Battery box and battery pack

Abstract

The utility model provides a battery box and a battery pack. The battery box comprises a box body, an inner box cover and an outer box cover, a module cabin and an electrical cabin which are separated from each other are formed in the box body, the module cabin is used for mounting a battery module, the electrical cabin is used for mounting an electrical part, a liquid inlet, a flow channel and a liquid outlet are formed in the box body, the liquid inlet is communicated with the flow channel, a first opening communicated with the flow channel and a second opening communicated with the liquid outlet are formed in the module cabin, and a first liquid outlet is formed in the electrical cabin; the inner box cover and the box body are connected to cover and seal the module cabin; in this way, by means of the mode, electrical parts can be protected, the accuracy and stability of data collection of the electrical parts are ensured, and the service life of the electrical parts is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a battery box and a battery pack. Background Art

[0002] In the field of submerged battery technology, with the continuous advancement of technology, the demand for high-efficiency and high-density integration of battery systems is growing. However, this technology system faces a significant challenge: electrical components, immersed in coolant for long periods of time, are highly susceptible to corrosion, which can lead to performance degradation, impact the accuracy and stability of data acquisition, shorten lifespan, and even failure. Although some solutions have been proposed in the prior art, such as physically isolating electrical components from the coolant and designing them into separate, sealed compartments to reduce the risk of corrosion, this measure can effectively protect electrical components from coolant in most cases. However, it is worth noting that under extreme operating conditions or during long-term service, if the sealing performance of the sealing ring deteriorates due to factors such as material aging and temperature fluctuations, coolant can still seep into the electrical component compartment, making coolant corrosion of electrical components impossible to completely prevent. Therefore, the development of a more reliable and long-lasting electrical component protection mechanism to completely overcome the problem of electrical component corrosion in submerged battery systems has become a pressing technical issue in this field. Utility Model Content

[0003] Based on this, it is necessary to provide a battery box and battery pack to address the above technical problems, which can protect electrical components, ensure the accuracy and stability of electrical component data collection, and extend their service life.

[0004] According to one aspect of an embodiment of the present utility model, a battery box is provided, comprising: a box body, an inner box cover and an outer box cover, wherein the box body is formed with a module compartment and an electrical compartment separated by a gap, the module compartment is used to install a battery module, and the electrical compartment is used to install electrical components, a liquid inlet, a flow channel and a liquid outlet are provided on the box body, the liquid inlet is connected to the flow channel, the module compartment is provided with a first port connected to the flow channel and a second port connected to the liquid outlet, and a first drain port is provided in the electrical compartment; the inner box cover and the box body are connected to seal the module compartment; the outer box cover and the box body are connected to seal the inner box cover and the module compartment.

[0005] According to one aspect of an embodiment of the present utility model, the box body includes a bottom plate, a side plate, a first end plate, a second end plate and a third end plate, the side plates are spaced apart on opposite sides of the bottom plate, the first end plate, the second end plate and the third end plate are sequentially arranged on the bottom plate, the first end plate, the side plate, the bottom plate and the second end plate together form a module cabin, the second end plate, the side plate, the bottom plate and the third end plate together form an electrical cabin, the bottom plate is provided with a flow channel, the bottom plate in the module cabin is provided with a first port, the first end plate is provided with a second port and a liquid outlet, and the side plate in the electrical cabin is provided with a first drain port.

[0006] According to one aspect of an embodiment of the present utility model, the first end plate includes a first sub-end plate and a second sub-end plate arranged at intervals, the first sub-end plate, the side plate, the bottom plate, and the second sub-end plate together form a sub-cavity, the second sub-end plate, the side plate, the bottom plate, and the second end plate together form a module cabin, the first sub-end plate is provided with a liquid outlet, the second sub-end plate is provided with a second outlet, and the bottom plate of the sub-cavity is provided with a second liquid discharge outlet.

[0007] According to one aspect of the embodiment of the present invention, a drainage channel is formed inside the side plate, and the first drainage port is connected to the drainage channel.

[0008] According to one aspect of an embodiment of the present utility model, the battery box also includes a sealing ring, and the edge of the inner box cover is formed with a folded edge parallel to the bottom plate, and the sealing ring is pressed on the folded edge and the top surface of the side plate, the top surface of the first end plate, and the top surface of the second end plate.

[0009] According to one aspect of the embodiment of the present utility model, a bearing step is provided on the inner wall of the side panel, the top surface of the bearing step is lower than the top surface of the box body, and the sealing ring is provided on the top surface of the bearing step.

[0010] According to one aspect of the embodiment of the present invention, the first liquid drain port is provided at one end of the side plate close to the bottom plate.

