Energy storage device

Abstract

Embodiments of the present disclosure provide an energy storage device. The energy storage device comprises a cabinet body, an energy storage member, a charging gun, and a cable; an air vent and a cable outlet hole are formed in an outer surface of the cabinet body, the air vent comprises an air inlet, and the air inlet is used for airflow to enter the interior of the cabinet body; the energy storage member is disposed inside the cabinet body; the charging gun is separable from the outer surface of the cabinet body; a portion of the cable is located outside the cabinet body, one end of the cable is electrically connected to the charging gun, the other end of the cable enters the interior of the cabinet body through the cable outlet hole and is electrically connected to the energy storage member, and at least a portion of the cable passes through the air inlet.

Description

An energy storage device

[0001] Cross-reference to related applications

[0002] This disclosure is based on and claims priority to Chinese Patent Application No. 202421595286.8, filed on July 8, 2024, entitled “An Energy Storage Device”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure relates to the field of energy storage technology, specifically to an energy storage device. Background Technology

[0004] In recent years, the new energy industry has flourished. Energy storage has become an important form of energy storage in the new energy system.

[0005] Energy storage devices refer to devices that can store and release electrical energy. They can store surplus electrical energy in the power grid and release the stored energy as needed, which helps alleviate the contradiction between power supply and demand in the power grid and mitigates the problem of power fluctuations caused by uneven power consumption.

[0006] Some types of energy storage devices are equipped with charging guns, which are used to output electrical energy to electrical devices, such as electric vehicles, to charge them.

[0007] The charging gun is electrically connected to the energy storage device via a cable, allowing the energy storage device to supply power to the charging gun through the cable. During the charging gun's power output process, the cable heats up due to resistance, which adversely affects the charging efficiency of the charging gun. Summary of the Invention

[0008] In view of this, the present disclosure aims to provide an energy storage device that facilitates heat dissipation from the cable connected to the charging gun.

[0009] To achieve the above objectives, the technical solution of this disclosure embodiment is implemented as follows:

[0010] This disclosure provides an energy storage device, which includes:

[0011] The cabinet has air vents and cable outlets on its outer surface. The air vents include air inlets, which are used for airflow to enter the interior of the cabinet.

[0012] Energy storage components are located inside the cabinet;

[0013] The charging gun can be detachably configured from the outer surface of the cabinet.

[0014] The cable is located outside the cabinet, with one end electrically connected to the charging gun and the other end entering the cabinet through the outlet hole to electrically connect to the energy storage device. At least part of the cable passes through the air inlet.

[0015] The energy storage device in this embodiment of the present disclosure allows the cable to pass through at least the air inlet, enabling the cable to directly dissipate heat and cool through the airflow flowing through the air inlet. This reduces the adverse effects of excessively high cable temperature on the charging efficiency of the charging gun. The airflow that exchanges heat with the cable is ambient temperature airflow from the outside, which helps to increase the temperature difference between the airflow and the cable, improve the efficiency of heat exchange, and enhance the cooling effect on the cable. The air vent is formed on the surface of the cabinet, which helps to reduce the overall outer contour size of the energy storage device and improve the adaptability of the energy storage device.

[0016] In some embodiments, the air vent also includes an air outlet for discharging airflow from inside the cabinet. The first wall of the cabinet is provided with an air inlet, and the second wall of the cabinet is provided with an air outlet.

[0017] This makes it difficult for the air discharged from the outlet to re-enter the inlet before it is fully cooled, which helps to reduce the probability of the airflow temperature rising when flowing into the inlet, increases the temperature difference between the airflow and the cable, improves the efficiency of heat exchange, and enhances the cooling effect on the cable.

[0018] In some embodiments, the outer surface of the cabinet is provided with a placement area for placing the charging gun, and the cable outlet, placement area and air outlet are all located on the first wall surface.

[0019] This reduces the likelihood of the cable passing through the second wall during the use of the charging gun, thereby reducing the chance of the airflow blowing against the cable from the air outlet.

[0020] In some embodiments, the air vent and the cable outlet are located on the same wall of the cabinet, and at least one air vent surrounds the periphery of the cable outlet.

[0021] Alternatively, multiple air vents can be arranged at intervals around the perimeter of the cable outlet.

[0022] In this way, a portion of the cable located near the outlet hole can always exchange heat with the airflow entering and exiting the vent, thereby improving the heat dissipation effect on the cable.

[0023] In some embodiments, the energy storage device further includes a limiting member disposed on the outer surface of the cabinet. The limiting member has a supporting surface that supports the cable in the vertical direction. When the charging gun is placed in the cabinet, in the vertical direction, the supporting surface is not lower than at least one of the connection position between the charging gun and the cable and the outlet hole.

[0024] In this way, by supporting the cable with the support surface, it is beneficial to extend the length of the part of the cable outside the cabinet; at the same time, since the limiting component can also limit the cable through friction, it is beneficial to keep the position of the part of the cable between the support surface and the outlet hole stable when the charging gun is in motion, thereby helping to maintain the heat exchange between the airflow of the vent and this part of the cable and improve the cooling efficiency.

[0025] In some embodiments, the air vent and the limiting member are located on the same wall of the cabinet, and at least one air vent surrounds the periphery of the limiting member;

[0026] Alternatively, multiple air vents can be arranged at intervals around the periphery of the limiting member.

