Cooling liquid filling control method and device, controller, liquid filling equipment, medium and program product

Abstract

The embodiment of the invention provides a cooling liquid filling control method and device, a controller, liquid filling equipment, a medium and a program product, and relates to the technical field of energy storage. The cooling liquid filling control method is applied to a controller and comprises the steps that detection parameters, sent by a signal converter, of a cooling liquid circulation loop are received; according to the detection parameters, the filling machine is controlled to inject the cooling liquid into the cooling liquid circulation loop, specifically, under the state that the water pump does not operate, filling treatment of the cooling liquid is conducted, and whether filling treatment is stopped or not is determined according to the pressure value in the cooling liquid circulation loop; the water pump is controlled to operate under the condition that filling is stopped, and when the operation duration of the water pump is larger than or equal to the operation duration threshold value, whether the pressure in the cooling liquid circulation loop is qualified or not is judged according to the pressure value, and control processing is conducted. According to the invention, the filling of the cooling liquid of the cooling liquid circulation loop can be accurately controlled, the accuracy of liquid filling control is improved, the effect of carrying out thermal management on the battery is improved, and the quality of the energy storage equipment is improved.

Description

Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to a coolant filling control method, device, controller, liquid filling equipment, storage medium and computer program product. Background Art

[0002] With the development of new energy technologies, energy storage equipment is being used more and more widely. When the energy storage equipment is in power supply and other working conditions, the battery in the energy storage equipment may generate heat. If the battery is in an overly high temperature state for a long time, it may affect the battery life and pose a safety hazard. Therefore, the battery needs to be cooled down; and when the energy storage equipment is running in a low temperature environment, it needs to be powered on after the battery is warmed up, so the battery needs to be heated up. A water cooling unit can be configured for the energy storage equipment to cool down and heat up the battery to provide thermal management for the battery. At present, when the water cooling unit is filled with coolant, the injection device injects the coolant into the water cooling unit at a constant pressure through the injection channel, and collects the pressure value in the injection channel through the pressure sensor. If the pressure value meets the preset pressure condition, the injection is stopped; however, this pressure value cannot truly reflect the actual coolant pressure in the water cooling unit, which can easily cause problems such as low coolant pressure in the water cooling unit after injection, affecting the thermal management effect of the water cooling unit, bringing safety hazards and reducing product quality. Summary of the invention

[0003] In view of the above problems, the present application provides a coolant filling control method, device, controller, filling equipment, storage medium and computer program product to improve the accuracy of filling control of the coolant circulation loop of a water-cooled unit.

[0004] According to a first aspect of the present disclosure, a coolant filling control method is provided, wherein a water cooling unit comprises a coolant circulation loop, and a filling device comprises a filling machine, a signal converter and a controller; the coolant filling control method is applied to the controller, comprising: receiving detection parameters of the coolant circulation loop sent by the signal converter, wherein the signal converter receives a communication message sent by the water cooling unit, and obtains the detection parameters based on the communication message; according to the detection parameters, controlling the filling machine to inject coolant into the coolant circulation loop.

[0005] In this embodiment, a communication message sent by the water cooling unit is received through a signal converter to obtain the detection parameters of the coolant circulation loop, and the filling machine can be controlled to perform coolant injection processing according to the detection parameters; during the coolant filling process, the real state information of the coolant circulation loop can be accurately determined according to the detection parameters of the coolant circulation loop, and the coolant filling of the coolant circulation loop can be accurately controlled, thereby improving the accuracy of the injection control of the coolant circulation loop, ensuring that the coolant pressure in the water cooling unit meets the requirements, improving the effect of the water cooling unit on thermal management of the battery, and improving the quality of the energy storage device.

[0006] In some embodiments, the detection parameter includes a pressure value within the coolant circulation loop, and controlling the filling machine to inject coolant into the coolant circulation loop based on the detection parameter includes: controlling the filling machine to fill the coolant circulation loop with coolant when a water pump in the coolant circulation loop is not running; and determining whether to stop the filling process based on the pressure value.

[0007] In this embodiment, when the water pump in the coolant circulation loop is not running, the filling machine is controlled to perform filling processing according to the static pressure value in the coolant circulation loop, so that the actual static pressure of the coolant circulation loop can be accurately determined, and the coolant filling of the coolant circulation loop can be precisely controlled based on the actual static pressure.

[0008] In some embodiments, determining whether to stop the filling process based on the pressure value includes: when it is determined that the pressure value satisfies a first pressure condition, judging whether the total amount of coolant filled in the filling process is greater than or equal to a qualified filling amount threshold; when the total amount of coolant filled is greater than or equal to the qualified filling amount threshold, determining to stop the filling process.

[0009] In this embodiment, when it is determined that the static pressure value in the coolant circulation loop meets the first pressure condition and the total amount of coolant filled during the filling process is greater than or equal to the qualified filling amount threshold, the filling process is stopped; based on the actual static pressure of the coolant circulation loop and the total amount of coolant filled, the coolant filling of the coolant circulation loop can be accurately controlled to ensure that the coolant pressure in the water cooling unit meets the requirements.

[0010] In some embodiments, the first pressure condition includes: the duration of the pressure value within the first pressure threshold range is greater than or equal to a first duration threshold.

[0011] In this embodiment, by setting the first pressure condition, the accuracy of the acquired static pressure value can be improved, thereby improving the precision of coolant filling control.

[0012] In some embodiments, controlling the filling machine to inject coolant into the coolant circulation loop according to the detection parameters includes: when it is determined to stop the filling process, sending a first instruction to the water cooling unit so that the water cooling unit controls the operation of the water pump according to the first instruction; when the operating time of the water pump is greater than or equal to the operating time threshold, judging whether the pressure in the coolant circulation loop is qualified according to the pressure value, and performing corresponding control processing based on the judgment result.

