid temperature detection method, including: obtaining a temperature value, the temperature value is used to characterize the temperature of any one or more pipes in the liquid outlet pipe, liquid inlet pipe or connecting pipe, and according to the temperature value, controlling the on and off of one or more of the liquid outlet pipe, liquid inlet pipe and connecting pipe.

[0022] In the technical solution of the embodiment of the present application, the on-off of the liquid outlet pipe, the liquid inlet pipe and the connecting pipe is controlled by an on-off device, and the temperature of the liquid between each pipe is adjusted so that the temperature of the liquid in the pipe remains consistent. More specifically, the liquid inlet pipe is relatively long, and the temperature of the liquid may change during the transmission process, or the temperature of the liquid between the input port and the output port of the battery device may change. Through the control of the on-off device, the connecting pipe can quickly reflux to keep the temperature of the liquid in the pipe consistent. In addition, the accuracy and reliability of the liquid temperature detection in the pipe can be improved by controlling and adjusting the temperature of the pipe by the on-off device.

[0023] In some embodiments, the temperature value includes a first temperature value, a second temperature value and a third temperature value, the first temperature value is used to characterize the temperature of the liquid inlet pipe close to the battery device, the second temperature value is used to characterize the temperature of the liquid inlet pipe close to the liquid cooling unit, and the third temperature value is used to characterize the temperature of the liquid outlet pipe close to the battery device, one end of the liquid inlet pipe is connected to the liquid outlet of the liquid cooling unit, and the other end is connected to the liquid inlet of the battery device, one end of the liquid outlet pipe is connected to the liquid inlet of the liquid cooling unit, and the other end is connected to the liquid outlet of the battery device.

[0024] In some embodiments, obtaining temperature values ​​includes: responding to a test preparation instruction; obtaining a first temperature value and a second temperature value, and / or obtaining a first temperature value and a third temperature value according to the test preparation instruction; when the first temperature value and the second temperature value are the same, and / or when the first temperature value and the third temperature value are the same, confirming that test preparation is complete.

[0025] In the technical solution of the embodiment of the present application, after obtaining the test preparation instruction, the first temperature value and the second temperature value are obtained, aiming to detect the temperature at both ends of the liquid inlet pipe to remove the accumulated liquid, and finally after the accumulated liquid is removed, when the first temperature and the second temperature are the same, the test preparation is confirmed to be completed. Similarly, the first temperature value and the third temperature value are obtained, aiming to detect the temperature at both ends of the battery device to remove the accumulated liquid in the battery device, making the liquid temperature detection process more accurate.

[0026] In some embodiments, obtaining the temperature value includes: responding to a test instruction; and obtaining a first temperature value and a second temperature value according to the test instruction.

[0027] In the technical solution of the embodiment of the present application, after receiving the test instruction, the temperatures of both ends of the liquid inlet pipe are obtained to remove the accumulated liquid, making the liquid temperature detection process more accurate.

[0028] In some embodiments, one or more of the liquid outlet pipe, the liquid inlet pipe and the connecting pipe are controlled to be on and off according to the temperature value, including: when the first temperature value and the second temperature value are different, the liquid outlet pipe and the liquid inlet pipe are controlled to be disconnected, and the connecting pipe is controlled to be connected; or, when the first temperature value and the second temperature value are the same, the liquid outlet pipe and the liquid inlet pipe are controlled to be connected, and the connecting pipe is controlled to be disconnected.

[0029] In the technical solution of the embodiment of the present application, during the test process, if the temperatures at both ends of the liquid inlet pipe are different due to problems such as being too long, the liquid outlet pipe and the liquid inlet pipe can be disconnected, and the connecting pipe can be controlled to be conductive, so that the liquid can quickly reflux through the connecting pipe, thereby making the temperatures at both ends of the liquid inlet pipe consistent.

[0030] In some embodiments, obtaining the temperature value includes: responding to a test suspension instruction; and obtaining the first temperature value and the third temperature value according to the test suspension instruction.

[0031] In the technical solution of the embodiment of the present application, when a pause occurs during the detection process, it is necessary to detect whether the temperatures at both ends of the battery device are consistent, so the first temperature value and the third temperature value are obtained to make the detection more accurate.

[0032] In some embodiments, one or more of the liquid outlet pipe, the liquid inlet pipe and the connecting pipe are controlled to be turned on and off according to the temperature value, including: when the first temperature value and the third temperature value are different, the liquid outlet pipe and the liquid inlet pipe are controlled to be turned on and the connecting pipe is controlled to be turned off.

[0033] In a third aspect, the present application provides a chip, comprising: a processor, for calling and running a computer program from a memory, so that a device equipped with the chip executes the liquid temperature detection method as described in the second aspect or any one of the embodiments of the second aspect.

[0034] In a fourth aspect, the present application provides a computer-readable storage medium, comprising: a computer program is stored on the computer-readable storage medium, and when the computer program runs on a computer, the computer executes the liquid temperature detection method as described in the second aspect or any one of the embodiments of the second aspect.

[0035] In a fifth aspect, the present application provides a computer program product, comprising a computer program product for executing the liquid temperature detection method as described in the second aspect or any one embodiment of the second aspect.

[0036] In a sixth aspect, the present application provides an energy storage device, comprising a liquid cooling unit, a battery device, and a liquid temperature detection device as described in the first aspect or any one embodiment of the first aspect, wherein the liquid temperature detection device is used to connect the liquid cooling unit and the battery device and adjust the temperature between the liquid cooling unit and the battery device.

[0037] In a seventh aspect, the present application provides an energy storage system, comprising a power conversion device and the energy storage device as described in the sixth aspect, wherein the power conversion device is used to electrically connect the power generation device and the energy storage device. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 A partial structural schematic diagram of a battery device provided in an embodiment of the present application is shown.

[0039] Figure 2 A schematic structural diagram of a liquid temperature detection device provided in an embodiment of the present application is shown.

[0040] Figure 3 A schematic structural diagram of another liquid temperature detection device provided in an embodiment of the present application is shown.

[0041] Figure 4 A partial structural schematic diagram of a liquid temperature detection device provided in an embodiment of the present application is shown.

[0042] Figure 5 A schematic structural diagram of a temperature sensing connecting pipe provided in an embodiment of the present application is shown.

[0043] Figure 6 A schematic structural diagram of a switching device provided in an embodiment of the present application is shown.

[0044] Figure 7 A schematic flow chart of a liquid temperature detection method provided in an embodiment of the present application is shown.

[0045] Figure 8 A schematic flow chart of another liquid temperature detection method provided in an embodiment of the present application is shown.

[0046] Fig. 9 A schematic flow chart of another liquid temperature detection method provided in an embodiment of the present application is shown.

[0047] Fig.10 A schematic flow chart of another liquid temperature detection method provided in an embodiment of the present application is shown.

