Battery box

Abstract

The utility model provides a battery box. The battery box comprises a box body with an accommodating cavity; the liquid cooling plate is located in the containing cavity and provided with a liquid cooling flow channel for cooling liquid to flow; the battery module is attached to the liquid cooling plate, the liquid cooling plate is used for conducting heat exchange on the battery module, the battery module comprises a plurality of battery packs and a plurality of conductive pole pieces, the conductive pole pieces are used for connecting the two battery packs, and the conductive pole pieces are provided with grooves; and the flexible circuit board is arranged on the battery module, and at least part of the flexible circuit board is positioned in the groove. The space utilization rate of the battery box is improved.

Description

TECHNICAL FIELD

[0001] The application relates to a battery box and belongs to the technical field of new energy batteries. BACKGROUND

[0002] With the rapid development of electric vehicles, energy storage systems and other fields, the safety and reliability of batteries as core components are crucial. Electric vehicles are zero-emission compared with traditional fuel vehicles, not only replacing oil and reducing the emission of greenhouse gases and other atmospheric pollutants, but also eliminating lithium batteries to manufacture energy storage equipment for cascade utilization.

[0003] In the process of conceiving and implementing the present application, the applicant found that there are at least the following problems: the current research on battery grouping is still insufficient, mainly in the aspects of insufficient energy density, high integration and poor space utilization after grouping.

[0004] The foregoing narrative is to provide general background information and does not necessarily constitute the prior art. CONTENT OF THE UTILITY MODEL

[0005] The application provides a battery box, which improves the space utilization of the battery box.

[0006] The application provides a battery box, which comprises:

[0007] A box body having a containing cavity;

[0008] A liquid cooling plate located in the containing cavity, the liquid cooling plate having a liquid cooling flow channel for cooling liquid to flow;

[0009] A battery module attached to the liquid cooling plate, the liquid cooling plate being used for heat exchange of the battery module, the battery module comprising a plurality of battery groups and a plurality of conductive tabs, the conductive tabs being used for connecting two battery groups, and the conductive tabs having grooves;

[0010] A flexible circuit board arranged on the battery module, and at least part of the flexible circuit board being located in the grooves.

[0011] The application has the beneficial effects that: through the use of the flexible circuit board, the demand for traditional rigid connection is reduced, the thermal expansion and contraction and mechanical vibration of the battery module can be better adapted, and the reliability of the system is improved; the grooves of the conductive tabs provide a protective mounting position for the flexible circuit board, reduce the risk of physical damage to the circuit board, save space, and make the flexible circuit board and the battery module more closely attached, thereby improving the space utilization of the battery box.

[0012] In some optional embodiments, the conductive tabs have an included angle between the extension direction and the extension direction of the flexible circuit board.

[0013] It should be noted that by setting the included angle, the resistance and inductance can be reduced, the electrical performance can be improved, the efficiency and output capacity of the battery can be improved, the electromagnetic coupling effect between the conductive tab and the flexible circuit board can be reduced, thereby reducing electromagnetic interference (EMI), and the electrical performance and signal integrity of the battery system can be improved.

[0014] In some optional embodiments, the battery pack is provided with a pole, and the conductive tab is used to connect the poles of two adjacent battery packs.

[0015] Among them, the two poles of the two adjacent battery packs are diagonally arranged.

[0016] It should be noted that since the two poles are diagonally arranged, when the conductive tab is connected, the use of long copper bars can be avoided.

[0017] In some optional embodiments, the conductive tab is provided with a first accommodating groove for accommodating the pole.

[0018] The first accommodating groove is two, and the two first accommodating grooves are respectively located at both ends of the conductive tab along the extension direction of the conductive tab, and the groove is located between the two first accommodating grooves.

[0019] It should be noted that the first accommodating groove is used to accommodate the pole of the battery pack, to ensure the close contact between the conductive tab and the pole, thereby providing reliable electrical connection, reducing contact resistance, and improving current transmission efficiency.

[0020] In some optional embodiments, the flexible circuit board is provided with a welding portion, the conductive tab is provided with a second accommodating groove, the welding portion is welded to the conductive tab and located in the second accommodating groove.

