Energy storage device

Abstract

The invention provides an energy storage device. The energy storage device comprises a box body, a plurality of battery clusters, a high-voltage control module and a cooling module, an accommodating cavity is formed in the box body; the battery clusters are sequentially arranged in a stacked mode in the height direction of the containing cavity, each battery cluster comprises a plurality of battery modules and a connecting assembly, the connecting assembly is electrically connected with the battery modules, and in each battery cluster, the edges of the two sides of the connecting assembly do not exceed the edges of the two sides of the battery modules; the high-voltage control modules are sequentially arranged in a stacked mode in the height direction of the containing cavity, and the multiple high-voltage control modules are electrically connected with the connecting assemblies of the multiple battery clusters in a one-to-one correspondence mode. The cooling module is installed on the box body, and at least part of the cooling module is located in the containing cavity. According to the energy storage device, safety risks such as short circuit caused by condensed water drops can be effectively reduced, faults such as short circuit of the high-voltage control module are avoided, and safe operation of the energy storage device is effectively guaranteed.

Description

Technical Field

[0001] This application relates to the field of energy storage devices, and more particularly to an energy storage device. Background Art

[0002] An energy storage container is a type of energy storage device, which has the characteristics of convenient installation and transportation, high integration, small floor area, and good scalability. It is an important part of the development of distributed energy, smart grid, and energy Internet in the energy storage field.

[0003] Currently, in existing energy storage devices, the battery modules in the battery cluster mostly adopt a stacked arrangement. Among them, the required connecting wires mostly adopt a centralized series connection method. After connecting each battery module in series, the wires are routed from the bottom of the energy storage device to the bottom high-voltage box or the high-voltage box on the side edge, which makes the connecting wires concentrated at the bottom of the box. To ensure that the battery modules of the energy storage device can work within a safe temperature range and avoid thermal runaway of the battery modules due to heat, a cooling module is provided in the energy storage device to cool the battery modules. However, since there is some water vapor in the air inside the energy storage device, the water vapor is likely to produce condensation when it encounters the surface of the battery module with a lower temperature. When there is more condensation, water droplets will drip from the surface of the battery module to the bottom of the energy storage device, which not only easily causes water accumulation, but also the connecting wires and the high-voltage control box are easily immersed in water for a long time, which is likely to cause a short circuit and even a safety accident. Summary of the Invention

[0004] In view of this, the embodiments of this application are committed to providing an energy storage device to solve the problem that short circuits may occur in the connecting wires and the high-voltage control box due to water droplet condensation in the existing energy storage devices.

[0005] On the one hand, this application provides an energy storage device, including:

[0006] A box body, which forms an accommodation cavity inside;

[0007] A plurality of battery clusters, each of the battery clusters is sequentially stacked along the height direction of the accommodation cavity. Among them, each battery cluster includes a plurality of battery modules and a connection component. The connection component electrically connects the plurality of battery modules, and in each battery cluster, the two side edges of the connection component do not exceed the two side edges of the battery module;

[0008] A high-voltage control module, each of the high-voltage control modules is sequentially stacked along the height direction of the accommodation cavity, and the plurality of high-voltage control modules are electrically connected to the connection components of the plurality of battery clusters in one-to-one correspondence;

[0009] A cooling module, installed on the box body, and at least part of the cooling module is located inside the accommodation cavity;

[0010] Among them, in the orthographic projection in the height direction of the accommodation cavity, the multiple high-voltage control modules and the multiple battery clusters do not overlap with each other.

[0011] In an embodiment of the present application, in the orthographic projection in the height direction of the accommodation cavity, the projection of the connection component and the projection of the battery module do not overlap with each other.

[0012] In an embodiment of the present application, along the width direction of the accommodation cavity, the positive output terminal and the negative output terminal of the battery module are located on the same side, and the output terminals of adjacent battery modules are arranged oppositely.

[0013] In an embodiment of the present application, the battery module includes the positive output terminal, the negative output terminal, the battery cell and the package body. The battery cell is arranged in the package body, the positive output terminal and the negative output terminal are respectively electrically connected to the battery cell, and both are movably arranged on the package body.

[0014] In an embodiment of the present application, a partition is arranged in the accommodation cavity. The partition divides the accommodation cavity into a high-voltage cavity and a battery cavity. The high-voltage control module is arranged in the high-voltage cavity, and the battery cluster is arranged in the battery cavity;

[0015] Among them, the high-voltage cavity is a sealed cavity, and a plurality of first installation positions are arranged along the height direction. The high-voltage control modules are arranged in a stacked manner on the plurality of first installation positions.