[0027] This ensures that a portion of the cable located near the limiting component can always exchange heat with the airflow entering and exiting the vent, thereby improving the heat dissipation effect on the cable.

[0028] In some embodiments, the outer surface of the cabinet is provided with a placement area for placing the charging gun, the air vent includes an air inlet and an air outlet, the limiting member, the cable outlet hole, the placement area and the air outlet are all located on the first wall of the cabinet, and the air outlet is located on the second wall of the cabinet.

[0029] This reduces the likelihood of the cable passing through the second wall during the use of the charging gun, thereby reducing the chance of the airflow blowing against the cable from the air outlet.

[0030] In some embodiments, on a projection plane perpendicular to the vertical direction, the projection of the limiting member along the vertical direction is located between the projection of the wire outlet hole along the vertical direction and the projection of the placement area along the vertical direction.

[0031] This reduces the overlap and contact between the portion of the cable from the end connected to the charging gun to the limiting component and the portion of the cable from the limiting component to the cable passage hole under the influence of gravity. This allows the two portions to hang naturally under gravity, reducing the likelihood of the portion of the cable from the limiting component to the cable passage hole moving away from the air vent, thus improving heat dissipation.

[0032] In some embodiments, the vertical distance between the support surface and the bottom surface of the cabinet is not less than 2m. This reduces the probability that the cable located on the support surface will move or even detach from the support surface due to the movement of the charging gun. At the same time, it also helps to keep the cable in a stable position from the limiting member to the cable passage hole, thus ensuring that it passes through the air vent.

[0033] In some embodiments, the limiting member has a through-hole through which the cable passes, and the bottom wall of the through-hole forms a support surface. Thus, on the one hand, the interior of the through-hole supports the cable; on the other hand, the side wall of the through-hole constrains the cable in the vertical direction, further limiting the cable's range of motion and reducing the likelihood of the cable escaping the influence of the airflow from the vent.

[0034] In some embodiments, the cross-sectional area of ​​the cable through-hole perpendicular to its extension direction is larger than the cross-sectional area of ​​the cable perpendicular to its extension direction. This allows for flexible adjustment of the cable length between the charging gun and the limiting member according to the charging position of the charging gun on the electrical device, improving the flexibility of use.

[0035] In some embodiments, the energy storage device also includes a heat dissipation device located inside the cabinet. This device dissipates heat from the energy storage components and drives airflow into and out of the vents. This allows for direct heat dissipation of the cables using the airflow generated by the heat dissipation device, thereby simplifying the structure of the energy storage device and reducing its power consumption.

[0036] In some embodiments, the heat dissipation device is located above the energy storage device, and the air vent is located on at least one side of the heat dissipation device perpendicular to the vertical direction.

[0037] This approach helps to lower the center of gravity of the energy storage device, reducing the risk of it tipping over; it also helps to ensure that the vertical projections of the heat dissipation equipment and the energy storage components at least partially overlap, thus reducing the footprint of the energy storage device; it helps to shorten the airflow path between the vent and the heat dissipation equipment, improving airflow efficiency; and the higher position of the vent reduces the likelihood of airflow blowing onto operators during the charging process of the energy storage device. Attached Figure Description

[0038] Figure 1 is a front view of the energy storage device in the first embodiment of this disclosure;

[0039] Figure 2 is a right view of the embodiment in Figure 1;

[0040] Figure 3 is a rear view of the embodiment in Figure 1;

[0041] Figure 4 is a magnified view of a portion of position A in Figure 2;

[0042] Figure 5 is a partially enlarged schematic diagram of the energy storage device in the second embodiment of this disclosure, wherein the enlarged position is the same as position A in Figure 2;

[0043] Figure 6 is a magnified view of a portion of position B in Figure 2;

[0044] Figure 7 is a partially enlarged schematic diagram of the energy storage device in the second embodiment of this disclosure, wherein the enlarged position is the same as position B in Figure 2;

[0045] Figure 8 is a partially enlarged schematic diagram of the energy storage device in the third embodiment of this disclosure, wherein the enlarged position is the same as position B in Figure 2, and the limiting member is a partially cut-out schematic diagram.

[0046] Figure 9 is a magnified view of a portion of position C in Figure 3;

[0047] Figure 10 is a partially enlarged schematic diagram of the energy storage device in the third embodiment of this disclosure, wherein the enlarged position is the same as position C in Figure 3;

[0048] Figure 11 is a cross-sectional view of the DD position in Figure 1.

[0049] Explanation of reference numerals in the attached drawings: 10, cabinet; 10a, air vent; 10b, cable outlet; 10c, air inlet; 10d, air outlet; 10e, first wall surface; 10f, second wall surface; 10g, placement area; 10h, third wall surface; 20, charging gun; 30, cable; 40, limiting component; 40a, cable passage hole; 40b, supporting surface; 50, heat dissipation equipment; 60, energy storage component. Detailed Implementation

[0050] It should be noted that, unless otherwise specified, the embodiments and technical features in the embodiments of this disclosure can be combined with each other, and the detailed descriptions in the specific embodiments should be understood as explanations of the purpose of this disclosure and should not be regarded as undue limitations on this disclosure.