[0011] According to one aspect of the embodiment of the present invention, the second liquid drain port is provided at one end of the bottom plate close to the first sub-end plate.

[0012] According to one aspect of an embodiment of the present invention, the battery box includes a plug connector, and a plug hole connecting the electrical compartment and the module compartment is provided on the second end plate. The plug connector is passed through the plug hole, and the plug connector is used to electrically connect the battery module in the module compartment and the electrical components in the electrical compartment.

[0013] According to another aspect of an embodiment of the present invention, a battery pack is also provided, comprising: electrical components, battery modules and a battery box of any of the above items, wherein the electrical components are assembled in the electrical compartment of the battery box, the battery modules are assembled in the battery compartment of the battery box, and the battery modules and the electrical components are electrically connected.

[0014] The beneficial effects of the utility model are:

[0015] The utility model provides a battery box and a battery pack, which comprises a box body, an inner box cover and an outer box cover; the box body is formed with a module compartment and an electrical compartment, the module compartment is used to install the battery module, the electrical compartment is used to install the electrical components, the box body is provided with a liquid inlet, a flow channel and a liquid outlet, the liquid inlet is connected to the flow channel, the module compartment is provided with a first port connected to the flow channel and a second port connected to the liquid outlet, and a first drain port is provided in the electrical compartment; the inner box cover and the box body are connected to seal the module compartment; the outer box cover and the box body are connected to seal the inner box cover and the module compartment, thereby, through In the above manner, the present application adopts a modular design to place the battery module and electrical components in the module compartment and the electrical compartment respectively, thereby providing a safer and more stable operating environment for the electrical components, thereby significantly enhancing the protection capability of the electrical components; at the same time, since the electrical components are properly placed in the electrical compartment and are protected by multiple layers of the inner box cover and the outer box cover, the corrosion of dust, moisture, corrosive gases, etc. in the external environment on the electrical components is reduced, effectively delaying the aging process of the electrical components, thereby extending the service life of the electrical components and reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the utility model, the following is a brief introduction to the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 It is an exploded view of the overall structure of the utility model;

[0018] Figure 2 It is a structural diagram of the practical box;

[0019] Figure 3 This is a schematic diagram of the structure of the practical box at another angle;

[0020] Figure 4 It is a cross-sectional schematic diagram of the practical box along the length direction;

[0021] Figure 5 It is a cross-sectional schematic diagram of the practical box along the width direction.

[0022] 10. Box body; 11. Module compartment; 12. Electrical compartment; 13. Sub-cavity; 100. Liquid inlet; 110. Bottom plate; 111. Flow channel; 112. First port; 113. Second liquid discharge port; 120. Side plate; 121. First liquid discharge port; 122. Liquid discharge channel; 123. Load-bearing step; 130. First end plate; 131. First sub-end plate; 1311. Liquid outlet; 132. Second sub-end plate; 1321. Second port; 140. Second end plate; 150. Third end plate; 200. Sealing ring; 300. Inner box cover; 310. Outer box cover; 400. Battery module; 500. Electrical components; 600. Connecting hole. DETAILED DESCRIPTION

[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be noted that the following embodiments are intended only to illustrate the present invention and do not limit the scope of the present invention. Similarly, the following embodiments are only some of the embodiments of the present invention and not all of them. All other embodiments obtained by persons of ordinary skill in the art without creative effort are also within the scope of protection of the present invention.

[0024] See also Figure 1 and Figure 2 , Figure 1 This is an exploded view of the overall structure of the utility model. Figure 2 It is a structural schematic diagram of the utility box 10 of the present invention. The battery box of the present invention includes a box 10, an inner box cover 300 and an outer box cover 310. The box 10 is formed with a module compartment 11 and an electrical compartment 12 with intervals, wherein the module compartment 11 is used to install the battery module 400, which can be composed of multiple battery cells, and the electrical compartment 12 is used to install electrical components 500 such as the battery management system (BMS), relays, and wiring harnesses. A liquid inlet 100, a flow channel 111 and a liquid outlet 1311 are provided on the box 10. The flow channel 111 is connected to the liquid inlet 100. The liquid inlet 100, the flow channel 111 and the liquid outlet 1311 together constitute a circulation path for the coolant, that is, the coolant flows into the liquid inlet 100, flows into the module compartment 11 through the flow channel 111, and is discharged from the liquid outlet 1311 to realize a cooling cycle. The module compartment 11 has a first port 112, which is directly connected to the flow channel 111, ensuring that the coolant is evenly distributed and flows around the battery module 400 for heat exchange. The module compartment 11 also has a second port 1321, which is connected to the external liquid outlet 1311 of the housing 10, for draining the coolant after heat exchange. Furthermore, a first drain port 121 is provided within the electrical compartment 12 to remove any small amount of liquid that may accumulate within the compartment or to drain liquid during maintenance of the electrical components 500.

