Novel liquid cooling energy storage battery plug-in box

Abstract

The utility model relates to a novel liquid cooling energy storage battery plug-in box which comprises a lower box body, battery modules, a BMS (battery management system) and an upper cover, and one or more battery modules are electrically connected with the BMS and arranged in a cavity formed by the lower box body and the upper cover; the lower box body comprises a liquid cooling integrated bottom plate, a front coaming and a rear coaming, and the front coaming and the rear coaming are arranged at the two ends of the U-shaped liquid cooling integrated bottom plate respectively to form the groove-shaped lower box body; a cooling liquid flow channel is arranged in the liquid cooling integrated bottom plate, and a water inlet and a water outlet of the cooling liquid flow channel are arranged at the rear end of the liquid cooling integrated bottom plate; a maintenance opening capable of exposing the BMS is formed in the front end of the upper cover and can be covered by a maintenance cover plate. The utility model has the beneficial effects that the liquid cooling bottom plate is arranged at the bottom of the box body to support the battery cell, and the liquid cooling bottom plate is used for cooling and heating the bottom surface of the battery cell, so that the heat conduction and heat dissipation effects are outstanding; the structure design is reasonable, the size of the battery plug-in box can be reduced to the maximum extent, and the stability is high.

Description

Technical Field

[0001] The present invention belongs to the technical field of energy storage batteries, and in particular relates to a new type of liquid-cooled energy storage battery insertion box. Background Art

[0002] With the development of lithium battery energy storage technology, the utilization rate of large-scale energy storage systems is increasing day by day. As the basic unit of the energy storage system, the energy storage battery insertion box is designed to increase the utilization rate of the internal space of large-scale energy storage containers.

[0003] Compared with the traditional air-cooled energy storage battery box, although the air-cooled energy storage battery box technology is relatively mature, the heat dissipation method of the battery has the disadvantages of high energy consumption and low efficiency. The non-closed nature of the battery box will also be affected by external environmental factors, thus affecting the service life of the entire system and having high requirements for the placement environment of the energy storage system; the advantages of liquid cooling with relatively isolated from the external environment are gradually emerging. However, when some small liquid-cooled battery insertion boxes are placed inside the energy storage container, the liquid-cooled pipelines and wire harnesses between the battery clusters will occupy a large amount of the internal space of the container to a great extent, and there will also be a certain waste of the space between the battery clusters, increasing the cost and difficulty of subsequent maintenance. Therefore, a new type of liquid-cooled energy storage battery insertion box is proposed, which is beneficial to economy, practicality, safety, stability, etc. Summary of the Invention

[0004] To solve the above technical problems, the present invention provides a new type of liquid-cooled energy storage battery insertion box.

[0005] The technical solution adopted by the present invention is: a new type of liquid-cooled energy storage battery insertion box, including,

[0006] A lower box body, including a liquid-cooled integrated bottom plate, a front enclosure panel and a rear enclosure panel. The front enclosure panel and the rear enclosure panel are respectively arranged at both ends of the U-shaped liquid-cooled integrated bottom plate to form a trough-shaped lower box body; a coolant flow channel is arranged inside the liquid-cooled integrated bottom plate, and the water inlet and outlet of the coolant flow channel are both arranged at the rear end of the liquid-cooled integrated bottom plate; a module installation front beam is arranged at the front end of the liquid-cooled integrated bottom plate.

[0007] A battery module, arranged in the lower box body, including one or more groups.

[0008] A BMS, arranged on the module installation front beam and electrically connected to the battery module.

[0009] An upper cover, in a trough shape, capable of being buckled with the lower box body to form a cavity capable of accommodating the battery module.

[0010] Preferably, the liquid-cooled integrated bottom plate includes a left liquid-cooled bottom plate, a right liquid-cooled bottom plate and a middle liquid-cooled bottom plate, and the L-shaped left liquid-cooled bottom plate, the L-shaped right liquid-cooled bottom plate and the middle liquid-cooled bottom plate are provided with interconnected flow channels.