[0013] In this embodiment, the water pump operation is controlled when it is determined to stop the filling process. When the water pump in the coolant circulation loop is running, corresponding control processing is performed according to the dynamic pressure value in the coolant circulation loop. The actual dynamic pressure of the coolant circulation loop can be accurately determined, and the coolant filling of the coolant circulation loop can be accurately controlled based on the actual dynamic pressure.

[0014] In some embodiments, judging whether the pressure in the coolant circulation loop is qualified according to the pressure value and performing corresponding control processing based on the judgment result include: when it is determined that the pressure value does not meet the second pressure condition, determining that the pressure in the coolant circulation loop is unqualified; when it is determined that the pressure in the coolant circulation loop is unqualified, controlling the filling machine to perform coolant filling and adjustment processing on the coolant circulation loop until the pressure value meets the second pressure condition.

[0015] In this embodiment, when it is determined that the dynamic pressure value in the coolant circulation loop does not meet the second pressure condition, the filling machine is controlled to perform coolant filling adjustment processing until the dynamic pressure value meets the second pressure condition; the filling amount can be automatically adjusted when the filling is unqualified, and the coolant filling of the coolant circulation loop can be accurately controlled, and the coolant pressure in the water cooling unit can be accurately controlled.

[0016] In some embodiments, judging whether the pressure in the coolant circulation loop is qualified according to the pressure value and performing corresponding control processing based on the judgment result include: when it is determined that the pressure value satisfies a second pressure condition, determining that the pressure in the coolant circulation loop is qualified; when it is determined that the pressure in the coolant circulation loop is qualified, sending a second instruction to the water cooling unit, so that the water cooling unit controls the water pump to stop running and enter a standby state according to the second instruction.

[0017] In this embodiment, when it is determined that the dynamic pressure value in the coolant circulation loop meets the second pressure condition, the water pump is controlled to stop running and enter a standby state, which can ensure that the coolant pressure meets the requirements and improve the effect of the water cooling unit in cooling and heating the battery.

[0018] In some embodiments, controlling the filling machine to adjust the coolant filling of the coolant circulation loop includes: controlling the filling machine to inject coolant into the coolant circulation loop based on a first volume set value for a single injection of coolant, and / or controlling the filling machine to suck back the coolant in the coolant circulation loop based on a second volume set value for a single back suction of coolant.

[0019] In this embodiment, based on the capacity setting of a single injection or back-absorption, the filling machine is controlled to perform the injection or back-absorption of coolant, which can improve the accuracy of automatically adjusting the injection amount and can accurately control the coolant filling of the coolant circulation loop.

[0020] In some embodiments, the second pressure condition includes: the duration of the pressure value being within the second pressure threshold range is greater than a second duration threshold.

[0021] In this embodiment, by setting the second pressure condition, the accuracy of the acquired dynamic pressure value can be improved, thereby improving the precision of coolant filling control.

[0022] In some embodiments, controlling the filling machine to fill the coolant circulation loop with coolant includes: controlling the filling machine to fill coolant into the coolant circulation loop based on a first filling pressure and determining the injection amount of the filled coolant; when the coolant injection amount is greater than or equal to an injection amount threshold, controlling the filling machine to fill coolant into the coolant circulation loop based on a second filling pressure; wherein the first filling pressure is greater than the second filling pressure.

[0023] In this embodiment, the filling machine is controlled to fill coolant into the coolant circulation loop in sequence based on high filling pressure and low filling pressure, which can improve the efficiency of filling coolant into the coolant circulation loop and improve the control accuracy of coolant filling.

[0024] In some embodiments, before controlling the filling machine to perform the filling process, the filling machine is controlled to perform a vacuum process on the coolant circulation loop; when it is determined that the vacuuming qualified conditions are met, the filling machine is controlled to stop the vacuuming process.

[0025] In this embodiment, the efficiency of the filling process can be improved by controlling the filling machine to perform a vacuum process on the coolant circulation loop before performing the filling process.

[0026] In some embodiments, the vacuuming qualified condition includes: the vacuum degree in the coolant circulation loop is less than a vacuum degree threshold, and the duration of the vacuuming process is greater than or equal to a third duration threshold.

[0027] In this embodiment, the vacuuming process is performed based on the duration of the vacuuming process and the vacuum degree in the coolant circulation loop, thereby improving the accuracy of the vacuuming process.

[0028] According to a second aspect of the present disclosure, a coolant filling control device is provided, wherein the water cooling unit includes a coolant circulation loop, and the filling equipment includes a filling machine, a signal converter and a controller; the coolant filling control device is applied to the controller, comprising: an information acquisition module, for receiving detection parameters of the coolant circulation loop sent by the signal converter, wherein the signal converter receives a communication message sent by the water cooling unit, and acquires the detection parameters based on the communication message; and a filling control module, for controlling the filling machine to inject coolant into the coolant circulation loop according to the detection parameters.

[0029] In this embodiment, a communication message sent by the water cooling unit is received through a signal converter to obtain the detection parameters of the coolant circulation loop, and the filling machine can be controlled to perform coolant injection processing according to the detection parameters; during the coolant filling process, the real state information of the coolant circulation loop can be accurately determined according to the detection parameters of the coolant circulation loop, and the coolant filling of the coolant circulation loop can be accurately controlled, thereby improving the accuracy of the injection control of the coolant circulation loop, ensuring that the coolant pressure in the water cooling unit meets the requirements, improving the effect of the water cooling unit on thermal management of the battery, and improving the quality of the energy storage device.

