Energy storage device

Abstract

The utility model provides an energy storage device. The energy storage device comprises a battery module; the shell comprises a base, a first plate body, a second plate body and a third plate body, wherein the first plate body and the second plate body are rotationally arranged on the two opposite sides of the base through rotating parts, and the third plate body is fixedly kept between the first plate body and the second plate body. The cooling system comprises a plurality of cold plates arranged in the shell; the cold plates are arranged between the first plate body and the second plate body at intervals in the vertical direction, and the cold plates divide the shell into a plurality of containing cavities used for containing the battery modules. According to the energy storage device, the space utilization rate is improved by optimizing the structure of the energy storage device, the energy density of the energy storage device is improved, and the overall performance of the energy storage device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage, and particularly relates to an energy storage device. Background Art

[0002] With the continuous progress of technology and the increasing demand of users for power equipment, the coverage and power supply capacity of the national power infrastructure have become stretched in some areas. Especially in remote areas or emerging cities, the lack of power supply and the instability of the power grid have become key factors restricting local economic development and the improvement of residents' living quality. It is in such a context that energy storage systems, as a technical means to effectively solve the above problems, have gradually received extensive attention and emphasis.

[0003] Modern energy storage systems usually consist of multiple energy storage devices, which work together to ensure stable and reliable power supply during peak power demand or power grid failures. However, with the continuous improvement of users' requirements for the stored electricity and application of energy storage devices, higher requirements are also put forward for the energy density of energy storage devices.

[0004] Traditional energy storage devices generally consist of key components such as battery systems, control systems, power distribution systems, thermal management systems, fire protection systems, and energy storage inverters. The integration and configuration of these systems are crucial for ensuring the safe and stable operation of energy storage devices. But at the same time, they also occupy a relatively large space inside the device. Especially for the structural components of the fixed battery system, traditional designs often require a large amount of space to ensure their stability and safety. When the size is fixed, the traditional design cannot effectively utilize the internal space, which means that more energy cannot be stored, thus being unfavorable for improving the overall performance of the energy storage device. Summary of the Utility Model

[0005] In view of this, the utility model aims to propose an energy storage device to improve the overall performance of the energy storage device by optimizing its own structure.

[0006] To achieve the above object, the technical solution of the utility model is realized as follows:

[0007] An energy storage device, comprising:

[0008] A battery module;

[0009] A housing, the housing includes a base, a first plate body and a second plate body rotatably provided on two opposite sides of the base through a rotating part, and a third plate body fixedly held between the first plate body and the second plate body;

[0010] A cooling system, the cooling system includes a plurality of cold plates provided in the housing;

[0011] The cold plates are arranged at intervals in the vertical direction between the first plate body and the second plate body, and the cold plates divide the housing into several accommodation cavities for accommodating battery modules.

[0012] Furthermore, a limiting portion is provided on the housing, and the limiting portion constitutes a restraint for the cold plates within the housing, so that the cold plates contact the outer surfaces of the battery modules.

[0013] Furthermore, the limiting portion includes limiting grooves provided on the first plate body and the second plate body, and the end portions of the cold plates in contact with the housing are received in the limiting grooves.

[0014] Furthermore, through holes are formed in the limiting grooves, and the cold plates are fixed and held on the housing by bolts passing through the through holes.

[0015] Furthermore, the limiting portion further includes limiting strips, the limiting strips are fixedly held on two opposite sides of the cold plates, and convex ridges extend upward from the tops of the limiting strips, and the convex ridges abut against the battery modules to constitute a restraint for the battery modules located in the accommodation cavities.

[0016] Furthermore, the rotating portion includes an accommodation groove provided on the base, and convex blocks extending from the bottoms of the first plate body and the second plate body towards the base;

[0017] When the first plate body and the second plate body are assembled on the base, the convex blocks are inserted into the accommodation groove.