[0016] In an embodiment of the present application, a plurality of battery installation layers are arranged along the height direction in the battery cavity, and each battery installation layer is provided with a plurality of second installation positions; each of the first installation positions and each of the battery installation layers are at the same horizontal height;

[0017] The battery cluster is divided into a first battery cluster and a second battery cluster;

[0018] Each battery module of the first battery cluster is arranged in the second installation positions within the same battery installation layer, and the high-voltage control module electrically connected to the first battery cluster is located in the corresponding second installation positions of the battery installation layer where the first battery cluster is located;

[0019] Each battery module of the second battery cluster is arranged in the second installation positions within at least two adjacent battery installation layers in the height direction, and the high-voltage control module electrically connected to the second battery cluster is located in the corresponding second installation positions of any battery installation layer where the second battery cluster is located.

[0020] In an embodiment of the present application, two partition plates are provided. The two partition plates are respectively arranged on the horizontal two sides of the battery cavity to divide the accommodating cavity into the battery cavity, a first high-voltage cavity and a second high-voltage cavity which are respectively located on the two sides of the battery cavity;

[0021] Each of the high-voltage control modules electrically connected to the first battery cluster is arranged in a stacked manner on the first installation position of the first high-voltage cavity;

[0022] Each of the high-voltage control modules electrically connected to the second battery cluster is arranged in a stacked manner on the second installation position of the second high-voltage cavity.

[0023] In an embodiment of the present application, the partition plate includes an insulating and heat-insulating plate body; or,

[0024] The partition plate includes insulating plate bodies on both sides and an adiabatic filling layer filled between the two insulating plate bodies.

[0025] In an embodiment of the present application, clamping portions protruding from the end faces are provided at both ends of the battery module; longitudinal beams extending in the vertical direction and fixed guide rails arranged on the longitudinal beams are provided in the battery cavity, and clamping grooves matching the clamping portions are arranged on the fixed guide rails; the clamping portions at both ends of the battery module are respectively clamped in the clamping grooves of the two fixed guide rails.

[0026] And / or, clamping grooves are provided on the end faces at both ends of the battery module; longitudinal beams extending in the vertical direction and fixed guide rails arranged on the longitudinal beams are provided in the battery cavity, and clamping portions matching the clamping grooves are arranged on the fixed guide rails; and the clamping grooves of the two relatively arranged fixed guide rails are respectively clamped in the clamping grooves at both ends of the battery module;

[0027] A limiting plate protruding outwards is provided on the side of the battery module, and the limiting plate abuts against the fixed guide rail when the battery module is clamped on the fixed guide rail.

[0028] In an embodiment of the present application, the connection assembly is a connection wire harness or a connection wire row;

[0029] Connection terminals are respectively provided at both ends of the connection wire harness, and the connection terminals are electrically connected to the positive output terminal, the negative output terminal of the battery module or the high-voltage control module;

[0030] At least two connection sockets are provided on the connection wire row, and the connection sockets are electrically connected to the positive output terminal, the negative output terminal of the battery module or the high-voltage control module.

[0031] Compared with the existing devices, in the energy storage device of the present application, by stacking the battery clusters in sequence along the height direction of the accommodation cavity, and in each battery cluster, the two side edges of the connection component do not exceed the two side edges of the battery module, the concentrated distribution of the connection component can be effectively avoided, and the situation where the connection component is immersed in the condensed water generated by the battery module will not occur, effectively reducing the safety risks such as short circuits caused by condensed water droplets; the multiple high-voltage control modules are connected to the multiple battery clusters in one-to-one correspondence, which can reduce the required length of the connection component and also reduce the safety risks caused by the connection component; and, since the multiple high-voltage control modules and the multiple battery clusters do not overlap within the orthographic projection in the height direction of the accommodation cavity, the condensed water droplets generated on the battery module can be effectively prevented from falling near the high-voltage control module, thereby effectively preventing faults such as short circuits of the high-voltage control module and effectively ensuring the safe operation of the energy storage device of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 FIG. shows a top view of the energy storage device of the present application;

[0033] Figure 2 FIG. shows a front view of the energy storage device of the present application;

[0034] Figure 3 FIG. shows a schematic structural diagram of another top view of the energy storage device of the present application;

[0035] Figure 4 FIG. shows a schematic structural diagram of another front view of the energy storage device of the present application;

[0036] Figure 5 FIG. shows a partial structural schematic diagram of the battery module of the energy storage device of the present application being clamped on the fixed guide rail.

