Energy storage devices and electrical equipment

Abstract

The present application relates to the field of energy storage technology and discloses an energy storage device and electrical equipment. The energy storage device includes a housing, a battery module, a mounting bracket, a fuse, and a thermally conductive layer. The housing includes an upper cover, a base, and an inspection cover. The upper cover and the base are connected and enclose a receiving cavity. One of the upper cover and the base has an end panel, and the end panel has a through inspection port. The inspection port is connected to the receiving cavity, and the inspection cover is configured to cover the inspection port. The battery module is located in the receiving cavity. The mounting bracket is located in the receiving cavity and is fixed to the base. The fuse is located in the receiving cavity and is assembled on the mounting bracket and is electrically connected to the battery module. At least a portion of the fuse is exposed at the inspection port. The thermally conductive layer is clamped between the fuse and the inspection cover.

Description

Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to an energy storage device and electrical equipment. Background Art

[0002] In recent years, with the rapid development of renewable energy generation, smart grids, and electric vehicles, energy storage devices have been widely used in large-scale energy storage systems due to their high energy density and long cycle life. However, as energy storage devices develop towards larger capacity and higher power, heat dissipation issues are becoming increasingly prominent, seriously affecting the safety, reliability, and service life of the systems. Summary of the Invention

[0003] Embodiments of the present application provide an energy storage device and an electrical device capable of improving the heat dissipation efficiency of the energy storage device.

[0004] The energy storage device of the embodiment of the present application includes:

[0005] The box body includes an upper cover, a base, and an inspection cover, wherein the upper cover and the base are connected to form a receiving cavity, and one of the upper cover and the base has an end panel, and the end panel has an inspection port extending therethrough, the inspection port is connected to the receiving cavity, and the inspection cover is configured to cover the inspection port;

[0006] A battery module is located in the accommodating cavity;

[0007] A mounting bracket is located in the accommodating cavity and is fixedly connected to the base;

[0008] a fuse located in the accommodating cavity, assembled on the mounting bracket, and electrically connected to the battery module, at least a portion of the fuse being exposed at the inspection port; and

[0009] A heat conductive layer is sandwiched between the fuse and the access cover.

[0010] In the embodiment of the present application, a heat-conducting layer is provided between the fuse and the access cover. Heat within the box and heat generated by the fuse itself can be quickly transferred to the access cover through the heat-conducting layer. The access cover effectively dissipates heat from the fuse based on the heat-conducting layer, thereby preventing the fuse from operating in a high-temperature state for a long time. This, in turn, prevents problems such as false fuse blowing and performance degradation, thereby extending the service life of the fuse and ensuring the reliability of the energy storage device. In addition, the access cover can cover or open the access port, facilitating fuse maintenance and improving fuse maintenance efficiency.

[0011] According to some embodiments of the present application, the inspection cover is detachably connected to the end panel.

[0012] In the embodiment of the present application, the inspection cover is detachably connected to the end panel outside the box, which makes it easy for the operator to disassemble and assemble the inspection cover outside the box, thereby improving the efficiency of disassembly and assembly of the inspection cover.

[0013] According to some embodiments of the present application, the inspection cover has a receiving space on a side facing the battery module, and a portion of the fuse extends out of the outer surface of the end panel through the inspection port and is accommodated in the receiving space.

[0014] In the embodiment of the present application, on the one hand, part of the fuse extends out from the outer surface of the end panel, which is more conducive to the heat dissipation of the fuse; on the other hand, the end panel of the battery pack in the related art is usually provided with high-voltage connectors, explosion-proof valves, liquid cooling joints and other components, which will occupy the space in the length direction of the battery pack, while the inspection cover of the embodiment of the present application has an accommodating space, and parts of some electrical functional parts including the fuse can be accommodated in the accommodating space through the inspection port, thereby improving the space utilization of the battery pack and thereby improving the energy storage density of the energy storage device.

[0015] According to some embodiments of the present application, a protrusion is provided on a surface of the inspection cover facing away from the battery module, and the accommodating space is recessed into the protrusion along the thickness direction of the inspection cover from the surface of the inspection cover facing the battery module.

[0016] In the embodiment of the present application, a thinner plate can be selected and the inspection cover can be processed through a stamping process so that one side of the inspection cover has a protrusion and the other side has an accommodation space. There is no need to design the thickness of the inspection cover to be thicker in order to design an accommodation space on one side of the inspection cover, thereby saving material costs.

[0017] According to some embodiments of the present application, the mounting bracket includes a mounting portion having a receiving groove, the notch of the receiving groove faces away from the receiving cavity, and the fuse is disposed in the receiving groove.

[0018] In the embodiment of the present application, the receiving groove can protect the fuse and prevent the fuse from being bumped when assembling other components.

[0019] According to some embodiments of the present application, the inspection cover has a accommodating space on the side facing the battery module, part of the mounting portion extends out of the outer surface of the end panel through the inspection port and is accommodated in the accommodating space, and the part of the mounting portion extending out of the outer surface of the end panel forms a notch of the accommodating groove.

[0020] In the embodiment of the present application, since part of the mounting portion is located on the outer surface of the end panel and is accommodated in the accommodating space, the space utilization of the battery pack is improved, thereby increasing the energy storage density of the energy storage device.

[0021] According to some embodiments of the present application, the energy storage device further includes a first locking member, which locks the fuse in the accommodating slot.

[0022] In the embodiment of the present application, the fuse and the mounting bracket are locked by a first locking member, which not only ensures the firmness of the connection between the fuse and the mounting bracket, but also facilitates the removal of the fuse from the mounting bracket, thereby improving the maintenance efficiency of the fuse.

[0023] According to some embodiments of the present application, a locking structure is convexly provided on the bottom surface of the accommodating groove, and the locking structure includes a wrapping portion and a second locking member embedded in the wrapping portion, and the first locking member is threadedly connected to the second locking member to lock the fuse to the mounting portion.

