Liquid-cooled battery plug-in box

Abstract

The utility model provides a liquid-cooled battery subrack which comprises a liquid-cooled plate, an upper cover assembly and a battery module, and the liquid-cooled plate is provided with a liquid-cooled cavity, and a water inlet and a water outlet which are connected with the liquid-cooled cavity; the upper cover assembly is hermetically connected to the upper end of the liquid cooling plate through the plug-in box fixing assembly, the upper cover assembly and the liquid cooling plate are assembled to form an installation space for installing a battery module, the upper cover assembly is provided with a low-voltage communication assembly, and the side part of the upper cover assembly is connected with the plug-in box maintenance panel and the high-voltage plug-in panel assembly; and the battery module is connected with the battery management unit, the direct current fuse assembly and the manual maintenance switch base. The heat dissipation capability of the battery module can be improved, and the safety of the battery cell and the battery plug-in box is effectively guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery plug -in box technical field especially relates to a liquid cooling battery plug -in box. BACKGROUND

[0002] The traditional battery plug -in box is formed by 20 square lithium iron phosphate battery cells in series, and the internal battery cells are cooled by forced air cooling. Due to the limitation of the cooling efficiency of forced air cooling and the complexity of the system flow channel, the temperature difference of the battery cells in the plug -in box is large, and the energy density of the whole plug -in box is low. Under the higher requirement of energy density in the market environment, the air cooling plug -in box cannot meet the use requirement. At the same time, the design of the traditional battery plug -in box is not comprehensive enough for the consideration of electrical safety, which may lead to system safety problems under adverse working conditions such as accidental short circuit. During the charging and discharging process of the equipment, various abnormal working conditions such as overcharge of the battery cell, overdischarge of the battery cell, too high temperature rise of the battery cell and equipment short circuit may exist. SUMMARY

[0003] The utility model aims at at least in certain extent solves one of the technical problems in the prior art. Therefore, the utility model embodiment provides a liquid cooling battery plug -in box, which can effectively guarantee the safety of the battery cell and the battery plug -in box.

[0004] The utility model embodiment provides a liquid cooling battery plug -in box, which comprises a liquid cooling plate, an upper cover assembly and a battery module, the liquid cooling plate has a liquid cooling cavity, and a water inlet and a water outlet connected with the liquid cooling cavity;The upper cover assembly is sealingly connected to the upper end of the liquid cooling plate through a plug -in box fixing assembly, and the upper cover assembly and the liquid cooling plate form an installation space for installing the battery module after assembly. The upper cover assembly is provided with a low-voltage communication assembly, and the side of the upper cover assembly is provided with a first window and a second window. The plug -in box maintenance panel is sealingly connected to the first window, and the high-voltage plug -in panel assembly is sealingly connected to the second window. The battery module is arranged in the installation space, and the battery module is connected with a battery management unit, a direct current fuse assembly and a manual maintenance switch base. The plug -in box maintenance panel is arranged close to the direct current fuse assembly and the manual maintenance switch base, and the high-voltage plug -in panel assembly is arranged close to the battery management unit and away from the low-voltage communication assembly.

[0005] In some embodiments, the upper cover assembly is connected with an upper cover sealing ring at the connection with the liquid cooling plate, the plug -in box maintenance panel is connected with a plug -in box maintenance panel sealing ring at the connection with the first window, and the high-voltage plug -in panel assembly is connected with a high-voltage plug -in panel assembly sealing ring at the connection with the second window.

[0006] In some embodiments, the battery module is fixed to the upper end of the liquid cooling plate through a heat-conducting structural adhesive and fastened by bolts.

[0007] In some embodiments, the upper end of the liquid cooling plate is fixedly connected with a rectangular flange for installing the battery module, and the inner side edge of the rectangular flange is provided with a guide bevel.

[0008] In some embodiments, the low-voltage communication assembly is arranged on the side of the first window away from the second window, and the low-voltage communication assembly 3 comprises a first communication connector and a second communication connector, which are arranged in a vertical direction.