[0018] Furthermore, the rotating portion further includes a pin shaft, the pin shaft passes through the accommodation groove and the convex blocks to constitute a rotating support for the first plate body and the second plate body on the base; and / or,

[0019] The end portions of the convex blocks facing the accommodation groove are arranged as arc surfaces.

[0020] Furthermore, elastic layers are provided on both the first plate body and the second plate body, and when the battery modules are assembled in the housing, the sides of the battery modules compress the elastic layers.

[0021] Furthermore, the elastic layers are configured to be multiple and provided on the first plate body and the second plate body, each elastic layer is provided between two adjacent cold plates, and the multiple elastic layers correspond to the battery modules one by one.

[0022] Furthermore, the elastic layer is elastic foam.

[0023] Compared with the prior art, the present utility model has the following advantages:

[0024] The energy storage device described in the present utility model has a first housing and a second housing rotatably arranged on a base through a rotating part, which is conducive to the assembly of the energy storage device, convenient for operation, and uses a cold plate as the installation base for the battery module, reducing the fixing structure of the battery module and being able to provide better cooling effect for the battery module group, which is conducive to improving the space utilization rate of the energy storage device, and helps to improve the energy density of the energy storage device and is conducive to improving the overall performance of the energy storage device.

[0025] Through the arrangement of the limiting part, the battery module can be better constrained in the accommodating cavity, which is conducive to ensuring the stable support of the cold plate for the battery module group, and the outer surface of the cold plate contacting the battery module can provide better cooling effect for the battery module.

[0026] Through the arrangement of the limiting groove, the assembly of the cold plate in the housing is more convenient, and the structure is simple, which is conducive to design and implementation.

[0027] Through the cooperation of the through hole and the bolt, the installation of the cold plate in the limiting groove is more convenient, the structure is simple, and it is conducive to the installation operation.

[0028] Through the arrangement of the limiting strip, the battery module group located on the cold plate can be better constrained, so that the battery module group can be stably arranged on the cold plate, which is conducive to design and implementation.

[0029] Through the plug-in cooperation of the accommodating groove and the convex block, the stability of the overall structure is improved, and the convex block can be inserted into the accommodating groove as a guide, which is convenient for the assembly and disassembly of the first plate body and the second plate body with the base, and the structure is simple, which is conducive to design and implementation.

[0030] Through the arrangement of the pin shaft, the rotation of the first plate body and the second plate body on the base is more stable, and the arrangement of the pin shaft is convenient for the assembly and disassembly of the first plate body and the second plate body with the base. The end of the convex block is arranged as an arc surface, which is beneficial to the rotation of the convex block in the accommodating groove, reduces the wear between the convex block and the base during the rotation process, and can improve the assembly convenience, which is conducive to design and implementation.

[0031] Through the arrangement of the elastic layer, when the first plate body and the second plate body rotate and abut against the battery module, the elastic layer is compressed, and due to the elasticity of the elastic layer itself, a certain pre-tightening force is generated on the battery module group, which is beneficial to providing a certain initial pre-tightening force for the battery module group.

[0032] The elastic layer is arranged corresponding to the battery module, which is conducive to cost saving, and is convenient for the arrangement of other structures, and the structure is simple, which is conducive to design and implementation.

[0033] Using elastic foam as the elastic layer is convenient for processing and manufacturing, can provide excellent buffering and shock absorption capabilities, and the elastic foam is lighter, which is conducive to the lightweight design of the device and helps to design and implementation. Description of the Drawings

[0034] The accompanying drawings, which form a part of the present utility model, are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0035] Figure 1 is a schematic structural diagram of the energy storage device according to the embodiment of the present utility model;

[0036] Figure 2 is an exploded view of the energy storage device according to the embodiment of the present utility model;

[0037] Figure 3 is Figure 1 an enlarged view of part A of;

[0038] Figure 4 is Figure 1 an enlarged view of part B of;

[0039] Figure 5 is Figure 2 an enlarged view of part C of;

[0040] Description of reference numerals:

