Energy storage device and energy storage system

Abstract

The utility model relates to energy storage equipment and an energy storage system. The energy storage equipment comprises a battery device; the liquid cooling unit is configured to be used for providing cooling liquid for heat exchange with the battery device, the liquid cooling unit comprises a sensor assembly, and the sensor assembly is used for detecting the pressure of the cooling liquid; the sensor assembly comprises a sensor body, and a connecting piece is formed on the sensor body; the wire harness assembly is provided with a plug-in piece matched with the connecting piece in a plug-in mode, and a first gap is formed in the plug-in position of the connecting piece and the plug-in piece; and the insulating part is constructed to be of a plastic structure and wraps the connecting piece and the plug-in piece according to the shape matched with the outline of the connecting piece and the plug-in piece which are in plug-in fit so as to seal the first gap. According to the energy storage equipment, the failure probability of the sensor assembly can be reduced, the use stability and reliability of the sensor assembly are improved, and the use stability and reliability of the energy storage equipment are correspondingly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of energy storage, and in particular to an energy storage device and an energy storage system. BACKGROUND

[0002] In the related art, in a complex and harsh working condition environment, water vapor easily enters the inside of a sensor in an energy storage device and contacts a circuit board inside the sensor, causing condensation water to appear on the circuit board of the sensor, resulting in abnormal output of a conditioning circuit of the sensor and leading to failure of the sensor. CONTENT OF THE UTILITY MODEL

[0003] The present application aims to at least solve the problem that water vapor in the current environment easily enters the inside of a pressure sensor and contacts a circuit board, forming condensation water and leading to failure of the sensor. To this end, the present application provides an energy storage device.

[0004] In a first aspect, the present application provides an energy storage device, comprising:

[0005] a battery device;

[0006] a liquid cooling unit configured to provide cooling liquid for heat exchange with the battery device, the liquid cooling unit comprising a sensor assembly configured to detect a pressure of the cooling liquid;

[0007] The sensor assembly comprises:

[0008] a sensor body, the sensor body having a connecting piece formed thereon;

[0009] a wire harness assembly having a counterpart plug that is plugged with the connecting piece, the connecting piece and the counterpart plug having a first gap at the plug joint;

[0010] an insulating piece configured as a plastic structure, the insulating piece being wrapped around the connecting piece and the counterpart plug in a shape that matches the outer contour of the connecting piece and the counterpart plug in plug cooperation, so as to seal the first gap.

[0011] The energy storage device according to the first aspect of the present application has at least the following beneficial effects:

[0012] The energy storage device of the present application sets an insulating piece on the sensor assembly, and configures the insulating piece as a plastic structure, so that the insulating piece can be shaped to match the shape of the plug-in connection and the counter plug, the insulating piece can wrap the plug-in connection and the counter plug according to the shape matching the plug-in connection and the counter plug, so as to isolate the plug-in connection and the counter plug from the ambient air through the insulating piece, realize the effect of completely sealing the first gap between the plug-in connection and the counter plug, so that the water vapor in the environment cannot enter the sensor body through the first gap to form condensate on the circuit board in the sensor body, reduce the probability of abnormal output of the conditioning circuit on the circuit board, and further reduce the probability of failure of the sensor assembly, improve the use stability and reliability of the sensor assembly, also make the liquid cooling unit more accurately control the temperature of the battery device, and correspondingly improve the use stability and reliability of the energy storage device.

[0013] In some embodiments, the wire harness assembly further includes a signal line connected to the counter plug, the connection between the counter plug and the signal line has a second gap, and the insulating piece further extends from the counter plug to wrap at least part of the signal line to seal the second gap.

[0014] In this way, the insulating piece completely wraps the connection between the counter plug and the signal line, seals the second gap, so that the water vapor in the environment cannot enter the counter plug through the second gap and enter the sensor body along the inner cavity of the counter plug, further reduces the probability of failure of the sensor assembly, improves the use stability and reliability of the sensor assembly, and further improves the use stability and reliability of the energy storage device.

[0015] In some embodiments, the sensor assembly further includes a mounting base, the sensor body is detachably connected to the mounting base, and the connection between the sensor body and the mounting base has a third gap;

[0016] The insulating piece also wraps the sensor body according to the shape matching the outer contour of the sensor body, and extends from the sensor body to wrap at least part of the mounting base to seal the third gap.

[0017] In this way, the insulating piece completely wraps the connection between the sensor body and the mounting base, seals the third gap, so that the water vapor in the environment cannot enter the sensor body through the third gap, further reduces the probability of failure of the sensor assembly, improves the use stability and reliability of the sensor assembly, and further improves the use stability and reliability of the energy storage device.

[0018] In some embodiments, the insulating member is configured as an insulating mastic structure.

[0019] In this way, the insulating member is shaped by applying extrusion force to the insulating mastic to adaptively fit the corresponding parts on the sensor assembly.

[0020] In some embodiments, the sensor assembly further comprises a protective tape, which is fixed to the outer periphery of the insulating member in a ring shape to cover at least part of the insulating member.

[0021] In this way, the protective tape shapes the insulating member, making the mastic on the insulating member more tightly and firmly bonded, reducing the probability of loosening or falling off of the insulating member during normal operation of the sensor assembly, and improving the sealing effect of the insulating member on the connecting gaps on the sensor assembly.

[0022] In some embodiments, the outer periphery of the insulating member is shaped as a circumferential surface, and the wrapping length of the protective tape is greater than or equal to four-thirds of the circumference of the insulating member.

[0023] In this way, the protective tape shapes the insulating member along the circumference of the insulating member, further making the mastic on the insulating member more tightly and firmly bonded, reducing the probability of loosening or falling off of the insulating member during normal operation of the sensor assembly, and improving the sealing effect of the insulating member on the connecting gaps on the sensor assembly.

[0024] In some embodiments, the protective tape is configured as a polyethylene copolymer structure.

[0025] In this way, the polyethylene copolymer has good weather resistance, making the protective tape have better resistance in complex and harsh environments, improving the structural stability of the protective tape, and directly improving the stability of the insulating member in wrapping the corresponding parts on the sensor assembly.