[0048] Reference numerals: Battery device 10, box body 11, battery cell 12, first box body part 111, second box body part 112, liquid temperature detection device 20, liquid inlet pipe 21, liquid outlet pipe 22, connecting pipe 23, on-off device 24, first on-off device 241, second on-off device 242, third on-off device 243, hollow tube 244, driver 245, closure 246, temperature-sensing connecting tube 25, first temperature-sensing connecting tube 251, second temperature-sensing connecting tube 252, third temperature-sensing connecting tube 253, fourth temperature-sensing connecting tube 254, straight tube 255, first matching part 256, second matching part 257, liquid cooling unit 30.

[0049] In the drawings, the drawings are not drawn to scale. DETAILED DESCRIPTION

[0050] The following detailed description and drawings of the embodiments of the present application are used to illustrate the principles of the present application, but cannot be used to limit the scope of the present application, that is, the present application is not limited to the described embodiments.

[0051] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as those commonly understood by technicians in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0052] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of this application. In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0053] Reference to "embodiments" in this application 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 in this application may be combined with other embodiments.

[0054] The term "multiple" as used in the present application refers to more than two (including two). Similarly, the term "multiple groups" refers to more than two groups (including two groups), and the term "multiple sheets" refers to more than two sheets (including two sheets).

[0055] Unless otherwise specified, all embodiments and optional embodiments of the present application can be combined with each other to form a new technical solution.

[0056] Unless otherwise specified, all technical features and optional technical features of this application can be combined with each other to form a new technical solution.

[0057] If there is no special explanation, all steps of the present application can be performed sequentially or randomly, preferably sequentially. For example, the method includes steps (a) and (b), which means that the method may include steps (a) and (b) performed sequentially, or may include steps (b) and (a) performed sequentially. For example, it is mentioned that the method may also include step (c), which means that step (c) can be added to the method in any order. For example, the method may include steps (a), (b) and (c), or may include steps (a), (c) and (b), or may include steps (c), (a) and (b), etc.

[0058] The battery apparatus mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include multiple battery cells, which are connected in series, in parallel or in mixed connection through a busbar component.

[0059] In some embodiments, a battery cell assembly is generally formed by arranging a plurality of battery cells.

[0060] As an example, the battery cell assembly may be a battery module, which is formed by arranging and fixing a plurality of battery cells to form an independent module. As an example, the battery module may be formed by bundling a plurality of battery cells by a cable tie.

[0061] In some embodiments, the battery device may be a battery pack, which includes a box and one or more battery cell assemblies, wherein the battery cell assemblies are accommodated in the box.

[0062] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box by fixing the battery module in the box.

[0063] As an example, the battery cell assembly may also be housed in the case by directly fixing a plurality of battery cells to the case.

[0064] As an example, the box may include a first box and a second box. The first box and the second box are buckled together to form a closed space inside the box to accommodate the battery cell assembly. The closed here means covered or disconnected, which can be sealed or unsealed. The first box can be a top cover or a bottom plate.

[0065] As an example, the box body may include a top cover, a frame and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that a closed space is formed inside the box body to accommodate the battery cell assembly.

[0066] The embodiment of the present application provides an energy storage device, including one or more battery clusters (Battery Cluster) to increase the voltage and capacity of the energy storage device. The battery cluster may include multiple battery devices, and the multiple battery devices are connected in series through a busbar component to increase the voltage of the energy storage device. When the energy storage device includes multiple battery clusters, the multiple battery clusters are connected in parallel to increase the capacity of the energy storage device.

[0067] The energy storage device can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems or temporary power supply systems. The energy storage device can store electrical energy as needed and output electrical energy at an appropriate time. For example, the energy storage device can store electrical energy during low power consumption and provide electrical energy to relevant users or electrical equipment during peak power consumption. The energy storage system provided in the embodiment of the present application can be any power system that requires the use of an energy storage device.

[0068] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0069] In some embodiments, the energy storage device may include a cabinet and one or more battery clusters, wherein the battery clusters are housed in the cabinet.

[0070] In some embodiments, the energy storage device may include modules such as a thermal management module, a main control module, a master control module, a power distribution module, and a fire protection module.

[0071] As an example, the thermal management module may include a liquid cooling unit that provides cooling liquid for regulating the temperature of the battery cells to each battery device through a pipeline.

[0072] In some embodiments, the energy storage system may include one or more energy storage devices and a power converter system (PCS), and the power converter is used to connect between the power generation equipment and the energy storage device. The power generation equipment is used to generate electrical energy, and the electrical energy generated by the power generation equipment can be stored in the energy storage device through the power conversion device. As an example, the power generation equipment may specifically be a solar panel, a hydropower generation equipment, a thermal power generation equipment, a wind power generation equipment, etc. Among them, the specific type of the power generation equipment is not limited in this application.

[0073] The energy storage system generates a large amount of heat during the charging and discharging process. If thermal management is not performed in time, the battery temperature will rise, resulting in a decrease in battery performance, shortened life, and even potential safety hazards. Liquid cooling units, as a highly efficient heat exchange device, are widely used in the thermal management of energy storage systems. Liquid cooling units absorb or release heat through circulating liquid to achieve the purpose of cooling or heating. The liquid cooling unit and the energy storage system are usually connected by pipes to achieve heat transfer. In order to improve the thermal management effect, it is usually necessary to install a temperature sensor on the pipeline. The temperature sensor detects the temperature of the liquid in the pipeline in real time and provides feedback to the control system.

[0074] Normally, the temperature of the liquid in the liquid cooling unit is increased or decreased to meet the temperature of the liquid required by the energy storage system. If there is residual liquid in the pipeline between the liquid cooling unit and the energy storage system or in the water cooling plate of the energy storage system, the temperature detection is inaccurate. The solution of increasing or decreasing the temperature of the liquid in the liquid cooling unit cannot enable the energy storage system to obtain the liquid at the ideal temperature value for thermal management.

[0075] In order to improve the accuracy of temperature detection and how to quickly calibrate the temperature of the pipeline in the liquid temperature detection device, the present application provides a liquid temperature detection device, including: a liquid inlet pipe, one end of the liquid inlet pipe is connected to the liquid outlet of the liquid cooling unit, and the other end is connected to the liquid inlet of the battery device, a liquid outlet pipe, one end of the liquid outlet pipe is connected to the liquid inlet of the liquid cooling unit, and the other end is connected to the liquid outlet of the battery device, a connecting pipe, which is used to connect the liquid outlet pipe and the liquid inlet pipe, a temperature sensing connecting pipe, which is arranged on the pipelines of the liquid inlet pipe, the liquid outlet pipe and the connecting pipe, and is used to obtain the temperature value of the pipeline; an on-off device, which is used to control the on-off of at least one of the liquid outlet pipe, the liquid inlet pipe and the connecting pipe according to the temperature value. In the technical solution of the embodiment of the present application, the on-off device is used to control the on-off of the liquid outlet pipe, the liquid inlet pipe and the connecting pipe, and the temperature of the liquid between each pipeline is quickly adjusted so that the temperature of the liquid in the pipeline is kept consistent. In addition, the on-off device is used to control and adjust the temperature of the pipeline, which can improve the accuracy and reliability of the liquid temperature detection in the pipeline.