[0024] According to some implementations of the embodiments of the present application, the first locking member and the second locking member are made of metal material, and the mounting bracket and the wrapping portion are made of insulating material.

[0025] In an embodiment of the present application, the second locking part is embedded in the wrapping part, so that the first locking part and the second locking part can be made of metal material, ensuring the locking strength to ensure the locking stability of the fuse and the mounting part, and the mounting bracket and the wrapping part can be made of insulating material, which improves the electrical insulation of the mounting bracket.

[0026] According to some embodiments of the present application, the bottom surface of the receiving groove is provided with two locking structures, and the energy storage device includes two first locking members;

[0027] The fuse includes a fuse body and two wiring terminals located between the two locking structures, the heat conductive layer is clamped between the fuse body and the inspection cover, and the two wiring terminals are respectively provided on two opposite end surfaces of the fuse body;

[0028] The energy storage device also includes two conductive parts, which are electrically connected to the two wiring terminals respectively, and one of the conductive parts is electrically connected to the battery module. The two first locking parts are respectively threadedly connected to the two locking structures to lock the two corresponding groups of conductive parts and the wiring terminals.

[0029] In the embodiment of the present application, the two first locking parts not only lock the fuse on the mounting bracket, but also connect the fuse to the circuit of the battery module through two conductive parts. That is, the first locking parts not only play the role of mechanical connection, but also play the role of electrical connection. One component plays two roles at the same time, saving costs and helping to improve the efficiency of disassembly and assembly of the fuse.

[0030] According to some embodiments of the present application, the base includes a bottom plate, the battery module is assembled on the bottom plate, the groove side wall of the accommodating groove has a bottom side wall located between the bottom plate and the fuse, and the bottom side wall is concave inward toward the direction of the battery module to form two avoidance grooves, and the two conductive parts are respectively inserted into the two avoidance grooves.

[0031] In an embodiment of the present application, the bottom side wall is concave inward toward the battery module to form an avoidance groove, and the conductive part can pass through the avoidance groove from the side of the bottom side wall facing away from the fuse and extend into the accommodating groove, which can reduce the length of the conductive part and reduce material costs.

[0032] According to some embodiments of the present application, the conductive member has a bent portion, and the bent portion is located on a side of the bottom side wall facing away from the fuse.

[0033] In an embodiment of the present application, the bent portion of the conductive part is located on the side of the bottom side wall facing away from the fuse. Under the action of its own gravity, the bent portion will gradually move away from the bottom side wall, so that there is no compression contact between the conductive part and the wall of the accommodating groove, thereby avoiding damage to the insulating film on the outside of the conductive part due to continuous friction between the conductive part and the wall of the accommodating groove, thereby reducing the risk of short circuit in the conductive part.

[0034] According to some embodiments of the present application, a reinforcement structure is further provided around each of the locking structures, and the reinforcement structure is connected between the locking structure and the slot wall of the accommodating slot.

[0035] In the embodiment of the present application, a reinforcing structure is connected around the locking structure, which improves the structural strength of the locking structure, thereby improving the torsional strength of the locking structure when the first locking member is locked with the locking structure, and improving the stability of the fuse assembly in the accommodating slot.

[0036] According to some embodiments of the present application, the reinforcement structure includes a first rib and a second rib connected between the locking structure and the wall of the accommodating groove, the first rib extending along the height direction of the battery module, the second rib extending along the width direction of the battery module, the first rib having a first limiting portion, and the second rib having a second limiting portion;

[0037] The two first limiting portions are respectively located on the same side of the two connecting terminals, and the two second limiting portions are respectively located on two sides of the two connecting terminals that are opposite to each other along the width direction of the battery module.

[0038] In an embodiment of the present application, the two first limiting parts can limit the two terminal blocks of the fuse in the height direction of the battery module, and the two second limiting parts can limit the two terminal blocks of the fuse in the width direction of the battery module, thereby achieving rapid alignment of the two terminal blocks of the fuse with the two locking structures, thereby improving the assembly efficiency of the fuse.

[0039] According to some embodiments of the present application, the base includes a bottom plate, and the slot sidewall of the accommodating slot has a bottom sidewall located between the bottom plate and the fuse.

[0040] In the embodiment of the present application, since the bottom side wall is located between the bottom plate and the fuse, when assembling the fuse and the mounting bracket, the bottom side wall can support and position the fuse, making it convenient for the first locking member to lock the fuse on the mounting bracket.

[0041] According to some embodiments of the present application, the fuse includes a fuse body, and the heat-conductive layer is clamped between the fuse body and the inspection cover; the bottom side wall has a first protrusion, and the first protrusion extends from the side surface of the fuse body facing away from the battery module; the groove side wall of the accommodating groove also has a top side wall arranged opposite to the bottom side wall along the height direction of the battery module, and the top side wall has a second protrusion, and the second protrusion extends from the side surface of the fuse body facing away from the battery module; at least a portion of the heat-conductive layer is confined between the first protrusion and the second protrusion.

[0042] In the embodiment of the present application, the first extension portion and the second extension portion both extend from the surface of the fuse body facing away from the battery module. When the thermal conductive layer needs to be pre-bonded to the fuse body, the space between the first extension portion and the second extension portion can be used to install and position the thermal conductive layer to prevent the thermal conductive layer from moving relative to the fuse body in the arrangement direction of the first extension portion and the second extension portion.

[0043] According to some embodiments of the present application, the mounting bracket is made of insulating material.

[0044] The electrical equipment of the embodiment of the present application includes the energy storage device described in any one of the above items, and the energy storage device is used to supply power to the electrical equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The accompanying drawings are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the specification, are used to explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present disclosure, and those skilled in the art can derive other drawings based on these drawings without inventive effort.