[0026] In some embodiments, the insulating member is configured as a heat-shrinkable sleeve structure, and the inner wall of the heat-shrinkable sleeve is attached with a hot melt adhesive layer that can be heated and melted to fill the first gap.

[0027] In this way, the heat-shrinkable sleeve is shaped to match the shape of the mounting base, the sensor body, the connecting member, the plug-in member, and part of the signal line, so that the heat-shrinkable sleeve completely fits and wraps the mounting base, the sensor body, the connecting member, the plug-in member, and part of the signal line.

[0028] In some embodiments, the heat-shrinkable sleeve is an irradiation cross-linked polyolefin heat-shrinkable sleeve.

[0029] Thus, the cross-linked polyolefin heat-shrinkable sleeve has good wear resistance, insulation, corrosion resistance, solvent resistance and high flame resistance, so that the heat-shrinkable sleeve can maintain good structural stability during use, and the stability of the heat-shrinkable sleeve to the corresponding part of the sensor assembly is also improved.

[0030] In a second aspect, the application provides an energy storage system, comprising the energy storage device.

[0031] According to the energy storage system of the second aspect of the application, at least the following beneficial effects are achieved:

[0032] The energy storage system of the application has good use stability and reliability due to the configuration of the energy storage device, and the sensor assembly and the liquid cooling unit on the energy storage device have good use stability and reliability, thereby improving the use stability and reliability of the energy storage system.

[0033] The above description is only a summary of the technical solutions of the application. In order to make the technical means of the application more clear, the application can be implemented according to the content of the specification, and in order to make the above and other purposes, characteristics and advantages of the application more obvious and easy to understand, the following specific embodiments of the application are described. BRIEF DESCRIPTION OF DRAWINGS

[0034] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of the preferred embodiments and are not meant to limit the scope of the application. Moreover, the same reference numerals in the attached drawings indicate the same or similar elements. In the drawings:

[0035] Figure 1 The structural system diagram of the energy storage device of the embodiment of the application.

[0036] Figure 2 The structural schematic diagram of the battery device of the embodiment of the application.

[0037] Figure 3 The structural schematic diagram of the sensor assembly hidden insulation piece of the embodiment of the application.

[0038] Figure 4 The cooperation structural schematic diagram of the insulation piece before shaping with the sensor body, the wire harness assembly and the mounting base of the embodiment of the application.

[0039] Figure 5 The cooperation structural schematic diagram of the insulation piece after shaping with the sensor body, the wire harness assembly and the mounting base of the embodiment of the application.

[0040] Figure 6A structural schematic diagram of a sensor assembly of an embodiment of the present application.

[0041] Figure 7 A structural schematic diagram of an energy storage system of an embodiment of the present application.

[0042] Legend: liquid cooling unit 1; battery device 2; battery monomer 21; shell 22; water cooling plate 23; sensor assembly 10; sensor body 11; connecting piece 12; wire harness assembly 13; plug-in part 131; signal wire 132; insulating part 14; mounting base 15; protective tape 16; first gap g1; second gap g2; third gap g3; water outlet pipeline 20; monitoring background 101; system controller 102; energy storage sub-module 103; battery management controller 104; sub-module controller 105. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0044] In the description of the present application, it should be understood that if these terms “center”, “longitudinal”, “transverse”, “length”, “width”, “thickness”, “upper”, “lower”, “front”, “rear”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential” and the like appear, these terms indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0045] In addition, if these terms “first”, “second” appear, these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited by “first”, “second” can explicitly or implicitly include at least one of the features. In the description of the present application, if the term “multiple” appears, the meaning of “multiple” is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0046] In the present application, unless specifically defined otherwise, if there are terms such as "mount", "connect", "connect", "fix" and the like, these terms should be interpreted in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically defined. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0047] In the present application, unless specifically defined otherwise, if there are terms such as "mount", "connect", "connect", "fix" and the like, these terms should be interpreted in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically defined. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0048] It should be noted that if an element is referred to as "fixed to" or "provided on" another element, it can be directly on another element or there can be a middle element. If an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. If present, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in the present application are for illustrative purposes only and are not the only embodiment.

[0049] At present, environmental damage and resource consumption are increasingly serious, and the demand for devices that can store energy and effectively utilize stored energy is increasing. Energy storage devices can be new renewable energy systems, battery systems and existing power systems combined with each other, which do not cause or almost do not cause pollution (for example, cause minimal pollution) in the process of generating electricity.

[0050] In the energy storage device, a battery device is provided and a liquid cooling unit is provided, and the low-temperature cooling liquid provided by the liquid cooling unit exchanges heat with the battery to take away the heat generated by the battery device during operation. The inlet and outlet of the water pump of the liquid cooling unit will be provided with a pressure sensor (water pressure sensor) respectively, for real-time detection of the pressure of the low-temperature cooling liquid provided by the liquid cooling unit.

[0051] The female plug end button of the pressure sensor is provided with a wire harness assembly, and the male plug end button of the wire harness assembly is matched with the female plug end button. After the pressure sensor is installed on the corresponding position of the pipeline of the liquid cooling unit, the male plug end button of the wire harness assembly is matched with the female plug end button of the pressure sensor, the pin needle on the male plug end button of the wire harness assembly is matched with the pin needle on the female plug end button of the pressure sensor, an electrical signal connection is formed, the signal line of the wire harness assembly is connected to the main controller, and the assembly of the pressure sensor is completed.

[0052] When the pressure of the cooling liquid is detected, the pressure of the measured cooling liquid directly acts on the strain gauge inside the pressure sensor, so that the strain gauge generates compression strain, and the resistance value of the pressure sensor changes. The conditioning circuit on the circuit board in contact with the strain gauge detects the change of the resistance value, and outputs the detection signal to the main controller through the pin needle on the female plug end button of the pressure sensor, the pin needle on the male plug end button of the wire harness assembly and the signal line of the wire harness assembly. The main controller converts and outputs a standard measurement signal corresponding to the pressure.