[0076] Figure 1 FIG. 1 is a schematic diagram showing a partial structure of a battery device 10 provided in an embodiment of the present application. Figure 1 As shown, the battery device 10 of the embodiment of the present application may include a plurality of battery cells 12 to meet different power requirements. The shape of the battery cell 12 of the embodiment of the present application may be set according to the actual application. For example, the battery cell 12 may be as follows: Figure 1 The cylindrical shape shown, or it can also be different from Figure 1 The rectangular parallelepiped or other shapes shown are not limited to the embodiments of the present application.

[0077] It should be understood that Figure 1As shown, the battery device 10 of the embodiment of the present application may further include a box body 11, which may be used to accommodate a plurality of battery cells 12. The interior of the box body 11 of the embodiment of the present application is a hollow structure, and a plurality of battery cells 12 are accommodated in the box body 11. The box body 11 may include two parts, which are respectively referred to as a first box body part 111 and a second box body part 112, and the first box body part 111 and the second box body part 112 are buckled together. The shapes of the first box body part 111 and the second box body part 112 may be determined according to the shapes of the components accommodated inside. For example, they may be determined according to the shape of the combination of the plurality of battery cells 12 accommodated inside. At least one of the first box body part 111 and the second box body part 112 has an opening. For example, as Figure 1 As shown, the first box body 111 and the second box body 112 can both be hollow cuboids and each have an open face, the opening of the first box body 111 and the opening of the second box body 112 are arranged opposite to each other, and the first box body 111 and the second box body 112 are buckled together to form a box body 11 with a closed chamber, which can be used to accommodate multiple battery cells 12. Multiple battery cells 12 are connected in parallel, in series, or in mixed combination and placed in the box body 11 formed by the first box body 111 and the second box body 112 buckled together.

[0078] For example, unlike Figure 1 As shown, only one of the first box body 111 and the second box body 112 may be a hollow cuboid with an opening, while the other is in a plate shape to cover the opening. Taking the second box body 112 as a hollow cuboid with an opening and the first box body 111 as a plate, the first box body 111 covers the opening of the second box body 112 to form a box body 11 with a closed chamber, which can be used to accommodate multiple battery cells 12.

[0079] Figure 2 A schematic structural diagram of a liquid temperature detection device 20 provided in an embodiment of the present application is shown.

[0080] According to some embodiments of the present application, referring to Figure 2 The present application provides a liquid temperature detection device 20, including: a liquid inlet pipe 21, one end of the liquid inlet pipe 21 is connected to the liquid outlet of the liquid cooling unit 30, and the other end is connected to the liquid inlet of the battery device 10, a liquid outlet pipe 22, one end of the liquid outlet pipe 22 is connected to the liquid inlet of the liquid cooling unit 30, and the other end is connected to the liquid outlet of the battery device 10, a connecting pipe 23, used to connect the liquid outlet pipe 22 and the liquid inlet pipe 21, a temperature sensing connecting pipe 25, which is arranged on the pipelines of the liquid inlet pipe 21, the liquid outlet pipe 22 and the connecting pipe 23, and is used to obtain the temperature value of the pipeline; an on-off device 24, which is used to control the on-off of at least one of the liquid outlet pipe 22, the liquid inlet pipe 21 and the connecting pipe 23 according to the temperature value.

[0081] like Figure 2 As shown in the figure, the X direction is the length direction of the liquid outlet pipe 22 and the liquid inlet pipe 21, the Y direction is the width direction of the liquid outlet pipe 22 and the liquid inlet pipe 21, and the Z direction is the thickness direction of the liquid outlet pipe 22 and the liquid inlet pipe 21.

[0082] One end of the liquid inlet pipe 21 is connected to the liquid outlet of the liquid cooling unit 30, and the other end is connected to the liquid inlet of the water cooling plate of the battery device 10, so that the liquid in the liquid cooling unit 30 flows into the water cooling plate for thermal management, wherein the thermal management is cooling or heating, etc. One end of the liquid outlet pipe 22 is connected to the liquid inlet of the liquid cooling unit 30, and the other end is connected to the liquid outlet of the water cooling plate of the battery device 10, so that the liquid flowing through the water cooling plate flows into the liquid cooling unit 30 again through the liquid outlet pipe 22.

[0083] The connecting pipe 23 is used to connect the liquid outlet pipe 22 and the liquid inlet pipe 21. It should be understood that the number of the connecting pipes 23 is not limited in the embodiment of the present application, and can be one or two. In addition, the present application does not limit the specific location of the connecting pipe 23. For example, it can be set near the liquid cooling unit 30 to connect the liquid outlet pipe 22 and the liquid inlet pipe 21. For another example, it can also be set near the battery device 10 to connect the liquid outlet pipe 22 and the liquid inlet pipe 21. It should be understood that the liquid outlet pipe 22, the liquid inlet pipe 21 and the connecting pipe 23 can be referred to as pipes.

[0084] The on-off device 24 can be a switch, a ball valve or other valve body, etc., which can be used to control the on-off of the pipeline, and the embodiment of the present application does not impose any limitation on this. The on-off device 24 can be set at any position of the pipeline, and can be used to control the on-off of the pipeline. The number of on-off devices 24 is not limited in the embodiment of the present application. For example, the on-off device 24 can be set on the liquid outlet pipe 22, the liquid inlet pipe 21 and the connecting pipe 23 respectively, or the on-off of the liquid outlet pipe 22, the liquid inlet pipe 21 and the connecting pipe 23 can be controlled by a three-way valve.

[0085] The on-off of the liquid outlet pipe 22, the liquid inlet pipe 21 and the connecting pipe 23 is controlled by the on-off device 24 to adjust the temperature of the liquid between the various pipes. The connecting pipe 23 is connected with the liquid outlet pipe 22 and the liquid inlet pipe 21 to allow the liquid to quickly reflux, thereby keeping the temperature of the liquid in the pipe consistent. More specifically, the liquid inlet pipe 21 is longer and the temperature of the liquid may change during the transmission process, or the temperature of the liquid between the input port and the output port of the battery device 10 may change. Through the control of the on-off device 24, the liquid can quickly reflux through the connecting pipe 23 to keep the temperature of the liquid in the pipe consistent. In addition, the temperature of the pipe can be controlled and adjusted by the on-off device 24 to improve the accuracy and reliability of the liquid temperature detection in the pipe.

[0086] Figure 3FIG. 2 shows a structural schematic diagram of another liquid temperature detection device 20 provided in an embodiment of the present application. Figure 4 A partial structural schematic diagram of a liquid temperature detection device 20 provided in an embodiment of the present application is shown.

[0087] According to some embodiments of the present application, optionally, reference may be made to Figure 3 and Figure 4 The on-off device 24 includes a first on-off device 241, which is arranged on the pipeline of the connecting pipe 23, a second on-off device 242, which is arranged on the pipeline of the liquid outlet pipe 22 close to the battery device 10, and a third on-off device 243, which is arranged on the pipeline of the liquid inlet pipe 21 close to the battery device 10.

