Energy storage system

Abstract

The invention provides an energy storage system, which comprises a battery stack, the battery stack comprises at least two battery layers, the at least two battery layers are stacked along a first direction, each battery layer comprises at least two batteries, and the at least two batteries are arranged along a second direction; the two batteries adjacently arranged along the first direction are at least partially overlapped and at least partially staggered in the second direction; wherein the first direction is perpendicular to the second direction. The maintainability of the energy storage system provided by the invention is relatively good.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more particularly to an energy storage system. Background Technology

[0002] An energy storage cabinet is a device used to store electrical energy. It is commonly used in power systems to improve energy efficiency, stabilize the power grid, and support the integration of renewable energy. Energy storage cabinets can store electrical energy when electricity demand is low and release it when demand is high, thereby balancing supply and demand.

[0003] An energy storage cabinet may include a cabinet body and multiple battery cells integrated within the cabinet body. Multiple battery cells are arranged horizontally to form a layer of battery cells, and multiple layers of battery cells are stacked vertically to form a battery cell stack. When any battery cell in the battery cell stack malfunctions, it is necessary to remove a large number of other normal battery cells to take out the malfunctioning battery cell. After replacing the malfunctioning battery cell with a normal battery cell, it is then reinstalled together with the other normal battery cells that have been taken out. This reduces the processing efficiency of malfunctioning battery cells. Summary of the Invention

[0004] Based on this, this application provides an energy storage system to solve the problem of low processing efficiency of abnormal battery cells in related technologies.

[0005] The energy storage system provided in this application embodiment includes:

[0006] A battery stack, comprising at least two battery layers stacked along a first direction, each battery layer comprising at least two batteries arranged along a second direction;

[0007] Two batteries arranged adjacent to each other along the first direction shall at least partially overlap and at least partially offset;

[0008] The first direction is perpendicular to the second direction.

[0009] In one possible implementation, at least two battery layers are aligned at one end along a third direction, and at least two battery layers are aligned at the other end along a third direction.

[0010] Among them, the first direction, the second direction, and the third direction are all perpendicular to each other.

[0011] In one possible implementation, the battery layer includes a first battery layer and a second battery layer, with at least two of each first battery layer and at least two second battery layers, and the at least two first battery layers and at least two second battery layers are alternately arranged along a first direction.

[0012] The number of batteries in each first battery layer is the same, and each first battery layer is aligned at one end along the second direction and at the other end along the second direction.

[0013] The number of batteries in each second battery layer is the same, and each second battery layer is aligned at one end along the second direction and at the other end along the second direction.

[0014] In one possible implementation, along a first direction, the orthographic projection of one of the first battery layer and the second battery layer overlaps the orthographic projection of the other.

[0015] In one possible implementation, along a first direction, the orthographic projections of the first battery layer and the second battery layer partially overlap, while the orthographic projections of the first battery layer and the second battery layer are offset.

[0016] In one possible implementation, the number of cells in each battery layer gradually decreases along the first direction.

[0017] In one possible implementation, the energy storage system also includes at least four unlocking devices, each corresponding to a cell in the battery stack, and the unlocking devices are located at one end of the cell along a third direction.

[0018] The unlocking component has a driving part that moves toward the battery to drive the battery to move away from the unlocking component.

[0019] In one possible implementation, the energy storage system further includes an integrated board, which includes a substrate and at least four first interfaces. The first interfaces are disposed on the substrate and are electrically connected to each other. Each battery in the battery stack is electrically connected to a corresponding first interface.

[0020] At least four unlocking components are fixedly connected to the base plate.

[0021] In one possible implementation, the energy storage system further includes a thermal management subsystem, and the integrated board further includes at least four second interfaces. The second interfaces are disposed on the substrate and are electrically connected to each battery in the battery stack. The thermal management subsystem is electrically connected to the second interfaces.

[0022] The thermal management subsystem is configured to control the drive unit to move the battery away from the substrate when the battery's electrical signal exceeds a preset threshold.

[0023] In one possible implementation, the energy storage system further includes at least one locking assembly, each locking assembly being disposed corresponding to at least one battery layer, each locking assembly including at least two locking elements, the locking elements being disposed corresponding to each battery of the corresponding battery layer, and the locking elements and unlocking elements being disposed at both ends of the battery along a third direction.

