Battery device, energy storage device, energy storage system, and charging network

Abstract

This invention provides a battery device, energy storage device, energy storage system, and charging network, relating to the field of battery technology. The battery device includes a cold plate assembly, which comprises: a cold plate having a heat exchange channel and at least two independent fire-fighting channels within it, and a fire-fighting medium outlet communicating with the fire-fighting channels; at least one connecting member forming at least one communicating channel with the outer surface of the cold plate, the communicating channel connecting at least two fire-fighting channels; a fire-fighting inlet provided on the cold plate or at least the connecting member, the fire-fighting inlet communicating with a portion of the fire-fighting channels or with the communicating channel; and a heat exchange medium inlet and outlet provided on the cold plate, the heat exchange medium inlet communicating with the heat exchange channel inlet and the heat exchange medium outlet communicating with the heat exchange channel outlet. This application integrates liquid cooling and fire-fighting functions into the same cold plate, eliminating the need for separate liquid cooling plates and fire-fighting pipelines, reducing the number of parts and assembly steps in the battery device, and lowering the manufacturing cost and weight of the battery device.

Description

Technical Field

[0001] This invention relates to the field of battery technology, and more specifically, to a battery device, an energy storage device, an energy storage system, and a charging network. Background Technology

[0002] With the rapid development of new energy technologies, battery devices (such as electric vehicle power battery packs and energy storage battery packs) are constantly improving in terms of energy density and charging and discharging efficiency. However, during their operation, they are prone to generating a large amount of heat due to internal electrochemical reactions, external short circuits, or overcharging. If the heat cannot be dissipated in time, it may cause thermal runaway or even lead to the risk of fire.

[0003] It is evident that in the development of battery devices, range performance and fire safety reliability are two key performance indicators. Therefore, improving the fire safety reliability of battery devices is a technical issue that requires continuous improvement. Summary of the Invention

[0004] The present invention aims to at least improve the fire safety reliability of battery devices in the prior art or related technologies.

[0005] Therefore, the first aspect of this application proposes a battery device.

[0006] The second aspect of this application proposes an energy storage device.

[0007] The third aspect of this application proposes an energy storage system.

[0008] The fourth aspect of this application proposes a charging network.

[0009] A first aspect of the present invention provides a battery device, including a cold plate assembly, the cold plate assembly comprising: a cold plate having a heat exchange channel and at least two independently arranged fire-fighting channels within it, and at least one fire-fighting medium outlet communicating with the fire-fighting channels; at least one connecting member installed on the cold plate, forming at least one communicating channel with the outer surface of the cold plate, the communicating channel communicating with at least two fire-fighting channels; a fire-fighting inlet provided on the cold plate or at least one connecting member, the fire-fighting inlet communicating with a portion of the fire-fighting channels or communicating with the communicating channel; and a heat exchange medium inlet and a heat exchange medium outlet provided on the cold plate, the heat exchange medium inlet communicating with the inlet of the heat exchange channel and the heat exchange medium outlet communicating with the outlet of the heat exchange channel.

[0010] The battery device according to the present invention includes a cold plate assembly. The cold plate assembly includes a cold plate and at least one connecting member. The cold plate has heat exchange channels machined internally, and at least two independently arranged fire-fighting channels. The heat exchange channels contain heat exchange media, which absorb heat generated during battery operation through circulation to achieve liquid cooling. Each fire-fighting channel is independently arranged and not interconnected. A fire-fighting medium outlet is provided on the cold plate corresponding to each fire-fighting channel, allowing the fire-fighting medium to be directly sprayed into the fire zone inside the battery device. At least one connecting member is installed on the cold plate, and the connecting member fits tightly with the outer surface of the cold plate, together forming at least one closed connecting channel. The function of the connecting channel is to connect at least two fire-fighting channels, allowing the fire-fighting medium to flow between the different fire-fighting channels. A fire-fighting inlet is provided on the cold plate or at least one connecting member, and the fire-fighting inlet is directly connected to the connecting channel or to a portion of the fire-fighting channels for introducing external fire-fighting medium. Both the heat exchange medium inlet and outlet are located on the cold plate. The heat exchange medium inlet is connected to the inlet end of the heat exchange channel, and the heat exchange medium outlet is connected to the outlet end of the heat exchange channel. The heat exchange medium can enter the channel from the inlet to complete the circulation and heat absorption, and then be discharged from the outlet of the heat exchange channel.

[0011] In this embodiment, liquid cooling and fire suppression functions are integrated into the same cold plate, eliminating the need for separate liquid cooling plates and fire suppression piping. This reduces the number of parts and assembly steps in the battery unit, simplifying its structure and lowering its manufacturing cost and weight. At least two independently designed fire suppression channels prevent the risk of fire suppression failure due to a single channel malfunction, improving the fire suppression reliability of the battery unit. The connecting channel formed by the connecting component and the cold plate replaces additional fire suppression piping, simplifying the structure and reducing the possibility of media leakage, further enhancing the fire suppression reliability of the battery unit.

[0012] In any of the above embodiments, optionally, the heat exchange medium inlet, the heat exchange medium outlet, and the fire-fighting inlet are located on the same side of the cold plate assembly, and the fire-fighting inlet is located between the heat exchange medium inlet and the heat exchange medium outlet.

[0013] In these embodiments, the heat exchange medium inlet, heat exchange medium outlet, and fire inlet are arranged on the same side, avoiding the pipe routing problems caused by dispersing these components on multiple sides of the cold plate. The fire inlet is located in the middle, allowing the connecting pipes for the heat exchange medium and fire-fighting medium to exit from the same side, reducing overlap between different pipes. For example, when the battery device is installed in an energy storage container, the side of the cold plate with the heat exchange medium inlet, heat exchange medium outlet, and fire inlet can face the outside of the container. External heat exchange medium pipes and fire-fighting water pipes can be directly connected from the same side, eliminating the need to reserve space inside the container or on the other side of the cold plate, thus simplifying the installation process.

[0014] In any of the above embodiments, optionally, one or more battery modules are provided in the battery device, and each battery module is provided with at least one fire-fighting flow channel.

[0015] In these embodiments, by configuring a separate fire-fighting channel for each battery module, the delivery path of the fire-fighting medium is made more direct. That is, after the fire-fighting medium enters the fire-fighting channel from its inlet, it does not need to be diverted to other modules and can be directly sprayed onto the cell area of ​​the target module, shortening the medium diffusion time. Simultaneously, configuring a separate fire-fighting channel for each battery module ensures that the fire-fighting channel covers all battery modules, thus ensuring the uniform distribution of the fire-fighting channel within the battery device and avoiding blind spots caused by missing channels. When any battery module catches fire, it can quickly receive fire-fighting medium coverage, improving overall fire extinguishing efficiency. The uniformly distributed fire-fighting channel reduces the impact of manufacturing errors on the protective effect, making the fire-fighting performance of different batches of battery devices more stable.

[0016] In any of the above embodiments, optionally, the heat exchange channel includes a plurality of sub-channels arranged sequentially at intervals, the ends of the plurality of sub-channels being connected sequentially, and any fire-fighting channel being arranged between two adjacent sub-channels, the extension direction of the sub-channels being consistent with the extension direction of the fire-fighting channel.

[0017] In these embodiments, multiple fire-fighting channels are interspersed among multiple sub-channels, which maximizes the utilization of the internal space of the cold plate and makes the structure more compact. At the same time, multiple fire-fighting channels can be distributed throughout the cold plate, thereby increasing the number of fire-fighting channels on the cold plate and improving the uniformity of the distribution of fire-fighting channels throughout the cold plate. This allows fire protection to basically cover the entire area of ​​the cold plate, eliminates protective gaps, and improves the consistency of overall fire suppression.

[0018] In any of the above embodiments, optionally, at least two sub-channels are provided between two adjacent fire-fighting flow channels.

[0019] In these embodiments, at least two sub-channels are provided between two adjacent fire-fighting channels, so that the total number of sub-channels is significantly greater than that of the fire-fighting channels. The total area of ​​the heat exchange channels (composed of sub-channels) is higher, and more internal space of the cold plate is used for the flow of heat exchange medium, which enhances the overall heat exchange capacity of the cold plate and ensures the cooling or heating effect of the cold plate on the battery.

[0020] Optionally, the number of sub-channels between two adjacent fire-fighting channels is the same.

[0021] In these embodiments, the number of sub-channels between two adjacent fire-fighting flow channels is the same, meaning that the heat exchange structure of each fire-fighting flow channel interval in the cold plate is completely symmetrical. Each interval contains the same number of sub-channels, and these sub-channels are connected end-to-end to form a complete heat exchange channel. This design ensures that the flow path length and flow cross-sectional area of ​​the heat exchange medium in each interval are completely consistent, resulting in a more balanced distribution of medium velocity and flow rate. This avoids uneven local heat exchange efficiency caused by differences in the number of flow channels, and improves the stability of the overall cooling effect of the battery device.

[0022] Meanwhile, the consistent number of sub-channels enhances the symmetry of the cold plate structure, and the mold is subjected to uniform force during stamping, reducing the risk of channel deviation or deformation caused by processing errors. The heat exchange and fire protection performance of different batches of cold plates are more similar, improving production consistency.

[0023] In any of the above embodiments, optionally, the two outermost sub-channels among the plurality of sub-channels are both arranged adjacent to one of the fire-fighting channels.

[0024] In these embodiments, the heat exchange channel is composed of multiple sub-channels arranged sequentially at intervals, and the multiple sub-channels are connected end to end to form a complete heat exchange path. Among the multiple sub-channels, the two outermost sub-channels (the leftmost sub-channel and the rightmost sub-channel along the arrangement direction of the sub-channels) are each adjacent to a fire-fighting channel. Specifically, multiple sub-channels are distributed in parallel along the length of the cold plate, and the spacing between adjacent sub-channels is uniform; the right side of the leftmost sub-channel is adjacent to a fire-fighting channel, and the left side of the rightmost sub-channel is adjacent to another fire-fighting channel, forming a symmetrical layout of "sub-channel-fire-fighting channel-sub-channel-fire-fighting channel-sub-channel-fire-fighting channel".

[0025] In this embodiment, since the two outermost sub-channels are adjacent to the fire-fighting channels, the fire-fighting channels are not limited to the middle area, but are distributed from the edge to the whole length, basically covering the entire area of ​​the cold plate. This increases the number of fire-fighting channels and ensures the uniformity of the distribution of fire-fighting channels on the cold plate.