[0051] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this disclosure; the terms “comprising” and “having”, and any variations thereof, in the specification and the foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0052] In the description of the embodiments of this disclosure, technical terms such as "first," "second," and "third" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary or secondary relationship of the indicated technical features. In the description of the embodiments of this disclosure, "a plurality of" means two or more, unless otherwise explicitly defined.

[0053] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this disclosure. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0054] In the description of the embodiments of this disclosure, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects are in an "or" relationship.

[0055] In the description of the embodiments of this disclosure, for ease of explanation, as shown in FIG1, the direction of the arrow X is the straight line direction of the "vertical direction", the direction of x1 represents "up" or "top", and the direction of x2 represents "down", "bottom", or "gravity direction"; as shown in FIG2, the direction of the arrow Y is the "second direction"; as shown in FIG3, the direction of the arrow Z is the "first direction".

[0056] In the description of the embodiments of this disclosure, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0057] In the description of the embodiments of this disclosure, unless otherwise expressly specified and limited, the technical term "contact" should be interpreted broadly, and can be direct contact, contact through an intermediate medium layer, contact between two contacting parties with substantially no interaction force, or contact between two contacting parties with interaction force.

[0058] This disclosure provides an energy storage device including one or more energy storage components to increase the voltage and capacity of the energy storage device. The energy storage components may include multiple battery devices connected in series via a busbar to increase the voltage of the energy storage device. When the energy storage device includes multiple energy storage components, the multiple energy storage components are connected in parallel to increase the capacity of the energy storage device.

[0059] Energy storage devices can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems. Energy storage devices can store electrical energy as needed and output it when appropriate. For example, an energy storage device can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours. The energy storage system provided in this disclosure can be any power system that requires energy storage devices.

[0060] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0061] In some embodiments, the energy storage device may include a cabinet and one or more energy storage components, the energy storage components being housed within the cabinet.

[0062] In some embodiments, the energy storage device may include modules such as a thermal management module, a main control module, a central control module, a power distribution module, and a fire protection module.

[0063] As an example, the thermal management module may include a liquid cooling unit that supplies coolant to each battery device via piping to regulate the temperature of the individual battery cells.

[0064] As an example, the main control module can serve as the battery management unit for an energy storage device, used to monitor and manage the device. The main control module can monitor information such as the device's current, voltage, power, or temperature. For instance, it can control the charging and discharging current and voltage of the energy storage device. The main control module includes modules such as an auxiliary battery management unit (SBMU) and a fusion switch.

[0065] As an example, the central control module can serve as the battery management unit for an energy storage device, used to monitor and manage the device. The central control module can monitor information such as the energy storage device's current, voltage, power, state of charge, or temperature. For instance, it can control the charging and discharging current and voltage of the energy storage device. As an example, the central control module includes modules such as the Insulation Monitoring Module (IMM), the Master Battery Management Unit (MBMU), the Ethernet (ETH) module, and the fiber optic conversion module.

[0066] As an example, a fire protection system includes control panels, detectors, alarm devices, etc., used to detect, alarm, or extinguish fires in energy storage systems.

[0067] As an example, a power distribution module can be used to distribute power to the power-consuming modules in an energy storage device.

[0068] The battery apparatus mentioned in the embodiments of this disclosure may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells connected in series, parallel, or mixed connections via a busbar.

[0069] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0070] As an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form an independent module. As another example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0071] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cells housed within the housing.

[0072] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0073] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0074] As an example, the enclosure may include a first enclosure and a second enclosure. The first enclosure and the second enclosure are fastened together to form a closed space inside the enclosure to house the individual battery cells. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first enclosure may be a top cover or a bottom plate.

[0075] As an example, the enclosure may include a top cover, a frame, and a bottom plate. The top cover and bottom plate are connected to the frame, creating an enclosed space inside the enclosure to house the individual battery cells.

[0076] The embodiments of this disclosure will now be described in detail.

[0077] In related technologies, energy storage devices can not only store electrical energy, but also provide electrical energy to electrical devices, thereby expanding the applicability of energy storage devices.

[0078] The energy storage device includes an energy storage component, a cable, and a charging gun. The energy storage component is used to store and release electrical energy. The cable electrically connects the energy storage component and the charging gun. The charging gun can be used to make an electrical connection with the electrical device so that the electrical energy of the energy storage component can be transferred to the electrical device through the cable and the charging gun.

[0079] During the charging process of the charging gun charging the electrical device, the resistance of the cable itself causes the cable to heat up during the current flow, which adversely affects the charging efficiency of the charging gun.

[0080] Based on the above problems, this disclosure provides an energy storage device. The energy storage device is provided with an air inlet for airflow to enter and exit. The cable passes through the air inlet so that the airflow can exchange heat with the cable, thereby cooling the cable.

[0081] Specifically, referring to Figures 1 to 3, the energy storage device includes a cabinet 10, a charging gun 20, and a cable 30.

[0082] The outer surface of the cabinet 10 is provided with an air vent 10a and a cable outlet 10b. The air vent 10a includes an air inlet 10c, which is used for airflow to enter the interior of the cabinet 10.

[0083] Energy storage component 60 is located inside cabinet 10;

[0084] The charging gun 20 can be detachably configured from the outer surface of the cabinet 10;

[0085] A portion of the cable 30 is located outside the cabinet 10, with one end electrically connected to the charging gun 20 and the other end entering the interior of the cabinet 10 through the outlet hole 10b. At least a portion of the cable 30 passes through the air inlet 10c.