[0053] The inventor finds that after the pressure sensor is completely installed on the corresponding position of the pipeline of the liquid cooling unit, due to the manufacturing tolerance of the male plug end button of the wire harness assembly and the female plug end button of the pressure sensor, there is a gap between the male plug end button of the wire harness assembly and the female plug end button of the pressure sensor. At the same time, the lower surface of the strain gauge installed inside the pressure sensor is in contact with the cooling liquid at all times during normal operation of the energy storage device, and the upper surface is in contact with the circuit board inside the pressure sensor, so that the surface temperature of the circuit board is always low.

[0054] When the energy storage device operates in a more complex and harsh environment, water vapor in the environment easily enters the internal cavity of the pressure sensor through the gap between the male plug end button and the female plug end button, and flows into the position of the circuit board along the internal cavity. Because the temperature of the water vapor in the environment is higher than that of the surface of the circuit board, the water vapor easily forms condensate water after contacting the circuit board, causing the conditioning circuit on the circuit board to output abnormally and leading to failure of the sensor.

[0055] Based on this, addressing the problem that moisture in the environment can easily enter the pressure sensor and condense on the circuit board, leading to sensor failure, one or more embodiments of this application provide an energy storage device. By setting an insulating component on the sensor assembly and constructing the insulating component as a plastic structure, the insulating component can be shaped to match the outline of the plug-in connector and the plug-in insert. While providing insulation and protection, the insulating component also wraps around the connector and plug-in insert according to their outline, isolating them from the ambient air. This completely seals the first gap at the connection between the connector and the plug-in insert, preventing moisture from entering the sensor body and condensing on the circuit board inside. This reduces the probability of abnormal output from the conditioning circuit on the circuit board, thereby reducing the probability of sensor assembly failure and improving the stability and reliability of the sensor assembly. It also allows the liquid cooling unit to more accurately control the temperature of the battery device, thus improving the stability and reliability of the energy storage device.

[0056] See Figure 1 This application provides an energy storage device, which includes a battery device 2 and a liquid cooling unit 1.

[0057] The liquid cooling unit 1 is configured to provide coolant for heat exchange with the battery device 2. The liquid cooling unit 1 includes a sensor assembly 10 for detecting the pressure of the coolant.

[0058] The sensor assembly 10 includes a sensor body 11, a wiring harness assembly 13, and an insulator 14.

[0059] The sensor body 11 has a connector 12. The wiring harness assembly 13 has a plug-in 131 that engages with the connector 12, and the connection point between the connector 12 and the plug-in 131 has a first gap g1.

[0060] The insulating member 14 is constructed as a plastic structure, and the insulating member 14 wraps around the connector 12 and the plug-in 131 in a shape that matches the outer contour of the connector 12 and the plug-in 131 to seal the first gap g1.

[0061] It should be noted that in this application, the energy storage device may also include an energy storage container (not shown in the figure), which contains multiple battery cabinets, and the battery device 2 is installed inside the battery cabinets. The battery device 2 can be understood as a battery pack, battery module, etc.

[0062] The battery device 2 is used to provide electric energy, and the battery device 2 comprises a battery monomer 21, a battery management system (BMS), a heat dissipation system, a shell 22 and the like. The BMS is an intelligent control system in the battery device 2, which can monitor the voltage, temperature, current and the like of the battery monomer 21, and manage and protect the battery monomer 21 according to these parameters. The BMS can also control the charging and discharging process of the battery device 2, and improve the safety and stability of the battery device 2. The battery monomer 21 can be a secondary battery, which refers to a battery monomer that can be activated by charging after discharging. The battery monomer 21 can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead-acid battery and the like, and the present application is not limited thereto.

[0063] Exemplarily, the energy storage equipment of the present application comprises a plurality of battery cabinets, and the battery device 2 is arranged in the battery cabinet. The battery cabinet provides installation space for the battery device 2, and is used to accommodate and protect the battery device 2, thereby ensuring the stability and reliability of power supply of the energy storage equipment.

[0064] Exemplarily, referring to Figure 1 and Figure 2 , the battery device 2 further comprises a water cooling plate 23 arranged on the inner wall of the bottom of the shell 22 of the battery device 2. All the battery monomers 21 are placed in abutment on the water cooling plate 23 and accommodated in the shell 22, and a cooling cavity for circulating cooling liquid is formed in the water cooling plate 23. The liquid cooling unit 1 is in circulation communication with the cooling cavity of the water cooling plate 23 through a pipeline, so as to deliver cooling liquid to the cooling cavity of the water cooling plate 23. The cooling liquid exchanges heat with the battery monomers 21, and efficiently takes away the heat generated by the battery monomers 21 during work, so that the battery monomers 21 and the battery device 2 as a whole operate at a relatively ideal working temperature.

[0065] In the present application, the liquid cooling unit 1 can be a liquid cooling system composed of a circulating pump, a compressor, a cooling fin, a fan and the like. The cooling liquid used by the liquid cooling unit 1 can be a glycol water solution. By virtue of the large specific heat capacity of the glycol water solution, the temperature of the battery device 2 can be efficiently reduced, and the temperature of the battery device 2 can be accurately controlled.

[0066] In the liquid cooling unit 1, the sensor assembly 10 can be arranged on the water inlet pipeline and / or the water outlet pipeline of the circulating pump, so as to detect the pressure of the cooling liquid output by the liquid cooling unit 1.

[0067] In the sensor assembly 10 of the present application, the sensor body 11 can be understood as a structure formed by the combination of the housing of the pressure sensor, the strain gauge arranged in the housing, and the functional elements such as the circuit board. The sensor body 11 can be a regular solid of revolution structure such as a prism or a cylinder. Of course, the sensor body 11 can also be an irregular shape structure, which is not limited in particular.

[0068] The connecting piece 12 formed on the sensor body 11 can be understood as a female or male plug. The connecting piece 12 is an integral structure with the sensor body 11, and can be a regular solid of revolution structure or an irregular shape structure, which is not limited in particular. The connecting piece 12 has a first pin (see Figure 5 and Figure 6 ).