[0026] In any of the above embodiments, optionally, the fire inlet is disposed on the cold plate and communicates with part of the fire flow channel. The cold plate assembly includes at least two connecting ports disposed on the cold plate for connecting at least two fire flow channels and connecting passages.

[0027] In these embodiments, the fire inlet is located on the cold plate and directly connects to a portion of the fire flow channel (the first fire flow channel). The fire flow channel that is not directly connected (the second fire flow channel) is connected to the first fire flow channel through a connecting member. By placing the fire inlet on the cold plate, the connecting member does not require an additional docking structure for the fire medium inlet; it only needs to retain the connection function with the fire flow channel, thus simplifying the overall structure of the connecting member. Simultaneously, the cold plate already has a heat exchange medium inlet and outlet. When adding an additional fire inlet, the existing layout of the cold plate and stamping or milling processes can be used for simultaneous processing, without significantly adjusting the structure of the cold plate or adding special materials. Therefore, it does not significantly increase manufacturing costs, nor does it complicate the overall structure of the cold plate. This design achieves both the fire inlet and connection function by reusing the cold plate, simplifying components while maintaining structural compactness and economy.

[0028] In any of the above embodiments, optionally, the cold plate includes: a first plate, on which a first groove and a plurality of independently arranged second grooves are provided; a second plate, mounted on the first plate, wherein the heat exchange channel is surrounded by the second plate and the first groove, and the plurality of fire-fighting channels are surrounded by the second plate and the plurality of second grooves; the second plate is a flat plate.

[0029] In these embodiments, the cold plate comprises two parts: a first plate and a second plate. The surface of the first plate is machined with a first groove and multiple independent second grooves. The second plate is a flat plate without complex structure and is tightly fitted onto the first plate by welding or brazing. The heat exchange channel is a closed channel formed by the surface of the second plate near the first plate, the bottom surface of the first groove, and the sidewalls, used to accommodate the circulating flow of heat exchange medium (such as coolant) and absorb the heat generated by battery operation. Multiple fire-fighting channels are independent closed channels formed by the surface of the second plate near the first plate, the bottom surface of the second groove, and the sidewalls, respectively. Each fire-fighting channel corresponds to a battery module area within the battery device, and its surface has fire-fighting medium outlet holes to guide the fire-fighting medium (such as water or aerosol) to be sprayed towards the corresponding module.

[0030] In this embodiment, the flat plate characteristic of the second plate means that when designing the second plate, there is no need to customize the structure of the second plate to match the complex flow channels, which reduces the mold cost and stamping difficulty. The heat exchange flow channel and the fire protection flow channel are both surrounded by the groove on the first plate and the second plate, sharing the material and processing steps of the first plate, reducing material consumption. The independent second groove ensures that each fire protection flow channel does not interfere with each other, avoiding the impact of a single flow channel failure on the protection of other modules.

[0031] In any of the above embodiments, optionally, the first trench includes a plurality of sub-grooves arranged sequentially at intervals, the beginning and end of the plurality of sub-grooves being connected sequentially, and the second trench is disposed between two adjacent sub-grooves, the extension direction of the sub-grooves being consistent with the extension direction of the second trench.

[0032] In these embodiments, multiple second grooves are interspersed among multiple sub-grooves, which maximizes the utilization of the internal space of the cold plate and makes the structure more compact. At the same time, multiple second grooves can be distributed throughout the cold plate, thereby increasing the number of second grooves on the cold plate and improving the uniformity of the distribution of second grooves throughout the cold plate. This allows fire protection to basically cover the entire area of ​​the cold plate, eliminates protective gaps, and improves the consistency of overall fire suppression.

[0033] The first plate is the base plate, and the second plate is installed on top of the base plate. The first plate can be the base plate, also called the flow channel plate, and the second plate installed on top of the base plate is the top plate, also called the cover plate. This design allows the fire-fighting medium in the fire-fighting flow channel to flow directly from the bottom of the cold plate after the cold plate is installed, so as to extinguish the fire on objects below the battery unit (such as the battery unit on the next floor).

[0034] In any of the above embodiments, optionally, the connecting member is installed on the surface of the second plate away from the first plate, the fire-fighting medium outlet is provided on the bottom wall of the second groove, and when the fire-fighting flow channel is provided with multiple fire-fighting medium outlets, the multiple fire-fighting medium outlets are spaced apart along the extension direction of the fire-fighting flow channel.

[0035] In these embodiments, the connecting member is installed on the surface of the second plate away from the first plate, and the fire-fighting medium outlet is opened at the bottom wall of the second groove on the first plate. When a single fire-fighting channel corresponds to multiple fire-fighting medium outlets, these fire-fighting medium outlets are arranged at intervals along the extension direction of the fire-fighting channel.

[0036] In this design, the fire-fighting medium outlet is located on the bottom wall of the second trench, which corresponds to the position layout of the next layer of battery devices. The fire-fighting medium outlet on the bottom wall can directly spray the fire-fighting medium onto the next layer of battery devices, avoiding coverage offset caused by the fire-fighting medium outlet being on the side wall or in other positions, and ensuring that the medium can directly act on the next layer of battery devices.

[0037] In any of the above embodiments, optionally, the fire-fighting flow channel is provided with a plurality of fire-fighting medium outlets, the plurality of fire-fighting medium outlets are spaced apart along the extension direction of the fire-fighting flow channel, and the battery device further includes a plurality of battery cells, at least a portion of the plurality of battery cells are arranged sequentially along the extension direction of the fire-fighting flow channel.

[0038] In these embodiments, each fire-fighting channel can be equipped with multiple fire-fighting medium outlets to improve the output efficiency of the fire-fighting medium and enhance the fire-fighting effect. The battery device consists of multiple battery cells arranged in one or more rows along the extension direction of the fire-fighting channel. This structure allows rows of battery cells to extinguish fires through the same fire-fighting channel, resulting in a wider coverage area for each fire-fighting channel.

[0039] For example, along the extension direction of the fire-fighting channel, the number of battery cells corresponds to the number of fire-fighting medium outlets. This structure ensures that each battery cell has a corresponding fire-fighting medium outlet, guaranteeing the fire-fighting effect for each battery cell.

[0040] In any of the above embodiments, optionally, the surface of the connecting member near the cold plate is provided with a recessed portion that is recessed in a direction away from the cold plate, and the connecting channel is formed by the recessed portion and the outer surface of the cold plate.

[0041] In these embodiments, the surface of the connecting member near the cold plate is machined with a recessed portion that is recessed in the direction away from the cold plate, and the connecting channel is formed by the recessed portion and the outer surface of the cold plate.

[0042] The connecting part can be a metal stamping part (such as aluminum alloy), and its shape matches the outer surface of the cold plate. The surface near the cold plate is not flat, but has a recessed structure.

[0043] By setting a recess on the connecting piece, a connecting channel can be formed by the connecting piece and the cold plate, which simplifies the structure of the entire cold plate.

[0044] In any of the above embodiments, optionally, the cold plate and the connecting member are connected by a threaded connector, the cold plate is provided with a nut for locking the threaded connector, the cold plate is provided with a first mounting hole for the threaded connector to pass through, and the connecting member is provided with a second mounting hole for the threaded connector to pass through.

[0045] In these embodiments, the cold plate and the connecting member are connected by a threaded connector. A nut is pre-installed inside the cold plate, which is fixed in place by aligning the first mounting hole of the cold plate with the second mounting hole of the connecting member. This design allows for quick assembly and disassembly without welding or gluing, simplifying the assembly and maintenance process; the pre-installed nut eliminates the need for additional parts, reducing assembly steps; aligned mounting holes ensure precise connection positions, reducing the risk of misalignment; and the threaded fit combined with the sealing element reduces the probability of media leakage and improves structural stability.

[0046] The nut is a press-fit nut. During installation, matching holes can be pre-punched on the first plate, and then the nut can be aligned with the holes and pressure applied with a press-fit machine until the nut is tightly joined to the plate.

[0047] In any of the above embodiments, optionally, the cold plate includes a first plate and a second plate connected to each other, a heat exchange channel and at least two fire-fighting channels are surrounded by the first plate and the second plate, a connecting member is installed on the surface of the second plate away from the first plate, a nut is installed on the first plate and is disposed away from the area of ​​the first plate used to surround the heat exchange channel and the fire-fighting channel, and gaps are provided on both sides of the nut with the heat exchange channel and / or the fire-fighting channel, and a first mounting hole is provided on the second plate.

[0048] In these embodiments, the cold plate comprises a first plate and a second plate connected to each other, wherein the first plate is a flow channel plate. A heat exchange flow channel and at least two fire-fighting flow channels are enclosed by the first plate and the second plate. A connecting member is installed on the surface of the second plate opposite to the first plate (i.e., the upper surface of the second plate) for connecting different fire-fighting flow channels; a nut is directly installed inside the first plate (flow channel plate); a first mounting hole is formed on the second plate, corresponding to a second mounting hole on the connecting member, for a threaded connector (such as a bolt) to pass through, cooperating with the nut to lock the connecting member onto the lower surface of the second plate.

[0049] In this embodiment, the first plate serves as a flow channel plate, integrating flow channel forming and nut fixing functions, reducing the use of independent fasteners; the second plate serves only as a cover plate, requiring no complex processing and reducing mold costs. Both the heat exchange flow channel and the fire-fighting flow channel are formed by the two plates fitting together, sharing materials and processing steps, resulting in a compact structure. The connecting parts are fixed with bolts and press-fit nuts, ensuring reliable sealing and allowing for quick assembly and disassembly, facilitating maintenance of the fire-fighting flow channel. Nuts are pre-placed on the first plate, avoiding additional drilling or welding, improving the assembly efficiency of the cold plate.

[0050] In any of the above embodiments, optionally, there are four fire-fighting channels. The two middle fire-fighting channels are connected to the fire inlet, and the two edge fire-fighting channels are connected to their adjacent fire-fighting channels through a connecting member.

[0051] Each battery unit contains two battery modules. Each battery module corresponds to two fire-fighting flow channels and four sub-flow channels.

[0052] Optionally, the first plate is a stamped aluminum plate. The first plate and the second plate are connected by brazing.

[0053] Alternatively, the battery device may be a battery pack or a battery box.

[0054] A second aspect of this application provides an energy storage device comprising at least one battery device as described in any embodiment of the first aspect, the battery device being used to store or provide electrical energy.

[0055] The energy storage device proposed in this application includes one or more battery devices as described in any of the embodiments of the first aspect, which are used to store or provide electrical energy. Therefore, this energy storage device has all the beneficial effects of the battery devices in any of the embodiments of the first aspect, which will not be elaborated here.