[0024] The locking element has a locked position and an unlocked position. When the locking element is in the locked position, it stops at one end of the battery along a third direction. When the locking element is in the unlocked position, the locking element is offset from the battery, and the unlocking element causes the battery to move toward the locking element.

[0025] In one possible implementation, each locking assembly further includes a connector disposed on at least one side of the battery layer along a first direction;

[0026] The locking element is rotatably mounted on the connector to switch between a locked position and an unlocked position.

[0027] In one possible implementation, the locking element includes a first locking element and a second locking element, each of which is at least two, and at least two first unlocking elements and at least two second locking elements are alternately arranged along a second direction;

[0028] The first locking member is configured to correspond to each battery in one of the two adjacent battery layers, and the second locking member is configured to correspond to each battery in the other of the two adjacent battery layers.

[0029] The energy storage system of this application embodiment includes a battery stack, which includes battery layers, and each battery layer includes a battery. Since two adjacent batteries arranged along a first direction in two adjacent battery layers at least partially overlap and at least partially offset, the redundancy of the battery stack can be increased. This allows for the direct removal and replacement of a small number of abnormal batteries when they need to be removed, without the need to remove a large number of normal batteries. This improves the efficiency of removing and replacing abnormal batteries, thereby enhancing the maintenance efficiency of the energy storage system.

[0030] In addition to the technical problems solved by the embodiments of this application, the technical features constituting the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions described above, other technical problems that the energy storage system provided by this application can solve, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further explained in detail in the specific embodiments. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the energy storage system provided in the embodiments of this application;

[0033] Figure 2 This is a schematic diagram of the structure of the battery stack in the energy storage system provided in the embodiments of this application;

[0034] Figure 3 This is another structural schematic diagram of the battery stack in the energy storage system provided in the embodiments of this application;

[0035] Figure 4 This is a schematic diagram of battery removal in an energy storage system provided in an embodiment of this application;

[0036] Figure 5 for Figure 4 Rear view;

[0037] Figure 6 for Figure 1 Exploded view;

[0038] Figure 7 This is a schematic diagram of the structure of the integrated board and unlocking component in the energy storage system provided in the embodiments of this application;

[0039] Figure 8 This is a schematic diagram of the structure of the unlocking component in the energy storage system provided in the embodiments of this application;

[0040] Figure 9 Another structural schematic diagram of the unlocking component in the energy storage system provided in the embodiments of this application;

[0041] Figure 10 This is a schematic diagram of the locking component in the energy storage system provided in the embodiments of this application.

[0042] Explanation of reference numerals in the attached figures:

[0043] 100 - Battery stack; 110 - Battery layer; 110a - First battery layer; 110b - Second battery layer; 111 - Battery;

[0044] 200 - Unlocking component; 210 - Drive unit; 220 - Power unit; 230 - Connecting unit;

[0045] 300 - Integrated board; 310 - Substrate; 320 - First interface; 330 - Second interface;

[0046] 400 - Locking assembly; 410 - Locking element; 410a - First locking element; 410b - Second locking element; 420 - Connecting element;

[0047] 500-Cold Plate. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0049] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0050] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0051] The terms "first," "second," and "third" (if any) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein.

[0052] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or display that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or display.

[0053] Energy storage cabinets can include a cabinet body and multiple battery cells integrated within the cabinet. These cells are arranged horizontally to form a single layer, and multiple layers are stacked vertically to form a cell stack. When any cell in the stack malfunctions, a large number of other healthy cells need to be removed to extract the faulty cell. After replacing the faulty cell with a healthy one, it is then reinstalled along with the other extracted healthy cells. This reduces the efficiency of handling faulty cells. This is because, vertically stacked cells are aligned on opposite sides horizontally, with the lower cells providing support for the cells above them. Before removing the faulty cell, the healthy cells above it must be removed; otherwise, directly removing the faulty cell would cause the healthy cells above it to lose support and fall, potentially leading to the collapse of the cell stack.

[0054] In view of the above problems, this application provides an energy storage system that, by staggering two adjacent batteries arranged along a first direction, facilitates the direct removal and replacement of abnormal batteries without affecting the stability of the battery stack, thereby improving the processing efficiency of abnormal batteries.