[0088] The first on-off device 241 is arranged on the connecting pipe 23, and is used to control the on-off of the connecting pipe 23. The second on-off device 242 and the third on-off device 243 are respectively arranged on the pipes of the liquid outlet pipe 22 and the liquid inlet pipe 21 close to the battery device 10, and are used to control the on-off of the liquid outlet pipe 22 and the liquid inlet pipe 21. For example, by controlling the conduction of the first on-off device 241, the disconnection of the second on-off device 242 and the third on-off device 243, the liquid quickly flows back through the connecting pipe, so that the temperature of the liquid in the pipe remains consistent. For another example, during the normal thermal management process of the battery device 10, the first on-off device 241 can be controlled to be disconnected, and the conduction of the second on-off device 242 and the third on-off device 243 can be realized.

[0089] The on-off of the liquid outlet pipe 22, the liquid inlet pipe 21 and the connecting pipe 23 are controlled by three on-off devices 24, and the temperature of the liquid between the pipes is quickly adjusted, so that the temperature of the liquid in the pipes of the liquid outlet pipe 22 and the liquid inlet pipe 21 remains consistent. In addition, the temperature of the pipes is controlled and adjusted by the three on-off devices 24, so that the accuracy and reliability of the liquid temperature detection in the pipes of the liquid outlet pipe 22 and the liquid inlet pipe 21 can be improved.

[0090] Figure 5 A schematic structural diagram of a temperature sensing connecting pipe 25 provided in an embodiment of the present application is shown.

[0091] According to some embodiments of the present application, optionally, reference may be made to Figure 5 The temperature sensing connecting tube 25 includes: a straight tube 255, a first matching part 256 and a second matching part 257 connected to the pipeline, which are respectively arranged at both ends of the straight tube 255, and the diameters of the first matching part 256 and the second matching part 257 along the axial direction of the straight tube gradually increase. The temperature sensor is arranged on the inner wall of the straight tube 255 to detect the temperature of the liquid flowing through the straight tube 255.

[0092] like Figure 5As shown, the first matching portion 256 and the second matching portion 257 are trumpet-shaped, expanding in all directions, and are arranged at both ends of the straight tube 255 for connecting with pipes of multiple diameters and types, wherein the pipe diameter refers to the diameter of a matching portion 256 and a second matching portion 257 .

[0093] Optionally, the temperature sensor may be annular, that is, one side that fits against the inner wall of the straight tube 255 is annular, so that it can better fit against the inner wall of the straight tube 255 and more accurately detect the temperature of the liquid in the straight tube 255.

[0094] Optionally, an information acquisition unit may be provided on the outer wall of the straight tube 255. After the annular temperature sensor detects the temperature of the liquid, the temperature information is transmitted to the information acquisition unit, and the information acquisition unit transmits the temperature information to the terminal for data processing such as temperature comparison.

[0095] By providing the first matching part 256 and the second matching part 257 at both ends of the straight tube 255, a quick plug connection can be made with soft and hard pipes of various diameters of the liquid temperature detection device 20, thereby improving the flexibility of the liquid temperature detection process and replacing the annular temperature sensor when it fails. In addition, the annular temperature sensor can better fit the inner wall of the straight tube 255 to more accurately detect the temperature of the liquid flowing through the straight tube 255.

[0096] According to some embodiments of the present application, optionally, the liquid temperature detection device 20 includes a temperature sensing connecting tube 25 arranged on the pipeline, and the temperature sensing connecting tube 25 includes a first temperature sensing connecting tube 251, which is arranged on the pipeline of the liquid inlet pipe 21 close to the battery device 10, and is used to obtain a first temperature value, and a second temperature sensing connecting tube 252, which is arranged on the pipeline of the liquid inlet pipe 21 close to the liquid cooling unit 30, and is used to obtain a second temperature value.

[0097] The temperature value includes a first temperature value and a second temperature value.

[0098] Optionally, the temperature sensing connection pipe 25 includes: a first temperature sensing connection pipe 251, which is arranged on the pipe of the liquid inlet pipe 21 close to the battery device 10, and is used to obtain a first temperature value; a second temperature sensing connection pipe 252, which is arranged on the pipe of the liquid inlet pipe 21 close to the liquid cooling unit 30, and is used to obtain a second temperature value; a third temperature sensing connection pipe 253, which is arranged on the pipe of the liquid outlet pipe 22 close to the battery device 10, and is used to obtain a third temperature value. The temperature value also includes a third temperature value.

[0099] By arranging a plurality of temperature-sensing connecting tubes 25 near the liquid outlet pipe 22 and the liquid inlet pipe 21 near the battery device 10 and the liquid cooling unit 30, quick-plug connections can be made with soft and hard pipes of various diameters of the liquid temperature detection device 20, thereby improving the flexibility of the liquid temperature detection process. In addition, by detecting the temperature of the pipeline through a plurality of temperature-sensing connecting tubes 25, the temperature of the liquid in the pipeline can be detected more accurately, thereby improving the accuracy and reliability of the liquid temperature detection in the pipeline.

[0100] Optionally, the temperature sensing connecting tube 25 includes a first temperature sensing connecting tube 251 and a second temperature sensing connecting tube 252. The first temperature sensing connecting tube 251 is arranged on the pipe of the liquid inlet pipe 21 close to the battery device 10, and is used to obtain a first temperature value. The second temperature sensing connecting tube 252 is arranged on the pipe of the liquid inlet pipe 21 close to the liquid cooling unit 30, and is used to obtain a second temperature value. The temperature sensing connecting tube 25 can also be arranged near the liquid outlet pipe 22 and the liquid inlet pipe 21 close to the battery device 10, so that it can be quickly connected with soft and hard pipes of various diameters of the liquid temperature detection device, thereby improving the flexibility of the liquid temperature detection process. In addition, by detecting the temperature between the water outlet and water inlet of the water cooling plate of the battery device 10 in the pipeline through the temperature sensing connecting tube 25, the temperature of the liquid in the pipeline can be detected more accurately, thereby improving the accuracy and reliability of the liquid temperature detection in the pipeline.

[0101] According to some embodiments of the present application, optionally, when the first temperature value and the second temperature value are different, the first on-off device 241 is used to control the conduction of the connecting pipe 23, the second on-off device 242 is used to control the disconnection of the liquid outlet pipe 22, and the third on-off device 243 is used to control the disconnection of the liquid inlet pipe 21; or, when the first temperature value, the second temperature value, the third temperature value and the fourth temperature value are the same, the first on-off device 241 is used to control the disconnection of the connecting pipe 23, the second on-off device 242 is used to control the conduction of the liquid outlet pipe 22, and the third on-off device 243 is used to control the conduction of the liquid inlet pipe 21.