[0030] According to a third aspect of the present disclosure, there is provided a controller, comprising: a memory; and a processor coupled to the memory, wherein the processor is configured to execute the method as described above based on instructions stored in the memory.

[0031] According to a fourth aspect of the present disclosure, there is provided a liquid injection device, comprising: a filling machine, a signal converter and the controller as described above.

[0032] According to a fifth aspect of the present disclosure, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions, and the instructions are executed by a processor as described above.

[0033] According to a sixth aspect of the present disclosure, a computer program product is provided, wherein the computer program product stores computer instructions, and the instructions are executed by a processor according to the method described above.

[0034] 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

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments of the present application. Obviously, the drawings described in the following are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without creative work.

[0036] Figure 1 It is a flowchart of some embodiments of the coolant filling control method disclosed in the present invention; Figure 2 Schematic diagrams of some embodiments of filling passages and communication between a liquid filling device and a water cooling unit; Figure 3 It is a schematic diagram of the structure of some embodiments of the water cooling unit; Figure 4 A schematic diagram of a process for performing initial liquid injection in some embodiments of the coolant filling control method disclosed herein; Figure 5 A schematic diagram of a flow chart of dynamic detection in some embodiments of the coolant filling control method disclosed in the present invention; Figure 6 A schematic diagram of a flow chart of performing filling adjustment in some embodiments of the coolant filling control method disclosed in the present invention; Figure 7 It is a module schematic diagram of some embodiments of the coolant filling control device disclosed in the present invention; Figure 8 is a schematic diagram of a liquid filling control module in some embodiments of the coolant filling control device disclosed herein; Fig. 9 Schematic diagrams of modules of other embodiments of the coolant filling control device disclosed in the present invention; Fig.10 Schematic diagrams of some embodiments of the controller disclosed herein. DETAILED DESCRIPTION

[0037] 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.

[0038] 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.

[0039] 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.

[0040] Reference to "embodiments" herein means that the specific features, structures, or characteristics described in conjunction with the embodiments may be included in at least some embodiments of the present application. The appearance of the phrase in various places 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.

[0041] 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.

[0042] 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).

[0043] 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.

[0044] 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.

[0045] The energy storage device may be a variety of devices for storing electrical energy, and the energy storage device includes a plurality of batteries, and the batteries may be lithium batteries, etc. The energy storage device is equipped with a water cooling unit, and the water cooling unit may be a variety of existing water cooling units, which cools down and heats up the battery to provide thermal management for the battery; the water cooling unit includes a coolant circulation loop, etc., and the coolant in the coolant circulation loop may be a variety of existing coolants. The liquid injection device includes a filling machine, a signal converter and a controller, and the filling machine may be a variety of existing filling machines. The coolant filling control method disclosed in the present invention is applied to the controller of the liquid injection device.

[0046] Figure 1 Schematic diagram of some embodiments of the coolant filling control method disclosed in the present invention, such as Figure 1 As shown: Step S101, receiving detection parameters of a coolant circulation loop sent by a signal converter, wherein the signal converter receives a communication message sent by a water cooling unit, and obtains the detection parameters based on the communication message.

[0047] The signal converter can be implemented in a variety of ways, such as a single-chip microcomputer and an integrated circuit. A detection unit such as a sensor can be set in the coolant circulation loop of the water-cooling unit to collect parameters such as pressure; the detection parameters of the coolant circulation loop can include parameters such as pressure in the coolant circulation loop. The water-cooling unit includes a control device, which can use a preset communication protocol to send a communication message to the signal converter; after receiving the communication message, the signal converter parses and processes the communication message based on the communication protocol to obtain the detection parameters of the coolant circulation loop carried by the communication message.

[0048] Step S102, controlling the filling machine to inject coolant into the coolant circulation loop according to the detection parameters.

[0049] The coolant filling control method disclosed in the present invention receives the communication message sent by the water cooling unit through the signal converter to obtain the detection parameters of the coolant circulation loop, and can control the filling machine to perform coolant injection processing according to the detection parameters; in the coolant filling process, the real state information of the coolant circulation loop can be accurately determined according to the detection parameters of the coolant circulation loop, and the coolant filling of the coolant circulation loop can be accurately controlled based on the real state of the coolant circulation loop, thereby improving the accuracy of the injection control of the coolant circulation loop, realizing the precise control of the coolant pressure, and being able to ensure that the coolant pressure in the water cooling unit meets the requirements, thereby improving the effect of the water cooling unit in thermal management of the battery and improving the quality of the energy storage device.

[0050] like Figure 2As shown, the liquid injection device 010 includes a filling machine 012, a signal converter 013 and a controller 011; the controller 011 can be set independently or integrated with the filling machine 012; the signal converter 013 can be set independently or integrated with the filling machine 012.

[0051] The energy storage device may be a container-type energy storage device or other energy storage devices. The energy storage device is equipped with a water cooling unit 020, and the water cooling unit 020 includes a coolant circulation loop. The signal converter 013 receives the communication message sent by the water cooling unit 020, and obtains the detection parameters of the coolant circulation loop based on the communication message; the controller 011 receives the detection parameters of the coolant circulation loop sent by the signal converter 013, and controls the filling machine 012 to inject the coolant into the coolant circulation loop of the water cooling unit 020 through the filling passage 014 according to the detection parameters.

[0052] like Figure 3 As shown, the water cooling unit includes a refrigerant circulation circuit 021 and a coolant circulation circuit 022. The refrigerant circulation circuit 021 includes a compressor 0211, a vapor-liquid separator 0212, a condenser 0213, a liquid storage tank 0214, a throttle valve 0215, an evaporator 0216, and the like.