[0025] In addition, the inner cover 300 is connected to the box body 10 via bolts, snaps, or other fasteners, tightly sealing the module compartment 11, protecting the internal battery modules 400 from the external environment and helping to maintain the seal within the module compartment 11, ensuring the effectiveness of the coolant circulation system. The outer cover 310 further covers the inner cover 300 and the module compartment 11 and is fixedly connected to the box body 10, forming a double seal protection for the entire battery box. Preferably, the outer cover 310 can also be designed to be easy to open, facilitating routine maintenance and inspection work.

[0026] According to an optional embodiment of the present invention, the box body 10 includes a bottom plate 110, side plates 120, a first end plate 130, a second end plate 140, and a third end plate 150. The side plates 120 are spaced apart on opposite sides of the bottom plate 110. The first end plate 130, the second end plate 140, and the third end plate 150 are sequentially spaced apart on the bottom plate 110 and tightly connected to the bottom plate 110, forming three closed end surfaces of the battery box: the front, middle, and rear. The first end plate 130 is located at the front end of the battery box, the second end plate 140 is located in the middle, and the third end plate 150 is located at the rear end of the battery box. The second end plate 140 separates the battery module 400 from the electrical components 500, thereby reducing the impact of heat generated by thermal runaway of the battery cells on the electrical components 500, thereby improving safety. In addition, this layout not only enhances the overall structural strength of the battery box but also facilitates the arrangement and installation of subsequent modules and components.

[0027] The first end plate 130, side plates 120, bottom plate 110, and second end plate 140 collectively form a housing, or module compartment 11. This compartment primarily houses the battery modules 400, providing a safe operating environment for them. Furthermore, first openings 112 are defined on the bottom plate 110 within the module compartment 11. These openings communicate with flow channels 111 within the bottom plate 110, allowing for the circulation of coolant to effectively control the temperature of the battery modules 400.

[0028] The first end plate 130 is also provided with a second port 1321 and a liquid outlet 1311. The second port 1321 serves as the outlet for the coolant to flow out of the module compartment 11 and is connected to the liquid outlet 1311 to ensure that the coolant can flow smoothly out of the module compartment 11. The liquid outlet 1311 is located on the outside of the first end plate 130 and is used to discharge the coolant that has completed heat exchange out of the battery compartment, forming a complete coolant circulation loop.

[0029] In addition, a first drain port 121 is provided on the side panel 120 in the electrical compartment 12 , which can promptly drain the liquid that has seeped or accumulated in the electrical compartment 12 to prevent the liquid from damaging the electrical components, thereby ensuring the stable operation of the electrical component 500 .

[0030] In actual use, the coolant flows into the battery box from the liquid inlet 100 and flows unidirectionally in the flow channel 111. It enters the module compartment 11 through the first port 112 and then flows out of the module compartment 11 through the second port 1321. The coolant flowing in the module compartment 11 can fully contact the top, bottom, and side walls of each battery cell in the battery assembly, quickly remove heat from all parts of the battery cell, and ensure that all parts of the battery cell are evenly cooled. Therefore, the immersion cooling battery box provided by the utility model has high heat exchange efficiency, can quickly remove heat generated by the battery assembly, and comprehensively and evenly cool the battery assembly, improving the temperature uniformity of the battery assembly.

[0031] Please continue reading Figures 3 to 5 , Figure 3 This is a schematic diagram of the structure of the practical box at another angle; Figure 4 It is a cross-sectional schematic diagram of the practical box along the length direction; Figure 5 It is a cross-sectional schematic diagram of the utility box along the width direction. According to an optional embodiment of the utility model, the first end plate 130 includes a first sub-end plate 131 and a second sub-end plate 132 arranged at intervals. The first sub-end plate 131, the side plate 120, the bottom plate 110, and the second sub-end plate 132 together form a sub-cavity 13, which can be used to store liquid flowing out of the module cabin 11. The second sub-end plate 132, the side plate 120, the bottom plate 110, and the second end plate 140 together form the module cabin 11. Among them, the first sub-end plate 131 is provided with a liquid outlet 1311, which is used to discharge the liquid processed or stored in the sub-cavity 13 to an external system for further processing. Preferably, the liquid outlet 1311 can be equipped with valves, flow meters and other accessories as needed to control the flow and monitor the status. The second sub-end plate 132 is provided with a second port 1321, which is the outlet for the coolant in the module cabin 11. The bottom plate 110 of the secondary chamber 13 is provided with a second drain port 113 for draining the liquid within the secondary chamber 13 when necessary, ensuring safe operation and easy maintenance of the device. Thus, the modular cabin 11 of the present invention achieves flexible division and efficient utilization of the internal space, while also improving the overall performance and maintainability of the device.