[0021] It should be noted that the welding portion is located in the second accommodating groove of the conductive tab, which provides additional mechanical protection for the welding point, reduces the risk of external physical damage, and improves the durability of the connection. It can simplify the assembly process of the flexible circuit board and the conductive tab, reduce the complexity of alignment and fixation, and improve production efficiency.

[0022] In some optional embodiments, the welding portion is a nickel sheet.

[0023] It should be noted that the nickel sheet has good processability and adaptability, and can form a reliable welding connection with the flexible circuit board and the conductive tab.

[0024] In some optional embodiments, the box body includes a box cover, a frame, and a bottom guard plate, the box cover and the bottom guard plate are respectively located on both sides of the frame, and surround the accommodating cavity.

[0025] The battery box further comprises a lifting point connecting piece, and the box cover, the frame and the bottom guard plate are connected through the lifting point connecting piece.

[0026] It should be noted that the lifting point connector provides a stable connection mode to firmly combine the box cover, the frame and the bottom guard plate together, enhances the overall structural stability and impact resistance of the battery box. And using the lifting point connector can simplify the assembly process of the battery box, facilitate the quick assembly and disassembly of the box cover, the frame and the bottom guard plate, and improve the production efficiency and maintenance convenience.

[0027] In some optional embodiments, the lifting point connector comprises a first lifting point piece and a second lifting point piece connected together, the first lifting point piece is used for connecting the box cover and the frame;

[0028] The second lifting point piece is used for connecting the frame and the bottom guard plate, and the second lifting point piece comprises a second sleeve and a second locking nut, the frame has a hollow part, and the second sleeve extends into the hollow part;

[0029] The inside of the second sleeve has an internal thread structure, the outside of the second locking nut has an external thread structure, the external thread structure is locked in the internal thread structure, and the second sleeve is located on the outside of the bottom guard plate.

[0030] It should be noted that such a design can shorten the length of the second sleeve and the length of the second lifting point piece, save the bottom space of the lifting point connector, and increase the ground clearance of the whole vehicle.

[0031] In some optional embodiments, the battery box further comprises a water nozzle assembly, the water nozzle assembly comprises a mounting seat and a water nozzle joint;

[0032] The mounting seat is arranged on the liquid cooling plate, and the water nozzle joint is arranged on the mounting seat and is communicated with the liquid cooling flow channel of the liquid cooling plate.

[0033] It should be noted that the design of the water nozzle assembly enables the liquid cooling flow channel of the liquid cooling plate to be efficiently connected with the external cooling system. The water nozzle joint is fixed on the liquid cooling plate through the mounting seat, which ensures that the cooling liquid can smoothly enter and exit the liquid cooling flow channel, realizing efficient heat management.

[0034] In some optional embodiments, the size of the mounting seat is larger than the size of the water nozzle joint.

[0035] It should be noted that such a design can prevent the water nozzle joint from being knocked and deformed and damaged during transportation.

[0036] The battery box provided by the application comprises a box body having a containing cavity, a liquid cooling plate located in the containing cavity, the liquid cooling plate having a liquid cooling flow channel for cooling liquid to flow, a battery module attached to the liquid cooling plate, the liquid cooling plate being used for heat exchange of the battery module, the battery module comprising a plurality of battery groups and a plurality of conductive tabs, the conductive tabs being used for connecting two battery groups, the conductive tabs having grooves, and a flexible circuit board arranged on the battery module and at least part of the flexible circuit board being located in the grooves.

[0037] By using the flexible circuit board, the need for traditional rigid connection is reduced, better adaptation to thermal expansion and contraction and mechanical vibration of the battery module is achieved, and the reliability of the system is improved; the recess design of the conductive tab provides a protective mounting position for the flexible circuit board, reduces the risk of physical damage to the circuit board, saves space, and makes the flexible circuit board and the battery module fit more closely, improving the space utilization of the battery box. BRIEF DESCRIPTION OF DRAWINGS

[0038] The above and other objects, features and advantages of the embodiments of the present application will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings. In the drawings, various embodiments of the present application are illustrated by way of example and not limitation in which:

[0039] Figure 1 is a partial explosion schematic diagram of the battery box of the embodiments of the present application;

[0040] Figure 2 is a partial enlarged view of I in FIG. 1; Figure 1

[0041] Figure 3 is a structural schematic diagram of the conductive tab in the battery box of the embodiments of the present application;

[0042] Figure 4 is a structural schematic diagram of the lifting point connecting piece in the battery box of the embodiments of the present application;

[0043] Figure 5 is an assembly sectional view of the lifting point connecting piece and the battery box in the battery box of the embodiments of the present application;

[0044] Figure 6 is a structural schematic diagram of the mounting seat in the battery box of the embodiments of the present application;

[0045] Figure 7 is a structural schematic diagram of the water nozzle joint in the battery box of the embodiments of the present application.