[0053] The coolant circulation loop 022 includes a coolant pipeline 0221 , and a PTC (Positive Temperature Coefficient) heating unit 0223 and a water pump 0225 disposed in the coolant pipeline 0221 . The coolant can circulate in the coolant pipeline 0221 .

[0054] The refrigerant circulation loop 021 and the coolant circulation loop 022 can exchange heat through the evaporator 0216. The energy storage device includes an energy storage box 030, in which a water cooling plate 031 is arranged; the coolant circulation loop 022 exchanges heat with the battery of the energy storage device through the water cooling plate 031.

[0055] A sensor or the like may be provided in the coolant pipeline 0221 to collect detection parameters of the coolant pipeline 0221. The detection parameters of the coolant circulation loop of the present disclosure include the detection parameters of the coolant pipeline 0221. For example, an inlet pressure sensor 0222 may be provided in the coolant pipeline 0221 and at the inlet of the evaporator 0216, and an outlet pressure sensor 0224 may be provided in the coolant pipeline 0221 and at the outlet of the evaporator 0216. The inlet pressure sensor 0222 and the outlet pressure sensor 0224 collect pressure values ​​at the inlet and outlet of the evaporator 0216, respectively.

[0056] The detection parameters of the coolant circulation loop include the pressure value in the coolant circulation loop (i.e., the pressure value in the coolant pipeline 0221). This pressure value can be a variety of pressure values. For example, this pressure value can be the pressure value collected by the inlet pressure sensor 0222 or the outlet pressure sensor 0224; this pressure value can also be the pressure value obtained by using an existing fusion calculation method to fuse the pressure values ​​collected by the inlet pressure sensor 0222 and the outlet pressure sensor 0224.

[0057] Figure 4 FIG. 1 is a flow chart of initial liquid injection in some embodiments of the coolant filling control method disclosed in the present invention, such as Figure 4 As shown: Step S401, when the water pump in the coolant circulation loop is not running, controlling the filling machine to fill the coolant circulation loop with coolant.

[0058] Step S401, determining whether to stop the filling process according to the pressure value in the coolant circulation loop.

[0059] This filling process is the initial filling process when the water pump in the coolant circulation loop is not started. This pressure value uses a static pressure value. This static pressure value is used as the injection cut-off judgment pressure to determine whether to stop the filling process. When the water pump in the coolant circulation loop is not running, the filling machine is controlled to perform the filling process according to the static pressure value in the coolant circulation loop. The actual static pressure of the coolant circulation loop can be accurately determined, and the coolant filling of the coolant circulation loop can be precisely controlled based on the actual static pressure.

[0060] In some embodiments, a variety of methods may be used to determine whether to stop the filling process. The first pressure condition includes: the duration of the pressure value in the coolant circulation loop within the first pressure threshold range is greater than or equal to the first duration threshold; when it is determined that the pressure value in the coolant circulation loop meets the first pressure condition, it is determined whether the total amount of coolant filled in the filling process is greater than or equal to the qualified threshold of the filling amount, and when the total amount of coolant filled is greater than or equal to the qualified threshold of the filling amount, it is determined to stop the filling process. The filling machine may be provided with a flow meter for counting and determining the total amount of coolant filled in this filling process.

[0061] The first pressure threshold range can be determined based on the test results for various water cooling units. Different water cooling units can be set with different first pressure threshold ranges. For example, the first pressure threshold range is 2.0-3.0 bar. The first time threshold can be 8 seconds, 10 seconds, etc. The qualified threshold for liquid injection volume can be determined based on the test results for various water cooling units. The qualified threshold for liquid injection volume can be the lower limit of the coolant demand set according to the thermal management requirements of the water cooling unit.

[0062] For example, the first pressure condition includes: the pressure value in the coolant circulation loop is between 2.0-3.0 bar for a duration greater than or equal to 10 seconds; it can be determined in real time or periodically whether the pressure value in the coolant circulation loop satisfies the first pressure condition. When it is determined that the pressure value in the coolant circulation loop satisfies the first pressure condition, and the total amount of coolant filled during the filling process is greater than or equal to the qualified filling amount threshold, it is determined to stop the filling process.

[0063] By setting the first pressure condition, the accuracy of the static pressure value obtained can be improved, thereby improving the accuracy of the coolant filling control; when it is determined that the static pressure value in the coolant circulation loop meets the first pressure condition and the total amount of coolant filled during the filling process is greater than or equal to the qualified filling amount threshold, the filling process is stopped; based on the actual static pressure of the coolant circulation loop and the total amount of coolant filled, the coolant filling of the coolant circulation loop can be accurately controlled.

[0064] A variety of methods can be used to control the filling machine to perform the filling process of the coolant. For example, the filling machine is controlled to fill the coolant into the coolant circulation loop based on a first filling pressure and determine the amount of the filled coolant; when the amount of the coolant is greater than or equal to the injection amount threshold, the filling machine is controlled to fill the coolant into the coolant circulation loop based on a second filling pressure, and the first filling pressure is greater than the second filling pressure.

[0065] The first injection pressure, injection volume threshold, second injection pressure, etc. can be set according to the test results of the water cooling unit. For example, the first injection pressure can be less than or equal to 5 bar, the second injection pressure can be 2.5-2.6 bar, and the first injection pressure is greater than the second injection pressure; the filling machine can be controlled to perform high-pressure injection based on the first injection pressure, and the filling machine can be controlled to perform normal pressure injection based on the second injection pressure. The filling machine is equipped with a flow meter, and the flow meter can be used to count and determine the injection volume of the injected coolant, and the filling machine sends the injection volume of the coolant to the controller.

[0066] By controlling the filling machine to fill coolant into the coolant circulation loop based on high filling pressure and low filling pressure, the efficiency of filling coolant into the coolant circulation loop can be improved, and the control accuracy of coolant filling can be improved.