[0032] In actual use, the liquid state within the sub-cavity 13 and module compartment 11 can be flexibly adjusted as needed by controlling the liquid inlet and outlet systems. For example, when the liquid within the sub-cavity 13 needs to be drained, the liquid outlet 1311 on the first sub-end plate 131 and the second drain port 113 on the bottom plate 110 can be opened to quickly drain the liquid. Simultaneously, the liquid within the module compartment 11 can be manipulated or adjusted as necessary through the second port 1321 on the second sub-end plate 132.

[0033] According to an optional embodiment of the present invention, a drainage channel 122 is formed within the side panel 120. The first drainage port 121 communicates with the drainage channel 122 via an internal channel or hole. This ensures that when drainage is required, liquid in the electrical compartment 12 can flow smoothly through the first drainage port 121 into the drainage channel 122, then into the auxiliary cavity 13 or the first end plate 130, and finally out of the battery compartment. This embodiment connects the first drainage port 121 with the drainage channel 122 within the side panel 120, the auxiliary cavity 13, or the first end plate 130, providing an efficient and convenient module drainage structure, effectively improving the practicality of the module structure.

[0034] According to an optional embodiment of the present invention, the battery case further includes a sealing ring 200. The edge of the inner cover 300 is machined to form a folded edge parallel to the bottom plate 110. This folded edge not only enhances the structural strength of the inner cover 300 but also provides a reliable support surface for the installation of the sealing ring 200. Preferably, the sealing ring 200 is made of an elastic material, which provides excellent sealing and corrosion resistance.

[0035] During installation, first place the sealing ring 200 at the junction of the folded edge of the inner box cover 300 and the top surface of the side panel 120, the top surface of the first end panel 130, and the top surface of the second end panel 140. Subsequently, using appropriate pressure or fastening devices (such as screws, clips, etc.), the sealing ring 200 is firmly pressed between the folded edge and the above-mentioned top surfaces to ensure that the sealing ring 200 fits tightly with all contact surfaces without any gaps. As a result, the sealing ring 200 can effectively fill and seal the gaps between the inner box cover 300 and the side panel 120, the first end panel 130, and the second end panel 140, preventing the leakage of liquid or gas inside the battery box. It also prevents external impurities such as dust and moisture from entering the battery box, thereby significantly improving the sealing performance of the battery box and providing a safer and more reliable working environment for the components inside the battery box.

[0036] According to an optional embodiment of the present invention, a bearing step 123 is provided on the inner wall of the side panel 120, and the top surface of the bearing step 123 is lower than the top surface of the box body 10 by a certain distance, which not only provides a stable support surface for the installation of the sealing ring 200, but also ensures that the sealing ring 200 will not exceed the overall outline of the box body 10 after installation, thereby maintaining the neat appearance of the box body 10.

[0037] During installation, first place the sealing ring 200 on the top surface of the support step 123, ensuring that it completely covers and fits snugly against the top surface. Then, securely attach the sealing ring 200 to the support step 123 to prevent it from shifting or falling off during operation. Preferably, adhesives, snap fasteners, or the inherent elastic deformation of the sealing ring 200 can be used for securing the seal.

[0038] According to an optional embodiment of the present invention, a first drain port 121 is disposed at one end of the side panel 120 near the bottom panel 110. In practice, when a certain amount of liquid seeps into or accumulates within the electrical compartment 12, the liquid flows along the first drain port 121 to the drainage channel 122 and ultimately drains outside the electrical compartment 12. During this process, the location of the drain port ensures smooth and efficient liquid flow, preventing liquid accumulation and stagnation within the module.

[0039] According to an optional embodiment of the present invention, the second drain port 113 is provided at one end of the bottom plate 110 close to the first sub-end plate 131 .

[0040] According to an optional embodiment of the present invention, the battery box includes a plug connector, which serves as a key connection component. Its shape and size match the plug hole 600 and is stably inserted into the plug hole 600 defined in the second end plate 140. One end of the plug connector is designed with an interface that mates with the output of the battery module 400 in the module compartment 11, ensuring reliable contact and transmission of electrical energy. The other end is designed with an interface that mates with the input of the electrical component 500 in the electrical compartment 12, transmitting electrical energy to the electrical component 500 for subsequent processing or distribution.

