Energy storage module

Abstract

The utility model discloses a kind of energy storage modules, including multiple groups of battery cell, two end plates, metal plate and hoop, and multiple groups of battery cell are sequentially stacked along its width direction and arranged to form battery pack. Two end plates are respectively arranged at the both ends of battery pack, and play the role of limiting battery pack;Metal plate is arranged at the intermediate position of battery pack, and two lifting holes are provided at the top of metal plate;Hoop is annular structure, and is tightly held in the circumferential direction of end plate and battery pack. Through the compact battery cell arrangement structure, the energy storage module is firmly fixed. When hoisting the module, the end plate at both ends and the metal plate in the middle form a three-point hoisting structure, improving the stability of hoisting, avoiding loosening during hoisting, and solving the problem of module hoisting scattering.

Description

Technical Field

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

[0002] An energy storage module is an energy storage device consisting of multiple battery cells connected in series and parallel, along with auxiliary structural components that collect current, gather data, and provide structural protection for the battery cells, forming a modular battery pack. Energy storage modules can be widely used in areas such as grid peak shaving, electric transportation, and distributed energy.

[0003] With the development of energy storage systems, in order to increase the voltage that energy storage devices can provide, the number of battery cells in each energy storage module is increasing, meaning that the length of a single energy storage module is getting longer and longer. Traditional solutions for making large modules only use end plates at both ends of the energy storage module to fix it. However, the fixing effect is obviously insufficient for modules longer than 1 meter. Especially when lifted and transported by hoisting fixtures, the energy storage module is prone to loosening, large deformation, and inability to be transported normally. It may even cause safety issues such as the module falling apart due to insufficient strength. In addition, the existing module leads aluminum busbars use two-point series connection. The contact area at the connection point is limited. The high temperature of the copper busbars in high-current series connection is high, and the temperature rise is large. High temperature can not only damage the internal structure of the energy storage device, but also deteriorate the consistency of the unit power supply, and cause abnormal charging and discharging. In severe cases, it can lead to thermal runaway of the energy storage device, resulting in accidents such as combustion.

[0004] This indicates that existing energy storage devices have drawbacks such as being prone to deformation and breakage during hoisting and transportation, as well as issues like high connection temperatures between cells and poor cell consistency, which can lead to safety hazards. Utility Model Content

[0005] Therefore, this utility model provides an energy storage module to solve the problems mentioned in the background art, such as low conductivity, large cell temperature rise, low safety, and easy deformation and disintegration during hoisting.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An energy storage module includes multiple sets of battery cells, two end plates, a metal plate, and a clamp. The multiple sets of battery cells are stacked and arranged sequentially along their width to form a battery pack. The two end plates are respectively located at both ends of the battery pack. The metal plate is located in the middle of the battery pack. Two lifting holes are opened on the top of the metal plate. The clamp is a ring structure and is tightly held in the circumference of the end plates and the battery pack.

[0008] The battery pack has a lead-out piece at its output end, and the lead-out piece has three connection holes.

[0009] An insulating mounting base is also provided at the output end of the battery pack. The insulating mounting base is connected to the top of the end plate and a sensor is embedded in the insulating mounting base.

[0010] A composite plate is provided between two adjacent sets of battery cells. The composite plate includes a phase change material layer, an aerogel layer, and a mica sheet layer, with the aerogel layer located between the phase change material layer and the mica sheet layer.

[0011] PC insulating sheets are provided on both sides of the metal plate and the end plate.

[0012] The battery pack has an aluminum bar connector at the top, which connects multiple battery cells in series. The aluminum bar connector is laser-welded to the battery cells.

[0013] The battery pack is also provided with a blister tray on top, which fits the outer contour of the aluminum bar connector.

[0014] This utility model has the following advantages:

[0015] 1. The energy storage module provided by this utility model has a metal plate added in the middle of the module and a lifting hole opened on the top of the metal plate. When the module is hoisted, the end plates at both ends and the metal plate in the middle form a three-point hoisting structure, which improves the hoisting stability. The compact cell arrangement structure of this energy storage module makes the energy storage module firmly fixed and avoids loosening during hoisting, thus solving the problem of module unpacking during hoisting.