[0037] REFERENCE SIGNS:

[0038] 10, box body; 11, accommodation cavity; 111, high-voltage cavity; 1111, first high-voltage cavity; 1112, second high-voltage cavity; 113, battery cavity; 1141, longitudinal beam; 1142, fixed guide rail; 1143, clamping groove; 12, partition; 20, battery cluster; 21, battery module; 211, positive output terminal; 212, negative output terminal; 214, package; 215, clamping portion; 216, limiting plate; 22, connection component; 23, first battery cluster; 24, second battery cluster; 30, high-voltage control module; 40, cooling module. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0039] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without making creative efforts shall fall within the scope of protection of the present application.

[0040] It should be noted that: unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and values set forth in these embodiments do not limit the scope of the present application. In all the examples shown and discussed here, any specific value should be construed as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values.

[0041] Many specific details are set forth in the following description in order to provide a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the connotation of the present application. Therefore, the present application is not limited by the specific implementations disclosed below. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and devices should be regarded as part of the specification.

[0042] The terms used in one or more embodiments of the present application are for the purpose of describing specific embodiments only and are not intended to limit one or more embodiments of the present application. The singular forms "a", "the", and "said" used in one or more embodiments of the present application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used in one or more embodiments of the present application refers to and includes any or all possible combinations of one or more of the associated listed items.

[0043] It should be understood that although the terms first, second, etc. may be used in one or more embodiments of the present application to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of one or more embodiments of the present application, the first may also be referred to as the second, and similarly, the second may also be referred to as the first. Depending on the context, the word "if" as used herein may be interpreted as "when" or "while" or "in response to a determination". In this article, "up", "down", "front", "back", "left", "right", etc. are only used to represent the relative positional relationship between relevant parts, rather than defining the absolute positions of these relevant parts. In this article, "equal", "same", etc. are not strict mathematical and / or geometric limitations, and also include errors that can be understood by those skilled in the art and are allowed in manufacturing or using, etc. Unless otherwise specified, the numerical ranges in this article include not only the entire range within its two endpoints, but also several sub-ranges included therein.

[0044] The following refers to Figures 1 to 5 and, in combination with an embodiment, details the specific structure and working principle of the energy storage device of the present application.

[0045] As Figures 1 to 4 shown, the present application provides an energy storage device, including a box body 10, a plurality of battery clusters 20, a high-voltage control module 30, and a cooling module 40. Among them, an accommodation cavity 11 is formed inside the box body 10, and the accommodation cavity 11 is used to accommodate various devices required for the energy storage device such as the battery clusters 20, the high-voltage control module 30, and the cooling device.

[0046] As Figure 1 and Figure 3 shown, a plurality of battery clusters 20 are provided in the energy storage device of the present application. Each battery cluster 20 includes a plurality of battery modules 21 and a connection component 22. The connection component 22 is electrically connected to the plurality of battery modules 21, so that the battery cluster 20 can form an assembly that can supply power independently outward. A plurality of high-voltage control modules 30 are electrically connected to the connection components 22 of the plurality of battery clusters 20 one by one. The high-voltage control module 30 has various functions, mainly used to ensure the normal power supply outward of the battery cluster 20 by controlling the on / off of the main circuit of the battery cluster 20. The high-voltage control module 30 can also collect data such as the voltage, current, and temperature of each battery module 21 in the battery cluster 20, so as to monitor the battery state in real time and be able to cut off the circuit in a timely manner in case of an abnormality to protect the system safety.

[0047] The cooling module 40 is installed on the box body 10, and at least part of the cooling module 40 is located in the accommodation cavity 11. The cooling module 40 can be an air-cooled cooling module 40 such as an air conditioner that can provide cold air, or a liquid-cooled cooling module 40 such as a liquid-cooled plate, which is not limited herein.

[0048] As Figure 2 and Figure 4 shown, each battery cluster 20 is stacked in sequence along the height direction of the accommodation cavity 11, and in each battery cluster 20, the two side edges of the connection assembly 22 do not exceed the two side edges of the battery module 21; each high-voltage control module 30 is stacked in sequence along the height direction of the accommodation cavity 11, the cooling module 40 is installed on the box body 10, and at least part of the cooling module 40 is located in the accommodation cavity 11. Among them, in the orthographic projection in the height direction of the accommodation cavity 11, the multiple high-voltage control modules 30 and the multiple battery clusters 20 do not overlap each other.

[0049] Compared with the existing device, in the energy storage device of the present application, by stacking each battery cluster 20 in sequence along the height direction of the accommodation cavity 11, and in each battery cluster 20, the two side edges of the connection assembly 22 do not exceed the two side edges of the battery module 21, the concentrated distribution of the connection assembly 22 can be effectively avoided, and the situation that the connection assembly 22 is immersed in the condensed water generated by the battery module 21 will not occur, effectively reducing safety risks such as short circuits caused by condensed water droplets; the multiple high-voltage control modules 30 are connected to the multiple battery clusters 20 in one-to-one correspondence, which can reduce the required length of the connection assembly 22 and also reduce the safety risks caused by the connection assembly 22; and, since in the orthographic projection in the height direction of the accommodation cavity 11, the multiple high-voltage control modules 30 and the multiple battery clusters 20 do not overlap each other, the condensed water droplets generated on the battery module 21 can be effectively prevented from falling near the high-voltage control module 30, thereby effectively avoiding faults such as short circuits of the high-voltage control module 30 and effectively ensuring the safe operation of the energy storage device of the present application.