[0041] 1. Battery module; 101. Battery cell;

[0042] 2. Housing;

[0043] 201. Base; 202. Rotating part;

[0044] 2021. Accommodating groove; 2022. Protrusion; 2023. Pin shaft;

[0045] 203. First plate body; 204. Second plate body; 205. Third plate body;

[0046] 206. Limiting part;

[0047] 2061. Limiting groove; 2062. Through hole; 2063. Limiting strip; 2064. Convex rib;

[0048] 207. Elastic layer;

[0049] 3. Cooling system; 301. Cold plate; 302. Liquid chiller;

[0050] 4. Power distribution unit;

[0051] s. Accommodating cavity. Detailed implementation manners

[0052] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0053] In the description of the present utility model, it should be noted that if terms indicating orientation or positional relationship such as "upper", "lower", "inner", "outer", etc. appear, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present utility model. In addition, if terms such as "first", "second", etc. appear, they are also only for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0054] Taking the energy storage device described in the present utility model as an example, in the embodiments, the orientation terms such as "upper, lower, left, right, front, back" are defined based on the up-down direction (also known as the height direction), left-right direction (also known as the width direction), and front-back direction (also known as the length direction) of the energy storage device. "Inner" and "outer" are defined based on the contour of the corresponding component. For example, "inner" and "outer" defined based on the contour of the energy storage device, with the side closer to the middle of the energy storage device being "inner" and the opposite being "outer".

[0055] In addition, in the description of the present utility model, unless otherwise clearly defined, the terms "installation", "connection", "connection", "connecting piece" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood in combination with specific situations.

[0056] The present utility model will be described in detail below with reference to the drawings and in combination with embodiments.

[0057] Embodiment 1

[0058] This embodiment relates to an energy storage device to improve the overall performance of the energy storage device by optimizing its own structure.

[0059] In terms of the overall structure, as Figures 1 to 5 shown, the energy storage device in this embodiment includes a battery module 1. A housing 2, the housing 2 includes a base 201, a first plate body 203 and a second plate body 204 rotatably provided on two opposite sides of the base 201 through a rotating part 202, and a third plate body 205 fixedly held between the first plate body 203 and the second plate body 204. A cooling system 3, the cooling system 3 includes a plurality of cold plates 301 provided in the housing 2. The cold plates 301 are arranged at intervals in the vertical direction between the first plate body 203 and the second plate body 204, and the cold plates 301 divide the housing 2 into several accommodation cavities s for accommodating the battery module 1.

[0060] With the above settings, in the energy storage device of this embodiment, the first housing 2 and the second housing 2 are rotatably arranged on the base 201 through the rotating part 202, which is beneficial to the assembly of the energy storage device, convenient for operation, and uses the cold plate 301 as the installation base of the battery module 1, reducing the fixing structure of the battery module 1 and being able to provide better cooling effect for the battery module, which is beneficial to improving the space utilization rate of the energy storage device, and helps to improve the energy density of the energy storage device, and is beneficial to improving the overall performance of the energy storage device.

[0061] Based on the above overall introduction, in this embodiment, as an exemplary structure, in combination with Figure 1 and Figure 2 as shown, this embodiment also includes a power distribution unit 4 (Power Distribution Unit, PDU) arranged on the base 201. The power distribution unit 4 is electrically connected to the battery module 1 to regulate the energy of the battery module 1. The battery module 1 in this embodiment includes a plurality of battery cells 101. The large surfaces of the plurality of battery cells 101 are in contact with each other and are arranged in sequence in the accommodation cavity s to form a group of battery modules 1. The battery cells 101 are directly arranged in the accommodation cavity s, improving the space utilization rate, helping to improve the energy density, and being beneficial to the design implementation.

