Energy storage device

Abstract

The utility model provides an energy storage device. The energy storage device comprises a first base; the second base and the first base are transversely arranged at intervals; the first battery pack comprises a plurality of first battery modules, and the plurality of first battery modules are vertically stacked on the first base in the forward direction and are sequentially connected in series; the second battery pack comprises a plurality of second battery modules, and the second battery modules are reversely and vertically stacked on the second base and are sequentially connected in series; and an electrical connector for connecting the bottommost first battery module and the bottommost second battery module, thereby implementing a series connection of the first battery pack and the second battery pack. The energy storage device has the advantages that the overall height of the energy storage device can be reduced, and excessive stacking of battery packs in the vertical direction is avoided.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to an energy storage device. Background Technology

[0002] In today's energy storage and application field, user demands are constantly growing, especially the demand for large-capacity energy storage solutions. To meet this market demand, the industry has launched inverter systems that support multi-cell stacking within a single cluster, aiming to provide users with reliable energy storage and conversion solutions through compact design and high-efficiency conversion.

[0003] However, in practical applications, existing product designs often tightly integrate the inverter and battery pack into a single module. When the number of battery clusters stacked reaches six, the height of the entire system often exceeds 2 meters. This undoubtedly increases the difficulty and inconvenience of installation in many scenarios with limited space. Furthermore, excessive installation height can also affect the user experience, for example, requiring additional safety measures and tools during maintenance or inspection. Utility Model Content

[0004] One objective of this invention is to overcome at least one deficiency in the prior art and to provide an energy storage device.

[0005] A further objective of this invention is to reduce the overall height of the energy storage device and avoid excessive stacking of battery packs in the vertical direction.

[0006] Another further objective of this invention is to utilize the combination of salient and concave electrodes to ensure stable power output of the battery pack.

[0007] Specifically, this utility model provides an energy storage device, comprising:

[0008] First base;

[0009] The second base is arranged horizontally at intervals from the first base;

[0010] The first battery pack includes multiple first battery modules, which are stacked vertically on the first base and connected in series in sequence.

[0011] The second battery pack includes multiple second battery modules, which are stacked vertically in opposite directions on the second base and connected in series.

[0012] An electrical connector is used to connect the bottommost first battery module and the bottommost second battery module, thereby realizing the series connection between the first battery pack and the second battery pack.

[0013] Optionally, the first battery module has a first convex electrode at the top and a first concave electrode at the bottom. In two adjacent first battery modules, the first concave electrode of the upper first battery module and the first convex electrode of the lower first battery module are connected by plugging to achieve electrical conduction.

[0014] The second battery module has a second concave electrode at the top and a second convex electrode at the bottom. In two adjacent second battery modules, the second convex electrode of the upper second battery module is inserted into and connected to the second concave electrode of the lower second battery module to achieve electrical conduction.

[0015] Optionally, the first base has a top convex pole, and the first concave pole of the first battery module located at the bottom is electrically connected to the top convex pole of the first base through a plug-in engagement.

[0016] The second base has a top concave electrode, and the second convex electrode of the second battery module located at the bottom is connected to the top concave electrode of the second base to achieve electrical conduction.

[0017] The electrical connector connects the first base and the second base, thereby connecting the bottommost first battery module and the bottommost second battery module.

[0018] Optionally, the first base and the second base have the same structure.

[0019] Optionally, the energy storage device also includes:

[0020] A power conversion module, located on top of the first battery pack, is used to convert the DC power output from the first and second battery packs into AC power, or to convert AC power from an external power source into DC power.

[0021] Optionally, the energy storage device also includes:

[0022] The power distribution box module is located at the bottom of the power conversion module and is used to distribute the electrical energy output by the first battery pack and the second battery pack.

[0023] Optionally, the energy storage device also includes:

[0024] The charging module is located at the bottom of the power distribution box module and is used to deliver electrical energy provided by an external power source to the first battery pack and the second battery pack, thereby charging the first battery pack and the second battery pack.

