Liquid-cooled battery pack

Abstract

The utility model discloses a liquid-cooled battery pack. The liquid-cooled battery pack comprises a box body, a battery module and a liquid-cooled plate module, the plurality of battery modules are arranged in the box body in parallel at intervals; fixing frame groups are bound on two sides of each battery module; the fixed frame group is fixed in the box body through bolts; the liquid cooling plate modules are laid on the two end surfaces of the plurality of battery modules, each liquid cooling plate module comprises a plurality of liquid cooling plates which are arranged in parallel, and the end parts of the adjacent liquid cooling plates are jointly sleeved with plug connectors used for communicating internal channels of the adjacent liquid cooling plates. According to the liquid-cooled battery pack provided by the utility model, when a single battery module fails, the single module can be replaced, and meanwhile, when the liquid-cooled plates are locally damaged, part of the liquid-cooled plates can be replaced; the whole battery pack does not need to be scrapped, so that the maintenance cost and cost are reduced.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery technology, and in particular to a liquid-cooled battery pack. Background Technology

[0002] Today, lithium-ion battery products are widely used in modern commerce, automotive, and industrial fields. In the process of integrating lithium-ion batteries into battery packs, the general assembly method is either cell-module-battery-pack or cell-battery-pack. During integration, welding, structural adhesives, and other methods are typically used to support, fix, and protect the cells, electrical components, structural components, and thermal management components. This ensures the cells are positioned correctly, prevents deformation that could impair their performance, meets current-carrying capacity requirements, and allows for temperature control.

[0003] However, in traditional battery pack assembly methods, if a cell or module malfunctions, it cannot be disassembled and replaced. This is especially true for liquid-cooled battery packs, where forceful disassembly can damage the liquid cooling plate, significantly increasing the difficulty of battery pack repair and even rendering the entire battery pack unusable, thus greatly increasing after-sales maintenance costs. Utility Model Content

[0004] The purpose of this invention is to provide a liquid-cooled battery pack that allows for the replacement of individual modules and some liquid cooling plates of the battery pack without damage.

[0005] To solve the above-mentioned technical problems, this utility model provides a liquid-cooled battery pack, including a housing, battery modules, and liquid-cooled plate modules; multiple battery modules are arranged side by side with gaps in the housing; each battery module has a fixing frame assembly installed on both sides; the fixing frame assembly is installed in the housing; the liquid-cooled plate modules are laid on both ends of the multiple battery modules; the liquid-cooled plate module includes multiple liquid-cooled plates arranged side by side, and the side walls of the liquid-cooled plates respectively contact the side walls of the fixing frame assembly on both sides of the battery modules; adjacent liquid-cooled plates are fitted with a common connector at their ends, and the connector is inserted into the gap between two battery modules.

[0006] Furthermore, the inner end face of the housing has a support frame, which is used to support the battery module and the liquid cooling plate module.

[0007] Furthermore, the support frame is provided with a plurality of receiving slots spaced apart to accommodate the plug-in components.

[0008] Furthermore, both ends of the connector have slots that match the ends of the liquid cooling plate, and the connector has multiple communication ports that respectively connect to the internal channels of the liquid cooling plate.

[0009] Furthermore, the connection between the connector and the liquid cooling plate is securely sealed with thermally conductive structural adhesive.

[0010] Furthermore, multiple fixing flanges are provided at both ends of the fixing frame assembly, and the fixing flanges have fixing holes for multiple mounting bolts.

[0011] Furthermore, multiple horizontal ribs connect the two sets of fixing frames on both sides of the battery module.

[0012] Furthermore, the fixed frame group includes multiple sheet metal frames, which are arranged at intervals.

[0013] Furthermore, the liquid cooling plate has multiple heat-conducting fins spaced apart on its end face, and these heat-conducting fins are inserted between two adjacent cells in the battery module.

[0014] Furthermore, the total output terminals of two adjacent battery modules are electrically connected via quick-connect copper busbars, which are connected to the total output terminals of the battery modules via bolts.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects:

[0016] The liquid-cooled battery pack provided by this utility model allows for the replacement of a single battery module when it fails, and also allows for the replacement of a portion of the liquid cooling plate when it is partially damaged; thus eliminating the need to scrap the entire battery pack and reducing maintenance costs and expenses. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the liquid-cooled battery pack in one embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram showing the arrangement of the battery module and the liquid cooling plate module in the housing of a liquid-cooled battery pack in one embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of the installation of the liquid-cooled battery pack support frame in one embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of the connector structure in a liquid-cooled battery pack according to one embodiment of the present invention;

[0021] Figure 5 This is a schematic diagram of the structure of the fixing frame assembly in a liquid-cooled battery pack according to one embodiment of the present invention;

[0022] Figure 6 This is a schematic diagram showing the connection of the total output terminals of adjacent battery modules in a liquid-cooled battery pack according to one embodiment of the present invention;

[0023] Figure 7This is a schematic diagram of the liquid cooling plate module in a liquid-cooled battery pack according to one embodiment of the present invention.