[0050] Among them, as Figure 4 shown, when each high-voltage control module 30 is electrically connected to the connection assembly 22 of the corresponding battery cluster 20 in one-to-one correspondence, it is preferable to select the high-voltage control module 30 to be electrically connected to the battery cluster 20 within the same horizontal height range. In this way, the extended length of the connection assembly 22 required between the high-voltage control module 30 and the battery module 21 of the battery cluster 20 can be effectively shortened, thereby effectively saving the required cost of the connection assembly 22, and the overall structure is more concise, facilitating installation and later maintenance.

[0051] Furthermore, as Figure 3 shown, in an embodiment of the present application, in the orthographic projection in the height direction of the accommodation cavity 11, the projection of the connection assembly 22 does not overlap with the projection of the battery module 21. Since the projection of the connection assembly 22 does not overlap with the projection of the battery module 21, the water droplets formed on the surface of the battery module 21 can be further effectively prevented from falling onto the connection assembly 22, thereby further reducing the faults or safety risks caused by the connection assembly 22 being exposed to water on the surface.

[0052] As Figure 1and Figure 3 As shown in Figure 3 , in an embodiment of the present application, along the width direction of the accommodation cavity 11, the positive output terminal 211 and the negative output terminal 212 of the battery module 21 are located on the same side, and the output terminals of adjacent battery modules 21 are arranged oppositely. Since the positive output terminal 211 and the negative output terminal 212 of the battery module 21 are located on the same side along the width direction of the accommodation cavity 11, and the output terminals of adjacent battery modules 21 are arranged oppositely, when the battery module 21 is electrically connected to an adjacent battery module 21, only a connecting component 22 with a shorter length needs to be provided, so that the positive output terminal 211 of any battery module 21 can be electrically connected to the negative output terminal 212 of another battery module 21. Thus, the extension length of the connecting component 22 can be greatly saved, which can not only effectively reduce the required cost of the connecting component 22, but also facilitate installation and later maintenance.

[0053] Specifically, in an embodiment of the present application, the battery module 21 includes a positive output terminal 211, a negative output terminal 212, a battery cell, and a package 214. The battery cell is disposed in the package 214. The positive output terminal 211 and the negative output terminal 212 are respectively electrically connected to the battery cell and are both movably disposed on the package 214.

[0054] Since the positive output terminal 211 and the negative output terminal 212 are respectively electrically connected to the battery cell and are both movably disposed on the package 214, in this way, the positions of the positive output terminal 211 and the negative output terminal 212 can be flexibly adjusted as needed. When the battery module 21 is adjacent to another battery module 21, the positions of the output terminals to be electrically connected to each other can be adjusted to a facing position, thereby further shortening the required length of the connecting component 22 when the battery module 21 is electrically connected to an adjacent battery module 21.

[0055] It can be understood that there are various ways for the positive output terminal 211 and the negative output terminal 212 to be movably disposed on the package 214.

[0056] For example, guide rails or similar devices can be provided on the side surface of the package 214, and the positive output terminal 211 and the negative output terminal 212 can slide on the guide rails, or a combination scheme of a flexible copper bar plus buffer materials such as springs and / or bellows can be adopted between the positive / negative output terminals and the package; so that when the battery module is electrically connected to the connecting component, the positive / negative output terminals can have a certain displacement space in all directions, which can not only avoid the situation that the positive / negative output terminals cannot be accurately aligned with the ports on the connecting component due to displacement deviation during the installation of the battery module 21, improving the installation accuracy and efficiency, but also form a buffer structure to avoid hard collision damage between the positive / negative output terminals and the connecting component, extending the service life of the energy storage device.

[0057] Inside the package body 214, the positive output terminal 211 and the negative output terminal 212 are respectively electrically connected to the battery cell through relatively flexible wires. Of course, the positive output terminal 211 and the negative output terminal 212 can also be movably arranged on the package body 214 in other ways, which will not be elaborated here.