[0025] Optionally, the number of the first battery modules is configured such that the height between the top of the power conversion module and the bottom of the first base is less than 2m.

[0026] Optionally, the number of the second battery modules is greater than or equal to the number of the first battery modules.

[0027] Optionally, the energy storage device also includes:

[0028] A top cover module is fastened to the top of the second battery pack to protect the second battery pack.

[0029] The energy storage device of this invention features a horizontally spaced first and second base, avoiding excessive vertical stacking common in traditional energy storage devices and resulting in a more rational spatial layout. This horizontal arrangement effectively reduces the overall height of the device, making it particularly suitable for installation spaces with limited space, significantly improving space utilization and reducing the space requirements for the installation site. Furthermore, the design of the first battery pack being stacked vertically in the forward direction and the second battery pack being stacked vertically in the reverse direction overcomes the heat accumulation problem that can occur with traditional unidirectional stacking of battery packs. This forward and reverse stacking method creates a heat dissipation channel that is more conducive to air convection, allowing the heat generated during charging and discharging to dissipate more quickly and effectively, reducing the battery's operating temperature, extending its lifespan, and improving its performance and stability.

[0030] Furthermore, in the energy storage device of this invention, the battery modules in the first and second battery packs employ a salient-to-concave electrode insertion and connection method, enabling close physical contact between adjacent battery modules and effectively reducing contact resistance. This allows for smooth current transmission between adjacent battery modules, reduces energy loss at the connection points, ensures stable power output of the entire battery pack, and improves the working efficiency of the energy storage device.

[0031] Furthermore, the energy storage device of this invention allows the first and second bases to be flipped and interchanged, with the corresponding salient and concave electrodes being interchangeable after flipping. This eliminates the need for separate production molds and production lines for the two different functional bases, reducing mold development costs and equipment investment, and effectively lowering overall production costs. Additionally, installers do not need to carefully distinguish between the first and second bases; even if the wrong base is used during installation, it can be easily flipped for normal use, avoiding the need for disassembly and reinstallation due to incorrect base installation, significantly simplifying the installation process and shortening installation time.

[0032] The above and other objects, advantages and features of this utility model will become more apparent to those skilled in the art from the following detailed description of specific embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description

[0033] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0034] Figure 1 This is a schematic front view of an energy storage device according to an embodiment of the present invention;

[0035] Figure 2 This is a schematic structural diagram of a first battery module and a second battery module according to an embodiment of the present utility model;

[0036] Figure 3 This is a schematic top view of the first base and the second base according to an embodiment of the present utility model;

[0037] Figure 4 This is a schematic top view of the first base and the second base according to another embodiment of the present utility model.

[0038] Figure label:

[0039] 10. Energy storage device; 110. First base; 111. Top convex electrode; 120. Second base; 121. Top concave electrode; 130. Electrical connector; 210. First battery module; 211. First convex electrode; 212. First concave electrode; 220. Second battery module; 221. Second convex electrode; 222. Second concave electrode; 310. Power conversion module; 320. Distribution box module; 330. Charging module; 340. Top cover module. Detailed Implementation

[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0041] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture. If the specific posture changes, the directional indicator will also change accordingly.

[0042] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0043] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0044] This utility model provides an energy storage device 10. Figure 1 This is a schematic front view of an energy storage device 10 according to an embodiment of the present invention. Figure 2 This is a schematic structural diagram of the first battery module 210 and the second battery module 220 according to an embodiment of the present invention. Figure 3 This is a schematic top view of the first base 110 and the second base 120 according to an embodiment of the present utility model.

[0045] like Figures 1 to 3 As shown, the energy storage device 10 generally includes a first base 110, a second base 120, a first battery pack, a second battery pack, and an electrical connector 130.