[0046] Figure 1 This is a schematic diagram of an energy storage system.

[0047] Figure 2 It is a schematic diagram of an exploded view of the energy storage device according to an embodiment of the present application.

[0048] Figure 3 It is an exploded schematic diagram of the fuse, mounting bracket, inspection cover, and end panel of an embodiment of the present application.

[0049] Figure 4 This is a schematic diagram of the assembled fuse, mounting bracket, and conductive member of an embodiment of the present application.

[0050] Figure 5 It is an exploded schematic diagram of the fuse, mounting bracket, conductive member, and heat-conducting layer of an embodiment of the present application.

[0051] Figure 6 It is a schematic diagram of the fuse and the mounting bracket after being assembled in an embodiment of the present application from one viewing angle.

[0052] Figure 7 This is a schematic diagram of the fuse and the mounting bracket after being assembled in an embodiment of the present application from another perspective.

[0053] Figure 8 This is a schematic diagram from another perspective after the fuse and the mounting bracket are assembled according to an embodiment of the present application.

[0054] Figure 9 This is a schematic diagram of the locking structure and reinforcement structure of an embodiment of the present application provided with a mounting bracket in a receiving groove.

[0055] Figure 10 It is a schematic diagram of an electrical device.

[0056] The description of the accompanying drawings is as follows:

[0057] 100, box body; 101, accommodating cavity; 110, upper cover; 120, base; 121, end panel; 1211, inspection port; 122, bottom plate; 130, inspection cover; 131, accommodating space; 132, protrusion;

[0058] 200, battery module; 220, single cell;

[0059] 300, wiring harness sampling assembly;

[0060] 500, first locking member;

[0061] 600, mounting bracket; 610, connecting portion; 620, mounting portion; 621, receiving groove; 622, locking structure; 6221, wrapping portion; 6222, second locking member; 623, avoidance groove; 624, bottom sidewall; 6241, first extension portion; 625, top sidewall; 6251, second extension portion; 626, end sidewall; 630, reinforcement structure; 631, first rib; 6311, first limiting portion; 632, second rib; 6321, second limiting portion;

[0062] 700, fuse; 710, fuse body; 720, terminal; 721, first through-hole;

[0063] 800, thermal conductive layer;

[0064] 910, conductive element; 911, second through-hole; 912, bending portion. DETAILED DESCRIPTION

[0065] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art. Like reference numerals in the figures represent like or similar structures, and thus their detailed description will be omitted.

[0066] It is understood that the terms "including" and "having" and any variations thereof in the embodiments of the present application are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or components inherent to the process, method, product, or apparatus.

[0067] Since the energy people need is highly temporal and spatial, in order to make rational use of energy and improve energy utilization, it is necessary to use a medium or device to store one form of energy in the same form or convert it into another form of energy, and then release it in a specific form of energy based on future application needs.

[0068] Currently, the generation of green electricity generally relies on photovoltaics, wind power, and hydropower. However, wind and solar energy are generally intermittent and highly volatile, which can cause grid instability, insufficient electricity during peak hours, and excessive electricity during off-peak hours. Unstable voltage can also damage electricity. Therefore, insufficient electricity demand or insufficient grid capacity may lead to the problem of "wind and solar power curtailment". To solve these problems, we must rely on energy storage. This means converting electrical energy into other forms of energy through physical or chemical means and storing them. When needed, this energy is converted into electrical energy and released. Simply put, energy storage is like a large "power bank", storing electricity when photovoltaic and wind energy are sufficient and releasing the stored electricity when needed.

[0069] Taking electrochemical energy storage as an example, this solution provides an energy storage device for use in energy storage systems. The energy storage device is equipped with a group of chemical batteries, which mainly use the chemical elements in the batteries as energy storage media. The charging and discharging process is accompanied by chemical reactions or changes in the energy storage medium. Simply put, the electricity generated by wind and solar energy is stored in the chemical battery. When the use of external electricity reaches its peak, the stored electricity is released for use, or transferred to places where electricity is scarce for use.

[0070] Currently, energy storage (i.e., energy storage) has a wide range of application scenarios, including power generation side energy storage, grid side energy storage, and power consumption side energy storage. The corresponding types of energy storage devices include:

[0071] (1) Large-scale energy storage power stations applied to wind power and photovoltaic power stations can help renewable energy generation meet grid connection requirements and improve the utilization rate of renewable energy. As a high-quality active / reactive power supply on the power supply side, energy storage power stations can achieve load matching of electricity in time and space, enhance the capacity to absorb renewable energy, reduce instantaneous power changes, reduce the impact on the power grid, improve the absorption of new energy generation, and are of great significance in grid system backup, alleviating peak load power supply pressure, and peak and frequency regulation.

[0072] (2) Energy storage containers used on the grid side are mainly used for peak shaving, frequency regulation, and relief of grid congestion. They can realize peak shaving and valley filling of electricity load, that is, charging the energy storage battery when the electricity load is low and releasing the stored electricity during the peak period, thereby achieving a balance between electricity production and consumption;

[0073] (3) Small energy storage cabinets used on the power consumption side, whose main functions are self-generation and self-use of electricity, peak-valley price arbitrage, capacity cost management, and improving power supply reliability. According to different application scenarios, energy storage on the power consumption side can be divided into industrial and commercial energy storage cabinets, household energy storage devices, energy storage charging piles, etc., which are generally used in conjunction with distributed photovoltaics. Industrial and commercial users can use energy storage for peak-valley price arbitrage and capacity cost management. In the power market that implements peak-valley electricity prices, by charging the energy storage system when the electricity price is low and discharging the energy storage system when the electricity price is high, peak-valley electricity price arbitrage is achieved, reducing electricity costs. In addition, industrial enterprises that are subject to a two-part electricity price system can use the energy storage system to store energy during low electricity consumption and discharge it during peak load, thereby reducing peak power and the maximum demand reported, and achieving the purpose of reducing capacity electricity charges. Household photovoltaic storage can improve the level of self-generation and self-use of electricity. Due to high electricity prices and poor power supply stability, the demand for household photovoltaic installation is driven. Considering that photovoltaic power generation occurs during the day, while user loads are generally higher at night, deploying energy storage can better utilize photovoltaic power, increasing self-generation and self-consumption while reducing electricity costs. Furthermore, energy storage is required for backup power in areas such as communication base stations and data centers.