[0058] Furthermore, as Figure 2 and Figure 4 shown, in an embodiment of the present application, a partition 12 is provided in the accommodation cavity 11. The partition 12 divides the accommodation cavity 11 into a high-voltage cavity 111 and a battery cavity 113. The high-voltage control module 30 is arranged in the high-voltage cavity 111, and the battery cluster 20 is arranged in the battery cavity 113. The high-voltage cavity 111 is a sealed cavity, and a plurality of first mounting positions are arranged along the height direction. The high-voltage control modules 30 are arranged in a stacked manner on the plurality of first mounting positions in sequence.

[0059] Since the partition 12 divides the accommodation cavity 11 into a high-voltage cavity 111 and a battery cavity 113, the high-voltage control module 30 is arranged in the high-voltage cavity 111, and the battery cluster 20 is arranged in the battery cavity 113, and the high-voltage cavity 111 is a sealed cavity. In this way, even when the air humidity in the battery cavity 113 where the battery module 21 is located is relatively high, and there is water mist or a large amount of condensed water formed inside, it will not affect the normal operation of the high-voltage control module 30 in the high-voltage cavity 111. Moreover, since a plurality of first mounting positions are arranged along the height direction in the high-voltage cavity 111, and the high-voltage control modules 30 are arranged in a stacked manner on the plurality of first mounting positions in sequence, it is convenient for the high-voltage control module 30 to be electrically connected to the battery cluster 20 within the same horizontal height range, effectively shortening the connection length of the connection component 22 required between the high-voltage control module 30 and the battery cluster 20 of the battery module 21.

[0060] Specifically, for the electrical connection between the high-voltage control module 30 in the high-voltage cavity 111 and the battery cluster 20 in the battery cavity 113, the structure of plug-in terminals plus cables can also be adopted. Among them, a sealing structure is provided between the plug-in terminals and the partition 12; that is, plug-in terminals that are electrically connected to each other are arranged on the surfaces of the partition 12 in the two compartments, and the two plug-in terminals are respectively connected to the high-voltage control module 30 and the battery cluster 20 through cables.

[0061] In this way, not only can the insulation between the two compartments be ensured, but the cables can also avoid the hard connection among the high-voltage control module 30, the battery cluster 20, and the partition 12, improving the anti-impact ability of the energy storage device. And since the cables between the partition 12 and the battery cluster 20 do not overlap with the battery cluster 20 in the height direction of the accommodation cavity, it also avoids the condensed water dripping on the battery cluster 20.

[0062] As described above, the battery clusters 20 are sequentially stacked along the height direction of the accommodation cavity 11. Specifically, in an embodiment of the present application, a plurality of battery installation layers are provided in the battery cavity 113 along the height direction, and each battery installation layer is provided with a plurality of second installation positions; each of the first installation positions and each battery installation layer are at the same horizontal height; the battery clusters 20 are divided into a first battery cluster 23 and a second battery cluster 24; each battery module 21 of the first battery cluster 23 is arranged in the second installation positions within the same battery installation layer, and the high-voltage control module 30 electrically connected to the first battery cluster 23 is located in the corresponding second installation position of the battery installation layer where the first battery cluster 23 is located; each battery module 21 of the second battery cluster 24 is arranged in the second installation positions within at least two adjacent battery installation layers in the height direction, and the high-voltage control module 30 electrically connected to the second battery cluster 24 is located in the corresponding second installation position of any battery installation layer where the second battery cluster 24 is located.

[0063] It should be noted that in the embodiment of the present application, when it is mentioned that each of the first installation positions and each battery installation layer are at the same horizontal height, it means that they are approximately close to each other in the height direction to reduce the length of the cable. However, due to errors in process assembly, etc., it is not the same horizontal height in terms of absolute numerical values. In the embodiment of the present application, an error of 10 cm - 20 cm between the two is allowed, and they should all be regarded as within the same horizontal height range.

[0064] Since each battery module 21 of the first battery cluster 23 is arranged in the second installation positions within the same battery installation layer, and the high-voltage control module 30 electrically connected to the first battery cluster 23 is located in the corresponding second installation position of the battery installation layer where the first battery cluster 23 is located, that is, the first battery cluster 23 and the high-voltage control module 30 electrically connected to it are at the same horizontal height, the extension length of the required connection components 22 between the battery modules 21 within the first battery cluster 23 and between the first battery cluster 23 and the high-voltage control module 30 electrically connected to it can be shortened, and it can also ensure that the required connection components 22 and the connection components 22 are at the same horizontal height, without the connection components 22 extending up and down along the height direction.

