Plug-in hybrid electric vehicle battery device

Abstract

The embodiment of the utility model provides a plug-in hybrid electric vehicle battery device, and relates to the technical field of batteries. The device comprises an integrated casting liquid cooling box body, at least two groups of battery modules and a box body cover plate, wherein the integrated casting liquid cooling box body comprises a box body main body, a liquid cooling runner, a sealing plate and a liquid cooling water gap; the box body cover plate and the box body main body are connected to form a sealed space, the liquid cooling flow channel is arranged in the sealed space, and the sealing plate and the liquid cooling flow channel are connected to form a sealed cavity; the two sides of the liquid cooling flow channel are each provided with a battery module, the battery modules are fixed in the sealed space through the module fixing assemblies, the liquid cooling water openings are connected with the water inlet and outlet in the box body, cooling liquid enters and exits the liquid cooling flow channel through the liquid cooling water openings, and therefore the liquid cooling flow channel gives consideration to the two battery modules. The technical effect of improving the battery space utilization rate is achieved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a plug-in hybrid electric vehicle battery device. Background Art

[0002] New energy vehicles have become mainstream in the automotive industry. Among the three main types of new energy vehicles—pure electric, HEV, and PHEV—PHEV (plug-in hybrid) systems dominate. As a key component of PHEVs, the power battery system significantly impacts vehicle power, pure electric range, and safety. Because PHEV battery systems typically utilize power cells that require both continuous and instantaneous high-power discharge, liquid cooling is a key and challenging aspect of PHEV battery system design.

[0003] In the existing technology, the structural design of plug-in hybrid batteries is that many plug-in hybrid batteries adopt a double-layer module and double-layer liquid cooling plus bracket design. The double-layer module design includes an upper module and a lower module, which are respectively installed on different levels of the module bracket; the double-layer liquid cooling system includes two liquid cooling plates and connecting pipes. Both liquid cooling plates are connected to the connecting pipes to form a complete cooling cycle. The connecting pipes are connected to the vehicle cooling system to ensure that the coolant can continuously circulate and remove the heat generated by the battery.

[0004] Since the battery device needs to be arranged together with other power system components within the limited vehicle chassis space, this compactness requirement may lead to compromises in the design of the battery device, which in turn limits the space. Therefore, the existing technology has the technical problem of low spatial structural utilization of plug-in hybrid vehicle batteries. Summary of the Invention

[0005] The embodiments of the present application provide a plug-in hybrid electric vehicle battery device to solve the technical problem of low battery space structure utilization of plug-in hybrid electric vehicle batteries in the prior art.

[0006] In order to achieve the above-mentioned purpose, the technical solution of the embodiment of the present application is implemented as follows:

[0007] An embodiment of the present application provides a plug-in hybrid electric vehicle battery device, comprising:

[0008] One-piece cast liquid cooling box, at least two battery modules, and box cover;

[0009] The one-piece casting liquid cooling box includes: a box body, a liquid cooling channel, a sealing plate and a liquid cooling water inlet;

[0010] The box cover is connected to the box body to form a sealed space;

[0011] The liquid cooling channel is arranged in a sealed space;

[0012] The sealing plate is connected to the liquid cooling channel to form a sealed cavity; a group of battery modules are respectively arranged on both sides of the liquid cooling channel;

[0013] The battery module is fixed in the sealed space by a module fixing assembly;

[0014] The liquid cooling water port is connected to the water inlet and outlet on the box body, and the coolant flows in and out of the liquid cooling channel through the liquid cooling water port.

[0015] In one possible implementation, a thermal pad is provided between the battery module and the liquid cooling channel.

[0016] In a possible implementation, the liquid cooling channel and the box body are integrally cast.

[0017] In a possible implementation, a fin structure is cast on the outer side of the box body.

[0018] In a possible implementation, the box body is in the shape of an I-shaped box body, and the liquid cooling channel is located in the middle of the I-shaped box body.