[0011] The liquid-cooled integrated bottom plate is provided with a plurality of coolant channels, and each coolant channel is provided with an independent water inlet and a water outlet.

[0012] Preferably, one of the coolant channels is U-shaped, with the water inlet provided at one end and the water outlet provided at the other end; a plurality of channel walls are provided in the coolant channel to form a plurality of channels;

[0013] The distance between the end of the channel wall near the water inlet and the end plate of the bottom plate is less than the distance between the end of the channel wall far from the water inlet and the end plate of the bottom plate; the distance between the end of the channel wall near the water outlet and the end plate of the bottom plate is greater than the distance between the end of the channel wall far from the water outlet and the end plate of the bottom plate; the distance between the end of the channel wall near the corner water inlet and the end plate of the bottom plate is greater than the distance between the end of the channel wall far from the corner water inlet and the end plate of the bottom plate.

[0014] Preferably, a maintenance port is provided at the front end of the upper cover, and a maintenance cover plate covers the maintenance port and is detachably connected to the upper cover;

[0015] The BMS is arranged on the module installation front beam corresponding to the maintenance port.

[0016] Preferably, the coverage range of the maintenance cover plate exceeds the maintenance port, and the maintenance cover plate and the upper cover are fixed by riveting bolts.

[0017] Preferably, it further includes an MSD, and the MSD is connected to the BMS through an MSD socket provided on the front apron.

[0018] Preferably, positive and negative output sockets and communication sockets are also provided on the front apron at the position corresponding to the BMS.

[0019] Preferably, a breather valve and a fire nozzle are provided on the upper cover.

[0020] Preferably, a module installation rear beam and a module installation middle beam are further provided in the lower box body, and the battery module is fixed in the lower box body through the above-mentioned module installation front beam, module installation middle beam and module installation rear beam.

[0021] Preferably, a thermal conductive structural adhesive is filled between the battery module and the liquid-cooled integrated bottom plate.

[0022] Preferably, an insulating PC sheet is also provided, which is bonded to the inner side of the upper cover or covers above the battery module.

[0023] The advantages and positive effects of the present invention are: by arranging a liquid-cooled bottom plate at the bottom of the box body to support the battery cells and using the liquid-cooled bottom plate to cool and heat the bottom surface of the battery cells, the heat conduction and heat dissipation effect is prominent; the structural design is reasonable, which can minimize the volume of the battery insertion box and has high stability. Description of the Drawings

[0024] Figure 1Explosion diagram of the overall structure of a new type of liquid-cooled energy storage battery cassette in an embodiment of the present utility model;

[0025] Figure 2 Schematic diagram of the overall structure of a new type of liquid-cooled energy storage battery cassette in an embodiment of the present utility model;

[0026] Figure 3 Schematic diagram of the lower box body structure in an embodiment of the present utility model;

[0027] Figure 4 Schematic diagram of the liquid-cooled integrated bottom plate structure in an embodiment of the present utility model;

[0028] Figure 5 Schematic diagram of the battery module in an embodiment of the present utility model;

[0029] Figure 6 Schematic diagram of the upper cover structure in an embodiment of the present utility model;

[0030] Figure 7 Schematic diagram of the flow channel in the liquid-cooled integrated bottom plate in an embodiment of the present utility model;

[0031] In the figure: 1. Upper cover; 101. Flange of the maintenance opening; 102. Riveted stud; 8. Breather valve; 9. Maintenance cover plate; 10. Fire nozzle; 2. Lower box body; 201. Rear enclosure; 2011. Rear beam for module installation; 202. Liquid-cooled integrated bottom plate; 2021. Left liquid-cooled bottom plate; 2022. Middle liquid-cooled bottom plate; 2023. Right liquid-cooled bottom plate; 20231. Lifting opening; 20232. Disassembly opening; 2024. Flow channel sealing plate; 2025. Water inlet 1; 2026. Water outlet 1; 2027. Water outlet 2; 2028. Water inlet 2; 204. Box body fixing ear; 205. Front enclosure; 2051. Communication socket; 2052. MSD socket; 2053. Positive and negative output sockets; 2054. Front beam for module installation; 206. BMS mounting seat; 3. Battery module; 4. BMS; 5. Communication socket; 6. MSD; 7. Positive and negative sockets; 11. BMS bracket. Detailed implementation manners

[0032] The embodiments of the present invention will be described below with reference to the accompanying drawings.