[0056] Optionally, there are multiple battery devices arranged sequentially along the height of the energy storage device. The fire-fighting medium discharged from the fire-fighting medium outlet of the upper battery device can act on the lower battery device, thus enabling the fire-fighting medium outlet of the upper battery device to carry out fire-fighting operations on the lower battery device.

[0057] Multiple battery units are arranged sequentially at intervals along the height of the energy storage device, which allows a certain vertical distance to be maintained between adjacent battery units.

[0058] Optionally, the battery device has a first pressure relief mechanism located on the top surface of the battery device.

[0059] In these embodiments, the battery device includes a first pressure relief mechanism, which serves as a safety component for releasing abnormally high-pressure gas inside. Specifically, it may consist of components such as a rupture disc, a notched cover, or an openable valve body. When abnormal gas generation and pressure rise occur within the battery cells, and the pressure reaches the threshold of the first pressure relief mechanism, the mechanism activates, releasing the high-pressure gas in a directional manner to prevent the casing from bursting. The first pressure relief mechanism is positioned on the top surface, with the pressure relief port naturally facing upwards. This allows the first pressure relief mechanism to correspond with the fire extinguishing medium outlet of the upper battery device. The fire extinguishing medium sprayed from the outlet can directly cover the pressure relief area, cooling the battery device and its surroundings, reducing the likelihood of valve opening and pressure release, and preventing impact on other battery devices.

[0060] Optionally, the battery device includes a battery cell, the battery cell having a second pressure relief mechanism located on the top surface of the battery cell.

[0061] In these embodiments, the battery cell includes a second pressure relief mechanism. This second pressure relief mechanism serves as a safety component for releasing abnormally high-pressure gas inside the battery cell. Specifically, it may be composed of components such as a miniature rupture disc, a top-scored cover, or a miniature openable valve. When abnormal gas generation and pressure rise inside the battery cell, and the pressure reaches the threshold of the second pressure relief mechanism, the mechanism activates, releasing the high-pressure gas in a directional manner to prevent the cell casing from bursting.

[0062] By placing the second pressure relief mechanism on the top surface, the pressure relief port of the battery cell naturally faces upwards, forming a vertical correspondence with the upper-level fire-fighting medium outlet. After the fire-fighting medium is sprayed, it directly covers the pressure relief area, cooling the second pressure relief mechanism and its surroundings, reducing the likelihood of it opening its valve to release pressure. This arrangement facilitates efficient fire-fighting by aligning the pressure relief port of the battery cell with the upper-level fire-fighting medium outlet. Even if there is a battery cover separating the second pressure relief mechanism from the upper-level fire-fighting medium outlet, the battery cover can still be cooled for fire-fighting purposes even when some of the second pressure relief mechanism is releasing pressure. This reduces the likelihood of the second pressure relief mechanism opening its valve to release pressure, preventing impact on other battery devices; it also reduces the likelihood of the second pressure relief mechanism on other battery cells opening its valve to release pressure, thus reducing the number of battery cells experiencing thermal runaway.

[0063] Optionally, the battery device has at least one first pressure relief mechanism located on the top surface of the battery device, and the first pressure relief mechanism of the lower battery device is correspondingly provided with at least one fire-fighting medium outlet on the upper battery device.

[0064] In this technical solution, the lower-level battery device can have one or more first pressure relief mechanisms. At least some of these first pressure relief mechanisms correspond to one or more fire-fighting medium outlets on the upper level. For example, each first pressure relief mechanism corresponds to one or more fire-fighting medium outlets on the upper level. This ensures that fire-fighting medium discharged from at least one fire-fighting medium outlet on the upper-level battery device can directly act on the first pressure relief mechanism to extinguish the fire. By directly corresponding the fire-fighting medium outlet to the first pressure relief mechanism, the probability of valve opening and pressure relief in the battery device can be reduced, avoiding impact on battery devices on other levels and reducing the number of battery devices experiencing thermal runaway.

[0065] Optionally, the battery device includes at least one battery cell, the battery cell having a second pressure relief mechanism located on the top surface of the battery cell, and the second pressure relief mechanism of the battery cell of the lower battery device corresponding to at least one fire-fighting medium outlet on the upper battery device.

[0066] For example, fire-fighting medium discharged from at least one fire-fighting medium outlet of the upper battery unit can act on at least one second pressure relief mechanism of the lower battery unit.

[0067] In this technical solution, each battery device includes one or more battery cells. The second pressure relief mechanism of each battery cell corresponds to one or more fire-fighting medium outlets of the upper battery device. This ensures that the fire-fighting medium discharged from at least one fire-fighting medium outlet in the upper battery device can act on the second pressure relief mechanism to directly extinguish the fire. By directly corresponding the fire-fighting medium outlet to the second pressure relief mechanism of each battery cell, the probability of valve opening and pressure relief in the battery cells can be reduced, avoiding impact on other battery cells and reducing the number of battery cells experiencing thermal runaway.

[0068] In the case where there is a battery cover separating the second pressure relief mechanism from the upper fire-fighting medium outlet, the fire-fighting medium discharged from at least one fire-fighting medium outlet in the upper battery device can cool the battery cover while partially depressurizing the second pressure relief mechanism. This reduces the probability of the second pressure relief mechanism opening its valve to release pressure, thus avoiding impact on other battery cells. It also reduces the probability of the second pressure relief mechanism on other battery cells opening its valve to release pressure, thereby reducing the number of battery cells that experience thermal runaway.

[0069] The third aspect of this application proposes an energy storage system, including an energy conversion system and an energy storage device as described in any of the embodiments of the second aspect, wherein the energy conversion system is connected to the energy storage device to convert current input to or output from the energy storage device into energy.

[0070] The energy storage system proposed in this application, since it includes the energy storage device in any embodiment of the second aspect, therefore, has all the beneficial effects of the energy storage device in any embodiment of the second aspect, which will not be repeated here.

[0071] The fourth aspect of this application proposes a charging network including a charging pile; and an energy storage device according to any embodiment of the second aspect or an energy storage system according to any embodiment of the third aspect, wherein the energy storage device is used to provide electrical energy to the charging pile.

[0072] The charging network proposed in this application, since it includes the energy storage device in any embodiment of the second aspect or the energy storage system in any embodiment of the third aspect, has all the beneficial effects of the energy storage device in any embodiment of the second aspect or the energy storage system in any embodiment of the third aspect, which will not be repeated here.

[0073] Energy storage devices can be energy storage containers.

[0074] In any of the above embodiments, optionally, there are multiple battery devices, which are arranged sequentially at intervals along the height direction.

[0075] In this embodiment, the energy storage device includes multiple battery units, each of which integrates a cold plate assembly for liquid cooling and fire suppression. The battery units are arranged sequentially at intervals along the height direction, i.e., vertically arranged from bottom to top, with a certain vertical spacing between adjacent battery units. Each battery unit includes a housing, an internal battery module, and a cold plate assembly. The housing is a metal frame structure providing mechanical protection; the battery module is an array of multiple battery cells fixed inside the housing; the cold plate assembly includes a first plate (flow channel plate) and a second plate (cover plate), which are fitted together to form a heat exchange flow channel and at least two fire suppression flow channels. A connecting member is installed on the lower surface of the second plate and fixed by threaded connectors and press-fit nuts to connect different fire suppression flow channels.

[0076] In this embodiment, the battery devices are spaced apart along the height direction to avoid excessive horizontal extension, saving lateral space in containers or vehicle compartments and increasing battery capacity per unit area.

[0077] Additional aspects and advantages of the invention will become apparent in the following description or may be learned by practice of the invention. Attached Figure Description

[0078] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0079] Figure 1 One of the structural schematic diagrams of a cold plate assembly according to an embodiment of the present invention is shown;

[0080] Figure 2 A second schematic diagram of the structure of a cold plate assembly according to an embodiment of the present invention is shown;

[0081] Figure 3 One of the structural schematic diagrams of the first plate of a cold plate assembly according to an embodiment of the present invention is shown;

[0082] Figure 4 One of the partial structural schematic diagrams of a cold plate assembly according to an embodiment of the present invention is shown;

[0083] Figure 5 A second partial structural schematic diagram of a cold plate assembly according to an embodiment of the present invention is shown;

[0084] Figure 6 A second schematic diagram of the structure of the first plate of a cold plate assembly according to an embodiment of the present invention is shown;

[0085] Figure 7 A third schematic diagram of the structure of a cold plate assembly according to an embodiment of the present invention is shown;

[0086] Figure 8 A schematic diagram of the structure of a battery device according to an embodiment of the present invention is shown;

[0087] Figure 9 A schematic diagram of the structure of an energy storage device according to an embodiment of the present invention is shown;

[0088] Figure 10 This is a schematic diagram of the energy storage system in some embodiments of this application;

[0089] Figure 11 This is a schematic diagram of the charging network structure in some embodiments of this application.

[0090] The components include: 100 cold plate assembly, 1 cold plate, 10 heat exchange channel, 102 sub-channel, 11 fire-fighting channel, 12 first plate, 122 first groove, 1222 sub-groove, 124 second groove, 13 second plate, 132 first mounting hole, 14 fire-fighting medium outlet, 15 fire-fighting inlet, 16 heat exchange medium inlet, 17 heat exchange medium outlet, 2 connecting piece, 22 recess, 24 second mounting hole, 3 connecting channel, 4 connecting port, 5 threaded connector, 6 nut, 200 battery device, 210 battery top cover, 220 lower housing, 230 battery module, 300 energy storage device, 310 bracket, 400 energy conversion system, 500 power generation equipment, 600 charging pile, and 610 connector. Detailed Implementation

[0091] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0092] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0093] The following reference Figures 1 to 11 This invention describes battery devices, energy storage devices, energy storage systems, and charging networks proposed according to some embodiments of the present invention.

[0094] With the rapid development of new energy technologies, battery devices (such as electric vehicle power battery packs and energy storage battery packs) are constantly improving in terms of energy density and charging / discharging efficiency. However, during operation, they are prone to generating a large amount of heat due to internal electrochemical reactions, external short circuits, or overcharging. If the heat cannot be dissipated in time, it may lead to thermal runaway and even cause a fire risk. Therefore, battery devices usually need to be equipped with liquid cooling systems to absorb heat through circulating heat exchange media (such as coolant) and maintain a stable battery operating temperature. At the same time, in order to deal with the fire hazards caused by thermal runaway, fire suppression systems are also required to quickly suppress the spread of fire by spraying fire extinguishing media (such as gaseous or liquid fire extinguishing agents).