[0102] When the first temperature value and the second temperature value are different, that is, when there is liquid remaining in the water cooling plate in the battery device 10, the connecting pipe 23 is controlled to be connected, the liquid outlet pipe 22 and the liquid inlet pipe 21 are disconnected, and the liquid refluxes so that the first temperature value and the second temperature value are the same.

[0103] Optionally, the liquid temperature detection device 20 includes three temperature sensing connecting pipes 25, which are respectively arranged on the pipe of the liquid inlet pipe 21 close to the battery device 10, the pipe of the liquid outlet pipe 22 close to the battery device 10, and the pipe of the liquid inlet pipe 21 close to the liquid cooling unit 30. When the first temperature value and the second temperature value are different, the second on-off device 242 and the third on-off device 243 are respectively used to control the disconnection of the liquid outlet pipe 22 and the liquid inlet pipe 21, and the first on-off device 241 is used to control the connection of the connecting pipe 23; when the first temperature value, the second temperature value and the third temperature value are the same, the second on-off device 242 and the third on-off device 243 are used to control the connection of the liquid outlet pipe 22 and the liquid inlet pipe 21, and the first on-off device 241 is used to control the disconnection of the connecting pipe 23. Rapid liquid reflux can also be performed to keep the temperature of the entire pipeline consistent.

[0104] Optionally, the liquid temperature detection device 20 includes four temperature-sensing connecting pipes 25, which are respectively arranged on the pipeline of the liquid inlet pipe 21 close to the battery device 10, the pipeline of the liquid inlet pipe 21 close to the liquid cooling unit 30, the pipeline of the liquid outlet pipe 22 close to the battery device 10, and the pipeline of the liquid outlet pipe 22 close to the liquid cooling unit 30, such as the first temperature-sensing connecting pipe 251, the second temperature-sensing connecting pipe 252, the third temperature-sensing connecting pipe 253 and the first temperature-sensing connecting pipe 254 in the figure. When the first temperature value and the second temperature value are different, the second on-off device 242 and the third on-off device 243 are respectively used to control the disconnection of the liquid outlet pipe 22 and the liquid inlet pipe 21, and the first on-off device 241 is used to control the connection of the connecting pipe 23; when the first temperature value, the second temperature value, the third temperature value and the fourth temperature value are the same, the second on-off device 242 and the third on-off device 243 are used to control the connection of the liquid outlet pipe 22 and the liquid inlet pipe 21, and the first on-off device 241 is used to control the disconnection of the connecting pipe 23. It is also possible to perform a rapid return of the liquid to keep the temperature consistent throughout the pipe.

[0105] It should be understood that in practice, it is impossible to keep the pipe temperatures completely consistent or exactly the same, therefore, the difference between the pipe temperatures can be kept within a range, for example, if the difference between the first temperature value and the second temperature value is between 1°C or 2°C, it can be considered that the corresponding pipe temperatures are the same. It should also be understood that the range can be set according to actual needs, and the present application does not impose any limitation on this.

[0106] It should be understood that a plurality of temperature sensing connecting pipes 25 may be provided in the pipeline for temperature detection, and when the temperature is different, the pipeline rapid reflux may be controlled by the on-off device 24 so that the pipeline temperature remains consistent.

[0107] According to some embodiments of the present application, optionally, the temperature sensing connecting tube 25 further includes: a third temperature sensing connecting tube 253 , which is disposed on a pipe of the liquid outlet pipe 22 close to the battery device 10 and is used to obtain a third temperature value.

[0108] According to some embodiments of the present application, optionally, when the first temperature value and the third temperature value are different, the first on-off device 241 is used to control the disconnection of the connecting pipe 23, the second on-off device 242 is used to control the conduction of the liquid outlet pipe 22, and the third on-off device 243 is used to control the conduction of the liquid inlet pipe 21.

[0109] When the first temperature value and the third temperature value are different, that is, there is liquid remaining in the liquid inlet pipe 21, the connecting pipe 23 is controlled to be connected, the liquid outlet pipe 22 and the liquid inlet pipe 21 are disconnected, and the liquid refluxes so that the first temperature value and the third temperature value are the same.

[0110] Optionally, the liquid temperature detection device 20 includes three temperature-sensing connecting pipes 25, which are respectively arranged on the pipeline of the liquid inlet pipe 21 close to the battery device 10, the pipeline of the liquid inlet pipe 21 close to the liquid cooling unit 30, and the pipeline of the liquid outlet pipe 22 close to the battery device 10. When the first temperature value and the third temperature value are different, the second on-off device 242 and the third on-off device 243 are respectively used to control the conduction of the liquid outlet pipe 22 and the liquid inlet pipe 21, and the first on-off device 241 is used to control the disconnection of the connecting pipe 23.

[0111] It should be understood that before the battery device 10 works normally, the first temperature value and the second temperature value may be measured first to detect whether there is any liquid residue in the pipe of the liquid inlet pipe 21, and then the first temperature value and the third temperature value may be measured to detect whether there is any liquid residue in the water cooling plate pipe in the battery device 10. Alternatively, after measuring the first temperature value and the second temperature value, the battery device 10 starts working for a period of time and then stops working, and then the first temperature value and the third temperature value are detected to determine whether there is any liquid residue in the water cooling plate pipe in the battery device 10.

[0112] According to some embodiments of the present application, optionally, the diameters of the first matching portion 256 and the second matching portion 257 range from 20 cm to 40 cm.

[0113] The diameter of the first matching portion 256 and the second matching portion 257 refers to their maximum diameter, which can be 20 cm, 25 cm, or 40 cm.

[0114] The diameter setting of the first matching portion 256 and the second matching portion 257 allows pipes of various diameters to be connected to the temperature sensing connecting pipe 25 to detect the temperature in the pipe.

[0115] According to some embodiments of the present application, optionally, the material of the straight tube 255 , the first matching portion 256 and the second matching portion 257 in the temperature sensing connecting tube 25 is polyvinyl chloride.

[0116] The material of the temperature sensing connecting pipe 25 is set to polyvinyl chloride, so that the temperature sensing connecting pipe 25 has good flexibility and can be easily bent, and can be matched and connected with different pipelines.

[0117] It should be understood that the materials of the straight tube 255 , the first matching portion 256 and the second matching portion 257 in the temperature sensing connecting tube 25 may also be other softer materials to facilitate plug-in connection with the pipeline.

[0118] Figure 6 A schematic structural diagram of a switching device 24 provided in an embodiment of the present application is shown.

[0119] According to some embodiments of the present application, optionally, reference may be made to Figure 6 The on-off device 24 includes: a hollow tube 244 for liquid to flow through the pipeline, a closure 246 for limiting the flow of liquid through the pipeline, and a driver 245, which is arranged between the hollow tube 244 and the closure 246 and rotates around the axis of the driver 245 to connect the hollow tube 244 or the closure 246 to the pipeline.

[0120] The driver 245 is used as an axis and rotates around the axis to connect the hollow tube 244 and the sealing member 246 to the pipeline respectively to control the on-off of the liquid. During the conversion process of the hollow tube 244 and the sealing member 246, the liquid may drip. In order to reduce the occurrence of dripping, a receiving part is provided at the lowest end of the air converter, and the receiving part can be connected to the pipeline to receive the liquid dripping from the pipeline during the driving process.