[0062] In combination with Figure 1 and Figure 2 as shown, the housing 2 is assembled by the base 201, the first plate body 203, the second plate body 204 and the third plate body 205. The third plate body 205 is clamped between the first plate body 203 and the second plate body 204 at the top of the housing 2. The base 201, as the installation base and main support structure of other components in the energy storage device, will be made of materials with high structural strength, such as channel steel can be used. The first plate body 203 and the second plate body 204 form the side protection of the energy storage device, and the third plate body 205 forms the top protection of the energy storage device. In order to achieve lightweight settings, it will be made of lighter materials with a certain structural strength, such as steel plates can be made by sheet metal bending.

[0063] In this embodiment, additional plate bodies can be set on the other two sides of the energy storage device for protection. However, generally speaking, multiple energy storage devices will be set. Multiple energy storage devices are arranged in a container, and insulating baffles are arranged between adjacent energy storage devices. Therefore, in this embodiment, no plate bodies are set on the other two sides of the energy storage device.

[0064] In combination with Figure 2 as shown, the cooling system 3 in this embodiment also includes a liquid chiller 302 arranged on the base 201. In order to improve the space utilization rate, the liquid chiller 302 is embedded in the base 201. The liquid chiller 302 is connected to each cold plate 301 through pipelines to form a cooling circuit. In order to ensure the structural strength of the cold plate 301, the cold plate 301 can be made of extruded aluminum profiles, for example, to increase the structural strength.

[0065] For the convenience of arranging the battery module 1, as shown in combination with Figure 2 , Figure 3 and Figure 5 , a limiting portion 206 is provided on the housing 2 in this embodiment. The limiting portion 206 constitutes a constraint on the cold plate 301 within the housing 2, so that the cold plate 301 contacts the outer surface of the battery module 1. Through the arrangement of the limiting portion 206, the battery module 1 can be better constrained within the accommodation cavity s, which is beneficial to ensuring the stable support of the cold plate 301 for the battery module, and enabling the cold plate 301 to contact the outer surface of the battery module to provide a better cooling effect for the battery module.

[0066] Specifically, as shown in combination with Figure 2 and Figure 3 , the limiting portion 206 of the energy storage device in this embodiment includes limiting grooves 2061 provided on the first plate body 203 and the second plate body 204. The end portions of the cold plate 301 in contact with the housing 2 are received within the limiting grooves 2061. Through the arrangement of the limiting grooves 2061, the assembly of the cold plate 301 within the housing 2 is more convenient, and the structure is simple, which is beneficial to design and implementation.

[0067] It should be noted that, for the convenience of arranging the cooling pipelines of the cold plate 301, an avoidance portion can be provided in the limiting groove 2061 corresponding to the cooling pipelines of the cold plate 301, so that the cooling pipelines of the cold plate 301 can be arranged within the limiting groove 2061, saving the space occupied within the housing 2, and thus being able to improve the energy density.

[0068] For the convenience of installing the cold plate 301 and the limiting groove 2061, as shown in combination with Figures 1 to 3 , through holes 2062 are formed on the limiting groove 2061 of the energy storage device in this embodiment. The cold plate 301 is fixed and held on the housing 2 by bolts passing through the through holes 2062. Through the cooperation of the through holes 2062 and the bolts, the installation of the cold plate 301 within the limiting groove 2061 is more convenient, the structure is simple, and it is beneficial to the installation operation.

[0069] For better constraining the battery module 1, as shown in combination with Figure 2 and Figure 5 , the limiting portion 206 of the energy storage device in this embodiment further includes a limiting strip 2063. The limiting strip 2063 is fixedly held on two opposite sides of the cold plate 301. A convex rib 2064 extends upward from the top of the limiting strip 2063, and the convex rib 2064 abuts against the battery module 1 to constitute a constraint on the battery module 1 located within the accommodation cavity s. Through the arrangement of the limiting strip 2063, the battery module located on the cold plate 301 can be better constrained, enabling the battery module to be stably arranged on the cold plate 301, which is beneficial to design and implementation.