[0095] In related technologies, liquid cooling systems and fire protection systems are often designed independently: liquid cooling systems typically include dedicated liquid cooling plates, heat exchange channels, and supporting piping; fire protection systems require additional fire protection piping, nozzles, or fire-fighting medium outlets. In this separate design, the liquid cooling plates and fire protection piping are separate components, leading to an increased number of parts in the battery pack and more complex assembly processes, increasing both manufacturing costs and overall weight. Secondly, the independent layout of liquid cooling and fire protection systems results in a larger space occupied by the battery pack, hindering the optimization of space utilization.

[0096] To solve the above problems, such as Figures 1 to 8As shown, this embodiment provides a battery device 200, including a cold plate assembly 100. The cold plate assembly 100 is a double-layer cold plate with a first plate 12 (flow channel plate) and a second plate 13 (cover plate) bonded together. The first plate 12 is formed by stamping or milling to form a first groove 122 for heat exchange and multiple independent second grooves 124. The second plate 13 is a flat cover plate. After the two are bonded together, they respectively form a closed heat exchange flow channel 10 (closed by the first groove 122 and the two plates) and multiple independent fire-fighting flow channels 11 (closed by each second groove 124 and the two plates). The connecting piece 2 is installed on the side of the second plate 13 away from the first plate 12. Its recessed part 22 near the cold plate 1 and the outer surface of the second plate 13 form a connecting channel 3 for connecting different fire-fighting flow channels 11 to achieve medium diversion. The connecting piece 2 is fixed by bolts to the rivet nuts pre-placed on the first plate 12. The fire inlet 15 and the heat exchange medium inlet and outlet are integrated into the cold plate 1. The fire inlet 15 directly connects to part of the fire-fighting flow channel 11, and the rest are diverted through the connecting channel 3. In addition, multiple fire-fighting flow channels 11 are interspersed between the heat exchange flow channels 10.

[0097] At the same time, such as Figure 9 As shown, multiple battery devices 200 can constitute an energy storage container (energy storage device 300). These battery devices 200 are arranged sequentially at intervals along the height direction within the energy storage container, supported by brackets 310. This allows the upper battery devices 200 to extinguish fires on the lower battery devices 200. Specifically, after a fire breaks out in a lower battery device 200, the corresponding fire inlet 15 of the upper battery device 200 can be opened, allowing fire extinguishing media to enter the cold plate assembly 100 of the upper battery device and then flow out from the bottom of the cold plate assembly 100, thus extinguishing the fire on the lower battery device 200.

[0098] In this embodiment, liquid cooling and fire suppression functions are integrated into the same cold plate 1, eliminating the need for separate liquid cooling plates 1 and fire suppression piping. This reduces the number of parts and assembly steps, lowering manufacturing costs and the weight of the battery device 200. Simultaneously, each battery module 230 is individually equipped with a fire suppression channel 11, ensuring that the fire suppression channel 11 covers all battery modules 230. This guarantees the uniform distribution of the fire suppression channel 11 within the battery device 200, avoiding blind spots caused by missing channels. When any battery module 230 catches fire, it can quickly receive fire suppression medium coverage, improving overall fire suppression efficiency. Furthermore, in this embodiment, multiple fire suppression channels 11 are interspersed between heat exchange channels 10, maximizing the utilization of the internal space of the cold plate 1, resulting in a more compact structure. This also allows multiple fire suppression channels 11 to be distributed throughout the entire cold plate 1, increasing the number of fire suppression channels 11 on the cold plate 1 and improving their uniform distribution. This ensures that fire suppression basically covers the entire area of ​​the cold plate 1, eliminating protective gaps and improving the consistency of overall fire suppression.

[0099] The battery device 200 in this embodiment is specifically a power battery. The battery device 200 can be used in user equipment such as vehicles or energy storage devices. The battery assembly can specifically be a battery pack, a battery module 230, or a battery box.

[0100] The battery apparatus 100 mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells connected in series, parallel, or in a mixed configuration via a busbar.

[0101] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0102] As an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form an independent module. As another example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0103] In some embodiments, the battery device 200 may be a battery pack, which includes a housing and one or more individual battery cells housed within the housing.

[0104] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0105] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0106] As an example, the enclosure may include a first enclosure and a second enclosure. The first enclosure and the second enclosure are fastened together to form a closed space inside the enclosure to house the individual battery cells. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first enclosure may be a top cover or a bottom plate.

[0107] As an example, the enclosure may include a top cover, a frame, and a bottom plate. The top cover and bottom plate are connected to the frame, creating an enclosed space inside the enclosure to house the individual battery cells.

[0108] In some embodiments, the housing may be part of the vehicle's chassis structure. For example, a portion of the housing may be at least a part of the vehicle's floor, or a portion of the housing may be at least a part of the vehicle's crossbeams and longitudinal beams.

[0109] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use individual battery cells, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft.

[0110] like Figure 1 , Figure 2 and Figure 3 As shown, a first aspect of the present invention provides a battery device 200, including a cold plate assembly 100. The cold plate assembly 100 includes a cold plate 1 and at least one connecting member 2. The cold plate 1 is internally machined to form a heat exchange channel 10 and at least two independently arranged fire-fighting channels 11. The heat exchange channel 10 is used to contain a heat exchange medium, and the heat generated by the battery operation is absorbed by the circulating flow of the heat exchange medium to achieve liquid cooling. Each fire-fighting channel 11 is independently arranged and not interconnected. A fire-fighting medium outlet 14 is opened on the cold plate 1 at the position corresponding to each fire-fighting channel 11, and the fire-fighting medium can be directly sprayed into the fire area inside the battery device 200 through the fire-fighting medium outlet 14. At least one connecting member 2 is installed on the cold plate 1, and the connecting member 2 is tightly fitted with the outer surface of the cold plate 1, and the two together form at least one closed connecting channel 3. The function of the connecting channel 3 is to connect at least two fire-fighting channels 11, so that the fire-fighting medium can be distributed and flowed between different fire-fighting channels 11. Fire inlet 15 is located on cold plate 1 or at least one connecting piece 2. Fire inlet 15 is directly connected to connecting channel 3 or part of fire flow channel 11 for introducing external fire-fighting medium. Heat exchange medium inlet 16 and heat exchange medium outlet 17 are both located on cold plate 1. Heat exchange medium inlet 16 is connected to the inlet end of heat exchange flow channel 10, and heat exchange medium outlet 17 is connected to the outlet end of heat exchange flow channel 10. Heat exchange medium can enter the flow channel from the inlet of heat exchange flow channel 10, complete circulation and heat absorption, and then be discharged from the outlet of heat exchange flow channel 10.

[0111] The cold plate 1 is typically made of aluminum alloy to ensure good thermal conductivity. Heat exchange channels 10 are formed inside the cold plate 1 by stamping or milling, and are arranged in a serpentine or parallel pattern to increase the heat exchange area. Fire-fighting channels 11 are independently stamped channels, each corresponding to a battery module 230 area within the battery device 200. The connecting piece 2 can be a stamped metal part that matches the upper surface of the cold plate 1, and is fixed to the cold plate 1 by welding or bolting, covering the areas corresponding to the two fire-fighting channels 11. It fits against the surface of the cold plate 1 to form a connecting channel 3, with both ends connected to the inlets of the two fire-fighting channels 11.

[0112] Among them, such as Figure 8 and Figure 9As shown, the battery assembly 200 also includes a lower housing 220, the bottom of which has a hollow structure. A cold plate assembly 100 is installed on the bottom of the lower housing 220 to close the bottom of the lower housing 220. The battery assembly 200 also includes a battery module 230, which is installed on the cold plate assembly 100. The cold plate assembly 100 is mainly used for cooling and heating the battery module 230.

[0113] In this embodiment, liquid cooling and fire protection functions are integrated into the same cold plate 1, eliminating the need for separate liquid cooling plates 1 and fire protection piping. This reduces the number of parts and assembly steps in the battery device 200, lowering its manufacturing cost and weight. At least two independently configured fire protection channels 11 avoid the risk of fire protection failure due to a single channel malfunction, improving fire protection reliability. The connecting channel 3 formed by the connecting member 2 and the cold plate 1 replaces additional fire protection piping, simplifying the structure and reducing the possibility of media leakage.

[0114] In any of the above embodiments, optionally, as Figure 1 , Figure 2 and Figure 3 As shown, the heat exchange medium inlet 16, the heat exchange medium outlet 17 and the fire inlet 15 are located on the same side of the cold plate assembly 100, and the fire inlet 15 is located between the heat exchange medium inlet 16 and the heat exchange medium outlet 17.

[0115] In these embodiments, the heat exchange medium inlet 16, the heat exchange medium outlet 17, and the fire inlet 15 are all located on the same side of the cold plate 1, with the fire inlet 15 positioned between the heat exchange medium inlet 16 and the heat exchange medium outlet 17. Specifically, the cold plate 1, as an integrated structural component, has three interfaces machined on the same edge region of its outer surface: the heat exchange medium inlet 16 connects to the inlet end of the heat exchange channel 10 for introducing the heat exchange medium; the heat exchange medium outlet 17 connects to the outlet end of the heat exchange channel 10 for discharging the heat exchange medium after heat exchange; and the fire inlet 15 connects to the connecting channel 3 formed by the connecting member 2 or directly to the fire channel 11 for introducing external fire-fighting media. The three interfaces are arranged laterally or longitudinally along one side of the cold plate 1, with the fire inlet 15 positioned in the middle between the heat exchange medium inlet 16 and the heat exchange medium outlet 17. The three interfaces can be fixed to the cold plate 1 by welding or threaded connection, forming a concentrated interface area.

[0116] By arranging the heat exchange medium inlet 16, heat exchange medium outlet 17, and fire inlet 15 on the same side, the problem of pipe routing caused by dispersing these components on multiple sides of the cold plate 1 is avoided. The fire inlet 15 is located in the middle, allowing the connecting pipes for the heat exchange medium and fire-fighting medium to exit from the same side, reducing overlap between different pipes. For example, when the battery unit 200 is installed in an energy storage container, the side of the cold plate 1 with the heat exchange medium inlet 16, heat exchange medium outlet 17, and fire inlet 15 can face the outside of the container, allowing external heat exchange medium pipes and fire-fighting water pipes to be directly connected from the same side, eliminating the need to reserve space inside the container or on the other side of the cold plate 1, thus simplifying the installation process.