[0121] Optionally, the accommodating portion may also be a sphere for accommodating the on-off device 24 and connecting with the pipeline to reduce the problem of dripping during the conversion process.

[0122] It should be understood that the shape of the accommodating portion may also be circular, and the present application does not specifically limit the shape of the accommodating portion.

[0123] Optionally, the shape of the closure 246 can be the same as that of the hollow tube 244, and a baffle can be set inside to block the passage of liquid. The closure 246 can also be other shapes as long as it can block the passage of liquid in the pipeline. This application does not impose any limitations on this.

[0124] The driver 245 in the conversion control module drives the switching of the hollow tube 244 and the closure 246, thereby controlling the on-off of the pipeline and adjusting the temperature of the liquid between the pipelines so that the temperature of the liquid in the pipeline remains consistent. In addition, by controlling and adjusting the temperature of the pipeline through the on-off device 24, the accuracy and reliability of the liquid temperature detection in the pipeline can be improved.

[0125] According to some embodiments of the present application, the present application also provides an energy storage device, including a liquid cooling unit, a battery device and a liquid temperature detection device as described in any of the above schemes, the liquid temperature detection device is used to connect the liquid cooling unit and the battery device, and adjust the temperature between the liquid cooling unit and the battery device.

[0126] According to some embodiments of the present application, the present application also provides an energy storage system, including a power conversion device and the energy storage device described in any of the above schemes, and the power conversion device is used to electrically connect the power generation device and the energy storage device.

[0127] According to some embodiments of the present application, see Figures 2 to 6 The present application provides a liquid temperature detection device 20, including: a liquid inlet pipe 21, one end of the liquid inlet pipe 21 is connected to the liquid outlet of the liquid cooling unit 30, and the other end is connected to the liquid inlet of the battery device 10, a liquid outlet pipe 22, one end of the liquid outlet pipe 22 is connected to the liquid inlet of the liquid cooling unit 30, and the other end is connected to the liquid outlet of the battery device 10, a connecting pipe 23, used to connect the liquid outlet pipe 22 and the liquid inlet pipe 21, a temperature sensing connecting pipe 25, which is arranged on the pipelines of the liquid inlet pipe 21, the liquid outlet pipe 22 and the connecting pipe 23, and is used to obtain the temperature value of the pipeline; an on-off device 24, which is used to control the on-off of at least one of the liquid outlet pipe 22, the liquid inlet pipe 21 and the connecting pipe 23 according to the temperature value. The on-off device 24 is used to control the on-off of the liquid outlet pipe 22, the liquid inlet pipe 21 and the connecting pipe 23, so as to adjust the temperature of the liquid between the various pipes. The connecting pipe 23 quickly refluxes the liquid so that the temperature of the liquid in the pipe remains consistent. In addition, the on-off device 24 controls and adjusts the temperature of the pipe, so as to improve the accuracy and reliability of the liquid temperature detection in the pipe.

[0128] Figure 7 A schematic flow chart of a liquid temperature detection method 700 provided in an embodiment of the present application is shown.

[0129] According to some embodiments of the present application, Figure 7 As shown, the liquid temperature detection method 700 includes the following contents: S710: Acquire a temperature value, where the temperature value is used to represent the temperature of any one or more of the liquid outlet pipe, the liquid inlet pipe, or the connecting pipe.

[0130] S720: Control the on / off of one or more of the liquid outlet pipe, the liquid inlet pipe and the connecting pipe according to the temperature value.

[0131] Among them, the liquid temperature detection method 700 is applied to a liquid temperature detection device, the liquid temperature detection device includes a liquid outlet pipe, a liquid inlet pipe and a connecting pipe, one end of the liquid inlet pipe is connected to the liquid outlet of the liquid cooling unit, and the other end is connected to the liquid inlet of the battery device, one end of the liquid outlet pipe is connected to the liquid inlet of the liquid cooling unit, and the other end is connected to the liquid outlet of the battery device, and the connecting pipe connects the liquid outlet pipe and the liquid inlet pipe. Optionally, the liquid temperature detection device can be a liquid temperature detection device 20.

[0132] Specifically, the execution subject of the embodiment of the method may be a controller, and the controller may be the on-off device 24 in the above-mentioned device embodiment. The following description will be made by taking the on-off device as an example.

[0133] The on-off device is used to control the on-off of the liquid outlet pipe, the liquid inlet pipe and the connecting pipe, and the temperature of the liquid between each pipe is adjusted to keep the temperature of the liquid in the pipe consistent. More specifically, the liquid inlet pipe is relatively long, and the temperature of the liquid may change during the transmission process, or the temperature of the liquid between the input port and the output port of the battery device may change. Through the control of the on-off device, the temperature of the liquid in the pipe may be kept consistent. In addition, the accuracy and reliability of the liquid temperature detection in the pipe may be improved by controlling and adjusting the temperature of the pipe through the on-off device.

[0134] It should be understood that the temperature value may be measured by a temperature sensor in the pipeline and sent to the on-off device, or may be obtained by other means, and the present application does not impose any limitation on this.

[0135] It should also be understood that the above S710 and S720 are not in any particular order. For example, the on-off device can control the on-off of the liquid outlet pipe, the liquid inlet pipe and the connecting pipe according to the temperature value obtained from previous experience, or it can first obtain the temperature value and then control the on-off of the liquid outlet pipe, the liquid inlet pipe and the connecting pipe according to the temperature value. The present application does not impose any limitation on this.

[0136] According to some embodiments of the present application, optionally, the temperature value includes a first temperature value, a second temperature value and a third temperature value, the first temperature value is used to characterize the temperature of the liquid inlet pipe close to the battery device, the second temperature value is used to characterize the temperature of the liquid inlet pipe close to the liquid cooling unit, and the third temperature value is used to characterize the temperature of the liquid outlet pipe close to the battery device, one end of the liquid inlet pipe is connected to the liquid outlet of the liquid cooling unit, and the other end is connected to the liquid inlet of the battery device, one end of the liquid outlet pipe is connected to the liquid inlet of the liquid cooling unit, and the other end is connected to the liquid outlet of the battery device.

[0137] Figure 8 A schematic flow chart of another liquid temperature detection method 2 800 provided in an embodiment of the present application is shown.

[0138] According to some embodiments of the present application, Figure 8 As shown, the second liquid temperature detection method 800 includes the following contents: S810: Responding to a test preparation instruction.

[0139] S820: According to the test preparation instruction, obtain the first temperature value and the second temperature value, and / or obtain the first temperature value and the third temperature value.

[0140] S830: When the first temperature value and the second temperature value are the same, and / or when the first temperature value and the third temperature value are the same, confirm that the test preparation is completed.

[0141] Specifically, the execution subject of the embodiment of the method may be a controller, and the controller may be the on-off device 24 in the above-mentioned device embodiment. The following description will be made by taking the on-off device as an example.