[0086] The cabinet 10 is used to form the outer contour surface of the energy storage device, providing installation positions and protection for other components inside the energy storage device, such as heat dissipation equipment 50 and energy storage components 60.

[0087] The surface of the cabinet 10 is provided with an air vent 10a. The air vent 10a is used for external airflow to enter or exit the interior of the cabinet 10, so as to achieve heat exchange directly or indirectly with the components inside the cabinet 10, such as the energy storage component 60, thereby playing a role in heat dissipation.

[0088] The specific type of energy storage device 60 is not limited, such as batteries, supercapacitors, flywheel energy storage devices, etc.

[0089] The charging gun 20 is used to electrically connect to the electrical device for charging.

[0090] The charging gun 20 and the cabinet 10 are detachable, meaning that the charging gun 20 can be placed on the cabinet 10 to fix its position; or it can be separated from the cabinet 10 so that the charging gun 20 can be electrically connected to the electrical device.

[0091] When the charging gun 20 needs to charge the electrical device, it can be separated from the cabinet 10 to make an electrical connection with the electrical device; when it does not need to be charged, it can be placed directly on the cabinet 10.

[0092] Understandably, the charging gun 20 is placed on the outer surface of the cabinet 10 for separation operations.

[0093] Cable 30 is used to supply power from the electrical energy stored in the energy storage unit 60 to the charging gun 20.

[0094] A portion of the cable 30 is located outside the cabinet 10 so that the operator can expand the range of motion of the charging gun 20 during use, in order to adapt to different locations of the electrical device.

[0095] A portion of the cable 30 located outside the cabinet 10 passes through the air inlet 10c, meaning that a portion of the cable 30 passes through the opening of the air inlet 10c so that the airflow entering the air inlet 10c can come into contact with the cable 30 and thus exchange heat with the cable 30.

[0096] It is understandable that the components inside the cabinet 10, such as the energy storage component 60, will generate heat during operation. The airflow entering the cabinet 10 can absorb some of the heat and carry it out of the cabinet 10. Therefore, the temperature of the airflow exiting the cabinet 10 is higher than the temperature of the airflow entering the cabinet 10.

[0097] In this embodiment of the energy storage device, the cable 30 passes through at least the air inlet 10c, allowing the cable 30 to directly dissipate heat and cool through the airflow flowing through the air inlet 10c. This reduces the adverse effects on the charging efficiency of the charging gun 20 caused by the excessive temperature of the cable 30. The airflow that exchanges heat with the cable 30 is a normal temperature airflow from the outside, which helps to increase the temperature difference between the airflow and the cable 30, improve the efficiency of heat exchange, and enhance the cooling effect on the cable 30. The air vent 10a is formed on the surface of the cabinet 10, which helps to reduce the overall outer contour size of the energy storage device and improve the adaptability of the energy storage device.

[0098] The number of air vents 10a is unlimited; there can be one or more.

[0099] In some embodiments, referring to Figures 2 and 3, the air vent 10a further includes an air outlet 10d, which is used to discharge airflow from inside the cabinet 10 to the cabinet 10. The first wall surface 10e of the cabinet 10 is provided with an air inlet 10c, and the second wall surface 10f of the cabinet 10 is provided with an air outlet 10d.

[0100] The air inlet 10c and the air outlet 10d are located on different walls.

[0101] This makes it difficult for the air discharged from the air outlet 10d to re-enter the air inlet 10c before it is fully cooled, which helps to reduce the probability of the airflow temperature rising when flowing into the air inlet 10c, increases the temperature difference between the airflow and the cable 30, improves the efficiency of heat exchange, and improves the cooling effect on the cable 30.

[0102] Understandably, cable 30 needs to be kept 10d away from the air outlet to reduce the chance of the high-temperature airflow heating cable 30.

[0103] In some embodiments, referring to Figures 2 and 3, the first wall 10e is located on one side of the cabinet 10 along the first direction, and the second wall 10f is located on one side of the cabinet 10 along the second direction. The first direction and the second direction intersect, and both are perpendicular to the vertical direction.

[0104] The vertical direction is the straight line in which gravity acts.

[0105] This helps to ensure that the orientation of the air inlet 10c is different from that of the air outlet 10d, and that the air inlet 10c is far away from the air outlet 10d, thereby reducing the chance that the airflow discharged from the air outlet 10d will blow against the cable 30.

[0106] Understandably, the first wall surface 10e extends vertically to help limit the cable 30 and reduce the probability that the cable 30 will sway due to suspension and move away from the air outlet 10a.

[0107] In some embodiments, referring to FIG2, the outer surface of the cabinet 10 is provided with a placement area 10g for placing the charging gun 20, and the cable outlet 10b, the placement area 10g and the air inlet 10c are all located on the first wall surface 10e.

[0108] The placement area 10g refers to the area in contact with the cabinet 10 when the charging gun 20 is not separated from the cabinet 10.

[0109] This helps to reduce the probability of the cable 30 passing through the second wall 10f during the use of the charging gun 20, thereby reducing the probability of the airflow from the air outlet 10d blowing against the cable 30.