[0024] In the diagram: 1. Housing; 2. Battery module; 3. Liquid cooling plate module; 31. Liquid cooling plate; 32. Connector; 321. Slot; 322. Connecting port; 33. Heat-conducting fins; 4. Fixing frame assembly; 5. Fixing flange; 6. Support frame; 61. Receiving groove; 7. Horizontal rib; 8. Quick-connect copper busbar. Detailed Implementation

[0025] The liquid-cooled battery pack of this utility model will now be described in more detail with reference to the accompanying drawings, which illustrate preferred embodiments of the utility model. It should be understood that those skilled in the art can modify the utility model described herein while still achieving its advantageous effects. Therefore, the following description should be understood as being of general knowledge to those skilled in the art and is not intended to limit the utility model.

[0026] The present invention will be described in more detail below by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become clearer from the following description. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0027] like Figure 1 and Figure 2 As shown in the figure, this utility model embodiment proposes a liquid-cooled battery pack, including a housing 1, battery modules 2, and liquid-cooled plate modules 3; there are multiple battery modules 2, which are arranged side by side with gaps in the housing 1; each battery module 2 has a fixing frame group 4 installed on both sides; the fixing frame group 4 is installed in the housing 1; the liquid-cooled plate modules 3 are laid on both ends of the multiple battery modules 2, and the liquid-cooled plate modules 3 include multiple liquid-cooled plates 31 arranged side by side, the side walls of the liquid-cooled plates 31 respectively contacting the side walls of the fixing frame group 4 on both sides of the battery modules 2; the ends of adjacent liquid-cooled plates 31 are jointly sleeved with plugs 32, and the plugs 32 are inserted into the gap between two battery modules 2.

[0028] In this embodiment, the battery module 2 is bound to the housing 1 by the fixing frame group 4 and fixed to the housing 1 by bolts. Multiple liquid cooling plates 31 are connected by the plug-in piece 32. At the same time, the fixing frame group 4 and the plug-in piece 31 can limit the liquid cooling plate 31. After the housing 1 is sealed, the two ends of the housing 1 abut against the battery module 2 and the liquid cooling plate 31, so as to achieve stable installation of the battery module 2 and the liquid cooling plate module 3.

[0029] When a battery module 2 needs to be replaced, first open the cover of the housing 1, then remove the liquid cooling plate module 3, then disassemble the fixing frame group 4 on the battery module 2 from the housing 1, and then disassemble the connector of the total output terminal of the battery module 2. Then the battery module 2 can be taken out from the housing 1 to remove the battery module 2. The disassembly of the battery module 2 will not damage the liquid cooling plate during the disassembly process.

[0030] When a liquid cooling plate 31 in the liquid cooling plate module 3 is damaged, the structural adhesive at both ends of the liquid cooling plate 31 can be deactivated by using an adhesive remover, and the liquid cooling plate 31 can be removed and replaced individually without replacing all the liquid cooling plates 31, and without causing damage to the battery module 2.

[0031] Therefore, the liquid-cooled battery pack provided in this embodiment can replace a single battery module 2 when it fails, and can replace a portion of the liquid-cooled plate 31 when the liquid-cooled plate module 3 is partially damaged; without scrapping the entire battery pack, maintenance costs and expenses are reduced.

[0032] In the above implementation process, in conjunction with reference Figure 3 The inner end face of the housing 1 has a support frame 6, which is used to support the battery module 2 and the liquid cooling plate module 3. This ensures the stability of the liquid cooling plate module 3 while leaving a certain gap between the inner end face of the housing 1 and the liquid cooling plate module 3, thereby improving the heat dissipation effect of the liquid cooling plate module 3.

[0033] Furthermore, the support frame 6 is provided with a plurality of receiving slots 61 at intervals for accommodating the plug-in 5, ensuring effective contact between the support frame 6 and the liquid cooling plate 31.

[0034] In one embodiment, in conjunction with reference Figure 4 The connector 32 has slots 321 at both ends that match the ends of the liquid cooling plate 31, and the connector 32 has multiple connecting ports 322 that respectively connect to the internal channels of the liquid cooling plate 31. When connecting the two liquid cooling plates 31, simply insert the ends of the two liquid cooling plates 31 into the slots 321 at both ends of the connector 32, and then seal and fix them with thermally conductive structural adhesive.