[0142] In the above S820, during the test preparation stage, the on-off device can obtain the temperature value at both ends of the liquid inlet pipe or the battery device, and determine whether there is liquid accumulation at both ends of the liquid inlet pipe or the battery device according to the temperature value, so as to remove the accumulated liquid, which is more conducive to subsequent testing.

[0143] It should be understood that part of the content in the method embodiment is the same as the device embodiment, and reference may be made to the device embodiment, and the method embodiment in this application will not be repeated here.

[0144] Optionally, after the on-off device responds to the test preparation instruction, a fourth temperature value can also be obtained, and the fourth temperature value is used to characterize the temperature of the liquid outlet pipe close to the liquid cooling unit. The on-off device can obtain the first temperature value and the second temperature value according to the test preparation instruction, and / or obtain the first temperature value and the third temperature value, and / or the third temperature value and the fourth temperature value, and confirm that the test preparation is completed when the first temperature value and the second temperature value are the same, and / or when the first temperature value and the third temperature value are the same, and / or when the third temperature value and the fourth temperature value are the same, and / or when the first temperature value, the second temperature value, the third temperature value and the fourth temperature value are the same.

[0145] Optionally, during the test preparation stage, the effusion can be removed by reflux through the connecting pipe, the liquid inlet pipe and the liquid outlet pipe, or only the connecting pipe can be connected to remove the effusion, or only the liquid inlet pipe and the liquid outlet pipe can be connected to remove the effusion. It should be understood that removing the effusion through only the connecting pipe can efficiently and quickly remove the effusion.

[0146] In the embodiment of the present application, after obtaining the test preparation instruction, the first temperature value and the second temperature value are obtained, in order to detect the temperature at both ends of the liquid inlet pipe to remove the accumulated liquid. After the accumulated liquid is finally removed, when the first temperature and the second temperature are the same, the test preparation is confirmed to be completed. Similarly, the first temperature value and the third temperature value are obtained, in order to detect the temperature at both ends of the battery device to remove the accumulated liquid in the battery device, so that the liquid temperature detection process is more accurate.

[0147] Fig. 9 A schematic flow chart of another liquid temperature detection method 3 900 provided in an embodiment of the present application is shown.

[0148] According to some embodiments of the present application, Fig. 9 As shown, the liquid temperature detection method 3 900 includes the following contents: S910: Respond to a test instruction.

[0149] S920: Acquire a first temperature value and a second temperature value according to the test instruction.

[0150] Specifically, the execution subject of the embodiment of the method may be a controller, and the controller may be the on-off device 24 in the above-mentioned device embodiment. The following description will be made by taking the on-off device as an example.

[0151] During the formal test phase, since the liquid inlet pipe is long, the temperatures at both ends may be inconsistent during the flow of liquid. Therefore, after the on-off device responds to the test instruction, the temperature values ​​at both ends of the liquid inlet pipe can be obtained according to the test instruction.

[0152] According to some embodiments of the present application, optionally, one or more of the liquid outlet pipe, the liquid inlet pipe and the connecting pipe are controlled to be on and off according to the temperature value, including: when the first temperature value and the second temperature value are different, the liquid outlet pipe and the liquid inlet pipe are controlled to be disconnected, and the connecting pipe is controlled to be connected; or, when the first temperature value and the second temperature value are the same, the liquid outlet pipe and the liquid inlet pipe are controlled to be connected, and the connecting pipe is controlled to be configured to be disconnected.

[0153] Optionally, during the test, the on-off device can also obtain a third temperature value and a fourth temperature value. When the third temperature value and the fourth temperature value are different, the on-off device controls the connecting pipe to be turned on, disconnects the liquid inlet pipe and the liquid outlet pipe, and performs reflux, so that the temperature at both ends of the liquid outlet pipe is consistent.

[0154] In an embodiment of the present application, during the test, if the temperatures at both ends of the liquid inlet pipe are different due to problems such as being too long, the liquid outlet pipe and the liquid inlet pipe can be disconnected, and the connecting pipe can be controlled to be open, so that the liquid can quickly reflux through the connecting pipe, thereby making the temperatures at both ends of the liquid inlet pipe consistent.

[0155] Fig.10 A schematic flow chart of another liquid temperature detection method 1000 provided in an embodiment of the present application is shown.

[0156] According to some embodiments of the present application, Fig.10 As shown, the liquid temperature detection method 4 1000 includes the following contents: S1010: Responding to a test suspension instruction.

[0157] S1020: Acquire the first temperature value and the third temperature value according to the test pause instruction.

[0158] Specifically, the execution subject of the embodiment of the method may be a controller, and the controller may be the on-off device 24 in the above-mentioned device embodiment. The following description will be made by taking the on-off device as an example.

[0159] In the embodiment of the present application, during the test pause process, it is necessary to detect whether the temperature values ​​on both sides of the battery device are the same, that is, during the pause process, the residual liquid in the water cooling plate in the battery device may be discharged from the liquid outlet pipe, making the temperature on both sides of the battery device inconsistent. Therefore, during the test pause process, the temperature on both sides of the battery device is obtained to make the test process more accurate.

[0160] According to some embodiments of the present application, optionally, one or more of the liquid outlet pipe, the liquid inlet pipe and the connecting pipe are controlled to be turned on and off according to the temperature value, including: when the first temperature value and the third temperature value are different, the liquid outlet pipe and the liquid inlet pipe are controlled to be turned on, and the connecting pipe is controlled to be turned off.

[0161] It should be understood that in the above method embodiments, the on-off device can obtain a fourth temperature value, and can control the on-off of the liquid inlet pipe, the liquid outlet pipe and the connecting pipe through any one or more of the first temperature value, the second temperature value, the third temperature value and the fourth temperature value.

[0162] Optionally, during the test pause, the on-off device can also obtain the third temperature value and the fourth temperature value. When the third temperature value and the fourth temperature value are different, the on-off device controls the connecting pipe to be turned on, disconnects the liquid inlet pipe and the liquid outlet pipe, and performs reflux, so that the temperature at both ends of the liquid outlet pipe is consistent.

[0163] According to some embodiments of the present application, the present application also provides a chip, including: a processor, used to call and run a computer program from a memory, so that a device equipped with the chip executes the liquid temperature detection method as described in any of the above schemes.

[0164] According to some embodiments of the present application, the present application also provides a computer-readable storage medium, including: a computer program is stored on the computer-readable storage medium, and when the computer program runs on a computer, the computer executes the liquid temperature detection method described in any of the above schemes.

[0165] According to some embodiments of the present application, the present application also provides a computer program product, which includes a computer program product for executing the liquid temperature detection method as described in any of the above schemes.