[0110] The specific form of the placement area 10g is not limited. For example, a bracket is provided on the surface of the cabinet 10, and the charging gun 20 can be mounted on the bracket; or the surface of the cabinet 10 is provided with fixing holes, and the charging gun 20 is inserted into the fixing holes to achieve fixation.

[0111] In some embodiments, referring to Figures 1 to 3, the cabinet 10 includes a third wall surface 10h, which is located on the side of the cabinet 10 opposite to the second wall surface 10f along the second direction, and the third wall surface 10h is used to face the electrical device.

[0112] This helps to reduce the probability of the cable 30 passing through the second wall 10f during the use of the charging gun 20, thereby reducing the probability of the airflow from the air outlet 10d blowing against the cable 30.

[0113] In some embodiments, the first direction is perpendicular to the second direction.

[0114] It is understandable that the cable 30 is a flexible structure. Under the action of gravity and the tensile force generated by each use of the charging gun 20, the cable 30 itself will bend, coil and deform, causing the outer contour and position of the cable 30 relative to the cabinet 10 to change.

[0115] It is understandable that the position of the cable outlet hole 10b on the surface of the cabinet 10 is fixed. No matter how the position and shape of the cable 30 change, a portion of the cable 30 will always pass through the cable outlet hole 10b and be located near the cable outlet hole 10b.

[0116] In some embodiments, referring to FIG5, the air vent 10a and the cable outlet 10b are located on the same wall of the cabinet 10, and at least one air vent 10a surrounds the periphery of the cable outlet 10b.

[0117] Wall surfaces refer to the surfaces that form the outer contour of the cabinet 10. It can be understood that the cabinet 10 includes multiple wall surfaces.

[0118] In other words, in the projection plane of the normal to the wall where the vent 10a and the cable outlet 10b are located, the projection of the cable outlet 10b along the normal direction is located inside the projection of the vent 10a along the normal direction. No matter what angle the cable 30 rotates or bends, it must pass through the vent 10a.

[0119] In this way, a portion of the cable 30 located near the outlet hole 10b can always exchange heat with the airflow entering and exiting the vent 10a, thereby improving the heat dissipation effect on the cable 30.

[0120] In some embodiments, referring to FIG4, the air vent 10a and the cable outlet 10b are located on the same wall of the cabinet 10, and multiple air vents 10a are arranged at intervals around the cable outlet 10b.

[0121] In other words, in the projection plane of the normal to the wall where the air vent 10a and the cable outlet 10b are located, the projection of the cable outlet 10b along the normal direction is located inside the area enclosed by the projections of multiple air vents 10a along the normal direction.

[0122] In this way, a portion of the cable 30 located near the outlet hole 10b can always exchange heat with the airflow entering and exiting the vent 10a, thereby improving the heat dissipation effect on the cable 30; at the same time, it is beneficial for the vent 10a to be arranged in a grid pattern, which helps to reduce the adverse effects on the structural strength of the cabinet 10 caused by opening the vent 10a; it also reduces the probability of foreign objects entering the vent 10a.

[0123] In some embodiments, referring to Figures 2, 3, 6 to 10, the energy storage device further includes a limiting member 40, which is disposed on the outer surface of the cabinet 10. The limiting member 40 has a supporting surface 40b, which supports the cable 30 in the vertical direction. When the charging gun 20 is placed in the cabinet 10, in the vertical direction, the supporting surface 40b is not lower than at least one of the connection position between the charging gun 20 and the cable 30 and the outlet hole 10b.

[0124] In other words, in the vertical direction, the distance between the support surface 40b and the bottom of the cabinet 10 is L1, the distance between the upper edge of the connection point between the charging gun 20 and the cable 30 and the bottom of the cabinet 10 is L2, and the distance between the upper edge of the cable outlet 10b and the bottom of the cabinet 10 is L3. The value of either L2 or L3 is less than the value of L1.

[0125] Thus, by supporting the cable 30 with the support surface 40b, it is beneficial to extend the length of the part of the cable 30 outside the cabinet 10; at the same time, since the limiting member 40 can also limit the cable 30 through friction, it is beneficial to keep the position of the part of the cable 30 between the support surface 40b and the outlet hole 10b stable when the charging gun 20 is in motion, thereby helping to maintain the airflow of the air outlet 10a and the heat exchange between this part of the cable 30, and improving the cooling efficiency.

[0126] It is understandable that the position of the support surface 40b relative to the surface of the cabinet 10 is fixed. No matter how the position and shape of the cable 30 change, a portion of the cable 30 will always be located on the support surface 40b and near the limiting member 40.

[0127] In some embodiments, referring to FIG7, the air vent 10a and the limiting member 40 are located on the same wall of the cabinet 10, and at least one air vent 10a surrounds the periphery of the limiting member 40.

[0128] In the projection plane perpendicular to the normal of the wall where the air vent 10a and the limiting member 40 are located, the projection of the limiting member 40 along the normal direction is located inside the projection of the air vent 10a along the normal direction. Regardless of the angle at which the cable 30 rotates or bends, it must pass through the air vent 10a.

[0129] In this way, a portion of the cable 30 located near the limiting member 40 can always exchange heat with the airflow entering and exiting the vent 10a, thereby improving the heat dissipation effect on the cable 30.