[0033] The present utility model relates to a new type of liquid-cooled energy storage battery cassette, as Figure 1 Figure 2As shown in the figure, it includes a lower box body 2, a battery module 3, a BMS, and an upper cover 1. One or more groups of battery modules 3 are electrically connected to the BMS and are all arranged in the cavity formed by the lower box body 2 and the upper cover 1. To facilitate the maintenance of the BMS inside the battery box, a maintenance port is provided at the front section of the upper cover 1. The maintenance port corresponds to the BMS panel. Without disassembling the battery cassette, the BMS can be repaired and inspected only by opening the maintenance port. When no maintenance is required, the maintenance port can be covered by a maintenance cover plate 9.

[0034] The lower box body 2 is composed of a liquid-cooled integrated bottom plate 202, a front panel 205, and a rear panel 201. The front panel 205 and the rear panel 201 are respectively arranged at both ends of the U-shaped liquid-cooled integrated bottom plate 202 to form a trough-shaped lower box body 2. At the front end and the rear end of the lower box body 2, a front module installation beam 2054 and a rear module installation beam 2011 are respectively provided. The battery module 3 is fixedly connected to the cross beam by bolts through the end plates at both ends; as Figure 3 shown, when the battery box body is relatively long, in order to improve the stability of the battery module 3, a middle module installation beam can also be set to be responsible for supporting the front and rear module installation beams; the lower box body 2 is divided into two parts, front and rear, and both can be installed with battery modules 3 with matching dimensions. The lower box body 2 and the upper cover 1 are buckled to form a battery box for accommodating the battery module 3, and the lower box body 2 and the upper cover 1 with matching shapes and sizes can be designed according to the shape and size of the battery module 3.

[0035] To solve the heat dissipation problem of the integrated battery box, the liquid-cooled integrated bottom plate 202 includes a left liquid-cooled bottom plate 2021, a right liquid-cooled bottom plate 2023, and a middle liquid-cooled bottom plate 2023. The left and right liquid-cooled bottom plates 2023 are provided with a hoisting port 20231 and a disassembly port 20232; the left liquid-cooled bottom plate 2021 and the right liquid-cooled bottom plate 2023 are L-shaped, the L-shaped vertical surface is a hollow structure, and the L-shaped bottom is provided with a flow channel, which is welded and sealed with the front and rear ports of the liquid-cooled bottom plate through a flow channel sealing plate 2024; the flow channel sealing plate 2024 is welded and sealed with the front and rear ports of the liquid-cooled bottom plate; the left liquid-cooled bottom plate 2021, the middle liquid-cooled bottom plate 2023, and the right liquid-cooled bottom plate 2023 are of aluminum profile structure and are connected by friction stir welding; the L-shaped left liquid-cooled bottom plate 2021, the L-shaped right liquid-cooled bottom plate 2023, and the middle liquid-cooled bottom plate 2023 are provided with interconnected flow channels; the liquid-cooled integrated bottom plate 202 is provided with multiple coolant flow channels, and each coolant flow channel is provided with an independent water inlet and a water outlet, and both the water inlet and the water outlet are arranged at the rear end of the liquid-cooled integrated bottom plate 202. As Figure 4 shown, in some embodiments of the present invention, two coolant flow channels are provided in the liquid-cooled integrated bottom plate 202. The first coolant flow channel is respectively provided with a first water outlet and a first water inlet, and the second coolant flow channel is respectively provided with a second water outlet and a second water inlet. The coolant enters the liquid-cooled floor flow channels through the first water inlet and the second water inlet at the rear panel of the battery cassette, and flows out from the corresponding first water outlet and the second water outlet for circulation. The lower box body 2 and the inlet (outlet) are integrally formed, which can reduce the leakage problem inside the box.