[0046] Reference signs:

[0047] 100 - battery box;

[0048] 110 - box body;

[0049] 111 - frame;

[0050] 112 - bottom guard plate;

[0051] 120 - liquid cooling plate;

[0052] 130 - battery module;

[0053] 131 - battery pack; ​

[0054] 1311-Pole Column;

[0055] 132 - Conductive electrode sheet;

[0056] 1321 - First receiving tank;

[0057] 1322 - Second receiving tank;

[0058] 1323 - Groove;

[0059] 140 - Flexible circuit board;

[0060] 141 - Welding section;

[0061] 150 - Lifting point connector;

[0062] 151 - First lifting point component;

[0063] 1511 - First Sleeve;

[0064] 1512 - First locking nut;

[0065] 152 - Second lifting point component;

[0066] 1521 - Second sleeve;

[0067] 1522 - Second locking nut;

[0068] 160 - Water tap assembly;

[0069] 161 - Mounting bracket;

[0070] 162 - Water tap connector;

[0071] 170 - Supporting foam. Detailed Implementation

[0072] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. All other obtained embodiments are within the scope of protection of this application. In the absence of conflict, the following embodiments and features can be combined with each other.

[0073] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0074] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0075] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0076] In the process of conceiving and implementing this application, the applicant discovered at least the following problems: Current research on battery pack assembly is still insufficient, mainly reflected in the insufficient energy density and integration after assembly, and poor space utilization.

[0077] The battery box proposed in this application reduces the need for traditional rigid connections by using flexible circuit boards, which can better adapt to the thermal expansion and contraction and mechanical vibration of the battery module and improve the reliability of the system. The groove design of the conductive electrode plate provides a protective mounting position for the flexible circuit board, reducing the risk of external physical damage to the circuit board, while saving space and making the flexible circuit board fit more tightly with the battery module, thus improving the space utilization of the battery box.

[0078] The battery box provided in this application will be described in detail below with reference to specific embodiments.

[0079] Figure 1 This is a partial exploded view of the battery box according to an embodiment of this application. Figure 2 for Figure 1 A magnified view of a section at point I. Figure 3 This is a schematic diagram of the structure of the conductive electrode sheet in the battery box according to an embodiment of this application.

[0080] like Figures 1 to 3 As shown in the figure, this application embodiment proposes a battery box 100, including:

[0081] Box 110 has a receiving cavity;

[0082] The liquid cooling plate 120 is located inside the receiving cavity and has a liquid cooling flow channel for the flow of coolant;

[0083] The battery module 130 is attached to the liquid cooling plate 120. The liquid cooling plate 120 is used to exchange heat for the battery module 130. The battery module 130 includes multiple battery packs 131 and multiple conductive electrode plates 132. The conductive electrode plates 132 are used to connect two battery packs 131. The conductive electrode plates 132 have grooves 1323.

[0084] A flexible circuit board 140 is disposed on the battery module 130, and at least a portion of the flexible circuit board 140 is located within a recess 1323.

[0085] It should be noted that the liquid cooling plate 120 provides an effective heat dissipation path for the battery module 130 through liquid cooling channels. The coolant flows in the channels, carrying away the heat generated by the battery module 130, thereby keeping the battery's operating temperature within a safe range and improving battery performance and lifespan.

[0086] In some embodiments, the liquid cooling plate 120 can be a stamped liquid cooling plate 120, which is spliced ​​by brazing aluminum plates. In order to achieve lightweighting, thinner materials are used for both the upper and lower plates, while having more efficient thermal management performance. In addition, the water nozzle is external, which is convenient for installation and also reduces the configuration of joints and hoses inside the box.

[0087] Specifically, if the liquid cooling plate 120 can be a stamped liquid cooling plate 120, then the housing 110 includes a bottom protective plate 112 to support the liquid cooling plate 120 and improve its strength.