[0069] Correspondingly, the counter plug 131 of the wire harness assembly 13 can be understood as a male or female plug, and can be a regular solid of revolution structure or an irregular shape structure, which is not limited in particular. The counter plug 131 has a second pin (see Figure 5 and Figure 6 ). It is easy to understand that when the connecting piece 12 is plugged with the counter plug 131, the first pin of the connecting piece 12 is connected with the second pin of the counter plug 131, forming an electrical signal connection.

[0070] It should be noted that the insulating piece 14 of the present application is a plastic structure, so that the insulating piece 14 can be shaped into any shape under the action of external factors.

[0071] For example, in some embodiments, the insulating piece 14 can be insulating cement. At this time, the external factor is an external force, which extrudes the insulating cement to cause plastic deformation of the insulating cement, so as to shape the insulating cement into the required shape. In this embodiment, the operator can directly wrap the insulating cement around the plugged connecting piece 12 and the counter plug 131, so that the insulating cement covers the plugged connecting piece 12 and the counter plug 131, and then presses the insulating cement to match the shape of the plugged connecting piece 12 and the counter plug 131, so as to attach and wrap the plugged connecting piece 12 and the counter plug 131, expel the air between the insulating cement and the connecting piece 12 and the counter plug, and make the insulating cement completely adhere to and wrap the plugged connecting piece 12 and the counter plug, so as to seal the first gap g1 between the connecting piece 12 and the counter plug.

[0072] Thus, by insulating the plug-in connection 12 and the counter plug from the ambient air through the insulating cement, the first gap g1 at the connection between the plug-in connection 12 and the counter plug is completely sealed, so that the water vapor in the environment cannot enter the inside of the sensor body 11 through the first gap g1 to form condensate on the circuit board inside the sensor body 11, reducing the probability of abnormal output of the conditioning circuit on the circuit board, and further reducing the probability of failure of the sensor assembly 10, improving the use stability and reliability of the sensor assembly 10, and also enabling the liquid cooling unit 1 to more accurately control the temperature of the battery device 2, thereby improving the use stability and reliability of the energy storage equipment.

[0073] Of course, in other embodiments, the insulating member 14 can also be a heat shrinkable sleeve with a hot melt adhesive layer attached to the inner wall. At this time, the external factor is the heating of the heat shrinkable sleeve by the external hot air. The external high-temperature hot air heats the heat shrinkable sleeve, causing the hot melt adhesive layer on the inner wall of the heat shrinkable sleeve to melt, and at the same time, the heat shrinkable sleeve shrinks at high temperature, causing the heat shrinkable sleeve to plastically deform, thereby shaping the heat shrinkable sleeve into the desired shape.

[0074] It should be understood that under this embodiment, the operator can pre-attach the heat shrinkable sleeve with the hot melt adhesive layer on the inner wall to the plug-in connection 12 and the counter plug 131, so that the heat shrinkable sleeve covers the plug-in connection 12 and the counter plug 131. Then, the high-temperature hot air is directed at the outer wall of the heat shrinkable sleeve to heat the heat shrinkable sleeve, causing the hot melt adhesive layer on the inner wall of the heat shrinkable sleeve to melt at high temperature, and the melted hot melt adhesive layer can fill the first gap g1 at the connection between the plug-in connection 12 and the counter plug; at the same time, the heat shrinkable sleeve shrinks, so that the heat shrinkable sleeve can be attached and wrapped around the plug-in connection 12 and the counter plug in a shape matching the outer contour of the plug-in connection 12 and the counter plug 131, thereby sealing the first gap g1 at the connection between the plug-in connection 12 and the counter plug by the hot melt adhesive layer on the inner wall of the heat shrinkable sleeve.

[0075] Thus, by insulating the plug-in connection 12 and the counter plug from the ambient air through the insulating cement, the first gap g1 at the connection between the plug-in connection 12 and the counter plug is completely sealed, so that the water vapor in the environment cannot enter the inside of the sensor body 11 through the first gap g1 to form condensate on the circuit board inside the sensor body 11, reducing the probability of abnormal output of the conditioning circuit on the circuit board, and further reducing the probability of failure of the sensor assembly 10, improving the use stability and reliability of the sensor assembly 10, and also enabling the liquid cooling unit 1 to more accurately control the temperature of the battery device 2, thereby improving the use stability and reliability of the energy storage equipment.

[0076] It is understandable that the energy storage device of the embodiment of the application, by providing the insulating piece 14 on the sensor assembly 10 and configuring the insulating piece 14 as a plastic structure, the insulating piece 14 can be shaped to match the shape of the plug-in connecting piece 12 and the counter plug 131, the insulating piece 14 can wrap the connecting piece 12 and the counter plug 131 according to the shape matching the outer contour of the plug-in connecting piece 12 and the counter plug 131, so as to insulate the plug-in connecting piece 12 and the counter plug from the ambient air through the insulating piece 14, realize the effect of completely sealing the first gap g1 between the connecting piece 12 and the counter plug, so that the water vapor in the environment cannot enter the inside of the sensor body 11 through the first gap g1 to form condensate on the circuit board in the sensor body 11, reduce the probability of abnormal output of the conditioning circuit on the circuit board, and further reduce the probability of failure of the sensor assembly 10, improve the use stability and reliability of the sensor assembly 10, and also make the liquid cooling unit 1 be able to more accurately control the temperature of the battery device 2, and correspondingly improve the use stability and reliability of the energy storage device.

[0077] In some embodiments of the application, referring to Figure 3 、 Figure 4 and Figure 5 , wherein, Figure 5 is a schematic view of the cooperation structure of the insulating piece of the embodiment of the application after shaping with the sensor body, the wire harness assembly and the mounting base. The wire harness assembly 13 further includes a signal line 132 connected to the counter plug 131, and the connection between the counter plug 131 and the signal line 132 has a second gap g2, and the insulating piece 14 further extends to wrap at least part of the signal line 132 from the counter plug 131 to seal the second gap g2.