[0070] Specifically, as shown in combination with Figure 5As shown, a cavity is formed in the limit strip 2063 in this embodiment. From the longitudinal direction of the energy storage device, the cavity in the limit strip 2063 is in a "mouth" shape, and the convex rib 2064 extends from one side of the limit strip 2063 close to the battery module 1 towards the top of the energy storage device to form a constraint on the battery module 1.

[0071] For the convenience of the rotational setting of the first plate body 203 and the second plate body 204 on the base 201, in combination with Figure 1 , Figure 2 and Figure 4 As shown, the rotating part 202 of the energy storage device in this embodiment includes a receiving groove 2021 provided on the base 201, and a convex block 2022 extending from the bottom of the first plate body 203 and the bottom of the second plate body 204 towards the base 201. When the first plate body 203 and the second plate body 204 are assembled on the base 201, the convex block 2022 is inserted into the receiving groove 2021. Through the insertion fit of the receiving groove 2021 and the convex block 2022, the stability of the overall structure is improved, and the convex block 2022 can be inserted into the receiving groove 2021 as a guide, facilitating the assembly and disassembly of the first plate body 203 and the second plate body 204 with the base 201. The structure is simple and beneficial for design implementation.

[0072] For the convenience of assembly, in combination with Figure 4 As shown, the rotating part 202 of the energy storage device in this embodiment further includes a pin shaft 2023. The pin shaft 2023 passes through the receiving groove 2021 and the convex block 2022 to form a rotational support for the first plate body 203 and the second plate body 204 on the base 201. Through the setting of the pin shaft 2023, the rotation of the first plate body 203 and the second plate body 204 on the base 201 is more stable, and the setting of the pin shaft 2023 facilitates the assembly and disassembly of the first plate body 203 and the second plate body 204 with the base 201.

[0073] For the convenience of the rotation of the rotating part 202, in combination with Figure 4 As shown, the end of the convex block 2022 of the energy storage device in this embodiment facing the receiving groove 2021 is arranged as an arc surface, making the end of the convex block 2022 arranged as an arc surface, which is beneficial for the rotation of the convex block 2022 in the receiving groove 2021, reducing the wear between the convex block 2022 and the base 201 during the rotation process, and improving the convenience of assembly, which is beneficial for design implementation.

[0074] To reduce the expansion of the battery module 1 during use, in combination with Figure 2 and Figure 3As shown in the figure, elastic layers 207 are provided on both the first plate body 203 and the second plate body 204 of the energy storage device in this embodiment. When the battery module 1 is assembled in the housing 2, the side surface of the battery module 1 compresses the elastic layer 207. Through the arrangement of the elastic layer 207, when the first plate body 203 and the second plate body 204 rotate and abut against the battery module 1, the elastic layer 207 is compressed. Due to the elasticity of the elastic layer 207 itself, a certain pre-tightening force is generated on the battery module, which is beneficial to providing a certain initial pre-tightening force to the battery module.

[0075] To save costs, in combination with Figure 2 As shown in the figure, the elastic layers 207 of the energy storage device in this embodiment are configured to be multiple and provided on the first plate body 203 and the second plate body 204. Each elastic layer 207 is arranged between two adjacent cold plates 301. The multiple elastic layers 207 correspond to the battery module 1 one by one. The elastic layers 207 are arranged corresponding to the battery module 1, which is beneficial to cost saving, and is convenient for the arrangement of other structures. The structure is simple and conducive to design and implementation.

[0076] Specifically, the elastic layer 207 in this embodiment can be, for example, elastic foam. Using elastic foam as the elastic layer 207 is convenient for processing and manufacturing, can provide excellent buffering and shock absorption capabilities, and the elastic foam is lighter, which is beneficial to the lightweight design of the device and helps with design and implementation.