[0088] In one possible implementation, the housing 110 can be a rectangular structure, and the size of the housing 110 can be greater than or equal to the size of the battery module 130, so that the housing 110 can support the battery module 130.

[0089] It is understandable that the purpose of the receiving cavity is to house the battery module 130. It is also easy to understand that the receiving cavity is sealed to prevent side reactions from occurring in the internal system of the battery cell in the battery module 130, which would affect the performance of the battery cell.

[0090] For example, the size or shape of the receiving cavity is matched with the size and shape of the battery module 130. Specifically, it can be adjusted according to the actual situation. This application embodiment does not impose too many restrictions here.

[0091] In this embodiment, the battery module 130 can be configured as a rectangular structure. The battery module 130 can be located inside the housing 110.

[0092] Understandably, the housing 110 can be used to support the battery module 130.

[0093] The dimensions of the aforementioned housing 110 can be set according to actual needs, and this embodiment of the application does not impose any restrictions on them.

[0094] In addition, it should be noted that the shape of the box 110 is not limited in this embodiment. For example, the box 110 can be a regular shape such as a cuboid or a cylinder. Of course, the box 110 can also be other irregular shapes.

[0095] It should be noted that the flexible circuit board 140 can connect various battery cells, sensors, and control modules within the battery box 100, providing electrical connection paths. It can be used to transmit various signals within the battery box 100, including voltage, current, and temperature information, supporting the normal operation of the battery management system (BMS).

[0096] In some designs, the flexible circuit board 140 may also integrate a thermistor or be used for heat dissipation to help manage the temperature of the battery box 100.

[0097] The conductive electrode sheet 132 has a groove 1323, which can accommodate at least part of the flexible circuit board 140, providing installation space for the flexible circuit board 140 and improving space utilization.

[0098] Through the above-mentioned configuration, namely the use of flexible circuit board 140, the need for traditional rigid connections is reduced, which can better adapt to the thermal expansion and contraction and mechanical vibration of battery module 130 and improve the reliability of the system. The groove 1323 of conductive electrode sheet 132 provides a protective mounting position for flexible circuit board 140, reducing the risk of circuit board being damaged by external physical forces, while saving space and making the flexible circuit board 140 fit more tightly with battery module 130, thus improving the space utilization of battery box 100.

[0099] like Figures 1 to 3As shown, in some alternative embodiments, there is an angle between the extending direction of the conductive electrode sheet 132 and the extending direction of the flexible circuit board 140.

[0100] It should be noted that by setting the included angle, resistance and inductance can be reduced, electrical performance can be improved, battery efficiency and output capability can be enhanced, electromagnetic coupling effect between conductive electrode sheet 132 and flexible circuit board 140 can be reduced, thereby reducing electromagnetic interference (EMI) and improving the electrical performance and signal integrity of the battery system.

[0101] The angled design allows for more flexible arrangement of the circuit board and conductive electrode 132, resulting in a more compact overall layout and optimized space utilization inside the battery box 100.

[0102] In other words, the conductive electrode sheet 132 and the flexible circuit board 140 are arranged in a cross configuration.

[0103] like Figure 1 and Figure 2 As shown, in some optional embodiments, the battery pack 131 is provided with terminals 1311, and conductive electrode plates 132 are used to connect the terminals 1311 of two adjacent battery packs 131.

[0104] In this configuration, the two terminals 1311 in two adjacent battery packs 131 are arranged diagonally.

[0105] It should be noted that since the two poles 1311 are arranged diagonally, the use of long copper busbars can be avoided when the conductive electrode plates 132 are connected.

[0106] The diagonally arranged electrode post 1311 design makes the current path more uniform, reduces areas with excessively high current density, thereby reducing resistance loss and improving the overall power transmission efficiency of the battery pack 131.

[0107] It should be noted that the two pole posts 1311 are set diagonally, which specifically means that the two pole posts 1311 are set at opposite angles.

[0108] Furthermore, there are multiple battery modules 130, which are arranged along the width direction of the battery box 100. Each battery module 130 includes multiple battery packs 131, which are arranged along the length direction X of the battery box 100.

[0109] The flexible circuit board 140 is arranged along the length direction X of the battery box 100, and the conductive electrode sheet 132 is connected to the two terminals 1311 of the two battery packs 131 along the width direction Y of the battery box 100.