[0067] Figure 5 FIG. 1 is a flow chart of dynamic detection in some embodiments of the coolant filling control method disclosed in the present invention, such as Figure 5 As shown: Step S501, when it is determined to stop the filling process, a first instruction is sent to the water cooling unit, so that the water cooling unit controls the operation of the water pump according to the first instruction. The first instruction may be a self-circulation mode control instruction or the like.

[0068] Step S502, when the running time of the water pump is greater than or equal to the running time threshold, determine whether the pressure in the coolant circulation loop is qualified according to the pressure value in the coolant circulation loop, and perform corresponding control processing based on the determination result.

[0069] The operation time threshold can be set according to the test, and can be 3 minutes, etc. For example, when the operation time of the water pump is greater than or equal to 3 minutes, after the water pump runs stably, it is judged whether the pressure in the coolant circulation loop is qualified according to the dynamic pressure value of the coolant circulation loop, and corresponding control processing is performed based on the judgment result.

[0070] When the water pump in the coolant circulation loop is running, corresponding control processing is performed according to the dynamic pressure value in the coolant circulation loop, so that the actual dynamic pressure of the coolant circulation loop can be accurately determined, and the coolant filling of the coolant circulation loop can be accurately controlled based on the actual dynamic pressure.

[0071] Figure 6 FIG. 1 is a flow chart of adjusting the coolant filling in some embodiments of the coolant filling control method disclosed in the present invention, such as Figure 6 As shown: Step S601, when it is determined that the pressure value in the coolant circulation loop does not meet the second pressure condition, it is determined that the pressure in the coolant circulation loop is unqualified.

[0072] Step S602, when it is determined that the pressure in the coolant circulation loop is unqualified, control the filling machine to adjust the coolant filling of the coolant circulation loop until the pressure value in the coolant circulation loop meets the second pressure condition.

[0073] The second pressure condition includes: the duration of the pressure value in the coolant circulation loop within the second pressure threshold range is greater than the second time threshold. The second pressure threshold range can be determined based on the test results of various water cooling units, and different water cooling units can be set with different second pressure threshold ranges, for example, the second pressure threshold range is 1.0-4.5 bar, etc. The second time threshold can be set to 8 seconds, 10 seconds, etc.

[0074] For example, the second pressure condition includes: the pressure value in the coolant circulation loop is within the range of 1.0-4.5 bar for a duration greater than 10 seconds; it can be determined in real time or periodically whether the pressure value in the coolant circulation loop satisfies the second pressure condition. When it is determined that the pressure value in the coolant circulation loop does not satisfy the second pressure condition, the filling machine is controlled to perform coolant filling and adjustment processing on the coolant circulation loop until the pressure value in the coolant circulation loop satisfies the second pressure condition.

[0075] By setting the second pressure condition, the accuracy of the dynamic pressure value obtained can be improved, thereby improving the accuracy of the coolant filling control; when it is determined that the dynamic pressure value in the coolant circulation loop does not meet the second pressure condition, the filling machine is controlled to perform coolant filling adjustment processing until the dynamic pressure value meets the second pressure condition; the injection amount can be automatically adjusted when the injection is unqualified, without the need for operators to manually drain or re-pump and fill, and the coolant filling of the coolant circulation loop can be accurately controlled to ensure that the coolant pressure in the water-cooled unit meets the requirements.

[0076] When it is determined that the pressure value in the coolant circulation loop meets the second pressure condition, it is determined that the pressure in the coolant circulation loop is qualified; when it is determined that the pressure in the coolant circulation loop is qualified, a second instruction is sent to the water cooling unit, so that the water cooling unit controls the water pump to stop running and enter a standby state according to the second instruction.

[0077] For example, when the pressure value in the coolant circulation loop is within the range of 1.0-4.5 bar for more than 10 seconds, a second instruction is sent to the water cooling unit, so that the water cooling unit controls the water pump to stop running and enter the standby state according to the second instruction. When it is determined that the dynamic pressure value in the coolant circulation loop meets the second pressure condition, the water pump is controlled to stop running and enter the standby state, which can ensure that the coolant pressure in the water cooling unit meets the requirements and improve the cooling and heating effect of the water cooling unit for the battery.

[0078] A variety of methods can be used to control the filling machine to adjust the coolant filling process of the coolant circulation loop. For example, the filling machine is controlled to inject coolant into the coolant circulation loop based on a first volume setting value of a single coolant injection, and / or the filling machine is controlled to suck back the coolant in the coolant circulation loop based on a second volume setting value of a single coolant back suction.

[0079] The first capacity setting and the second capacity setting can be the same or different. For example, the first capacity setting and the second capacity setting are both 0.5 liters, etc. The solenoid valve of the control filling machine is opened, and the control filling machine is controlled to inject coolant into the coolant circulation loop based on the first capacity setting of 0.5 liters for a single injection of coolant, and the injection can be performed once or multiple times; or, the control filling machine is controlled to suck back the coolant in the coolant circulation loop based on the second capacity setting of 0.5 liters for a single back suction of coolant, and the back suction can be performed once or multiple times. By automatically starting the refilling or back suction program, 0.5L of coolant is added or subtracted in a quantitative form each time until the pressure value in the coolant circulation loop meets the second pressure condition.

[0080] Based on the fixed value of the single injection or back-absorption capacity, the filling machine is controlled to perform the injection or back-absorption of the coolant, which can improve the accuracy of automatically adjusting the injection amount and can accurately control the coolant filling of the coolant circulation loop.