[0117] In any of the above embodiments, optionally, the battery device 200 contains one or more battery modules 230, each battery module 230 corresponding to at least one fire-fighting channel 11. Exemplarily, the battery modules 230 are typically arranged in an array within the battery device 200, for example, a matrix of six modules arranged in three columns along the length direction and two rows along the width direction of the cold plate 1. Fire-fighting channels 11 are independently machined within the cold plate 1 for each module area. Each fire-fighting channel 11 is a groove-shaped structure extending along the module outline, and the number corresponds one-to-one with the modules or is adjusted according to the module power density. For example, high-power modules correspond to two parallel fire-fighting channels 11, and low-power modules correspond to one, ensuring consistent fire-fighting coverage per unit area.

[0118] By configuring a separate fire-fighting channel 11 for each battery module 230, the delivery path of the fire-fighting medium is made more direct. That is, after the fire-fighting medium enters the fire-fighting channel 11 through its inlet, it does not need to be diverted to other modules and can be directly sprayed onto the cell area of ​​the target module, shortening the medium diffusion time. Simultaneously, configuring a separate fire-fighting channel 11 for each battery module 230 ensures that the fire-fighting channel 11 covers all battery modules 230, thus ensuring the uniform distribution of the fire-fighting channel 11 within the battery device 200. This avoids blind spots caused by missing channels, ensuring that any battery module 230 can quickly receive fire-fighting medium coverage when it catches fire, improving overall fire extinguishing efficiency. The uniformly distributed fire-fighting channel 11 also reduces the impact of manufacturing errors on the protective effect, making the fire-fighting performance of different batches of battery devices 200 more stable.

[0119] In any of the above embodiments, optionally, as Figure 1 , Figure 2 and Figure 3 As shown, the heat exchange channel 10 includes a plurality of sub-channels 102 arranged sequentially at intervals. The ends of the plurality of sub-channels 102 are connected sequentially. Any fire-fighting channel 11 is arranged between two adjacent sub-channels 102. The extension direction of the sub-channels 102 is consistent with the extension direction of the fire-fighting channel 11.

[0120] In these embodiments, the heat exchange channel 10 is composed of a plurality of sub-channels 102 arranged sequentially at intervals, and the plurality of sub-channels 102 are connected end to end to form a complete heat exchange path. Any fire-fighting channel 11 is disposed between two adjacent sub-channels 102, and the extension direction of the sub-channels 102 and the fire-fighting channel 11 is consistent. Specifically, the sub-channels 102 can be parallel straight channels extending along the length of the cold plate 1, with adjacent sub-channels 102 spaced equally apart, and connected by the end of the previous sub-channel 102 to the beginning of the next sub-channel 102, forming a serpentine or parallel overall heat exchange channel 10. The fire-fighting channel 11 also extends along the length of the cold plate 1, is embedded in the gap area between adjacent sub-channels 102, shares the upper and lower surface space of the cold plate 1 with the sub-channels 102 but maintains an independent structure, and the fire-fighting medium outlet 14 is opened on the surface of the fire-fighting channel 11 and points to the corresponding battery module 230.

[0121] The spaced distribution of sub-channels 102 makes the flow of heat exchange medium within the cold plate 1 more uniform, avoiding differences in heat exchange efficiency caused by excessively fast or slow local flow velocities; the fire-fighting channel 11 is located between the sub-channels 102, making full use of the internal space of the cold plate 1 and reducing the occupation of additional structures; the sub-channels 102 and the fire-fighting channel 11 extend in the same direction, which facilitates the one-time forming of the cold plate 1 during stamping, reducing processing difficulty and cost.

[0122] In this embodiment, multiple fire-fighting channels 11 are interspersed among multiple sub-channels 102, which maximizes the utilization of the internal space of the cold plate 1 and makes the structure more compact. At the same time, multiple fire-fighting channels 11 can be distributed throughout the entire cold plate 1, thereby increasing the number of fire-fighting channels 11 on the cold plate 1 and improving the uniformity of the distribution of fire-fighting channels on the entire cold plate 1. This allows fire protection to basically cover the entire area of ​​the cold plate 1, eliminates protective gaps, and improves the consistency of overall fire suppression.

[0123] In any of the above embodiments, optionally, as Figure 1 , Figure 2 and Figure 3 As shown, at least two sub-channels 102 are provided between two adjacent fire-fighting flow channels 11.

[0124] In these embodiments, at least two sub-channels 102 are provided between two adjacent fire-fighting channels 11, so that the total number of sub-channels 102 is significantly greater than that of fire-fighting channels 11, the total area of ​​heat exchange channels 10 (composed of sub-channels 102) is higher, more internal space of cold plate 1 is used for heat exchange medium flow, the overall heat exchange capacity of cold plate 1 is enhanced, and the cooling or heating effect of cold plate 1 on battery is ensured.

[0125] Optionally, such as Figure 1 , Figure 3 and Figure 6 As shown, the number of sub-channels 102 set between two adjacent fire-fighting channels 11 is the same.

[0126] In these embodiments, the number of sub-channels 102 between two adjacent fire-fighting flow channels 11 is the same, meaning that the heat exchange structure of each fire-fighting flow channel 11 interval area in the cold plate 1 is completely symmetrical. Each interval area contains the same number of sub-channels 102, and these sub-channels 102 are connected end to end to form a complete heat exchange flow channel 10. This design ensures that the flow path length and flow cross-sectional area of ​​the heat exchange medium in each interval area are completely consistent, and the medium flow velocity and flow rate distribution are more balanced. This avoids uneven local heat exchange efficiency caused by differences in the number of sub-channels 102, and improves the stability of the overall cooling effect of the battery device 200.

[0127] Meanwhile, the consistent layout of the number of sub-channels 102 enhances the symmetry of the cold plate 1 structure. The mold is subjected to uniform force during stamping, which reduces the risk of channel deviation or deformation caused by processing errors. The heat exchange and fire protection performance of different batches of cold plates 1 are more similar, improving production consistency.

[0128] In any of the above embodiments, optionally, as Figure 1 and Figure 3 As shown, the two outermost sub-channels 102 of the multiple sub-channels 102 are both arranged adjacent to one of the fire-fighting channels 11.

[0129] In these embodiments, the heat exchange channel 10 is composed of a plurality of sub-channels 102 arranged sequentially at intervals, and the plurality of sub-channels 102 are connected end to end to form a complete heat exchange path. Among the plurality of sub-channels 102, the two outermost sub-channels 102 (the leftmost sub-channel 102 and the rightmost sub-channel 102 along the arrangement direction of the sub-channels 102) are each arranged adjacent to a fire-fighting channel 11. Specifically, multiple sub-channels 102 are distributed in parallel along the length direction inside the cold plate 1, and the spacing between adjacent sub-channels 102 is uniform; the right side of the leftmost sub-channel 102 is adjacent to a fire-fighting channel 11, and the left side of the rightmost sub-channel 102 is adjacent to another fire-fighting channel 11, forming a symmetrical layout of "sub-channel 102-fire-fighting channel 11-sub-channel 102-fire-fighting channel 11-sub-channel 102-fire-fighting channel 11".

[0130] In this embodiment, since the two outermost sub-channels 102 are both adjacent to the fire-fighting channel, the fire-fighting channel 11 is not limited to the middle area, but is distributed from the edge to the whole length, basically covering the entire area of ​​the cold plate 1. This increases the number of fire-fighting channels 11 and ensures the uniformity of the distribution of fire-fighting channels 11 on the cold plate 1.

[0131] In any of the above embodiments, optionally, as Figure 1 and Figure 3As shown, the fire inlet 15 is located on the cold plate 1 and is connected to a portion of the fire flow channel 11. The cold plate assembly 100 includes at least two connecting ports 4, located on the cold plate 1, for connecting at least two fire flow channels 11 and connecting passage 3.

[0132] In these embodiments, the fire inlet 15 is disposed on the cold plate 1 and directly communicates with part of the fire flow channel (the first fire flow channel). The fire flow channel that is not directly connected (the second fire flow channel) is connected to the first fire flow channel through the connecting member 2. By placing the fire inlet 15 on the cold plate 1, the connecting member 2 does not need to be designed with an additional docking structure for the fire medium inlet; it only needs to retain the communication function with the fire flow channel 11, thereby simplifying the overall structure of the connecting member 2. At the same time, the cold plate 1 already has a heat exchange medium inlet 16 and a heat exchange medium outlet 17. When adding the fire inlet 15, the existing layout of the cold plate 1 can be utilized and the stamping or milling process can be carried out simultaneously without significantly adjusting the structure of the cold plate 1 or adding special materials. Therefore, it will not significantly increase the manufacturing cost, nor will it make the overall structure of the cold plate 1 more complex. This design achieves the fire inlet 15 and communication function by reusing the cold plate 1, simplifying the components while maintaining the compactness and economy of the structure.

[0133] In any of the above embodiments, optionally, as Figure 1 , Figure 2 and Figure 3 As shown, the cold plate 1 comprises two parts: a first plate 12 and a second plate 13. The surface of the first plate 12 is machined with a first groove 122 and multiple independent second grooves 124. The second plate 13 is a flat plate without complex structure and is tightly attached to the first plate 12 by welding or brazing. The heat exchange channel 10 is a closed channel formed by the lower surface of the second plate 13 and the bottom and side walls of the first groove 122, used to accommodate the circulating flow of heat exchange medium (such as coolant) and absorb the heat generated by battery operation. Multiple fire-fighting channels 11 are independent closed channels formed by the lower surface of the second plate 13 and the bottom and side walls of each second groove 124. Each fire-fighting channel 11 corresponds to a battery module 230 area within the battery device 200, and its surface is provided with fire-fighting medium outlet holes 14 for guiding fire-fighting medium (such as water or aerosol) to be sprayed towards the corresponding module.

[0134] In this embodiment, the flat plate characteristic of the second plate 13 means that when designing the second plate 13, there is no need to customize the structure of the second plate to match the complex flow channels, which reduces the mold cost and stamping difficulty; the heat exchange flow channel 10 and the fire protection flow channel 11 are both surrounded by the groove of the first plate 12 and the second plate 13, sharing the material and processing steps of the first plate 12, reducing material consumption; the independent second groove 124 ensures that each fire protection flow channel 11 does not interfere with each other, and avoids the failure of a single flow channel from affecting the protection of other modules.