[0041] In practice, to connect the module compartment 11 and the electrical compartment 12, one end of the plug connector is first connected to the designated battery module 400 or battery pack in the module compartment 11. The other end of the plug connector is then aligned with the socket 600 on the second end plate 140 and inserted until the plug connector is securely seated. At this point, electrical energy within the module compartment 11 is smoothly transmitted through the plug connector to the electrical components 500 in the electrical compartment 12, establishing an effective electrical connection between the two.

[0042] According to another embodiment of the present invention, a battery pack is provided, comprising an electrical component 500, a battery module 400, and a battery box according to any of the above embodiments. The electrical component 500 is assembled in the electrical compartment 12 of the battery box, the battery module 400 is assembled in the battery compartment of the battery box, and the battery module 400 and the electrical component 500 are electrically connected. Since the advantages of the battery pack have been described in the above embodiments, they will not be repeated here.

[0043] The terms "first", "second" and "third" in the present invention are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, a feature defined as "first", "second" and "third" may explicitly or implicitly include at least one of such features. In the description of the present invention, "multiple" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined. All directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. A process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally also include steps or units that are not listed, or may optionally include other steps or units inherent to these processes, methods, products or devices.

[0044] References to "embodiments" herein mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present invention. The appearance of this phrase in various locations in the specification does not necessarily refer to the same embodiment, nor does it refer to independent or alternative embodiments that are mutually exclusive with other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

Claims

1. A battery box, characterized in that: include: The box body is formed with a module compartment and an electrical compartment separated therefrom, the module compartment is used to install a battery module, the electrical compartment is used to install electrical components, the box body is provided with a liquid inlet, a flow channel, and a liquid outlet, the liquid inlet is connected to the flow channel, the module compartment is provided with a first port connected to the flow channel and a second port connected to the liquid outlet, and the electrical compartment is provided with a first drain port; An inner box cover connected to the box body to seal the module cabin; The outer box cover and the box body connection cover seal the inner box cover and the module cabin.

2. The battery box according to claim 1, wherein: The box body includes a bottom plate, a side plate, a first end plate, a second end plate and a third end plate, the side plates are arranged at intervals on opposite sides of the bottom plate, the first end plate, the second end plate and the third end plate are arranged on the bottom plate in sequence, the first end plate, the side plate, the bottom plate and the second end plate together form the module cabin, the second end plate, the side plate, the bottom plate and the third end plate together form the electrical cabin, the bottom plate is provided with the flow channel, the bottom plate in the module cabin is provided with the first port, the first end plate is provided with the second port and the liquid outlet, and the side plate in the electrical cabin is provided with the first drain port.

3. The battery box according to claim 2, wherein: The first end plate includes a first sub-end plate and a second sub-end plate arranged at intervals. The first sub-end plate, the side plate, the bottom plate, and the second sub-end plate together form a sub-cavity. The second sub-end plate, the side plate, the bottom plate, and the second end plate together form the module cabin. The first sub-end plate is provided with the liquid outlet, the second sub-end plate is provided with the second port, and the bottom plate of the sub-cavity is provided with a second drainage port.

4. The battery box according to claim 2, wherein: A drainage channel is formed inside the side plate, and the first drainage port is communicated with the drainage channel.

5. The battery box according to claim 2, wherein: The battery box also includes a sealing ring, and the edge of the inner box cover is formed with a folded edge parallel to the bottom plate. The sealing ring is pressed on the folded edge and the top surface of the side plate, the top surface of the first end plate, and the top surface of the second end plate.

6. The battery box according to claim 5, characterized in that: A bearing step is provided on the inner wall of the side plate, the top surface of the bearing step is lower than the top surface of the box body, and the sealing ring is provided on the top surface of the bearing step.

7. The battery box according to any one of claims 2 to 6, characterized in that: The first liquid drain port is arranged at one end of the side plate close to the bottom plate.

8. The battery box according to any one of claims 3 to 6, characterized in that: The second liquid drain port is arranged at one end of the bottom plate close to the first sub-end plate.

9. The battery box according to any one of claims 2 to 6, characterized in that: The battery box includes a plug connector, and a plug hole connecting the electrical compartment and the module compartment is provided on the second end plate. The plug connector is passed through the plug hole, and the plug connector is used to electrically connect the battery module in the module compartment and the electrical components in the electrical compartment.

10. A battery pack, characterized in that: The battery pack includes: electrical components, battery modules and a battery box according to any one of claims 1 to 9, the electrical components are assembled in the electrical compartment of the battery box, the battery modules are assembled in the battery compartment of the battery box, and the battery modules and the electrical components are electrically connected.

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