[0019] In a possible implementation, the "I"-shaped box body includes two openings, and each opening is connected to the box body through a box cover to form a sealed space.

[0020] In one possible implementation, the module fixing assembly includes: module fixing bolts and module mounting beams;

[0021] The module mounting crossbeam is connected to the box body, and the battery module is fixedly connected to the module mounting crossbeam through the module fixing bolts.

[0022] In a possible implementation, a high-voltage distribution box is further included, and the high-voltage distribution box is arranged in the sealed space.

[0023] In a possible implementation, a battery management system is further included, and the battery management system is arranged in the sealed space.

[0024] In a possible implementation, it further includes high and low pressure plug-ins, which are arranged on the outer side wall of the one-piece cast liquid cooling box.

[0025] The plug-in hybrid electric vehicle battery device provided by the embodiment of the present application includes an integrally cast liquid-cooled box, at least two groups of battery modules, and a box cover. The integrally cast liquid-cooled box includes a box body, a liquid-cooling flow channel, a sealing plate, and a liquid-cooling water inlet. The box cover is connected to the box body to form a sealed space. The liquid-cooling flow channel is arranged in the sealed space to ensure the sealing of the box. The sealing plate is connected to the liquid-cooling flow channel to form a sealed cavity to prevent leakage of coolant in the liquid-cooling channel. A group of battery modules are respectively arranged on both sides of the liquid-cooling flow channel. The battery modules are fixed in the sealed space by a module fixing assembly. The liquid-cooling water inlet is connected to the water inlet and outlet on the box body. The coolant enters and exits the liquid-cooling flow channel through the liquid-cooling water inlet. Therefore, in the integrally cast liquid-cooled box, one liquid-cooling flow channel takes care of two battery modules, which can improve the battery space structure utilization rate of the plug-in hybrid electric vehicle battery and achieve the technical effects of efficient heat dissipation and heat uniformity. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0027] Figure 1 A schematic structural diagram of a plug-in hybrid electric vehicle battery device provided in this application;

[0028] Figure 2 for Figure 1 Schematic diagram of the structure of the integrated casting liquid cooling box;

[0029] Figure 3 for Figure 2 Schematic diagram of the structure of the liquid cooling channel;

[0030] Figure 4 for Figure 2 Schematic diagram of the structure of the middle sealing plate;

[0031] Figure 5 for Figure 2 Schematic diagram of the structure of the middle liquid cooling water outlet;

[0032] Figure 6 for Figure 1 Schematic diagram of the structure of the battery module;

[0033] Figure 7 for Figure 1 Schematic diagram of the structure of the middle box cover;

[0034] Figure 8 for Figure 1 Schematic diagram of the structure of the thermal pad;

[0035] Figure 9 This is a schematic diagram of the "I"-shaped structure of the integrated casting liquid cooling box;

[0036] Figure 10 This is a schematic diagram of the structure of the module fixing bolts of the module fixing assembly;

[0037] Figure 11 for Figure 2 Schematic diagram of the structure of the module installation beam;

[0038] Figure 12 for Figure 1 Schematic diagram of the structure of the medium and high voltage distribution box;

[0039] Figure 13 for Figure 1 Schematic diagram of the battery management system;

[0040] Figure 14 for Figure 1 Schematic diagram of the structure of medium, high and low voltage plug-ins.

[0041] Description of reference numerals:

[0042] 1. One-piece casting liquid cooling box; 1-1. Box body; 1-2. Sealing plate; 1-3. Module mounting beam; 1-4. Liquid cooling water inlet;

[0043] 2. At least two battery modules;

[0044] 3. Box cover;

[0045] 4. High voltage distribution box;

[0046] 5. Thermal pad;

[0047] 6. Battery management system;

[0048] 7. Module fixing bolts;

[0049] 8. High and low voltage plug-ins.

[0050] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0051] To make the purpose, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the embodiments of the present application.