[0065] Similarly, since each battery module 21 of the second battery cluster 24 is disposed in a second mounting position within at least two battery mounting layers adjacent in the height direction, the high-voltage control module 30 electrically connected to the second battery cluster 24 is located in the corresponding second mounting position of any battery mounting layer where the second battery cluster 24 is located. That is, the second battery cluster 24 and the high-voltage control module 30 electrically connected thereto are within the same horizontal height range, which can shorten the extension length of the required connection components 22 between the battery modules 21 in the second battery cluster 24 and between the second battery cluster 24 and the high-voltage control module 30 electrically connected thereto. Moreover, it can also ensure that the required connection components 22 and the connection components 22 thereto are within the same horizontal height range, without the need for the connection components 22 to extend vertically in the height direction. Compared with the first battery cluster 23, the second battery cluster 24 needs to occupy at least two battery mounting layers adjacent in the height direction, and the required space in the height direction is relatively large, but the required area in the horizontal direction can be correspondingly reduced.

[0066] It can be understood that, as Figure 4 shown, each battery module 21 of the second battery cluster 24 can be disposed in a second mounting position within two battery mounting layers adjacent in the height direction, or can be disposed in a second mounting position within three or more battery mounting layers adjacent in the height direction, which is not limited herein.

[0067] Furthermore, as Figure 2 and Figure 4 shown, in an embodiment of the present application, two partition plates 12 are provided, and the two partition plates 12 are respectively disposed on the horizontal sides of the battery cavity 113 to divide the accommodation cavity 11 into a battery cavity 113 and a first high-voltage cavity 1111 and a second high-voltage cavity 1112 respectively located on both sides of the battery cavity 113; the high-voltage control modules 30 electrically connected to the first battery cluster 23 are sequentially stacked and arranged in the first mounting position of the first high-voltage cavity 1111; the high-voltage control modules 30 electrically connected to the second battery cluster 24 are sequentially stacked and arranged in the second mounting position of the second high-voltage cavity 1112.

[0068] It can be understood that since each battery module 21 of the first battery cluster 23 is disposed in a second mounting position within the same battery mounting layer, and the high-voltage control module 30 electrically connected to the first battery cluster 23 is located in the corresponding second mounting position of the battery mounting layer where the first battery cluster 23 is located, therefore, in the first high-voltage cavity 1111, a high-voltage control module 30 is disposed in each second mounting position, thereby effectively saving the internal space of the first high-voltage cavity 1111.

[0069] Each battery module 21 of the second battery cluster 24 is disposed in a second installation position within at least two battery installation layers adjacent in the height direction, and the respective high-voltage control modules 30 electrically connected to the second battery cluster 24 are arranged in a stacked manner on the second installation positions in the second high-voltage chamber 1112. Therefore, only some of the second installation positions in the second high-voltage chamber 1112 are provided with high-voltage control modules 30, which enables the second high-voltage chamber 1112 to have more redundant space, which can be used to accommodate other components such as a heat exchange module. Moreover, due to the first high-voltage chamber 1111 and the second high-voltage chamber 1112, it is beneficial to the heat dissipation of the internal modules in the high-voltage chamber 111.

[0070] The structure of the partition 12 can be selected as needed. For example, in an embodiment of the present application, the partition 12 includes an insulating and heat-insulating plate body. The insulating and heat-insulating plate body can not only effectively block the heat transfer between the battery chamber 113 and the high-voltage chamber 111, ensure that both the battery module 21 and the high-voltage control module 30 operate within a safe and stable operating range, prevent the high-voltage control module 30 from malfunctioning or causing a fire due to high temperature, and at the same time prevent the heat generated by the malfunction of the high-voltage control module 30 from being transferred to the battery module 21 to avoid the spread of thermal runaway of the battery module 21; it can also effectively prevent electrical breakdown between the high-voltage equipment and the battery module 21, reduce the risk of electric leakage, and ensure the safe operation of the entire energy storage device.

[0071] Specifically, the insulating and heat-insulating plate body can be at least one of expanded polystyrene (EPS), extruded polystyrene (XPS), rigid polyurethane (PUR), or polyisocyanurate (PIR).

[0072] In another embodiment of the present application, the partition 12 includes insulating plate bodies on both sides and an adiabatic filling layer filled between the two insulating plate bodies. That is, the insulating plate bodies mainly play the role of preventing electrical breakdown between the high-voltage equipment and the battery module 21, and the adiabatic filling layer ensures the blocking of heat transfer between the battery chamber 113 and the high-voltage chamber 111, ensuring that both the battery module 21 and the high-voltage control module 30 operate within a safe and stable operating range. Compared with the integral structure, the split structure of the partition 12 can effectively reduce the overall structure cost.

[0073] Specifically, the insulating plate body can be at least one of calcium silicate board, aerogel board, ceramic fiber board, expanded polystyrene (EPS), extruded polystyrene (XPS), rigid polyurethane (PUR), or polyisocyanurate (PIR); the adiabatic filling layer can be rock wool (basalt fiber) or glass wool (glass fiber), etc.