[0110] The two terminals 1311 in the two battery packs 131 refer to the terminal 1311 of one battery pack 131 and the terminal 1311 of the other battery pack 131 in the two battery packs 131, meaning one terminal 1311 for each battery pack 131.

[0111] like Figures 1 to 3 As shown, in some optional embodiments, the conductive electrode sheet 132 is provided with a first receiving groove 1321, which is used to receive the electrode post 1311;

[0112] There are two first receiving grooves 1321. Along the extension direction of the conductive electrode sheet 132, the two first receiving grooves 1321 are located at both ends of the conductive electrode sheet 132, and the groove 1323 is located between the two first receiving grooves 1321.

[0113] It should be noted that the first receiving groove 1321 is used to receive the terminal post 1311 of the battery pack 131, ensuring close contact between the conductive electrode plate 132 and the terminal post 1311, thereby providing a reliable electrical connection, reducing contact resistance, and improving current transmission efficiency.

[0114] By providing first receiving grooves 1321 at both ends of the conductive electrode sheet 132, the pole post 1311 can be securely fixed on the conductive electrode sheet 132, which enhances the mechanical stability of the connection and reduces the risk of connection loosening due to vibration or impact.

[0115] In addition, the design of the first receiving slot 1321 makes the installation and alignment of the terminal post 1311 simpler and more precise, which facilitates the assembly and subsequent maintenance of the battery pack 131.

[0116] Furthermore, the recess 1323 is located between the two first receiving slots 1321, providing mounting space for the flexible circuit board 140 or other components, optimizing the space utilization inside the battery pack 131, and allowing for a more compact design.

[0117] like Figures 1 to 3 As shown, in some optional embodiments, the flexible circuit board 140 is provided with a welding part 141, and the conductive electrode sheet 132 is provided with a second receiving groove 1322. The welding part 141 is welded to the conductive electrode sheet 132 and is located in the second receiving groove 1322.

[0118] It should be noted that the welding part 141 is located within the second receiving groove 1322 of the conductive electrode sheet 132. This embedded design provides additional mechanical protection for the welding point, reduces the risk of external physical damage, and improves the durability of the connection. It simplifies the assembly process of the flexible circuit board 140 and the conductive electrode sheet 132, reduces the complexity of alignment and fixing, and improves production efficiency.

[0119] Furthermore, by placing the welded part 141 within the second receiving groove 1322, the welding position can be better fixed, displacement during the welding process can be reduced, and the welding quality and reliability of the connection can be improved.

[0120] Furthermore, this design effectively utilizes the thickness of the conductive electrode sheet 132, avoiding the addition of extra height to the solder part 141 on the surface of the flexible circuit board 140, thereby maintaining the compactness of the overall structure.

[0121] In some alternative embodiments, the weld portion 141 is a nickel sheet.

[0122] It should be noted that the nickel sheet has good machinability and adaptability, and can form a reliable weld connection with the flexible circuit board 140 and the conductive electrode sheet 132.

[0123] Because nickel has good electrical conductivity, using nickel sheets as the weld 141 can ensure efficient current transmission, reduce resistance loss, and improve the overall electrical performance of the battery system.

[0124] Furthermore, nickel possesses excellent corrosion resistance, maintaining stable performance under harsh environmental conditions and extending the service life of the welded joint. The use of nickel sheets can improve the mechanical strength of the weld 141, ensuring the stability and reliability of the connection under vibration or mechanical stress.

[0125] Figure 4 This is a structural schematic diagram of the lifting point connector in the battery box according to an embodiment of this application. Figure 5 This is a cross-sectional view of the assembly of the lifting point connector and the battery box in an embodiment of this application.

[0126] like Figures 1 to 5 As shown, in some optional embodiments, the box 110 includes a box cover, a frame 111 and a bottom protective plate 112, with the box cover and the bottom protective plate 112 located on both sides of the frame 111 and forming a receiving cavity.

[0127] The battery box 100 also includes a lifting point connector 150, and the box cover, frame 111 and bottom protective plate 112 are connected by the lifting point connector 150.

[0128] It should be noted that the lifting point connector 150 provides a robust connection method, firmly combining the cover, frame 111, and bottom protective plate 112 together, enhancing the overall structural stability and impact resistance of the battery box 100. Furthermore, using the lifting point connector 150 simplifies the assembly process of the battery box 100, facilitating the rapid assembly and disassembly of the cover, frame 111, and bottom protective plate 112, thereby improving production efficiency and ease of maintenance.