[0046] The first base 110 and the second base 120 are used to support the first battery pack and the second battery pack, respectively. The first base 110 and the second base 120 can be placed on the indoor ground. The indoor environment is usually relatively stable and can provide relatively suitable temperature, humidity and protection conditions for the energy storage device 10, which helps to extend the service life of the device and reduce the damage of the battery pack and other components to the harsh external environment.

[0047] The second base 120 can be arranged laterally at a distance from the first base 110. This layout breaks away from the traditional vertical stacking or compact arrangement, dispersing the space occupied by the device in the horizontal direction. At the same time, the lateral spacing also provides space for heat dissipation of the battery pack, which is conducive to air circulation and removes the heat generated by the battery during charging and discharging, ensuring the normal operating temperature of the battery pack.

[0048] The first battery pack may include multiple first battery modules 210, which are vertically stacked in the forward direction on the first base 110 and connected in series. The second battery pack may include multiple second battery modules 220, which are vertically stacked in the reverse direction on the second base 120 and connected in series. The first battery modules 210 and the second battery modules 220 are the basic units of energy storage. The first battery modules 210 and the second battery modules 220 may have the same or similar specifications and performance to ensure the stability and consistency of the entire battery pack.

[0049] Electrical connector 130 is used to connect the bottommost first battery module 210 and the bottommost second battery module 220, thereby realizing a series connection between the first and second battery packs. Through this connection method, the two battery packs can work as a whole, further improving the voltage and energy storage capacity of the entire energy storage device 10.

[0050] The energy storage device 10 of this embodiment, with its first base 110 and second base 120 arranged laterally at intervals, avoids the excessive vertical stacking of traditional energy storage devices 10, making the overall spatial layout of the energy storage device 10 more reasonable. This lateral arrangement can effectively reduce the overall height of the device, and is especially suitable for scenarios with limited installation space, significantly improving space utilization and reducing the space requirements for the installation site.

[0051] Meanwhile, the design of stacking the first battery pack vertically in the forward direction and the second battery pack vertically in the reverse direction breaks the heat accumulation problem that may be caused by the traditional single-direction stacking of battery packs. This forward and reverse stacking method can form a heat dissipation channel that is more conducive to air convection, allowing the heat generated by the battery during charging and discharging to be dissipated more quickly and effectively, reducing the battery's operating temperature, helping to extend the battery's lifespan, and improving the battery's performance and stability.

[0052] In this embodiment, the first battery module 210 and the second battery module 220 have identical structures, the only difference being that the first battery module 210 is installed facing forward, while the second battery module 220 is installed in reverse (or upside down). Figure 2 After the first battery module 210 is rotated 180°, it can be used as the second battery module 220.

[0053] Furthermore, the first base and the second base have identical structures, and are arranged in a planar symmetrical layout. For example... Figure 3 As shown, after rotating the plane of the first base 110 by 180°, it can serve as the second base 120, which can cooperate with the first battery module 210 after rotating the vertical plane by 180°.

[0054] By adopting the above structure, there is no need to design separate production molds and production lines for the two different functional bases, which reduces mold development costs and investment in production equipment, and effectively reduces the overall production cost.

[0055] In addition, installers do not need to carefully distinguish between the first base 110 and the second base 120. Even if the wrong base is picked up during installation, it can be used normally simply by flipping it over. This avoids the need for disassembly and reinstallation due to incorrect base installation, significantly simplifying the installation process and shortening the installation time.

[0056] It is worth noting that existing battery modules of the same specifications typically have a heat dissipation component, such as a thermoelectric cooler, on one side for heat dissipation. If two battery modules are both mounted upright and their heat dissipation components are located on the same side (e.g., the left side), then when they are placed side by side, the heat dissipation components may interfere with each other or fail to effectively dissipate heat to the surrounding environment.

[0057] However, in this embodiment, since the second battery module 220 is installed upside down, its heat dissipation component is automatically moved to the right side. Thus, the heat dissipation component of the first battery module 210 dissipates heat on the left side, while the heat dissipation component of the second battery module 220 dissipates heat on the right side, without interfering with each other. This design not only improves heat dissipation efficiency but also allows for more flexible battery module layout.