[0074] Such as Figure 5As shown, in an embodiment of the present application, clamping portions 215 protruding from the end faces are provided at both ends of the battery module 21; in the battery cavity 113, there are vertical beams 1141 extending in the vertical direction and fixing guide rails 1142 arranged on the vertical beams 1141, and clamping grooves 1143 matching the clamping portions 215 are provided on the fixing guide rails 1142; the clamping portions 215 at both ends of the battery module 21 are respectively clamped in the clamping grooves 1143 of the two fixing guide rails 1142.

[0075] By providing the clamping portions 215 protruding from the end faces at both ends of the battery module 21, the clamping portions 215 can be clamped in the clamping grooves 1143 of the fixing guide rails 1142. In this way, the fixing guide rails 1142 at both ends of the battery module 21 can support the two edges of the battery module 21, so that the battery module 21 can be installed in the battery cavity 113, and gaps are formed between the upper and lower battery modules 21, which is convenient for the battery module 21 to dissipate heat, and the cold air formed by the cooling module 40 can effectively reach the upper and lower surfaces of the battery module 21, so as to fully dissipate heat from the battery module 21.

[0076] Similarly, in another embodiment of the present application, clamping grooves 1143 are provided on the end faces at both ends of the battery module 21; in the battery cavity 113, there are vertical beams 1141 extending in the vertical direction and fixing guide rails 1142 arranged on the vertical beams 1141, and clamping portions 215 matching the clamping grooves 1143 are provided on the fixing guide rails 1142; and the clamping grooves 1143 of the two relatively arranged fixing guide rails 1142 are respectively clamped in the clamping grooves 1143 at both ends of the battery module 21. The principle of clamping and fixing can refer to the above structural principle and will not be elaborated here.

[0077] As Figure 5 shown, in an embodiment of the present application, a limiting plate 216 protruding outward is provided on the side of the battery module 21, and the limiting plate 216 abuts against the fixing guide rail 1142 when the battery module 21 is clamped on the fixing guide rail 1142. In this way, during the installation process of the battery module 21, when the battery module 21 is clamped on the fixing guide rail 1142 and is fully installed in place, the limiting plate 216 can abut against the fixing guide rail 1142, so as to ensure that the battery module 21 can be installed at a predetermined position and prevent the battery module 21 from colliding with the box body 10 during the installation process.

[0078] It can be understood that the connection assembly 22 is mainly used to connect the battery module 21 and the high-voltage control module 30, and it can have various forms. Specifically, as Figure 3 shown, in an embodiment of the present application, the connection assembly 22 can be a connection wire harness; connection terminals are respectively provided at both ends of the connection wire harness, and the connection terminals are electrically connected to the positive output terminal 211, the negative output terminal 212 of the battery module 21 or the high-voltage control module 30.

[0079] In another embodiment of the present application, the connection component 22 may be a connection cable row; at least two connection sockets are provided on the connection cable row, and the connection sockets are electrically connected to the positive output terminal 211, the negative output terminal 212 of the battery module 21 or the high-voltage control module 30. The structure of the connection cable row may refer to the existing connection cable row structure and will not be elaborated herein.

[0080] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, etc. made within the spirit and principles of the present application shall be included within the protection scope of the present application. Many modifications and changes are obvious to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The choice of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to technologies in the market, or to enable other ordinary skill in the art to understand the embodiments disclosed herein. The scope of the present application is defined by the appended claims.

Claims

1. An energy storage device, characterized in that, Comprising: A box body (10) with an accommodation cavity (11) formed inside; A plurality of battery clusters (20), each of the battery clusters (20) being stacked in sequence along the height direction of the accommodation cavity (11). Among them, each battery cluster (20) includes a plurality of battery modules (21) and a connection component (22). The connection component (22) electrically connects the plurality of battery modules (21), and in each battery cluster (20), the two side edges of the connection component (22) do not exceed the two side edges of the battery module (21); High-voltage control modules (30), each of the high-voltage control modules (30) being stacked in sequence along the height direction of the accommodation cavity (11), and the plurality of high-voltage control modules (30) are electrically connected to the connection components (22) of the plurality of battery clusters (20) in a one-to-one correspondence; A cooling module (40), mounted on the box body (10), and at least part of the cooling module (40) is located inside the accommodation cavity (11); Wherein, in the orthographic projection in the height direction of the accommodation cavity (11), the plurality of high-voltage control modules (30) and the plurality of battery clusters (20) do not overlap each other.

2. The energy storage device according to claim 1, wherein In the orthographic projection in the height direction of the accommodation cavity (11), the projection of the connection component (22) and the projection of the battery module (21) do not overlap each other.