[0129] In some embodiments, the frame 111 has two openings, with a cover disposed at the upper opening of the frame 111 and a bottom cover 112 disposed at the lower opening of the frame 111, thereby forming a sealed receiving cavity to better accommodate the battery module 130 and the liquid cooling plate 120.

[0130] In some embodiments, the battery box 100 further includes a support foam 170 located between the bottom protective plate 112 and the liquid cooling plate 120 to support the liquid cooling plate 120.

[0131] like Figures 1 to 5 As shown, in some optional embodiments, the lifting point connector 150 includes a first lifting point 151 and a second lifting point 152 connected together, the first lifting point 151 being used to connect the box cover and the frame 111;

[0132] The second lifting point 152 is used to connect the frame 111 and the bottom guard plate 112. The second lifting point 152 includes a second sleeve 1521 and a second locking nut 1522. The frame 111 has a hollow part, and the second sleeve 1521 extends into the hollow part.

[0133] The second sleeve 1521 has an internal thread structure, and the second locking nut 1522 has an external thread structure. The external thread structure is locked to the internal thread structure, and the second sleeve 1521 is located on the outside of the bottom guard plate 112.

[0134] It should be noted that this configuration can shorten the length of the second sleeve 1521 and the second lifting point 152, saving the bottom space of the lifting point connector 150 and increasing the ground clearance of the entire vehicle.

[0135] The first lifting point 151 is used to connect the cover and the frame 111, while the second lifting point 152 is used to connect the frame 111 and the bottom protective plate 112. This modular connection method allows the various parts of the battery box 100 to be assembled and disassembled independently, improving assembly efficiency and maintenance convenience.

[0136] The design of the second lifting point 152 provides a stable connection through the cooperation of the second sleeve 1521 and the second locking nut 1522. The second sleeve 1521 extends into the hollow part of the frame 111, and the locking structure of the internal and external threads ensures a tight connection between the frame 111 and the bottom guard plate 112, enhancing the overall structural stability of the battery box 100.

[0137] In some embodiments, the first lifting point 151 includes a first sleeve 1511 and a first locking nut 1512. The first sleeve 1511 is inserted into the box cover and the frame 111. The first locking nut 1512 is screwed into the first sleeve 1511 and presses down on the box cover to connect the box cover and the frame 111.

[0138] Figure 6 This is a schematic diagram of the mounting bracket in the battery box according to an embodiment of this application. Figure 7 This is a schematic diagram of the water tap connector in the battery box according to an embodiment of this application.

[0139] like Figures 1 to 7 As shown, in some alternative embodiments, the battery box 100 also includes a water tap assembly 160, which includes a mounting base 161 and a water tap connector 162.

[0140] Mounting base 161 is provided on liquid cooling plate 120, and water nozzle connector 162 is provided on mounting base 161 and connected to liquid cooling flow channel of liquid cooling plate 120.

[0141] It should be noted that the design of the water nozzle assembly 160 enables the liquid cooling channel of the liquid cooling plate 120 to be efficiently connected to the external cooling system. The water nozzle connector 162 is fixed to the liquid cooling plate 120 by the mounting base 161, ensuring that the coolant can smoothly enter and exit the liquid cooling channel, achieving efficient thermal management.

[0142] The modular design of the faucet assembly 160 makes installation and disassembly easier. The mounting base 161 is fixed to the liquid cooling plate 120, and the faucet connector 162 can be quickly connected or disconnected, facilitating the installation, maintenance, and replacement of the system.

[0143] like Figures 1 to 7 As shown, in some alternative embodiments, the size of the mounting base 161 is larger than the size of the faucet connector 162.

[0144] It should be noted that this design prevents the faucet connector 162 from being bumped or knocked during transportation, which could cause it to deform or be damaged.

[0145] The larger mounting base 161 provides a larger contact area and support surface, making the water tap connector 162 more securely fixed on the liquid cooling plate 120 and reducing loosening or displacement caused by vibration or mechanical stress.