[0058] In an optional embodiment, the first battery module 210 has a first convex electrode 211 at the top and a first concave electrode 212 at the bottom. In two adjacent first battery modules 210, the first concave electrode 212 of the upper first battery module 210 and the first convex electrode 211 of the lower first battery module 210 are connected by plugging to achieve electrical conduction.

[0059] Similarly, the second battery module 220 has a second concave electrode 222 at the top and a second convex electrode 221 at the bottom. In two adjacent second battery modules 220, the second convex electrode 221 of the upper second battery module 220 is inserted and connected to the second concave electrode 222 of the lower second battery module 220 to achieve electrical conduction.

[0060] With the above structure, the battery modules in the first and second battery packs can form a tight physical contact between adjacent battery modules through the insertion and connection of salient and concave electrodes, effectively reducing contact resistance. This allows for smooth current transmission between adjacent battery modules, reduces energy loss at the connection points, ensures stable power output of the entire battery pack, and improves the working efficiency of the energy storage device 10.

[0061] Taking the first battery module 210 as an example, the first convex electrode 211 of the first battery module 210 is an outwardly protruding conductive structure with a certain shape and size, which can be tightly fitted with the corresponding first concave electrode 212. The first concave electrode 212 of the first battery module 210 is an inwardly recessed structure, whose shape and size are adapted to the first convex electrode 211, and is used to accommodate the first convex electrode 211.

[0062] When multiple first battery modules 210 are stacked, two adjacent first battery modules 210 are connected by inserting the first concave electrode 212 of the upper first battery module 210 with the first convex electrode 211 of the lower first battery module 210. This connection method is similar to the connection of a common plug and socket, which is simple and convenient to operate. The connection can be completed simply by accurately inserting the first convex electrode 211 into the first concave electrode 212.

[0063] Both the first salient electrode 211 and the first concave electrode 212 are made of conductive material. When they are tightly connected by plugging, current can flow between the two adjacent first battery modules 210, thereby achieving electrical conduction. This connection method can ensure the stability and reliability of current transmission and reduce problems such as increased resistance and energy loss caused by poor connection.

[0064] The standardized design of the first salient electrode 211 and the first concave electrode 212 gives the first battery module 210 good interchangeability and expandability. When it is necessary to increase the capacity of the energy storage device 10, it can be achieved by simply increasing the number of first battery modules 210. The newly added battery modules can be smoothly connected to the original battery pack, making it convenient and quick to expand the system.

[0065] In one optional embodiment, the first base 110 has a top convex electrode 111, and the first concave electrode 212 of the bottommost first battery module 210 is electrically connected to the top convex electrode 111 of the first base 110 through a plug-in engagement. The second base 120 has a top concave electrode 121, and the second convex electrode 221 of the bottommost second battery module 220 is electrically connected to the top concave electrode 121 of the second base 120 through a plug-in engagement. The electrical connector 130 connects the bottommost first battery module 210 and the bottommost second battery module 220 by connecting the first base 110 and the second base 120.

[0066] The top convex electrode 111 has the same structure as the first convex electrode 211 / second convex electrode 221. Its design purpose is to be plugged into the first concave electrode 212 of the bottom first battery module 210 to ensure that the current can be smoothly transmitted between the first battery module 210 and the first base 110.

[0067] The top concave electrode 121 has the same structure as the first concave electrode 212 / second concave electrode 222. Its design purpose is to connect and cooperate with the second convex electrode 221 of the bottommost second battery module 220 to ensure that the current can be smoothly transmitted between the second battery module 220 and the second base 120.

[0068] The electrical connector 130 can be a wire or conductor made of conductive material, which can connect the current path between the first base 110 and the second base 120. Through the electrical connector 130, the first battery pack and the second battery pack can form a complete series circuit, enabling the entire energy storage device 10 to operate normally.