[0074] In some embodiments, see Figure 1 , Figure 1 is a structural diagram of an energy storage system according to an embodiment of the present application, and Figure 1 The shared energy storage scenario on the power generation / distribution side is used as an example for illustration. The energy storage device of this application is not limited to the energy storage scenario on the power generation / distribution side.

[0075] The present application provides an energy storage system, which includes: a high-voltage cable 2, a first electric energy conversion device 3, a second electric energy conversion device 4 and an energy storage device 1 provided by the present application. In some embodiments of the power generation side scenario, the second electric energy conversion device 4 can be a wind power conversion device. Since the electric energy generated by wind power conversion is volatile, random and intermittent, the unstable electric energy output by the wind power conversion device can be stored in the energy storage device 1 by connecting to the grid. The energy storage device 1 is connected to the high-voltage cable 2 and outputs smooth electric energy to the power distribution network for use, thereby realizing peak and frequency regulation and stable operation of the power grid; or, the wind power conversion device is always connected to the grid. The high-voltage cable 2 is connected. Under normal power generation conditions, the electric energy output by the wind power conversion device is supplied to the power consumption side of the distribution network through the high-voltage cable. When the current power load is low and the wind power conversion device generates excess power, the excess power is first stored in the energy storage device 1, reducing the wind and solar power abandonment rates and improving the problem of new energy power generation and consumption. When the power load is high, the power grid issues a command to transmit the power stored in the energy storage device 1 in conjunction with the high-voltage cable 2 in a grid-connected mode to the power consumption side, providing peak-shaving, frequency regulation, standby and other services for the power grid operation, giving full play to the peak-shaving role of the power grid, promoting peak-shaving and valley-filling of the power grid, and alleviating the power supply pressure of the power grid.

[0076] In some embodiments on the distribution network side, the first power conversion device 3 can be a photovoltaic power conversion device, and the energy storage device 1 is connected to the high-voltage cable 2 and installed between the downstream of the high-voltage cable 2 and the user load. The electric energy output by the photovoltaic power conversion device is stored in the energy storage device 1, which responds promptly to act as a backup power supply when a fault occurs in the power grid / distribution network; or, it can alleviate line congestion when a line congestion occurs in the high-voltage cable 2 transmission line, and provide power supply support when the power grid is planned to be expanded to delay the economic pressure caused by the expansion of the power grid / distribution network.

[0077] Optionally, the first electric energy conversion device 3 may include but is not limited to a wind power conversion device, and the second electric energy conversion device 4 may include but is not limited to a photovoltaic power conversion device. The first electric energy conversion device 3 and the second electric energy conversion device 4 can convert at least one of solar energy, light energy, wind energy, thermal energy, tidal energy, biomass energy and mechanical energy into electric energy.

[0078] Optionally, the energy storage device 1 may include but is not limited to energy storage application scenarios such as energy storage power stations, hydropower / thermal / wind power generation systems, solar power generation systems, mobile power systems, smart home systems or temporary power supply systems, and is also used in data centers, military equipment, aerospace, charging piles, electric vehicles and other fields.

[0079] Optionally, the energy storage device 1 may include, but is not limited to, a battery pack, a battery cluster, a mobile power supply, an energy storage cabinet / container, and other battery integrated systems. The energy storage device 1 provided in the embodiments of this application may be applied in practical applications such as, but not limited to, the products listed above. Other application forms are also possible, and the embodiments of this application do not impose strict restrictions on the application form of the energy storage device 1.

[0080] like Figure 2 As shown, the battery pack includes a housing 100, a battery module 200, and a wiring harness sampling assembly 300. The housing 100 includes a top cover 110 and a base 120. The top cover 110 and the base 120 are connected to form a receiving cavity 101. The battery module 200 and the wiring harness sampling assembly 300 are disposed within the receiving cavity 101. The battery module 200 is fixedly connected to the base 120. The wiring harness sampling assembly 300 is located on one side of the battery module 200 and is used to collect the voltage and / or temperature of the single cells in the battery module 200.

[0081] In one embodiment, the wiring harness sampling assembly 300 is a CCS (Cell Connection System, integrated busbar).

[0082] It is understood that there may be one or more battery modules 200 and one or more wiring harness sampling components 300. The number of battery modules 200 and the number of wiring harness sampling components 300 may be the same or different.

[0083] For example, Figure 2 As shown, the number of battery modules 200 and the number of wiring harness sampling components 300 are both four. The four battery modules 200 are arranged in an array, and the four wiring harness sampling components 300 are respectively located on one side of the four battery modules 200.

[0084] Of course, in other embodiments, the number of wire harness sampling assemblies 300 may be less than the number of battery modules 200. For example, there are two wire harness sampling assemblies 300 and four battery modules 200, and one wire harness sampling assembly 300 corresponds to two battery modules 200.

[0085] Each battery module 200 includes multiple battery cells 220 arranged side by side. These cells 220 can be connected in series, parallel, or in a hybrid configuration, where hybrid refers to a combination of series and parallel connections. The wiring harness sampling assembly 300 is capable of collecting the voltage and / or temperature of the battery cells 220.

[0086] When there are multiple battery modules 200 , the multiple battery modules 200 may also be connected in series, in parallel, or in a mixed manner.