[0081] In some embodiments, before controlling the filling machine to perform the filling process, the filling machine can be controlled to perform a vacuum process on the coolant circulation loop; when it is determined that the vacuuming qualified conditions are met, the filling machine is controlled to stop the vacuuming process; the vacuuming qualified conditions include: the vacuum degree in the coolant circulation loop is less than the vacuum degree threshold, and the duration of the vacuuming process is greater than or equal to the third duration threshold.

[0082] The injection equipment is provided with a vacuum pump connected to the injection gun, and the coolant circulation loop is vacuumed through the liquid filling port of the water cooling unit, and rough vacuuming and fine vacuuming can be performed in sequence. The vacuum degree threshold and the third time threshold can be determined based on the test results of different water cooling units, and different values ​​can be set for different water cooling units.

[0083] By controlling the filling machine to vacuum the coolant circulation loop before the filling process, the efficiency of the filling process can be improved. By performing the vacuum process based on the duration of the vacuum process and the vacuum degree in the coolant circulation loop, the accuracy of the vacuum process is improved.

[0084] In some embodiments, the signal converter of the injection equipment is connected to the communication interface of the water cooling unit; the water cooling unit uses a preset communication protocol to send a communication message to the signal converter, and the signal converter parses and processes the received communication message to obtain the detection parameters of the coolant circulation loop carried by the communication message; the controller controls the filling machine to inject the coolant into the coolant circulation loop according to the detection parameters.

[0085] The controller controls the filling gun of the filling machine to connect to the refilling port of the coolant of the water-cooled unit and open the stop valve of the refilling port; controls the vacuum pump of the filling machine (the vacuum pump is connected to the filling gun) to evacuate the coolant circulation loop; and controls the filling machine to stop the vacuuming process when it is determined that the vacuuming qualified conditions are met. If the vacuuming process is abnormal, the controller sends an alarm message to notify the staff to conduct an investigation.

[0086] After determining that the vacuuming qualified conditions are met and controlling the filling machine to stop the vacuuming process, the water pump in the coolant circulation loop is not started, and the controller controls the filling machine to perform high-pressure filling based on the first filling pressure and determines the amount of coolant to be filled; when the amount of coolant to be filled is greater than or equal to the injection amount threshold, the controller controls the filling machine to perform normal pressure filling based on the second filling pressure, and the first filling pressure is greater than the second filling pressure. If there is an abnormality in the high-pressure filling and / or normal pressure filling, the controller sends an alarm message to notify the staff to conduct an investigation.

[0087] The first pressure condition includes that the duration of the coolant circulation loop pressure value within the first pressure threshold range is greater than or equal to the first duration threshold; when it is determined that the pressure value in the coolant circulation loop satisfies the first pressure condition, and the total amount of coolant filled during the filling process is greater than or equal to the qualified filling amount threshold, it is determined to stop the filling process; if it is determined that the pressure value detection and / or the total amount of coolant filling detection is abnormal, the controller sends an alarm message to notify the staff to conduct an investigation.

[0088] The solenoid valve on the liquid injection gun is controlled to be closed, and a first instruction is issued to the water cooling unit, and the water cooling unit starts the water pump after receiving the first instruction. When the running time of the water pump is greater than or equal to the running time threshold, whether the pressure in the coolant circulation loop is qualified is judged according to the pressure value in the coolant circulation loop, and corresponding control processing is performed based on the judgment result.

[0089] The second pressure condition includes that the duration of the pressure value in the coolant circulation loop being within the second pressure threshold range is greater than the second duration threshold; when it is determined that the pressure value in the coolant circulation loop does not meet the second pressure condition, the pressure in the coolant circulation loop is determined to be unqualified; when it is determined that the pressure in the coolant circulation loop is unqualified, the filling machine is controlled to inject coolant into the coolant circulation loop based on a first volume constant for a single injection of coolant, and / or the filling machine is controlled to back-suck the coolant in the coolant circulation loop based on a second volume constant for a single back-sucking of coolant, until the pressure value in the coolant circulation loop meets the second pressure condition.

[0090] When it is determined that the pressure value in the coolant circulation loop meets the second pressure condition, the pressure in the coolant circulation loop is determined to be qualified, and a second instruction is sent to the water cooling unit, so that the water cooling unit controls the water pump to stop running and enter a standby state according to the second instruction, thereby ending the entire liquid injection process. If an abnormality occurs in the filling adjustment process, the controller sends an alarm message to notify the staff to conduct an investigation.

[0091] The coolant filling control method disclosed in the present invention can accurately determine the actual state of the coolant circulation loop according to the detection parameters of the coolant circulation loop during the coolant filling process, and can accurately control the coolant filling of the coolant circulation loop, thereby improving the accuracy of the liquid filling control of the coolant circulation loop, and can ensure that the coolant pressure in the water cooling unit meets the requirements, thereby improving the effect of the water cooling unit on thermal management of the battery, avoiding rework of the energy storage equipment, and improving the quality of the energy storage equipment.

[0092] In some embodiments, Figure 7 As shown, the present disclosure provides a coolant filling control device, which is applied to a controller. The coolant filling control device includes an information acquisition module 701 and a liquid filling control module 702. The information acquisition module 701 receives the detection parameters of the coolant circulation loop sent by the signal converter, wherein the signal converter receives the communication message sent by the water cooling unit and obtains the detection parameters based on the communication message. The liquid filling control module 702 controls the filling machine to inject the coolant according to the detection parameters.

[0093] In some embodiments, Figure 8 As shown, the liquid injection control module 702 includes a first liquid injection processing module 7021 and a second liquid injection processing module 7022. The first liquid injection processing module 7021 controls the filling machine to fill the coolant circulation loop with coolant when the water pump in the coolant circulation loop is not running; the first liquid injection processing module 7021 determines whether to stop the filling process according to the pressure value in the coolant circulation loop.