[0069] In one alternative embodiment, such as Figure 3 As shown, electrical connector 130 can be selected as a quick-connect waterproof terminal.

[0070] The energy storage device 10 requires stable and reliable electrical connections during operation. Quick-connect waterproof terminals provide low-resistance connections, ensuring smooth current flow between the first and second battery packs and reducing energy loss. Simultaneously, their excellent contact performance guarantees connection stability, preventing voltage fluctuations and equipment malfunctions caused by loosening or poor contact.

[0071] Figure 4 This is a schematic top view of the first base 110 and the second base 120 according to another embodiment of the present invention, as shown below. Figure 4 As shown, the electrical connector 130 can also be an electrical connector wire. The two ends of the electrical connector wire have terminals for connecting the first convex pole 111 to the second concave pole 122 and the second convex pole 121 to the first concave pole 112.

[0072] The energy storage device 10 in this embodiment may also include: a power conversion module 310, a power distribution box module 320, and a charging module 330, etc.

[0073] Specifically, the power conversion module 310 can be located on top of the first battery pack and is used to convert the DC power output from the first battery pack and the second battery pack into AC power, or to convert AC power from an external power source into DC power.

[0074] The power conversion module 310 typically consists of multiple parts, including an inverter, a rectifier, and a controller. In practical applications, many electrical devices require alternating current (AC) to operate normally, such as common household appliances and industrial production equipment. The power conversion module 310 uses power electronics technology to convert direct current (DC) into AC that meets standard requirements, providing a stable and reliable power supply for these devices. When it is necessary to charge the battery packs, the power conversion module 310 can convert AC power supplied by an external power source (such as the power grid) back to DC power to store electrical energy in both the first and second battery packs.

[0075] The distribution box module 320 can be installed close to the bottom of the power conversion module 310 and is used to distribute the electrical energy output from the first battery pack and the second battery pack.

[0076] The distribution box module 320 is equipped with a series of electrical components such as switches, fuses, and circuit breakers. It can precisely distribute the power output from the first and second battery packs to different loads or circuits according to different power demands and equipment power requirements. For example, in an application scenario involving multiple electrical devices, the distribution box module 320 can dynamically adjust the power distribution based on device priority and real-time power demand, ensuring that each device receives an appropriate power supply while also guaranteeing the safe and stable operation of the entire system.

[0077] The charging module 330 can be installed close to the bottom of the power distribution box module 320, and is used to deliver the electrical energy provided by the external power source to the first battery pack and the second battery pack, thereby charging the first battery pack and the second battery pack.

[0078] The charging module 330 features intelligent charging management, monitoring the battery pack's status in real time, including parameters such as voltage, current, and temperature. Based on this monitoring data, the charging module 330 automatically adjusts the charging current and voltage, employing appropriate charging strategies such as constant current charging and constant voltage charging to ensure safe and efficient charging of the battery pack. Simultaneously, the charging module 330 prevents overcharging and over-discharging of the battery pack, extending its lifespan.

[0079] In this embodiment, the power conversion module 310, the distribution box module 320, and the charging module 330 are stacked sequentially from top to bottom above the first battery pack.

[0080] Preferably, the number of first battery modules 210 is configured such that the height between the top of the power conversion module 310 and the bottom of the first base 110 or the second base 120 is less than 2m.

[0081] The design, with a height of less than 2 meters, allows maintenance personnel to easily inspect components such as the power conversion module 310, distribution box module 320, and charging module 330. Maintenance personnel can directly observe the equipment's operating status, check instrument parameters, and inspect for loose connections, eliminating the need for extensive time and effort spent climbing to heights, thus improving the efficiency and accuracy of inspections.

[0082] When equipment malfunctions and requires repair, the lower height allows maintenance personnel to more easily access the faulty part. Whether replacing a battery module, inspecting the power conversion module 310, or troubleshooting electrical connections, these tasks can be performed under relatively safe and convenient conditions. This not only reduces maintenance time and costs but also lowers the safety risks associated with working at heights during maintenance.