[0078] It is easy to understand that when the counter plug 131 is in plug-in cooperation with the connecting piece 12, the first pin on the connecting piece 12 is connected to the second pin on the counter plug 131, forming an electrical signal connection. At the same time, the signal line 132 on the counter plug 131 is connected to the main controller, so that the electrical signal connection between the sensor body 11 and the main controller is realized.

[0079] It should be noted that the signal line 132 can be a metal wire, and the outer layer of the signal line 132 can be wrapped with an insulating rubber sleeve to insulate and protect the signal line 132. The signal line 132 can be connected to the counter plug 131 by welding, crimping or the like. Due to the assembly tolerance in the process of connecting the signal line 132 to the counter plug 131, there is a connection gap between the signal line 132 and the counter plug 131, i.e. the second gap g2.

[0080] Based on this, the insulating piece 14 is extended from the counter plug 131 to wrap at least part of the signal line 132, so that the insulating piece 14 completely wraps the connection between the counter plug 131 and the signal line 132, seals the second gap g2, so that the water vapor in the environment cannot enter the counter plug 131 through the second gap g2 and enter the sensor body 11 along the inner cavity of the counter plug 131, further reduces the failure probability of the sensor assembly 10, improves the use stability and reliability of the sensor assembly 10, and further improves the use stability and reliability of the energy storage device.

[0081] Specifically, the insulating piece 14 is insulating cement. After the connecting piece 12 and the counter plug 131 are inserted and fitted, the operator can directly wrap the insulating cement on the inserted and fitted connecting piece 12 and counter plug 131 and extend the wrapping from the counter plug 131 to the signal line 132, so that the insulating cement covers the inserted and fitted connecting piece 12 and counter plug 131 and the connection between the counter plug 131 and the signal line 132. Then press the insulating cement to shape the insulating cement to be consistent with the contour of the connecting piece 12, the contour of the counter plug 131, the contour of the connection between the connecting piece 12 and the counter plug 131, and the contour of the connection between the counter plug 131 and the signal line 132, so as to completely wrap the connecting piece 12, the counter plug 131, the connection between the connecting piece 12 and the counter plug 131, and the connection between the counter plug 131 and the signal line 132, so that the insulating cement completely seals the first gap g1 and the second gap g2.

[0082] In this way, the first gap g1 between the connecting piece 12 and the counter plug 131 and the second gap g2 between the counter plug 131 and the signal line 132 are sealed by the insulating cement, the environmental water vapor is isolated, and the use stability and reliability of the sensor assembly 10 are improved.

[0083] In some embodiments of the present application, referring to Figure 3 , Figure 4 and Figure 5 , the sensor assembly 10 further comprises a mounting base 15, the sensor body 11 is detachably connected with the mounting base 15, and the connection between the sensor body 11 and the mounting base 15 has a third gap g3.

[0084] The insulating piece 14 also wraps the sensor body 11 in a shape matching the contour of the sensor body 11 and extends from the sensor body 11 to wrap at least part of the mounting base 15 to seal the third gap g3.

[0085] It should be noted that the sensor assembly 10 of the present application can be arranged at a corresponding pipeline of a liquid cooling unit, such as the sensor assembly 10 arranged at the water inlet pipeline or the water outlet pipeline of the circulating pump in the liquid cooling unit to detect the pressure of the cooling liquid at the corresponding pipeline.

[0086] The installation of the sensor body 11 is described by taking the water outlet pipe 20 of the circulating pump in the liquid cooling unit as an example. The outer wall of the water outlet pipe is provided with a connecting port, and the mounting base 15 is correspondingly installed at the connecting port by threaded connection, welding, clamping, insertion or the like. Of course, the mounting base 15 can also be integrally injection molded with the water outlet pipe. The inside of the mounting base 15 is formed with a liquid passage communicating with the connecting port.

[0087] The sensor body 11 is correspondingly detachably connected with the mounting base 15 by threaded connection, clamping, insertion or the like. For example, the mounting base 15 is formed with internal threads, and the sensor body 11 is formed with external threads matched with the internal threads, so that the sensor body 11 is threadedly connected with the mounting base 15. A liquid passage cavity is formed between the strain gauge inside the sensor body 11 and the connecting portion of the sensor body 11 with the mounting base 15. When the sensor body 11 is connected with the mounting base 15, the liquid passage cavity in the sensor body 11 communicates with the water outlet pipe through the liquid passage in the mounting base 15. In this way, part of the cooling liquid in the water outlet pipe can flow into the liquid passage cavity in the sensor body 11 through the liquid passage in the mounting base 15, so that the pressure of the cooling liquid directly acts on the strain gauge inside the sensor body 11, and the sensor assembly 10 as a whole realizes detection of the pressure of the cooling liquid.

[0088] Due to the assembly tolerance in the process of connecting the sensor body 11 with the mounting base 15, a connecting gap, i.e. the third gap g3, exists between the sensor body 11 and the mounting base 15. Environmental water vapor can pass through the third gap g3 and then enter the sensor body 11 and flow along the inner wall of the sensor body 11 to the position of the circuit board to contact the circuit board, causing condensed water to appear on the circuit board and making the sensor assembly 10 as a whole fail.

[0089] Based on this, the insulating piece 14 is wrapped around the sensor body 11 in a shape matched with the outer contour of the sensor body 11, and extends from the sensor body 11 to wrap at least part of the mounting base 15, so that the insulating piece 14 completely wraps the connecting portion between the sensor body 11 and the mounting base 15, seals the third gap g3, and makes the environmental water vapor not enter the sensor body 11 through the third gap g3, further reduces the failure probability of the sensor assembly 10, improves the use stability and reliability of the sensor assembly 10, and further improves the use stability and reliability of the energy storage device.