[0135] In any of the above embodiments, optionally, as Figure 3 , Figure 5 and Figure 6 As shown, the first groove 122 includes a plurality of sub-grooves 1222 arranged sequentially at intervals, with the beginning and end of the plurality of sub-grooves 1222 connected sequentially. The second groove 124 is disposed between two adjacent sub-grooves 1222, and the extension direction of the sub-grooves 1222 is consistent with the extension direction of the second groove 124.

[0136] In these embodiments, multiple second grooves 124 are interspersed among multiple sub-grooves 1222, which maximizes the utilization of the internal space of the cold plate 1 and makes the structure more compact. At the same time, multiple second grooves 124 can be distributed throughout the entire cold plate 1, thereby increasing the number of second grooves 124 on the cold plate 1 and improving the uniformity of the distribution of second grooves 124 on the entire cold plate 1. This allows fire protection to basically cover the entire area of ​​the cold plate 1, eliminates protection gaps, and improves the consistency of overall fire extinguishing.

[0137] in, Figure 6 The extension direction in the text indicates the extension direction of the sub-groove 1222 and the extension direction of the second groove 124.

[0138] The first plate 12 can be a base plate (also called a flow channel plate). The second plate 13 is installed above the base plate and is a top plate (also called a cover plate). This design allows the fire-fighting medium in the fire-fighting flow channel 11 to flow directly from the bottom of the cold plate 1 after the cold plate 1 is installed, so as to extinguish the fire on objects below the battery device 200 (such as the next layer of battery device 200).

[0139] In any of the above embodiments, optionally, as Figure 1 , Figure 2 and Figure 3 As shown, the connecting member 2 is installed on the surface of the second plate 13 facing away from the first plate 12, and the fire medium outlet 14 is provided on the bottom wall of the second groove 124. When the fire flow channel 11 is provided with multiple fire medium outlets 14, the multiple fire medium outlets 14 are spaced apart along the extension direction of the fire flow channel 11.

[0140] In these embodiments, the connecting member 2 is installed on the surface of the second plate 13 away from the first plate 12 (i.e., the lower surface of the lower plate), and the fire medium outlet 14 is opened at the bottom wall of the second groove 124 on the first plate 12. When a single fire channel 11 corresponds to multiple fire medium outlets 14, these fire medium outlets 14 are arranged at intervals along the extension direction of the fire channel 11.

[0141] In this design, the fire-fighting medium outlet 14 is located on the bottom wall of the second trench 124. The second trench 124 itself corresponds to the position layout of the next layer battery device. The fire-fighting medium outlet 14 on the bottom wall can directly spray the fire-fighting medium to the next layer battery device, avoiding coverage offset caused by the fire-fighting medium outlet 14 being on the side wall or other positions, and ensuring that the medium can directly act on the next layer battery device.

[0142] In any of the above embodiments, optionally, as Figure 1 and Figure 2 As shown, the surface of the connecting member 2 near the cold plate 1 is provided with a recessed portion 22 that is recessed in the direction away from the cold plate 1, and the connecting channel 3 is formed by the recessed portion 22 and the outer surface of the cold plate 1.

[0143] In these embodiments, the surface of the connecting member 2 near the cold plate 1 is machined with a recessed portion 22 that is recessed in the direction away from the cold plate 1, and the connecting channel 3 is formed by the recessed portion 22 and the outer surface of the cold plate 1.

[0144] Among them, the connecting part 2 can be a metal stamping part (such as aluminum alloy material), and its shape matches the outer surface of the cold plate 1. The surface near the cold plate 1 is not flat, but has a recessed structure.

[0145] By providing a recess 22 on the connecting member 2, a connecting channel 3 can be formed by the connecting member 2 and the cold plate 1, which simplifies the structure of the entire cold plate 1.

[0146] In any of the above embodiments, optionally, as Figure 1 , Figure 4 , Figure 5 and Figure 6 As shown, the cold plate 1 and the connecting member 2 are connected by a threaded connector 5. A nut 6 is provided inside the cold plate 1 to lock the threaded connector 5. The cold plate 1 is provided with a first mounting hole 132 for the threaded connector 5 to pass through, and the connecting member 2 is provided with a second mounting hole 24 for the threaded connector 5 to pass through.

[0147] In these embodiments, the cold plate 1 and the connecting member 2 are connected by a threaded connector 5. A nut 6 is pre-installed in the cold plate 1, which is fixed in place by engaging the first mounting hole 132 of the cold plate 1 with the second mounting hole 24 of the connecting member 2. This design allows for quick assembly and disassembly without welding or gluing, simplifying the assembly and maintenance process; the pre-installed nut 6 eliminates the need for additional parts, reducing assembly steps; the aligned mounting holes ensure accurate connection positions, reducing the risk of misalignment; and the threaded engagement with the sealing element reduces the probability of media leakage and improves structural stability.

[0148] Among them, nut 6 is a press-fit nut. During installation, matching holes can be pre-punched on the first plate 12, and then the press-fit machine can be used to align nut 6 with the holes and apply pressure until nut 6 is tightly joined with the plate.

[0149] In any of the above embodiments, optionally, as Figure 1 , Figure 4 , Figure 5 and Figure 6 As shown, the cold plate 1 includes a first plate 12 and a second plate 13 connected to each other. The heat exchange channel 10 and at least two fire-fighting channels 11 are surrounded by the first plate 12 and the second plate 13. The connecting member 2 is installed on the surface of the second plate 13 facing away from the first plate 12. The nut 6 is installed on the first plate 12. The first mounting hole 132 is provided on the second plate 13.

[0150] In these embodiments, the cold plate 1 includes a first plate 12 and a second plate 13 connected to each other, wherein the first plate 12 is a flow channel plate. The heat exchange flow channel 10 and at least two fire-fighting flow channels 11 are formed by the first plate 12 and the second plate 13. The connecting member 2 is installed on the surface of the second plate 13 opposite to the first plate 12 (i.e., the upper surface of the second plate 13) for connecting different fire-fighting flow channels 11; the nut 6 is directly installed inside the first plate 12 (flow channel plate); the first mounting hole 132 is opened on the second plate 13, corresponding to the second mounting hole 24 on the connecting member 2, for the threaded connector 5 (such as a bolt) to pass through, and cooperates with the nut 6 to lock the connecting member 2 onto the lower surface of the second plate 13.

[0151] In this embodiment, the first plate 12 serves as a flow channel plate, integrating the functions of flow channel forming and nut 6 fixing, reducing the use of independent fasteners; the second plate 13 serves only as a cover plate, requiring no complex processing and reducing mold costs. Both the heat exchange flow channel 10 and the fire-fighting flow channel 11 are formed by the two plates being bonded together, sharing materials and processing steps, resulting in a compact structure. The connecting piece 2 is fixed by bolts and press-fit nuts, ensuring reliable sealing and allowing for quick assembly and disassembly, facilitating maintenance of the fire-fighting flow channel 11. Nut 6 is pre-placed on the first plate 12, avoiding additional drilling or welding and improving the assembly efficiency of the cold plate 1.

[0152] In any of the above embodiments, optionally, as Figure 4 , Figure 5 and Figure 6 As shown, the nut 6 is installed on the first plate 12, avoiding the area of ​​the first plate 12 used to enclose the heat exchange channel 10 and the fire-fighting channel 11. Gaps are provided on both sides of the nut 6 between it and the heat exchange channel 10 and / or the fire-fighting channel 11. This arrangement prevents the nut 6 and the threaded connector 5 from obstructing the heat exchange channel 10 and the fire-fighting channel 11, and also prevents the nut 6 from being too close to the channels, thus avoiding a weak point in the first plate 12 and improving its strength.

[0153] In any of the above embodiments, optionally, as Figure 1 , Figure 2 and Figure 3As shown, there are four fire flow channels 11. The two fire flow channels 11 located in the middle are connected to the fire inlet 15. The two fire flow channels 11 located at the edges are connected to their adjacent fire flow channels 11 through a connecting piece 2.

[0154] Each battery device 200 contains two battery modules 230. Each battery module 230 corresponds to two fire-fighting flow channels 11 and four sub-flow channels 102.

[0155] Optionally, the first plate 12 is a stamped aluminum plate. The first plate 12 and the second plate 13 are connected by brazing.

[0156] Alternatively, the battery device 200 may be a battery pack or a battery box.

[0157] In any of the above embodiments, optionally, as Figure 3 , Figure 6 and Figure 8 As shown, the fire-fighting flow channel 11 is provided with a plurality of fire-fighting medium outlets 14, which are spaced apart along the extension direction of the fire-fighting flow channel 11. The battery device 200 also includes a plurality of battery cells, at least a portion of which are arranged sequentially along the extension direction of the fire-fighting flow channel 11.

[0158] In these embodiments, each fire-fighting channel 11 may be provided with multiple fire-fighting medium outlets 14 to improve the output efficiency of the fire-fighting medium and enhance the fire-fighting effect. The battery device 200 consists of multiple battery cells, which are arranged in one or more rows along the extension direction of the fire-fighting channel 11. This structure allows rows of battery cells to extinguish fires through the same fire-fighting channel 11, resulting in a wider coverage area for each fire-fighting channel 11.

[0159] For example, along the extension direction of the fire-fighting channel 11, the number of battery cells is the same as the number of fire-fighting medium outlets 14. This structure ensures that each battery cell is provided with a corresponding fire-fighting medium outlet 14, thus guaranteeing the fire-fighting effect for each battery cell.

[0160] like Figure 8 and Figure 9 As shown, the battery device 200 includes structures such as a battery cover 210, a battery module 230, and a lower housing 220. The battery cover 210, the lower housing 220, and the cold plate assembly 100 form a closed cavity to accommodate components such as the battery module 230.

[0161] like Figure 9 , Figure 10 and Figure 11As shown, a second aspect of this application provides an energy storage device 300, including at least one battery device 200 as described in any embodiment of the first aspect, the battery device 200 being used to store or provide electrical energy.

[0162] The energy storage device 300 proposed in this application includes one or more battery devices 200 as described in any embodiment of the first aspect, which are used to store or provide electrical energy. Therefore, this energy storage device 300 has all the beneficial effects of the battery device 200 in any embodiment of the first aspect, which will not be elaborated here.

[0163] like Figure 9 As shown, optionally, there are multiple battery devices 200, which are arranged sequentially along the height direction of the energy storage device 300. The fire-fighting medium discharged from the fire-fighting medium outlet 14 of the upper battery device can act on the lower battery device, so that the fire-fighting medium outlet 14 of the upper battery device 200 can perform fire-fighting operations on the lower battery device 200.