[0052] In the embodiments of the present application, the terms "upper", "lower", "inside", "middle", "outside", "front", "back", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily intended to better describe the present application and its embodiments, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to being constructed and operated in a specific orientation. Moreover, in addition to being used to indicate orientations or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present application can be understood based on the specific circumstances.

[0053] Furthermore, the terms "disposed," "connected," and "fixed" should be interpreted broadly. For example, "connected" can mean a fixed connection, a removable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediary, or an internal connection between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in the embodiments of this disclosure based on the specific circumstances.

[0054] The terms "first," "second," "third," "fourth," and so on (if any) in the description and claims of the embodiments of the present application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application described herein, for example, can be implemented in an order other than those illustrated or described herein.

[0055] In the embodiments of this application, words such as "exemplarily" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplarily" or "for example" in the embodiments of this application should not be interpreted as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplarily" or "for example" is intended to present the relevant concepts in a concrete manner.

[0056] Unless otherwise stated, the term "plurality" means two or more.

[0057] Due to the limited space within vehicles, existing structural designs for plug-in hybrid batteries often employ double-layer modules and double-layer liquid cooling plus brackets in order to arrange as many battery cells as possible within the limited space. The double-layer module design fully utilizes the vertical space within the battery pack by dividing the battery cells into two layers, upper and lower. However, since the battery cells are distributed across two layers, each layer cannot be evenly cooled and heated, raising concerns about the safety and consistency of the battery module. While circulating coolant to the battery module via a liquid cooling plate effectively transfers and dissipates heat, existing double-layer liquid cooling systems mostly utilize split liquid cooling plates, a design approach that incurs high mold costs and complex structural design. Split liquid cooling plates require precise mold manufacturing and installation, increasing manufacturing costs and process complexity. Furthermore, the split design can lead to sealing issues between flow channels, impacting the reliability of the battery system.

[0058] Although the double-layer module design improves the energy density of the battery pack, the overall battery space structure utilization is low due to the complex flow channel design and the space occupied by the liquid cooling system. At the same time, the design of the split liquid cooling plate makes it difficult to ensure flow channel balance. Poor flow channel balance affects low heat dissipation efficiency. Therefore, the structure of the plug-in hybrid battery in the existing technology has technical problems such as low battery space structure utilization, low heat dissipation efficiency, high material cost and poor structural reliability.

[0059] To solve the above problems, an embodiment of the present application provides a plug-in hybrid electric vehicle battery device, comprising an integrally cast liquid-cooled box, at least two groups of battery modules, and a box cover. The integrally cast liquid-cooled box comprises a box body, a liquid-cooling flow channel, a sealing plate, and a liquid-cooling water inlet. The box cover is connected to the box body to form a sealed space, and the liquid-cooling flow channel is arranged in the sealed space to ensure the sealing of the box. The sealing plate is connected to the liquid-cooling flow channel to form a sealed cavity to prevent leakage of coolant in the liquid-cooling channel. A group of battery modules are respectively arranged on both sides of the liquid-cooling flow channel. The battery modules are fixed in the sealed space by a module fixing assembly. The liquid-cooling water inlet is connected to the water inlet and outlet on the box body. The coolant enters and exits the liquid-cooling flow channel through the liquid-cooling water inlet. Therefore, in the integrally cast liquid-cooled box, one liquid-cooling flow channel takes care of two battery modules, which can improve the battery space structure utilization rate of the plug-in hybrid electric vehicle battery and achieve the technical effects of efficient heat dissipation and heat uniformity.