[0055] The specific implementation of the energy storage system according to the embodiments of this application will be described below with reference to the accompanying drawings.

[0056] Reference Figures 1 to 4 As shown, the energy storage system provided in this application embodiment includes a battery stack 100, which includes at least two battery layers 110. The at least two battery layers 110 are stacked along a first direction, and each battery layer 110 includes at least two batteries 111. The at least two batteries 111 are arranged along a second direction. In two adjacent battery layers 110, the two batteries 111 arranged adjacent to each other along the first direction at least partially overlap and at least partially offset.

[0057] Wherein, the first direction is perpendicular to the second direction, and the first direction can be along the vertical direction, as can be referred to. Figure 1 The X direction is in the middle, and the second direction can be along the horizontal direction, as shown in the reference. Figure 1 in the Y direction.

[0058] It is understood that the energy storage system may also include a cabinet, and the battery stack 100 may be installed inside the cabinet, or the battery stack 100 may be directly installed inside the building. This embodiment does not limit this.

[0059] Multiple batteries 111 are arranged along the second direction to form a battery layer 110, and the multiple battery layers 110 are stacked along the first direction to form a battery stack 100. The batteries 111 in the battery stack 100 can be connected in series, or the batteries 111 in the battery stack 100 can be connected in parallel, or the multiple batteries 111 in the battery stack 100 can be partially connected in series and partially connected in parallel. This embodiment does not limit this.

[0060] In summary, the electrical connection of multiple batteries 111 in the battery stack 100 helps to increase the total capacity of the energy storage system, which in turn helps the energy storage system to store or release large amounts of electrical energy when needed.

[0061] In this embodiment, two batteries 111 arranged adjacent to each other along the first direction are staggered in the second direction, that is, the two batteries 111 arranged adjacent to each other along the first direction partially overlap and partially stagger.

[0062] Reference Figure 1 As shown, the battery stack 100 has 6 battery layers 110, which are labeled as battery layer 110, battery layer 2, ... battery layer 6 from bottom to top. Each battery layer 110 has 10 batteries 111, which are labeled as battery 111, battery 2, ... battery 10 from left to right.

[0063] Taking battery 111 and battery 211 of battery layer 110 and battery 111 of battery layer 2 as examples, in the first direction, battery 111 of battery layer 2 is arranged adjacent to battery 111 of battery layer 110, and battery 111 of battery layer 2 is also arranged adjacent to battery 111 of battery layer 110. In the second direction, battery 111 of battery layer 2 is staggered from battery 111 of battery layer 110. Battery 111 in battery 0 and battery 211 in battery layer 110 are also staggered. In this way, battery 111 and battery 211 in battery layer 110 can jointly support battery 111 in battery layer 2. If one of battery 111 and battery 211 in battery layer 110 is removed, the other battery 111 and battery 211 in battery layer 110 can continue to support battery 111 in battery layer 2, and the stability of battery stack 100 will not be affected.

[0064] This is because the staggered stacking method described above increases the redundancy of the battery stack 100. When a battery 111 in the battery stack 100 is removed, the surrounding batteries 111 can share the force borne by the removed battery 111. The surrounding batteries 111 will maintain balance by redistributing friction and pressure. In this way, when a small number of batteries 111 in the battery stack 100 malfunction and need to be removed, only a small number of malfunctioning batteries 111 can be removed and replaced directly, without the need to remove a large number of normal batteries 111. This improves the efficiency of removing and replacing malfunctioning batteries 111, thereby improving the maintenance efficiency of the energy storage system.

[0065] Reference Figure 4As shown, when it is necessary to remove Figure 4 When viewing battery 111 in view A, you can directly remove battery 111. Figure 4 When viewing battery 111 (number ②) in view A, it can be removed first. Figure 4 In view A, battery 111 (number ③) is positioned to avoid directly removing battery 111 (number ②) which could cause battery 111 to lose its support and thus prevent damage to battery 111. Figure 4 View B is a schematic diagram after batteries ①111, ②111 and ③111 have all been removed.

[0066] In this design, the dimension of a single battery 111 along the second direction is H1, and the overlap dimension of two batteries 111 is H2. H1 and H2 satisfy: 0.2H1≤H2≤0.8H1, thereby ensuring that at least one battery 111 can support the two batteries 111 located above it. For example, Figure 1 The two batteries 111 overlap by a dimension H2 = 0.5H1.