[0164] Multiple battery devices 200 are arranged sequentially at intervals along the height of the energy storage device 300, which allows a certain vertical distance to be maintained between adjacent battery devices 200.

[0165] Optionally, the battery device 200 has a first pressure relief mechanism located on the top surface of the battery device 200.

[0166] In these embodiments, the battery device 200 includes a first pressure relief mechanism. This first pressure relief mechanism serves as a safety component for releasing abnormally high-pressure gas inside the battery device 200. Specifically, it may be composed of components such as a rupture disc, a notched cover, or an openable valve body. When the internal cells of the battery device 200 abnormally generate gas and the pressure rises, the mechanism activates when it reaches the threshold of the first pressure relief mechanism, releasing the high-pressure gas in a directional manner to prevent the casing from bursting. The first pressure relief mechanism is positioned on the top surface, with the pressure relief port naturally facing upwards. This allows the first pressure relief mechanism to correspond with the fire-fighting medium outlet 14 of the upper battery device 200. The fire-fighting medium sprayed from the fire-fighting medium outlet 14 can directly cover the pressure relief area, cooling the battery device 200 and its surroundings, reducing the probability of valve opening and pressure relief, and preventing impact on other battery devices 200.

[0167] Optionally, the battery device 200 includes a battery cell having a second pressure relief mechanism located on the top surface of the battery cell.

[0168] In these embodiments, the battery cell includes a second pressure relief mechanism. This second pressure relief mechanism serves as a safety component for releasing abnormally high-pressure gas inside the battery cell. Specifically, it may be composed of components such as a miniature rupture disc, a top-scored cover, or a miniature openable valve. When abnormal gas generation and pressure rise inside the battery cell, and the pressure reaches the threshold of the second pressure relief mechanism, the mechanism activates, releasing the high-pressure gas in a directional manner to prevent the cell casing from bursting.

[0169] By placing the second pressure relief mechanism on the top surface, the pressure relief port of the battery cell naturally faces upward, which can be vertically aligned with the fire-fighting medium outlet 14 on the upper layer. After the fire-fighting medium is sprayed out, it directly covers the pressure relief area, cools the second pressure relief mechanism and its surroundings, and reduces the probability of it opening the valve to release pressure.

[0170] This configuration facilitates efficient fire suppression by aligning the pressure relief port of the battery cell with the upper fire-fighting medium outlet 14. Even if the second pressure relief mechanism is isolated from the upper fire-fighting medium outlet 14 by the battery cover 210, the battery cover 210 can still be cooled down for fire suppression even when the second pressure relief mechanism partially releases pressure. This reduces the likelihood of the second pressure relief mechanism opening its valve to release pressure, thus avoiding impact on other battery devices 200. Furthermore, it reduces the likelihood of the second pressure relief mechanism on other battery cells opening its valve to release pressure, thereby reducing the number of battery cells that experience thermal runaway.

[0171] Optionally, the battery device 200 has at least one first pressure relief mechanism located on the top surface of the battery device 200, and the first pressure relief mechanism of the lower battery device is correspondingly provided with at least one fire-fighting medium outlet 14 on the upper battery device.

[0172] In this technical solution, the lower-layer battery device can have one or more first pressure relief mechanisms. At least some of these first pressure relief mechanisms are configured to correspond to one or more fire-fighting medium outlets 14 on the upper layer. For example, each first pressure relief mechanism corresponds to one or more fire-fighting medium outlets 14 on the upper layer. This ensures that the fire-fighting medium discharged from at least one fire-fighting medium outlet 14 on the upper-layer battery device can directly act on the first pressure relief mechanism to extinguish the fire. By directly configuring the fire-fighting medium outlets 14 to correspond to the first pressure relief mechanisms, the probability of the battery device 200 opening its valve and releasing pressure can be reduced, avoiding impact on battery devices 200 on other layers and reducing the number of battery devices 200 experiencing thermal runaway.

[0173] Optionally, the battery device 200 includes at least one battery cell, the battery cell having a second pressure relief mechanism located on the top surface of the battery cell, and the second pressure relief mechanism of the battery cell of the lower battery device is correspondingly provided with at least one fire-fighting medium outlet 14 on the upper battery device.

[0174] For example, fire-fighting medium discharged from at least one fire-fighting medium outlet 14 of the upper battery device can act on at least one second pressure relief mechanism of the lower battery device.

[0175] In this technical solution, each battery device 200 includes one or more battery cells. The second pressure relief mechanism of each battery cell corresponds to one or more fire-fighting medium outlets 14 of the upper battery device, ensuring that the fire-fighting medium discharged from at least one fire-fighting medium outlet 14 in the upper battery device can act on the second pressure relief mechanism for direct fire suppression. By directly corresponding the fire-fighting medium outlet 14 to the second pressure relief mechanism of each battery cell, the probability of valve opening and pressure relief in the battery cell can be reduced, avoiding impact on other battery cells and reducing the number of battery cells experiencing thermal runaway.

[0176] In the case where there is a battery cover 210 separating the second pressure relief mechanism from the upper fire-fighting medium outlet 14, the fire-fighting medium discharged from at least one fire-fighting medium outlet 14 in the upper battery device can cool the battery cover 210 with fire-fighting while partially depressurizing the second pressure relief mechanism. On the one hand, this can reduce the probability of the second pressure relief mechanism opening its valve to release pressure, thus avoiding affecting other battery cells; on the other hand, it can reduce the probability of the second pressure relief mechanism on other battery cells opening its valve to release pressure, thus reducing the number of battery cells that experience thermal runaway.

[0177] The energy storage device according to embodiments of this application includes one or more battery clusters to increase the voltage and capacity of the energy storage device. A battery cluster may include multiple battery devices 200, which are connected in series via a busbar to increase the voltage of the energy storage device. When the energy storage device includes multiple battery clusters, the multiple battery clusters are connected in parallel to increase the capacity of the energy storage device.

[0178] Energy storage devices can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems. Energy storage devices can store electrical energy as needed and output it when appropriate. For example, an energy storage device can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours. The energy storage system provided in this application embodiment can be any power system that requires energy storage devices.

[0179] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0180] In some embodiments, the energy storage device may include a cabinet and one or more battery clusters housed within the cabinet.

[0181] In some embodiments, the energy storage device may include modules such as a thermal management module, a main control module, a central control module, a power distribution module, and a fire protection module.

[0182] As an example, the thermal management module may include a liquid cooling unit that supplies coolant to each battery device 200 via piping to regulate the temperature of the individual battery cells.

[0183] As an example, the main control module can serve as the battery management unit for the battery cluster, used to monitor and manage the battery cluster. The main control module can monitor information such as the current, voltage, power, or temperature of the battery cluster. For instance, it can control the charging and discharging current and voltage of the battery cluster. The main control module includes modules such as an auxiliary battery management unit (SBMU) and a fusion switch.

[0184] As an example, the central control module can serve as the battery management unit for an energy storage device, used to monitor and manage the device. The central control module can monitor information such as the energy storage device's current, voltage, power, state of charge, or temperature. For instance, it can control the charging and discharging current and voltage of the energy storage device. As an example, the central control module includes modules such as an Insulation Monitoring Module (IMM), a Master Battery Management Unit (MBMU), an Ethernet (ETH) module, and a fiber optic conversion module.

[0185] As an example, a fire protection system includes control panels, detectors, alarm devices, etc., used to detect, alarm, or extinguish fires in energy storage systems.

[0186] As an example, the power distribution unit can be used to distribute power to the power modules of the energy storage device.

[0187] like Figure 10 and Figure 11 As shown, the third aspect of this application proposes an energy storage system, including an energy conversion system 400 and an energy storage device 300 in any embodiment of the second aspect. The energy conversion system 400 is connected to the energy storage device 300 to convert energy into current input to the energy storage device 300 or output from the energy storage device 300.

[0188] The energy storage system proposed in this application, since it includes the energy storage device 300 in any embodiment of the second aspect, has all the beneficial effects of the energy storage device 300 in any embodiment of the second aspect, which will not be repeated here.

[0189] In some embodiments, such as Figure 10As shown, an energy storage system may include one or more energy storage devices 300 and a power conversion system 400 (PCS). The power conversion system 400 is used to connect the power generation equipment 500, the power grid, or a load to the energy storage devices 300. The power generation equipment 500 generates electrical energy, the energy storage device 300 stores electrical energy, and the power conversion system 400 converts the current input to the energy storage device 300 or the current output from the energy storage device 300 into energy. The electrical energy generated by the power generation equipment 500 can be stored in the energy storage device 300 through the power conversion system 400, and the electrical energy stored in the energy storage device 300 can also be output to the load or the power grid through the power conversion system 400. As an example, the power generation equipment 500 may specifically be a solar panel, a hydroelectric power generation device, a thermal power generation device, a wind power generation device, etc. The specific type of the power generation equipment 500 is not limited in this application.

[0190] like Figure 11 As shown, the fourth aspect of this application proposes a charging network including a charging pile 600; and an energy storage device 300 in any embodiment of the second aspect or an energy storage system in any embodiment of the third aspect, wherein the energy storage device 300 is used to provide electrical energy to the charging pile 600.

[0191] The charging network proposed in this application, since it includes the energy storage device 300 in any embodiment of the second aspect or the energy storage system in any embodiment of the third aspect, has all the beneficial effects of the energy storage device 300 in any embodiment of the second aspect or the energy storage system in any embodiment of the third aspect, which will not be repeated here.

[0192] The charging network provided in the embodiments of this application, such as Figure 11 As shown, the device includes a charging pile 600 and an energy storage device 300. The charging pile 600 is electrically connected to the energy storage device 300, which provides electrical energy to the charging pile 600. The charging pile 600 is electrically connected to a battery device 200 in the energy storage device 300 via a cable, and the battery device 200 can provide its stored electrical energy to the charging pile 600. The charging pile 600 has one or more connectors 610 for connecting to electrical equipment (such as a vehicle) to replenish the power of the equipment.

[0193] Energy storage devices can be located inside the charging pile (e.g., an integrated energy storage and charging unit) or outside the charging pile.

[0194] The energy storage device 300 can be an energy storage container.

[0195] The following describes a specific embodiment of the battery device 200 and the energy storage device 300.