[0083] The number of second battery modules 220 is greater than or equal to the number of first battery modules 210. For example, if there are four second battery modules 220 and two first battery modules 210, a total of six battery modules are connected in series, significantly increasing the energy storage capacity of the energy storage device 10. More battery modules mean more electrical energy can be stored, meeting higher energy storage demands. For example, in large-scale industrial energy storage or renewable energy power generation supporting energy storage scenarios, it can provide enterprises with more sufficient power reserves to cope with peak electricity demand or energy fluctuations.

[0084] In an alternative embodiment, the energy storage device 10 may further include a top cover module 340 that snaps onto the top of the second battery pack to protect the second battery pack.

[0085] In practical applications, the top cover module 340 can be designed to be compatible with the distribution box module 320, charging module 330, etc., thereby improving the versatility of the top cover module 340. This means that in the design and production process of the energy storage device 10, it is not necessary to design and manufacture special top covers for different modules, reducing the complexity of design and manufacturing and lowering production costs.

[0086] Therefore, those skilled in the art should recognize that although many exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications conforming to the principles of the present invention can be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and recognized as covering all such other variations or modifications.

Claims

1. An energy storage device, characterized in that, include: First base; The second base is arranged horizontally at intervals from the first base; The first battery pack includes multiple first battery modules, which are stacked vertically on the first base and connected in series in sequence. The second battery pack includes multiple second battery modules, which are stacked vertically in opposite directions on the second base and connected in series in sequence. as well as An electrical connector is used to connect the bottommost first battery module and the bottommost second battery module, thereby realizing the series connection between the first battery pack and the second battery pack.

2. The energy storage device according to claim 1, characterized in that, The first battery module has a first convex electrode at the top and a first concave electrode at the bottom. In two adjacent first battery modules, the first concave electrode of the upper first battery module and the first convex electrode of the lower first battery module are connected by plugging to achieve electrical conduction. The second battery module has a second concave electrode at the top and a second convex electrode at the bottom. In two adjacent second battery modules, the second convex electrode of the upper second battery module is inserted into and connected to the second concave electrode of the lower second battery module to achieve electrical conduction.

3. The energy storage device according to claim 2, characterized in that, The first base has a top convex pole, and the first concave pole of the first battery module located at the bottom is connected to the top convex pole of the first base to achieve electrical conduction. The second base has a top concave electrode, and the second convex electrode of the second battery module located at the bottom is connected to the top concave electrode of the second base to achieve electrical conduction. The electrical connector connects the first base and the second base, thereby connecting the bottommost first battery module and the bottommost second battery module.

4. The energy storage device according to claim 1, characterized in that, The first base and the second base have the same structure.

5. The energy storage device according to claim 1, characterized in that, Also includes: A power conversion module, located on top of the first battery pack, is used to convert the DC power output from the first and second battery packs into AC power, or to convert AC power from an external power source into DC power.

6. The energy storage device according to claim 5, characterized in that, Also includes: The power distribution box module is located at the bottom of the power conversion module and is used to distribute the electrical energy output by the first battery pack and the second battery pack.

7. The energy storage device according to claim 6, characterized in that, Also includes: The charging module is located at the bottom of the power distribution box module and is used to deliver electrical energy provided by an external power source to the first battery pack and the second battery pack, thereby charging the first battery pack and the second battery pack.

8. The energy storage device according to claim 5, characterized in that, The number of the first battery modules is configured such that the height between the top of the power conversion module and the bottom of the first base is less than 2m.

9. The energy storage device according to claim 5, characterized in that, The number of the second battery modules is greater than or equal to the number of the first battery modules.

10. The energy storage device according to claim 5, characterized in that, Also includes: A top cover module is fastened to the top of the second battery pack to protect the second battery pack.

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