[0067] The energy storage system of this application embodiment includes a battery stack 100, which includes battery layers 110 and batteries 111. Since multiple battery layers 110 are arranged along a second direction to form a battery layer 110, and multiple battery layers 110 are stacked along a first direction to form a battery stack 100, multiple batteries 111 are integrated into a large-capacity energy storage system. Since two batteries 111 arranged adjacent to each other along the first direction overlap at least partially and are at least partially staggered, the redundancy of the battery stack 100 can be increased. Thus, when a small number of batteries 111 in the battery stack 100 malfunction and need to be removed, a small number of malfunctioning batteries 111 can be directly removed and replaced without removing a large number of normal batteries 111, thereby improving the removal and replacement efficiency of malfunctioning batteries 111 and improving the maintenance efficiency of the energy storage system.

[0068] In one possible implementation, at least two battery layers 110 are aligned at one end along a third direction, and at least two battery layers 110 are aligned at the other end along the third direction. The first direction, the second direction, and the third direction are mutually perpendicular, and the third direction is another horizontal direction perpendicular to the second direction. (Refer to...) Figure 1 The Z direction in the equation.

[0069] In other words, two adjacent batteries 111 along the first direction are staggered in the second direction to improve the redundancy of the battery stack 100, and two adjacent batteries 111 along the first direction are aligned in the third direction to reduce the volume occupied by the battery stack 100, thereby improving the space utilization of the energy storage system.

[0070] Reference Figure 2As shown, in some embodiments, the battery layer 110 includes a first battery layer 110a and a second battery layer 110b, with at least two of each. The at least two first battery layers 110a and at least two second battery layers 110b are alternately arranged along a first direction.

[0071] Each first battery layer 110a has the same number of batteries 111, and each first battery layer 110a is aligned at one end along the second direction and at the other end along the second direction.

[0072] Each second battery layer 110b has the same number of batteries 111, and each second battery layer 110b is aligned at one end along the second direction and at the other end along the second direction.

[0073] In this way, when the battery stack 100 is formed, the first battery layer 110a and the second battery layer 110b can be stacked alternately as two standard components along the first direction, which helps to improve the stacking efficiency of the battery stack 100. In addition, multiple first battery layers 110a are aligned in the second direction, multiple second battery layers 110b are aligned in the second direction, and the first battery layers 110a and the second battery layers 110b are staggered in the second direction, which helps to increase the redundancy and space utilization of the battery stack 100.

[0074] Reference Figure 2 As shown, in some embodiments, along a first direction, the orthographic projection of one of the first battery layer 110a and the second battery layer 110b overlaps the orthographic projection of the other.

[0075] In other words, in this configuration, the number of batteries 111 in the first battery layer 110a is less than the number of batteries 111 in the second battery layer 110b, or the number of batteries 111 in the first battery layer 110a is greater than the number of batteries 111 in the second battery layer 110b. In the first battery layer 110a and the second battery layer 110b, two adjacent batteries 111 are staggered in the second direction so that one battery 111 can support two batteries 111 above it, or two batteries 111 jointly support one battery 111 above them. Removing a small number of batteries 111 from the battery stack 100 will not disrupt the balance of the battery stack 100, thereby improving the stability and maintenance efficiency of the battery stack 100.

[0076] Reference Figure 1 As shown, in some embodiments, along the first direction, the orthographic projection of the first battery layer 110a and the orthographic projection of the second battery layer 110b partially overlap, while the orthographic projection of the first battery layer 110a and the orthographic projection of the second battery layer 110b are offset.

[0077] In other words, in this configuration, the number of batteries 111 in the first battery layer 110a is the same as the number of batteries 111 in the second battery layer 110b. Thus, after multiple battery stacks 100 are stacked to form a battery stack 100, the first battery layer 110a and the second battery layer 110b are staggered in the second direction, which helps to improve the maintenance efficiency and space utilization of the battery stack 100.

[0078] Reference Figure 3 As shown, in some embodiments, the number of batteries 111 in each battery layer 110 gradually decreases along the first direction.