[0094] For example, the first liquid injection processing module 7021 controls the filling machine to add coolant into the coolant circulation loop based on a first liquid injection pressure and determines the injection amount of the added coolant; when the coolant injection amount is greater than or equal to the injection amount threshold, the first liquid injection processing module 7021 controls the filling machine to add coolant into the coolant circulation loop based on a second liquid injection pressure; wherein the first liquid injection pressure is greater than the second liquid injection pressure.

[0095] The first pressure condition includes: the duration of the pressure value in the coolant circulation loop within the first pressure threshold range is greater than or equal to the first duration threshold. When the first injection processing module 7021 determines that the pressure value in the coolant circulation loop meets the first pressure condition, it determines whether the total amount of coolant added during the injection process is greater than or equal to the injection amount qualified threshold; when the total amount of coolant added is greater than or equal to the injection amount qualified threshold, the first injection processing module 7021 determines to stop the injection process.

[0096] When it is determined that the filling process is to be stopped, the second liquid injection processing module 7022 sends a first instruction to the water cooling unit, so that the water cooling unit controls the operation of the water pump according to the first instruction; when the operating time of the water pump is greater than or equal to the operating time threshold, the second liquid injection processing module 7022 judges whether the pressure in the coolant circulation loop is qualified according to the pressure value in the coolant circulation loop, and performs corresponding control processing based on the judgment result.

[0097] The second pressure condition includes: the duration of the pressure value in the coolant circulation loop within the second pressure threshold range is greater than the second duration threshold. When the second injection processing module 7022 determines that the pressure in the coolant circulation loop does not meet the second pressure condition, it determines that the pressure in the coolant circulation loop is unqualified; when the second injection processing module 7022 determines that the pressure in the coolant circulation loop is unqualified, it controls the filling machine to perform coolant filling and adjustment processing on the coolant circulation loop until the pressure value in the coolant circulation loop meets the second pressure condition.

[0098] For example, the second liquid injection processing module 7022 controls the filling machine to inject coolant into the coolant circulation loop based on the first volume set value of a single injection of coolant, or the second liquid injection processing module 7022 controls the filling machine to suck back the coolant in the coolant circulation loop based on the second volume set value of a single back suction of coolant.

[0099] The second liquid injection processing module 7022 determines that the pressure in the coolant circulation loop is qualified when it is determined that the pressure value in the coolant circulation loop meets the second pressure condition; the second liquid injection processing module 7022 sends a second instruction to the water cooling unit when it is determined that the pressure in the coolant circulation loop is qualified, so that the water cooling unit controls the water pump to stop running and enter standby state according to the second instruction.

[0100] In some embodiments, Fig. 9 As shown, the coolant filling control device includes not only the information acquisition module 701 and the filling control module 702, but also a vacuum module 703. Before controlling the filling machine to perform filling processing, the vacuum module 703 controls the filling machine to perform vacuum processing on the coolant circulation loop; when determining that the vacuum qualified conditions are met, the vacuum module 703 controls the filling machine to stop the vacuum processing. The vacuum qualified conditions include: the vacuum degree in the coolant circulation loop is less than the vacuum degree threshold, and the duration of the vacuum processing is greater than or equal to the third duration threshold.

[0101] Fig.10 Schematic diagram of the modules of some embodiments of the controller according to the present disclosure. Fig.10As shown, the controller may include a memory 1001, a processor 1002, a communication interface 1003 and a bus 1004. The memory 1001 is used to store instructions, the processor 1002 is coupled to the memory 1001, and the processor 1002 is configured to execute the above-mentioned coolant filling control method based on the instructions stored in the memory 1001.

[0102] The memory 1001 may be a high-speed RAM memory, a non-volatile memory, etc. The memory 1001 may also be a memory array. The memory 1001 may also be divided into blocks, and the blocks may be combined into virtual volumes according to certain rules. The processor 1002 may be a central processing unit CPU, or an application-specific integrated circuit ASIC (Application Specific Integrated Circuit), or one or more integrated circuits configured to implement the coolant filling control method disclosed in the present invention.

[0103] In some embodiments, the present disclosure provides a liquid injection device, including: a filling machine, a signal converter, and a controller as in any of the above embodiments.

[0104] In some embodiments, the present disclosure provides a computer-readable storage medium storing computer instructions, and the instructions are executed by a processor to implement the coolant filling control method in any of the above embodiments.

[0105] Computer readable storage media can adopt any combination of one or more readable media. The readable medium can be a readable signal medium or a readable storage medium. The readable storage medium can include, for example, but is not limited to, a system, device or device of electricity, magnetism, light, electromagnetic, infrared, or semiconductor, or any combination of the above. More specific examples (non-exhaustive enumeration) of readable storage media can include: an electrical connection with one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above.

[0106] The present disclosure is described with reference to flowcharts and / or block diagrams of methods, devices (systems) and computer program products according to embodiments of the present disclosure. It should be understood that each process and / or block in the flowchart and / or block diagram and the combination of processes and / or blocks in the flowchart and / or block diagram can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0107] The embodiments of the present disclosure may also be a computer program product, which includes computer program instructions, which, when executed by a processor, enable the processor to execute the steps of the coolant filling control method according to various embodiments of the present disclosure described in the above “Exemplary Method” section of this specification.

[0108] The steps of the method of the present disclosure are not limited to the order specifically described above, unless otherwise specifically stated. In addition, in some embodiments, the present disclosure may also be implemented as a program recorded in a recording medium, which includes machine-readable instructions for implementing the method according to the present disclosure. Thus, the present disclosure also covers a recording medium storing a program for executing the method according to the present disclosure.