[0036] Separate the space for connecting the power line on the front panel of the battery box from the internal liquid cooling pipeline space of the container and make reasonable use of it, which is convenient for subsequent maintenance; with double water inlets and outlets, the coolant flow channels in the liquid cooling bottom plate of the lower box body 2 can cover the entire area of the liquid cooling bottom plate. The double-flow channel design of the liquid cooling bottom plate enables the coolant to quickly exchange heat with the battery module 3 with the integrated bottom plate as the medium; the liquid cooling integrated bottom plate 202 adopts a multi-channel parallel design, and the designed flow channel walls have different lengths to control the coolant flow velocity in each flow channel, ensuring that there will be no flow channel cavities and solving the problem of uneven heat dissipation in the long box body.

[0037] As Figure 7 As shown, the liquid cooling integrated bottom plate 202 includes multiple coolant flow channels. Each coolant flow channel is U-shaped, with a water inlet at one end and a water outlet at the other end. The bottom of the U-shaped flow channel far from the water inlet and the water outlet forms a corner water inlet; multiple flow channel walls are provided in the coolant flow channel to form multiple flow channels. There are distances between both ends of the flow channel wall and the bottom plate end plates that enclose both ends of the integrated coolant bottom plate. In order to ensure that the flow velocity of each flow channel is the same and can evenly cool the battery environment, a progressive flow channel is specifically set; the distance between the end of the flow channel wall near the water inlet and the bottom plate end plate is less than the distance between the end of the flow channel wall far from the water inlet and the bottom plate end plate; the distance between the end of the flow channel wall near the water outlet and the bottom plate end plate is greater than the distance between the end of the flow channel wall far from the water outlet and the bottom plate end plate; the distance between the end of the flow channel wall near the corner water inlet and the bottom plate end plate is greater than the distance between the end of the flow channel wall far from the corner water inlet and the bottom plate end plate.

[0038] In the present invention, a battery box with a longer length can be adopted. Correspondingly, the length of the liquid cooling integrated bottom plate 202 is longer. At the position near the water inlet, the flow velocity is the greatest. The lengthened flow channel is to increase the flow resistance. At the position farthest from the water inlet, the flow channel wall is the shortest to reduce the flow resistance. The overall design is progressive to balance the flow resistance and prevent flow channel cavities; through the design of the lengthened flow channel and the setting of the progressive flow channel wall, the coolant flow velocity in each flow channel is the same, avoiding the formation of cavities, enabling the coolant to cover the entire module, and improving the heat dissipation efficiency.

[0039] The BMS is installed on the front beam 2054 for module installation through the BMS bracket 11 and is electrically connected to the battery module 3; as Figure 6 shown, corresponding to the position of the BMS panel, a maintenance opening is provided at the front end of the upper cover 1, which can expose the BMS operation panel; the maintenance opening is covered by the maintenance cover plate 9, and the coverage range of the maintenance cover plate 9 exceeds the maintenance opening. A flanging 101 of the maintenance opening is provided at the edge of the maintenance opening, and the maintenance cover plate 9 and the upper cover 1 are fixed by riveting bolts; the maintenance cover plate 9 is arranged on the upper cover 1, which is beneficial to reducing the height of the lower box body 2, reducing the weight of the box body, and realizing a lightweight design. When the entire battery pack is installed and needs maintenance, the maintenance cover plate 9 is removed, and the replacement and debugging of the BMS can be realized.