[0079] Understandably, in order to improve the stability of the battery stack 100, the number of batteries 111 in each battery layer 110 can be gradually reduced from bottom to top during stacking to form a pyramid-shaped battery stack 100. In this way, the two batteries 111 at the bottom support the battery 111 above them. During maintenance, the abnormal battery 111 can be directly removed, and the battery stack 100 has high maintainability.

[0080] Reference Figures 5 to 9 As shown, in one possible implementation, the energy storage system further includes at least four unlocking components 200, each of which is configured to correspond one-to-one with each battery 111 of the battery stack 100, and the unlocking component 200 is located at one end of the battery 111 along a third direction.

[0081] The unlocking member 200 has a driving part 210 that moves toward the battery 111 to drive the battery 111 to move away from the unlocking member 200.

[0082] In this way, when a battery 111 in the battery stack 100 has an abnormal problem and needs to be removed, the corresponding unlocking component 200 can be controlled to push the battery 111 to move in a third direction, thereby pushing at least a part of the battery 111 away from the battery stack 100. This facilitates the removal of the abnormal battery 111 and prevents the abnormal problem from worsening and causing major safety problems, such as explosions or fires. This helps to improve the maintenance efficiency and safety performance of the battery stack 100.

[0083] Reference Figure 8 , Figure 9 As shown, it should be noted that the unlocking component 200 may also include a power unit 220 and a connecting unit 230. The connecting unit 230 is connected to the substrate 310. The power unit 220 is connected to the drive unit 210 and the connecting unit 230. When it is necessary to push the battery 111, the power unit 220 can provide power to the drive unit 210, thereby causing the drive unit 210 to move toward the battery 111, thereby causing the drive unit 210 to drive the battery 111 to detach from the battery stack 100 in a third direction.

[0084] For example, the power unit 220 can be a spring, with the two ends of the spring connected to the drive unit 210 and the connecting unit 230. The drive unit 210 and the connecting unit 230 are detachably connected by means of a snap fastener or the like, so that after the drive unit 210 is disconnected from the connecting unit 230, it moves toward the battery 111 under the elastic force of the compressed spring.

[0085] For example, the power unit 220 can be a telescopic rod, which can be driven by electric, pneumatic or other means.

[0086] Reference Figures 5 to 7 As shown, in one possible implementation, the energy storage system further includes an integrated board 300, which includes a substrate 310 and at least four first interfaces 320. The first interfaces 320 are disposed on the substrate 310, and the at least four first interfaces 320 are electrically connected to each other. Each battery 111 of the battery stack 100 is electrically connected to a corresponding first interface 320, and at least four unlocking members 200 are fixedly connected to the substrate 310.

[0087] In this way, the substrate 310 can be used to support the unlocking component 200, which is conducive to integrating multiple unlocking components 200 together. Furthermore, multiple first interfaces 320 can be provided on the substrate 310. The first interfaces 320 can be electrically connected to the battery 111, thereby connecting multiple batteries 111 of the battery stack 100 in series, parallel, or series-parallel combination, which is conducive to improving the integration of the energy storage system.

[0088] The integrated board 300 may also include a circuit board, and the battery 111 is laid in the integrated board 300. Each first interface 320 can be electrically connected through the circuit of the circuit board, or multiple first interfaces 320 can be electrically connected through wires. This application embodiment does not limit this.

[0089] Reference Figure 6 , Figure 7 As shown, in one possible implementation, the energy storage system further includes a thermal management subsystem, and the integrated board 300 further includes at least four second interfaces 330. The second interfaces 330 are disposed on the substrate 310 and are electrically connected to each battery 111 of the battery stack 100. The thermal management subsystem is electrically connected to the second interfaces 330.

[0090] The thermal management subsystem is configured such that when the electrical signal of the battery 111 exceeds a preset threshold, the control drive unit 210 drives the battery 111 to move away from the substrate 310.

[0091] In this way, the thermal management subsystem can detect the electrical signal of each battery 111. The current, voltage and other electrical signals of the battery 111 can be transmitted to the thermal management subsystem through the corresponding second interface 330. If the electrical signal of the battery 111 is too large and exceeds the preset threshold, it indicates that the battery 111 is at risk of thermal runaway. At this time, the thermal management subsystem can control the abnormal battery 111 to cut off the power and control the drive unit 210 to move the abnormal battery 111 along a third direction, so as to cause the abnormal battery 111 to detach from the battery stack 100, thereby preventing the thermal runaway from spreading further and affecting the surrounding normal batteries 111, thereby preventing safety problems such as fire and explosion, and thus improving the fire protection performance of the battery stack 100.