[0087] Optionally, the single battery 220 may be, but is not limited to, at least one of a cylindrical battery, a square battery, a prismatic battery, or batteries of other shapes.

[0088] Optionally, the single cell 220 may be a secondary battery. A secondary battery refers to a single cell 220 that can be continuously used by activating active materials by charging after the single cell 220 is discharged.

[0089] The single battery 220 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 metal hydride battery, a nickel cadmium battery, a lead storage battery, etc.

[0090] Please continue reading Figure 2 One of the upper cover 110 and the base 120 has an end panel 121 , and the end panel 121 can be disposed at one end of the battery module 200 in the longitudinal direction.

[0091] In the embodiment of the present application, the base 120 includes a bottom plate 122 and two end panels 121. The battery module 200 is disposed on the bottom plate 122. The two end panels 121 are respectively connected to the ends of the bottom plate 122 along the length of the battery module 200. Of course, in other embodiments, the end panels 121 can also be disposed on the upper cover 110.

[0092] To improve battery pack safety, battery packs in related art are often equipped with fuses. When a short circuit occurs inside or outside the battery pack, the current flowing through the fuse surges instantly, causing the fuse to blow instantly, severing the fault circuit and preventing catastrophic consequences.

[0093] The inventors of this application discovered during their research that when the battery pack is operating normally, heat is likely to accumulate in the space inside the battery pack, causing the fuse to operate at a high temperature for a long time. This can cause the fuse to be prone to false blowing, performance degradation, shortened life, and other adverse conditions, thereby reducing the reliability of the energy storage device.

[0094] Based on this, the embodiment of the present application significantly improves the working reliability of the energy storage device by improving the heat dissipation efficiency of the fuse 700. Figure 3 As shown, the box body 100 further includes an inspection cover 130 , and the end panel 121 has a through inspection port 1211 , which is in communication with the accommodating chamber 101 . The inspection cover 130 is configured to cover the inspection port 1211 .

[0095] Energy storage device 1 also includes a fuse 700, a mounting bracket 600, and a thermally conductive layer 800. Mounting bracket 600 is located within accommodating cavity 101 and fixedly connected to base 120. Fuse 700 is located within accommodating cavity 101, assembled on mounting bracket 600, and electrically connected to battery module 200. At least a portion of fuse 700 is exposed at access opening 1211. Thermally conductive layer 800 is sandwiched between fuse 700 and access cover 130.

[0096] In the embodiment of the present application, a heat-conducting layer 800 is provided between the fuse 700 and the inspection cover 130. The heat within the box 100 and the heat generated by the fuse 700 itself can be quickly transferred to the inspection cover 130 through the heat-conducting layer 800. Based on the heat-conducting layer 800, the inspection cover 130 can effectively dissipate heat from the fuse 700, thereby preventing the fuse 700 from operating in a high-temperature state for a long time. This further prevents the fuse 700 from experiencing problems such as false melting and performance degradation, thereby extending the service life of the fuse 700 and ensuring the reliability of the energy storage device. In addition, the inspection cover 130 can cover or open the inspection port 1211, facilitating maintenance of the fuse 700, thereby improving the maintenance efficiency of the fuse 700.

[0097] In one embodiment, one side of the thermal conductive layer 800 in the thickness direction is bonded to one of the fuse 700 and the access cover 130 , and the other side of the thermal conductive layer 800 in the thickness direction is attached to the other of the fuse 700 and the access cover 130 .

[0098] For example, the thermal conductive layer 800 can be pre-bonded to the surface of the fuse 700 facing away from the battery module 200 by adhesive, and then fixed based on the connection between the inspection cover 130 and the end panel 121 to achieve the thermal conductive layer 800 being clamped between the fuse 700 and the inspection cover 130.

[0099] Alternatively, the heat conductive layer 800 may be pre-bonded to the inner surface of the inspection cover 130 by adhesive or the like, and then fixed to the inspection cover 130 and the end panel 121 so as to clamp the heat conductive layer 800 between the fuse 700 and the inspection cover 130 .

[0100] Of course, the heat conductive layer 800 may not be pre-bonded to the fuse 700 or the access cover 130 , but may be directly fixed between the fuse 700 and the access cover 130 based on the connection between the access cover 130 and the end panel 121 .

[0101] It is understandable that the adhesive used when pre-fixing the thermally conductive layer 800 may be thermally conductive silicone, etc., to ensure better heat transfer efficiency between the fuse 700 and the access cover 130, while ensuring the insulation performance between the fuse 700 and the access cover 130, thereby ensuring the electrical safety of the energy storage device; of course, the adhesive used when pre-fixing the thermally conductive layer 800 may also be conventional thermally conductive glue. In this case, the inner surface of the access cover 130 is provided with an insulating film layer (or insulating coating) to ensure electrical insulation between the fuse 700 and the access cover 130, thereby ensuring the electrical safety of the energy storage device.

[0102] like Figure 3 As shown, the energy storage device 1 further includes two conductive members 910, one end of each of which is electrically connected to the fuse 700. The other end of one conductive member 910 is electrically connected to the battery module 200, and the other end of the other conductive member 910 is electrically connected to the total positive output terminal 920 or the total negative output terminal 930 of the battery pack. In other words, the fuse 700 is connected in series in the output circuit of the battery module 200 via the two conductive members 910.

[0103] like Figure 3 As shown, the inspection cover 130 is detachably connected to the end panel 121 outside the housing 100 .

[0104] In the embodiment of the present application, the inspection cover 130 is detachably connected to the end panel 121 outside the box body 100, which facilitates the operator to disassemble and assemble the inspection cover 130 outside the box body 100, thereby improving the disassembly and assembly efficiency of the inspection cover 130.

[0105] Of course, in other embodiments, the inspection cover 130 may also be designed to be movably connected to the end plate surface, for example, rotatable, slidable, etc., as long as it can cover the inspection opening 1211.