[0196] As the size and capacity of energy storage cells continue to increase, the risk level of thermal runaway in electrical boxes (such as battery packs 200) rises significantly. Therefore, a fire suppression structure that can effectively control thermal runaway electrical boxes has become a current focus. To contain the energy generated by the thermal runaway electrical box internally and prevent the released flames from spreading to adjacent boxes, fire nozzles are typically added to the box panel. When a fire breaks out inside the box, after receiving a sensor command, fire extinguishing liquid (such as perfluorohexanone or water) enters the box through the nozzles to extinguish the fire. However, currently, the nozzles are mainly located at the front of the box and fixed to the panel. While this allows fire extinguishing liquid to be delivered to the front cells, it is less effective at extinguishing fires in the rear cells.

[0197] To address the aforementioned problems, this embodiment provides a multifunctional cold plate, the surface of which is welded with three inlet and outlet structural components (such as...). Figure 7 As shown). Figures 1 to 6 As shown, the top of the cold plate 1 is also provided with a flow channel bridging stamping structure fixed by bolts, which is used to connect two separate fire-fighting flow channels 11.

[0198] Specifically, the multi-functional cold-rolled plate is formed by brazing an upper flat plate and a lower stamped aluminum plate. The lower plate has stamped channels, punched holes, and press-fit nuts. There are two types of stamped channels: one is a coolant channel, which allows coolant to flow and carry away the heat generated by the battery cells; the other is a fire-fighting liquid channel, which has openings (i.e., punched holes) on its surface. There are multiple fire-fighting liquid channels, and each of the multiple fire-fighting liquid channels is independently set.

[0199] The upper plate surface is provided with coolant inlet and outlet, fire-fighting liquid inlet, and a bridging flow channel stamped component (connecting component 2). The bridging flow channel stamped component itself has a stamped groove, which can form a flow channel connecting two fire-fighting liquid flow channels with the upper plate surface. The upper plate has through holes in two locations for connecting two different fire-fighting liquid flow channels. Through holes are machined at the four corners of the flow channel bridging stamped component, and four through-hole nuts (press-fit nuts) are provided at corresponding positions on the lower surface of the cold plate 1. By engaging bolts with the through-hole nuts, the flow channel bridging stamped component can be locked and fixed to the cold plate 1.

[0200] The through-hole nuts (press-fit nuts) on the surface of the lower cold plate are positioned at a certain distance from the adjacent flow channels to prevent leakage caused by the flow channels being too close to the press-fit nuts.

[0201] The multifunctional cold plate provided in this embodiment combines liquid cooling and fire suppression functions, integrating both into a single component. This not only reduces costs but also improves manufacturing efficiency due to its simple structure. Furthermore, this structure uses separate fire suppression channels 11 connected by bridging stamped channel components, resulting in a simple and easily formed structure. The stamped channel components of the multifunctional cold plate (such as the lower cold plate) can be reused in different projects, improving the versatility of the lower cold plate components. In addition, in this embodiment, the multiple fire suppression liquid channels are more evenly distributed on the lower cold plate; therefore, the lower cold plate can provide continuous and comprehensive fire suppression for the lower burning chamber with the same amount of fire suppression liquid.

[0202] In any of the above embodiments, optionally, the nut 6 is installed on the first plate 12 and is positioned away from the area of ​​the first plate 12 used to enclose the heat exchange channel 10 and the fire-fighting channel 11, and gaps are provided on both sides of the nut 6 with the heat exchange channel 10 and / or the fire-fighting channel 11. This arrangement can prevent the nut 6 and the threaded connector 5 from blocking the heat exchange channel 10 and the fire-fighting channel 11, and at the same time, it can prevent the nut 6 from being too close to the channel, which would cause the first plate 12 to form a weak area, thus improving the strength of the first plate 12.

[0203] This embodiment also provides an energy storage device, which includes a battery device 200. The battery device 200 consists of an upper cover, a battery module 230, and a lower housing 220. The lower housing 220 includes a lower housing frame and the aforementioned multifunctional cold plate.

[0204] When power is supplied through the energy storage device, multiple battery units 200 can be stacked layer by layer using the bracket 310. In this way, if a fire occurs in a lower battery unit 200, the fire extinguishing liquid of the upper battery unit can be sprayed downwards through the openings on the multi-functional cold plate to achieve the fire extinguishing effect, thus preventing a situation where a fire in one battery unit 200 will cause all the other battery units 200 in the container to catch fire.

[0205] In this invention, the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "installed," "connected," "linked," and "fixed," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "linked" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0206] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. 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.

[0207] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A battery device, characterized in that, Includes a cold plate assembly, the cold plate assembly comprising: A cold plate, wherein a heat exchange channel and at least two independently arranged fire-fighting channels are provided inside the cold plate, and at least one fire-fighting medium outlet is provided on the cold plate in communication with the fire-fighting channels; At least one connecting member is installed on the cold plate and forms at least one communicating channel with the outer surface of the cold plate, the communicating channel connecting at least two of the fire-fighting flow channels; A fire inlet is provided on the cold plate or at least one of the connecting parts, and the fire inlet is connected to a portion of the fire flow channel or to the connecting channel; The cold plate is provided with a heat exchange medium inlet and a heat exchange medium outlet. The heat exchange medium inlet is connected to the inlet of the heat exchange channel, and the heat exchange medium outlet is connected to the outlet of the heat exchange channel. The cold plate includes: The first plate has a first groove and a plurality of independently arranged second grooves. The second plate is installed on the first plate, the heat exchange channel is formed by the second plate and the first groove, and the plurality of fire-fighting channels are formed by the second plate and the plurality of second grooves; The first plate is a base plate, and the second plate is installed on top of the base plate; The connecting member is installed on the surface of the second plate opposite to the first plate, and the fire-fighting medium outlet is located on the bottom wall of the second trench.

2. The battery device according to claim 1, characterized in that, The heat exchange medium inlet, the heat exchange medium outlet, and the fire-fighting inlet are located on the same side of the cold plate assembly, and the fire-fighting inlet is located between the heat exchange medium inlet and the heat exchange medium outlet.

3. The battery device according to claim 1, characterized in that, The battery device is provided with one or more battery modules, and each battery module is provided with at least one of the fire-fighting flow channels.

4. The battery device according to claim 1, characterized in that, The heat exchange channel includes multiple sub-channels arranged sequentially at intervals, with the ends of the multiple sub-channels connected sequentially. Any one of the fire-fighting channels is located between two adjacent sub-channels, and the extension direction of the sub-channel is consistent with the extension direction of the fire-fighting channel.

5. The battery device according to claim 4, characterized in that, At least two sub-channels are provided between two adjacent fire-fighting flow channels; and / or The number of sub-channels provided between two adjacent fire-fighting flow channels is the same; and / or The two outermost sub-channels of the plurality of sub-channels are each arranged adjacent to one of the fire-fighting channels.

6. The battery device according to claim 5, characterized in that, The fire inlet is located on the cold plate and communicates with part of the fire flow channel. The cold plate assembly includes: At least two connecting ports are provided on the cold plate for connecting at least two of the fire-fighting flow channels and the connecting passage.

7. The battery device according to any one of claims 1 to 6, characterized in that, The second plate is a flat plate.

8. The battery device according to claim 7, characterized in that, The first trench includes a plurality of sub-grooves arranged at intervals in sequence, the beginning and end of the plurality of sub-grooves being connected in sequence, and the second trench is disposed between two adjacent sub-grooves, the extension direction of the sub-grooves being consistent with the extension direction of the second trench.

9. The battery device according to any one of claims 1 to 6, characterized in that, The fire-fighting flow channel is provided with a plurality of fire-fighting medium outlets, which are spaced apart along the extension direction of the fire-fighting flow channel. The battery device also includes a plurality of battery cells, at least a portion of which are arranged sequentially along the extension direction of the fire-fighting flow channel.

10. The battery device according to claim 9, characterized in that, Along the extension direction of the fire-fighting flow channel, the number of battery cells is the same as the number of fire-fighting medium outlets.

11. The battery device according to any one of claims 1 to 6, characterized in that, The surface of the connecting member near the cold plate is provided with a recessed portion that is recessed in a direction away from the cold plate, and the connecting channel is formed by the recessed portion and the outer surface of the cold plate.

12. The battery device according to any one of claims 1 to 6, characterized in that, The cold plate and the connecting member are connected by a threaded connector. The cold plate is provided with a nut for locking the threaded connector. The cold plate is provided with a first mounting hole for the threaded connector to pass through. The connecting member is provided with a second mounting hole for the threaded connector to pass through.

13. The battery device according to claim 12, characterized in that, The nut is installed on the first plate, and is positioned to avoid the area of ​​the first plate used to enclose the heat exchange channel and the fire-fighting channel. Both sides of the nut are provided with gaps from the heat exchange channel and / or the fire-fighting channel. The first mounting hole is provided on the second plate.

14. The battery device according to any one of claims 1 to 6, characterized in that, There are four fire-fighting channels. The two middle fire-fighting channels are connected to the fire-fighting inlet, and the two peripheral fire-fighting channels are connected to their adjacent fire-fighting channels through a connector.

15. An energy storage device, characterized in that, include: At least one battery device as claimed in any one of claims 1 to 14, the battery device being used to store or provide electrical energy.

16. The energy storage device according to claim 15, characterized in that, The number of battery devices is multiple, and the multiple battery devices are arranged sequentially along the height direction of the energy storage device. The fire-fighting medium discharged from the fire-fighting medium outlet of the upper battery device can act on the lower battery device.

17. The energy storage device according to claim 15 or 16, characterized in that, The battery device has a first pressure relief mechanism located on the top surface of the battery device; and / or The battery device includes a battery cell, the battery cell having a second pressure relief mechanism located on the top surface of the battery cell.

18. The energy storage device according to claim 16, characterized in that, The battery device has at least one first pressure relief mechanism located on the top surface of the battery device, and the first pressure relief mechanism of the lower battery device is correspondingly arranged with at least one of the fire-fighting medium outlets on the upper battery device; and / or The battery device includes at least one battery cell, the battery cell having a second pressure relief mechanism located on the top surface of the battery cell, and the second pressure relief mechanism of the battery cell of the lower battery device corresponding to at least one of the fire-fighting medium outlets on the upper battery device.

19. An energy storage system, characterized in that, It includes an energy conversion system and an energy storage device as described in any one of claims 15 to 18, wherein the energy conversion system is connected to the energy storage device to convert current input to or output from the energy storage device into energy.

20. A charging network, characterized in that, include: Charging stations; and The energy storage device as described in any one of claims 15 to 18, or the energy storage system as described in claim 19, wherein the energy storage device is used to provide electrical energy to the charging pile.

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