[0040] On the front bulkhead 205, corresponding to the position of the BMS, there are also positive and negative output sockets 2053 and a communication socket 5, which can be used to plug in external connectors. The corresponding accessories are fixed to the front bulkhead 205 and the module installation front beam 2054 through bolt connections. It also includes an MSD, and the MSD is connected to the BMS through the MSD socket 2052 provided on the front bulkhead 205. In addition, there are also a breather valve 8 and a fire nozzle 10 on the upper cover 1. The fire nozzle 10 is connected to the fire-fighting device through the fire-fighting pipeline in the container. After a fire breaks out in the battery cells inside the battery box, the temperature sensing device detects the fire, and the fire extinguishing function is activated to perform fire extinguishing and safety treatment on the inside of the battery box; the breather valve 8, the maintenance cover plate 9 and the fire nozzle 10 are installed on the upper cover 1, and the maintenance cover plate 9 is arranged on the upper cover 1, which is beneficial to reducing the height of the lower box body 2, reducing the weight of the box body, and realizing lightweight design.

[0041] In order to ensure the insulation between the battery box body and the outside and protect the battery module 3, an insulating PC sheet can be pasted inside the upper cover 1 and / or an insulating PC sheet can be laid on the battery module 3. In addition, a thermally conductive structural adhesive can be filled or laid between the battery module 3 and the liquid-cooled integrated bottom plate 202 to solve the problem of uneven and insufficient contact between the battery module 3 and the liquid-cooled bottom plate. At the same time, the gap between the battery module 3 and the liquid-cooled bottom plate can be greatly compensated and the module can be effectively reinforced to improve the internal stability.

[0042] The large energy storage container applying the battery insertion box with the above structure can be applied to large power stations and mobile energy storage systems. The number and position of the battery insertion boxes can be changed according to different sizes and different performance parameters, and the battery box has a wide range of applications.

[0043] The following further illustrates the present utility model through specific embodiments.

[0044] Embodiment:

[0045] A new type of liquid-cooled energy storage battery insertion box includes a lower box body 2, a battery module 3, a BMS 4, an MSD 6 and an upper cover 1. The battery module 3 and the BMS are arranged in the cavity formed by the buckling of the lower box body 2 and the upper cover 1, and the MSD can be plugged on the outside of the box body and communicated with the BMS.

[0046] The lower box body 2 includes a liquid-cooled integrated bottom plate 202, a front enclosure panel 205 and a rear enclosure panel 201. The front enclosure panel 205 and the rear enclosure panel 201 are respectively arranged at both ends of the U-shaped liquid-cooled integrated bottom plate 202 to form a trough-shaped lower box body 2. Two coolant channels are provided in the liquid-cooled integrated bottom plate 202, and each coolant channel is provided with a water inlet and a water outlet, and both the water inlet and the water outlet are arranged at the rear end of the liquid-cooled integrated bottom plate 202. A front module installation beam 2054 is provided at the front end of the liquid-cooled integrated bottom plate 202, a rear module installation beam 2011 is provided at the rear end, and a middle module installation beam is provided in the middle. A plurality of battery modules 3 are fixedly arranged on the front, middle and rear module installation beams. A heat-conducting structural adhesive is filled between the battery module 3 and the liquid-cooled integrated bottom plate 202, which is beneficial to conducting heat of the battery module 3. The BMS is fixedly arranged on the front module installation beam 2054 through a BMS bracket 11 and is electrically connected to a plurality of battery modules 3. An insulating PC sheet is laid above the battery module 3.

[0047] The upper cover 1 is in a trough shape and can be buckled with the lower box body 2 and fixedly connected by bolts. A maintenance port is provided at the front end of the upper cover 1, and a flanging is formed at the edge of the maintenance port. The coverage range of the maintenance cover plate 9 exceeds the maintenance port. The maintenance cover plate 9 covers the maintenance port and is detachably connected to the upper cover 1 through a rivet bolt. A breather valve 8 and a fire nozzle 10 are also provided on the upper cover 1, and a fire-fighting device is provided inside the upper cover 1 and connected to the fire nozzle 10. A positive and negative output socket 2053 and a communication socket 5 are provided on the front enclosure panel 205, both of which are electrically connected to the BMS, and an MSD socket 2052 is also provided, which can be used to connect the MSD.