[0016] 2. By adding connection holes to the lead-out plates, this energy storage module solves the problem of increased temperature of the copper busbar connecting the modules, thereby improving the safety of the energy storage system.

[0017] 3. Adding composite plates between multiple groups of cells for heat insulation reduces the temperature of multiple groups of cells, improves the temperature uniformity of a single group of cells, reduces interference between adjacent cells, and results in better cell consistency.

[0018] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of this application will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0019] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0020] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which this utility model can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0021] Figure 1 A schematic diagram of the structure of an energy storage module provided in an embodiment of this utility model;

[0022] Figure 2 This is an exploded structural diagram of an energy storage module provided for an embodiment of the present invention.

[0023] In the diagram: 1. Composite board; 2. End plate; 3. PC insulation sheet; 4. Metal plate; 5. Battery cell; 6. Aluminum battery connecting piece; 7. Blister tray; 8. Insulating fixing base; 9. Hoop; 10. Lead-out piece; 11. Lifting hole. Detailed Implementation

[0024] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] Example 1

[0026] like Figure 1-2 As shown, this embodiment provides an energy storage module, including multiple sets of battery cells 5, two end plates 2, a metal plate 4, and a clamp 9. The multiple sets of battery cells 5 are stacked and arranged sequentially along their width to form a battery pack and placed in an extrusion fixture. The two end plates 2 are respectively located at both ends of the battery pack to limit their position. The end plates 2 are then pressed by an extruder to make them compactly arranged to reduce the gap between adjacent battery cells 5, improve their robustness, and prevent misalignment. The end plates 2 provide mechanical support and rigid protection for the battery pack, reducing the risk of vibration and collision between battery cells.

[0027] Metal plate 4 is positioned in the middle of the battery pack. Two lifting holes 11 are provided on the top of metal plate 4. The clamps 9 are ring-shaped and hold the two clamps 9 tightly around the end plates 2 and the circumference of the battery pack. By adding metal plate 4 in the middle of the battery pack, the lifting fixture can simultaneously lift the end plates 2 at both ends and the metal plate 4 in the middle when lifting and transporting the module. The three points share the force and the force is evenly distributed, which improves the lifting stability and prevents the module from deforming during the lifting and transport process. The thickness of metal plate 4 is 3mm, which not only does not increase the length of the module, but also improves the module integration through compact design, and solves the problem of loose packs during lifting.

[0028] Example 2

[0029] A lead-out piece 10 is provided at the output end of the battery pack, and the lead-out piece 10 has three connection holes. Because the battery pack has a large current and generates a lot of heat, by providing three connection holes, the contact area of ​​the connection point is increased, the contact resistance is reduced, and the conductivity is improved, thus solving the problem of battery pack height increase and improving the safety of the energy storage system.

[0030] An insulating fixing bracket 8 is also provided at the output end of the battery pack. The insulating fixing bracket 8 is injection molded from a high-insulation material and is connected to the top of the end plate 2 and abuts against the end of the lead piece 10. It is used to block direct contact between the end plate 2 and the lead piece 10, prevent short circuit accidents, and play a role in insulation and fixation, ensuring safe isolation between the battery cell 5 and the metal end plate 2 and avoiding potential safety hazards. A sensor is embedded in the insulating fixing bracket 8. By embedding the sensor in the insulating fixing bracket 8, the insulation resistance value between the battery cell 5 and the end plate 2 can be monitored and an alarm can be triggered to reduce the risk of leakage or short circuit and maintain the stability of the battery cell performance.

[0031] Example 3

[0032] A composite plate 1 is installed between two adjacent sets of battery cells 5. The composite plate 1 has a three-layer structure, including a phase change material layer, an aerogel layer, and a mica sheet layer. The aerogel layer is located between the phase change material layer and the mica sheet layer. The aerogel effectively inhibits the spread of thermal runaway. Adding the composite plate 1 between two adjacent sets of battery cells can improve the heat insulation effect, effectively reduce the temperature of the battery cells, improve the temperature uniformity of a single battery cell, reduce interference between adjacent battery cells, and ensure good cell consistency. The composite plate has a buffering and shock-absorbing function and is easy to install and remove. It not only solves the problem of uneven temperature difference within the battery cells themselves, but also solves the problem of fireproofing and heat insulation between battery cells.