[0009] In some embodiments, the liquid-cooled battery plug-in box further comprises a fire-fighting interface arranged above the first communication connector and the second communication connector, and the fire-fighting interface is adapted to introduce fire-fighting agents into the installation space.

[0010] In some embodiments, the high-voltage plug-in panel assembly comprises a manual maintenance switch socket, a positive power socket and a negative power socket, and the positive power socket and the negative power socket each have a foolproof structure.

[0011] In some embodiments, the DC fuse assembly comprises a DC fuse, a fuse holder and a PC insulating sheet, the DC fuse is fixedly connected to the liquid cooling plate through the fuse holder, and the PC insulating sheet is installed at the front end of the DC fuse.

[0012] In some embodiments, the plug-in box fixing assembly comprises a first plug-in box fixing assembly, a second plug-in box fixing assembly and a third plug-in box fixing assembly, the first plug-in box fixing assembly, the second plug-in box fixing assembly and the third plug-in box fixing assembly are arranged on the side of the upper cover assembly, the first plug-in box fixing assembly and the second plug-in box fixing assembly are adapted to compress the top fixing member in the system equipment, and the third plug-in box fixing assembly is adapted to be fixed with the bolts of the container, and the third plug-in box fixing assembly is coated with conductive paint on the contact surface fixed with the container.

[0013] In some embodiments, a plurality of lifting rings are fixedly connected to the outer side of the upper cover assembly. BRIEF DESCRIPTION OF DRAWINGS

[0014] The above and / or additional aspects and advantages of the present utility model will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:

[0015] Wherein:

[0016] Figure 1 FIG. 1 is a structural schematic view of a liquid-cooled battery plug-in box in the embodiments of the present utility model;

[0017] Figure 2 FIG. 4 is a structural schematic view of the guide inclined angle of the rectangular flange in FIG. 3; Figure 1

[0018] Figure 3 FIG. 6 is a structural schematic view of the low-voltage communication assembly and the fire-fighting interface in FIG. 5; Figure 1

[0019] Figure 4 Figure 1 ​​​Structure diagram of high-voltage plug-in panel assembly in

[0020] Figure 5 For Figure 1 Structure diagram of DC fuse assembly in

[0021] Figure 6 For Figure 1 Structure diagram of plug-in box fixing assembly and lifting ring in

[0022] Reference signs:

[0023] 1, liquid cooling plate; 2, battery module; 3, low-voltage communication assembly; 31, first communication connector; 32, second communication connector; 4, battery management unit; 5, plug-in box maintenance panel; 6, high-voltage plug-in panel assembly; 61, manual maintenance switch socket; 62, positive power socket; 63, negative power socket; 7, DC fuse assembly; 71, PC insulating sheet; 72, DC fuse; 73, fuse support; 8, manual maintenance switch base; 9, upper cover sealing ring; 10, high-voltage plug-in panel assembly sealing ring; 11, plug-in box maintenance panel sealing ring; 12, upper cover assembly; 13, plug-in box fixing assembly; 131, first plug-in box fixing assembly; 132, second plug-in box fixing assembly; 133, third plug-in box fixing assembly; 14, rectangular flange; 141, guide inclined angle; 15, fire-fighting interface; 16, lifting ring. DETAILED DESCRIPTION

[0024] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the drawings. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0025] The liquid-cooled battery plug-in box of the embodiments of the present application is described below with reference to the drawings.