[0048] The above has described the embodiments of the present invention in detail, but the content described is only the preferred embodiments of the present invention and cannot be considered as limiting the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of the application of the present invention should still fall within the scope covered by the patent of the present invention.

Claims

1. A new type of liquid-cooled energy storage battery box, characterized in that: include, The lower box body comprises a liquid-cooled integrated bottom plate, a front panel and a rear panel, wherein the front panel and the rear panel are respectively arranged at two ends of the U-shaped liquid-cooled integrated bottom plate to form a groove-shaped lower box body; a coolant flow channel is arranged in the liquid-cooled integrated bottom plate, and a water inlet and a water outlet of the coolant flow channel are both arranged at the rear end of the liquid-cooled integrated bottom plate; a module installation front beam is arranged at the front end of the liquid-cooled integrated bottom plate; a module installation rear beam and a module installation middle beam are also arranged in the lower box body, and a battery module is fixed in the lower box body through the module installation front beam, the module installation middle beam and the module installation rear beam; The battery module is arranged in the lower box and includes one or more groups; A BMS, arranged on the module installation front beam and electrically connected to the battery module; The upper cover is groove-shaped and can be buckled with the lower box to form a cavity capable of accommodating the battery module; the liquid-cooled integrated bottom plate includes a left liquid-cooled bottom plate, a right liquid-cooled bottom plate and a middle liquid-cooled bottom plate, and the L-shaped left liquid-cooled bottom plate, the L-shaped right liquid-cooled bottom plate and the middle liquid-cooled bottom plate are provided with intercommunication flow channels; The liquid-cooled integrated bottom plate is provided with a plurality of cooling liquid flow channels, both ends of which are closed by bottom plate end plates, and each cooling liquid flow channel is provided with an independent water inlet and water outlet; One of the coolant flow channels is U-shaped, with the water inlet at one end and the water outlet at the other end; a plurality of flow channel walls are provided in the coolant flow channel to form a plurality of flow channels; The distance between the end of the flow channel wall near the water inlet and the end plate of the bottom plate is smaller than the distance between the end of the flow channel wall far from the water inlet and the end plate of the bottom plate; the distance between the end of the flow channel wall near the water outlet and the end plate of the bottom plate is larger than the distance between the end of the flow channel wall far from the water outlet and the end plate of the bottom plate; the distance between the end of the flow channel wall near the corner water outlet and the end plate of the bottom plate is larger than the distance between the end of the flow channel wall far from the corner water outlet and the end plate of the bottom plate.

2. The novel liquid-cooled energy storage battery box according to claim 1 is characterized in that: A maintenance opening is provided at the front end of the upper cover, and a maintenance cover plate covers the maintenance opening and is detachably connected to the upper cover; The BMS is arranged on the module installation front beam corresponding to the maintenance port.

3. The novel liquid-cooled energy storage battery box according to claim 2 is characterized in that: The maintenance cover plate covers a range exceeding the maintenance opening, and the maintenance cover plate and the upper cover are fixed by rivet bolts.

4. The novel liquid-cooled energy storage battery box according to claim 3 is characterized in that: It also includes an MSD, which is connected to the BMS via an MSD socket arranged on the front panel; positive and negative output sockets and a communication socket are also arranged on the front panel corresponding to the BMS position.

5. The novel liquid-cooled energy storage battery box according to any one of claims 1 to 4, characterized in that: The upper cover is provided with a ventilation valve and a fire-fighting nozzle.

6. The novel liquid-cooled energy storage battery box according to any one of claims 1 to 4, characterized in that: The battery module and the liquid-cooled integrated bottom plate are filled with heat-conducting structural adhesive.

7. The novel liquid-cooled energy storage battery box according to any one of claims 1 to 4, characterized in that: An insulating PC sheet is also provided, which is bonded to the inner side of the upper cover or covers the battery module.

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