[0130] In some embodiments, referring to FIG6, the air vent 10a and the limiting member 40 are located on the same wall of the cabinet 10, and multiple air vents 10a are arranged at intervals around the limiting member 40 along the circumference of the limiting member 40.

[0131] In other words, in the projection plane perpendicular to the normal of the wall where the air vent 10a and the limiting member 40 are located, the projection of the limiting member 40 along the normal direction is located inside the area enclosed by the projections of multiple air vents 10a along the normal direction.

[0132] In this way, a portion of the cable 30 located near the limiting member 40 can always exchange heat with the airflow entering and exiting the vent 10a, thereby improving the heat dissipation effect on the cable 30.

[0133] In some embodiments that include a placement area 10g, an air inlet 10c, and an air outlet 10d, referring to FIG2, the limiting member 40, the cable outlet 10b, the placement area 10g, and the air inlet 10c are all located on the first wall surface 10e of the cabinet 10, and the air outlet 10d is located on the second wall surface 10f of the cabinet 10.

[0134] This helps to reduce the probability of the cable 30 passing through the second wall 10f during the use of the charging gun 20, thereby reducing the probability of the airflow from the air outlet 10d blowing against the cable 30.

[0135] The cable 30 can be divided into two parts: a first part from the end connected to the charging gun 20 to the limiting member 40, and a second part from the limiting member 40 to the cable passage hole 40a. During the process of picking up and putting down the charging gun 20, the first part will move. If the first part comes into contact with the second part, it may cause the second part to move as well.

[0136] In some embodiments, referring to FIG2, on a projection plane perpendicular to the vertical direction, the projection of the limiting member 40 along the vertical direction is located between the projection of the wire outlet hole 10b along the vertical direction and the projection of the placement area 10g along the vertical direction.

[0137] This reduces the overlap and contact between the portion of cable 30 from the end connected to the charging gun 20 to the limiting member 40 and the portion of cable 30 from the limiting member 40 to the wire passage hole 40a under the influence of gravity. This allows the two portions to hang naturally by gravity, reducing the likelihood of the portion of cable 30 from the limiting member 40 to the wire passage hole 40a moving away from the air vent 10a, thus improving heat dissipation.

[0138] It is understandable that during the process of the operator picking up and placing the charging gun 20, the charging gun 20 moves with the operator's hand.

[0139] In some embodiments, referring to Figure 3, the distance between the support surface 40b and the bottom surface of the cabinet 10 in the vertical direction is not less than 2m (meter). That is, L1≥2m.

[0140] During the process of the operator picking up and placing the charging gun 20, the height of the support surface 40b can always be higher than the height of the charging gun 20.

[0141] This reduces the likelihood that the cable 30 located on the support surface 40b will move or even detach from the support surface 40b due to the movement of the charging gun 20. At the same time, it also helps to stabilize the position of the cable 30 from the limiting member 40 to the cable hole 40a and keep it passing through the air vent 10a.

[0142] The specific value of the distance between the support surface 40b and the bottom surface of the cabinet 10 can be 2m, 2.1m, 2.2m, 2.3m, 2.4m, etc.

[0143] The specific method of forming the support surface 40b is not limited.

[0144] For example, referring to Figures 8, 9 and 10, the limiting member 40 is provided with a through wire hole 40a, the cable 30 passes through the wire hole 40a, and the bottom wall of the wire hole 40a forms a support surface 40b.

[0145] Thus, on the one hand, the inside of the wire hole 40a serves to support the cable 30, and on the other hand, the side wall of the wire hole 40a can constrain the cable 30 in the vertical direction, which further helps to constrain the range of motion of the cable 30 and reduces the probability of the cable 30 leaving the airflow range of the vent 10a.

[0146] The specific structural form of the limiting component 40 is not limited.

[0147] For example, referring to Figures 7 and 9, the limiting member 40 is a hook, and the top side of the cable hole 40a is open to allow the cable 30 to enter and exit, which facilitates the disassembly and replacement of the cable 30.

[0148] For example, referring to Figures 8 and 9, the limiting member 40 is a clamp, which improves the restraint effect on the limiting member 40, further helps to restrain the range of movement of the cable 30, and reduces the probability that the cable 30 will leave the airflow range of the vent 10a.

[0149] In some embodiments, referring to Figures 9 and 10, the cross-sectional area of ​​the wire hole 40a perpendicular to its extension direction is greater than the cross-sectional area of ​​the cable 30 perpendicular to its extension direction.

[0150] The cable 30 can travel through the through hole 40a in the direction of extension of the through hole 40a.

[0151] This allows for flexible adjustment of the cable 30 between the charging gun 20 and the limiting member 40 according to the charging position requirements of the charging gun 20 for the electrical device, thus improving the flexibility of use.

[0152] The specific method of forming inlet and outlet airflow in vent 10a is not limited.

[0153] In some embodiments, referring to FIG11, the energy storage device further includes a heat dissipation device 50, which is disposed inside the cabinet 10. The heat dissipation device 50 is used to dissipate heat from the energy storage component 60 and drive airflow in and out of the air inlet 10a.

[0154] In this way, the airflow generated by the heat dissipation device 50 is used to dissipate heat from the cable 30, which helps to simplify the structure of the energy storage device and reduce the power consumption of the energy storage device itself.