[0035] Specifically, the structural adhesive is polyurethane-based, and its bonding strength should be greater than 5 MPa. The connection between the connector 32 and the liquid cooling plate 31 is sealed using thermally conductive structural adhesive, ensuring the stability and sealing of the connection between the connector 32 and the liquid cooling plate 31, while also facilitating disassembly of the connector 32 and the liquid cooling plate 31.

[0036] In one embodiment, multiple fixing flanges 5 are provided at both ends of the fixing frame assembly 4. Each fixing flange 10 has multiple fixing holes (not shown in the figure) for mounting bolts. By passing bolts through these fixing holes and tightening them to the end face of the housing 1, the battery module 2 installed within the fixing frame assembly 4 is securely mounted inside the housing 1. Simultaneously, the fixing frame assembly 4 is secured to the housing 1 with bolts, effectively reducing the risk of damage to the battery module 2 when it is disassembled from the housing 1.

[0037] Combined with reference Figure 5 The fixed frame group 4 includes multiple sheet metal frames, which are arranged at intervals. To further improve the stability of the battery module 2, multiple horizontal ribs 7 are connected between the two fixed frame groups 4 on both sides of the battery module 2.

[0038] Specifically, the sheet metal frame is formed by bending a sheet metal structure in one piece, with a welded connection at the bottom of the bend, and is fixed to the horizontal rib 7 by welding.

[0039] In one embodiment, in conjunction with reference Figure 6 The liquid cooling plate 3 has multiple heat-conducting fins 8 spaced apart on its end face, and the heat-conducting fins 8 are inserted between two adjacent cells in the battery module 2.

[0040] The heat dissipation effect is improved by setting up the heat-conducting fins 8.

[0041] In one embodiment, in conjunction with reference Figure 7 The two adjacent battery modules 2 are electrically connected to each other via quick-connect copper busbars 8, which are connected to the total output terminals of the battery module 1 via bolts.

[0042] Currently, welding is the most commonly used connection method. However, when replacing a single battery module 2, the weld points need to be removed, and then re-welded when a new battery module 2 is installed. This process is complex and carries a risk of damaging the overall output terminal. Using bolt-mounted quick-connect copper busbars 8 to achieve electrical connection between adjacent battery modules 2 facilitates the installation and removal of individual battery modules 2 and avoids the risk of damaging the overall output terminal during battery module 2 removal.

[0043] In summary, the liquid-cooled battery pack provided by this utility model allows for the replacement of a single battery module when it fails, and also allows for the replacement of a portion of the liquid cooling plate when it is partially damaged; thus eliminating the need to scrap the entire battery pack and reducing maintenance costs and expenses.

[0044] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A liquid-cooled battery pack, characterized in that, This includes the casing, battery module, and liquid cooling plate module; Multiple battery modules are arranged side-by-side with gaps inside the housing; Each battery module is equipped with a fixing frame assembly on both sides; the fixing frame assembly is installed inside the housing; the liquid cooling plate module is laid on both ends of the multiple battery modules. The liquid cooling plate module includes multiple liquid cooling plates arranged in parallel, and the two side walls of the liquid cooling plates are respectively in contact with the side walls of the fixing frame group on both sides of the battery module. The adjacent liquid cooling plates are fitted with a common connector at their ends, and the connector is inserted into the gap between the two battery modules.

2. The liquid-cooled battery pack as described in claim 1, characterized in that, The inner end face of the housing has a support frame, which is used to support the battery module and the liquid cooling plate module.

3. The liquid-cooled battery pack as described in claim 2, characterized in that, The support frame has multiple slots spaced apart to accommodate the connectors.

4. The liquid-cooled battery pack as described in claim 1, characterized in that, Both ends of the connector have slots that match the ends of the liquid cooling plate, and the connector has multiple communication ports that respectively connect to the internal channels of the liquid cooling plate.

5. The liquid-cooled battery pack as described in claim 1, characterized in that, The connection between the connector and the liquid cooling plate is securely sealed with thermally conductive structural adhesive.

6. The liquid-cooled battery pack as described in claim 1, characterized in that, The fixed frame assembly has multiple fixed flanges at both ends, and the fixed flanges have multiple mounting bolt holes.

7. The liquid-cooled battery pack as described in claim 1, characterized in that, Multiple horizontal ribs connect the two sets of fixed frame groups on both sides of the battery module.

8. The liquid-cooled battery pack as described in claim 1, characterized in that, The fixed frame group includes multiple sheet metal frames, which are arranged at intervals.

9. The liquid-cooled battery pack as described in claim 1, characterized in that, The liquid cooling plate has multiple heat-conducting fins spaced apart on its end face, and these fins are inserted between two adjacent cells in the battery module.

10. The liquid-cooled battery pack as described in claim 1, characterized in that, The total output terminals of two adjacent battery modules are electrically connected via quick-connect copper busbars, which are connected to the total output terminals of the battery modules via bolts.

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