[0090] Specifically, the insulating member 14 is insulating mastic. After the sensor body 11 is connected to the mounting base 15, an operator can directly wrap the insulating mastic on the sensor body 11 and extend the wrapping from the sensor body 11 to the mounting base 15, so that the insulating mastic covers the connection between the sensor body 11 and the mounting base 15. Then, the insulating mastic is pressed to be shaped to be consistent with the contour of the sensor body 11, the contour of the connection between the sensor body 11 and the mounting base 15, and part of the contour of the mounting base 15, so as to completely wrap the sensor body 11 and the connection between the sensor body 11 and the mounting base 15, thereby completely sealing the third gap g3.

[0091] In this way, by sealing the third gap g3 between the sensor body 11 and the mounting base 15, the environmental moisture is isolated, and the use stability and reliability of the sensor assembly 10 are improved.

[0092] In some embodiments of the present application, the insulating member 14 is configured as an insulating mastic structure to be shaped into any shape.

[0093] Specifically, the insulating mastic can be made of silica mastic, epoxy resin mastic, phenolic resin mastic, etc. The insulating mastic can also be made of a material formed by mixing ethylene-propylene rubber, butyl rubber, and polyisobutylene through a special process. By applying extrusion force to the insulating mastic, the insulating mastic is shaped into a desired shape to adaptively wrap the corresponding parts on the sensor assembly 10. In this way, the insulating member 14 can adaptively wrap sensor assemblies 10 of various shape structures.

[0094] It should be noted that in some embodiments, when the sensor assembly 10 is installed at the corresponding pipeline of the liquid cooling unit 1, the mounting base 15, the sensor body 11, the connecting member 12, the plug-in member 131, and the signal line 132 are connected in sequence, and the mounting base 15, the sensor body 11, the connecting member 12, the plug-in member 131, and the signal line 132 are regular rotation body structures, the mounting base 15, the sensor body 11, the connecting member 12, the plug-in member 131, and the signal line 132 are coaxially distributed, and the plug-in member 131 and the signal line 132 are both cylindrical,

[0095] Based on this, referring to Figure 4When the insulating member 14 is insulating mastic, the initial shape of the insulating mastic is a long strip, and the length of the insulating mastic is greater than the continuous length between the center of the mounting base 15 and the center of the plug-in part 131. When the insulating mastic is wound into a ring and abuts against the mounting base 15, the insulating mastic as a whole is in a ring shape and keeps a vertical state, thereby accommodating the sensor body 11, the connecting part 12, the plug-in part 131, and part of the signal line 132. The distance between the upper end of the insulating mastic and the upper end surface of the plug-in part 131 at this time is represented by d1, and the radius of the plug-in part 131 is represented by r1. d1 and r1 satisfy: d1≥r1+20 (mm).

[0096] It can be understood that the distance between the upper end of the insulating mastic and the upper end surface of the plug-in part 131 at this time is the length of the part where the upper end of the insulating mastic protrudes from the plug-in part 131. The difference between this length and the radius of the plug-in part 131 is set to be greater than or equal to 20 mm, so that after the part where the upper end of the insulating mastic protrudes from the plug-in part 131 is extruded and shaped, the step surface between the plug-in part 131 and the signal line 132 can be fully filled and covered, so that the external environment cannot enter the inside of the sensor body 11 through the second gap g2 between the plug-in part 131 and the signal line 132.

[0097] Participation Figure 5 When the insulating mastic is shaped, the operator applies extrusion force to the insulating mastic, so that the insulating mastic tightly fits and wraps the sensor body 11, the connecting part 12, the plug-in part 131, and part of the signal line 132, and correspondingly fills the concave-convex structures such as the profile steps and gaps on the outer walls of the sensor body 11, the connecting part 12, and the plug-in part 131, and also correspondingly fills the step surfaces between the sensor body 11 and the mounting base 15 and between the plug-in part 131 and the signal line 132.

[0098] In this way, the first gap g1 between the connecting part 12 and the plug-in part 131, the second gap g2 between the plug-in part 131 and the signal line 132, and the third gap g3 between the sensor body 11 and the mounting base 15 are fully covered, so as to fully isolate the water vapor in the environment.

[0099] Further, referring to Figure 5 and Figure 6 , the sensor assembly 10 further comprises a protective tape 16, which is fixed to the outer periphery of the insulating member 14 in a ring shape to cover at least part of the insulating member 14.

[0100] Specifically, the protective tape 16 can be, but is not limited to, a release tape, a 3M tape, etc.

[0101] The protective tape 16 can fully wrap the outer periphery of the insulating member 14, or can partially wrap the outer periphery of the insulating member 14.

[0102] By winding the protective tape 16 at least one circle around the outer periphery of the insulating member 14, the insulating member 14 is shaped by the protective tape 16, so that the cement combination on the insulating member 14 is more compact and firm, the probability of the insulating member 14 loosening or falling off during the normal operation of the sensor assembly 10 is reduced, and the sealing effect of the insulating member 14 on the connecting gaps of the sensor assembly 10 is improved.

[0103] Further, the outer periphery contour of the insulating member 14 is shaped as a circular periphery, and the winding length of the protective tape 16 is greater than or equal to four-thirds of the circumference of the insulating member 14.

[0104] Based on the above description, it can be understood that when the insulating member 14 is insulating cement, the insulating member 14 can be shaped into any shape by external extrusion force.

[0105] After filling the insulating cement into the concave-convex structures on the outer wall of the sensor body 11, the concave-convex structures on the outer wall of the connecting member 12, and the concave-convex structures on the outer wall of the plug-in member 131 by external force extrusion, and shaping the outer periphery contour of the insulating cement as a regular circular periphery, the insulating cement is wrapped around the sensor body 11, the connecting member 12, the plug-in member 131, and part of the signal line 132, and the overall shape contour of the insulating cement, the sensor body 11, the connecting member 12, the plug-in member 131, and part of the signal line 132 is a cylinder.