[0092] Reference Figure 1 , Figure 6 , Figure 10 As shown, it can be understood that in order to make it easy to remove the battery 111 from the battery stack 100, the stacked battery 111 is in a relatively loose state. Therefore, the energy storage system also includes at least one locking component 400. Each locking component 400 is correspondingly provided with at least one battery layer 110. Each locking component 400 includes at least two locking members 410. The locking members 410 are correspondingly provided with each battery 111 of the corresponding battery layer 110. The locking members 410 and the unlocking members 200 are provided at both ends of the battery 111 along a third direction.

[0093] The locking member 410 has a locked position and an unlocked position. When the locking member 410 is in the locked position, it stops at one end of the battery 111 along a third direction. When the locking member 410 is in the unlocked position, it is offset from the battery 111, and the unlocking member 200 moves the battery 111 toward the locking member 410.

[0094] In this way, when the battery 111 is in a normal state, the locking member 410 is in the locked position, and the locking member 410 stops at one end of the battery 111 along the third direction. The integrated plate 300 stops at the other end of the battery 111 along the third direction, thereby effectively constraining the position of the battery 111 in the third direction. When the battery 111 is in an abnormal state, the thermal management subsystem can control the locking member 410 to change from the locked position to the unlocked position. The locking member 410 avoids the battery 111, so that the unlocking member 200 can drive the battery 111 to detach from the battery stack 100, thereby improving the maintainability and safety performance of the battery stack 100.

[0095] Reference Figure 10 As shown, in some embodiments, each locking assembly 400 further includes a connector 420 disposed on at least one side of the battery layer 110 along a first direction. The locking member 410 is rotatably disposed on the connector 420 to switch between a locked position and an unlocked position.

[0096] With this configuration, multiple locking elements 410 can be integrated on the connector 420, which is beneficial for multiple locking elements 410 to be configured corresponding to one battery layer 110, or multiple locking elements 410 to be configured corresponding to two adjacent battery layers 110. The locking elements 410 can flexibly switch between the locked position and the unlocked position, thereby improving the limiting reliability and removal efficiency of the battery 111.

[0097] Reference Figure 1 As shown, in some embodiments, the energy storage system may further include a cold plate 500, which may be disposed between the first battery layer 110a and the second battery layer 110b and in thermally conductive contact with both the first battery layer 110a and the second battery layer 110b to cool the first battery layer 110a and the second battery layer 110b. The connector 420 may be connected to the cold plate 500, or the connector 420 may be connected to one of the first battery layer 110a and the second battery layer 110b.

[0098] Reference Figure 10 As shown, in some embodiments, the locking member 410 includes a first locking member 410a and a second locking member 410b, with at least two of each. At least two first unlocking members 200 and at least two second locking members 410b are alternately arranged along a second direction.

[0099] The first locking member 410a is configured to correspond to each battery 111 of one of the two adjacent battery layers 110, and the second locking member 410b is configured to correspond to each battery 111 of the other of the two adjacent battery layers 110.

[0100] This can improve the integration of the locking assembly 400. One locking assembly 400 can be set to correspond to two adjacent battery layers 110 and provide a limit for each battery 111 of the two battery layers 110, thereby improving the limit reliability of each battery 111 of the battery stack 100.

[0101] When the locking member 410 is rotated on the connector 420, the first locking member 410a and the second locking member 410b rotate in opposite directions during locking and unlocking to prevent interference between adjacent first locking members 410a and second locking members 410b.

[0102] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An energy storage system, characterized in that, include: A battery stack (100) includes at least two battery layers (110), the at least two battery layers (110) are stacked along a first direction, each battery layer (110) includes at least two batteries (111), the at least two batteries (111) are arranged along a second direction; Two batteries (111) arranged adjacent to each other along the first direction at least partially overlap and at least partially offset; Wherein, the first direction is perpendicular to the second direction.

2. The energy storage system according to claim 1, characterized in that, At least two of the battery layers (110) are aligned at one end along a third direction, and at least two of the battery layers (110) are aligned at the other end along the third direction; Wherein, the first direction, the second direction, and the third direction are perpendicular to each other.