[0060] The following specific embodiments describe in detail the technical solutions of the embodiments of the present application and how the technical solutions of the embodiments of the present application solve the above-mentioned technical problems. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0061] Please refer to Figures 1 to 7This embodiment provides a plug-in hybrid electric vehicle battery device, comprising an integrally cast liquid-cooled housing 1, at least two battery modules 2, and a housing cover 3. The integrally cast liquid-cooled housing 1 comprises a housing body 1-1, a liquid-cooling channel 1-5, a sealing plate 1-2, and a liquid-cooling water inlet 1-4. The housing cover 3 is connected to the housing body 1-1 to form a sealed space. The liquid-cooling channel 1-5 is disposed in the sealed space. The sealing plate 1-2 is connected to the liquid-cooling channel 1-5 to form a sealed cavity. A group of battery modules 2 are disposed on either side of the liquid-cooling channel 1-5. The battery modules 2 are fixed in the sealed space by a module fixing assembly. The liquid-cooling water inlet 1-4 is connected to the water inlet and outlet on the housing body 1-1, and coolant enters and exits the liquid-cooling channel 1-5 through the liquid-cooling water inlet 1-4.

[0062] Specifically, in this embodiment, the integrally cast liquid-cooled housing 1 is formed from a cast aluminum alloy. Aluminum alloy has the advantages of high structural strength, good stability, significant lightweighting, high thermal management efficiency, strong sealing and corrosion resistance, and low processing and manufacturing costs. Aluminum alloy, as a lightweight and high-strength metal material, is used in the integral casting process to form the housing body, which has extremely high structural strength and can withstand significant external forces and pressures, ensuring stable operation of the battery device under complex operating conditions. The integrally cast aluminum alloy housing body can significantly reduce the overall weight of the battery device, helping to improve the vehicle's fuel economy and endurance. Aluminum alloy has excellent thermal conductivity, and the integrally cast liquid-cooling channels 1-5 can more closely fit the battery module, achieving more efficient heat transfer and cooling. The homogeneity of the aluminum alloy material ensures that the coolant in the liquid-cooling channels 1-5 is evenly distributed, reducing the occurrence of local overheating or overcooling and improving the overall thermal management efficiency of the battery system. The integral casting process enables the one-time molding of housing bodies with complex shapes, reducing processing difficulty and cost. At the same time, this application uses an integrated cast liquid cooling box, which reduces the connection points between components, reduces the safety hazards caused by loose or failed connections, improves the overall stability and sealing of the box, and prevents coolant leakage and external environment erosion of the battery system.

[0063] Specifically, in this embodiment, Figure 3 Schematic diagram of the structure of the liquid cooling channel 1-5 in this embodiment. Figure 3 As shown, the liquid cooling channels 1-5 are arranged in a sealed space. The liquid cooling channels ensure that the coolant can flow evenly and efficiently around the battery module by setting uniform flow channels, effectively absorbing and taking away the heat generated by the battery. Figure 4This is a structural diagram of the sealing plate 1-2. A sealed cavity is formed by welding the sealing plate 1-2 and the liquid-cooling channel. The liquid-cooling water port 1-4 is connected to the water inlet and outlet on the box body 1-1, and is connected to the water inlet and outlet reserved by the box casting by welding. This can achieve sealing between the liquid-cooling water port and the box, allowing the coolant to enter and exit the liquid-cooling channel through the liquid-cooling water port 1-4. At the same time, welding can also efficiently conduct heat, which is helpful for heat dissipation and temperature control of the battery. Optionally, the coolant includes but is not limited to ethylene glycol-based coolant and deionized water coolant.

[0064] Specifically, in this embodiment, Figure 6 This is a structural diagram of the battery module 2. The sealing plate 1-2 and the liquid-cooling channel 1-5 are welded, and a group of battery modules are respectively arranged on both sides of the liquid-cooling channel 1-5. The battery module is a key intermediate-level component in the battery system. The battery module is assembled by multiple battery cells (single cells) in series or parallel, aiming to provide higher voltage and capacity to meet the power requirements of specific applications. A battery module is usually composed of multiple battery cells, conductive connectors, a module control unit (BMS slave board), a plastic frame, a cold plate, a cooling pipe, pressure plates at both ends, and fasteners. Each battery module is fixed to the left and right sides of the liquid-cooling channel by a module fixing assembly. By arranging and fixing the two battery modules in a sandwich form, a double-layer structure is avoided, the structural reliability is improved, the material cost is reduced, the structure is compact, and the space utilization rate is high. The heat conduction path provided in this application is shorter than that arranged at the bottom, so more heat can be taken away in the same time, and the temperature drop is more obvious. This structure allows the coolant to more effectively absorb and remove heat generated by the battery module, thereby reducing the operating temperature of the battery module. It also increases the contact area between the battery module and the coolant, improving the efficiency of convective heat transfer. The dual-sided liquid cooling plates help even out the temperature distribution across the battery module. This is crucial for improving battery pack consistency and extending battery life.