[0109] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A method for controlling the filling of a coolant, wherein: The water cooling unit includes a coolant circulation loop, and the liquid injection equipment includes a filling machine, a signal converter and a controller; the coolant filling control method is applied to the controller, including: Receiving the detection parameters of the coolant circulation loop sent by the signal converter, wherein the signal converter receives the communication message sent by the water cooling unit, and obtains the detection parameters based on the communication message; According to the detection parameters, controlling the filling machine to inject coolant into the coolant circulation loop; Wherein, the detection parameter includes a pressure value in the coolant circulation loop, and controlling the filling machine to inject coolant into the coolant circulation loop according to the detection parameter includes: When the water pump in the coolant circulation loop is not running, controlling the filling machine to fill the coolant circulation loop with coolant; determining whether to stop the filling process according to the pressure value; In the case where it is determined to stop the filling process, sending a first instruction to the water cooling unit, so that the water cooling unit controls the operation of the water pump according to the first instruction; When the running time of the water pump is greater than or equal to the running time threshold, it is judged whether the pressure in the coolant circulation loop is qualified according to the pressure value, and corresponding control processing is performed based on the judgment result.

2. The method of claim 1, wherein: The determining whether to stop the filling process according to the pressure value includes: When it is determined that the pressure value satisfies the first pressure condition, determining whether the total amount of coolant added during the filling process is greater than or equal to a qualified threshold value of the amount of coolant added; When the total amount of coolant added is greater than or equal to the qualified threshold of the amount of coolant added, it is determined to stop the filling process.

3. The method of claim 2, wherein: The first pressure condition includes: the duration of the pressure value within the first pressure threshold range is greater than or equal to a first duration threshold.

4. The method of claim 1, wherein: The determining whether the pressure in the coolant circulation loop is qualified according to the pressure value, and performing corresponding control processing based on the determination result includes: In the case where it is determined that the pressure value does not satisfy the second pressure condition, determining that the pressure in the coolant circulation loop is unqualified; When it is determined that the pressure in the coolant circulation loop is unqualified, the filling machine is controlled to perform a coolant filling and adjustment process on the coolant circulation loop until the pressure value meets the second pressure condition.

5. The method of claim 4, wherein: The determining whether the pressure in the coolant circulation loop is qualified according to the pressure value, and performing corresponding control processing based on the determination result includes: When it is determined that the pressure value satisfies the second pressure condition, determining that the pressure in the coolant circulation loop is qualified; When it is determined that the pressure in the coolant circulation loop is qualified, a second instruction is sent to the water cooling unit, so that the water cooling unit controls the water pump to stop running and enter a standby state according to the second instruction.

6. The method of claim 4, wherein: The controlling the filling machine to perform a cooling liquid filling and adjustment process on the cooling liquid circulation loop includes: The filling machine is controlled to inject coolant into the coolant circulation loop based on a first volume set value for a single injection of coolant, and / or the filling machine is controlled to suck back the coolant in the coolant circulation loop based on a second volume set value for a single back suction of coolant.

7. The method of claim 4, wherein: The second pressure condition includes: the duration of the pressure value within the second pressure threshold range is greater than a second duration threshold.

8. The method according to any one of claims 1 to 7, wherein: The controlling the filling machine to fill the coolant circulation loop with coolant includes: Controlling the filling machine to fill coolant into the coolant circulation loop based on a first liquid filling pressure and determining an injection amount of the filled coolant; When the coolant injection amount is greater than or equal to the injection amount threshold, controlling the filling machine to fill the coolant into the coolant circulation loop based on a second injection pressure; Wherein, the first injection pressure is greater than the second injection pressure.

9. The method according to any one of claims 1 to 7, comprising: Before controlling the filling machine to perform the filling process, controlling the filling machine to perform a vacuum process on the coolant circulation loop; When it is determined that the vacuuming qualified condition is met, the filling machine is controlled to stop the vacuuming process.

10. The method of claim 9, wherein: The vacuuming qualified condition includes: the vacuum degree in the coolant circulation loop is less than a vacuum degree threshold, and the duration of the vacuuming process is greater than or equal to a third duration threshold.

11. A coolant filling control device, wherein: The water cooling unit includes a coolant circulation loop, and the liquid injection equipment includes a filling machine, a signal converter and a controller; the coolant filling control device is applied to the controller, including: An information acquisition module, used to receive the detection parameters of the coolant circulation loop sent by the signal converter, wherein the signal converter receives the communication message sent by the water cooling unit and acquires the detection parameters based on the communication message; A liquid injection control module, used for controlling the filling machine to inject coolant into the coolant circulation loop according to the detection parameters; Wherein, the detection parameter includes the pressure value in the coolant circulation loop, and the injection control module includes: A first liquid filling processing module is used to control the filling machine to fill the coolant circulation loop with coolant when the water pump in the coolant circulation loop is not running; and determine whether to stop the filling process according to the pressure value; The second liquid injection processing module is used to send a first instruction to the water cooling unit when it is determined to stop the filling process, so that the water cooling unit controls the operation of the water pump according to the first instruction; when the operating time of the water pump is greater than or equal to the operating time threshold, judge whether the pressure in the coolant circulation loop is qualified according to the pressure value, and perform corresponding control processing based on the judgment result.

12. A controller comprising: Memory; and a processor coupled to the memory, wherein the processor is configured to execute the method according to any one of claims 1 to 10 based on instructions stored in the memory.

13. A liquid injection device comprising: A filling machine, a signal converter and a controller as claimed in claim 12.

14. A computer-readable storage medium storing computer instructions, wherein the computer instructions are executed by a processor to execute the method according to any one of claims 1 to 10.

15. A computer program product, wherein the computer program product stores computer instructions, wherein the computer instructions are executed by a processor to execute the method according to any one of claims 1 to 10.

Images