[0106] At this time, the protective tape 16 can be wound on the circular periphery of the insulating cement. In this way, the protective tape 16 is conveniently wound and fixed on the insulating cement in a relatively simple manner. In addition, by making the winding length of the protective tape 16 greater than or equal to four-thirds of the circumference of the insulating member 14, the protective tape 16 is wound at least one circle around the outer periphery of the insulating member 14. In this way, the protective tape 16 shapes and limits the insulating member 14 along the circumferential direction of the insulating member 14, further making the cement combination on the insulating member 14 more compact and firm, reducing the probability of the insulating member 14 loosening or falling off during the normal operation of the sensor assembly 10, and improving the sealing effect of the insulating member 14 on the connecting gaps of the sensor assembly 10.

[0107] Further, the protective tape 16 is configured as a polyethylene copolymer structure.

[0108] Specifically, the protective tape 16 is a polyethylene copolymer adhesive tape.

[0109] The protective tape 16 is configured as a polyethylene copolymer structure, which utilizes the good weather resistance of polyethylene copolymer to make the protective tape 16 have better resistance in complex and harsh environmental conditions, improve the structural stability of the protective tape 16, and also directly improve the stability of the insulating member 14 wrapping the corresponding parts of the sensor assembly 10.

[0110] In some embodiments of the present application, referring to Figure 3 、 Figure 4 and Figure 5 , the insulating member 14 is configured as a heat-shrinkable sleeve structure, and the inner wall of the heat-shrinkable sleeve is attached with a hot melt adhesive layer that can be heated and melted to fill the first gap g1.

[0111] Specifically, when the insulating member 14 is a heat-shrinkable sleeve, the heat-shrinkable sleeve is pre-sleeved on the signal line 132 of the counter plug 131 during assembly, and after the counter plug 131 is inserted and fitted with the connecting member 12 on the sensor body 11 and the sensor body 11 is connected to the mounting base 15, the heat-shrinkable sleeve is pulled to the mounting base 15 to sleeve the mounting base 15, the sensor body 11, the connecting member 12, the counter plug 131 and part of the signal line 132.

[0112] Then, the heat-shrinkable sleeve is heated with high-temperature hot air, and the hot melt adhesive layer on the inner wall of the heat-shrinkable sleeve is melted at high temperature. The melted hot melt adhesive layer can fill the various concave-convex structures on the outer walls of the mounting base 15, the sensor body 11, the connecting member 12 and the counter plug 131, and can also fill the first gap g1 between the connecting member 12 and the counter plug 131, the second gap g2 between the counter plug 131 and the signal line 132, and the third gap g3 between the sensor body 11 and the mounting base 15. At the same time, the high-temperature hot air also causes the heat-shrinkable sleeve to shrink. The shrunk heat-shrinkable sleeve, in combination with the melted hot melt adhesive layer, causes the heat-shrinkable sleeve to be shaped as a shape matching the outer contour of the mounting base 15, the sensor body 11, the connecting member 12, the counter plug 131 and part of the signal line 132, so that the heat-shrinkable sleeve completely adheres and wraps the mounting base 15, the sensor body 11, the connecting member 12, the counter plug 131 and part of the signal line 132.

[0113] In this way, the first gap g1 between the connecting member 12 and the counter plug 131, the second gap g2 between the counter plug 131 and the signal line 132, and the third gap g3 between the sensor body 11 and the mounting base 15 are sealed.

[0114] Further, the heat-shrinkable sleeve is an irradiation cross-linked polyolefin heat-shrinkable sleeve.

[0115] The heat-shrinkable sleeve is configured as an irradiation cross-linked polyolefin heat-shrinkable sleeve, which has good wear resistance, insulation, corrosion resistance, solvent resistance and high flame resistance, so that the heat-shrinkable sleeve can maintain good structural stability during use, and also directly improves the stability of the heat-shrinkable sleeve wrapping the corresponding parts on the sensor assembly 10.

[0116] In addition, the present application also provides an energy storage system, which comprises the energy storage device described above.

[0117] Specifically, referring to Figure 7 , the energy storage system comprises a monitoring background 101, a system controller (Valve BaseController, VBC) 102, a plurality of energy storage sub-modules 103, a battery management controller (Battery Management Controller, BMC) 104 and a sub-module controller (Sub-Module Controller, SMC) 105 corresponding to each energy storage sub-module (Sub-Module, SM) 103, and the battery management controller 104 and the sub-module controller 105 are one-to-one communication connection; the monitoring background 101 is respectively connected with the system controller 102 and each battery management controller 104, and the system controller 102 is also respectively connected with each sub-module controller 105; the battery management controller 104 is used for acquiring the state information of the corresponding energy storage sub-module 103; the sub-module controller 105 is used for controlling the corresponding energy storage sub-module 103; the monitoring background 101 is used for state monitoring; the system controller 102 is used for acquiring the communication state of each communication path in the energy storage system, and performing corresponding processing actions according to the communication state.

[0118] In the embodiment of the application, the energy storage system comprises a plurality of energy storage sub-modules 103, each energy storage sub-module 103 can be composed of a plurality of electric cabinets in series and / or parallel, each electric cabinet can be composed of a plurality of electric boxes in series and / or parallel, and each electric box can be composed of a plurality of batteries in series and / or parallel, as shown in Figure 7 .

[0119] The energy storage system further comprises a battery management controller 104 corresponding to the energy storage sub-module 103, which can collect the state information of the corresponding energy storage sub-module 103, and is responsible for detecting the state, performance and health status of the battery, etc. The above-mentioned state information can include voltage, current, temperature, charging and discharging state, state of charge (State Of Charge, SOC), state of health (State of Health, SOH), etc.

[0120] The energy storage system further comprises a sub-module controller 105 in one-to-one communication connection with the battery management controller 104. The battery management controller 104 can transmit the collected state information to the sub-module controller 105, and the sub-module controller 105 can also transmit control instructions to the battery management controller 104, so as to control the corresponding energy storage sub-module 103. For example, the energy storage sub-module 103 is controlled to be put into or cut out of the energy storage system, and the energy storage sub-module 103 can also be controlled to charge, discharge, etc.