[0146] The battery box provided in this application embodiment includes: a box body having a receiving cavity; a liquid cooling plate located in the receiving cavity, the liquid cooling plate having a liquid cooling channel for coolant flow; a battery module attached to the liquid cooling plate, the liquid cooling plate being used for heat exchange of the battery module, the battery module including multiple battery packs and multiple conductive electrode plates, the conductive electrode plates being used to connect two battery packs, the conductive electrode plates having grooves; and a flexible circuit board disposed on the battery module, with at least a portion of the flexible circuit board located within the grooves.

[0147] The use of flexible circuit boards reduces the need for traditional rigid connections, better adapts to the thermal expansion and contraction and mechanical vibration of battery modules, and improves system reliability. The groove design of the conductive electrode sheet provides a protective mounting position for the flexible circuit board, reducing the risk of external physical damage to the circuit board, while saving space and allowing the flexible circuit board to fit more tightly with the battery module, thus improving the space utilization of the battery box.

[0148] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0149] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0150] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A battery box (100), characterized in that, include: The housing (110) has a receiving cavity; A liquid cooling plate (120) is located within the receiving cavity, and the liquid cooling plate (120) has a liquid cooling channel for the flow of coolant; A battery module (130) is attached to the liquid cooling plate (120), the liquid cooling plate (120) is used to exchange heat with the battery module (130), the battery module (130) includes multiple battery packs (131) and multiple conductive electrode plates (132), the conductive electrode plates (132) are used to connect two battery packs (131), and the conductive electrode plates (132) have grooves (1323); A flexible circuit board (140) is disposed on the battery module (130), and at least a portion of the flexible circuit board (140) is located within the groove (1323).

2. The battery box (100) according to claim 1, characterized in that, There is an angle between the extending direction of the conductive electrode sheet (132) and the extending direction of the flexible circuit board (140).

3. The battery box (100) according to claim 1, characterized in that, The battery pack (131) is provided with terminals (1311), and the conductive electrode sheet (132) is used to connect the terminals (1311) of two adjacent battery packs (131); In this configuration, the two terminals (1311) in two adjacent battery packs (131) are arranged diagonally.

4. The battery box (100) according to claim 3, characterized in that, The conductive electrode sheet (132) is provided with a first receiving groove (1321), which is used to receive the electrode post (1311); There are two first receiving grooves (1321). Along the extension direction of the conductive electrode sheet (132), the two first receiving grooves (1321) are located at the two ends of the conductive electrode sheet (132), and the groove (1323) is located between the two first receiving grooves (1321).

5. The battery box (100) according to any one of claims 1-4, characterized in that, The flexible circuit board (140) is provided with a welding part (141), and the conductive electrode sheet (132) is provided with a second receiving groove (1322). The welding part (141) is welded to the conductive electrode sheet (132) and is located in the second receiving groove (1322).

6. The battery box (100) according to claim 5, characterized in that, The welded part (141) is a nickel sheet.

7. The battery box (100) according to any one of claims 1-4, characterized in that, The box body (110) includes a box cover, a frame (111) and a bottom protective plate (112). The box cover and the bottom protective plate (112) are located on both sides of the frame (111) and form the receiving cavity. The battery box (100) also includes a lifting point connector (150), and the box cover, the frame (111) and the bottom protective plate (112) are connected by the lifting point connector (150).

8. The battery box (100) according to claim 7, characterized in that, The lifting point connector (150) includes a first lifting point (151) and a second lifting point (152) connected together. The first lifting point (151) is used to connect the box cover and the frame (111). The second lifting point (152) is used to connect the frame (111) and the bottom guard plate (112). The second lifting point (152) includes a second sleeve (1521) and a second locking nut (1522). The frame (111) has a hollow part, and the second sleeve (1521) extends into the hollow part. The second sleeve (1521) has an internal thread structure inside, and the second locking nut (1522) has an external thread structure outside. The external thread structure is locked to the internal thread structure, and the second sleeve (1521) is located on the outside of the bottom guard plate (112).

9. The battery box (100) according to any one of claims 1-4, characterized in that, The battery box (100) also includes a water tap assembly (160), which includes a mounting base (161) and a water tap connector (162); The mounting base (161) is disposed on the liquid cooling plate (120), and the water tap connector (162) is disposed on the mounting base (161) and connected to the liquid cooling channel of the liquid cooling plate (120).

10. The battery box (100) according to claim 9, characterized in that, The size of the mounting base (161) is larger than the size of the faucet connector (162).

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