[0026] As Figures 1-6As shown, the utility model embodiment proposes a kind of liquid cooling battery plug-in box, comprising: liquid cooling plate 1, upper cover assembly 12 and battery module 2, liquid cooling plate 1 has liquid cooling cavity and the water inlet and water outlet of connecting liquid cooling cavity;Upper cover assembly 12 is sealedly connected in the upper end of liquid cooling plate 1 by plug-in box fixing assembly 13, upper cover assembly 12 and liquid cooling plate 1 are assembled and form the mounting space for installing battery module 2, upper cover assembly 12 is equipped with low-voltage communication assembly 3, the side of upper cover assembly 12 is equipped with first window and second window, plug-in box maintenance panel 5 is sealedly connected at first window, high-voltage plug-in panel assembly 6 is sealedly connected at second window;Battery module 2 is located in mounting space, battery module 2 connects battery management unit 4, direct current fuse assembly 7, manual maintenance switch base 8, plug-in box maintenance panel 5 is located at the position close to direct current fuse assembly 7 and manual maintenance switch base 8, high-voltage plug-in panel assembly 6 is located at the position close to battery management unit 4 and away from low-voltage communication assembly 3.

[0027] The embodiment of the present application can improve the heat dissipation capacity of the battery module 2 by providing the liquid cooling plate 1. The safety of the battery cells and the battery plug-in box can be effectively guaranteed by providing the battery management unit 4, the high-voltage plug-in panel assembly 6 and the direct current fuse assembly 7. The upper cover assembly 12 is sealedly connected to the upper end of the liquid cooling plate 1 by the plug-in box fixing assembly 13, which can improve the assembly efficiency of the battery plug-in box.

[0028] Further, the inside of the liquid cooling battery plug-in box is composed of 48 square lithium iron phosphate battery cells connected in series, and the series connection adopts a laminated soft copper bar form. The U-shaped groove designed inside the copper bar can effectively absorb the expansion stress of the battery cells. The outlet end of the power socket is designed with a telescopic structure to improve the production efficiency.

[0029] Further, the communication cable and the high-voltage equipment are spatially isolated, which can improve the EMC performance of the product.

[0030] Further, by reasonably arranging the position of the temperature sampling point, temperature monitoring of more than 70% of the battery cells can be realized. Combined with 100% voltage collection and monitoring of the battery cells, the safety of the product can be effectively ensured, and the product life can be improved.

[0031] In some embodiments, as shown in Figure 1 The connection between the upper cover assembly 12 and the liquid cooling plate 1 is connected with an upper cover sealing ring 9. The connection between the plug-in box maintenance panel 5 and the first window is connected with a plug-in box maintenance panel sealing ring 11. The connection between the high-voltage plug-in panel assembly 6 and the second window is connected with a high-voltage plug-in panel assembly sealing ring 10. The sealing performance of the liquid cooling battery plug-in box can be effectively improved.

[0032] In some embodiments, the battery module 2 is fixed on the upper end of the liquid cooling plate 1 by a heat-conducting structural adhesive and is fastened by a bolt. The installation of the battery module 2 is more stable.

[0033] In some embodiments, as shown in Figure 2 The upper end of the liquid cooling plate 1 is fixedly connected with a rectangular flange 14 for mounting the battery module 2, and the inner side edge of the rectangular flange 14 is provided with a guide bevel 141. During assembly, there may be a problem of misalignment of the installation of the battery module 2. If misalignment occurs, it is likely to cause deformation or damage of the insulating sheet of the module end plate, resulting in insulation problems. Therefore, the inner side edge of the rectangular flange 14 of the liquid cooling plate 1 is designed with a guide bevel 141, which can effectively solve this problem.

[0034] In some embodiments, as shown in Figure 3 The low-voltage communication assembly 3 is arranged on the side of the first window away from the second window, and includes a first communication connector 31 and a second communication connector 32. The first communication connector 31 and the second communication connector 32 are arranged in the vertical direction.

[0035] During operation of the electrical equipment, if the communication wire harness and the power wire harness intersect, communication interference problems may occur. The entire liquid-cooled battery plug-in box is composed of 48 square lithium iron phosphate cells connected in series, with a rated voltage of 153.6V. In order to ensure stable operation of the equipment, reasonable voltage collection and temperature collection, and effective data transmission are the basis and guarantee for stable operation of the equipment. The first communication connector 31 and the second communication connector 32 are designed on the right side of the plug-in box, separated from the high-voltage wire harness on the left side, which can fundamentally solve the interference problem.