[0106] Further, when the inspection cover 130 is detachably connected to the end panel 121 , the inspection cover 130 is connected to the end panel 121 by bolts.

[0107] In the embodiment of the present application, the inspection cover 130 is connected to the end panel 121 by bolts. On the one hand, the bolts allow repeated disassembly and assembly, which facilitates maintenance without destroying the connection structure; on the other hand, after the bolts are tightened, they can provide a stable clamping force, which, when used in conjunction with a sealing gasket, significantly improves the sealing performance of the inspection cover 130 in blocking the inspection port 1211.

[0108] In one embodiment, if Figure 3 As shown, the side of the inspection cover 130 facing the battery module 200 has a receiving space 131. A portion of the fuse 700 extends out of the outer surface of the end panel 121 through the inspection opening 1211 and is accommodated in the receiving space 131. The outer surface of the end panel 121 refers to the surface of the end panel 121 that faces away from the receiving cavity 101.

[0109] On the one hand, part of the fuse 700 extends out from the outer surface of the end panel 121, which is more conducive to the heat dissipation of the fuse 700; on the other hand, the end panel of the battery pack in the related art is usually provided with high-voltage connectors, explosion-proof valves, liquid cooling connectors and other components, which will occupy the space in the length direction of the battery pack, while the inspection cover 130 of the embodiment of the present application has an accommodating space 131, and parts of some electrical functional parts including the fuse 700 can be accommodated in the accommodating space 131 through the inspection port 1211, thereby improving the space utilization of the battery pack and thereby improving the energy storage density of the energy storage device.

[0110] like Figure 2 and Figure 3 As shown, a protrusion 132 is provided on the surface of the inspection cover 130 facing away from the battery module 200 , and the accommodating space 131 is recessed into the protrusion 132 along the thickness direction of the inspection cover 130 from the surface of the inspection cover 130 facing the battery module 200 .

[0111] In the embodiment of the present application, a thinner plate can be selected and the inspection cover 130 can be processed through a stamping process so that one side of the inspection cover 130 has a protrusion 132 and the other side has a receiving space 131. There is no need to design the thickness of the inspection cover 130 to be thicker in order to design the receiving space 131 on one side of the inspection cover 130, thereby saving material costs.

[0112] In one embodiment, the mounting bracket 600 is made of insulating material, thereby improving the electrical safety of the energy storage device.

[0113] like Figure 4 and Figure 5As shown, the mounting bracket 600 includes a connecting portion 610 and a mounting portion 620. The connecting portion 610 is fixedly assembled to the bottom plate 122 of the base 120. Furthermore, the connecting portion 610 is bolted to the crossbeam of the base 120. The mounting portion 620 is connected to the connecting portion 610 and has a receiving slot 621. The notch of the receiving slot 621 faces away from the receiving cavity 101. The fuse 700 is fixedly mounted in the receiving slot 621.

[0114] In the embodiment of the present application, the receiving groove 621 can protect the fuse 700 and prevent the fuse 700 from being bumped when assembling other components.

[0115] Furthermore, a portion of the mounting portion 620 extends out of the outer surface of the end panel 121 through the inspection opening 1211 and is accommodated in the accommodating space 131 . The portion of the mounting portion 620 extending out of the outer surface of the end panel 121 forms a notch of the accommodating groove 621 .

[0116] In the embodiment of the present application, since part of the mounting portion 620 is located on the outer surface of the end panel 121 and is accommodated in the accommodating space 131 , the space utilization of the battery pack is improved, thereby increasing the energy storage density of the energy storage device.

[0117] Please continue reading Figure 4 and Figure 5 The energy storage device 1 further includes a first locking member 500 , which locks the fuse 700 in the receiving groove 621 .

[0118] Here, "locking" refers to the use of fasteners to achieve detachable connection between components, for example, fasteners are not limited to bolts.

[0119] In the embodiment of the present application, the fuse 700 and the mounting bracket 600 are locked by the first locking member 500, which not only ensures the firmness of the connection between the fuse 700 and the mounting bracket 600, but also facilitates the removal of the fuse 700 from the mounting bracket 600, thereby improving the maintenance efficiency of the fuse 700.

[0120] Furthermore, a locking structure 622 is protruding from the bottom surface of the accommodating groove 621, and the locking structure 622 includes a wrapping portion 6221 and a second locking member 6222 embedded in the wrapping portion 6221. The first locking member 500 is threadedly connected to the second locking member 6222 to lock the fuse 700 to the mounting portion 620; the first locking member 500 and the second locking member 6222 are made of metal material, and the mounting bracket 600 and the wrapping portion 6221 are made of insulating material.

[0121] In an embodiment of the present application, the second locking member 6222 is embedded in the wrapping portion 6221, so that the first locking member 500 and the second locking member 6222 can both be made of metal materials, ensuring the locking strength to ensure the locking stability of the fuse 700 and the mounting portion 620; and the mounting bracket 600 and the wrapping portion 6221 can be made of insulating materials, thereby improving the electrical insulation of the mounting bracket 600.

[0122] The locking structure 622 and the mounting bracket 600 can be formed by an in-mold injection molding process. For example, the second locking member 6222 is a metal insert, and the mounting bracket 600 and the locking structure 622 are integrally molded by an injection molding process.

[0123] Of course, it can also be processed by press-fitting. For example, the wrapping portion 6221 and the mounting bracket 600 are formed by injection molding, and then the second locking member 6222 is pressed into the wrapping portion 6221.

[0124] In one embodiment, one of the first locking component 500 and the second locking component 6222 is a screw, and the other is a nut.

[0125] like Figure 4 and Figure 5 As shown, the first locking component 500 is a screw, and the second locking component 6222 is a nut; of course, in another embodiment, the first locking component 500 is a nut, and the second locking component 6222 is a screw.