[0166] 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 liquid temperature detection device, characterized in that: include: A liquid inlet pipe, one end of which is connected to the liquid outlet of the liquid cooling unit, and the other end of which is connected to the liquid inlet of the battery device; a liquid outlet pipe, one end of which is connected to the liquid inlet of the liquid cooling unit, and the other end of which is connected to the liquid outlet of the battery device; A connecting pipe, used for connecting the liquid outlet pipe with the liquid inlet pipe; A temperature sensing connecting pipe is arranged on the pipes of the liquid inlet pipe, the liquid outlet pipe and the connecting pipe, and is used to obtain the temperature value of the pipe; The on-off device is used to control the on-off of at least one of the liquid outlet pipe, the liquid inlet pipe and the connecting pipe according to the temperature value.

2. The liquid temperature detection device according to claim 1, characterized in that: The on-off device comprises: A first on-off device is arranged on the pipeline of the connecting pipe; A second on-off device is arranged on a pipe of the liquid outlet pipe close to the battery device; The third on-off device is arranged on a pipe of the liquid inlet pipe close to the battery device.

3. The liquid temperature detection device according to claim 2, characterized in that: The temperature sensing connecting pipe comprises: A first temperature sensing connecting pipe is provided on the pipe of the liquid inlet pipe close to the battery device and is used to obtain a first temperature value; The second temperature sensing connecting pipe is arranged on the pipeline of the liquid inlet pipe close to the liquid cooling unit, and is used to obtain a second temperature value.

4. The liquid temperature detection device according to claim 3, characterized in that: When the first temperature value and the second temperature value are different, the first on-off device is used to control the connection of the connecting pipe, the second on-off device is used to control the disconnection of the liquid outlet pipe, and the third on-off device is used to control the disconnection of the liquid inlet pipe; or, When the first temperature value and the second temperature value are the same, the first on-off device is used to control the disconnection of the connecting pipe, the second on-off device is used to control the conduction of the liquid outlet pipe, and the third on-off device is used to control the conduction of the liquid inlet pipe.

5. The liquid temperature detection device according to claim 3, characterized in that: The temperature sensing connecting pipe also includes: The third temperature sensing connecting pipe is arranged on the pipeline of the liquid outlet pipe close to the battery device, and is used to obtain a third temperature value.

6. The liquid temperature detection device according to claim 5, characterized in that: When the first temperature value and the third temperature value are different, the first on-off device is used to control the disconnection of the connecting pipe, the second on-off device is used to control the conduction of the liquid outlet pipe, and the third on-off device is used to control the conduction of the liquid inlet pipe.

7. The liquid temperature detection device according to claim 3, characterized in that: The temperature sensing connecting pipe comprises: Straight pipe, used for the circulation of liquid; A first matching portion and a second matching portion connected to the pipeline are respectively arranged at two ends of the straight pipe, and in the axial direction of the straight pipe, the diameters of the first matching portion and the second matching portion gradually increase; The temperature sensor is arranged on the inner wall of the straight tube and is used to detect the temperature of the liquid flowing through the straight tube.

8. The liquid temperature detection device according to claim 7, characterized in that: The straight pipe, the first matching part and the second matching part in the temperature sensing connecting pipe are made of polyvinyl chloride.

9. The liquid temperature detection device according to any one of claims 1 to 8, characterized in that: The on-off device comprises: A hollow tube used for liquids to flow through the pipe; a closure member for restricting the flow of the liquid through the conduit; The driver is arranged between the hollow tube and the sealing member, and rotates around the axis of the driver to connect the hollow tube or the sealing member with the pipeline.

10. A liquid temperature detection method, characterized in that: include: Acquire a temperature value, where the temperature value is used to characterize the temperature of any one or more of the liquid outlet pipe, the liquid inlet pipe, or the connecting pipe; According to the temperature value, one or more of the liquid outlet pipe, the liquid inlet pipe and the connecting pipe are controlled to be on or off.

11. The liquid temperature detection method according to claim 10, characterized in that: The temperature value includes a first temperature value, a second temperature value and a third temperature value, wherein the first temperature value is used to characterize the temperature of the liquid inlet pipe close to the battery device, the second temperature value is used to characterize the temperature of the liquid inlet pipe close to the liquid cooling unit, and the third temperature value is used to characterize the temperature of the liquid outlet pipe close to the battery device. One end of the liquid inlet pipe is connected to the liquid outlet of the liquid cooling unit, and the other end is connected to the liquid inlet of the battery device. One end of the liquid outlet pipe is connected to the liquid inlet of the liquid cooling unit, and the other end is connected to the liquid outlet of the battery device.

12. The liquid temperature detection method according to claim 11, characterized in that: The obtaining of the temperature value comprises: responding to test preparation instructions; According to the test preparation instruction, obtaining the first temperature value and the second temperature value, and / or obtaining the first temperature value and the third temperature value; When the first temperature value and the second temperature value are the same, and / or when the first temperature value and the third temperature value are the same, it is confirmed that the test preparation is completed.

13. The liquid temperature detection method according to claim 11 or 12, characterized in that: The obtaining of the temperature value comprises: responding to a test instruction; According to the test instruction, the first temperature value and the second temperature value are acquired.

14. The liquid temperature detection method according to claim 13, characterized in that: The step of controlling the on / off of one or more of the liquid outlet pipe, the liquid inlet pipe and the connecting pipe according to the temperature value comprises: When the first temperature value and the second temperature value are different, the liquid outlet pipe and the liquid inlet pipe are controlled to be disconnected, and the connecting pipe is controlled to be connected; or, When the first temperature value and the second temperature value are the same, the liquid outlet pipe and the liquid inlet pipe are controlled to be connected, and the connecting pipe is controlled to be disconnected.

15. The liquid temperature detection method according to claim 11 or 12, characterized in that: The obtaining of the temperature value comprises: responding to a test pause instruction; According to the test pause instruction, the first temperature value and the third temperature value are acquired.

16. The liquid temperature detection method according to claim 15, characterized in that: The step of controlling the on / off of one or more of the liquid outlet pipe, the liquid inlet pipe and the connecting pipe according to the temperature value comprises: When the first temperature value and the third temperature value are different, the liquid outlet pipe and the liquid inlet pipe are controlled to be connected, and the connecting pipe is controlled to be disconnected.

17. A chip, characterized in that: include: The processor is used to call and run a computer program from a memory so that a device equipped with the chip executes a liquid temperature detection method as described in any one of claims 10 to 16.

18. A computer-readable storage medium, characterized in that: include: The computer-readable storage medium stores a computer program, and when the computer program is executed on a computer, the computer is enabled to execute the liquid temperature detection method according to any one of claims 10 to 16.

19. A computer program product, characterized in that The computer program product comprises means for executing the liquid temperature detection method according to any one of claims 10 to 16.

20. An energy storage device, characterized in that: It comprises a liquid cooling unit, a battery device and a liquid temperature detection device as described in any one of claims 1 to 9, wherein the liquid temperature detection device is used to connect the liquid cooling unit and the battery device and adjust the temperature between the liquid cooling unit and the battery device.

21. An energy storage system, characterized in that: It comprises a power conversion device and an energy storage device as claimed in claim 20, wherein the power conversion device is used to electrically connect a power generation device and the energy storage device.

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