[0065] Specifically, in this embodiment, Figure 7 Schematic diagram of the structure of the box cover 3. The box cover 3 is connected to the box body 1-1 by screws to form a sealed space, thereby ensuring the airtightness of the battery device and facilitating subsequent fault removal.

[0066] By adopting the above technical solution, a sealed cavity is formed by connecting the sealing plate 1-2 and the liquid-cooling channel 1-5, and the liquid-cooling water port 1-4 is connected to the water inlet and outlet on the box body 1-1, so as to ensure that the coolant enters and exits the liquid-cooling channel 1-5 through the liquid-cooling water port 1-4, thereby forming an integrated cast liquid-cooling box 1, achieving the overall stability and structural reliability of the box, and fixing the battery modules on both sides of the sealed cavity respectively, so that one liquid-cooling channel can realize the heat dissipation of two battery modules, with high space utilization, and effectively reducing the operating temperature of the battery module, and the box cover 3 is connected to the box body 1-1 by screws, thereby forming a battery device with good airtightness.

[0067] In an optional embodiment, a thermal pad 5 is provided between the battery module 2 and the liquid cooling channels 1 - 5 .

[0068] For details, please refer to Figure 1 and Figure 8 In this embodiment, the thermal pad is placed directly between the battery module 2 and the liquid cooling channel in the integrated casting liquid cooling box, and is connected by adhesive to play a role in heat uniformity and heat conduction. The material of the thermal pad includes but is not limited to thermal conductive silicone sheet, phase change thermal conductive sheet and thermal conductive silicone gel.

[0069] In an optional embodiment, the liquid cooling channel 1-5 is integrally cast with the box body 1-1.

[0070] For details, please refer to Figure 3 In this embodiment, the liquid cooling channel 1-5 is integrally cast with the box body 1-1, and has the characteristics of light weight, high precision, one-time molding and high strength.

[0071] In an optional embodiment, a fin structure is cast on the outside of the box body 1-1.

[0072] Specifically, in this embodiment, the fin structure and the housing body 1-1 are integrally cast, reducing the number of components in the overall battery system, optimizing battery design and achieving a lightweight design. This also simplifies the installation process and reduces production costs. Fins are typically made of thermally conductive material and their basic structure consists of fin blocks and fin rings. The fin blocks are bonded to the fins of the fin rings with thermally conductive adhesive, forming an effective heat dissipation system. This design helps efficiently direct heat from the chip holder to the fins, where it is then dissipated through convection between the fins and the air. Casting the fin structure on the exterior of the housing body 1-1 increases the heat exchange area, improving the heat exchange efficiency between the battery pack and the external environment. During battery charging and discharging, a large amount of heat is generated. The fin structure effectively dissipates this heat, preventing the battery from overheating, thereby ensuring battery safety and service life. Furthermore, through a rational fin layout and design, heat can be evenly distributed within the battery pack, reducing the occurrence of localized overheating and improving the overall performance of the battery pack.

[0073] In an optional embodiment, the box body 1-1 is in the shape of an "I" character, and the liquid cooling channel 1-5 is located in the middle of the "I"-shaped box body 1-1.

[0074] For details, please refer to Figure 1 、 Figure 3 and Figure 9 In this embodiment, the "I"-shaped structure has good bending resistance and strong structural stability.