[0155] The specific method by which the heat dissipation device 50 achieves heat dissipation is not limited. For example, the heat dissipation device 50 includes a delivery pump, a heat exchange circuit, and a fan. The heat exchange circuit stores a fluid medium for heat exchange, such as water. The delivery pump drives the fluid medium to circulate in the heat exchange. The fluid medium in the heat absorption section of the heat exchange circuit exchanges heat with the energy storage device 60. After absorbing heat from the energy storage device 60, the fluid medium flows to the heat release section of the heat exchange circuit. The fan rotates and draws airflow from outside the cabinet 10. The airflow exchanges heat with the fluid medium in the heat release section and is heated. Then, driven by the fan, it leaves the cabinet 10, and the cooled fluid medium flows back to the heat absorption section. The above process is repeated to achieve the purpose of cooling the energy storage device 60 and generating airflow.

[0156] In some embodiments, referring to FIG11, the heat dissipation device 50 is located above the energy storage device 60, and the air vent 10a is located on at least one side of the heat dissipation device 50 perpendicular to the vertical direction.

[0157] Understandably, the mass of the heat dissipation device 50 is lower than that of the energy storage device 60.

[0158] The air vent 10a and the heat dissipation device 50 are both higher than the energy storage device 60.

[0159] This approach helps to lower the center of gravity of the energy storage device, reducing the risk of it tipping over; it also helps to ensure that the vertical projections of the heat dissipation device 50 and the energy storage component 60 at least partially overlap, thus reducing the footprint of the energy storage device; it helps to shorten the airflow path between the vent 10a and the heat dissipation device 50, improving airflow efficiency; and the higher position of the vent 10a reduces the likelihood of airflow blowing onto operators during the charging process of the energy storage device.

[0160] It is understood that in some embodiments including air inlet 10c and air outlet 10d, referring to FIG11, air inlet 10c is located on at least one side of heat dissipation device 50 along a first direction, and air outlet 10d is located on at least one side of heat dissipation device 50 along a second direction, the first direction being perpendicular to the second direction, and both being perpendicular to the vertical direction.

[0161] In an embodiment where the energy storage device 60 is a battery, the battery includes a housing and at least one battery cell.

[0162] The enclosure includes a top cover and a bottom cover, with the top cover covering the bottom cover, thereby creating an installation space between the bottom cover and the top cover for placing individual battery cells.

[0163] In a battery, there can be multiple battery cells, which can be connected in series, parallel, or a combination thereof. A combination thereof means that multiple battery cells are connected in both series and parallel configurations. Multiple battery cells can be directly connected in series, parallel, or a combination thereof, and then the assembly of these multiple battery cells is placed within the space formed by the bottom and top covers. Alternatively, the battery can be composed of multiple battery cells first connected in series, parallel, or a combination thereof to form a battery module, and then these battery modules are connected in series, parallel, or a combination thereof to form a whole, which is also housed within the space formed by the bottom and top covers. The battery may also include other structures; for example, it may include a busbar component for electrical connection between the multiple battery cells.

[0164] The battery cell involved in this disclosure includes an electrode assembly and an electrolyte. The electrode assembly consists of a positive electrode, a negative electrode, and a separator. The battery cell mainly relies on the movement of metal ions between the positive and negative electrode plates to function. The positive electrode includes a positive current collector and a positive active material layer. The positive active material layer is coated on the surface of the positive current collector. The current collector without the positive active material layer protrudes from the current collector with the positive active material layer. The current collectors without the positive active material layer are stacked together to form the positive electrode tab. Taking a lithium-ion battery as an example, the material of the positive current collector can be aluminum, and the positive active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode includes a negative current collector and a negative active material layer. The negative active material layer is coated on the surface of the negative current collector. The current collector without the negative active material layer protrudes from the current collector with the negative active material layer. The current collectors without the negative active material layer are stacked together to form the negative electrode tab. The negative electrode current collector can be made of copper, and the negative electrode active material can be carbon or silicon, etc. The separator can be made of PP (polypropylene) or PE (polyethylene), etc. In addition, the electrode assembly can be a wound structure or a stacked structure.

[0165] A single battery cell can be a rechargeable battery. A rechargeable battery is a battery cell that can be recharged after it has been discharged, allowing the active materials to be activated and the cell to continue to be used.

[0166] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments disclosed herein are not limited to this.

[0167] The battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries. There are no particular limitations in the embodiments disclosed herein.

[0168] In this disclosure, the battery refers to a single physical module comprising one or more battery cells to provide higher voltage and capacity.