3. The energy storage system according to claim 1 or 2, characterized in that, The battery layer (110) includes a first battery layer (110a) and a second battery layer (110b), wherein there are at least two first battery layers (110a) and at least two second battery layers (110b), and at least two first battery layers (110a) and at least two second battery layers (110b) are alternately arranged along the first direction; The number of batteries (111) in each of the first battery layers (110a) is the same, and one end of each of the first battery layers (110a) along the second direction is aligned, and the other end of each of the first battery layers (110a) along the second direction is aligned. The number of batteries (111) in each of the second battery layers (110b) is the same, and one end of each of the second battery layers (110b) along the second direction is aligned, and the other end of each of the second battery layers (110b) along the second direction is aligned.

4. The energy storage system according to claim 3, characterized in that, Along the first direction, the orthographic projection of one of the first battery layer (110a) and the second battery layer (110b) overlaps the orthographic projection of the other.

5. The energy storage system according to claim 3, characterized in that, Along the first direction, the orthographic projection of the first battery layer (110a) and the orthographic projection of the second battery layer (110b) partially overlap, while the orthographic projection of the first battery layer (110a) and the orthographic projection of the second battery layer (110b) partially offset.

6. The energy storage system according to claim 1 or 2, characterized in that, Along the first direction, the number of batteries (111) in each of the battery layers (110) gradually decreases.

7. The energy storage system according to claim 2, characterized in that, It also includes at least four unlocking components (200), each unlocking component (200) being disposed corresponding to each of the batteries (111) in the battery stack (100), and the unlocking component (200) being disposed at one end of the battery (111) along the third direction; The unlocking member (200) has a driving part (210) that moves toward the battery (111) to drive the battery (111) to move away from the unlocking member (200).

8. The energy storage system according to claim 7, characterized in that, It also includes an integrated board (300), which includes a substrate (310) and at least four first interfaces (320). The first interfaces (320) are disposed on the substrate (310), and the at least four first interfaces (320) are electrically connected to each other. Each battery (111) of the battery stack (100) is electrically connected to the first interface (320). At least four of the unlocking components (200) are fixedly connected to the base plate (310).

9. The energy storage system according to claim 8, characterized in that, It also includes a thermal management subsystem. The integrated board (300) further includes at least four second interfaces (330). The second interfaces (330) are disposed on the substrate (310). The second interfaces (330) are electrically connected to each of the batteries (111) of the battery stack (100). The thermal management subsystem is electrically connected to the second interfaces (330). The thermal management subsystem is configured to control the drive unit (210) to move the battery (111) away from the substrate (310) when the electrical signal of the battery (111) exceeds a preset threshold.

10. The energy storage system according to any one of claims 7-9, characterized in that, It also includes at least one locking assembly (400), each of the locking assemblies (400) being disposed corresponding to at least one of the battery layers (110), each of the locking assemblies (400) including at least two locking members (410), the locking members (410) being disposed corresponding to each of the batteries (111) of the corresponding battery layer (110), the locking members (410) and the unlocking members (200) being disposed at both ends of the battery (111) along the third direction; The locking member (410) has a locked position and an unlocked position. When the locking member (410) is in the locked position, the locking member (410) stops at one end of the battery (111) along the third direction. When the locking member (410) is in the unlocked position, the locking member (410) is offset from the battery (111), and the unlocking member (200) drives the battery (111) to move toward the locking member (410).

11. The energy storage system according to claim 10, characterized in that, Each locking assembly (400) further includes a connector (420) disposed on at least one side of the battery layer (110) along the first direction; The locking member (410) is rotatably disposed on the connector (420) to switch between the locked position and the unlocked position.

12. The energy storage system according to claim 10, characterized in that, The locking member (410) includes a first locking member (410a) and a second locking member (410b), and there are at least two of the first locking member (410a) and the second locking member (410b), and at least two of the first unlocking member (200) and at least two of the second locking member (410b) are alternately arranged along the second direction; The first locking member (410a) is disposed corresponding to each of the batteries (111) of one of the two adjacent battery layers (110), and the second locking member (410b) is disposed corresponding to each of the batteries (111) of the other of the two adjacent battery layers (110).

Images