[0033] PC insulating sheets 3 are provided on both sides of the metal plate 4 and the end plate 2. The PC insulating sheets have flame-retardant, insulating and high-temperature resistant properties. Adding PC insulating sheets 3 to both sides of the end plate 2 and the metal plate 4 forms a physical separation with the battery cell and builds a thermal barrier. While ensuring insulation, it also helps the battery pack dissipate heat and improves the safety of the battery module.

[0034] An aluminum connector 6 is located at the top of the battery pack, used to connect multiple battery cells 5 in series. The aluminum connector 6 and the battery cells 5 are connected by laser welding, resulting in a strong connection and precise welding points, ensuring the stability and safety of the electrical connection. Compared with traditional welding methods, laser welding has low heat input and causes less thermal damage to the materials surrounding the battery cells. In addition, laser welding is fast, and when combined with a robotic system for collaborative assembly, it can achieve fully automated operation, significantly improving the production efficiency of battery modules and reducing labor costs.

[0035] A blister tray 7 is also provided on the top of the battery pack. The blister tray 7 is custom-formed according to the contours of the battery cell 5 and the connecting piece 6. It is fitted to the shape of the components through a vacuum adsorption process, and the blister tray 7 fits the contours of the connecting piece 6 on the top of the battery pack. This not only prevents the components from falling off or colliding due to transportation vibration, but also accurately positions the installation and avoids the influence of welding slag. Preferably, the blister tray 7 is made of anti-static material, which can effectively release static charge, eliminate electrostatic interference, and prevent sparks or short circuits caused by static accumulation between the battery cell 5 and the connecting piece 6. This avoids damage to the battery cell 5 and the connecting piece 6 due to electrostatic discharge during transportation or storage, and solves the insulation problem. Preferably, the blister tray 7 is made of waterproof material such as polyethylene, which can effectively isolate moisture and chemicals, ensuring the safe storage of the battery cell 5 and the connecting piece 6 in humid or corrosive environments.

[0036] Although the present invention has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. An energy storage module, characterized in that, The battery pack includes multiple sets of battery cells (5), two end plates (2), a metal plate (4), and a clamp (9). The multiple sets of battery cells (5) are stacked and arranged in sequence along their width to form a battery pack. The two end plates (2) are respectively located at both ends of the battery pack. The metal plate (4) is located in the middle of the battery pack. The top of the metal plate (4) has two lifting holes (11). The clamp (9) is a ring structure and is tightly held in the circumference of the end plates (2) and the battery pack.

2. The energy storage module according to claim 1, characterized in that, A lead-out piece (10) is provided at the output end of the battery pack, and the lead-out piece (10) has three connection holes.

3. The energy storage module according to claim 1, characterized in that, An insulating mounting base (8) is also provided at the output end of the battery pack. The insulating mounting base (8) is connected to the top of the end plate (2), and a sensor is embedded in the insulating mounting base (8).

4. The energy storage module according to claim 1, characterized in that, A composite plate (1) is provided between two adjacent sets of the battery cells (5). The composite plate (1) includes a phase change material layer, an aerogel layer and a mica sheet layer. The aerogel layer is located between the phase change material layer and the mica sheet layer.

5. The energy storage module according to claim 1, characterized in that, PC insulating sheets (3) are provided on both sides of the metal plate (4) and the end plate (2).

6. The energy storage module according to claim 1, characterized in that, The top of the battery pack is provided with an aluminum bar connector (6) for multiple sets of the battery cells (5) connected in series, and the aluminum bar connector (6) is laser welded to the battery cells (5).

7. The energy storage module according to claim 6, characterized in that, A blister tray (7) is also provided on the top of the battery pack, and the blister tray (7) is fitted with the outer contour of the aluminum bar connecting piece (6).

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