[0077] During assembly, first insert the first plate body 203 and the second plate body 204 onto the base 201, insert the pin shaft 2023, arrange the elastic layer 207 on the first plate body 203 and the second plate body 204, then arrange the liquid cooler 302 on the base 201, arrange the power distribution unit 4 on top of the liquid cooler 302, then arrange a layer of cold plate 301 on the power distribution unit 4, arrange the battery module 1 on the cold plate 301, then arrange another layer of cold plate 301 on top of the battery module 1, and arrange them in sequence until the required number of layers is reached. Connect the liquid cooler 302 and the cold plate 301 through pipelines, electrically connect the power distribution unit 4 and each battery module 1 through wire harnesses, assemble the limit strip 2063 on the cold plate 301, assemble the third plate body 205 on the top of the housing 2, rotate the first plate body 203 and the second plate body 204 so that the elastic layer 207 abuts against the battery module 1, and fix the cold plate 301 to the first plate body 203 and the second plate body 204 by passing bolts through the through holes 2062, thus completing the assembly of the energy storage device.

[0078] In the energy storage device of this embodiment, the arrangement of the rotating part 202 facilitates the assembly of the energy storage device. Moreover, the cold plate 301 divides the inside of the housing 2 into multiple accommodation cavities s, which is conducive to improving the space utilization rate. And it can provide a better cooling effect for the battery module 1 through the cold plate 301, eliminating the need for an additional support structure for the battery module 1. Furthermore, in this embodiment, the battery module 1 is integrated by multiple battery cells 101, and the battery cells 101 are directly assembled into the accommodation cavities s, eliminating the additional structure of the battery module 1, improving the space utilization rate, helping to increase the energy density of the energy storage device, and thus being beneficial to improving the overall performance of the energy storage device.

[0079] The foregoing are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. An energy storage device, characterized in that, Comprising: A battery module; A housing, the housing including a base, a first plate body and a second plate body rotatably provided on two opposite sides of the base through a rotating part, and a third plate body fixedly held between the first plate body and the second plate body; A cooling system, the cooling system including a plurality of cold plates provided in the housing; The cold plates are arranged at intervals in the vertical direction between the first plate body and the second plate body, and the cold plates divide the housing into several accommodation cavities for accommodating the battery module.

2. The energy storage device according to claim 1, wherein: A limiting part is provided on the housing, and the limiting part constitutes a constraint of the cold plate in the housing so that the cold plate contacts the outer surface of the battery module.

3. The energy storage device according to claim 2, wherein: The limiting part includes limiting grooves provided on the first plate body and the second plate body, and the end parts of the cold plate in contact with the housing are received in the limiting grooves.

4. The energy storage device according to claim 3, wherein: Through holes are formed in the limiting grooves, and the cold plate is fixedly held on the housing by bolts passing through the through holes.

5. The energy storage device according to claim 3, wherein: The limiting part further includes limiting strips, the limiting strips are fixedly held on two opposite sides of the cold plate, and convex edges extend upward from the top of the limiting strips, and the convex edges abut against the battery module to constitute a constraint on the battery module located in the accommodation cavity.

6. The energy storage device according to any one of claims 1-5, wherein: The rotating part includes an accommodation groove provided on the base, and a convex block extending from the bottom of the first plate body and the bottom of the second plate body towards the base; When the first plate body and the second plate body are assembled on the base, the convex block is inserted into the accommodation groove.

7. The energy storage device according to claim 6, wherein: The rotating part further includes a pin shaft, and the pin shaft passes through the accommodation groove and the convex block to constitute a rotational support of the first plate body and the second plate body on the base; and / or, The end part of the convex block facing the accommodation groove is provided with an arc-shaped surface.

8. The energy storage device according to claim 7, wherein: Elastic layers are provided on both the first plate body and the second plate body. When the battery module is assembled in the housing, the side surface of the battery module compresses the elastic layers.

9. The energy storage device according to claim 8, wherein: The elastic layers are configured to be multiple and provided on the first plate body and the second plate body. Each elastic layer is provided between two adjacent cold plates, and the multiple elastic layers correspond to the battery modules one by one.

10. The energy storage device according to claim 9, wherein: The elastic layer is elastic foam.

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