[0036] In some embodiments, as shown in Figure 3 The liquid-cooled battery plug-in box further includes a fire-fighting interface 15 arranged above the first communication connector 31 and the second communication connector 32. The fire-fighting interface 15 is adapted to introduce fire-fighting chemicals into the installation space, and can play a role in fire-fighting.

[0037] In some embodiments, as shown in Figure 4 The high-voltage plug-in panel assembly 6 includes a manual maintenance switch socket 61, a positive power socket 62, and a negative power socket 63. The positive power socket 62 and the negative power socket 63 each have an anti-fumble structure.

[0038] The manual maintenance switch socket 61 can conveniently open and close the direct current circuit, which is beneficial for maintenance. The positive power socket 62 and the negative power socket 63 adopt a physical anti-fumble design, which can effectively eliminate safety hazards caused by human wiring errors.

[0039] In some embodiments, as shown in Figure 5 The DC fuse assembly 7 includes a DC fuse 72, a fuse holder 73, and a PC insulating sheet 71. The DC fuse 72 is fixedly connected to the liquid cooling plate 1 through the fuse holder 73, and the PC insulating sheet 71 is installed at the front end of the DC fuse 72.

[0040] Further, the direct current fuse 72 is a 1500V direct current fuse. A 1500V direct current fuse is connected in series at the total positive output end, and is installed with the liquid cooling plate 1 through a fuse support 73. In order to meet the electrical insulation requirement, a PC insulating sheet 71 is installed in front of the direct current fuse 72, which can effectively ensure the electrical safety of the equipment.

[0041] In some embodiments, as shown in Figure 6 The first, second and third plug-in box fixing assemblies 131, 132 and 133 are arranged at the side of the upper cover assembly 12, the first and second plug-in box fixing assemblies 131 and 132 are suitable for pressing the top fixing part in the system equipment, and the third plug-in box fixing assembly 133 is suitable for being fixed with the bolt of the container, and the third plug-in box fixing assembly 133 is coated with conductive paint on the contact surface fixed with the container.

[0042] Further, the first, second and third plug-in box fixing assemblies 131, 132 and 133 are respectively provided with a plurality of.

[0043] The liquid-cooled battery plug-in box needs to be installed in the container or cabinet, and is expanded into a higher-capacity battery system through series boosting and parallel capacity expansion. The first and second plug-in box fixing assemblies 131 and 132 are used for pressing the top fixing part in the system equipment, and the bolt of the container in front of the third plug-in box fixing assembly 133 is fixed, so that the reliability of the plug-in box fixing can be ensured. The front surface of the third plug-in box fixing assembly 133 fixed with the container is coated with conductive paint, so that the effective grounding of the system can be ensured.

[0044] In some embodiments, as shown in Figure 6 The outer side of the upper cover assembly 12 is fixedly connected with a plurality of lifting rings 16. The lifting requirement during plug-in box production can be met.

[0045] Further, the four sides of the upper cover assembly 12 are respectively provided with lifting rings 16.

[0046] The production process of the liquid-cooled battery plug-in box is as follows: the liquid cooling plate 1 is uniformly coated with a heat-conducting structural adhesive, the four battery modules 2 are sequentially hung on the liquid cooling plate 1, the rectangular flanges 14 of the liquid cooling plate 1 are connected through the bolts at both ends, and the four battery modules 2 are connected as a whole through the structural parts, so that the shock resistance of the battery plug-in box can be improved. The series copper bars of the four battery modules 2, the battery management unit 4, the direct current fuse assembly 7, the manual maintenance switch base 8, the upper cover sealing ring 9, the high-voltage plug-in panel assembly sealing ring 10, the plug-in box maintenance panel sealing ring 11 and other components are sequentially installed, the prefabricated upper cover assembly 12 is fixed with the liquid cooling plate 1, and then the plug-in box maintenance panel 5 and the high-voltage plug-in panel assembly 6 are installed.