[0169] A specific embodiment of this disclosure is as follows:

[0170] The energy storage device includes a cabinet 10, a charging gun 20, a limiting member 40, a heat dissipation device 50, and an energy storage component 60. The outer surface of the cabinet 10 has an air outlet 10d, an air inlet 10c, and a cable outlet 10b. A portion of the cable 30 is located outside the cabinet 10, with one end electrically connected to the charging gun 20 and the other end entering the interior of the cabinet 10 through the cable outlet 10b and electrically connected to the energy storage component 60. At least a portion of the cable 30 passes through the air inlet 10c. The outer surface of the cabinet 10 has a placement area 10g for placing the charging gun 20. The limiting member 40 is located on the outer surface of the cabinet 10 and has a support surface 40b. The support surface 40b supports the cable 30 vertically. When the charging gun 20 is placed in the cabinet 10, the support surface 40b is not lower than at least one of the connection point between the charging gun 20 and the cable 30 and the cable outlet 10b in the vertical direction. The limiting member 40, the cable outlet 10b, the placement area 10g, and the air inlet 10c are all located on the first wall surface 10e of the cabinet 10, and the air outlet 10d is located on the second wall surface 10f of the cabinet 10. Multiple air inlets 10c are arranged at intervals around the cable outlet 10b circumferentially. Multiple air inlets 10c are also arranged at intervals around the limiting member 40 circumferentially. On a projection plane perpendicular to the vertical direction, the vertical projection of the limiting member 40 lies between the vertical projection of the cable outlet 10b and the vertical projection of the placement area 10g. In the vertical direction, the distance between the support surface 40b and the bottom surface of the cabinet 10 is not less than 2m. The limiting member 40 has a through cable hole 40a, through which the cable 30 passes, and the bottom wall of the cable hole 40a forms the support surface 40b. The cross-sectional area of ​​the cable hole 40a perpendicular to its extension direction is greater than the cross-sectional area of ​​the cable 30 perpendicular to its extension direction. The heat dissipation device 50 and the energy storage component 60 are located inside the cabinet 10. The heat dissipation device 50 is used to dissipate heat from the energy storage component 60 and drive airflow into and out of the air vent 10d. The heat dissipation device 50 is located above the energy storage component 60, and the air vent 10a is located on at least one side of the heat dissipation device 50 perpendicular to the vertical direction.

[0171] The various embodiments / implementations provided in this disclosure can be combined with each other without creating contradictions.

[0172] The above are merely preferred embodiments of this disclosure and are not intended to limit the embodiments therein. Those skilled in the art will recognize various modifications and variations of the embodiments of this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of this disclosure should be included within the protection scope of the embodiments of this disclosure.

Claims

1. An energy storage device, the energy storage device comprising: The cabinet has an air vent and a cable outlet on its outer surface. The air vent includes an air inlet, which is used for airflow to enter the interior of the cabinet. Energy storage components are located inside the cabinet. The charging gun is detachably configured from the outer surface of the cabinet. The cable has a portion located outside the cabinet, one end of which is electrically connected to the charging gun, and the other end enters the interior of the cabinet through the outlet hole and is electrically connected to the energy storage device. At least a portion of the cable passes through the air inlet.

2. The energy storage device according to claim 1, wherein, The air vent also includes an air outlet, which is used to discharge airflow from inside the cabinet. The first wall of the cabinet is provided with the air inlet, and the second wall of the cabinet is provided with the air outlet.

3. The energy storage device according to claim 2, wherein, The outer surface of the cabinet is provided with a placement area for placing the charging gun, and the cable outlet, the placement area and the air inlet are all located on the first wall surface.

4. The energy storage device according to any one of claims 1 to 3, wherein, The air vent and the cable outlet are located on the same wall of the cabinet, and at least one of the air vents surrounds the periphery of the cable outlet. Alternatively, multiple air vents may be arranged at intervals around the periphery of the outlet hole.

5. The energy storage device according to any one of claims 1 to 4, wherein, The energy storage device also includes a limiting member, which is disposed on the outer surface of the cabinet. The limiting member has a supporting surface, which supports the cable in the vertical direction. When the charging gun is placed in the cabinet, in the vertical direction, the supporting surface is not lower than at least one of the connection position between the charging gun and the cable and the outlet hole.

6. The energy storage device according to claim 5, wherein, The air vent and the limiting member are located on the same wall of the cabinet, and at least one of the air vents surrounds the periphery of the limiting member; Alternatively, multiple air vents may be arranged at intervals around the periphery of the limiting member.

7. The energy storage device according to claim 5 or 6, wherein, The outer surface of the cabinet is provided with a placement area for placing the charging gun. The air vent includes an air inlet and an air outlet. The limiting member, the cable outlet hole, the placement area and the air inlet are all located on the first wall of the cabinet, and the air outlet is located on the second wall of the cabinet.

8. The energy storage device according to claim 7, wherein, On a projection plane perpendicular to the vertical direction, the projection of the limiting member along the vertical direction is located between the projection of the wire outlet hole along the vertical direction and the projection of the placement area along the vertical direction.

9. The energy storage device according to any one of claims 5 to 8, wherein, In the vertical direction, the distance between the supporting surface and the bottom surface of the cabinet is not less than 2m.

10. The energy storage device according to any one of claims 5 to 9, wherein, The limiting member has a through-hole for the cable, which is inserted through the cable. The bottom wall of the through-hole forms the supporting surface.

11. The energy storage device according to claim 10, wherein, The cross-sectional area of ​​the wire hole perpendicular to its extension direction is greater than the cross-sectional area of ​​the cable perpendicular to its extension direction.

12. The energy storage device according to any one of claims 1 to 11, wherein, The energy storage device also includes a heat dissipation device, which is located inside the cabinet and is used to dissipate heat from the energy storage component and drive airflow in and out of the air vent.

13. The energy storage device according to claim 12, wherein, The heat dissipation device is located above the energy storage device, and the air vent is located on at least one side of the heat dissipation device perpendicular to the vertical direction.

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