[0126] like Figure 4 and Figure 5 As shown, two locking structures 622 are protruding from the bottom surface of the receiving groove 621 . There are two first locking members 500 , and the two first locking members 500 can be locked with the two locking structures 622 respectively.

[0127] The fuse 700 includes a fuse body 710 and two terminals 720 positioned between two locking structures 622. A thermally conductive layer 800 is sandwiched between the fuse body 710 and the access cover 130. The two terminals 720 are located on opposite ends of the fuse body 710. One end of each of the two conductive members 910 is electrically connected to the two terminals 720, respectively. Two first locking members 500 are threadedly connected to the two locking structures 622, respectively, to secure the two corresponding sets of conductive members 910 and terminals 720.

[0128] In the embodiment of the present application, the two first locking members 500 not only lock the fuse 700 on the mounting bracket 600, but also connect the fuse 700 to the circuit of the battery module 200 through the two conductive members 910. That is, the first locking members 500 not only play the role of mechanical connection, but also play the role of electrical connection. One component plays two roles at the same time, saving costs and helping to improve the efficiency of disassembly and assembly of the fuse 700.

[0129] In one embodiment, the terminal block 720 has a first through-hole 721 extending therethrough, and the conductive member 910 corresponding to the terminal block 720 has a second through-hole 911 extending therethrough. The first locking member 500 passes through the first through-hole 721 and the second through-hole 911 and is locked with the second locking member 6222 of the locking structure 622.

[0130] Of course, the installation method of the fuse 700 and the mounting bracket 600 is not limited to this. For example, in other embodiments, the first locking member 500 is only used to lock the fuse 700 to the mounting bracket 600, while the electrical connection between the conductive member 910 and the terminal block 720 is completed by other components.

[0131] like Figure 4 and Figure 5 As shown, the sidewalls of the receiving groove 621 include a bottom sidewall 624, a top sidewall 625, and two end sidewalls 626. The bottom sidewall 624 and the top sidewall 625 are arranged opposite to each other along the height direction of the battery module 200, and the two end sidewalls 626 are arranged opposite to each other along the width direction of the battery module 200. The bottom sidewall 624 is located between the bottom plate 122 and the fuse 700.

[0132] In the embodiment of the present application, since the bottom side wall 624 is located between the bottom plate 122 and the fuse 700, when the fuse 700 and the mounting bracket 600 are assembled, the bottom side wall 624 can support and position the fuse 700, making it convenient for the first locking member 500 to lock the fuse 700 on the mounting bracket 600.

[0133] In one embodiment, if Figure 4 As shown, the bottom side wall 624 is concave inwardly toward the battery module 200 to form two avoidance grooves 623 , and the two conductive members 910 are respectively disposed in the two avoidance grooves 623 .

[0134] In an embodiment of the present application, the bottom side wall 624 is concave inward toward the battery module 200 to form an avoidance groove 623. The conductive member 910 can pass through the avoidance groove 623 from the side of the bottom side wall 624 facing away from the fuse 700 and extend into the accommodating groove 621. This can reduce the length of the conductive member 910 and reduce material costs.

[0135] like Figure 4As shown, the conductive member 910 has a bent portion 912 . The bent portion 912 is located on a side of the bottom sidewall 624 facing away from the fuse 700 .

[0136] In an embodiment of the present application, the bent portion 912 of the conductive member 910 is located on the side of the bottom side wall 624 facing away from the fuse 700. Under the action of its own gravity, the bent portion 912 will gradually move away from the bottom side wall 624, so that there is no squeeze contact between the conductive member 910 and the groove wall of the accommodating groove 621, thereby avoiding damage to the insulating film outside the conductive member 910 due to continuous friction between the conductive member 910 and the groove wall of the accommodating groove 621, thereby reducing the risk of short circuit of the conductive member 910.

[0137] like Figure 6 and Figure 7 As shown, the bottom side wall 624 has a first protrusion 6241, which extends from the side surface of the fuse body 710 facing away from the battery module 200; the top side wall 625 has a second protrusion 6251, which extends from the side surface of the fuse body 710 facing away from the battery module 200; at least a portion of the thermal conductive layer 800 is limited between the first protrusion 6241 and the second protrusion 6251.

[0138] In the embodiment of the present application, the first extension portion 6241 and the second extension portion 6251 both extend from the surface of the fuse body 710 facing away from the battery module 200. When it is necessary to pre-bond the thermal conductive layer 800 to the fuse body 710, the space between the first extension portion 6241 and the second extension portion 6251 can be used to install and position the thermal conductive layer 800, preventing the thermal conductive layer 800 from moving relative to the fuse body 710 in the arrangement direction of the first extension portion 6241 and the second extension portion 6251.

[0139] like Figure 8 and Figure 9 As shown, a reinforcement structure 630 is further provided around each locking structure 622 , and the reinforcement structure 630 is connected between the locking structure 622 and the slot wall of the accommodating slot 621 .

[0140] In the embodiment of the present application, a reinforcing structure 630 is connected around the locking structure 622, which improves the structural strength of the locking structure 622, thereby improving the torsional strength of the locking structure 622 when the first locking member 500 is locked with the locking structure 622, and improving the stability of the fuse 700 assembled in the accommodating groove 621.

[0141] Furthermore, the reinforcing structure 630 includes a first rib 631 and a second rib 632 connected between the locking structure 622 and the groove wall of the accommodating groove 621, the first rib 631 extends along the height direction of the battery module 200, and the second rib 632 extends along the width direction of the battery module 200, the first rib 631 has a first limiting portion 6311, and the second rib 632 has a second limiting portion 6321; wherein, the two first limiting portions 6311 are respectively located on the same side of the two connecting terminals 720, and the two second limiting portions 6321 are respectively located on the two sides of the two connecting terminals 720 opposite to each other along the width direction of the battery module 200.