[0047] In the description of the present application, it should be understood that the terms "first", "second" are used only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features with "first", "second" can explicitly or implicitly include at least one of the features.

[0048] In the present application, unless otherwise expressly specified and limited, the terms "mounting", "connection", "connection" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise expressly limited. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0049] In the present application, the terms "some embodiments" and the like mean that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments and features of different embodiments described in the specification without contradiction.

[0050] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application. Those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A liquid-cooled battery pack, comprising: The utility model relates to a battery module installation structure of liquid cooling plate type, including: Liquid cooling plate, the liquid cooling plate has liquid cooling cavity and the water inlet and water outlet of connecting liquid cooling cavity; Upper cover assembly, the upper cover assembly is sealedly connected in the upper end of liquid cooling plate through the fixed assembly of box, the upper cover assembly is assembled with the liquid cooling plate and forms the installation space for installing battery module, the upper cover assembly is equipped with low pressure communication assembly, the side of upper cover assembly is equipped with first window and second window, the first window is sealedly connected box maintenance panel, the second window is sealedly connected high pressure plug-in panel assembly; Battery module, the battery module is located in the installation space, the battery module connects battery management unit, direct current fuse assembly, manual maintenance switch base, the box maintenance panel is located close to direct current fuse assembly and manual maintenance switch base position, high pressure plug-in panel assembly is located close to battery management unit and is away from low pressure communication assembly position.

2. The liquid-cooled battery pack of claim 1, wherein, The upper cover assembly is connected with the upper cover sealing ring at the connection of the liquid cooling plate, the box maintenance panel is connected with the box maintenance panel sealing ring at the connection of the first window, and the high pressure plug-in panel assembly is connected with the high pressure plug-in panel assembly sealing ring at the connection of the second window.

3. The liquid-cooled battery pack of claim 1, wherein, The battery module is fixed on the upper end of the liquid cooling plate by the heat-conducting structural adhesive and is fastened by bolts.

4. The liquid-cooled battery pack of claim 1, wherein, The upper end of the liquid cooling plate is fixedly connected with a rectangular flange for mounting the battery module, and the inner side edge of the rectangular flange is provided with a guide bevel.

5. The liquid-cooled battery pack of claim 1, wherein, The low-voltage communication assembly is located on the side of the first window away from the second window, and the low-voltage communication assembly includes a first communication connector and a second communication connector, which are arranged in a vertical direction.

6. The liquid-cooled battery pack of claim 5, wherein, It also includes a fire-fighting interface, which is located above the first communication connector and the second communication connector, and is adapted to introduce fire-fighting chemicals into the installation space.

7. The liquid-cooled battery pack of claim 1, wherein, The high-voltage plug-in panel assembly includes a manual maintenance switch socket, a positive power socket and a negative power socket, and the positive power socket and the negative power socket each have an anti-fooling structure.

8. The liquid-cooled battery pack of claim 1, wherein, The direct current fuse assembly includes a direct current fuse, a fuse holder and a PC insulating sheet, the direct current fuse is fixedly connected to the liquid cooling plate through the fuse holder, and the PC insulating sheet is installed at the front end of the direct current fuse.

9. The liquid-cooled battery pack of claim 1, wherein, The box fixing assembly includes a first box fixing assembly, a second box fixing assembly and a third box fixing assembly, the first box fixing assembly, the second box fixing assembly and the third box fixing assembly are located on the side of the upper cover assembly, the first box fixing assembly and the second box fixing assembly are adapted to press the top fixing part in the system equipment, and the third box fixing assembly is adapted to be fixed with the bolt of the container, and the third box fixing assembly is coated with conductive paint on the contact surface fixed with the container.

10. The liquid-cooled battery pack of claim 1, wherein, The outer side of the upper cover assembly is fixedly connected with a plurality of lifting rings.

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