[0075] In an optional embodiment, the “I”-shaped box body 1 - 1 includes two openings, and each opening is connected to the box body 1 - 1 through a box cover 3 to form a sealed space.

[0076] For details, please refer to Figure 1 and Figure 9 In this embodiment, the liquid-cooling channel 1-5 is located in the middle part of the box body, and the two battery modules 2 and the liquid-cooling channel 1-5 are installed in a sandwich form. One liquid-cooling channel 1-5 can take care of two battery modules at the same time, which greatly optimizes the types of structural parts, improves structural reliability, and reduces costs.

[0077] In an optional embodiment, the module fixing assembly includes: module fixing bolts 7 and module mounting beams 1-3;

[0078] The module mounting crossbeam 7 is connected to the box body 1 - 1 , and the battery module 2 is fixedly connected to the module mounting crossbeam 1 - 3 via the module fixing bolts 7 .

[0079] For details, please refer to Figure 1 、 Figure 2 、 Figure 10 and Figure 11 In this embodiment, the module mounting crossbeam 7 serves as a connecting bridge, and its design fully considers load-bearing, stability and compatibility. Consistent with the structure of the cast liquid-cooled box 1, it is made of high-strength aluminum alloy material to ensure that it is not easily deformed when carrying the battery module 2. At the same time, its shape and size are precisely calculated to adapt to the interface of the box body 1-1 to achieve a seamless or tight-fitting connection. The module mounting crossbeam 7 is connected to the sealing plate 1-2 in the box body 1-1 by welding, and is also welded to the other side of the liquid cooling channel in the box body 1-1. The module fixing bolts 7 are used as the connection medium to connect and fix each battery module to the module mounting crossbeam.

[0080] In an optional embodiment, a high-voltage distribution box 4 is further included, and the high-voltage distribution box 4 is arranged in the sealed space.

[0081] For details, please refer to Figure 1 and Figure 12 In this embodiment, the high-voltage distribution box 4 and the box body 1-1 are fixed by screws. The high-voltage distribution box 4 distributes the high-voltage electric energy of the power battery to various high-voltage electrical equipment. At the same time, the high-voltage distribution box 4 controls the switch state of the circuit through built-in high-voltage switches, isolating switches and other equipment to achieve effective management of electric energy; the high-voltage distribution box 4 measures and monitors key parameters such as current, voltage, and power through monitoring instruments, sensors and other equipment, which helps to timely detect faults in the power system and ensure the stable operation and safety of the power system.

[0082] In an optional embodiment, a battery management system 6 is further included, and the battery management system 6 is arranged in the sealed space.

[0083] For details, please refer to Figure 1 and Figure 13In this embodiment, the battery management system 6 and the box body 1-1 are connected by screws. The functions of the battery management system 6 include but are not limited to real-time temperature monitoring, cooling and heating control, fault diagnosis and early warning, and remote data analysis. Among them, the temperature of the battery is monitored in real time by temperature sensors arranged inside the battery pack. These sensors are usually placed in key positions of the battery, such as the surface of the battery cell, between the battery modules, and in the overall structure of the battery pack to obtain temperature data of the battery at different positions and states. The collected temperature data will be processed and analyzed by the BMS to determine the impact of the current temperature on the battery performance and predict future temperature change trends. Based on the analysis of the temperature data, the battery management system 6 can control the cooling and heating of the battery. The battery management system 6 regulates the battery temperature through a heating system. In addition to controlling the overall temperature, the battery management system 6 optimizes the thermal distribution within the battery pack by adjusting the coolant circulation path to ensure temperature uniformity. When the battery temperature exceeds a preset safety threshold, the battery management system 6 triggers an overheat protection mechanism, reducing charging power, increasing cooling power, or disconnecting the circuit to prevent battery failure or safety incidents due to overheating. The battery management system 6 can identify and respond to abnormal battery conditions such as overheating, overvoltage, and undervoltage, and issue early warning signals so that users or maintenance personnel can take timely action. The battery management system 6 can also implement intelligent temperature adaptation. During the charging and discharging process, the BMS adjusts the charging and discharging strategy based on the battery temperature. For example, in high-temperature environments, the charging power can be reduced to slow the battery temperature rise, while in low-temperature environments, a preheating step can be added before charging to improve charging efficiency. Remote monitoring and data analysis are also available, allowing users or maintenance personnel to obtain real-time battery status information, including temperature data, via the network. By analyzing remote monitoring data, battery temperature control issues can be promptly identified and resolved, improving the reliability and safety of the battery system.