3. The energy storage device according to claim 1, characterized in that, Along the width direction of the accommodation cavity (11), the positive output terminal (211) and the negative output terminal (212) of the battery module (21) are located on the same side, and the output terminals of adjacent battery modules (21) are arranged oppositely.

4. The energy storage device according to claim 3, wherein The battery module (21) includes the positive output terminal (211), the negative output terminal (212), battery cells and a package body (214), and the battery cells are arranged inside the package body (214); The positive output terminal (211) and the negative output terminal (212) are respectively electrically connected to the battery cells and are both movably arranged on the package body (214).

5. The energy storage device according to claim 1, characterized in that, A partition (12) is arranged in the accommodation cavity (11), and the partition (12) divides the accommodation cavity (11) into a high-voltage cavity (111) and a battery cavity (113). The high-voltage control module (30) is arranged in the high-voltage cavity (111), and the battery cluster (20) is arranged in the battery cavity (113); Wherein, the high-voltage cavity (111) is a closed cavity, and a plurality of first installation positions are arranged along the height direction, and the high-voltage control modules (30) are stacked in sequence on the plurality of first installation positions.

6. The energy storage device according to claim 5, wherein, A plurality of battery installation layers are arranged along the height direction in the battery cavity (113), and each battery installation layer is provided with a plurality of second installation positions; each of the first installation positions and each of the battery installation layers are at the same horizontal height; The battery cluster (20) is divided into a first battery cluster (23) and a second battery cluster (24); Each of the battery modules (21) of the first battery cluster (23) is disposed in a second installation position within the same battery installation layer, and the high-voltage control module (30) electrically connected to the first battery cluster (23) is located within the corresponding second installation position of the battery installation layer where the first battery cluster (23) is located; Each of the battery modules (21) of the second battery cluster (24) is disposed in second installation positions within at least two battery installation layers adjacent in the height direction, and the high-voltage control module (30) electrically connected to the second battery cluster (24) is located within the corresponding second installation position of any one of the battery installation layers where the second battery cluster (24) is located.

7. The energy storage device according to claim 6, characterized in that, There are two partition plates (12), and the two partition plates (12) are respectively disposed on the horizontal two sides of the battery chamber (113) to divide the accommodating chamber (11) into the battery chamber (113) and a first high-voltage chamber (1111) and a second high-voltage chamber (1112) respectively located on both sides of the battery chamber (113); Each of the high-voltage control modules (30) electrically connected to the first battery cluster (23) is arranged in a stacked manner in the first installation position of the first high-voltage chamber (1111); Each of the high-voltage control modules (30) electrically connected to the second battery cluster (24) is arranged in a stacked manner in the second installation position of the second high-voltage chamber (1112).

8. The energy storage device according to claim 7, characterized in that, The partition plate (12) includes an insulating and heat-insulating plate body; or, The partition plate (12) includes insulating plate bodies on both sides and an adiabatic filling layer filled between the two insulating plate bodies.

9. The energy storage device according to claim 6, wherein Both ends of the battery module (21) are provided with clamping portions (215) protruding from the end faces; a longitudinal beam (1141) extending in the vertical direction and a fixed guide rail (1142) disposed on the longitudinal beam (1141) are provided in the battery chamber (113), and a clamping groove (1143) matching the clamping portion (215) is provided on the fixed guide rail (1142); the clamping portions (215) at both ends of the battery module (21) are respectively clamped in the clamping grooves (1143) of the two fixed guide rails (1142); And / or, clamping grooves (1143) are provided on the end faces at both ends of the battery module (21); a longitudinal beam (1141) extending in the vertical direction and a fixed guide rail (1142) disposed on the longitudinal beam (1141) are provided in the battery chamber (113), and a clamping portion (215) matching the clamping groove (1143) is provided on the fixed guide rail (1142); and the clamping grooves (1143) of the two oppositely arranged fixed guide rails (1142) are respectively clamped in the clamping grooves (1143) at both ends of the battery module (21); A limiting plate (216) protruding outward is provided on the side of the battery module (21), and the limiting plate (216) abuts against the fixed guide rail (1142) when the battery module (21) is clamped on the fixed guide rail (1142).

10. The energy storage device according to any one of claims 1 to 9, characterized in that, The connection assembly (22) is a connection wire harness or a connection wire row; Connection terminals are respectively arranged at both ends of the connection wire harness, and the connection terminals are electrically connected to the positive output terminal (211), the negative output terminal (212) of the battery module (21) or the high-voltage control module (30); At least two connection sockets are arranged on the connection busbar, and the connection sockets are electrically connected to the positive output terminal (211), the negative output terminal (212) of the battery module (21) or the high-voltage control module (30).

Images