[0142] In an embodiment of the present application, the two first limiting portions 6311 can limit the two terminal blocks 720 of the fuse 700 in the height direction of the battery module 200, and the two second limiting portions 6321 can limit the two terminal blocks 720 of the fuse 700 in the width direction of the battery module 200, thereby achieving rapid alignment of the two terminal blocks 720 of the fuse 700 with the two locking structures 622, thereby improving the assembly efficiency of the fuse 700.

[0143] like Figure 10 As shown, the present application also provides an electrical device 5 , comprising the energy storage device 1 of any of the above embodiments, and the energy storage device 1 is used to supply power to the electrical device 5 .

[0144] It is understandable that the various embodiments / implementations provided in this application can be combined with each other without causing any contradiction, and they will not be illustrated one by one here.

[0145] In the application examples, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise expressly defined. Terms such as "installed", "connected", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; "connected" can mean a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the application examples can be understood according to the specific circumstances.

[0146] In the description of the application embodiments, it should be understood that the terms "up", "down", "left", "right", "front", "back", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the application embodiments and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the application embodiments.

[0147] Throughout this specification, terms such as "one embodiment," "some embodiments," and "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the claimed invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0148] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An energy storage device, characterized in that: include: The box body includes an upper cover, a base, and an inspection cover, wherein the upper cover and the base are connected to form a receiving cavity, and one of the upper cover and the base has an end panel, and the end panel has an inspection port extending therethrough, the inspection port is connected to the receiving cavity, and the inspection cover is configured to cover the inspection port; A battery module is located in the accommodating cavity; A mounting bracket is located in the accommodating cavity and is fixedly connected to the base; the mounting bracket includes a mounting portion, the mounting portion has an accommodating groove, the groove opening of the accommodating groove faces away from the accommodating cavity, and two locking structures are protruded from the bottom surface of the groove; A fuse is located in the accommodating cavity, assembled in the accommodating slot, and electrically connected to the battery module, with at least a portion of the fuse exposed at the inspection port; the fuse includes a fuse body located between the two locking structures and two connection terminals respectively provided on two opposite end surfaces of the fuse body; a heat-conducting layer, sandwiched between the fuse body and the access cover; Two conductive members, electrically connected to the two connection terminals respectively, and one of the conductive members is electrically connected to the battery module; as well as Two first locking members are respectively threadedly connected to the two locking structures to lock two corresponding sets of the conductive members and the wiring terminals, and to lock the fuse in the receiving slot; In which, a reinforcement structure is also provided around each of the locking structures, and the reinforcement structure is connected between the locking structure and the groove wall of the accommodating groove; the reinforcement structure includes a first rib and a second rib connected between the locking structure and the groove wall of the accommodating groove, the first rib extends along the height direction of the battery module, and the second rib extends along the width direction of the battery module, the first rib has a first limiting portion, and the second rib has a second limiting portion; the two first limiting portions are respectively located on the same side of the two connecting terminals, and the two second limiting portions are respectively located on the two sides of the two connecting terminals opposite to each other along the width direction of the battery module.

2. The energy storage device according to claim 1, characterized in that The inspection cover is detachably connected to the end panel.

3. The energy storage device according to claim 1, characterized in that The side of the inspection cover facing the battery module has an accommodating space, and a portion of the fuse extends out of the outer surface of the end panel through the inspection opening and is accommodated in the accommodating space.

4. The energy storage device according to claim 3, characterized in that A protrusion is provided on a surface of the inspection cover facing away from the battery module, and the accommodation space is recessed into the protrusion along the thickness direction of the inspection cover from the surface of the inspection cover facing the battery module.

5. The energy storage device according to claim 1, characterized in that The inspection cover has a accommodating space on the side facing the battery module, and part of the mounting portion extends out of the outer surface of the end panel through the inspection port and is accommodated in the accommodating space. The part of the mounting portion extending out of the outer surface of the end panel forms a notch of the accommodating groove.

6. The energy storage device according to claim 1, characterized in that The locking structure includes a wrapping portion and a second locking member embedded in the wrapping portion. The first locking member and the second locking member are threadedly connected to lock the fuse with the mounting portion.

7. The energy storage device according to claim 6, characterized in that The first locking member and the second locking member are made of metal material, and the mounting bracket and the wrapping portion are made of insulating material.

8. The energy storage device according to claim 1, characterized in that: The base includes a bottom plate, the battery module is assembled on the bottom plate, the side wall of the accommodating groove has a bottom side wall located between the bottom plate and the fuse, and the bottom side wall is concave inward toward the direction of the battery module to form two avoidance grooves, and the two conductive parts are respectively arranged in the two avoidance grooves.

9. The energy storage device according to claim 8, characterized in that The conductive member has a bent portion, and the bent portion is located on a side of the bottom side wall facing away from the fuse.

10. The energy storage device according to claim 1, characterized in that The base includes a bottom plate, the battery module is assembled on the bottom plate, and the groove side wall of the accommodating groove has a bottom side wall located between the bottom plate and the fuse.

11. The energy storage device according to claim 10, characterized in that The bottom side wall has a first protruding portion, and the first protruding portion protrudes from a surface of the fuse body facing away from the battery module; The sidewall of the receiving groove further includes a top sidewall disposed opposite to the bottom sidewall along the height direction of the battery module, the top sidewall having a second protruding portion, the second protruding portion extending from a surface of the fuse body facing away from the battery module; At least a portion of the heat conductive layer is located between the first protruding portion and the second protruding portion.

12. The energy storage device according to any one of claims 1 to 4, characterized in that: The mounting bracket is made of insulating material.

13. An electrical device, characterized in that: The energy storage device comprises the energy storage device according to any one of claims 1 to 12, wherein the energy storage device is used to supply power to the electrical equipment.

Images