[0084] In an optional embodiment, a high- and low-pressure plug-in 8 is further included, and the high- and low-pressure plug-in 8 is arranged on the outer side wall of the one-piece cast liquid cooling box 1.

[0085] For details, please refer to Figure 1 and Figure 14 In this embodiment, the high and low voltage plug-in 8 and the outer side wall of the one-piece cast liquid cooling box 1 are connected by screws. It has multiple functions in electronic equipment, such as circuit connection and signal transmission, power transmission and energy conversion, safety and reliability, flexibility and maintainability, and is an indispensable and important component of electronic equipment.

[0086] Those skilled in the art will readily conceive of other embodiments of the present invention after considering the specification and practicing the utility model disclosed herein. The present invention is intended to encompass any variations, uses, or adaptations of the present invention, which follow the general principles of the present invention and include common knowledge or customary techniques in the art not disclosed in the present invention. The specification and examples are to be considered merely as exemplary, and the true scope and spirit of the present invention are indicated by the following claims.

[0087] It should be understood that the embodiments of the present application are not limited to the precise structures described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the embodiments of the present application is limited only by the appended claims.

Claims

1. A plug-in hybrid electric vehicle battery device, characterized in that: include: An integrated cast liquid cooling box (1), at least two battery modules (2), and a box cover (3); the integrated cast liquid cooling box (1) comprises a box body (1-1), a liquid cooling channel (1-5), a sealing plate (1-2), and a liquid cooling water inlet (1-4); The box cover (3) is connected to the box body (1-1) to form a sealed space; The liquid cooling channel (1-5) is arranged in the sealed space; The sealing plate (1-2) is connected to the liquid cooling channel (1-5) to form a sealed cavity; a group of battery modules (2) is respectively provided on both sides of the liquid cooling channel (1-5); The battery module (2) is fixed in the sealed space via a module fixing assembly; The liquid cooling water port (1-4) is connected to the water inlet and outlet on the box body (1-1), and the cooling liquid enters and exits the liquid cooling channel (1-5) through the liquid cooling water port (1-4).

2. The device according to claim 1, characterized in that A heat-conducting pad (5) is provided between the battery module (2) and the liquid-cooling channel (1-5).

3. The device according to claim 1, characterized in that The liquid cooling channel (1-5) and the box body (1-1) are integrally cast.

4. The device according to claim 1, characterized in that A fin structure is cast on the outer side of the box body.

5. The device according to claim 1, characterized in that The box body (1-1) is in an "I" shape, and the liquid cooling channel (1-5) is located in the middle of the "I"-shaped box body (1-1).

6. The device according to claim 1, characterized in that The "I"-shaped box body comprises two openings, and each opening is connected to the box body (1-1) via a box cover (3) to form a sealed space.

7. The device according to claim 1, characterized in that The module fixing assembly comprises: a module fixing bolt (7) and a module mounting beam (1-3); The module mounting crossbeam (1-3) is connected to the box body (1-1), and the battery module (2) is fixedly connected to the module mounting crossbeam (1-3) via a module fixing bolt (7).

8. The device according to claim 1, characterized in that It also includes a high-voltage distribution box (4), which is arranged in the sealed space.

9. The device according to claim 1, characterized in that It also includes a battery management system (6), which is arranged in the sealed space.

10. The device according to claim 1, characterized in that It also includes high and low pressure plug-ins (8), which are arranged on the outer side wall of the integrated casting liquid cooling box (1).

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