[0121] The energy storage system further comprises a system controller 102 and a monitoring background 101, the system controller 102 is in communication connection with the plurality of submodule controllers 105 and the monitoring background 101 respectively, and the monitoring background 101 is also in communication connection with the plurality of battery management controllers 104. The system controller 102 can acquire the state information collected by the battery management controller 104 through the submodule controller 105 and transmit the state information to the monitoring background 101. The system controller 102 can also acquire the state information collected by the battery management controller 104 through the monitoring background 101. The system controller 102 can send control instructions to the submodule controller 105 according to the state information, so as to control each energy storage submodule 103. The system controller 102 can determine the communication state of each communication path and take corresponding processing actions when communication failure occurs. The monitoring background 101 can monitor the state of the system controller 102 through communication with the system controller 102, and also can monitor the state of the battery management controller 104 through communication with the battery management controller 104. The monitoring background 101 is mainly used for monitoring the state, and in some embodiments, the monitoring background 101 and the system controller 102 can be integrated into one hardware device as two components.

[0122] It can be understood that, due to the configuration of the above-mentioned energy storage device, the energy storage system of the embodiment of the present application has good use stability and reliability of the sensor assembly 10 and the liquid cooling unit 1 on the energy storage device, and correspondingly improves the use stability and reliability of the energy storage system.

[0123] Referring to Figures 1 to 7 The embodiment of the present application provides an energy storage device and an energy storage system, and the energy storage system comprises the energy storage device.

[0124] The energy storage device comprises a battery device 2 and a liquid cooling unit 1 configured to provide cooling liquid for heat exchange with the battery device 2, and the liquid cooling unit 1 comprises a sensor assembly 10 for detecting the pressure of the cooling liquid. The sensor assembly 10 comprises a sensor body 11, a connecting piece 12 is formed on the sensor body 11; a wire harness assembly 13 having a counter plug 131 in plug-in cooperation with the connecting piece 12, the connecting piece 12 and the counter plug 131 have a first gap g1 at the plug-in position; and an insulating piece 14 configured as a plastic structure, which is wrapped around the connecting piece 12 and the counter plug 131 in a shape matching the outer contour of the connecting piece 12 and the counter plug 131 in plug-in cooperation, so as to seal the first gap g1.

[0125] The energy storage device of the embodiment of the present application is provided with the insulating piece 14 on the sensor assembly 10, and the insulating piece 14 is configured as a plastic structure, so that the insulating piece 14 can be shaped to match the shape of the plug-in connecting piece 12 and the counter plug 131. The insulating piece 14 can wrap the plug-in connecting piece 12 and the counter plug 131 according to the shape matching the plug-in connecting piece 12 and the counter plug 131, so as to isolate the plug-in connecting piece 12 and the counter plug from the ambient air through the insulating piece 14, realize the effect of completely sealing the first gap g1 between the connecting piece 12 and the counter plug, so that the water vapor in the environment cannot enter the inside of the sensor body 11 through the first gap g1 to form condensate on the circuit board in the sensor body 11, reduce the probability of abnormal output of the conditioning circuit on the circuit board, and further reduce the probability of failure of the sensor assembly 10, improve the use stability and reliability of the sensor assembly 10, and also enable the liquid cooling unit 1 to more accurately control the temperature of the battery device 2, thereby improving the use stability and reliability of the energy storage device.

[0126] The energy storage system of the embodiment of the present application has good use stability and reliability due to the configuration of the above-mentioned energy storage device, and correspondingly improves the use stability and reliability of the energy storage system.

[0127] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description simple, all possible combinations of the technical features in the above-mentioned embodiments are not described, but as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the present application.

[0128] The above-mentioned embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the patent scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. An energy storage device, characterized by, The energy storage device comprises: a battery device; a liquid cooling unit configured to provide a cooling liquid in heat exchange with the battery device, the liquid cooling unit comprising a sensor assembly configured to detect a pressure of the cooling liquid; wherein the sensor assembly comprises: a sensor body having a connector formed thereon; a wiring harness assembly having a counterpart connector plug mated with the connector, the connector and the counterpart connector plug having a first gap at a mating interface therebetween; an insulating member configured as a plastic structure, the insulating member being wrapped around the connector and the counterpart connector plug in a shape matching an outer profile of the connector and the counterpart connector plug to seal the first gap.

2. The energy storage device of claim 1, wherein, The wiring harness assembly further comprises a signal wire connected to the counterpart connector plug, the counterpart connector plug and the signal wire having a second gap at a connection interface therebetween, and the insulating member further extends from the counterpart connector plug to at least a portion of the signal wire to seal the second gap.

3. The energy storage device of claim 1, wherein: the sensor assembly further comprises a mounting base, the sensor body being detachably connected to the mounting base, and the sensor body and the mounting base having a third gap at a connection interface therebetween; the insulating member further wraps around the sensor body in a shape matching an outer profile of the sensor body, and extends from the sensor body to at least a portion of the mounting base to seal the third gap.

4. The energy storage device according to any one of claims 1 to 3, wherein The insulating member is configured as an insulating mastic structure.

5. The energy storage device of claim 4, wherein, The sensor assembly further comprises a protective tape wrapped around an outer periphery of the insulating member to cover at least a portion of the insulating member.

6. The energy storage device of claim 5, wherein, An outer periphery profile of the insulating member is shaped as a circumferential surface, and a wrapping length of the protective tape is greater than or equal to four-thirds of a circumference of the insulating member.

7. The energy storage device of claim 5, wherein, The protective tape is configured as a polyethylene copolymer structure.

8. The energy storage device according to any one of claims 1 to 3, wherein The insulating member is configured as a heat-shrinkable sleeve structure, and an inner wall of the heat-shrinkable sleeve has a hot-melt adhesive layer attached thereto, the hot-melt adhesive layer being capable of being heated and melted to fill the first gap.

9. The energy storage device of claim 8, wherein, The heat-shrinkable sleeve is an irradiation cross-linked polyolefin heat-shrinkable sleeve.

10. An energy storage system characterized by, The energy storage device comprises the energy storage device of any one of claims 1 to 9.

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